/*
 * Linux driver for VMware's vmxnet3 ethernet NIC.
 *
 * Copyright (C) 2008-2016, VMware, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; version 2 of the License and no later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Maintained by: pv-drivers@vmware.com
 *
 */


#include "vmxnet3_int.h"

struct vmxnet3_stat_desc {
	char desc[ETH_GSTRING_LEN];
	int  offset;
};


/* per tq stats maintained by the device */
static const struct vmxnet3_stat_desc
vmxnet3_tq_dev_stats[] = {
	/* description,         offset */
	{ "Tx Queue#",        0 },
	{ "  TSO pkts tx",	offsetof(struct UPT1_TxStats, TSOPktsTxOK) },
	{ "  TSO bytes tx",	offsetof(struct UPT1_TxStats, TSOBytesTxOK) },
	{ "  ucast pkts tx",	offsetof(struct UPT1_TxStats, ucastPktsTxOK) },
	{ "  ucast bytes tx",	offsetof(struct UPT1_TxStats, ucastBytesTxOK) },
	{ "  mcast pkts tx",	offsetof(struct UPT1_TxStats, mcastPktsTxOK) },
	{ "  mcast bytes tx",	offsetof(struct UPT1_TxStats, mcastBytesTxOK) },
	{ "  bcast pkts tx",	offsetof(struct UPT1_TxStats, bcastPktsTxOK) },
	{ "  bcast bytes tx",	offsetof(struct UPT1_TxStats, bcastBytesTxOK) },
	{ "  pkts tx err",	offsetof(struct UPT1_TxStats, pktsTxError) },
	{ "  pkts tx discard",	offsetof(struct UPT1_TxStats, pktsTxDiscard) },
};

/* per tq stats maintained by the driver */
static const struct vmxnet3_stat_desc
vmxnet3_tq_driver_stats[] = {
	/* description,         offset */
	{"  drv dropped tx total",	offsetof(struct vmxnet3_tq_driver_stats,
						 drop_total) },
	{ "     too many frags", offsetof(struct vmxnet3_tq_driver_stats,
					  drop_too_many_frags) },
	{ "     giant hdr",	offsetof(struct vmxnet3_tq_driver_stats,
					 drop_oversized_hdr) },
	{ "     hdr err",	offsetof(struct vmxnet3_tq_driver_stats,
					 drop_hdr_inspect_err) },
	{ "     tso",		offsetof(struct vmxnet3_tq_driver_stats,
					 drop_tso) },
	{ "  ring full",	offsetof(struct vmxnet3_tq_driver_stats,
					 tx_ring_full) },
	{ "  pkts linearized",	offsetof(struct vmxnet3_tq_driver_stats,
					 linearized) },
	{ "  hdr cloned",	offsetof(struct vmxnet3_tq_driver_stats,
					 copy_skb_header) },
	{ "  giant hdr",	offsetof(struct vmxnet3_tq_driver_stats,
					 oversized_hdr) },
};

/* per rq stats maintained by the device */
static const struct vmxnet3_stat_desc
vmxnet3_rq_dev_stats[] = {
	{ "Rx Queue#",        0 },
	{ "  LRO pkts rx",	offsetof(struct UPT1_RxStats, LROPktsRxOK) },
	{ "  LRO byte rx",	offsetof(struct UPT1_RxStats, LROBytesRxOK) },
	{ "  ucast pkts rx",	offsetof(struct UPT1_RxStats, ucastPktsRxOK) },
	{ "  ucast bytes rx",	offsetof(struct UPT1_RxStats, ucastBytesRxOK) },
	{ "  mcast pkts rx",	offsetof(struct UPT1_RxStats, mcastPktsRxOK) },
	{ "  mcast bytes rx",	offsetof(struct UPT1_RxStats, mcastBytesRxOK) },
	{ "  bcast pkts rx",	offsetof(struct UPT1_RxStats, bcastPktsRxOK) },
	{ "  bcast bytes rx",	offsetof(struct UPT1_RxStats, bcastBytesRxOK) },
	{ "  pkts rx OOB",	offsetof(struct UPT1_RxStats, pktsRxOutOfBuf) },
	{ "  pkts rx err",	offsetof(struct UPT1_RxStats, pktsRxError) },
};

/* per rq stats maintained by the driver */
static const struct vmxnet3_stat_desc
vmxnet3_rq_driver_stats[] = {
	/* description,         offset */
	{ "  drv dropped rx total", offsetof(struct vmxnet3_rq_driver_stats,
					     drop_total) },
	{ "     err",		offsetof(struct vmxnet3_rq_driver_stats,
					 drop_err) },
	{ "     fcs",		offsetof(struct vmxnet3_rq_driver_stats,
					 drop_fcs) },
	{ "  rx buf alloc fail", offsetof(struct vmxnet3_rq_driver_stats,
					  rx_buf_alloc_failure) },
};

/* global stats maintained by the driver */
static const struct vmxnet3_stat_desc
vmxnet3_global_stats[] = {
	/* description,         offset */
	{ "tx timeout count",	offsetof(struct vmxnet3_adapter,
					 tx_timeout_count) }
};


void
vmxnet3_get_stats64(struct net_device *netdev,
		   struct rtnl_link_stats64 *stats)
{
	struct vmxnet3_adapter *adapter;
	struct vmxnet3_tq_driver_stats *drvTxStats;
	struct vmxnet3_rq_driver_stats *drvRxStats;
	struct UPT1_TxStats *devTxStats;
	struct UPT1_RxStats *devRxStats;
	unsigned long flags;
	int i;

	adapter = netdev_priv(netdev);

	/* Collect the dev stats into the shared area */
	spin_lock_irqsave(&adapter->cmd_lock, flags);
	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
	spin_unlock_irqrestore(&adapter->cmd_lock, flags);

	for (i = 0; i < adapter->num_tx_queues; i++) {
		devTxStats = &adapter->tqd_start[i].stats;
		drvTxStats = &adapter->tx_queue[i].stats;
		stats->tx_packets += devTxStats->ucastPktsTxOK +
				     devTxStats->mcastPktsTxOK +
				     devTxStats->bcastPktsTxOK;
		stats->tx_bytes += devTxStats->ucastBytesTxOK +
				   devTxStats->mcastBytesTxOK +
				   devTxStats->bcastBytesTxOK;
		stats->tx_errors += devTxStats->pktsTxError;
		stats->tx_dropped += drvTxStats->drop_total;
	}

	for (i = 0; i < adapter->num_rx_queues; i++) {
		devRxStats = &adapter->rqd_start[i].stats;
		drvRxStats = &adapter->rx_queue[i].stats;
		stats->rx_packets += devRxStats->ucastPktsRxOK +
				     devRxStats->mcastPktsRxOK +
				     devRxStats->bcastPktsRxOK;

		stats->rx_bytes += devRxStats->ucastBytesRxOK +
				   devRxStats->mcastBytesRxOK +
				   devRxStats->bcastBytesRxOK;

		stats->rx_errors += devRxStats->pktsRxError;
		stats->rx_dropped += drvRxStats->drop_total;
		stats->multicast +=  devRxStats->mcastPktsRxOK;
	}
}

static int
vmxnet3_get_sset_count(struct net_device *netdev, int sset)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	switch (sset) {
	case ETH_SS_STATS:
		return (ARRAY_SIZE(vmxnet3_tq_dev_stats) +
			ARRAY_SIZE(vmxnet3_tq_driver_stats)) *
		       adapter->num_tx_queues +
		       (ARRAY_SIZE(vmxnet3_rq_dev_stats) +
			ARRAY_SIZE(vmxnet3_rq_driver_stats)) *
		       adapter->num_rx_queues +
			ARRAY_SIZE(vmxnet3_global_stats);
	default:
		return -EOPNOTSUPP;
	}
}


/* This is a version 2 of the vmxnet3 ethtool_regs which goes hand in hand with
 * the version 2 of the vmxnet3 support for ethtool(8) --register-dump.
 * Therefore, if any registers are added, removed or modified, then a version
 * bump and a corresponding change in the vmxnet3 support for ethtool(8)
 * --register-dump would be required.
 */
static int
vmxnet3_get_regs_len(struct net_device *netdev)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	return ((9 /* BAR1 registers */ +
		(1 + adapter->intr.num_intrs) +
		(1 + adapter->num_tx_queues * 17 /* Tx queue registers */) +
		(1 + adapter->num_rx_queues * 23 /* Rx queue registers */)) *
		sizeof(u32));
}


static void
vmxnet3_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	strlcpy(drvinfo->driver, vmxnet3_driver_name, sizeof(drvinfo->driver));

	strlcpy(drvinfo->version, VMXNET3_DRIVER_VERSION_REPORT,
		sizeof(drvinfo->version));

	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
		sizeof(drvinfo->bus_info));
}


static void
vmxnet3_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
{
	 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	if (stringset == ETH_SS_STATS) {
		int i, j;
		for (j = 0; j < adapter->num_tx_queues; j++) {
			for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++) {
				memcpy(buf, vmxnet3_tq_dev_stats[i].desc,
				       ETH_GSTRING_LEN);
				buf += ETH_GSTRING_LEN;
			}
			for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats);
			     i++) {
				memcpy(buf, vmxnet3_tq_driver_stats[i].desc,
				       ETH_GSTRING_LEN);
				buf += ETH_GSTRING_LEN;
			}
		}

		for (j = 0; j < adapter->num_rx_queues; j++) {
			for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++) {
				memcpy(buf, vmxnet3_rq_dev_stats[i].desc,
				       ETH_GSTRING_LEN);
				buf += ETH_GSTRING_LEN;
			}
			for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats);
			     i++) {
				memcpy(buf, vmxnet3_rq_driver_stats[i].desc,
				       ETH_GSTRING_LEN);
				buf += ETH_GSTRING_LEN;
			}
		}

		for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++) {
			memcpy(buf, vmxnet3_global_stats[i].desc,
				ETH_GSTRING_LEN);
			buf += ETH_GSTRING_LEN;
		}
	}
}

int vmxnet3_set_features(struct net_device *netdev, netdev_features_t features)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	unsigned long flags;
	netdev_features_t changed = features ^ netdev->features;

	if (changed & (NETIF_F_RXCSUM | NETIF_F_LRO |
		       NETIF_F_HW_VLAN_CTAG_RX)) {
		if (features & NETIF_F_RXCSUM)
			adapter->shared->devRead.misc.uptFeatures |=
			UPT1_F_RXCSUM;
		else
			adapter->shared->devRead.misc.uptFeatures &=
			~UPT1_F_RXCSUM;

		/* update hardware LRO capability accordingly */
		if (features & NETIF_F_LRO)
			adapter->shared->devRead.misc.uptFeatures |=
							UPT1_F_LRO;
		else
			adapter->shared->devRead.misc.uptFeatures &=
							~UPT1_F_LRO;

		if (features & NETIF_F_HW_VLAN_CTAG_RX)
			adapter->shared->devRead.misc.uptFeatures |=
			UPT1_F_RXVLAN;
		else
			adapter->shared->devRead.misc.uptFeatures &=
			~UPT1_F_RXVLAN;

		spin_lock_irqsave(&adapter->cmd_lock, flags);
		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
				       VMXNET3_CMD_UPDATE_FEATURE);
		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
	}
	return 0;
}

static void
vmxnet3_get_ethtool_stats(struct net_device *netdev,
			  struct ethtool_stats *stats, u64  *buf)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	unsigned long flags;
	u8 *base;
	int i;
	int j = 0;

	spin_lock_irqsave(&adapter->cmd_lock, flags);
	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
	spin_unlock_irqrestore(&adapter->cmd_lock, flags);

	/* this does assume each counter is 64-bit wide */
	for (j = 0; j < adapter->num_tx_queues; j++) {
		base = (u8 *)&adapter->tqd_start[j].stats;
		*buf++ = (u64)j;
		for (i = 1; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++)
			*buf++ = *(u64 *)(base +
					  vmxnet3_tq_dev_stats[i].offset);

		base = (u8 *)&adapter->tx_queue[j].stats;
		for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats); i++)
			*buf++ = *(u64 *)(base +
					  vmxnet3_tq_driver_stats[i].offset);
	}

	for (j = 0; j < adapter->num_rx_queues; j++) {
		base = (u8 *)&adapter->rqd_start[j].stats;
		*buf++ = (u64) j;
		for (i = 1; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++)
			*buf++ = *(u64 *)(base +
					  vmxnet3_rq_dev_stats[i].offset);

		base = (u8 *)&adapter->rx_queue[j].stats;
		for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats); i++)
			*buf++ = *(u64 *)(base +
					  vmxnet3_rq_driver_stats[i].offset);
	}

	base = (u8 *)adapter;
	for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++)
		*buf++ = *(u64 *)(base + vmxnet3_global_stats[i].offset);
}


/* This is a version 2 of the vmxnet3 ethtool_regs which goes hand in hand with
 * the version 2 of the vmxnet3 support for ethtool(8) --register-dump.
 * Therefore, if any registers are added, removed or modified, then a version
 * bump and a corresponding change in the vmxnet3 support for ethtool(8)
 * --register-dump would be required.
 */
static void
vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	u32 *buf = p;
	int i = 0, j = 0;

	memset(p, 0, vmxnet3_get_regs_len(netdev));

	regs->version = 2;

	/* Update vmxnet3_get_regs_len if we want to dump more registers */

	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DSAL);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DSAH);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
	buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ECR);

	buf[j++] = adapter->intr.num_intrs;
	for (i = 0; i < adapter->intr.num_intrs; i++) {
		buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_IMR
						 + i * VMXNET3_REG_ALIGN);
	}

	buf[j++] = adapter->num_tx_queues;
	for (i = 0; i < adapter->num_tx_queues; i++) {
		struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];

		buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_TXPROD +
						 i * VMXNET3_REG_ALIGN);

		buf[j++] = VMXNET3_GET_ADDR_LO(tq->tx_ring.basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(tq->tx_ring.basePA);
		buf[j++] = tq->tx_ring.size;
		buf[j++] = tq->tx_ring.next2fill;
		buf[j++] = tq->tx_ring.next2comp;
		buf[j++] = tq->tx_ring.gen;

		buf[j++] = VMXNET3_GET_ADDR_LO(tq->data_ring.basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(tq->data_ring.basePA);
		buf[j++] = tq->data_ring.size;
		buf[j++] = tq->txdata_desc_size;

		buf[j++] = VMXNET3_GET_ADDR_LO(tq->comp_ring.basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(tq->comp_ring.basePA);
		buf[j++] = tq->comp_ring.size;
		buf[j++] = tq->comp_ring.next2proc;
		buf[j++] = tq->comp_ring.gen;

		buf[j++] = tq->stopped;
	}

	buf[j++] = adapter->num_rx_queues;
	for (i = 0; i < adapter->num_rx_queues; i++) {
		struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];

		buf[j++] =  VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_RXPROD +
						  i * VMXNET3_REG_ALIGN);
		buf[j++] =  VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_RXPROD2 +
						  i * VMXNET3_REG_ALIGN);

		buf[j++] = VMXNET3_GET_ADDR_LO(rq->rx_ring[0].basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(rq->rx_ring[0].basePA);
		buf[j++] = rq->rx_ring[0].size;
		buf[j++] = rq->rx_ring[0].next2fill;
		buf[j++] = rq->rx_ring[0].next2comp;
		buf[j++] = rq->rx_ring[0].gen;

		buf[j++] = VMXNET3_GET_ADDR_LO(rq->rx_ring[1].basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(rq->rx_ring[1].basePA);
		buf[j++] = rq->rx_ring[1].size;
		buf[j++] = rq->rx_ring[1].next2fill;
		buf[j++] = rq->rx_ring[1].next2comp;
		buf[j++] = rq->rx_ring[1].gen;

		buf[j++] = VMXNET3_GET_ADDR_LO(rq->data_ring.basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(rq->data_ring.basePA);
		buf[j++] = rq->rx_ring[0].size;
		buf[j++] = rq->data_ring.desc_size;

		buf[j++] = VMXNET3_GET_ADDR_LO(rq->comp_ring.basePA);
		buf[j++] = VMXNET3_GET_ADDR_HI(rq->comp_ring.basePA);
		buf[j++] = rq->comp_ring.size;
		buf[j++] = rq->comp_ring.next2proc;
		buf[j++] = rq->comp_ring.gen;
	}
}


static void
vmxnet3_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	wol->supported = WAKE_UCAST | WAKE_ARP | WAKE_MAGIC;
	wol->wolopts = adapter->wol;
}


static int
vmxnet3_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	if (wol->wolopts & (WAKE_PHY | WAKE_MCAST | WAKE_BCAST |
			    WAKE_MAGICSECURE)) {
		return -EOPNOTSUPP;
	}

	adapter->wol = wol->wolopts;

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

	return 0;
}


static int
vmxnet3_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	ecmd->supported = SUPPORTED_10000baseT_Full | SUPPORTED_1000baseT_Full |
			  SUPPORTED_TP;
	ecmd->advertising = ADVERTISED_TP;
	ecmd->port = PORT_TP;
	ecmd->transceiver = XCVR_INTERNAL;

	if (adapter->link_speed) {
		ethtool_cmd_speed_set(ecmd, adapter->link_speed);
		ecmd->duplex = DUPLEX_FULL;
	} else {
		ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
		ecmd->duplex = DUPLEX_UNKNOWN;
	}
	return 0;
}


static void
vmxnet3_get_ringparam(struct net_device *netdev,
		      struct ethtool_ringparam *param)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	param->rx_max_pending = VMXNET3_RX_RING_MAX_SIZE;
	param->tx_max_pending = VMXNET3_TX_RING_MAX_SIZE;
	param->rx_mini_max_pending = VMXNET3_VERSION_GE_3(adapter) ?
		VMXNET3_RXDATA_DESC_MAX_SIZE : 0;
	param->rx_jumbo_max_pending = VMXNET3_RX_RING2_MAX_SIZE;

	param->rx_pending = adapter->rx_ring_size;
	param->tx_pending = adapter->tx_ring_size;
	param->rx_mini_pending = VMXNET3_VERSION_GE_3(adapter) ?
		adapter->rxdata_desc_size : 0;
	param->rx_jumbo_pending = adapter->rx_ring2_size;
}


static int
vmxnet3_set_ringparam(struct net_device *netdev,
		      struct ethtool_ringparam *param)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	u32 new_tx_ring_size, new_rx_ring_size, new_rx_ring2_size;
	u16 new_rxdata_desc_size;
	u32 sz;
	int err = 0;

	if (param->tx_pending == 0 || param->tx_pending >
						VMXNET3_TX_RING_MAX_SIZE)
		return -EINVAL;

	if (param->rx_pending == 0 || param->rx_pending >
						VMXNET3_RX_RING_MAX_SIZE)
		return -EINVAL;

	if (param->rx_jumbo_pending == 0 ||
	    param->rx_jumbo_pending > VMXNET3_RX_RING2_MAX_SIZE)
		return -EINVAL;

	/* if adapter not yet initialized, do nothing */
	if (adapter->rx_buf_per_pkt == 0) {
		netdev_err(netdev, "adapter not completely initialized, "
			   "ring size cannot be changed yet\n");
		return -EOPNOTSUPP;
	}

	if (VMXNET3_VERSION_GE_3(adapter)) {
		if (param->rx_mini_pending < 0 ||
		    param->rx_mini_pending > VMXNET3_RXDATA_DESC_MAX_SIZE) {
			return -EINVAL;
		}
	} else if (param->rx_mini_pending != 0) {
		return -EINVAL;
	}

	/* round it up to a multiple of VMXNET3_RING_SIZE_ALIGN */
	new_tx_ring_size = (param->tx_pending + VMXNET3_RING_SIZE_MASK) &
							~VMXNET3_RING_SIZE_MASK;
	new_tx_ring_size = min_t(u32, new_tx_ring_size,
				 VMXNET3_TX_RING_MAX_SIZE);
	if (new_tx_ring_size > VMXNET3_TX_RING_MAX_SIZE || (new_tx_ring_size %
						VMXNET3_RING_SIZE_ALIGN) != 0)
		return -EINVAL;

	/* ring0 has to be a multiple of
	 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
	 */
	sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
	new_rx_ring_size = (param->rx_pending + sz - 1) / sz * sz;
	new_rx_ring_size = min_t(u32, new_rx_ring_size,
				 VMXNET3_RX_RING_MAX_SIZE / sz * sz);
	if (new_rx_ring_size > VMXNET3_RX_RING_MAX_SIZE || (new_rx_ring_size %
							   sz) != 0)
		return -EINVAL;

	/* ring2 has to be a multiple of VMXNET3_RING_SIZE_ALIGN */
	new_rx_ring2_size = (param->rx_jumbo_pending + VMXNET3_RING_SIZE_MASK) &
				~VMXNET3_RING_SIZE_MASK;
	new_rx_ring2_size = min_t(u32, new_rx_ring2_size,
				  VMXNET3_RX_RING2_MAX_SIZE);

	/* rx data ring buffer size has to be a multiple of
	 * VMXNET3_RXDATA_DESC_SIZE_ALIGN
	 */
	new_rxdata_desc_size =
		(param->rx_mini_pending + VMXNET3_RXDATA_DESC_SIZE_MASK) &
		~VMXNET3_RXDATA_DESC_SIZE_MASK;
	new_rxdata_desc_size = min_t(u16, new_rxdata_desc_size,
				     VMXNET3_RXDATA_DESC_MAX_SIZE);

	if (new_tx_ring_size == adapter->tx_ring_size &&
	    new_rx_ring_size == adapter->rx_ring_size &&
	    new_rx_ring2_size == adapter->rx_ring2_size &&
	    new_rxdata_desc_size == adapter->rxdata_desc_size) {
		return 0;
	}

	/*
	 * Reset_work may be in the middle of resetting the device, wait for its
	 * completion.
	 */
	while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
		msleep(1);

	if (netif_running(netdev)) {
		vmxnet3_quiesce_dev(adapter);
		vmxnet3_reset_dev(adapter);

		/* recreate the rx queue and the tx queue based on the
		 * new sizes */
		vmxnet3_tq_destroy_all(adapter);
		vmxnet3_rq_destroy_all(adapter);

		err = vmxnet3_create_queues(adapter, new_tx_ring_size,
					    new_rx_ring_size, new_rx_ring2_size,
					    adapter->txdata_desc_size,
					    new_rxdata_desc_size);
		if (err) {
			/* failed, most likely because of OOM, try default
			 * size */
			netdev_err(netdev, "failed to apply new sizes, "
				   "try the default ones\n");
			new_rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
			new_rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
			new_tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
			new_rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ?
				VMXNET3_DEF_RXDATA_DESC_SIZE : 0;

			err = vmxnet3_create_queues(adapter,
						    new_tx_ring_size,
						    new_rx_ring_size,
						    new_rx_ring2_size,
						    adapter->txdata_desc_size,
						    new_rxdata_desc_size);
			if (err) {
				netdev_err(netdev, "failed to create queues "
					   "with default sizes. Closing it\n");
				goto out;
			}
		}

		err = vmxnet3_activate_dev(adapter);
		if (err)
			netdev_err(netdev, "failed to re-activate, error %d."
				   " Closing it\n", err);
	}
	adapter->tx_ring_size = new_tx_ring_size;
	adapter->rx_ring_size = new_rx_ring_size;
	adapter->rx_ring2_size = new_rx_ring2_size;
	adapter->rxdata_desc_size = new_rxdata_desc_size;

out:
	clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
	if (err)
		vmxnet3_force_close(adapter);

	return err;
}


static int
vmxnet3_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
		  u32 *rules)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	switch (info->cmd) {
	case ETHTOOL_GRXRINGS:
		info->data = adapter->num_rx_queues;
		return 0;
	}
	return -EOPNOTSUPP;
}

#ifdef VMXNET3_RSS
static u32
vmxnet3_get_rss_indir_size(struct net_device *netdev)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	struct UPT1_RSSConf *rssConf = adapter->rss_conf;

	return rssConf->indTableSize;
}

static int
vmxnet3_get_rss(struct net_device *netdev, u32 *p, u8 *key, u8 *hfunc)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	struct UPT1_RSSConf *rssConf = adapter->rss_conf;
	unsigned int n = rssConf->indTableSize;

	if (hfunc)
		*hfunc = ETH_RSS_HASH_TOP;
	if (!p)
		return 0;
	while (n--)
		p[n] = rssConf->indTable[n];
	return 0;

}

static int
vmxnet3_set_rss(struct net_device *netdev, const u32 *p, const u8 *key,
		const u8 hfunc)
{
	unsigned int i;
	unsigned long flags;
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	struct UPT1_RSSConf *rssConf = adapter->rss_conf;

	/* We do not allow change in unsupported parameters */
	if (key ||
	    (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
		return -EOPNOTSUPP;
	if (!p)
		return 0;
	for (i = 0; i < rssConf->indTableSize; i++)
		rssConf->indTable[i] = p[i];

	spin_lock_irqsave(&adapter->cmd_lock, flags);
	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
			       VMXNET3_CMD_UPDATE_RSSIDT);
	spin_unlock_irqrestore(&adapter->cmd_lock, flags);

	return 0;

}
#endif

static int
vmxnet3_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);

	if (!VMXNET3_VERSION_GE_3(adapter))
		return -EOPNOTSUPP;

	switch (adapter->coal_conf->coalMode) {
	case VMXNET3_COALESCE_DISABLED:
		/* struct ethtool_coalesce is already initialized to 0 */
		break;
	case VMXNET3_COALESCE_ADAPT:
		ec->use_adaptive_rx_coalesce = true;
		break;
	case VMXNET3_COALESCE_STATIC:
		ec->tx_max_coalesced_frames =
			adapter->coal_conf->coalPara.coalStatic.tx_comp_depth;
		ec->rx_max_coalesced_frames =
			adapter->coal_conf->coalPara.coalStatic.rx_depth;
		break;
	case VMXNET3_COALESCE_RBC: {
		u32 rbc_rate;

		rbc_rate = adapter->coal_conf->coalPara.coalRbc.rbc_rate;
		ec->rx_coalesce_usecs = VMXNET3_COAL_RBC_USECS(rbc_rate);
	}
		break;
	default:
		return -EOPNOTSUPP;
	}

	return 0;
}

static int
vmxnet3_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec)
{
	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
	struct Vmxnet3_DriverShared *shared = adapter->shared;
	union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
	unsigned long flags;

	if (!VMXNET3_VERSION_GE_3(adapter))
		return -EOPNOTSUPP;

	if (ec->rx_coalesce_usecs_irq ||
	    ec->rx_max_coalesced_frames_irq ||
	    ec->tx_coalesce_usecs ||
	    ec->tx_coalesce_usecs_irq ||
	    ec->tx_max_coalesced_frames_irq ||
	    ec->stats_block_coalesce_usecs ||
	    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 -EINVAL;
	}

	if ((ec->rx_coalesce_usecs == 0) &&
	    (ec->use_adaptive_rx_coalesce == 0) &&
	    (ec->tx_max_coalesced_frames == 0) &&
	    (ec->rx_max_coalesced_frames == 0)) {
		memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
		adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED;
		goto done;
	}

	if (ec->rx_coalesce_usecs != 0) {
		u32 rbc_rate;

		if ((ec->use_adaptive_rx_coalesce != 0) ||
		    (ec->tx_max_coalesced_frames != 0) ||
		    (ec->rx_max_coalesced_frames != 0)) {
			return -EINVAL;
		}

		rbc_rate = VMXNET3_COAL_RBC_RATE(ec->rx_coalesce_usecs);
		if (rbc_rate < VMXNET3_COAL_RBC_MIN_RATE ||
		    rbc_rate > VMXNET3_COAL_RBC_MAX_RATE) {
			return -EINVAL;
		}

		memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
		adapter->coal_conf->coalMode = VMXNET3_COALESCE_RBC;
		adapter->coal_conf->coalPara.coalRbc.rbc_rate = rbc_rate;
		goto done;
	}

	if (ec->use_adaptive_rx_coalesce != 0) {
		if ((ec->rx_coalesce_usecs != 0) ||
		    (ec->tx_max_coalesced_frames != 0) ||
		    (ec->rx_max_coalesced_frames != 0)) {
			return -EINVAL;
		}
		memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
		adapter->coal_conf->coalMode = VMXNET3_COALESCE_ADAPT;
		goto done;
	}

	if ((ec->tx_max_coalesced_frames != 0) ||
	    (ec->rx_max_coalesced_frames != 0)) {
		if ((ec->rx_coalesce_usecs != 0) ||
		    (ec->use_adaptive_rx_coalesce != 0)) {
			return -EINVAL;
		}

		if ((ec->tx_max_coalesced_frames >
		    VMXNET3_COAL_STATIC_MAX_DEPTH) ||
		    (ec->rx_max_coalesced_frames >
		     VMXNET3_COAL_STATIC_MAX_DEPTH)) {
			return -EINVAL;
		}

		memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
		adapter->coal_conf->coalMode = VMXNET3_COALESCE_STATIC;

		adapter->coal_conf->coalPara.coalStatic.tx_comp_depth =
			(ec->tx_max_coalesced_frames ?
			 ec->tx_max_coalesced_frames :
			 VMXNET3_COAL_STATIC_DEFAULT_DEPTH);

		adapter->coal_conf->coalPara.coalStatic.rx_depth =
			(ec->rx_max_coalesced_frames ?
			 ec->rx_max_coalesced_frames :
			 VMXNET3_COAL_STATIC_DEFAULT_DEPTH);

		adapter->coal_conf->coalPara.coalStatic.tx_depth =
			 VMXNET3_COAL_STATIC_DEFAULT_DEPTH;
		goto done;
	}

done:
	adapter->default_coal_mode = false;
	if (netif_running(netdev)) {
		spin_lock_irqsave(&adapter->cmd_lock, flags);
		cmdInfo->varConf.confVer = 1;
		cmdInfo->varConf.confLen =
			cpu_to_le32(sizeof(*adapter->coal_conf));
		cmdInfo->varConf.confPA  = cpu_to_le64(adapter->coal_conf_pa);
		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
				       VMXNET3_CMD_SET_COALESCE);
		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
	}

	return 0;
}

static const struct ethtool_ops vmxnet3_ethtool_ops = {
	.get_settings      = vmxnet3_get_settings,
	.get_drvinfo       = vmxnet3_get_drvinfo,
	.get_regs_len      = vmxnet3_get_regs_len,
	.get_regs          = vmxnet3_get_regs,
	.get_wol           = vmxnet3_get_wol,
	.set_wol           = vmxnet3_set_wol,
	.get_link          = ethtool_op_get_link,
	.get_coalesce      = vmxnet3_get_coalesce,
	.set_coalesce      = vmxnet3_set_coalesce,
	.get_strings       = vmxnet3_get_strings,
	.get_sset_count	   = vmxnet3_get_sset_count,
	.get_ethtool_stats = vmxnet3_get_ethtool_stats,
	.get_ringparam     = vmxnet3_get_ringparam,
	.set_ringparam     = vmxnet3_set_ringparam,
	.get_rxnfc         = vmxnet3_get_rxnfc,
#ifdef VMXNET3_RSS
	.get_rxfh_indir_size = vmxnet3_get_rss_indir_size,
	.get_rxfh          = vmxnet3_get_rss,
	.set_rxfh          = vmxnet3_set_rss,
#endif
};

void vmxnet3_set_ethtool_ops(struct net_device *netdev)
{
	netdev->ethtool_ops = &vmxnet3_ethtool_ops;
}