drivers/net/ethernet/intel/i40e/i40e_ethtool.c

/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Driver
 * Copyright(c) 2013 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  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".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

/* ethtool support for i40e */

#include "i40e.h"
#include "i40e_diag.h"

struct i40e_stats {
	char stat_string[ETH_GSTRING_LEN];
	int sizeof_stat;
	int stat_offset;
};

#define I40E_STAT(_type, _name, _stat) { \
	.stat_string = _name, \
	.sizeof_stat = FIELD_SIZEOF(_type, _stat), \
	.stat_offset = offsetof(_type, _stat) \
}
#define I40E_NETDEV_STAT(_net_stat) \
		I40E_STAT(struct net_device_stats, #_net_stat, _net_stat)
#define I40E_PF_STAT(_name, _stat) \
		I40E_STAT(struct i40e_pf, _name, _stat)
#define I40E_VSI_STAT(_name, _stat) \
		I40E_STAT(struct i40e_vsi, _name, _stat)

static const struct i40e_stats i40e_gstrings_net_stats[] = {
	I40E_NETDEV_STAT(rx_packets),
	I40E_NETDEV_STAT(tx_packets),
	I40E_NETDEV_STAT(rx_bytes),
	I40E_NETDEV_STAT(tx_bytes),
	I40E_NETDEV_STAT(rx_errors),
	I40E_NETDEV_STAT(tx_errors),
	I40E_NETDEV_STAT(rx_dropped),
	I40E_NETDEV_STAT(tx_dropped),
	I40E_NETDEV_STAT(multicast),
	I40E_NETDEV_STAT(collisions),
	I40E_NETDEV_STAT(rx_length_errors),
	I40E_NETDEV_STAT(rx_crc_errors),
};

/* These PF_STATs might look like duplicates of some NETDEV_STATs,
 * but they are separate.  This device supports Virtualization, and
 * as such might have several netdevs supporting VMDq and FCoE going
 * through a single port.  The NETDEV_STATs are for individual netdevs
 * seen at the top of the stack, and the PF_STATs are for the physical
 * function at the bottom of the stack hosting those netdevs.
 *
 * The PF_STATs are appended to the netdev stats only when ethtool -S
 * is queried on the base PF netdev, not on the VMDq or FCoE netdev.
 */
static struct i40e_stats i40e_gstrings_stats[] = {
	I40E_PF_STAT("rx_bytes", stats.eth.rx_bytes),
	I40E_PF_STAT("tx_bytes", stats.eth.tx_bytes),
	I40E_PF_STAT("rx_errors", stats.eth.rx_errors),
	I40E_PF_STAT("tx_errors", stats.eth.tx_errors),
	I40E_PF_STAT("rx_dropped", stats.eth.rx_discards),
	I40E_PF_STAT("tx_dropped", stats.eth.tx_discards),
	I40E_PF_STAT("tx_dropped_link_down", stats.tx_dropped_link_down),
	I40E_PF_STAT("crc_errors", stats.crc_errors),
	I40E_PF_STAT("illegal_bytes", stats.illegal_bytes),
	I40E_PF_STAT("mac_local_faults", stats.mac_local_faults),
	I40E_PF_STAT("mac_remote_faults", stats.mac_remote_faults),
	I40E_PF_STAT("rx_length_errors", stats.rx_length_errors),
	I40E_PF_STAT("link_xon_rx", stats.link_xon_rx),
	I40E_PF_STAT("link_xoff_rx", stats.link_xoff_rx),
	I40E_PF_STAT("link_xon_tx", stats.link_xon_tx),
	I40E_PF_STAT("link_xoff_tx", stats.link_xoff_tx),
	I40E_PF_STAT("rx_size_64", stats.rx_size_64),
	I40E_PF_STAT("rx_size_127", stats.rx_size_127),
	I40E_PF_STAT("rx_size_255", stats.rx_size_255),
	I40E_PF_STAT("rx_size_511", stats.rx_size_511),
	I40E_PF_STAT("rx_size_1023", stats.rx_size_1023),
	I40E_PF_STAT("rx_size_1522", stats.rx_size_1522),
	I40E_PF_STAT("rx_size_big", stats.rx_size_big),
	I40E_PF_STAT("tx_size_64", stats.tx_size_64),
	I40E_PF_STAT("tx_size_127", stats.tx_size_127),
	I40E_PF_STAT("tx_size_255", stats.tx_size_255),
	I40E_PF_STAT("tx_size_511", stats.tx_size_511),
	I40E_PF_STAT("tx_size_1023", stats.tx_size_1023),
	I40E_PF_STAT("tx_size_1522", stats.tx_size_1522),
	I40E_PF_STAT("tx_size_big", stats.tx_size_big),
	I40E_PF_STAT("rx_undersize", stats.rx_undersize),
	I40E_PF_STAT("rx_fragments", stats.rx_fragments),
	I40E_PF_STAT("rx_oversize", stats.rx_oversize),
	I40E_PF_STAT("rx_jabber", stats.rx_jabber),
	I40E_PF_STAT("VF_admin_queue_requests", vf_aq_requests),
};

#define I40E_QUEUE_STATS_LEN(n) \
  ((((struct i40e_netdev_priv *)netdev_priv((n)))->vsi->num_queue_pairs + \
    ((struct i40e_netdev_priv *)netdev_priv((n)))->vsi->num_queue_pairs) * 2)
#define I40E_GLOBAL_STATS_LEN	ARRAY_SIZE(i40e_gstrings_stats)
#define I40E_NETDEV_STATS_LEN   ARRAY_SIZE(i40e_gstrings_net_stats)
#define I40E_VSI_STATS_LEN(n)   (I40E_NETDEV_STATS_LEN + \
				 I40E_QUEUE_STATS_LEN((n)))
#define I40E_PFC_STATS_LEN ( \
		(FIELD_SIZEOF(struct i40e_pf, stats.priority_xoff_rx) + \
		 FIELD_SIZEOF(struct i40e_pf, stats.priority_xon_rx) + \
		 FIELD_SIZEOF(struct i40e_pf, stats.priority_xoff_tx) + \
		 FIELD_SIZEOF(struct i40e_pf, stats.priority_xon_tx) + \
		 FIELD_SIZEOF(struct i40e_pf, stats.priority_xon_2_xoff)) \
		 / sizeof(u64))
#define I40E_PF_STATS_LEN(n)	(I40E_GLOBAL_STATS_LEN + \
				 I40E_PFC_STATS_LEN + \
				 I40E_VSI_STATS_LEN((n)))

enum i40e_ethtool_test_id {
	I40E_ETH_TEST_REG = 0,
	I40E_ETH_TEST_EEPROM,
	I40E_ETH_TEST_INTR,
	I40E_ETH_TEST_LOOPBACK,
	I40E_ETH_TEST_LINK,
};

static const char i40e_gstrings_test[][ETH_GSTRING_LEN] = {
	"Register test  (offline)",
	"Eeprom test    (offline)",
	"Interrupt test (offline)",
	"Loopback test  (offline)",
	"Link test   (on/offline)"
};

#define I40E_TEST_LEN (sizeof(i40e_gstrings_test) / ETH_GSTRING_LEN)

/**
 * i40e_get_settings - Get Link Speed and Duplex settings
 * @netdev: network interface device structure
 * @ecmd: ethtool command
 *
 * Reports speed/duplex settings based on media_type
 **/
static int i40e_get_settings(struct net_device *netdev,
			     struct ethtool_cmd *ecmd)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	struct i40e_link_status *hw_link_info = &hw->phy.link_info;
	bool link_up = hw_link_info->link_info & I40E_AQ_LINK_UP;
	u32 link_speed = hw_link_info->link_speed;

	/* hardware is either in 40G mode or 10G mode
	 * NOTE: this section initializes supported and advertising
	 */
	switch (hw_link_info->phy_type) {
	case I40E_PHY_TYPE_40GBASE_CR4:
	case I40E_PHY_TYPE_40GBASE_CR4_CU:
		ecmd->supported = SUPPORTED_40000baseCR4_Full;
		ecmd->advertising = ADVERTISED_40000baseCR4_Full;
		break;
	case I40E_PHY_TYPE_40GBASE_KR4:
		ecmd->supported = SUPPORTED_40000baseKR4_Full;
		ecmd->advertising = ADVERTISED_40000baseKR4_Full;
		break;
	case I40E_PHY_TYPE_40GBASE_SR4:
		ecmd->supported = SUPPORTED_40000baseSR4_Full;
		ecmd->advertising = ADVERTISED_40000baseSR4_Full;
		break;
	case I40E_PHY_TYPE_40GBASE_LR4:
		ecmd->supported = SUPPORTED_40000baseLR4_Full;
		ecmd->advertising = ADVERTISED_40000baseLR4_Full;
		break;
	case I40E_PHY_TYPE_10GBASE_KX4:
		ecmd->supported = SUPPORTED_10000baseKX4_Full;
		ecmd->advertising = ADVERTISED_10000baseKX4_Full;
		break;
	case I40E_PHY_TYPE_10GBASE_KR:
		ecmd->supported = SUPPORTED_10000baseKR_Full;
		ecmd->advertising = ADVERTISED_10000baseKR_Full;
		break;
	default:
		if (i40e_is_40G_device(hw->device_id)) {
			ecmd->supported = SUPPORTED_40000baseSR4_Full;
			ecmd->advertising = ADVERTISED_40000baseSR4_Full;
		} else {
			ecmd->supported = SUPPORTED_10000baseT_Full;
			ecmd->advertising = ADVERTISED_10000baseT_Full;
		}
		break;
	}

	ecmd->supported |= SUPPORTED_Autoneg;
	ecmd->advertising |= ADVERTISED_Autoneg;
	ecmd->autoneg = ((hw_link_info->an_info & I40E_AQ_AN_COMPLETED) ?
			  AUTONEG_ENABLE : AUTONEG_DISABLE);

	switch (hw->phy.media_type) {
	case I40E_MEDIA_TYPE_BACKPLANE:
		ecmd->supported |= SUPPORTED_Backplane;
		ecmd->advertising |= ADVERTISED_Backplane;
		ecmd->port = PORT_NONE;
		break;
	case I40E_MEDIA_TYPE_BASET:
		ecmd->supported |= SUPPORTED_TP;
		ecmd->advertising |= ADVERTISED_TP;
		ecmd->port = PORT_TP;
		break;
	case I40E_MEDIA_TYPE_DA:
	case I40E_MEDIA_TYPE_CX4:
		ecmd->supported |= SUPPORTED_FIBRE;
		ecmd->advertising |= ADVERTISED_FIBRE;
		ecmd->port = PORT_DA;
		break;
	case I40E_MEDIA_TYPE_FIBER:
		ecmd->supported |= SUPPORTED_FIBRE;
		ecmd->advertising |= ADVERTISED_FIBRE;
		ecmd->port = PORT_FIBRE;
		break;
	case I40E_MEDIA_TYPE_UNKNOWN:
	default:
		ecmd->port = PORT_OTHER;
		break;
	}

	ecmd->transceiver = XCVR_EXTERNAL;

	if (link_up) {
		switch (link_speed) {
		case I40E_LINK_SPEED_40GB:
			/* need a SPEED_40000 in ethtool.h */
			ethtool_cmd_speed_set(ecmd, 40000);
			break;
		case I40E_LINK_SPEED_10GB:
			ethtool_cmd_speed_set(ecmd, SPEED_10000);
			break;
		default:
			break;
		}
		ecmd->duplex = DUPLEX_FULL;
	} else {
		ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
		ecmd->duplex = DUPLEX_UNKNOWN;
	}

	return 0;
}

/**
 * i40e_get_pauseparam -  Get Flow Control status
 * Return tx/rx-pause status
 **/
static void i40e_get_pauseparam(struct net_device *netdev,
				struct ethtool_pauseparam *pause)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	struct i40e_link_status *hw_link_info = &hw->phy.link_info;

	pause->autoneg =
		((hw_link_info->an_info & I40E_AQ_AN_COMPLETED) ?
		  AUTONEG_ENABLE : AUTONEG_DISABLE);

	if (hw->fc.current_mode == I40E_FC_RX_PAUSE) {
		pause->rx_pause = 1;
	} else if (hw->fc.current_mode == I40E_FC_TX_PAUSE) {
		pause->tx_pause = 1;
	} else if (hw->fc.current_mode == I40E_FC_FULL) {
		pause->rx_pause = 1;
		pause->tx_pause = 1;
	}
}

static u32 i40e_get_msglevel(struct net_device *netdev)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	return pf->msg_enable;
}

static void i40e_set_msglevel(struct net_device *netdev, u32 data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	if (I40E_DEBUG_USER & data)
		pf->hw.debug_mask = data;
	pf->msg_enable = data;
}

static int i40e_get_regs_len(struct net_device *netdev)
{
	int reg_count = 0;
	int i;

	for (i = 0; i40e_reg_list[i].offset != 0; i++)
		reg_count += i40e_reg_list[i].elements;

	return reg_count * sizeof(u32);
}

static void i40e_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
			  void *p)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	u32 *reg_buf = p;
	int i, j, ri;
	u32 reg;

	/* Tell ethtool which driver-version-specific regs output we have.
	 *
	 * At some point, if we have ethtool doing special formatting of
	 * this data, it will rely on this version number to know how to
	 * interpret things.  Hence, this needs to be updated if/when the
	 * diags register table is changed.
	 */
	regs->version = 1;

	/* loop through the diags reg table for what to print */
	ri = 0;
	for (i = 0; i40e_reg_list[i].offset != 0; i++) {
		for (j = 0; j < i40e_reg_list[i].elements; j++) {
			reg = i40e_reg_list[i].offset
				+ (j * i40e_reg_list[i].stride);
			reg_buf[ri++] = rd32(hw, reg);
		}
	}

}

static int i40e_get_eeprom(struct net_device *netdev,
			   struct ethtool_eeprom *eeprom, u8 *bytes)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_hw *hw = &np->vsi->back->hw;
	int first_word, last_word;
	u16 i, eeprom_len;
	u16 *eeprom_buff;
	int ret_val = 0;

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

	eeprom->magic = hw->vendor_id | (hw->device_id << 16);

	first_word = eeprom->offset >> 1;
	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
	eeprom_len = last_word - first_word + 1;

	eeprom_buff = kmalloc(sizeof(u16) * eeprom_len, GFP_KERNEL);
	if (!eeprom_buff)
		return -ENOMEM;

	ret_val = i40e_read_nvm_buffer(hw, first_word, &eeprom_len,
					   eeprom_buff);
	if (eeprom_len == 0) {
		kfree(eeprom_buff);
		return -EACCES;
	}

	/* Device's eeprom is always little-endian, word addressable */
	for (i = 0; i < eeprom_len; i++)
		le16_to_cpus(&eeprom_buff[i]);

	memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
	kfree(eeprom_buff);

	return ret_val;
}

static int i40e_get_eeprom_len(struct net_device *netdev)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_hw *hw = &np->vsi->back->hw;

	return hw->nvm.sr_size * 2;
}

static void i40e_get_drvinfo(struct net_device *netdev,
			     struct ethtool_drvinfo *drvinfo)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;

	strlcpy(drvinfo->driver, i40e_driver_name, sizeof(drvinfo->driver));
	strlcpy(drvinfo->version, i40e_driver_version_str,
		sizeof(drvinfo->version));
	strlcpy(drvinfo->fw_version, i40e_fw_version_str(&pf->hw),
		sizeof(drvinfo->fw_version));
	strlcpy(drvinfo->bus_info, pci_name(pf->pdev),
		sizeof(drvinfo->bus_info));
}

static void i40e_get_ringparam(struct net_device *netdev,
			       struct ethtool_ringparam *ring)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];

	ring->rx_max_pending = I40E_MAX_NUM_DESCRIPTORS;
	ring->tx_max_pending = I40E_MAX_NUM_DESCRIPTORS;
	ring->rx_mini_max_pending = 0;
	ring->rx_jumbo_max_pending = 0;
	ring->rx_pending = vsi->rx_rings[0]->count;
	ring->tx_pending = vsi->tx_rings[0]->count;
	ring->rx_mini_pending = 0;
	ring->rx_jumbo_pending = 0;
}

static int i40e_set_ringparam(struct net_device *netdev,
			      struct ethtool_ringparam *ring)
{
	struct i40e_ring *tx_rings = NULL, *rx_rings = NULL;
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	u32 new_rx_count, new_tx_count;
	int i, err = 0;

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

	if (ring->tx_pending > I40E_MAX_NUM_DESCRIPTORS ||
	    ring->tx_pending < I40E_MIN_NUM_DESCRIPTORS ||
	    ring->rx_pending > I40E_MAX_NUM_DESCRIPTORS ||
	    ring->rx_pending < I40E_MIN_NUM_DESCRIPTORS) {
		netdev_info(netdev,
			    "Descriptors requested (Tx: %d / Rx: %d) out of range [%d-%d]\n",
			    ring->tx_pending, ring->rx_pending,
			    I40E_MIN_NUM_DESCRIPTORS, I40E_MAX_NUM_DESCRIPTORS);
		return -EINVAL;
	}

	new_tx_count = ALIGN(ring->tx_pending, I40E_REQ_DESCRIPTOR_MULTIPLE);
	new_rx_count = ALIGN(ring->rx_pending, I40E_REQ_DESCRIPTOR_MULTIPLE);

	/* if nothing to do return success */
	if ((new_tx_count == vsi->tx_rings[0]->count) &&
	    (new_rx_count == vsi->rx_rings[0]->count))
		return 0;

	while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
		usleep_range(1000, 2000);

	if (!netif_running(vsi->netdev)) {
		/* simple case - set for the next time the netdev is started */
		for (i = 0; i < vsi->num_queue_pairs; i++) {
			vsi->tx_rings[i]->count = new_tx_count;
			vsi->rx_rings[i]->count = new_rx_count;
		}
		goto done;
	}

	/* We can't just free everything and then setup again,
	 * because the ISRs in MSI-X mode get passed pointers
	 * to the Tx and Rx ring structs.
	 */

	/* alloc updated Tx resources */
	if (new_tx_count != vsi->tx_rings[0]->count) {
		netdev_info(netdev,
			    "Changing Tx descriptor count from %d to %d.\n",
			    vsi->tx_rings[0]->count, new_tx_count);
		tx_rings = kcalloc(vsi->alloc_queue_pairs,
				   sizeof(struct i40e_ring), GFP_KERNEL);
		if (!tx_rings) {
			err = -ENOMEM;
			goto done;
		}

		for (i = 0; i < vsi->num_queue_pairs; i++) {
			/* clone ring and setup updated count */
			tx_rings[i] = *vsi->tx_rings[i];
			tx_rings[i].count = new_tx_count;
			err = i40e_setup_tx_descriptors(&tx_rings[i]);
			if (err) {
				while (i) {
					i--;
					i40e_free_tx_resources(&tx_rings[i]);
				}
				kfree(tx_rings);
				tx_rings = NULL;

				goto done;
			}
		}
	}

	/* alloc updated Rx resources */
	if (new_rx_count != vsi->rx_rings[0]->count) {
		netdev_info(netdev,
			    "Changing Rx descriptor count from %d to %d\n",
			    vsi->rx_rings[0]->count, new_rx_count);
		rx_rings = kcalloc(vsi->alloc_queue_pairs,
				   sizeof(struct i40e_ring), GFP_KERNEL);
		if (!rx_rings) {
			err = -ENOMEM;
			goto free_tx;
		}

		for (i = 0; i < vsi->num_queue_pairs; i++) {
			/* clone ring and setup updated count */
			rx_rings[i] = *vsi->rx_rings[i];
			rx_rings[i].count = new_rx_count;
			err = i40e_setup_rx_descriptors(&rx_rings[i]);
			if (err) {
				while (i) {
					i--;
					i40e_free_rx_resources(&rx_rings[i]);
				}
				kfree(rx_rings);
				rx_rings = NULL;

				goto free_tx;
			}
		}
	}

	/* Bring interface down, copy in the new ring info,
	 * then restore the interface
	 */
	i40e_down(vsi);

	if (tx_rings) {
		for (i = 0; i < vsi->num_queue_pairs; i++) {
			i40e_free_tx_resources(vsi->tx_rings[i]);
			*vsi->tx_rings[i] = tx_rings[i];
		}
		kfree(tx_rings);
		tx_rings = NULL;
	}

	if (rx_rings) {
		for (i = 0; i < vsi->num_queue_pairs; i++) {
			i40e_free_rx_resources(vsi->rx_rings[i]);
			*vsi->rx_rings[i] = rx_rings[i];
		}
		kfree(rx_rings);
		rx_rings = NULL;
	}

	i40e_up(vsi);

free_tx:
	/* error cleanup if the Rx allocations failed after getting Tx */
	if (tx_rings) {
		for (i = 0; i < vsi->num_queue_pairs; i++)
			i40e_free_tx_resources(&tx_rings[i]);
		kfree(tx_rings);
		tx_rings = NULL;
	}

done:
	clear_bit(__I40E_CONFIG_BUSY, &pf->state);

	return err;
}

static int i40e_get_sset_count(struct net_device *netdev, int sset)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;

	switch (sset) {
	case ETH_SS_TEST:
		return I40E_TEST_LEN;
	case ETH_SS_STATS:
		if (vsi == pf->vsi[pf->lan_vsi])
			return I40E_PF_STATS_LEN(netdev);
		else
			return I40E_VSI_STATS_LEN(netdev);
	default:
		return -EOPNOTSUPP;
	}
}

static void i40e_get_ethtool_stats(struct net_device *netdev,
				   struct ethtool_stats *stats, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	int i = 0;
	char *p;
	int j;
	struct rtnl_link_stats64 *net_stats = i40e_get_vsi_stats_struct(vsi);
	unsigned int start;

	i40e_update_stats(vsi);

	for (j = 0; j < I40E_NETDEV_STATS_LEN; j++) {
		p = (char *)net_stats + i40e_gstrings_net_stats[j].stat_offset;
		data[i++] = (i40e_gstrings_net_stats[j].sizeof_stat ==
			sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
	}
	rcu_read_lock();
	for (j = 0; j < vsi->num_queue_pairs; j++, i += 4) {
		struct i40e_ring *tx_ring = ACCESS_ONCE(vsi->tx_rings[j]);
		struct i40e_ring *rx_ring;

		if (!tx_ring)
			continue;

		/* process Tx ring statistics */
		do {
			start = u64_stats_fetch_begin_bh(&tx_ring->syncp);
			data[i] = tx_ring->stats.packets;
			data[i + 1] = tx_ring->stats.bytes;
		} while (u64_stats_fetch_retry_bh(&tx_ring->syncp, start));

		/* Rx ring is the 2nd half of the queue pair */
		rx_ring = &tx_ring[1];
		do {
			start = u64_stats_fetch_begin_bh(&rx_ring->syncp);
			data[i + 2] = rx_ring->stats.packets;
			data[i + 3] = rx_ring->stats.bytes;
		} while (u64_stats_fetch_retry_bh(&rx_ring->syncp, start));
	}
	rcu_read_unlock();
	if (vsi == pf->vsi[pf->lan_vsi]) {
		for (j = 0; j < I40E_GLOBAL_STATS_LEN; j++) {
			p = (char *)pf + i40e_gstrings_stats[j].stat_offset;
			data[i++] = (i40e_gstrings_stats[j].sizeof_stat ==
				   sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
		}
		for (j = 0; j < I40E_MAX_USER_PRIORITY; j++) {
			data[i++] = pf->stats.priority_xon_tx[j];
			data[i++] = pf->stats.priority_xoff_tx[j];
		}
		for (j = 0; j < I40E_MAX_USER_PRIORITY; j++) {
			data[i++] = pf->stats.priority_xon_rx[j];
			data[i++] = pf->stats.priority_xoff_rx[j];
		}
		for (j = 0; j < I40E_MAX_USER_PRIORITY; j++)
			data[i++] = pf->stats.priority_xon_2_xoff[j];
	}
}

static void i40e_get_strings(struct net_device *netdev, u32 stringset,
			     u8 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	char *p = (char *)data;
	int i;

	switch (stringset) {
	case ETH_SS_TEST:
		for (i = 0; i < I40E_TEST_LEN; i++) {
			memcpy(data, i40e_gstrings_test[i], ETH_GSTRING_LEN);
			data += ETH_GSTRING_LEN;
		}
		break;
	case ETH_SS_STATS:
		for (i = 0; i < I40E_NETDEV_STATS_LEN; i++) {
			snprintf(p, ETH_GSTRING_LEN, "%s",
				 i40e_gstrings_net_stats[i].stat_string);
			p += ETH_GSTRING_LEN;
		}
		for (i = 0; i < vsi->num_queue_pairs; i++) {
			snprintf(p, ETH_GSTRING_LEN, "tx-%u.tx_packets", i);
			p += ETH_GSTRING_LEN;
			snprintf(p, ETH_GSTRING_LEN, "tx-%u.tx_bytes", i);
			p += ETH_GSTRING_LEN;
			snprintf(p, ETH_GSTRING_LEN, "rx-%u.rx_packets", i);
			p += ETH_GSTRING_LEN;
			snprintf(p, ETH_GSTRING_LEN, "rx-%u.rx_bytes", i);
			p += ETH_GSTRING_LEN;
		}
		if (vsi == pf->vsi[pf->lan_vsi]) {
			for (i = 0; i < I40E_GLOBAL_STATS_LEN; i++) {
				snprintf(p, ETH_GSTRING_LEN, "port.%s",
					 i40e_gstrings_stats[i].stat_string);
				p += ETH_GSTRING_LEN;
			}
			for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
				snprintf(p, ETH_GSTRING_LEN,
					 "port.tx_priority_%u_xon", i);
				p += ETH_GSTRING_LEN;
				snprintf(p, ETH_GSTRING_LEN,
					 "port.tx_priority_%u_xoff", i);
				p += ETH_GSTRING_LEN;
			}
			for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
				snprintf(p, ETH_GSTRING_LEN,
					 "port.rx_priority_%u_xon", i);
				p += ETH_GSTRING_LEN;
				snprintf(p, ETH_GSTRING_LEN,
					 "port.rx_priority_%u_xoff", i);
				p += ETH_GSTRING_LEN;
			}
			for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
				snprintf(p, ETH_GSTRING_LEN,
					 "port.rx_priority_%u_xon_2_xoff", i);
				p += ETH_GSTRING_LEN;
			}
		}
		/* BUG_ON(p - data != I40E_STATS_LEN * ETH_GSTRING_LEN); */
		break;
	}
}

static int i40e_get_ts_info(struct net_device *dev,
			    struct ethtool_ts_info *info)
{
	return ethtool_op_get_ts_info(dev, info);
}

static int i40e_link_test(struct net_device *netdev, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	netif_info(pf, hw, netdev, "link test\n");
	if (i40e_get_link_status(&pf->hw))
		*data = 0;
	else
		*data = 1;

	return *data;
}

static int i40e_reg_test(struct net_device *netdev, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	netif_info(pf, hw, netdev, "register test\n");
	*data = i40e_diag_reg_test(&pf->hw);

	return *data;
}

static int i40e_eeprom_test(struct net_device *netdev, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	netif_info(pf, hw, netdev, "eeprom test\n");
	*data = i40e_diag_eeprom_test(&pf->hw);

	return *data;
}

static int i40e_intr_test(struct net_device *netdev, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	u16 swc_old = pf->sw_int_count;

	netif_info(pf, hw, netdev, "interrupt test\n");
	wr32(&pf->hw, I40E_PFINT_DYN_CTL0,
	     (I40E_PFINT_DYN_CTL0_INTENA_MASK |
	      I40E_PFINT_DYN_CTL0_SWINT_TRIG_MASK));
	usleep_range(1000, 2000);
	*data = (swc_old == pf->sw_int_count);

	return *data;
}

static int i40e_loopback_test(struct net_device *netdev, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	netif_info(pf, hw, netdev, "loopback test not implemented\n");
	*data = 0;

	return *data;
}

static void i40e_diag_test(struct net_device *netdev,
			   struct ethtool_test *eth_test, u64 *data)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;

	if (eth_test->flags == ETH_TEST_FL_OFFLINE) {
		/* Offline tests */
		netif_info(pf, drv, netdev, "offline testing starting\n");

		set_bit(__I40E_TESTING, &pf->state);

		/* Link test performed before hardware reset
		 * so autoneg doesn't interfere with test result
		 */
		if (i40e_link_test(netdev, &data[I40E_ETH_TEST_LINK]))
			eth_test->flags |= ETH_TEST_FL_FAILED;

		if (i40e_eeprom_test(netdev, &data[I40E_ETH_TEST_EEPROM]))
			eth_test->flags |= ETH_TEST_FL_FAILED;

		if (i40e_intr_test(netdev, &data[I40E_ETH_TEST_INTR]))
			eth_test->flags |= ETH_TEST_FL_FAILED;

		if (i40e_loopback_test(netdev, &data[I40E_ETH_TEST_LOOPBACK]))
			eth_test->flags |= ETH_TEST_FL_FAILED;

		/* run reg test last, a reset is required after it */
		if (i40e_reg_test(netdev, &data[I40E_ETH_TEST_REG]))
			eth_test->flags |= ETH_TEST_FL_FAILED;

		clear_bit(__I40E_TESTING, &pf->state);
		i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
	} else {
		/* Online tests */
		netif_info(pf, drv, netdev, "online testing starting\n");

		if (i40e_link_test(netdev, &data[I40E_ETH_TEST_LINK]))
			eth_test->flags |= ETH_TEST_FL_FAILED;

		/* Offline only tests, not run in online; pass by default */
		data[I40E_ETH_TEST_REG] = 0;
		data[I40E_ETH_TEST_EEPROM] = 0;
		data[I40E_ETH_TEST_INTR] = 0;
		data[I40E_ETH_TEST_LOOPBACK] = 0;
	}

	netif_info(pf, drv, netdev, "testing finished\n");
}

static void i40e_get_wol(struct net_device *netdev,
			 struct ethtool_wolinfo *wol)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	u16 wol_nvm_bits;

	/* NVM bit on means WoL disabled for the port */
	i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);
	if ((1 << hw->port) & wol_nvm_bits) {
		wol->supported = 0;
		wol->wolopts = 0;
	} else {
		wol->supported = WAKE_MAGIC;
		wol->wolopts = (pf->wol_en ? WAKE_MAGIC : 0);
	}
}

static int i40e_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	u16 wol_nvm_bits;

	/* NVM bit on means WoL disabled for the port */
	i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);
	if (((1 << hw->port) & wol_nvm_bits))
		return -EOPNOTSUPP;

	/* only magic packet is supported */
	if (wol->wolopts && (wol->wolopts != WAKE_MAGIC))
		return -EOPNOTSUPP;

	/* is this a new value? */
	if (pf->wol_en != !!wol->wolopts) {
		pf->wol_en = !!wol->wolopts;
		device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);
	}

	return 0;
}

static int i40e_nway_reset(struct net_device *netdev)
{
	/* restart autonegotiation */
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	i40e_status ret = 0;

	ret = i40e_aq_set_link_restart_an(hw, NULL);
	if (ret) {
		netdev_info(netdev, "link restart failed, aq_err=%d\n",
			    pf->hw.aq.asq_last_status);
		return -EIO;
	}

	return 0;
}

static int i40e_set_phys_id(struct net_device *netdev,
			    enum ethtool_phys_id_state state)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_pf *pf = np->vsi->back;
	struct i40e_hw *hw = &pf->hw;
	int blink_freq = 2;

	switch (state) {
	case ETHTOOL_ID_ACTIVE:
		pf->led_status = i40e_led_get(hw);
		return blink_freq;
	case ETHTOOL_ID_ON:
		i40e_led_set(hw, 0xF, false);
		break;
	case ETHTOOL_ID_OFF:
		i40e_led_set(hw, 0x0, false);
		break;
	case ETHTOOL_ID_INACTIVE:
		i40e_led_set(hw, pf->led_status, false);
		break;
	}

	return 0;
}

/* NOTE: i40e hardware uses a conversion factor of 2 for Interrupt
 * Throttle Rate (ITR) ie. ITR(1) = 2us ITR(10) = 20 us, and also
 * 125us (8000 interrupts per second) == ITR(62)
 */

static int i40e_get_coalesce(struct net_device *netdev,
			     struct ethtool_coalesce *ec)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;

	ec->tx_max_coalesced_frames_irq = vsi->work_limit;
	ec->rx_max_coalesced_frames_irq = vsi->work_limit;

	if (ITR_IS_DYNAMIC(vsi->rx_itr_setting))
		ec->rx_coalesce_usecs = 1;
	else
		ec->rx_coalesce_usecs = vsi->rx_itr_setting;

	if (ITR_IS_DYNAMIC(vsi->tx_itr_setting))
		ec->tx_coalesce_usecs = 1;
	else
		ec->tx_coalesce_usecs = vsi->tx_itr_setting;

	return 0;
}

static int i40e_set_coalesce(struct net_device *netdev,
			     struct ethtool_coalesce *ec)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_q_vector *q_vector;
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	struct i40e_hw *hw = &pf->hw;
	u16 vector;
	int i;

	if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
		vsi->work_limit = ec->tx_max_coalesced_frames_irq;

	switch (ec->rx_coalesce_usecs) {
	case 0:
		vsi->rx_itr_setting = 0;
		break;
	case 1:
		vsi->rx_itr_setting = (I40E_ITR_DYNAMIC |
				       ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
		break;
	default:
		if ((ec->rx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
		    (ec->rx_coalesce_usecs > (I40E_MAX_ITR << 1)))
			return -EINVAL;
		vsi->rx_itr_setting = ec->rx_coalesce_usecs;
		break;
	}

	switch (ec->tx_coalesce_usecs) {
	case 0:
		vsi->tx_itr_setting = 0;
		break;
	case 1:
		vsi->tx_itr_setting = (I40E_ITR_DYNAMIC |
				       ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
		break;
	default:
		if ((ec->tx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
		    (ec->tx_coalesce_usecs > (I40E_MAX_ITR << 1)))
			return -EINVAL;
		vsi->tx_itr_setting = ec->tx_coalesce_usecs;
		break;
	}

	vector = vsi->base_vector;
	for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
		q_vector = vsi->q_vectors[i];
		q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
		wr32(hw, I40E_PFINT_ITRN(0, vector - 1), q_vector->rx.itr);
		q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
		wr32(hw, I40E_PFINT_ITRN(1, vector - 1), q_vector->tx.itr);
		i40e_flush(hw);
	}

	return 0;
}

/**
 * i40e_get_rss_hash_opts - Get RSS hash Input Set for each flow type
 * @pf: pointer to the physical function struct
 * @cmd: ethtool rxnfc command
 *
 * Returns Success if the flow is supported, else Invalid Input.
 **/
static int i40e_get_rss_hash_opts(struct i40e_pf *pf, struct ethtool_rxnfc *cmd)
{
	cmd->data = 0;

	/* Report default options for RSS on i40e */
	switch (cmd->flow_type) {
	case TCP_V4_FLOW:
	case UDP_V4_FLOW:
		cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
	/* fall through to add IP fields */
	case SCTP_V4_FLOW:
	case AH_ESP_V4_FLOW:
	case AH_V4_FLOW:
	case ESP_V4_FLOW:
	case IPV4_FLOW:
		cmd->data |= RXH_IP_SRC | RXH_IP_DST;
		break;
	case TCP_V6_FLOW:
	case UDP_V6_FLOW:
		cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
	/* fall through to add IP fields */
	case SCTP_V6_FLOW:
	case AH_ESP_V6_FLOW:
	case AH_V6_FLOW:
	case ESP_V6_FLOW:
	case IPV6_FLOW:
		cmd->data |= RXH_IP_SRC | RXH_IP_DST;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

/**
 * i40e_get_rxnfc - command to get RX flow classification rules
 * @netdev: network interface device structure
 * @cmd: ethtool rxnfc command
 *
 * Returns Success if the command is supported.
 **/
static int i40e_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
			  u32 *rule_locs)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	int ret = -EOPNOTSUPP;

	switch (cmd->cmd) {
	case ETHTOOL_GRXRINGS:
		cmd->data = vsi->alloc_queue_pairs;
		ret = 0;
		break;
	case ETHTOOL_GRXFH:
		ret = i40e_get_rss_hash_opts(pf, cmd);
		break;
	case ETHTOOL_GRXCLSRLCNT:
		ret = 0;
		break;
	case ETHTOOL_GRXCLSRULE:
		ret = 0;
		break;
	case ETHTOOL_GRXCLSRLALL:
		cmd->data = 500;
		ret = 0;
	default:
		break;
	}

	return ret;
}

/**
 * i40e_set_rss_hash_opt - Enable/Disable flow types for RSS hash
 * @pf: pointer to the physical function struct
 * @cmd: ethtool rxnfc command
 *
 * Returns Success if the flow input set is supported.
 **/
static int i40e_set_rss_hash_opt(struct i40e_pf *pf, struct ethtool_rxnfc *nfc)
{
	struct i40e_hw *hw = &pf->hw;
	u64 hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
		   ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);

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

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

	switch (nfc->flow_type) {
	case TCP_V4_FLOW:
		switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
		case 0:
			hena &= ~((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_TCP);
			break;
		case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
			hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_TCP);
			break;
		default:
			return -EINVAL;
		}
		break;
	case TCP_V6_FLOW:
		switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
		case 0:
			hena &= ~((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_TCP);
			break;
		case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
			hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_TCP);
			break;
		default:
			return -EINVAL;
		}
		break;
	case UDP_V4_FLOW:
		switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
		case 0:
			hena &=
			~(((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP) |
			((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV4_UDP) |
			((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV4));
			break;
		case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
			hena |=
			(((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP)  |
			((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV4_UDP) |
			((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV4));
			break;
		default:
			return -EINVAL;
		}
		break;
	case UDP_V6_FLOW:
		switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
		case 0:
			hena &=
			~(((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP) |
			((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP) |
			((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV6));
			break;
		case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
			hena |=
			(((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP)  |
			((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP) |
			((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV6));
			break;
		default:
			return -EINVAL;
		}
		break;
	case AH_ESP_V4_FLOW:
	case AH_V4_FLOW:
	case ESP_V4_FLOW:
	case SCTP_V4_FLOW:
		if ((nfc->data & RXH_L4_B_0_1) ||
		    (nfc->data & RXH_L4_B_2_3))
			return -EINVAL;
		hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_OTHER);
		break;
	case AH_ESP_V6_FLOW:
	case AH_V6_FLOW:
	case ESP_V6_FLOW:
	case SCTP_V6_FLOW:
		if ((nfc->data & RXH_L4_B_0_1) ||
		    (nfc->data & RXH_L4_B_2_3))
			return -EINVAL;
		hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_OTHER);
		break;
	case IPV4_FLOW:
		hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_OTHER) |
			((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV4);
		break;
	case IPV6_FLOW:
		hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_OTHER) |
			((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV6);
		break;
	default:
		return -EINVAL;
	}

	wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
	wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
	i40e_flush(hw);

	return 0;
}

#define IP_HEADER_OFFSET 14
/**
 * i40e_add_del_fdir_udpv4 - Add/Remove UDPv4 Flow Director filters for
 * a specific flow spec
 * @vsi: pointer to the targeted VSI
 * @fd_data: the flow director data required from the FDir descriptor
 * @ethtool_rx_flow_spec: the flow spec
 * @add: true adds a filter, false removes it
 *
 * Returns 0 if the filters were successfully added or removed
 **/
static int i40e_add_del_fdir_udpv4(struct i40e_vsi *vsi,
				   struct i40e_fdir_data *fd_data,
				   struct ethtool_rx_flow_spec *fsp, bool add)
{
	struct i40e_pf *pf = vsi->back;
	struct udphdr *udp;
	struct iphdr *ip;
	bool err = false;
	int ret;
	int i;

	ip = (struct iphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET);
	udp = (struct udphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET
	      + sizeof(struct iphdr));

	ip->saddr = fsp->h_u.tcp_ip4_spec.ip4src;
	ip->daddr = fsp->h_u.tcp_ip4_spec.ip4dst;
	udp->source = fsp->h_u.tcp_ip4_spec.psrc;
	udp->dest = fsp->h_u.tcp_ip4_spec.pdst;

	for (i = I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP;
	     i <= I40E_FILTER_PCTYPE_NONF_IPV4_UDP; i++) {
		fd_data->pctype = i;
		ret = i40e_program_fdir_filter(fd_data, pf, add);

		if (ret) {
			dev_info(&pf->pdev->dev,
				 "Filter command send failed for PCTYPE %d (ret = %d)\n",
				 fd_data->pctype, ret);
			err = true;
		} else {
			dev_info(&pf->pdev->dev,
				 "Filter OK for PCTYPE %d (ret = %d)\n",
				 fd_data->pctype, ret);
		}
	}

	return err ? -EOPNOTSUPP : 0;
}

/**
 * i40e_add_del_fdir_tcpv4 - Add/Remove TCPv4 Flow Director filters for
 * a specific flow spec
 * @vsi: pointer to the targeted VSI
 * @fd_data: the flow director data required from the FDir descriptor
 * @ethtool_rx_flow_spec: the flow spec
 * @add: true adds a filter, false removes it
 *
 * Returns 0 if the filters were successfully added or removed
 **/
static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi,
				   struct i40e_fdir_data *fd_data,
				   struct ethtool_rx_flow_spec *fsp, bool add)
{
	struct i40e_pf *pf = vsi->back;
	struct tcphdr *tcp;
	struct iphdr *ip;
	bool err = false;
	int ret;

	ip = (struct iphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET);
	tcp = (struct tcphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET
	      + sizeof(struct iphdr));

	ip->daddr = fsp->h_u.tcp_ip4_spec.ip4dst;
	tcp->dest = fsp->h_u.tcp_ip4_spec.pdst;

	fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_TCP_SYN;
	ret = i40e_program_fdir_filter(fd_data, pf, add);

	if (ret) {
		dev_info(&pf->pdev->dev,
			 "Filter command send failed for PCTYPE %d (ret = %d)\n",
			 fd_data->pctype, ret);
		err = true;
	} else {
		dev_info(&pf->pdev->dev, "Filter OK for PCTYPE %d (ret = %d)\n",
			 fd_data->pctype, ret);
	}

	ip->saddr = fsp->h_u.tcp_ip4_spec.ip4src;
	tcp->source = fsp->h_u.tcp_ip4_spec.psrc;

	fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_TCP;

	ret = i40e_program_fdir_filter(fd_data, pf, add);
	if (ret) {
		dev_info(&pf->pdev->dev,
			 "Filter command send failed for PCTYPE %d (ret = %d)\n",
			 fd_data->pctype, ret);
		err = true;
	} else {
		dev_info(&pf->pdev->dev, "Filter OK for PCTYPE %d (ret = %d)\n",
			  fd_data->pctype, ret);
	}

	return err ? -EOPNOTSUPP : 0;
}

/**
 * i40e_add_del_fdir_sctpv4 - Add/Remove SCTPv4 Flow Director filters for
 * a specific flow spec
 * @vsi: pointer to the targeted VSI
 * @fd_data: the flow director data required from the FDir descriptor
 * @ethtool_rx_flow_spec: the flow spec
 * @add: true adds a filter, false removes it
 *
 * Returns 0 if the filters were successfully added or removed
 **/
static int i40e_add_del_fdir_sctpv4(struct i40e_vsi *vsi,
				    struct i40e_fdir_data *fd_data,
				    struct ethtool_rx_flow_spec *fsp, bool add)
{
	return -EOPNOTSUPP;
}

/**
 * i40e_add_del_fdir_ipv4 - Add/Remove IPv4 Flow Director filters for
 * a specific flow spec
 * @vsi: pointer to the targeted VSI
 * @fd_data: the flow director data required for the FDir descriptor
 * @fsp: the ethtool flow spec
 * @add: true adds a filter, false removes it
 *
 * Returns 0 if the filters were successfully added or removed
 **/
static int i40e_add_del_fdir_ipv4(struct i40e_vsi *vsi,
				  struct i40e_fdir_data *fd_data,
				  struct ethtool_rx_flow_spec *fsp, bool add)
{
	struct i40e_pf *pf = vsi->back;
	struct iphdr *ip;
	bool err = false;
	int ret;
	int i;

	ip = (struct iphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET);

	ip->saddr = fsp->h_u.usr_ip4_spec.ip4src;
	ip->daddr = fsp->h_u.usr_ip4_spec.ip4dst;
	ip->protocol = fsp->h_u.usr_ip4_spec.proto;

	for (i = I40E_FILTER_PCTYPE_NONF_IPV4_OTHER;
	     i <= I40E_FILTER_PCTYPE_FRAG_IPV4;	i++) {
		fd_data->pctype = i;
		ret = i40e_program_fdir_filter(fd_data, pf, add);

		if (ret) {
			dev_info(&pf->pdev->dev,
				 "Filter command send failed for PCTYPE %d (ret = %d)\n",
				 fd_data->pctype, ret);
			err = true;
		} else {
			dev_info(&pf->pdev->dev,
				 "Filter OK for PCTYPE %d (ret = %d)\n",
				 fd_data->pctype, ret);
		}
	}

	return err ? -EOPNOTSUPP : 0;
}

/**
 * i40e_add_del_fdir_ethtool - Add/Remove Flow Director filters for
 * a specific flow spec based on their protocol
 * @vsi: pointer to the targeted VSI
 * @cmd: command to get or set RX flow classification rules
 * @add: true adds a filter, false removes it
 *
 * Returns 0 if the filters were successfully added or removed
 **/
static int i40e_add_del_fdir_ethtool(struct i40e_vsi *vsi,
			struct ethtool_rxnfc *cmd, bool add)
{
	struct i40e_fdir_data fd_data;
	int ret = -EINVAL;
	struct i40e_pf *pf;
	struct ethtool_rx_flow_spec *fsp =
		(struct ethtool_rx_flow_spec *)&cmd->fs;

	if (!vsi)
		return -EINVAL;

	pf = vsi->back;

	if ((fsp->ring_cookie != RX_CLS_FLOW_DISC) &&
	    (fsp->ring_cookie >= vsi->num_queue_pairs))
		return -EINVAL;

	/* Populate the Flow Director that we have at the moment
	 * and allocate the raw packet buffer for the calling functions
	 */
	fd_data.raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_LOOKUP,
				     GFP_KERNEL);

	if (!fd_data.raw_packet) {
		dev_info(&pf->pdev->dev, "Could not allocate memory\n");
		return -ENOMEM;
	}

	fd_data.q_index = fsp->ring_cookie;
	fd_data.flex_off = 0;
	fd_data.pctype = 0;
	fd_data.dest_vsi = vsi->id;
	fd_data.dest_ctl = 0;
	fd_data.fd_status = 0;
	fd_data.cnt_index = 0;
	fd_data.fd_id = 0;

	switch (fsp->flow_type & ~FLOW_EXT) {
	case TCP_V4_FLOW:
		ret = i40e_add_del_fdir_tcpv4(vsi, &fd_data, fsp, add);
		break;
	case UDP_V4_FLOW:
		ret = i40e_add_del_fdir_udpv4(vsi, &fd_data, fsp, add);
		break;
	case SCTP_V4_FLOW:
		ret = i40e_add_del_fdir_sctpv4(vsi, &fd_data, fsp, add);
		break;
	case IPV4_FLOW:
		ret = i40e_add_del_fdir_ipv4(vsi, &fd_data, fsp, add);
		break;
	case IP_USER_FLOW:
		switch (fsp->h_u.usr_ip4_spec.proto) {
		case IPPROTO_TCP:
			ret = i40e_add_del_fdir_tcpv4(vsi, &fd_data, fsp, add);
			break;
		case IPPROTO_UDP:
			ret = i40e_add_del_fdir_udpv4(vsi, &fd_data, fsp, add);
			break;
		case IPPROTO_SCTP:
			ret = i40e_add_del_fdir_sctpv4(vsi, &fd_data, fsp, add);
			break;
		default:
			ret = i40e_add_del_fdir_ipv4(vsi, &fd_data, fsp, add);
			break;
		}
		break;
	default:
		dev_info(&pf->pdev->dev, "Could not specify spec type\n");
		ret = -EINVAL;
	}

	kfree(fd_data.raw_packet);
	fd_data.raw_packet = NULL;

	return ret;
}
/**
 * i40e_set_rxnfc - command to set RX flow classification rules
 * @netdev: network interface device structure
 * @cmd: ethtool rxnfc command
 *
 * Returns Success if the command is supported.
 **/
static int i40e_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
{
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	int ret = -EOPNOTSUPP;

	switch (cmd->cmd) {
	case ETHTOOL_SRXFH:
		ret = i40e_set_rss_hash_opt(pf, cmd);
		break;
	case ETHTOOL_SRXCLSRLINS:
		ret = i40e_add_del_fdir_ethtool(vsi, cmd, true);
		break;
	case ETHTOOL_SRXCLSRLDEL:
		ret = i40e_add_del_fdir_ethtool(vsi, cmd, false);
		break;
	default:
		break;
	}

	return ret;
}

/**
 * i40e_max_channels - get Max number of combined channels supported
 * @vsi: vsi pointer
 **/
static unsigned int i40e_max_channels(struct i40e_vsi *vsi)
{
	/* TODO: This code assumes DCB and FD is disabled for now. */
	return vsi->alloc_queue_pairs;
}

/**
 * i40e_get_channels - Get the current channels enabled and max supported etc.
 * @netdev: network interface device structure
 * @ch: ethtool channels structure
 *
 * We don't support separate tx and rx queues as channels. The other count
 * represents how many queues are being used for control. max_combined counts
 * how many queue pairs we can support. They may not be mapped 1 to 1 with
 * q_vectors since we support a lot more queue pairs than q_vectors.
 **/
static void i40e_get_channels(struct net_device *dev,
			       struct ethtool_channels *ch)
{
	struct i40e_netdev_priv *np = netdev_priv(dev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;

	/* report maximum channels */
	ch->max_combined = i40e_max_channels(vsi);

	/* report info for other vector */
	ch->other_count = (pf->flags & I40E_FLAG_FDIR_ENABLED) ? 1 : 0;
	ch->max_other = ch->other_count;

	/* Note: This code assumes DCB is disabled for now. */
	ch->combined_count = vsi->num_queue_pairs;
}

/**
 * i40e_set_channels - Set the new channels count.
 * @netdev: network interface device structure
 * @ch: ethtool channels structure
 *
 * The new channels count may not be the same as requested by the user
 * since it gets rounded down to a power of 2 value.
 **/
static int i40e_set_channels(struct net_device *dev,
			      struct ethtool_channels *ch)
{
	struct i40e_netdev_priv *np = netdev_priv(dev);
	unsigned int count = ch->combined_count;
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	int new_count;

	/* We do not support setting channels for any other VSI at present */
	if (vsi->type != I40E_VSI_MAIN)
		return -EINVAL;

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

	/* verify other_count has not changed */
	if (ch->other_count != ((pf->flags & I40E_FLAG_FDIR_ENABLED) ? 1 : 0))
		return -EINVAL;

	/* verify the number of channels does not exceed hardware limits */
	if (count > i40e_max_channels(vsi))
		return -EINVAL;

	/* update feature limits from largest to smallest supported values */
	/* TODO: Flow director limit, DCB etc */

	/* cap RSS limit */
	if (count > pf->rss_size_max)
		count = pf->rss_size_max;

	/* use rss_reconfig to rebuild with new queue count and update traffic
	 * class queue mapping
	 */
	new_count = i40e_reconfig_rss_queues(pf, count);
	if (new_count > 1)
		return 0;
	else
		return -EINVAL;
}

static const struct ethtool_ops i40e_ethtool_ops = {
	.get_settings		= i40e_get_settings,
	.get_drvinfo		= i40e_get_drvinfo,
	.get_regs_len		= i40e_get_regs_len,
	.get_regs		= i40e_get_regs,
	.nway_reset		= i40e_nway_reset,
	.get_link		= ethtool_op_get_link,
	.get_wol		= i40e_get_wol,
	.set_wol		= i40e_set_wol,
	.get_eeprom_len		= i40e_get_eeprom_len,
	.get_eeprom		= i40e_get_eeprom,
	.get_ringparam		= i40e_get_ringparam,
	.set_ringparam		= i40e_set_ringparam,
	.get_pauseparam		= i40e_get_pauseparam,
	.get_msglevel		= i40e_get_msglevel,
	.set_msglevel		= i40e_set_msglevel,
	.get_rxnfc		= i40e_get_rxnfc,
	.set_rxnfc		= i40e_set_rxnfc,
	.self_test		= i40e_diag_test,
	.get_strings		= i40e_get_strings,
	.set_phys_id		= i40e_set_phys_id,
	.get_sset_count		= i40e_get_sset_count,
	.get_ethtool_stats	= i40e_get_ethtool_stats,
	.get_coalesce		= i40e_get_coalesce,
	.set_coalesce		= i40e_set_coalesce,
	.get_channels		= i40e_get_channels,
	.set_channels		= i40e_set_channels,
	.get_ts_info		= i40e_get_ts_info,
};

void i40e_set_ethtool_ops(struct net_device *netdev)
{
	SET_ETHTOOL_OPS(netdev, &i40e_ethtool_ops);
}