drivers/net/ethernet/synopsys/dwc-xlgmac-ethtool.c - linux - Git at Google

 /* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
  *
  * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
  *
  * This program is dual-licensed; you may select either version 2 of
  * the GNU General Public License ("GPL") or BSD license ("BSD").
  *
  * This Synopsys DWC XLGMAC software driver and associated documentation
  * (hereinafter the "Software") is an unsupported proprietary work of
  * Synopsys, Inc. unless otherwise expressly agreed to in writing between
  * Synopsys and you. The Software IS NOT an item of Licensed Software or a
  * Licensed Product under any End User Software License Agreement or
  * Agreement for Licensed Products with Synopsys or any supplement thereto.
  * Synopsys is a registered trademark of Synopsys, Inc. Other names included
  * in the SOFTWARE may be the trademarks of their respective owners.
  */

 #include <linux/ethtool.h>
 #include <linux/kernel.h>
 #include <linux/netdevice.h>

 #include "dwc-xlgmac.h"
 #include "dwc-xlgmac-reg.h"

 struct xlgmac_stats_desc {
 	char stat_string[ETH_GSTRING_LEN];
 	int stat_offset;
 };

 #define XLGMAC_STAT(str, var)					\
 	{							\
 		str,						\
 		offsetof(struct xlgmac_pdata, stats.var),	\
 	}

 static const struct xlgmac_stats_desc xlgmac_gstring_stats[] = {
 	/* MMC TX counters */
 	XLGMAC_STAT("tx_bytes", txoctetcount_gb),
 	XLGMAC_STAT("tx_bytes_good", txoctetcount_g),
 	XLGMAC_STAT("tx_packets", txframecount_gb),
 	XLGMAC_STAT("tx_packets_good", txframecount_g),
 	XLGMAC_STAT("tx_unicast_packets", txunicastframes_gb),
 	XLGMAC_STAT("tx_broadcast_packets", txbroadcastframes_gb),
 	XLGMAC_STAT("tx_broadcast_packets_good", txbroadcastframes_g),
 	XLGMAC_STAT("tx_multicast_packets", txmulticastframes_gb),
 	XLGMAC_STAT("tx_multicast_packets_good", txmulticastframes_g),
 	XLGMAC_STAT("tx_vlan_packets_good", txvlanframes_g),
 	XLGMAC_STAT("tx_64_byte_packets", tx64octets_gb),
 	XLGMAC_STAT("tx_65_to_127_byte_packets", tx65to127octets_gb),
 	XLGMAC_STAT("tx_128_to_255_byte_packets", tx128to255octets_gb),
 	XLGMAC_STAT("tx_256_to_511_byte_packets", tx256to511octets_gb),
 	XLGMAC_STAT("tx_512_to_1023_byte_packets", tx512to1023octets_gb),
 	XLGMAC_STAT("tx_1024_to_max_byte_packets", tx1024tomaxoctets_gb),
 	XLGMAC_STAT("tx_underflow_errors", txunderflowerror),
 	XLGMAC_STAT("tx_pause_frames", txpauseframes),

 	/* MMC RX counters */
 	XLGMAC_STAT("rx_bytes", rxoctetcount_gb),
 	XLGMAC_STAT("rx_bytes_good", rxoctetcount_g),
 	XLGMAC_STAT("rx_packets", rxframecount_gb),
 	XLGMAC_STAT("rx_unicast_packets_good", rxunicastframes_g),
 	XLGMAC_STAT("rx_broadcast_packets_good", rxbroadcastframes_g),
 	XLGMAC_STAT("rx_multicast_packets_good", rxmulticastframes_g),
 	XLGMAC_STAT("rx_vlan_packets", rxvlanframes_gb),
 	XLGMAC_STAT("rx_64_byte_packets", rx64octets_gb),
 	XLGMAC_STAT("rx_65_to_127_byte_packets", rx65to127octets_gb),
 	XLGMAC_STAT("rx_128_to_255_byte_packets", rx128to255octets_gb),
 	XLGMAC_STAT("rx_256_to_511_byte_packets", rx256to511octets_gb),
 	XLGMAC_STAT("rx_512_to_1023_byte_packets", rx512to1023octets_gb),
 	XLGMAC_STAT("rx_1024_to_max_byte_packets", rx1024tomaxoctets_gb),
 	XLGMAC_STAT("rx_undersize_packets_good", rxundersize_g),
 	XLGMAC_STAT("rx_oversize_packets_good", rxoversize_g),
 	XLGMAC_STAT("rx_crc_errors", rxcrcerror),
 	XLGMAC_STAT("rx_crc_errors_small_packets", rxrunterror),
 	XLGMAC_STAT("rx_crc_errors_giant_packets", rxjabbererror),
 	XLGMAC_STAT("rx_length_errors", rxlengtherror),
 	XLGMAC_STAT("rx_out_of_range_errors", rxoutofrangetype),
 	XLGMAC_STAT("rx_fifo_overflow_errors", rxfifooverflow),
 	XLGMAC_STAT("rx_watchdog_errors", rxwatchdogerror),
 	XLGMAC_STAT("rx_pause_frames", rxpauseframes),

 	/* Extra counters */
 	XLGMAC_STAT("tx_tso_packets", tx_tso_packets),
 	XLGMAC_STAT("rx_split_header_packets", rx_split_header_packets),
 	XLGMAC_STAT("tx_process_stopped", tx_process_stopped),
 	XLGMAC_STAT("rx_process_stopped", rx_process_stopped),
 	XLGMAC_STAT("tx_buffer_unavailable", tx_buffer_unavailable),
 	XLGMAC_STAT("rx_buffer_unavailable", rx_buffer_unavailable),
 	XLGMAC_STAT("fatal_bus_error", fatal_bus_error),
 	XLGMAC_STAT("tx_vlan_packets", tx_vlan_packets),
 	XLGMAC_STAT("rx_vlan_packets", rx_vlan_packets),
 	XLGMAC_STAT("napi_poll_isr", napi_poll_isr),
 	XLGMAC_STAT("napi_poll_txtimer", napi_poll_txtimer),
 };

 #define XLGMAC_STATS_COUNT	ARRAY_SIZE(xlgmac_gstring_stats)

 static void xlgmac_ethtool_get_drvinfo(struct net_device *netdev,
 				       struct ethtool_drvinfo *drvinfo)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);
 	u32 ver = pdata->hw_feat.version;
 	u32 snpsver, devid, userver;

 	strlcpy(drvinfo->driver, pdata->drv_name, sizeof(drvinfo->driver));
 	strlcpy(drvinfo->version, pdata->drv_ver, sizeof(drvinfo->version));
 	strlcpy(drvinfo->bus_info, dev_name(pdata->dev),
 		sizeof(drvinfo->bus_info));
 	/* S|SNPSVER: Synopsys-defined Version
 	 * D|DEVID: Indicates the Device family
 	 * U|USERVER: User-defined Version
 	 */
 	snpsver = XLGMAC_GET_REG_BITS(ver, MAC_VR_SNPSVER_POS,
 				      MAC_VR_SNPSVER_LEN);
 	devid = XLGMAC_GET_REG_BITS(ver, MAC_VR_DEVID_POS,
 				    MAC_VR_DEVID_LEN);
 	userver = XLGMAC_GET_REG_BITS(ver, MAC_VR_USERVER_POS,
 				      MAC_VR_USERVER_LEN);
 	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
 		 "S.D.U: %x.%x.%x", snpsver, devid, userver);
 }

 static u32 xlgmac_ethtool_get_msglevel(struct net_device *netdev)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);

 	return pdata->msg_enable;
 }

 static void xlgmac_ethtool_set_msglevel(struct net_device *netdev,
 					u32 msglevel)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);

 	pdata->msg_enable = msglevel;
 }

 static void xlgmac_ethtool_get_channels(struct net_device *netdev,
 					struct ethtool_channels *channel)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);

 	channel->max_rx = XLGMAC_MAX_DMA_CHANNELS;
 	channel->max_tx = XLGMAC_MAX_DMA_CHANNELS;
 	channel->rx_count = pdata->rx_q_count;
 	channel->tx_count = pdata->tx_q_count;
 }

 static int xlgmac_ethtool_get_coalesce(struct net_device *netdev,
 				       struct ethtool_coalesce *ec)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);

 	memset(ec, 0, sizeof(struct ethtool_coalesce));
 	ec->rx_coalesce_usecs = pdata->rx_usecs;
 	ec->rx_max_coalesced_frames = pdata->rx_frames;
 	ec->tx_max_coalesced_frames = pdata->tx_frames;

 	return 0;
 }

 static int xlgmac_ethtool_set_coalesce(struct net_device *netdev,
 				       struct ethtool_coalesce *ec)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);
 	struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
 	unsigned int rx_frames, rx_riwt, rx_usecs;
 	unsigned int tx_frames;

 	/* Check for not supported parameters */
 	if ((ec->rx_coalesce_usecs_irq) || (ec->rx_max_coalesced_frames_irq) ||
 	    (ec->tx_coalesce_usecs) || (ec->tx_coalesce_usecs_high) ||
 	    (ec->tx_max_coalesced_frames_irq) || (ec->tx_coalesce_usecs_irq) ||
 	    (ec->stats_block_coalesce_usecs) ||  (ec->pkt_rate_low) ||
 	    (ec->use_adaptive_rx_coalesce) || (ec->use_adaptive_tx_coalesce) ||
 	    (ec->rx_max_coalesced_frames_low) || (ec->rx_coalesce_usecs_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_max_coalesced_frames_high) ||
 	    (ec->rate_sample_interval))
 		return -EOPNOTSUPP;

 	rx_usecs = ec->rx_coalesce_usecs;
 	rx_riwt = hw_ops->usec_to_riwt(pdata, rx_usecs);
 	rx_frames = ec->rx_max_coalesced_frames;
 	tx_frames = ec->tx_max_coalesced_frames;

 	if ((rx_riwt > XLGMAC_MAX_DMA_RIWT) ||
 	    (rx_riwt < XLGMAC_MIN_DMA_RIWT) ||
 	    (rx_frames > pdata->rx_desc_count))
 		return -EINVAL;

 	if (tx_frames > pdata->tx_desc_count)
 		return -EINVAL;

 	pdata->rx_riwt = rx_riwt;
 	pdata->rx_usecs = rx_usecs;
 	pdata->rx_frames = rx_frames;
 	hw_ops->config_rx_coalesce(pdata);

 	pdata->tx_frames = tx_frames;
 	hw_ops->config_tx_coalesce(pdata);

 	return 0;
 }

 static void xlgmac_ethtool_get_strings(struct net_device *netdev,
 				       u32 stringset, u8 *data)
 {
 	int i;

 	switch (stringset) {
 	case ETH_SS_STATS:
 		for (i = 0; i < XLGMAC_STATS_COUNT; i++) {
 			memcpy(data, xlgmac_gstring_stats[i].stat_string,
 			       ETH_GSTRING_LEN);
 			data += ETH_GSTRING_LEN;
 		}
 		break;
 	default:
 		WARN_ON(1);
 		break;
 	}
 }

 static int xlgmac_ethtool_get_sset_count(struct net_device *netdev,
 					 int stringset)
 {
 	int ret;

 	switch (stringset) {
 	case ETH_SS_STATS:
 		ret = XLGMAC_STATS_COUNT;
 		break;

 	default:
 		ret = -EOPNOTSUPP;
 	}

 	return ret;
 }

 static void xlgmac_ethtool_get_ethtool_stats(struct net_device *netdev,
 					     struct ethtool_stats *stats,
 					     u64 *data)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);
 	u8 *stat;
 	int i;

 	pdata->hw_ops.read_mmc_stats(pdata);
 	for (i = 0; i < XLGMAC_STATS_COUNT; i++) {
 		stat = (u8 *)pdata + xlgmac_gstring_stats[i].stat_offset;
 		*data++ = *(u64 *)stat;
 	}
 }

 static const struct ethtool_ops xlgmac_ethtool_ops = {
 	.get_drvinfo = xlgmac_ethtool_get_drvinfo,
 	.get_link = ethtool_op_get_link,
 	.get_msglevel = xlgmac_ethtool_get_msglevel,
 	.set_msglevel = xlgmac_ethtool_set_msglevel,
 	.get_channels = xlgmac_ethtool_get_channels,
 	.get_coalesce = xlgmac_ethtool_get_coalesce,
 	.set_coalesce = xlgmac_ethtool_set_coalesce,
 	.get_strings = xlgmac_ethtool_get_strings,
 	.get_sset_count = xlgmac_ethtool_get_sset_count,
 	.get_ethtool_stats = xlgmac_ethtool_get_ethtool_stats,
 };

 const struct ethtool_ops *xlgmac_get_ethtool_ops(void)
 {
 	return &xlgmac_ethtool_ops;
 }
	/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
	*
	* Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
	*
	* This program is dual-licensed; you may select either version 2 of
	* the GNU General Public License ("GPL") or BSD license ("BSD").
	*
	* This Synopsys DWC XLGMAC software driver and associated documentation
	* (hereinafter the "Software") is an unsupported proprietary work of
	* Synopsys, Inc. unless otherwise expressly agreed to in writing between
	* Synopsys and you. The Software IS NOT an item of Licensed Software or a
	* Licensed Product under any End User Software License Agreement or
	* Agreement for Licensed Products with Synopsys or any supplement thereto.
	* Synopsys is a registered trademark of Synopsys, Inc. Other names included
	* in the SOFTWARE may be the trademarks of their respective owners.
	*/

	#include <linux/ethtool.h>
	#include <linux/kernel.h>
	#include <linux/netdevice.h>

	#include "dwc-xlgmac.h"
	#include "dwc-xlgmac-reg.h"

	struct xlgmac_stats_desc {
	char stat_string[ETH_GSTRING_LEN];
	int stat_offset;
	};

	#define XLGMAC_STAT(str, var) \
	{ \
	str, \
	offsetof(struct xlgmac_pdata, stats.var), \
	}

	static const struct xlgmac_stats_desc xlgmac_gstring_stats[] = {
	/* MMC TX counters */
	XLGMAC_STAT("tx_bytes", txoctetcount_gb),
	XLGMAC_STAT("tx_bytes_good", txoctetcount_g),
	XLGMAC_STAT("tx_packets", txframecount_gb),
	XLGMAC_STAT("tx_packets_good", txframecount_g),
	XLGMAC_STAT("tx_unicast_packets", txunicastframes_gb),
	XLGMAC_STAT("tx_broadcast_packets", txbroadcastframes_gb),
	XLGMAC_STAT("tx_broadcast_packets_good", txbroadcastframes_g),
	XLGMAC_STAT("tx_multicast_packets", txmulticastframes_gb),
	XLGMAC_STAT("tx_multicast_packets_good", txmulticastframes_g),
	XLGMAC_STAT("tx_vlan_packets_good", txvlanframes_g),
	XLGMAC_STAT("tx_64_byte_packets", tx64octets_gb),
	XLGMAC_STAT("tx_65_to_127_byte_packets", tx65to127octets_gb),
	XLGMAC_STAT("tx_128_to_255_byte_packets", tx128to255octets_gb),
	XLGMAC_STAT("tx_256_to_511_byte_packets", tx256to511octets_gb),
	XLGMAC_STAT("tx_512_to_1023_byte_packets", tx512to1023octets_gb),
	XLGMAC_STAT("tx_1024_to_max_byte_packets", tx1024tomaxoctets_gb),
	XLGMAC_STAT("tx_underflow_errors", txunderflowerror),
	XLGMAC_STAT("tx_pause_frames", txpauseframes),

	/* MMC RX counters */
	XLGMAC_STAT("rx_bytes", rxoctetcount_gb),
	XLGMAC_STAT("rx_bytes_good", rxoctetcount_g),
	XLGMAC_STAT("rx_packets", rxframecount_gb),
	XLGMAC_STAT("rx_unicast_packets_good", rxunicastframes_g),
	XLGMAC_STAT("rx_broadcast_packets_good", rxbroadcastframes_g),
	XLGMAC_STAT("rx_multicast_packets_good", rxmulticastframes_g),
	XLGMAC_STAT("rx_vlan_packets", rxvlanframes_gb),
	XLGMAC_STAT("rx_64_byte_packets", rx64octets_gb),
	XLGMAC_STAT("rx_65_to_127_byte_packets", rx65to127octets_gb),
	XLGMAC_STAT("rx_128_to_255_byte_packets", rx128to255octets_gb),
	XLGMAC_STAT("rx_256_to_511_byte_packets", rx256to511octets_gb),
	XLGMAC_STAT("rx_512_to_1023_byte_packets", rx512to1023octets_gb),
	XLGMAC_STAT("rx_1024_to_max_byte_packets", rx1024tomaxoctets_gb),
	XLGMAC_STAT("rx_undersize_packets_good", rxundersize_g),
	XLGMAC_STAT("rx_oversize_packets_good", rxoversize_g),
	XLGMAC_STAT("rx_crc_errors", rxcrcerror),
	XLGMAC_STAT("rx_crc_errors_small_packets", rxrunterror),
	XLGMAC_STAT("rx_crc_errors_giant_packets", rxjabbererror),
	XLGMAC_STAT("rx_length_errors", rxlengtherror),
	XLGMAC_STAT("rx_out_of_range_errors", rxoutofrangetype),
	XLGMAC_STAT("rx_fifo_overflow_errors", rxfifooverflow),
	XLGMAC_STAT("rx_watchdog_errors", rxwatchdogerror),
	XLGMAC_STAT("rx_pause_frames", rxpauseframes),

	/* Extra counters */
	XLGMAC_STAT("tx_tso_packets", tx_tso_packets),
	XLGMAC_STAT("rx_split_header_packets", rx_split_header_packets),
	XLGMAC_STAT("tx_process_stopped", tx_process_stopped),
	XLGMAC_STAT("rx_process_stopped", rx_process_stopped),
	XLGMAC_STAT("tx_buffer_unavailable", tx_buffer_unavailable),
	XLGMAC_STAT("rx_buffer_unavailable", rx_buffer_unavailable),
	XLGMAC_STAT("fatal_bus_error", fatal_bus_error),
	XLGMAC_STAT("tx_vlan_packets", tx_vlan_packets),
	XLGMAC_STAT("rx_vlan_packets", rx_vlan_packets),
	XLGMAC_STAT("napi_poll_isr", napi_poll_isr),
	XLGMAC_STAT("napi_poll_txtimer", napi_poll_txtimer),
	};

	#define XLGMAC_STATS_COUNT ARRAY_SIZE(xlgmac_gstring_stats)

	static void xlgmac_ethtool_get_drvinfo(struct net_device *netdev,
	struct ethtool_drvinfo *drvinfo)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);
	u32 ver = pdata->hw_feat.version;
	u32 snpsver, devid, userver;

	strlcpy(drvinfo->driver, pdata->drv_name, sizeof(drvinfo->driver));
	strlcpy(drvinfo->version, pdata->drv_ver, sizeof(drvinfo->version));
	strlcpy(drvinfo->bus_info, dev_name(pdata->dev),
	sizeof(drvinfo->bus_info));
	/* S\|SNPSVER: Synopsys-defined Version
	* D\|DEVID: Indicates the Device family
	* U\|USERVER: User-defined Version
	*/
	snpsver = XLGMAC_GET_REG_BITS(ver, MAC_VR_SNPSVER_POS,
	MAC_VR_SNPSVER_LEN);
	devid = XLGMAC_GET_REG_BITS(ver, MAC_VR_DEVID_POS,
	MAC_VR_DEVID_LEN);
	userver = XLGMAC_GET_REG_BITS(ver, MAC_VR_USERVER_POS,
	MAC_VR_USERVER_LEN);
	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
	"S.D.U: %x.%x.%x", snpsver, devid, userver);
	}

	static u32 xlgmac_ethtool_get_msglevel(struct net_device *netdev)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);

	return pdata->msg_enable;
	}

	static void xlgmac_ethtool_set_msglevel(struct net_device *netdev,
	u32 msglevel)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);

	pdata->msg_enable = msglevel;
	}

	static void xlgmac_ethtool_get_channels(struct net_device *netdev,
	struct ethtool_channels *channel)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);

	channel->max_rx = XLGMAC_MAX_DMA_CHANNELS;
	channel->max_tx = XLGMAC_MAX_DMA_CHANNELS;
	channel->rx_count = pdata->rx_q_count;
	channel->tx_count = pdata->tx_q_count;
	}

	static int xlgmac_ethtool_get_coalesce(struct net_device *netdev,
	struct ethtool_coalesce *ec)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);

	memset(ec, 0, sizeof(struct ethtool_coalesce));
	ec->rx_coalesce_usecs = pdata->rx_usecs;
	ec->rx_max_coalesced_frames = pdata->rx_frames;
	ec->tx_max_coalesced_frames = pdata->tx_frames;

	return 0;
	}

	static int xlgmac_ethtool_set_coalesce(struct net_device *netdev,
	struct ethtool_coalesce *ec)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);
	struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
	unsigned int rx_frames, rx_riwt, rx_usecs;
	unsigned int tx_frames;

	/* Check for not supported parameters */
	if ((ec->rx_coalesce_usecs_irq) \|\| (ec->rx_max_coalesced_frames_irq) \|\|
	(ec->tx_coalesce_usecs) \|\| (ec->tx_coalesce_usecs_high) \|\|
	(ec->tx_max_coalesced_frames_irq) \|\| (ec->tx_coalesce_usecs_irq) \|\|
	(ec->stats_block_coalesce_usecs) \|\| (ec->pkt_rate_low) \|\|
	(ec->use_adaptive_rx_coalesce) \|\| (ec->use_adaptive_tx_coalesce) \|\|
	(ec->rx_max_coalesced_frames_low) \|\| (ec->rx_coalesce_usecs_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_max_coalesced_frames_high) \|\|
	(ec->rate_sample_interval))
	return -EOPNOTSUPP;

	rx_usecs = ec->rx_coalesce_usecs;
	rx_riwt = hw_ops->usec_to_riwt(pdata, rx_usecs);
	rx_frames = ec->rx_max_coalesced_frames;
	tx_frames = ec->tx_max_coalesced_frames;

	if ((rx_riwt > XLGMAC_MAX_DMA_RIWT) \|\|
	(rx_riwt < XLGMAC_MIN_DMA_RIWT) \|\|
	(rx_frames > pdata->rx_desc_count))
	return -EINVAL;

	if (tx_frames > pdata->tx_desc_count)
	return -EINVAL;

	pdata->rx_riwt = rx_riwt;
	pdata->rx_usecs = rx_usecs;
	pdata->rx_frames = rx_frames;
	hw_ops->config_rx_coalesce(pdata);

	pdata->tx_frames = tx_frames;
	hw_ops->config_tx_coalesce(pdata);

	return 0;
	}

	static void xlgmac_ethtool_get_strings(struct net_device *netdev,
	u32 stringset, u8 *data)
	{
	int i;

	switch (stringset) {
	case ETH_SS_STATS:
	for (i = 0; i < XLGMAC_STATS_COUNT; i++) {
	memcpy(data, xlgmac_gstring_stats[i].stat_string,
	ETH_GSTRING_LEN);
	data += ETH_GSTRING_LEN;
	}
	break;
	default:
	WARN_ON(1);
	break;
	}
	}

	static int xlgmac_ethtool_get_sset_count(struct net_device *netdev,
	int stringset)
	{
	int ret;

	switch (stringset) {
	case ETH_SS_STATS:
	ret = XLGMAC_STATS_COUNT;
	break;

	default:
	ret = -EOPNOTSUPP;
	}

	return ret;
	}

	static void xlgmac_ethtool_get_ethtool_stats(struct net_device *netdev,
	struct ethtool_stats *stats,
	u64 *data)
	{
	struct xlgmac_pdata *pdata = netdev_priv(netdev);
	u8 *stat;
	int i;

	pdata->hw_ops.read_mmc_stats(pdata);
	for (i = 0; i < XLGMAC_STATS_COUNT; i++) {
	stat = (u8 *)pdata + xlgmac_gstring_stats[i].stat_offset;
	data++ = (u64 *)stat;
	}
	}

	static const struct ethtool_ops xlgmac_ethtool_ops = {
	.get_drvinfo = xlgmac_ethtool_get_drvinfo,
	.get_link = ethtool_op_get_link,
	.get_msglevel = xlgmac_ethtool_get_msglevel,
	.set_msglevel = xlgmac_ethtool_set_msglevel,
	.get_channels = xlgmac_ethtool_get_channels,
	.get_coalesce = xlgmac_ethtool_get_coalesce,
	.set_coalesce = xlgmac_ethtool_set_coalesce,
	.get_strings = xlgmac_ethtool_get_strings,
	.get_sset_count = xlgmac_ethtool_get_sset_count,
	.get_ethtool_stats = xlgmac_ethtool_get_ethtool_stats,
	};

	const struct ethtool_ops *xlgmac_get_ethtool_ops(void)
	{
	return &xlgmac_ethtool_ops;
	}