text: /*
   * Copyright 2015 Amazon.com, Inc. or its affiliates.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #include <linux/pci.h>
  
  #include "ena_netdev.h"
  
  struct ena_stats {
  	char name[ETH_GSTRING_LEN];
  	int stat_offset;
  };
  
  #define ENA_STAT_ENA_COM_ENTRY(stat) { \
  	.name = #stat, \
  	.stat_offset = offsetof(struct ena_com_stats_admin, stat) \
  }
  
  #define ENA_STAT_ENTRY(stat, stat_type) { \
  	.name = #stat, \
  	.stat_offset = offsetof(struct ena_stats_##stat_type, stat) \
  }
  
  #define ENA_STAT_RX_ENTRY(stat) \
  	ENA_STAT_ENTRY(stat, rx)
  
  #define ENA_STAT_TX_ENTRY(stat) \
  	ENA_STAT_ENTRY(stat, tx)
  
  #define ENA_STAT_GLOBAL_ENTRY(stat) \
  	ENA_STAT_ENTRY(stat, dev)
  
  static const struct ena_stats ena_stats_global_strings[] = {
  	ENA_STAT_GLOBAL_ENTRY(tx_timeout),
  	ENA_STAT_GLOBAL_ENTRY(suspend),
  	ENA_STAT_GLOBAL_ENTRY(resume),
  	ENA_STAT_GLOBAL_ENTRY(wd_expired),
  	ENA_STAT_GLOBAL_ENTRY(interface_up),
  	ENA_STAT_GLOBAL_ENTRY(interface_down),
  	ENA_STAT_GLOBAL_ENTRY(admin_q_pause),
  };
  
  static const struct ena_stats ena_stats_tx_strings[] = {
  	ENA_STAT_TX_ENTRY(cnt),
  	ENA_STAT_TX_ENTRY(bytes),
  	ENA_STAT_TX_ENTRY(queue_stop),
  	ENA_STAT_TX_ENTRY(queue_wakeup),
  	ENA_STAT_TX_ENTRY(dma_mapping_err),
  	ENA_STAT_TX_ENTRY(linearize),
  	ENA_STAT_TX_ENTRY(linearize_failed),
  	ENA_STAT_TX_ENTRY(napi_comp),
  	ENA_STAT_TX_ENTRY(tx_poll),
  	ENA_STAT_TX_ENTRY(doorbells),
  	ENA_STAT_TX_ENTRY(prepare_ctx_err),
  	ENA_STAT_TX_ENTRY(bad_req_id),
  	ENA_STAT_TX_ENTRY(missed_tx),
  };
  
  static const struct ena_stats ena_stats_rx_strings[] = {
  	ENA_STAT_RX_ENTRY(cnt),
  	ENA_STAT_RX_ENTRY(bytes),
  	ENA_STAT_RX_ENTRY(refil_partial),
  	ENA_STAT_RX_ENTRY(bad_csum),
  	ENA_STAT_RX_ENTRY(page_alloc_fail),
  	ENA_STAT_RX_ENTRY(skb_alloc_fail),
  	ENA_STAT_RX_ENTRY(dma_mapping_err),
  	ENA_STAT_RX_ENTRY(bad_desc_num),
  	ENA_STAT_RX_ENTRY(rx_copybreak_pkt),
  	ENA_STAT_RX_ENTRY(bad_req_id),
  	ENA_STAT_RX_ENTRY(empty_rx_ring),
  };
  
  static const struct ena_stats ena_stats_ena_com_strings[] = {
  	ENA_STAT_ENA_COM_ENTRY(aborted_cmd),
  	ENA_STAT_ENA_COM_ENTRY(submitted_cmd),
  	ENA_STAT_ENA_COM_ENTRY(completed_cmd),
  	ENA_STAT_ENA_COM_ENTRY(out_of_space),
  	ENA_STAT_ENA_COM_ENTRY(no_completion),
  };
  
  #define ENA_STATS_ARRAY_GLOBAL	ARRAY_SIZE(ena_stats_global_strings)
  #define ENA_STATS_ARRAY_TX	ARRAY_SIZE(ena_stats_tx_strings)
  #define ENA_STATS_ARRAY_RX	ARRAY_SIZE(ena_stats_rx_strings)
  #define ENA_STATS_ARRAY_ENA_COM	ARRAY_SIZE(ena_stats_ena_com_strings)
  
  static void ena_safe_update_stat(u64 *src, u64 *dst,
  				 struct u64_stats_sync *syncp)
  {
  	unsigned int start;
  
  	do {
  		start = u64_stats_fetch_begin_irq(syncp);
  		*(dst) = *src;
  	} while (u64_stats_fetch_retry_irq(syncp, start));
  }
  
  static void ena_queue_stats(struct ena_adapter *adapter, u64 **data)
  {
  	const struct ena_stats *ena_stats;
  	struct ena_ring *ring;
  
  	u64 *ptr;
  	int i, j;
  
  	for (i = 0; i < adapter->num_queues; i++) {
  		/* Tx stats */
  		ring = &adapter->tx_ring[i];
  
  		for (j = 0; j < ENA_STATS_ARRAY_TX; j++) {
  			ena_stats = &ena_stats_tx_strings[j];
  
  			ptr = (u64 *)((uintptr_t)&ring->tx_stats +
  				(uintptr_t)ena_stats->stat_offset);
  
  			ena_safe_update_stat(ptr, (*data)++, &ring->syncp);
  		}
  
  		/* Rx stats */
  		ring = &adapter->rx_ring[i];
  
  		for (j = 0; j < ENA_STATS_ARRAY_RX; j++) {
  			ena_stats = &ena_stats_rx_strings[j];
  
  			ptr = (u64 *)((uintptr_t)&ring->rx_stats +
  				(uintptr_t)ena_stats->stat_offset);
  
  			ena_safe_update_stat(ptr, (*data)++, &ring->syncp);
  		}
  	}
  }
  
  static void ena_dev_admin_queue_stats(struct ena_adapter *adapter, u64 **data)
  {
  	const struct ena_stats *ena_stats;
  	u32 *ptr;
  	int i;
  
  	for (i = 0; i < ENA_STATS_ARRAY_ENA_COM; i++) {
  		ena_stats = &ena_stats_ena_com_strings[i];
  
  		ptr = (u32 *)((uintptr_t)&adapter->ena_dev->admin_queue.stats +
  			(uintptr_t)ena_stats->stat_offset);
  
  		*(*data)++ = *ptr;
  	}
  }
  
  static void ena_get_ethtool_stats(struct net_device *netdev,
  				  struct ethtool_stats *stats,
  				  u64 *data)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	const struct ena_stats *ena_stats;
  	u64 *ptr;
  	int i;
  
  	for (i = 0; i < ENA_STATS_ARRAY_GLOBAL; i++) {
  		ena_stats = &ena_stats_global_strings[i];
  
  		ptr = (u64 *)((uintptr_t)&adapter->dev_stats +
  			(uintptr_t)ena_stats->stat_offset);
  
  		ena_safe_update_stat(ptr, data++, &adapter->syncp);
  	}
  
  	ena_queue_stats(adapter, &data);
  	ena_dev_admin_queue_stats(adapter, &data);
  }
  
  int ena_get_sset_count(struct net_device *netdev, int sset)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  
  	if (sset != ETH_SS_STATS)
  		return -EOPNOTSUPP;
  
  	return  adapter->num_queues * (ENA_STATS_ARRAY_TX + ENA_STATS_ARRAY_RX)
  		+ ENA_STATS_ARRAY_GLOBAL + ENA_STATS_ARRAY_ENA_COM;
  }
  
  static void ena_queue_strings(struct ena_adapter *adapter, u8 **data)
  {
  	const struct ena_stats *ena_stats;
  	int i, j;
  
  	for (i = 0; i < adapter->num_queues; i++) {
  		/* Tx stats */
  		for (j = 0; j < ENA_STATS_ARRAY_TX; j++) {
  			ena_stats = &ena_stats_tx_strings[j];
  
  			snprintf(*data, ETH_GSTRING_LEN,
  				 "queue_%u_tx_%s", i, ena_stats->name);
  			 (*data) += ETH_GSTRING_LEN;
  		}
  		/* Rx stats */
  		for (j = 0; j < ENA_STATS_ARRAY_RX; j++) {
  			ena_stats = &ena_stats_rx_strings[j];
  
  			snprintf(*data, ETH_GSTRING_LEN,
  				 "queue_%u_rx_%s", i, ena_stats->name);
  			(*data) += ETH_GSTRING_LEN;
  		}
  	}
  }
  
  static void ena_com_dev_strings(u8 **data)
  {
  	const struct ena_stats *ena_stats;
  	int i;
  
  	for (i = 0; i < ENA_STATS_ARRAY_ENA_COM; i++) {
  		ena_stats = &ena_stats_ena_com_strings[i];
  
  		snprintf(*data, ETH_GSTRING_LEN,
  			 "ena_admin_q_%s", ena_stats->name);
  		(*data) += ETH_GSTRING_LEN;
  	}
  }
  
  static void ena_get_strings(struct net_device *netdev, u32 sset, u8 *data)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	const struct ena_stats *ena_stats;
  	int i;
  
  	if (sset != ETH_SS_STATS)
  		return;
  
  	for (i = 0; i < ENA_STATS_ARRAY_GLOBAL; i++) {
  		ena_stats = &ena_stats_global_strings[i];
  
  		memcpy(data, ena_stats->name, ETH_GSTRING_LEN);
  		data += ETH_GSTRING_LEN;
  	}
  
  	ena_queue_strings(adapter, &data);
  	ena_com_dev_strings(&data);
  }
  
  static int ena_get_link_ksettings(struct net_device *netdev,
  				  struct ethtool_link_ksettings *link_ksettings)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	struct ena_com_dev *ena_dev = adapter->ena_dev;
  	struct ena_admin_get_feature_link_desc *link;
  	struct ena_admin_get_feat_resp feat_resp;
  	int rc;
  
  	rc = ena_com_get_link_params(ena_dev, &feat_resp);
  	if (rc)
  		return rc;
  
  	link = &feat_resp.u.link;
  	link_ksettings->base.speed = link->speed;
  
  	if (link->flags & ENA_ADMIN_GET_FEATURE_LINK_DESC_AUTONEG_MASK) {
  		ethtool_link_ksettings_add_link_mode(link_ksettings,
  						     supported, Autoneg);
  		ethtool_link_ksettings_add_link_mode(link_ksettings,
  						     supported, Autoneg);
  	}
  
  	link_ksettings->base.autoneg =
  		(link->flags & ENA_ADMIN_GET_FEATURE_LINK_DESC_AUTONEG_MASK) ?
  		AUTONEG_ENABLE : AUTONEG_DISABLE;
  
  	link_ksettings->base.duplex = DUPLEX_FULL;
  
  	return 0;
  }
  
  static int ena_get_coalesce(struct net_device *net_dev,
  			    struct ethtool_coalesce *coalesce)
  {
  	struct ena_adapter *adapter = netdev_priv(net_dev);
  	struct ena_com_dev *ena_dev = adapter->ena_dev;
  	struct ena_intr_moder_entry intr_moder_entry;
  
  	if (!ena_com_interrupt_moderation_supported(ena_dev)) {
  		/* the devie doesn't support interrupt moderation */
  		return -EOPNOTSUPP;
  	}
  	coalesce->tx_coalesce_usecs =
  		ena_com_get_nonadaptive_moderation_interval_tx(ena_dev) /
  			ena_dev->intr_delay_resolution;
  	if (!ena_com_get_adaptive_moderation_enabled(ena_dev)) {
  		coalesce->rx_coalesce_usecs =
  			ena_com_get_nonadaptive_moderation_interval_rx(ena_dev)
  			/ ena_dev->intr_delay_resolution;
  	} else {
  		ena_com_get_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_LOWEST, &intr_moder_entry);
  		coalesce->rx_coalesce_usecs_low = intr_moder_entry.intr_moder_interval;
  		coalesce->rx_max_coalesced_frames_low = intr_moder_entry.pkts_per_interval;
  
  		ena_com_get_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_MID, &intr_moder_entry);
  		coalesce->rx_coalesce_usecs = intr_moder_entry.intr_moder_interval;
  		coalesce->rx_max_coalesced_frames = intr_moder_entry.pkts_per_interval;
  
  		ena_com_get_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_HIGHEST, &intr_moder_entry);
  		coalesce->rx_coalesce_usecs_high = intr_moder_entry.intr_moder_interval;
  		coalesce->rx_max_coalesced_frames_high = intr_moder_entry.pkts_per_interval;
  	}
  	coalesce->use_adaptive_rx_coalesce =
  		ena_com_get_adaptive_moderation_enabled(ena_dev);
  
  	return 0;
  }
  
  static void ena_update_tx_rings_intr_moderation(struct ena_adapter *adapter)
  {
  	unsigned int val;
  	int i;
  
  	val = ena_com_get_nonadaptive_moderation_interval_tx(adapter->ena_dev);
  
  	for (i = 0; i < adapter->num_queues; i++)
  		adapter->tx_ring[i].smoothed_interval = val;
  }
  
  static int ena_set_coalesce(struct net_device *net_dev,
  			    struct ethtool_coalesce *coalesce)
  {
  	struct ena_adapter *adapter = netdev_priv(net_dev);
  	struct ena_com_dev *ena_dev = adapter->ena_dev;
  	struct ena_intr_moder_entry intr_moder_entry;
  	int rc;
  
  	if (!ena_com_interrupt_moderation_supported(ena_dev)) {
  		/* the devie doesn't support interrupt moderation */
  		return -EOPNOTSUPP;
  	}
  
  	if (coalesce->rx_coalesce_usecs_irq ||
  	    coalesce->rx_max_coalesced_frames_irq ||
  	    coalesce->tx_coalesce_usecs_irq ||
  	    coalesce->tx_max_coalesced_frames ||
  	    coalesce->tx_max_coalesced_frames_irq ||
  	    coalesce->stats_block_coalesce_usecs ||
  	    coalesce->use_adaptive_tx_coalesce ||
  	    coalesce->pkt_rate_low ||
  	    coalesce->tx_coalesce_usecs_low ||
  	    coalesce->tx_max_coalesced_frames_low ||
  	    coalesce->pkt_rate_high ||
  	    coalesce->tx_coalesce_usecs_high ||
  	    coalesce->tx_max_coalesced_frames_high ||
  	    coalesce->rate_sample_interval)
  		return -EINVAL;
  
  	rc = ena_com_update_nonadaptive_moderation_interval_tx(ena_dev,
  							       coalesce->tx_coalesce_usecs);
  	if (rc)
  		return rc;
  
  	ena_update_tx_rings_intr_moderation(adapter);
  
  	if (ena_com_get_adaptive_moderation_enabled(ena_dev)) {
  		if (!coalesce->use_adaptive_rx_coalesce) {
  			ena_com_disable_adaptive_moderation(ena_dev);
  			rc = ena_com_update_nonadaptive_moderation_interval_rx(ena_dev,
  									       coalesce->rx_coalesce_usecs);
  			return rc;
  		}
  	} else { /* was in non-adaptive mode */
  		if (coalesce->use_adaptive_rx_coalesce) {
  			ena_com_enable_adaptive_moderation(ena_dev);
  		} else {
  			rc = ena_com_update_nonadaptive_moderation_interval_rx(ena_dev,
  									       coalesce->rx_coalesce_usecs);
  			return rc;
  		}
  	}
  
  	intr_moder_entry.intr_moder_interval = coalesce->rx_coalesce_usecs_low;
  	intr_moder_entry.pkts_per_interval = coalesce->rx_max_coalesced_frames_low;
  	intr_moder_entry.bytes_per_interval = ENA_INTR_BYTE_COUNT_NOT_SUPPORTED;
  	ena_com_init_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_LOWEST, &intr_moder_entry);
  
  	intr_moder_entry.intr_moder_interval = coalesce->rx_coalesce_usecs;
  	intr_moder_entry.pkts_per_interval = coalesce->rx_max_coalesced_frames;
  	intr_moder_entry.bytes_per_interval = ENA_INTR_BYTE_COUNT_NOT_SUPPORTED;
  	ena_com_init_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_MID, &intr_moder_entry);
  
  	intr_moder_entry.intr_moder_interval = coalesce->rx_coalesce_usecs_high;
  	intr_moder_entry.pkts_per_interval = coalesce->rx_max_coalesced_frames_high;
  	intr_moder_entry.bytes_per_interval = ENA_INTR_BYTE_COUNT_NOT_SUPPORTED;
  	ena_com_init_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_HIGHEST, &intr_moder_entry);
  
  	return 0;
  }
  
  static u32 ena_get_msglevel(struct net_device *netdev)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  
  	return adapter->msg_enable;
  }
  
  static void ena_set_msglevel(struct net_device *netdev, u32 value)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  
  	adapter->msg_enable = value;
  }
  
  static void ena_get_drvinfo(struct net_device *dev,
  			    struct ethtool_drvinfo *info)
  {
  	struct ena_adapter *adapter = netdev_priv(dev);
  
  	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
  	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
  	strlcpy(info->bus_info, pci_name(adapter->pdev),
  		sizeof(info->bus_info));
  }
  
  static void ena_get_ringparam(struct net_device *netdev,
  			      struct ethtool_ringparam *ring)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	struct ena_ring *tx_ring = &adapter->tx_ring[0];
  	struct ena_ring *rx_ring = &adapter->rx_ring[0];
  
  	ring->rx_max_pending = rx_ring->ring_size;
  	ring->tx_max_pending = tx_ring->ring_size;
  	ring->rx_pending = rx_ring->ring_size;
  	ring->tx_pending = tx_ring->ring_size;
  }
  
  static u32 ena_flow_hash_to_flow_type(u16 hash_fields)
  {
  	u32 data = 0;
  
  	if (hash_fields & ENA_ADMIN_RSS_L2_DA)
  		data |= RXH_L2DA;
  
  	if (hash_fields & ENA_ADMIN_RSS_L3_DA)
  		data |= RXH_IP_DST;
  
  	if (hash_fields & ENA_ADMIN_RSS_L3_SA)
  		data |= RXH_IP_SRC;
  
  	if (hash_fields & ENA_ADMIN_RSS_L4_DP)
  		data |= RXH_L4_B_2_3;
  
  	if (hash_fields & ENA_ADMIN_RSS_L4_SP)
  		data |= RXH_L4_B_0_1;
  
  	return data;
  }
  
  static u16 ena_flow_data_to_flow_hash(u32 hash_fields)
  {
  	u16 data = 0;
  
  	if (hash_fields & RXH_L2DA)
  		data |= ENA_ADMIN_RSS_L2_DA;
  
  	if (hash_fields & RXH_IP_DST)
  		data |= ENA_ADMIN_RSS_L3_DA;
  
  	if (hash_fields & RXH_IP_SRC)
  		data |= ENA_ADMIN_RSS_L3_SA;
  
  	if (hash_fields & RXH_L4_B_2_3)
  		data |= ENA_ADMIN_RSS_L4_DP;
  
  	if (hash_fields & RXH_L4_B_0_1)
  		data |= ENA_ADMIN_RSS_L4_SP;
  
  	return data;
  }
  
  static int ena_get_rss_hash(struct ena_com_dev *ena_dev,
  			    struct ethtool_rxnfc *cmd)
  {
  	enum ena_admin_flow_hash_proto proto;
  	u16 hash_fields;
  	int rc;
  
  	cmd->data = 0;
  
  	switch (cmd->flow_type) {
  	case TCP_V4_FLOW:
  		proto = ENA_ADMIN_RSS_TCP4;
  		break;
  	case UDP_V4_FLOW:
  		proto = ENA_ADMIN_RSS_UDP4;
  		break;
  	case TCP_V6_FLOW:
  		proto = ENA_ADMIN_RSS_TCP6;
  		break;
  	case UDP_V6_FLOW:
  		proto = ENA_ADMIN_RSS_UDP6;
  		break;
  	case IPV4_FLOW:
  		proto = ENA_ADMIN_RSS_IP4;
  		break;
  	case IPV6_FLOW:
  		proto = ENA_ADMIN_RSS_IP6;
  		break;
  	case ETHER_FLOW:
  		proto = ENA_ADMIN_RSS_NOT_IP;
  		break;
  	case AH_V4_FLOW:
  	case ESP_V4_FLOW:
  	case AH_V6_FLOW:
  	case ESP_V6_FLOW:
  	case SCTP_V4_FLOW:
  	case AH_ESP_V4_FLOW:
  		return -EOPNOTSUPP;
  	default:
  		return -EINVAL;
  	}
  
  	rc = ena_com_get_hash_ctrl(ena_dev, proto, &hash_fields);
  	if (rc)
  		return rc;
  
  	cmd->data = ena_flow_hash_to_flow_type(hash_fields);
  
  	return 0;
  }
  
  static int ena_set_rss_hash(struct ena_com_dev *ena_dev,
  			    struct ethtool_rxnfc *cmd)
  {
  	enum ena_admin_flow_hash_proto proto;
  	u16 hash_fields;
  
  	switch (cmd->flow_type) {
  	case TCP_V4_FLOW:
  		proto = ENA_ADMIN_RSS_TCP4;
  		break;
  	case UDP_V4_FLOW:
  		proto = ENA_ADMIN_RSS_UDP4;
  		break;
  	case TCP_V6_FLOW:
  		proto = ENA_ADMIN_RSS_TCP6;
  		break;
  	case UDP_V6_FLOW:
  		proto = ENA_ADMIN_RSS_UDP6;
  		break;
  	case IPV4_FLOW:
  		proto = ENA_ADMIN_RSS_IP4;
  		break;
  	case IPV6_FLOW:
  		proto = ENA_ADMIN_RSS_IP6;
  		break;
  	case ETHER_FLOW:
  		proto = ENA_ADMIN_RSS_NOT_IP;
  		break;
  	case AH_V4_FLOW:
  	case ESP_V4_FLOW:
  	case AH_V6_FLOW:
  	case ESP_V6_FLOW:
  	case SCTP_V4_FLOW:
  	case AH_ESP_V4_FLOW:
  		return -EOPNOTSUPP;
  	default:
  		return -EINVAL;
  	}
  
  	hash_fields = ena_flow_data_to_flow_hash(cmd->data);
  
  	return ena_com_fill_hash_ctrl(ena_dev, proto, hash_fields);
  }
  
  static int ena_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	int rc = 0;
  
  	switch (info->cmd) {
  	case ETHTOOL_SRXFH:
  		rc = ena_set_rss_hash(adapter->ena_dev, info);
  		break;
  	case ETHTOOL_SRXCLSRLDEL:
  	case ETHTOOL_SRXCLSRLINS:
  	default:
  		netif_err(adapter, drv, netdev,
  			  "Command parameter %d is not supported\n", info->cmd);
  		rc = -EOPNOTSUPP;
  	}
  
  	return rc;
  }
  
  static int ena_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
  			 u32 *rules)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	int rc = 0;
  
  	switch (info->cmd) {
  	case ETHTOOL_GRXRINGS:
  		info->data = adapter->num_queues;
  		rc = 0;
  		break;
  	case ETHTOOL_GRXFH:
  		rc = ena_get_rss_hash(adapter->ena_dev, info);
  		break;
  	case ETHTOOL_GRXCLSRLCNT:
  	case ETHTOOL_GRXCLSRULE:
  	case ETHTOOL_GRXCLSRLALL:
  	default:
  		netif_err(adapter, drv, netdev,
  			  "Command parameter %d is not supported\n", info->cmd);
  		rc = -EOPNOTSUPP;
  	}
  
  	return rc;
  }
  
  static u32 ena_get_rxfh_indir_size(struct net_device *netdev)
  {
  	return ENA_RX_RSS_TABLE_SIZE;
  }
  
  static u32 ena_get_rxfh_key_size(struct net_device *netdev)
  {
  	return ENA_HASH_KEY_SIZE;
  }
  
  static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
  			u8 *hfunc)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	enum ena_admin_hash_functions ena_func;
  	u8 func;
  	int rc;
  
  	rc = ena_com_indirect_table_get(adapter->ena_dev, indir);
  	if (rc)
  		return rc;
  
  	rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key);
  	if (rc)
  		return rc;
  
  	switch (ena_func) {
  	case ENA_ADMIN_TOEPLITZ:
  		func = ETH_RSS_HASH_TOP;
  		break;
  	case ENA_ADMIN_CRC32:
  		func = ETH_RSS_HASH_XOR;
  		break;
  	default:
  		netif_err(adapter, drv, netdev,
  			  "Command parameter is not supported\n");
  		return -EOPNOTSUPP;
  	}
  
  	if (hfunc)
  		*hfunc = func;
  
  	return rc;
  }
  
  static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
  			const u8 *key, const u8 hfunc)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	struct ena_com_dev *ena_dev = adapter->ena_dev;
  	enum ena_admin_hash_functions func;
  	int rc, i;
  
  	if (indir) {
  		for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
  			rc = ena_com_indirect_table_fill_entry(ena_dev,
  							       ENA_IO_RXQ_IDX(indir[i]),
  							       i);
  			if (unlikely(rc)) {
  				netif_err(adapter, drv, netdev,
  					  "Cannot fill indirect table (index is too large)\n");
  				return rc;
  			}
  		}
  
  		rc = ena_com_indirect_table_set(ena_dev);
  		if (rc) {
  			netif_err(adapter, drv, netdev,
  				  "Cannot set indirect table\n");
  			return rc == -EPERM ? -EOPNOTSUPP : rc;
  		}
  	}
  
  	switch (hfunc) {
  	case ETH_RSS_HASH_TOP:
  		func = ENA_ADMIN_TOEPLITZ;
  		break;
  	case ETH_RSS_HASH_XOR:
  		func = ENA_ADMIN_CRC32;
  		break;
  	default:
  		netif_err(adapter, drv, netdev, "Unsupported hfunc %d\n",
  			  hfunc);
  		return -EOPNOTSUPP;
  	}
  
  	if (key) {
  		rc = ena_com_fill_hash_function(ena_dev, func, key,
  						ENA_HASH_KEY_SIZE,
  						0xFFFFFFFF);
  		if (unlikely(rc)) {
  			netif_err(adapter, drv, netdev, "Cannot fill key\n");
  			return rc == -EPERM ? -EOPNOTSUPP : rc;
  		}
  	}
  
  	return 0;
  }
  
  static void ena_get_channels(struct net_device *netdev,
  			     struct ethtool_channels *channels)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  
  	channels->max_rx = adapter->num_queues;
  	channels->max_tx = adapter->num_queues;
  	channels->max_other = 0;
  	channels->max_combined = 0;
  	channels->rx_count = adapter->num_queues;
  	channels->tx_count = adapter->num_queues;
  	channels->other_count = 0;
  	channels->combined_count = 0;
  }
  
  static int ena_get_tunable(struct net_device *netdev,
  			   const struct ethtool_tunable *tuna, void *data)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	int ret = 0;
  
  	switch (tuna->id) {
  	case ETHTOOL_RX_COPYBREAK:
  		*(u32 *)data = adapter->rx_copybreak;
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  
  	return ret;
  }
  
  static int ena_set_tunable(struct net_device *netdev,
  			   const struct ethtool_tunable *tuna,
  			   const void *data)
  {
  	struct ena_adapter *adapter = netdev_priv(netdev);
  	int ret = 0;
  	u32 len;
  
  	switch (tuna->id) {
  	case ETHTOOL_RX_COPYBREAK:
  		len = *(u32 *)data;
  		if (len > adapter->netdev->mtu) {
  			ret = -EINVAL;
  			break;
  		}
  		adapter->rx_copybreak = len;
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  
  	return ret;
  }
  
  static const struct ethtool_ops ena_ethtool_ops = {
  	.get_link_ksettings	= ena_get_link_ksettings,
  	.get_drvinfo		= ena_get_drvinfo,
  	.get_msglevel		= ena_get_msglevel,
  	.set_msglevel		= ena_set_msglevel,
  	.get_link		= ethtool_op_get_link,
  	.get_coalesce		= ena_get_coalesce,
  	.set_coalesce		= ena_set_coalesce,
  	.get_ringparam		= ena_get_ringparam,
  	.get_sset_count         = ena_get_sset_count,
  	.get_strings		= ena_get_strings,
  	.get_ethtool_stats      = ena_get_ethtool_stats,
  	.get_rxnfc		= ena_get_rxnfc,
  	.set_rxnfc		= ena_set_rxnfc,
  	.get_rxfh_indir_size    = ena_get_rxfh_indir_size,
  	.get_rxfh_key_size	= ena_get_rxfh_key_size,
  	.get_rxfh		= ena_get_rxfh,
  	.set_rxfh		= ena_set_rxfh,
  	.get_channels		= ena_get_channels,
  	.get_tunable		= ena_get_tunable,
  	.set_tunable		= ena_set_tunable,
  };
  
  void ena_set_ethtool_ops(struct net_device *netdev)
  {
  	netdev->ethtool_ops = &ena_ethtool_ops;
  }
  
  static void ena_dump_stats_ex(struct ena_adapter *adapter, u8 *buf)
  {
  	struct net_device *netdev = adapter->netdev;
  	u8 *strings_buf;
  	u64 *data_buf;
  	int strings_num;
  	int i, rc;
  
  	strings_num = ena_get_sset_count(netdev, ETH_SS_STATS);
  	if (strings_num <= 0) {
  		netif_err(adapter, drv, netdev, "Can't get stats num\n");
  		return;
  	}
  
  	strings_buf = devm_kzalloc(&adapter->pdev->dev,
  				   strings_num * ETH_GSTRING_LEN,
  				   GFP_ATOMIC);
  	if (!strings_buf) {
  		netif_err(adapter, drv, netdev,
  			  "failed to alloc strings_buf\n");
  		return;
  	}
  
  	data_buf = devm_kzalloc(&adapter->pdev->dev,
  				strings_num * sizeof(u64),
  				GFP_ATOMIC);
  	if (!data_buf) {
  		netif_err(adapter, drv, netdev,
  			  "failed to allocate data buf\n");
  		devm_kfree(&adapter->pdev->dev, strings_buf);
  		return;
  	}
  
  	ena_get_strings(netdev, ETH_SS_STATS, strings_buf);
  	ena_get_ethtool_stats(netdev, NULL, data_buf);
  
  	/* If there is a buffer, dump stats, otherwise print them to dmesg */
  	if (buf)
  		for (i = 0; i < strings_num; i++) {
  			rc = snprintf(buf, ETH_GSTRING_LEN + sizeof(u64),
  				      "%s %llu\n",
  				      strings_buf + i * ETH_GSTRING_LEN,
  				      data_buf[i]);
  			buf += rc;
  		}
  	else
  		for (i = 0; i < strings_num; i++)
  			netif_err(adapter, drv, netdev, "%s: %llu\n",
  				  strings_buf + i * ETH_GSTRING_LEN,
  				  data_buf[i]);
  
  	devm_kfree(&adapter->pdev->dev, strings_buf);
  	devm_kfree(&adapter->pdev->dev, data_buf);
  }
  
  void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf)
  {
  	if (!buf)
  		return;
  
  	ena_dump_stats_ex(adapter, buf);
  }
  
  void ena_dump_stats_to_dmesg(struct ena_adapter *adapter)
  {
  	ena_dump_stats_ex(adapter, NULL);
  }
  