text: /*
   * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   *
   * 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
   * OpenIB.org 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/bpf.h>
  #include <linux/etherdevice.h>
  #include <linux/tcp.h>
  #include <linux/if_vlan.h>
  #include <linux/delay.h>
  #include <linux/slab.h>
  #include <linux/hash.h>
  #include <net/ip.h>
  #include <net/vxlan.h>
  #include <net/devlink.h>
  
  #include <linux/mlx4/driver.h>
  #include <linux/mlx4/device.h>
  #include <linux/mlx4/cmd.h>
  #include <linux/mlx4/cq.h>
  
  #include "mlx4_en.h"
  #include "en_port.h"
  
  #define MLX4_EN_MAX_XDP_MTU ((int)(PAGE_SIZE - ETH_HLEN - (2 * VLAN_HLEN) - \
  				   XDP_PACKET_HEADROOM))
  
  int mlx4_en_setup_tc(struct net_device *dev, u8 up)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	int i;
  	unsigned int offset = 0;
  
  	if (up && up != MLX4_EN_NUM_UP_HIGH)
  		return -EINVAL;
  
  	netdev_set_num_tc(dev, up);
  	netif_set_real_num_tx_queues(dev, priv->tx_ring_num[TX]);
  	/* Partition Tx queues evenly amongst UP's */
  	for (i = 0; i < up; i++) {
  		netdev_set_tc_queue(dev, i, priv->num_tx_rings_p_up, offset);
  		offset += priv->num_tx_rings_p_up;
  	}
  
  #ifdef CONFIG_MLX4_EN_DCB
  	if (!mlx4_is_slave(priv->mdev->dev)) {
  		if (up) {
  			if (priv->dcbx_cap)
  				priv->flags |= MLX4_EN_FLAG_DCB_ENABLED;
  		} else {
  			priv->flags &= ~MLX4_EN_FLAG_DCB_ENABLED;
  			priv->cee_config.pfc_state = false;
  		}
  	}
  #endif /* CONFIG_MLX4_EN_DCB */
  
  	return 0;
  }
  
  int mlx4_en_alloc_tx_queue_per_tc(struct net_device *dev, u8 tc)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_en_port_profile new_prof;
  	struct mlx4_en_priv *tmp;
  	int port_up = 0;
  	int err = 0;
  
  	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
  	if (!tmp)
  		return -ENOMEM;
  
  	mutex_lock(&mdev->state_lock);
  	memcpy(&new_prof, priv->prof, sizeof(struct mlx4_en_port_profile));
  	new_prof.num_up = (tc == 0) ? MLX4_EN_NUM_UP_LOW :
  				      MLX4_EN_NUM_UP_HIGH;
  	new_prof.tx_ring_num[TX] = new_prof.num_tx_rings_p_up *
  				   new_prof.num_up;
  	err = mlx4_en_try_alloc_resources(priv, tmp, &new_prof, true);
  	if (err)
  		goto out;
  
  	if (priv->port_up) {
  		port_up = 1;
  		mlx4_en_stop_port(dev, 1);
  	}
  
  	mlx4_en_safe_replace_resources(priv, tmp);
  	if (port_up) {
  		err = mlx4_en_start_port(dev);
  		if (err) {
  			en_err(priv, "Failed starting port for setup TC\n");
  			goto out;
  		}
  	}
  
  	err = mlx4_en_setup_tc(dev, tc);
  out:
  	mutex_unlock(&mdev->state_lock);
  	kfree(tmp);
  	return err;
  }
  
  static int __mlx4_en_setup_tc(struct net_device *dev, enum tc_setup_type type,
  			      void *type_data)
  {
  	struct tc_mqprio_qopt *mqprio = type_data;
  
  	if (type != TC_SETUP_QDISC_MQPRIO)
  		return -EOPNOTSUPP;
  
  	if (mqprio->num_tc && mqprio->num_tc != MLX4_EN_NUM_UP_HIGH)
  		return -EINVAL;
  
  	mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
  
  	return mlx4_en_alloc_tx_queue_per_tc(dev, mqprio->num_tc);
  }
  
  #ifdef CONFIG_RFS_ACCEL
  
  struct mlx4_en_filter {
  	struct list_head next;
  	struct work_struct work;
  
  	u8     ip_proto;
  	__be32 src_ip;
  	__be32 dst_ip;
  	__be16 src_port;
  	__be16 dst_port;
  
  	int rxq_index;
  	struct mlx4_en_priv *priv;
  	u32 flow_id;			/* RFS infrastructure id */
  	int id;				/* mlx4_en driver id */
  	u64 reg_id;			/* Flow steering API id */
  	u8 activated;			/* Used to prevent expiry before filter
  					 * is attached
  					 */
  	struct hlist_node filter_chain;
  };
  
  static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv);
  
  static enum mlx4_net_trans_rule_id mlx4_ip_proto_to_trans_rule_id(u8 ip_proto)
  {
  	switch (ip_proto) {
  	case IPPROTO_UDP:
  		return MLX4_NET_TRANS_RULE_ID_UDP;
  	case IPPROTO_TCP:
  		return MLX4_NET_TRANS_RULE_ID_TCP;
  	default:
  		return MLX4_NET_TRANS_RULE_NUM;
  	}
  };
  
  /* Must not acquire state_lock, as its corresponding work_sync
   * is done under it.
   */
  static void mlx4_en_filter_work(struct work_struct *work)
  {
  	struct mlx4_en_filter *filter = container_of(work,
  						     struct mlx4_en_filter,
  						     work);
  	struct mlx4_en_priv *priv = filter->priv;
  	struct mlx4_spec_list spec_tcp_udp = {
  		.id = mlx4_ip_proto_to_trans_rule_id(filter->ip_proto),
  		{
  			.tcp_udp = {
  				.dst_port = filter->dst_port,
  				.dst_port_msk = (__force __be16)-1,
  				.src_port = filter->src_port,
  				.src_port_msk = (__force __be16)-1,
  			},
  		},
  	};
  	struct mlx4_spec_list spec_ip = {
  		.id = MLX4_NET_TRANS_RULE_ID_IPV4,
  		{
  			.ipv4 = {
  				.dst_ip = filter->dst_ip,
  				.dst_ip_msk = (__force __be32)-1,
  				.src_ip = filter->src_ip,
  				.src_ip_msk = (__force __be32)-1,
  			},
  		},
  	};
  	struct mlx4_spec_list spec_eth = {
  		.id = MLX4_NET_TRANS_RULE_ID_ETH,
  	};
  	struct mlx4_net_trans_rule rule = {
  		.list = LIST_HEAD_INIT(rule.list),
  		.queue_mode = MLX4_NET_TRANS_Q_LIFO,
  		.exclusive = 1,
  		.allow_loopback = 1,
  		.promisc_mode = MLX4_FS_REGULAR,
  		.port = priv->port,
  		.priority = MLX4_DOMAIN_RFS,
  	};
  	int rc;
  	__be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
  
  	if (spec_tcp_udp.id >= MLX4_NET_TRANS_RULE_NUM) {
  		en_warn(priv, "RFS: ignoring unsupported ip protocol (%d)\n",
  			filter->ip_proto);
  		goto ignore;
  	}
  	list_add_tail(&spec_eth.list, &rule.list);
  	list_add_tail(&spec_ip.list, &rule.list);
  	list_add_tail(&spec_tcp_udp.list, &rule.list);
  
  	rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
  	memcpy(spec_eth.eth.dst_mac, priv->dev->dev_addr, ETH_ALEN);
  	memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
  
  	filter->activated = 0;
  
  	if (filter->reg_id) {
  		rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
  		if (rc && rc != -ENOENT)
  			en_err(priv, "Error detaching flow. rc = %d\n", rc);
  	}
  
  	rc = mlx4_flow_attach(priv->mdev->dev, &rule, &filter->reg_id);
  	if (rc)
  		en_err(priv, "Error attaching flow. err = %d\n", rc);
  
  ignore:
  	mlx4_en_filter_rfs_expire(priv);
  
  	filter->activated = 1;
  }
  
  static inline struct hlist_head *
  filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
  		   __be16 src_port, __be16 dst_port)
  {
  	unsigned long l;
  	int bucket_idx;
  
  	l = (__force unsigned long)src_port |
  	    ((__force unsigned long)dst_port << 2);
  	l ^= (__force unsigned long)(src_ip ^ dst_ip);
  
  	bucket_idx = hash_long(l, MLX4_EN_FILTER_HASH_SHIFT);
  
  	return &priv->filter_hash[bucket_idx];
  }
  
  static struct mlx4_en_filter *
  mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
  		     __be32 dst_ip, u8 ip_proto, __be16 src_port,
  		     __be16 dst_port, u32 flow_id)
  {
  	struct mlx4_en_filter *filter = NULL;
  
  	filter = kzalloc(sizeof(struct mlx4_en_filter), GFP_ATOMIC);
  	if (!filter)
  		return NULL;
  
  	filter->priv = priv;
  	filter->rxq_index = rxq_index;
  	INIT_WORK(&filter->work, mlx4_en_filter_work);
  
  	filter->src_ip = src_ip;
  	filter->dst_ip = dst_ip;
  	filter->ip_proto = ip_proto;
  	filter->src_port = src_port;
  	filter->dst_port = dst_port;
  
  	filter->flow_id = flow_id;
  
  	filter->id = priv->last_filter_id++ % RPS_NO_FILTER;
  
  	list_add_tail(&filter->next, &priv->filters);
  	hlist_add_head(&filter->filter_chain,
  		       filter_hash_bucket(priv, src_ip, dst_ip, src_port,
  					  dst_port));
  
  	return filter;
  }
  
  static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
  {
  	struct mlx4_en_priv *priv = filter->priv;
  	int rc;
  
  	list_del(&filter->next);
  
  	rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
  	if (rc && rc != -ENOENT)
  		en_err(priv, "Error detaching flow. rc = %d\n", rc);
  
  	kfree(filter);
  }
  
  static inline struct mlx4_en_filter *
  mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
  		    u8 ip_proto, __be16 src_port, __be16 dst_port)
  {
  	struct mlx4_en_filter *filter;
  	struct mlx4_en_filter *ret = NULL;
  
  	hlist_for_each_entry(filter,
  			     filter_hash_bucket(priv, src_ip, dst_ip,
  						src_port, dst_port),
  			     filter_chain) {
  		if (filter->src_ip == src_ip &&
  		    filter->dst_ip == dst_ip &&
  		    filter->ip_proto == ip_proto &&
  		    filter->src_port == src_port &&
  		    filter->dst_port == dst_port) {
  			ret = filter;
  			break;
  		}
  	}
  
  	return ret;
  }
  
  static int
  mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
  		   u16 rxq_index, u32 flow_id)
  {
  	struct mlx4_en_priv *priv = netdev_priv(net_dev);
  	struct mlx4_en_filter *filter;
  	const struct iphdr *ip;
  	const __be16 *ports;
  	u8 ip_proto;
  	__be32 src_ip;
  	__be32 dst_ip;
  	__be16 src_port;
  	__be16 dst_port;
  	int nhoff = skb_network_offset(skb);
  	int ret = 0;
  
  	if (skb->protocol != htons(ETH_P_IP))
  		return -EPROTONOSUPPORT;
  
  	ip = (const struct iphdr *)(skb->data + nhoff);
  	if (ip_is_fragment(ip))
  		return -EPROTONOSUPPORT;
  
  	if ((ip->protocol != IPPROTO_TCP) && (ip->protocol != IPPROTO_UDP))
  		return -EPROTONOSUPPORT;
  	ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
  
  	ip_proto = ip->protocol;
  	src_ip = ip->saddr;
  	dst_ip = ip->daddr;
  	src_port = ports[0];
  	dst_port = ports[1];
  
  	spin_lock_bh(&priv->filters_lock);
  	filter = mlx4_en_filter_find(priv, src_ip, dst_ip, ip_proto,
  				     src_port, dst_port);
  	if (filter) {
  		if (filter->rxq_index == rxq_index)
  			goto out;
  
  		filter->rxq_index = rxq_index;
  	} else {
  		filter = mlx4_en_filter_alloc(priv, rxq_index,
  					      src_ip, dst_ip, ip_proto,
  					      src_port, dst_port, flow_id);
  		if (!filter) {
  			ret = -ENOMEM;
  			goto err;
  		}
  	}
  
  	queue_work(priv->mdev->workqueue, &filter->work);
  
  out:
  	ret = filter->id;
  err:
  	spin_unlock_bh(&priv->filters_lock);
  
  	return ret;
  }
  
  void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv)
  {
  	struct mlx4_en_filter *filter, *tmp;
  	LIST_HEAD(del_list);
  
  	spin_lock_bh(&priv->filters_lock);
  	list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
  		list_move(&filter->next, &del_list);
  		hlist_del(&filter->filter_chain);
  	}
  	spin_unlock_bh(&priv->filters_lock);
  
  	list_for_each_entry_safe(filter, tmp, &del_list, next) {
  		cancel_work_sync(&filter->work);
  		mlx4_en_filter_free(filter);
  	}
  }
  
  static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
  {
  	struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
  	LIST_HEAD(del_list);
  	int i = 0;
  
  	spin_lock_bh(&priv->filters_lock);
  	list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
  		if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
  			break;
  
  		if (filter->activated &&
  		    !work_pending(&filter->work) &&
  		    rps_may_expire_flow(priv->dev,
  					filter->rxq_index, filter->flow_id,
  					filter->id)) {
  			list_move(&filter->next, &del_list);
  			hlist_del(&filter->filter_chain);
  		} else
  			last_filter = filter;
  
  		i++;
  	}
  
  	if (last_filter && (&last_filter->next != priv->filters.next))
  		list_move(&priv->filters, &last_filter->next);
  
  	spin_unlock_bh(&priv->filters_lock);
  
  	list_for_each_entry_safe(filter, tmp, &del_list, next)
  		mlx4_en_filter_free(filter);
  }
  #endif
  
  static int mlx4_en_vlan_rx_add_vid(struct net_device *dev,
  				   __be16 proto, u16 vid)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int err;
  	int idx;
  
  	en_dbg(HW, priv, "adding VLAN:%d\n", vid);
  
  	set_bit(vid, priv->active_vlans);
  
  	/* Add VID to port VLAN filter */
  	mutex_lock(&mdev->state_lock);
  	if (mdev->device_up && priv->port_up) {
  		err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
  		if (err) {
  			en_err(priv, "Failed configuring VLAN filter\n");
  			goto out;
  		}
  	}
  	err = mlx4_register_vlan(mdev->dev, priv->port, vid, &idx);
  	if (err)
  		en_dbg(HW, priv, "Failed adding vlan %d\n", vid);
  
  out:
  	mutex_unlock(&mdev->state_lock);
  	return err;
  }
  
  static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev,
  				    __be16 proto, u16 vid)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int err = 0;
  
  	en_dbg(HW, priv, "Killing VID:%d\n", vid);
  
  	clear_bit(vid, priv->active_vlans);
  
  	/* Remove VID from port VLAN filter */
  	mutex_lock(&mdev->state_lock);
  	mlx4_unregister_vlan(mdev->dev, priv->port, vid);
  
  	if (mdev->device_up && priv->port_up) {
  		err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
  		if (err)
  			en_err(priv, "Failed configuring VLAN filter\n");
  	}
  	mutex_unlock(&mdev->state_lock);
  
  	return err;
  }
  
  static void mlx4_en_u64_to_mac(unsigned char dst_mac[ETH_ALEN + 2], u64 src_mac)
  {
  	int i;
  	for (i = ETH_ALEN - 1; i >= 0; --i) {
  		dst_mac[i] = src_mac & 0xff;
  		src_mac >>= 8;
  	}
  	memset(&dst_mac[ETH_ALEN], 0, 2);
  }
  
  
  static int mlx4_en_tunnel_steer_add(struct mlx4_en_priv *priv, unsigned char *addr,
  				    int qpn, u64 *reg_id)
  {
  	int err;
  
  	if (priv->mdev->dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN ||
  	    priv->mdev->dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC)
  		return 0; /* do nothing */
  
  	err = mlx4_tunnel_steer_add(priv->mdev->dev, addr, priv->port, qpn,
  				    MLX4_DOMAIN_NIC, reg_id);
  	if (err) {
  		en_err(priv, "failed to add vxlan steering rule, err %d\n", err);
  		return err;
  	}
  	en_dbg(DRV, priv, "added vxlan steering rule, mac %pM reg_id %llx\n", addr, *reg_id);
  	return 0;
  }
  
  
  static int mlx4_en_uc_steer_add(struct mlx4_en_priv *priv,
  				unsigned char *mac, int *qpn, u64 *reg_id)
  {
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_dev *dev = mdev->dev;
  	int err;
  
  	switch (dev->caps.steering_mode) {
  	case MLX4_STEERING_MODE_B0: {
  		struct mlx4_qp qp;
  		u8 gid[16] = {0};
  
  		qp.qpn = *qpn;
  		memcpy(&gid[10], mac, ETH_ALEN);
  		gid[5] = priv->port;
  
  		err = mlx4_unicast_attach(dev, &qp, gid, 0, MLX4_PROT_ETH);
  		break;
  	}
  	case MLX4_STEERING_MODE_DEVICE_MANAGED: {
  		struct mlx4_spec_list spec_eth = { {NULL} };
  		__be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
  
  		struct mlx4_net_trans_rule rule = {
  			.queue_mode = MLX4_NET_TRANS_Q_FIFO,
  			.exclusive = 0,
  			.allow_loopback = 1,
  			.promisc_mode = MLX4_FS_REGULAR,
  			.priority = MLX4_DOMAIN_NIC,
  		};
  
  		rule.port = priv->port;
  		rule.qpn = *qpn;
  		INIT_LIST_HEAD(&rule.list);
  
  		spec_eth.id = MLX4_NET_TRANS_RULE_ID_ETH;
  		memcpy(spec_eth.eth.dst_mac, mac, ETH_ALEN);
  		memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
  		list_add_tail(&spec_eth.list, &rule.list);
  
  		err = mlx4_flow_attach(dev, &rule, reg_id);
  		break;
  	}
  	default:
  		return -EINVAL;
  	}
  	if (err)
  		en_warn(priv, "Failed Attaching Unicast\n");
  
  	return err;
  }
  
  static void mlx4_en_uc_steer_release(struct mlx4_en_priv *priv,
  				     unsigned char *mac, int qpn, u64 reg_id)
  {
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_dev *dev = mdev->dev;
  
  	switch (dev->caps.steering_mode) {
  	case MLX4_STEERING_MODE_B0: {
  		struct mlx4_qp qp;
  		u8 gid[16] = {0};
  
  		qp.qpn = qpn;
  		memcpy(&gid[10], mac, ETH_ALEN);
  		gid[5] = priv->port;
  
  		mlx4_unicast_detach(dev, &qp, gid, MLX4_PROT_ETH);
  		break;
  	}
  	case MLX4_STEERING_MODE_DEVICE_MANAGED: {
  		mlx4_flow_detach(dev, reg_id);
  		break;
  	}
  	default:
  		en_err(priv, "Invalid steering mode.\n");
  	}
  }
  
  static int mlx4_en_get_qp(struct mlx4_en_priv *priv)
  {
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_dev *dev = mdev->dev;
  	int index = 0;
  	int err = 0;
  	int *qpn = &priv->base_qpn;
  	u64 mac = mlx4_mac_to_u64(priv->dev->dev_addr);
  
  	en_dbg(DRV, priv, "Registering MAC: %pM for adding\n",
  	       priv->dev->dev_addr);
  	index = mlx4_register_mac(dev, priv->port, mac);
  	if (index < 0) {
  		err = index;
  		en_err(priv, "Failed adding MAC: %pM\n",
  		       priv->dev->dev_addr);
  		return err;
  	}
  
  	en_info(priv, "Steering Mode %d\n", dev->caps.steering_mode);
  
  	if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
  		int base_qpn = mlx4_get_base_qpn(dev, priv->port);
  		*qpn = base_qpn + index;
  		return 0;
  	}
  
  	err = mlx4_qp_reserve_range(dev, 1, 1, qpn, MLX4_RESERVE_A0_QP,
  				    MLX4_RES_USAGE_DRIVER);
  	en_dbg(DRV, priv, "Reserved qp %d\n", *qpn);
  	if (err) {
  		en_err(priv, "Failed to reserve qp for mac registration\n");
  		mlx4_unregister_mac(dev, priv->port, mac);
  		return err;
  	}
  
  	return 0;
  }
  
  static void mlx4_en_put_qp(struct mlx4_en_priv *priv)
  {
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_dev *dev = mdev->dev;
  	int qpn = priv->base_qpn;
  
  	if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
  		u64 mac = mlx4_mac_to_u64(priv->dev->dev_addr);
  		en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
  		       priv->dev->dev_addr);
  		mlx4_unregister_mac(dev, priv->port, mac);
  	} else {
  		en_dbg(DRV, priv, "Releasing qp: port %d, qpn %d\n",
  		       priv->port, qpn);
  		mlx4_qp_release_range(dev, qpn, 1);
  		priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
  	}
  }
  
  static int mlx4_en_replace_mac(struct mlx4_en_priv *priv, int qpn,
  			       unsigned char *new_mac, unsigned char *prev_mac)
  {
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_dev *dev = mdev->dev;
  	int err = 0;
  	u64 new_mac_u64 = mlx4_mac_to_u64(new_mac);
  
  	if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
  		struct hlist_head *bucket;
  		unsigned int mac_hash;
  		struct mlx4_mac_entry *entry;
  		struct hlist_node *tmp;
  		u64 prev_mac_u64 = mlx4_mac_to_u64(prev_mac);
  
  		bucket = &priv->mac_hash[prev_mac[MLX4_EN_MAC_HASH_IDX]];
  		hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
  			if (ether_addr_equal_64bits(entry->mac, prev_mac)) {
  				mlx4_en_uc_steer_release(priv, entry->mac,
  							 qpn, entry->reg_id);
  				mlx4_unregister_mac(dev, priv->port,
  						    prev_mac_u64);
  				hlist_del_rcu(&entry->hlist);
  				synchronize_rcu();
  				memcpy(entry->mac, new_mac, ETH_ALEN);
  				entry->reg_id = 0;
  				mac_hash = new_mac[MLX4_EN_MAC_HASH_IDX];
  				hlist_add_head_rcu(&entry->hlist,
  						   &priv->mac_hash[mac_hash]);
  				mlx4_register_mac(dev, priv->port, new_mac_u64);
  				err = mlx4_en_uc_steer_add(priv, new_mac,
  							   &qpn,
  							   &entry->reg_id);
  				if (err)
  					return err;
  				if (priv->tunnel_reg_id) {
  					mlx4_flow_detach(priv->mdev->dev, priv->tunnel_reg_id);
  					priv->tunnel_reg_id = 0;
  				}
  				err = mlx4_en_tunnel_steer_add(priv, new_mac, qpn,
  							       &priv->tunnel_reg_id);
  				return err;
  			}
  		}
  		return -EINVAL;
  	}
  
  	return __mlx4_replace_mac(dev, priv->port, qpn, new_mac_u64);
  }
  
  static void mlx4_en_update_user_mac(struct mlx4_en_priv *priv,
  				    unsigned char new_mac[ETH_ALEN + 2])
  {
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int err;
  
  	if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_USER_MAC_EN))
  		return;
  
  	err = mlx4_SET_PORT_user_mac(mdev->dev, priv->port, new_mac);
  	if (err)
  		en_err(priv, "Failed to pass user MAC(%pM) to Firmware for port %d, with error %d\n",
  		       new_mac, priv->port, err);
  }
  
  static int mlx4_en_do_set_mac(struct mlx4_en_priv *priv,
  			      unsigned char new_mac[ETH_ALEN + 2])
  {
  	int err = 0;
  
  	if (priv->port_up) {
  		/* Remove old MAC and insert the new one */
  		err = mlx4_en_replace_mac(priv, priv->base_qpn,
  					  new_mac, priv->current_mac);
  		if (err)
  			en_err(priv, "Failed changing HW MAC address\n");
  	} else
  		en_dbg(HW, priv, "Port is down while registering mac, exiting...\n");
  
  	if (!err)
  		memcpy(priv->current_mac, new_mac, sizeof(priv->current_mac));
  
  	return err;
  }
  
  static int mlx4_en_set_mac(struct net_device *dev, void *addr)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct sockaddr *saddr = addr;
  	unsigned char new_mac[ETH_ALEN + 2];
  	int err;
  
  	if (!is_valid_ether_addr(saddr->sa_data))
  		return -EADDRNOTAVAIL;
  
  	mutex_lock(&mdev->state_lock);
  	memcpy(new_mac, saddr->sa_data, ETH_ALEN);
  	err = mlx4_en_do_set_mac(priv, new_mac);
  	if (err)
  		goto out;
  
  	memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
  	mlx4_en_update_user_mac(priv, new_mac);
  out:
  	mutex_unlock(&mdev->state_lock);
  
  	return err;
  }
  
  static void mlx4_en_clear_list(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_mc_list *tmp, *mc_to_del;
  
  	list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
  		list_del(&mc_to_del->list);
  		kfree(mc_to_del);
  	}
  }
  
  static void mlx4_en_cache_mclist(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct netdev_hw_addr *ha;
  	struct mlx4_en_mc_list *tmp;
  
  	mlx4_en_clear_list(dev);
  	netdev_for_each_mc_addr(ha, dev) {
  		tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
  		if (!tmp) {
  			mlx4_en_clear_list(dev);
  			return;
  		}
  		memcpy(tmp->addr, ha->addr, ETH_ALEN);
  		list_add_tail(&tmp->list, &priv->mc_list);
  	}
  }
  
  static void update_mclist_flags(struct mlx4_en_priv *priv,
  				struct list_head *dst,
  				struct list_head *src)
  {
  	struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
  	bool found;
  
  	/* Find all the entries that should be removed from dst,
  	 * These are the entries that are not found in src
  	 */
  	list_for_each_entry(dst_tmp, dst, list) {
  		found = false;
  		list_for_each_entry(src_tmp, src, list) {
  			if (ether_addr_equal(dst_tmp->addr, src_tmp->addr)) {
  				found = true;
  				break;
  			}
  		}
  		if (!found)
  			dst_tmp->action = MCLIST_REM;
  	}
  
  	/* Add entries that exist in src but not in dst
  	 * mark them as need to add
  	 */
  	list_for_each_entry(src_tmp, src, list) {
  		found = false;
  		list_for_each_entry(dst_tmp, dst, list) {
  			if (ether_addr_equal(dst_tmp->addr, src_tmp->addr)) {
  				dst_tmp->action = MCLIST_NONE;
  				found = true;
  				break;
  			}
  		}
  		if (!found) {
  			new_mc = kmemdup(src_tmp,
  					 sizeof(struct mlx4_en_mc_list),
  					 GFP_KERNEL);
  			if (!new_mc)
  				return;
  
  			new_mc->action = MCLIST_ADD;
  			list_add_tail(&new_mc->list, dst);
  		}
  	}
  }
  
  static void mlx4_en_set_rx_mode(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  
  	if (!priv->port_up)
  		return;
  
  	queue_work(priv->mdev->workqueue, &priv->rx_mode_task);
  }
  
  static void mlx4_en_set_promisc_mode(struct mlx4_en_priv *priv,
  				     struct mlx4_en_dev *mdev)
  {
  	int err = 0;
  
  	if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
  		if (netif_msg_rx_status(priv))
  			en_warn(priv, "Entering promiscuous mode\n");
  		priv->flags |= MLX4_EN_FLAG_PROMISC;
  
  		/* Enable promiscouos mode */
  		switch (mdev->dev->caps.steering_mode) {
  		case MLX4_STEERING_MODE_DEVICE_MANAGED:
  			err = mlx4_flow_steer_promisc_add(mdev->dev,
  							  priv->port,
  							  priv->base_qpn,
  							  MLX4_FS_ALL_DEFAULT);
  			if (err)
  				en_err(priv, "Failed enabling promiscuous mode\n");
  			priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
  			break;
  
  		case MLX4_STEERING_MODE_B0:
  			err = mlx4_unicast_promisc_add(mdev->dev,
  						       priv->base_qpn,
  						       priv->port);
  			if (err)
  				en_err(priv, "Failed enabling unicast promiscuous mode\n");
  
  			/* Add the default qp number as multicast
  			 * promisc
  			 */
  			if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
  				err = mlx4_multicast_promisc_add(mdev->dev,
  								 priv->base_qpn,
  								 priv->port);
  				if (err)
  					en_err(priv, "Failed enabling multicast promiscuous mode\n");
  				priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
  			}
  			break;
  
  		case MLX4_STEERING_MODE_A0:
  			err = mlx4_SET_PORT_qpn_calc(mdev->dev,
  						     priv->port,
  						     priv->base_qpn,
  						     1);
  			if (err)
  				en_err(priv, "Failed enabling promiscuous mode\n");
  			break;
  		}
  
  		/* Disable port multicast filter (unconditionally) */
  		err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
  					  0, MLX4_MCAST_DISABLE);
  		if (err)
  			en_err(priv, "Failed disabling multicast filter\n");
  	}
  }
  
  static void mlx4_en_clear_promisc_mode(struct mlx4_en_priv *priv,
  				       struct mlx4_en_dev *mdev)
  {
  	int err = 0;
  
  	if (netif_msg_rx_status(priv))
  		en_warn(priv, "Leaving promiscuous mode\n");
  	priv->flags &= ~MLX4_EN_FLAG_PROMISC;
  
  	/* Disable promiscouos mode */
  	switch (mdev->dev->caps.steering_mode) {
  	case MLX4_STEERING_MODE_DEVICE_MANAGED:
  		err = mlx4_flow_steer_promisc_remove(mdev->dev,
  						     priv->port,
  						     MLX4_FS_ALL_DEFAULT);
  		if (err)
  			en_err(priv, "Failed disabling promiscuous mode\n");
  		priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
  		break;
  
  	case MLX4_STEERING_MODE_B0:
  		err = mlx4_unicast_promisc_remove(mdev->dev,
  						  priv->base_qpn,
  						  priv->port);
  		if (err)
  			en_err(priv, "Failed disabling unicast promiscuous mode\n");
  		/* Disable Multicast promisc */
  		if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
  			err = mlx4_multicast_promisc_remove(mdev->dev,
  							    priv->base_qpn,
  							    priv->port);
  			if (err)
  				en_err(priv, "Failed disabling multicast promiscuous mode\n");
  			priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
  		}
  		break;
  
  	case MLX4_STEERING_MODE_A0:
  		err = mlx4_SET_PORT_qpn_calc(mdev->dev,
  					     priv->port,
  					     priv->base_qpn, 0);
  		if (err)
  			en_err(priv, "Failed disabling promiscuous mode\n");
  		break;
  	}
  }
  
  static void mlx4_en_do_multicast(struct mlx4_en_priv *priv,
  				 struct net_device *dev,
  				 struct mlx4_en_dev *mdev)
  {
  	struct mlx4_en_mc_list *mclist, *tmp;
  	u64 mcast_addr = 0;
  	u8 mc_list[16] = {0};
  	int err = 0;
  
  	/* Enable/disable the multicast filter according to IFF_ALLMULTI */
  	if (dev->flags & IFF_ALLMULTI) {
  		err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
  					  0, MLX4_MCAST_DISABLE);
  		if (err)
  			en_err(priv, "Failed disabling multicast filter\n");
  
  		/* Add the default qp number as multicast promisc */
  		if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
  			switch (mdev->dev->caps.steering_mode) {
  			case MLX4_STEERING_MODE_DEVICE_MANAGED:
  				err = mlx4_flow_steer_promisc_add(mdev->dev,
  								  priv->port,
  								  priv->base_qpn,
  								  MLX4_FS_MC_DEFAULT);
  				break;
  
  			case MLX4_STEERING_MODE_B0:
  				err = mlx4_multicast_promisc_add(mdev->dev,
  								 priv->base_qpn,
  								 priv->port);
  				break;
  
  			case MLX4_STEERING_MODE_A0:
  				break;
  			}
  			if (err)
  				en_err(priv, "Failed entering multicast promisc mode\n");
  			priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
  		}
  	} else {
  		/* Disable Multicast promisc */
  		if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
  			switch (mdev->dev->caps.steering_mode) {
  			case MLX4_STEERING_MODE_DEVICE_MANAGED:
  				err = mlx4_flow_steer_promisc_remove(mdev->dev,
  								     priv->port,
  								     MLX4_FS_MC_DEFAULT);
  				break;
  
  			case MLX4_STEERING_MODE_B0:
  				err = mlx4_multicast_promisc_remove(mdev->dev,
  								    priv->base_qpn,
  								    priv->port);
  				break;
  
  			case MLX4_STEERING_MODE_A0:
  				break;
  			}
  			if (err)
  				en_err(priv, "Failed disabling multicast promiscuous mode\n");
  			priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
  		}
  
  		err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
  					  0, MLX4_MCAST_DISABLE);
  		if (err)
  			en_err(priv, "Failed disabling multicast filter\n");
  
  		/* Flush mcast filter and init it with broadcast address */
  		mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
  				    1, MLX4_MCAST_CONFIG);
  
  		/* Update multicast list - we cache all addresses so they won't
  		 * change while HW is updated holding the command semaphor */
  		netif_addr_lock_bh(dev);
  		mlx4_en_cache_mclist(dev);
  		netif_addr_unlock_bh(dev);
  		list_for_each_entry(mclist, &priv->mc_list, list) {
  			mcast_addr = mlx4_mac_to_u64(mclist->addr);
  			mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
  					    mcast_addr, 0, MLX4_MCAST_CONFIG);
  		}
  		err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
  					  0, MLX4_MCAST_ENABLE);
  		if (err)
  			en_err(priv, "Failed enabling multicast filter\n");
  
  		update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
  		list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
  			if (mclist->action == MCLIST_REM) {
  				/* detach this address and delete from list */
  				memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
  				mc_list[5] = priv->port;
  				err = mlx4_multicast_detach(mdev->dev,
  							    priv->rss_map.indir_qp,
  							    mc_list,
  							    MLX4_PROT_ETH,
  							    mclist->reg_id);
  				if (err)
  					en_err(priv, "Fail to detach multicast address\n");
  
  				if (mclist->tunnel_reg_id) {
  					err = mlx4_flow_detach(priv->mdev->dev, mclist->tunnel_reg_id);
  					if (err)
  						en_err(priv, "Failed to detach multicast address\n");
  				}
  
  				/* remove from list */
  				list_del(&mclist->list);
  				kfree(mclist);
  			} else if (mclist->action == MCLIST_ADD) {
  				/* attach the address */
  				memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
  				/* needed for B0 steering support */
  				mc_list[5] = priv->port;
  				err = mlx4_multicast_attach(mdev->dev,
  							    priv->rss_map.indir_qp,
  							    mc_list,
  							    priv->port, 0,
  							    MLX4_PROT_ETH,
  							    &mclist->reg_id);
  				if (err)
  					en_err(priv, "Fail to attach multicast address\n");
  
  				err = mlx4_en_tunnel_steer_add(priv, &mc_list[10], priv->base_qpn,
  							       &mclist->tunnel_reg_id);
  				if (err)
  					en_err(priv, "Failed to attach multicast address\n");
  			}
  		}
  	}
  }
  
  static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
  				 struct net_device *dev,
  				 struct mlx4_en_dev *mdev)
  {
  	struct netdev_hw_addr *ha;
  	struct mlx4_mac_entry *entry;
  	struct hlist_node *tmp;
  	bool found;
  	u64 mac;
  	int err = 0;
  	struct hlist_head *bucket;
  	unsigned int i;
  	int removed = 0;
  	u32 prev_flags;
  
  	/* Note that we do not need to protect our mac_hash traversal with rcu,
  	 * since all modification code is protected by mdev->state_lock
  	 */
  
  	/* find what to remove */
  	for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
  		bucket = &priv->mac_hash[i];
  		hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
  			found = false;
  			netdev_for_each_uc_addr(ha, dev) {
  				if (ether_addr_equal_64bits(entry->mac,
  							    ha->addr)) {
  					found = true;
  					break;
  				}
  			}
  
  			/* MAC address of the port is not in uc list */
  			if (ether_addr_equal_64bits(entry->mac,
  						    priv->current_mac))
  				found = true;
  
  			if (!found) {
  				mac = mlx4_mac_to_u64(entry->mac);
  				mlx4_en_uc_steer_release(priv, entry->mac,
  							 priv->base_qpn,
  							 entry->reg_id);
  				mlx4_unregister_mac(mdev->dev, priv->port, mac);
  
  				hlist_del_rcu(&entry->hlist);
  				kfree_rcu(entry, rcu);
  				en_dbg(DRV, priv, "Removed MAC %pM on port:%d\n",
  				       entry->mac, priv->port);
  				++removed;
  			}
  		}
  	}
  
  	/* if we didn't remove anything, there is no use in trying to add
  	 * again once we are in a forced promisc mode state
  	 */
  	if ((priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) && 0 == removed)
  		return;
  
  	prev_flags = priv->flags;
  	priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
  
  	/* find what to add */
  	netdev_for_each_uc_addr(ha, dev) {
  		found = false;
  		bucket = &priv->mac_hash[ha->addr[MLX4_EN_MAC_HASH_IDX]];
  		hlist_for_each_entry(entry, bucket, hlist) {
  			if (ether_addr_equal_64bits(entry->mac, ha->addr)) {
  				found = true;
  				break;
  			}
  		}
  
  		if (!found) {
  			entry = kmalloc(sizeof(*entry), GFP_KERNEL);
  			if (!entry) {
  				en_err(priv, "Failed adding MAC %pM on port:%d (out of memory)\n",
  				       ha->addr, priv->port);
  				priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
  				break;
  			}
  			mac = mlx4_mac_to_u64(ha->addr);
  			memcpy(entry->mac, ha->addr, ETH_ALEN);
  			err = mlx4_register_mac(mdev->dev, priv->port, mac);
  			if (err < 0) {
  				en_err(priv, "Failed registering MAC %pM on port %d: %d\n",
  				       ha->addr, priv->port, err);
  				kfree(entry);
  				priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
  				break;
  			}
  			err = mlx4_en_uc_steer_add(priv, ha->addr,
  						   &priv->base_qpn,
  						   &entry->reg_id);
  			if (err) {
  				en_err(priv, "Failed adding MAC %pM on port %d: %d\n",
  				       ha->addr, priv->port, err);
  				mlx4_unregister_mac(mdev->dev, priv->port, mac);
  				kfree(entry);
  				priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
  				break;
  			} else {
  				unsigned int mac_hash;
  				en_dbg(DRV, priv, "Added MAC %pM on port:%d\n",
  				       ha->addr, priv->port);
  				mac_hash = ha->addr[MLX4_EN_MAC_HASH_IDX];
  				bucket = &priv->mac_hash[mac_hash];
  				hlist_add_head_rcu(&entry->hlist, bucket);
  			}
  		}
  	}
  
  	if (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) {
  		en_warn(priv, "Forcing promiscuous mode on port:%d\n",
  			priv->port);
  	} else if (prev_flags & MLX4_EN_FLAG_FORCE_PROMISC) {
  		en_warn(priv, "Stop forcing promiscuous mode on port:%d\n",
  			priv->port);
  	}
  }
  
  static void mlx4_en_do_set_rx_mode(struct work_struct *work)
  {
  	struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
  						 rx_mode_task);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct net_device *dev = priv->dev;
  
  	mutex_lock(&mdev->state_lock);
  	if (!mdev->device_up) {
  		en_dbg(HW, priv, "Card is not up, ignoring rx mode change.\n");
  		goto out;
  	}
  	if (!priv->port_up) {
  		en_dbg(HW, priv, "Port is down, ignoring rx mode change.\n");
  		goto out;
  	}
  
  	if (!netif_carrier_ok(dev)) {
  		if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
  			if (priv->port_state.link_state) {
  				priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
  				netif_carrier_on(dev);
  				en_dbg(LINK, priv, "Link Up\n");
  			}
  		}
  	}
  
  	if (dev->priv_flags & IFF_UNICAST_FLT)
  		mlx4_en_do_uc_filter(priv, dev, mdev);
  
  	/* Promsicuous mode: disable all filters */
  	if ((dev->flags & IFF_PROMISC) ||
  	    (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC)) {
  		mlx4_en_set_promisc_mode(priv, mdev);
  		goto out;
  	}
  
  	/* Not in promiscuous mode */
  	if (priv->flags & MLX4_EN_FLAG_PROMISC)
  		mlx4_en_clear_promisc_mode(priv, mdev);
  
  	mlx4_en_do_multicast(priv, dev, mdev);
  out:
  	mutex_unlock(&mdev->state_lock);
  }
  
  static int mlx4_en_set_rss_steer_rules(struct mlx4_en_priv *priv)
  {
  	u64 reg_id;
  	int err = 0;
  	int *qpn = &priv->base_qpn;
  	struct mlx4_mac_entry *entry;
  
  	err = mlx4_en_uc_steer_add(priv, priv->dev->dev_addr, qpn, &reg_id);
  	if (err)
  		return err;
  
  	err = mlx4_en_tunnel_steer_add(priv, priv->dev->dev_addr, *qpn,
  				       &priv->tunnel_reg_id);
  	if (err)
  		goto tunnel_err;
  
  	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
  	if (!entry) {
  		err = -ENOMEM;
  		goto alloc_err;
  	}
  
  	memcpy(entry->mac, priv->dev->dev_addr, sizeof(entry->mac));
  	memcpy(priv->current_mac, entry->mac, sizeof(priv->current_mac));
  	entry->reg_id = reg_id;
  	hlist_add_head_rcu(&entry->hlist,
  			   &priv->mac_hash[entry->mac[MLX4_EN_MAC_HASH_IDX]]);
  
  	return 0;
  
  alloc_err:
  	if (priv->tunnel_reg_id)
  		mlx4_flow_detach(priv->mdev->dev, priv->tunnel_reg_id);
  
  tunnel_err:
  	mlx4_en_uc_steer_release(priv, priv->dev->dev_addr, *qpn, reg_id);
  	return err;
  }
  
  static void mlx4_en_delete_rss_steer_rules(struct mlx4_en_priv *priv)
  {
  	u64 mac;
  	unsigned int i;
  	int qpn = priv->base_qpn;
  	struct hlist_head *bucket;
  	struct hlist_node *tmp;
  	struct mlx4_mac_entry *entry;
  
  	for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
  		bucket = &priv->mac_hash[i];
  		hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
  			mac = mlx4_mac_to_u64(entry->mac);
  			en_dbg(DRV, priv, "Registering MAC:%pM for deleting\n",
  			       entry->mac);
  			mlx4_en_uc_steer_release(priv, entry->mac,
  						 qpn, entry->reg_id);
  
  			mlx4_unregister_mac(priv->mdev->dev, priv->port, mac);
  			hlist_del_rcu(&entry->hlist);
  			kfree_rcu(entry, rcu);
  		}
  	}
  
  	if (priv->tunnel_reg_id) {
  		mlx4_flow_detach(priv->mdev->dev, priv->tunnel_reg_id);
  		priv->tunnel_reg_id = 0;
  	}
  }
  
  static void mlx4_en_tx_timeout(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int i;
  
  	if (netif_msg_timer(priv))
  		en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
  
  	for (i = 0; i < priv->tx_ring_num[TX]; i++) {
  		struct mlx4_en_tx_ring *tx_ring = priv->tx_ring[TX][i];
  
  		if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, i)))
  			continue;
  		en_warn(priv, "TX timeout on queue: %d, QP: 0x%x, CQ: 0x%x, Cons: 0x%x, Prod: 0x%x\n",
  			i, tx_ring->qpn, tx_ring->sp_cqn,
  			tx_ring->cons, tx_ring->prod);
  	}
  
  	priv->port_stats.tx_timeout++;
  	en_dbg(DRV, priv, "Scheduling watchdog\n");
  	queue_work(mdev->workqueue, &priv->watchdog_task);
  }
  
  
  static void
  mlx4_en_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  
  	spin_lock_bh(&priv->stats_lock);
  	mlx4_en_fold_software_stats(dev);
  	netdev_stats_to_stats64(stats, &dev->stats);
  	spin_unlock_bh(&priv->stats_lock);
  }
  
  static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
  {
  	struct mlx4_en_cq *cq;
  	int i, t;
  
  	/* If we haven't received a specific coalescing setting
  	 * (module param), we set the moderation parameters as follows:
  	 * - moder_cnt is set to the number of mtu sized packets to
  	 *   satisfy our coalescing target.
  	 * - moder_time is set to a fixed value.
  	 */
  	priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
  	priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
  	priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
  	priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
  	en_dbg(INTR, priv, "Default coalescing params for mtu:%d - rx_frames:%d rx_usecs:%d\n",
  	       priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
  
  	/* Setup cq moderation params */
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		cq = priv->rx_cq[i];
  		cq->moder_cnt = priv->rx_frames;
  		cq->moder_time = priv->rx_usecs;
  		priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
  		priv->last_moder_packets[i] = 0;
  		priv->last_moder_bytes[i] = 0;
  	}
  
  	for (t = 0 ; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		for (i = 0; i < priv->tx_ring_num[t]; i++) {
  			cq = priv->tx_cq[t][i];
  			cq->moder_cnt = priv->tx_frames;
  			cq->moder_time = priv->tx_usecs;
  		}
  	}
  
  	/* Reset auto-moderation params */
  	priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
  	priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
  	priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
  	priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
  	priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
  	priv->adaptive_rx_coal = 1;
  	priv->last_moder_jiffies = 0;
  	priv->last_moder_tx_packets = 0;
  }
  
  static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
  {
  	unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
  	u32 pkt_rate_high, pkt_rate_low;
  	struct mlx4_en_cq *cq;
  	unsigned long packets;
  	unsigned long rate;
  	unsigned long avg_pkt_size;
  	unsigned long rx_packets;
  	unsigned long rx_bytes;
  	unsigned long rx_pkt_diff;
  	int moder_time;
  	int ring, err;
  
  	if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
  		return;
  
  	pkt_rate_low = READ_ONCE(priv->pkt_rate_low);
  	pkt_rate_high = READ_ONCE(priv->pkt_rate_high);
  
  	for (ring = 0; ring < priv->rx_ring_num; ring++) {
  		rx_packets = READ_ONCE(priv->rx_ring[ring]->packets);
  		rx_bytes = READ_ONCE(priv->rx_ring[ring]->bytes);
  
  		rx_pkt_diff = rx_packets - priv->last_moder_packets[ring];
  		packets = rx_pkt_diff;
  		rate = packets * HZ / period;
  		avg_pkt_size = packets ? (rx_bytes -
  				priv->last_moder_bytes[ring]) / packets : 0;
  
  		/* Apply auto-moderation only when packet rate
  		 * exceeds a rate that it matters */
  		if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
  		    avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
  			if (rate <= pkt_rate_low)
  				moder_time = priv->rx_usecs_low;
  			else if (rate >= pkt_rate_high)
  				moder_time = priv->rx_usecs_high;
  			else
  				moder_time = (rate - pkt_rate_low) *
  					(priv->rx_usecs_high - priv->rx_usecs_low) /
  					(pkt_rate_high - pkt_rate_low) +
  					priv->rx_usecs_low;
  		} else {
  			moder_time = priv->rx_usecs_low;
  		}
  
  		cq = priv->rx_cq[ring];
  		if (moder_time != priv->last_moder_time[ring] ||
  		    cq->moder_cnt != priv->rx_frames) {
  			priv->last_moder_time[ring] = moder_time;
  			cq->moder_time = moder_time;
  			cq->moder_cnt = priv->rx_frames;
  			err = mlx4_en_set_cq_moder(priv, cq);
  			if (err)
  				en_err(priv, "Failed modifying moderation for cq:%d\n",
  				       ring);
  		}
  		priv->last_moder_packets[ring] = rx_packets;
  		priv->last_moder_bytes[ring] = rx_bytes;
  	}
  
  	priv->last_moder_jiffies = jiffies;
  }
  
  static void mlx4_en_do_get_stats(struct work_struct *work)
  {
  	struct delayed_work *delay = to_delayed_work(work);
  	struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
  						 stats_task);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int err;
  
  	mutex_lock(&mdev->state_lock);
  	if (mdev->device_up) {
  		if (priv->port_up) {
  			err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
  			if (err)
  				en_dbg(HW, priv, "Could not update stats\n");
  
  			mlx4_en_auto_moderation(priv);
  		}
  
  		queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
  	}
  	if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
  		mlx4_en_do_set_mac(priv, priv->current_mac);
  		mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
  	}
  	mutex_unlock(&mdev->state_lock);
  }
  
  /* mlx4_en_service_task - Run service task for tasks that needed to be done
   * periodically
   */
  static void mlx4_en_service_task(struct work_struct *work)
  {
  	struct delayed_work *delay = to_delayed_work(work);
  	struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
  						 service_task);
  	struct mlx4_en_dev *mdev = priv->mdev;
  
  	mutex_lock(&mdev->state_lock);
  	if (mdev->device_up) {
  		if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
  			mlx4_en_ptp_overflow_check(mdev);
  
  		mlx4_en_recover_from_oom(priv);
  		queue_delayed_work(mdev->workqueue, &priv->service_task,
  				   SERVICE_TASK_DELAY);
  	}
  	mutex_unlock(&mdev->state_lock);
  }
  
  static void mlx4_en_linkstate(struct work_struct *work)
  {
  	struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
  						 linkstate_task);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int linkstate = priv->link_state;
  
  	mutex_lock(&mdev->state_lock);
  	/* If observable port state changed set carrier state and
  	 * report to system log */
  	if (priv->last_link_state != linkstate) {
  		if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
  			en_info(priv, "Link Down\n");
  			netif_carrier_off(priv->dev);
  		} else {
  			en_info(priv, "Link Up\n");
  			netif_carrier_on(priv->dev);
  		}
  	}
  	priv->last_link_state = linkstate;
  	mutex_unlock(&mdev->state_lock);
  }
  
  static int mlx4_en_init_affinity_hint(struct mlx4_en_priv *priv, int ring_idx)
  {
  	struct mlx4_en_rx_ring *ring = priv->rx_ring[ring_idx];
  	int numa_node = priv->mdev->dev->numa_node;
  
  	if (!zalloc_cpumask_var(&ring->affinity_mask, GFP_KERNEL))
  		return -ENOMEM;
  
  	cpumask_set_cpu(cpumask_local_spread(ring_idx, numa_node),
  			ring->affinity_mask);
  	return 0;
  }
  
  static void mlx4_en_free_affinity_hint(struct mlx4_en_priv *priv, int ring_idx)
  {
  	free_cpumask_var(priv->rx_ring[ring_idx]->affinity_mask);
  }
  
  static void mlx4_en_init_recycle_ring(struct mlx4_en_priv *priv,
  				      int tx_ring_idx)
  {
  	struct mlx4_en_tx_ring *tx_ring = priv->tx_ring[TX_XDP][tx_ring_idx];
  	int rr_index = tx_ring_idx;
  
  	tx_ring->free_tx_desc = mlx4_en_recycle_tx_desc;
  	tx_ring->recycle_ring = priv->rx_ring[rr_index];
  	en_dbg(DRV, priv, "Set tx_ring[%d][%d]->recycle_ring = rx_ring[%d]\n",
  	       TX_XDP, tx_ring_idx, rr_index);
  }
  
  int mlx4_en_start_port(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_en_cq *cq;
  	struct mlx4_en_tx_ring *tx_ring;
  	int rx_index = 0;
  	int err = 0;
  	int i, t;
  	int j;
  	u8 mc_list[16] = {0};
  
  	if (priv->port_up) {
  		en_dbg(DRV, priv, "start port called while port already up\n");
  		return 0;
  	}
  
  	INIT_LIST_HEAD(&priv->mc_list);
  	INIT_LIST_HEAD(&priv->curr_list);
  	INIT_LIST_HEAD(&priv->ethtool_list);
  	memset(&priv->ethtool_rules[0], 0,
  	       sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
  
  	/* Calculate Rx buf size */
  	dev->mtu = min(dev->mtu, priv->max_mtu);
  	mlx4_en_calc_rx_buf(dev);
  	en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
  
  	/* Configure rx cq's and rings */
  	err = mlx4_en_activate_rx_rings(priv);
  	if (err) {
  		en_err(priv, "Failed to activate RX rings\n");
  		return err;
  	}
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		cq = priv->rx_cq[i];
  
  		err = mlx4_en_init_affinity_hint(priv, i);
  		if (err) {
  			en_err(priv, "Failed preparing IRQ affinity hint\n");
  			goto cq_err;
  		}
  
  		err = mlx4_en_activate_cq(priv, cq, i);
  		if (err) {
  			en_err(priv, "Failed activating Rx CQ\n");
  			mlx4_en_free_affinity_hint(priv, i);
  			goto cq_err;
  		}
  
  		for (j = 0; j < cq->size; j++) {
  			struct mlx4_cqe *cqe = NULL;
  
  			cqe = mlx4_en_get_cqe(cq->buf, j, priv->cqe_size) +
  			      priv->cqe_factor;
  			cqe->owner_sr_opcode = MLX4_CQE_OWNER_MASK;
  		}
  
  		err = mlx4_en_set_cq_moder(priv, cq);
  		if (err) {
  			en_err(priv, "Failed setting cq moderation parameters\n");
  			mlx4_en_deactivate_cq(priv, cq);
  			mlx4_en_free_affinity_hint(priv, i);
  			goto cq_err;
  		}
  		mlx4_en_arm_cq(priv, cq);
  		priv->rx_ring[i]->cqn = cq->mcq.cqn;
  		++rx_index;
  	}
  
  	/* Set qp number */
  	en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
  	err = mlx4_en_get_qp(priv);
  	if (err) {
  		en_err(priv, "Failed getting eth qp\n");
  		goto cq_err;
  	}
  	mdev->mac_removed[priv->port] = 0;
  
  	priv->counter_index =
  			mlx4_get_default_counter_index(mdev->dev, priv->port);
  
  	err = mlx4_en_config_rss_steer(priv);
  	if (err) {
  		en_err(priv, "Failed configuring rss steering\n");
  		goto mac_err;
  	}
  
  	err = mlx4_en_create_drop_qp(priv);
  	if (err)
  		goto rss_err;
  
  	/* Configure tx cq's and rings */
  	for (t = 0 ; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		u8 num_tx_rings_p_up = t == TX ?
  			priv->num_tx_rings_p_up : priv->tx_ring_num[t];
  
  		for (i = 0; i < priv->tx_ring_num[t]; i++) {
  			/* Configure cq */
  			cq = priv->tx_cq[t][i];
  			err = mlx4_en_activate_cq(priv, cq, i);
  			if (err) {
  				en_err(priv, "Failed allocating Tx CQ\n");
  				goto tx_err;
  			}
  			err = mlx4_en_set_cq_moder(priv, cq);
  			if (err) {
  				en_err(priv, "Failed setting cq moderation parameters\n");
  				mlx4_en_deactivate_cq(priv, cq);
  				goto tx_err;
  			}
  			en_dbg(DRV, priv,
  			       "Resetting index of collapsed CQ:%d to -1\n", i);
  			cq->buf->wqe_index = cpu_to_be16(0xffff);
  
  			/* Configure ring */
  			tx_ring = priv->tx_ring[t][i];
  			err = mlx4_en_activate_tx_ring(priv, tx_ring,
  						       cq->mcq.cqn,
  						       i / num_tx_rings_p_up);
  			if (err) {
  				en_err(priv, "Failed allocating Tx ring\n");
  				mlx4_en_deactivate_cq(priv, cq);
  				goto tx_err;
  			}
  			if (t != TX_XDP) {
  				tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
  				tx_ring->recycle_ring = NULL;
  
  				/* Arm CQ for TX completions */
  				mlx4_en_arm_cq(priv, cq);
  
  			} else {
  				mlx4_en_init_tx_xdp_ring_descs(priv, tx_ring);
  				mlx4_en_init_recycle_ring(priv, i);
  				/* XDP TX CQ should never be armed */
  			}
  
  			/* Set initial ownership of all Tx TXBBs to SW (1) */
  			for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
  				*((u32 *)(tx_ring->buf + j)) = 0xffffffff;
  		}
  	}
  
  	/* Configure port */
  	err = mlx4_SET_PORT_general(mdev->dev, priv->port,
  				    priv->rx_skb_size + ETH_FCS_LEN,
  				    priv->prof->tx_pause,
  				    priv->prof->tx_ppp,
  				    priv->prof->rx_pause,
  				    priv->prof->rx_ppp);
  	if (err) {
  		en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
  		       priv->port, err);
  		goto tx_err;
  	}
  
  	err = mlx4_SET_PORT_user_mtu(mdev->dev, priv->port, dev->mtu);
  	if (err) {
  		en_err(priv, "Failed to pass user MTU(%d) to Firmware for port %d, with error %d\n",
  		       dev->mtu, priv->port, err);
  		goto tx_err;
  	}
  
  	/* Set default qp number */
  	err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
  	if (err) {
  		en_err(priv, "Failed setting default qp numbers\n");
  		goto tx_err;
  	}
  
  	if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
  		err = mlx4_SET_PORT_VXLAN(mdev->dev, priv->port, VXLAN_STEER_BY_OUTER_MAC, 1);
  		if (err) {
  			en_err(priv, "Failed setting port L2 tunnel configuration, err %d\n",
  			       err);
  			goto tx_err;
  		}
  	}
  
  	/* Init port */
  	en_dbg(HW, priv, "Initializing port\n");
  	err = mlx4_INIT_PORT(mdev->dev, priv->port);
  	if (err) {
  		en_err(priv, "Failed Initializing port\n");
  		goto tx_err;
  	}
  
  	/* Set Unicast and VXLAN steering rules */
  	if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0 &&
  	    mlx4_en_set_rss_steer_rules(priv))
  		mlx4_warn(mdev, "Failed setting steering rules\n");
  
  	/* Attach rx QP to bradcast address */
  	eth_broadcast_addr(&mc_list[10]);
  	mc_list[5] = priv->port; /* needed for B0 steering support */
  	if (mlx4_multicast_attach(mdev->dev, priv->rss_map.indir_qp, mc_list,
  				  priv->port, 0, MLX4_PROT_ETH,
  				  &priv->broadcast_id))
  		mlx4_warn(mdev, "Failed Attaching Broadcast\n");
  
  	/* Must redo promiscuous mode setup. */
  	priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
  
  	/* Schedule multicast task to populate multicast list */
  	queue_work(mdev->workqueue, &priv->rx_mode_task);
  
  	if (priv->mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
  		udp_tunnel_get_rx_info(dev);
  
  	priv->port_up = true;
  
  	/* Process all completions if exist to prevent
  	 * the queues freezing if they are full
  	 */
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		local_bh_disable();
  		napi_schedule(&priv->rx_cq[i]->napi);
  		local_bh_enable();
  	}
  
  	netif_tx_start_all_queues(dev);
  	netif_device_attach(dev);
  
  	return 0;
  
  tx_err:
  	if (t == MLX4_EN_NUM_TX_TYPES) {
  		t--;
  		i = priv->tx_ring_num[t];
  	}
  	while (t >= 0) {
  		while (i--) {
  			mlx4_en_deactivate_tx_ring(priv, priv->tx_ring[t][i]);
  			mlx4_en_deactivate_cq(priv, priv->tx_cq[t][i]);
  		}
  		if (!t--)
  			break;
  		i = priv->tx_ring_num[t];
  	}
  	mlx4_en_destroy_drop_qp(priv);
  rss_err:
  	mlx4_en_release_rss_steer(priv);
  mac_err:
  	mlx4_en_put_qp(priv);
  cq_err:
  	while (rx_index--) {
  		mlx4_en_deactivate_cq(priv, priv->rx_cq[rx_index]);
  		mlx4_en_free_affinity_hint(priv, rx_index);
  	}
  	for (i = 0; i < priv->rx_ring_num; i++)
  		mlx4_en_deactivate_rx_ring(priv, priv->rx_ring[i]);
  
  	return err; /* need to close devices */
  }
  
  
  void mlx4_en_stop_port(struct net_device *dev, int detach)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_en_mc_list *mclist, *tmp;
  	struct ethtool_flow_id *flow, *tmp_flow;
  	int i, t;
  	u8 mc_list[16] = {0};
  
  	if (!priv->port_up) {
  		en_dbg(DRV, priv, "stop port called while port already down\n");
  		return;
  	}
  
  	/* close port*/
  	mlx4_CLOSE_PORT(mdev->dev, priv->port);
  
  	/* Synchronize with tx routine */
  	netif_tx_lock_bh(dev);
  	if (detach)
  		netif_device_detach(dev);
  	netif_tx_stop_all_queues(dev);
  	netif_tx_unlock_bh(dev);
  
  	netif_tx_disable(dev);
  
  	spin_lock_bh(&priv->stats_lock);
  	mlx4_en_fold_software_stats(dev);
  	/* Set port as not active */
  	priv->port_up = false;
  	spin_unlock_bh(&priv->stats_lock);
  
  	priv->counter_index = MLX4_SINK_COUNTER_INDEX(mdev->dev);
  
  	/* Promsicuous mode */
  	if (mdev->dev->caps.steering_mode ==
  	    MLX4_STEERING_MODE_DEVICE_MANAGED) {
  		priv->flags &= ~(MLX4_EN_FLAG_PROMISC |
  				 MLX4_EN_FLAG_MC_PROMISC);
  		mlx4_flow_steer_promisc_remove(mdev->dev,
  					       priv->port,
  					       MLX4_FS_ALL_DEFAULT);
  		mlx4_flow_steer_promisc_remove(mdev->dev,
  					       priv->port,
  					       MLX4_FS_MC_DEFAULT);
  	} else if (priv->flags & MLX4_EN_FLAG_PROMISC) {
  		priv->flags &= ~MLX4_EN_FLAG_PROMISC;
  
  		/* Disable promiscouos mode */
  		mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
  					    priv->port);
  
  		/* Disable Multicast promisc */
  		if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
  			mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
  						      priv->port);
  			priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
  		}
  	}
  
  	/* Detach All multicasts */
  	eth_broadcast_addr(&mc_list[10]);
  	mc_list[5] = priv->port; /* needed for B0 steering support */
  	mlx4_multicast_detach(mdev->dev, priv->rss_map.indir_qp, mc_list,
  			      MLX4_PROT_ETH, priv->broadcast_id);
  	list_for_each_entry(mclist, &priv->curr_list, list) {
  		memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
  		mc_list[5] = priv->port;
  		mlx4_multicast_detach(mdev->dev, priv->rss_map.indir_qp,
  				      mc_list, MLX4_PROT_ETH, mclist->reg_id);
  		if (mclist->tunnel_reg_id)
  			mlx4_flow_detach(mdev->dev, mclist->tunnel_reg_id);
  	}
  	mlx4_en_clear_list(dev);
  	list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
  		list_del(&mclist->list);
  		kfree(mclist);
  	}
  
  	/* Flush multicast filter */
  	mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
  
  	/* Remove flow steering rules for the port*/
  	if (mdev->dev->caps.steering_mode ==
  	    MLX4_STEERING_MODE_DEVICE_MANAGED) {
  		ASSERT_RTNL();
  		list_for_each_entry_safe(flow, tmp_flow,
  					 &priv->ethtool_list, list) {
  			mlx4_flow_detach(mdev->dev, flow->id);
  			list_del(&flow->list);
  		}
  	}
  
  	mlx4_en_destroy_drop_qp(priv);
  
  	/* Free TX Rings */
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		for (i = 0; i < priv->tx_ring_num[t]; i++) {
  			mlx4_en_deactivate_tx_ring(priv, priv->tx_ring[t][i]);
  			mlx4_en_deactivate_cq(priv, priv->tx_cq[t][i]);
  		}
  	}
  	msleep(10);
  
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++)
  		for (i = 0; i < priv->tx_ring_num[t]; i++)
  			mlx4_en_free_tx_buf(dev, priv->tx_ring[t][i]);
  
  	if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
  		mlx4_en_delete_rss_steer_rules(priv);
  
  	/* Free RSS qps */
  	mlx4_en_release_rss_steer(priv);
  
  	/* Unregister Mac address for the port */
  	mlx4_en_put_qp(priv);
  	if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_REASSIGN_MAC_EN))
  		mdev->mac_removed[priv->port] = 1;
  
  	/* Free RX Rings */
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		struct mlx4_en_cq *cq = priv->rx_cq[i];
  
  		napi_synchronize(&cq->napi);
  		mlx4_en_deactivate_rx_ring(priv, priv->rx_ring[i]);
  		mlx4_en_deactivate_cq(priv, cq);
  
  		mlx4_en_free_affinity_hint(priv, i);
  	}
  }
  
  static void mlx4_en_restart(struct work_struct *work)
  {
  	struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
  						 watchdog_task);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct net_device *dev = priv->dev;
  
  	en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
  
  	rtnl_lock();
  	mutex_lock(&mdev->state_lock);
  	if (priv->port_up) {
  		mlx4_en_stop_port(dev, 1);
  		if (mlx4_en_start_port(dev))
  			en_err(priv, "Failed restarting port %d\n", priv->port);
  	}
  	mutex_unlock(&mdev->state_lock);
  	rtnl_unlock();
  }
  
  static void mlx4_en_clear_stats(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_en_tx_ring **tx_ring;
  	int i;
  
  	if (!mlx4_is_slave(mdev->dev))
  		if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
  			en_dbg(HW, priv, "Failed dumping statistics\n");
  
  	memset(&priv->pstats, 0, sizeof(priv->pstats));
  	memset(&priv->pkstats, 0, sizeof(priv->pkstats));
  	memset(&priv->port_stats, 0, sizeof(priv->port_stats));
  	memset(&priv->rx_flowstats, 0, sizeof(priv->rx_flowstats));
  	memset(&priv->tx_flowstats, 0, sizeof(priv->tx_flowstats));
  	memset(&priv->rx_priority_flowstats, 0,
  	       sizeof(priv->rx_priority_flowstats));
  	memset(&priv->tx_priority_flowstats, 0,
  	       sizeof(priv->tx_priority_flowstats));
  	memset(&priv->pf_stats, 0, sizeof(priv->pf_stats));
  
  	tx_ring = priv->tx_ring[TX];
  	for (i = 0; i < priv->tx_ring_num[TX]; i++) {
  		tx_ring[i]->bytes = 0;
  		tx_ring[i]->packets = 0;
  		tx_ring[i]->tx_csum = 0;
  		tx_ring[i]->tx_dropped = 0;
  		tx_ring[i]->queue_stopped = 0;
  		tx_ring[i]->wake_queue = 0;
  		tx_ring[i]->tso_packets = 0;
  		tx_ring[i]->xmit_more = 0;
  	}
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		priv->rx_ring[i]->bytes = 0;
  		priv->rx_ring[i]->packets = 0;
  		priv->rx_ring[i]->csum_ok = 0;
  		priv->rx_ring[i]->csum_none = 0;
  		priv->rx_ring[i]->csum_complete = 0;
  	}
  }
  
  static int mlx4_en_open(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int err = 0;
  
  	mutex_lock(&mdev->state_lock);
  
  	if (!mdev->device_up) {
  		en_err(priv, "Cannot open - device down/disabled\n");
  		err = -EBUSY;
  		goto out;
  	}
  
  	/* Reset HW statistics and SW counters */
  	mlx4_en_clear_stats(dev);
  
  	err = mlx4_en_start_port(dev);
  	if (err)
  		en_err(priv, "Failed starting port:%d\n", priv->port);
  
  out:
  	mutex_unlock(&mdev->state_lock);
  	return err;
  }
  
  
  static int mlx4_en_close(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  
  	en_dbg(IFDOWN, priv, "Close port called\n");
  
  	mutex_lock(&mdev->state_lock);
  
  	mlx4_en_stop_port(dev, 0);
  	netif_carrier_off(dev);
  
  	mutex_unlock(&mdev->state_lock);
  	return 0;
  }
  
  static void mlx4_en_free_resources(struct mlx4_en_priv *priv)
  {
  	int i, t;
  
  #ifdef CONFIG_RFS_ACCEL
  	priv->dev->rx_cpu_rmap = NULL;
  #endif
  
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		for (i = 0; i < priv->tx_ring_num[t]; i++) {
  			if (priv->tx_ring[t] && priv->tx_ring[t][i])
  				mlx4_en_destroy_tx_ring(priv,
  							&priv->tx_ring[t][i]);
  			if (priv->tx_cq[t] && priv->tx_cq[t][i])
  				mlx4_en_destroy_cq(priv, &priv->tx_cq[t][i]);
  		}
  		kfree(priv->tx_ring[t]);
  		kfree(priv->tx_cq[t]);
  	}
  
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		if (priv->rx_ring[i])
  			mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
  				priv->prof->rx_ring_size, priv->stride);
  		if (priv->rx_cq[i])
  			mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
  	}
  
  }
  
  static int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
  {
  	struct mlx4_en_port_profile *prof = priv->prof;
  	int i, t;
  	int node;
  
  	/* Create tx Rings */
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		for (i = 0; i < priv->tx_ring_num[t]; i++) {
  			node = cpu_to_node(i % num_online_cpus());
  			if (mlx4_en_create_cq(priv, &priv->tx_cq[t][i],
  					      prof->tx_ring_size, i, t, node))
  				goto err;
  
  			if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[t][i],
  						   prof->tx_ring_size,
  						   TXBB_SIZE, node, i))
  				goto err;
  		}
  	}
  
  	/* Create rx Rings */
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		node = cpu_to_node(i % num_online_cpus());
  		if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
  				      prof->rx_ring_size, i, RX, node))
  			goto err;
  
  		if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
  					   prof->rx_ring_size, priv->stride,
  					   node, i))
  			goto err;
  
  	}
  
  #ifdef CONFIG_RFS_ACCEL
  	priv->dev->rx_cpu_rmap = mlx4_get_cpu_rmap(priv->mdev->dev, priv->port);
  #endif
  
  	return 0;
  
  err:
  	en_err(priv, "Failed to allocate NIC resources\n");
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		if (priv->rx_ring[i])
  			mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
  						prof->rx_ring_size,
  						priv->stride);
  		if (priv->rx_cq[i])
  			mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
  	}
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		for (i = 0; i < priv->tx_ring_num[t]; i++) {
  			if (priv->tx_ring[t][i])
  				mlx4_en_destroy_tx_ring(priv,
  							&priv->tx_ring[t][i]);
  			if (priv->tx_cq[t][i])
  				mlx4_en_destroy_cq(priv, &priv->tx_cq[t][i]);
  		}
  	}
  	return -ENOMEM;
  }
  
  
  static int mlx4_en_copy_priv(struct mlx4_en_priv *dst,
  			     struct mlx4_en_priv *src,
  			     struct mlx4_en_port_profile *prof)
  {
  	int t;
  
  	memcpy(&dst->hwtstamp_config, &prof->hwtstamp_config,
  	       sizeof(dst->hwtstamp_config));
  	dst->num_tx_rings_p_up = prof->num_tx_rings_p_up;
  	dst->rx_ring_num = prof->rx_ring_num;
  	dst->flags = prof->flags;
  	dst->mdev = src->mdev;
  	dst->port = src->port;
  	dst->dev = src->dev;
  	dst->prof = prof;
  	dst->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
  					 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
  
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		dst->tx_ring_num[t] = prof->tx_ring_num[t];
  		if (!dst->tx_ring_num[t])
  			continue;
  
  		dst->tx_ring[t] = kcalloc(MAX_TX_RINGS,
  					  sizeof(struct mlx4_en_tx_ring *),
  					  GFP_KERNEL);
  		if (!dst->tx_ring[t])
  			goto err_free_tx;
  
  		dst->tx_cq[t] = kcalloc(MAX_TX_RINGS,
  					sizeof(struct mlx4_en_cq *),
  					GFP_KERNEL);
  		if (!dst->tx_cq[t]) {
  			kfree(dst->tx_ring[t]);
  			goto err_free_tx;
  		}
  	}
  
  	return 0;
  
  err_free_tx:
  	while (t--) {
  		kfree(dst->tx_ring[t]);
  		kfree(dst->tx_cq[t]);
  	}
  	return -ENOMEM;
  }
  
  static void mlx4_en_update_priv(struct mlx4_en_priv *dst,
  				struct mlx4_en_priv *src)
  {
  	int t;
  	memcpy(dst->rx_ring, src->rx_ring,
  	       sizeof(struct mlx4_en_rx_ring *) * src->rx_ring_num);
  	memcpy(dst->rx_cq, src->rx_cq,
  	       sizeof(struct mlx4_en_cq *) * src->rx_ring_num);
  	memcpy(&dst->hwtstamp_config, &src->hwtstamp_config,
  	       sizeof(dst->hwtstamp_config));
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		dst->tx_ring_num[t] = src->tx_ring_num[t];
  		dst->tx_ring[t] = src->tx_ring[t];
  		dst->tx_cq[t] = src->tx_cq[t];
  	}
  	dst->num_tx_rings_p_up = src->num_tx_rings_p_up;
  	dst->rx_ring_num = src->rx_ring_num;
  	memcpy(dst->prof, src->prof, sizeof(struct mlx4_en_port_profile));
  }
  
  int mlx4_en_try_alloc_resources(struct mlx4_en_priv *priv,
  				struct mlx4_en_priv *tmp,
  				struct mlx4_en_port_profile *prof,
  				bool carry_xdp_prog)
  {
  	struct bpf_prog *xdp_prog;
  	int i, t;
  
  	mlx4_en_copy_priv(tmp, priv, prof);
  
  	if (mlx4_en_alloc_resources(tmp)) {
  		en_warn(priv,
  			"%s: Resource allocation failed, using previous configuration\n",
  			__func__);
  		for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  			kfree(tmp->tx_ring[t]);
  			kfree(tmp->tx_cq[t]);
  		}
  		return -ENOMEM;
  	}
  
  	/* All rx_rings has the same xdp_prog.  Pick the first one. */
  	xdp_prog = rcu_dereference_protected(
  		priv->rx_ring[0]->xdp_prog,
  		lockdep_is_held(&priv->mdev->state_lock));
  
  	if (xdp_prog && carry_xdp_prog) {
  		xdp_prog = bpf_prog_add(xdp_prog, tmp->rx_ring_num);
  		if (IS_ERR(xdp_prog)) {
  			mlx4_en_free_resources(tmp);
  			return PTR_ERR(xdp_prog);
  		}
  		for (i = 0; i < tmp->rx_ring_num; i++)
  			rcu_assign_pointer(tmp->rx_ring[i]->xdp_prog,
  					   xdp_prog);
  	}
  
  	return 0;
  }
  
  void mlx4_en_safe_replace_resources(struct mlx4_en_priv *priv,
  				    struct mlx4_en_priv *tmp)
  {
  	mlx4_en_free_resources(priv);
  	mlx4_en_update_priv(priv, tmp);
  }
  
  void mlx4_en_destroy_netdev(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  
  	en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
  
  	/* Unregister device - this will close the port if it was up */
  	if (priv->registered) {
  		devlink_port_type_clear(mlx4_get_devlink_port(mdev->dev,
  							      priv->port));
  		unregister_netdev(dev);
  	}
  
  	if (priv->allocated)
  		mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
  
  	cancel_delayed_work(&priv->stats_task);
  	cancel_delayed_work(&priv->service_task);
  	/* flush any pending task for this netdev */
  	flush_workqueue(mdev->workqueue);
  
  	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
  		mlx4_en_remove_timestamp(mdev);
  
  	/* Detach the netdev so tasks would not attempt to access it */
  	mutex_lock(&mdev->state_lock);
  	mdev->pndev[priv->port] = NULL;
  	mdev->upper[priv->port] = NULL;
  
  #ifdef CONFIG_RFS_ACCEL
  	mlx4_en_cleanup_filters(priv);
  #endif
  
  	mlx4_en_free_resources(priv);
  	mutex_unlock(&mdev->state_lock);
  
  	free_netdev(dev);
  }
  
  static bool mlx4_en_check_xdp_mtu(struct net_device *dev, int mtu)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  
  	if (mtu > MLX4_EN_MAX_XDP_MTU) {
  		en_err(priv, "mtu:%d > max:%d when XDP prog is attached\n",
  		       mtu, MLX4_EN_MAX_XDP_MTU);
  		return false;
  	}
  
  	return true;
  }
  
  static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	int err = 0;
  
  	en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
  		 dev->mtu, new_mtu);
  
  	if (priv->tx_ring_num[TX_XDP] &&
  	    !mlx4_en_check_xdp_mtu(dev, new_mtu))
  		return -EOPNOTSUPP;
  
  	dev->mtu = new_mtu;
  
  	if (netif_running(dev)) {
  		mutex_lock(&mdev->state_lock);
  		if (!mdev->device_up) {
  			/* NIC is probably restarting - let watchdog task reset
  			 * the port */
  			en_dbg(DRV, priv, "Change MTU called with card down!?\n");
  		} else {
  			mlx4_en_stop_port(dev, 1);
  			err = mlx4_en_start_port(dev);
  			if (err) {
  				en_err(priv, "Failed restarting port:%d\n",
  					 priv->port);
  				queue_work(mdev->workqueue, &priv->watchdog_task);
  			}
  		}
  		mutex_unlock(&mdev->state_lock);
  	}
  	return 0;
  }
  
  static int mlx4_en_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct hwtstamp_config config;
  
  	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
  		return -EFAULT;
  
  	/* reserved for future extensions */
  	if (config.flags)
  		return -EINVAL;
  
  	/* device doesn't support time stamping */
  	if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS))
  		return -EINVAL;
  
  	/* TX HW timestamp */
  	switch (config.tx_type) {
  	case HWTSTAMP_TX_OFF:
  	case HWTSTAMP_TX_ON:
  		break;
  	default:
  		return -ERANGE;
  	}
  
  	/* RX HW timestamp */
  	switch (config.rx_filter) {
  	case HWTSTAMP_FILTER_NONE:
  		break;
  	case HWTSTAMP_FILTER_ALL:
  	case HWTSTAMP_FILTER_SOME:
  	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
  	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
  	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
  	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
  	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
  	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
  	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
  	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
  	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
  	case HWTSTAMP_FILTER_PTP_V2_EVENT:
  	case HWTSTAMP_FILTER_PTP_V2_SYNC:
  	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
  	case HWTSTAMP_FILTER_NTP_ALL:
  		config.rx_filter = HWTSTAMP_FILTER_ALL;
  		break;
  	default:
  		return -ERANGE;
  	}
  
  	if (mlx4_en_reset_config(dev, config, dev->features)) {
  		config.tx_type = HWTSTAMP_TX_OFF;
  		config.rx_filter = HWTSTAMP_FILTER_NONE;
  	}
  
  	return copy_to_user(ifr->ifr_data, &config,
  			    sizeof(config)) ? -EFAULT : 0;
  }
  
  static int mlx4_en_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  
  	return copy_to_user(ifr->ifr_data, &priv->hwtstamp_config,
  			    sizeof(priv->hwtstamp_config)) ? -EFAULT : 0;
  }
  
  static int mlx4_en_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  {
  	switch (cmd) {
  	case SIOCSHWTSTAMP:
  		return mlx4_en_hwtstamp_set(dev, ifr);
  	case SIOCGHWTSTAMP:
  		return mlx4_en_hwtstamp_get(dev, ifr);
  	default:
  		return -EOPNOTSUPP;
  	}
  }
  
  static netdev_features_t mlx4_en_fix_features(struct net_device *netdev,
  					      netdev_features_t features)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(netdev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	/* Since there is no support for separate RX C-TAG/S-TAG vlan accel
  	 * enable/disable make sure S-TAG flag is always in same state as
  	 * C-TAG.
  	 */
  	if (features & NETIF_F_HW_VLAN_CTAG_RX &&
  	    !(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN))
  		features |= NETIF_F_HW_VLAN_STAG_RX;
  	else
  		features &= ~NETIF_F_HW_VLAN_STAG_RX;
  
  	return features;
  }
  
  static int mlx4_en_set_features(struct net_device *netdev,
  		netdev_features_t features)
  {
  	struct mlx4_en_priv *priv = netdev_priv(netdev);
  	bool reset = false;
  	int ret = 0;
  
  	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_RXFCS)) {
  		en_info(priv, "Turn %s RX-FCS\n",
  			(features & NETIF_F_RXFCS) ? "ON" : "OFF");
  		reset = true;
  	}
  
  	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_RXALL)) {
  		u8 ignore_fcs_value = (features & NETIF_F_RXALL) ? 1 : 0;
  
  		en_info(priv, "Turn %s RX-ALL\n",
  			ignore_fcs_value ? "ON" : "OFF");
  		ret = mlx4_SET_PORT_fcs_check(priv->mdev->dev,
  					      priv->port, ignore_fcs_value);
  		if (ret)
  			return ret;
  	}
  
  	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_CTAG_RX)) {
  		en_info(priv, "Turn %s RX vlan strip offload\n",
  			(features & NETIF_F_HW_VLAN_CTAG_RX) ? "ON" : "OFF");
  		reset = true;
  	}
  
  	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_CTAG_TX))
  		en_info(priv, "Turn %s TX vlan strip offload\n",
  			(features & NETIF_F_HW_VLAN_CTAG_TX) ? "ON" : "OFF");
  
  	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_STAG_TX))
  		en_info(priv, "Turn %s TX S-VLAN strip offload\n",
  			(features & NETIF_F_HW_VLAN_STAG_TX) ? "ON" : "OFF");
  
  	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_LOOPBACK)) {
  		en_info(priv, "Turn %s loopback\n",
  			(features & NETIF_F_LOOPBACK) ? "ON" : "OFF");
  		mlx4_en_update_loopback_state(netdev, features);
  	}
  
  	if (reset) {
  		ret = mlx4_en_reset_config(netdev, priv->hwtstamp_config,
  					   features);
  		if (ret)
  			return ret;
  	}
  
  	return 0;
  }
  
  static int mlx4_en_set_vf_mac(struct net_device *dev, int queue, u8 *mac)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_set_vf_mac(mdev->dev, en_priv->port, queue, mac);
  }
  
  static int mlx4_en_set_vf_vlan(struct net_device *dev, int vf, u16 vlan, u8 qos,
  			       __be16 vlan_proto)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_set_vf_vlan(mdev->dev, en_priv->port, vf, vlan, qos,
  				vlan_proto);
  }
  
  static int mlx4_en_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
  			       int max_tx_rate)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_set_vf_rate(mdev->dev, en_priv->port, vf, min_tx_rate,
  				max_tx_rate);
  }
  
  static int mlx4_en_set_vf_spoofchk(struct net_device *dev, int vf, bool setting)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_set_vf_spoofchk(mdev->dev, en_priv->port, vf, setting);
  }
  
  static int mlx4_en_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivf)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_get_vf_config(mdev->dev, en_priv->port, vf, ivf);
  }
  
  static int mlx4_en_set_vf_link_state(struct net_device *dev, int vf, int link_state)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_set_vf_link_state(mdev->dev, en_priv->port, vf, link_state);
  }
  
  static int mlx4_en_get_vf_stats(struct net_device *dev, int vf,
  				struct ifla_vf_stats *vf_stats)
  {
  	struct mlx4_en_priv *en_priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = en_priv->mdev;
  
  	return mlx4_get_vf_stats(mdev->dev, en_priv->port, vf, vf_stats);
  }
  
  #define PORT_ID_BYTE_LEN 8
  static int mlx4_en_get_phys_port_id(struct net_device *dev,
  				    struct netdev_phys_item_id *ppid)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_dev *mdev = priv->mdev->dev;
  	int i;
  	u64 phys_port_id = mdev->caps.phys_port_id[priv->port];
  
  	if (!phys_port_id)
  		return -EOPNOTSUPP;
  
  	ppid->id_len = sizeof(phys_port_id);
  	for (i = PORT_ID_BYTE_LEN - 1; i >= 0; --i) {
  		ppid->id[i] =  phys_port_id & 0xff;
  		phys_port_id >>= 8;
  	}
  	return 0;
  }
  
  static void mlx4_en_add_vxlan_offloads(struct work_struct *work)
  {
  	int ret;
  	struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
  						 vxlan_add_task);
  
  	ret = mlx4_config_vxlan_port(priv->mdev->dev, priv->vxlan_port);
  	if (ret)
  		goto out;
  
  	ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
  				  VXLAN_STEER_BY_OUTER_MAC, 1);
  out:
  	if (ret) {
  		en_err(priv, "failed setting L2 tunnel configuration ret %d\n", ret);
  		return;
  	}
  
  	/* set offloads */
  	priv->dev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
  				      NETIF_F_RXCSUM |
  				      NETIF_F_TSO | NETIF_F_TSO6 |
  				      NETIF_F_GSO_UDP_TUNNEL |
  				      NETIF_F_GSO_UDP_TUNNEL_CSUM |
  				      NETIF_F_GSO_PARTIAL;
  }
  
  static void mlx4_en_del_vxlan_offloads(struct work_struct *work)
  {
  	int ret;
  	struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
  						 vxlan_del_task);
  	/* unset offloads */
  	priv->dev->hw_enc_features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
  					NETIF_F_RXCSUM |
  					NETIF_F_TSO | NETIF_F_TSO6 |
  					NETIF_F_GSO_UDP_TUNNEL |
  					NETIF_F_GSO_UDP_TUNNEL_CSUM |
  					NETIF_F_GSO_PARTIAL);
  
  	ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
  				  VXLAN_STEER_BY_OUTER_MAC, 0);
  	if (ret)
  		en_err(priv, "failed setting L2 tunnel configuration ret %d\n", ret);
  
  	priv->vxlan_port = 0;
  }
  
  static void mlx4_en_add_vxlan_port(struct  net_device *dev,
  				   struct udp_tunnel_info *ti)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	__be16 port = ti->port;
  	__be16 current_port;
  
  	if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
  		return;
  
  	if (ti->sa_family != AF_INET)
  		return;
  
  	if (priv->mdev->dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
  		return;
  
  	current_port = priv->vxlan_port;
  	if (current_port && current_port != port) {
  		en_warn(priv, "vxlan port %d configured, can't add port %d\n",
  			ntohs(current_port), ntohs(port));
  		return;
  	}
  
  	priv->vxlan_port = port;
  	queue_work(priv->mdev->workqueue, &priv->vxlan_add_task);
  }
  
  static void mlx4_en_del_vxlan_port(struct  net_device *dev,
  				   struct udp_tunnel_info *ti)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	__be16 port = ti->port;
  	__be16 current_port;
  
  	if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
  		return;
  
  	if (ti->sa_family != AF_INET)
  		return;
  
  	if (priv->mdev->dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
  		return;
  
  	current_port = priv->vxlan_port;
  	if (current_port != port) {
  		en_dbg(DRV, priv, "vxlan port %d isn't configured, ignoring\n", ntohs(port));
  		return;
  	}
  
  	queue_work(priv->mdev->workqueue, &priv->vxlan_del_task);
  }
  
  static netdev_features_t mlx4_en_features_check(struct sk_buff *skb,
  						struct net_device *dev,
  						netdev_features_t features)
  {
  	features = vlan_features_check(skb, features);
  	features = vxlan_features_check(skb, features);
  
  	/* The ConnectX-3 doesn't support outer IPv6 checksums but it does
  	 * support inner IPv6 checksums and segmentation so  we need to
  	 * strip that feature if this is an IPv6 encapsulated frame.
  	 */
  	if (skb->encapsulation &&
  	    (skb->ip_summed == CHECKSUM_PARTIAL)) {
  		struct mlx4_en_priv *priv = netdev_priv(dev);
  
  		if (!priv->vxlan_port ||
  		    (ip_hdr(skb)->version != 4) ||
  		    (udp_hdr(skb)->dest != priv->vxlan_port))
  			features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
  	}
  
  	return features;
  }
  
  static int mlx4_en_set_tx_maxrate(struct net_device *dev, int queue_index, u32 maxrate)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_tx_ring *tx_ring = priv->tx_ring[TX][queue_index];
  	struct mlx4_update_qp_params params;
  	int err;
  
  	if (!(priv->mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QP_RATE_LIMIT))
  		return -EOPNOTSUPP;
  
  	/* rate provided to us in Mbs, check if it fits into 12 bits, if not use Gbs */
  	if (maxrate >> 12) {
  		params.rate_unit = MLX4_QP_RATE_LIMIT_GBS;
  		params.rate_val  = maxrate / 1000;
  	} else if (maxrate) {
  		params.rate_unit = MLX4_QP_RATE_LIMIT_MBS;
  		params.rate_val  = maxrate;
  	} else { /* zero serves to revoke the QP rate-limitation */
  		params.rate_unit = 0;
  		params.rate_val  = 0;
  	}
  
  	err = mlx4_update_qp(priv->mdev->dev, tx_ring->qpn, MLX4_UPDATE_QP_RATE_LIMIT,
  			     &params);
  	return err;
  }
  
  static int mlx4_xdp_set(struct net_device *dev, struct bpf_prog *prog)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_en_port_profile new_prof;
  	struct bpf_prog *old_prog;
  	struct mlx4_en_priv *tmp;
  	int tx_changed = 0;
  	int xdp_ring_num;
  	int port_up = 0;
  	int err;
  	int i;
  
  	xdp_ring_num = prog ? priv->rx_ring_num : 0;
  
  	/* No need to reconfigure buffers when simply swapping the
  	 * program for a new one.
  	 */
  	if (priv->tx_ring_num[TX_XDP] == xdp_ring_num) {
  		if (prog) {
  			prog = bpf_prog_add(prog, priv->rx_ring_num - 1);
  			if (IS_ERR(prog))
  				return PTR_ERR(prog);
  		}
  		mutex_lock(&mdev->state_lock);
  		for (i = 0; i < priv->rx_ring_num; i++) {
  			old_prog = rcu_dereference_protected(
  					priv->rx_ring[i]->xdp_prog,
  					lockdep_is_held(&mdev->state_lock));
  			rcu_assign_pointer(priv->rx_ring[i]->xdp_prog, prog);
  			if (old_prog)
  				bpf_prog_put(old_prog);
  		}
  		mutex_unlock(&mdev->state_lock);
  		return 0;
  	}
  
  	if (!mlx4_en_check_xdp_mtu(dev, dev->mtu))
  		return -EOPNOTSUPP;
  
  	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
  	if (!tmp)
  		return -ENOMEM;
  
  	if (prog) {
  		prog = bpf_prog_add(prog, priv->rx_ring_num - 1);
  		if (IS_ERR(prog)) {
  			err = PTR_ERR(prog);
  			goto out;
  		}
  	}
  
  	mutex_lock(&mdev->state_lock);
  	memcpy(&new_prof, priv->prof, sizeof(struct mlx4_en_port_profile));
  	new_prof.tx_ring_num[TX_XDP] = xdp_ring_num;
  
  	if (priv->tx_ring_num[TX] + xdp_ring_num > MAX_TX_RINGS) {
  		tx_changed = 1;
  		new_prof.tx_ring_num[TX] =
  			MAX_TX_RINGS - ALIGN(xdp_ring_num, priv->prof->num_up);
  		en_warn(priv, "Reducing the number of TX rings, to not exceed the max total rings number.\n");
  	}
  
  	err = mlx4_en_try_alloc_resources(priv, tmp, &new_prof, false);
  	if (err) {
  		if (prog)
  			bpf_prog_sub(prog, priv->rx_ring_num - 1);
  		goto unlock_out;
  	}
  
  	if (priv->port_up) {
  		port_up = 1;
  		mlx4_en_stop_port(dev, 1);
  	}
  
  	mlx4_en_safe_replace_resources(priv, tmp);
  	if (tx_changed)
  		netif_set_real_num_tx_queues(dev, priv->tx_ring_num[TX]);
  
  	for (i = 0; i < priv->rx_ring_num; i++) {
  		old_prog = rcu_dereference_protected(
  					priv->rx_ring[i]->xdp_prog,
  					lockdep_is_held(&mdev->state_lock));
  		rcu_assign_pointer(priv->rx_ring[i]->xdp_prog, prog);
  		if (old_prog)
  			bpf_prog_put(old_prog);
  	}
  
  	if (port_up) {
  		err = mlx4_en_start_port(dev);
  		if (err) {
  			en_err(priv, "Failed starting port %d for XDP change\n",
  			       priv->port);
  			queue_work(mdev->workqueue, &priv->watchdog_task);
  		}
  	}
  
  unlock_out:
  	mutex_unlock(&mdev->state_lock);
  out:
  	kfree(tmp);
  	return err;
  }
  
  static u32 mlx4_xdp_query(struct net_device *dev)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	const struct bpf_prog *xdp_prog;
  	u32 prog_id = 0;
  
  	if (!priv->tx_ring_num[TX_XDP])
  		return prog_id;
  
  	mutex_lock(&mdev->state_lock);
  	xdp_prog = rcu_dereference_protected(
  		priv->rx_ring[0]->xdp_prog,
  		lockdep_is_held(&mdev->state_lock));
  	if (xdp_prog)
  		prog_id = xdp_prog->aux->id;
  	mutex_unlock(&mdev->state_lock);
  
  	return prog_id;
  }
  
  static int mlx4_xdp(struct net_device *dev, struct netdev_bpf *xdp)
  {
  	switch (xdp->command) {
  	case XDP_SETUP_PROG:
  		return mlx4_xdp_set(dev, xdp->prog);
  	case XDP_QUERY_PROG:
  		xdp->prog_id = mlx4_xdp_query(dev);
  		return 0;
  	default:
  		return -EINVAL;
  	}
  }
  
  static const struct net_device_ops mlx4_netdev_ops = {
  	.ndo_open		= mlx4_en_open,
  	.ndo_stop		= mlx4_en_close,
  	.ndo_start_xmit		= mlx4_en_xmit,
  	.ndo_select_queue	= mlx4_en_select_queue,
  	.ndo_get_stats64	= mlx4_en_get_stats64,
  	.ndo_set_rx_mode	= mlx4_en_set_rx_mode,
  	.ndo_set_mac_address	= mlx4_en_set_mac,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_change_mtu		= mlx4_en_change_mtu,
  	.ndo_do_ioctl		= mlx4_en_ioctl,
  	.ndo_tx_timeout		= mlx4_en_tx_timeout,
  	.ndo_vlan_rx_add_vid	= mlx4_en_vlan_rx_add_vid,
  	.ndo_vlan_rx_kill_vid	= mlx4_en_vlan_rx_kill_vid,
  	.ndo_set_features	= mlx4_en_set_features,
  	.ndo_fix_features	= mlx4_en_fix_features,
  	.ndo_setup_tc		= __mlx4_en_setup_tc,
  #ifdef CONFIG_RFS_ACCEL
  	.ndo_rx_flow_steer	= mlx4_en_filter_rfs,
  #endif
  	.ndo_get_phys_port_id	= mlx4_en_get_phys_port_id,
  	.ndo_udp_tunnel_add	= mlx4_en_add_vxlan_port,
  	.ndo_udp_tunnel_del	= mlx4_en_del_vxlan_port,
  	.ndo_features_check	= mlx4_en_features_check,
  	.ndo_set_tx_maxrate	= mlx4_en_set_tx_maxrate,
  	.ndo_bpf		= mlx4_xdp,
  };
  
  static const struct net_device_ops mlx4_netdev_ops_master = {
  	.ndo_open		= mlx4_en_open,
  	.ndo_stop		= mlx4_en_close,
  	.ndo_start_xmit		= mlx4_en_xmit,
  	.ndo_select_queue	= mlx4_en_select_queue,
  	.ndo_get_stats64	= mlx4_en_get_stats64,
  	.ndo_set_rx_mode	= mlx4_en_set_rx_mode,
  	.ndo_set_mac_address	= mlx4_en_set_mac,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_change_mtu		= mlx4_en_change_mtu,
  	.ndo_tx_timeout		= mlx4_en_tx_timeout,
  	.ndo_vlan_rx_add_vid	= mlx4_en_vlan_rx_add_vid,
  	.ndo_vlan_rx_kill_vid	= mlx4_en_vlan_rx_kill_vid,
  	.ndo_set_vf_mac		= mlx4_en_set_vf_mac,
  	.ndo_set_vf_vlan	= mlx4_en_set_vf_vlan,
  	.ndo_set_vf_rate	= mlx4_en_set_vf_rate,
  	.ndo_set_vf_spoofchk	= mlx4_en_set_vf_spoofchk,
  	.ndo_set_vf_link_state	= mlx4_en_set_vf_link_state,
  	.ndo_get_vf_stats       = mlx4_en_get_vf_stats,
  	.ndo_get_vf_config	= mlx4_en_get_vf_config,
  	.ndo_set_features	= mlx4_en_set_features,
  	.ndo_fix_features	= mlx4_en_fix_features,
  	.ndo_setup_tc		= __mlx4_en_setup_tc,
  #ifdef CONFIG_RFS_ACCEL
  	.ndo_rx_flow_steer	= mlx4_en_filter_rfs,
  #endif
  	.ndo_get_phys_port_id	= mlx4_en_get_phys_port_id,
  	.ndo_udp_tunnel_add	= mlx4_en_add_vxlan_port,
  	.ndo_udp_tunnel_del	= mlx4_en_del_vxlan_port,
  	.ndo_features_check	= mlx4_en_features_check,
  	.ndo_set_tx_maxrate	= mlx4_en_set_tx_maxrate,
  	.ndo_bpf		= mlx4_xdp,
  };
  
  struct mlx4_en_bond {
  	struct work_struct work;
  	struct mlx4_en_priv *priv;
  	int is_bonded;
  	struct mlx4_port_map port_map;
  };
  
  static void mlx4_en_bond_work(struct work_struct *work)
  {
  	struct mlx4_en_bond *bond = container_of(work,
  						     struct mlx4_en_bond,
  						     work);
  	int err = 0;
  	struct mlx4_dev *dev = bond->priv->mdev->dev;
  
  	if (bond->is_bonded) {
  		if (!mlx4_is_bonded(dev)) {
  			err = mlx4_bond(dev);
  			if (err)
  				en_err(bond->priv, "Fail to bond device\n");
  		}
  		if (!err) {
  			err = mlx4_port_map_set(dev, &bond->port_map);
  			if (err)
  				en_err(bond->priv, "Fail to set port map [%d][%d]: %d\n",
  				       bond->port_map.port1,
  				       bond->port_map.port2,
  				       err);
  		}
  	} else if (mlx4_is_bonded(dev)) {
  		err = mlx4_unbond(dev);
  		if (err)
  			en_err(bond->priv, "Fail to unbond device\n");
  	}
  	dev_put(bond->priv->dev);
  	kfree(bond);
  }
  
  static int mlx4_en_queue_bond_work(struct mlx4_en_priv *priv, int is_bonded,
  				   u8 v2p_p1, u8 v2p_p2)
  {
  	struct mlx4_en_bond *bond = NULL;
  
  	bond = kzalloc(sizeof(*bond), GFP_ATOMIC);
  	if (!bond)
  		return -ENOMEM;
  
  	INIT_WORK(&bond->work, mlx4_en_bond_work);
  	bond->priv = priv;
  	bond->is_bonded = is_bonded;
  	bond->port_map.port1 = v2p_p1;
  	bond->port_map.port2 = v2p_p2;
  	dev_hold(priv->dev);
  	queue_work(priv->mdev->workqueue, &bond->work);
  	return 0;
  }
  
  int mlx4_en_netdev_event(struct notifier_block *this,
  			 unsigned long event, void *ptr)
  {
  	struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
  	u8 port = 0;
  	struct mlx4_en_dev *mdev;
  	struct mlx4_dev *dev;
  	int i, num_eth_ports = 0;
  	bool do_bond = true;
  	struct mlx4_en_priv *priv;
  	u8 v2p_port1 = 0;
  	u8 v2p_port2 = 0;
  
  	if (!net_eq(dev_net(ndev), &init_net))
  		return NOTIFY_DONE;
  
  	mdev = container_of(this, struct mlx4_en_dev, nb);
  	dev = mdev->dev;
  
  	/* Go into this mode only when two network devices set on two ports
  	 * of the same mlx4 device are slaves of the same bonding master
  	 */
  	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
  		++num_eth_ports;
  		if (!port && (mdev->pndev[i] == ndev))
  			port = i;
  		mdev->upper[i] = mdev->pndev[i] ?
  			netdev_master_upper_dev_get(mdev->pndev[i]) : NULL;
  		/* condition not met: network device is a slave */
  		if (!mdev->upper[i])
  			do_bond = false;
  		if (num_eth_ports < 2)
  			continue;
  		/* condition not met: same master */
  		if (mdev->upper[i] != mdev->upper[i-1])
  			do_bond = false;
  	}
  	/* condition not met: 2 salves */
  	do_bond = (num_eth_ports ==  2) ? do_bond : false;
  
  	/* handle only events that come with enough info */
  	if ((do_bond && (event != NETDEV_BONDING_INFO)) || !port)
  		return NOTIFY_DONE;
  
  	priv = netdev_priv(ndev);
  	if (do_bond) {
  		struct netdev_notifier_bonding_info *notifier_info = ptr;
  		struct netdev_bonding_info *bonding_info =
  			&notifier_info->bonding_info;
  
  		/* required mode 1, 2 or 4 */
  		if ((bonding_info->master.bond_mode != BOND_MODE_ACTIVEBACKUP) &&
  		    (bonding_info->master.bond_mode != BOND_MODE_XOR) &&
  		    (bonding_info->master.bond_mode != BOND_MODE_8023AD))
  			do_bond = false;
  
  		/* require exactly 2 slaves */
  		if (bonding_info->master.num_slaves != 2)
  			do_bond = false;
  
  		/* calc v2p */
  		if (do_bond) {
  			if (bonding_info->master.bond_mode ==
  			    BOND_MODE_ACTIVEBACKUP) {
  				/* in active-backup mode virtual ports are
  				 * mapped to the physical port of the active
  				 * slave */
  				if (bonding_info->slave.state ==
  				    BOND_STATE_BACKUP) {
  					if (port == 1) {
  						v2p_port1 = 2;
  						v2p_port2 = 2;
  					} else {
  						v2p_port1 = 1;
  						v2p_port2 = 1;
  					}
  				} else { /* BOND_STATE_ACTIVE */
  					if (port == 1) {
  						v2p_port1 = 1;
  						v2p_port2 = 1;
  					} else {
  						v2p_port1 = 2;
  						v2p_port2 = 2;
  					}
  				}
  			} else { /* Active-Active */
  				/* in active-active mode a virtual port is
  				 * mapped to the native physical port if and only
  				 * if the physical port is up */
  				__s8 link = bonding_info->slave.link;
  
  				if (port == 1)
  					v2p_port2 = 2;
  				else
  					v2p_port1 = 1;
  				if ((link == BOND_LINK_UP) ||
  				    (link == BOND_LINK_FAIL)) {
  					if (port == 1)
  						v2p_port1 = 1;
  					else
  						v2p_port2 = 2;
  				} else { /* BOND_LINK_DOWN || BOND_LINK_BACK */
  					if (port == 1)
  						v2p_port1 = 2;
  					else
  						v2p_port2 = 1;
  				}
  			}
  		}
  	}
  
  	mlx4_en_queue_bond_work(priv, do_bond,
  				v2p_port1, v2p_port2);
  
  	return NOTIFY_DONE;
  }
  
  void mlx4_en_update_pfc_stats_bitmap(struct mlx4_dev *dev,
  				     struct mlx4_en_stats_bitmap *stats_bitmap,
  				     u8 rx_ppp, u8 rx_pause,
  				     u8 tx_ppp, u8 tx_pause)
  {
  	int last_i = NUM_MAIN_STATS + NUM_PORT_STATS + NUM_PF_STATS;
  
  	if (!mlx4_is_slave(dev) &&
  	    (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FLOWSTATS_EN)) {
  		mutex_lock(&stats_bitmap->mutex);
  		bitmap_clear(stats_bitmap->bitmap, last_i, NUM_FLOW_STATS);
  
  		if (rx_ppp)
  			bitmap_set(stats_bitmap->bitmap, last_i,
  				   NUM_FLOW_PRIORITY_STATS_RX);
  		last_i += NUM_FLOW_PRIORITY_STATS_RX;
  
  		if (rx_pause && !(rx_ppp))
  			bitmap_set(stats_bitmap->bitmap, last_i,
  				   NUM_FLOW_STATS_RX);
  		last_i += NUM_FLOW_STATS_RX;
  
  		if (tx_ppp)
  			bitmap_set(stats_bitmap->bitmap, last_i,
  				   NUM_FLOW_PRIORITY_STATS_TX);
  		last_i += NUM_FLOW_PRIORITY_STATS_TX;
  
  		if (tx_pause && !(tx_ppp))
  			bitmap_set(stats_bitmap->bitmap, last_i,
  				   NUM_FLOW_STATS_TX);
  		last_i += NUM_FLOW_STATS_TX;
  
  		mutex_unlock(&stats_bitmap->mutex);
  	}
  }
  
  void mlx4_en_set_stats_bitmap(struct mlx4_dev *dev,
  			      struct mlx4_en_stats_bitmap *stats_bitmap,
  			      u8 rx_ppp, u8 rx_pause,
  			      u8 tx_ppp, u8 tx_pause)
  {
  	int last_i = 0;
  
  	mutex_init(&stats_bitmap->mutex);
  	bitmap_zero(stats_bitmap->bitmap, NUM_ALL_STATS);
  
  	if (mlx4_is_slave(dev)) {
  		bitmap_set(stats_bitmap->bitmap, last_i +
  					 MLX4_FIND_NETDEV_STAT(rx_packets), 1);
  		bitmap_set(stats_bitmap->bitmap, last_i +
  					 MLX4_FIND_NETDEV_STAT(tx_packets), 1);
  		bitmap_set(stats_bitmap->bitmap, last_i +
  					 MLX4_FIND_NETDEV_STAT(rx_bytes), 1);
  		bitmap_set(stats_bitmap->bitmap, last_i +
  					 MLX4_FIND_NETDEV_STAT(tx_bytes), 1);
  		bitmap_set(stats_bitmap->bitmap, last_i +
  					 MLX4_FIND_NETDEV_STAT(rx_dropped), 1);
  		bitmap_set(stats_bitmap->bitmap, last_i +
  					 MLX4_FIND_NETDEV_STAT(tx_dropped), 1);
  	} else {
  		bitmap_set(stats_bitmap->bitmap, last_i, NUM_MAIN_STATS);
  	}
  	last_i += NUM_MAIN_STATS;
  
  	bitmap_set(stats_bitmap->bitmap, last_i, NUM_PORT_STATS);
  	last_i += NUM_PORT_STATS;
  
  	if (mlx4_is_master(dev))
  		bitmap_set(stats_bitmap->bitmap, last_i,
  			   NUM_PF_STATS);
  	last_i += NUM_PF_STATS;
  
  	mlx4_en_update_pfc_stats_bitmap(dev, stats_bitmap,
  					rx_ppp, rx_pause,
  					tx_ppp, tx_pause);
  	last_i += NUM_FLOW_STATS;
  
  	if (!mlx4_is_slave(dev))
  		bitmap_set(stats_bitmap->bitmap, last_i, NUM_PKT_STATS);
  	last_i += NUM_PKT_STATS;
  
  	bitmap_set(stats_bitmap->bitmap, last_i, NUM_XDP_STATS);
  	last_i += NUM_XDP_STATS;
  
  	if (!mlx4_is_slave(dev))
  		bitmap_set(stats_bitmap->bitmap, last_i, NUM_PHY_STATS);
  	last_i += NUM_PHY_STATS;
  }
  
  int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
  			struct mlx4_en_port_profile *prof)
  {
  	struct net_device *dev;
  	struct mlx4_en_priv *priv;
  	int i, t;
  	int err;
  
  	dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
  				 MAX_TX_RINGS, MAX_RX_RINGS);
  	if (dev == NULL)
  		return -ENOMEM;
  
  	netif_set_real_num_tx_queues(dev, prof->tx_ring_num[TX]);
  	netif_set_real_num_rx_queues(dev, prof->rx_ring_num);
  
  	SET_NETDEV_DEV(dev, &mdev->dev->persist->pdev->dev);
  	dev->dev_port = port - 1;
  
  	/*
  	 * Initialize driver private data
  	 */
  
  	priv = netdev_priv(dev);
  	memset(priv, 0, sizeof(struct mlx4_en_priv));
  	priv->counter_index = MLX4_SINK_COUNTER_INDEX(mdev->dev);
  	spin_lock_init(&priv->stats_lock);
  	INIT_WORK(&priv->rx_mode_task, mlx4_en_do_set_rx_mode);
  	INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
  	INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
  	INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
  	INIT_DELAYED_WORK(&priv->service_task, mlx4_en_service_task);
  	INIT_WORK(&priv->vxlan_add_task, mlx4_en_add_vxlan_offloads);
  	INIT_WORK(&priv->vxlan_del_task, mlx4_en_del_vxlan_offloads);
  #ifdef CONFIG_RFS_ACCEL
  	INIT_LIST_HEAD(&priv->filters);
  	spin_lock_init(&priv->filters_lock);
  #endif
  
  	priv->dev = dev;
  	priv->mdev = mdev;
  	priv->ddev = &mdev->pdev->dev;
  	priv->prof = prof;
  	priv->port = port;
  	priv->port_up = false;
  	priv->flags = prof->flags;
  	priv->pflags = MLX4_EN_PRIV_FLAGS_BLUEFLAME;
  	priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
  			MLX4_WQE_CTRL_SOLICITED);
  	priv->num_tx_rings_p_up = mdev->profile.max_num_tx_rings_p_up;
  	priv->tx_work_limit = MLX4_EN_DEFAULT_TX_WORK;
  	netdev_rss_key_fill(priv->rss_key, sizeof(priv->rss_key));
  
  	for (t = 0; t < MLX4_EN_NUM_TX_TYPES; t++) {
  		priv->tx_ring_num[t] = prof->tx_ring_num[t];
  		if (!priv->tx_ring_num[t])
  			continue;
  
  		priv->tx_ring[t] = kcalloc(MAX_TX_RINGS,
  					   sizeof(struct mlx4_en_tx_ring *),
  					   GFP_KERNEL);
  		if (!priv->tx_ring[t]) {
  			err = -ENOMEM;
  			goto out;
  		}
  		priv->tx_cq[t] = kcalloc(MAX_TX_RINGS,
  					 sizeof(struct mlx4_en_cq *),
  					 GFP_KERNEL);
  		if (!priv->tx_cq[t]) {
  			err = -ENOMEM;
  			goto out;
  		}
  	}
  	priv->rx_ring_num = prof->rx_ring_num;
  	priv->cqe_factor = (mdev->dev->caps.cqe_size == 64) ? 1 : 0;
  	priv->cqe_size = mdev->dev->caps.cqe_size;
  	priv->mac_index = -1;
  	priv->msg_enable = MLX4_EN_MSG_LEVEL;
  #ifdef CONFIG_MLX4_EN_DCB
  	if (!mlx4_is_slave(priv->mdev->dev)) {
  		u8 prio;
  
  		for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; ++prio) {
  			priv->ets.prio_tc[prio] = prio;
  			priv->ets.tc_tsa[prio]  = IEEE_8021QAZ_TSA_VENDOR;
  		}
  
  		priv->dcbx_cap = DCB_CAP_DCBX_VER_CEE | DCB_CAP_DCBX_HOST |
  			DCB_CAP_DCBX_VER_IEEE;
  		priv->flags |= MLX4_EN_DCB_ENABLED;
  		priv->cee_config.pfc_state = false;
  
  		for (i = 0; i < MLX4_EN_NUM_UP_HIGH; i++)
  			priv->cee_config.dcb_pfc[i] = pfc_disabled;
  
  		if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ETS_CFG) {
  			dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
  		} else {
  			en_info(priv, "enabling only PFC DCB ops\n");
  			dev->dcbnl_ops = &mlx4_en_dcbnl_pfc_ops;
  		}
  	}
  #endif
  
  	for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i)
  		INIT_HLIST_HEAD(&priv->mac_hash[i]);
  
  	/* Query for default mac and max mtu */
  	priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
  
  	if (mdev->dev->caps.rx_checksum_flags_port[priv->port] &
  	    MLX4_RX_CSUM_MODE_VAL_NON_TCP_UDP)
  		priv->flags |= MLX4_EN_FLAG_RX_CSUM_NON_TCP_UDP;
  
  	/* Set default MAC */
  	dev->addr_len = ETH_ALEN;
  	mlx4_en_u64_to_mac(dev->dev_addr, mdev->dev->caps.def_mac[priv->port]);
  	if (!is_valid_ether_addr(dev->dev_addr)) {
  		en_err(priv, "Port: %d, invalid mac burned: %pM, quiting\n",
  		       priv->port, dev->dev_addr);
  		err = -EINVAL;
  		goto out;
  	} else if (mlx4_is_slave(priv->mdev->dev) &&
  		   (priv->mdev->dev->port_random_macs & 1 << priv->port)) {
  		/* Random MAC was assigned in mlx4_slave_cap
  		 * in mlx4_core module
  		 */
  		dev->addr_assign_type |= NET_ADDR_RANDOM;
  		en_warn(priv, "Assigned random MAC address %pM\n", dev->dev_addr);
  	}
  
  	memcpy(priv->current_mac, dev->dev_addr, sizeof(priv->current_mac));
  
  	priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
  					  DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
  	err = mlx4_en_alloc_resources(priv);
  	if (err)
  		goto out;
  
  	/* Initialize time stamping config */
  	priv->hwtstamp_config.flags = 0;
  	priv->hwtstamp_config.tx_type = HWTSTAMP_TX_OFF;
  	priv->hwtstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
  
  	/* Allocate page for receive rings */
  	err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
  				MLX4_EN_PAGE_SIZE);
  	if (err) {
  		en_err(priv, "Failed to allocate page for rx qps\n");
  		goto out;
  	}
  	priv->allocated = 1;
  
  	/*
  	 * Initialize netdev entry points
  	 */
  	if (mlx4_is_master(priv->mdev->dev))
  		dev->netdev_ops = &mlx4_netdev_ops_master;
  	else
  		dev->netdev_ops = &mlx4_netdev_ops;
  	dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
  	netif_set_real_num_tx_queues(dev, priv->tx_ring_num[TX]);
  	netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
  
  	dev->ethtool_ops = &mlx4_en_ethtool_ops;
  
  	/*
  	 * Set driver features
  	 */
  	dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
  	if (mdev->LSO_support)
  		dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
  
  	dev->vlan_features = dev->hw_features;
  
  	dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
  	dev->features = dev->hw_features | NETIF_F_HIGHDMA |
  			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
  			NETIF_F_HW_VLAN_CTAG_FILTER;
  	dev->hw_features |= NETIF_F_LOOPBACK |
  			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
  
  	if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN)) {
  		dev->features |= NETIF_F_HW_VLAN_STAG_RX |
  			NETIF_F_HW_VLAN_STAG_FILTER;
  		dev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
  	}
  
  	if (mlx4_is_slave(mdev->dev)) {
  		bool vlan_offload_disabled;
  		int phv;
  
  		err = get_phv_bit(mdev->dev, port, &phv);
  		if (!err && phv) {
  			dev->hw_features |= NETIF_F_HW_VLAN_STAG_TX;
  			priv->pflags |= MLX4_EN_PRIV_FLAGS_PHV;
  		}
  		err = mlx4_get_is_vlan_offload_disabled(mdev->dev, port,
  							&vlan_offload_disabled);
  		if (!err && vlan_offload_disabled) {
  			dev->hw_features &= ~(NETIF_F_HW_VLAN_CTAG_TX |
  					      NETIF_F_HW_VLAN_CTAG_RX |
  					      NETIF_F_HW_VLAN_STAG_TX |
  					      NETIF_F_HW_VLAN_STAG_RX);
  			dev->features &= ~(NETIF_F_HW_VLAN_CTAG_TX |
  					   NETIF_F_HW_VLAN_CTAG_RX |
  					   NETIF_F_HW_VLAN_STAG_TX |
  					   NETIF_F_HW_VLAN_STAG_RX);
  		}
  	} else {
  		if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PHV_EN &&
  		    !(mdev->dev->caps.flags2 &
  		      MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN))
  			dev->hw_features |= NETIF_F_HW_VLAN_STAG_TX;
  	}
  
  	if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)
  		dev->hw_features |= NETIF_F_RXFCS;
  
  	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_IGNORE_FCS)
  		dev->hw_features |= NETIF_F_RXALL;
  
  	if (mdev->dev->caps.steering_mode ==
  	    MLX4_STEERING_MODE_DEVICE_MANAGED &&
  	    mdev->dev->caps.dmfs_high_steer_mode != MLX4_STEERING_DMFS_A0_STATIC)
  		dev->hw_features |= NETIF_F_NTUPLE;
  
  	if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
  		dev->priv_flags |= IFF_UNICAST_FLT;
  
  	/* Setting a default hash function value */
  	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_TOP) {
  		priv->rss_hash_fn = ETH_RSS_HASH_TOP;
  	} else if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_XOR) {
  		priv->rss_hash_fn = ETH_RSS_HASH_XOR;
  	} else {
  		en_warn(priv,
  			"No RSS hash capabilities exposed, using Toeplitz\n");
  		priv->rss_hash_fn = ETH_RSS_HASH_TOP;
  	}
  
  	if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
  		dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
  				    NETIF_F_GSO_UDP_TUNNEL_CSUM |
  				    NETIF_F_GSO_PARTIAL;
  		dev->features    |= NETIF_F_GSO_UDP_TUNNEL |
  				    NETIF_F_GSO_UDP_TUNNEL_CSUM |
  				    NETIF_F_GSO_PARTIAL;
  		dev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
  	}
  
  	/* MTU range: 46 - hw-specific max */
  	dev->min_mtu = MLX4_EN_MIN_MTU;
  	dev->max_mtu = priv->max_mtu;
  
  	mdev->pndev[port] = dev;
  	mdev->upper[port] = NULL;
  
  	netif_carrier_off(dev);
  	mlx4_en_set_default_moderation(priv);
  
  	en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num[TX]);
  	en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
  
  	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
  
  	/* Configure port */
  	mlx4_en_calc_rx_buf(dev);
  	err = mlx4_SET_PORT_general(mdev->dev, priv->port,
  				    priv->rx_skb_size + ETH_FCS_LEN,
  				    prof->tx_pause, prof->tx_ppp,
  				    prof->rx_pause, prof->rx_ppp);
  	if (err) {
  		en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
  		       priv->port, err);
  		goto out;
  	}
  
  	if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
  		err = mlx4_SET_PORT_VXLAN(mdev->dev, priv->port, VXLAN_STEER_BY_OUTER_MAC, 1);
  		if (err) {
  			en_err(priv, "Failed setting port L2 tunnel configuration, err %d\n",
  			       err);
  			goto out;
  		}
  	}
  
  	/* Init port */
  	en_warn(priv, "Initializing port\n");
  	err = mlx4_INIT_PORT(mdev->dev, priv->port);
  	if (err) {
  		en_err(priv, "Failed Initializing port\n");
  		goto out;
  	}
  	queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
  
  	/* Initialize time stamp mechanism */
  	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
  		mlx4_en_init_timestamp(mdev);
  
  	queue_delayed_work(mdev->workqueue, &priv->service_task,
  			   SERVICE_TASK_DELAY);
  
  	mlx4_en_set_stats_bitmap(mdev->dev, &priv->stats_bitmap,
  				 mdev->profile.prof[priv->port].rx_ppp,
  				 mdev->profile.prof[priv->port].rx_pause,
  				 mdev->profile.prof[priv->port].tx_ppp,
  				 mdev->profile.prof[priv->port].tx_pause);
  
  	err = register_netdev(dev);
  	if (err) {
  		en_err(priv, "Netdev registration failed for port %d\n", port);
  		goto out;
  	}
  
  	priv->registered = 1;
  	devlink_port_type_eth_set(mlx4_get_devlink_port(mdev->dev, priv->port),
  				  dev);
  
  	return 0;
  
  out:
  	mlx4_en_destroy_netdev(dev);
  	return err;
  }
  
  int mlx4_en_reset_config(struct net_device *dev,
  			 struct hwtstamp_config ts_config,
  			 netdev_features_t features)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
  	struct mlx4_en_dev *mdev = priv->mdev;
  	struct mlx4_en_port_profile new_prof;
  	struct mlx4_en_priv *tmp;
  	int port_up = 0;
  	int err = 0;
  
  	if (priv->hwtstamp_config.tx_type == ts_config.tx_type &&
  	    priv->hwtstamp_config.rx_filter == ts_config.rx_filter &&
  	    !DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX) &&
  	    !DEV_FEATURE_CHANGED(dev, features, NETIF_F_RXFCS))
  		return 0; /* Nothing to change */
  
  	if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX) &&
  	    (features & NETIF_F_HW_VLAN_CTAG_RX) &&
  	    (priv->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE)) {
  		en_warn(priv, "Can't turn ON rx vlan offload while time-stamping rx filter is ON\n");
  		return -EINVAL;
  	}
  
  	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
  	if (!tmp)
  		return -ENOMEM;
  
  	mutex_lock(&mdev->state_lock);
  
  	memcpy(&new_prof, priv->prof, sizeof(struct mlx4_en_port_profile));
  	memcpy(&new_prof.hwtstamp_config, &ts_config, sizeof(ts_config));
  
  	err = mlx4_en_try_alloc_resources(priv, tmp, &new_prof, true);
  	if (err)
  		goto out;
  
  	if (priv->port_up) {
  		port_up = 1;
  		mlx4_en_stop_port(dev, 1);
  	}
  
  	mlx4_en_safe_replace_resources(priv, tmp);
  
  	if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX)) {
  		if (features & NETIF_F_HW_VLAN_CTAG_RX)
  			dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
  		else
  			dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
  	} else if (ts_config.rx_filter == HWTSTAMP_FILTER_NONE) {
  		/* RX time-stamping is OFF, update the RX vlan offload
  		 * to the latest wanted state
  		 */
  		if (dev->wanted_features & NETIF_F_HW_VLAN_CTAG_RX)
  			dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
  		else
  			dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
  	}
  
  	if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_RXFCS)) {
  		if (features & NETIF_F_RXFCS)
  			dev->features |= NETIF_F_RXFCS;
  		else
  			dev->features &= ~NETIF_F_RXFCS;
  	}
  
  	/* RX vlan offload and RX time-stamping can't co-exist !
  	 * Regardless of the caller's choice,
  	 * Turn Off RX vlan offload in case of time-stamping is ON
  	 */
  	if (ts_config.rx_filter != HWTSTAMP_FILTER_NONE) {
  		if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
  			en_warn(priv, "Turning off RX vlan offload since RX time-stamping is ON\n");
  		dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
  	}
  
  	if (port_up) {
  		err = mlx4_en_start_port(dev);
  		if (err)
  			en_err(priv, "Failed starting port\n");
  	}
  
  out:
  	mutex_unlock(&mdev->state_lock);
  	kfree(tmp);
  	if (!err)
  		netdev_features_change(dev);
  	return err;
  }
  