xref: /openbmc/linux/drivers/net/ethernet/intel/ice/ice_eswitch_br.c (revision 29d7aa18)

// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2023, Intel Corporation. */

#include "ice.h"
#include "ice_eswitch_br.h"
#include "ice_repr.h"
#include "ice_switch.h"
#include "ice_vlan.h"
#include "ice_vf_vsi_vlan_ops.h"
#include "ice_trace.h"

#define ICE_ESW_BRIDGE_UPDATE_INTERVAL msecs_to_jiffies(1000)

static const struct rhashtable_params ice_fdb_ht_params = {
	.key_offset = offsetof(struct ice_esw_br_fdb_entry, data),
	.key_len = sizeof(struct ice_esw_br_fdb_data),
	.head_offset = offsetof(struct ice_esw_br_fdb_entry, ht_node),
	.automatic_shrinking = true,
};

static bool ice_eswitch_br_is_dev_valid(const struct net_device *dev)
{
	/* Accept only PF netdev, PRs and LAG */
	return ice_is_port_repr_netdev(dev) || netif_is_ice(dev) ||
		netif_is_lag_master(dev);
}

static struct net_device *
ice_eswitch_br_get_uplink_from_lag(struct net_device *lag_dev)
{
	struct net_device *lower;
	struct list_head *iter;

	netdev_for_each_lower_dev(lag_dev, lower, iter) {
		if (netif_is_ice(lower))
			return lower;
	}

	return NULL;
}

static struct ice_esw_br_port *
ice_eswitch_br_netdev_to_port(struct net_device *dev)
{
	if (ice_is_port_repr_netdev(dev)) {
		struct ice_repr *repr = ice_netdev_to_repr(dev);

		return repr->br_port;
	} else if (netif_is_ice(dev) || netif_is_lag_master(dev)) {
		struct net_device *ice_dev;
		struct ice_pf *pf;

		if (netif_is_lag_master(dev))
			ice_dev = ice_eswitch_br_get_uplink_from_lag(dev);
		else
			ice_dev = dev;

		if (!ice_dev)
			return NULL;

		pf = ice_netdev_to_pf(ice_dev);

		return pf->br_port;
	}

	return NULL;
}

static void
ice_eswitch_br_ingress_rule_setup(struct ice_adv_rule_info *rule_info,
				  u8 pf_id, u16 vf_vsi_idx)
{
	rule_info->sw_act.vsi_handle = vf_vsi_idx;
	rule_info->sw_act.flag |= ICE_FLTR_RX;
	rule_info->sw_act.src = pf_id;
	rule_info->priority = 5;
}

static void
ice_eswitch_br_egress_rule_setup(struct ice_adv_rule_info *rule_info,
				 u16 pf_vsi_idx)
{
	rule_info->sw_act.vsi_handle = pf_vsi_idx;
	rule_info->sw_act.flag |= ICE_FLTR_TX;
	rule_info->flags_info.act = ICE_SINGLE_ACT_LAN_ENABLE;
	rule_info->flags_info.act_valid = true;
	rule_info->priority = 5;
}

static int
ice_eswitch_br_rule_delete(struct ice_hw *hw, struct ice_rule_query_data *rule)
{
	int err;

	if (!rule)
		return -EINVAL;

	err = ice_rem_adv_rule_by_id(hw, rule);
	kfree(rule);

	return err;
}

static u16
ice_eswitch_br_get_lkups_cnt(u16 vid)
{
	return ice_eswitch_br_is_vid_valid(vid) ? 2 : 1;
}

static void
ice_eswitch_br_add_vlan_lkup(struct ice_adv_lkup_elem *list, u16 vid)
{
	if (ice_eswitch_br_is_vid_valid(vid)) {
		list[1].type = ICE_VLAN_OFOS;
		list[1].h_u.vlan_hdr.vlan = cpu_to_be16(vid & VLAN_VID_MASK);
		list[1].m_u.vlan_hdr.vlan = cpu_to_be16(0xFFFF);
	}
}

static struct ice_rule_query_data *
ice_eswitch_br_fwd_rule_create(struct ice_hw *hw, int vsi_idx, int port_type,
			       const unsigned char *mac, u16 vid)
{
	struct ice_adv_rule_info rule_info = { 0 };
	struct ice_rule_query_data *rule;
	struct ice_adv_lkup_elem *list;
	u16 lkups_cnt;
	int err;

	lkups_cnt = ice_eswitch_br_get_lkups_cnt(vid);

	rule = kzalloc(sizeof(*rule), GFP_KERNEL);
	if (!rule)
		return ERR_PTR(-ENOMEM);

	list = kcalloc(lkups_cnt, sizeof(*list), GFP_ATOMIC);
	if (!list) {
		err = -ENOMEM;
		goto err_list_alloc;
	}

	switch (port_type) {
	case ICE_ESWITCH_BR_UPLINK_PORT:
		ice_eswitch_br_egress_rule_setup(&rule_info, vsi_idx);
		break;
	case ICE_ESWITCH_BR_VF_REPR_PORT:
		ice_eswitch_br_ingress_rule_setup(&rule_info, hw->pf_id,
						  vsi_idx);
		break;
	default:
		err = -EINVAL;
		goto err_add_rule;
	}

	list[0].type = ICE_MAC_OFOS;
	ether_addr_copy(list[0].h_u.eth_hdr.dst_addr, mac);
	eth_broadcast_addr(list[0].m_u.eth_hdr.dst_addr);

	ice_eswitch_br_add_vlan_lkup(list, vid);

	rule_info.need_pass_l2 = true;

	rule_info.sw_act.fltr_act = ICE_FWD_TO_VSI;

	err = ice_add_adv_rule(hw, list, lkups_cnt, &rule_info, rule);
	if (err)
		goto err_add_rule;

	kfree(list);

	return rule;

err_add_rule:
	kfree(list);
err_list_alloc:
	kfree(rule);

	return ERR_PTR(err);
}

static struct ice_rule_query_data *
ice_eswitch_br_guard_rule_create(struct ice_hw *hw, u16 vsi_idx,
				 const unsigned char *mac, u16 vid)
{
	struct ice_adv_rule_info rule_info = { 0 };
	struct ice_rule_query_data *rule;
	struct ice_adv_lkup_elem *list;
	int err = -ENOMEM;
	u16 lkups_cnt;

	lkups_cnt = ice_eswitch_br_get_lkups_cnt(vid);

	rule = kzalloc(sizeof(*rule), GFP_KERNEL);
	if (!rule)
		goto err_exit;

	list = kcalloc(lkups_cnt, sizeof(*list), GFP_ATOMIC);
	if (!list)
		goto err_list_alloc;

	list[0].type = ICE_MAC_OFOS;
	ether_addr_copy(list[0].h_u.eth_hdr.src_addr, mac);
	eth_broadcast_addr(list[0].m_u.eth_hdr.src_addr);

	ice_eswitch_br_add_vlan_lkup(list, vid);

	rule_info.allow_pass_l2 = true;
	rule_info.sw_act.vsi_handle = vsi_idx;
	rule_info.sw_act.fltr_act = ICE_NOP;
	rule_info.priority = 5;

	err = ice_add_adv_rule(hw, list, lkups_cnt, &rule_info, rule);
	if (err)
		goto err_add_rule;

	kfree(list);

	return rule;

err_add_rule:
	kfree(list);
err_list_alloc:
	kfree(rule);
err_exit:
	return ERR_PTR(err);
}

static struct ice_esw_br_flow *
ice_eswitch_br_flow_create(struct device *dev, struct ice_hw *hw, int vsi_idx,
			   int port_type, const unsigned char *mac, u16 vid)
{
	struct ice_rule_query_data *fwd_rule, *guard_rule;
	struct ice_esw_br_flow *flow;
	int err;

	flow = kzalloc(sizeof(*flow), GFP_KERNEL);
	if (!flow)
		return ERR_PTR(-ENOMEM);

	fwd_rule = ice_eswitch_br_fwd_rule_create(hw, vsi_idx, port_type, mac,
						  vid);
	err = PTR_ERR_OR_ZERO(fwd_rule);
	if (err) {
		dev_err(dev, "Failed to create eswitch bridge %sgress forward rule, err: %d\n",
			port_type == ICE_ESWITCH_BR_UPLINK_PORT ? "e" : "in",
			err);
		goto err_fwd_rule;
	}

	guard_rule = ice_eswitch_br_guard_rule_create(hw, vsi_idx, mac, vid);
	err = PTR_ERR_OR_ZERO(guard_rule);
	if (err) {
		dev_err(dev, "Failed to create eswitch bridge %sgress guard rule, err: %d\n",
			port_type == ICE_ESWITCH_BR_UPLINK_PORT ? "e" : "in",
			err);
		goto err_guard_rule;
	}

	flow->fwd_rule = fwd_rule;
	flow->guard_rule = guard_rule;

	return flow;

err_guard_rule:
	ice_eswitch_br_rule_delete(hw, fwd_rule);
err_fwd_rule:
	kfree(flow);

	return ERR_PTR(err);
}

static struct ice_esw_br_fdb_entry *
ice_eswitch_br_fdb_find(struct ice_esw_br *bridge, const unsigned char *mac,
			u16 vid)
{
	struct ice_esw_br_fdb_data data = {
		.vid = vid,
	};

	ether_addr_copy(data.addr, mac);
	return rhashtable_lookup_fast(&bridge->fdb_ht, &data,
				      ice_fdb_ht_params);
}

static void
ice_eswitch_br_flow_delete(struct ice_pf *pf, struct ice_esw_br_flow *flow)
{
	struct device *dev = ice_pf_to_dev(pf);
	int err;

	err = ice_eswitch_br_rule_delete(&pf->hw, flow->fwd_rule);
	if (err)
		dev_err(dev, "Failed to delete FDB forward rule, err: %d\n",
			err);

	err = ice_eswitch_br_rule_delete(&pf->hw, flow->guard_rule);
	if (err)
		dev_err(dev, "Failed to delete FDB guard rule, err: %d\n",
			err);

	kfree(flow);
}

static struct ice_esw_br_vlan *
ice_esw_br_port_vlan_lookup(struct ice_esw_br *bridge, u16 vsi_idx, u16 vid)
{
	struct ice_pf *pf = bridge->br_offloads->pf;
	struct device *dev = ice_pf_to_dev(pf);
	struct ice_esw_br_port *port;
	struct ice_esw_br_vlan *vlan;

	port = xa_load(&bridge->ports, vsi_idx);
	if (!port) {
		dev_info(dev, "Bridge port lookup failed (vsi=%u)\n", vsi_idx);
		return ERR_PTR(-EINVAL);
	}

	vlan = xa_load(&port->vlans, vid);
	if (!vlan) {
		dev_info(dev, "Bridge port vlan metadata lookup failed (vsi=%u)\n",
			 vsi_idx);
		return ERR_PTR(-EINVAL);
	}

	return vlan;
}

static void
ice_eswitch_br_fdb_entry_delete(struct ice_esw_br *bridge,
				struct ice_esw_br_fdb_entry *fdb_entry)
{
	struct ice_pf *pf = bridge->br_offloads->pf;

	rhashtable_remove_fast(&bridge->fdb_ht, &fdb_entry->ht_node,
			       ice_fdb_ht_params);
	list_del(&fdb_entry->list);

	ice_eswitch_br_flow_delete(pf, fdb_entry->flow);

	kfree(fdb_entry);
}

static void
ice_eswitch_br_fdb_offload_notify(struct net_device *dev,
				  const unsigned char *mac, u16 vid,
				  unsigned long val)
{
	struct switchdev_notifier_fdb_info fdb_info = {
		.addr = mac,
		.vid = vid,
		.offloaded = true,
	};

	call_switchdev_notifiers(val, dev, &fdb_info.info, NULL);
}

static void
ice_eswitch_br_fdb_entry_notify_and_cleanup(struct ice_esw_br *bridge,
					    struct ice_esw_br_fdb_entry *entry)
{
	if (!(entry->flags & ICE_ESWITCH_BR_FDB_ADDED_BY_USER))
		ice_eswitch_br_fdb_offload_notify(entry->dev, entry->data.addr,
						  entry->data.vid,
						  SWITCHDEV_FDB_DEL_TO_BRIDGE);
	ice_eswitch_br_fdb_entry_delete(bridge, entry);
}

static void
ice_eswitch_br_fdb_entry_find_and_delete(struct ice_esw_br *bridge,
					 const unsigned char *mac, u16 vid)
{
	struct ice_pf *pf = bridge->br_offloads->pf;
	struct ice_esw_br_fdb_entry *fdb_entry;
	struct device *dev = ice_pf_to_dev(pf);

	fdb_entry = ice_eswitch_br_fdb_find(bridge, mac, vid);
	if (!fdb_entry) {
		dev_err(dev, "FDB entry with mac: %pM and vid: %u not found\n",
			mac, vid);
		return;
	}

	trace_ice_eswitch_br_fdb_entry_find_and_delete(fdb_entry);
	ice_eswitch_br_fdb_entry_notify_and_cleanup(bridge, fdb_entry);
}

static void
ice_eswitch_br_fdb_entry_create(struct net_device *netdev,
				struct ice_esw_br_port *br_port,
				bool added_by_user,
				const unsigned char *mac, u16 vid)
{
	struct ice_esw_br *bridge = br_port->bridge;
	struct ice_pf *pf = bridge->br_offloads->pf;
	struct device *dev = ice_pf_to_dev(pf);
	struct ice_esw_br_fdb_entry *fdb_entry;
	struct ice_esw_br_flow *flow;
	struct ice_esw_br_vlan *vlan;
	struct ice_hw *hw = &pf->hw;
	unsigned long event;
	int err;

	/* untagged filtering is not yet supported */
	if (!(bridge->flags & ICE_ESWITCH_BR_VLAN_FILTERING) && vid)
		return;

	if ((bridge->flags & ICE_ESWITCH_BR_VLAN_FILTERING)) {
		vlan = ice_esw_br_port_vlan_lookup(bridge, br_port->vsi_idx,
						   vid);
		if (IS_ERR(vlan)) {
			dev_err(dev, "Failed to find vlan lookup, err: %ld\n",
				PTR_ERR(vlan));
			return;
		}
	}

	fdb_entry = ice_eswitch_br_fdb_find(bridge, mac, vid);
	if (fdb_entry)
		ice_eswitch_br_fdb_entry_notify_and_cleanup(bridge, fdb_entry);

	fdb_entry = kzalloc(sizeof(*fdb_entry), GFP_KERNEL);
	if (!fdb_entry) {
		err = -ENOMEM;
		goto err_exit;
	}

	flow = ice_eswitch_br_flow_create(dev, hw, br_port->vsi_idx,
					  br_port->type, mac, vid);
	if (IS_ERR(flow)) {
		err = PTR_ERR(flow);
		goto err_add_flow;
	}

	ether_addr_copy(fdb_entry->data.addr, mac);
	fdb_entry->data.vid = vid;
	fdb_entry->br_port = br_port;
	fdb_entry->flow = flow;
	fdb_entry->dev = netdev;
	fdb_entry->last_use = jiffies;
	event = SWITCHDEV_FDB_ADD_TO_BRIDGE;

	if (added_by_user) {
		fdb_entry->flags |= ICE_ESWITCH_BR_FDB_ADDED_BY_USER;
		event = SWITCHDEV_FDB_OFFLOADED;
	}

	err = rhashtable_insert_fast(&bridge->fdb_ht, &fdb_entry->ht_node,
				     ice_fdb_ht_params);
	if (err)
		goto err_fdb_insert;

	list_add(&fdb_entry->list, &bridge->fdb_list);
	trace_ice_eswitch_br_fdb_entry_create(fdb_entry);

	ice_eswitch_br_fdb_offload_notify(netdev, mac, vid, event);

	return;

err_fdb_insert:
	ice_eswitch_br_flow_delete(pf, flow);
err_add_flow:
	kfree(fdb_entry);
err_exit:
	dev_err(dev, "Failed to create fdb entry, err: %d\n", err);
}

static void
ice_eswitch_br_fdb_work_dealloc(struct ice_esw_br_fdb_work *fdb_work)
{
	kfree(fdb_work->fdb_info.addr);
	kfree(fdb_work);
}

static void
ice_eswitch_br_fdb_event_work(struct work_struct *work)
{
	struct ice_esw_br_fdb_work *fdb_work = ice_work_to_fdb_work(work);
	bool added_by_user = fdb_work->fdb_info.added_by_user;
	const unsigned char *mac = fdb_work->fdb_info.addr;
	u16 vid = fdb_work->fdb_info.vid;
	struct ice_esw_br_port *br_port;

	rtnl_lock();

	br_port = ice_eswitch_br_netdev_to_port(fdb_work->dev);
	if (!br_port)
		goto err_exit;

	switch (fdb_work->event) {
	case SWITCHDEV_FDB_ADD_TO_DEVICE:
		ice_eswitch_br_fdb_entry_create(fdb_work->dev, br_port,
						added_by_user, mac, vid);
		break;
	case SWITCHDEV_FDB_DEL_TO_DEVICE:
		ice_eswitch_br_fdb_entry_find_and_delete(br_port->bridge,
							 mac, vid);
		break;
	default:
		goto err_exit;
	}

err_exit:
	rtnl_unlock();
	dev_put(fdb_work->dev);
	ice_eswitch_br_fdb_work_dealloc(fdb_work);
}

static struct ice_esw_br_fdb_work *
ice_eswitch_br_fdb_work_alloc(struct switchdev_notifier_fdb_info *fdb_info,
			      struct net_device *dev,
			      unsigned long event)
{
	struct ice_esw_br_fdb_work *work;
	unsigned char *mac;

	work = kzalloc(sizeof(*work), GFP_ATOMIC);
	if (!work)
		return ERR_PTR(-ENOMEM);

	INIT_WORK(&work->work, ice_eswitch_br_fdb_event_work);
	memcpy(&work->fdb_info, fdb_info, sizeof(work->fdb_info));

	mac = kzalloc(ETH_ALEN, GFP_ATOMIC);
	if (!mac) {
		kfree(work);
		return ERR_PTR(-ENOMEM);
	}

	ether_addr_copy(mac, fdb_info->addr);
	work->fdb_info.addr = mac;
	work->event = event;
	work->dev = dev;

	return work;
}

static int
ice_eswitch_br_switchdev_event(struct notifier_block *nb,
			       unsigned long event, void *ptr)
{
	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	struct switchdev_notifier_fdb_info *fdb_info;
	struct switchdev_notifier_info *info = ptr;
	struct ice_esw_br_offloads *br_offloads;
	struct ice_esw_br_fdb_work *work;
	struct netlink_ext_ack *extack;
	struct net_device *upper;

	br_offloads = ice_nb_to_br_offloads(nb, switchdev_nb);
	extack = switchdev_notifier_info_to_extack(ptr);

	upper = netdev_master_upper_dev_get_rcu(dev);
	if (!upper)
		return NOTIFY_DONE;

	if (!netif_is_bridge_master(upper))
		return NOTIFY_DONE;

	if (!ice_eswitch_br_is_dev_valid(dev))
		return NOTIFY_DONE;

	if (!ice_eswitch_br_netdev_to_port(dev))
		return NOTIFY_DONE;

	switch (event) {
	case SWITCHDEV_FDB_ADD_TO_DEVICE:
	case SWITCHDEV_FDB_DEL_TO_DEVICE:
		fdb_info = container_of(info, typeof(*fdb_info), info);

		work = ice_eswitch_br_fdb_work_alloc(fdb_info, dev, event);
		if (IS_ERR(work)) {
			NL_SET_ERR_MSG_MOD(extack, "Failed to init switchdev fdb work");
			return notifier_from_errno(PTR_ERR(work));
		}
		dev_hold(dev);

		queue_work(br_offloads->wq, &work->work);
		break;
	default:
		break;
	}
	return NOTIFY_DONE;
}

void ice_eswitch_br_fdb_flush(struct ice_esw_br *bridge)
{
	struct ice_esw_br_fdb_entry *entry, *tmp;

	if (!bridge)
		return;

	list_for_each_entry_safe(entry, tmp, &bridge->fdb_list, list)
		ice_eswitch_br_fdb_entry_notify_and_cleanup(bridge, entry);
}

static void
ice_eswitch_br_vlan_filtering_set(struct ice_esw_br *bridge, bool enable)
{
	if (enable == !!(bridge->flags & ICE_ESWITCH_BR_VLAN_FILTERING))
		return;

	ice_eswitch_br_fdb_flush(bridge);
	if (enable)
		bridge->flags |= ICE_ESWITCH_BR_VLAN_FILTERING;
	else
		bridge->flags &= ~ICE_ESWITCH_BR_VLAN_FILTERING;
}

static void
ice_eswitch_br_clear_pvid(struct ice_esw_br_port *port)
{
	struct ice_vlan port_vlan = ICE_VLAN(ETH_P_8021Q, port->pvid, 0);
	struct ice_vsi_vlan_ops *vlan_ops;

	vlan_ops = ice_get_compat_vsi_vlan_ops(port->vsi);

	vlan_ops->del_vlan(port->vsi, &port_vlan);
	vlan_ops->clear_port_vlan(port->vsi);

	ice_vf_vsi_disable_port_vlan(port->vsi);

	port->pvid = 0;
}

static void
ice_eswitch_br_vlan_cleanup(struct ice_esw_br_port *port,
			    struct ice_esw_br_vlan *vlan)
{
	struct ice_esw_br_fdb_entry *fdb_entry, *tmp;
	struct ice_esw_br *bridge = port->bridge;

	trace_ice_eswitch_br_vlan_cleanup(vlan);

	list_for_each_entry_safe(fdb_entry, tmp, &bridge->fdb_list, list) {
		if (vlan->vid == fdb_entry->data.vid)
			ice_eswitch_br_fdb_entry_delete(bridge, fdb_entry);
	}

	xa_erase(&port->vlans, vlan->vid);
	if (port->pvid == vlan->vid)
		ice_eswitch_br_clear_pvid(port);
	kfree(vlan);
}

static void ice_eswitch_br_port_vlans_flush(struct ice_esw_br_port *port)
{
	struct ice_esw_br_vlan *vlan;
	unsigned long index;

	xa_for_each(&port->vlans, index, vlan)
		ice_eswitch_br_vlan_cleanup(port, vlan);
}

static int
ice_eswitch_br_set_pvid(struct ice_esw_br_port *port,
			struct ice_esw_br_vlan *vlan)
{
	struct ice_vlan port_vlan = ICE_VLAN(ETH_P_8021Q, vlan->vid, 0);
	struct device *dev = ice_pf_to_dev(port->vsi->back);
	struct ice_vsi_vlan_ops *vlan_ops;
	int err;

	if (port->pvid == vlan->vid || vlan->vid == 1)
		return 0;

	/* Setting port vlan on uplink isn't supported by hw */
	if (port->type == ICE_ESWITCH_BR_UPLINK_PORT)
		return -EOPNOTSUPP;

	if (port->pvid) {
		dev_info(dev,
			 "Port VLAN (vsi=%u, vid=%u) already exists on the port, remove it before adding new one\n",
			 port->vsi_idx, port->pvid);
		return -EEXIST;
	}

	ice_vf_vsi_enable_port_vlan(port->vsi);

	vlan_ops = ice_get_compat_vsi_vlan_ops(port->vsi);
	err = vlan_ops->set_port_vlan(port->vsi, &port_vlan);
	if (err)
		return err;

	err = vlan_ops->add_vlan(port->vsi, &port_vlan);
	if (err)
		return err;

	ice_eswitch_br_port_vlans_flush(port);
	port->pvid = vlan->vid;

	return 0;
}

static struct ice_esw_br_vlan *
ice_eswitch_br_vlan_create(u16 vid, u16 flags, struct ice_esw_br_port *port)
{
	struct device *dev = ice_pf_to_dev(port->vsi->back);
	struct ice_esw_br_vlan *vlan;
	int err;

	vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
	if (!vlan)
		return ERR_PTR(-ENOMEM);

	vlan->vid = vid;
	vlan->flags = flags;
	if ((flags & BRIDGE_VLAN_INFO_PVID) &&
	    (flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
		err = ice_eswitch_br_set_pvid(port, vlan);
		if (err)
			goto err_set_pvid;
	} else if ((flags & BRIDGE_VLAN_INFO_PVID) ||
		   (flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
		dev_info(dev, "VLAN push and pop are supported only simultaneously\n");
		err = -EOPNOTSUPP;
		goto err_set_pvid;
	}

	err = xa_insert(&port->vlans, vlan->vid, vlan, GFP_KERNEL);
	if (err)
		goto err_insert;

	trace_ice_eswitch_br_vlan_create(vlan);

	return vlan;

err_insert:
	if (port->pvid)
		ice_eswitch_br_clear_pvid(port);
err_set_pvid:
	kfree(vlan);
	return ERR_PTR(err);
}

static int
ice_eswitch_br_port_vlan_add(struct ice_esw_br *bridge, u16 vsi_idx, u16 vid,
			     u16 flags, struct netlink_ext_ack *extack)
{
	struct ice_esw_br_port *port;
	struct ice_esw_br_vlan *vlan;

	port = xa_load(&bridge->ports, vsi_idx);
	if (!port)
		return -EINVAL;

	if (port->pvid) {
		dev_info(ice_pf_to_dev(port->vsi->back),
			 "Port VLAN (vsi=%u, vid=%d) exists on the port, remove it to add trunk VLANs\n",
			 port->vsi_idx, port->pvid);
		return -EEXIST;
	}

	vlan = xa_load(&port->vlans, vid);
	if (vlan) {
		if (vlan->flags == flags)
			return 0;

		ice_eswitch_br_vlan_cleanup(port, vlan);
	}

	vlan = ice_eswitch_br_vlan_create(vid, flags, port);
	if (IS_ERR(vlan)) {
		NL_SET_ERR_MSG_FMT_MOD(extack, "Failed to create VLAN entry, vid: %u, vsi: %u",
				       vid, vsi_idx);
		return PTR_ERR(vlan);
	}

	return 0;
}

static void
ice_eswitch_br_port_vlan_del(struct ice_esw_br *bridge, u16 vsi_idx, u16 vid)
{
	struct ice_esw_br_port *port;
	struct ice_esw_br_vlan *vlan;

	port = xa_load(&bridge->ports, vsi_idx);
	if (!port)
		return;

	vlan = xa_load(&port->vlans, vid);
	if (!vlan)
		return;

	ice_eswitch_br_vlan_cleanup(port, vlan);
}

static int
ice_eswitch_br_port_obj_add(struct net_device *netdev, const void *ctx,
			    const struct switchdev_obj *obj,
			    struct netlink_ext_ack *extack)
{
	struct ice_esw_br_port *br_port = ice_eswitch_br_netdev_to_port(netdev);
	struct switchdev_obj_port_vlan *vlan;
	int err;

	if (!br_port)
		return -EINVAL;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
		err = ice_eswitch_br_port_vlan_add(br_port->bridge,
						   br_port->vsi_idx, vlan->vid,
						   vlan->flags, extack);
		return err;
	default:
		return -EOPNOTSUPP;
	}
}

static int
ice_eswitch_br_port_obj_del(struct net_device *netdev, const void *ctx,
			    const struct switchdev_obj *obj)
{
	struct ice_esw_br_port *br_port = ice_eswitch_br_netdev_to_port(netdev);
	struct switchdev_obj_port_vlan *vlan;

	if (!br_port)
		return -EINVAL;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
		ice_eswitch_br_port_vlan_del(br_port->bridge, br_port->vsi_idx,
					     vlan->vid);
		return 0;
	default:
		return -EOPNOTSUPP;
	}
}

static int
ice_eswitch_br_port_obj_attr_set(struct net_device *netdev, const void *ctx,
				 const struct switchdev_attr *attr,
				 struct netlink_ext_ack *extack)
{
	struct ice_esw_br_port *br_port = ice_eswitch_br_netdev_to_port(netdev);

	if (!br_port)
		return -EINVAL;

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
		ice_eswitch_br_vlan_filtering_set(br_port->bridge,
						  attr->u.vlan_filtering);
		return 0;
	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
		br_port->bridge->ageing_time =
			clock_t_to_jiffies(attr->u.ageing_time);
		return 0;
	default:
		return -EOPNOTSUPP;
	}
}

static int
ice_eswitch_br_event_blocking(struct notifier_block *nb, unsigned long event,
			      void *ptr)
{
	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	int err;

	switch (event) {
	case SWITCHDEV_PORT_OBJ_ADD:
		err = switchdev_handle_port_obj_add(dev, ptr,
						    ice_eswitch_br_is_dev_valid,
						    ice_eswitch_br_port_obj_add);
		break;
	case SWITCHDEV_PORT_OBJ_DEL:
		err = switchdev_handle_port_obj_del(dev, ptr,
						    ice_eswitch_br_is_dev_valid,
						    ice_eswitch_br_port_obj_del);
		break;
	case SWITCHDEV_PORT_ATTR_SET:
		err = switchdev_handle_port_attr_set(dev, ptr,
						     ice_eswitch_br_is_dev_valid,
						     ice_eswitch_br_port_obj_attr_set);
		break;
	default:
		err = 0;
	}

	return notifier_from_errno(err);
}

static void
ice_eswitch_br_port_deinit(struct ice_esw_br *bridge,
			   struct ice_esw_br_port *br_port)
{
	struct ice_esw_br_fdb_entry *fdb_entry, *tmp;
	struct ice_vsi *vsi = br_port->vsi;

	list_for_each_entry_safe(fdb_entry, tmp, &bridge->fdb_list, list) {
		if (br_port == fdb_entry->br_port)
			ice_eswitch_br_fdb_entry_delete(bridge, fdb_entry);
	}

	if (br_port->type == ICE_ESWITCH_BR_UPLINK_PORT && vsi->back)
		vsi->back->br_port = NULL;
	else if (vsi->vf && vsi->vf->repr)
		vsi->vf->repr->br_port = NULL;

	xa_erase(&bridge->ports, br_port->vsi_idx);
	ice_eswitch_br_port_vlans_flush(br_port);
	kfree(br_port);
}

static struct ice_esw_br_port *
ice_eswitch_br_port_init(struct ice_esw_br *bridge)
{
	struct ice_esw_br_port *br_port;

	br_port = kzalloc(sizeof(*br_port), GFP_KERNEL);
	if (!br_port)
		return ERR_PTR(-ENOMEM);

	xa_init(&br_port->vlans);

	br_port->bridge = bridge;

	return br_port;
}

static int
ice_eswitch_br_vf_repr_port_init(struct ice_esw_br *bridge,
				 struct ice_repr *repr)
{
	struct ice_esw_br_port *br_port;
	int err;

	br_port = ice_eswitch_br_port_init(bridge);
	if (IS_ERR(br_port))
		return PTR_ERR(br_port);

	br_port->vsi = repr->src_vsi;
	br_port->vsi_idx = br_port->vsi->idx;
	br_port->type = ICE_ESWITCH_BR_VF_REPR_PORT;
	repr->br_port = br_port;

	err = xa_insert(&bridge->ports, br_port->vsi_idx, br_port, GFP_KERNEL);
	if (err) {
		ice_eswitch_br_port_deinit(bridge, br_port);
		return err;
	}

	return 0;
}

static int
ice_eswitch_br_uplink_port_init(struct ice_esw_br *bridge, struct ice_pf *pf)
{
	struct ice_vsi *vsi = pf->eswitch.uplink_vsi;
	struct ice_esw_br_port *br_port;
	int err;

	br_port = ice_eswitch_br_port_init(bridge);
	if (IS_ERR(br_port))
		return PTR_ERR(br_port);

	br_port->vsi = vsi;
	br_port->vsi_idx = br_port->vsi->idx;
	br_port->type = ICE_ESWITCH_BR_UPLINK_PORT;
	pf->br_port = br_port;

	err = xa_insert(&bridge->ports, br_port->vsi_idx, br_port, GFP_KERNEL);
	if (err) {
		ice_eswitch_br_port_deinit(bridge, br_port);
		return err;
	}

	return 0;
}

static void
ice_eswitch_br_ports_flush(struct ice_esw_br *bridge)
{
	struct ice_esw_br_port *port;
	unsigned long i;

	xa_for_each(&bridge->ports, i, port)
		ice_eswitch_br_port_deinit(bridge, port);
}

static void
ice_eswitch_br_deinit(struct ice_esw_br_offloads *br_offloads,
		      struct ice_esw_br *bridge)
{
	if (!bridge)
		return;

	/* Cleanup all the ports that were added asynchronously
	 * through NETDEV_CHANGEUPPER event.
	 */
	ice_eswitch_br_ports_flush(bridge);
	WARN_ON(!xa_empty(&bridge->ports));
	xa_destroy(&bridge->ports);
	rhashtable_destroy(&bridge->fdb_ht);

	br_offloads->bridge = NULL;
	kfree(bridge);
}

static struct ice_esw_br *
ice_eswitch_br_init(struct ice_esw_br_offloads *br_offloads, int ifindex)
{
	struct ice_esw_br *bridge;
	int err;

	bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
	if (!bridge)
		return ERR_PTR(-ENOMEM);

	err = rhashtable_init(&bridge->fdb_ht, &ice_fdb_ht_params);
	if (err) {
		kfree(bridge);
		return ERR_PTR(err);
	}

	INIT_LIST_HEAD(&bridge->fdb_list);
	bridge->br_offloads = br_offloads;
	bridge->ifindex = ifindex;
	bridge->ageing_time = clock_t_to_jiffies(BR_DEFAULT_AGEING_TIME);
	xa_init(&bridge->ports);
	br_offloads->bridge = bridge;

	return bridge;
}

static struct ice_esw_br *
ice_eswitch_br_get(struct ice_esw_br_offloads *br_offloads, int ifindex,
		   struct netlink_ext_ack *extack)
{
	struct ice_esw_br *bridge = br_offloads->bridge;

	if (bridge) {
		if (bridge->ifindex != ifindex) {
			NL_SET_ERR_MSG_MOD(extack,
					   "Only one bridge is supported per eswitch");
			return ERR_PTR(-EOPNOTSUPP);
		}
		return bridge;
	}

	/* Create the bridge if it doesn't exist yet */
	bridge = ice_eswitch_br_init(br_offloads, ifindex);
	if (IS_ERR(bridge))
		NL_SET_ERR_MSG_MOD(extack, "Failed to init the bridge");

	return bridge;
}

static void
ice_eswitch_br_verify_deinit(struct ice_esw_br_offloads *br_offloads,
			     struct ice_esw_br *bridge)
{
	/* Remove the bridge if it exists and there are no ports left */
	if (!bridge || !xa_empty(&bridge->ports))
		return;

	ice_eswitch_br_deinit(br_offloads, bridge);
}

static int
ice_eswitch_br_port_unlink(struct ice_esw_br_offloads *br_offloads,
			   struct net_device *dev, int ifindex,
			   struct netlink_ext_ack *extack)
{
	struct ice_esw_br_port *br_port = ice_eswitch_br_netdev_to_port(dev);
	struct ice_esw_br *bridge;

	if (!br_port) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Port representor is not attached to any bridge");
		return -EINVAL;
	}

	if (br_port->bridge->ifindex != ifindex) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Port representor is attached to another bridge");
		return -EINVAL;
	}

	bridge = br_port->bridge;

	trace_ice_eswitch_br_port_unlink(br_port);
	ice_eswitch_br_port_deinit(br_port->bridge, br_port);
	ice_eswitch_br_verify_deinit(br_offloads, bridge);

	return 0;
}

static int
ice_eswitch_br_port_link(struct ice_esw_br_offloads *br_offloads,
			 struct net_device *dev, int ifindex,
			 struct netlink_ext_ack *extack)
{
	struct ice_esw_br *bridge;
	int err;

	if (ice_eswitch_br_netdev_to_port(dev)) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Port is already attached to the bridge");
		return -EINVAL;
	}

	bridge = ice_eswitch_br_get(br_offloads, ifindex, extack);
	if (IS_ERR(bridge))
		return PTR_ERR(bridge);

	if (ice_is_port_repr_netdev(dev)) {
		struct ice_repr *repr = ice_netdev_to_repr(dev);

		err = ice_eswitch_br_vf_repr_port_init(bridge, repr);
		trace_ice_eswitch_br_port_link(repr->br_port);
	} else {
		struct net_device *ice_dev;
		struct ice_pf *pf;

		if (netif_is_lag_master(dev))
			ice_dev = ice_eswitch_br_get_uplink_from_lag(dev);
		else
			ice_dev = dev;

		if (!ice_dev)
			return 0;

		pf = ice_netdev_to_pf(ice_dev);

		err = ice_eswitch_br_uplink_port_init(bridge, pf);
		trace_ice_eswitch_br_port_link(pf->br_port);
	}
	if (err) {
		NL_SET_ERR_MSG_MOD(extack, "Failed to init bridge port");
		goto err_port_init;
	}

	return 0;

err_port_init:
	ice_eswitch_br_verify_deinit(br_offloads, bridge);
	return err;
}

static int
ice_eswitch_br_port_changeupper(struct notifier_block *nb, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct netdev_notifier_changeupper_info *info = ptr;
	struct ice_esw_br_offloads *br_offloads;
	struct netlink_ext_ack *extack;
	struct net_device *upper;

	br_offloads = ice_nb_to_br_offloads(nb, netdev_nb);

	if (!ice_eswitch_br_is_dev_valid(dev))
		return 0;

	upper = info->upper_dev;
	if (!netif_is_bridge_master(upper))
		return 0;

	extack = netdev_notifier_info_to_extack(&info->info);

	if (info->linking)
		return ice_eswitch_br_port_link(br_offloads, dev,
						upper->ifindex, extack);
	else
		return ice_eswitch_br_port_unlink(br_offloads, dev,
						  upper->ifindex, extack);
}

static int
ice_eswitch_br_port_event(struct notifier_block *nb,
			  unsigned long event, void *ptr)
{
	int err = 0;

	switch (event) {
	case NETDEV_CHANGEUPPER:
		err = ice_eswitch_br_port_changeupper(nb, ptr);
		break;
	}

	return notifier_from_errno(err);
}

static void
ice_eswitch_br_offloads_dealloc(struct ice_pf *pf)
{
	struct ice_esw_br_offloads *br_offloads = pf->eswitch.br_offloads;

	ASSERT_RTNL();

	if (!br_offloads)
		return;

	ice_eswitch_br_deinit(br_offloads, br_offloads->bridge);

	pf->eswitch.br_offloads = NULL;
	kfree(br_offloads);
}

static struct ice_esw_br_offloads *
ice_eswitch_br_offloads_alloc(struct ice_pf *pf)
{
	struct ice_esw_br_offloads *br_offloads;

	ASSERT_RTNL();

	if (pf->eswitch.br_offloads)
		return ERR_PTR(-EEXIST);

	br_offloads = kzalloc(sizeof(*br_offloads), GFP_KERNEL);
	if (!br_offloads)
		return ERR_PTR(-ENOMEM);

	pf->eswitch.br_offloads = br_offloads;
	br_offloads->pf = pf;

	return br_offloads;
}

void
ice_eswitch_br_offloads_deinit(struct ice_pf *pf)
{
	struct ice_esw_br_offloads *br_offloads;

	br_offloads = pf->eswitch.br_offloads;
	if (!br_offloads)
		return;

	cancel_delayed_work_sync(&br_offloads->update_work);
	unregister_netdevice_notifier(&br_offloads->netdev_nb);
	unregister_switchdev_blocking_notifier(&br_offloads->switchdev_blk);
	unregister_switchdev_notifier(&br_offloads->switchdev_nb);
	destroy_workqueue(br_offloads->wq);
	/* Although notifier block is unregistered just before,
	 * so we don't get any new events, some events might be
	 * already in progress. Hold the rtnl lock and wait for
	 * them to finished.
	 */
	rtnl_lock();
	ice_eswitch_br_offloads_dealloc(pf);
	rtnl_unlock();
}

static void ice_eswitch_br_update(struct ice_esw_br_offloads *br_offloads)
{
	struct ice_esw_br *bridge = br_offloads->bridge;
	struct ice_esw_br_fdb_entry *entry, *tmp;

	if (!bridge)
		return;

	rtnl_lock();
	list_for_each_entry_safe(entry, tmp, &bridge->fdb_list, list) {
		if (entry->flags & ICE_ESWITCH_BR_FDB_ADDED_BY_USER)
			continue;

		if (time_is_after_eq_jiffies(entry->last_use +
					     bridge->ageing_time))
			continue;

		ice_eswitch_br_fdb_entry_notify_and_cleanup(bridge, entry);
	}
	rtnl_unlock();
}

static void ice_eswitch_br_update_work(struct work_struct *work)
{
	struct ice_esw_br_offloads *br_offloads;

	br_offloads = ice_work_to_br_offloads(work);

	ice_eswitch_br_update(br_offloads);

	queue_delayed_work(br_offloads->wq, &br_offloads->update_work,
			   ICE_ESW_BRIDGE_UPDATE_INTERVAL);
}

int
ice_eswitch_br_offloads_init(struct ice_pf *pf)
{
	struct ice_esw_br_offloads *br_offloads;
	struct device *dev = ice_pf_to_dev(pf);
	int err;

	rtnl_lock();
	br_offloads = ice_eswitch_br_offloads_alloc(pf);
	rtnl_unlock();
	if (IS_ERR(br_offloads)) {
		dev_err(dev, "Failed to init eswitch bridge\n");
		return PTR_ERR(br_offloads);
	}

	br_offloads->wq = alloc_ordered_workqueue("ice_bridge_wq", 0);
	if (!br_offloads->wq) {
		err = -ENOMEM;
		dev_err(dev, "Failed to allocate bridge workqueue\n");
		goto err_alloc_wq;
	}

	br_offloads->switchdev_nb.notifier_call =
		ice_eswitch_br_switchdev_event;
	err = register_switchdev_notifier(&br_offloads->switchdev_nb);
	if (err) {
		dev_err(dev,
			"Failed to register switchdev notifier\n");
		goto err_reg_switchdev_nb;
	}

	br_offloads->switchdev_blk.notifier_call =
		ice_eswitch_br_event_blocking;
	err = register_switchdev_blocking_notifier(&br_offloads->switchdev_blk);
	if (err) {
		dev_err(dev,
			"Failed to register bridge blocking switchdev notifier\n");
		goto err_reg_switchdev_blk;
	}

	br_offloads->netdev_nb.notifier_call = ice_eswitch_br_port_event;
	err = register_netdevice_notifier(&br_offloads->netdev_nb);
	if (err) {
		dev_err(dev,
			"Failed to register bridge port event notifier\n");
		goto err_reg_netdev_nb;
	}

	INIT_DELAYED_WORK(&br_offloads->update_work,
			  ice_eswitch_br_update_work);
	queue_delayed_work(br_offloads->wq, &br_offloads->update_work,
			   ICE_ESW_BRIDGE_UPDATE_INTERVAL);

	return 0;

err_reg_netdev_nb:
	unregister_switchdev_blocking_notifier(&br_offloads->switchdev_blk);
err_reg_switchdev_blk:
	unregister_switchdev_notifier(&br_offloads->switchdev_nb);
err_reg_switchdev_nb:
	destroy_workqueue(br_offloads->wq);
err_alloc_wq:
	rtnl_lock();
	ice_eswitch_br_offloads_dealloc(pf);
	rtnl_unlock();

	return err;
}