xref: /openbmc/linux/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c (revision f6dfb4c3)

/*
 * Copyright (c) 2016, 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 <net/flow_dissector.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_skbedit.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/device.h>
#include <linux/rhashtable.h>
#include <net/switchdev.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>
#include <net/tc_act/tc_pedit.h>
#include <net/vxlan.h>
#include <net/arp.h>
#include "en.h"
#include "en_rep.h"
#include "en_tc.h"
#include "eswitch.h"
#include "vxlan.h"

struct mlx5_nic_flow_attr {
	u32 action;
	u32 flow_tag;
	u32 mod_hdr_id;
};

enum {
	MLX5E_TC_FLOW_ESWITCH	= BIT(0),
	MLX5E_TC_FLOW_NIC	= BIT(1),
	MLX5E_TC_FLOW_OFFLOADED	= BIT(2),
};

struct mlx5e_tc_flow {
	struct rhash_head	node;
	u64			cookie;
	u8			flags;
	struct mlx5_flow_handle *rule;
	struct list_head	encap; /* flows sharing the same encap */
	union {
		struct mlx5_esw_flow_attr esw_attr[0];
		struct mlx5_nic_flow_attr nic_attr[0];
	};
};

struct mlx5e_tc_flow_parse_attr {
	struct mlx5_flow_spec spec;
	int num_mod_hdr_actions;
	void *mod_hdr_actions;
};

enum {
	MLX5_HEADER_TYPE_VXLAN = 0x0,
	MLX5_HEADER_TYPE_NVGRE = 0x1,
};

#define MLX5E_TC_TABLE_NUM_ENTRIES 1024
#define MLX5E_TC_TABLE_NUM_GROUPS 4

static struct mlx5_flow_handle *
mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
		      struct mlx5e_tc_flow_parse_attr *parse_attr,
		      struct mlx5e_tc_flow *flow)
{
	struct mlx5_nic_flow_attr *attr = flow->nic_attr;
	struct mlx5_core_dev *dev = priv->mdev;
	struct mlx5_flow_destination dest = {};
	struct mlx5_flow_act flow_act = {
		.action = attr->action,
		.flow_tag = attr->flow_tag,
		.encap_id = 0,
	};
	struct mlx5_fc *counter = NULL;
	struct mlx5_flow_handle *rule;
	bool table_created = false;
	int err;

	if (attr->action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
		dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
		dest.ft = priv->fs.vlan.ft.t;
	} else if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
		counter = mlx5_fc_create(dev, true);
		if (IS_ERR(counter))
			return ERR_CAST(counter);

		dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
		dest.counter = counter;
	}

	if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
		err = mlx5_modify_header_alloc(dev, MLX5_FLOW_NAMESPACE_KERNEL,
					       parse_attr->num_mod_hdr_actions,
					       parse_attr->mod_hdr_actions,
					       &attr->mod_hdr_id);
		flow_act.modify_id = attr->mod_hdr_id;
		kfree(parse_attr->mod_hdr_actions);
		if (err) {
			rule = ERR_PTR(err);
			goto err_create_mod_hdr_id;
		}
	}

	if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
		priv->fs.tc.t =
			mlx5_create_auto_grouped_flow_table(priv->fs.ns,
							    MLX5E_TC_PRIO,
							    MLX5E_TC_TABLE_NUM_ENTRIES,
							    MLX5E_TC_TABLE_NUM_GROUPS,
							    0, 0);
		if (IS_ERR(priv->fs.tc.t)) {
			netdev_err(priv->netdev,
				   "Failed to create tc offload table\n");
			rule = ERR_CAST(priv->fs.tc.t);
			goto err_create_ft;
		}

		table_created = true;
	}

	parse_attr->spec.match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
	rule = mlx5_add_flow_rules(priv->fs.tc.t, &parse_attr->spec,
				   &flow_act, &dest, 1);

	if (IS_ERR(rule))
		goto err_add_rule;

	return rule;

err_add_rule:
	if (table_created) {
		mlx5_destroy_flow_table(priv->fs.tc.t);
		priv->fs.tc.t = NULL;
	}
err_create_ft:
	if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
		mlx5_modify_header_dealloc(priv->mdev,
					   attr->mod_hdr_id);
err_create_mod_hdr_id:
	mlx5_fc_destroy(dev, counter);

	return rule;
}

static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
				  struct mlx5e_tc_flow *flow)
{
	struct mlx5_fc *counter = NULL;

	counter = mlx5_flow_rule_counter(flow->rule);
	mlx5_del_flow_rules(flow->rule);
	mlx5_fc_destroy(priv->mdev, counter);

	if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
		mlx5_destroy_flow_table(priv->fs.tc.t);
		priv->fs.tc.t = NULL;
	}

	if (flow->nic_attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
		mlx5_modify_header_dealloc(priv->mdev,
					   flow->nic_attr->mod_hdr_id);
}

static void mlx5e_detach_encap(struct mlx5e_priv *priv,
			       struct mlx5e_tc_flow *flow);

static struct mlx5_flow_handle *
mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
		      struct mlx5e_tc_flow_parse_attr *parse_attr,
		      struct mlx5e_tc_flow *flow)
{
	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
	struct mlx5_esw_flow_attr *attr = flow->esw_attr;
	struct mlx5_flow_handle *rule;
	int err;

	err = mlx5_eswitch_add_vlan_action(esw, attr);
	if (err) {
		rule = ERR_PTR(err);
		goto err_add_vlan;
	}

	if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
		err = mlx5_modify_header_alloc(priv->mdev, MLX5_FLOW_NAMESPACE_FDB,
					       parse_attr->num_mod_hdr_actions,
					       parse_attr->mod_hdr_actions,
					       &attr->mod_hdr_id);
		kfree(parse_attr->mod_hdr_actions);
		if (err) {
			rule = ERR_PTR(err);
			goto err_mod_hdr;
		}
	}

	rule = mlx5_eswitch_add_offloaded_rule(esw, &parse_attr->spec, attr);
	if (IS_ERR(rule))
		goto err_add_rule;

	return rule;

err_add_rule:
	if (flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
		mlx5_modify_header_dealloc(priv->mdev,
					   attr->mod_hdr_id);
err_mod_hdr:
	mlx5_eswitch_del_vlan_action(esw, attr);
err_add_vlan:
	if (attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP)
		mlx5e_detach_encap(priv, flow);
	return rule;
}

static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
				  struct mlx5e_tc_flow *flow)
{
	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
	struct mlx5_esw_flow_attr *attr = flow->esw_attr;

	if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
		flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
		mlx5_eswitch_del_offloaded_rule(esw, flow->rule, flow->esw_attr);
	}

	mlx5_eswitch_del_vlan_action(esw, flow->esw_attr);

	if (flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP) {
		mlx5e_detach_encap(priv, flow);
		kvfree(flow->esw_attr->parse_attr);
	}

	if (flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
		mlx5_modify_header_dealloc(priv->mdev,
					   attr->mod_hdr_id);
}

void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
			      struct mlx5e_encap_entry *e)
{
	struct mlx5e_tc_flow *flow;
	int err;

	err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
			       e->encap_size, e->encap_header,
			       &e->encap_id);
	if (err) {
		mlx5_core_warn(priv->mdev, "Failed to offload cached encapsulation header, %d\n",
			       err);
		return;
	}
	e->flags |= MLX5_ENCAP_ENTRY_VALID;
	mlx5e_rep_queue_neigh_stats_work(priv);

	list_for_each_entry(flow, &e->flows, encap) {
		flow->esw_attr->encap_id = e->encap_id;
		flow->rule = mlx5e_tc_add_fdb_flow(priv,
						   flow->esw_attr->parse_attr,
						   flow);
		if (IS_ERR(flow->rule)) {
			err = PTR_ERR(flow->rule);
			mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n",
				       err);
			continue;
		}
		flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
	}
}

void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
			      struct mlx5e_encap_entry *e)
{
	struct mlx5e_tc_flow *flow;
	struct mlx5_fc *counter;

	list_for_each_entry(flow, &e->flows, encap) {
		if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
			flow->flags &= ~MLX5E_TC_FLOW_OFFLOADED;
			counter = mlx5_flow_rule_counter(flow->rule);
			mlx5_del_flow_rules(flow->rule);
			mlx5_fc_destroy(priv->mdev, counter);
		}
	}

	if (e->flags & MLX5_ENCAP_ENTRY_VALID) {
		e->flags &= ~MLX5_ENCAP_ENTRY_VALID;
		mlx5_encap_dealloc(priv->mdev, e->encap_id);
	}
}

void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
{
	struct mlx5e_neigh *m_neigh = &nhe->m_neigh;
	u64 bytes, packets, lastuse = 0;
	struct mlx5e_tc_flow *flow;
	struct mlx5e_encap_entry *e;
	struct mlx5_fc *counter;
	struct neigh_table *tbl;
	bool neigh_used = false;
	struct neighbour *n;

	if (m_neigh->family == AF_INET)
		tbl = &arp_tbl;
#if IS_ENABLED(CONFIG_IPV6)
	else if (m_neigh->family == AF_INET6)
		tbl = ipv6_stub->nd_tbl;
#endif
	else
		return;

	list_for_each_entry(e, &nhe->encap_list, encap_list) {
		if (!(e->flags & MLX5_ENCAP_ENTRY_VALID))
			continue;
		list_for_each_entry(flow, &e->flows, encap) {
			if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
				counter = mlx5_flow_rule_counter(flow->rule);
				mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
				if (time_after((unsigned long)lastuse, nhe->reported_lastuse)) {
					neigh_used = true;
					break;
				}
			}
		}
	}

	if (neigh_used) {
		nhe->reported_lastuse = jiffies;

		/* find the relevant neigh according to the cached device and
		 * dst ip pair
		 */
		n = neigh_lookup(tbl, &m_neigh->dst_ip, m_neigh->dev);
		if (!n) {
			WARN(1, "The neighbour already freed\n");
			return;
		}

		neigh_event_send(n, NULL);
		neigh_release(n);
	}
}

static void mlx5e_detach_encap(struct mlx5e_priv *priv,
			       struct mlx5e_tc_flow *flow)
{
	struct list_head *next = flow->encap.next;

	list_del(&flow->encap);
	if (list_empty(next)) {
		struct mlx5e_encap_entry *e;

		e = list_entry(next, struct mlx5e_encap_entry, flows);
		mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);

		if (e->flags & MLX5_ENCAP_ENTRY_VALID)
			mlx5_encap_dealloc(priv->mdev, e->encap_id);

		hlist_del_rcu(&e->encap_hlist);
		kfree(e->encap_header);
		kfree(e);
	}
}

static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
			      struct mlx5e_tc_flow *flow)
{
	if (flow->flags & MLX5E_TC_FLOW_ESWITCH)
		mlx5e_tc_del_fdb_flow(priv, flow);
	else
		mlx5e_tc_del_nic_flow(priv, flow);
}

static void parse_vxlan_attr(struct mlx5_flow_spec *spec,
			     struct tc_cls_flower_offload *f)
{
	void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
				       outer_headers);
	void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
				       outer_headers);
	void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
				    misc_parameters);
	void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
				    misc_parameters);

	MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
	MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
		struct flow_dissector_key_keyid *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_KEYID,
						  f->key);
		struct flow_dissector_key_keyid *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_KEYID,
						  f->mask);
		MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
			 be32_to_cpu(mask->keyid));
		MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
			 be32_to_cpu(key->keyid));
	}
}

static int parse_tunnel_attr(struct mlx5e_priv *priv,
			     struct mlx5_flow_spec *spec,
			     struct tc_cls_flower_offload *f)
{
	void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
				       outer_headers);
	void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
				       outer_headers);

	struct flow_dissector_key_control *enc_control =
		skb_flow_dissector_target(f->dissector,
					  FLOW_DISSECTOR_KEY_ENC_CONTROL,
					  f->key);

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
		struct flow_dissector_key_ports *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_PORTS,
						  f->key);
		struct flow_dissector_key_ports *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_PORTS,
						  f->mask);
		struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
		struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
		struct mlx5e_priv *up_priv = netdev_priv(up_dev);

		/* Full udp dst port must be given */
		if (memchr_inv(&mask->dst, 0xff, sizeof(mask->dst)))
			goto vxlan_match_offload_err;

		if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->dst)) &&
		    MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
			parse_vxlan_attr(spec, f);
		else {
			netdev_warn(priv->netdev,
				    "%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->dst));
			return -EOPNOTSUPP;
		}

		MLX5_SET(fte_match_set_lyr_2_4, headers_c,
			 udp_dport, ntohs(mask->dst));
		MLX5_SET(fte_match_set_lyr_2_4, headers_v,
			 udp_dport, ntohs(key->dst));

		MLX5_SET(fte_match_set_lyr_2_4, headers_c,
			 udp_sport, ntohs(mask->src));
		MLX5_SET(fte_match_set_lyr_2_4, headers_v,
			 udp_sport, ntohs(key->src));
	} else { /* udp dst port must be given */
vxlan_match_offload_err:
		netdev_warn(priv->netdev,
			    "IP tunnel decap offload supported only for vxlan, must set UDP dport\n");
		return -EOPNOTSUPP;
	}

	if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
		struct flow_dissector_key_ipv4_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
						  f->key);
		struct flow_dissector_key_ipv4_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
						  f->mask);
		MLX5_SET(fte_match_set_lyr_2_4, headers_c,
			 src_ipv4_src_ipv6.ipv4_layout.ipv4,
			 ntohl(mask->src));
		MLX5_SET(fte_match_set_lyr_2_4, headers_v,
			 src_ipv4_src_ipv6.ipv4_layout.ipv4,
			 ntohl(key->src));

		MLX5_SET(fte_match_set_lyr_2_4, headers_c,
			 dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
			 ntohl(mask->dst));
		MLX5_SET(fte_match_set_lyr_2_4, headers_v,
			 dst_ipv4_dst_ipv6.ipv4_layout.ipv4,
			 ntohl(key->dst));

		MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ethertype);
		MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, ETH_P_IP);
	} else if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
		struct flow_dissector_key_ipv6_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
						  f->key);
		struct flow_dissector_key_ipv6_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
						  f->mask);

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       &mask->src, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       &key->src, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       &mask->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       &key->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));

		MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ethertype);
		MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, ETH_P_IPV6);
	}

	/* Enforce DMAC when offloading incoming tunneled flows.
	 * Flow counters require a match on the DMAC.
	 */
	MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_47_16);
	MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, dmac_15_0);
	ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				     dmac_47_16), priv->netdev->dev_addr);

	/* let software handle IP fragments */
	MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
	MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag, 0);

	return 0;
}

static int __parse_cls_flower(struct mlx5e_priv *priv,
			      struct mlx5_flow_spec *spec,
			      struct tc_cls_flower_offload *f,
			      u8 *min_inline)
{
	void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
				       outer_headers);
	void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
				       outer_headers);
	u16 addr_type = 0;
	u8 ip_proto = 0;

	*min_inline = MLX5_INLINE_MODE_L2;

	if (f->dissector->used_keys &
	    ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
	      BIT(FLOW_DISSECTOR_KEY_BASIC) |
	      BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_VLAN) |
	      BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_PORTS) |
	      BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
	      BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_ENC_PORTS)	|
	      BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL))) {
		netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
			    f->dissector->used_keys);
		return -EOPNOTSUPP;
	}

	if ((dissector_uses_key(f->dissector,
				FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) ||
	     dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID) ||
	     dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) &&
	    dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
		struct flow_dissector_key_control *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ENC_CONTROL,
						  f->key);
		switch (key->addr_type) {
		case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
		case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
			if (parse_tunnel_attr(priv, spec, f))
				return -EOPNOTSUPP;
			break;
		default:
			return -EOPNOTSUPP;
		}

		/* In decap flow, header pointers should point to the inner
		 * headers, outer header were already set by parse_tunnel_attr
		 */
		headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
					 inner_headers);
		headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
					 inner_headers);
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
		struct flow_dissector_key_control *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_CONTROL,
						  f->key);

		struct flow_dissector_key_control *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_CONTROL,
						  f->mask);
		addr_type = key->addr_type;

		if (mask->flags & FLOW_DIS_IS_FRAGMENT) {
			MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
			MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag,
				 key->flags & FLOW_DIS_IS_FRAGMENT);

			/* the HW doesn't need L3 inline to match on frag=no */
			if (key->flags & FLOW_DIS_IS_FRAGMENT)
				*min_inline = MLX5_INLINE_MODE_IP;
		}
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
		struct flow_dissector_key_basic *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_BASIC,
						  f->key);
		struct flow_dissector_key_basic *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_BASIC,
						  f->mask);
		ip_proto = key->ip_proto;

		MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
			 ntohs(mask->n_proto));
		MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
			 ntohs(key->n_proto));

		MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
			 mask->ip_proto);
		MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
			 key->ip_proto);

		if (mask->ip_proto)
			*min_inline = MLX5_INLINE_MODE_IP;
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
		struct flow_dissector_key_eth_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ETH_ADDRS,
						  f->key);
		struct flow_dissector_key_eth_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_ETH_ADDRS,
						  f->mask);

		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
					     dmac_47_16),
				mask->dst);
		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
					     dmac_47_16),
				key->dst);

		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
					     smac_47_16),
				mask->src);
		ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
					     smac_47_16),
				key->src);
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
		struct flow_dissector_key_vlan *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_VLAN,
						  f->key);
		struct flow_dissector_key_vlan *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_VLAN,
						  f->mask);
		if (mask->vlan_id || mask->vlan_priority) {
			MLX5_SET(fte_match_set_lyr_2_4, headers_c, cvlan_tag, 1);
			MLX5_SET(fte_match_set_lyr_2_4, headers_v, cvlan_tag, 1);

			MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_vid, mask->vlan_id);
			MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_vid, key->vlan_id);

			MLX5_SET(fte_match_set_lyr_2_4, headers_c, first_prio, mask->vlan_priority);
			MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_prio, key->vlan_priority);
		}
	}

	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
		struct flow_dissector_key_ipv4_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV4_ADDRS,
						  f->key);
		struct flow_dissector_key_ipv4_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV4_ADDRS,
						  f->mask);

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    src_ipv4_src_ipv6.ipv4_layout.ipv4),
		       &mask->src, sizeof(mask->src));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    src_ipv4_src_ipv6.ipv4_layout.ipv4),
		       &key->src, sizeof(key->src));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
		       &mask->dst, sizeof(mask->dst));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
		       &key->dst, sizeof(key->dst));

		if (mask->src || mask->dst)
			*min_inline = MLX5_INLINE_MODE_IP;
	}

	if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
		struct flow_dissector_key_ipv6_addrs *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV6_ADDRS,
						  f->key);
		struct flow_dissector_key_ipv6_addrs *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_IPV6_ADDRS,
						  f->mask);

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       &mask->src, sizeof(mask->src));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       &key->src, sizeof(key->src));

		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       &mask->dst, sizeof(mask->dst));
		memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       &key->dst, sizeof(key->dst));

		if (ipv6_addr_type(&mask->src) != IPV6_ADDR_ANY ||
		    ipv6_addr_type(&mask->dst) != IPV6_ADDR_ANY)
			*min_inline = MLX5_INLINE_MODE_IP;
	}

	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
		struct flow_dissector_key_ports *key =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_PORTS,
						  f->key);
		struct flow_dissector_key_ports *mask =
			skb_flow_dissector_target(f->dissector,
						  FLOW_DISSECTOR_KEY_PORTS,
						  f->mask);
		switch (ip_proto) {
		case IPPROTO_TCP:
			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 tcp_sport, ntohs(mask->src));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 tcp_sport, ntohs(key->src));

			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 tcp_dport, ntohs(mask->dst));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 tcp_dport, ntohs(key->dst));
			break;

		case IPPROTO_UDP:
			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 udp_sport, ntohs(mask->src));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 udp_sport, ntohs(key->src));

			MLX5_SET(fte_match_set_lyr_2_4, headers_c,
				 udp_dport, ntohs(mask->dst));
			MLX5_SET(fte_match_set_lyr_2_4, headers_v,
				 udp_dport, ntohs(key->dst));
			break;
		default:
			netdev_err(priv->netdev,
				   "Only UDP and TCP transport are supported\n");
			return -EINVAL;
		}

		if (mask->src || mask->dst)
			*min_inline = MLX5_INLINE_MODE_TCP_UDP;
	}

	return 0;
}

static int parse_cls_flower(struct mlx5e_priv *priv,
			    struct mlx5e_tc_flow *flow,
			    struct mlx5_flow_spec *spec,
			    struct tc_cls_flower_offload *f)
{
	struct mlx5_core_dev *dev = priv->mdev;
	struct mlx5_eswitch *esw = dev->priv.eswitch;
	struct mlx5e_rep_priv *rpriv = priv->ppriv;
	struct mlx5_eswitch_rep *rep;
	u8 min_inline;
	int err;

	err = __parse_cls_flower(priv, spec, f, &min_inline);

	if (!err && (flow->flags & MLX5E_TC_FLOW_ESWITCH)) {
		rep = rpriv->rep;
		if (rep->vport != FDB_UPLINK_VPORT &&
		    (esw->offloads.inline_mode != MLX5_INLINE_MODE_NONE &&
		    esw->offloads.inline_mode < min_inline)) {
			netdev_warn(priv->netdev,
				    "Flow is not offloaded due to min inline setting, required %d actual %d\n",
				    min_inline, esw->offloads.inline_mode);
			return -EOPNOTSUPP;
		}
	}

	return err;
}

struct pedit_headers {
	struct ethhdr  eth;
	struct iphdr   ip4;
	struct ipv6hdr ip6;
	struct tcphdr  tcp;
	struct udphdr  udp;
};

static int pedit_header_offsets[] = {
	[TCA_PEDIT_KEY_EX_HDR_TYPE_ETH] = offsetof(struct pedit_headers, eth),
	[TCA_PEDIT_KEY_EX_HDR_TYPE_IP4] = offsetof(struct pedit_headers, ip4),
	[TCA_PEDIT_KEY_EX_HDR_TYPE_IP6] = offsetof(struct pedit_headers, ip6),
	[TCA_PEDIT_KEY_EX_HDR_TYPE_TCP] = offsetof(struct pedit_headers, tcp),
	[TCA_PEDIT_KEY_EX_HDR_TYPE_UDP] = offsetof(struct pedit_headers, udp),
};

#define pedit_header(_ph, _htype) ((void *)(_ph) + pedit_header_offsets[_htype])

static int set_pedit_val(u8 hdr_type, u32 mask, u32 val, u32 offset,
			 struct pedit_headers *masks,
			 struct pedit_headers *vals)
{
	u32 *curr_pmask, *curr_pval;

	if (hdr_type >= __PEDIT_HDR_TYPE_MAX)
		goto out_err;

	curr_pmask = (u32 *)(pedit_header(masks, hdr_type) + offset);
	curr_pval  = (u32 *)(pedit_header(vals, hdr_type) + offset);

	if (*curr_pmask & mask)  /* disallow acting twice on the same location */
		goto out_err;

	*curr_pmask |= mask;
	*curr_pval  |= (val & mask);

	return 0;

out_err:
	return -EOPNOTSUPP;
}

struct mlx5_fields {
	u8  field;
	u8  size;
	u32 offset;
};

static struct mlx5_fields fields[] = {
	{MLX5_ACTION_IN_FIELD_OUT_DMAC_47_16, 4, offsetof(struct pedit_headers, eth.h_dest[0])},
	{MLX5_ACTION_IN_FIELD_OUT_DMAC_15_0,  2, offsetof(struct pedit_headers, eth.h_dest[4])},
	{MLX5_ACTION_IN_FIELD_OUT_SMAC_47_16, 4, offsetof(struct pedit_headers, eth.h_source[0])},
	{MLX5_ACTION_IN_FIELD_OUT_SMAC_15_0,  2, offsetof(struct pedit_headers, eth.h_source[4])},
	{MLX5_ACTION_IN_FIELD_OUT_ETHERTYPE,  2, offsetof(struct pedit_headers, eth.h_proto)},

	{MLX5_ACTION_IN_FIELD_OUT_IP_DSCP, 1, offsetof(struct pedit_headers, ip4.tos)},
	{MLX5_ACTION_IN_FIELD_OUT_IP_TTL,  1, offsetof(struct pedit_headers, ip4.ttl)},
	{MLX5_ACTION_IN_FIELD_OUT_SIPV4,   4, offsetof(struct pedit_headers, ip4.saddr)},
	{MLX5_ACTION_IN_FIELD_OUT_DIPV4,   4, offsetof(struct pedit_headers, ip4.daddr)},

	{MLX5_ACTION_IN_FIELD_OUT_SIPV6_127_96, 4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[0])},
	{MLX5_ACTION_IN_FIELD_OUT_SIPV6_95_64,  4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[1])},
	{MLX5_ACTION_IN_FIELD_OUT_SIPV6_63_32,  4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[2])},
	{MLX5_ACTION_IN_FIELD_OUT_SIPV6_31_0,   4, offsetof(struct pedit_headers, ip6.saddr.s6_addr32[3])},
	{MLX5_ACTION_IN_FIELD_OUT_DIPV6_127_96, 4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[0])},
	{MLX5_ACTION_IN_FIELD_OUT_DIPV6_95_64,  4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[1])},
	{MLX5_ACTION_IN_FIELD_OUT_DIPV6_63_32,  4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[2])},
	{MLX5_ACTION_IN_FIELD_OUT_DIPV6_31_0,   4, offsetof(struct pedit_headers, ip6.daddr.s6_addr32[3])},

	{MLX5_ACTION_IN_FIELD_OUT_TCP_SPORT, 2, offsetof(struct pedit_headers, tcp.source)},
	{MLX5_ACTION_IN_FIELD_OUT_TCP_DPORT, 2, offsetof(struct pedit_headers, tcp.dest)},
	{MLX5_ACTION_IN_FIELD_OUT_TCP_FLAGS, 1, offsetof(struct pedit_headers, tcp.ack_seq) + 5},

	{MLX5_ACTION_IN_FIELD_OUT_UDP_SPORT, 2, offsetof(struct pedit_headers, udp.source)},
	{MLX5_ACTION_IN_FIELD_OUT_UDP_DPORT, 2, offsetof(struct pedit_headers, udp.dest)},
};

/* On input attr->num_mod_hdr_actions tells how many HW actions can be parsed at
 * max from the SW pedit action. On success, it says how many HW actions were
 * actually parsed.
 */
static int offload_pedit_fields(struct pedit_headers *masks,
				struct pedit_headers *vals,
				struct mlx5e_tc_flow_parse_attr *parse_attr)
{
	struct pedit_headers *set_masks, *add_masks, *set_vals, *add_vals;
	int i, action_size, nactions, max_actions, first, last;
	void *s_masks_p, *a_masks_p, *vals_p;
	u32 s_mask, a_mask, val;
	struct mlx5_fields *f;
	u8 cmd, field_bsize;
	unsigned long mask;
	void *action;

	set_masks = &masks[TCA_PEDIT_KEY_EX_CMD_SET];
	add_masks = &masks[TCA_PEDIT_KEY_EX_CMD_ADD];
	set_vals = &vals[TCA_PEDIT_KEY_EX_CMD_SET];
	add_vals = &vals[TCA_PEDIT_KEY_EX_CMD_ADD];

	action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);
	action = parse_attr->mod_hdr_actions;
	max_actions = parse_attr->num_mod_hdr_actions;
	nactions = 0;

	for (i = 0; i < ARRAY_SIZE(fields); i++) {
		f = &fields[i];
		/* avoid seeing bits set from previous iterations */
		s_mask = a_mask = mask = val = 0;

		s_masks_p = (void *)set_masks + f->offset;
		a_masks_p = (void *)add_masks + f->offset;

		memcpy(&s_mask, s_masks_p, f->size);
		memcpy(&a_mask, a_masks_p, f->size);

		if (!s_mask && !a_mask) /* nothing to offload here */
			continue;

		if (s_mask && a_mask) {
			printk(KERN_WARNING "mlx5: can't set and add to the same HW field (%x)\n", f->field);
			return -EOPNOTSUPP;
		}

		if (nactions == max_actions) {
			printk(KERN_WARNING "mlx5: parsed %d pedit actions, can't do more\n", nactions);
			return -EOPNOTSUPP;
		}

		if (s_mask) {
			cmd  = MLX5_ACTION_TYPE_SET;
			mask = s_mask;
			vals_p = (void *)set_vals + f->offset;
			/* clear to denote we consumed this field */
			memset(s_masks_p, 0, f->size);
		} else {
			cmd  = MLX5_ACTION_TYPE_ADD;
			mask = a_mask;
			vals_p = (void *)add_vals + f->offset;
			/* clear to denote we consumed this field */
			memset(a_masks_p, 0, f->size);
		}

		memcpy(&val, vals_p, f->size);

		field_bsize = f->size * BITS_PER_BYTE;
		first = find_first_bit(&mask, field_bsize);
		last  = find_last_bit(&mask, field_bsize);
		if (first > 0 || last != (field_bsize - 1)) {
			printk(KERN_WARNING "mlx5: partial rewrite (mask %lx) is currently not offloaded\n",
			       mask);
			return -EOPNOTSUPP;
		}

		MLX5_SET(set_action_in, action, action_type, cmd);
		MLX5_SET(set_action_in, action, field, f->field);

		if (cmd == MLX5_ACTION_TYPE_SET) {
			MLX5_SET(set_action_in, action, offset, 0);
			/* length is num of bits to be written, zero means length of 32 */
			MLX5_SET(set_action_in, action, length, field_bsize);
		}

		if (field_bsize == 32)
			MLX5_SET(set_action_in, action, data, ntohl(val));
		else if (field_bsize == 16)
			MLX5_SET(set_action_in, action, data, ntohs(val));
		else if (field_bsize == 8)
			MLX5_SET(set_action_in, action, data, val);

		action += action_size;
		nactions++;
	}

	parse_attr->num_mod_hdr_actions = nactions;
	return 0;
}

static int alloc_mod_hdr_actions(struct mlx5e_priv *priv,
				 const struct tc_action *a, int namespace,
				 struct mlx5e_tc_flow_parse_attr *parse_attr)
{
	int nkeys, action_size, max_actions;

	nkeys = tcf_pedit_nkeys(a);
	action_size = MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto);

	if (namespace == MLX5_FLOW_NAMESPACE_FDB) /* FDB offloading */
		max_actions = MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, max_modify_header_actions);
	else /* namespace is MLX5_FLOW_NAMESPACE_KERNEL - NIC offloading */
		max_actions = MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, max_modify_header_actions);

	/* can get up to crazingly 16 HW actions in 32 bits pedit SW key */
	max_actions = min(max_actions, nkeys * 16);

	parse_attr->mod_hdr_actions = kcalloc(max_actions, action_size, GFP_KERNEL);
	if (!parse_attr->mod_hdr_actions)
		return -ENOMEM;

	parse_attr->num_mod_hdr_actions = max_actions;
	return 0;
}

static const struct pedit_headers zero_masks = {};

static int parse_tc_pedit_action(struct mlx5e_priv *priv,
				 const struct tc_action *a, int namespace,
				 struct mlx5e_tc_flow_parse_attr *parse_attr)
{
	struct pedit_headers masks[__PEDIT_CMD_MAX], vals[__PEDIT_CMD_MAX], *cmd_masks;
	int nkeys, i, err = -EOPNOTSUPP;
	u32 mask, val, offset;
	u8 cmd, htype;

	nkeys = tcf_pedit_nkeys(a);

	memset(masks, 0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);
	memset(vals,  0, sizeof(struct pedit_headers) * __PEDIT_CMD_MAX);

	for (i = 0; i < nkeys; i++) {
		htype = tcf_pedit_htype(a, i);
		cmd = tcf_pedit_cmd(a, i);
		err = -EOPNOTSUPP; /* can't be all optimistic */

		if (htype == TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK) {
			printk(KERN_WARNING "mlx5: legacy pedit isn't offloaded\n");
			goto out_err;
		}

		if (cmd != TCA_PEDIT_KEY_EX_CMD_SET && cmd != TCA_PEDIT_KEY_EX_CMD_ADD) {
			printk(KERN_WARNING "mlx5: pedit cmd %d isn't offloaded\n", cmd);
			goto out_err;
		}

		mask = tcf_pedit_mask(a, i);
		val = tcf_pedit_val(a, i);
		offset = tcf_pedit_offset(a, i);

		err = set_pedit_val(htype, ~mask, val, offset, &masks[cmd], &vals[cmd]);
		if (err)
			goto out_err;
	}

	err = alloc_mod_hdr_actions(priv, a, namespace, parse_attr);
	if (err)
		goto out_err;

	err = offload_pedit_fields(masks, vals, parse_attr);
	if (err < 0)
		goto out_dealloc_parsed_actions;

	for (cmd = 0; cmd < __PEDIT_CMD_MAX; cmd++) {
		cmd_masks = &masks[cmd];
		if (memcmp(cmd_masks, &zero_masks, sizeof(zero_masks))) {
			printk(KERN_WARNING "mlx5: attempt to offload an unsupported field (cmd %d)\n",
			       cmd);
			print_hex_dump(KERN_WARNING, "mask: ", DUMP_PREFIX_ADDRESS,
				       16, 1, cmd_masks, sizeof(zero_masks), true);
			err = -EOPNOTSUPP;
			goto out_dealloc_parsed_actions;
		}
	}

	return 0;

out_dealloc_parsed_actions:
	kfree(parse_attr->mod_hdr_actions);
out_err:
	return err;
}

static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
				struct mlx5e_tc_flow_parse_attr *parse_attr,
				struct mlx5e_tc_flow *flow)
{
	struct mlx5_nic_flow_attr *attr = flow->nic_attr;
	const struct tc_action *a;
	LIST_HEAD(actions);
	int err;

	if (tc_no_actions(exts))
		return -EINVAL;

	attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
	attr->action = 0;

	tcf_exts_to_list(exts, &actions);
	list_for_each_entry(a, &actions, list) {
		/* Only support a single action per rule */
		if (attr->action)
			return -EINVAL;

		if (is_tcf_gact_shot(a)) {
			attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
			if (MLX5_CAP_FLOWTABLE(priv->mdev,
					       flow_table_properties_nic_receive.flow_counter))
				attr->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
			continue;
		}

		if (is_tcf_pedit(a)) {
			err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_KERNEL,
						    parse_attr);
			if (err)
				return err;

			attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR |
					MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
			continue;
		}

		if (is_tcf_skbedit_mark(a)) {
			u32 mark = tcf_skbedit_mark(a);

			if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
				netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
					    mark);
				return -EINVAL;
			}

			attr->flow_tag = mark;
			attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
			continue;
		}

		return -EINVAL;
	}

	return 0;
}

static inline int cmp_encap_info(struct ip_tunnel_key *a,
				 struct ip_tunnel_key *b)
{
	return memcmp(a, b, sizeof(*a));
}

static inline int hash_encap_info(struct ip_tunnel_key *key)
{
	return jhash(key, sizeof(*key), 0);
}

static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
				   struct net_device *mirred_dev,
				   struct net_device **out_dev,
				   struct flowi4 *fl4,
				   struct neighbour **out_n,
				   int *out_ttl)
{
	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
	struct rtable *rt;
	struct neighbour *n = NULL;

#if IS_ENABLED(CONFIG_INET)
	int ret;

	rt = ip_route_output_key(dev_net(mirred_dev), fl4);
	ret = PTR_ERR_OR_ZERO(rt);
	if (ret)
		return ret;
#else
	return -EOPNOTSUPP;
#endif
	/* if the egress device isn't on the same HW e-switch, we use the uplink */
	if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev))
		*out_dev = mlx5_eswitch_get_uplink_netdev(esw);
	else
		*out_dev = rt->dst.dev;

	*out_ttl = ip4_dst_hoplimit(&rt->dst);
	n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
	ip_rt_put(rt);
	if (!n)
		return -ENOMEM;

	*out_n = n;
	return 0;
}

static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
				   struct net_device *mirred_dev,
				   struct net_device **out_dev,
				   struct flowi6 *fl6,
				   struct neighbour **out_n,
				   int *out_ttl)
{
	struct neighbour *n = NULL;
	struct dst_entry *dst;

#if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
	int ret;

	dst = ip6_route_output(dev_net(mirred_dev), NULL, fl6);
	ret = dst->error;
	if (ret) {
		dst_release(dst);
		return ret;
	}

	*out_ttl = ip6_dst_hoplimit(dst);

	/* if the egress device isn't on the same HW e-switch, we use the uplink */
	if (!switchdev_port_same_parent_id(priv->netdev, dst->dev))
		*out_dev = mlx5_eswitch_get_uplink_netdev(esw);
	else
		*out_dev = dst->dev;
#else
	return -EOPNOTSUPP;
#endif

	n = dst_neigh_lookup(dst, &fl6->daddr);
	dst_release(dst);
	if (!n)
		return -ENOMEM;

	*out_n = n;
	return 0;
}

static void gen_vxlan_header_ipv4(struct net_device *out_dev,
				  char buf[], int encap_size,
				  unsigned char h_dest[ETH_ALEN],
				  int ttl,
				  __be32 daddr,
				  __be32 saddr,
				  __be16 udp_dst_port,
				  __be32 vx_vni)
{
	struct ethhdr *eth = (struct ethhdr *)buf;
	struct iphdr  *ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
	struct udphdr *udp = (struct udphdr *)((char *)ip + sizeof(struct iphdr));
	struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));

	memset(buf, 0, encap_size);

	ether_addr_copy(eth->h_dest, h_dest);
	ether_addr_copy(eth->h_source, out_dev->dev_addr);
	eth->h_proto = htons(ETH_P_IP);

	ip->daddr = daddr;
	ip->saddr = saddr;

	ip->ttl = ttl;
	ip->protocol = IPPROTO_UDP;
	ip->version = 0x4;
	ip->ihl = 0x5;

	udp->dest = udp_dst_port;
	vxh->vx_flags = VXLAN_HF_VNI;
	vxh->vx_vni = vxlan_vni_field(vx_vni);
}

static void gen_vxlan_header_ipv6(struct net_device *out_dev,
				  char buf[], int encap_size,
				  unsigned char h_dest[ETH_ALEN],
				  int ttl,
				  struct in6_addr *daddr,
				  struct in6_addr *saddr,
				  __be16 udp_dst_port,
				  __be32 vx_vni)
{
	struct ethhdr *eth = (struct ethhdr *)buf;
	struct ipv6hdr *ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
	struct udphdr *udp = (struct udphdr *)((char *)ip6h + sizeof(struct ipv6hdr));
	struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));

	memset(buf, 0, encap_size);

	ether_addr_copy(eth->h_dest, h_dest);
	ether_addr_copy(eth->h_source, out_dev->dev_addr);
	eth->h_proto = htons(ETH_P_IPV6);

	ip6_flow_hdr(ip6h, 0, 0);
	/* the HW fills up ipv6 payload len */
	ip6h->nexthdr     = IPPROTO_UDP;
	ip6h->hop_limit   = ttl;
	ip6h->daddr	  = *daddr;
	ip6h->saddr	  = *saddr;

	udp->dest = udp_dst_port;
	vxh->vx_flags = VXLAN_HF_VNI;
	vxh->vx_vni = vxlan_vni_field(vx_vni);
}

static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
					  struct net_device *mirred_dev,
					  struct mlx5e_encap_entry *e)
{
	int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
	int ipv4_encap_size = ETH_HLEN + sizeof(struct iphdr) + VXLAN_HLEN;
	struct ip_tunnel_key *tun_key = &e->tun_info.key;
	struct net_device *out_dev;
	struct neighbour *n = NULL;
	struct flowi4 fl4 = {};
	char *encap_header;
	int ttl, err;
	u8 nud_state;

	if (max_encap_size < ipv4_encap_size) {
		mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
			       ipv4_encap_size, max_encap_size);
		return -EOPNOTSUPP;
	}

	encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL);
	if (!encap_header)
		return -ENOMEM;

	switch (e->tunnel_type) {
	case MLX5_HEADER_TYPE_VXLAN:
		fl4.flowi4_proto = IPPROTO_UDP;
		fl4.fl4_dport = tun_key->tp_dst;
		break;
	default:
		err = -EOPNOTSUPP;
		goto out;
	}
	fl4.flowi4_tos = tun_key->tos;
	fl4.daddr = tun_key->u.ipv4.dst;
	fl4.saddr = tun_key->u.ipv4.src;

	err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
				      &fl4, &n, &ttl);
	if (err)
		goto out;

	/* used by mlx5e_detach_encap to lookup a neigh hash table
	 * entry in the neigh hash table when a user deletes a rule
	 */
	e->m_neigh.dev = n->dev;
	e->m_neigh.family = n->ops->family;
	memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
	e->out_dev = out_dev;

	/* It's importent to add the neigh to the hash table before checking
	 * the neigh validity state. So if we'll get a notification, in case the
	 * neigh changes it's validity state, we would find the relevant neigh
	 * in the hash.
	 */
	err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
	if (err)
		goto out;

	read_lock_bh(&n->lock);
	nud_state = n->nud_state;
	ether_addr_copy(e->h_dest, n->ha);
	read_unlock_bh(&n->lock);

	switch (e->tunnel_type) {
	case MLX5_HEADER_TYPE_VXLAN:
		gen_vxlan_header_ipv4(out_dev, encap_header,
				      ipv4_encap_size, e->h_dest, ttl,
				      fl4.daddr,
				      fl4.saddr, tun_key->tp_dst,
				      tunnel_id_to_key32(tun_key->tun_id));
		break;
	default:
		err = -EOPNOTSUPP;
		goto destroy_neigh_entry;
	}
	e->encap_size = ipv4_encap_size;
	e->encap_header = encap_header;

	if (!(nud_state & NUD_VALID)) {
		neigh_event_send(n, NULL);
		neigh_release(n);
		return -EAGAIN;
	}

	err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
			       ipv4_encap_size, encap_header, &e->encap_id);
	if (err)
		goto destroy_neigh_entry;

	e->flags |= MLX5_ENCAP_ENTRY_VALID;
	mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
	neigh_release(n);
	return err;

destroy_neigh_entry:
	mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
out:
	kfree(encap_header);
	if (n)
		neigh_release(n);
	return err;
}

static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
					  struct net_device *mirred_dev,
					  struct mlx5e_encap_entry *e)
{
	int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
	int ipv6_encap_size = ETH_HLEN + sizeof(struct ipv6hdr) + VXLAN_HLEN;
	struct ip_tunnel_key *tun_key = &e->tun_info.key;
	struct net_device *out_dev;
	struct neighbour *n = NULL;
	struct flowi6 fl6 = {};
	char *encap_header;
	int err, ttl = 0;
	u8 nud_state;

	if (max_encap_size < ipv6_encap_size) {
		mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
			       ipv6_encap_size, max_encap_size);
		return -EOPNOTSUPP;
	}

	encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL);
	if (!encap_header)
		return -ENOMEM;

	switch (e->tunnel_type) {
	case MLX5_HEADER_TYPE_VXLAN:
		fl6.flowi6_proto = IPPROTO_UDP;
		fl6.fl6_dport = tun_key->tp_dst;
		break;
	default:
		err = -EOPNOTSUPP;
		goto out;
	}

	fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
	fl6.daddr = tun_key->u.ipv6.dst;
	fl6.saddr = tun_key->u.ipv6.src;

	err = mlx5e_route_lookup_ipv6(priv, mirred_dev, &out_dev,
				      &fl6, &n, &ttl);
	if (err)
		goto out;

	/* used by mlx5e_detach_encap to lookup a neigh hash table
	 * entry in the neigh hash table when a user deletes a rule
	 */
	e->m_neigh.dev = n->dev;
	e->m_neigh.family = n->ops->family;
	memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
	e->out_dev = out_dev;

	/* It's importent to add the neigh to the hash table before checking
	 * the neigh validity state. So if we'll get a notification, in case the
	 * neigh changes it's validity state, we would find the relevant neigh
	 * in the hash.
	 */
	err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
	if (err)
		goto out;

	read_lock_bh(&n->lock);
	nud_state = n->nud_state;
	ether_addr_copy(e->h_dest, n->ha);
	read_unlock_bh(&n->lock);

	switch (e->tunnel_type) {
	case MLX5_HEADER_TYPE_VXLAN:
		gen_vxlan_header_ipv6(out_dev, encap_header,
				      ipv6_encap_size, e->h_dest, ttl,
				      &fl6.daddr,
				      &fl6.saddr, tun_key->tp_dst,
				      tunnel_id_to_key32(tun_key->tun_id));
		break;
	default:
		err = -EOPNOTSUPP;
		goto destroy_neigh_entry;
	}

	e->encap_size = ipv6_encap_size;
	e->encap_header = encap_header;

	if (!(nud_state & NUD_VALID)) {
		neigh_event_send(n, NULL);
		neigh_release(n);
		return -EAGAIN;
	}

	err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
			       ipv6_encap_size, encap_header, &e->encap_id);
	if (err)
		goto destroy_neigh_entry;

	e->flags |= MLX5_ENCAP_ENTRY_VALID;
	mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
	neigh_release(n);
	return err;

destroy_neigh_entry:
	mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
out:
	kfree(encap_header);
	if (n)
		neigh_release(n);
	return err;
}

static int mlx5e_attach_encap(struct mlx5e_priv *priv,
			      struct ip_tunnel_info *tun_info,
			      struct net_device *mirred_dev,
			      struct net_device **encap_dev,
			      struct mlx5e_tc_flow *flow)
{
	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
	struct net_device *up_dev = mlx5_eswitch_get_uplink_netdev(esw);
	unsigned short family = ip_tunnel_info_af(tun_info);
	struct mlx5e_priv *up_priv = netdev_priv(up_dev);
	struct mlx5_esw_flow_attr *attr = flow->esw_attr;
	struct ip_tunnel_key *key = &tun_info->key;
	struct mlx5e_encap_entry *e;
	int tunnel_type, err = 0;
	uintptr_t hash_key;
	bool found = false;

	/* udp dst port must be set */
	if (!memchr_inv(&key->tp_dst, 0, sizeof(key->tp_dst)))
		goto vxlan_encap_offload_err;

	/* setting udp src port isn't supported */
	if (memchr_inv(&key->tp_src, 0, sizeof(key->tp_src))) {
vxlan_encap_offload_err:
		netdev_warn(priv->netdev,
			    "must set udp dst port and not set udp src port\n");
		return -EOPNOTSUPP;
	}

	if (mlx5e_vxlan_lookup_port(up_priv, be16_to_cpu(key->tp_dst)) &&
	    MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap)) {
		tunnel_type = MLX5_HEADER_TYPE_VXLAN;
	} else {
		netdev_warn(priv->netdev,
			    "%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->tp_dst));
		return -EOPNOTSUPP;
	}

	hash_key = hash_encap_info(key);

	hash_for_each_possible_rcu(esw->offloads.encap_tbl, e,
				   encap_hlist, hash_key) {
		if (!cmp_encap_info(&e->tun_info.key, key)) {
			found = true;
			break;
		}
	}

	if (found)
		goto attach_flow;

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

	e->tun_info = *tun_info;
	e->tunnel_type = tunnel_type;
	INIT_LIST_HEAD(&e->flows);

	if (family == AF_INET)
		err = mlx5e_create_encap_header_ipv4(priv, mirred_dev, e);
	else if (family == AF_INET6)
		err = mlx5e_create_encap_header_ipv6(priv, mirred_dev, e);

	if (err && err != -EAGAIN)
		goto out_err;

	hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);

attach_flow:
	list_add(&flow->encap, &e->flows);
	*encap_dev = e->out_dev;
	if (e->flags & MLX5_ENCAP_ENTRY_VALID)
		attr->encap_id = e->encap_id;

	return err;

out_err:
	kfree(e);
	return err;
}

static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
				struct mlx5e_tc_flow_parse_attr *parse_attr,
				struct mlx5e_tc_flow *flow)
{
	struct mlx5_esw_flow_attr *attr = flow->esw_attr;
	struct mlx5e_rep_priv *rpriv = priv->ppriv;
	struct ip_tunnel_info *info = NULL;
	const struct tc_action *a;
	LIST_HEAD(actions);
	bool encap = false;
	int err = 0;

	if (tc_no_actions(exts))
		return -EINVAL;

	memset(attr, 0, sizeof(*attr));
	attr->in_rep = rpriv->rep;

	tcf_exts_to_list(exts, &actions);
	list_for_each_entry(a, &actions, list) {
		if (is_tcf_gact_shot(a)) {
			attr->action |= MLX5_FLOW_CONTEXT_ACTION_DROP |
					MLX5_FLOW_CONTEXT_ACTION_COUNT;
			continue;
		}

		if (is_tcf_pedit(a)) {
			err = parse_tc_pedit_action(priv, a, MLX5_FLOW_NAMESPACE_FDB,
						    parse_attr);
			if (err)
				return err;

			attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
			continue;
		}

		if (is_tcf_mirred_egress_redirect(a)) {
			int ifindex = tcf_mirred_ifindex(a);
			struct net_device *out_dev, *encap_dev = NULL;
			struct mlx5e_priv *out_priv;

			out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);

			if (switchdev_port_same_parent_id(priv->netdev,
							  out_dev)) {
				attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
					MLX5_FLOW_CONTEXT_ACTION_COUNT;
				out_priv = netdev_priv(out_dev);
				rpriv = out_priv->ppriv;
				attr->out_rep = rpriv->rep;
			} else if (encap) {
				err = mlx5e_attach_encap(priv, info,
							 out_dev, &encap_dev, flow);
				if (err && err != -EAGAIN)
					return err;
				attr->action |= MLX5_FLOW_CONTEXT_ACTION_ENCAP |
					MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
					MLX5_FLOW_CONTEXT_ACTION_COUNT;
				out_priv = netdev_priv(encap_dev);
				rpriv = out_priv->ppriv;
				attr->out_rep = rpriv->rep;
				attr->parse_attr = parse_attr;
			} else {
				pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
				       priv->netdev->name, out_dev->name);
				return -EINVAL;
			}
			continue;
		}

		if (is_tcf_tunnel_set(a)) {
			info = tcf_tunnel_info(a);
			if (info)
				encap = true;
			else
				return -EOPNOTSUPP;
			continue;
		}

		if (is_tcf_vlan(a)) {
			if (tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
				attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
			} else if (tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
				if (tcf_vlan_push_proto(a) != htons(ETH_P_8021Q))
					return -EOPNOTSUPP;

				attr->action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
				attr->vlan = tcf_vlan_push_vid(a);
			} else { /* action is TCA_VLAN_ACT_MODIFY */
				return -EOPNOTSUPP;
			}
			continue;
		}

		if (is_tcf_tunnel_release(a)) {
			attr->action |= MLX5_FLOW_CONTEXT_ACTION_DECAP;
			continue;
		}

		return -EINVAL;
	}
	return err;
}

int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
			   struct tc_cls_flower_offload *f)
{
	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
	struct mlx5e_tc_flow_parse_attr *parse_attr;
	struct mlx5e_tc_table *tc = &priv->fs.tc;
	struct mlx5e_tc_flow *flow;
	int attr_size, err = 0;
	u8 flow_flags = 0;

	if (esw && esw->mode == SRIOV_OFFLOADS) {
		flow_flags = MLX5E_TC_FLOW_ESWITCH;
		attr_size  = sizeof(struct mlx5_esw_flow_attr);
	} else {
		flow_flags = MLX5E_TC_FLOW_NIC;
		attr_size  = sizeof(struct mlx5_nic_flow_attr);
	}

	flow = kzalloc(sizeof(*flow) + attr_size, GFP_KERNEL);
	parse_attr = mlx5_vzalloc(sizeof(*parse_attr));
	if (!parse_attr || !flow) {
		err = -ENOMEM;
		goto err_free;
	}

	flow->cookie = f->cookie;
	flow->flags = flow_flags;

	err = parse_cls_flower(priv, flow, &parse_attr->spec, f);
	if (err < 0)
		goto err_free;

	if (flow->flags & MLX5E_TC_FLOW_ESWITCH) {
		err = parse_tc_fdb_actions(priv, f->exts, parse_attr, flow);
		if (err < 0)
			goto err_handle_encap_flow;
		flow->rule = mlx5e_tc_add_fdb_flow(priv, parse_attr, flow);
	} else {
		err = parse_tc_nic_actions(priv, f->exts, parse_attr, flow);
		if (err < 0)
			goto err_free;
		flow->rule = mlx5e_tc_add_nic_flow(priv, parse_attr, flow);
	}

	if (IS_ERR(flow->rule)) {
		err = PTR_ERR(flow->rule);
		goto err_free;
	}

	flow->flags |= MLX5E_TC_FLOW_OFFLOADED;
	err = rhashtable_insert_fast(&tc->ht, &flow->node,
				     tc->ht_params);
	if (err)
		goto err_del_rule;

	if (flow->flags & MLX5E_TC_FLOW_ESWITCH &&
	    !(flow->esw_attr->action & MLX5_FLOW_CONTEXT_ACTION_ENCAP))
		kvfree(parse_attr);
	return err;

err_del_rule:
	mlx5e_tc_del_flow(priv, flow);

err_handle_encap_flow:
	if (err == -EAGAIN) {
		err = rhashtable_insert_fast(&tc->ht, &flow->node,
					     tc->ht_params);
		if (err)
			mlx5e_tc_del_flow(priv, flow);
		else
			return 0;
	}

err_free:
	kvfree(parse_attr);
	kfree(flow);
	return err;
}

int mlx5e_delete_flower(struct mlx5e_priv *priv,
			struct tc_cls_flower_offload *f)
{
	struct mlx5e_tc_flow *flow;
	struct mlx5e_tc_table *tc = &priv->fs.tc;

	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
				      tc->ht_params);
	if (!flow)
		return -EINVAL;

	rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);

	mlx5e_tc_del_flow(priv, flow);

	kfree(flow);

	return 0;
}

int mlx5e_stats_flower(struct mlx5e_priv *priv,
		       struct tc_cls_flower_offload *f)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;
	struct mlx5e_tc_flow *flow;
	struct tc_action *a;
	struct mlx5_fc *counter;
	LIST_HEAD(actions);
	u64 bytes;
	u64 packets;
	u64 lastuse;

	flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
				      tc->ht_params);
	if (!flow)
		return -EINVAL;

	if (!(flow->flags & MLX5E_TC_FLOW_OFFLOADED))
		return 0;

	counter = mlx5_flow_rule_counter(flow->rule);
	if (!counter)
		return 0;

	mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);

	preempt_disable();

	tcf_exts_to_list(f->exts, &actions);
	list_for_each_entry(a, &actions, list)
		tcf_action_stats_update(a, bytes, packets, lastuse);

	preempt_enable();

	return 0;
}

static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
	.head_offset = offsetof(struct mlx5e_tc_flow, node),
	.key_offset = offsetof(struct mlx5e_tc_flow, cookie),
	.key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
	.automatic_shrinking = true,
};

int mlx5e_tc_init(struct mlx5e_priv *priv)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;

	tc->ht_params = mlx5e_tc_flow_ht_params;
	return rhashtable_init(&tc->ht, &tc->ht_params);
}

static void _mlx5e_tc_del_flow(void *ptr, void *arg)
{
	struct mlx5e_tc_flow *flow = ptr;
	struct mlx5e_priv *priv = arg;

	mlx5e_tc_del_flow(priv, flow);
	kfree(flow);
}

void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
{
	struct mlx5e_tc_table *tc = &priv->fs.tc;

	rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);

	if (!IS_ERR_OR_NULL(tc->t)) {
		mlx5_destroy_flow_table(tc->t);
		tc->t = NULL;
	}
}