/* SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright(c) 2019-2021 Xilinx, Inc.
 * Copyright(c) 2019 Solarflare Communications Inc.
 *
 * This software was jointly developed between OKTET Labs (under contract
 * for Solarflare) and Solarflare Communications, Inc.
 */

#include <stdbool.h>

#include <rte_bitops.h>
#include <rte_common.h>
#include <rte_vxlan.h>

#include "efx.h"

#include "sfc.h"
#include "sfc_flow_tunnel.h"
#include "sfc_mae_counter.h"
#include "sfc_log.h"
#include "sfc_switch.h"
#include "sfc_service.h"

static int
sfc_mae_assign_ethdev_mport(struct sfc_adapter *sa,
			    efx_mport_sel_t *mportp)
{
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);

	return efx_mae_mport_by_pcie_function(encp->enc_pf, encp->enc_vf,
					      mportp);
}

static int
sfc_mae_assign_entity_mport(struct sfc_adapter *sa,
			    efx_mport_sel_t *mportp)
{
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	int rc = 0;

	if (encp->enc_mae_admin) {
		/*
		 * This ethdev sits on MAE admin PF. The represented
		 * entity is the network port assigned to that PF.
		 */
		rc = efx_mae_mport_by_phy_port(encp->enc_assigned_port, mportp);
	} else {
		/*
		 * This ethdev sits on unprivileged PF / VF. The entity
		 * represented by the ethdev can change dynamically
		 * as MAE admin changes default traffic rules.
		 *
		 * For the sake of simplicity, do not fill in the m-port
		 * and assume that flow rules should not be allowed to
		 * reference the entity represented by this ethdev.
		 */
		efx_mae_mport_invalid(mportp);
	}

	return rc;
}

static int
sfc_mae_counter_registry_init(struct sfc_mae_counter_registry *registry,
			      uint32_t nb_counters_max)
{
	return sfc_mae_counters_init(&registry->counters, nb_counters_max);
}

static void
sfc_mae_counter_registry_fini(struct sfc_mae_counter_registry *registry)
{
	sfc_mae_counters_fini(&registry->counters);
}

static int
sfc_mae_internal_rule_find_empty_slot(struct sfc_adapter *sa,
				      struct sfc_mae_rule **rule)
{
	struct sfc_mae *mae = &sa->mae;
	struct sfc_mae_internal_rules *internal_rules = &mae->internal_rules;
	unsigned int entry;
	int rc;

	for (entry = 0; entry < SFC_MAE_NB_RULES_MAX; entry++) {
		if (internal_rules->rules[entry].spec == NULL)
			break;
	}

	if (entry == SFC_MAE_NB_RULES_MAX) {
		rc = ENOSPC;
		sfc_err(sa, "failed too many rules (%u rules used)", entry);
		goto fail_too_many_rules;
	}

	*rule = &internal_rules->rules[entry];

	return 0;

fail_too_many_rules:
	return rc;
}

int
sfc_mae_rule_add_mport_match_deliver(struct sfc_adapter *sa,
				     const efx_mport_sel_t *mport_match,
				     const efx_mport_sel_t *mport_deliver,
				     int prio, struct sfc_mae_rule **rulep)
{
	struct sfc_mae *mae = &sa->mae;
	struct sfc_mae_rule *rule;
	int rc;

	sfc_log_init(sa, "entry");

	if (prio > 0 && (unsigned int)prio >= mae->nb_action_rule_prios_max) {
		rc = EINVAL;
		sfc_err(sa, "failed: invalid priority %d (max %u)", prio,
			mae->nb_action_rule_prios_max);
		goto fail_invalid_prio;
	}
	if (prio < 0)
		prio = mae->nb_action_rule_prios_max - 1;

	rc = sfc_mae_internal_rule_find_empty_slot(sa, &rule);
	if (rc != 0)
		goto fail_find_empty_slot;

	sfc_log_init(sa, "init MAE match spec");
	rc = efx_mae_match_spec_init(sa->nic, EFX_MAE_RULE_ACTION,
				     (uint32_t)prio, &rule->spec);
	if (rc != 0) {
		sfc_err(sa, "failed to init MAE match spec");
		goto fail_match_init;
	}

	rc = efx_mae_match_spec_mport_set(rule->spec, mport_match, NULL);
	if (rc != 0) {
		sfc_err(sa, "failed to get MAE match mport selector");
		goto fail_mport_set;
	}

	rc = efx_mae_action_set_spec_init(sa->nic, &rule->actions);
	if (rc != 0) {
		sfc_err(sa, "failed to init MAE action set");
		goto fail_action_init;
	}

	rc = efx_mae_action_set_populate_deliver(rule->actions,
						 mport_deliver);
	if (rc != 0) {
		sfc_err(sa, "failed to populate deliver action");
		goto fail_populate_deliver;
	}

	rc = efx_mae_action_set_alloc(sa->nic, rule->actions,
				      &rule->action_set);
	if (rc != 0) {
		sfc_err(sa, "failed to allocate action set");
		goto fail_action_set_alloc;
	}

	rc = efx_mae_action_rule_insert(sa->nic, rule->spec, NULL,
					&rule->action_set,
					&rule->rule_id);
	if (rc != 0) {
		sfc_err(sa, "failed to insert action rule");
		goto fail_rule_insert;
	}

	*rulep = rule;

	sfc_log_init(sa, "done");

	return 0;

fail_rule_insert:
	efx_mae_action_set_free(sa->nic, &rule->action_set);

fail_action_set_alloc:
fail_populate_deliver:
	efx_mae_action_set_spec_fini(sa->nic, rule->actions);

fail_action_init:
fail_mport_set:
	efx_mae_match_spec_fini(sa->nic, rule->spec);

fail_match_init:
fail_find_empty_slot:
fail_invalid_prio:
	sfc_log_init(sa, "failed: %s", rte_strerror(rc));
	return rc;
}

void
sfc_mae_rule_del(struct sfc_adapter *sa, struct sfc_mae_rule *rule)
{
	if (rule == NULL || rule->spec == NULL)
		return;

	efx_mae_action_rule_remove(sa->nic, &rule->rule_id);
	efx_mae_action_set_free(sa->nic, &rule->action_set);
	efx_mae_action_set_spec_fini(sa->nic, rule->actions);
	efx_mae_match_spec_fini(sa->nic, rule->spec);

	rule->spec = NULL;
}

int
sfc_mae_attach(struct sfc_adapter *sa)
{
	struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
	struct sfc_mae_switch_port_request switch_port_request = {0};
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	efx_mport_sel_t ethdev_mport;
	efx_mport_sel_t entity_mport;
	struct sfc_mae *mae = &sa->mae;
	struct sfc_mae_bounce_eh *bounce_eh = &mae->bounce_eh;
	efx_mae_limits_t limits;
	int rc;

	sfc_log_init(sa, "entry");

	if (!encp->enc_mae_supported) {
		mae->status = SFC_MAE_STATUS_UNSUPPORTED;
		return 0;
	}

	if (encp->enc_mae_admin) {
		sfc_log_init(sa, "init MAE");
		rc = efx_mae_init(sa->nic);
		if (rc != 0)
			goto fail_mae_init;

		sfc_log_init(sa, "get MAE limits");
		rc = efx_mae_get_limits(sa->nic, &limits);
		if (rc != 0)
			goto fail_mae_get_limits;

		sfc_log_init(sa, "init MAE counter registry");
		rc = sfc_mae_counter_registry_init(&mae->counter_registry,
						   limits.eml_max_n_counters);
		if (rc != 0) {
			sfc_err(sa, "failed to init MAE counters registry for %u entries: %s",
				limits.eml_max_n_counters, rte_strerror(rc));
			goto fail_counter_registry_init;
		}
	}

	sfc_log_init(sa, "assign ethdev MPORT");
	rc = sfc_mae_assign_ethdev_mport(sa, &ethdev_mport);
	if (rc != 0)
		goto fail_mae_assign_ethdev_mport;

	sfc_log_init(sa, "assign entity MPORT");
	rc = sfc_mae_assign_entity_mport(sa, &entity_mport);
	if (rc != 0)
		goto fail_mae_assign_entity_mport;

	sfc_log_init(sa, "assign RTE switch domain");
	rc = sfc_mae_assign_switch_domain(sa, &mae->switch_domain_id);
	if (rc != 0)
		goto fail_mae_assign_switch_domain;

	sfc_log_init(sa, "assign RTE switch port");
	switch_port_request.type = SFC_MAE_SWITCH_PORT_INDEPENDENT;
	switch_port_request.ethdev_mportp = &ethdev_mport;
	switch_port_request.entity_mportp = &entity_mport;
	switch_port_request.ethdev_port_id = sas->port_id;
	switch_port_request.port_data.indep.mae_admin =
		encp->enc_mae_admin == B_TRUE;
	rc = sfc_mae_assign_switch_port(mae->switch_domain_id,
					&switch_port_request,
					&mae->switch_port_id);
	if (rc != 0)
		goto fail_mae_assign_switch_port;

	if (encp->enc_mae_admin) {
		sfc_log_init(sa, "allocate encap. header bounce buffer");
		bounce_eh->buf_size = limits.eml_encap_header_size_limit;
		bounce_eh->buf = rte_malloc("sfc_mae_bounce_eh",
					    bounce_eh->buf_size, 0);
		if (bounce_eh->buf == NULL)
			goto fail_mae_alloc_bounce_eh;

		mae->nb_outer_rule_prios_max = limits.eml_max_n_outer_prios;
		mae->nb_action_rule_prios_max = limits.eml_max_n_action_prios;
		mae->encap_types_supported = limits.eml_encap_types_supported;
	}

	TAILQ_INIT(&mae->outer_rules);
	TAILQ_INIT(&mae->mac_addrs);
	TAILQ_INIT(&mae->encap_headers);
	TAILQ_INIT(&mae->action_sets);

	if (encp->enc_mae_admin)
		mae->status = SFC_MAE_STATUS_ADMIN;
	else
		mae->status = SFC_MAE_STATUS_SUPPORTED;

	sfc_log_init(sa, "done");

	return 0;

fail_mae_alloc_bounce_eh:
fail_mae_assign_switch_port:
fail_mae_assign_switch_domain:
fail_mae_assign_entity_mport:
fail_mae_assign_ethdev_mport:
	if (encp->enc_mae_admin)
		sfc_mae_counter_registry_fini(&mae->counter_registry);

fail_counter_registry_init:
fail_mae_get_limits:
	if (encp->enc_mae_admin)
		efx_mae_fini(sa->nic);

fail_mae_init:
	sfc_log_init(sa, "failed %d", rc);

	return rc;
}

void
sfc_mae_detach(struct sfc_adapter *sa)
{
	struct sfc_mae *mae = &sa->mae;
	enum sfc_mae_status status_prev = mae->status;

	sfc_log_init(sa, "entry");

	mae->nb_action_rule_prios_max = 0;
	mae->status = SFC_MAE_STATUS_UNKNOWN;

	if (status_prev != SFC_MAE_STATUS_ADMIN)
		return;

	rte_free(mae->bounce_eh.buf);
	sfc_mae_counter_registry_fini(&mae->counter_registry);

	efx_mae_fini(sa->nic);

	sfc_log_init(sa, "done");
}

static struct sfc_mae_outer_rule *
sfc_mae_outer_rule_attach(struct sfc_adapter *sa,
			  const efx_mae_match_spec_t *match_spec,
			  efx_tunnel_protocol_t encap_type)
{
	struct sfc_mae_outer_rule *rule;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	TAILQ_FOREACH(rule, &mae->outer_rules, entries) {
		if (efx_mae_match_specs_equal(rule->match_spec, match_spec) &&
		    rule->encap_type == encap_type) {
			sfc_dbg(sa, "attaching to outer_rule=%p", rule);
			++(rule->refcnt);
			return rule;
		}
	}

	return NULL;
}

static int
sfc_mae_outer_rule_add(struct sfc_adapter *sa,
		       efx_mae_match_spec_t *match_spec,
		       efx_tunnel_protocol_t encap_type,
		       struct sfc_mae_outer_rule **rulep)
{
	struct sfc_mae_outer_rule *rule;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	rule = rte_zmalloc("sfc_mae_outer_rule", sizeof(*rule), 0);
	if (rule == NULL)
		return ENOMEM;

	rule->refcnt = 1;
	rule->match_spec = match_spec;
	rule->encap_type = encap_type;

	rule->fw_rsrc.rule_id.id = EFX_MAE_RSRC_ID_INVALID;

	TAILQ_INSERT_TAIL(&mae->outer_rules, rule, entries);

	*rulep = rule;

	sfc_dbg(sa, "added outer_rule=%p", rule);

	return 0;
}

static void
sfc_mae_outer_rule_del(struct sfc_adapter *sa,
		       struct sfc_mae_outer_rule *rule)
{
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(rule->refcnt != 0);

	--(rule->refcnt);

	if (rule->refcnt != 0)
		return;

	if (rule->fw_rsrc.rule_id.id != EFX_MAE_RSRC_ID_INVALID ||
	    rule->fw_rsrc.refcnt != 0) {
		sfc_err(sa, "deleting outer_rule=%p abandons its FW resource: OR_ID=0x%08x, refcnt=%u",
			rule, rule->fw_rsrc.rule_id.id, rule->fw_rsrc.refcnt);
	}

	efx_mae_match_spec_fini(sa->nic, rule->match_spec);

	TAILQ_REMOVE(&mae->outer_rules, rule, entries);
	rte_free(rule);

	sfc_dbg(sa, "deleted outer_rule=%p", rule);
}

static int
sfc_mae_outer_rule_enable(struct sfc_adapter *sa,
			  struct sfc_mae_outer_rule *rule,
			  efx_mae_match_spec_t *match_spec_action)
{
	struct sfc_mae_fw_rsrc *fw_rsrc = &rule->fw_rsrc;
	int rc;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	if (fw_rsrc->refcnt == 0) {
		SFC_ASSERT(fw_rsrc->rule_id.id == EFX_MAE_RSRC_ID_INVALID);
		SFC_ASSERT(rule->match_spec != NULL);

		rc = efx_mae_outer_rule_insert(sa->nic, rule->match_spec,
					       rule->encap_type,
					       &fw_rsrc->rule_id);
		if (rc != 0) {
			sfc_err(sa, "failed to enable outer_rule=%p: %s",
				rule, strerror(rc));
			return rc;
		}
	}

	if (match_spec_action == NULL)
		goto skip_action_rule;

	rc = efx_mae_match_spec_outer_rule_id_set(match_spec_action,
						  &fw_rsrc->rule_id);
	if (rc != 0) {
		if (fw_rsrc->refcnt == 0) {
			(void)efx_mae_outer_rule_remove(sa->nic,
							&fw_rsrc->rule_id);
			fw_rsrc->rule_id.id = EFX_MAE_RSRC_ID_INVALID;
		}

		sfc_err(sa, "can't match on outer rule ID: %s", strerror(rc));

		return rc;
	}

skip_action_rule:
	if (fw_rsrc->refcnt == 0) {
		sfc_dbg(sa, "enabled outer_rule=%p: OR_ID=0x%08x",
			rule, fw_rsrc->rule_id.id);
	}

	++(fw_rsrc->refcnt);

	return 0;
}

static void
sfc_mae_outer_rule_disable(struct sfc_adapter *sa,
			   struct sfc_mae_outer_rule *rule)
{
	struct sfc_mae_fw_rsrc *fw_rsrc = &rule->fw_rsrc;
	int rc;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	if (fw_rsrc->rule_id.id == EFX_MAE_RSRC_ID_INVALID ||
	    fw_rsrc->refcnt == 0) {
		sfc_err(sa, "failed to disable outer_rule=%p: already disabled; OR_ID=0x%08x, refcnt=%u",
			rule, fw_rsrc->rule_id.id, fw_rsrc->refcnt);
		return;
	}

	if (fw_rsrc->refcnt == 1) {
		rc = efx_mae_outer_rule_remove(sa->nic, &fw_rsrc->rule_id);
		if (rc == 0) {
			sfc_dbg(sa, "disabled outer_rule=%p with OR_ID=0x%08x",
				rule, fw_rsrc->rule_id.id);
		} else {
			sfc_err(sa, "failed to disable outer_rule=%p with OR_ID=0x%08x: %s",
				rule, fw_rsrc->rule_id.id, strerror(rc));
		}
		fw_rsrc->rule_id.id = EFX_MAE_RSRC_ID_INVALID;
	}

	--(fw_rsrc->refcnt);
}

static struct sfc_mae_mac_addr *
sfc_mae_mac_addr_attach(struct sfc_adapter *sa,
			const uint8_t addr_bytes[EFX_MAC_ADDR_LEN])
{
	struct sfc_mae_mac_addr *mac_addr;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	TAILQ_FOREACH(mac_addr, &mae->mac_addrs, entries) {
		if (memcmp(mac_addr->addr_bytes, addr_bytes,
			   EFX_MAC_ADDR_LEN) == 0) {
			sfc_dbg(sa, "attaching to mac_addr=%p", mac_addr);
			++(mac_addr->refcnt);
			return mac_addr;
		}
	}

	return NULL;
}

static int
sfc_mae_mac_addr_add(struct sfc_adapter *sa,
		     const uint8_t addr_bytes[EFX_MAC_ADDR_LEN],
		     struct sfc_mae_mac_addr **mac_addrp)
{
	struct sfc_mae_mac_addr *mac_addr;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	mac_addr = rte_zmalloc("sfc_mae_mac_addr", sizeof(*mac_addr), 0);
	if (mac_addr == NULL)
		return ENOMEM;

	rte_memcpy(mac_addr->addr_bytes, addr_bytes, EFX_MAC_ADDR_LEN);

	mac_addr->refcnt = 1;
	mac_addr->fw_rsrc.mac_id.id = EFX_MAE_RSRC_ID_INVALID;

	TAILQ_INSERT_TAIL(&mae->mac_addrs, mac_addr, entries);

	*mac_addrp = mac_addr;

	sfc_dbg(sa, "added mac_addr=%p", mac_addr);

	return 0;
}

static void
sfc_mae_mac_addr_del(struct sfc_adapter *sa, struct sfc_mae_mac_addr *mac_addr)
{
	struct sfc_mae *mae = &sa->mae;

	if (mac_addr == NULL)
		return;

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(mac_addr->refcnt != 0);

	--(mac_addr->refcnt);

	if (mac_addr->refcnt != 0)
		return;

	if (mac_addr->fw_rsrc.mac_id.id != EFX_MAE_RSRC_ID_INVALID ||
	    mac_addr->fw_rsrc.refcnt != 0) {
		sfc_err(sa, "deleting mac_addr=%p abandons its FW resource: MAC_ID=0x%08x, refcnt=%u",
			mac_addr, mac_addr->fw_rsrc.mac_id.id,
			mac_addr->fw_rsrc.refcnt);
	}

	TAILQ_REMOVE(&mae->mac_addrs, mac_addr, entries);
	rte_free(mac_addr);

	sfc_dbg(sa, "deleted mac_addr=%p", mac_addr);
}

enum sfc_mae_mac_addr_type {
	SFC_MAE_MAC_ADDR_DST,
	SFC_MAE_MAC_ADDR_SRC
};

static int
sfc_mae_mac_addr_enable(struct sfc_adapter *sa,
			struct sfc_mae_mac_addr *mac_addr,
			enum sfc_mae_mac_addr_type type,
			efx_mae_actions_t *aset_spec)
{
	struct sfc_mae_fw_rsrc *fw_rsrc;
	int rc = 0;

	if (mac_addr == NULL)
		return 0;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	fw_rsrc = &mac_addr->fw_rsrc;

	if (fw_rsrc->refcnt == 0) {
		SFC_ASSERT(fw_rsrc->mac_id.id == EFX_MAE_RSRC_ID_INVALID);

		rc = efx_mae_mac_addr_alloc(sa->nic, mac_addr->addr_bytes,
					    &fw_rsrc->mac_id);
		if (rc != 0) {
			sfc_err(sa, "failed to enable mac_addr=%p: %s",
				mac_addr, strerror(rc));
			return rc;
		}
	}

	switch (type) {
	case SFC_MAE_MAC_ADDR_DST:
		rc = efx_mae_action_set_fill_in_dst_mac_id(aset_spec,
							   &fw_rsrc->mac_id);
		break;
	case SFC_MAE_MAC_ADDR_SRC:
		rc = efx_mae_action_set_fill_in_src_mac_id(aset_spec,
							   &fw_rsrc->mac_id);
		break;
	default:
		rc = EINVAL;
		break;
	}

	if (rc != 0) {
		if (fw_rsrc->refcnt == 0) {
			(void)efx_mae_mac_addr_free(sa->nic, &fw_rsrc->mac_id);
			fw_rsrc->mac_id.id = EFX_MAE_RSRC_ID_INVALID;
		}

		sfc_err(sa, "cannot fill in MAC address entry ID: %s",
			strerror(rc));

		return rc;
	}

	if (fw_rsrc->refcnt == 0) {
		sfc_dbg(sa, "enabled mac_addr=%p: MAC_ID=0x%08x",
			mac_addr, fw_rsrc->mac_id.id);
	}

	++(fw_rsrc->refcnt);

	return 0;
}

static void
sfc_mae_mac_addr_disable(struct sfc_adapter *sa,
			 struct sfc_mae_mac_addr *mac_addr)
{
	struct sfc_mae_fw_rsrc *fw_rsrc;
	int rc;

	if (mac_addr == NULL)
		return;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	fw_rsrc = &mac_addr->fw_rsrc;

	if (fw_rsrc->mac_id.id == EFX_MAE_RSRC_ID_INVALID ||
	    fw_rsrc->refcnt == 0) {
		sfc_err(sa, "failed to disable mac_addr=%p: already disabled; MAC_ID=0x%08x, refcnt=%u",
			mac_addr, fw_rsrc->mac_id.id, fw_rsrc->refcnt);
		return;
	}

	if (fw_rsrc->refcnt == 1) {
		rc = efx_mae_mac_addr_free(sa->nic, &fw_rsrc->mac_id);
		if (rc == 0) {
			sfc_dbg(sa, "disabled mac_addr=%p with MAC_ID=0x%08x",
				mac_addr, fw_rsrc->mac_id.id);
		} else {
			sfc_err(sa, "failed to disable mac_addr=%p with MAC_ID=0x%08x: %s",
				mac_addr, fw_rsrc->mac_id.id, strerror(rc));
		}
		fw_rsrc->mac_id.id = EFX_MAE_RSRC_ID_INVALID;
	}

	--(fw_rsrc->refcnt);
}

static struct sfc_mae_encap_header *
sfc_mae_encap_header_attach(struct sfc_adapter *sa,
			    const struct sfc_mae_bounce_eh *bounce_eh)
{
	struct sfc_mae_encap_header *encap_header;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	TAILQ_FOREACH(encap_header, &mae->encap_headers, entries) {
		if (encap_header->size == bounce_eh->size &&
		    memcmp(encap_header->buf, bounce_eh->buf,
			   bounce_eh->size) == 0) {
			sfc_dbg(sa, "attaching to encap_header=%p",
				encap_header);
			++(encap_header->refcnt);
			return encap_header;
		}
	}

	return NULL;
}

static int
sfc_mae_encap_header_add(struct sfc_adapter *sa,
			 const struct sfc_mae_bounce_eh *bounce_eh,
			 struct sfc_mae_encap_header **encap_headerp)
{
	struct sfc_mae_encap_header *encap_header;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	encap_header = rte_zmalloc("sfc_mae_encap_header",
				   sizeof(*encap_header), 0);
	if (encap_header == NULL)
		return ENOMEM;

	encap_header->size = bounce_eh->size;

	encap_header->buf = rte_malloc("sfc_mae_encap_header_buf",
				       encap_header->size, 0);
	if (encap_header->buf == NULL) {
		rte_free(encap_header);
		return ENOMEM;
	}

	rte_memcpy(encap_header->buf, bounce_eh->buf, bounce_eh->size);

	encap_header->refcnt = 1;
	encap_header->type = bounce_eh->type;
	encap_header->fw_rsrc.eh_id.id = EFX_MAE_RSRC_ID_INVALID;

	TAILQ_INSERT_TAIL(&mae->encap_headers, encap_header, entries);

	*encap_headerp = encap_header;

	sfc_dbg(sa, "added encap_header=%p", encap_header);

	return 0;
}

static void
sfc_mae_encap_header_del(struct sfc_adapter *sa,
		       struct sfc_mae_encap_header *encap_header)
{
	struct sfc_mae *mae = &sa->mae;

	if (encap_header == NULL)
		return;

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(encap_header->refcnt != 0);

	--(encap_header->refcnt);

	if (encap_header->refcnt != 0)
		return;

	if (encap_header->fw_rsrc.eh_id.id != EFX_MAE_RSRC_ID_INVALID ||
	    encap_header->fw_rsrc.refcnt != 0) {
		sfc_err(sa, "deleting encap_header=%p abandons its FW resource: EH_ID=0x%08x, refcnt=%u",
			encap_header, encap_header->fw_rsrc.eh_id.id,
			encap_header->fw_rsrc.refcnt);
	}

	TAILQ_REMOVE(&mae->encap_headers, encap_header, entries);
	rte_free(encap_header->buf);
	rte_free(encap_header);

	sfc_dbg(sa, "deleted encap_header=%p", encap_header);
}

static int
sfc_mae_encap_header_enable(struct sfc_adapter *sa,
			    struct sfc_mae_encap_header *encap_header,
			    efx_mae_actions_t *action_set_spec)
{
	struct sfc_mae_fw_rsrc *fw_rsrc;
	int rc;

	if (encap_header == NULL)
		return 0;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	fw_rsrc = &encap_header->fw_rsrc;

	if (fw_rsrc->refcnt == 0) {
		SFC_ASSERT(fw_rsrc->eh_id.id == EFX_MAE_RSRC_ID_INVALID);
		SFC_ASSERT(encap_header->buf != NULL);
		SFC_ASSERT(encap_header->size != 0);

		rc = efx_mae_encap_header_alloc(sa->nic, encap_header->type,
						encap_header->buf,
						encap_header->size,
						&fw_rsrc->eh_id);
		if (rc != 0) {
			sfc_err(sa, "failed to enable encap_header=%p: %s",
				encap_header, strerror(rc));
			return rc;
		}
	}

	rc = efx_mae_action_set_fill_in_eh_id(action_set_spec,
					      &fw_rsrc->eh_id);
	if (rc != 0) {
		if (fw_rsrc->refcnt == 0) {
			(void)efx_mae_encap_header_free(sa->nic,
							&fw_rsrc->eh_id);
			fw_rsrc->eh_id.id = EFX_MAE_RSRC_ID_INVALID;
		}

		sfc_err(sa, "can't fill in encap. header ID: %s", strerror(rc));

		return rc;
	}

	if (fw_rsrc->refcnt == 0) {
		sfc_dbg(sa, "enabled encap_header=%p: EH_ID=0x%08x",
			encap_header, fw_rsrc->eh_id.id);
	}

	++(fw_rsrc->refcnt);

	return 0;
}

static void
sfc_mae_encap_header_disable(struct sfc_adapter *sa,
			     struct sfc_mae_encap_header *encap_header)
{
	struct sfc_mae_fw_rsrc *fw_rsrc;
	int rc;

	if (encap_header == NULL)
		return;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	fw_rsrc = &encap_header->fw_rsrc;

	if (fw_rsrc->eh_id.id == EFX_MAE_RSRC_ID_INVALID ||
	    fw_rsrc->refcnt == 0) {
		sfc_err(sa, "failed to disable encap_header=%p: already disabled; EH_ID=0x%08x, refcnt=%u",
			encap_header, fw_rsrc->eh_id.id, fw_rsrc->refcnt);
		return;
	}

	if (fw_rsrc->refcnt == 1) {
		rc = efx_mae_encap_header_free(sa->nic, &fw_rsrc->eh_id);
		if (rc == 0) {
			sfc_dbg(sa, "disabled encap_header=%p with EH_ID=0x%08x",
				encap_header, fw_rsrc->eh_id.id);
		} else {
			sfc_err(sa, "failed to disable encap_header=%p with EH_ID=0x%08x: %s",
				encap_header, fw_rsrc->eh_id.id, strerror(rc));
		}
		fw_rsrc->eh_id.id = EFX_MAE_RSRC_ID_INVALID;
	}

	--(fw_rsrc->refcnt);
}

static int
sfc_mae_counters_enable(struct sfc_adapter *sa,
			struct sfc_mae_counter_id *counters,
			unsigned int n_counters,
			efx_mae_actions_t *action_set_spec)
{
	int rc;

	sfc_log_init(sa, "entry");

	if (n_counters == 0) {
		sfc_log_init(sa, "no counters - skip");
		return 0;
	}

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(n_counters == 1);

	rc = sfc_mae_counter_enable(sa, &counters[0]);
	if (rc != 0) {
		sfc_err(sa, "failed to enable MAE counter %u: %s",
			counters[0].mae_id.id, rte_strerror(rc));
		goto fail_counter_add;
	}

	rc = efx_mae_action_set_fill_in_counter_id(action_set_spec,
						   &counters[0].mae_id);
	if (rc != 0) {
		sfc_err(sa, "failed to fill in MAE counter %u in action set: %s",
			counters[0].mae_id.id, rte_strerror(rc));
		goto fail_fill_in_id;
	}

	return 0;

fail_fill_in_id:
	(void)sfc_mae_counter_disable(sa, &counters[0]);

fail_counter_add:
	sfc_log_init(sa, "failed: %s", rte_strerror(rc));
	return rc;
}

static int
sfc_mae_counters_disable(struct sfc_adapter *sa,
			 struct sfc_mae_counter_id *counters,
			 unsigned int n_counters)
{
	if (n_counters == 0)
		return 0;

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(n_counters == 1);

	if (counters[0].mae_id.id == EFX_MAE_RSRC_ID_INVALID) {
		sfc_err(sa, "failed to disable: already disabled");
		return EALREADY;
	}

	return sfc_mae_counter_disable(sa, &counters[0]);
}

struct sfc_mae_aset_ctx {
	uint64_t			*ft_switch_hit_counter;
	struct sfc_ft_ctx		*counter_ft_ctx;
	struct sfc_mae_encap_header	*encap_header;
	unsigned int			n_counters;
	struct sfc_mae_mac_addr		*dst_mac;
	struct sfc_mae_mac_addr		*src_mac;

	efx_mae_actions_t		*spec;
};

static struct sfc_mae_action_set *
sfc_mae_action_set_attach(struct sfc_adapter *sa,
			  const struct sfc_mae_aset_ctx *ctx)
{
	struct sfc_mae_action_set *action_set;
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	/*
	 * Shared counters are not supported, hence, action
	 * sets with counters are not attachable.
	 */
	if (ctx->n_counters != 0)
		return NULL;

	TAILQ_FOREACH(action_set, &mae->action_sets, entries) {
		if (action_set->encap_header == ctx->encap_header &&
		    action_set->dst_mac_addr == ctx->dst_mac &&
		    action_set->src_mac_addr == ctx->src_mac &&
		    efx_mae_action_set_specs_equal(action_set->spec,
						   ctx->spec)) {
			sfc_dbg(sa, "attaching to action_set=%p", action_set);
			++(action_set->refcnt);
			return action_set;
		}
	}

	return NULL;
}

static int
sfc_mae_action_set_add(struct sfc_adapter *sa,
		       const struct rte_flow_action actions[],
		       const struct sfc_mae_aset_ctx *ctx,
		       struct sfc_mae_action_set **action_setp)
{
	struct sfc_mae_action_set *action_set;
	struct sfc_mae *mae = &sa->mae;
	unsigned int i;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	action_set = rte_zmalloc("sfc_mae_action_set", sizeof(*action_set), 0);
	if (action_set == NULL) {
		sfc_err(sa, "failed to alloc action set");
		return ENOMEM;
	}

	if (ctx->n_counters > 0) {
		const struct rte_flow_action *action;

		action_set->counters = rte_malloc("sfc_mae_counter_ids",
			sizeof(action_set->counters[0]) * ctx->n_counters, 0);
		if (action_set->counters == NULL) {
			rte_free(action_set);
			sfc_err(sa, "failed to alloc counters");
			return ENOMEM;
		}

		for (i = 0; i < ctx->n_counters; ++i) {
			action_set->counters[i].rte_id_valid = B_FALSE;
			action_set->counters[i].mae_id.id =
				EFX_MAE_RSRC_ID_INVALID;

			action_set->counters[i].ft_ctx = ctx->counter_ft_ctx;
			action_set->counters[i].ft_switch_hit_counter =
				ctx->ft_switch_hit_counter;
		}

		for (action = actions, i = 0;
		     action->type != RTE_FLOW_ACTION_TYPE_END &&
		     i < ctx->n_counters; ++action) {
			const struct rte_flow_action_count *conf;

			if (action->type != RTE_FLOW_ACTION_TYPE_COUNT)
				continue;

			conf = action->conf;

			action_set->counters[i].rte_id_valid = B_TRUE;
			action_set->counters[i].rte_id = conf->id;
			i++;
		}
		action_set->n_counters = ctx->n_counters;
	}

	action_set->refcnt = 1;
	action_set->spec = ctx->spec;
	action_set->encap_header = ctx->encap_header;
	action_set->dst_mac_addr = ctx->dst_mac;
	action_set->src_mac_addr = ctx->src_mac;

	action_set->fw_rsrc.aset_id.id = EFX_MAE_RSRC_ID_INVALID;

	TAILQ_INSERT_TAIL(&mae->action_sets, action_set, entries);

	*action_setp = action_set;

	sfc_dbg(sa, "added action_set=%p", action_set);

	return 0;
}

static void
sfc_mae_action_set_del(struct sfc_adapter *sa,
		       struct sfc_mae_action_set *action_set)
{
	struct sfc_mae *mae = &sa->mae;

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(action_set->refcnt != 0);

	--(action_set->refcnt);

	if (action_set->refcnt != 0)
		return;

	if (action_set->fw_rsrc.aset_id.id != EFX_MAE_RSRC_ID_INVALID ||
	    action_set->fw_rsrc.refcnt != 0) {
		sfc_err(sa, "deleting action_set=%p abandons its FW resource: AS_ID=0x%08x, refcnt=%u",
			action_set, action_set->fw_rsrc.aset_id.id,
			action_set->fw_rsrc.refcnt);
	}

	efx_mae_action_set_spec_fini(sa->nic, action_set->spec);
	sfc_mae_encap_header_del(sa, action_set->encap_header);
	sfc_mae_mac_addr_del(sa, action_set->dst_mac_addr);
	sfc_mae_mac_addr_del(sa, action_set->src_mac_addr);
	if (action_set->n_counters > 0) {
		SFC_ASSERT(action_set->n_counters == 1);
		SFC_ASSERT(action_set->counters[0].mae_id.id ==
			   EFX_MAE_RSRC_ID_INVALID);
		rte_free(action_set->counters);
	}
	TAILQ_REMOVE(&mae->action_sets, action_set, entries);
	rte_free(action_set);

	sfc_dbg(sa, "deleted action_set=%p", action_set);
}

static int
sfc_mae_action_set_enable(struct sfc_adapter *sa,
			  struct sfc_mae_action_set *action_set)
{
	struct sfc_mae_encap_header *encap_header = action_set->encap_header;
	struct sfc_mae_mac_addr *dst_mac_addr = action_set->dst_mac_addr;
	struct sfc_mae_mac_addr *src_mac_addr = action_set->src_mac_addr;
	struct sfc_mae_counter_id *counters = action_set->counters;
	struct sfc_mae_fw_rsrc *fw_rsrc = &action_set->fw_rsrc;
	int rc;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	if (fw_rsrc->refcnt == 0) {
		SFC_ASSERT(fw_rsrc->aset_id.id == EFX_MAE_RSRC_ID_INVALID);
		SFC_ASSERT(action_set->spec != NULL);

		rc = sfc_mae_mac_addr_enable(sa, dst_mac_addr,
					     SFC_MAE_MAC_ADDR_DST,
					     action_set->spec);
		if (rc != 0)
			return rc;

		rc = sfc_mae_mac_addr_enable(sa, src_mac_addr,
					     SFC_MAE_MAC_ADDR_SRC,
					     action_set->spec);
		if (rc != 0) {
			sfc_mae_mac_addr_disable(sa, dst_mac_addr);
			return rc;
		}

		rc = sfc_mae_encap_header_enable(sa, encap_header,
						 action_set->spec);
		if (rc != 0) {
			sfc_mae_mac_addr_disable(sa, src_mac_addr);
			sfc_mae_mac_addr_disable(sa, dst_mac_addr);
			return rc;
		}

		rc = sfc_mae_counters_enable(sa, counters,
					     action_set->n_counters,
					     action_set->spec);
		if (rc != 0) {
			sfc_err(sa, "failed to enable %u MAE counters: %s",
				action_set->n_counters, rte_strerror(rc));

			sfc_mae_encap_header_disable(sa, encap_header);
			sfc_mae_mac_addr_disable(sa, src_mac_addr);
			sfc_mae_mac_addr_disable(sa, dst_mac_addr);
			return rc;
		}

		rc = efx_mae_action_set_alloc(sa->nic, action_set->spec,
					      &fw_rsrc->aset_id);
		if (rc != 0) {
			sfc_err(sa, "failed to enable action_set=%p: %s",
				action_set, strerror(rc));

			(void)sfc_mae_counters_disable(sa, counters,
						       action_set->n_counters);
			sfc_mae_encap_header_disable(sa, encap_header);
			sfc_mae_mac_addr_disable(sa, src_mac_addr);
			sfc_mae_mac_addr_disable(sa, dst_mac_addr);
			return rc;
		}

		sfc_dbg(sa, "enabled action_set=%p: AS_ID=0x%08x",
			action_set, fw_rsrc->aset_id.id);
	}

	++(fw_rsrc->refcnt);

	return 0;
}

static void
sfc_mae_action_set_disable(struct sfc_adapter *sa,
			   struct sfc_mae_action_set *action_set)
{
	struct sfc_mae_fw_rsrc *fw_rsrc = &action_set->fw_rsrc;
	int rc;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	if (fw_rsrc->aset_id.id == EFX_MAE_RSRC_ID_INVALID ||
	    fw_rsrc->refcnt == 0) {
		sfc_err(sa, "failed to disable action_set=%p: already disabled; AS_ID=0x%08x, refcnt=%u",
			action_set, fw_rsrc->aset_id.id, fw_rsrc->refcnt);
		return;
	}

	if (fw_rsrc->refcnt == 1) {
		rc = efx_mae_action_set_free(sa->nic, &fw_rsrc->aset_id);
		if (rc == 0) {
			sfc_dbg(sa, "disabled action_set=%p with AS_ID=0x%08x",
				action_set, fw_rsrc->aset_id.id);
		} else {
			sfc_err(sa, "failed to disable action_set=%p with AS_ID=0x%08x: %s",
				action_set, fw_rsrc->aset_id.id, strerror(rc));
		}
		fw_rsrc->aset_id.id = EFX_MAE_RSRC_ID_INVALID;

		rc = sfc_mae_counters_disable(sa, action_set->counters,
					      action_set->n_counters);
		if (rc != 0) {
			sfc_err(sa, "failed to disable %u MAE counters: %s",
				action_set->n_counters, rte_strerror(rc));
		}

		sfc_mae_encap_header_disable(sa, action_set->encap_header);
		sfc_mae_mac_addr_disable(sa, action_set->src_mac_addr);
		sfc_mae_mac_addr_disable(sa, action_set->dst_mac_addr);
	}

	--(fw_rsrc->refcnt);
}

void
sfc_mae_flow_cleanup(struct sfc_adapter *sa,
		     struct rte_flow *flow)
{
	struct sfc_flow_spec_mae *spec_mae;

	if (flow == NULL)
		return;

	spec_mae = &flow->spec.mae;

	if (spec_mae->ft_ctx != NULL) {
		if (spec_mae->ft_rule_type == SFC_FT_RULE_TUNNEL)
			spec_mae->ft_ctx->tunnel_rule_is_set = B_FALSE;

		SFC_ASSERT(spec_mae->ft_ctx->refcnt != 0);
		--(spec_mae->ft_ctx->refcnt);
	}

	SFC_ASSERT(spec_mae->rule_id.id == EFX_MAE_RSRC_ID_INVALID);

	if (spec_mae->outer_rule != NULL)
		sfc_mae_outer_rule_del(sa, spec_mae->outer_rule);

	if (spec_mae->action_set != NULL)
		sfc_mae_action_set_del(sa, spec_mae->action_set);

	if (spec_mae->match_spec != NULL)
		efx_mae_match_spec_fini(sa->nic, spec_mae->match_spec);
}

static int
sfc_mae_set_ethertypes(struct sfc_mae_parse_ctx *ctx)
{
	struct sfc_mae_pattern_data *pdata = &ctx->pattern_data;
	const efx_mae_field_id_t *fremap = ctx->field_ids_remap;
	const efx_mae_field_id_t field_ids[] = {
		EFX_MAE_FIELD_VLAN0_PROTO_BE,
		EFX_MAE_FIELD_VLAN1_PROTO_BE,
	};
	const struct sfc_mae_ethertype *et;
	unsigned int i;
	int rc;

	/*
	 * In accordance with RTE flow API convention, the innermost L2
	 * item's "type" ("inner_type") is a L3 EtherType. If there is
	 * no L3 item, it's 0x0000/0x0000.
	 */
	et = &pdata->ethertypes[pdata->nb_vlan_tags];
	rc = efx_mae_match_spec_field_set(ctx->match_spec,
					  fremap[EFX_MAE_FIELD_ETHER_TYPE_BE],
					  sizeof(et->value),
					  (const uint8_t *)&et->value,
					  sizeof(et->mask),
					  (const uint8_t *)&et->mask);
	if (rc != 0)
		return rc;

	/*
	 * sfc_mae_rule_parse_item_vlan() has already made sure
	 * that pdata->nb_vlan_tags does not exceed this figure.
	 */
	RTE_BUILD_BUG_ON(SFC_MAE_MATCH_VLAN_MAX_NTAGS != 2);

	for (i = 0; i < pdata->nb_vlan_tags; ++i) {
		et = &pdata->ethertypes[i];

		rc = efx_mae_match_spec_field_set(ctx->match_spec,
						  fremap[field_ids[i]],
						  sizeof(et->value),
						  (const uint8_t *)&et->value,
						  sizeof(et->mask),
						  (const uint8_t *)&et->mask);
		if (rc != 0)
			return rc;
	}

	return 0;
}

static int
sfc_mae_rule_process_pattern_data(struct sfc_mae_parse_ctx *ctx,
				  struct rte_flow_error *error)
{
	const efx_mae_field_id_t *fremap = ctx->field_ids_remap;
	struct sfc_mae_pattern_data *pdata = &ctx->pattern_data;
	struct sfc_mae_ethertype *ethertypes = pdata->ethertypes;
	const rte_be16_t supported_tpids[] = {
		/* VLAN standard TPID (always the first element) */
		RTE_BE16(RTE_ETHER_TYPE_VLAN),

		/* Double-tagging TPIDs */
		RTE_BE16(RTE_ETHER_TYPE_QINQ),
		RTE_BE16(RTE_ETHER_TYPE_QINQ1),
		RTE_BE16(RTE_ETHER_TYPE_QINQ2),
		RTE_BE16(RTE_ETHER_TYPE_QINQ3),
	};
	bool enforce_tag_presence[SFC_MAE_MATCH_VLAN_MAX_NTAGS] = {0};
	unsigned int nb_supported_tpids = RTE_DIM(supported_tpids);
	unsigned int ethertype_idx;
	const uint8_t *valuep;
	const uint8_t *maskp;
	int rc;

	if (pdata->innermost_ethertype_restriction.mask != 0 &&
	    pdata->nb_vlan_tags < SFC_MAE_MATCH_VLAN_MAX_NTAGS) {
		/*
		 * If a single item VLAN is followed by a L3 item, value
		 * of "type" in item ETH can't be a double-tagging TPID.
		 */
		nb_supported_tpids = 1;
	}

	/*
	 * sfc_mae_rule_parse_item_vlan() has already made sure
	 * that pdata->nb_vlan_tags does not exceed this figure.
	 */
	RTE_BUILD_BUG_ON(SFC_MAE_MATCH_VLAN_MAX_NTAGS != 2);

	for (ethertype_idx = 0;
	     ethertype_idx < pdata->nb_vlan_tags; ++ethertype_idx) {
		rte_be16_t tpid_v = ethertypes[ethertype_idx].value;
		rte_be16_t tpid_m = ethertypes[ethertype_idx].mask;
		unsigned int tpid_idx;

		/*
		 * This loop can have only two iterations. On the second one,
		 * drop outer tag presence enforcement bit because the inner
		 * tag presence automatically assumes that for the outer tag.
		 */
		enforce_tag_presence[0] = B_FALSE;

		if (tpid_m == RTE_BE16(0)) {
			if (pdata->tci_masks[ethertype_idx] == RTE_BE16(0))
				enforce_tag_presence[ethertype_idx] = B_TRUE;

			/* No match on this field, and no value check. */
			nb_supported_tpids = 1;
			continue;
		}

		/* Exact match is supported only. */
		if (tpid_m != RTE_BE16(0xffff)) {
			sfc_err(ctx->sa, "TPID mask must be 0x0 or 0xffff; got 0x%04x",
				rte_be_to_cpu_16(tpid_m));
			rc = EINVAL;
			goto fail;
		}

		for (tpid_idx = pdata->nb_vlan_tags - ethertype_idx - 1;
		     tpid_idx < nb_supported_tpids; ++tpid_idx) {
			if (tpid_v == supported_tpids[tpid_idx])
				break;
		}

		if (tpid_idx == nb_supported_tpids) {
			sfc_err(ctx->sa, "TPID 0x%04x is unsupported",
				rte_be_to_cpu_16(tpid_v));
			rc = EINVAL;
			goto fail;
		}

		nb_supported_tpids = 1;
	}

	if (pdata->innermost_ethertype_restriction.mask == RTE_BE16(0xffff)) {
		struct sfc_mae_ethertype *et = &ethertypes[ethertype_idx];
		rte_be16_t enforced_et;

		enforced_et = pdata->innermost_ethertype_restriction.value;

		if (et->mask == 0) {
			et->mask = RTE_BE16(0xffff);
			et->value = enforced_et;
		} else if (et->mask != RTE_BE16(0xffff) ||
			   et->value != enforced_et) {
			sfc_err(ctx->sa, "L3 EtherType must be 0x0/0x0 or 0x%04x/0xffff; got 0x%04x/0x%04x",
				rte_be_to_cpu_16(enforced_et),
				rte_be_to_cpu_16(et->value),
				rte_be_to_cpu_16(et->mask));
			rc = EINVAL;
			goto fail;
		}
	}

	/*
	 * Now, when the number of VLAN tags is known, set fields
	 * ETHER_TYPE, VLAN0_PROTO and VLAN1_PROTO so that the first
	 * one is either a valid L3 EtherType (or 0x0000/0x0000),
	 * and the last two are valid TPIDs (or 0x0000/0x0000).
	 */
	rc = sfc_mae_set_ethertypes(ctx);
	if (rc != 0)
		goto fail;

	if (pdata->l3_next_proto_restriction_mask == 0xff) {
		if (pdata->l3_next_proto_mask == 0) {
			pdata->l3_next_proto_mask = 0xff;
			pdata->l3_next_proto_value =
				pdata->l3_next_proto_restriction_value;
		} else if (pdata->l3_next_proto_mask != 0xff ||
			   pdata->l3_next_proto_value !=
			   pdata->l3_next_proto_restriction_value) {
			sfc_err(ctx->sa, "L3 next protocol must be 0x0/0x0 or 0x%02x/0xff; got 0x%02x/0x%02x",
				pdata->l3_next_proto_restriction_value,
				pdata->l3_next_proto_value,
				pdata->l3_next_proto_mask);
			rc = EINVAL;
			goto fail;
		}
	}

	if (enforce_tag_presence[0] || pdata->has_ovlan_mask) {
		rc = efx_mae_match_spec_bit_set(ctx->match_spec,
						fremap[EFX_MAE_FIELD_HAS_OVLAN],
						enforce_tag_presence[0] ||
						pdata->has_ovlan_value);
		if (rc != 0)
			goto fail;
	}

	if (enforce_tag_presence[1] || pdata->has_ivlan_mask) {
		rc = efx_mae_match_spec_bit_set(ctx->match_spec,
						fremap[EFX_MAE_FIELD_HAS_IVLAN],
						enforce_tag_presence[1] ||
						pdata->has_ivlan_value);
		if (rc != 0)
			goto fail;
	}

	valuep = (const uint8_t *)&pdata->l3_next_proto_value;
	maskp = (const uint8_t *)&pdata->l3_next_proto_mask;
	rc = efx_mae_match_spec_field_set(ctx->match_spec,
					  fremap[EFX_MAE_FIELD_IP_PROTO],
					  sizeof(pdata->l3_next_proto_value),
					  valuep,
					  sizeof(pdata->l3_next_proto_mask),
					  maskp);
	if (rc != 0)
		goto fail;

	return 0;

fail:
	return rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ITEM, NULL,
				  "Failed to process pattern data");
}

static int
sfc_mae_rule_parse_item_mark(const struct rte_flow_item *item,
			     struct sfc_flow_parse_ctx *ctx,
			     struct rte_flow_error *error)
{
	const struct rte_flow_item_mark *spec = item->spec;
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	struct sfc_ft_ctx *ft_ctx = ctx_mae->ft_ctx;

	if (spec == NULL) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"NULL spec in item MARK");
	}

	/*
	 * This item is used in tunnel offload support only.
	 * It must go before any network header items. This
	 * way, sfc_mae_rule_preparse_item_mark() must have
	 * already parsed it. Only one item MARK is allowed.
	 */
	if (ctx_mae->ft_rule_type != SFC_FT_RULE_SWITCH ||
	    spec->id != (uint32_t)SFC_FT_CTX_ID_TO_FLOW_MARK(ft_ctx->id)) {
		return rte_flow_error_set(error, EINVAL,
					  RTE_FLOW_ERROR_TYPE_ITEM,
					  item, "invalid item MARK");
	}

	return 0;
}

static int
sfc_mae_rule_parse_item_port_id(const struct rte_flow_item *item,
				struct sfc_flow_parse_ctx *ctx,
				struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	const struct rte_flow_item_port_id supp_mask = {
		.id = 0xffffffff,
	};
	const void *def_mask = &rte_flow_item_port_id_mask;
	const struct rte_flow_item_port_id *spec = NULL;
	const struct rte_flow_item_port_id *mask = NULL;
	efx_mport_sel_t mport_sel;
	int rc;

	if (ctx_mae->match_mport_set) {
		return rte_flow_error_set(error, ENOTSUP,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Can't handle multiple traffic source items");
	}

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask, def_mask,
				 sizeof(struct rte_flow_item_port_id), error);
	if (rc != 0)
		return rc;

	if (mask->id != supp_mask.id) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Bad mask in the PORT_ID pattern item");
	}

	/* If "spec" is not set, could be any port ID */
	if (spec == NULL)
		return 0;

	if (spec->id > UINT16_MAX) {
		return rte_flow_error_set(error, EOVERFLOW,
					  RTE_FLOW_ERROR_TYPE_ITEM, item,
					  "The port ID is too large");
	}

	rc = sfc_mae_switch_get_ethdev_mport(ctx_mae->sa->mae.switch_domain_id,
					     spec->id, &mport_sel);
	if (rc != 0) {
		return rte_flow_error_set(error, rc,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Can't get m-port for the given ethdev");
	}

	rc = efx_mae_match_spec_mport_set(ctx_mae->match_spec,
					  &mport_sel, NULL);
	if (rc != 0) {
		return rte_flow_error_set(error, rc,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Failed to set MPORT for the port ID");
	}

	ctx_mae->match_mport_set = B_TRUE;

	return 0;
}

static int
sfc_mae_rule_parse_item_ethdev_based(const struct rte_flow_item *item,
				     struct sfc_flow_parse_ctx *ctx,
				     struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	const struct rte_flow_item_ethdev supp_mask = {
		.port_id = 0xffff,
	};
	const void *def_mask = &rte_flow_item_ethdev_mask;
	const struct rte_flow_item_ethdev *spec = NULL;
	const struct rte_flow_item_ethdev *mask = NULL;
	efx_mport_sel_t mport_sel;
	int rc;

	if (ctx_mae->match_mport_set) {
		return rte_flow_error_set(error, ENOTSUP,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Can't handle multiple traffic source items");
	}

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask, def_mask,
				 sizeof(struct rte_flow_item_ethdev), error);
	if (rc != 0)
		return rc;

	if (mask->port_id != supp_mask.port_id) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Bad mask in the ethdev-based pattern item");
	}

	/* If "spec" is not set, could be any port ID */
	if (spec == NULL)
		return 0;

	switch (item->type) {
	case RTE_FLOW_ITEM_TYPE_PORT_REPRESENTOR:
		rc = sfc_mae_switch_get_ethdev_mport(
				ctx_mae->sa->mae.switch_domain_id,
				spec->port_id, &mport_sel);
		if (rc != 0) {
			return rte_flow_error_set(error, rc,
					RTE_FLOW_ERROR_TYPE_ITEM, item,
					"Can't get m-port for the given ethdev");
		}
		break;
	case RTE_FLOW_ITEM_TYPE_REPRESENTED_PORT:
		rc = sfc_mae_switch_get_entity_mport(
				ctx_mae->sa->mae.switch_domain_id,
				spec->port_id, &mport_sel);
		if (rc != 0) {
			return rte_flow_error_set(error, rc,
					RTE_FLOW_ERROR_TYPE_ITEM, item,
					"Can't get m-port for the given ethdev");
		}
		break;
	default:
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Unsupported ethdev-based flow item");
	}

	rc = efx_mae_match_spec_mport_set(ctx_mae->match_spec,
					  &mport_sel, NULL);
	if (rc != 0) {
		return rte_flow_error_set(error, rc,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Failed to set MPORT for the port ID");
	}

	ctx_mae->match_mport_set = B_TRUE;

	return 0;
}

/*
 * Having this field ID in a field locator means that this
 * locator cannot be used to actually set the field at the
 * time when the corresponding item gets encountered. Such
 * fields get stashed in the parsing context instead. This
 * is required to resolve dependencies between the stashed
 * fields. See sfc_mae_rule_process_pattern_data().
 */
#define SFC_MAE_FIELD_HANDLING_DEFERRED	EFX_MAE_FIELD_NIDS

struct sfc_mae_field_locator {
	efx_mae_field_id_t		field_id;
	size_t				size;
	/* Field offset in the corresponding rte_flow_item_ struct */
	size_t				ofst;
};

static void
sfc_mae_item_build_supp_mask(const struct sfc_mae_field_locator *field_locators,
			     unsigned int nb_field_locators, void *mask_ptr,
			     size_t mask_size)
{
	unsigned int i;

	memset(mask_ptr, 0, mask_size);

	for (i = 0; i < nb_field_locators; ++i) {
		const struct sfc_mae_field_locator *fl = &field_locators[i];

		SFC_ASSERT(fl->ofst + fl->size <= mask_size);
		memset(RTE_PTR_ADD(mask_ptr, fl->ofst), 0xff, fl->size);
	}
}

static int
sfc_mae_parse_item(const struct sfc_mae_field_locator *field_locators,
		   unsigned int nb_field_locators, const uint8_t *spec,
		   const uint8_t *mask, struct sfc_mae_parse_ctx *ctx,
		   struct rte_flow_error *error)
{
	const efx_mae_field_id_t *fremap = ctx->field_ids_remap;
	unsigned int i;
	int rc = 0;

	for (i = 0; i < nb_field_locators; ++i) {
		const struct sfc_mae_field_locator *fl = &field_locators[i];

		if (fl->field_id == SFC_MAE_FIELD_HANDLING_DEFERRED)
			continue;

		rc = efx_mae_match_spec_field_set(ctx->match_spec,
						  fremap[fl->field_id],
						  fl->size, spec + fl->ofst,
						  fl->size, mask + fl->ofst);
		if (rc != 0)
			break;
	}

	if (rc != 0) {
		rc = rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ITEM,
				NULL, "Failed to process item fields");
	}

	return rc;
}

static const struct sfc_mae_field_locator flocs_eth[] = {
	{
		/*
		 * This locator is used only for building supported fields mask.
		 * The field is handled by sfc_mae_rule_process_pattern_data().
		 */
		SFC_MAE_FIELD_HANDLING_DEFERRED,
		RTE_SIZEOF_FIELD(struct rte_flow_item_eth, type),
		offsetof(struct rte_flow_item_eth, type),
	},
	{
		EFX_MAE_FIELD_ETH_DADDR_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_eth, dst),
		offsetof(struct rte_flow_item_eth, dst),
	},
	{
		EFX_MAE_FIELD_ETH_SADDR_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_eth, src),
		offsetof(struct rte_flow_item_eth, src),
	},
};

static int
sfc_mae_rule_parse_item_eth(const struct rte_flow_item *item,
			    struct sfc_flow_parse_ctx *ctx,
			    struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	struct rte_flow_item_eth override_mask;
	struct rte_flow_item_eth supp_mask;
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	int rc;

	sfc_mae_item_build_supp_mask(flocs_eth, RTE_DIM(flocs_eth),
				     &supp_mask, sizeof(supp_mask));
	supp_mask.has_vlan = 1;

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 &rte_flow_item_eth_mask,
				 sizeof(struct rte_flow_item_eth), error);
	if (rc != 0)
		return rc;

	if (ctx_mae->ft_rule_type == SFC_FT_RULE_TUNNEL && mask != NULL) {
		/*
		 * The HW/FW hasn't got support for match on MAC addresses in
		 * outer rules yet (this will change). Match on VLAN presence
		 * isn't supported either. Ignore these match criteria.
		 */
		memcpy(&override_mask, mask, sizeof(override_mask));
		memset(&override_mask.hdr.dst_addr, 0,
		       sizeof(override_mask.hdr.dst_addr));
		memset(&override_mask.hdr.src_addr, 0,
		       sizeof(override_mask.hdr.src_addr));
		override_mask.has_vlan = 0;

		mask = (const uint8_t *)&override_mask;
	}

	if (spec != NULL) {
		struct sfc_mae_pattern_data *pdata = &ctx_mae->pattern_data;
		struct sfc_mae_ethertype *ethertypes = pdata->ethertypes;
		const struct rte_flow_item_eth *item_spec;
		const struct rte_flow_item_eth *item_mask;

		item_spec = (const struct rte_flow_item_eth *)spec;
		item_mask = (const struct rte_flow_item_eth *)mask;

		/*
		 * Remember various match criteria in the parsing context.
		 * sfc_mae_rule_process_pattern_data() will consider them
		 * altogether when the rest of the items have been parsed.
		 */
		ethertypes[0].value = item_spec->type;
		ethertypes[0].mask = item_mask->type;
		if (item_mask->has_vlan) {
			pdata->has_ovlan_mask = B_TRUE;
			if (item_spec->has_vlan)
				pdata->has_ovlan_value = B_TRUE;
		}
	} else {
		/*
		 * The specification is empty. The overall pattern
		 * validity will be enforced at the end of parsing.
		 * See sfc_mae_rule_process_pattern_data().
		 */
		return 0;
	}

	return sfc_mae_parse_item(flocs_eth, RTE_DIM(flocs_eth), spec, mask,
				  ctx_mae, error);
}

static const struct sfc_mae_field_locator flocs_vlan[] = {
	/* Outermost tag */
	{
		EFX_MAE_FIELD_VLAN0_TCI_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_vlan, tci),
		offsetof(struct rte_flow_item_vlan, tci),
	},
	{
		/*
		 * This locator is used only for building supported fields mask.
		 * The field is handled by sfc_mae_rule_process_pattern_data().
		 */
		SFC_MAE_FIELD_HANDLING_DEFERRED,
		RTE_SIZEOF_FIELD(struct rte_flow_item_vlan, inner_type),
		offsetof(struct rte_flow_item_vlan, inner_type),
	},

	/* Innermost tag */
	{
		EFX_MAE_FIELD_VLAN1_TCI_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_vlan, tci),
		offsetof(struct rte_flow_item_vlan, tci),
	},
	{
		/*
		 * This locator is used only for building supported fields mask.
		 * The field is handled by sfc_mae_rule_process_pattern_data().
		 */
		SFC_MAE_FIELD_HANDLING_DEFERRED,
		RTE_SIZEOF_FIELD(struct rte_flow_item_vlan, inner_type),
		offsetof(struct rte_flow_item_vlan, inner_type),
	},
};

static int
sfc_mae_rule_parse_item_vlan(const struct rte_flow_item *item,
			     struct sfc_flow_parse_ctx *ctx,
			     struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	struct sfc_mae_pattern_data *pdata = &ctx_mae->pattern_data;
	boolean_t *has_vlan_mp_by_nb_tags[SFC_MAE_MATCH_VLAN_MAX_NTAGS] = {
		&pdata->has_ovlan_mask,
		&pdata->has_ivlan_mask,
	};
	boolean_t *has_vlan_vp_by_nb_tags[SFC_MAE_MATCH_VLAN_MAX_NTAGS] = {
		&pdata->has_ovlan_value,
		&pdata->has_ivlan_value,
	};
	boolean_t *cur_tag_presence_bit_mp;
	boolean_t *cur_tag_presence_bit_vp;
	const struct sfc_mae_field_locator *flocs;
	struct rte_flow_item_vlan supp_mask;
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	unsigned int nb_flocs;
	int rc;

	RTE_BUILD_BUG_ON(SFC_MAE_MATCH_VLAN_MAX_NTAGS != 2);

	if (pdata->nb_vlan_tags == SFC_MAE_MATCH_VLAN_MAX_NTAGS) {
		return rte_flow_error_set(error, ENOTSUP,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"Can't match that many VLAN tags");
	}

	cur_tag_presence_bit_mp = has_vlan_mp_by_nb_tags[pdata->nb_vlan_tags];
	cur_tag_presence_bit_vp = has_vlan_vp_by_nb_tags[pdata->nb_vlan_tags];

	if (*cur_tag_presence_bit_mp == B_TRUE &&
	    *cur_tag_presence_bit_vp == B_FALSE) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ITEM, item,
				"The previous item enforces no (more) VLAN, "
				"so the current item (VLAN) must not exist");
	}

	nb_flocs = RTE_DIM(flocs_vlan) / SFC_MAE_MATCH_VLAN_MAX_NTAGS;
	flocs = flocs_vlan + pdata->nb_vlan_tags * nb_flocs;

	sfc_mae_item_build_supp_mask(flocs, nb_flocs,
				     &supp_mask, sizeof(supp_mask));
	/*
	 * This only means that the field is supported by the driver and libefx.
	 * Support on NIC level will be checked when all items have been parsed.
	 */
	supp_mask.has_more_vlan = 1;

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 &rte_flow_item_vlan_mask,
				 sizeof(struct rte_flow_item_vlan), error);
	if (rc != 0)
		return rc;

	if (spec != NULL) {
		struct sfc_mae_ethertype *et = pdata->ethertypes;
		const struct rte_flow_item_vlan *item_spec;
		const struct rte_flow_item_vlan *item_mask;

		item_spec = (const struct rte_flow_item_vlan *)spec;
		item_mask = (const struct rte_flow_item_vlan *)mask;

		/*
		 * Remember various match criteria in the parsing context.
		 * sfc_mae_rule_process_pattern_data() will consider them
		 * altogether when the rest of the items have been parsed.
		 */
		et[pdata->nb_vlan_tags + 1].value = item_spec->inner_type;
		et[pdata->nb_vlan_tags + 1].mask = item_mask->inner_type;
		pdata->tci_masks[pdata->nb_vlan_tags] = item_mask->tci;
		if (item_mask->has_more_vlan) {
			if (pdata->nb_vlan_tags ==
			    SFC_MAE_MATCH_VLAN_MAX_NTAGS) {
				return rte_flow_error_set(error, ENOTSUP,
					RTE_FLOW_ERROR_TYPE_ITEM, item,
					"Can't use 'has_more_vlan' in "
					"the second item VLAN");
			}
			pdata->has_ivlan_mask = B_TRUE;
			if (item_spec->has_more_vlan)
				pdata->has_ivlan_value = B_TRUE;
		}

		/* Convert TCI to MAE representation right now. */
		rc = sfc_mae_parse_item(flocs, nb_flocs, spec, mask,
					ctx_mae, error);
		if (rc != 0)
			return rc;
	}

	++(pdata->nb_vlan_tags);

	return 0;
}

static const struct sfc_mae_field_locator flocs_ipv4[] = {
	{
		EFX_MAE_FIELD_SRC_IP4_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv4, hdr.src_addr),
		offsetof(struct rte_flow_item_ipv4, hdr.src_addr),
	},
	{
		EFX_MAE_FIELD_DST_IP4_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv4, hdr.dst_addr),
		offsetof(struct rte_flow_item_ipv4, hdr.dst_addr),
	},
	{
		/*
		 * This locator is used only for building supported fields mask.
		 * The field is handled by sfc_mae_rule_process_pattern_data().
		 */
		SFC_MAE_FIELD_HANDLING_DEFERRED,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv4, hdr.next_proto_id),
		offsetof(struct rte_flow_item_ipv4, hdr.next_proto_id),
	},
	{
		EFX_MAE_FIELD_IP_TOS,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv4,
				 hdr.type_of_service),
		offsetof(struct rte_flow_item_ipv4, hdr.type_of_service),
	},
	{
		EFX_MAE_FIELD_IP_TTL,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv4, hdr.time_to_live),
		offsetof(struct rte_flow_item_ipv4, hdr.time_to_live),
	},
};

static int
sfc_mae_rule_parse_item_ipv4(const struct rte_flow_item *item,
			     struct sfc_flow_parse_ctx *ctx,
			     struct rte_flow_error *error)
{
	rte_be16_t ethertype_ipv4_be = RTE_BE16(RTE_ETHER_TYPE_IPV4);
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	struct sfc_mae_pattern_data *pdata = &ctx_mae->pattern_data;
	struct rte_flow_item_ipv4 supp_mask;
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	int rc;

	sfc_mae_item_build_supp_mask(flocs_ipv4, RTE_DIM(flocs_ipv4),
				     &supp_mask, sizeof(supp_mask));

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 &rte_flow_item_ipv4_mask,
				 sizeof(struct rte_flow_item_ipv4), error);
	if (rc != 0)
		return rc;

	pdata->innermost_ethertype_restriction.value = ethertype_ipv4_be;
	pdata->innermost_ethertype_restriction.mask = RTE_BE16(0xffff);

	if (spec != NULL) {
		const struct rte_flow_item_ipv4 *item_spec;
		const struct rte_flow_item_ipv4 *item_mask;

		item_spec = (const struct rte_flow_item_ipv4 *)spec;
		item_mask = (const struct rte_flow_item_ipv4 *)mask;

		pdata->l3_next_proto_value = item_spec->hdr.next_proto_id;
		pdata->l3_next_proto_mask = item_mask->hdr.next_proto_id;
	} else {
		return 0;
	}

	return sfc_mae_parse_item(flocs_ipv4, RTE_DIM(flocs_ipv4), spec, mask,
				  ctx_mae, error);
}

static const struct sfc_mae_field_locator flocs_ipv6[] = {
	{
		EFX_MAE_FIELD_SRC_IP6_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv6, hdr.src_addr),
		offsetof(struct rte_flow_item_ipv6, hdr.src_addr),
	},
	{
		EFX_MAE_FIELD_DST_IP6_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv6, hdr.dst_addr),
		offsetof(struct rte_flow_item_ipv6, hdr.dst_addr),
	},
	{
		/*
		 * This locator is used only for building supported fields mask.
		 * The field is handled by sfc_mae_rule_process_pattern_data().
		 */
		SFC_MAE_FIELD_HANDLING_DEFERRED,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv6, hdr.proto),
		offsetof(struct rte_flow_item_ipv6, hdr.proto),
	},
	{
		EFX_MAE_FIELD_IP_TTL,
		RTE_SIZEOF_FIELD(struct rte_flow_item_ipv6, hdr.hop_limits),
		offsetof(struct rte_flow_item_ipv6, hdr.hop_limits),
	},
};

static int
sfc_mae_rule_parse_item_ipv6(const struct rte_flow_item *item,
			     struct sfc_flow_parse_ctx *ctx,
			     struct rte_flow_error *error)
{
	rte_be16_t ethertype_ipv6_be = RTE_BE16(RTE_ETHER_TYPE_IPV6);
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	const efx_mae_field_id_t *fremap = ctx_mae->field_ids_remap;
	struct sfc_mae_pattern_data *pdata = &ctx_mae->pattern_data;
	struct rte_flow_item_ipv6 supp_mask;
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	rte_be32_t vtc_flow_be;
	uint32_t vtc_flow;
	uint8_t tc_value;
	uint8_t tc_mask;
	int rc;

	sfc_mae_item_build_supp_mask(flocs_ipv6, RTE_DIM(flocs_ipv6),
				     &supp_mask, sizeof(supp_mask));

	vtc_flow_be = RTE_BE32(RTE_IPV6_HDR_TC_MASK);
	memcpy(&supp_mask, &vtc_flow_be, sizeof(vtc_flow_be));

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 &rte_flow_item_ipv6_mask,
				 sizeof(struct rte_flow_item_ipv6), error);
	if (rc != 0)
		return rc;

	pdata->innermost_ethertype_restriction.value = ethertype_ipv6_be;
	pdata->innermost_ethertype_restriction.mask = RTE_BE16(0xffff);

	if (spec != NULL) {
		const struct rte_flow_item_ipv6 *item_spec;
		const struct rte_flow_item_ipv6 *item_mask;

		item_spec = (const struct rte_flow_item_ipv6 *)spec;
		item_mask = (const struct rte_flow_item_ipv6 *)mask;

		pdata->l3_next_proto_value = item_spec->hdr.proto;
		pdata->l3_next_proto_mask = item_mask->hdr.proto;
	} else {
		return 0;
	}

	rc = sfc_mae_parse_item(flocs_ipv6, RTE_DIM(flocs_ipv6), spec, mask,
				ctx_mae, error);
	if (rc != 0)
		return rc;

	memcpy(&vtc_flow_be, spec, sizeof(vtc_flow_be));
	vtc_flow = rte_be_to_cpu_32(vtc_flow_be);
	tc_value = (vtc_flow & RTE_IPV6_HDR_TC_MASK) >> RTE_IPV6_HDR_TC_SHIFT;

	memcpy(&vtc_flow_be, mask, sizeof(vtc_flow_be));
	vtc_flow = rte_be_to_cpu_32(vtc_flow_be);
	tc_mask = (vtc_flow & RTE_IPV6_HDR_TC_MASK) >> RTE_IPV6_HDR_TC_SHIFT;

	rc = efx_mae_match_spec_field_set(ctx_mae->match_spec,
					  fremap[EFX_MAE_FIELD_IP_TOS],
					  sizeof(tc_value), &tc_value,
					  sizeof(tc_mask), &tc_mask);
	if (rc != 0) {
		return rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ITEM,
				NULL, "Failed to process item fields");
	}

	return 0;
}

static const struct sfc_mae_field_locator flocs_tcp[] = {
	{
		EFX_MAE_FIELD_L4_SPORT_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_tcp, hdr.src_port),
		offsetof(struct rte_flow_item_tcp, hdr.src_port),
	},
	{
		EFX_MAE_FIELD_L4_DPORT_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_tcp, hdr.dst_port),
		offsetof(struct rte_flow_item_tcp, hdr.dst_port),
	},
	{
		EFX_MAE_FIELD_TCP_FLAGS_BE,
		/*
		 * The values have been picked intentionally since the
		 * target MAE field is oversize (16 bit). This mapping
		 * relies on the fact that the MAE field is big-endian.
		 */
		RTE_SIZEOF_FIELD(struct rte_flow_item_tcp, hdr.data_off) +
		RTE_SIZEOF_FIELD(struct rte_flow_item_tcp, hdr.tcp_flags),
		offsetof(struct rte_flow_item_tcp, hdr.data_off),
	},
};

static int
sfc_mae_rule_parse_item_tcp(const struct rte_flow_item *item,
			    struct sfc_flow_parse_ctx *ctx,
			    struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	struct sfc_mae_pattern_data *pdata = &ctx_mae->pattern_data;
	struct rte_flow_item_tcp supp_mask;
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	int rc;

	/*
	 * When encountered among outermost items, item TCP is invalid.
	 * Check which match specification is being constructed now.
	 */
	if (ctx_mae->match_spec != ctx_mae->match_spec_action) {
		return rte_flow_error_set(error, EINVAL,
					  RTE_FLOW_ERROR_TYPE_ITEM, item,
					  "TCP in outer frame is invalid");
	}

	sfc_mae_item_build_supp_mask(flocs_tcp, RTE_DIM(flocs_tcp),
				     &supp_mask, sizeof(supp_mask));

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 &rte_flow_item_tcp_mask,
				 sizeof(struct rte_flow_item_tcp), error);
	if (rc != 0)
		return rc;

	pdata->l3_next_proto_restriction_value = IPPROTO_TCP;
	pdata->l3_next_proto_restriction_mask = 0xff;

	if (spec == NULL)
		return 0;

	return sfc_mae_parse_item(flocs_tcp, RTE_DIM(flocs_tcp), spec, mask,
				  ctx_mae, error);
}

static const struct sfc_mae_field_locator flocs_udp[] = {
	{
		EFX_MAE_FIELD_L4_SPORT_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_udp, hdr.src_port),
		offsetof(struct rte_flow_item_udp, hdr.src_port),
	},
	{
		EFX_MAE_FIELD_L4_DPORT_BE,
		RTE_SIZEOF_FIELD(struct rte_flow_item_udp, hdr.dst_port),
		offsetof(struct rte_flow_item_udp, hdr.dst_port),
	},
};

static int
sfc_mae_rule_parse_item_udp(const struct rte_flow_item *item,
			    struct sfc_flow_parse_ctx *ctx,
			    struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	struct sfc_mae_pattern_data *pdata = &ctx_mae->pattern_data;
	struct rte_flow_item_udp supp_mask;
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	int rc;

	sfc_mae_item_build_supp_mask(flocs_udp, RTE_DIM(flocs_udp),
				     &supp_mask, sizeof(supp_mask));

	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 &rte_flow_item_udp_mask,
				 sizeof(struct rte_flow_item_udp), error);
	if (rc != 0)
		return rc;

	pdata->l3_next_proto_restriction_value = IPPROTO_UDP;
	pdata->l3_next_proto_restriction_mask = 0xff;

	if (spec == NULL)
		return 0;

	return sfc_mae_parse_item(flocs_udp, RTE_DIM(flocs_udp), spec, mask,
				  ctx_mae, error);
}

static const struct sfc_mae_field_locator flocs_tunnel[] = {
	{
		/*
		 * The size and offset values are relevant
		 * for Geneve and NVGRE, too.
		 */
		.size = RTE_SIZEOF_FIELD(struct rte_flow_item_vxlan, vni),
		.ofst = offsetof(struct rte_flow_item_vxlan, vni),
	},
};

/*
 * An auxiliary registry which allows using non-encap. field IDs
 * directly when building a match specification of type ACTION.
 *
 * See sfc_mae_rule_parse_pattern() and sfc_mae_rule_parse_item_tunnel().
 */
static const efx_mae_field_id_t field_ids_no_remap[] = {
#define FIELD_ID_NO_REMAP(_field) \
	[EFX_MAE_FIELD_##_field] = EFX_MAE_FIELD_##_field

	FIELD_ID_NO_REMAP(ETHER_TYPE_BE),
	FIELD_ID_NO_REMAP(ETH_SADDR_BE),
	FIELD_ID_NO_REMAP(ETH_DADDR_BE),
	FIELD_ID_NO_REMAP(VLAN0_TCI_BE),
	FIELD_ID_NO_REMAP(VLAN0_PROTO_BE),
	FIELD_ID_NO_REMAP(VLAN1_TCI_BE),
	FIELD_ID_NO_REMAP(VLAN1_PROTO_BE),
	FIELD_ID_NO_REMAP(SRC_IP4_BE),
	FIELD_ID_NO_REMAP(DST_IP4_BE),
	FIELD_ID_NO_REMAP(IP_PROTO),
	FIELD_ID_NO_REMAP(IP_TOS),
	FIELD_ID_NO_REMAP(IP_TTL),
	FIELD_ID_NO_REMAP(SRC_IP6_BE),
	FIELD_ID_NO_REMAP(DST_IP6_BE),
	FIELD_ID_NO_REMAP(L4_SPORT_BE),
	FIELD_ID_NO_REMAP(L4_DPORT_BE),
	FIELD_ID_NO_REMAP(TCP_FLAGS_BE),
	FIELD_ID_NO_REMAP(HAS_OVLAN),
	FIELD_ID_NO_REMAP(HAS_IVLAN),

#undef FIELD_ID_NO_REMAP
};

/*
 * An auxiliary registry which allows using "ENC" field IDs
 * when building a match specification of type OUTER.
 *
 * See sfc_mae_rule_encap_parse_init().
 */
static const efx_mae_field_id_t field_ids_remap_to_encap[] = {
#define FIELD_ID_REMAP_TO_ENCAP(_field) \
	[EFX_MAE_FIELD_##_field] = EFX_MAE_FIELD_ENC_##_field

	FIELD_ID_REMAP_TO_ENCAP(ETHER_TYPE_BE),
	FIELD_ID_REMAP_TO_ENCAP(ETH_SADDR_BE),
	FIELD_ID_REMAP_TO_ENCAP(ETH_DADDR_BE),
	FIELD_ID_REMAP_TO_ENCAP(VLAN0_TCI_BE),
	FIELD_ID_REMAP_TO_ENCAP(VLAN0_PROTO_BE),
	FIELD_ID_REMAP_TO_ENCAP(VLAN1_TCI_BE),
	FIELD_ID_REMAP_TO_ENCAP(VLAN1_PROTO_BE),
	FIELD_ID_REMAP_TO_ENCAP(SRC_IP4_BE),
	FIELD_ID_REMAP_TO_ENCAP(DST_IP4_BE),
	FIELD_ID_REMAP_TO_ENCAP(IP_PROTO),
	FIELD_ID_REMAP_TO_ENCAP(IP_TOS),
	FIELD_ID_REMAP_TO_ENCAP(IP_TTL),
	FIELD_ID_REMAP_TO_ENCAP(SRC_IP6_BE),
	FIELD_ID_REMAP_TO_ENCAP(DST_IP6_BE),
	FIELD_ID_REMAP_TO_ENCAP(L4_SPORT_BE),
	FIELD_ID_REMAP_TO_ENCAP(L4_DPORT_BE),
	FIELD_ID_REMAP_TO_ENCAP(HAS_OVLAN),
	FIELD_ID_REMAP_TO_ENCAP(HAS_IVLAN),

#undef FIELD_ID_REMAP_TO_ENCAP
};

static int
sfc_mae_rule_parse_item_tunnel(const struct rte_flow_item *item,
			       struct sfc_flow_parse_ctx *ctx,
			       struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
	uint8_t vnet_id_v[sizeof(uint32_t)] = {0};
	uint8_t vnet_id_m[sizeof(uint32_t)] = {0};
	const struct rte_flow_item_vxlan *vxp;
	uint8_t supp_mask[sizeof(uint64_t)];
	const uint8_t *spec = NULL;
	const uint8_t *mask = NULL;
	int rc;

	if (ctx_mae->ft_rule_type == SFC_FT_RULE_SWITCH) {
		/*
		 * As a workaround, pattern processing has started from
		 * this (tunnel) item. No pattern data to process yet.
		 */
	} else {
		/*
		 * We're about to start processing inner frame items.
		 * Process pattern data that has been deferred so far
		 * and reset pattern data storage.
		 */
		rc = sfc_mae_rule_process_pattern_data(ctx_mae, error);
		if (rc != 0)
			return rc;
	}

	memset(&ctx_mae->pattern_data, 0, sizeof(ctx_mae->pattern_data));

	sfc_mae_item_build_supp_mask(flocs_tunnel, RTE_DIM(flocs_tunnel),
				     &supp_mask, sizeof(supp_mask));

	/*
	 * This tunnel item was preliminarily detected by
	 * sfc_mae_rule_encap_parse_init(). Default mask
	 * was also picked by that helper. Use it here.
	 */
	rc = sfc_flow_parse_init(item,
				 (const void **)&spec, (const void **)&mask,
				 (const void *)&supp_mask,
				 ctx_mae->tunnel_def_mask,
				 ctx_mae->tunnel_def_mask_size,  error);
	if (rc != 0)
		return rc;

	/*
	 * This item and later ones comprise a
	 * match specification of type ACTION.
	 */
	ctx_mae->match_spec = ctx_mae->match_spec_action;

	/* This item and later ones use non-encap. EFX MAE field IDs. */
	ctx_mae->field_ids_remap = field_ids_no_remap;

	if (spec == NULL)
		return 0;

	/*
	 * Field EFX_MAE_FIELD_ENC_VNET_ID_BE is a 32-bit one.
	 * Copy 24-bit VNI, which is BE, at offset 1 in it.
	 * The extra byte is 0 both in the mask and in the value.
	 */
	vxp = (const struct rte_flow_item_vxlan *)spec;
	memcpy(vnet_id_v + 1, &vxp->vni, sizeof(vxp->vni));

	vxp = (const struct rte_flow_item_vxlan *)mask;
	memcpy(vnet_id_m + 1, &vxp->vni, sizeof(vxp->vni));

	rc = efx_mae_match_spec_field_set(ctx_mae->match_spec,
					  EFX_MAE_FIELD_ENC_VNET_ID_BE,
					  sizeof(vnet_id_v), vnet_id_v,
					  sizeof(vnet_id_m), vnet_id_m);
	if (rc != 0) {
		rc = rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ITEM,
					item, "Failed to set VXLAN VNI");
	}

	return rc;
}

static const struct sfc_flow_item sfc_flow_items[] = {
	{
		.type = RTE_FLOW_ITEM_TYPE_MARK,
		.name = "MARK",
		.prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
		.layer = SFC_FLOW_ITEM_ANY_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_mark,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_PORT_ID,
		.name = "PORT_ID",
		/*
		 * In terms of RTE flow, this item is a META one,
		 * and its position in the pattern is don't care.
		 */
		.prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
		.layer = SFC_FLOW_ITEM_ANY_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_port_id,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_PORT_REPRESENTOR,
		.name = "PORT_REPRESENTOR",
		/*
		 * In terms of RTE flow, this item is a META one,
		 * and its position in the pattern is don't care.
		 */
		.prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
		.layer = SFC_FLOW_ITEM_ANY_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_ethdev_based,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_REPRESENTED_PORT,
		.name = "REPRESENTED_PORT",
		/*
		 * In terms of RTE flow, this item is a META one,
		 * and its position in the pattern is don't care.
		 */
		.prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
		.layer = SFC_FLOW_ITEM_ANY_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_ethdev_based,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_ETH,
		.name = "ETH",
		.prev_layer = SFC_FLOW_ITEM_START_LAYER,
		.layer = SFC_FLOW_ITEM_L2,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_eth,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_VLAN,
		.name = "VLAN",
		.prev_layer = SFC_FLOW_ITEM_L2,
		.layer = SFC_FLOW_ITEM_L2,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_vlan,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_IPV4,
		.name = "IPV4",
		.prev_layer = SFC_FLOW_ITEM_L2,
		.layer = SFC_FLOW_ITEM_L3,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_ipv4,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_IPV6,
		.name = "IPV6",
		.prev_layer = SFC_FLOW_ITEM_L2,
		.layer = SFC_FLOW_ITEM_L3,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_ipv6,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_TCP,
		.name = "TCP",
		.prev_layer = SFC_FLOW_ITEM_L3,
		.layer = SFC_FLOW_ITEM_L4,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_tcp,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_UDP,
		.name = "UDP",
		.prev_layer = SFC_FLOW_ITEM_L3,
		.layer = SFC_FLOW_ITEM_L4,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_udp,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_VXLAN,
		.name = "VXLAN",
		.prev_layer = SFC_FLOW_ITEM_L4,
		.layer = SFC_FLOW_ITEM_START_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_tunnel,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_GENEVE,
		.name = "GENEVE",
		.prev_layer = SFC_FLOW_ITEM_L4,
		.layer = SFC_FLOW_ITEM_START_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_tunnel,
	},
	{
		.type = RTE_FLOW_ITEM_TYPE_NVGRE,
		.name = "NVGRE",
		.prev_layer = SFC_FLOW_ITEM_L3,
		.layer = SFC_FLOW_ITEM_START_LAYER,
		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
		.parse = sfc_mae_rule_parse_item_tunnel,
	},
};

static int
sfc_mae_rule_process_outer(struct sfc_adapter *sa,
			   struct sfc_mae_parse_ctx *ctx,
			   struct sfc_mae_outer_rule **rulep,
			   struct rte_flow_error *error)
{
	efx_mae_rule_id_t invalid_rule_id = { .id = EFX_MAE_RSRC_ID_INVALID };
	int rc;

	if (ctx->encap_type == EFX_TUNNEL_PROTOCOL_NONE) {
		*rulep = NULL;
		goto no_or_id;
	}

	SFC_ASSERT(ctx->match_spec_outer != NULL);

	if (!efx_mae_match_spec_is_valid(sa->nic, ctx->match_spec_outer)) {
		return rte_flow_error_set(error, ENOTSUP,
					  RTE_FLOW_ERROR_TYPE_ITEM, NULL,
					  "Inconsistent pattern (outer)");
	}

	*rulep = sfc_mae_outer_rule_attach(sa, ctx->match_spec_outer,
					   ctx->encap_type);
	if (*rulep != NULL) {
		efx_mae_match_spec_fini(sa->nic, ctx->match_spec_outer);
	} else {
		rc = sfc_mae_outer_rule_add(sa, ctx->match_spec_outer,
					    ctx->encap_type, rulep);
		if (rc != 0) {
			return rte_flow_error_set(error, rc,
					RTE_FLOW_ERROR_TYPE_ITEM, NULL,
					"Failed to process the pattern");
		}
	}

	/* The spec has now been tracked by the outer rule entry. */
	ctx->match_spec_outer = NULL;

no_or_id:
	switch (ctx->ft_rule_type) {
	case SFC_FT_RULE_NONE:
		break;
	case SFC_FT_RULE_TUNNEL:
		/* No action rule */
		return 0;
	case SFC_FT_RULE_SWITCH:
		/*
		 * Match on recirculation ID rather than
		 * on the outer rule allocation handle.
		 */
		rc = efx_mae_match_spec_recirc_id_set(ctx->match_spec_action,
				SFC_FT_CTX_ID_TO_CTX_MARK(ctx->ft_ctx->id));
		if (rc != 0) {
			return rte_flow_error_set(error, rc,
					RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
					"FT: SWITCH: AR: failed to request match on RECIRC_ID");
		}
		return 0;
	default:
		SFC_ASSERT(B_FALSE);
	}

	/*
	 * In MAE, lookup sequence comprises outer parse, outer rule lookup,
	 * inner parse (when some outer rule is hit) and action rule lookup.
	 * If the currently processed flow does not come with an outer rule,
	 * its action rule must be available only for packets which miss in
	 * outer rule table. Set OR_ID match field to 0xffffffff/0xffffffff
	 * in the action rule specification; this ensures correct behaviour.
	 *
	 * If, on the other hand, this flow does have an outer rule, its ID
	 * may be unknown at the moment (not yet allocated), but OR_ID mask
	 * has to be set to 0xffffffff anyway for correct class comparisons.
	 * When the outer rule has been allocated, this match field will be
	 * overridden by sfc_mae_outer_rule_enable() to use the right value.
	 */
	rc = efx_mae_match_spec_outer_rule_id_set(ctx->match_spec_action,
						  &invalid_rule_id);
	if (rc != 0) {
		if (*rulep != NULL)
			sfc_mae_outer_rule_del(sa, *rulep);

		*rulep = NULL;

		return rte_flow_error_set(error, rc,
					  RTE_FLOW_ERROR_TYPE_ITEM, NULL,
					  "Failed to process the pattern");
	}

	return 0;
}

static int
sfc_mae_rule_preparse_item_mark(const struct rte_flow_item_mark *spec,
				struct sfc_mae_parse_ctx *ctx)
{
	struct sfc_ft_ctx *ft_ctx;
	uint32_t user_mark;

	if (spec == NULL) {
		sfc_err(ctx->sa, "FT: SWITCH: NULL spec in item MARK");
		return EINVAL;
	}

	ft_ctx = sfc_ft_ctx_pick(ctx->sa, spec->id);
	if (ft_ctx == NULL) {
		sfc_err(ctx->sa, "FT: SWITCH: invalid context");
		return EINVAL;
	}

	if (ft_ctx->refcnt == 0) {
		sfc_err(ctx->sa, "FT: SWITCH: inactive context (ID=%u)",
			ft_ctx->id);
		return ENOENT;
	}

	user_mark = SFC_FT_FLOW_MARK_TO_USER_MARK(spec->id);
	if (user_mark != 0) {
		sfc_err(ctx->sa, "FT: SWITCH: invalid item MARK");
		return EINVAL;
	}

	sfc_dbg(ctx->sa, "FT: SWITCH: detected");

	ctx->ft_rule_type = SFC_FT_RULE_SWITCH;
	ctx->ft_ctx = ft_ctx;

	return 0;
}

static int
sfc_mae_rule_encap_parse_init(struct sfc_adapter *sa,
			      struct sfc_mae_parse_ctx *ctx,
			      struct rte_flow_error *error)
{
	const struct rte_flow_item *pattern = ctx->pattern;
	struct sfc_mae *mae = &sa->mae;
	uint8_t recirc_id = 0;
	int rc;

	if (pattern == NULL) {
		rte_flow_error_set(error, EINVAL,
				   RTE_FLOW_ERROR_TYPE_ITEM_NUM, NULL,
				   "NULL pattern");
		return -rte_errno;
	}

	for (;;) {
		switch (pattern->type) {
		case RTE_FLOW_ITEM_TYPE_MARK:
			rc = sfc_mae_rule_preparse_item_mark(pattern->spec,
							     ctx);
			if (rc != 0) {
				return rte_flow_error_set(error, rc,
						  RTE_FLOW_ERROR_TYPE_ITEM,
						  pattern, "FT: SWITCH: invalid item MARK");
			}
			++pattern;
			continue;
		case RTE_FLOW_ITEM_TYPE_VXLAN:
			ctx->encap_type = EFX_TUNNEL_PROTOCOL_VXLAN;
			ctx->tunnel_def_mask = &rte_flow_item_vxlan_mask;
			ctx->tunnel_def_mask_size =
				sizeof(rte_flow_item_vxlan_mask);
			break;
		case RTE_FLOW_ITEM_TYPE_GENEVE:
			ctx->encap_type = EFX_TUNNEL_PROTOCOL_GENEVE;
			ctx->tunnel_def_mask = &rte_flow_item_geneve_mask;
			ctx->tunnel_def_mask_size =
				sizeof(rte_flow_item_geneve_mask);
			break;
		case RTE_FLOW_ITEM_TYPE_NVGRE:
			ctx->encap_type = EFX_TUNNEL_PROTOCOL_NVGRE;
			ctx->tunnel_def_mask = &rte_flow_item_nvgre_mask;
			ctx->tunnel_def_mask_size =
				sizeof(rte_flow_item_nvgre_mask);
			break;
		case RTE_FLOW_ITEM_TYPE_END:
			break;
		default:
			++pattern;
			continue;
		};

		break;
	}

	switch (ctx->ft_rule_type) {
	case SFC_FT_RULE_NONE:
		if (pattern->type == RTE_FLOW_ITEM_TYPE_END)
			return 0;
		break;
	case SFC_FT_RULE_TUNNEL:
		if (pattern->type != RTE_FLOW_ITEM_TYPE_END) {
			return rte_flow_error_set(error, ENOTSUP,
						  RTE_FLOW_ERROR_TYPE_ITEM,
						  pattern, "FT: TUNNEL: invalid item");
		}
		ctx->encap_type = ctx->ft_ctx->encap_type;
		break;
	case SFC_FT_RULE_SWITCH:
		if (pattern->type == RTE_FLOW_ITEM_TYPE_END) {
			return rte_flow_error_set(error, EINVAL,
						  RTE_FLOW_ERROR_TYPE_ITEM,
						  NULL, "FT: SWITCH: missing tunnel item");
		} else if (ctx->encap_type != ctx->ft_ctx->encap_type) {
			return rte_flow_error_set(error, EINVAL,
						  RTE_FLOW_ERROR_TYPE_ITEM,
						  pattern, "FT: SWITCH: tunnel type mismatch");
		}

		/*
		 * The HW/FW hasn't got support for the use of "ENC" fields in
		 * action rules (except the VNET_ID one) yet. As a workaround,
		 * start parsing the pattern from the tunnel item.
		 */
		ctx->pattern = pattern;
		break;
	default:
		SFC_ASSERT(B_FALSE);
		break;
	}

	if ((mae->encap_types_supported & (1U << ctx->encap_type)) == 0) {
		return rte_flow_error_set(error, ENOTSUP,
					  RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
					  "OR: unsupported tunnel type");
	}

	switch (ctx->ft_rule_type) {
	case SFC_FT_RULE_TUNNEL:
		recirc_id = SFC_FT_CTX_ID_TO_CTX_MARK(ctx->ft_ctx->id);
		/* FALLTHROUGH */
	case SFC_FT_RULE_NONE:
		if (ctx->priority >= mae->nb_outer_rule_prios_max) {
			return rte_flow_error_set(error, ENOTSUP,
					RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
					NULL, "OR: unsupported priority level");
		}

		rc = efx_mae_match_spec_init(sa->nic,
					     EFX_MAE_RULE_OUTER, ctx->priority,
					     &ctx->match_spec_outer);
		if (rc != 0) {
			return rte_flow_error_set(error, rc,
				RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
				"OR: failed to initialise the match specification");
		}

		/*
		 * Outermost items comprise a match
		 * specification of type OUTER.
		 */
		ctx->match_spec = ctx->match_spec_outer;

		/* Outermost items use "ENC" EFX MAE field IDs. */
		ctx->field_ids_remap = field_ids_remap_to_encap;

		rc = efx_mae_outer_rule_recirc_id_set(ctx->match_spec,
						      recirc_id);
		if (rc != 0) {
			return rte_flow_error_set(error, rc,
					RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
					"OR: failed to initialise RECIRC_ID");
		}
		break;
	case SFC_FT_RULE_SWITCH:
		/* Outermost items -> "ENC" match fields in the action rule. */
		ctx->field_ids_remap = field_ids_remap_to_encap;
		ctx->match_spec = ctx->match_spec_action;

		/* No own outer rule; match on TUNNEL OR's RECIRC_ID is used. */
		ctx->encap_type = EFX_TUNNEL_PROTOCOL_NONE;
		break;
	default:
		SFC_ASSERT(B_FALSE);
		break;
	}

	return 0;
}

static void
sfc_mae_rule_encap_parse_fini(struct sfc_adapter *sa,
			      struct sfc_mae_parse_ctx *ctx)
{
	if (ctx->encap_type == EFX_TUNNEL_PROTOCOL_NONE)
		return;

	if (ctx->match_spec_outer != NULL)
		efx_mae_match_spec_fini(sa->nic, ctx->match_spec_outer);
}

int
sfc_mae_rule_parse_pattern(struct sfc_adapter *sa,
			   const struct rte_flow_item pattern[],
			   struct sfc_flow_spec_mae *spec,
			   struct rte_flow_error *error)
{
	struct sfc_mae_parse_ctx ctx_mae;
	unsigned int priority_shift = 0;
	struct sfc_flow_parse_ctx ctx;
	int rc;

	memset(&ctx_mae, 0, sizeof(ctx_mae));
	ctx_mae.ft_rule_type = spec->ft_rule_type;
	ctx_mae.priority = spec->priority;
	ctx_mae.ft_ctx = spec->ft_ctx;
	ctx_mae.sa = sa;

	switch (ctx_mae.ft_rule_type) {
	case SFC_FT_RULE_TUNNEL:
		/*
		 * By design, this flow should be represented solely by the
		 * outer rule. But the HW/FW hasn't got support for setting
		 * Rx mark from RECIRC_ID on outer rule lookup yet. Neither
		 * does it support outer rule counters. As a workaround, an
		 * action rule of lower priority is used to do the job.
		 */
		priority_shift = 1;

		/* FALLTHROUGH */
	case SFC_FT_RULE_SWITCH:
		if (ctx_mae.priority != 0) {
			/*
			 * Because of the above workaround, deny the use
			 * of priorities to TUNNEL and SWITCH rules.
			 */
			rc = rte_flow_error_set(error, ENOTSUP,
				RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, NULL,
				"FT: priorities are not supported");
			goto fail_priority_check;
		}

		/* FALLTHROUGH */
	case SFC_FT_RULE_NONE:
		rc = efx_mae_match_spec_init(sa->nic, EFX_MAE_RULE_ACTION,
					     spec->priority + priority_shift,
					     &ctx_mae.match_spec_action);
		if (rc != 0) {
			rc = rte_flow_error_set(error, rc,
				RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
				"AR: failed to initialise the match specification");
			goto fail_init_match_spec_action;
		}
		break;
	default:
		SFC_ASSERT(B_FALSE);
		break;
	}

	/*
	 * As a preliminary setting, assume that there is no encapsulation
	 * in the pattern. That is, pattern items are about to comprise a
	 * match specification of type ACTION and use non-encap. field IDs.
	 *
	 * sfc_mae_rule_encap_parse_init() below may override this.
	 */
	ctx_mae.encap_type = EFX_TUNNEL_PROTOCOL_NONE;
	ctx_mae.match_spec = ctx_mae.match_spec_action;
	ctx_mae.field_ids_remap = field_ids_no_remap;
	ctx_mae.pattern = pattern;

	ctx.type = SFC_FLOW_PARSE_CTX_MAE;
	ctx.mae = &ctx_mae;

	rc = sfc_mae_rule_encap_parse_init(sa, &ctx_mae, error);
	if (rc != 0)
		goto fail_encap_parse_init;

	/*
	 * sfc_mae_rule_encap_parse_init() may have detected tunnel offload
	 * SWITCH rule. Remember its properties for later use.
	 */
	spec->ft_rule_type = ctx_mae.ft_rule_type;
	spec->ft_ctx = ctx_mae.ft_ctx;

	rc = sfc_flow_parse_pattern(sa, sfc_flow_items, RTE_DIM(sfc_flow_items),
				    ctx_mae.pattern, &ctx, error);
	if (rc != 0)
		goto fail_parse_pattern;

	rc = sfc_mae_rule_process_pattern_data(&ctx_mae, error);
	if (rc != 0)
		goto fail_process_pattern_data;

	rc = sfc_mae_rule_process_outer(sa, &ctx_mae, &spec->outer_rule, error);
	if (rc != 0)
		goto fail_process_outer;

	if (ctx_mae.match_spec_action != NULL &&
	    !efx_mae_match_spec_is_valid(sa->nic, ctx_mae.match_spec_action)) {
		rc = rte_flow_error_set(error, ENOTSUP,
					RTE_FLOW_ERROR_TYPE_ITEM, NULL,
					"Inconsistent pattern");
		goto fail_validate_match_spec_action;
	}

	spec->match_spec = ctx_mae.match_spec_action;

	return 0;

fail_validate_match_spec_action:
fail_process_outer:
fail_process_pattern_data:
fail_parse_pattern:
	sfc_mae_rule_encap_parse_fini(sa, &ctx_mae);

fail_encap_parse_init:
	if (ctx_mae.match_spec_action != NULL)
		efx_mae_match_spec_fini(sa->nic, ctx_mae.match_spec_action);

fail_init_match_spec_action:
fail_priority_check:
	return rc;
}

static int
sfc_mae_rule_parse_action_set_mac(struct sfc_adapter *sa,
				  enum sfc_mae_mac_addr_type type,
				  const struct rte_flow_action_set_mac *conf,
				  struct sfc_mae_aset_ctx *ctx,
				  struct rte_flow_error *error)
{
	struct sfc_mae_mac_addr **mac_addrp;
	int rc;

	if (conf == NULL) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
				"the MAC address entry definition is NULL");
	}

	switch (type) {
	case SFC_MAE_MAC_ADDR_DST:
		rc = efx_mae_action_set_populate_set_dst_mac(ctx->spec);
		mac_addrp = &ctx->dst_mac;
		break;
	case SFC_MAE_MAC_ADDR_SRC:
		rc = efx_mae_action_set_populate_set_src_mac(ctx->spec);
		mac_addrp = &ctx->src_mac;
		break;
	default:
		rc = EINVAL;
		break;
	}

	if (rc != 0)
		goto error;

	*mac_addrp = sfc_mae_mac_addr_attach(sa, conf->mac_addr);
	if (*mac_addrp != NULL)
		return 0;

	rc = sfc_mae_mac_addr_add(sa, conf->mac_addr, mac_addrp);
	if (rc != 0)
		goto error;

	return 0;

error:
	return rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ACTION,
				  NULL, "failed to request set MAC action");
}

/*
 * An action supported by MAE may correspond to a bundle of RTE flow actions,
 * in example, VLAN_PUSH = OF_PUSH_VLAN + OF_VLAN_SET_VID + OF_VLAN_SET_PCP.
 * That is, related RTE flow actions need to be tracked as parts of a whole
 * so that they can be combined into a single action and submitted to MAE
 * representation of a given rule's action set.
 *
 * Each RTE flow action provided by an application gets classified as
 * one belonging to some bundle type. If an action is not supposed to
 * belong to any bundle, or if this action is END, it is described as
 * one belonging to a dummy bundle of type EMPTY.
 *
 * A currently tracked bundle will be submitted if a repeating
 * action or an action of different bundle type follows.
 */

enum sfc_mae_actions_bundle_type {
	SFC_MAE_ACTIONS_BUNDLE_EMPTY = 0,
	SFC_MAE_ACTIONS_BUNDLE_VLAN_PUSH,
};

struct sfc_mae_actions_bundle {
	enum sfc_mae_actions_bundle_type	type;

	/* Indicates actions already tracked by the current bundle */
	uint64_t				actions_mask;

	/* Parameters used by SFC_MAE_ACTIONS_BUNDLE_VLAN_PUSH */
	rte_be16_t				vlan_push_tpid;
	rte_be16_t				vlan_push_tci;
};

/*
 * Combine configuration of RTE flow actions tracked by the bundle into a
 * single action and submit the result to MAE action set specification.
 * Do nothing in the case of dummy action bundle.
 */
static int
sfc_mae_actions_bundle_submit(const struct sfc_mae_actions_bundle *bundle,
			      efx_mae_actions_t *spec)
{
	int rc = 0;

	switch (bundle->type) {
	case SFC_MAE_ACTIONS_BUNDLE_EMPTY:
		break;
	case SFC_MAE_ACTIONS_BUNDLE_VLAN_PUSH:
		rc = efx_mae_action_set_populate_vlan_push(
			spec, bundle->vlan_push_tpid, bundle->vlan_push_tci);
		break;
	default:
		SFC_ASSERT(B_FALSE);
		break;
	}

	return rc;
}

/*
 * Given the type of the next RTE flow action in the line, decide
 * whether a new bundle is about to start, and, if this is the case,
 * submit and reset the current bundle.
 */
static int
sfc_mae_actions_bundle_sync(const struct rte_flow_action *action,
			    struct sfc_mae_actions_bundle *bundle,
			    efx_mae_actions_t *spec,
			    struct rte_flow_error *error)
{
	enum sfc_mae_actions_bundle_type bundle_type_new;
	int rc;

	switch (action->type) {
	case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
	case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
	case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP:
		bundle_type_new = SFC_MAE_ACTIONS_BUNDLE_VLAN_PUSH;
		break;
	default:
		/*
		 * Self-sufficient actions, including END, are handled in this
		 * case. No checks for unsupported actions are needed here
		 * because parsing doesn't occur at this point.
		 */
		bundle_type_new = SFC_MAE_ACTIONS_BUNDLE_EMPTY;
		break;
	}

	if (bundle_type_new != bundle->type ||
	    (bundle->actions_mask & (1ULL << action->type)) != 0) {
		rc = sfc_mae_actions_bundle_submit(bundle, spec);
		if (rc != 0)
			goto fail_submit;

		memset(bundle, 0, sizeof(*bundle));
	}

	bundle->type = bundle_type_new;

	return 0;

fail_submit:
	return rte_flow_error_set(error, rc,
			RTE_FLOW_ERROR_TYPE_ACTION, NULL,
			"Failed to request the (group of) action(s)");
}

static void
sfc_mae_rule_parse_action_of_push_vlan(
			    const struct rte_flow_action_of_push_vlan *conf,
			    struct sfc_mae_actions_bundle *bundle)
{
	bundle->vlan_push_tpid = conf->ethertype;
}

static void
sfc_mae_rule_parse_action_of_set_vlan_vid(
			    const struct rte_flow_action_of_set_vlan_vid *conf,
			    struct sfc_mae_actions_bundle *bundle)
{
	bundle->vlan_push_tci |= (conf->vlan_vid &
				  rte_cpu_to_be_16(RTE_LEN2MASK(12, uint16_t)));
}

static void
sfc_mae_rule_parse_action_of_set_vlan_pcp(
			    const struct rte_flow_action_of_set_vlan_pcp *conf,
			    struct sfc_mae_actions_bundle *bundle)
{
	uint16_t vlan_tci_pcp = (uint16_t)(conf->vlan_pcp &
					   RTE_LEN2MASK(3, uint8_t)) << 13;

	bundle->vlan_push_tci |= rte_cpu_to_be_16(vlan_tci_pcp);
}

struct sfc_mae_parsed_item {
	const struct rte_flow_item	*item;
	size_t				proto_header_ofst;
	size_t				proto_header_size;
};

/*
 * For each 16-bit word of the given header, override
 * bits enforced by the corresponding 16-bit mask.
 */
static void
sfc_mae_header_force_item_masks(uint8_t *header_buf,
				const struct sfc_mae_parsed_item *parsed_items,
				unsigned int nb_parsed_items)
{
	unsigned int item_idx;

	for (item_idx = 0; item_idx < nb_parsed_items; ++item_idx) {
		const struct sfc_mae_parsed_item *parsed_item;
		const struct rte_flow_item *item;
		size_t proto_header_size;
		size_t ofst;

		parsed_item = &parsed_items[item_idx];
		proto_header_size = parsed_item->proto_header_size;
		item = parsed_item->item;

		for (ofst = 0; ofst < proto_header_size;
		     ofst += sizeof(rte_be16_t)) {
			rte_be16_t *wp = RTE_PTR_ADD(header_buf, ofst);
			const rte_be16_t *w_maskp;
			const rte_be16_t *w_specp;

			w_maskp = RTE_PTR_ADD(item->mask, ofst);
			w_specp = RTE_PTR_ADD(item->spec, ofst);

			*wp &= ~(*w_maskp);
			*wp |= (*w_specp & *w_maskp);
		}

		header_buf += proto_header_size;
	}
}

#define SFC_IPV4_TTL_DEF	0x40
#define SFC_IPV6_VTC_FLOW_DEF	0x60000000
#define SFC_IPV6_HOP_LIMITS_DEF	0xff
#define SFC_VXLAN_FLAGS_DEF	0x08000000

static int
sfc_mae_rule_parse_action_vxlan_encap(
			    struct sfc_mae *mae,
			    const struct rte_flow_action_vxlan_encap *conf,
			    efx_mae_actions_t *spec,
			    struct rte_flow_error *error)
{
	struct sfc_mae_bounce_eh *bounce_eh = &mae->bounce_eh;
	struct rte_flow_item *pattern = conf->definition;
	uint8_t *buf = bounce_eh->buf;

	/* This array will keep track of non-VOID pattern items. */
	struct sfc_mae_parsed_item parsed_items[1 /* Ethernet */ +
						2 /* VLAN tags */ +
						1 /* IPv4 or IPv6 */ +
						1 /* UDP */ +
						1 /* VXLAN */];
	unsigned int nb_parsed_items = 0;

	size_t eth_ethertype_ofst = offsetof(struct rte_ether_hdr, ether_type);
	uint8_t dummy_buf[RTE_MAX(sizeof(struct rte_ipv4_hdr),
				  sizeof(struct rte_ipv6_hdr))];
	struct rte_ipv4_hdr *ipv4 = (void *)dummy_buf;
	struct rte_ipv6_hdr *ipv6 = (void *)dummy_buf;
	struct rte_vxlan_hdr *vxlan = NULL;
	struct rte_udp_hdr *udp = NULL;
	unsigned int nb_vlan_tags = 0;
	size_t next_proto_ofst = 0;
	size_t ethertype_ofst = 0;
	uint64_t exp_items;
	int rc;

	if (pattern == NULL) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
				"The encap. header definition is NULL");
	}

	bounce_eh->type = EFX_TUNNEL_PROTOCOL_VXLAN;
	bounce_eh->size = 0;

	/*
	 * Process pattern items and remember non-VOID ones.
	 * Defer applying masks until after the complete header
	 * has been built from the pattern items.
	 */
	exp_items = RTE_BIT64(RTE_FLOW_ITEM_TYPE_ETH);

	for (; pattern->type != RTE_FLOW_ITEM_TYPE_END; ++pattern) {
		struct sfc_mae_parsed_item *parsed_item;
		const uint64_t exp_items_extra_vlan[] = {
			RTE_BIT64(RTE_FLOW_ITEM_TYPE_VLAN), 0
		};
		size_t proto_header_size;
		rte_be16_t *ethertypep;
		uint8_t *next_protop;
		uint8_t *buf_cur;

		if (pattern->spec == NULL) {
			return rte_flow_error_set(error, EINVAL,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"NULL item spec in the encap. header");
		}

		if (pattern->mask == NULL) {
			return rte_flow_error_set(error, EINVAL,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"NULL item mask in the encap. header");
		}

		if (pattern->last != NULL) {
			/* This is not a match pattern, so disallow range. */
			return rte_flow_error_set(error, EINVAL,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"Range item in the encap. header");
		}

		if (pattern->type == RTE_FLOW_ITEM_TYPE_VOID) {
			/* Handle VOID separately, for clarity. */
			continue;
		}

		if ((exp_items & RTE_BIT64(pattern->type)) == 0) {
			return rte_flow_error_set(error, ENOTSUP,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"Unexpected item in the encap. header");
		}

		parsed_item = &parsed_items[nb_parsed_items];
		buf_cur = buf + bounce_eh->size;

		switch (pattern->type) {
		case RTE_FLOW_ITEM_TYPE_ETH:
			SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ITEM_TYPE_ETH,
					       exp_items);
			RTE_BUILD_BUG_ON(offsetof(struct rte_flow_item_eth,
						  hdr) != 0);

			proto_header_size = sizeof(struct rte_ether_hdr);

			ethertype_ofst = eth_ethertype_ofst;

			exp_items = RTE_BIT64(RTE_FLOW_ITEM_TYPE_VLAN) |
				    RTE_BIT64(RTE_FLOW_ITEM_TYPE_IPV4) |
				    RTE_BIT64(RTE_FLOW_ITEM_TYPE_IPV6);
			break;
		case RTE_FLOW_ITEM_TYPE_VLAN:
			SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ITEM_TYPE_VLAN,
					       exp_items);
			RTE_BUILD_BUG_ON(offsetof(struct rte_flow_item_vlan,
						  hdr) != 0);

			proto_header_size = sizeof(struct rte_vlan_hdr);

			ethertypep = RTE_PTR_ADD(buf, eth_ethertype_ofst);
			*ethertypep = RTE_BE16(RTE_ETHER_TYPE_QINQ);

			ethertypep = RTE_PTR_ADD(buf, ethertype_ofst);
			*ethertypep = RTE_BE16(RTE_ETHER_TYPE_VLAN);

			ethertype_ofst =
			    bounce_eh->size +
			    offsetof(struct rte_vlan_hdr, eth_proto);

			exp_items = RTE_BIT64(RTE_FLOW_ITEM_TYPE_IPV4) |
				    RTE_BIT64(RTE_FLOW_ITEM_TYPE_IPV6);
			exp_items |= exp_items_extra_vlan[nb_vlan_tags];

			++nb_vlan_tags;
			break;
		case RTE_FLOW_ITEM_TYPE_IPV4:
			SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ITEM_TYPE_IPV4,
					       exp_items);
			RTE_BUILD_BUG_ON(offsetof(struct rte_flow_item_ipv4,
						  hdr) != 0);

			proto_header_size = sizeof(struct rte_ipv4_hdr);

			ethertypep = RTE_PTR_ADD(buf, ethertype_ofst);
			*ethertypep = RTE_BE16(RTE_ETHER_TYPE_IPV4);

			next_proto_ofst =
			    bounce_eh->size +
			    offsetof(struct rte_ipv4_hdr, next_proto_id);

			ipv4 = (struct rte_ipv4_hdr *)buf_cur;

			exp_items = RTE_BIT64(RTE_FLOW_ITEM_TYPE_UDP);
			break;
		case RTE_FLOW_ITEM_TYPE_IPV6:
			SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ITEM_TYPE_IPV6,
					       exp_items);
			RTE_BUILD_BUG_ON(offsetof(struct rte_flow_item_ipv6,
						  hdr) != 0);

			proto_header_size = sizeof(struct rte_ipv6_hdr);

			ethertypep = RTE_PTR_ADD(buf, ethertype_ofst);
			*ethertypep = RTE_BE16(RTE_ETHER_TYPE_IPV6);

			next_proto_ofst = bounce_eh->size +
					  offsetof(struct rte_ipv6_hdr, proto);

			ipv6 = (struct rte_ipv6_hdr *)buf_cur;

			exp_items = RTE_BIT64(RTE_FLOW_ITEM_TYPE_UDP);
			break;
		case RTE_FLOW_ITEM_TYPE_UDP:
			SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ITEM_TYPE_UDP,
					       exp_items);
			RTE_BUILD_BUG_ON(offsetof(struct rte_flow_item_udp,
						  hdr) != 0);

			proto_header_size = sizeof(struct rte_udp_hdr);

			next_protop = RTE_PTR_ADD(buf, next_proto_ofst);
			*next_protop = IPPROTO_UDP;

			udp = (struct rte_udp_hdr *)buf_cur;

			exp_items = RTE_BIT64(RTE_FLOW_ITEM_TYPE_VXLAN);
			break;
		case RTE_FLOW_ITEM_TYPE_VXLAN:
			SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ITEM_TYPE_VXLAN,
					       exp_items);
			RTE_BUILD_BUG_ON(offsetof(struct rte_flow_item_vxlan,
						  hdr) != 0);

			proto_header_size = sizeof(struct rte_vxlan_hdr);

			vxlan = (struct rte_vxlan_hdr *)buf_cur;

			udp->dst_port = RTE_BE16(RTE_VXLAN_DEFAULT_PORT);
			udp->dgram_len = RTE_BE16(sizeof(*udp) +
						  sizeof(*vxlan));
			udp->dgram_cksum = 0;

			exp_items = 0;
			break;
		default:
			return rte_flow_error_set(error, ENOTSUP,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"Unknown item in the encap. header");
		}

		if (bounce_eh->size + proto_header_size > bounce_eh->buf_size) {
			return rte_flow_error_set(error, E2BIG,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"The encap. header is too big");
		}

		if ((proto_header_size & 1) != 0) {
			return rte_flow_error_set(error, EINVAL,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"Odd layer size in the encap. header");
		}

		rte_memcpy(buf_cur, pattern->spec, proto_header_size);
		bounce_eh->size += proto_header_size;

		parsed_item->item = pattern;
		parsed_item->proto_header_size = proto_header_size;
		++nb_parsed_items;
	}

	if (exp_items != 0) {
		/* Parsing item VXLAN would have reset exp_items to 0. */
		return rte_flow_error_set(error, ENOTSUP,
					RTE_FLOW_ERROR_TYPE_ACTION_CONF, NULL,
					"No item VXLAN in the encap. header");
	}

	/* One of the pointers (ipv4, ipv6) refers to a dummy area. */
	ipv4->version_ihl = RTE_IPV4_VHL_DEF;
	ipv4->time_to_live = SFC_IPV4_TTL_DEF;
	ipv4->total_length = RTE_BE16(sizeof(*ipv4) + sizeof(*udp) +
				      sizeof(*vxlan));
	/* The HW cannot compute this checksum. */
	ipv4->hdr_checksum = 0;
	ipv4->hdr_checksum = rte_ipv4_cksum(ipv4);

	ipv6->vtc_flow = RTE_BE32(SFC_IPV6_VTC_FLOW_DEF);
	ipv6->hop_limits = SFC_IPV6_HOP_LIMITS_DEF;
	ipv6->payload_len = udp->dgram_len;

	vxlan->vx_flags = RTE_BE32(SFC_VXLAN_FLAGS_DEF);

	/* Take care of the masks. */
	sfc_mae_header_force_item_masks(buf, parsed_items, nb_parsed_items);

	rc = efx_mae_action_set_populate_encap(spec);
	if (rc != 0) {
		rc = rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ACTION,
				NULL, "failed to request action ENCAP");
	}

	return rc;
}

static int
sfc_mae_rule_parse_action_mark(struct sfc_adapter *sa,
			       const struct rte_flow_action_mark *conf,
			       const struct sfc_flow_spec_mae *spec_mae,
			       efx_mae_actions_t *spec)
{
	int rc;

	if (spec_mae->ft_rule_type == SFC_FT_RULE_TUNNEL) {
		/* Workaround. See sfc_flow_parse_rte_to_mae() */
	} else if (conf->id > SFC_FT_USER_MARK_MASK) {
		sfc_err(sa, "the mark value is too large");
		return EINVAL;
	}

	rc = efx_mae_action_set_populate_mark(spec, conf->id);
	if (rc != 0)
		sfc_err(sa, "failed to request action MARK: %s", strerror(rc));

	return rc;
}

static int
sfc_mae_rule_parse_action_count(struct sfc_adapter *sa,
				const struct rte_flow_action_count *conf
					__rte_unused,
				efx_mae_actions_t *spec)
{
	int rc;

	if ((sa->counter_rxq.state & SFC_COUNTER_RXQ_INITIALIZED) == 0) {
		sfc_err(sa,
			"counter queue is not configured for COUNT action");
		rc = EINVAL;
		goto fail_counter_queue_uninit;
	}

	if (sfc_get_service_lcore(SOCKET_ID_ANY) == RTE_MAX_LCORE) {
		rc = EINVAL;
		goto fail_no_service_core;
	}

	rc = efx_mae_action_set_populate_count(spec);
	if (rc != 0) {
		sfc_err(sa,
			"failed to populate counters in MAE action set: %s",
			rte_strerror(rc));
		goto fail_populate_count;
	}

	return 0;

fail_populate_count:
fail_no_service_core:
fail_counter_queue_uninit:

	return rc;
}

static int
sfc_mae_rule_parse_action_pf_vf(struct sfc_adapter *sa,
				const struct rte_flow_action_vf *vf_conf,
				efx_mae_actions_t *spec)
{
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	efx_mport_sel_t mport;
	uint32_t vf;
	int rc;

	if (vf_conf == NULL)
		vf = EFX_PCI_VF_INVALID;
	else if (vf_conf->original != 0)
		vf = encp->enc_vf;
	else
		vf = vf_conf->id;

	rc = efx_mae_mport_by_pcie_function(encp->enc_pf, vf, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to convert PF %u VF %d to m-port: %s",
			encp->enc_pf, (vf != EFX_PCI_VF_INVALID) ? (int)vf : -1,
			strerror(rc));
		return rc;
	}

	rc = efx_mae_action_set_populate_deliver(spec, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to request action DELIVER with m-port selector 0x%08x: %s",
			mport.sel, strerror(rc));
	}

	return rc;
}

static int
sfc_mae_rule_parse_action_port_id(struct sfc_adapter *sa,
				  const struct rte_flow_action_port_id *conf,
				  efx_mae_actions_t *spec)
{
	struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
	struct sfc_mae *mae = &sa->mae;
	efx_mport_sel_t mport;
	uint16_t port_id;
	int rc;

	if (conf->id > UINT16_MAX)
		return EOVERFLOW;

	port_id = (conf->original != 0) ? sas->port_id : conf->id;

	rc = sfc_mae_switch_get_ethdev_mport(mae->switch_domain_id,
					     port_id, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to get m-port for the given ethdev (port_id=%u): %s",
			port_id, strerror(rc));
		return rc;
	}

	rc = efx_mae_action_set_populate_deliver(spec, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to request action DELIVER with m-port selector 0x%08x: %s",
			mport.sel, strerror(rc));
	}

	return rc;
}

static int
sfc_mae_rule_parse_action_port_representor(struct sfc_adapter *sa,
		const struct rte_flow_action_ethdev *conf,
		efx_mae_actions_t *spec)
{
	struct sfc_mae *mae = &sa->mae;
	efx_mport_sel_t mport;
	int rc;

	rc = sfc_mae_switch_get_ethdev_mport(mae->switch_domain_id,
					     conf->port_id, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to get m-port for the given ethdev (port_id=%u): %s",
			conf->port_id, strerror(rc));
		return rc;
	}

	rc = efx_mae_action_set_populate_deliver(spec, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to request action DELIVER with m-port selector 0x%08x: %s",
			mport.sel, strerror(rc));
	}

	return rc;
}

static int
sfc_mae_rule_parse_action_represented_port(struct sfc_adapter *sa,
		const struct rte_flow_action_ethdev *conf,
		efx_mae_actions_t *spec)
{
	struct sfc_mae *mae = &sa->mae;
	efx_mport_sel_t mport;
	int rc;

	rc = sfc_mae_switch_get_entity_mport(mae->switch_domain_id,
					     conf->port_id, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to get m-port for the given ethdev (port_id=%u): %s",
			conf->port_id, strerror(rc));
		return rc;
	}

	rc = efx_mae_action_set_populate_deliver(spec, &mport);
	if (rc != 0) {
		sfc_err(sa, "failed to request action DELIVER with m-port selector 0x%08x: %s",
			mport.sel, strerror(rc));
	}

	return rc;
}

static const char * const action_names[] = {
	[RTE_FLOW_ACTION_TYPE_VXLAN_DECAP] = "VXLAN_DECAP",
	[RTE_FLOW_ACTION_TYPE_OF_POP_VLAN] = "OF_POP_VLAN",
	[RTE_FLOW_ACTION_TYPE_SET_MAC_DST] = "SET_MAC_DST",
	[RTE_FLOW_ACTION_TYPE_SET_MAC_SRC] = "SET_MAC_SRC",
	[RTE_FLOW_ACTION_TYPE_OF_DEC_NW_TTL] = "OF_DEC_NW_TTL",
	[RTE_FLOW_ACTION_TYPE_DEC_TTL] = "DEC_TTL",
	[RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN] = "OF_PUSH_VLAN",
	[RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID] = "OF_SET_VLAN_VID",
	[RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP] = "OF_SET_VLAN_PCP",
	[RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP] = "VXLAN_ENCAP",
	[RTE_FLOW_ACTION_TYPE_COUNT] = "COUNT",
	[RTE_FLOW_ACTION_TYPE_FLAG] = "FLAG",
	[RTE_FLOW_ACTION_TYPE_MARK] = "MARK",
	[RTE_FLOW_ACTION_TYPE_PF] = "PF",
	[RTE_FLOW_ACTION_TYPE_VF] = "VF",
	[RTE_FLOW_ACTION_TYPE_PORT_ID] = "PORT_ID",
	[RTE_FLOW_ACTION_TYPE_PORT_REPRESENTOR] = "PORT_REPRESENTOR",
	[RTE_FLOW_ACTION_TYPE_REPRESENTED_PORT] = "REPRESENTED_PORT",
	[RTE_FLOW_ACTION_TYPE_DROP] = "DROP",
	[RTE_FLOW_ACTION_TYPE_JUMP] = "JUMP",
};

static int
sfc_mae_rule_parse_action(struct sfc_adapter *sa,
			  const struct rte_flow_action *action,
			  const struct sfc_flow_spec_mae *spec_mae,
			  struct sfc_mae_actions_bundle *bundle,
			  struct sfc_mae_aset_ctx *ctx,
			  struct rte_flow_error *error)
{
	const struct sfc_mae_outer_rule *outer_rule = spec_mae->outer_rule;
	const uint64_t rx_metadata = sa->negotiated_rx_metadata;
	efx_mae_actions_t *spec = ctx->spec;
	bool custom_error = B_FALSE;
	int rc = 0;

	switch (action->type) {
	case RTE_FLOW_ACTION_TYPE_VXLAN_DECAP:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_VXLAN_DECAP,
				       bundle->actions_mask);
		if (outer_rule == NULL ||
		    outer_rule->encap_type != EFX_TUNNEL_PROTOCOL_VXLAN)
			rc = EINVAL;
		else
			rc = efx_mae_action_set_populate_decap(spec);
		break;
	case RTE_FLOW_ACTION_TYPE_OF_POP_VLAN:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_OF_POP_VLAN,
				       bundle->actions_mask);
		rc = efx_mae_action_set_populate_vlan_pop(spec);
		break;
	case RTE_FLOW_ACTION_TYPE_SET_MAC_DST:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_SET_MAC_DST,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_set_mac(sa, SFC_MAE_MAC_ADDR_DST,
						       action->conf, ctx,
						       error);
		custom_error = B_TRUE;
		break;
	case RTE_FLOW_ACTION_TYPE_SET_MAC_SRC:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_SET_MAC_SRC,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_set_mac(sa, SFC_MAE_MAC_ADDR_SRC,
						       action->conf, ctx,
						       error);
		custom_error = B_TRUE;
		break;
	case RTE_FLOW_ACTION_TYPE_OF_DEC_NW_TTL:
	case RTE_FLOW_ACTION_TYPE_DEC_TTL:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_OF_DEC_NW_TTL,
				       bundle->actions_mask);
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_DEC_TTL,
				       bundle->actions_mask);
		rc = efx_mae_action_set_populate_decr_ip_ttl(spec);
		break;
	case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN,
				       bundle->actions_mask);
		sfc_mae_rule_parse_action_of_push_vlan(action->conf, bundle);
		break;
	case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID,
				       bundle->actions_mask);
		sfc_mae_rule_parse_action_of_set_vlan_vid(action->conf, bundle);
		break;
	case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP,
				       bundle->actions_mask);
		sfc_mae_rule_parse_action_of_set_vlan_pcp(action->conf, bundle);
		break;
	case RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_vxlan_encap(&sa->mae,
							   action->conf,
							   spec, error);
		custom_error = B_TRUE;
		break;
	case RTE_FLOW_ACTION_TYPE_COUNT:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_COUNT,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_count(sa, action->conf, spec);
		break;
	case RTE_FLOW_ACTION_TYPE_FLAG:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_FLAG,
				       bundle->actions_mask);
		if ((rx_metadata & RTE_ETH_RX_METADATA_USER_FLAG) != 0) {
			rc = efx_mae_action_set_populate_flag(spec);
		} else {
			rc = rte_flow_error_set(error, ENOTSUP,
						RTE_FLOW_ERROR_TYPE_ACTION,
						action,
						"flag delivery has not been negotiated");
			custom_error = B_TRUE;
		}
		break;
	case RTE_FLOW_ACTION_TYPE_MARK:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_MARK,
				       bundle->actions_mask);
		if ((rx_metadata & RTE_ETH_RX_METADATA_USER_MARK) != 0 ||
		    spec_mae->ft_rule_type == SFC_FT_RULE_TUNNEL) {
			rc = sfc_mae_rule_parse_action_mark(sa, action->conf,
							    spec_mae, spec);
		} else {
			rc = rte_flow_error_set(error, ENOTSUP,
						RTE_FLOW_ERROR_TYPE_ACTION,
						action,
						"mark delivery has not been negotiated");
			custom_error = B_TRUE;
		}
		break;
	case RTE_FLOW_ACTION_TYPE_PF:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_PF,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_pf_vf(sa, NULL, spec);
		break;
	case RTE_FLOW_ACTION_TYPE_VF:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_VF,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_pf_vf(sa, action->conf, spec);
		break;
	case RTE_FLOW_ACTION_TYPE_PORT_ID:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_PORT_ID,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_port_id(sa, action->conf, spec);
		break;
	case RTE_FLOW_ACTION_TYPE_PORT_REPRESENTOR:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_PORT_REPRESENTOR,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_port_representor(sa,
				action->conf, spec);
		break;
	case RTE_FLOW_ACTION_TYPE_REPRESENTED_PORT:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_REPRESENTED_PORT,
				       bundle->actions_mask);
		rc = sfc_mae_rule_parse_action_represented_port(sa,
				action->conf, spec);
		break;
	case RTE_FLOW_ACTION_TYPE_DROP:
		SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_DROP,
				       bundle->actions_mask);
		rc = efx_mae_action_set_populate_drop(spec);
		break;
	case RTE_FLOW_ACTION_TYPE_JUMP:
		if (spec_mae->ft_rule_type == SFC_FT_RULE_TUNNEL) {
			/* Workaround. See sfc_flow_parse_rte_to_mae() */
			break;
		}
		/* FALLTHROUGH */
	default:
		return rte_flow_error_set(error, ENOTSUP,
				RTE_FLOW_ERROR_TYPE_ACTION, NULL,
				"Unsupported action");
	}

	if (rc == 0) {
		bundle->actions_mask |= (1ULL << action->type);
	} else if (!custom_error) {
		if (action->type < RTE_DIM(action_names)) {
			const char *action_name = action_names[action->type];

			if (action_name != NULL) {
				sfc_err(sa, "action %s was rejected: %s",
					action_name, strerror(rc));
			}
		}
		rc = rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_ACTION,
				NULL, "Failed to request the action");
	}

	return rc;
}

static void
sfc_mae_bounce_eh_invalidate(struct sfc_mae_bounce_eh *bounce_eh)
{
	bounce_eh->type = EFX_TUNNEL_PROTOCOL_NONE;
}

static int
sfc_mae_process_encap_header(struct sfc_adapter *sa,
			     const struct sfc_mae_bounce_eh *bounce_eh,
			     struct sfc_mae_encap_header **encap_headerp)
{
	if (bounce_eh->type == EFX_TUNNEL_PROTOCOL_NONE) {
		encap_headerp = NULL;
		return 0;
	}

	*encap_headerp = sfc_mae_encap_header_attach(sa, bounce_eh);
	if (*encap_headerp != NULL)
		return 0;

	return sfc_mae_encap_header_add(sa, bounce_eh, encap_headerp);
}

int
sfc_mae_rule_parse_actions(struct sfc_adapter *sa,
			   const struct rte_flow_action actions[],
			   struct sfc_flow_spec_mae *spec_mae,
			   struct rte_flow_error *error)
{
	struct sfc_mae_actions_bundle bundle = {0};
	const struct rte_flow_action *action;
	struct sfc_mae_aset_ctx ctx = {0};
	struct sfc_mae *mae = &sa->mae;
	int rc;

	rte_errno = 0;

	if (actions == NULL) {
		return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
				"NULL actions");
	}

	rc = efx_mae_action_set_spec_init(sa->nic, &ctx.spec);
	if (rc != 0)
		goto fail_action_set_spec_init;

	for (action = actions;
	     action->type != RTE_FLOW_ACTION_TYPE_END; ++action) {
		if (action->type == RTE_FLOW_ACTION_TYPE_COUNT)
			++(ctx.n_counters);
	}

	if (spec_mae->ft_rule_type == SFC_FT_RULE_SWITCH) {
		/* TUNNEL rules don't decapsulate packets. SWITCH rules do. */
		rc = efx_mae_action_set_populate_decap(ctx.spec);
		if (rc != 0)
			goto fail_enforce_ft_decap;

		if (ctx.n_counters == 0 &&
		    sfc_mae_counter_stream_enabled(sa)) {
			/*
			 * The user opted not to use action COUNT in this rule,
			 * but the counter should be enabled implicitly because
			 * packets hitting this rule contribute to the tunnel's
			 * total number of hits. See sfc_mae_counter_get().
			 */
			rc = efx_mae_action_set_populate_count(ctx.spec);
			if (rc != 0)
				goto fail_enforce_ft_count;

			ctx.n_counters = 1;
		}
	}

	/* Cleanup after previous encap. header bounce buffer usage. */
	sfc_mae_bounce_eh_invalidate(&mae->bounce_eh);

	for (action = actions;
	     action->type != RTE_FLOW_ACTION_TYPE_END; ++action) {
		rc = sfc_mae_actions_bundle_sync(action, &bundle,
						 ctx.spec, error);
		if (rc != 0)
			goto fail_rule_parse_action;

		rc = sfc_mae_rule_parse_action(sa, action, spec_mae,
					       &bundle, &ctx, error);
		if (rc != 0)
			goto fail_rule_parse_action;
	}

	rc = sfc_mae_actions_bundle_sync(action, &bundle, ctx.spec, error);
	if (rc != 0)
		goto fail_rule_parse_action;

	rc = sfc_mae_process_encap_header(sa, &mae->bounce_eh,
					  &ctx.encap_header);
	if (rc != 0)
		goto fail_process_encap_header;

	if (ctx.n_counters > 1) {
		rc = ENOTSUP;
		sfc_err(sa, "too many count actions requested: %u",
			ctx.n_counters);
		goto fail_nb_count;
	}

	switch (spec_mae->ft_rule_type) {
	case SFC_FT_RULE_NONE:
		break;
	case SFC_FT_RULE_TUNNEL:
		/* Workaround. See sfc_flow_parse_rte_to_mae() */
		rc = sfc_mae_rule_parse_action_pf_vf(sa, NULL, ctx.spec);
		if (rc != 0)
			goto fail_workaround_tunnel_delivery;

		ctx.counter_ft_ctx = spec_mae->ft_ctx;
		break;
	case SFC_FT_RULE_SWITCH:
		/*
		 * Packets that go to the rule's AR have FT mark set (from the
		 * TUNNEL rule OR's RECIRC_ID). Remove this mark in matching
		 * packets. The user may have provided their own action
		 * MARK above, so don't check the return value here.
		 */
		(void)efx_mae_action_set_populate_mark(ctx.spec, 0);

		ctx.ft_switch_hit_counter =
			&spec_mae->ft_ctx->switch_hit_counter;
		break;
	default:
		SFC_ASSERT(B_FALSE);
	}

	spec_mae->action_set = sfc_mae_action_set_attach(sa, &ctx);
	if (spec_mae->action_set != NULL) {
		sfc_mae_encap_header_del(sa, ctx.encap_header);
		efx_mae_action_set_spec_fini(sa->nic, ctx.spec);
		return 0;
	}

	rc = sfc_mae_action_set_add(sa, actions, &ctx, &spec_mae->action_set);
	if (rc != 0)
		goto fail_action_set_add;

	return 0;

fail_action_set_add:
fail_workaround_tunnel_delivery:
fail_nb_count:
	sfc_mae_encap_header_del(sa, ctx.encap_header);

fail_process_encap_header:
fail_rule_parse_action:
	sfc_mae_mac_addr_del(sa, ctx.src_mac);
	sfc_mae_mac_addr_del(sa, ctx.dst_mac);
	efx_mae_action_set_spec_fini(sa->nic, ctx.spec);

fail_enforce_ft_count:
fail_enforce_ft_decap:
fail_action_set_spec_init:
	if (rc > 0 && rte_errno == 0) {
		rc = rte_flow_error_set(error, rc,
			RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
			NULL, "Failed to process the action");
	}
	return rc;
}

static bool
sfc_mae_rules_class_cmp(struct sfc_adapter *sa,
			const efx_mae_match_spec_t *left,
			const efx_mae_match_spec_t *right)
{
	bool have_same_class;
	int rc;

	rc = efx_mae_match_specs_class_cmp(sa->nic, left, right,
					   &have_same_class);

	return (rc == 0) ? have_same_class : false;
}

static int
sfc_mae_outer_rule_class_verify(struct sfc_adapter *sa,
				struct sfc_mae_outer_rule *rule)
{
	struct sfc_mae_fw_rsrc *fw_rsrc = &rule->fw_rsrc;
	struct sfc_mae_outer_rule *entry;
	struct sfc_mae *mae = &sa->mae;

	if (fw_rsrc->rule_id.id != EFX_MAE_RSRC_ID_INVALID) {
		/* An active rule is reused. It's class is wittingly valid. */
		return 0;
	}

	TAILQ_FOREACH_REVERSE(entry, &mae->outer_rules,
			      sfc_mae_outer_rules, entries) {
		const efx_mae_match_spec_t *left = entry->match_spec;
		const efx_mae_match_spec_t *right = rule->match_spec;

		if (entry == rule)
			continue;

		if (sfc_mae_rules_class_cmp(sa, left, right))
			return 0;
	}

	sfc_info(sa, "for now, the HW doesn't support rule validation, and HW "
		 "support for outer frame pattern items is not guaranteed; "
		 "other than that, the items are valid from SW standpoint");
	return 0;
}

static int
sfc_mae_action_rule_class_verify(struct sfc_adapter *sa,
				 struct sfc_flow_spec_mae *spec)
{
	const struct rte_flow *entry;

	if (spec->match_spec == NULL)
		return 0;

	TAILQ_FOREACH_REVERSE(entry, &sa->flow_list, sfc_flow_list, entries) {
		const struct sfc_flow_spec *entry_spec = &entry->spec;
		const struct sfc_flow_spec_mae *es_mae = &entry_spec->mae;
		const efx_mae_match_spec_t *left = es_mae->match_spec;
		const efx_mae_match_spec_t *right = spec->match_spec;

		switch (entry_spec->type) {
		case SFC_FLOW_SPEC_FILTER:
			/* Ignore VNIC-level flows */
			break;
		case SFC_FLOW_SPEC_MAE:
			if (sfc_mae_rules_class_cmp(sa, left, right))
				return 0;
			break;
		default:
			SFC_ASSERT(false);
		}
	}

	sfc_info(sa, "for now, the HW doesn't support rule validation, and HW "
		 "support for inner frame pattern items is not guaranteed; "
		 "other than that, the items are valid from SW standpoint");
	return 0;
}

/**
 * Confirm that a given flow can be accepted by the FW.
 *
 * @param sa
 *   Software adapter context
 * @param flow
 *   Flow to be verified
 * @return
 *   Zero on success and non-zero in the case of error.
 *   A special value of EAGAIN indicates that the adapter is
 *   not in started state. This state is compulsory because
 *   it only makes sense to compare the rule class of the flow
 *   being validated with classes of the active rules.
 *   Such classes are wittingly supported by the FW.
 */
int
sfc_mae_flow_verify(struct sfc_adapter *sa,
		    struct rte_flow *flow)
{
	struct sfc_flow_spec *spec = &flow->spec;
	struct sfc_flow_spec_mae *spec_mae = &spec->mae;
	struct sfc_mae_outer_rule *outer_rule = spec_mae->outer_rule;
	int rc;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	if (sa->state != SFC_ETHDEV_STARTED)
		return EAGAIN;

	if (outer_rule != NULL) {
		rc = sfc_mae_outer_rule_class_verify(sa, outer_rule);
		if (rc != 0)
			return rc;
	}

	return sfc_mae_action_rule_class_verify(sa, spec_mae);
}

int
sfc_mae_flow_insert(struct sfc_adapter *sa,
		    struct rte_flow *flow)
{
	struct sfc_flow_spec *spec = &flow->spec;
	struct sfc_flow_spec_mae *spec_mae = &spec->mae;
	struct sfc_mae_outer_rule *outer_rule = spec_mae->outer_rule;
	struct sfc_mae_action_set *action_set = spec_mae->action_set;
	struct sfc_mae_fw_rsrc *fw_rsrc;
	int rc;

	SFC_ASSERT(spec_mae->rule_id.id == EFX_MAE_RSRC_ID_INVALID);

	if (outer_rule != NULL) {
		rc = sfc_mae_outer_rule_enable(sa, outer_rule,
					       spec_mae->match_spec);
		if (rc != 0)
			goto fail_outer_rule_enable;
	}

	if (spec_mae->ft_rule_type == SFC_FT_RULE_TUNNEL) {
		spec_mae->ft_ctx->reset_tunnel_hit_counter =
			spec_mae->ft_ctx->switch_hit_counter;
	}

	if (action_set == NULL) {
		sfc_dbg(sa, "enabled flow=%p (no AR)", flow);
		return 0;
	}

	rc = sfc_mae_action_set_enable(sa, action_set);
	if (rc != 0)
		goto fail_action_set_enable;

	if (action_set->n_counters > 0) {
		rc = sfc_mae_counter_start(sa);
		if (rc != 0) {
			sfc_err(sa, "failed to start MAE counters support: %s",
				rte_strerror(rc));
			goto fail_mae_counter_start;
		}
	}

	fw_rsrc = &action_set->fw_rsrc;

	rc = efx_mae_action_rule_insert(sa->nic, spec_mae->match_spec,
					NULL, &fw_rsrc->aset_id,
					&spec_mae->rule_id);
	if (rc != 0)
		goto fail_action_rule_insert;

	sfc_dbg(sa, "enabled flow=%p: AR_ID=0x%08x",
		flow, spec_mae->rule_id.id);

	return 0;

fail_action_rule_insert:
fail_mae_counter_start:
	sfc_mae_action_set_disable(sa, action_set);

fail_action_set_enable:
	if (outer_rule != NULL)
		sfc_mae_outer_rule_disable(sa, outer_rule);

fail_outer_rule_enable:
	return rc;
}

int
sfc_mae_flow_remove(struct sfc_adapter *sa,
		    struct rte_flow *flow)
{
	struct sfc_flow_spec *spec = &flow->spec;
	struct sfc_flow_spec_mae *spec_mae = &spec->mae;
	struct sfc_mae_action_set *action_set = spec_mae->action_set;
	struct sfc_mae_outer_rule *outer_rule = spec_mae->outer_rule;
	int rc;

	if (action_set == NULL) {
		sfc_dbg(sa, "disabled flow=%p (no AR)", flow);
		goto skip_action_rule;
	}

	SFC_ASSERT(spec_mae->rule_id.id != EFX_MAE_RSRC_ID_INVALID);

	rc = efx_mae_action_rule_remove(sa->nic, &spec_mae->rule_id);
	if (rc != 0) {
		sfc_err(sa, "failed to disable flow=%p with AR_ID=0x%08x: %s",
			flow, spec_mae->rule_id.id, strerror(rc));
	}
	sfc_dbg(sa, "disabled flow=%p with AR_ID=0x%08x",
		flow, spec_mae->rule_id.id);
	spec_mae->rule_id.id = EFX_MAE_RSRC_ID_INVALID;

	sfc_mae_action_set_disable(sa, action_set);

skip_action_rule:
	if (outer_rule != NULL)
		sfc_mae_outer_rule_disable(sa, outer_rule);

	return 0;
}

static int
sfc_mae_query_counter(struct sfc_adapter *sa,
		      struct sfc_flow_spec_mae *spec,
		      const struct rte_flow_action *action,
		      struct rte_flow_query_count *data,
		      struct rte_flow_error *error)
{
	struct sfc_mae_action_set *action_set = spec->action_set;
	const struct rte_flow_action_count *conf = action->conf;
	unsigned int i;
	int rc;

	if (action_set == NULL || action_set->n_counters == 0) {
		return rte_flow_error_set(error, EINVAL,
			RTE_FLOW_ERROR_TYPE_ACTION, action,
			"Queried flow rule does not have count actions");
	}

	for (i = 0; i < action_set->n_counters; i++) {
		/*
		 * Get the first available counter of the flow rule if
		 * counter ID is not specified, provided that this
		 * counter is not an automatic (implicit) one.
		 */
		if (conf != NULL && action_set->counters[i].rte_id != conf->id)
			continue;

		rc = sfc_mae_counter_get(&sa->mae.counter_registry.counters,
					 &action_set->counters[i], data);
		if (rc != 0) {
			return rte_flow_error_set(error, EINVAL,
				RTE_FLOW_ERROR_TYPE_ACTION, action,
				"Queried flow rule counter action is invalid");
		}

		return 0;
	}

	return rte_flow_error_set(error, ENOENT,
				  RTE_FLOW_ERROR_TYPE_ACTION, action,
				  "no such flow rule action or such count ID");
}

int
sfc_mae_flow_query(struct rte_eth_dev *dev,
		   struct rte_flow *flow,
		   const struct rte_flow_action *action,
		   void *data,
		   struct rte_flow_error *error)
{
	struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
	struct sfc_flow_spec *spec = &flow->spec;
	struct sfc_flow_spec_mae *spec_mae = &spec->mae;

	switch (action->type) {
	case RTE_FLOW_ACTION_TYPE_COUNT:
		return sfc_mae_query_counter(sa, spec_mae, action,
					     data, error);
	default:
		return rte_flow_error_set(error, ENOTSUP,
			RTE_FLOW_ERROR_TYPE_ACTION, NULL,
			"Query for action of this type is not supported");
	}
}

int
sfc_mae_switchdev_init(struct sfc_adapter *sa)
{
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	struct sfc_mae *mae = &sa->mae;
	efx_mport_sel_t pf;
	efx_mport_sel_t phy;
	int rc;

	sfc_log_init(sa, "entry");

	if (!sa->switchdev) {
		sfc_log_init(sa, "switchdev is not enabled - skip");
		return 0;
	}

	if (mae->status != SFC_MAE_STATUS_ADMIN) {
		rc = ENOTSUP;
		sfc_err(sa, "failed to init switchdev - no admin MAE privilege");
		goto fail_no_mae;
	}

	rc = efx_mae_mport_by_pcie_function(encp->enc_pf, EFX_PCI_VF_INVALID,
					    &pf);
	if (rc != 0) {
		sfc_err(sa, "failed get PF mport");
		goto fail_pf_get;
	}

	rc = efx_mae_mport_by_phy_port(encp->enc_assigned_port, &phy);
	if (rc != 0) {
		sfc_err(sa, "failed get PHY mport");
		goto fail_phy_get;
	}

	rc = sfc_mae_rule_add_mport_match_deliver(sa, &pf, &phy,
			SFC_MAE_RULE_PRIO_LOWEST,
			&mae->switchdev_rule_pf_to_ext);
	if (rc != 0) {
		sfc_err(sa, "failed add MAE rule to forward from PF to PHY");
		goto fail_pf_add;
	}

	rc = sfc_mae_rule_add_mport_match_deliver(sa, &phy, &pf,
			SFC_MAE_RULE_PRIO_LOWEST,
			&mae->switchdev_rule_ext_to_pf);
	if (rc != 0) {
		sfc_err(sa, "failed add MAE rule to forward from PHY to PF");
		goto fail_phy_add;
	}

	sfc_log_init(sa, "done");

	return 0;

fail_phy_add:
	sfc_mae_rule_del(sa, mae->switchdev_rule_pf_to_ext);

fail_pf_add:
fail_phy_get:
fail_pf_get:
fail_no_mae:
	sfc_log_init(sa, "failed: %s", rte_strerror(rc));
	return rc;
}

void
sfc_mae_switchdev_fini(struct sfc_adapter *sa)
{
	struct sfc_mae *mae = &sa->mae;

	if (!sa->switchdev)
		return;

	sfc_mae_rule_del(sa, mae->switchdev_rule_pf_to_ext);
	sfc_mae_rule_del(sa, mae->switchdev_rule_ext_to_pf);
}
