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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Marvell 88E6xxx Switch flower support
*
* Copyright (c) 2026 Luminex Network Intelligence
*/
#include "chip.h"
#include "tcflower.h"
#include "tcam.h"
#define MV88E6XXX_ETHTYPE_OFFSET 16
#define MV88E6XXX_IP_PROTO_OFFSET 27
#define MV88E6XXX_IPV4_SRC_OFFSET 30
#define MV88E6XXX_IPV4_DST_OFFSET 34
static int mv88e6xxx_flower_parse_key(struct mv88e6xxx_chip *chip,
struct netlink_ext_ack *extack,
struct flow_cls_offload *cls,
struct mv88e6xxx_tcam_key *key)
{
struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
struct flow_dissector *dissector = rule->match.dissector;
u16 addr_type = 0;
if (dissector->used_keys &
~(BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS))) {
NL_SET_ERR_MSG_MOD(extack,
"Unsupported keys used");
return -EOPNOTSUPP;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_match_control match;
flow_rule_match_control(rule, &match);
addr_type = match.key->addr_type;
if (flow_rule_has_control_flags(match.mask->flags,
cls->common.extack))
return -EOPNOTSUPP;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_match_basic match;
flow_rule_match_basic(rule, &match);
mv88e6xxx_tcam_match_set(key, MV88E6XXX_ETHTYPE_OFFSET,
match.key->n_proto,
match.mask->n_proto);
mv88e6xxx_tcam_match_set(key, MV88E6XXX_IP_PROTO_OFFSET,
match.key->ip_proto,
match.mask->ip_proto);
}
if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
struct flow_match_ipv4_addrs match;
flow_rule_match_ipv4_addrs(cls->rule, &match);
mv88e6xxx_tcam_match_set(key, MV88E6XXX_IPV4_SRC_OFFSET,
match.key->src,
match.mask->src);
mv88e6xxx_tcam_match_set(key, MV88E6XXX_IPV4_DST_OFFSET,
match.key->dst,
match.mask->dst);
}
return 0;
}
int mv88e6xxx_cls_flower_add(struct dsa_switch *ds, int port,
struct flow_cls_offload *cls, bool ingress)
{
struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
struct netlink_ext_ack *extack = cls->common.extack;
struct mv88e6xxx_chip *chip = ds->priv;
struct mv88e6xxx_tcam_key key = { 0 };
const struct flow_action_entry *act;
unsigned long cookie = cls->cookie;
struct mv88e6xxx_tcam_entry *entry;
int err, i;
if (!mv88e6xxx_has_tcam(chip)) {
NL_SET_ERR_MSG_MOD(extack, "hardware offload not supported");
return -EOPNOTSUPP;
}
err = mv88e6xxx_flower_parse_key(chip, extack, cls, &key);
if (err)
return err;
mv88e6xxx_reg_lock(chip);
entry = mv88e6xxx_tcam_entry_find(chip, cookie);
if (entry) {
err = -EEXIST;
goto err_unlock;
}
entry = kzalloc_obj(*entry);
if (!entry) {
err = -ENOMEM;
goto err_unlock;
}
entry->cookie = cookie;
entry->prio = cls->common.prio;
entry->key = key;
flow_action_for_each(i, act, &rule->action) {
switch (act->id) {
case FLOW_ACTION_TRAP: {
int cpu = dsa_upstream_port(ds, port);
entry->action.dpv_mode = DPV_MODE_REPLACE;
entry->action.dpv = BIT(cpu);
break;
}
default:
NL_SET_ERR_MSG_MOD(extack, "action not supported");
err = -EOPNOTSUPP;
goto err_free_entry;
}
}
entry->key.spv = BIT(port);
entry->key.spv_mask = mv88e6xxx_port_mask(chip);
err = mv88e6xxx_tcam_entry_add(chip, entry);
if (err)
goto err_free_entry;
mv88e6xxx_reg_unlock(chip);
return 0;
err_free_entry:
kfree(entry);
err_unlock:
mv88e6xxx_reg_unlock(chip);
return err;
}
int mv88e6xxx_cls_flower_del(struct dsa_switch *ds, int port,
struct flow_cls_offload *cls, bool ingress)
{
struct mv88e6xxx_chip *chip = ds->priv;
struct mv88e6xxx_tcam_entry *entry;
int err = 0;
mv88e6xxx_reg_lock(chip);
entry = mv88e6xxx_tcam_entry_find(chip, cls->cookie);
if (entry)
err = mv88e6xxx_tcam_entry_del(chip, entry);
mv88e6xxx_reg_unlock(chip);
return err;
}
void mv88e6xxx_flower_teardown(struct mv88e6xxx_chip *chip)
{
struct mv88e6xxx_tcam_entry *pos, *n;
list_for_each_entry_safe(pos, n, &chip->tcam.entries, list) {
list_del(&pos->list);
kfree(pos);
}
}
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