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// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch driver
* Copyright (c) 2019 Microsemi Corporation
*/
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include "ocelot_ace.h"
static int ocelot_flower_parse_action(struct flow_cls_offload *f,
struct ocelot_ace_rule *ace)
{
const struct flow_action_entry *a;
s64 burst;
u64 rate;
int i;
if (!flow_offload_has_one_action(&f->rule->action))
return -EOPNOTSUPP;
if (!flow_action_basic_hw_stats_check(&f->rule->action,
f->common.extack))
return -EOPNOTSUPP;
flow_action_for_each(i, a, &f->rule->action) {
switch (a->id) {
case FLOW_ACTION_DROP:
ace->action = OCELOT_ACL_ACTION_DROP;
break;
case FLOW_ACTION_TRAP:
ace->action = OCELOT_ACL_ACTION_TRAP;
break;
case FLOW_ACTION_POLICE:
ace->action = OCELOT_ACL_ACTION_POLICE;
rate = a->police.rate_bytes_ps;
ace->pol.rate = div_u64(rate, 1000) * 8;
burst = rate * PSCHED_NS2TICKS(a->police.burst);
ace->pol.burst = div_u64(burst, PSCHED_TICKS_PER_SEC);
break;
default:
return -EOPNOTSUPP;
}
}
return 0;
}
static int ocelot_flower_parse(struct flow_cls_offload *f,
struct ocelot_ace_rule *ace)
{
struct flow_rule *rule = flow_cls_offload_flow_rule(f);
struct flow_dissector *dissector = rule->match.dissector;
u16 proto = ntohs(f->common.protocol);
bool match_protocol = true;
if (dissector->used_keys &
~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_PORTS) |
BIT(FLOW_DISSECTOR_KEY_VLAN) |
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS))) {
return -EOPNOTSUPP;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_match_control match;
flow_rule_match_control(rule, &match);
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
struct flow_match_eth_addrs match;
/* The hw support mac matches only for MAC_ETYPE key,
* therefore if other matches(port, tcp flags, etc) are added
* then just bail out
*/
if ((dissector->used_keys &
(BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_CONTROL))) !=
(BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_CONTROL)))
return -EOPNOTSUPP;
flow_rule_match_eth_addrs(rule, &match);
ace->type = OCELOT_ACE_TYPE_ETYPE;
ether_addr_copy(ace->frame.etype.dmac.value,
match.key->dst);
ether_addr_copy(ace->frame.etype.smac.value,
match.key->src);
ether_addr_copy(ace->frame.etype.dmac.mask,
match.mask->dst);
ether_addr_copy(ace->frame.etype.smac.mask,
match.mask->src);
goto finished_key_parsing;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_match_basic match;
flow_rule_match_basic(rule, &match);
if (ntohs(match.key->n_proto) == ETH_P_IP) {
ace->type = OCELOT_ACE_TYPE_IPV4;
ace->frame.ipv4.proto.value[0] =
match.key->ip_proto;
ace->frame.ipv4.proto.mask[0] =
match.mask->ip_proto;
match_protocol = false;
}
if (ntohs(match.key->n_proto) == ETH_P_IPV6) {
ace->type = OCELOT_ACE_TYPE_IPV6;
ace->frame.ipv6.proto.value[0] =
match.key->ip_proto;
ace->frame.ipv6.proto.mask[0] =
match.mask->ip_proto;
match_protocol = false;
}
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS) &&
proto == ETH_P_IP) {
struct flow_match_ipv4_addrs match;
u8 *tmp;
flow_rule_match_ipv4_addrs(rule, &match);
tmp = &ace->frame.ipv4.sip.value.addr[0];
memcpy(tmp, &match.key->src, 4);
tmp = &ace->frame.ipv4.sip.mask.addr[0];
memcpy(tmp, &match.mask->src, 4);
tmp = &ace->frame.ipv4.dip.value.addr[0];
memcpy(tmp, &match.key->dst, 4);
tmp = &ace->frame.ipv4.dip.mask.addr[0];
memcpy(tmp, &match.mask->dst, 4);
match_protocol = false;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS) &&
proto == ETH_P_IPV6) {
return -EOPNOTSUPP;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
struct flow_match_ports match;
flow_rule_match_ports(rule, &match);
ace->frame.ipv4.sport.value = ntohs(match.key->src);
ace->frame.ipv4.sport.mask = ntohs(match.mask->src);
ace->frame.ipv4.dport.value = ntohs(match.key->dst);
ace->frame.ipv4.dport.mask = ntohs(match.mask->dst);
match_protocol = false;
}
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
struct flow_match_vlan match;
flow_rule_match_vlan(rule, &match);
ace->type = OCELOT_ACE_TYPE_ANY;
ace->vlan.vid.value = match.key->vlan_id;
ace->vlan.vid.mask = match.mask->vlan_id;
ace->vlan.pcp.value[0] = match.key->vlan_priority;
ace->vlan.pcp.mask[0] = match.mask->vlan_priority;
match_protocol = false;
}
finished_key_parsing:
if (match_protocol && proto != ETH_P_ALL) {
/* TODO: support SNAP, LLC etc */
if (proto < ETH_P_802_3_MIN)
return -EOPNOTSUPP;
ace->type = OCELOT_ACE_TYPE_ETYPE;
*(u16 *)ace->frame.etype.etype.value = htons(proto);
*(u16 *)ace->frame.etype.etype.mask = 0xffff;
}
/* else, a rule of type OCELOT_ACE_TYPE_ANY is implicitly added */
ace->prio = f->common.prio;
ace->id = f->cookie;
return ocelot_flower_parse_action(f, ace);
}
static
struct ocelot_ace_rule *ocelot_ace_rule_create(struct ocelot *ocelot, int port,
struct flow_cls_offload *f)
{
struct ocelot_ace_rule *ace;
ace = kzalloc(sizeof(*ace), GFP_KERNEL);
if (!ace)
return NULL;
ace->ingress_port_mask = BIT(port);
return ace;
}
int ocelot_cls_flower_replace(struct ocelot *ocelot, int port,
struct flow_cls_offload *f, bool ingress)
{
struct ocelot_ace_rule *ace;
int ret;
ace = ocelot_ace_rule_create(ocelot, port, f);
if (!ace)
return -ENOMEM;
ret = ocelot_flower_parse(f, ace);
if (ret) {
kfree(ace);
return ret;
}
return ocelot_ace_rule_offload_add(ocelot, ace, f->common.extack);
}
EXPORT_SYMBOL_GPL(ocelot_cls_flower_replace);
int ocelot_cls_flower_destroy(struct ocelot *ocelot, int port,
struct flow_cls_offload *f, bool ingress)
{
struct ocelot_ace_rule ace;
ace.prio = f->common.prio;
ace.id = f->cookie;
return ocelot_ace_rule_offload_del(ocelot, &ace);
}
EXPORT_SYMBOL_GPL(ocelot_cls_flower_destroy);
int ocelot_cls_flower_stats(struct ocelot *ocelot, int port,
struct flow_cls_offload *f, bool ingress)
{
struct ocelot_ace_rule ace;
int ret;
ace.prio = f->common.prio;
ace.id = f->cookie;
ret = ocelot_ace_rule_stats_update(ocelot, &ace);
if (ret)
return ret;
flow_stats_update(&f->stats, 0x0, ace.stats.pkts, 0x0,
FLOW_ACTION_HW_STATS_IMMEDIATE);
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_cls_flower_stats);
int ocelot_setup_tc_cls_flower(struct ocelot_port_private *priv,
struct flow_cls_offload *f,
bool ingress)
{
struct ocelot *ocelot = priv->port.ocelot;
int port = priv->chip_port;
if (!ingress)
return -EOPNOTSUPP;
switch (f->command) {
case FLOW_CLS_REPLACE:
return ocelot_cls_flower_replace(ocelot, port, f, ingress);
case FLOW_CLS_DESTROY:
return ocelot_cls_flower_destroy(ocelot, port, f, ingress);
case FLOW_CLS_STATS:
return ocelot_cls_flower_stats(ocelot, port, f, ingress);
default:
return -EOPNOTSUPP;
}
}
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