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// SPDX-License-Identifier: GPL-2.0+
/* Microchip VCAP API
*
* Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries.
*/
#include "sparx5_tc.h"
#include "vcap_api.h"
#include "vcap_api_client.h"
#include "sparx5_main_regs.h"
#include "sparx5_main.h"
#include "sparx5_vcap_impl.h"
static struct sparx5_mall_entry *
sparx5_tc_matchall_entry_find(struct list_head *entries, unsigned long cookie)
{
struct sparx5_mall_entry *entry;
list_for_each_entry(entry, entries, list) {
if (entry->cookie == cookie)
return entry;
}
return NULL;
}
static void sparx5_tc_matchall_parse_action(struct sparx5_port *port,
struct sparx5_mall_entry *entry,
struct flow_action_entry *action,
bool ingress,
unsigned long cookie)
{
entry->port = port;
entry->type = action->id;
entry->ingress = ingress;
entry->cookie = cookie;
}
static void
sparx5_tc_matchall_parse_mirror_action(struct sparx5_mall_entry *entry,
struct flow_action_entry *action)
{
entry->mirror.port = netdev_priv(action->dev);
}
static int sparx5_tc_matchall_replace(struct net_device *ndev,
struct tc_cls_matchall_offload *tmo,
bool ingress)
{
struct sparx5_port *port = netdev_priv(ndev);
struct sparx5_mall_entry *mall_entry;
struct flow_action_entry *action;
struct sparx5 *sparx5;
int err;
if (!flow_offload_has_one_action(&tmo->rule->action)) {
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Only one action per filter is supported");
return -EOPNOTSUPP;
}
action = &tmo->rule->action.entries[0];
mall_entry = kzalloc(sizeof(*mall_entry), GFP_KERNEL);
if (!mall_entry)
return -ENOMEM;
sparx5_tc_matchall_parse_action(port,
mall_entry,
action,
ingress,
tmo->cookie);
sparx5 = port->sparx5;
switch (action->id) {
case FLOW_ACTION_MIRRED:
sparx5_tc_matchall_parse_mirror_action(mall_entry, action);
err = sparx5_mirror_add(mall_entry);
if (err) {
switch (err) {
case -EEXIST:
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Mirroring already exists");
break;
case -EINVAL:
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Cannot mirror a monitor port");
break;
case -ENOENT:
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"No more mirror probes available");
break;
default:
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Unknown error");
break;
}
return err;
}
/* Get baseline stats for this port */
sparx5_mirror_stats(mall_entry, &tmo->stats);
break;
case FLOW_ACTION_GOTO:
err = vcap_enable_lookups(sparx5->vcap_ctrl, ndev,
tmo->common.chain_index,
action->chain_index, tmo->cookie,
true);
if (err == -EFAULT) {
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Unsupported goto chain");
return -EOPNOTSUPP;
}
if (err == -EADDRINUSE) {
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"VCAP already enabled");
return -EOPNOTSUPP;
}
if (err == -EADDRNOTAVAIL) {
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Already matching this chain");
return -EOPNOTSUPP;
}
if (err) {
NL_SET_ERR_MSG_MOD(tmo->common.extack,
"Could not enable VCAP lookups");
return err;
}
break;
default:
NL_SET_ERR_MSG_MOD(tmo->common.extack, "Unsupported action");
return -EOPNOTSUPP;
}
list_add_tail(&mall_entry->list, &sparx5->mall_entries);
return 0;
}
static int sparx5_tc_matchall_destroy(struct net_device *ndev,
struct tc_cls_matchall_offload *tmo,
bool ingress)
{
struct sparx5_port *port = netdev_priv(ndev);
struct sparx5 *sparx5 = port->sparx5;
struct sparx5_mall_entry *entry;
int err = 0;
entry = sparx5_tc_matchall_entry_find(&sparx5->mall_entries,
tmo->cookie);
if (!entry)
return -ENOENT;
if (entry->type == FLOW_ACTION_MIRRED) {
sparx5_mirror_del(entry);
} else if (entry->type == FLOW_ACTION_GOTO) {
err = vcap_enable_lookups(sparx5->vcap_ctrl, ndev,
0, 0, tmo->cookie, false);
} else {
NL_SET_ERR_MSG_MOD(tmo->common.extack, "Unsupported action");
err = -EOPNOTSUPP;
}
list_del(&entry->list);
return err;
}
static int sparx5_tc_matchall_stats(struct net_device *ndev,
struct tc_cls_matchall_offload *tmo,
bool ingress)
{
struct sparx5_port *port = netdev_priv(ndev);
struct sparx5 *sparx5 = port->sparx5;
struct sparx5_mall_entry *entry;
entry = sparx5_tc_matchall_entry_find(&sparx5->mall_entries,
tmo->cookie);
if (!entry)
return -ENOENT;
if (entry->type == FLOW_ACTION_MIRRED) {
sparx5_mirror_stats(entry, &tmo->stats);
} else {
NL_SET_ERR_MSG_MOD(tmo->common.extack, "Unsupported action");
return -EOPNOTSUPP;
}
return 0;
}
int sparx5_tc_matchall(struct net_device *ndev,
struct tc_cls_matchall_offload *tmo,
bool ingress)
{
switch (tmo->command) {
case TC_CLSMATCHALL_REPLACE:
return sparx5_tc_matchall_replace(ndev, tmo, ingress);
case TC_CLSMATCHALL_DESTROY:
return sparx5_tc_matchall_destroy(ndev, tmo, ingress);
case TC_CLSMATCHALL_STATS:
return sparx5_tc_matchall_stats(ndev, tmo, ingress);
default:
return -EOPNOTSUPP;
}
}
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