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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2019 Netronome Systems, Inc. */
#include <linux/math64.h>
#include <net/pkt_cls.h>
#include <net/pkt_sched.h>
#include "cmsg.h"
#include "main.h"
#include "../nfp_port.h"
#define NFP_FL_QOS_UPDATE msecs_to_jiffies(1000)
struct nfp_police_cfg_head {
__be32 flags_opts;
__be32 port;
};
/* Police cmsg for configuring a trTCM traffic conditioner (8W/32B)
* See RFC 2698 for more details.
* ----------------------------------------------------------------
* 3 2 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Flag options |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Port Ingress |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Token Bucket Peak |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Token Bucket Committed |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Peak Burst Size |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Committed Burst Size |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Peak Information Rate |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Committed Information Rate |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct nfp_police_config {
struct nfp_police_cfg_head head;
__be32 bkt_tkn_p;
__be32 bkt_tkn_c;
__be32 pbs;
__be32 cbs;
__be32 pir;
__be32 cir;
};
struct nfp_police_stats_reply {
struct nfp_police_cfg_head head;
__be64 pass_bytes;
__be64 pass_pkts;
__be64 drop_bytes;
__be64 drop_pkts;
};
static int
nfp_flower_install_rate_limiter(struct nfp_app *app, struct net_device *netdev,
struct tc_cls_matchall_offload *flow,
struct netlink_ext_ack *extack)
{
struct flow_action_entry *action = &flow->rule->action.entries[0];
struct nfp_flower_priv *fl_priv = app->priv;
struct nfp_flower_repr_priv *repr_priv;
struct nfp_police_config *config;
struct nfp_repr *repr;
struct sk_buff *skb;
u32 netdev_port_id;
u64 burst, rate;
if (!nfp_netdev_is_nfp_repr(netdev)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
return -EOPNOTSUPP;
}
repr = netdev_priv(netdev);
repr_priv = repr->app_priv;
if (repr_priv->block_shared) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on shared blocks");
return -EOPNOTSUPP;
}
if (repr->port->type != NFP_PORT_VF_PORT) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on non-VF ports");
return -EOPNOTSUPP;
}
if (!flow_offload_has_one_action(&flow->rule->action)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires a single action");
return -EOPNOTSUPP;
}
if (flow->common.prio != (1 << 16)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires highest priority");
return -EOPNOTSUPP;
}
if (action->id != FLOW_ACTION_POLICE) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires police action");
return -EOPNOTSUPP;
}
rate = action->police.rate_bytes_ps;
burst = div_u64(rate * PSCHED_NS2TICKS(action->police.burst),
PSCHED_TICKS_PER_SEC);
netdev_port_id = nfp_repr_get_port_id(netdev);
skb = nfp_flower_cmsg_alloc(repr->app, sizeof(struct nfp_police_config),
NFP_FLOWER_CMSG_TYPE_QOS_MOD, GFP_KERNEL);
if (!skb)
return -ENOMEM;
config = nfp_flower_cmsg_get_data(skb);
memset(config, 0, sizeof(struct nfp_police_config));
config->head.port = cpu_to_be32(netdev_port_id);
config->bkt_tkn_p = cpu_to_be32(burst);
config->bkt_tkn_c = cpu_to_be32(burst);
config->pbs = cpu_to_be32(burst);
config->cbs = cpu_to_be32(burst);
config->pir = cpu_to_be32(rate);
config->cir = cpu_to_be32(rate);
nfp_ctrl_tx(repr->app->ctrl, skb);
repr_priv->qos_table.netdev_port_id = netdev_port_id;
fl_priv->qos_rate_limiters++;
if (fl_priv->qos_rate_limiters == 1)
schedule_delayed_work(&fl_priv->qos_stats_work,
NFP_FL_QOS_UPDATE);
return 0;
}
static int
nfp_flower_remove_rate_limiter(struct nfp_app *app, struct net_device *netdev,
struct tc_cls_matchall_offload *flow,
struct netlink_ext_ack *extack)
{
struct nfp_flower_priv *fl_priv = app->priv;
struct nfp_flower_repr_priv *repr_priv;
struct nfp_police_config *config;
struct nfp_repr *repr;
struct sk_buff *skb;
u32 netdev_port_id;
if (!nfp_netdev_is_nfp_repr(netdev)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
return -EOPNOTSUPP;
}
repr = netdev_priv(netdev);
netdev_port_id = nfp_repr_get_port_id(netdev);
repr_priv = repr->app_priv;
if (!repr_priv->qos_table.netdev_port_id) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot remove qos entry that does not exist");
return -EOPNOTSUPP;
}
skb = nfp_flower_cmsg_alloc(repr->app, sizeof(struct nfp_police_config),
NFP_FLOWER_CMSG_TYPE_QOS_DEL, GFP_KERNEL);
if (!skb)
return -ENOMEM;
/* Clear all qos associate data for this interface */
memset(&repr_priv->qos_table, 0, sizeof(struct nfp_fl_qos));
fl_priv->qos_rate_limiters--;
if (!fl_priv->qos_rate_limiters)
cancel_delayed_work_sync(&fl_priv->qos_stats_work);
config = nfp_flower_cmsg_get_data(skb);
memset(config, 0, sizeof(struct nfp_police_config));
config->head.port = cpu_to_be32(netdev_port_id);
nfp_ctrl_tx(repr->app->ctrl, skb);
return 0;
}
void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb)
{
struct nfp_flower_priv *fl_priv = app->priv;
struct nfp_flower_repr_priv *repr_priv;
struct nfp_police_stats_reply *msg;
struct nfp_stat_pair *curr_stats;
struct nfp_stat_pair *prev_stats;
struct net_device *netdev;
struct nfp_repr *repr;
u32 netdev_port_id;
msg = nfp_flower_cmsg_get_data(skb);
netdev_port_id = be32_to_cpu(msg->head.port);
rcu_read_lock();
netdev = nfp_app_dev_get(app, netdev_port_id, NULL);
if (!netdev)
goto exit_unlock_rcu;
repr = netdev_priv(netdev);
repr_priv = repr->app_priv;
curr_stats = &repr_priv->qos_table.curr_stats;
prev_stats = &repr_priv->qos_table.prev_stats;
spin_lock_bh(&fl_priv->qos_stats_lock);
curr_stats->pkts = be64_to_cpu(msg->pass_pkts) +
be64_to_cpu(msg->drop_pkts);
curr_stats->bytes = be64_to_cpu(msg->pass_bytes) +
be64_to_cpu(msg->drop_bytes);
if (!repr_priv->qos_table.last_update) {
prev_stats->pkts = curr_stats->pkts;
prev_stats->bytes = curr_stats->bytes;
}
repr_priv->qos_table.last_update = jiffies;
spin_unlock_bh(&fl_priv->qos_stats_lock);
exit_unlock_rcu:
rcu_read_unlock();
}
static void
nfp_flower_stats_rlim_request(struct nfp_flower_priv *fl_priv,
u32 netdev_port_id)
{
struct nfp_police_cfg_head *head;
struct sk_buff *skb;
skb = nfp_flower_cmsg_alloc(fl_priv->app,
sizeof(struct nfp_police_cfg_head),
NFP_FLOWER_CMSG_TYPE_QOS_STATS,
GFP_ATOMIC);
if (!skb)
return;
head = nfp_flower_cmsg_get_data(skb);
memset(head, 0, sizeof(struct nfp_police_cfg_head));
head->port = cpu_to_be32(netdev_port_id);
nfp_ctrl_tx(fl_priv->app->ctrl, skb);
}
static void
nfp_flower_stats_rlim_request_all(struct nfp_flower_priv *fl_priv)
{
struct nfp_reprs *repr_set;
int i;
rcu_read_lock();
repr_set = rcu_dereference(fl_priv->app->reprs[NFP_REPR_TYPE_VF]);
if (!repr_set)
goto exit_unlock_rcu;
for (i = 0; i < repr_set->num_reprs; i++) {
struct net_device *netdev;
netdev = rcu_dereference(repr_set->reprs[i]);
if (netdev) {
struct nfp_repr *priv = netdev_priv(netdev);
struct nfp_flower_repr_priv *repr_priv;
u32 netdev_port_id;
repr_priv = priv->app_priv;
netdev_port_id = repr_priv->qos_table.netdev_port_id;
if (!netdev_port_id)
continue;
nfp_flower_stats_rlim_request(fl_priv, netdev_port_id);
}
}
exit_unlock_rcu:
rcu_read_unlock();
}
static void update_stats_cache(struct work_struct *work)
{
struct delayed_work *delayed_work;
struct nfp_flower_priv *fl_priv;
delayed_work = to_delayed_work(work);
fl_priv = container_of(delayed_work, struct nfp_flower_priv,
qos_stats_work);
nfp_flower_stats_rlim_request_all(fl_priv);
schedule_delayed_work(&fl_priv->qos_stats_work, NFP_FL_QOS_UPDATE);
}
static int
nfp_flower_stats_rate_limiter(struct nfp_app *app, struct net_device *netdev,
struct tc_cls_matchall_offload *flow,
struct netlink_ext_ack *extack)
{
struct nfp_flower_priv *fl_priv = app->priv;
struct nfp_flower_repr_priv *repr_priv;
struct nfp_stat_pair *curr_stats;
struct nfp_stat_pair *prev_stats;
u64 diff_bytes, diff_pkts;
struct nfp_repr *repr;
if (!nfp_netdev_is_nfp_repr(netdev)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
return -EOPNOTSUPP;
}
repr = netdev_priv(netdev);
repr_priv = repr->app_priv;
if (!repr_priv->qos_table.netdev_port_id) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot find qos entry for stats update");
return -EOPNOTSUPP;
}
spin_lock_bh(&fl_priv->qos_stats_lock);
curr_stats = &repr_priv->qos_table.curr_stats;
prev_stats = &repr_priv->qos_table.prev_stats;
diff_pkts = curr_stats->pkts - prev_stats->pkts;
diff_bytes = curr_stats->bytes - prev_stats->bytes;
prev_stats->pkts = curr_stats->pkts;
prev_stats->bytes = curr_stats->bytes;
spin_unlock_bh(&fl_priv->qos_stats_lock);
flow_stats_update(&flow->stats, diff_bytes, diff_pkts,
repr_priv->qos_table.last_update);
return 0;
}
void nfp_flower_qos_init(struct nfp_app *app)
{
struct nfp_flower_priv *fl_priv = app->priv;
spin_lock_init(&fl_priv->qos_stats_lock);
INIT_DELAYED_WORK(&fl_priv->qos_stats_work, &update_stats_cache);
}
void nfp_flower_qos_cleanup(struct nfp_app *app)
{
struct nfp_flower_priv *fl_priv = app->priv;
cancel_delayed_work_sync(&fl_priv->qos_stats_work);
}
int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev,
struct tc_cls_matchall_offload *flow)
{
struct netlink_ext_ack *extack = flow->common.extack;
struct nfp_flower_priv *fl_priv = app->priv;
if (!(fl_priv->flower_ext_feats & NFP_FL_FEATS_VF_RLIM)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support qos rate limit offload");
return -EOPNOTSUPP;
}
switch (flow->command) {
case TC_CLSMATCHALL_REPLACE:
return nfp_flower_install_rate_limiter(app, netdev, flow,
extack);
case TC_CLSMATCHALL_DESTROY:
return nfp_flower_remove_rate_limiter(app, netdev, flow,
extack);
case TC_CLSMATCHALL_STATS:
return nfp_flower_stats_rate_limiter(app, netdev, flow,
extack);
default:
return -EOPNOTSUPP;
}
}
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