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