// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) /* Copyright (C) 2019 Netronome Systems, Inc. */ #include #include #include #include "cmsg.h" #include "main.h" #include "../nfp_port.h" #define NFP_FL_QOS_UPDATE msecs_to_jiffies(1000) #define NFP_FL_QOS_PPS BIT(15) struct nfp_police_cfg_head { __be32 flags_opts; __be32 port; }; enum NFP_FL_QOS_TYPES { NFP_FL_QOS_TYPE_BPS, NFP_FL_QOS_TYPE_PPS, NFP_FL_QOS_TYPE_MAX, }; /* 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Reserved |p| Reserved | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Port Ingress | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Token Bucket Peak | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Token Bucket Committed | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peak Burst Size | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Committed Burst Size | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peak Information Rate | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Committed Information Rate | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * Word[0](FLag options): * [15] p(pps) 1 for pps ,0 for bps * */ 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 *paction = &flow->rule->action.entries[0]; u32 action_num = flow->rule->action.num_entries; struct nfp_flower_priv *fl_priv = app->priv; struct flow_action_entry *action = NULL; struct nfp_flower_repr_priv *repr_priv; struct nfp_police_config *config; u32 netdev_port_id, i; struct nfp_repr *repr; struct sk_buff *skb; bool pps_support; u32 bps_num = 0; u32 pps_num = 0; u32 burst; u64 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; netdev_port_id = nfp_repr_get_port_id(netdev); pps_support = !!(fl_priv->flower_ext_feats & NFP_FL_FEATS_QOS_PPS); 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 (pps_support) { if (action_num > 2 || action_num == 0) { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload only support action number 1 or 2"); return -EOPNOTSUPP; } } else { 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) { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires highest priority"); return -EOPNOTSUPP; } for (i = 0 ; i < action_num; i++) { action = paction + i; if (action->id != FLOW_ACTION_POLICE) { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires police action"); return -EOPNOTSUPP; } if (action->police.rate_bytes_ps > 0) { if (bps_num++) { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload only support one BPS action"); return -EOPNOTSUPP; } } if (action->police.rate_pkt_ps > 0) { if (!pps_support) { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: FW does not support PPS action"); return -EOPNOTSUPP; } if (pps_num++) { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload only support one PPS action"); return -EOPNOTSUPP; } } } for (i = 0 ; i < action_num; i++) { /* Set QoS data for this interface */ action = paction + i; if (action->police.rate_bytes_ps > 0) { rate = action->police.rate_bytes_ps; burst = action->police.burst; } else if (action->police.rate_pkt_ps > 0) { rate = action->police.rate_pkt_ps; burst = action->police.burst_pkt; } else { NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit is not BPS or PPS"); continue; } if (rate != 0) { 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)); if (action->police.rate_pkt_ps > 0) config->head.flags_opts = cpu_to_be32(NFP_FL_QOS_PPS); 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; u32 netdev_port_id, i; struct nfp_repr *repr; struct sk_buff *skb; bool pps_support; 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; pps_support = !!(fl_priv->flower_ext_feats & NFP_FL_FEATS_QOS_PPS); 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; } 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); for (i = 0 ; i < NFP_FL_QOS_TYPE_MAX; i++) { if (i == NFP_FL_QOS_TYPE_PPS && !pps_support) break; /* 0:bps 1:pps * Clear QoS data for this interface. * There is no need to check if a specific QOS_TYPE was * configured as the firmware handles clearing a QoS entry * safely, even if it wasn't explicitly added. */ skb = nfp_flower_cmsg_alloc(repr->app, sizeof(struct nfp_police_config), NFP_FLOWER_CMSG_TYPE_QOS_DEL, GFP_KERNEL); if (!skb) return -ENOMEM; config = nfp_flower_cmsg_get_data(skb); memset(config, 0, sizeof(struct nfp_police_config)); if (i == NFP_FL_QOS_TYPE_PPS) config->head.flags_opts = cpu_to_be32(NFP_FL_QOS_PPS); 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, 0, repr_priv->qos_table.last_update, FLOW_ACTION_HW_STATS_DELAYED); 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; } }