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path: root/drivers/net/ethernet/netronome/nfp/flower/qos_conf.c
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Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/flower/qos_conf.c')
-rw-r--r--drivers/net/ethernet/netronome/nfp/flower/qos_conf.c366
1 files changed, 366 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/flower/qos_conf.c b/drivers/net/ethernet/netronome/nfp/flower/qos_conf.c
new file mode 100644
index 000000000000..86e968cd5ffd
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/flower/qos_conf.c
@@ -0,0 +1,366 @@
+// 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;
+ }
+}