1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2019 Netronome Systems, Inc. */
4 #include <linux/math64.h>
5 #include <net/pkt_cls.h>
6 #include <net/pkt_sched.h>
10 #include "../nfp_port.h"
12 #define NFP_FL_QOS_UPDATE msecs_to_jiffies(1000)
14 struct nfp_police_cfg_head {
19 /* Police cmsg for configuring a trTCM traffic conditioner (8W/32B)
20 * See RFC 2698 for more details.
21 * ----------------------------------------------------------------
23 * 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
24 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
26 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
28 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
29 * | Token Bucket Peak |
30 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
31 * | Token Bucket Committed |
32 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
34 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
35 * | Committed Burst Size |
36 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
37 * | Peak Information Rate |
38 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
39 * | Committed Information Rate |
40 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
42 struct nfp_police_config {
43 struct nfp_police_cfg_head head;
52 struct nfp_police_stats_reply {
53 struct nfp_police_cfg_head head;
61 nfp_flower_install_rate_limiter(struct nfp_app *app, struct net_device *netdev,
62 struct tc_cls_matchall_offload *flow,
63 struct netlink_ext_ack *extack)
65 struct flow_action_entry *action = &flow->rule->action.entries[0];
66 struct nfp_flower_priv *fl_priv = app->priv;
67 struct nfp_flower_repr_priv *repr_priv;
68 struct nfp_police_config *config;
69 struct nfp_repr *repr;
74 if (!nfp_netdev_is_nfp_repr(netdev)) {
75 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
78 repr = netdev_priv(netdev);
79 repr_priv = repr->app_priv;
81 if (repr_priv->block_shared) {
82 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on shared blocks");
86 if (repr->port->type != NFP_PORT_VF_PORT) {
87 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on non-VF ports");
91 if (!flow_offload_has_one_action(&flow->rule->action)) {
92 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires a single action");
96 if (flow->common.prio != (1 << 16)) {
97 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires highest priority");
101 if (action->id != FLOW_ACTION_POLICE) {
102 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload requires police action");
106 rate = action->police.rate_bytes_ps;
107 burst = div_u64(rate * PSCHED_NS2TICKS(action->police.burst),
108 PSCHED_TICKS_PER_SEC);
109 netdev_port_id = nfp_repr_get_port_id(netdev);
111 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(struct nfp_police_config),
112 NFP_FLOWER_CMSG_TYPE_QOS_MOD, GFP_KERNEL);
116 config = nfp_flower_cmsg_get_data(skb);
117 memset(config, 0, sizeof(struct nfp_police_config));
118 config->head.port = cpu_to_be32(netdev_port_id);
119 config->bkt_tkn_p = cpu_to_be32(burst);
120 config->bkt_tkn_c = cpu_to_be32(burst);
121 config->pbs = cpu_to_be32(burst);
122 config->cbs = cpu_to_be32(burst);
123 config->pir = cpu_to_be32(rate);
124 config->cir = cpu_to_be32(rate);
125 nfp_ctrl_tx(repr->app->ctrl, skb);
127 repr_priv->qos_table.netdev_port_id = netdev_port_id;
128 fl_priv->qos_rate_limiters++;
129 if (fl_priv->qos_rate_limiters == 1)
130 schedule_delayed_work(&fl_priv->qos_stats_work,
137 nfp_flower_remove_rate_limiter(struct nfp_app *app, struct net_device *netdev,
138 struct tc_cls_matchall_offload *flow,
139 struct netlink_ext_ack *extack)
141 struct nfp_flower_priv *fl_priv = app->priv;
142 struct nfp_flower_repr_priv *repr_priv;
143 struct nfp_police_config *config;
144 struct nfp_repr *repr;
148 if (!nfp_netdev_is_nfp_repr(netdev)) {
149 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
152 repr = netdev_priv(netdev);
154 netdev_port_id = nfp_repr_get_port_id(netdev);
155 repr_priv = repr->app_priv;
157 if (!repr_priv->qos_table.netdev_port_id) {
158 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot remove qos entry that does not exist");
162 skb = nfp_flower_cmsg_alloc(repr->app, sizeof(struct nfp_police_config),
163 NFP_FLOWER_CMSG_TYPE_QOS_DEL, GFP_KERNEL);
167 /* Clear all qos associate data for this interface */
168 memset(&repr_priv->qos_table, 0, sizeof(struct nfp_fl_qos));
169 fl_priv->qos_rate_limiters--;
170 if (!fl_priv->qos_rate_limiters)
171 cancel_delayed_work_sync(&fl_priv->qos_stats_work);
173 config = nfp_flower_cmsg_get_data(skb);
174 memset(config, 0, sizeof(struct nfp_police_config));
175 config->head.port = cpu_to_be32(netdev_port_id);
176 nfp_ctrl_tx(repr->app->ctrl, skb);
181 void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb)
183 struct nfp_flower_priv *fl_priv = app->priv;
184 struct nfp_flower_repr_priv *repr_priv;
185 struct nfp_police_stats_reply *msg;
186 struct nfp_stat_pair *curr_stats;
187 struct nfp_stat_pair *prev_stats;
188 struct net_device *netdev;
189 struct nfp_repr *repr;
192 msg = nfp_flower_cmsg_get_data(skb);
193 netdev_port_id = be32_to_cpu(msg->head.port);
195 netdev = nfp_app_dev_get(app, netdev_port_id, NULL);
197 goto exit_unlock_rcu;
199 repr = netdev_priv(netdev);
200 repr_priv = repr->app_priv;
201 curr_stats = &repr_priv->qos_table.curr_stats;
202 prev_stats = &repr_priv->qos_table.prev_stats;
204 spin_lock_bh(&fl_priv->qos_stats_lock);
205 curr_stats->pkts = be64_to_cpu(msg->pass_pkts) +
206 be64_to_cpu(msg->drop_pkts);
207 curr_stats->bytes = be64_to_cpu(msg->pass_bytes) +
208 be64_to_cpu(msg->drop_bytes);
210 if (!repr_priv->qos_table.last_update) {
211 prev_stats->pkts = curr_stats->pkts;
212 prev_stats->bytes = curr_stats->bytes;
215 repr_priv->qos_table.last_update = jiffies;
216 spin_unlock_bh(&fl_priv->qos_stats_lock);
223 nfp_flower_stats_rlim_request(struct nfp_flower_priv *fl_priv,
226 struct nfp_police_cfg_head *head;
229 skb = nfp_flower_cmsg_alloc(fl_priv->app,
230 sizeof(struct nfp_police_cfg_head),
231 NFP_FLOWER_CMSG_TYPE_QOS_STATS,
236 head = nfp_flower_cmsg_get_data(skb);
237 memset(head, 0, sizeof(struct nfp_police_cfg_head));
238 head->port = cpu_to_be32(netdev_port_id);
240 nfp_ctrl_tx(fl_priv->app->ctrl, skb);
244 nfp_flower_stats_rlim_request_all(struct nfp_flower_priv *fl_priv)
246 struct nfp_reprs *repr_set;
250 repr_set = rcu_dereference(fl_priv->app->reprs[NFP_REPR_TYPE_VF]);
252 goto exit_unlock_rcu;
254 for (i = 0; i < repr_set->num_reprs; i++) {
255 struct net_device *netdev;
257 netdev = rcu_dereference(repr_set->reprs[i]);
259 struct nfp_repr *priv = netdev_priv(netdev);
260 struct nfp_flower_repr_priv *repr_priv;
263 repr_priv = priv->app_priv;
264 netdev_port_id = repr_priv->qos_table.netdev_port_id;
268 nfp_flower_stats_rlim_request(fl_priv, netdev_port_id);
276 static void update_stats_cache(struct work_struct *work)
278 struct delayed_work *delayed_work;
279 struct nfp_flower_priv *fl_priv;
281 delayed_work = to_delayed_work(work);
282 fl_priv = container_of(delayed_work, struct nfp_flower_priv,
285 nfp_flower_stats_rlim_request_all(fl_priv);
286 schedule_delayed_work(&fl_priv->qos_stats_work, NFP_FL_QOS_UPDATE);
290 nfp_flower_stats_rate_limiter(struct nfp_app *app, struct net_device *netdev,
291 struct tc_cls_matchall_offload *flow,
292 struct netlink_ext_ack *extack)
294 struct nfp_flower_priv *fl_priv = app->priv;
295 struct nfp_flower_repr_priv *repr_priv;
296 struct nfp_stat_pair *curr_stats;
297 struct nfp_stat_pair *prev_stats;
298 u64 diff_bytes, diff_pkts;
299 struct nfp_repr *repr;
301 if (!nfp_netdev_is_nfp_repr(netdev)) {
302 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
305 repr = netdev_priv(netdev);
307 repr_priv = repr->app_priv;
308 if (!repr_priv->qos_table.netdev_port_id) {
309 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot find qos entry for stats update");
313 spin_lock_bh(&fl_priv->qos_stats_lock);
314 curr_stats = &repr_priv->qos_table.curr_stats;
315 prev_stats = &repr_priv->qos_table.prev_stats;
316 diff_pkts = curr_stats->pkts - prev_stats->pkts;
317 diff_bytes = curr_stats->bytes - prev_stats->bytes;
318 prev_stats->pkts = curr_stats->pkts;
319 prev_stats->bytes = curr_stats->bytes;
320 spin_unlock_bh(&fl_priv->qos_stats_lock);
322 flow_stats_update(&flow->stats, diff_bytes, diff_pkts,
323 repr_priv->qos_table.last_update);
327 void nfp_flower_qos_init(struct nfp_app *app)
329 struct nfp_flower_priv *fl_priv = app->priv;
331 spin_lock_init(&fl_priv->qos_stats_lock);
332 INIT_DELAYED_WORK(&fl_priv->qos_stats_work, &update_stats_cache);
335 void nfp_flower_qos_cleanup(struct nfp_app *app)
337 struct nfp_flower_priv *fl_priv = app->priv;
339 cancel_delayed_work_sync(&fl_priv->qos_stats_work);
342 int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev,
343 struct tc_cls_matchall_offload *flow)
345 struct netlink_ext_ack *extack = flow->common.extack;
346 struct nfp_flower_priv *fl_priv = app->priv;
348 if (!(fl_priv->flower_ext_feats & NFP_FL_FEATS_VF_RLIM)) {
349 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support qos rate limit offload");
353 switch (flow->command) {
354 case TC_CLSMATCHALL_REPLACE:
355 return nfp_flower_install_rate_limiter(app, netdev, flow,
357 case TC_CLSMATCHALL_DESTROY:
358 return nfp_flower_remove_rate_limiter(app, netdev, flow,
360 case TC_CLSMATCHALL_STATS:
361 return nfp_flower_stats_rate_limiter(app, netdev, flow,