1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2024 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2017 Intel Deutschland GmbH
6 */
7 #include <linux/jiffies.h>
8 #include <net/mac80211.h>
9
10 #include "fw/notif-wait.h"
11 #include "iwl-trans.h"
12 #include "fw-api.h"
13 #include "time-event.h"
14 #include "mvm.h"
15 #include "iwl-io.h"
16 #include "iwl-prph.h"
17
18 /*
19 * For the high priority TE use a time event type that has similar priority to
20 * the FW's action scan priority.
21 */
22 #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE
23 #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC
24
iwl_mvm_te_clear_data(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data)25 void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
26 struct iwl_mvm_time_event_data *te_data)
27 {
28 lockdep_assert_held(&mvm->time_event_lock);
29
30 if (!te_data || !te_data->vif)
31 return;
32
33 list_del(&te_data->list);
34
35 /*
36 * the list is only used for AUX ROC events so make sure it is always
37 * initialized
38 */
39 INIT_LIST_HEAD(&te_data->list);
40
41 te_data->running = false;
42 te_data->uid = 0;
43 te_data->id = TE_MAX;
44 te_data->vif = NULL;
45 te_data->link_id = -1;
46 }
47
iwl_mvm_cleanup_roc(struct iwl_mvm * mvm)48 static void iwl_mvm_cleanup_roc(struct iwl_mvm *mvm)
49 {
50 struct ieee80211_vif *bss_vif = iwl_mvm_get_bss_vif(mvm);
51 struct ieee80211_vif *vif = mvm->p2p_device_vif;
52
53 lockdep_assert_held(&mvm->mutex);
54
55 /*
56 * Clear the ROC_P2P_RUNNING status bit.
57 * This will cause the TX path to drop offchannel transmissions.
58 * That would also be done by mac80211, but it is racy, in particular
59 * in the case that the time event actually completed in the firmware.
60 *
61 * Also flush the offchannel queue -- this is called when the time
62 * event finishes or is canceled, so that frames queued for it
63 * won't get stuck on the queue and be transmitted in the next
64 * time event.
65 */
66 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status)) {
67 struct iwl_mvm_vif *mvmvif;
68
69 synchronize_net();
70
71 /*
72 * NB: access to this pointer would be racy, but the flush bit
73 * can only be set when we had a P2P-Device VIF, and we have a
74 * flush of this work in iwl_mvm_prepare_mac_removal() so it's
75 * not really racy.
76 */
77
78 if (!WARN_ON(!vif)) {
79 mvmvif = iwl_mvm_vif_from_mac80211(vif);
80 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
81 mvmvif->deflink.bcast_sta.tfd_queue_msk);
82
83 if (mvm->mld_api_is_used) {
84 iwl_mvm_mld_rm_bcast_sta(mvm, vif,
85 &vif->bss_conf);
86
87 iwl_mvm_link_changed(mvm, vif, &vif->bss_conf,
88 LINK_CONTEXT_MODIFY_ACTIVE,
89 false);
90 } else {
91 iwl_mvm_rm_p2p_bcast_sta(mvm, vif);
92 iwl_mvm_binding_remove_vif(mvm, vif);
93 }
94
95 /* Do not remove the PHY context as removing and adding
96 * a PHY context has timing overheads. Leaving it
97 * configured in FW would be useful in case the next ROC
98 * is with the same channel.
99 */
100 }
101 }
102
103 /*
104 * P2P AUX ROC and HS2.0 ROC do not run simultaneously.
105 * Clear the ROC_AUX_RUNNING status bit.
106 * This will cause the TX path to drop offchannel transmissions.
107 * That would also be done by mac80211, but it is racy, in particular
108 * in the case that the time event actually completed in the firmware
109 * (which is handled in iwl_mvm_te_handle_notif).
110 */
111 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) {
112 synchronize_net();
113
114 iwl_mvm_flush_sta(mvm, mvm->aux_sta.sta_id,
115 mvm->aux_sta.tfd_queue_msk);
116
117 /* In newer version of this command an aux station is added only
118 * in cases of dedicated tx queue and need to be removed in end
119 * of use. For the even newer mld api, use the appropriate
120 * function.
121 */
122 if (mvm->mld_api_is_used)
123 iwl_mvm_mld_rm_aux_sta(mvm);
124 else if (iwl_mvm_has_new_station_api(mvm->fw))
125 iwl_mvm_rm_aux_sta(mvm);
126 }
127
128 if (!IS_ERR_OR_NULL(bss_vif))
129 iwl_mvm_unblock_esr(mvm, bss_vif, IWL_MVM_ESR_BLOCKED_ROC);
130 mutex_unlock(&mvm->mutex);
131 }
132
iwl_mvm_roc_done_wk(struct work_struct * wk)133 void iwl_mvm_roc_done_wk(struct work_struct *wk)
134 {
135 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk);
136
137 mutex_lock(&mvm->mutex);
138 /* Mutex is released inside */
139 iwl_mvm_cleanup_roc(mvm);
140 }
141
iwl_mvm_roc_finished(struct iwl_mvm * mvm)142 static void iwl_mvm_roc_finished(struct iwl_mvm *mvm)
143 {
144 /*
145 * Of course, our status bit is just as racy as mac80211, so in
146 * addition, fire off the work struct which will drop all frames
147 * from the hardware queues that made it through the race. First
148 * it will of course synchronize the TX path to make sure that
149 * any *new* TX will be rejected.
150 */
151 schedule_work(&mvm->roc_done_wk);
152 }
153
iwl_mvm_csa_noa_start(struct iwl_mvm * mvm)154 static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm)
155 {
156 struct ieee80211_vif *csa_vif;
157
158 rcu_read_lock();
159
160 csa_vif = rcu_dereference(mvm->csa_vif);
161 if (!csa_vif || !csa_vif->bss_conf.csa_active)
162 goto out_unlock;
163
164 IWL_DEBUG_TE(mvm, "CSA NOA started\n");
165
166 /*
167 * CSA NoA is started but we still have beacons to
168 * transmit on the current channel.
169 * So we just do nothing here and the switch
170 * will be performed on the last TBTT.
171 */
172 if (!ieee80211_beacon_cntdwn_is_complete(csa_vif, 0)) {
173 IWL_WARN(mvm, "CSA NOA started too early\n");
174 goto out_unlock;
175 }
176
177 ieee80211_csa_finish(csa_vif, 0);
178
179 rcu_read_unlock();
180
181 RCU_INIT_POINTER(mvm->csa_vif, NULL);
182
183 return;
184
185 out_unlock:
186 rcu_read_unlock();
187 }
188
iwl_mvm_te_check_disconnect(struct iwl_mvm * mvm,struct ieee80211_vif * vif,const char * errmsg)189 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm,
190 struct ieee80211_vif *vif,
191 const char *errmsg)
192 {
193 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
194
195 if (vif->type != NL80211_IFTYPE_STATION)
196 return false;
197
198 if (!mvmvif->csa_bcn_pending && vif->cfg.assoc &&
199 vif->bss_conf.dtim_period)
200 return false;
201 if (errmsg)
202 IWL_ERR(mvm, "%s\n", errmsg);
203
204 if (mvmvif->csa_bcn_pending) {
205 struct iwl_mvm_sta *mvmsta;
206
207 rcu_read_lock();
208 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm,
209 mvmvif->deflink.ap_sta_id);
210 if (!WARN_ON(!mvmsta))
211 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
212 rcu_read_unlock();
213 }
214
215 if (vif->cfg.assoc) {
216 /*
217 * When not associated, this will be called from
218 * iwl_mvm_event_mlme_callback_ini()
219 */
220 iwl_dbg_tlv_time_point(&mvm->fwrt,
221 IWL_FW_INI_TIME_POINT_ASSOC_FAILED,
222 NULL);
223
224 mvmvif->session_prot_connection_loss = true;
225 }
226
227 iwl_mvm_connection_loss(mvm, vif, errmsg);
228 return true;
229 }
230
231 static void
iwl_mvm_te_handle_notify_csa(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data,struct iwl_time_event_notif * notif)232 iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
233 struct iwl_mvm_time_event_data *te_data,
234 struct iwl_time_event_notif *notif)
235 {
236 struct ieee80211_vif *vif = te_data->vif;
237 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
238
239 if (!notif->status)
240 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n");
241
242 switch (te_data->vif->type) {
243 case NL80211_IFTYPE_AP:
244 if (!notif->status)
245 mvmvif->csa_failed = true;
246 iwl_mvm_csa_noa_start(mvm);
247 break;
248 case NL80211_IFTYPE_STATION:
249 if (!notif->status) {
250 iwl_mvm_connection_loss(mvm, vif,
251 "CSA TE failed to start");
252 break;
253 }
254 iwl_mvm_csa_client_absent(mvm, te_data->vif);
255 cancel_delayed_work(&mvmvif->csa_work);
256 ieee80211_chswitch_done(te_data->vif, true, 0);
257 break;
258 default:
259 /* should never happen */
260 WARN_ON_ONCE(1);
261 break;
262 }
263
264 /* we don't need it anymore */
265 iwl_mvm_te_clear_data(mvm, te_data);
266 }
267
iwl_mvm_te_check_trigger(struct iwl_mvm * mvm,struct iwl_time_event_notif * notif,struct iwl_mvm_time_event_data * te_data)268 static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm,
269 struct iwl_time_event_notif *notif,
270 struct iwl_mvm_time_event_data *te_data)
271 {
272 struct iwl_fw_dbg_trigger_tlv *trig;
273 struct iwl_fw_dbg_trigger_time_event *te_trig;
274 int i;
275
276 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
277 ieee80211_vif_to_wdev(te_data->vif),
278 FW_DBG_TRIGGER_TIME_EVENT);
279 if (!trig)
280 return;
281
282 te_trig = (void *)trig->data;
283
284 for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) {
285 u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id);
286 u32 trig_action_bitmap =
287 le32_to_cpu(te_trig->time_events[i].action_bitmap);
288 u32 trig_status_bitmap =
289 le32_to_cpu(te_trig->time_events[i].status_bitmap);
290
291 if (trig_te_id != te_data->id ||
292 !(trig_action_bitmap & le32_to_cpu(notif->action)) ||
293 !(trig_status_bitmap & BIT(le32_to_cpu(notif->status))))
294 continue;
295
296 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
297 "Time event %d Action 0x%x received status: %d",
298 te_data->id,
299 le32_to_cpu(notif->action),
300 le32_to_cpu(notif->status));
301 break;
302 }
303 }
304
305 /*
306 * Handles a FW notification for an event that is known to the driver.
307 *
308 * @mvm: the mvm component
309 * @te_data: the time event data
310 * @notif: the notification data corresponding the time event data.
311 */
iwl_mvm_te_handle_notif(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data,struct iwl_time_event_notif * notif)312 static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm,
313 struct iwl_mvm_time_event_data *te_data,
314 struct iwl_time_event_notif *notif)
315 {
316 lockdep_assert_held(&mvm->time_event_lock);
317
318 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n",
319 le32_to_cpu(notif->unique_id),
320 le32_to_cpu(notif->action));
321
322 iwl_mvm_te_check_trigger(mvm, notif, te_data);
323
324 /*
325 * The FW sends the start/end time event notifications even for events
326 * that it fails to schedule. This is indicated in the status field of
327 * the notification. This happens in cases that the scheduler cannot
328 * find a schedule that can handle the event (for example requesting a
329 * P2P Device discoveribility, while there are other higher priority
330 * events in the system).
331 */
332 if (!le32_to_cpu(notif->status)) {
333 const char *msg;
334
335 if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START))
336 msg = "Time Event start notification failure";
337 else
338 msg = "Time Event end notification failure";
339
340 IWL_DEBUG_TE(mvm, "%s\n", msg);
341
342 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) {
343 iwl_mvm_te_clear_data(mvm, te_data);
344 return;
345 }
346 }
347
348 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) {
349 IWL_DEBUG_TE(mvm,
350 "TE ended - current time %lu, estimated end %lu\n",
351 jiffies, te_data->end_jiffies);
352
353 switch (te_data->vif->type) {
354 case NL80211_IFTYPE_P2P_DEVICE:
355 ieee80211_remain_on_channel_expired(mvm->hw);
356 iwl_mvm_roc_finished(mvm);
357 break;
358 case NL80211_IFTYPE_STATION:
359 /*
360 * If we are switching channel, don't disconnect
361 * if the time event is already done. Beacons can
362 * be delayed a bit after the switch.
363 */
364 if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
365 IWL_DEBUG_TE(mvm,
366 "No beacon heard and the CS time event is over, don't disconnect\n");
367 break;
368 }
369
370 /*
371 * By now, we should have finished association
372 * and know the dtim period.
373 */
374 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
375 !te_data->vif->cfg.assoc ?
376 "Not associated and the time event is over already..." :
377 "No beacon heard and the time event is over already...");
378 break;
379 default:
380 break;
381 }
382
383 iwl_mvm_te_clear_data(mvm, te_data);
384 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
385 te_data->running = true;
386 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
387
388 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
389 set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status);
390 ieee80211_ready_on_channel(mvm->hw);
391 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
392 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
393 }
394 } else {
395 IWL_WARN(mvm, "Got TE with unknown action\n");
396 }
397 }
398
399 struct iwl_mvm_rx_roc_iterator_data {
400 u32 activity;
401 bool end_activity;
402 bool found;
403 };
404
iwl_mvm_rx_roc_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)405 static void iwl_mvm_rx_roc_iterator(void *_data, u8 *mac,
406 struct ieee80211_vif *vif)
407 {
408 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
409 struct iwl_mvm_rx_roc_iterator_data *data = _data;
410
411 if (mvmvif->roc_activity == data->activity) {
412 data->found = true;
413 if (data->end_activity)
414 mvmvif->roc_activity = ROC_NUM_ACTIVITIES;
415 }
416 }
417
iwl_mvm_rx_roc_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)418 void iwl_mvm_rx_roc_notif(struct iwl_mvm *mvm,
419 struct iwl_rx_cmd_buffer *rxb)
420 {
421 struct iwl_rx_packet *pkt = rxb_addr(rxb);
422 struct iwl_roc_notif *notif = (void *)pkt->data;
423 u32 activity = le32_to_cpu(notif->activity);
424 bool started = le32_to_cpu(notif->success) &&
425 le32_to_cpu(notif->started);
426 struct iwl_mvm_rx_roc_iterator_data data = {
427 .activity = activity,
428 .end_activity = !started,
429 };
430
431 /* Clear vif roc_activity if done (set to ROC_NUM_ACTIVITIES) */
432 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
433 IEEE80211_IFACE_ITER_NORMAL,
434 iwl_mvm_rx_roc_iterator,
435 &data);
436 /*
437 * It is possible that the ROC was canceled
438 * but the notification was already fired.
439 */
440 if (!data.found)
441 return;
442
443 if (started) {
444 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
445 ieee80211_ready_on_channel(mvm->hw);
446 } else {
447 iwl_mvm_roc_finished(mvm);
448 ieee80211_remain_on_channel_expired(mvm->hw);
449 }
450 }
451
452 /*
453 * Handle A Aux ROC time event
454 */
iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm * mvm,struct iwl_time_event_notif * notif)455 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
456 struct iwl_time_event_notif *notif)
457 {
458 struct iwl_mvm_time_event_data *aux_roc_te = NULL, *te_data;
459
460 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) {
461 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
462 aux_roc_te = te_data;
463 break;
464 }
465 }
466 if (!aux_roc_te) /* Not a Aux ROC time event */
467 return -EINVAL;
468
469 iwl_mvm_te_check_trigger(mvm, notif, te_data);
470
471 IWL_DEBUG_TE(mvm,
472 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n",
473 le32_to_cpu(notif->unique_id),
474 le32_to_cpu(notif->action), le32_to_cpu(notif->status));
475
476 if (!le32_to_cpu(notif->status) ||
477 le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
478 /* End TE, notify mac80211 */
479 ieee80211_remain_on_channel_expired(mvm->hw);
480 iwl_mvm_roc_finished(mvm); /* flush aux queue */
481 list_del(&te_data->list); /* remove from list */
482 te_data->running = false;
483 te_data->vif = NULL;
484 te_data->uid = 0;
485 te_data->id = TE_MAX;
486 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
487 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
488 te_data->running = true;
489 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
490 } else {
491 IWL_DEBUG_TE(mvm,
492 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
493 le32_to_cpu(notif->action));
494 return -EINVAL;
495 }
496
497 return 0;
498 }
499
500 /*
501 * The Rx handler for time event notifications
502 */
iwl_mvm_rx_time_event_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)503 void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
504 struct iwl_rx_cmd_buffer *rxb)
505 {
506 struct iwl_rx_packet *pkt = rxb_addr(rxb);
507 struct iwl_time_event_notif *notif = (void *)pkt->data;
508 struct iwl_mvm_time_event_data *te_data, *tmp;
509
510 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
511 le32_to_cpu(notif->unique_id),
512 le32_to_cpu(notif->action));
513
514 spin_lock_bh(&mvm->time_event_lock);
515 /* This time event is triggered for Aux ROC request */
516 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
517 goto unlock;
518
519 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
520 if (le32_to_cpu(notif->unique_id) == te_data->uid)
521 iwl_mvm_te_handle_notif(mvm, te_data, notif);
522 }
523 unlock:
524 spin_unlock_bh(&mvm->time_event_lock);
525 }
526
iwl_mvm_te_notif(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)527 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
528 struct iwl_rx_packet *pkt, void *data)
529 {
530 struct iwl_mvm *mvm =
531 container_of(notif_wait, struct iwl_mvm, notif_wait);
532 struct iwl_mvm_time_event_data *te_data = data;
533 struct iwl_time_event_notif *resp;
534 int resp_len = iwl_rx_packet_payload_len(pkt);
535
536 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
537 return true;
538
539 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
540 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
541 return true;
542 }
543
544 resp = (void *)pkt->data;
545
546 /* te_data->uid is already set in the TIME_EVENT_CMD response */
547 if (le32_to_cpu(resp->unique_id) != te_data->uid)
548 return false;
549
550 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
551 te_data->uid);
552 if (!resp->status)
553 IWL_ERR(mvm,
554 "TIME_EVENT_NOTIFICATION received but not executed\n");
555
556 return true;
557 }
558
iwl_mvm_time_event_response(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)559 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
560 struct iwl_rx_packet *pkt, void *data)
561 {
562 struct iwl_mvm *mvm =
563 container_of(notif_wait, struct iwl_mvm, notif_wait);
564 struct iwl_mvm_time_event_data *te_data = data;
565 struct iwl_time_event_resp *resp;
566 int resp_len = iwl_rx_packet_payload_len(pkt);
567
568 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
569 return true;
570
571 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
572 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
573 return true;
574 }
575
576 resp = (void *)pkt->data;
577
578 /* we should never get a response to another TIME_EVENT_CMD here */
579 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
580 return false;
581
582 te_data->uid = le32_to_cpu(resp->unique_id);
583 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
584 te_data->uid);
585 return true;
586 }
587
iwl_mvm_time_event_send_add(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_time_event_data * te_data,struct iwl_time_event_cmd * te_cmd)588 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
589 struct ieee80211_vif *vif,
590 struct iwl_mvm_time_event_data *te_data,
591 struct iwl_time_event_cmd *te_cmd)
592 {
593 static const u16 time_event_response[] = { TIME_EVENT_CMD };
594 struct iwl_notification_wait wait_time_event;
595 int ret;
596
597 lockdep_assert_held(&mvm->mutex);
598
599 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
600 le32_to_cpu(te_cmd->duration));
601
602 spin_lock_bh(&mvm->time_event_lock);
603 if (WARN_ON(te_data->id != TE_MAX)) {
604 spin_unlock_bh(&mvm->time_event_lock);
605 return -EIO;
606 }
607 te_data->vif = vif;
608 te_data->duration = le32_to_cpu(te_cmd->duration);
609 te_data->id = le32_to_cpu(te_cmd->id);
610 list_add_tail(&te_data->list, &mvm->time_event_list);
611 spin_unlock_bh(&mvm->time_event_lock);
612
613 /*
614 * Use a notification wait, which really just processes the
615 * command response and doesn't wait for anything, in order
616 * to be able to process the response and get the UID inside
617 * the RX path. Using CMD_WANT_SKB doesn't work because it
618 * stores the buffer and then wakes up this thread, by which
619 * time another notification (that the time event started)
620 * might already be processed unsuccessfully.
621 */
622 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
623 time_event_response,
624 ARRAY_SIZE(time_event_response),
625 iwl_mvm_time_event_response, te_data);
626
627 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
628 sizeof(*te_cmd), te_cmd);
629 if (ret) {
630 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
631 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
632 goto out_clear_te;
633 }
634
635 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
636 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
637 /* should never fail */
638 WARN_ON_ONCE(ret);
639
640 if (ret) {
641 out_clear_te:
642 spin_lock_bh(&mvm->time_event_lock);
643 iwl_mvm_te_clear_data(mvm, te_data);
644 spin_unlock_bh(&mvm->time_event_lock);
645 }
646 return ret;
647 }
648
iwl_mvm_protect_session(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 duration,u32 min_duration,u32 max_delay,bool wait_for_notif)649 void iwl_mvm_protect_session(struct iwl_mvm *mvm,
650 struct ieee80211_vif *vif,
651 u32 duration, u32 min_duration,
652 u32 max_delay, bool wait_for_notif)
653 {
654 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
655 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
656 const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
657 struct iwl_notification_wait wait_te_notif;
658 struct iwl_time_event_cmd time_cmd = {};
659
660 lockdep_assert_held(&mvm->mutex);
661
662 if (te_data->running &&
663 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
664 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
665 jiffies_to_msecs(te_data->end_jiffies - jiffies));
666 return;
667 }
668
669 if (te_data->running) {
670 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
671 te_data->uid,
672 jiffies_to_msecs(te_data->end_jiffies - jiffies));
673 /*
674 * we don't have enough time
675 * cancel the current TE and issue a new one
676 * Of course it would be better to remove the old one only
677 * when the new one is added, but we don't care if we are off
678 * channel for a bit. All we need to do, is not to return
679 * before we actually begin to be on the channel.
680 */
681 iwl_mvm_stop_session_protection(mvm, vif);
682 }
683
684 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
685 time_cmd.id_and_color =
686 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
687 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
688
689 time_cmd.apply_time = cpu_to_le32(0);
690
691 time_cmd.max_frags = TE_V2_FRAG_NONE;
692 time_cmd.max_delay = cpu_to_le32(max_delay);
693 /* TODO: why do we need to interval = bi if it is not periodic? */
694 time_cmd.interval = cpu_to_le32(1);
695 time_cmd.duration = cpu_to_le32(duration);
696 time_cmd.repeat = 1;
697 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
698 TE_V2_NOTIF_HOST_EVENT_END |
699 TE_V2_START_IMMEDIATELY);
700
701 if (!wait_for_notif) {
702 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
703 return;
704 }
705
706 /*
707 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
708 * right after we send the time event
709 */
710 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
711 te_notif_response,
712 ARRAY_SIZE(te_notif_response),
713 iwl_mvm_te_notif, te_data);
714
715 /* If TE was sent OK - wait for the notification that started */
716 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
717 IWL_ERR(mvm, "Failed to add TE to protect session\n");
718 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
719 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
720 TU_TO_JIFFIES(max_delay))) {
721 IWL_ERR(mvm, "Failed to protect session until TE\n");
722 }
723 }
724
725 /* Determine whether mac or link id should be used, and validate the link id */
iwl_mvm_get_session_prot_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,s8 link_id)726 static int iwl_mvm_get_session_prot_id(struct iwl_mvm *mvm,
727 struct ieee80211_vif *vif,
728 s8 link_id)
729 {
730 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
731 int ver = iwl_fw_lookup_cmd_ver(mvm->fw,
732 WIDE_ID(MAC_CONF_GROUP,
733 SESSION_PROTECTION_CMD), 1);
734
735 if (ver < 2)
736 return mvmvif->id;
737
738 if (WARN(link_id < 0 || !mvmvif->link[link_id],
739 "Invalid link ID for session protection: %u\n", link_id))
740 return -EINVAL;
741
742 if (WARN(!mvmvif->link[link_id]->active,
743 "Session Protection on an inactive link: %u\n", link_id))
744 return -EINVAL;
745
746 return mvmvif->link[link_id]->fw_link_id;
747 }
748
iwl_mvm_cancel_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 id,s8 link_id)749 static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm,
750 struct ieee80211_vif *vif,
751 u32 id, s8 link_id)
752 {
753 int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, link_id);
754 struct iwl_session_prot_cmd cmd = {
755 .id_and_color = cpu_to_le32(mac_link_id),
756 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
757 .conf_id = cpu_to_le32(id),
758 };
759 int ret;
760
761 if (mac_link_id < 0)
762 return;
763
764 ret = iwl_mvm_send_cmd_pdu(mvm,
765 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
766 0, sizeof(cmd), &cmd);
767 if (ret)
768 IWL_ERR(mvm,
769 "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret);
770 }
771
iwl_mvm_roc_rm_cmd(struct iwl_mvm * mvm,u32 activity)772 static void iwl_mvm_roc_rm_cmd(struct iwl_mvm *mvm, u32 activity)
773 {
774 struct iwl_roc_req roc_cmd = {
775 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
776 .activity = cpu_to_le32(activity),
777 };
778 int ret;
779
780 lockdep_assert_held(&mvm->mutex);
781 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0,
782 sizeof(roc_cmd), &roc_cmd);
783 if (ret)
784 IWL_ERR(mvm, "Couldn't send the ROC_CMD: %d\n", ret);
785 }
786
__iwl_mvm_remove_time_event(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data,u32 * uid)787 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
788 struct iwl_mvm_time_event_data *te_data,
789 u32 *uid)
790 {
791 u32 id;
792 struct ieee80211_vif *vif = te_data->vif;
793 struct iwl_mvm_vif *mvmvif;
794 enum nl80211_iftype iftype;
795 s8 link_id;
796 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
797 u8 roc_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
798 WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0);
799
800 if (!vif)
801 return false;
802
803 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
804 iftype = te_data->vif->type;
805
806 /*
807 * It is possible that by the time we got to this point the time
808 * event was already removed.
809 */
810 spin_lock_bh(&mvm->time_event_lock);
811
812 /* Save time event uid before clearing its data */
813 *uid = te_data->uid;
814 id = te_data->id;
815 link_id = te_data->link_id;
816
817 /*
818 * The clear_data function handles time events that were already removed
819 */
820 iwl_mvm_te_clear_data(mvm, te_data);
821 spin_unlock_bh(&mvm->time_event_lock);
822
823 if ((p2p_aux && iftype == NL80211_IFTYPE_P2P_DEVICE) ||
824 (roc_ver >= 3 && mvmvif->roc_activity == ROC_ACTIVITY_HOTSPOT)) {
825 if (mvmvif->roc_activity < ROC_NUM_ACTIVITIES) {
826 iwl_mvm_roc_rm_cmd(mvm, mvmvif->roc_activity);
827 mvmvif->roc_activity = ROC_NUM_ACTIVITIES;
828 iwl_mvm_roc_finished(mvm);
829 }
830 return false;
831 } else if (fw_has_capa(&mvm->fw->ucode_capa,
832 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD) &&
833 id != HOT_SPOT_CMD) {
834 /* When session protection is used, the te_data->id field
835 * is reused to save session protection's configuration.
836 * For AUX ROC, HOT_SPOT_CMD is used and the te_data->id
837 * field is set to HOT_SPOT_CMD.
838 */
839 if (mvmvif && id < SESSION_PROTECT_CONF_MAX_ID) {
840 /* Session protection is still ongoing. Cancel it */
841 iwl_mvm_cancel_session_protection(mvm, vif, id,
842 link_id);
843 if (iftype == NL80211_IFTYPE_P2P_DEVICE) {
844 iwl_mvm_roc_finished(mvm);
845 }
846 }
847 return false;
848 } else {
849 /* It is possible that by the time we try to remove it, the
850 * time event has already ended and removed. In such a case
851 * there is no need to send a removal command.
852 */
853 if (id == TE_MAX) {
854 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
855 return false;
856 }
857 }
858
859 return true;
860 }
861
862 /*
863 * Explicit request to remove a aux roc time event. The removal of a time
864 * event needs to be synchronized with the flow of a time event's end
865 * notification, which also removes the time event from the op mode
866 * data structures.
867 */
iwl_mvm_remove_aux_roc_te(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_time_event_data * te_data)868 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
869 struct iwl_mvm_vif *mvmvif,
870 struct iwl_mvm_time_event_data *te_data)
871 {
872 struct iwl_hs20_roc_req aux_cmd = {};
873 u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm);
874
875 u32 uid;
876 int ret;
877
878 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
879 return;
880
881 aux_cmd.event_unique_id = cpu_to_le32(uid);
882 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
883 aux_cmd.id_and_color =
884 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
885 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
886 le32_to_cpu(aux_cmd.event_unique_id));
887 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
888 len, &aux_cmd);
889
890 if (WARN_ON(ret))
891 return;
892 }
893
894 /*
895 * Explicit request to remove a time event. The removal of a time event needs to
896 * be synchronized with the flow of a time event's end notification, which also
897 * removes the time event from the op mode data structures.
898 */
iwl_mvm_remove_time_event(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_time_event_data * te_data)899 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
900 struct iwl_mvm_vif *mvmvif,
901 struct iwl_mvm_time_event_data *te_data)
902 {
903 struct iwl_time_event_cmd time_cmd = {};
904 u32 uid;
905 int ret;
906
907 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
908 return;
909
910 /* When we remove a TE, the UID is to be set in the id field */
911 time_cmd.id = cpu_to_le32(uid);
912 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
913 time_cmd.id_and_color =
914 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
915
916 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
917 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
918 sizeof(time_cmd), &time_cmd);
919 if (ret)
920 IWL_ERR(mvm, "Couldn't remove the time event\n");
921 }
922
iwl_mvm_stop_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif)923 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
924 struct ieee80211_vif *vif)
925 {
926 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
927 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
928 u32 id;
929
930 lockdep_assert_held(&mvm->mutex);
931
932 spin_lock_bh(&mvm->time_event_lock);
933 id = te_data->id;
934 spin_unlock_bh(&mvm->time_event_lock);
935
936 if (fw_has_capa(&mvm->fw->ucode_capa,
937 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
938 if (id != SESSION_PROTECT_CONF_ASSOC) {
939 IWL_DEBUG_TE(mvm,
940 "don't remove session protection id=%u\n",
941 id);
942 return;
943 }
944 } else if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) {
945 IWL_DEBUG_TE(mvm,
946 "don't remove TE with id=%u (not session protection)\n",
947 id);
948 return;
949 }
950
951 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
952 }
953
iwl_mvm_rx_session_protect_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)954 void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm,
955 struct iwl_rx_cmd_buffer *rxb)
956 {
957 struct iwl_rx_packet *pkt = rxb_addr(rxb);
958 struct iwl_session_prot_notif *notif = (void *)pkt->data;
959 unsigned int ver =
960 iwl_fw_lookup_notif_ver(mvm->fw, MAC_CONF_GROUP,
961 SESSION_PROTECTION_NOTIF, 2);
962 int id = le32_to_cpu(notif->mac_link_id);
963 struct ieee80211_vif *vif;
964 struct iwl_mvm_vif *mvmvif;
965 unsigned int notif_link_id;
966
967 rcu_read_lock();
968
969 if (ver <= 2) {
970 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
971 } else {
972 struct ieee80211_bss_conf *link_conf =
973 iwl_mvm_rcu_fw_link_id_to_link_conf(mvm, id, true);
974
975 if (!link_conf)
976 goto out_unlock;
977
978 notif_link_id = link_conf->link_id;
979 vif = link_conf->vif;
980 }
981
982 if (!vif)
983 goto out_unlock;
984
985 mvmvif = iwl_mvm_vif_from_mac80211(vif);
986
987 if (WARN(ver > 2 && mvmvif->time_event_data.link_id >= 0 &&
988 mvmvif->time_event_data.link_id != notif_link_id,
989 "SESSION_PROTECTION_NOTIF was received for link %u, while the current time event is on link %u\n",
990 notif_link_id, mvmvif->time_event_data.link_id))
991 goto out_unlock;
992
993 /* The vif is not a P2P_DEVICE, maintain its time_event_data */
994 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
995 struct iwl_mvm_time_event_data *te_data =
996 &mvmvif->time_event_data;
997
998 if (!le32_to_cpu(notif->status)) {
999 iwl_mvm_te_check_disconnect(mvm, vif,
1000 "Session protection failure");
1001 spin_lock_bh(&mvm->time_event_lock);
1002 iwl_mvm_te_clear_data(mvm, te_data);
1003 spin_unlock_bh(&mvm->time_event_lock);
1004 }
1005
1006 if (le32_to_cpu(notif->start)) {
1007 spin_lock_bh(&mvm->time_event_lock);
1008 te_data->running = le32_to_cpu(notif->start);
1009 te_data->end_jiffies =
1010 TU_TO_EXP_TIME(te_data->duration);
1011 spin_unlock_bh(&mvm->time_event_lock);
1012 } else {
1013 /*
1014 * By now, we should have finished association
1015 * and know the dtim period.
1016 */
1017 iwl_mvm_te_check_disconnect(mvm, vif,
1018 !vif->cfg.assoc ?
1019 "Not associated and the session protection is over already..." :
1020 "No beacon heard and the session protection is over already...");
1021 spin_lock_bh(&mvm->time_event_lock);
1022 iwl_mvm_te_clear_data(mvm, te_data);
1023 spin_unlock_bh(&mvm->time_event_lock);
1024 }
1025
1026 goto out_unlock;
1027 }
1028
1029 if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) {
1030 /* End TE, notify mac80211 */
1031 mvmvif->time_event_data.id = SESSION_PROTECT_CONF_MAX_ID;
1032 mvmvif->time_event_data.link_id = -1;
1033 /* set the bit so the ROC cleanup will actually clean up */
1034 set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status);
1035 iwl_mvm_roc_finished(mvm);
1036 ieee80211_remain_on_channel_expired(mvm->hw);
1037 } else if (le32_to_cpu(notif->start)) {
1038 if (WARN_ON(mvmvif->time_event_data.id !=
1039 le32_to_cpu(notif->conf_id)))
1040 goto out_unlock;
1041 set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status);
1042 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
1043 }
1044
1045 out_unlock:
1046 rcu_read_unlock();
1047 }
1048
1049 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
1050 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
1051 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
1052 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
1053 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
1054
iwl_mvm_roc_duration_and_delay(struct ieee80211_vif * vif,u32 duration_ms,u32 * duration_tu,u32 * delay)1055 void iwl_mvm_roc_duration_and_delay(struct ieee80211_vif *vif,
1056 u32 duration_ms,
1057 u32 *duration_tu,
1058 u32 *delay)
1059 {
1060 struct ieee80211_bss_conf *link_conf;
1061 unsigned int link_id;
1062 u32 dtim_interval = 0;
1063
1064 *delay = AUX_ROC_MIN_DELAY;
1065 *duration_tu = MSEC_TO_TU(duration_ms);
1066
1067 rcu_read_lock();
1068 for_each_vif_active_link(vif, link_conf, link_id) {
1069 dtim_interval =
1070 max_t(u32, dtim_interval,
1071 link_conf->dtim_period * link_conf->beacon_int);
1072 }
1073 rcu_read_unlock();
1074
1075 /*
1076 * If we are associated we want the delay time to be at least one
1077 * dtim interval so that the FW can wait until after the DTIM and
1078 * then start the time event, this will potentially allow us to
1079 * remain off-channel for the max duration.
1080 * Since we want to use almost a whole dtim interval we would also
1081 * like the delay to be for 2-3 dtim intervals, in case there are
1082 * other time events with higher priority.
1083 * dtim_interval should never be 0, it can be 1 if we don't know it
1084 * (we haven't heard any beacon yet).
1085 */
1086 if (vif->cfg.assoc && !WARN_ON(!dtim_interval)) {
1087 *delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
1088 /* We cannot remain off-channel longer than the DTIM interval */
1089 if (dtim_interval <= *duration_tu) {
1090 *duration_tu = dtim_interval - AUX_ROC_SAFETY_BUFFER;
1091 if (*duration_tu <= AUX_ROC_MIN_DURATION)
1092 *duration_tu = dtim_interval -
1093 AUX_ROC_MIN_SAFETY_BUFFER;
1094 }
1095 }
1096 }
1097
iwl_mvm_roc_add_cmd(struct iwl_mvm * mvm,struct ieee80211_channel * channel,struct ieee80211_vif * vif,int duration,enum iwl_roc_activity activity)1098 int iwl_mvm_roc_add_cmd(struct iwl_mvm *mvm,
1099 struct ieee80211_channel *channel,
1100 struct ieee80211_vif *vif,
1101 int duration, enum iwl_roc_activity activity)
1102 {
1103 int res;
1104 u32 duration_tu, delay;
1105 struct iwl_roc_req roc_req = {
1106 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1107 .activity = cpu_to_le32(activity),
1108 .sta_id = cpu_to_le32(mvm->aux_sta.sta_id),
1109 };
1110 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1111
1112 lockdep_assert_held(&mvm->mutex);
1113
1114 if (WARN_ON(mvmvif->roc_activity != ROC_NUM_ACTIVITIES))
1115 return -EBUSY;
1116
1117 /* Set the channel info data */
1118 iwl_mvm_set_chan_info(mvm, &roc_req.channel_info,
1119 channel->hw_value,
1120 iwl_mvm_phy_band_from_nl80211(channel->band),
1121 IWL_PHY_CHANNEL_MODE20, 0);
1122
1123 iwl_mvm_roc_duration_and_delay(vif, duration, &duration_tu,
1124 &delay);
1125 roc_req.duration = cpu_to_le32(duration_tu);
1126 roc_req.max_delay = cpu_to_le32(delay);
1127
1128 IWL_DEBUG_TE(mvm,
1129 "\t(requested = %ums, max_delay = %ums)\n",
1130 duration, delay);
1131 IWL_DEBUG_TE(mvm,
1132 "Requesting to remain on channel %u for %utu. activity %u\n",
1133 channel->hw_value, duration_tu, activity);
1134
1135 /* Set the node address */
1136 memcpy(roc_req.node_addr, vif->addr, ETH_ALEN);
1137
1138 res = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, ROC_CMD),
1139 0, sizeof(roc_req), &roc_req);
1140 if (!res)
1141 mvmvif->roc_activity = activity;
1142
1143 return res;
1144 }
1145
1146 static int
iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif,int duration,enum ieee80211_roc_type type)1147 iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm,
1148 struct ieee80211_vif *vif,
1149 int duration,
1150 enum ieee80211_roc_type type)
1151 {
1152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1153 struct iwl_session_prot_cmd cmd = {
1154 .id_and_color =
1155 cpu_to_le32(iwl_mvm_get_session_prot_id(mvm, vif, 0)),
1156 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1157 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1158 };
1159
1160 lockdep_assert_held(&mvm->mutex);
1161
1162 /* The time_event_data.id field is reused to save session
1163 * protection's configuration.
1164 */
1165
1166 mvmvif->time_event_data.link_id = 0;
1167
1168 switch (type) {
1169 case IEEE80211_ROC_TYPE_NORMAL:
1170 mvmvif->time_event_data.id =
1171 SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV;
1172 break;
1173 case IEEE80211_ROC_TYPE_MGMT_TX:
1174 mvmvif->time_event_data.id =
1175 SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION;
1176 break;
1177 default:
1178 WARN_ONCE(1, "Got an invalid ROC type\n");
1179 return -EINVAL;
1180 }
1181
1182 cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id);
1183 return iwl_mvm_send_cmd_pdu(mvm,
1184 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1185 0, sizeof(cmd), &cmd);
1186 }
1187
iwl_mvm_start_p2p_roc(struct iwl_mvm * mvm,struct ieee80211_vif * vif,int duration,enum ieee80211_roc_type type)1188 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1189 int duration, enum ieee80211_roc_type type)
1190 {
1191 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1192 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1193 struct iwl_time_event_cmd time_cmd = {};
1194
1195 lockdep_assert_held(&mvm->mutex);
1196 if (te_data->running) {
1197 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
1198 return -EBUSY;
1199 }
1200
1201 if (fw_has_capa(&mvm->fw->ucode_capa,
1202 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
1203 return iwl_mvm_start_p2p_roc_session_protection(mvm, vif,
1204 duration,
1205 type);
1206
1207 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1208 time_cmd.id_and_color =
1209 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1210
1211 switch (type) {
1212 case IEEE80211_ROC_TYPE_NORMAL:
1213 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
1214 break;
1215 case IEEE80211_ROC_TYPE_MGMT_TX:
1216 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
1217 break;
1218 default:
1219 WARN_ONCE(1, "Got an invalid ROC type\n");
1220 return -EINVAL;
1221 }
1222
1223 time_cmd.apply_time = cpu_to_le32(0);
1224 time_cmd.interval = cpu_to_le32(1);
1225
1226 /*
1227 * The P2P Device TEs can have lower priority than other events
1228 * that are being scheduled by the driver/fw, and thus it might not be
1229 * scheduled. To improve the chances of it being scheduled, allow them
1230 * to be fragmented, and in addition allow them to be delayed.
1231 */
1232 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
1233 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
1234 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
1235 time_cmd.repeat = 1;
1236 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1237 TE_V2_NOTIF_HOST_EVENT_END |
1238 TE_V2_START_IMMEDIATELY);
1239
1240 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1241 }
1242
iwl_mvm_get_roc_te(struct iwl_mvm * mvm)1243 static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm)
1244 {
1245 struct iwl_mvm_time_event_data *te_data;
1246
1247 lockdep_assert_held(&mvm->mutex);
1248
1249 spin_lock_bh(&mvm->time_event_lock);
1250
1251 /*
1252 * Iterate over the list of time events and find the time event that is
1253 * associated with a P2P_DEVICE interface.
1254 * This assumes that a P2P_DEVICE interface can have only a single time
1255 * event at any given time and this time event coresponds to a ROC
1256 * request
1257 */
1258 list_for_each_entry(te_data, &mvm->time_event_list, list) {
1259 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE)
1260 goto out;
1261 }
1262
1263 /* There can only be at most one AUX ROC time event, we just use the
1264 * list to simplify/unify code. Remove it if it exists.
1265 */
1266 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list,
1267 struct iwl_mvm_time_event_data,
1268 list);
1269 out:
1270 spin_unlock_bh(&mvm->time_event_lock);
1271 return te_data;
1272 }
1273
iwl_mvm_cleanup_roc_te(struct iwl_mvm * mvm)1274 void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm)
1275 {
1276 struct iwl_mvm_time_event_data *te_data;
1277 u32 uid;
1278
1279 te_data = iwl_mvm_get_roc_te(mvm);
1280 if (te_data)
1281 __iwl_mvm_remove_time_event(mvm, te_data, &uid);
1282 }
1283
iwl_mvm_stop_roc(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1284 void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1285 {
1286 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1287 struct iwl_mvm_time_event_data *te_data;
1288 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
1289 u8 roc_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
1290 WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0);
1291 int iftype = vif->type;
1292
1293 mutex_lock(&mvm->mutex);
1294
1295 if (p2p_aux || (roc_ver >= 3 && iftype != NL80211_IFTYPE_P2P_DEVICE)) {
1296 if (mvmvif->roc_activity < ROC_NUM_ACTIVITIES) {
1297 iwl_mvm_roc_rm_cmd(mvm, mvmvif->roc_activity);
1298 mvmvif->roc_activity = ROC_NUM_ACTIVITIES;
1299 }
1300 goto cleanup_roc;
1301 } else if (fw_has_capa(&mvm->fw->ucode_capa,
1302 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
1303 te_data = &mvmvif->time_event_data;
1304
1305 if (iftype == NL80211_IFTYPE_P2P_DEVICE) {
1306 if (te_data->id >= SESSION_PROTECT_CONF_MAX_ID) {
1307 IWL_DEBUG_TE(mvm,
1308 "No remain on channel event\n");
1309 mutex_unlock(&mvm->mutex);
1310 return;
1311 }
1312 iwl_mvm_cancel_session_protection(mvm, vif,
1313 te_data->id,
1314 te_data->link_id);
1315 } else {
1316 iwl_mvm_remove_aux_roc_te(mvm, mvmvif,
1317 &mvmvif->hs_time_event_data);
1318 }
1319 goto cleanup_roc;
1320 }
1321
1322 te_data = iwl_mvm_get_roc_te(mvm);
1323 if (!te_data) {
1324 IWL_WARN(mvm, "No remain on channel event\n");
1325 mutex_unlock(&mvm->mutex);
1326 return;
1327 }
1328
1329 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
1330 iftype = te_data->vif->type;
1331 if (iftype == NL80211_IFTYPE_P2P_DEVICE)
1332 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1333 else
1334 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
1335
1336 cleanup_roc:
1337 /*
1338 * In case we get here before the ROC event started,
1339 * (so the status bit isn't set) set it here so iwl_mvm_cleanup_roc will
1340 * cleanup things properly
1341 */
1342 if (p2p_aux || iftype != NL80211_IFTYPE_P2P_DEVICE)
1343 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
1344 else
1345 set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status);
1346
1347 /* Mutex is released inside this function */
1348 iwl_mvm_cleanup_roc(mvm);
1349 }
1350
iwl_mvm_remove_csa_period(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1351 void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm,
1352 struct ieee80211_vif *vif)
1353 {
1354 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1355 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1356 u32 id;
1357
1358 lockdep_assert_held(&mvm->mutex);
1359
1360 spin_lock_bh(&mvm->time_event_lock);
1361 id = te_data->id;
1362 spin_unlock_bh(&mvm->time_event_lock);
1363
1364 if (id != TE_CHANNEL_SWITCH_PERIOD)
1365 return;
1366
1367 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1368 }
1369
iwl_mvm_schedule_csa_period(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 duration,u32 apply_time)1370 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
1371 struct ieee80211_vif *vif,
1372 u32 duration, u32 apply_time)
1373 {
1374 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1375 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1376 struct iwl_time_event_cmd time_cmd = {};
1377
1378 lockdep_assert_held(&mvm->mutex);
1379
1380 if (te_data->running) {
1381 u32 id;
1382
1383 spin_lock_bh(&mvm->time_event_lock);
1384 id = te_data->id;
1385 spin_unlock_bh(&mvm->time_event_lock);
1386
1387 if (id == TE_CHANNEL_SWITCH_PERIOD) {
1388 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
1389 return -EBUSY;
1390 }
1391
1392 /*
1393 * Remove the session protection time event to allow the
1394 * channel switch. If we got here, we just heard a beacon so
1395 * the session protection is not needed anymore anyway.
1396 */
1397 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1398 }
1399
1400 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1401 time_cmd.id_and_color =
1402 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1403 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
1404 time_cmd.apply_time = cpu_to_le32(apply_time);
1405 time_cmd.max_frags = TE_V2_FRAG_NONE;
1406 time_cmd.duration = cpu_to_le32(duration);
1407 time_cmd.repeat = 1;
1408 time_cmd.interval = cpu_to_le32(1);
1409 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1410 TE_V2_ABSENCE);
1411 if (!apply_time)
1412 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY);
1413
1414 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1415 }
1416
iwl_mvm_session_prot_notif(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)1417 static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait,
1418 struct iwl_rx_packet *pkt, void *data)
1419 {
1420 struct iwl_mvm *mvm =
1421 container_of(notif_wait, struct iwl_mvm, notif_wait);
1422 struct iwl_session_prot_notif *resp;
1423 int resp_len = iwl_rx_packet_payload_len(pkt);
1424
1425 if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF ||
1426 pkt->hdr.group_id != MAC_CONF_GROUP))
1427 return true;
1428
1429 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
1430 IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n");
1431 return true;
1432 }
1433
1434 resp = (void *)pkt->data;
1435
1436 if (!resp->status)
1437 IWL_ERR(mvm,
1438 "TIME_EVENT_NOTIFICATION received but not executed\n");
1439
1440 return true;
1441 }
1442
iwl_mvm_schedule_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 duration,u32 min_duration,bool wait_for_notif,unsigned int link_id)1443 void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
1444 struct ieee80211_vif *vif,
1445 u32 duration, u32 min_duration,
1446 bool wait_for_notif,
1447 unsigned int link_id)
1448 {
1449 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1450 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1451 const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) };
1452 struct iwl_notification_wait wait_notif;
1453 int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, (s8)link_id);
1454 struct iwl_session_prot_cmd cmd = {
1455 .id_and_color = cpu_to_le32(mac_link_id),
1456 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1457 .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC),
1458 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1459 };
1460
1461 if (mac_link_id < 0)
1462 return;
1463
1464 lockdep_assert_held(&mvm->mutex);
1465
1466 spin_lock_bh(&mvm->time_event_lock);
1467 if (te_data->running && te_data->link_id == link_id &&
1468 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
1469 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
1470 jiffies_to_msecs(te_data->end_jiffies - jiffies));
1471 spin_unlock_bh(&mvm->time_event_lock);
1472
1473 return;
1474 }
1475
1476 iwl_mvm_te_clear_data(mvm, te_data);
1477 /*
1478 * The time_event_data.id field is reused to save session
1479 * protection's configuration.
1480 */
1481 te_data->id = le32_to_cpu(cmd.conf_id);
1482 te_data->duration = le32_to_cpu(cmd.duration_tu);
1483 te_data->vif = vif;
1484 te_data->link_id = link_id;
1485 spin_unlock_bh(&mvm->time_event_lock);
1486
1487 IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n",
1488 le32_to_cpu(cmd.duration_tu));
1489
1490 if (!wait_for_notif) {
1491 if (iwl_mvm_send_cmd_pdu(mvm,
1492 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1493 0, sizeof(cmd), &cmd)) {
1494 goto send_cmd_err;
1495 }
1496
1497 return;
1498 }
1499
1500 iwl_init_notification_wait(&mvm->notif_wait, &wait_notif,
1501 notif, ARRAY_SIZE(notif),
1502 iwl_mvm_session_prot_notif, NULL);
1503
1504 if (iwl_mvm_send_cmd_pdu(mvm,
1505 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1506 0, sizeof(cmd), &cmd)) {
1507 iwl_remove_notification(&mvm->notif_wait, &wait_notif);
1508 goto send_cmd_err;
1509 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif,
1510 TU_TO_JIFFIES(100))) {
1511 IWL_ERR(mvm,
1512 "Failed to protect session until session protection\n");
1513 }
1514 return;
1515
1516 send_cmd_err:
1517 IWL_ERR(mvm,
1518 "Couldn't send the SESSION_PROTECTION_CMD\n");
1519 spin_lock_bh(&mvm->time_event_lock);
1520 iwl_mvm_te_clear_data(mvm, te_data);
1521 spin_unlock_bh(&mvm->time_event_lock);
1522 }
1523