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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
25void 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
48void iwl_mvm_roc_done_wk(struct work_struct *wk)
49{
50 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk);
51
52 /*
53 * Clear the ROC_RUNNING status bit.
54 * This will cause the TX path to drop offchannel transmissions.
55 * That would also be done by mac80211, but it is racy, in particular
56 * in the case that the time event actually completed in the firmware
57 * (which is handled in iwl_mvm_te_handle_notif).
58 */
59 clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
60
61 synchronize_net();
62
63 /*
64 * Flush the offchannel queue -- this is called when the time
65 * event finishes or is canceled, so that frames queued for it
66 * won't get stuck on the queue and be transmitted in the next
67 * time event.
68 */
69
70 mutex_lock(&mvm->mutex);
71 if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) {
72 struct iwl_mvm_vif *mvmvif;
73
74 /*
75 * NB: access to this pointer would be racy, but the flush bit
76 * can only be set when we had a P2P-Device VIF, and we have a
77 * flush of this work in iwl_mvm_prepare_mac_removal() so it's
78 * not really racy.
79 */
80
81 if (!WARN_ON(!mvm->p2p_device_vif)) {
82 struct ieee80211_vif *vif = mvm->p2p_device_vif;
83
84 mvmvif = iwl_mvm_vif_from_mac80211(vif);
85 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
86 mvmvif->deflink.bcast_sta.tfd_queue_msk);
87
88 if (mvm->mld_api_is_used) {
89 iwl_mvm_mld_rm_bcast_sta(mvm, vif,
90 &vif->bss_conf);
91
92 iwl_mvm_link_changed(mvm, vif, &vif->bss_conf,
93 LINK_CONTEXT_MODIFY_ACTIVE,
94 false);
95 } else {
96 iwl_mvm_rm_p2p_bcast_sta(mvm, vif);
97 iwl_mvm_binding_remove_vif(mvm, vif);
98 }
99
100 /* Do not remove the PHY context as removing and adding
101 * a PHY context has timing overheads. Leaving it
102 * configured in FW would be useful in case the next ROC
103 * is with the same channel.
104 */
105 }
106 }
107
108 /*
109 * Clear the ROC_AUX_RUNNING status bit.
110 * This will cause the TX path to drop offchannel transmissions.
111 * That would also be done by mac80211, but it is racy, in particular
112 * in the case that the time event actually completed in the firmware
113 * (which is handled in iwl_mvm_te_handle_notif).
114 */
115 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) {
116 /* do the same in case of hot spot 2.0 */
117 iwl_mvm_flush_sta(mvm, mvm->aux_sta.sta_id,
118 mvm->aux_sta.tfd_queue_msk);
119
120 if (mvm->mld_api_is_used) {
121 iwl_mvm_mld_rm_aux_sta(mvm);
122 goto out_unlock;
123 }
124
125 /* In newer version of this command an aux station is added only
126 * in cases of dedicated tx queue and need to be removed in end
127 * of use */
128 if (iwl_mvm_has_new_station_api(mvm->fw))
129 iwl_mvm_rm_aux_sta(mvm);
130 }
131
132out_unlock:
133 mutex_unlock(&mvm->mutex);
134}
135
136static void iwl_mvm_roc_finished(struct iwl_mvm *mvm)
137{
138 /*
139 * Of course, our status bit is just as racy as mac80211, so in
140 * addition, fire off the work struct which will drop all frames
141 * from the hardware queues that made it through the race. First
142 * it will of course synchronize the TX path to make sure that
143 * any *new* TX will be rejected.
144 */
145 schedule_work(&mvm->roc_done_wk);
146}
147
148static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm)
149{
150 struct ieee80211_vif *csa_vif;
151
152 rcu_read_lock();
153
154 csa_vif = rcu_dereference(mvm->csa_vif);
155 if (!csa_vif || !csa_vif->bss_conf.csa_active)
156 goto out_unlock;
157
158 IWL_DEBUG_TE(mvm, "CSA NOA started\n");
159
160 /*
161 * CSA NoA is started but we still have beacons to
162 * transmit on the current channel.
163 * So we just do nothing here and the switch
164 * will be performed on the last TBTT.
165 */
166 if (!ieee80211_beacon_cntdwn_is_complete(csa_vif)) {
167 IWL_WARN(mvm, "CSA NOA started too early\n");
168 goto out_unlock;
169 }
170
171 ieee80211_csa_finish(csa_vif);
172
173 rcu_read_unlock();
174
175 RCU_INIT_POINTER(mvm->csa_vif, NULL);
176
177 return;
178
179out_unlock:
180 rcu_read_unlock();
181}
182
183static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm,
184 struct ieee80211_vif *vif,
185 const char *errmsg)
186{
187 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
188
189 if (vif->type != NL80211_IFTYPE_STATION)
190 return false;
191
192 if (!mvmvif->csa_bcn_pending && vif->cfg.assoc &&
193 vif->bss_conf.dtim_period)
194 return false;
195 if (errmsg)
196 IWL_ERR(mvm, "%s\n", errmsg);
197
198 if (mvmvif->csa_bcn_pending) {
199 struct iwl_mvm_sta *mvmsta;
200
201 rcu_read_lock();
202 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm,
203 mvmvif->deflink.ap_sta_id);
204 if (!WARN_ON(!mvmsta))
205 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
206 rcu_read_unlock();
207 }
208
209 if (vif->cfg.assoc) {
210 /*
211 * When not associated, this will be called from
212 * iwl_mvm_event_mlme_callback_ini()
213 */
214 iwl_dbg_tlv_time_point(&mvm->fwrt,
215 IWL_FW_INI_TIME_POINT_ASSOC_FAILED,
216 NULL);
217 }
218
219 iwl_mvm_connection_loss(mvm, vif, errmsg);
220 return true;
221}
222
223static void
224iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
225 struct iwl_mvm_time_event_data *te_data,
226 struct iwl_time_event_notif *notif)
227{
228 struct ieee80211_vif *vif = te_data->vif;
229 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
230
231 if (!notif->status)
232 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n");
233
234 switch (te_data->vif->type) {
235 case NL80211_IFTYPE_AP:
236 if (!notif->status)
237 mvmvif->csa_failed = true;
238 iwl_mvm_csa_noa_start(mvm);
239 break;
240 case NL80211_IFTYPE_STATION:
241 if (!notif->status) {
242 iwl_mvm_connection_loss(mvm, vif,
243 "CSA TE failed to start");
244 break;
245 }
246 iwl_mvm_csa_client_absent(mvm, te_data->vif);
247 cancel_delayed_work(&mvmvif->csa_work);
248 ieee80211_chswitch_done(te_data->vif, true, 0);
249 break;
250 default:
251 /* should never happen */
252 WARN_ON_ONCE(1);
253 break;
254 }
255
256 /* we don't need it anymore */
257 iwl_mvm_te_clear_data(mvm, te_data);
258}
259
260static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm,
261 struct iwl_time_event_notif *notif,
262 struct iwl_mvm_time_event_data *te_data)
263{
264 struct iwl_fw_dbg_trigger_tlv *trig;
265 struct iwl_fw_dbg_trigger_time_event *te_trig;
266 int i;
267
268 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
269 ieee80211_vif_to_wdev(te_data->vif),
270 FW_DBG_TRIGGER_TIME_EVENT);
271 if (!trig)
272 return;
273
274 te_trig = (void *)trig->data;
275
276 for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) {
277 u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id);
278 u32 trig_action_bitmap =
279 le32_to_cpu(te_trig->time_events[i].action_bitmap);
280 u32 trig_status_bitmap =
281 le32_to_cpu(te_trig->time_events[i].status_bitmap);
282
283 if (trig_te_id != te_data->id ||
284 !(trig_action_bitmap & le32_to_cpu(notif->action)) ||
285 !(trig_status_bitmap & BIT(le32_to_cpu(notif->status))))
286 continue;
287
288 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
289 "Time event %d Action 0x%x received status: %d",
290 te_data->id,
291 le32_to_cpu(notif->action),
292 le32_to_cpu(notif->status));
293 break;
294 }
295}
296
297static void iwl_mvm_p2p_roc_finished(struct iwl_mvm *mvm)
298{
299 /*
300 * If the IWL_MVM_STATUS_NEED_FLUSH_P2P is already set, then the
301 * roc_done_wk is already scheduled or running, so don't schedule it
302 * again to avoid a race where the roc_done_wk clears this bit after
303 * it is set here, affecting the next run of the roc_done_wk.
304 */
305 if (!test_and_set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status))
306 iwl_mvm_roc_finished(mvm);
307}
308
309/*
310 * Handles a FW notification for an event that is known to the driver.
311 *
312 * @mvm: the mvm component
313 * @te_data: the time event data
314 * @notif: the notification data corresponding the time event data.
315 */
316static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm,
317 struct iwl_mvm_time_event_data *te_data,
318 struct iwl_time_event_notif *notif)
319{
320 lockdep_assert_held(&mvm->time_event_lock);
321
322 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n",
323 le32_to_cpu(notif->unique_id),
324 le32_to_cpu(notif->action));
325
326 iwl_mvm_te_check_trigger(mvm, notif, te_data);
327
328 /*
329 * The FW sends the start/end time event notifications even for events
330 * that it fails to schedule. This is indicated in the status field of
331 * the notification. This happens in cases that the scheduler cannot
332 * find a schedule that can handle the event (for example requesting a
333 * P2P Device discoveribility, while there are other higher priority
334 * events in the system).
335 */
336 if (!le32_to_cpu(notif->status)) {
337 const char *msg;
338
339 if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START))
340 msg = "Time Event start notification failure";
341 else
342 msg = "Time Event end notification failure";
343
344 IWL_DEBUG_TE(mvm, "%s\n", msg);
345
346 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) {
347 iwl_mvm_te_clear_data(mvm, te_data);
348 return;
349 }
350 }
351
352 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) {
353 IWL_DEBUG_TE(mvm,
354 "TE ended - current time %lu, estimated end %lu\n",
355 jiffies, te_data->end_jiffies);
356
357 switch (te_data->vif->type) {
358 case NL80211_IFTYPE_P2P_DEVICE:
359 ieee80211_remain_on_channel_expired(mvm->hw);
360 iwl_mvm_p2p_roc_finished(mvm);
361 break;
362 case NL80211_IFTYPE_STATION:
363 /*
364 * If we are switching channel, don't disconnect
365 * if the time event is already done. Beacons can
366 * be delayed a bit after the switch.
367 */
368 if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
369 IWL_DEBUG_TE(mvm,
370 "No beacon heard and the CS time event is over, don't disconnect\n");
371 break;
372 }
373
374 /*
375 * By now, we should have finished association
376 * and know the dtim period.
377 */
378 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
379 !te_data->vif->cfg.assoc ?
380 "Not associated and the time event is over already..." :
381 "No beacon heard and the time event is over already...");
382 break;
383 default:
384 break;
385 }
386
387 iwl_mvm_te_clear_data(mvm, te_data);
388 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
389 te_data->running = true;
390 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
391
392 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
393 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
394 ieee80211_ready_on_channel(mvm->hw);
395 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
396 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
397 }
398 } else {
399 IWL_WARN(mvm, "Got TE with unknown action\n");
400 }
401}
402
403void iwl_mvm_rx_roc_notif(struct iwl_mvm *mvm,
404 struct iwl_rx_cmd_buffer *rxb)
405{
406 struct iwl_rx_packet *pkt = rxb_addr(rxb);
407 struct iwl_roc_notif *notif = (void *)pkt->data;
408
409 if (le32_to_cpu(notif->success) && le32_to_cpu(notif->started) &&
410 le32_to_cpu(notif->activity) == ROC_ACTIVITY_HOTSPOT) {
411 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
412 ieee80211_ready_on_channel(mvm->hw);
413 } else {
414 iwl_mvm_roc_finished(mvm);
415 ieee80211_remain_on_channel_expired(mvm->hw);
416 }
417}
418
419/*
420 * Handle A Aux ROC time event
421 */
422static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
423 struct iwl_time_event_notif *notif)
424{
425 struct iwl_mvm_time_event_data *aux_roc_te = NULL, *te_data;
426
427 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) {
428 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
429 aux_roc_te = te_data;
430 break;
431 }
432 }
433 if (!aux_roc_te) /* Not a Aux ROC time event */
434 return -EINVAL;
435
436 iwl_mvm_te_check_trigger(mvm, notif, te_data);
437
438 IWL_DEBUG_TE(mvm,
439 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n",
440 le32_to_cpu(notif->unique_id),
441 le32_to_cpu(notif->action), le32_to_cpu(notif->status));
442
443 if (!le32_to_cpu(notif->status) ||
444 le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
445 /* End TE, notify mac80211 */
446 ieee80211_remain_on_channel_expired(mvm->hw);
447 iwl_mvm_roc_finished(mvm); /* flush aux queue */
448 list_del(&te_data->list); /* remove from list */
449 te_data->running = false;
450 te_data->vif = NULL;
451 te_data->uid = 0;
452 te_data->id = TE_MAX;
453 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
454 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
455 te_data->running = true;
456 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
457 } else {
458 IWL_DEBUG_TE(mvm,
459 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
460 le32_to_cpu(notif->action));
461 return -EINVAL;
462 }
463
464 return 0;
465}
466
467/*
468 * The Rx handler for time event notifications
469 */
470void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
471 struct iwl_rx_cmd_buffer *rxb)
472{
473 struct iwl_rx_packet *pkt = rxb_addr(rxb);
474 struct iwl_time_event_notif *notif = (void *)pkt->data;
475 struct iwl_mvm_time_event_data *te_data, *tmp;
476
477 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
478 le32_to_cpu(notif->unique_id),
479 le32_to_cpu(notif->action));
480
481 spin_lock_bh(&mvm->time_event_lock);
482 /* This time event is triggered for Aux ROC request */
483 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
484 goto unlock;
485
486 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
487 if (le32_to_cpu(notif->unique_id) == te_data->uid)
488 iwl_mvm_te_handle_notif(mvm, te_data, notif);
489 }
490unlock:
491 spin_unlock_bh(&mvm->time_event_lock);
492}
493
494static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
495 struct iwl_rx_packet *pkt, void *data)
496{
497 struct iwl_mvm *mvm =
498 container_of(notif_wait, struct iwl_mvm, notif_wait);
499 struct iwl_mvm_time_event_data *te_data = data;
500 struct iwl_time_event_notif *resp;
501 int resp_len = iwl_rx_packet_payload_len(pkt);
502
503 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
504 return true;
505
506 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
507 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
508 return true;
509 }
510
511 resp = (void *)pkt->data;
512
513 /* te_data->uid is already set in the TIME_EVENT_CMD response */
514 if (le32_to_cpu(resp->unique_id) != te_data->uid)
515 return false;
516
517 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
518 te_data->uid);
519 if (!resp->status)
520 IWL_ERR(mvm,
521 "TIME_EVENT_NOTIFICATION received but not executed\n");
522
523 return true;
524}
525
526static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
527 struct iwl_rx_packet *pkt, void *data)
528{
529 struct iwl_mvm *mvm =
530 container_of(notif_wait, struct iwl_mvm, notif_wait);
531 struct iwl_mvm_time_event_data *te_data = data;
532 struct iwl_time_event_resp *resp;
533 int resp_len = iwl_rx_packet_payload_len(pkt);
534
535 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
536 return true;
537
538 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
539 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
540 return true;
541 }
542
543 resp = (void *)pkt->data;
544
545 /* we should never get a response to another TIME_EVENT_CMD here */
546 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
547 return false;
548
549 te_data->uid = le32_to_cpu(resp->unique_id);
550 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
551 te_data->uid);
552 return true;
553}
554
555static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
556 struct ieee80211_vif *vif,
557 struct iwl_mvm_time_event_data *te_data,
558 struct iwl_time_event_cmd *te_cmd)
559{
560 static const u16 time_event_response[] = { TIME_EVENT_CMD };
561 struct iwl_notification_wait wait_time_event;
562 int ret;
563
564 lockdep_assert_held(&mvm->mutex);
565
566 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
567 le32_to_cpu(te_cmd->duration));
568
569 spin_lock_bh(&mvm->time_event_lock);
570 if (WARN_ON(te_data->id != TE_MAX)) {
571 spin_unlock_bh(&mvm->time_event_lock);
572 return -EIO;
573 }
574 te_data->vif = vif;
575 te_data->duration = le32_to_cpu(te_cmd->duration);
576 te_data->id = le32_to_cpu(te_cmd->id);
577 list_add_tail(&te_data->list, &mvm->time_event_list);
578 spin_unlock_bh(&mvm->time_event_lock);
579
580 /*
581 * Use a notification wait, which really just processes the
582 * command response and doesn't wait for anything, in order
583 * to be able to process the response and get the UID inside
584 * the RX path. Using CMD_WANT_SKB doesn't work because it
585 * stores the buffer and then wakes up this thread, by which
586 * time another notification (that the time event started)
587 * might already be processed unsuccessfully.
588 */
589 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
590 time_event_response,
591 ARRAY_SIZE(time_event_response),
592 iwl_mvm_time_event_response, te_data);
593
594 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
595 sizeof(*te_cmd), te_cmd);
596 if (ret) {
597 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
598 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
599 goto out_clear_te;
600 }
601
602 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
603 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
604 /* should never fail */
605 WARN_ON_ONCE(ret);
606
607 if (ret) {
608 out_clear_te:
609 spin_lock_bh(&mvm->time_event_lock);
610 iwl_mvm_te_clear_data(mvm, te_data);
611 spin_unlock_bh(&mvm->time_event_lock);
612 }
613 return ret;
614}
615
616void iwl_mvm_protect_session(struct iwl_mvm *mvm,
617 struct ieee80211_vif *vif,
618 u32 duration, u32 min_duration,
619 u32 max_delay, bool wait_for_notif)
620{
621 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
622 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
623 const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
624 struct iwl_notification_wait wait_te_notif;
625 struct iwl_time_event_cmd time_cmd = {};
626
627 lockdep_assert_held(&mvm->mutex);
628
629 if (te_data->running &&
630 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
631 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
632 jiffies_to_msecs(te_data->end_jiffies - jiffies));
633 return;
634 }
635
636 if (te_data->running) {
637 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
638 te_data->uid,
639 jiffies_to_msecs(te_data->end_jiffies - jiffies));
640 /*
641 * we don't have enough time
642 * cancel the current TE and issue a new one
643 * Of course it would be better to remove the old one only
644 * when the new one is added, but we don't care if we are off
645 * channel for a bit. All we need to do, is not to return
646 * before we actually begin to be on the channel.
647 */
648 iwl_mvm_stop_session_protection(mvm, vif);
649 }
650
651 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
652 time_cmd.id_and_color =
653 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
654 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
655
656 time_cmd.apply_time = cpu_to_le32(0);
657
658 time_cmd.max_frags = TE_V2_FRAG_NONE;
659 time_cmd.max_delay = cpu_to_le32(max_delay);
660 /* TODO: why do we need to interval = bi if it is not periodic? */
661 time_cmd.interval = cpu_to_le32(1);
662 time_cmd.duration = cpu_to_le32(duration);
663 time_cmd.repeat = 1;
664 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
665 TE_V2_NOTIF_HOST_EVENT_END |
666 TE_V2_START_IMMEDIATELY);
667
668 if (!wait_for_notif) {
669 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
670 return;
671 }
672
673 /*
674 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
675 * right after we send the time event
676 */
677 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
678 te_notif_response,
679 ARRAY_SIZE(te_notif_response),
680 iwl_mvm_te_notif, te_data);
681
682 /* If TE was sent OK - wait for the notification that started */
683 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
684 IWL_ERR(mvm, "Failed to add TE to protect session\n");
685 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
686 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
687 TU_TO_JIFFIES(max_delay))) {
688 IWL_ERR(mvm, "Failed to protect session until TE\n");
689 }
690}
691
692/* Determine whether mac or link id should be used, and validate the link id */
693static int iwl_mvm_get_session_prot_id(struct iwl_mvm *mvm,
694 struct ieee80211_vif *vif,
695 u32 link_id)
696{
697 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
698 int ver = iwl_fw_lookup_cmd_ver(mvm->fw,
699 WIDE_ID(MAC_CONF_GROUP,
700 SESSION_PROTECTION_CMD), 1);
701
702 if (ver < 2)
703 return mvmvif->id;
704
705 if (WARN(link_id < 0 || !mvmvif->link[link_id],
706 "Invalid link ID for session protection: %u\n", link_id))
707 return -EINVAL;
708
709 if (WARN(ieee80211_vif_is_mld(vif) &&
710 !(vif->active_links & BIT(link_id)),
711 "Session Protection on an inactive link: %u\n", link_id))
712 return -EINVAL;
713
714 return mvmvif->link[link_id]->fw_link_id;
715}
716
717static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm,
718 struct ieee80211_vif *vif,
719 u32 id, u32 link_id)
720{
721 int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, link_id);
722 struct iwl_mvm_session_prot_cmd cmd = {
723 .id_and_color = cpu_to_le32(mac_link_id),
724 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
725 .conf_id = cpu_to_le32(id),
726 };
727 int ret;
728
729 if (mac_link_id < 0)
730 return;
731
732 ret = iwl_mvm_send_cmd_pdu(mvm,
733 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
734 0, sizeof(cmd), &cmd);
735 if (ret)
736 IWL_ERR(mvm,
737 "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret);
738}
739
740static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
741 struct iwl_mvm_time_event_data *te_data,
742 u32 *uid)
743{
744 u32 id;
745 struct ieee80211_vif *vif = te_data->vif;
746 struct iwl_mvm_vif *mvmvif;
747 enum nl80211_iftype iftype;
748 unsigned int link_id;
749
750 if (!vif)
751 return false;
752
753 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
754 iftype = te_data->vif->type;
755
756 /*
757 * It is possible that by the time we got to this point the time
758 * event was already removed.
759 */
760 spin_lock_bh(&mvm->time_event_lock);
761
762 /* Save time event uid before clearing its data */
763 *uid = te_data->uid;
764 id = te_data->id;
765 link_id = te_data->link_id;
766
767 /*
768 * The clear_data function handles time events that were already removed
769 */
770 iwl_mvm_te_clear_data(mvm, te_data);
771 spin_unlock_bh(&mvm->time_event_lock);
772
773 /* When session protection is used, the te_data->id field
774 * is reused to save session protection's configuration.
775 * For AUX ROC, HOT_SPOT_CMD is used and the te_data->id field is set
776 * to HOT_SPOT_CMD.
777 */
778 if (fw_has_capa(&mvm->fw->ucode_capa,
779 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD) &&
780 id != HOT_SPOT_CMD) {
781 if (mvmvif && id < SESSION_PROTECT_CONF_MAX_ID) {
782 /* Session protection is still ongoing. Cancel it */
783 iwl_mvm_cancel_session_protection(mvm, vif, id,
784 link_id);
785 if (iftype == NL80211_IFTYPE_P2P_DEVICE) {
786 iwl_mvm_p2p_roc_finished(mvm);
787 }
788 }
789 return false;
790 } else {
791 /* It is possible that by the time we try to remove it, the
792 * time event has already ended and removed. In such a case
793 * there is no need to send a removal command.
794 */
795 if (id == TE_MAX) {
796 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
797 return false;
798 }
799 }
800
801 return true;
802}
803
804/*
805 * Explicit request to remove a aux roc time event. The removal of a time
806 * event needs to be synchronized with the flow of a time event's end
807 * notification, which also removes the time event from the op mode
808 * data structures.
809 */
810static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
811 struct iwl_mvm_vif *mvmvif,
812 struct iwl_mvm_time_event_data *te_data)
813{
814 struct iwl_hs20_roc_req aux_cmd = {};
815 u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm);
816
817 u32 uid;
818 int ret;
819
820 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
821 return;
822
823 aux_cmd.event_unique_id = cpu_to_le32(uid);
824 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
825 aux_cmd.id_and_color =
826 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
827 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
828 le32_to_cpu(aux_cmd.event_unique_id));
829 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
830 len, &aux_cmd);
831
832 if (WARN_ON(ret))
833 return;
834}
835
836/*
837 * Explicit request to remove a time event. The removal of a time event needs to
838 * be synchronized with the flow of a time event's end notification, which also
839 * removes the time event from the op mode data structures.
840 */
841void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
842 struct iwl_mvm_vif *mvmvif,
843 struct iwl_mvm_time_event_data *te_data)
844{
845 struct iwl_time_event_cmd time_cmd = {};
846 u32 uid;
847 int ret;
848
849 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
850 return;
851
852 /* When we remove a TE, the UID is to be set in the id field */
853 time_cmd.id = cpu_to_le32(uid);
854 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
855 time_cmd.id_and_color =
856 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
857
858 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
859 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
860 sizeof(time_cmd), &time_cmd);
861 if (ret)
862 IWL_ERR(mvm, "Couldn't remove the time event\n");
863}
864
865void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
866 struct ieee80211_vif *vif)
867{
868 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
869 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
870 u32 id;
871
872 lockdep_assert_held(&mvm->mutex);
873
874 spin_lock_bh(&mvm->time_event_lock);
875 id = te_data->id;
876 spin_unlock_bh(&mvm->time_event_lock);
877
878 if (fw_has_capa(&mvm->fw->ucode_capa,
879 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
880 if (id != SESSION_PROTECT_CONF_ASSOC) {
881 IWL_DEBUG_TE(mvm,
882 "don't remove session protection id=%u\n",
883 id);
884 return;
885 }
886 } else if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) {
887 IWL_DEBUG_TE(mvm,
888 "don't remove TE with id=%u (not session protection)\n",
889 id);
890 return;
891 }
892
893 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
894}
895
896void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm,
897 struct iwl_rx_cmd_buffer *rxb)
898{
899 struct iwl_rx_packet *pkt = rxb_addr(rxb);
900 struct iwl_mvm_session_prot_notif *notif = (void *)pkt->data;
901 unsigned int ver =
902 iwl_fw_lookup_cmd_ver(mvm->fw,
903 WIDE_ID(MAC_CONF_GROUP,
904 SESSION_PROTECTION_CMD), 2);
905 int id = le32_to_cpu(notif->mac_link_id);
906 struct ieee80211_vif *vif;
907 struct iwl_mvm_vif *mvmvif;
908 unsigned int notif_link_id;
909
910 rcu_read_lock();
911
912 if (ver <= 2) {
913 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
914 } else {
915 struct ieee80211_bss_conf *link_conf =
916 iwl_mvm_rcu_fw_link_id_to_link_conf(mvm, id, true);
917
918 if (!link_conf)
919 goto out_unlock;
920
921 notif_link_id = link_conf->link_id;
922 vif = link_conf->vif;
923 }
924
925 if (!vif)
926 goto out_unlock;
927
928 mvmvif = iwl_mvm_vif_from_mac80211(vif);
929
930 if (WARN(ver > 2 && mvmvif->time_event_data.link_id >= 0 &&
931 mvmvif->time_event_data.link_id != notif_link_id,
932 "SESION_PROTECTION_NOTIF was received for link %u, while the current time event is on link %u\n",
933 notif_link_id, mvmvif->time_event_data.link_id))
934 goto out_unlock;
935
936 /* The vif is not a P2P_DEVICE, maintain its time_event_data */
937 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
938 struct iwl_mvm_time_event_data *te_data =
939 &mvmvif->time_event_data;
940
941 if (!le32_to_cpu(notif->status)) {
942 iwl_mvm_te_check_disconnect(mvm, vif,
943 "Session protection failure");
944 spin_lock_bh(&mvm->time_event_lock);
945 iwl_mvm_te_clear_data(mvm, te_data);
946 spin_unlock_bh(&mvm->time_event_lock);
947 }
948
949 if (le32_to_cpu(notif->start)) {
950 spin_lock_bh(&mvm->time_event_lock);
951 te_data->running = le32_to_cpu(notif->start);
952 te_data->end_jiffies =
953 TU_TO_EXP_TIME(te_data->duration);
954 spin_unlock_bh(&mvm->time_event_lock);
955 } else {
956 /*
957 * By now, we should have finished association
958 * and know the dtim period.
959 */
960 iwl_mvm_te_check_disconnect(mvm, vif,
961 !vif->cfg.assoc ?
962 "Not associated and the session protection is over already..." :
963 "No beacon heard and the session protection is over already...");
964 spin_lock_bh(&mvm->time_event_lock);
965 iwl_mvm_te_clear_data(mvm, te_data);
966 spin_unlock_bh(&mvm->time_event_lock);
967 }
968
969 goto out_unlock;
970 }
971
972 if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) {
973 /* End TE, notify mac80211 */
974 mvmvif->time_event_data.id = SESSION_PROTECT_CONF_MAX_ID;
975 mvmvif->time_event_data.link_id = -1;
976 iwl_mvm_p2p_roc_finished(mvm);
977 ieee80211_remain_on_channel_expired(mvm->hw);
978 } else if (le32_to_cpu(notif->start)) {
979 if (WARN_ON(mvmvif->time_event_data.id !=
980 le32_to_cpu(notif->conf_id)))
981 goto out_unlock;
982 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
983 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
984 }
985
986 out_unlock:
987 rcu_read_unlock();
988}
989
990static int
991iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm,
992 struct ieee80211_vif *vif,
993 int duration,
994 enum ieee80211_roc_type type)
995{
996 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
997 struct iwl_mvm_session_prot_cmd cmd = {
998 .id_and_color =
999 cpu_to_le32(iwl_mvm_get_session_prot_id(mvm, vif, 0)),
1000 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1001 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1002 };
1003
1004 lockdep_assert_held(&mvm->mutex);
1005
1006 /* The time_event_data.id field is reused to save session
1007 * protection's configuration.
1008 */
1009
1010 mvmvif->time_event_data.link_id = 0;
1011
1012 switch (type) {
1013 case IEEE80211_ROC_TYPE_NORMAL:
1014 mvmvif->time_event_data.id =
1015 SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV;
1016 break;
1017 case IEEE80211_ROC_TYPE_MGMT_TX:
1018 mvmvif->time_event_data.id =
1019 SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION;
1020 break;
1021 default:
1022 WARN_ONCE(1, "Got an invalid ROC type\n");
1023 return -EINVAL;
1024 }
1025
1026 cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id);
1027 return iwl_mvm_send_cmd_pdu(mvm,
1028 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1029 0, sizeof(cmd), &cmd);
1030}
1031
1032int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1033 int duration, enum ieee80211_roc_type type)
1034{
1035 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1036 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1037 struct iwl_time_event_cmd time_cmd = {};
1038
1039 lockdep_assert_held(&mvm->mutex);
1040 if (te_data->running) {
1041 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
1042 return -EBUSY;
1043 }
1044
1045 if (fw_has_capa(&mvm->fw->ucode_capa,
1046 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
1047 return iwl_mvm_start_p2p_roc_session_protection(mvm, vif,
1048 duration,
1049 type);
1050
1051 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1052 time_cmd.id_and_color =
1053 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1054
1055 switch (type) {
1056 case IEEE80211_ROC_TYPE_NORMAL:
1057 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
1058 break;
1059 case IEEE80211_ROC_TYPE_MGMT_TX:
1060 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
1061 break;
1062 default:
1063 WARN_ONCE(1, "Got an invalid ROC type\n");
1064 return -EINVAL;
1065 }
1066
1067 time_cmd.apply_time = cpu_to_le32(0);
1068 time_cmd.interval = cpu_to_le32(1);
1069
1070 /*
1071 * The P2P Device TEs can have lower priority than other events
1072 * that are being scheduled by the driver/fw, and thus it might not be
1073 * scheduled. To improve the chances of it being scheduled, allow them
1074 * to be fragmented, and in addition allow them to be delayed.
1075 */
1076 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
1077 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
1078 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
1079 time_cmd.repeat = 1;
1080 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1081 TE_V2_NOTIF_HOST_EVENT_END |
1082 TE_V2_START_IMMEDIATELY);
1083
1084 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1085}
1086
1087static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm)
1088{
1089 struct iwl_mvm_time_event_data *te_data;
1090
1091 lockdep_assert_held(&mvm->mutex);
1092
1093 spin_lock_bh(&mvm->time_event_lock);
1094
1095 /*
1096 * Iterate over the list of time events and find the time event that is
1097 * associated with a P2P_DEVICE interface.
1098 * This assumes that a P2P_DEVICE interface can have only a single time
1099 * event at any given time and this time event coresponds to a ROC
1100 * request
1101 */
1102 list_for_each_entry(te_data, &mvm->time_event_list, list) {
1103 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE)
1104 goto out;
1105 }
1106
1107 /* There can only be at most one AUX ROC time event, we just use the
1108 * list to simplify/unify code. Remove it if it exists.
1109 */
1110 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list,
1111 struct iwl_mvm_time_event_data,
1112 list);
1113out:
1114 spin_unlock_bh(&mvm->time_event_lock);
1115 return te_data;
1116}
1117
1118void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm)
1119{
1120 struct iwl_mvm_time_event_data *te_data;
1121 u32 uid;
1122
1123 te_data = iwl_mvm_get_roc_te(mvm);
1124 if (te_data)
1125 __iwl_mvm_remove_time_event(mvm, te_data, &uid);
1126}
1127
1128static void iwl_mvm_roc_rm_cmd(struct iwl_mvm *mvm, u32 activity)
1129{
1130 int ret;
1131 struct iwl_roc_req roc_cmd = {
1132 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
1133 .activity = cpu_to_le32(activity),
1134 };
1135
1136 lockdep_assert_held(&mvm->mutex);
1137 ret = iwl_mvm_send_cmd_pdu(mvm,
1138 WIDE_ID(MAC_CONF_GROUP, ROC_CMD),
1139 0, sizeof(roc_cmd), &roc_cmd);
1140 WARN_ON(ret);
1141}
1142
1143static void iwl_mvm_roc_station_remove(struct iwl_mvm *mvm,
1144 struct iwl_mvm_vif *mvmvif)
1145{
1146 u32 cmd_id = WIDE_ID(MAC_CONF_GROUP, ROC_CMD);
1147 u8 fw_ver = iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id,
1148 IWL_FW_CMD_VER_UNKNOWN);
1149
1150 if (fw_ver == IWL_FW_CMD_VER_UNKNOWN)
1151 iwl_mvm_remove_aux_roc_te(mvm, mvmvif,
1152 &mvmvif->hs_time_event_data);
1153 else if (fw_ver == 3)
1154 iwl_mvm_roc_rm_cmd(mvm, ROC_ACTIVITY_HOTSPOT);
1155 else
1156 IWL_ERR(mvm, "ROC command version %d mismatch!\n", fw_ver);
1157}
1158
1159void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1160{
1161 struct iwl_mvm_vif *mvmvif;
1162 struct iwl_mvm_time_event_data *te_data;
1163
1164 if (fw_has_capa(&mvm->fw->ucode_capa,
1165 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
1166 mvmvif = iwl_mvm_vif_from_mac80211(vif);
1167
1168 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1169 iwl_mvm_cancel_session_protection(mvm, vif,
1170 mvmvif->time_event_data.id,
1171 mvmvif->time_event_data.link_id);
1172 iwl_mvm_p2p_roc_finished(mvm);
1173 } else {
1174 iwl_mvm_roc_station_remove(mvm, mvmvif);
1175 iwl_mvm_roc_finished(mvm);
1176 }
1177
1178 return;
1179 }
1180
1181 te_data = iwl_mvm_get_roc_te(mvm);
1182 if (!te_data) {
1183 IWL_WARN(mvm, "No remain on channel event\n");
1184 return;
1185 }
1186
1187 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
1188
1189 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1190 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1191 iwl_mvm_p2p_roc_finished(mvm);
1192 } else {
1193 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
1194 iwl_mvm_roc_finished(mvm);
1195 }
1196}
1197
1198void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm,
1199 struct ieee80211_vif *vif)
1200{
1201 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1202 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1203 u32 id;
1204
1205 lockdep_assert_held(&mvm->mutex);
1206
1207 spin_lock_bh(&mvm->time_event_lock);
1208 id = te_data->id;
1209 spin_unlock_bh(&mvm->time_event_lock);
1210
1211 if (id != TE_CHANNEL_SWITCH_PERIOD)
1212 return;
1213
1214 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1215}
1216
1217int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
1218 struct ieee80211_vif *vif,
1219 u32 duration, u32 apply_time)
1220{
1221 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1222 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1223 struct iwl_time_event_cmd time_cmd = {};
1224
1225 lockdep_assert_held(&mvm->mutex);
1226
1227 if (te_data->running) {
1228 u32 id;
1229
1230 spin_lock_bh(&mvm->time_event_lock);
1231 id = te_data->id;
1232 spin_unlock_bh(&mvm->time_event_lock);
1233
1234 if (id == TE_CHANNEL_SWITCH_PERIOD) {
1235 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
1236 return -EBUSY;
1237 }
1238
1239 /*
1240 * Remove the session protection time event to allow the
1241 * channel switch. If we got here, we just heard a beacon so
1242 * the session protection is not needed anymore anyway.
1243 */
1244 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1245 }
1246
1247 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1248 time_cmd.id_and_color =
1249 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1250 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
1251 time_cmd.apply_time = cpu_to_le32(apply_time);
1252 time_cmd.max_frags = TE_V2_FRAG_NONE;
1253 time_cmd.duration = cpu_to_le32(duration);
1254 time_cmd.repeat = 1;
1255 time_cmd.interval = cpu_to_le32(1);
1256 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1257 TE_V2_ABSENCE);
1258 if (!apply_time)
1259 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY);
1260
1261 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1262}
1263
1264static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait,
1265 struct iwl_rx_packet *pkt, void *data)
1266{
1267 struct iwl_mvm *mvm =
1268 container_of(notif_wait, struct iwl_mvm, notif_wait);
1269 struct iwl_mvm_session_prot_notif *resp;
1270 int resp_len = iwl_rx_packet_payload_len(pkt);
1271
1272 if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF ||
1273 pkt->hdr.group_id != MAC_CONF_GROUP))
1274 return true;
1275
1276 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
1277 IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n");
1278 return true;
1279 }
1280
1281 resp = (void *)pkt->data;
1282
1283 if (!resp->status)
1284 IWL_ERR(mvm,
1285 "TIME_EVENT_NOTIFICATION received but not executed\n");
1286
1287 return true;
1288}
1289
1290void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
1291 struct ieee80211_vif *vif,
1292 u32 duration, u32 min_duration,
1293 bool wait_for_notif,
1294 unsigned int link_id)
1295{
1296 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1297 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1298 const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) };
1299 struct iwl_notification_wait wait_notif;
1300 int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, link_id);
1301 struct iwl_mvm_session_prot_cmd cmd = {
1302 .id_and_color = cpu_to_le32(mac_link_id),
1303 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1304 .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC),
1305 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1306 };
1307
1308 if (mac_link_id < 0)
1309 return;
1310
1311 lockdep_assert_held(&mvm->mutex);
1312
1313 spin_lock_bh(&mvm->time_event_lock);
1314 if (te_data->running && te_data->link_id == link_id &&
1315 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
1316 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
1317 jiffies_to_msecs(te_data->end_jiffies - jiffies));
1318 spin_unlock_bh(&mvm->time_event_lock);
1319
1320 return;
1321 }
1322
1323 iwl_mvm_te_clear_data(mvm, te_data);
1324 /*
1325 * The time_event_data.id field is reused to save session
1326 * protection's configuration.
1327 */
1328 te_data->id = le32_to_cpu(cmd.conf_id);
1329 te_data->duration = le32_to_cpu(cmd.duration_tu);
1330 te_data->vif = vif;
1331 te_data->link_id = link_id;
1332 spin_unlock_bh(&mvm->time_event_lock);
1333
1334 IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n",
1335 le32_to_cpu(cmd.duration_tu));
1336
1337 if (!wait_for_notif) {
1338 if (iwl_mvm_send_cmd_pdu(mvm,
1339 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1340 0, sizeof(cmd), &cmd)) {
1341 goto send_cmd_err;
1342 }
1343
1344 return;
1345 }
1346
1347 iwl_init_notification_wait(&mvm->notif_wait, &wait_notif,
1348 notif, ARRAY_SIZE(notif),
1349 iwl_mvm_session_prot_notif, NULL);
1350
1351 if (iwl_mvm_send_cmd_pdu(mvm,
1352 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1353 0, sizeof(cmd), &cmd)) {
1354 iwl_remove_notification(&mvm->notif_wait, &wait_notif);
1355 goto send_cmd_err;
1356 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif,
1357 TU_TO_JIFFIES(100))) {
1358 IWL_ERR(mvm,
1359 "Failed to protect session until session protection\n");
1360 }
1361 return;
1362
1363send_cmd_err:
1364 IWL_ERR(mvm,
1365 "Couldn't send the SESSION_PROTECTION_CMD\n");
1366 spin_lock_bh(&mvm->time_event_lock);
1367 iwl_mvm_te_clear_data(mvm, te_data);
1368 spin_unlock_bh(&mvm->time_event_lock);
1369}
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
25void 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
48static 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
133void 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
142static 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
154static 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
185out_unlock:
186 rcu_read_unlock();
187}
188
189static 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
231static void
232iwl_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
268static 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 */
312static 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
399struct iwl_mvm_rx_roc_iterator_data {
400 u32 activity;
401 bool end_activity;
402 bool found;
403};
404
405static 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
418void 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 */
455static 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 */
503void 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 }
523unlock:
524 spin_unlock_bh(&mvm->time_event_lock);
525}
526
527static 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
559static 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
588static 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
649void 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 */
726static 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
749static 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_mvm_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
772static 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
787static 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 */
868static 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 */
899void 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
923void 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
954void 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_mvm_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
1055void 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
1098int 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
1146static int
1147iwl_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_mvm_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
1188int 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
1243static 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);
1269out:
1270 spin_unlock_bh(&mvm->time_event_lock);
1271 return te_data;
1272}
1273
1274void 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
1284void 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
1336cleanup_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
1351void 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
1370int 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
1417static 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_mvm_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
1443void 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_mvm_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
1516send_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}