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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / net / wireless / intel / iwlwifi / mvm / time-event.c
blob72fa7ac86516cda424b411354372f51ef9749820
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
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
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
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
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
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
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
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
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 */
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
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
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 */
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 */
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
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
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
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
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 */
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
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_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
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
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 */
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 */
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
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
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_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 iwl_mvm_roc_finished(mvm);
1034 ieee80211_remain_on_channel_expired(mvm->hw);
1035 } else if (le32_to_cpu(notif->start)) {
1036 if (WARN_ON(mvmvif->time_event_data.id !=
1037 le32_to_cpu(notif->conf_id)))
1038 goto out_unlock;
1039 set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status);
1040 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
1041 }
1042
1043 out_unlock:
1044 rcu_read_unlock();
1045 }
1046
1047 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
1048 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
1049 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
1050 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
1051 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
1052
1053 void iwl_mvm_roc_duration_and_delay(struct ieee80211_vif *vif,
1054 u32 duration_ms,
1055 u32 *duration_tu,
1056 u32 *delay)
1057 {
1058 struct ieee80211_bss_conf *link_conf;
1059 unsigned int link_id;
1060 u32 dtim_interval = 0;
1061
1062 *delay = AUX_ROC_MIN_DELAY;
1063 *duration_tu = MSEC_TO_TU(duration_ms);
1064
1065 rcu_read_lock();
1066 for_each_vif_active_link(vif, link_conf, link_id) {
1067 dtim_interval =
1068 max_t(u32, dtim_interval,
1069 link_conf->dtim_period * link_conf->beacon_int);
1070 }
1071 rcu_read_unlock();
1072
1073 /*
1074 * If we are associated we want the delay time to be at least one
1075 * dtim interval so that the FW can wait until after the DTIM and
1076 * then start the time event, this will potentially allow us to
1077 * remain off-channel for the max duration.
1078 * Since we want to use almost a whole dtim interval we would also
1079 * like the delay to be for 2-3 dtim intervals, in case there are
1080 * other time events with higher priority.
1081 * dtim_interval should never be 0, it can be 1 if we don't know it
1082 * (we haven't heard any beacon yet).
1083 */
1084 if (vif->cfg.assoc && !WARN_ON(!dtim_interval)) {
1085 *delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
1086 /* We cannot remain off-channel longer than the DTIM interval */
1087 if (dtim_interval <= *duration_tu) {
1088 *duration_tu = dtim_interval - AUX_ROC_SAFETY_BUFFER;
1089 if (*duration_tu <= AUX_ROC_MIN_DURATION)
1090 *duration_tu = dtim_interval -
1091 AUX_ROC_MIN_SAFETY_BUFFER;
1092 }
1093 }
1094 }
1095
1096 int iwl_mvm_roc_add_cmd(struct iwl_mvm *mvm,
1097 struct ieee80211_channel *channel,
1098 struct ieee80211_vif *vif,
1099 int duration, enum iwl_roc_activity activity)
1100 {
1101 int res;
1102 u32 duration_tu, delay;
1103 struct iwl_roc_req roc_req = {
1104 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1105 .activity = cpu_to_le32(activity),
1106 .sta_id = cpu_to_le32(mvm->aux_sta.sta_id),
1107 };
1108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1109
1110 lockdep_assert_held(&mvm->mutex);
1111
1112 if (WARN_ON(mvmvif->roc_activity != ROC_NUM_ACTIVITIES))
1113 return -EBUSY;
1114
1115 /* Set the channel info data */
1116 iwl_mvm_set_chan_info(mvm, &roc_req.channel_info,
1117 channel->hw_value,
1118 iwl_mvm_phy_band_from_nl80211(channel->band),
1119 IWL_PHY_CHANNEL_MODE20, 0);
1120
1121 iwl_mvm_roc_duration_and_delay(vif, duration, &duration_tu,
1122 &delay);
1123 roc_req.duration = cpu_to_le32(duration_tu);
1124 roc_req.max_delay = cpu_to_le32(delay);
1125
1126 IWL_DEBUG_TE(mvm,
1127 "\t(requested = %ums, max_delay = %ums)\n",
1128 duration, delay);
1129 IWL_DEBUG_TE(mvm,
1130 "Requesting to remain on channel %u for %utu. activity %u\n",
1131 channel->hw_value, duration_tu, activity);
1132
1133 /* Set the node address */
1134 memcpy(roc_req.node_addr, vif->addr, ETH_ALEN);
1135
1136 res = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, ROC_CMD),
1137 0, sizeof(roc_req), &roc_req);
1138 if (!res)
1139 mvmvif->roc_activity = activity;
1140
1141 return res;
1142 }
1143
1144 static int
1145 iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm,
1146 struct ieee80211_vif *vif,
1147 int duration,
1148 enum ieee80211_roc_type type)
1149 {
1150 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1151 struct iwl_mvm_session_prot_cmd cmd = {
1152 .id_and_color =
1153 cpu_to_le32(iwl_mvm_get_session_prot_id(mvm, vif, 0)),
1154 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1155 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1156 };
1157
1158 lockdep_assert_held(&mvm->mutex);
1159
1160 /* The time_event_data.id field is reused to save session
1161 * protection's configuration.
1162 */
1163
1164 mvmvif->time_event_data.link_id = 0;
1165
1166 switch (type) {
1167 case IEEE80211_ROC_TYPE_NORMAL:
1168 mvmvif->time_event_data.id =
1169 SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV;
1170 break;
1171 case IEEE80211_ROC_TYPE_MGMT_TX:
1172 mvmvif->time_event_data.id =
1173 SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION;
1174 break;
1175 default:
1176 WARN_ONCE(1, "Got an invalid ROC type\n");
1177 return -EINVAL;
1178 }
1179
1180 cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id);
1181 return iwl_mvm_send_cmd_pdu(mvm,
1182 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1183 0, sizeof(cmd), &cmd);
1184 }
1185
1186 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1187 int duration, enum ieee80211_roc_type type)
1188 {
1189 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1190 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1191 struct iwl_time_event_cmd time_cmd = {};
1192
1193 lockdep_assert_held(&mvm->mutex);
1194 if (te_data->running) {
1195 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
1196 return -EBUSY;
1197 }
1198
1199 if (fw_has_capa(&mvm->fw->ucode_capa,
1200 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
1201 return iwl_mvm_start_p2p_roc_session_protection(mvm, vif,
1202 duration,
1203 type);
1204
1205 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1206 time_cmd.id_and_color =
1207 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1208
1209 switch (type) {
1210 case IEEE80211_ROC_TYPE_NORMAL:
1211 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
1212 break;
1213 case IEEE80211_ROC_TYPE_MGMT_TX:
1214 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
1215 break;
1216 default:
1217 WARN_ONCE(1, "Got an invalid ROC type\n");
1218 return -EINVAL;
1219 }
1220
1221 time_cmd.apply_time = cpu_to_le32(0);
1222 time_cmd.interval = cpu_to_le32(1);
1223
1224 /*
1225 * The P2P Device TEs can have lower priority than other events
1226 * that are being scheduled by the driver/fw, and thus it might not be
1227 * scheduled. To improve the chances of it being scheduled, allow them
1228 * to be fragmented, and in addition allow them to be delayed.
1229 */
1230 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
1231 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
1232 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
1233 time_cmd.repeat = 1;
1234 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1235 TE_V2_NOTIF_HOST_EVENT_END |
1236 TE_V2_START_IMMEDIATELY);
1237
1238 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1239 }
1240
1241 static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm)
1242 {
1243 struct iwl_mvm_time_event_data *te_data;
1244
1245 lockdep_assert_held(&mvm->mutex);
1246
1247 spin_lock_bh(&mvm->time_event_lock);
1248
1249 /*
1250 * Iterate over the list of time events and find the time event that is
1251 * associated with a P2P_DEVICE interface.
1252 * This assumes that a P2P_DEVICE interface can have only a single time
1253 * event at any given time and this time event coresponds to a ROC
1254 * request
1255 */
1256 list_for_each_entry(te_data, &mvm->time_event_list, list) {
1257 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE)
1258 goto out;
1259 }
1260
1261 /* There can only be at most one AUX ROC time event, we just use the
1262 * list to simplify/unify code. Remove it if it exists.
1263 */
1264 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list,
1265 struct iwl_mvm_time_event_data,
1266 list);
1267 out:
1268 spin_unlock_bh(&mvm->time_event_lock);
1269 return te_data;
1270 }
1271
1272 void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm)
1273 {
1274 struct iwl_mvm_time_event_data *te_data;
1275 u32 uid;
1276
1277 te_data = iwl_mvm_get_roc_te(mvm);
1278 if (te_data)
1279 __iwl_mvm_remove_time_event(mvm, te_data, &uid);
1280 }
1281
1282 void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1283 {
1284 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1285 struct iwl_mvm_time_event_data *te_data;
1286 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
1287 u8 roc_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
1288 WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0);
1289 int iftype = vif->type;
1290
1291 mutex_lock(&mvm->mutex);
1292
1293 if (p2p_aux || (roc_ver >= 3 && iftype != NL80211_IFTYPE_P2P_DEVICE)) {
1294 if (mvmvif->roc_activity < ROC_NUM_ACTIVITIES) {
1295 iwl_mvm_roc_rm_cmd(mvm, mvmvif->roc_activity);
1296 mvmvif->roc_activity = ROC_NUM_ACTIVITIES;
1297 }
1298 goto cleanup_roc;
1299 } else if (fw_has_capa(&mvm->fw->ucode_capa,
1300 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
1301 te_data = &mvmvif->time_event_data;
1302
1303 if (iftype == NL80211_IFTYPE_P2P_DEVICE) {
1304 if (te_data->id >= SESSION_PROTECT_CONF_MAX_ID) {
1305 IWL_DEBUG_TE(mvm,
1306 "No remain on channel event\n");
1307 mutex_unlock(&mvm->mutex);
1308 return;
1309 }
1310 iwl_mvm_cancel_session_protection(mvm, vif,
1311 te_data->id,
1312 te_data->link_id);
1313 } else {
1314 iwl_mvm_remove_aux_roc_te(mvm, mvmvif,
1315 &mvmvif->hs_time_event_data);
1316 }
1317 goto cleanup_roc;
1318 }
1319
1320 te_data = iwl_mvm_get_roc_te(mvm);
1321 if (!te_data) {
1322 IWL_WARN(mvm, "No remain on channel event\n");
1323 mutex_unlock(&mvm->mutex);
1324 return;
1325 }
1326
1327 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
1328 iftype = te_data->vif->type;
1329 if (iftype == NL80211_IFTYPE_P2P_DEVICE)
1330 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1331 else
1332 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
1333
1334 cleanup_roc:
1335 /*
1336 * In case we get here before the ROC event started,
1337 * (so the status bit isn't set) set it here so iwl_mvm_cleanup_roc will
1338 * cleanup things properly
1339 */
1340 if (p2p_aux || iftype != NL80211_IFTYPE_P2P_DEVICE)
1341 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
1342 else
1343 set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status);
1344
1345 /* Mutex is released inside this function */
1346 iwl_mvm_cleanup_roc(mvm);
1347 }
1348
1349 void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm,
1350 struct ieee80211_vif *vif)
1351 {
1352 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1353 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1354 u32 id;
1355
1356 lockdep_assert_held(&mvm->mutex);
1357
1358 spin_lock_bh(&mvm->time_event_lock);
1359 id = te_data->id;
1360 spin_unlock_bh(&mvm->time_event_lock);
1361
1362 if (id != TE_CHANNEL_SWITCH_PERIOD)
1363 return;
1364
1365 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1366 }
1367
1368 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
1369 struct ieee80211_vif *vif,
1370 u32 duration, u32 apply_time)
1371 {
1372 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1373 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1374 struct iwl_time_event_cmd time_cmd = {};
1375
1376 lockdep_assert_held(&mvm->mutex);
1377
1378 if (te_data->running) {
1379 u32 id;
1380
1381 spin_lock_bh(&mvm->time_event_lock);
1382 id = te_data->id;
1383 spin_unlock_bh(&mvm->time_event_lock);
1384
1385 if (id == TE_CHANNEL_SWITCH_PERIOD) {
1386 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
1387 return -EBUSY;
1388 }
1389
1390 /*
1391 * Remove the session protection time event to allow the
1392 * channel switch. If we got here, we just heard a beacon so
1393 * the session protection is not needed anymore anyway.
1394 */
1395 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1396 }
1397
1398 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1399 time_cmd.id_and_color =
1400 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1401 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
1402 time_cmd.apply_time = cpu_to_le32(apply_time);
1403 time_cmd.max_frags = TE_V2_FRAG_NONE;
1404 time_cmd.duration = cpu_to_le32(duration);
1405 time_cmd.repeat = 1;
1406 time_cmd.interval = cpu_to_le32(1);
1407 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1408 TE_V2_ABSENCE);
1409 if (!apply_time)
1410 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY);
1411
1412 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1413 }
1414
1415 static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait,
1416 struct iwl_rx_packet *pkt, void *data)
1417 {
1418 struct iwl_mvm *mvm =
1419 container_of(notif_wait, struct iwl_mvm, notif_wait);
1420 struct iwl_mvm_session_prot_notif *resp;
1421 int resp_len = iwl_rx_packet_payload_len(pkt);
1422
1423 if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF ||
1424 pkt->hdr.group_id != MAC_CONF_GROUP))
1425 return true;
1426
1427 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
1428 IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n");
1429 return true;
1430 }
1431
1432 resp = (void *)pkt->data;
1433
1434 if (!resp->status)
1435 IWL_ERR(mvm,
1436 "TIME_EVENT_NOTIFICATION received but not executed\n");
1437
1438 return true;
1439 }
1440
1441 void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
1442 struct ieee80211_vif *vif,
1443 u32 duration, u32 min_duration,
1444 bool wait_for_notif,
1445 unsigned int link_id)
1446 {
1447 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1448 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1449 const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) };
1450 struct iwl_notification_wait wait_notif;
1451 int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, (s8)link_id);
1452 struct iwl_mvm_session_prot_cmd cmd = {
1453 .id_and_color = cpu_to_le32(mac_link_id),
1454 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1455 .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC),
1456 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1457 };
1458
1459 if (mac_link_id < 0)
1460 return;
1461
1462 lockdep_assert_held(&mvm->mutex);
1463
1464 spin_lock_bh(&mvm->time_event_lock);
1465 if (te_data->running && te_data->link_id == link_id &&
1466 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
1467 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
1468 jiffies_to_msecs(te_data->end_jiffies - jiffies));
1469 spin_unlock_bh(&mvm->time_event_lock);
1470
1471 return;
1472 }
1473
1474 iwl_mvm_te_clear_data(mvm, te_data);
1475 /*
1476 * The time_event_data.id field is reused to save session
1477 * protection's configuration.
1478 */
1479 te_data->id = le32_to_cpu(cmd.conf_id);
1480 te_data->duration = le32_to_cpu(cmd.duration_tu);
1481 te_data->vif = vif;
1482 te_data->link_id = link_id;
1483 spin_unlock_bh(&mvm->time_event_lock);
1484
1485 IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n",
1486 le32_to_cpu(cmd.duration_tu));
1487
1488 if (!wait_for_notif) {
1489 if (iwl_mvm_send_cmd_pdu(mvm,
1490 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1491 0, sizeof(cmd), &cmd)) {
1492 goto send_cmd_err;
1493 }
1494
1495 return;
1496 }
1497
1498 iwl_init_notification_wait(&mvm->notif_wait, &wait_notif,
1499 notif, ARRAY_SIZE(notif),
1500 iwl_mvm_session_prot_notif, NULL);
1501
1502 if (iwl_mvm_send_cmd_pdu(mvm,
1503 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1504 0, sizeof(cmd), &cmd)) {
1505 iwl_remove_notification(&mvm->notif_wait, &wait_notif);
1506 goto send_cmd_err;
1507 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif,
1508 TU_TO_JIFFIES(100))) {
1509 IWL_ERR(mvm,
1510 "Failed to protect session until session protection\n");
1511 }
1512 return;
1513
1514 send_cmd_err:
1515 IWL_ERR(mvm,
1516 "Couldn't send the SESSION_PROTECTION_CMD\n");
1517 spin_lock_bh(&mvm->time_event_lock);
1518 iwl_mvm_te_clear_data(mvm, te_data);
1519 spin_unlock_bh(&mvm->time_event_lock);
1520 }
Kernel DRM miscellaneous fixes and cross-tree changes