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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018-2022 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}
46
47void iwl_mvm_roc_done_wk(struct work_struct *wk)
48{
49 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk);
50
51 /*
52 * Clear the ROC_RUNNING status bit.
53 * This will cause the TX path to drop offchannel transmissions.
54 * That would also be done by mac80211, but it is racy, in particular
55 * in the case that the time event actually completed in the firmware
56 * (which is handled in iwl_mvm_te_handle_notif).
57 */
58 clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
59
60 synchronize_net();
61
62 /*
63 * Flush the offchannel queue -- this is called when the time
64 * event finishes or is canceled, so that frames queued for it
65 * won't get stuck on the queue and be transmitted in the next
66 * time event.
67 */
68
69 mutex_lock(&mvm->mutex);
70 if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) {
71 struct iwl_mvm_vif *mvmvif;
72
73 /*
74 * NB: access to this pointer would be racy, but the flush bit
75 * can only be set when we had a P2P-Device VIF, and we have a
76 * flush of this work in iwl_mvm_prepare_mac_removal() so it's
77 * not really racy.
78 */
79
80 if (!WARN_ON(!mvm->p2p_device_vif)) {
81 mvmvif = iwl_mvm_vif_from_mac80211(mvm->p2p_device_vif);
82 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true);
83 }
84 }
85
86 /*
87 * Clear the ROC_AUX_RUNNING status bit.
88 * This will cause the TX path to drop offchannel transmissions.
89 * That would also be done by mac80211, but it is racy, in particular
90 * in the case that the time event actually completed in the firmware
91 * (which is handled in iwl_mvm_te_handle_notif).
92 */
93 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) {
94 /* do the same in case of hot spot 2.0 */
95 iwl_mvm_flush_sta(mvm, &mvm->aux_sta, true);
96
97 /* In newer version of this command an aux station is added only
98 * in cases of dedicated tx queue and need to be removed in end
99 * of use */
100 if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12)
101 iwl_mvm_rm_aux_sta(mvm);
102 }
103
104 mutex_unlock(&mvm->mutex);
105}
106
107static void iwl_mvm_roc_finished(struct iwl_mvm *mvm)
108{
109 /*
110 * Of course, our status bit is just as racy as mac80211, so in
111 * addition, fire off the work struct which will drop all frames
112 * from the hardware queues that made it through the race. First
113 * it will of course synchronize the TX path to make sure that
114 * any *new* TX will be rejected.
115 */
116 schedule_work(&mvm->roc_done_wk);
117}
118
119static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm)
120{
121 struct ieee80211_vif *csa_vif;
122
123 rcu_read_lock();
124
125 csa_vif = rcu_dereference(mvm->csa_vif);
126 if (!csa_vif || !csa_vif->bss_conf.csa_active)
127 goto out_unlock;
128
129 IWL_DEBUG_TE(mvm, "CSA NOA started\n");
130
131 /*
132 * CSA NoA is started but we still have beacons to
133 * transmit on the current channel.
134 * So we just do nothing here and the switch
135 * will be performed on the last TBTT.
136 */
137 if (!ieee80211_beacon_cntdwn_is_complete(csa_vif)) {
138 IWL_WARN(mvm, "CSA NOA started too early\n");
139 goto out_unlock;
140 }
141
142 ieee80211_csa_finish(csa_vif);
143
144 rcu_read_unlock();
145
146 RCU_INIT_POINTER(mvm->csa_vif, NULL);
147
148 return;
149
150out_unlock:
151 rcu_read_unlock();
152}
153
154static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm,
155 struct ieee80211_vif *vif,
156 const char *errmsg)
157{
158 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
159
160 if (vif->type != NL80211_IFTYPE_STATION)
161 return false;
162
163 if (!mvmvif->csa_bcn_pending && vif->cfg.assoc &&
164 vif->bss_conf.dtim_period)
165 return false;
166 if (errmsg)
167 IWL_ERR(mvm, "%s\n", errmsg);
168
169 if (mvmvif->csa_bcn_pending) {
170 struct iwl_mvm_sta *mvmsta;
171
172 rcu_read_lock();
173 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
174 if (!WARN_ON(!mvmsta))
175 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
176 rcu_read_unlock();
177 }
178
179 if (vif->cfg.assoc) {
180 /*
181 * When not associated, this will be called from
182 * iwl_mvm_event_mlme_callback_ini()
183 */
184 iwl_dbg_tlv_time_point(&mvm->fwrt,
185 IWL_FW_INI_TIME_POINT_ASSOC_FAILED,
186 NULL);
187 }
188
189 iwl_mvm_connection_loss(mvm, vif, errmsg);
190 return true;
191}
192
193static void
194iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
195 struct iwl_mvm_time_event_data *te_data,
196 struct iwl_time_event_notif *notif)
197{
198 struct ieee80211_vif *vif = te_data->vif;
199 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
200
201 if (!notif->status)
202 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n");
203
204 switch (te_data->vif->type) {
205 case NL80211_IFTYPE_AP:
206 if (!notif->status)
207 mvmvif->csa_failed = true;
208 iwl_mvm_csa_noa_start(mvm);
209 break;
210 case NL80211_IFTYPE_STATION:
211 if (!notif->status) {
212 iwl_mvm_connection_loss(mvm, vif,
213 "CSA TE failed to start");
214 break;
215 }
216 iwl_mvm_csa_client_absent(mvm, te_data->vif);
217 cancel_delayed_work(&mvmvif->csa_work);
218 ieee80211_chswitch_done(te_data->vif, true);
219 break;
220 default:
221 /* should never happen */
222 WARN_ON_ONCE(1);
223 break;
224 }
225
226 /* we don't need it anymore */
227 iwl_mvm_te_clear_data(mvm, te_data);
228}
229
230static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm,
231 struct iwl_time_event_notif *notif,
232 struct iwl_mvm_time_event_data *te_data)
233{
234 struct iwl_fw_dbg_trigger_tlv *trig;
235 struct iwl_fw_dbg_trigger_time_event *te_trig;
236 int i;
237
238 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
239 ieee80211_vif_to_wdev(te_data->vif),
240 FW_DBG_TRIGGER_TIME_EVENT);
241 if (!trig)
242 return;
243
244 te_trig = (void *)trig->data;
245
246 for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) {
247 u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id);
248 u32 trig_action_bitmap =
249 le32_to_cpu(te_trig->time_events[i].action_bitmap);
250 u32 trig_status_bitmap =
251 le32_to_cpu(te_trig->time_events[i].status_bitmap);
252
253 if (trig_te_id != te_data->id ||
254 !(trig_action_bitmap & le32_to_cpu(notif->action)) ||
255 !(trig_status_bitmap & BIT(le32_to_cpu(notif->status))))
256 continue;
257
258 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
259 "Time event %d Action 0x%x received status: %d",
260 te_data->id,
261 le32_to_cpu(notif->action),
262 le32_to_cpu(notif->status));
263 break;
264 }
265}
266
267static void iwl_mvm_p2p_roc_finished(struct iwl_mvm *mvm)
268{
269 /*
270 * If the IWL_MVM_STATUS_NEED_FLUSH_P2P is already set, then the
271 * roc_done_wk is already scheduled or running, so don't schedule it
272 * again to avoid a race where the roc_done_wk clears this bit after
273 * it is set here, affecting the next run of the roc_done_wk.
274 */
275 if (!test_and_set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status))
276 iwl_mvm_roc_finished(mvm);
277}
278
279/*
280 * Handles a FW notification for an event that is known to the driver.
281 *
282 * @mvm: the mvm component
283 * @te_data: the time event data
284 * @notif: the notification data corresponding the time event data.
285 */
286static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm,
287 struct iwl_mvm_time_event_data *te_data,
288 struct iwl_time_event_notif *notif)
289{
290 lockdep_assert_held(&mvm->time_event_lock);
291
292 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n",
293 le32_to_cpu(notif->unique_id),
294 le32_to_cpu(notif->action));
295
296 iwl_mvm_te_check_trigger(mvm, notif, te_data);
297
298 /*
299 * The FW sends the start/end time event notifications even for events
300 * that it fails to schedule. This is indicated in the status field of
301 * the notification. This happens in cases that the scheduler cannot
302 * find a schedule that can handle the event (for example requesting a
303 * P2P Device discoveribility, while there are other higher priority
304 * events in the system).
305 */
306 if (!le32_to_cpu(notif->status)) {
307 const char *msg;
308
309 if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START))
310 msg = "Time Event start notification failure";
311 else
312 msg = "Time Event end notification failure";
313
314 IWL_DEBUG_TE(mvm, "%s\n", msg);
315
316 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) {
317 iwl_mvm_te_clear_data(mvm, te_data);
318 return;
319 }
320 }
321
322 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) {
323 IWL_DEBUG_TE(mvm,
324 "TE ended - current time %lu, estimated end %lu\n",
325 jiffies, te_data->end_jiffies);
326
327 switch (te_data->vif->type) {
328 case NL80211_IFTYPE_P2P_DEVICE:
329 ieee80211_remain_on_channel_expired(mvm->hw);
330 iwl_mvm_p2p_roc_finished(mvm);
331 break;
332 case NL80211_IFTYPE_STATION:
333 /*
334 * If we are switching channel, don't disconnect
335 * if the time event is already done. Beacons can
336 * be delayed a bit after the switch.
337 */
338 if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
339 IWL_DEBUG_TE(mvm,
340 "No beacon heard and the CS time event is over, don't disconnect\n");
341 break;
342 }
343
344 /*
345 * By now, we should have finished association
346 * and know the dtim period.
347 */
348 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
349 !te_data->vif->cfg.assoc ?
350 "Not associated and the time event is over already..." :
351 "No beacon heard and the time event is over already...");
352 break;
353 default:
354 break;
355 }
356
357 iwl_mvm_te_clear_data(mvm, te_data);
358 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
359 te_data->running = true;
360 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
361
362 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
363 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
364 ieee80211_ready_on_channel(mvm->hw);
365 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
366 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
367 }
368 } else {
369 IWL_WARN(mvm, "Got TE with unknown action\n");
370 }
371}
372
373/*
374 * Handle A Aux ROC time event
375 */
376static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
377 struct iwl_time_event_notif *notif)
378{
379 struct iwl_mvm_time_event_data *aux_roc_te = NULL, *te_data;
380
381 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) {
382 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
383 aux_roc_te = te_data;
384 break;
385 }
386 }
387 if (!aux_roc_te) /* Not a Aux ROC time event */
388 return -EINVAL;
389
390 iwl_mvm_te_check_trigger(mvm, notif, te_data);
391
392 IWL_DEBUG_TE(mvm,
393 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n",
394 le32_to_cpu(notif->unique_id),
395 le32_to_cpu(notif->action), le32_to_cpu(notif->status));
396
397 if (!le32_to_cpu(notif->status) ||
398 le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
399 /* End TE, notify mac80211 */
400 ieee80211_remain_on_channel_expired(mvm->hw);
401 iwl_mvm_roc_finished(mvm); /* flush aux queue */
402 list_del(&te_data->list); /* remove from list */
403 te_data->running = false;
404 te_data->vif = NULL;
405 te_data->uid = 0;
406 te_data->id = TE_MAX;
407 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
408 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
409 te_data->running = true;
410 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
411 } else {
412 IWL_DEBUG_TE(mvm,
413 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
414 le32_to_cpu(notif->action));
415 return -EINVAL;
416 }
417
418 return 0;
419}
420
421/*
422 * The Rx handler for time event notifications
423 */
424void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
425 struct iwl_rx_cmd_buffer *rxb)
426{
427 struct iwl_rx_packet *pkt = rxb_addr(rxb);
428 struct iwl_time_event_notif *notif = (void *)pkt->data;
429 struct iwl_mvm_time_event_data *te_data, *tmp;
430
431 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
432 le32_to_cpu(notif->unique_id),
433 le32_to_cpu(notif->action));
434
435 spin_lock_bh(&mvm->time_event_lock);
436 /* This time event is triggered for Aux ROC request */
437 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
438 goto unlock;
439
440 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
441 if (le32_to_cpu(notif->unique_id) == te_data->uid)
442 iwl_mvm_te_handle_notif(mvm, te_data, notif);
443 }
444unlock:
445 spin_unlock_bh(&mvm->time_event_lock);
446}
447
448static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
449 struct iwl_rx_packet *pkt, void *data)
450{
451 struct iwl_mvm *mvm =
452 container_of(notif_wait, struct iwl_mvm, notif_wait);
453 struct iwl_mvm_time_event_data *te_data = data;
454 struct iwl_time_event_notif *resp;
455 int resp_len = iwl_rx_packet_payload_len(pkt);
456
457 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
458 return true;
459
460 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
461 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
462 return true;
463 }
464
465 resp = (void *)pkt->data;
466
467 /* te_data->uid is already set in the TIME_EVENT_CMD response */
468 if (le32_to_cpu(resp->unique_id) != te_data->uid)
469 return false;
470
471 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
472 te_data->uid);
473 if (!resp->status)
474 IWL_ERR(mvm,
475 "TIME_EVENT_NOTIFICATION received but not executed\n");
476
477 return true;
478}
479
480static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
481 struct iwl_rx_packet *pkt, void *data)
482{
483 struct iwl_mvm *mvm =
484 container_of(notif_wait, struct iwl_mvm, notif_wait);
485 struct iwl_mvm_time_event_data *te_data = data;
486 struct iwl_time_event_resp *resp;
487 int resp_len = iwl_rx_packet_payload_len(pkt);
488
489 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
490 return true;
491
492 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
493 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
494 return true;
495 }
496
497 resp = (void *)pkt->data;
498
499 /* we should never get a response to another TIME_EVENT_CMD here */
500 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
501 return false;
502
503 te_data->uid = le32_to_cpu(resp->unique_id);
504 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
505 te_data->uid);
506 return true;
507}
508
509static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
510 struct ieee80211_vif *vif,
511 struct iwl_mvm_time_event_data *te_data,
512 struct iwl_time_event_cmd *te_cmd)
513{
514 static const u16 time_event_response[] = { TIME_EVENT_CMD };
515 struct iwl_notification_wait wait_time_event;
516 int ret;
517
518 lockdep_assert_held(&mvm->mutex);
519
520 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
521 le32_to_cpu(te_cmd->duration));
522
523 spin_lock_bh(&mvm->time_event_lock);
524 if (WARN_ON(te_data->id != TE_MAX)) {
525 spin_unlock_bh(&mvm->time_event_lock);
526 return -EIO;
527 }
528 te_data->vif = vif;
529 te_data->duration = le32_to_cpu(te_cmd->duration);
530 te_data->id = le32_to_cpu(te_cmd->id);
531 list_add_tail(&te_data->list, &mvm->time_event_list);
532 spin_unlock_bh(&mvm->time_event_lock);
533
534 /*
535 * Use a notification wait, which really just processes the
536 * command response and doesn't wait for anything, in order
537 * to be able to process the response and get the UID inside
538 * the RX path. Using CMD_WANT_SKB doesn't work because it
539 * stores the buffer and then wakes up this thread, by which
540 * time another notification (that the time event started)
541 * might already be processed unsuccessfully.
542 */
543 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
544 time_event_response,
545 ARRAY_SIZE(time_event_response),
546 iwl_mvm_time_event_response, te_data);
547
548 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
549 sizeof(*te_cmd), te_cmd);
550 if (ret) {
551 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
552 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
553 goto out_clear_te;
554 }
555
556 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
557 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
558 /* should never fail */
559 WARN_ON_ONCE(ret);
560
561 if (ret) {
562 out_clear_te:
563 spin_lock_bh(&mvm->time_event_lock);
564 iwl_mvm_te_clear_data(mvm, te_data);
565 spin_unlock_bh(&mvm->time_event_lock);
566 }
567 return ret;
568}
569
570void iwl_mvm_protect_session(struct iwl_mvm *mvm,
571 struct ieee80211_vif *vif,
572 u32 duration, u32 min_duration,
573 u32 max_delay, bool wait_for_notif)
574{
575 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
576 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
577 const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
578 struct iwl_notification_wait wait_te_notif;
579 struct iwl_time_event_cmd time_cmd = {};
580
581 lockdep_assert_held(&mvm->mutex);
582
583 if (te_data->running &&
584 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
585 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
586 jiffies_to_msecs(te_data->end_jiffies - jiffies));
587 return;
588 }
589
590 if (te_data->running) {
591 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
592 te_data->uid,
593 jiffies_to_msecs(te_data->end_jiffies - jiffies));
594 /*
595 * we don't have enough time
596 * cancel the current TE and issue a new one
597 * Of course it would be better to remove the old one only
598 * when the new one is added, but we don't care if we are off
599 * channel for a bit. All we need to do, is not to return
600 * before we actually begin to be on the channel.
601 */
602 iwl_mvm_stop_session_protection(mvm, vif);
603 }
604
605 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
606 time_cmd.id_and_color =
607 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
608 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
609
610 time_cmd.apply_time = cpu_to_le32(0);
611
612 time_cmd.max_frags = TE_V2_FRAG_NONE;
613 time_cmd.max_delay = cpu_to_le32(max_delay);
614 /* TODO: why do we need to interval = bi if it is not periodic? */
615 time_cmd.interval = cpu_to_le32(1);
616 time_cmd.duration = cpu_to_le32(duration);
617 time_cmd.repeat = 1;
618 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
619 TE_V2_NOTIF_HOST_EVENT_END |
620 TE_V2_START_IMMEDIATELY);
621
622 if (!wait_for_notif) {
623 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
624 return;
625 }
626
627 /*
628 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
629 * right after we send the time event
630 */
631 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
632 te_notif_response,
633 ARRAY_SIZE(te_notif_response),
634 iwl_mvm_te_notif, te_data);
635
636 /* If TE was sent OK - wait for the notification that started */
637 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
638 IWL_ERR(mvm, "Failed to add TE to protect session\n");
639 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
640 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
641 TU_TO_JIFFIES(max_delay))) {
642 IWL_ERR(mvm, "Failed to protect session until TE\n");
643 }
644}
645
646static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm,
647 struct iwl_mvm_vif *mvmvif,
648 u32 id)
649{
650 struct iwl_mvm_session_prot_cmd cmd = {
651 .id_and_color =
652 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
653 mvmvif->color)),
654 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
655 .conf_id = cpu_to_le32(id),
656 };
657 int ret;
658
659 ret = iwl_mvm_send_cmd_pdu(mvm,
660 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
661 0, sizeof(cmd), &cmd);
662 if (ret)
663 IWL_ERR(mvm,
664 "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret);
665}
666
667static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
668 struct iwl_mvm_time_event_data *te_data,
669 u32 *uid)
670{
671 u32 id;
672 struct iwl_mvm_vif *mvmvif;
673 enum nl80211_iftype iftype;
674
675 if (!te_data->vif)
676 return false;
677
678 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
679 iftype = te_data->vif->type;
680
681 /*
682 * It is possible that by the time we got to this point the time
683 * event was already removed.
684 */
685 spin_lock_bh(&mvm->time_event_lock);
686
687 /* Save time event uid before clearing its data */
688 *uid = te_data->uid;
689 id = te_data->id;
690
691 /*
692 * The clear_data function handles time events that were already removed
693 */
694 iwl_mvm_te_clear_data(mvm, te_data);
695 spin_unlock_bh(&mvm->time_event_lock);
696
697 /* When session protection is used, the te_data->id field
698 * is reused to save session protection's configuration.
699 * For AUX ROC, HOT_SPOT_CMD is used and the te_data->id field is set
700 * to HOT_SPOT_CMD.
701 */
702 if (fw_has_capa(&mvm->fw->ucode_capa,
703 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD) &&
704 id != HOT_SPOT_CMD) {
705 if (mvmvif && id < SESSION_PROTECT_CONF_MAX_ID) {
706 /* Session protection is still ongoing. Cancel it */
707 iwl_mvm_cancel_session_protection(mvm, mvmvif, id);
708 if (iftype == NL80211_IFTYPE_P2P_DEVICE) {
709 iwl_mvm_p2p_roc_finished(mvm);
710 }
711 }
712 return false;
713 } else {
714 /* It is possible that by the time we try to remove it, the
715 * time event has already ended and removed. In such a case
716 * there is no need to send a removal command.
717 */
718 if (id == TE_MAX) {
719 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
720 return false;
721 }
722 }
723
724 return true;
725}
726
727/*
728 * Explicit request to remove a aux roc time event. The removal of a time
729 * event needs to be synchronized with the flow of a time event's end
730 * notification, which also removes the time event from the op mode
731 * data structures.
732 */
733static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
734 struct iwl_mvm_vif *mvmvif,
735 struct iwl_mvm_time_event_data *te_data)
736{
737 struct iwl_hs20_roc_req aux_cmd = {};
738 u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm);
739
740 u32 uid;
741 int ret;
742
743 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
744 return;
745
746 aux_cmd.event_unique_id = cpu_to_le32(uid);
747 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
748 aux_cmd.id_and_color =
749 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
750 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
751 le32_to_cpu(aux_cmd.event_unique_id));
752 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
753 len, &aux_cmd);
754
755 if (WARN_ON(ret))
756 return;
757}
758
759/*
760 * Explicit request to remove a time event. The removal of a time event needs to
761 * be synchronized with the flow of a time event's end notification, which also
762 * removes the time event from the op mode data structures.
763 */
764void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
765 struct iwl_mvm_vif *mvmvif,
766 struct iwl_mvm_time_event_data *te_data)
767{
768 struct iwl_time_event_cmd time_cmd = {};
769 u32 uid;
770 int ret;
771
772 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
773 return;
774
775 /* When we remove a TE, the UID is to be set in the id field */
776 time_cmd.id = cpu_to_le32(uid);
777 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
778 time_cmd.id_and_color =
779 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
780
781 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
782 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
783 sizeof(time_cmd), &time_cmd);
784 if (ret)
785 IWL_ERR(mvm, "Couldn't remove the time event\n");
786}
787
788void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
789 struct ieee80211_vif *vif)
790{
791 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
792 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
793 u32 id;
794
795 lockdep_assert_held(&mvm->mutex);
796
797 spin_lock_bh(&mvm->time_event_lock);
798 id = te_data->id;
799 spin_unlock_bh(&mvm->time_event_lock);
800
801 if (fw_has_capa(&mvm->fw->ucode_capa,
802 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
803 if (id != SESSION_PROTECT_CONF_ASSOC) {
804 IWL_DEBUG_TE(mvm,
805 "don't remove session protection id=%u\n",
806 id);
807 return;
808 }
809 } else if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) {
810 IWL_DEBUG_TE(mvm,
811 "don't remove TE with id=%u (not session protection)\n",
812 id);
813 return;
814 }
815
816 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
817}
818
819void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm,
820 struct iwl_rx_cmd_buffer *rxb)
821{
822 struct iwl_rx_packet *pkt = rxb_addr(rxb);
823 struct iwl_mvm_session_prot_notif *notif = (void *)pkt->data;
824 struct ieee80211_vif *vif;
825 struct iwl_mvm_vif *mvmvif;
826
827 rcu_read_lock();
828 vif = iwl_mvm_rcu_dereference_vif_id(mvm, le32_to_cpu(notif->mac_id),
829 true);
830
831 if (!vif)
832 goto out_unlock;
833
834 mvmvif = iwl_mvm_vif_from_mac80211(vif);
835
836 /* The vif is not a P2P_DEVICE, maintain its time_event_data */
837 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
838 struct iwl_mvm_time_event_data *te_data =
839 &mvmvif->time_event_data;
840
841 if (!le32_to_cpu(notif->status)) {
842 iwl_mvm_te_check_disconnect(mvm, vif,
843 "Session protection failure");
844 spin_lock_bh(&mvm->time_event_lock);
845 iwl_mvm_te_clear_data(mvm, te_data);
846 spin_unlock_bh(&mvm->time_event_lock);
847 }
848
849 if (le32_to_cpu(notif->start)) {
850 spin_lock_bh(&mvm->time_event_lock);
851 te_data->running = le32_to_cpu(notif->start);
852 te_data->end_jiffies =
853 TU_TO_EXP_TIME(te_data->duration);
854 spin_unlock_bh(&mvm->time_event_lock);
855 } else {
856 /*
857 * By now, we should have finished association
858 * and know the dtim period.
859 */
860 iwl_mvm_te_check_disconnect(mvm, vif,
861 !vif->cfg.assoc ?
862 "Not associated and the session protection is over already..." :
863 "No beacon heard and the session protection is over already...");
864 spin_lock_bh(&mvm->time_event_lock);
865 iwl_mvm_te_clear_data(mvm, te_data);
866 spin_unlock_bh(&mvm->time_event_lock);
867 }
868
869 goto out_unlock;
870 }
871
872 if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) {
873 /* End TE, notify mac80211 */
874 mvmvif->time_event_data.id = SESSION_PROTECT_CONF_MAX_ID;
875 ieee80211_remain_on_channel_expired(mvm->hw);
876 iwl_mvm_p2p_roc_finished(mvm);
877 } else if (le32_to_cpu(notif->start)) {
878 if (WARN_ON(mvmvif->time_event_data.id !=
879 le32_to_cpu(notif->conf_id)))
880 goto out_unlock;
881 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
882 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
883 }
884
885 out_unlock:
886 rcu_read_unlock();
887}
888
889static int
890iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm,
891 struct ieee80211_vif *vif,
892 int duration,
893 enum ieee80211_roc_type type)
894{
895 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
896 struct iwl_mvm_session_prot_cmd cmd = {
897 .id_and_color =
898 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
899 mvmvif->color)),
900 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
901 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
902 };
903
904 lockdep_assert_held(&mvm->mutex);
905
906 /* The time_event_data.id field is reused to save session
907 * protection's configuration.
908 */
909 switch (type) {
910 case IEEE80211_ROC_TYPE_NORMAL:
911 mvmvif->time_event_data.id =
912 SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV;
913 break;
914 case IEEE80211_ROC_TYPE_MGMT_TX:
915 mvmvif->time_event_data.id =
916 SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION;
917 break;
918 default:
919 WARN_ONCE(1, "Got an invalid ROC type\n");
920 return -EINVAL;
921 }
922
923 cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id);
924 return iwl_mvm_send_cmd_pdu(mvm,
925 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
926 0, sizeof(cmd), &cmd);
927}
928
929int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
930 int duration, enum ieee80211_roc_type type)
931{
932 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
933 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
934 struct iwl_time_event_cmd time_cmd = {};
935
936 lockdep_assert_held(&mvm->mutex);
937 if (te_data->running) {
938 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
939 return -EBUSY;
940 }
941
942 if (fw_has_capa(&mvm->fw->ucode_capa,
943 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
944 return iwl_mvm_start_p2p_roc_session_protection(mvm, vif,
945 duration,
946 type);
947
948 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
949 time_cmd.id_and_color =
950 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
951
952 switch (type) {
953 case IEEE80211_ROC_TYPE_NORMAL:
954 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
955 break;
956 case IEEE80211_ROC_TYPE_MGMT_TX:
957 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
958 break;
959 default:
960 WARN_ONCE(1, "Got an invalid ROC type\n");
961 return -EINVAL;
962 }
963
964 time_cmd.apply_time = cpu_to_le32(0);
965 time_cmd.interval = cpu_to_le32(1);
966
967 /*
968 * The P2P Device TEs can have lower priority than other events
969 * that are being scheduled by the driver/fw, and thus it might not be
970 * scheduled. To improve the chances of it being scheduled, allow them
971 * to be fragmented, and in addition allow them to be delayed.
972 */
973 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
974 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
975 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
976 time_cmd.repeat = 1;
977 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
978 TE_V2_NOTIF_HOST_EVENT_END |
979 TE_V2_START_IMMEDIATELY);
980
981 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
982}
983
984static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm)
985{
986 struct iwl_mvm_time_event_data *te_data;
987
988 lockdep_assert_held(&mvm->mutex);
989
990 spin_lock_bh(&mvm->time_event_lock);
991
992 /*
993 * Iterate over the list of time events and find the time event that is
994 * associated with a P2P_DEVICE interface.
995 * This assumes that a P2P_DEVICE interface can have only a single time
996 * event at any given time and this time event coresponds to a ROC
997 * request
998 */
999 list_for_each_entry(te_data, &mvm->time_event_list, list) {
1000 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE)
1001 goto out;
1002 }
1003
1004 /* There can only be at most one AUX ROC time event, we just use the
1005 * list to simplify/unify code. Remove it if it exists.
1006 */
1007 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list,
1008 struct iwl_mvm_time_event_data,
1009 list);
1010out:
1011 spin_unlock_bh(&mvm->time_event_lock);
1012 return te_data;
1013}
1014
1015void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm)
1016{
1017 struct iwl_mvm_time_event_data *te_data;
1018 u32 uid;
1019
1020 te_data = iwl_mvm_get_roc_te(mvm);
1021 if (te_data)
1022 __iwl_mvm_remove_time_event(mvm, te_data, &uid);
1023}
1024
1025void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1026{
1027 struct iwl_mvm_vif *mvmvif;
1028 struct iwl_mvm_time_event_data *te_data;
1029
1030 if (fw_has_capa(&mvm->fw->ucode_capa,
1031 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
1032 mvmvif = iwl_mvm_vif_from_mac80211(vif);
1033
1034 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1035 iwl_mvm_cancel_session_protection(mvm, mvmvif,
1036 mvmvif->time_event_data.id);
1037 iwl_mvm_p2p_roc_finished(mvm);
1038 } else {
1039 iwl_mvm_remove_aux_roc_te(mvm, mvmvif,
1040 &mvmvif->hs_time_event_data);
1041 iwl_mvm_roc_finished(mvm);
1042 }
1043
1044 return;
1045 }
1046
1047 te_data = iwl_mvm_get_roc_te(mvm);
1048 if (!te_data) {
1049 IWL_WARN(mvm, "No remain on channel event\n");
1050 return;
1051 }
1052
1053 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
1054
1055 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1056 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1057 iwl_mvm_p2p_roc_finished(mvm);
1058 } else {
1059 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
1060 iwl_mvm_roc_finished(mvm);
1061 }
1062}
1063
1064void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm,
1065 struct ieee80211_vif *vif)
1066{
1067 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1068 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1069 u32 id;
1070
1071 lockdep_assert_held(&mvm->mutex);
1072
1073 spin_lock_bh(&mvm->time_event_lock);
1074 id = te_data->id;
1075 spin_unlock_bh(&mvm->time_event_lock);
1076
1077 if (id != TE_CHANNEL_SWITCH_PERIOD)
1078 return;
1079
1080 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1081}
1082
1083int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
1084 struct ieee80211_vif *vif,
1085 u32 duration, u32 apply_time)
1086{
1087 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1088 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1089 struct iwl_time_event_cmd time_cmd = {};
1090
1091 lockdep_assert_held(&mvm->mutex);
1092
1093 if (te_data->running) {
1094 u32 id;
1095
1096 spin_lock_bh(&mvm->time_event_lock);
1097 id = te_data->id;
1098 spin_unlock_bh(&mvm->time_event_lock);
1099
1100 if (id == TE_CHANNEL_SWITCH_PERIOD) {
1101 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
1102 return -EBUSY;
1103 }
1104
1105 /*
1106 * Remove the session protection time event to allow the
1107 * channel switch. If we got here, we just heard a beacon so
1108 * the session protection is not needed anymore anyway.
1109 */
1110 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1111 }
1112
1113 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1114 time_cmd.id_and_color =
1115 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1116 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
1117 time_cmd.apply_time = cpu_to_le32(apply_time);
1118 time_cmd.max_frags = TE_V2_FRAG_NONE;
1119 time_cmd.duration = cpu_to_le32(duration);
1120 time_cmd.repeat = 1;
1121 time_cmd.interval = cpu_to_le32(1);
1122 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1123 TE_V2_ABSENCE);
1124 if (!apply_time)
1125 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY);
1126
1127 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1128}
1129
1130static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait,
1131 struct iwl_rx_packet *pkt, void *data)
1132{
1133 struct iwl_mvm *mvm =
1134 container_of(notif_wait, struct iwl_mvm, notif_wait);
1135 struct iwl_mvm_session_prot_notif *resp;
1136 int resp_len = iwl_rx_packet_payload_len(pkt);
1137
1138 if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF ||
1139 pkt->hdr.group_id != MAC_CONF_GROUP))
1140 return true;
1141
1142 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
1143 IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n");
1144 return true;
1145 }
1146
1147 resp = (void *)pkt->data;
1148
1149 if (!resp->status)
1150 IWL_ERR(mvm,
1151 "TIME_EVENT_NOTIFICATION received but not executed\n");
1152
1153 return true;
1154}
1155
1156void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
1157 struct ieee80211_vif *vif,
1158 u32 duration, u32 min_duration,
1159 bool wait_for_notif)
1160{
1161 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1162 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1163 const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) };
1164 struct iwl_notification_wait wait_notif;
1165 struct iwl_mvm_session_prot_cmd cmd = {
1166 .id_and_color =
1167 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1168 mvmvif->color)),
1169 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1170 .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC),
1171 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1172 };
1173
1174 lockdep_assert_held(&mvm->mutex);
1175
1176 spin_lock_bh(&mvm->time_event_lock);
1177 if (te_data->running &&
1178 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
1179 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
1180 jiffies_to_msecs(te_data->end_jiffies - jiffies));
1181 spin_unlock_bh(&mvm->time_event_lock);
1182
1183 return;
1184 }
1185
1186 iwl_mvm_te_clear_data(mvm, te_data);
1187 /*
1188 * The time_event_data.id field is reused to save session
1189 * protection's configuration.
1190 */
1191 te_data->id = le32_to_cpu(cmd.conf_id);
1192 te_data->duration = le32_to_cpu(cmd.duration_tu);
1193 te_data->vif = vif;
1194 spin_unlock_bh(&mvm->time_event_lock);
1195
1196 IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n",
1197 le32_to_cpu(cmd.duration_tu));
1198
1199 if (!wait_for_notif) {
1200 if (iwl_mvm_send_cmd_pdu(mvm,
1201 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1202 0, sizeof(cmd), &cmd)) {
1203 IWL_ERR(mvm,
1204 "Couldn't send the SESSION_PROTECTION_CMD\n");
1205 spin_lock_bh(&mvm->time_event_lock);
1206 iwl_mvm_te_clear_data(mvm, te_data);
1207 spin_unlock_bh(&mvm->time_event_lock);
1208 }
1209
1210 return;
1211 }
1212
1213 iwl_init_notification_wait(&mvm->notif_wait, &wait_notif,
1214 notif, ARRAY_SIZE(notif),
1215 iwl_mvm_session_prot_notif, NULL);
1216
1217 if (iwl_mvm_send_cmd_pdu(mvm,
1218 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1219 0, sizeof(cmd), &cmd)) {
1220 IWL_ERR(mvm,
1221 "Couldn't send the SESSION_PROTECTION_CMD\n");
1222 iwl_remove_notification(&mvm->notif_wait, &wait_notif);
1223 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif,
1224 TU_TO_JIFFIES(100))) {
1225 IWL_ERR(mvm,
1226 "Failed to protect session until session protection\n");
1227 }
1228}