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
iwl_mvm_te_clear_data(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data)25 void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
26 struct iwl_mvm_time_event_data *te_data)
27 {
28 lockdep_assert_held(&mvm->time_event_lock);
29
30 if (!te_data || !te_data->vif)
31 return;
32
33 list_del(&te_data->list);
34
35 /*
36 * the list is only used for AUX ROC events so make sure it is always
37 * initialized
38 */
39 INIT_LIST_HEAD(&te_data->list);
40
41 te_data->running = false;
42 te_data->uid = 0;
43 te_data->id = TE_MAX;
44 te_data->vif = NULL;
45 }
46
iwl_mvm_roc_done_wk(struct work_struct * wk)47 void 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
iwl_mvm_roc_finished(struct iwl_mvm * mvm)107 static 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
iwl_mvm_csa_noa_start(struct iwl_mvm * mvm)119 static 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
150 out_unlock:
151 rcu_read_unlock();
152 }
153
iwl_mvm_te_check_disconnect(struct iwl_mvm * mvm,struct ieee80211_vif * vif,const char * errmsg)154 static 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
193 static void
iwl_mvm_te_handle_notify_csa(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data,struct iwl_time_event_notif * notif)194 iwl_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
iwl_mvm_te_check_trigger(struct iwl_mvm * mvm,struct iwl_time_event_notif * notif,struct iwl_mvm_time_event_data * te_data)230 static 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
iwl_mvm_p2p_roc_finished(struct iwl_mvm * mvm)267 static 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 */
iwl_mvm_te_handle_notif(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data,struct iwl_time_event_notif * notif)286 static 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 */
iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm * mvm,struct iwl_time_event_notif * notif)376 static 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 *te_data, *tmp;
380 bool aux_roc_te = false;
381
382 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) {
383 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
384 aux_roc_te = true;
385 break;
386 }
387 }
388 if (!aux_roc_te) /* Not a Aux ROC time event */
389 return -EINVAL;
390
391 iwl_mvm_te_check_trigger(mvm, notif, te_data);
392
393 IWL_DEBUG_TE(mvm,
394 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n",
395 le32_to_cpu(notif->unique_id),
396 le32_to_cpu(notif->action), le32_to_cpu(notif->status));
397
398 if (!le32_to_cpu(notif->status) ||
399 le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
400 /* End TE, notify mac80211 */
401 ieee80211_remain_on_channel_expired(mvm->hw);
402 iwl_mvm_roc_finished(mvm); /* flush aux queue */
403 list_del(&te_data->list); /* remove from list */
404 te_data->running = false;
405 te_data->vif = NULL;
406 te_data->uid = 0;
407 te_data->id = TE_MAX;
408 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
409 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
410 te_data->running = true;
411 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
412 } else {
413 IWL_DEBUG_TE(mvm,
414 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
415 le32_to_cpu(notif->action));
416 return -EINVAL;
417 }
418
419 return 0;
420 }
421
422 /*
423 * The Rx handler for time event notifications
424 */
iwl_mvm_rx_time_event_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)425 void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
426 struct iwl_rx_cmd_buffer *rxb)
427 {
428 struct iwl_rx_packet *pkt = rxb_addr(rxb);
429 struct iwl_time_event_notif *notif = (void *)pkt->data;
430 struct iwl_mvm_time_event_data *te_data, *tmp;
431
432 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
433 le32_to_cpu(notif->unique_id),
434 le32_to_cpu(notif->action));
435
436 spin_lock_bh(&mvm->time_event_lock);
437 /* This time event is triggered for Aux ROC request */
438 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
439 goto unlock;
440
441 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
442 if (le32_to_cpu(notif->unique_id) == te_data->uid)
443 iwl_mvm_te_handle_notif(mvm, te_data, notif);
444 }
445 unlock:
446 spin_unlock_bh(&mvm->time_event_lock);
447 }
448
iwl_mvm_te_notif(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)449 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
450 struct iwl_rx_packet *pkt, void *data)
451 {
452 struct iwl_mvm *mvm =
453 container_of(notif_wait, struct iwl_mvm, notif_wait);
454 struct iwl_mvm_time_event_data *te_data = data;
455 struct iwl_time_event_notif *resp;
456 int resp_len = iwl_rx_packet_payload_len(pkt);
457
458 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
459 return true;
460
461 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
462 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
463 return true;
464 }
465
466 resp = (void *)pkt->data;
467
468 /* te_data->uid is already set in the TIME_EVENT_CMD response */
469 if (le32_to_cpu(resp->unique_id) != te_data->uid)
470 return false;
471
472 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
473 te_data->uid);
474 if (!resp->status)
475 IWL_ERR(mvm,
476 "TIME_EVENT_NOTIFICATION received but not executed\n");
477
478 return true;
479 }
480
iwl_mvm_time_event_response(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)481 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
482 struct iwl_rx_packet *pkt, void *data)
483 {
484 struct iwl_mvm *mvm =
485 container_of(notif_wait, struct iwl_mvm, notif_wait);
486 struct iwl_mvm_time_event_data *te_data = data;
487 struct iwl_time_event_resp *resp;
488 int resp_len = iwl_rx_packet_payload_len(pkt);
489
490 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
491 return true;
492
493 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
494 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
495 return true;
496 }
497
498 resp = (void *)pkt->data;
499
500 /* we should never get a response to another TIME_EVENT_CMD here */
501 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
502 return false;
503
504 te_data->uid = le32_to_cpu(resp->unique_id);
505 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
506 te_data->uid);
507 return true;
508 }
509
iwl_mvm_time_event_send_add(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_time_event_data * te_data,struct iwl_time_event_cmd * te_cmd)510 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
511 struct ieee80211_vif *vif,
512 struct iwl_mvm_time_event_data *te_data,
513 struct iwl_time_event_cmd *te_cmd)
514 {
515 static const u16 time_event_response[] = { TIME_EVENT_CMD };
516 struct iwl_notification_wait wait_time_event;
517 int ret;
518
519 lockdep_assert_held(&mvm->mutex);
520
521 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
522 le32_to_cpu(te_cmd->duration));
523
524 spin_lock_bh(&mvm->time_event_lock);
525 if (WARN_ON(te_data->id != TE_MAX)) {
526 spin_unlock_bh(&mvm->time_event_lock);
527 return -EIO;
528 }
529 te_data->vif = vif;
530 te_data->duration = le32_to_cpu(te_cmd->duration);
531 te_data->id = le32_to_cpu(te_cmd->id);
532 list_add_tail(&te_data->list, &mvm->time_event_list);
533 spin_unlock_bh(&mvm->time_event_lock);
534
535 /*
536 * Use a notification wait, which really just processes the
537 * command response and doesn't wait for anything, in order
538 * to be able to process the response and get the UID inside
539 * the RX path. Using CMD_WANT_SKB doesn't work because it
540 * stores the buffer and then wakes up this thread, by which
541 * time another notification (that the time event started)
542 * might already be processed unsuccessfully.
543 */
544 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
545 time_event_response,
546 ARRAY_SIZE(time_event_response),
547 iwl_mvm_time_event_response, te_data);
548
549 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
550 sizeof(*te_cmd), te_cmd);
551 if (ret) {
552 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
553 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
554 goto out_clear_te;
555 }
556
557 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
558 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
559 /* should never fail */
560 WARN_ON_ONCE(ret);
561
562 if (ret) {
563 out_clear_te:
564 spin_lock_bh(&mvm->time_event_lock);
565 iwl_mvm_te_clear_data(mvm, te_data);
566 spin_unlock_bh(&mvm->time_event_lock);
567 }
568 return ret;
569 }
570
iwl_mvm_protect_session(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 duration,u32 min_duration,u32 max_delay,bool wait_for_notif)571 void iwl_mvm_protect_session(struct iwl_mvm *mvm,
572 struct ieee80211_vif *vif,
573 u32 duration, u32 min_duration,
574 u32 max_delay, bool wait_for_notif)
575 {
576 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
577 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
578 const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
579 struct iwl_notification_wait wait_te_notif;
580 struct iwl_time_event_cmd time_cmd = {};
581
582 lockdep_assert_held(&mvm->mutex);
583
584 if (te_data->running &&
585 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
586 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
587 jiffies_to_msecs(te_data->end_jiffies - jiffies));
588 return;
589 }
590
591 if (te_data->running) {
592 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
593 te_data->uid,
594 jiffies_to_msecs(te_data->end_jiffies - jiffies));
595 /*
596 * we don't have enough time
597 * cancel the current TE and issue a new one
598 * Of course it would be better to remove the old one only
599 * when the new one is added, but we don't care if we are off
600 * channel for a bit. All we need to do, is not to return
601 * before we actually begin to be on the channel.
602 */
603 iwl_mvm_stop_session_protection(mvm, vif);
604 }
605
606 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
607 time_cmd.id_and_color =
608 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
609 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
610
611 time_cmd.apply_time = cpu_to_le32(0);
612
613 time_cmd.max_frags = TE_V2_FRAG_NONE;
614 time_cmd.max_delay = cpu_to_le32(max_delay);
615 /* TODO: why do we need to interval = bi if it is not periodic? */
616 time_cmd.interval = cpu_to_le32(1);
617 time_cmd.duration = cpu_to_le32(duration);
618 time_cmd.repeat = 1;
619 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
620 TE_V2_NOTIF_HOST_EVENT_END |
621 TE_V2_START_IMMEDIATELY);
622
623 if (!wait_for_notif) {
624 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
625 return;
626 }
627
628 /*
629 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
630 * right after we send the time event
631 */
632 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
633 te_notif_response,
634 ARRAY_SIZE(te_notif_response),
635 iwl_mvm_te_notif, te_data);
636
637 /* If TE was sent OK - wait for the notification that started */
638 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
639 IWL_ERR(mvm, "Failed to add TE to protect session\n");
640 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
641 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
642 TU_TO_JIFFIES(max_delay))) {
643 IWL_ERR(mvm, "Failed to protect session until TE\n");
644 }
645 }
646
iwl_mvm_cancel_session_protection(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,u32 id)647 static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm,
648 struct iwl_mvm_vif *mvmvif,
649 u32 id)
650 {
651 struct iwl_mvm_session_prot_cmd cmd = {
652 .id_and_color =
653 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
654 mvmvif->color)),
655 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
656 .conf_id = cpu_to_le32(id),
657 };
658 int ret;
659
660 ret = iwl_mvm_send_cmd_pdu(mvm,
661 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
662 0, sizeof(cmd), &cmd);
663 if (ret)
664 IWL_ERR(mvm,
665 "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret);
666 }
667
__iwl_mvm_remove_time_event(struct iwl_mvm * mvm,struct iwl_mvm_time_event_data * te_data,u32 * uid)668 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
669 struct iwl_mvm_time_event_data *te_data,
670 u32 *uid)
671 {
672 u32 id;
673 struct iwl_mvm_vif *mvmvif;
674 enum nl80211_iftype iftype;
675
676 if (!te_data->vif)
677 return false;
678
679 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
680 iftype = te_data->vif->type;
681
682 /*
683 * It is possible that by the time we got to this point the time
684 * event was already removed.
685 */
686 spin_lock_bh(&mvm->time_event_lock);
687
688 /* Save time event uid before clearing its data */
689 *uid = te_data->uid;
690 id = te_data->id;
691
692 /*
693 * The clear_data function handles time events that were already removed
694 */
695 iwl_mvm_te_clear_data(mvm, te_data);
696 spin_unlock_bh(&mvm->time_event_lock);
697
698 /* When session protection is used, the te_data->id field
699 * is reused to save session protection's configuration.
700 * For AUX ROC, HOT_SPOT_CMD is used and the te_data->id field is set
701 * to HOT_SPOT_CMD.
702 */
703 if (fw_has_capa(&mvm->fw->ucode_capa,
704 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD) &&
705 id != HOT_SPOT_CMD) {
706 if (mvmvif && id < SESSION_PROTECT_CONF_MAX_ID) {
707 /* Session protection is still ongoing. Cancel it */
708 iwl_mvm_cancel_session_protection(mvm, mvmvif, id);
709 if (iftype == NL80211_IFTYPE_P2P_DEVICE) {
710 iwl_mvm_p2p_roc_finished(mvm);
711 }
712 }
713 return false;
714 } else {
715 /* It is possible that by the time we try to remove it, the
716 * time event has already ended and removed. In such a case
717 * there is no need to send a removal command.
718 */
719 if (id == TE_MAX) {
720 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
721 return false;
722 }
723 }
724
725 return true;
726 }
727
728 /*
729 * Explicit request to remove a aux roc time event. The removal of a time
730 * event needs to be synchronized with the flow of a time event's end
731 * notification, which also removes the time event from the op mode
732 * data structures.
733 */
iwl_mvm_remove_aux_roc_te(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_time_event_data * te_data)734 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
735 struct iwl_mvm_vif *mvmvif,
736 struct iwl_mvm_time_event_data *te_data)
737 {
738 struct iwl_hs20_roc_req aux_cmd = {};
739 u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm);
740
741 u32 uid;
742 int ret;
743
744 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
745 return;
746
747 aux_cmd.event_unique_id = cpu_to_le32(uid);
748 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
749 aux_cmd.id_and_color =
750 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
751 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
752 le32_to_cpu(aux_cmd.event_unique_id));
753 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
754 len, &aux_cmd);
755
756 if (WARN_ON(ret))
757 return;
758 }
759
760 /*
761 * Explicit request to remove a time event. The removal of a time event needs to
762 * be synchronized with the flow of a time event's end notification, which also
763 * removes the time event from the op mode data structures.
764 */
iwl_mvm_remove_time_event(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_time_event_data * te_data)765 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
766 struct iwl_mvm_vif *mvmvif,
767 struct iwl_mvm_time_event_data *te_data)
768 {
769 struct iwl_time_event_cmd time_cmd = {};
770 u32 uid;
771 int ret;
772
773 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
774 return;
775
776 /* When we remove a TE, the UID is to be set in the id field */
777 time_cmd.id = cpu_to_le32(uid);
778 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
779 time_cmd.id_and_color =
780 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
781
782 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
783 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
784 sizeof(time_cmd), &time_cmd);
785 if (ret)
786 IWL_ERR(mvm, "Couldn't remove the time event\n");
787 }
788
iwl_mvm_stop_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif)789 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
790 struct ieee80211_vif *vif)
791 {
792 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
793 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
794 u32 id;
795
796 lockdep_assert_held(&mvm->mutex);
797
798 spin_lock_bh(&mvm->time_event_lock);
799 id = te_data->id;
800 spin_unlock_bh(&mvm->time_event_lock);
801
802 if (fw_has_capa(&mvm->fw->ucode_capa,
803 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
804 if (id != SESSION_PROTECT_CONF_ASSOC) {
805 IWL_DEBUG_TE(mvm,
806 "don't remove session protection id=%u\n",
807 id);
808 return;
809 }
810 } else if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) {
811 IWL_DEBUG_TE(mvm,
812 "don't remove TE with id=%u (not session protection)\n",
813 id);
814 return;
815 }
816
817 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
818 }
819
iwl_mvm_rx_session_protect_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)820 void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm,
821 struct iwl_rx_cmd_buffer *rxb)
822 {
823 struct iwl_rx_packet *pkt = rxb_addr(rxb);
824 struct iwl_mvm_session_prot_notif *notif = (void *)pkt->data;
825 struct ieee80211_vif *vif;
826 struct iwl_mvm_vif *mvmvif;
827
828 rcu_read_lock();
829 vif = iwl_mvm_rcu_dereference_vif_id(mvm, le32_to_cpu(notif->mac_id),
830 true);
831
832 if (!vif)
833 goto out_unlock;
834
835 mvmvif = iwl_mvm_vif_from_mac80211(vif);
836
837 /* The vif is not a P2P_DEVICE, maintain its time_event_data */
838 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
839 struct iwl_mvm_time_event_data *te_data =
840 &mvmvif->time_event_data;
841
842 if (!le32_to_cpu(notif->status)) {
843 iwl_mvm_te_check_disconnect(mvm, vif,
844 "Session protection failure");
845 spin_lock_bh(&mvm->time_event_lock);
846 iwl_mvm_te_clear_data(mvm, te_data);
847 spin_unlock_bh(&mvm->time_event_lock);
848 }
849
850 if (le32_to_cpu(notif->start)) {
851 spin_lock_bh(&mvm->time_event_lock);
852 te_data->running = le32_to_cpu(notif->start);
853 te_data->end_jiffies =
854 TU_TO_EXP_TIME(te_data->duration);
855 spin_unlock_bh(&mvm->time_event_lock);
856 } else {
857 /*
858 * By now, we should have finished association
859 * and know the dtim period.
860 */
861 iwl_mvm_te_check_disconnect(mvm, vif,
862 !vif->cfg.assoc ?
863 "Not associated and the session protection is over already..." :
864 "No beacon heard and the session protection is over already...");
865 spin_lock_bh(&mvm->time_event_lock);
866 iwl_mvm_te_clear_data(mvm, te_data);
867 spin_unlock_bh(&mvm->time_event_lock);
868 }
869
870 goto out_unlock;
871 }
872
873 if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) {
874 /* End TE, notify mac80211 */
875 mvmvif->time_event_data.id = SESSION_PROTECT_CONF_MAX_ID;
876 ieee80211_remain_on_channel_expired(mvm->hw);
877 iwl_mvm_p2p_roc_finished(mvm);
878 } else if (le32_to_cpu(notif->start)) {
879 if (WARN_ON(mvmvif->time_event_data.id !=
880 le32_to_cpu(notif->conf_id)))
881 goto out_unlock;
882 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
883 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
884 }
885
886 out_unlock:
887 rcu_read_unlock();
888 }
889
890 static int
iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif,int duration,enum ieee80211_roc_type type)891 iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm,
892 struct ieee80211_vif *vif,
893 int duration,
894 enum ieee80211_roc_type type)
895 {
896 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
897 struct iwl_mvm_session_prot_cmd cmd = {
898 .id_and_color =
899 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
900 mvmvif->color)),
901 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
902 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
903 };
904
905 lockdep_assert_held(&mvm->mutex);
906
907 /* The time_event_data.id field is reused to save session
908 * protection's configuration.
909 */
910 switch (type) {
911 case IEEE80211_ROC_TYPE_NORMAL:
912 mvmvif->time_event_data.id =
913 SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV;
914 break;
915 case IEEE80211_ROC_TYPE_MGMT_TX:
916 mvmvif->time_event_data.id =
917 SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION;
918 break;
919 default:
920 WARN_ONCE(1, "Got an invalid ROC type\n");
921 return -EINVAL;
922 }
923
924 cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id);
925 return iwl_mvm_send_cmd_pdu(mvm,
926 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
927 0, sizeof(cmd), &cmd);
928 }
929
iwl_mvm_start_p2p_roc(struct iwl_mvm * mvm,struct ieee80211_vif * vif,int duration,enum ieee80211_roc_type type)930 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
931 int duration, enum ieee80211_roc_type type)
932 {
933 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
934 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
935 struct iwl_time_event_cmd time_cmd = {};
936
937 lockdep_assert_held(&mvm->mutex);
938 if (te_data->running) {
939 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
940 return -EBUSY;
941 }
942
943 if (fw_has_capa(&mvm->fw->ucode_capa,
944 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
945 return iwl_mvm_start_p2p_roc_session_protection(mvm, vif,
946 duration,
947 type);
948
949 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
950 time_cmd.id_and_color =
951 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
952
953 switch (type) {
954 case IEEE80211_ROC_TYPE_NORMAL:
955 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
956 break;
957 case IEEE80211_ROC_TYPE_MGMT_TX:
958 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
959 break;
960 default:
961 WARN_ONCE(1, "Got an invalid ROC type\n");
962 return -EINVAL;
963 }
964
965 time_cmd.apply_time = cpu_to_le32(0);
966 time_cmd.interval = cpu_to_le32(1);
967
968 /*
969 * The P2P Device TEs can have lower priority than other events
970 * that are being scheduled by the driver/fw, and thus it might not be
971 * scheduled. To improve the chances of it being scheduled, allow them
972 * to be fragmented, and in addition allow them to be delayed.
973 */
974 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
975 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
976 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
977 time_cmd.repeat = 1;
978 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
979 TE_V2_NOTIF_HOST_EVENT_END |
980 TE_V2_START_IMMEDIATELY);
981
982 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
983 }
984
iwl_mvm_get_roc_te(struct iwl_mvm * mvm)985 static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm)
986 {
987 struct iwl_mvm_time_event_data *te_data;
988
989 lockdep_assert_held(&mvm->mutex);
990
991 spin_lock_bh(&mvm->time_event_lock);
992
993 /*
994 * Iterate over the list of time events and find the time event that is
995 * associated with a P2P_DEVICE interface.
996 * This assumes that a P2P_DEVICE interface can have only a single time
997 * event at any given time and this time event coresponds to a ROC
998 * request
999 */
1000 list_for_each_entry(te_data, &mvm->time_event_list, list) {
1001 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE)
1002 goto out;
1003 }
1004
1005 /* There can only be at most one AUX ROC time event, we just use the
1006 * list to simplify/unify code. Remove it if it exists.
1007 */
1008 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list,
1009 struct iwl_mvm_time_event_data,
1010 list);
1011 out:
1012 spin_unlock_bh(&mvm->time_event_lock);
1013 return te_data;
1014 }
1015
iwl_mvm_cleanup_roc_te(struct iwl_mvm * mvm)1016 void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm)
1017 {
1018 struct iwl_mvm_time_event_data *te_data;
1019 u32 uid;
1020
1021 te_data = iwl_mvm_get_roc_te(mvm);
1022 if (te_data)
1023 __iwl_mvm_remove_time_event(mvm, te_data, &uid);
1024 }
1025
iwl_mvm_stop_roc(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1026 void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1027 {
1028 struct iwl_mvm_vif *mvmvif;
1029 struct iwl_mvm_time_event_data *te_data;
1030
1031 if (fw_has_capa(&mvm->fw->ucode_capa,
1032 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) {
1033 mvmvif = iwl_mvm_vif_from_mac80211(vif);
1034
1035 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1036 iwl_mvm_cancel_session_protection(mvm, mvmvif,
1037 mvmvif->time_event_data.id);
1038 iwl_mvm_p2p_roc_finished(mvm);
1039 } else {
1040 iwl_mvm_remove_aux_roc_te(mvm, mvmvif,
1041 &mvmvif->hs_time_event_data);
1042 iwl_mvm_roc_finished(mvm);
1043 }
1044
1045 return;
1046 }
1047
1048 te_data = iwl_mvm_get_roc_te(mvm);
1049 if (!te_data) {
1050 IWL_WARN(mvm, "No remain on channel event\n");
1051 return;
1052 }
1053
1054 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
1055
1056 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1057 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1058 iwl_mvm_p2p_roc_finished(mvm);
1059 } else {
1060 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
1061 iwl_mvm_roc_finished(mvm);
1062 }
1063 }
1064
iwl_mvm_remove_csa_period(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1065 void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm,
1066 struct ieee80211_vif *vif)
1067 {
1068 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1069 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1070 u32 id;
1071
1072 lockdep_assert_held(&mvm->mutex);
1073
1074 spin_lock_bh(&mvm->time_event_lock);
1075 id = te_data->id;
1076 spin_unlock_bh(&mvm->time_event_lock);
1077
1078 if (id != TE_CHANNEL_SWITCH_PERIOD)
1079 return;
1080
1081 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1082 }
1083
iwl_mvm_schedule_csa_period(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 duration,u32 apply_time)1084 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
1085 struct ieee80211_vif *vif,
1086 u32 duration, u32 apply_time)
1087 {
1088 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1089 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1090 struct iwl_time_event_cmd time_cmd = {};
1091
1092 lockdep_assert_held(&mvm->mutex);
1093
1094 if (te_data->running) {
1095 u32 id;
1096
1097 spin_lock_bh(&mvm->time_event_lock);
1098 id = te_data->id;
1099 spin_unlock_bh(&mvm->time_event_lock);
1100
1101 if (id == TE_CHANNEL_SWITCH_PERIOD) {
1102 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
1103 return -EBUSY;
1104 }
1105
1106 /*
1107 * Remove the session protection time event to allow the
1108 * channel switch. If we got here, we just heard a beacon so
1109 * the session protection is not needed anymore anyway.
1110 */
1111 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
1112 }
1113
1114 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
1115 time_cmd.id_and_color =
1116 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
1117 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
1118 time_cmd.apply_time = cpu_to_le32(apply_time);
1119 time_cmd.max_frags = TE_V2_FRAG_NONE;
1120 time_cmd.duration = cpu_to_le32(duration);
1121 time_cmd.repeat = 1;
1122 time_cmd.interval = cpu_to_le32(1);
1123 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
1124 TE_V2_ABSENCE);
1125 if (!apply_time)
1126 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY);
1127
1128 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
1129 }
1130
iwl_mvm_session_prot_notif(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)1131 static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait,
1132 struct iwl_rx_packet *pkt, void *data)
1133 {
1134 struct iwl_mvm *mvm =
1135 container_of(notif_wait, struct iwl_mvm, notif_wait);
1136 struct iwl_mvm_session_prot_notif *resp;
1137 int resp_len = iwl_rx_packet_payload_len(pkt);
1138
1139 if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF ||
1140 pkt->hdr.group_id != MAC_CONF_GROUP))
1141 return true;
1142
1143 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
1144 IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n");
1145 return true;
1146 }
1147
1148 resp = (void *)pkt->data;
1149
1150 if (!resp->status)
1151 IWL_ERR(mvm,
1152 "TIME_EVENT_NOTIFICATION received but not executed\n");
1153
1154 return true;
1155 }
1156
iwl_mvm_schedule_session_protection(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 duration,u32 min_duration,bool wait_for_notif)1157 void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
1158 struct ieee80211_vif *vif,
1159 u32 duration, u32 min_duration,
1160 bool wait_for_notif)
1161 {
1162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1163 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
1164 const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) };
1165 struct iwl_notification_wait wait_notif;
1166 struct iwl_mvm_session_prot_cmd cmd = {
1167 .id_and_color =
1168 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1169 mvmvif->color)),
1170 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
1171 .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC),
1172 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
1173 };
1174
1175 lockdep_assert_held(&mvm->mutex);
1176
1177 spin_lock_bh(&mvm->time_event_lock);
1178 if (te_data->running &&
1179 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
1180 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
1181 jiffies_to_msecs(te_data->end_jiffies - jiffies));
1182 spin_unlock_bh(&mvm->time_event_lock);
1183
1184 return;
1185 }
1186
1187 iwl_mvm_te_clear_data(mvm, te_data);
1188 /*
1189 * The time_event_data.id field is reused to save session
1190 * protection's configuration.
1191 */
1192 te_data->id = le32_to_cpu(cmd.conf_id);
1193 te_data->duration = le32_to_cpu(cmd.duration_tu);
1194 te_data->vif = vif;
1195 spin_unlock_bh(&mvm->time_event_lock);
1196
1197 IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n",
1198 le32_to_cpu(cmd.duration_tu));
1199
1200 if (!wait_for_notif) {
1201 if (iwl_mvm_send_cmd_pdu(mvm,
1202 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1203 0, sizeof(cmd), &cmd)) {
1204 IWL_ERR(mvm,
1205 "Couldn't send the SESSION_PROTECTION_CMD\n");
1206 spin_lock_bh(&mvm->time_event_lock);
1207 iwl_mvm_te_clear_data(mvm, te_data);
1208 spin_unlock_bh(&mvm->time_event_lock);
1209 }
1210
1211 return;
1212 }
1213
1214 iwl_init_notification_wait(&mvm->notif_wait, &wait_notif,
1215 notif, ARRAY_SIZE(notif),
1216 iwl_mvm_session_prot_notif, NULL);
1217
1218 if (iwl_mvm_send_cmd_pdu(mvm,
1219 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD),
1220 0, sizeof(cmd), &cmd)) {
1221 IWL_ERR(mvm,
1222 "Couldn't send the SESSION_PROTECTION_CMD\n");
1223 iwl_remove_notification(&mvm->notif_wait, &wait_notif);
1224 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif,
1225 TU_TO_JIFFIES(100))) {
1226 IWL_ERR(mvm,
1227 "Failed to protect session until session protection\n");
1228 }
1229 }
1230