1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
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39 * modification, are permitted provided that the following conditions
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45 * notice, this list of conditions and the following disclaimer in
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50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
66 #include <linux/jiffies.h>
67 #include <net/mac80211.h>
69 #include "iwl-notif-wait.h"
70 #include "iwl-trans.h"
72 #include "time-event.h"
78 * For the high priority TE use a time event type that has similar priority to
79 * the FW's action scan priority.
81 #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE
82 #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC
84 void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
85 struct iwl_mvm_time_event_data *te_data)
87 lockdep_assert_held(&mvm->time_event_lock);
89 if (te_data->id == TE_MAX)
92 list_del(&te_data->list);
93 te_data->running = false;
99 void iwl_mvm_roc_done_wk(struct work_struct *wk)
101 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk);
105 * Clear the ROC_RUNNING /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).
111 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
112 queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE);
113 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
114 queues |= BIT(mvm->aux_queue);
116 iwl_mvm_unref(mvm, IWL_MVM_REF_ROC);
121 * Flush the offchannel queue -- this is called when the time
122 * event finishes or is cancelled, so that frames queued for it
123 * won't get stuck on the queue and be transmitted in the next
125 * We have to send the command asynchronously since this cannot
126 * be under the mutex for locking reasons, but that's not an
127 * issue as it will have to complete before the next command is
128 * executed, and a new time event means a new command.
130 iwl_mvm_flush_tx_path(mvm, queues, false);
133 static void iwl_mvm_roc_finished(struct iwl_mvm *mvm)
136 * Of course, our status bit is just as racy as mac80211, so in
137 * addition, fire off the work struct which will drop all frames
138 * from the hardware queues that made it through the race. First
139 * it will of course synchronize the TX path to make sure that
140 * any *new* TX will be rejected.
142 schedule_work(&mvm->roc_done_wk);
145 static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm)
147 struct ieee80211_vif *csa_vif;
151 csa_vif = rcu_dereference(mvm->csa_vif);
152 if (!csa_vif || !csa_vif->csa_active)
155 IWL_DEBUG_TE(mvm, "CSA NOA started\n");
158 * CSA NoA is started but we still have beacons to
159 * transmit on the current channel.
160 * So we just do nothing here and the switch
161 * will be performed on the last TBTT.
163 if (!ieee80211_csa_is_complete(csa_vif)) {
164 IWL_WARN(mvm, "CSA NOA started too early\n");
168 ieee80211_csa_finish(csa_vif);
172 RCU_INIT_POINTER(mvm->csa_vif, NULL);
180 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm,
181 struct ieee80211_vif *vif,
184 if (vif->type != NL80211_IFTYPE_STATION)
186 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period)
189 IWL_ERR(mvm, "%s\n", errmsg);
190 ieee80211_connection_loss(vif);
195 iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
196 struct iwl_mvm_time_event_data *te_data,
197 struct iwl_time_event_notif *notif)
199 if (!le32_to_cpu(notif->status)) {
200 if (te_data->vif->type == NL80211_IFTYPE_STATION)
201 ieee80211_connection_loss(te_data->vif);
202 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n");
203 iwl_mvm_te_clear_data(mvm, te_data);
207 switch (te_data->vif->type) {
208 case NL80211_IFTYPE_AP:
209 iwl_mvm_csa_noa_start(mvm);
211 case NL80211_IFTYPE_STATION:
212 iwl_mvm_csa_client_absent(mvm, te_data->vif);
213 ieee80211_chswitch_done(te_data->vif, true);
216 /* should never happen */
221 /* we don't need it anymore */
222 iwl_mvm_te_clear_data(mvm, te_data);
226 * Handles a FW notification for an event that is known to the driver.
228 * @mvm: the mvm component
229 * @te_data: the time event data
230 * @notif: the notification data corresponding the time event data.
232 static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm,
233 struct iwl_mvm_time_event_data *te_data,
234 struct iwl_time_event_notif *notif)
236 lockdep_assert_held(&mvm->time_event_lock);
238 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n",
239 le32_to_cpu(notif->unique_id),
240 le32_to_cpu(notif->action));
243 * The FW sends the start/end time event notifications even for events
244 * that it fails to schedule. This is indicated in the status field of
245 * the notification. This happens in cases that the scheduler cannot
246 * find a schedule that can handle the event (for example requesting a
247 * P2P Device discoveribility, while there are other higher priority
248 * events in the system).
250 if (!le32_to_cpu(notif->status)) {
251 bool start = le32_to_cpu(notif->action) &
252 TE_V2_NOTIF_HOST_EVENT_START;
253 IWL_WARN(mvm, "Time Event %s notification failure\n",
254 start ? "start" : "end");
255 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) {
256 iwl_mvm_te_clear_data(mvm, te_data);
261 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) {
263 "TE ended - current time %lu, estimated end %lu\n",
264 jiffies, te_data->end_jiffies);
266 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
267 ieee80211_remain_on_channel_expired(mvm->hw);
268 iwl_mvm_roc_finished(mvm);
272 * By now, we should have finished association
273 * and know the dtim period.
275 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
276 "No association and the time event is over already...");
277 iwl_mvm_te_clear_data(mvm, te_data);
278 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
279 te_data->running = true;
280 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
282 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
283 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
284 iwl_mvm_ref(mvm, IWL_MVM_REF_ROC);
285 ieee80211_ready_on_channel(mvm->hw);
286 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
287 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
290 IWL_WARN(mvm, "Got TE with unknown action\n");
295 * Handle A Aux ROC time event
297 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
298 struct iwl_time_event_notif *notif)
300 struct iwl_mvm_time_event_data *te_data, *tmp;
301 bool aux_roc_te = false;
303 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) {
304 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
309 if (!aux_roc_te) /* Not a Aux ROC time event */
312 if (!le32_to_cpu(notif->status)) {
314 "ERROR: Aux ROC Time Event %s notification failure\n",
315 (le32_to_cpu(notif->action) &
316 TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end");
321 "Aux ROC time event notification - UID = 0x%x action %d\n",
322 le32_to_cpu(notif->unique_id),
323 le32_to_cpu(notif->action));
325 if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
326 /* End TE, notify mac80211 */
327 ieee80211_remain_on_channel_expired(mvm->hw);
328 iwl_mvm_roc_finished(mvm); /* flush aux queue */
329 list_del(&te_data->list); /* remove from list */
330 te_data->running = false;
333 te_data->id = TE_MAX;
334 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
335 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
336 te_data->running = true;
337 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
340 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
341 le32_to_cpu(notif->action));
349 * The Rx handler for time event notifications
351 int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
352 struct iwl_rx_cmd_buffer *rxb,
353 struct iwl_device_cmd *cmd)
355 struct iwl_rx_packet *pkt = rxb_addr(rxb);
356 struct iwl_time_event_notif *notif = (void *)pkt->data;
357 struct iwl_mvm_time_event_data *te_data, *tmp;
359 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
360 le32_to_cpu(notif->unique_id),
361 le32_to_cpu(notif->action));
363 spin_lock_bh(&mvm->time_event_lock);
364 /* This time event is triggered for Aux ROC request */
365 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
368 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
369 if (le32_to_cpu(notif->unique_id) == te_data->uid)
370 iwl_mvm_te_handle_notif(mvm, te_data, notif);
373 spin_unlock_bh(&mvm->time_event_lock);
378 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
379 struct iwl_rx_packet *pkt, void *data)
381 struct iwl_mvm *mvm =
382 container_of(notif_wait, struct iwl_mvm, notif_wait);
383 struct iwl_mvm_time_event_data *te_data = data;
384 struct iwl_time_event_notif *resp;
385 int resp_len = iwl_rx_packet_payload_len(pkt);
387 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
390 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
391 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
395 resp = (void *)pkt->data;
397 /* te_data->uid is already set in the TIME_EVENT_CMD response */
398 if (le32_to_cpu(resp->unique_id) != te_data->uid)
401 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
405 "TIME_EVENT_NOTIFICATION received but not executed\n");
410 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
411 struct iwl_rx_packet *pkt, void *data)
413 struct iwl_mvm *mvm =
414 container_of(notif_wait, struct iwl_mvm, notif_wait);
415 struct iwl_mvm_time_event_data *te_data = data;
416 struct iwl_time_event_resp *resp;
417 int resp_len = iwl_rx_packet_payload_len(pkt);
419 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
422 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
423 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
427 resp = (void *)pkt->data;
429 /* we should never get a response to another TIME_EVENT_CMD here */
430 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
433 te_data->uid = le32_to_cpu(resp->unique_id);
434 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
439 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
440 struct ieee80211_vif *vif,
441 struct iwl_mvm_time_event_data *te_data,
442 struct iwl_time_event_cmd *te_cmd)
444 static const u8 time_event_response[] = { TIME_EVENT_CMD };
445 struct iwl_notification_wait wait_time_event;
448 lockdep_assert_held(&mvm->mutex);
450 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
451 le32_to_cpu(te_cmd->duration));
453 spin_lock_bh(&mvm->time_event_lock);
454 if (WARN_ON(te_data->id != TE_MAX)) {
455 spin_unlock_bh(&mvm->time_event_lock);
459 te_data->duration = le32_to_cpu(te_cmd->duration);
460 te_data->id = le32_to_cpu(te_cmd->id);
461 list_add_tail(&te_data->list, &mvm->time_event_list);
462 spin_unlock_bh(&mvm->time_event_lock);
465 * Use a notification wait, which really just processes the
466 * command response and doesn't wait for anything, in order
467 * to be able to process the response and get the UID inside
468 * the RX path. Using CMD_WANT_SKB doesn't work because it
469 * stores the buffer and then wakes up this thread, by which
470 * time another notification (that the time event started)
471 * might already be processed unsuccessfully.
473 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
475 ARRAY_SIZE(time_event_response),
476 iwl_mvm_time_event_response, te_data);
478 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
479 sizeof(*te_cmd), te_cmd);
481 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
482 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
486 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
487 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
488 /* should never fail */
493 spin_lock_bh(&mvm->time_event_lock);
494 iwl_mvm_te_clear_data(mvm, te_data);
495 spin_unlock_bh(&mvm->time_event_lock);
500 void iwl_mvm_protect_session(struct iwl_mvm *mvm,
501 struct ieee80211_vif *vif,
502 u32 duration, u32 min_duration,
503 u32 max_delay, bool wait_for_notif)
505 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
506 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
507 const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
508 struct iwl_notification_wait wait_te_notif;
509 struct iwl_time_event_cmd time_cmd = {};
511 lockdep_assert_held(&mvm->mutex);
513 if (te_data->running &&
514 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
515 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
516 jiffies_to_msecs(te_data->end_jiffies - jiffies));
520 if (te_data->running) {
521 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
523 jiffies_to_msecs(te_data->end_jiffies - jiffies));
525 * we don't have enough time
526 * cancel the current TE and issue a new one
527 * Of course it would be better to remove the old one only
528 * when the new one is added, but we don't care if we are off
529 * channel for a bit. All we need to do, is not to return
530 * before we actually begin to be on the channel.
532 iwl_mvm_stop_session_protection(mvm, vif);
535 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
536 time_cmd.id_and_color =
537 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
538 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
540 time_cmd.apply_time =
541 cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG));
543 time_cmd.max_frags = TE_V2_FRAG_NONE;
544 time_cmd.max_delay = cpu_to_le32(max_delay);
545 /* TODO: why do we need to interval = bi if it is not periodic? */
546 time_cmd.interval = cpu_to_le32(1);
547 time_cmd.duration = cpu_to_le32(duration);
549 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
550 TE_V2_NOTIF_HOST_EVENT_END |
551 T2_V2_START_IMMEDIATELY);
553 if (!wait_for_notif) {
554 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
559 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
560 * right after we send the time event
562 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
564 ARRAY_SIZE(te_notif_response),
565 iwl_mvm_te_notif, te_data);
567 /* If TE was sent OK - wait for the notification that started */
568 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
569 IWL_ERR(mvm, "Failed to add TE to protect session\n");
570 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
571 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
572 TU_TO_JIFFIES(max_delay))) {
573 IWL_ERR(mvm, "Failed to protect session until TE\n");
577 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
578 struct iwl_mvm_time_event_data *te_data,
584 * It is possible that by the time we got to this point the time
585 * event was already removed.
587 spin_lock_bh(&mvm->time_event_lock);
589 /* Save time event uid before clearing its data */
594 * The clear_data function handles time events that were already removed
596 iwl_mvm_te_clear_data(mvm, te_data);
597 spin_unlock_bh(&mvm->time_event_lock);
600 * It is possible that by the time we try to remove it, the time event
601 * has already ended and removed. In such a case there is no need to
602 * send a removal command.
605 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
613 * Explicit request to remove a aux roc time event. The removal of a time
614 * event needs to be synchronized with the flow of a time event's end
615 * notification, which also removes the time event from the op mode
618 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
619 struct iwl_mvm_vif *mvmvif,
620 struct iwl_mvm_time_event_data *te_data)
622 struct iwl_hs20_roc_req aux_cmd = {};
626 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
629 aux_cmd.event_unique_id = cpu_to_le32(uid);
630 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
631 aux_cmd.id_and_color =
632 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
633 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
634 le32_to_cpu(aux_cmd.event_unique_id));
635 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
636 sizeof(aux_cmd), &aux_cmd);
643 * Explicit request to remove a time event. The removal of a time event needs to
644 * be synchronized with the flow of a time event's end notification, which also
645 * removes the time event from the op mode data structures.
647 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
648 struct iwl_mvm_vif *mvmvif,
649 struct iwl_mvm_time_event_data *te_data)
651 struct iwl_time_event_cmd time_cmd = {};
655 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
658 /* When we remove a TE, the UID is to be set in the id field */
659 time_cmd.id = cpu_to_le32(uid);
660 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
661 time_cmd.id_and_color =
662 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
664 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
665 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
666 sizeof(time_cmd), &time_cmd);
671 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
672 struct ieee80211_vif *vif)
674 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
675 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
677 lockdep_assert_held(&mvm->mutex);
678 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
681 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
682 int duration, enum ieee80211_roc_type type)
684 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
685 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
686 struct iwl_time_event_cmd time_cmd = {};
688 lockdep_assert_held(&mvm->mutex);
689 if (te_data->running) {
690 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
695 * Flush the done work, just in case it's still pending, so that
696 * the work it does can complete and we can accept new frames.
698 flush_work(&mvm->roc_done_wk);
700 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
701 time_cmd.id_and_color =
702 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
705 case IEEE80211_ROC_TYPE_NORMAL:
706 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
708 case IEEE80211_ROC_TYPE_MGMT_TX:
709 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
712 WARN_ONCE(1, "Got an invalid ROC type\n");
716 time_cmd.apply_time = cpu_to_le32(0);
717 time_cmd.interval = cpu_to_le32(1);
720 * The P2P Device TEs can have lower priority than other events
721 * that are being scheduled by the driver/fw, and thus it might not be
722 * scheduled. To improve the chances of it being scheduled, allow them
723 * to be fragmented, and in addition allow them to be delayed.
725 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
726 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
727 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
729 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
730 TE_V2_NOTIF_HOST_EVENT_END |
731 T2_V2_START_IMMEDIATELY);
733 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
736 void iwl_mvm_stop_roc(struct iwl_mvm *mvm)
738 struct iwl_mvm_vif *mvmvif;
739 struct iwl_mvm_time_event_data *te_data;
742 lockdep_assert_held(&mvm->mutex);
745 spin_lock_bh(&mvm->time_event_lock);
748 * Iterate over the list of time events and find the time event that is
749 * associated with a P2P_DEVICE interface.
750 * This assumes that a P2P_DEVICE interface can have only a single time
751 * event at any given time and this time event coresponds to a ROC
754 list_for_each_entry(te_data, &mvm->time_event_list, list) {
755 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
756 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
763 * Iterate over the list of aux roc time events and find the time
764 * event that is associated with a BSS interface.
765 * This assumes that a BSS interface can have only a single time
766 * event at any given time and this time event coresponds to a ROC
769 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) {
770 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
775 spin_unlock_bh(&mvm->time_event_lock);
778 IWL_WARN(mvm, "No remain on channel event\n");
783 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
785 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
787 iwl_mvm_roc_finished(mvm);
790 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
791 struct ieee80211_vif *vif,
792 u32 duration, u32 apply_time)
794 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
795 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
796 struct iwl_time_event_cmd time_cmd = {};
798 lockdep_assert_held(&mvm->mutex);
800 if (te_data->running) {
801 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
805 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
806 time_cmd.id_and_color =
807 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
808 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
809 time_cmd.apply_time = cpu_to_le32(apply_time);
810 time_cmd.max_frags = TE_V2_FRAG_NONE;
811 time_cmd.duration = cpu_to_le32(duration);
813 time_cmd.interval = cpu_to_le32(1);
814 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
817 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);