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 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2017 Intel Deutschland GmbH
11 * Copyright(c) 2018 Intel Corporation
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 Intel Corporation
35 * All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *****************************************************************************/
65 #include <linux/jiffies.h>
66 #include <net/mac80211.h>
68 #include "fw/notif-wait.h"
69 #include "iwl-trans.h"
71 #include "time-event.h"
77 * For the high priority TE use a time event type that has similar priority to
78 * the FW's action scan priority.
80 #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE
81 #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC
83 void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
84 struct iwl_mvm_time_event_data *te_data)
86 lockdep_assert_held(&mvm->time_event_lock);
91 list_del(&te_data->list);
92 te_data->running = false;
98 void iwl_mvm_roc_done_wk(struct work_struct *wk)
100 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk);
104 * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit.
105 * This will cause the TX path to drop offchannel transmissions.
106 * That would also be done by mac80211, but it is racy, in particular
107 * in the case that the time event actually completed in the firmware
108 * (which is handled in iwl_mvm_te_handle_notif).
110 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) {
111 queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE);
112 iwl_mvm_unref(mvm, IWL_MVM_REF_ROC);
114 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) {
115 queues |= BIT(mvm->aux_queue);
116 iwl_mvm_unref(mvm, IWL_MVM_REF_ROC_AUX);
122 * Flush the offchannel queue -- this is called when the time
123 * event finishes or is canceled, so that frames queued for it
124 * won't get stuck on the queue and be transmitted in the next
126 * We have to send the command asynchronously since this cannot
127 * be under the mutex for locking reasons, but that's not an
128 * issue as it will have to complete before the next command is
129 * executed, and a new time event means a new command.
131 iwl_mvm_flush_sta(mvm, &mvm->aux_sta, true, CMD_ASYNC);
133 /* Do the same for the P2P device queue (STA) */
134 if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) {
135 struct iwl_mvm_vif *mvmvif;
138 * NB: access to this pointer would be racy, but the flush bit
139 * can only be set when we had a P2P-Device VIF, and we have a
140 * flush of this work in iwl_mvm_prepare_mac_removal() so it's
144 if (!WARN_ON(!mvm->p2p_device_vif)) {
145 mvmvif = iwl_mvm_vif_from_mac80211(mvm->p2p_device_vif);
146 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true,
152 static void iwl_mvm_roc_finished(struct iwl_mvm *mvm)
155 * Of course, our status bit is just as racy as mac80211, so in
156 * addition, fire off the work struct which will drop all frames
157 * from the hardware queues that made it through the race. First
158 * it will of course synchronize the TX path to make sure that
159 * any *new* TX will be rejected.
161 schedule_work(&mvm->roc_done_wk);
164 static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm)
166 struct ieee80211_vif *csa_vif;
170 csa_vif = rcu_dereference(mvm->csa_vif);
171 if (!csa_vif || !csa_vif->csa_active)
174 IWL_DEBUG_TE(mvm, "CSA NOA started\n");
177 * CSA NoA is started but we still have beacons to
178 * transmit on the current channel.
179 * So we just do nothing here and the switch
180 * will be performed on the last TBTT.
182 if (!ieee80211_csa_is_complete(csa_vif)) {
183 IWL_WARN(mvm, "CSA NOA started too early\n");
187 ieee80211_csa_finish(csa_vif);
191 RCU_INIT_POINTER(mvm->csa_vif, NULL);
199 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm,
200 struct ieee80211_vif *vif,
203 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
205 if (vif->type != NL80211_IFTYPE_STATION)
208 if (!mvmvif->csa_bcn_pending && vif->bss_conf.assoc &&
209 vif->bss_conf.dtim_period)
212 IWL_ERR(mvm, "%s\n", errmsg);
214 iwl_mvm_connection_loss(mvm, vif, errmsg);
219 iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
220 struct iwl_mvm_time_event_data *te_data,
221 struct iwl_time_event_notif *notif)
223 struct ieee80211_vif *vif = te_data->vif;
224 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
227 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n");
229 switch (te_data->vif->type) {
230 case NL80211_IFTYPE_AP:
232 mvmvif->csa_failed = true;
233 iwl_mvm_csa_noa_start(mvm);
235 case NL80211_IFTYPE_STATION:
236 if (!notif->status) {
237 iwl_mvm_connection_loss(mvm, vif,
238 "CSA TE failed to start");
241 iwl_mvm_csa_client_absent(mvm, te_data->vif);
242 ieee80211_chswitch_done(te_data->vif, true);
245 /* should never happen */
250 /* we don't need it anymore */
251 iwl_mvm_te_clear_data(mvm, te_data);
254 static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm,
255 struct iwl_time_event_notif *notif,
256 struct iwl_mvm_time_event_data *te_data)
258 struct iwl_fw_dbg_trigger_tlv *trig;
259 struct iwl_fw_dbg_trigger_time_event *te_trig;
262 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT))
265 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT);
266 te_trig = (void *)trig->data;
268 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
269 ieee80211_vif_to_wdev(te_data->vif),
273 for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) {
274 u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id);
275 u32 trig_action_bitmap =
276 le32_to_cpu(te_trig->time_events[i].action_bitmap);
277 u32 trig_status_bitmap =
278 le32_to_cpu(te_trig->time_events[i].status_bitmap);
280 if (trig_te_id != te_data->id ||
281 !(trig_action_bitmap & le32_to_cpu(notif->action)) ||
282 !(trig_status_bitmap & BIT(le32_to_cpu(notif->status))))
285 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
286 "Time event %d Action 0x%x received status: %d",
288 le32_to_cpu(notif->action),
289 le32_to_cpu(notif->status));
295 * Handles a FW notification for an event that is known to the driver.
297 * @mvm: the mvm component
298 * @te_data: the time event data
299 * @notif: the notification data corresponding the time event data.
301 static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm,
302 struct iwl_mvm_time_event_data *te_data,
303 struct iwl_time_event_notif *notif)
305 lockdep_assert_held(&mvm->time_event_lock);
307 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n",
308 le32_to_cpu(notif->unique_id),
309 le32_to_cpu(notif->action));
311 iwl_mvm_te_check_trigger(mvm, notif, te_data);
314 * The FW sends the start/end time event notifications even for events
315 * that it fails to schedule. This is indicated in the status field of
316 * the notification. This happens in cases that the scheduler cannot
317 * find a schedule that can handle the event (for example requesting a
318 * P2P Device discoveribility, while there are other higher priority
319 * events in the system).
321 if (!le32_to_cpu(notif->status)) {
324 if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START))
325 msg = "Time Event start notification failure";
327 msg = "Time Event end notification failure";
329 IWL_DEBUG_TE(mvm, "%s\n", msg);
331 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) {
332 iwl_mvm_te_clear_data(mvm, te_data);
337 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) {
339 "TE ended - current time %lu, estimated end %lu\n",
340 jiffies, te_data->end_jiffies);
342 switch (te_data->vif->type) {
343 case NL80211_IFTYPE_P2P_DEVICE:
344 ieee80211_remain_on_channel_expired(mvm->hw);
345 iwl_mvm_roc_finished(mvm);
347 case NL80211_IFTYPE_STATION:
349 * By now, we should have finished association
350 * and know the dtim period.
352 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
353 "No beacon heard and the time event is over already...");
359 iwl_mvm_te_clear_data(mvm, te_data);
360 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
361 te_data->running = true;
362 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
364 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
365 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
366 iwl_mvm_ref(mvm, IWL_MVM_REF_ROC);
367 ieee80211_ready_on_channel(mvm->hw);
368 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
369 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
372 IWL_WARN(mvm, "Got TE with unknown action\n");
377 * Handle A Aux ROC time event
379 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
380 struct iwl_time_event_notif *notif)
382 struct iwl_mvm_time_event_data *te_data, *tmp;
383 bool aux_roc_te = false;
385 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) {
386 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
391 if (!aux_roc_te) /* Not a Aux ROC time event */
394 iwl_mvm_te_check_trigger(mvm, notif, te_data);
397 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n",
398 le32_to_cpu(notif->unique_id),
399 le32_to_cpu(notif->action), le32_to_cpu(notif->status));
401 if (!le32_to_cpu(notif->status) ||
402 le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
403 /* End TE, notify mac80211 */
404 ieee80211_remain_on_channel_expired(mvm->hw);
405 iwl_mvm_roc_finished(mvm); /* flush aux queue */
406 list_del(&te_data->list); /* remove from list */
407 te_data->running = false;
410 te_data->id = TE_MAX;
411 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
412 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
413 te_data->running = true;
414 iwl_mvm_ref(mvm, IWL_MVM_REF_ROC_AUX);
415 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
418 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
419 le32_to_cpu(notif->action));
427 * The Rx handler for time event notifications
429 void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
430 struct iwl_rx_cmd_buffer *rxb)
432 struct iwl_rx_packet *pkt = rxb_addr(rxb);
433 struct iwl_time_event_notif *notif = (void *)pkt->data;
434 struct iwl_mvm_time_event_data *te_data, *tmp;
436 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
437 le32_to_cpu(notif->unique_id),
438 le32_to_cpu(notif->action));
440 spin_lock_bh(&mvm->time_event_lock);
441 /* This time event is triggered for Aux ROC request */
442 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
445 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
446 if (le32_to_cpu(notif->unique_id) == te_data->uid)
447 iwl_mvm_te_handle_notif(mvm, te_data, notif);
450 spin_unlock_bh(&mvm->time_event_lock);
453 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
454 struct iwl_rx_packet *pkt, void *data)
456 struct iwl_mvm *mvm =
457 container_of(notif_wait, struct iwl_mvm, notif_wait);
458 struct iwl_mvm_time_event_data *te_data = data;
459 struct iwl_time_event_notif *resp;
460 int resp_len = iwl_rx_packet_payload_len(pkt);
462 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
465 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
466 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
470 resp = (void *)pkt->data;
472 /* te_data->uid is already set in the TIME_EVENT_CMD response */
473 if (le32_to_cpu(resp->unique_id) != te_data->uid)
476 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
480 "TIME_EVENT_NOTIFICATION received but not executed\n");
485 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
486 struct iwl_rx_packet *pkt, void *data)
488 struct iwl_mvm *mvm =
489 container_of(notif_wait, struct iwl_mvm, notif_wait);
490 struct iwl_mvm_time_event_data *te_data = data;
491 struct iwl_time_event_resp *resp;
492 int resp_len = iwl_rx_packet_payload_len(pkt);
494 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
497 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
498 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
502 resp = (void *)pkt->data;
504 /* we should never get a response to another TIME_EVENT_CMD here */
505 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
508 te_data->uid = le32_to_cpu(resp->unique_id);
509 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
514 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
515 struct ieee80211_vif *vif,
516 struct iwl_mvm_time_event_data *te_data,
517 struct iwl_time_event_cmd *te_cmd)
519 static const u16 time_event_response[] = { TIME_EVENT_CMD };
520 struct iwl_notification_wait wait_time_event;
523 lockdep_assert_held(&mvm->mutex);
525 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
526 le32_to_cpu(te_cmd->duration));
528 spin_lock_bh(&mvm->time_event_lock);
529 if (WARN_ON(te_data->id != TE_MAX)) {
530 spin_unlock_bh(&mvm->time_event_lock);
534 te_data->duration = le32_to_cpu(te_cmd->duration);
535 te_data->id = le32_to_cpu(te_cmd->id);
536 list_add_tail(&te_data->list, &mvm->time_event_list);
537 spin_unlock_bh(&mvm->time_event_lock);
540 * Use a notification wait, which really just processes the
541 * command response and doesn't wait for anything, in order
542 * to be able to process the response and get the UID inside
543 * the RX path. Using CMD_WANT_SKB doesn't work because it
544 * stores the buffer and then wakes up this thread, by which
545 * time another notification (that the time event started)
546 * might already be processed unsuccessfully.
548 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
550 ARRAY_SIZE(time_event_response),
551 iwl_mvm_time_event_response, te_data);
553 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
554 sizeof(*te_cmd), te_cmd);
556 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
557 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
561 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
562 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
563 /* should never fail */
568 spin_lock_bh(&mvm->time_event_lock);
569 iwl_mvm_te_clear_data(mvm, te_data);
570 spin_unlock_bh(&mvm->time_event_lock);
575 void iwl_mvm_protect_session(struct iwl_mvm *mvm,
576 struct ieee80211_vif *vif,
577 u32 duration, u32 min_duration,
578 u32 max_delay, bool wait_for_notif)
580 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
581 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
582 const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
583 struct iwl_notification_wait wait_te_notif;
584 struct iwl_time_event_cmd time_cmd = {};
586 lockdep_assert_held(&mvm->mutex);
588 if (te_data->running &&
589 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
590 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
591 jiffies_to_msecs(te_data->end_jiffies - jiffies));
595 if (te_data->running) {
596 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
598 jiffies_to_msecs(te_data->end_jiffies - jiffies));
600 * we don't have enough time
601 * cancel the current TE and issue a new one
602 * Of course it would be better to remove the old one only
603 * when the new one is added, but we don't care if we are off
604 * channel for a bit. All we need to do, is not to return
605 * before we actually begin to be on the channel.
607 iwl_mvm_stop_session_protection(mvm, vif);
610 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
611 time_cmd.id_and_color =
612 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
613 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
615 time_cmd.apply_time = cpu_to_le32(0);
617 time_cmd.max_frags = TE_V2_FRAG_NONE;
618 time_cmd.max_delay = cpu_to_le32(max_delay);
619 /* TODO: why do we need to interval = bi if it is not periodic? */
620 time_cmd.interval = cpu_to_le32(1);
621 time_cmd.duration = cpu_to_le32(duration);
623 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
624 TE_V2_NOTIF_HOST_EVENT_END |
625 TE_V2_START_IMMEDIATELY);
627 if (!wait_for_notif) {
628 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
633 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
634 * right after we send the time event
636 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
638 ARRAY_SIZE(te_notif_response),
639 iwl_mvm_te_notif, te_data);
641 /* If TE was sent OK - wait for the notification that started */
642 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
643 IWL_ERR(mvm, "Failed to add TE to protect session\n");
644 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
645 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
646 TU_TO_JIFFIES(max_delay))) {
647 IWL_ERR(mvm, "Failed to protect session until TE\n");
651 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
652 struct iwl_mvm_time_event_data *te_data,
658 * It is possible that by the time we got to this point the time
659 * event was already removed.
661 spin_lock_bh(&mvm->time_event_lock);
663 /* Save time event uid before clearing its data */
668 * The clear_data function handles time events that were already removed
670 iwl_mvm_te_clear_data(mvm, te_data);
671 spin_unlock_bh(&mvm->time_event_lock);
674 * It is possible that by the time we try to remove it, the time event
675 * has already ended and removed. In such a case there is no need to
676 * send a removal command.
679 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
687 * Explicit request to remove a aux roc time event. The removal of a time
688 * event needs to be synchronized with the flow of a time event's end
689 * notification, which also removes the time event from the op mode
692 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
693 struct iwl_mvm_vif *mvmvif,
694 struct iwl_mvm_time_event_data *te_data)
696 struct iwl_hs20_roc_req aux_cmd = {};
700 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
703 aux_cmd.event_unique_id = cpu_to_le32(uid);
704 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
705 aux_cmd.id_and_color =
706 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
707 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
708 le32_to_cpu(aux_cmd.event_unique_id));
709 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
710 sizeof(aux_cmd), &aux_cmd);
717 * Explicit request to remove a time event. The removal of a time event needs to
718 * be synchronized with the flow of a time event's end notification, which also
719 * removes the time event from the op mode data structures.
721 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
722 struct iwl_mvm_vif *mvmvif,
723 struct iwl_mvm_time_event_data *te_data)
725 struct iwl_time_event_cmd time_cmd = {};
729 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
732 /* When we remove a TE, the UID is to be set in the id field */
733 time_cmd.id = cpu_to_le32(uid);
734 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
735 time_cmd.id_and_color =
736 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
738 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
739 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
740 sizeof(time_cmd), &time_cmd);
745 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
746 struct ieee80211_vif *vif)
748 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
749 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
752 lockdep_assert_held(&mvm->mutex);
754 spin_lock_bh(&mvm->time_event_lock);
756 spin_unlock_bh(&mvm->time_event_lock);
758 if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) {
760 "don't remove TE with id=%u (not session protection)\n",
765 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
768 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
769 int duration, enum ieee80211_roc_type type)
771 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
772 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
773 struct iwl_time_event_cmd time_cmd = {};
775 lockdep_assert_held(&mvm->mutex);
776 if (te_data->running) {
777 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
782 * Flush the done work, just in case it's still pending, so that
783 * the work it does can complete and we can accept new frames.
785 flush_work(&mvm->roc_done_wk);
787 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
788 time_cmd.id_and_color =
789 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
792 case IEEE80211_ROC_TYPE_NORMAL:
793 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
795 case IEEE80211_ROC_TYPE_MGMT_TX:
796 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
799 WARN_ONCE(1, "Got an invalid ROC type\n");
803 time_cmd.apply_time = cpu_to_le32(0);
804 time_cmd.interval = cpu_to_le32(1);
807 * The P2P Device TEs can have lower priority than other events
808 * that are being scheduled by the driver/fw, and thus it might not be
809 * scheduled. To improve the chances of it being scheduled, allow them
810 * to be fragmented, and in addition allow them to be delayed.
812 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
813 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
814 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
816 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
817 TE_V2_NOTIF_HOST_EVENT_END |
818 TE_V2_START_IMMEDIATELY);
820 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
823 static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm)
825 struct iwl_mvm_time_event_data *te_data;
827 lockdep_assert_held(&mvm->mutex);
829 spin_lock_bh(&mvm->time_event_lock);
832 * Iterate over the list of time events and find the time event that is
833 * associated with a P2P_DEVICE interface.
834 * This assumes that a P2P_DEVICE interface can have only a single time
835 * event at any given time and this time event coresponds to a ROC
838 list_for_each_entry(te_data, &mvm->time_event_list, list) {
839 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE)
843 /* There can only be at most one AUX ROC time event, we just use the
844 * list to simplify/unify code. Remove it if it exists.
846 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list,
847 struct iwl_mvm_time_event_data,
850 spin_unlock_bh(&mvm->time_event_lock);
854 void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm)
856 struct iwl_mvm_time_event_data *te_data;
859 te_data = iwl_mvm_get_roc_te(mvm);
861 __iwl_mvm_remove_time_event(mvm, te_data, &uid);
864 void iwl_mvm_stop_roc(struct iwl_mvm *mvm)
866 struct iwl_mvm_vif *mvmvif;
867 struct iwl_mvm_time_event_data *te_data;
869 te_data = iwl_mvm_get_roc_te(mvm);
871 IWL_WARN(mvm, "No remain on channel event\n");
875 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
877 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
878 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
879 set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status);
881 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
884 iwl_mvm_roc_finished(mvm);
887 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
888 struct ieee80211_vif *vif,
889 u32 duration, u32 apply_time)
891 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
892 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
893 struct iwl_time_event_cmd time_cmd = {};
895 lockdep_assert_held(&mvm->mutex);
897 if (te_data->running) {
900 spin_lock_bh(&mvm->time_event_lock);
902 spin_unlock_bh(&mvm->time_event_lock);
904 if (id == TE_CHANNEL_SWITCH_PERIOD) {
905 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
910 * Remove the session protection time event to allow the
911 * channel switch. If we got here, we just heard a beacon so
912 * the session protection is not needed anymore anyway.
914 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
917 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
918 time_cmd.id_and_color =
919 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
920 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
921 time_cmd.apply_time = cpu_to_le32(apply_time);
922 time_cmd.max_frags = TE_V2_FRAG_NONE;
923 time_cmd.duration = cpu_to_le32(duration);
925 time_cmd.interval = cpu_to_le32(1);
926 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
929 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY);
931 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);