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
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39 * modification, are permitted provided that the following conditions
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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 switch (te_data->vif->type) {
267 case NL80211_IFTYPE_P2P_DEVICE:
268 ieee80211_remain_on_channel_expired(mvm->hw);
269 iwl_mvm_roc_finished(mvm);
271 case NL80211_IFTYPE_STATION:
273 * By now, we should have finished association
274 * and know the dtim period.
276 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
277 "No association and the time event is over already...");
283 iwl_mvm_te_clear_data(mvm, te_data);
284 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
285 te_data->running = true;
286 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
288 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
289 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
290 iwl_mvm_ref(mvm, IWL_MVM_REF_ROC);
291 ieee80211_ready_on_channel(mvm->hw);
292 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
293 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
296 IWL_WARN(mvm, "Got TE with unknown action\n");
301 * Handle A Aux ROC time event
303 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
304 struct iwl_time_event_notif *notif)
306 struct iwl_mvm_time_event_data *te_data, *tmp;
307 bool aux_roc_te = false;
309 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) {
310 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
315 if (!aux_roc_te) /* Not a Aux ROC time event */
318 if (!le32_to_cpu(notif->status)) {
320 "ERROR: Aux ROC Time Event %s notification failure\n",
321 (le32_to_cpu(notif->action) &
322 TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end");
327 "Aux ROC time event notification - UID = 0x%x action %d\n",
328 le32_to_cpu(notif->unique_id),
329 le32_to_cpu(notif->action));
331 if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
332 /* End TE, notify mac80211 */
333 ieee80211_remain_on_channel_expired(mvm->hw);
334 iwl_mvm_roc_finished(mvm); /* flush aux queue */
335 list_del(&te_data->list); /* remove from list */
336 te_data->running = false;
339 te_data->id = TE_MAX;
340 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
341 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
342 te_data->running = true;
343 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
346 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
347 le32_to_cpu(notif->action));
355 * The Rx handler for time event notifications
357 int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
358 struct iwl_rx_cmd_buffer *rxb,
359 struct iwl_device_cmd *cmd)
361 struct iwl_rx_packet *pkt = rxb_addr(rxb);
362 struct iwl_time_event_notif *notif = (void *)pkt->data;
363 struct iwl_mvm_time_event_data *te_data, *tmp;
365 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
366 le32_to_cpu(notif->unique_id),
367 le32_to_cpu(notif->action));
369 spin_lock_bh(&mvm->time_event_lock);
370 /* This time event is triggered for Aux ROC request */
371 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
374 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
375 if (le32_to_cpu(notif->unique_id) == te_data->uid)
376 iwl_mvm_te_handle_notif(mvm, te_data, notif);
379 spin_unlock_bh(&mvm->time_event_lock);
384 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
385 struct iwl_rx_packet *pkt, void *data)
387 struct iwl_mvm *mvm =
388 container_of(notif_wait, struct iwl_mvm, notif_wait);
389 struct iwl_mvm_time_event_data *te_data = data;
390 struct iwl_time_event_notif *resp;
391 int resp_len = iwl_rx_packet_payload_len(pkt);
393 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
396 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
397 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
401 resp = (void *)pkt->data;
403 /* te_data->uid is already set in the TIME_EVENT_CMD response */
404 if (le32_to_cpu(resp->unique_id) != te_data->uid)
407 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
411 "TIME_EVENT_NOTIFICATION received but not executed\n");
416 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
417 struct iwl_rx_packet *pkt, void *data)
419 struct iwl_mvm *mvm =
420 container_of(notif_wait, struct iwl_mvm, notif_wait);
421 struct iwl_mvm_time_event_data *te_data = data;
422 struct iwl_time_event_resp *resp;
423 int resp_len = iwl_rx_packet_payload_len(pkt);
425 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
428 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
429 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
433 resp = (void *)pkt->data;
435 /* we should never get a response to another TIME_EVENT_CMD here */
436 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
439 te_data->uid = le32_to_cpu(resp->unique_id);
440 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
445 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
446 struct ieee80211_vif *vif,
447 struct iwl_mvm_time_event_data *te_data,
448 struct iwl_time_event_cmd *te_cmd)
450 static const u8 time_event_response[] = { TIME_EVENT_CMD };
451 struct iwl_notification_wait wait_time_event;
454 lockdep_assert_held(&mvm->mutex);
456 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
457 le32_to_cpu(te_cmd->duration));
459 spin_lock_bh(&mvm->time_event_lock);
460 if (WARN_ON(te_data->id != TE_MAX)) {
461 spin_unlock_bh(&mvm->time_event_lock);
465 te_data->duration = le32_to_cpu(te_cmd->duration);
466 te_data->id = le32_to_cpu(te_cmd->id);
467 list_add_tail(&te_data->list, &mvm->time_event_list);
468 spin_unlock_bh(&mvm->time_event_lock);
471 * Use a notification wait, which really just processes the
472 * command response and doesn't wait for anything, in order
473 * to be able to process the response and get the UID inside
474 * the RX path. Using CMD_WANT_SKB doesn't work because it
475 * stores the buffer and then wakes up this thread, by which
476 * time another notification (that the time event started)
477 * might already be processed unsuccessfully.
479 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
481 ARRAY_SIZE(time_event_response),
482 iwl_mvm_time_event_response, te_data);
484 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
485 sizeof(*te_cmd), te_cmd);
487 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
488 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
492 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
493 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
494 /* should never fail */
499 spin_lock_bh(&mvm->time_event_lock);
500 iwl_mvm_te_clear_data(mvm, te_data);
501 spin_unlock_bh(&mvm->time_event_lock);
506 void iwl_mvm_protect_session(struct iwl_mvm *mvm,
507 struct ieee80211_vif *vif,
508 u32 duration, u32 min_duration,
509 u32 max_delay, bool wait_for_notif)
511 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
512 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
513 const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
514 struct iwl_notification_wait wait_te_notif;
515 struct iwl_time_event_cmd time_cmd = {};
517 lockdep_assert_held(&mvm->mutex);
519 if (te_data->running &&
520 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
521 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
522 jiffies_to_msecs(te_data->end_jiffies - jiffies));
526 if (te_data->running) {
527 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
529 jiffies_to_msecs(te_data->end_jiffies - jiffies));
531 * we don't have enough time
532 * cancel the current TE and issue a new one
533 * Of course it would be better to remove the old one only
534 * when the new one is added, but we don't care if we are off
535 * channel for a bit. All we need to do, is not to return
536 * before we actually begin to be on the channel.
538 iwl_mvm_stop_session_protection(mvm, vif);
541 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
542 time_cmd.id_and_color =
543 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
544 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
546 time_cmd.apply_time =
547 cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG));
549 time_cmd.max_frags = TE_V2_FRAG_NONE;
550 time_cmd.max_delay = cpu_to_le32(max_delay);
551 /* TODO: why do we need to interval = bi if it is not periodic? */
552 time_cmd.interval = cpu_to_le32(1);
553 time_cmd.duration = cpu_to_le32(duration);
555 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
556 TE_V2_NOTIF_HOST_EVENT_END |
557 T2_V2_START_IMMEDIATELY);
559 if (!wait_for_notif) {
560 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
565 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
566 * right after we send the time event
568 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
570 ARRAY_SIZE(te_notif_response),
571 iwl_mvm_te_notif, te_data);
573 /* If TE was sent OK - wait for the notification that started */
574 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
575 IWL_ERR(mvm, "Failed to add TE to protect session\n");
576 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
577 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
578 TU_TO_JIFFIES(max_delay))) {
579 IWL_ERR(mvm, "Failed to protect session until TE\n");
583 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
584 struct iwl_mvm_time_event_data *te_data,
590 * It is possible that by the time we got to this point the time
591 * event was already removed.
593 spin_lock_bh(&mvm->time_event_lock);
595 /* Save time event uid before clearing its data */
600 * The clear_data function handles time events that were already removed
602 iwl_mvm_te_clear_data(mvm, te_data);
603 spin_unlock_bh(&mvm->time_event_lock);
606 * It is possible that by the time we try to remove it, the time event
607 * has already ended and removed. In such a case there is no need to
608 * send a removal command.
611 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
619 * Explicit request to remove a aux roc time event. The removal of a time
620 * event needs to be synchronized with the flow of a time event's end
621 * notification, which also removes the time event from the op mode
624 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
625 struct iwl_mvm_vif *mvmvif,
626 struct iwl_mvm_time_event_data *te_data)
628 struct iwl_hs20_roc_req aux_cmd = {};
632 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
635 aux_cmd.event_unique_id = cpu_to_le32(uid);
636 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
637 aux_cmd.id_and_color =
638 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
639 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
640 le32_to_cpu(aux_cmd.event_unique_id));
641 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
642 sizeof(aux_cmd), &aux_cmd);
649 * Explicit request to remove a time event. The removal of a time event needs to
650 * be synchronized with the flow of a time event's end notification, which also
651 * removes the time event from the op mode data structures.
653 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
654 struct iwl_mvm_vif *mvmvif,
655 struct iwl_mvm_time_event_data *te_data)
657 struct iwl_time_event_cmd time_cmd = {};
661 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
664 /* When we remove a TE, the UID is to be set in the id field */
665 time_cmd.id = cpu_to_le32(uid);
666 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
667 time_cmd.id_and_color =
668 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
670 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
671 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
672 sizeof(time_cmd), &time_cmd);
677 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
678 struct ieee80211_vif *vif)
680 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
681 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
683 lockdep_assert_held(&mvm->mutex);
684 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
687 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
688 int duration, enum ieee80211_roc_type type)
690 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
691 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
692 struct iwl_time_event_cmd time_cmd = {};
694 lockdep_assert_held(&mvm->mutex);
695 if (te_data->running) {
696 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
701 * Flush the done work, just in case it's still pending, so that
702 * the work it does can complete and we can accept new frames.
704 flush_work(&mvm->roc_done_wk);
706 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
707 time_cmd.id_and_color =
708 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
711 case IEEE80211_ROC_TYPE_NORMAL:
712 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
714 case IEEE80211_ROC_TYPE_MGMT_TX:
715 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
718 WARN_ONCE(1, "Got an invalid ROC type\n");
722 time_cmd.apply_time = cpu_to_le32(0);
723 time_cmd.interval = cpu_to_le32(1);
726 * The P2P Device TEs can have lower priority than other events
727 * that are being scheduled by the driver/fw, and thus it might not be
728 * scheduled. To improve the chances of it being scheduled, allow them
729 * to be fragmented, and in addition allow them to be delayed.
731 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
732 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
733 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
735 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
736 TE_V2_NOTIF_HOST_EVENT_END |
737 T2_V2_START_IMMEDIATELY);
739 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
742 void iwl_mvm_stop_roc(struct iwl_mvm *mvm)
744 struct iwl_mvm_vif *mvmvif;
745 struct iwl_mvm_time_event_data *te_data;
748 lockdep_assert_held(&mvm->mutex);
751 spin_lock_bh(&mvm->time_event_lock);
754 * Iterate over the list of time events and find the time event that is
755 * associated with a P2P_DEVICE interface.
756 * This assumes that a P2P_DEVICE interface can have only a single time
757 * event at any given time and this time event coresponds to a ROC
760 list_for_each_entry(te_data, &mvm->time_event_list, list) {
761 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
762 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
769 * Iterate over the list of aux roc time events and find the time
770 * event that is associated with a BSS interface.
771 * This assumes that a BSS interface can have only a single time
772 * event at any given time and this time event coresponds to a ROC
775 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) {
776 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
781 spin_unlock_bh(&mvm->time_event_lock);
784 IWL_WARN(mvm, "No remain on channel event\n");
789 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
791 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
793 iwl_mvm_roc_finished(mvm);
796 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
797 struct ieee80211_vif *vif,
798 u32 duration, u32 apply_time)
800 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
801 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
802 struct iwl_time_event_cmd time_cmd = {};
804 lockdep_assert_held(&mvm->mutex);
806 if (te_data->running) {
807 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
811 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
812 time_cmd.id_and_color =
813 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
814 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
815 time_cmd.apply_time = cpu_to_le32(apply_time);
816 time_cmd.max_frags = TE_V2_FRAG_NONE;
817 time_cmd.duration = cpu_to_le32(duration);
819 time_cmd.interval = cpu_to_le32(1);
820 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
823 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);