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.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n");
201 iwl_mvm_te_clear_data(mvm, te_data);
205 switch (te_data->vif->type) {
206 case NL80211_IFTYPE_AP:
207 iwl_mvm_csa_noa_start(mvm);
209 case NL80211_IFTYPE_STATION:
210 iwl_mvm_csa_client_absent(mvm, te_data->vif);
211 ieee80211_chswitch_done(te_data->vif, true);
214 /* should never happen */
219 /* we don't need it anymore */
220 iwl_mvm_te_clear_data(mvm, te_data);
224 * Handles a FW notification for an event that is known to the driver.
226 * @mvm: the mvm component
227 * @te_data: the time event data
228 * @notif: the notification data corresponding the time event data.
230 static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm,
231 struct iwl_mvm_time_event_data *te_data,
232 struct iwl_time_event_notif *notif)
234 lockdep_assert_held(&mvm->time_event_lock);
236 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n",
237 le32_to_cpu(notif->unique_id),
238 le32_to_cpu(notif->action));
241 * The FW sends the start/end time event notifications even for events
242 * that it fails to schedule. This is indicated in the status field of
243 * the notification. This happens in cases that the scheduler cannot
244 * find a schedule that can handle the event (for example requesting a
245 * P2P Device discoveribility, while there are other higher priority
246 * events in the system).
248 if (!le32_to_cpu(notif->status)) {
249 bool start = le32_to_cpu(notif->action) &
250 TE_V2_NOTIF_HOST_EVENT_START;
251 IWL_WARN(mvm, "Time Event %s notification failure\n",
252 start ? "start" : "end");
253 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) {
254 iwl_mvm_te_clear_data(mvm, te_data);
259 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) {
261 "TE ended - current time %lu, estimated end %lu\n",
262 jiffies, te_data->end_jiffies);
264 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
265 ieee80211_remain_on_channel_expired(mvm->hw);
266 iwl_mvm_roc_finished(mvm);
270 * By now, we should have finished association
271 * and know the dtim period.
273 iwl_mvm_te_check_disconnect(mvm, te_data->vif,
274 "No association and the time event is over already...");
275 iwl_mvm_te_clear_data(mvm, te_data);
276 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) {
277 te_data->running = true;
278 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration);
280 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) {
281 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status);
282 iwl_mvm_ref(mvm, IWL_MVM_REF_ROC);
283 ieee80211_ready_on_channel(mvm->hw);
284 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) {
285 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif);
288 IWL_WARN(mvm, "Got TE with unknown action\n");
293 * Handle A Aux ROC time event
295 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm,
296 struct iwl_time_event_notif *notif)
298 struct iwl_mvm_time_event_data *te_data, *tmp;
299 bool aux_roc_te = false;
301 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) {
302 if (le32_to_cpu(notif->unique_id) == te_data->uid) {
307 if (!aux_roc_te) /* Not a Aux ROC time event */
310 if (!le32_to_cpu(notif->status)) {
312 "ERROR: Aux ROC Time Event %s notification failure\n",
313 (le32_to_cpu(notif->action) &
314 TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end");
319 "Aux ROC time event notification - UID = 0x%x action %d\n",
320 le32_to_cpu(notif->unique_id),
321 le32_to_cpu(notif->action));
323 if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) {
324 /* End TE, notify mac80211 */
325 ieee80211_remain_on_channel_expired(mvm->hw);
326 iwl_mvm_roc_finished(mvm); /* flush aux queue */
327 list_del(&te_data->list); /* remove from list */
328 te_data->running = false;
331 te_data->id = TE_MAX;
332 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) {
333 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status);
334 te_data->running = true;
335 ieee80211_ready_on_channel(mvm->hw); /* Start TE */
338 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
339 le32_to_cpu(notif->action));
347 * The Rx handler for time event notifications
349 int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
350 struct iwl_rx_cmd_buffer *rxb,
351 struct iwl_device_cmd *cmd)
353 struct iwl_rx_packet *pkt = rxb_addr(rxb);
354 struct iwl_time_event_notif *notif = (void *)pkt->data;
355 struct iwl_mvm_time_event_data *te_data, *tmp;
357 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n",
358 le32_to_cpu(notif->unique_id),
359 le32_to_cpu(notif->action));
361 spin_lock_bh(&mvm->time_event_lock);
362 /* This time event is triggered for Aux ROC request */
363 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif))
366 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) {
367 if (le32_to_cpu(notif->unique_id) == te_data->uid)
368 iwl_mvm_te_handle_notif(mvm, te_data, notif);
371 spin_unlock_bh(&mvm->time_event_lock);
376 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait,
377 struct iwl_rx_packet *pkt, void *data)
379 struct iwl_mvm *mvm =
380 container_of(notif_wait, struct iwl_mvm, notif_wait);
381 struct iwl_mvm_time_event_data *te_data = data;
382 struct iwl_time_event_notif *resp;
383 int resp_len = iwl_rx_packet_payload_len(pkt);
385 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION))
388 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
389 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n");
393 resp = (void *)pkt->data;
395 /* te_data->uid is already set in the TIME_EVENT_CMD response */
396 if (le32_to_cpu(resp->unique_id) != te_data->uid)
399 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
403 "TIME_EVENT_NOTIFICATION received but not executed\n");
408 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait,
409 struct iwl_rx_packet *pkt, void *data)
411 struct iwl_mvm *mvm =
412 container_of(notif_wait, struct iwl_mvm, notif_wait);
413 struct iwl_mvm_time_event_data *te_data = data;
414 struct iwl_time_event_resp *resp;
415 int resp_len = iwl_rx_packet_payload_len(pkt);
417 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD))
420 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
421 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n");
425 resp = (void *)pkt->data;
427 /* we should never get a response to another TIME_EVENT_CMD here */
428 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id))
431 te_data->uid = le32_to_cpu(resp->unique_id);
432 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
437 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm,
438 struct ieee80211_vif *vif,
439 struct iwl_mvm_time_event_data *te_data,
440 struct iwl_time_event_cmd *te_cmd)
442 static const u8 time_event_response[] = { TIME_EVENT_CMD };
443 struct iwl_notification_wait wait_time_event;
446 lockdep_assert_held(&mvm->mutex);
448 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n",
449 le32_to_cpu(te_cmd->duration));
451 spin_lock_bh(&mvm->time_event_lock);
452 if (WARN_ON(te_data->id != TE_MAX)) {
453 spin_unlock_bh(&mvm->time_event_lock);
457 te_data->duration = le32_to_cpu(te_cmd->duration);
458 te_data->id = le32_to_cpu(te_cmd->id);
459 list_add_tail(&te_data->list, &mvm->time_event_list);
460 spin_unlock_bh(&mvm->time_event_lock);
463 * Use a notification wait, which really just processes the
464 * command response and doesn't wait for anything, in order
465 * to be able to process the response and get the UID inside
466 * the RX path. Using CMD_WANT_SKB doesn't work because it
467 * stores the buffer and then wakes up this thread, by which
468 * time another notification (that the time event started)
469 * might already be processed unsuccessfully.
471 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
473 ARRAY_SIZE(time_event_response),
474 iwl_mvm_time_event_response, te_data);
476 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
477 sizeof(*te_cmd), te_cmd);
479 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret);
480 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
484 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
485 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
486 /* should never fail */
491 spin_lock_bh(&mvm->time_event_lock);
492 iwl_mvm_te_clear_data(mvm, te_data);
493 spin_unlock_bh(&mvm->time_event_lock);
498 void iwl_mvm_protect_session(struct iwl_mvm *mvm,
499 struct ieee80211_vif *vif,
500 u32 duration, u32 min_duration,
501 u32 max_delay, bool wait_for_notif)
503 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
504 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
505 const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION };
506 struct iwl_notification_wait wait_te_notif;
507 struct iwl_time_event_cmd time_cmd = {};
509 lockdep_assert_held(&mvm->mutex);
511 if (te_data->running &&
512 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) {
513 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n",
514 jiffies_to_msecs(te_data->end_jiffies - jiffies));
518 if (te_data->running) {
519 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n",
521 jiffies_to_msecs(te_data->end_jiffies - jiffies));
523 * we don't have enough time
524 * cancel the current TE and issue a new one
525 * Of course it would be better to remove the old one only
526 * when the new one is added, but we don't care if we are off
527 * channel for a bit. All we need to do, is not to return
528 * before we actually begin to be on the channel.
530 iwl_mvm_stop_session_protection(mvm, vif);
533 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
534 time_cmd.id_and_color =
535 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
536 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC);
538 time_cmd.apply_time =
539 cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG));
541 time_cmd.max_frags = TE_V2_FRAG_NONE;
542 time_cmd.max_delay = cpu_to_le32(max_delay);
543 /* TODO: why do we need to interval = bi if it is not periodic? */
544 time_cmd.interval = cpu_to_le32(1);
545 time_cmd.duration = cpu_to_le32(duration);
547 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
548 TE_V2_NOTIF_HOST_EVENT_END |
549 T2_V2_START_IMMEDIATELY);
551 if (!wait_for_notif) {
552 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
557 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
558 * right after we send the time event
560 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif,
562 ARRAY_SIZE(te_notif_response),
563 iwl_mvm_te_notif, te_data);
565 /* If TE was sent OK - wait for the notification that started */
566 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) {
567 IWL_ERR(mvm, "Failed to add TE to protect session\n");
568 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif);
569 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif,
570 TU_TO_JIFFIES(max_delay))) {
571 IWL_ERR(mvm, "Failed to protect session until TE\n");
575 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
576 struct iwl_mvm_time_event_data *te_data,
582 * It is possible that by the time we got to this point the time
583 * event was already removed.
585 spin_lock_bh(&mvm->time_event_lock);
587 /* Save time event uid before clearing its data */
592 * The clear_data function handles time events that were already removed
594 iwl_mvm_te_clear_data(mvm, te_data);
595 spin_unlock_bh(&mvm->time_event_lock);
598 * It is possible that by the time we try to remove it, the time event
599 * has already ended and removed. In such a case there is no need to
600 * send a removal command.
603 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid);
611 * Explicit request to remove a aux roc time event. The removal of a time
612 * event needs to be synchronized with the flow of a time event's end
613 * notification, which also removes the time event from the op mode
616 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm,
617 struct iwl_mvm_vif *mvmvif,
618 struct iwl_mvm_time_event_data *te_data)
620 struct iwl_hs20_roc_req aux_cmd = {};
624 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
627 aux_cmd.event_unique_id = cpu_to_le32(uid);
628 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
629 aux_cmd.id_and_color =
630 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
631 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n",
632 le32_to_cpu(aux_cmd.event_unique_id));
633 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0,
634 sizeof(aux_cmd), &aux_cmd);
641 * Explicit request to remove a time event. The removal of a time event needs to
642 * be synchronized with the flow of a time event's end notification, which also
643 * removes the time event from the op mode data structures.
645 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
646 struct iwl_mvm_vif *mvmvif,
647 struct iwl_mvm_time_event_data *te_data)
649 struct iwl_time_event_cmd time_cmd = {};
653 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid))
656 /* When we remove a TE, the UID is to be set in the id field */
657 time_cmd.id = cpu_to_le32(uid);
658 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
659 time_cmd.id_and_color =
660 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
662 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id));
663 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0,
664 sizeof(time_cmd), &time_cmd);
669 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
670 struct ieee80211_vif *vif)
672 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
673 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
675 lockdep_assert_held(&mvm->mutex);
676 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
679 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
680 int duration, enum ieee80211_roc_type type)
682 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
683 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
684 struct iwl_time_event_cmd time_cmd = {};
686 lockdep_assert_held(&mvm->mutex);
687 if (te_data->running) {
688 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n");
693 * Flush the done work, just in case it's still pending, so that
694 * the work it does can complete and we can accept new frames.
696 flush_work(&mvm->roc_done_wk);
698 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
699 time_cmd.id_and_color =
700 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
703 case IEEE80211_ROC_TYPE_NORMAL:
704 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL);
706 case IEEE80211_ROC_TYPE_MGMT_TX:
707 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX);
710 WARN_ONCE(1, "Got an invalid ROC type\n");
714 time_cmd.apply_time = cpu_to_le32(0);
715 time_cmd.interval = cpu_to_le32(1);
718 * The P2P Device TEs can have lower priority than other events
719 * that are being scheduled by the driver/fw, and thus it might not be
720 * scheduled. To improve the chances of it being scheduled, allow them
721 * to be fragmented, and in addition allow them to be delayed.
723 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS);
724 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2));
725 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
727 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
728 TE_V2_NOTIF_HOST_EVENT_END |
729 T2_V2_START_IMMEDIATELY);
731 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
734 void iwl_mvm_stop_roc(struct iwl_mvm *mvm)
736 struct iwl_mvm_vif *mvmvif;
737 struct iwl_mvm_time_event_data *te_data;
740 lockdep_assert_held(&mvm->mutex);
743 spin_lock_bh(&mvm->time_event_lock);
746 * Iterate over the list of time events and find the time event that is
747 * associated with a P2P_DEVICE interface.
748 * This assumes that a P2P_DEVICE interface can have only a single time
749 * event at any given time and this time event coresponds to a ROC
752 list_for_each_entry(te_data, &mvm->time_event_list, list) {
753 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE &&
755 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
762 * Iterate over the list of aux roc time events and find the time
763 * event that is associated with a BSS interface.
764 * This assumes that a BSS interface can have only a single time
765 * event at any given time and this time event coresponds to a ROC
768 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) {
769 if (te_data->running) {
770 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif);
776 spin_unlock_bh(&mvm->time_event_lock);
779 IWL_WARN(mvm, "No remain on channel event\n");
784 iwl_mvm_remove_time_event(mvm, mvmvif, te_data);
786 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data);
788 iwl_mvm_roc_finished(mvm);
791 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
792 struct ieee80211_vif *vif,
793 u32 duration, u32 apply_time)
795 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
796 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
797 struct iwl_time_event_cmd time_cmd = {};
799 lockdep_assert_held(&mvm->mutex);
801 if (te_data->running) {
802 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n");
806 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
807 time_cmd.id_and_color =
808 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
809 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD);
810 time_cmd.apply_time = cpu_to_le32(apply_time);
811 time_cmd.max_frags = TE_V2_FRAG_NONE;
812 time_cmd.duration = cpu_to_le32(duration);
814 time_cmd.interval = cpu_to_le32(1);
815 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START |
818 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);