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
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 - 2015 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"
79 * For the high priority TE use a time event type that has similar priority to
80 * the FW's action scan priority.
82 #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE
83 #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC
85 void iwl_mvm_te_clear_data(struct iwl_mvm
*mvm
,
86 struct iwl_mvm_time_event_data
*te_data
)
88 lockdep_assert_held(&mvm
->time_event_lock
);
93 list_del(&te_data
->list
);
94 te_data
->running
= false;
100 void iwl_mvm_roc_done_wk(struct work_struct
*wk
)
102 struct iwl_mvm
*mvm
= container_of(wk
, struct iwl_mvm
, roc_done_wk
);
106 * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit.
107 * This will cause the TX path to drop offchannel transmissions.
108 * That would also be done by mac80211, but it is racy, in particular
109 * in the case that the time event actually completed in the firmware
110 * (which is handled in iwl_mvm_te_handle_notif).
112 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING
, &mvm
->status
)) {
113 queues
|= BIT(IWL_MVM_OFFCHANNEL_QUEUE
);
114 iwl_mvm_unref(mvm
, IWL_MVM_REF_ROC
);
116 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING
, &mvm
->status
)) {
117 queues
|= BIT(mvm
->aux_queue
);
118 iwl_mvm_unref(mvm
, IWL_MVM_REF_ROC_AUX
);
124 * Flush the offchannel queue -- this is called when the time
125 * event finishes or is canceled, so that frames queued for it
126 * won't get stuck on the queue and be transmitted in the next
128 * We have to send the command asynchronously since this cannot
129 * be under the mutex for locking reasons, but that's not an
130 * issue as it will have to complete before the next command is
131 * executed, and a new time event means a new command.
133 iwl_mvm_flush_tx_path(mvm
, queues
, CMD_ASYNC
);
136 static void iwl_mvm_roc_finished(struct iwl_mvm
*mvm
)
139 * Of course, our status bit is just as racy as mac80211, so in
140 * addition, fire off the work struct which will drop all frames
141 * from the hardware queues that made it through the race. First
142 * it will of course synchronize the TX path to make sure that
143 * any *new* TX will be rejected.
145 schedule_work(&mvm
->roc_done_wk
);
148 static void iwl_mvm_csa_noa_start(struct iwl_mvm
*mvm
)
150 struct ieee80211_vif
*csa_vif
;
154 csa_vif
= rcu_dereference(mvm
->csa_vif
);
155 if (!csa_vif
|| !csa_vif
->csa_active
)
158 IWL_DEBUG_TE(mvm
, "CSA NOA started\n");
161 * CSA NoA is started but we still have beacons to
162 * transmit on the current channel.
163 * So we just do nothing here and the switch
164 * will be performed on the last TBTT.
166 if (!ieee80211_csa_is_complete(csa_vif
)) {
167 IWL_WARN(mvm
, "CSA NOA started too early\n");
171 ieee80211_csa_finish(csa_vif
);
175 RCU_INIT_POINTER(mvm
->csa_vif
, NULL
);
183 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm
*mvm
,
184 struct ieee80211_vif
*vif
,
187 if (vif
->type
!= NL80211_IFTYPE_STATION
)
189 if (vif
->bss_conf
.assoc
&& vif
->bss_conf
.dtim_period
)
192 IWL_ERR(mvm
, "%s\n", errmsg
);
194 iwl_mvm_connection_loss(mvm
, vif
, errmsg
);
199 iwl_mvm_te_handle_notify_csa(struct iwl_mvm
*mvm
,
200 struct iwl_mvm_time_event_data
*te_data
,
201 struct iwl_time_event_notif
*notif
)
203 struct ieee80211_vif
*vif
= te_data
->vif
;
204 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
207 IWL_DEBUG_TE(mvm
, "CSA time event failed to start\n");
209 switch (te_data
->vif
->type
) {
210 case NL80211_IFTYPE_AP
:
212 mvmvif
->csa_failed
= true;
213 iwl_mvm_csa_noa_start(mvm
);
215 case NL80211_IFTYPE_STATION
:
216 if (!notif
->status
) {
217 iwl_mvm_connection_loss(mvm
, vif
,
218 "CSA TE failed to start");
221 iwl_mvm_csa_client_absent(mvm
, te_data
->vif
);
222 ieee80211_chswitch_done(te_data
->vif
, true);
225 /* should never happen */
230 /* we don't need it anymore */
231 iwl_mvm_te_clear_data(mvm
, te_data
);
234 static void iwl_mvm_te_check_trigger(struct iwl_mvm
*mvm
,
235 struct iwl_time_event_notif
*notif
,
236 struct iwl_mvm_time_event_data
*te_data
)
238 struct iwl_fw_dbg_trigger_tlv
*trig
;
239 struct iwl_fw_dbg_trigger_time_event
*te_trig
;
242 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TIME_EVENT
))
245 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TIME_EVENT
);
246 te_trig
= (void *)trig
->data
;
248 if (!iwl_fw_dbg_trigger_check_stop(mvm
, te_data
->vif
, trig
))
251 for (i
= 0; i
< ARRAY_SIZE(te_trig
->time_events
); i
++) {
252 u32 trig_te_id
= le32_to_cpu(te_trig
->time_events
[i
].id
);
253 u32 trig_action_bitmap
=
254 le32_to_cpu(te_trig
->time_events
[i
].action_bitmap
);
255 u32 trig_status_bitmap
=
256 le32_to_cpu(te_trig
->time_events
[i
].status_bitmap
);
258 if (trig_te_id
!= te_data
->id
||
259 !(trig_action_bitmap
& le32_to_cpu(notif
->action
)) ||
260 !(trig_status_bitmap
& BIT(le32_to_cpu(notif
->status
))))
263 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
264 "Time event %d Action 0x%x received status: %d",
266 le32_to_cpu(notif
->action
),
267 le32_to_cpu(notif
->status
));
273 * Handles a FW notification for an event that is known to the driver.
275 * @mvm: the mvm component
276 * @te_data: the time event data
277 * @notif: the notification data corresponding the time event data.
279 static void iwl_mvm_te_handle_notif(struct iwl_mvm
*mvm
,
280 struct iwl_mvm_time_event_data
*te_data
,
281 struct iwl_time_event_notif
*notif
)
283 lockdep_assert_held(&mvm
->time_event_lock
);
285 IWL_DEBUG_TE(mvm
, "Handle time event notif - UID = 0x%x action %d\n",
286 le32_to_cpu(notif
->unique_id
),
287 le32_to_cpu(notif
->action
));
289 iwl_mvm_te_check_trigger(mvm
, notif
, te_data
);
292 * The FW sends the start/end time event notifications even for events
293 * that it fails to schedule. This is indicated in the status field of
294 * the notification. This happens in cases that the scheduler cannot
295 * find a schedule that can handle the event (for example requesting a
296 * P2P Device discoveribility, while there are other higher priority
297 * events in the system).
299 if (!le32_to_cpu(notif
->status
)) {
302 if (notif
->action
& cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START
))
303 msg
= "Time Event start notification failure";
305 msg
= "Time Event end notification failure";
307 IWL_DEBUG_TE(mvm
, "%s\n", msg
);
309 if (iwl_mvm_te_check_disconnect(mvm
, te_data
->vif
, msg
)) {
310 iwl_mvm_te_clear_data(mvm
, te_data
);
315 if (le32_to_cpu(notif
->action
) & TE_V2_NOTIF_HOST_EVENT_END
) {
317 "TE ended - current time %lu, estimated end %lu\n",
318 jiffies
, te_data
->end_jiffies
);
320 switch (te_data
->vif
->type
) {
321 case NL80211_IFTYPE_P2P_DEVICE
:
322 ieee80211_remain_on_channel_expired(mvm
->hw
);
323 iwl_mvm_roc_finished(mvm
);
325 case NL80211_IFTYPE_STATION
:
327 * By now, we should have finished association
328 * and know the dtim period.
330 iwl_mvm_te_check_disconnect(mvm
, te_data
->vif
,
331 "No association and the time event is over already...");
337 iwl_mvm_te_clear_data(mvm
, te_data
);
338 } else if (le32_to_cpu(notif
->action
) & TE_V2_NOTIF_HOST_EVENT_START
) {
339 te_data
->running
= true;
340 te_data
->end_jiffies
= TU_TO_EXP_TIME(te_data
->duration
);
342 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
343 set_bit(IWL_MVM_STATUS_ROC_RUNNING
, &mvm
->status
);
344 iwl_mvm_ref(mvm
, IWL_MVM_REF_ROC
);
345 ieee80211_ready_on_channel(mvm
->hw
);
346 } else if (te_data
->id
== TE_CHANNEL_SWITCH_PERIOD
) {
347 iwl_mvm_te_handle_notify_csa(mvm
, te_data
, notif
);
350 IWL_WARN(mvm
, "Got TE with unknown action\n");
355 * Handle A Aux ROC time event
357 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm
*mvm
,
358 struct iwl_time_event_notif
*notif
)
360 struct iwl_mvm_time_event_data
*te_data
, *tmp
;
361 bool aux_roc_te
= false;
363 list_for_each_entry_safe(te_data
, tmp
, &mvm
->aux_roc_te_list
, list
) {
364 if (le32_to_cpu(notif
->unique_id
) == te_data
->uid
) {
369 if (!aux_roc_te
) /* Not a Aux ROC time event */
372 iwl_mvm_te_check_trigger(mvm
, notif
, te_data
);
374 if (!le32_to_cpu(notif
->status
)) {
376 "ERROR: Aux ROC Time Event %s notification failure\n",
377 (le32_to_cpu(notif
->action
) &
378 TE_V2_NOTIF_HOST_EVENT_START
) ? "start" : "end");
383 "Aux ROC time event notification - UID = 0x%x action %d\n",
384 le32_to_cpu(notif
->unique_id
),
385 le32_to_cpu(notif
->action
));
387 if (le32_to_cpu(notif
->action
) == TE_V2_NOTIF_HOST_EVENT_END
) {
388 /* End TE, notify mac80211 */
389 ieee80211_remain_on_channel_expired(mvm
->hw
);
390 iwl_mvm_roc_finished(mvm
); /* flush aux queue */
391 list_del(&te_data
->list
); /* remove from list */
392 te_data
->running
= false;
395 te_data
->id
= TE_MAX
;
396 } else if (le32_to_cpu(notif
->action
) == TE_V2_NOTIF_HOST_EVENT_START
) {
397 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING
, &mvm
->status
);
398 te_data
->running
= true;
399 iwl_mvm_ref(mvm
, IWL_MVM_REF_ROC_AUX
);
400 ieee80211_ready_on_channel(mvm
->hw
); /* Start TE */
403 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
404 le32_to_cpu(notif
->action
));
412 * The Rx handler for time event notifications
414 void iwl_mvm_rx_time_event_notif(struct iwl_mvm
*mvm
,
415 struct iwl_rx_cmd_buffer
*rxb
)
417 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
418 struct iwl_time_event_notif
*notif
= (void *)pkt
->data
;
419 struct iwl_mvm_time_event_data
*te_data
, *tmp
;
421 IWL_DEBUG_TE(mvm
, "Time event notification - UID = 0x%x action %d\n",
422 le32_to_cpu(notif
->unique_id
),
423 le32_to_cpu(notif
->action
));
425 spin_lock_bh(&mvm
->time_event_lock
);
426 /* This time event is triggered for Aux ROC request */
427 if (!iwl_mvm_aux_roc_te_handle_notif(mvm
, notif
))
430 list_for_each_entry_safe(te_data
, tmp
, &mvm
->time_event_list
, list
) {
431 if (le32_to_cpu(notif
->unique_id
) == te_data
->uid
)
432 iwl_mvm_te_handle_notif(mvm
, te_data
, notif
);
435 spin_unlock_bh(&mvm
->time_event_lock
);
438 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data
*notif_wait
,
439 struct iwl_rx_packet
*pkt
, void *data
)
441 struct iwl_mvm
*mvm
=
442 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
443 struct iwl_mvm_time_event_data
*te_data
= data
;
444 struct iwl_time_event_notif
*resp
;
445 int resp_len
= iwl_rx_packet_payload_len(pkt
);
447 if (WARN_ON(pkt
->hdr
.cmd
!= TIME_EVENT_NOTIFICATION
))
450 if (WARN_ON_ONCE(resp_len
!= sizeof(*resp
))) {
451 IWL_ERR(mvm
, "Invalid TIME_EVENT_NOTIFICATION response\n");
455 resp
= (void *)pkt
->data
;
457 /* te_data->uid is already set in the TIME_EVENT_CMD response */
458 if (le32_to_cpu(resp
->unique_id
) != te_data
->uid
)
461 IWL_DEBUG_TE(mvm
, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
465 "TIME_EVENT_NOTIFICATION received but not executed\n");
470 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data
*notif_wait
,
471 struct iwl_rx_packet
*pkt
, void *data
)
473 struct iwl_mvm
*mvm
=
474 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
475 struct iwl_mvm_time_event_data
*te_data
= data
;
476 struct iwl_time_event_resp
*resp
;
477 int resp_len
= iwl_rx_packet_payload_len(pkt
);
479 if (WARN_ON(pkt
->hdr
.cmd
!= TIME_EVENT_CMD
))
482 if (WARN_ON_ONCE(resp_len
!= sizeof(*resp
))) {
483 IWL_ERR(mvm
, "Invalid TIME_EVENT_CMD response\n");
487 resp
= (void *)pkt
->data
;
489 /* we should never get a response to another TIME_EVENT_CMD here */
490 if (WARN_ON_ONCE(le32_to_cpu(resp
->id
) != te_data
->id
))
493 te_data
->uid
= le32_to_cpu(resp
->unique_id
);
494 IWL_DEBUG_TE(mvm
, "TIME_EVENT_CMD response - UID = 0x%x\n",
499 static int iwl_mvm_time_event_send_add(struct iwl_mvm
*mvm
,
500 struct ieee80211_vif
*vif
,
501 struct iwl_mvm_time_event_data
*te_data
,
502 struct iwl_time_event_cmd
*te_cmd
)
504 static const u16 time_event_response
[] = { TIME_EVENT_CMD
};
505 struct iwl_notification_wait wait_time_event
;
508 lockdep_assert_held(&mvm
->mutex
);
510 IWL_DEBUG_TE(mvm
, "Add new TE, duration %d TU\n",
511 le32_to_cpu(te_cmd
->duration
));
513 spin_lock_bh(&mvm
->time_event_lock
);
514 if (WARN_ON(te_data
->id
!= TE_MAX
)) {
515 spin_unlock_bh(&mvm
->time_event_lock
);
519 te_data
->duration
= le32_to_cpu(te_cmd
->duration
);
520 te_data
->id
= le32_to_cpu(te_cmd
->id
);
521 list_add_tail(&te_data
->list
, &mvm
->time_event_list
);
522 spin_unlock_bh(&mvm
->time_event_lock
);
525 * Use a notification wait, which really just processes the
526 * command response and doesn't wait for anything, in order
527 * to be able to process the response and get the UID inside
528 * the RX path. Using CMD_WANT_SKB doesn't work because it
529 * stores the buffer and then wakes up this thread, by which
530 * time another notification (that the time event started)
531 * might already be processed unsuccessfully.
533 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_time_event
,
535 ARRAY_SIZE(time_event_response
),
536 iwl_mvm_time_event_response
, te_data
);
538 ret
= iwl_mvm_send_cmd_pdu(mvm
, TIME_EVENT_CMD
, 0,
539 sizeof(*te_cmd
), te_cmd
);
541 IWL_ERR(mvm
, "Couldn't send TIME_EVENT_CMD: %d\n", ret
);
542 iwl_remove_notification(&mvm
->notif_wait
, &wait_time_event
);
546 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
547 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_time_event
, 1);
548 /* should never fail */
553 spin_lock_bh(&mvm
->time_event_lock
);
554 iwl_mvm_te_clear_data(mvm
, te_data
);
555 spin_unlock_bh(&mvm
->time_event_lock
);
560 void iwl_mvm_protect_session(struct iwl_mvm
*mvm
,
561 struct ieee80211_vif
*vif
,
562 u32 duration
, u32 min_duration
,
563 u32 max_delay
, bool wait_for_notif
)
565 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
566 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
567 const u16 te_notif_response
[] = { TIME_EVENT_NOTIFICATION
};
568 struct iwl_notification_wait wait_te_notif
;
569 struct iwl_time_event_cmd time_cmd
= {};
571 lockdep_assert_held(&mvm
->mutex
);
573 if (te_data
->running
&&
574 time_after(te_data
->end_jiffies
, TU_TO_EXP_TIME(min_duration
))) {
575 IWL_DEBUG_TE(mvm
, "We have enough time in the current TE: %u\n",
576 jiffies_to_msecs(te_data
->end_jiffies
- jiffies
));
580 if (te_data
->running
) {
581 IWL_DEBUG_TE(mvm
, "extend 0x%x: only %u ms left\n",
583 jiffies_to_msecs(te_data
->end_jiffies
- jiffies
));
585 * we don't have enough time
586 * cancel the current TE and issue a new one
587 * Of course it would be better to remove the old one only
588 * when the new one is added, but we don't care if we are off
589 * channel for a bit. All we need to do, is not to return
590 * before we actually begin to be on the channel.
592 iwl_mvm_stop_session_protection(mvm
, vif
);
595 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
596 time_cmd
.id_and_color
=
597 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
598 time_cmd
.id
= cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC
);
600 time_cmd
.apply_time
= cpu_to_le32(0);
602 time_cmd
.max_frags
= TE_V2_FRAG_NONE
;
603 time_cmd
.max_delay
= cpu_to_le32(max_delay
);
604 /* TODO: why do we need to interval = bi if it is not periodic? */
605 time_cmd
.interval
= cpu_to_le32(1);
606 time_cmd
.duration
= cpu_to_le32(duration
);
608 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
609 TE_V2_NOTIF_HOST_EVENT_END
|
610 T2_V2_START_IMMEDIATELY
);
612 if (!wait_for_notif
) {
613 iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);
618 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
619 * right after we send the time event
621 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_te_notif
,
623 ARRAY_SIZE(te_notif_response
),
624 iwl_mvm_te_notif
, te_data
);
626 /* If TE was sent OK - wait for the notification that started */
627 if (iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
)) {
628 IWL_ERR(mvm
, "Failed to add TE to protect session\n");
629 iwl_remove_notification(&mvm
->notif_wait
, &wait_te_notif
);
630 } else if (iwl_wait_notification(&mvm
->notif_wait
, &wait_te_notif
,
631 TU_TO_JIFFIES(max_delay
))) {
632 IWL_ERR(mvm
, "Failed to protect session until TE\n");
636 static bool __iwl_mvm_remove_time_event(struct iwl_mvm
*mvm
,
637 struct iwl_mvm_time_event_data
*te_data
,
643 * It is possible that by the time we got to this point the time
644 * event was already removed.
646 spin_lock_bh(&mvm
->time_event_lock
);
648 /* Save time event uid before clearing its data */
653 * The clear_data function handles time events that were already removed
655 iwl_mvm_te_clear_data(mvm
, te_data
);
656 spin_unlock_bh(&mvm
->time_event_lock
);
659 * It is possible that by the time we try to remove it, the time event
660 * has already ended and removed. In such a case there is no need to
661 * send a removal command.
664 IWL_DEBUG_TE(mvm
, "TE 0x%x has already ended\n", *uid
);
672 * Explicit request to remove a aux roc time event. The removal of a time
673 * event needs to be synchronized with the flow of a time event's end
674 * notification, which also removes the time event from the op mode
677 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm
*mvm
,
678 struct iwl_mvm_vif
*mvmvif
,
679 struct iwl_mvm_time_event_data
*te_data
)
681 struct iwl_hs20_roc_req aux_cmd
= {};
685 if (!__iwl_mvm_remove_time_event(mvm
, te_data
, &uid
))
688 aux_cmd
.event_unique_id
= cpu_to_le32(uid
);
689 aux_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
690 aux_cmd
.id_and_color
=
691 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
692 IWL_DEBUG_TE(mvm
, "Removing BSS AUX ROC TE 0x%x\n",
693 le32_to_cpu(aux_cmd
.event_unique_id
));
694 ret
= iwl_mvm_send_cmd_pdu(mvm
, HOT_SPOT_CMD
, 0,
695 sizeof(aux_cmd
), &aux_cmd
);
702 * Explicit request to remove a time event. The removal of a time event needs to
703 * be synchronized with the flow of a time event's end notification, which also
704 * removes the time event from the op mode data structures.
706 void iwl_mvm_remove_time_event(struct iwl_mvm
*mvm
,
707 struct iwl_mvm_vif
*mvmvif
,
708 struct iwl_mvm_time_event_data
*te_data
)
710 struct iwl_time_event_cmd time_cmd
= {};
714 if (!__iwl_mvm_remove_time_event(mvm
, te_data
, &uid
))
717 /* When we remove a TE, the UID is to be set in the id field */
718 time_cmd
.id
= cpu_to_le32(uid
);
719 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
720 time_cmd
.id_and_color
=
721 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
723 IWL_DEBUG_TE(mvm
, "Removing TE 0x%x\n", le32_to_cpu(time_cmd
.id
));
724 ret
= iwl_mvm_send_cmd_pdu(mvm
, TIME_EVENT_CMD
, 0,
725 sizeof(time_cmd
), &time_cmd
);
730 void iwl_mvm_stop_session_protection(struct iwl_mvm
*mvm
,
731 struct ieee80211_vif
*vif
)
733 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
734 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
736 lockdep_assert_held(&mvm
->mutex
);
737 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
740 int iwl_mvm_start_p2p_roc(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
741 int duration
, enum ieee80211_roc_type type
)
743 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
744 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
745 struct iwl_time_event_cmd time_cmd
= {};
747 lockdep_assert_held(&mvm
->mutex
);
748 if (te_data
->running
) {
749 IWL_WARN(mvm
, "P2P_DEVICE remain on channel already running\n");
754 * Flush the done work, just in case it's still pending, so that
755 * the work it does can complete and we can accept new frames.
757 flush_work(&mvm
->roc_done_wk
);
759 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
760 time_cmd
.id_and_color
=
761 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
764 case IEEE80211_ROC_TYPE_NORMAL
:
765 time_cmd
.id
= cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL
);
767 case IEEE80211_ROC_TYPE_MGMT_TX
:
768 time_cmd
.id
= cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX
);
771 WARN_ONCE(1, "Got an invalid ROC type\n");
775 time_cmd
.apply_time
= cpu_to_le32(0);
776 time_cmd
.interval
= cpu_to_le32(1);
779 * The P2P Device TEs can have lower priority than other events
780 * that are being scheduled by the driver/fw, and thus it might not be
781 * scheduled. To improve the chances of it being scheduled, allow them
782 * to be fragmented, and in addition allow them to be delayed.
784 time_cmd
.max_frags
= min(MSEC_TO_TU(duration
)/50, TE_V2_FRAG_ENDLESS
);
785 time_cmd
.max_delay
= cpu_to_le32(MSEC_TO_TU(duration
/2));
786 time_cmd
.duration
= cpu_to_le32(MSEC_TO_TU(duration
));
788 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
789 TE_V2_NOTIF_HOST_EVENT_END
|
790 T2_V2_START_IMMEDIATELY
);
792 return iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);
795 void iwl_mvm_stop_roc(struct iwl_mvm
*mvm
)
797 struct iwl_mvm_vif
*mvmvif
= NULL
;
798 struct iwl_mvm_time_event_data
*te_data
;
801 lockdep_assert_held(&mvm
->mutex
);
803 spin_lock_bh(&mvm
->time_event_lock
);
806 * Iterate over the list of time events and find the time event that is
807 * associated with a P2P_DEVICE interface.
808 * This assumes that a P2P_DEVICE interface can have only a single time
809 * event at any given time and this time event coresponds to a ROC
812 list_for_each_entry(te_data
, &mvm
->time_event_list
, list
) {
813 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
814 mvmvif
= iwl_mvm_vif_from_mac80211(te_data
->vif
);
820 /* There can only be at most one AUX ROC time event, we just use the
821 * list to simplify/unify code. Remove it if it exists.
823 te_data
= list_first_entry_or_null(&mvm
->aux_roc_te_list
,
824 struct iwl_mvm_time_event_data
,
827 mvmvif
= iwl_mvm_vif_from_mac80211(te_data
->vif
);
830 spin_unlock_bh(&mvm
->time_event_lock
);
833 IWL_WARN(mvm
, "No remain on channel event\n");
838 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
840 iwl_mvm_remove_aux_roc_te(mvm
, mvmvif
, te_data
);
842 iwl_mvm_roc_finished(mvm
);
845 int iwl_mvm_schedule_csa_period(struct iwl_mvm
*mvm
,
846 struct ieee80211_vif
*vif
,
847 u32 duration
, u32 apply_time
)
849 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
850 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
851 struct iwl_time_event_cmd time_cmd
= {};
853 lockdep_assert_held(&mvm
->mutex
);
855 if (te_data
->running
) {
856 IWL_DEBUG_TE(mvm
, "CS period is already scheduled\n");
860 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
861 time_cmd
.id_and_color
=
862 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
863 time_cmd
.id
= cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD
);
864 time_cmd
.apply_time
= cpu_to_le32(apply_time
);
865 time_cmd
.max_frags
= TE_V2_FRAG_NONE
;
866 time_cmd
.duration
= cpu_to_le32(duration
);
868 time_cmd
.interval
= cpu_to_le32(1);
869 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
872 return iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);