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
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2017 Intel Deutschland GmbH
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 *****************************************************************************/
68 #include <linux/jiffies.h>
69 #include <net/mac80211.h>
71 #include "fw/notif-wait.h"
72 #include "iwl-trans.h"
74 #include "time-event.h"
80 * For the high priority TE use a time event type that has similar priority to
81 * the FW's action scan priority.
83 #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE
84 #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC
86 void iwl_mvm_te_clear_data(struct iwl_mvm
*mvm
,
87 struct iwl_mvm_time_event_data
*te_data
)
89 lockdep_assert_held(&mvm
->time_event_lock
);
94 list_del(&te_data
->list
);
95 te_data
->running
= false;
101 void iwl_mvm_roc_done_wk(struct work_struct
*wk
)
103 struct iwl_mvm
*mvm
= container_of(wk
, struct iwl_mvm
, roc_done_wk
);
107 * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit.
108 * This will cause the TX path to drop offchannel transmissions.
109 * That would also be done by mac80211, but it is racy, in particular
110 * in the case that the time event actually completed in the firmware
111 * (which is handled in iwl_mvm_te_handle_notif).
113 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING
, &mvm
->status
)) {
114 queues
|= BIT(IWL_MVM_OFFCHANNEL_QUEUE
);
115 iwl_mvm_unref(mvm
, IWL_MVM_REF_ROC
);
117 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING
, &mvm
->status
)) {
118 queues
|= BIT(mvm
->aux_queue
);
119 iwl_mvm_unref(mvm
, IWL_MVM_REF_ROC_AUX
);
125 * Flush the offchannel queue -- this is called when the time
126 * event finishes or is canceled, so that frames queued for it
127 * won't get stuck on the queue and be transmitted in the next
129 * We have to send the command asynchronously since this cannot
130 * be under the mutex for locking reasons, but that's not an
131 * issue as it will have to complete before the next command is
132 * executed, and a new time event means a new command.
134 iwl_mvm_flush_sta(mvm
, &mvm
->aux_sta
, true, CMD_ASYNC
);
136 /* Do the same for the P2P device queue (STA) */
137 if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P
, &mvm
->status
)) {
138 struct iwl_mvm_vif
*mvmvif
;
141 * NB: access to this pointer would be racy, but the flush bit
142 * can only be set when we had a P2P-Device VIF, and we have a
143 * flush of this work in iwl_mvm_prepare_mac_removal() so it's
147 if (!WARN_ON(!mvm
->p2p_device_vif
)) {
148 mvmvif
= iwl_mvm_vif_from_mac80211(mvm
->p2p_device_vif
);
149 iwl_mvm_flush_sta(mvm
, &mvmvif
->bcast_sta
, true,
155 static void iwl_mvm_roc_finished(struct iwl_mvm
*mvm
)
158 * Of course, our status bit is just as racy as mac80211, so in
159 * addition, fire off the work struct which will drop all frames
160 * from the hardware queues that made it through the race. First
161 * it will of course synchronize the TX path to make sure that
162 * any *new* TX will be rejected.
164 schedule_work(&mvm
->roc_done_wk
);
167 static void iwl_mvm_csa_noa_start(struct iwl_mvm
*mvm
)
169 struct ieee80211_vif
*csa_vif
;
173 csa_vif
= rcu_dereference(mvm
->csa_vif
);
174 if (!csa_vif
|| !csa_vif
->csa_active
)
177 IWL_DEBUG_TE(mvm
, "CSA NOA started\n");
180 * CSA NoA is started but we still have beacons to
181 * transmit on the current channel.
182 * So we just do nothing here and the switch
183 * will be performed on the last TBTT.
185 if (!ieee80211_csa_is_complete(csa_vif
)) {
186 IWL_WARN(mvm
, "CSA NOA started too early\n");
190 ieee80211_csa_finish(csa_vif
);
194 RCU_INIT_POINTER(mvm
->csa_vif
, NULL
);
202 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm
*mvm
,
203 struct ieee80211_vif
*vif
,
206 if (vif
->type
!= NL80211_IFTYPE_STATION
)
208 if (vif
->bss_conf
.assoc
&& vif
->bss_conf
.dtim_period
)
211 IWL_ERR(mvm
, "%s\n", errmsg
);
213 iwl_mvm_connection_loss(mvm
, vif
, errmsg
);
218 iwl_mvm_te_handle_notify_csa(struct iwl_mvm
*mvm
,
219 struct iwl_mvm_time_event_data
*te_data
,
220 struct iwl_time_event_notif
*notif
)
222 struct ieee80211_vif
*vif
= te_data
->vif
;
223 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
226 IWL_DEBUG_TE(mvm
, "CSA time event failed to start\n");
228 switch (te_data
->vif
->type
) {
229 case NL80211_IFTYPE_AP
:
231 mvmvif
->csa_failed
= true;
232 iwl_mvm_csa_noa_start(mvm
);
234 case NL80211_IFTYPE_STATION
:
235 if (!notif
->status
) {
236 iwl_mvm_connection_loss(mvm
, vif
,
237 "CSA TE failed to start");
240 iwl_mvm_csa_client_absent(mvm
, te_data
->vif
);
241 ieee80211_chswitch_done(te_data
->vif
, true);
244 /* should never happen */
249 /* we don't need it anymore */
250 iwl_mvm_te_clear_data(mvm
, te_data
);
253 static void iwl_mvm_te_check_trigger(struct iwl_mvm
*mvm
,
254 struct iwl_time_event_notif
*notif
,
255 struct iwl_mvm_time_event_data
*te_data
)
257 struct iwl_fw_dbg_trigger_tlv
*trig
;
258 struct iwl_fw_dbg_trigger_time_event
*te_trig
;
261 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TIME_EVENT
))
264 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TIME_EVENT
);
265 te_trig
= (void *)trig
->data
;
267 if (!iwl_fw_dbg_trigger_check_stop(&mvm
->fwrt
,
268 ieee80211_vif_to_wdev(te_data
->vif
),
272 for (i
= 0; i
< ARRAY_SIZE(te_trig
->time_events
); i
++) {
273 u32 trig_te_id
= le32_to_cpu(te_trig
->time_events
[i
].id
);
274 u32 trig_action_bitmap
=
275 le32_to_cpu(te_trig
->time_events
[i
].action_bitmap
);
276 u32 trig_status_bitmap
=
277 le32_to_cpu(te_trig
->time_events
[i
].status_bitmap
);
279 if (trig_te_id
!= te_data
->id
||
280 !(trig_action_bitmap
& le32_to_cpu(notif
->action
)) ||
281 !(trig_status_bitmap
& BIT(le32_to_cpu(notif
->status
))))
284 iwl_fw_dbg_collect_trig(&mvm
->fwrt
, trig
,
285 "Time event %d Action 0x%x received status: %d",
287 le32_to_cpu(notif
->action
),
288 le32_to_cpu(notif
->status
));
294 * Handles a FW notification for an event that is known to the driver.
296 * @mvm: the mvm component
297 * @te_data: the time event data
298 * @notif: the notification data corresponding the time event data.
300 static void iwl_mvm_te_handle_notif(struct iwl_mvm
*mvm
,
301 struct iwl_mvm_time_event_data
*te_data
,
302 struct iwl_time_event_notif
*notif
)
304 lockdep_assert_held(&mvm
->time_event_lock
);
306 IWL_DEBUG_TE(mvm
, "Handle time event notif - UID = 0x%x action %d\n",
307 le32_to_cpu(notif
->unique_id
),
308 le32_to_cpu(notif
->action
));
310 iwl_mvm_te_check_trigger(mvm
, notif
, te_data
);
313 * The FW sends the start/end time event notifications even for events
314 * that it fails to schedule. This is indicated in the status field of
315 * the notification. This happens in cases that the scheduler cannot
316 * find a schedule that can handle the event (for example requesting a
317 * P2P Device discoveribility, while there are other higher priority
318 * events in the system).
320 if (!le32_to_cpu(notif
->status
)) {
323 if (notif
->action
& cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START
))
324 msg
= "Time Event start notification failure";
326 msg
= "Time Event end notification failure";
328 IWL_DEBUG_TE(mvm
, "%s\n", msg
);
330 if (iwl_mvm_te_check_disconnect(mvm
, te_data
->vif
, msg
)) {
331 iwl_mvm_te_clear_data(mvm
, te_data
);
336 if (le32_to_cpu(notif
->action
) & TE_V2_NOTIF_HOST_EVENT_END
) {
338 "TE ended - current time %lu, estimated end %lu\n",
339 jiffies
, te_data
->end_jiffies
);
341 switch (te_data
->vif
->type
) {
342 case NL80211_IFTYPE_P2P_DEVICE
:
343 ieee80211_remain_on_channel_expired(mvm
->hw
);
344 iwl_mvm_roc_finished(mvm
);
346 case NL80211_IFTYPE_STATION
:
348 * By now, we should have finished association
349 * and know the dtim period.
351 iwl_mvm_te_check_disconnect(mvm
, te_data
->vif
,
352 "No association and the time event is over already...");
358 iwl_mvm_te_clear_data(mvm
, te_data
);
359 } else if (le32_to_cpu(notif
->action
) & TE_V2_NOTIF_HOST_EVENT_START
) {
360 te_data
->running
= true;
361 te_data
->end_jiffies
= TU_TO_EXP_TIME(te_data
->duration
);
363 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
364 set_bit(IWL_MVM_STATUS_ROC_RUNNING
, &mvm
->status
);
365 iwl_mvm_ref(mvm
, IWL_MVM_REF_ROC
);
366 ieee80211_ready_on_channel(mvm
->hw
);
367 } else if (te_data
->id
== TE_CHANNEL_SWITCH_PERIOD
) {
368 iwl_mvm_te_handle_notify_csa(mvm
, te_data
, notif
);
371 IWL_WARN(mvm
, "Got TE with unknown action\n");
376 * Handle A Aux ROC time event
378 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm
*mvm
,
379 struct iwl_time_event_notif
*notif
)
381 struct iwl_mvm_time_event_data
*te_data
, *tmp
;
382 bool aux_roc_te
= false;
384 list_for_each_entry_safe(te_data
, tmp
, &mvm
->aux_roc_te_list
, list
) {
385 if (le32_to_cpu(notif
->unique_id
) == te_data
->uid
) {
390 if (!aux_roc_te
) /* Not a Aux ROC time event */
393 iwl_mvm_te_check_trigger(mvm
, notif
, te_data
);
396 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n",
397 le32_to_cpu(notif
->unique_id
),
398 le32_to_cpu(notif
->action
), le32_to_cpu(notif
->status
));
400 if (!le32_to_cpu(notif
->status
) ||
401 le32_to_cpu(notif
->action
) == TE_V2_NOTIF_HOST_EVENT_END
) {
402 /* End TE, notify mac80211 */
403 ieee80211_remain_on_channel_expired(mvm
->hw
);
404 iwl_mvm_roc_finished(mvm
); /* flush aux queue */
405 list_del(&te_data
->list
); /* remove from list */
406 te_data
->running
= false;
409 te_data
->id
= TE_MAX
;
410 } else if (le32_to_cpu(notif
->action
) == TE_V2_NOTIF_HOST_EVENT_START
) {
411 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING
, &mvm
->status
);
412 te_data
->running
= true;
413 iwl_mvm_ref(mvm
, IWL_MVM_REF_ROC_AUX
);
414 ieee80211_ready_on_channel(mvm
->hw
); /* Start TE */
417 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
418 le32_to_cpu(notif
->action
));
426 * The Rx handler for time event notifications
428 void iwl_mvm_rx_time_event_notif(struct iwl_mvm
*mvm
,
429 struct iwl_rx_cmd_buffer
*rxb
)
431 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
432 struct iwl_time_event_notif
*notif
= (void *)pkt
->data
;
433 struct iwl_mvm_time_event_data
*te_data
, *tmp
;
435 IWL_DEBUG_TE(mvm
, "Time event notification - UID = 0x%x action %d\n",
436 le32_to_cpu(notif
->unique_id
),
437 le32_to_cpu(notif
->action
));
439 spin_lock_bh(&mvm
->time_event_lock
);
440 /* This time event is triggered for Aux ROC request */
441 if (!iwl_mvm_aux_roc_te_handle_notif(mvm
, notif
))
444 list_for_each_entry_safe(te_data
, tmp
, &mvm
->time_event_list
, list
) {
445 if (le32_to_cpu(notif
->unique_id
) == te_data
->uid
)
446 iwl_mvm_te_handle_notif(mvm
, te_data
, notif
);
449 spin_unlock_bh(&mvm
->time_event_lock
);
452 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data
*notif_wait
,
453 struct iwl_rx_packet
*pkt
, void *data
)
455 struct iwl_mvm
*mvm
=
456 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
457 struct iwl_mvm_time_event_data
*te_data
= data
;
458 struct iwl_time_event_notif
*resp
;
459 int resp_len
= iwl_rx_packet_payload_len(pkt
);
461 if (WARN_ON(pkt
->hdr
.cmd
!= TIME_EVENT_NOTIFICATION
))
464 if (WARN_ON_ONCE(resp_len
!= sizeof(*resp
))) {
465 IWL_ERR(mvm
, "Invalid TIME_EVENT_NOTIFICATION response\n");
469 resp
= (void *)pkt
->data
;
471 /* te_data->uid is already set in the TIME_EVENT_CMD response */
472 if (le32_to_cpu(resp
->unique_id
) != te_data
->uid
)
475 IWL_DEBUG_TE(mvm
, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
479 "TIME_EVENT_NOTIFICATION received but not executed\n");
484 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data
*notif_wait
,
485 struct iwl_rx_packet
*pkt
, void *data
)
487 struct iwl_mvm
*mvm
=
488 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
489 struct iwl_mvm_time_event_data
*te_data
= data
;
490 struct iwl_time_event_resp
*resp
;
491 int resp_len
= iwl_rx_packet_payload_len(pkt
);
493 if (WARN_ON(pkt
->hdr
.cmd
!= TIME_EVENT_CMD
))
496 if (WARN_ON_ONCE(resp_len
!= sizeof(*resp
))) {
497 IWL_ERR(mvm
, "Invalid TIME_EVENT_CMD response\n");
501 resp
= (void *)pkt
->data
;
503 /* we should never get a response to another TIME_EVENT_CMD here */
504 if (WARN_ON_ONCE(le32_to_cpu(resp
->id
) != te_data
->id
))
507 te_data
->uid
= le32_to_cpu(resp
->unique_id
);
508 IWL_DEBUG_TE(mvm
, "TIME_EVENT_CMD response - UID = 0x%x\n",
513 static int iwl_mvm_time_event_send_add(struct iwl_mvm
*mvm
,
514 struct ieee80211_vif
*vif
,
515 struct iwl_mvm_time_event_data
*te_data
,
516 struct iwl_time_event_cmd
*te_cmd
)
518 static const u16 time_event_response
[] = { TIME_EVENT_CMD
};
519 struct iwl_notification_wait wait_time_event
;
522 lockdep_assert_held(&mvm
->mutex
);
524 IWL_DEBUG_TE(mvm
, "Add new TE, duration %d TU\n",
525 le32_to_cpu(te_cmd
->duration
));
527 spin_lock_bh(&mvm
->time_event_lock
);
528 if (WARN_ON(te_data
->id
!= TE_MAX
)) {
529 spin_unlock_bh(&mvm
->time_event_lock
);
533 te_data
->duration
= le32_to_cpu(te_cmd
->duration
);
534 te_data
->id
= le32_to_cpu(te_cmd
->id
);
535 list_add_tail(&te_data
->list
, &mvm
->time_event_list
);
536 spin_unlock_bh(&mvm
->time_event_lock
);
539 * Use a notification wait, which really just processes the
540 * command response and doesn't wait for anything, in order
541 * to be able to process the response and get the UID inside
542 * the RX path. Using CMD_WANT_SKB doesn't work because it
543 * stores the buffer and then wakes up this thread, by which
544 * time another notification (that the time event started)
545 * might already be processed unsuccessfully.
547 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_time_event
,
549 ARRAY_SIZE(time_event_response
),
550 iwl_mvm_time_event_response
, te_data
);
552 ret
= iwl_mvm_send_cmd_pdu(mvm
, TIME_EVENT_CMD
, 0,
553 sizeof(*te_cmd
), te_cmd
);
555 IWL_ERR(mvm
, "Couldn't send TIME_EVENT_CMD: %d\n", ret
);
556 iwl_remove_notification(&mvm
->notif_wait
, &wait_time_event
);
560 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
561 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_time_event
, 1);
562 /* should never fail */
567 spin_lock_bh(&mvm
->time_event_lock
);
568 iwl_mvm_te_clear_data(mvm
, te_data
);
569 spin_unlock_bh(&mvm
->time_event_lock
);
574 void iwl_mvm_protect_session(struct iwl_mvm
*mvm
,
575 struct ieee80211_vif
*vif
,
576 u32 duration
, u32 min_duration
,
577 u32 max_delay
, bool wait_for_notif
)
579 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
580 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
581 const u16 te_notif_response
[] = { TIME_EVENT_NOTIFICATION
};
582 struct iwl_notification_wait wait_te_notif
;
583 struct iwl_time_event_cmd time_cmd
= {};
585 lockdep_assert_held(&mvm
->mutex
);
587 if (te_data
->running
&&
588 time_after(te_data
->end_jiffies
, TU_TO_EXP_TIME(min_duration
))) {
589 IWL_DEBUG_TE(mvm
, "We have enough time in the current TE: %u\n",
590 jiffies_to_msecs(te_data
->end_jiffies
- jiffies
));
594 if (te_data
->running
) {
595 IWL_DEBUG_TE(mvm
, "extend 0x%x: only %u ms left\n",
597 jiffies_to_msecs(te_data
->end_jiffies
- jiffies
));
599 * we don't have enough time
600 * cancel the current TE and issue a new one
601 * Of course it would be better to remove the old one only
602 * when the new one is added, but we don't care if we are off
603 * channel for a bit. All we need to do, is not to return
604 * before we actually begin to be on the channel.
606 iwl_mvm_stop_session_protection(mvm
, vif
);
609 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
610 time_cmd
.id_and_color
=
611 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
612 time_cmd
.id
= cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC
);
614 time_cmd
.apply_time
= cpu_to_le32(0);
616 time_cmd
.max_frags
= TE_V2_FRAG_NONE
;
617 time_cmd
.max_delay
= cpu_to_le32(max_delay
);
618 /* TODO: why do we need to interval = bi if it is not periodic? */
619 time_cmd
.interval
= cpu_to_le32(1);
620 time_cmd
.duration
= cpu_to_le32(duration
);
622 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
623 TE_V2_NOTIF_HOST_EVENT_END
|
624 T2_V2_START_IMMEDIATELY
);
626 if (!wait_for_notif
) {
627 iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);
632 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
633 * right after we send the time event
635 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_te_notif
,
637 ARRAY_SIZE(te_notif_response
),
638 iwl_mvm_te_notif
, te_data
);
640 /* If TE was sent OK - wait for the notification that started */
641 if (iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
)) {
642 IWL_ERR(mvm
, "Failed to add TE to protect session\n");
643 iwl_remove_notification(&mvm
->notif_wait
, &wait_te_notif
);
644 } else if (iwl_wait_notification(&mvm
->notif_wait
, &wait_te_notif
,
645 TU_TO_JIFFIES(max_delay
))) {
646 IWL_ERR(mvm
, "Failed to protect session until TE\n");
650 static bool __iwl_mvm_remove_time_event(struct iwl_mvm
*mvm
,
651 struct iwl_mvm_time_event_data
*te_data
,
657 * It is possible that by the time we got to this point the time
658 * event was already removed.
660 spin_lock_bh(&mvm
->time_event_lock
);
662 /* Save time event uid before clearing its data */
667 * The clear_data function handles time events that were already removed
669 iwl_mvm_te_clear_data(mvm
, te_data
);
670 spin_unlock_bh(&mvm
->time_event_lock
);
673 * It is possible that by the time we try to remove it, the time event
674 * has already ended and removed. In such a case there is no need to
675 * send a removal command.
678 IWL_DEBUG_TE(mvm
, "TE 0x%x has already ended\n", *uid
);
686 * Explicit request to remove a aux roc time event. The removal of a time
687 * event needs to be synchronized with the flow of a time event's end
688 * notification, which also removes the time event from the op mode
691 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm
*mvm
,
692 struct iwl_mvm_vif
*mvmvif
,
693 struct iwl_mvm_time_event_data
*te_data
)
695 struct iwl_hs20_roc_req aux_cmd
= {};
699 if (!__iwl_mvm_remove_time_event(mvm
, te_data
, &uid
))
702 aux_cmd
.event_unique_id
= cpu_to_le32(uid
);
703 aux_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
704 aux_cmd
.id_and_color
=
705 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
706 IWL_DEBUG_TE(mvm
, "Removing BSS AUX ROC TE 0x%x\n",
707 le32_to_cpu(aux_cmd
.event_unique_id
));
708 ret
= iwl_mvm_send_cmd_pdu(mvm
, HOT_SPOT_CMD
, 0,
709 sizeof(aux_cmd
), &aux_cmd
);
716 * Explicit request to remove a time event. The removal of a time event needs to
717 * be synchronized with the flow of a time event's end notification, which also
718 * removes the time event from the op mode data structures.
720 void iwl_mvm_remove_time_event(struct iwl_mvm
*mvm
,
721 struct iwl_mvm_vif
*mvmvif
,
722 struct iwl_mvm_time_event_data
*te_data
)
724 struct iwl_time_event_cmd time_cmd
= {};
728 if (!__iwl_mvm_remove_time_event(mvm
, te_data
, &uid
))
731 /* When we remove a TE, the UID is to be set in the id field */
732 time_cmd
.id
= cpu_to_le32(uid
);
733 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
734 time_cmd
.id_and_color
=
735 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
737 IWL_DEBUG_TE(mvm
, "Removing TE 0x%x\n", le32_to_cpu(time_cmd
.id
));
738 ret
= iwl_mvm_send_cmd_pdu(mvm
, TIME_EVENT_CMD
, 0,
739 sizeof(time_cmd
), &time_cmd
);
744 void iwl_mvm_stop_session_protection(struct iwl_mvm
*mvm
,
745 struct ieee80211_vif
*vif
)
747 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
748 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
751 lockdep_assert_held(&mvm
->mutex
);
753 spin_lock_bh(&mvm
->time_event_lock
);
755 spin_unlock_bh(&mvm
->time_event_lock
);
757 if (id
!= TE_BSS_STA_AGGRESSIVE_ASSOC
) {
759 "don't remove TE with id=%u (not session protection)\n",
764 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
767 int iwl_mvm_start_p2p_roc(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
768 int duration
, enum ieee80211_roc_type type
)
770 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
771 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
772 struct iwl_time_event_cmd time_cmd
= {};
774 lockdep_assert_held(&mvm
->mutex
);
775 if (te_data
->running
) {
776 IWL_WARN(mvm
, "P2P_DEVICE remain on channel already running\n");
781 * Flush the done work, just in case it's still pending, so that
782 * the work it does can complete and we can accept new frames.
784 flush_work(&mvm
->roc_done_wk
);
786 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
787 time_cmd
.id_and_color
=
788 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
791 case IEEE80211_ROC_TYPE_NORMAL
:
792 time_cmd
.id
= cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL
);
794 case IEEE80211_ROC_TYPE_MGMT_TX
:
795 time_cmd
.id
= cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX
);
798 WARN_ONCE(1, "Got an invalid ROC type\n");
802 time_cmd
.apply_time
= cpu_to_le32(0);
803 time_cmd
.interval
= cpu_to_le32(1);
806 * The P2P Device TEs can have lower priority than other events
807 * that are being scheduled by the driver/fw, and thus it might not be
808 * scheduled. To improve the chances of it being scheduled, allow them
809 * to be fragmented, and in addition allow them to be delayed.
811 time_cmd
.max_frags
= min(MSEC_TO_TU(duration
)/50, TE_V2_FRAG_ENDLESS
);
812 time_cmd
.max_delay
= cpu_to_le32(MSEC_TO_TU(duration
/2));
813 time_cmd
.duration
= cpu_to_le32(MSEC_TO_TU(duration
));
815 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
816 TE_V2_NOTIF_HOST_EVENT_END
|
817 T2_V2_START_IMMEDIATELY
);
819 return iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);
822 static struct iwl_mvm_time_event_data
*iwl_mvm_get_roc_te(struct iwl_mvm
*mvm
)
824 struct iwl_mvm_time_event_data
*te_data
;
826 lockdep_assert_held(&mvm
->mutex
);
828 spin_lock_bh(&mvm
->time_event_lock
);
831 * Iterate over the list of time events and find the time event that is
832 * associated with a P2P_DEVICE interface.
833 * This assumes that a P2P_DEVICE interface can have only a single time
834 * event at any given time and this time event coresponds to a ROC
837 list_for_each_entry(te_data
, &mvm
->time_event_list
, list
) {
838 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
)
842 /* There can only be at most one AUX ROC time event, we just use the
843 * list to simplify/unify code. Remove it if it exists.
845 te_data
= list_first_entry_or_null(&mvm
->aux_roc_te_list
,
846 struct iwl_mvm_time_event_data
,
849 spin_unlock_bh(&mvm
->time_event_lock
);
853 void iwl_mvm_cleanup_roc_te(struct iwl_mvm
*mvm
)
855 struct iwl_mvm_time_event_data
*te_data
;
858 te_data
= iwl_mvm_get_roc_te(mvm
);
860 __iwl_mvm_remove_time_event(mvm
, te_data
, &uid
);
863 void iwl_mvm_stop_roc(struct iwl_mvm
*mvm
)
865 struct iwl_mvm_vif
*mvmvif
;
866 struct iwl_mvm_time_event_data
*te_data
;
868 te_data
= iwl_mvm_get_roc_te(mvm
);
870 IWL_WARN(mvm
, "No remain on channel event\n");
874 mvmvif
= iwl_mvm_vif_from_mac80211(te_data
->vif
);
876 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
877 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
878 set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P
, &mvm
->status
);
880 iwl_mvm_remove_aux_roc_te(mvm
, mvmvif
, te_data
);
883 iwl_mvm_roc_finished(mvm
);
886 int iwl_mvm_schedule_csa_period(struct iwl_mvm
*mvm
,
887 struct ieee80211_vif
*vif
,
888 u32 duration
, u32 apply_time
)
890 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
891 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
892 struct iwl_time_event_cmd time_cmd
= {};
894 lockdep_assert_held(&mvm
->mutex
);
896 if (te_data
->running
) {
899 spin_lock_bh(&mvm
->time_event_lock
);
901 spin_unlock_bh(&mvm
->time_event_lock
);
903 if (id
== TE_CHANNEL_SWITCH_PERIOD
) {
904 IWL_DEBUG_TE(mvm
, "CS period is already scheduled\n");
909 * Remove the session protection time event to allow the
910 * channel switch. If we got here, we just heard a beacon so
911 * the session protection is not needed anymore anyway.
913 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
916 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
917 time_cmd
.id_and_color
=
918 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
919 time_cmd
.id
= cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD
);
920 time_cmd
.apply_time
= cpu_to_le32(apply_time
);
921 time_cmd
.max_frags
= TE_V2_FRAG_NONE
;
922 time_cmd
.duration
= cpu_to_le32(duration
);
924 time_cmd
.interval
= cpu_to_le32(1);
925 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
928 return iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);