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"
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 iwl_mvm_unref(mvm
, IWL_MVM_REF_ROC
);
115 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING
, &mvm
->status
)) {
116 queues
|= BIT(mvm
->aux_queue
);
117 iwl_mvm_unref(mvm
, IWL_MVM_REF_ROC_AUX
);
123 * Flush the offchannel queue -- this is called when the time
124 * event finishes or is canceled, so that frames queued for it
125 * won't get stuck on the queue and be transmitted in the next
127 * We have to send the command asynchronously since this cannot
128 * be under the mutex for locking reasons, but that's not an
129 * issue as it will have to complete before the next command is
130 * executed, and a new time event means a new command.
132 iwl_mvm_flush_tx_path(mvm
, queues
, false);
135 static void iwl_mvm_roc_finished(struct iwl_mvm
*mvm
)
138 * Of course, our status bit is just as racy as mac80211, so in
139 * addition, fire off the work struct which will drop all frames
140 * from the hardware queues that made it through the race. First
141 * it will of course synchronize the TX path to make sure that
142 * any *new* TX will be rejected.
144 schedule_work(&mvm
->roc_done_wk
);
147 static void iwl_mvm_csa_noa_start(struct iwl_mvm
*mvm
)
149 struct ieee80211_vif
*csa_vif
;
153 csa_vif
= rcu_dereference(mvm
->csa_vif
);
154 if (!csa_vif
|| !csa_vif
->csa_active
)
157 IWL_DEBUG_TE(mvm
, "CSA NOA started\n");
160 * CSA NoA is started but we still have beacons to
161 * transmit on the current channel.
162 * So we just do nothing here and the switch
163 * will be performed on the last TBTT.
165 if (!ieee80211_csa_is_complete(csa_vif
)) {
166 IWL_WARN(mvm
, "CSA NOA started too early\n");
170 ieee80211_csa_finish(csa_vif
);
174 RCU_INIT_POINTER(mvm
->csa_vif
, NULL
);
182 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm
*mvm
,
183 struct ieee80211_vif
*vif
,
186 if (vif
->type
!= NL80211_IFTYPE_STATION
)
188 if (vif
->bss_conf
.assoc
&& vif
->bss_conf
.dtim_period
)
191 IWL_ERR(mvm
, "%s\n", errmsg
);
193 iwl_mvm_connection_loss(mvm
, vif
, errmsg
);
198 iwl_mvm_te_handle_notify_csa(struct iwl_mvm
*mvm
,
199 struct iwl_mvm_time_event_data
*te_data
,
200 struct iwl_time_event_notif
*notif
)
202 struct ieee80211_vif
*vif
= te_data
->vif
;
203 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
206 IWL_DEBUG_TE(mvm
, "CSA time event failed to start\n");
208 switch (te_data
->vif
->type
) {
209 case NL80211_IFTYPE_AP
:
211 mvmvif
->csa_failed
= true;
212 iwl_mvm_csa_noa_start(mvm
);
214 case NL80211_IFTYPE_STATION
:
215 if (!notif
->status
) {
216 iwl_mvm_connection_loss(mvm
, vif
,
217 "CSA TE failed to start");
220 iwl_mvm_csa_client_absent(mvm
, te_data
->vif
);
221 ieee80211_chswitch_done(te_data
->vif
, true);
224 /* should never happen */
229 /* we don't need it anymore */
230 iwl_mvm_te_clear_data(mvm
, te_data
);
233 static void iwl_mvm_te_check_trigger(struct iwl_mvm
*mvm
,
234 struct iwl_time_event_notif
*notif
,
235 struct iwl_mvm_time_event_data
*te_data
)
237 struct iwl_fw_dbg_trigger_tlv
*trig
;
238 struct iwl_fw_dbg_trigger_time_event
*te_trig
;
241 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TIME_EVENT
))
244 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TIME_EVENT
);
245 te_trig
= (void *)trig
->data
;
247 if (!iwl_fw_dbg_trigger_check_stop(mvm
, te_data
->vif
, trig
))
250 for (i
= 0; i
< ARRAY_SIZE(te_trig
->time_events
); i
++) {
251 u32 trig_te_id
= le32_to_cpu(te_trig
->time_events
[i
].id
);
252 u32 trig_action_bitmap
=
253 le32_to_cpu(te_trig
->time_events
[i
].action_bitmap
);
254 u32 trig_status_bitmap
=
255 le32_to_cpu(te_trig
->time_events
[i
].status_bitmap
);
257 if (trig_te_id
!= te_data
->id
||
258 !(trig_action_bitmap
& le32_to_cpu(notif
->action
)) ||
259 !(trig_status_bitmap
& BIT(le32_to_cpu(notif
->status
))))
262 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
263 "Time event %d Action 0x%x received status: %d",
265 le32_to_cpu(notif
->action
),
266 le32_to_cpu(notif
->status
));
272 * Handles a FW notification for an event that is known to the driver.
274 * @mvm: the mvm component
275 * @te_data: the time event data
276 * @notif: the notification data corresponding the time event data.
278 static void iwl_mvm_te_handle_notif(struct iwl_mvm
*mvm
,
279 struct iwl_mvm_time_event_data
*te_data
,
280 struct iwl_time_event_notif
*notif
)
282 lockdep_assert_held(&mvm
->time_event_lock
);
284 IWL_DEBUG_TE(mvm
, "Handle time event notif - UID = 0x%x action %d\n",
285 le32_to_cpu(notif
->unique_id
),
286 le32_to_cpu(notif
->action
));
288 iwl_mvm_te_check_trigger(mvm
, notif
, te_data
);
291 * The FW sends the start/end time event notifications even for events
292 * that it fails to schedule. This is indicated in the status field of
293 * the notification. This happens in cases that the scheduler cannot
294 * find a schedule that can handle the event (for example requesting a
295 * P2P Device discoveribility, while there are other higher priority
296 * events in the system).
298 if (!le32_to_cpu(notif
->status
)) {
301 if (notif
->action
& cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START
))
302 msg
= "Time Event start notification failure";
304 msg
= "Time Event end notification failure";
306 IWL_DEBUG_TE(mvm
, "%s\n", msg
);
308 if (iwl_mvm_te_check_disconnect(mvm
, te_data
->vif
, msg
)) {
309 iwl_mvm_te_clear_data(mvm
, te_data
);
314 if (le32_to_cpu(notif
->action
) & TE_V2_NOTIF_HOST_EVENT_END
) {
316 "TE ended - current time %lu, estimated end %lu\n",
317 jiffies
, te_data
->end_jiffies
);
319 switch (te_data
->vif
->type
) {
320 case NL80211_IFTYPE_P2P_DEVICE
:
321 ieee80211_remain_on_channel_expired(mvm
->hw
);
322 iwl_mvm_roc_finished(mvm
);
324 case NL80211_IFTYPE_STATION
:
326 * By now, we should have finished association
327 * and know the dtim period.
329 iwl_mvm_te_check_disconnect(mvm
, te_data
->vif
,
330 "No association and the time event is over already...");
336 iwl_mvm_te_clear_data(mvm
, te_data
);
337 } else if (le32_to_cpu(notif
->action
) & TE_V2_NOTIF_HOST_EVENT_START
) {
338 te_data
->running
= true;
339 te_data
->end_jiffies
= TU_TO_EXP_TIME(te_data
->duration
);
341 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
342 set_bit(IWL_MVM_STATUS_ROC_RUNNING
, &mvm
->status
);
343 iwl_mvm_ref(mvm
, IWL_MVM_REF_ROC
);
344 ieee80211_ready_on_channel(mvm
->hw
);
345 } else if (te_data
->id
== TE_CHANNEL_SWITCH_PERIOD
) {
346 iwl_mvm_te_handle_notify_csa(mvm
, te_data
, notif
);
349 IWL_WARN(mvm
, "Got TE with unknown action\n");
354 * Handle A Aux ROC time event
356 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm
*mvm
,
357 struct iwl_time_event_notif
*notif
)
359 struct iwl_mvm_time_event_data
*te_data
, *tmp
;
360 bool aux_roc_te
= false;
362 list_for_each_entry_safe(te_data
, tmp
, &mvm
->aux_roc_te_list
, list
) {
363 if (le32_to_cpu(notif
->unique_id
) == te_data
->uid
) {
368 if (!aux_roc_te
) /* Not a Aux ROC time event */
371 iwl_mvm_te_check_trigger(mvm
, notif
, te_data
);
373 if (!le32_to_cpu(notif
->status
)) {
375 "ERROR: Aux ROC Time Event %s notification failure\n",
376 (le32_to_cpu(notif
->action
) &
377 TE_V2_NOTIF_HOST_EVENT_START
) ? "start" : "end");
382 "Aux ROC time event notification - UID = 0x%x action %d\n",
383 le32_to_cpu(notif
->unique_id
),
384 le32_to_cpu(notif
->action
));
386 if (le32_to_cpu(notif
->action
) == TE_V2_NOTIF_HOST_EVENT_END
) {
387 /* End TE, notify mac80211 */
388 ieee80211_remain_on_channel_expired(mvm
->hw
);
389 iwl_mvm_roc_finished(mvm
); /* flush aux queue */
390 list_del(&te_data
->list
); /* remove from list */
391 te_data
->running
= false;
394 te_data
->id
= TE_MAX
;
395 } else if (le32_to_cpu(notif
->action
) == TE_V2_NOTIF_HOST_EVENT_START
) {
396 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING
, &mvm
->status
);
397 te_data
->running
= true;
398 iwl_mvm_ref(mvm
, IWL_MVM_REF_ROC_AUX
);
399 ieee80211_ready_on_channel(mvm
->hw
); /* Start TE */
402 "ERROR: Unknown Aux ROC Time Event (action = %d)\n",
403 le32_to_cpu(notif
->action
));
411 * The Rx handler for time event notifications
413 int iwl_mvm_rx_time_event_notif(struct iwl_mvm
*mvm
,
414 struct iwl_rx_cmd_buffer
*rxb
,
415 struct iwl_device_cmd
*cmd
)
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
);
440 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data
*notif_wait
,
441 struct iwl_rx_packet
*pkt
, void *data
)
443 struct iwl_mvm
*mvm
=
444 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
445 struct iwl_mvm_time_event_data
*te_data
= data
;
446 struct iwl_time_event_notif
*resp
;
447 int resp_len
= iwl_rx_packet_payload_len(pkt
);
449 if (WARN_ON(pkt
->hdr
.cmd
!= TIME_EVENT_NOTIFICATION
))
452 if (WARN_ON_ONCE(resp_len
!= sizeof(*resp
))) {
453 IWL_ERR(mvm
, "Invalid TIME_EVENT_NOTIFICATION response\n");
457 resp
= (void *)pkt
->data
;
459 /* te_data->uid is already set in the TIME_EVENT_CMD response */
460 if (le32_to_cpu(resp
->unique_id
) != te_data
->uid
)
463 IWL_DEBUG_TE(mvm
, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
467 "TIME_EVENT_NOTIFICATION received but not executed\n");
472 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data
*notif_wait
,
473 struct iwl_rx_packet
*pkt
, void *data
)
475 struct iwl_mvm
*mvm
=
476 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
477 struct iwl_mvm_time_event_data
*te_data
= data
;
478 struct iwl_time_event_resp
*resp
;
479 int resp_len
= iwl_rx_packet_payload_len(pkt
);
481 if (WARN_ON(pkt
->hdr
.cmd
!= TIME_EVENT_CMD
))
484 if (WARN_ON_ONCE(resp_len
!= sizeof(*resp
))) {
485 IWL_ERR(mvm
, "Invalid TIME_EVENT_CMD response\n");
489 resp
= (void *)pkt
->data
;
491 /* we should never get a response to another TIME_EVENT_CMD here */
492 if (WARN_ON_ONCE(le32_to_cpu(resp
->id
) != te_data
->id
))
495 te_data
->uid
= le32_to_cpu(resp
->unique_id
);
496 IWL_DEBUG_TE(mvm
, "TIME_EVENT_CMD response - UID = 0x%x\n",
501 static int iwl_mvm_time_event_send_add(struct iwl_mvm
*mvm
,
502 struct ieee80211_vif
*vif
,
503 struct iwl_mvm_time_event_data
*te_data
,
504 struct iwl_time_event_cmd
*te_cmd
)
506 static const u8 time_event_response
[] = { TIME_EVENT_CMD
};
507 struct iwl_notification_wait wait_time_event
;
510 lockdep_assert_held(&mvm
->mutex
);
512 IWL_DEBUG_TE(mvm
, "Add new TE, duration %d TU\n",
513 le32_to_cpu(te_cmd
->duration
));
515 spin_lock_bh(&mvm
->time_event_lock
);
516 if (WARN_ON(te_data
->id
!= TE_MAX
)) {
517 spin_unlock_bh(&mvm
->time_event_lock
);
521 te_data
->duration
= le32_to_cpu(te_cmd
->duration
);
522 te_data
->id
= le32_to_cpu(te_cmd
->id
);
523 list_add_tail(&te_data
->list
, &mvm
->time_event_list
);
524 spin_unlock_bh(&mvm
->time_event_lock
);
527 * Use a notification wait, which really just processes the
528 * command response and doesn't wait for anything, in order
529 * to be able to process the response and get the UID inside
530 * the RX path. Using CMD_WANT_SKB doesn't work because it
531 * stores the buffer and then wakes up this thread, by which
532 * time another notification (that the time event started)
533 * might already be processed unsuccessfully.
535 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_time_event
,
537 ARRAY_SIZE(time_event_response
),
538 iwl_mvm_time_event_response
, te_data
);
540 ret
= iwl_mvm_send_cmd_pdu(mvm
, TIME_EVENT_CMD
, 0,
541 sizeof(*te_cmd
), te_cmd
);
543 IWL_ERR(mvm
, "Couldn't send TIME_EVENT_CMD: %d\n", ret
);
544 iwl_remove_notification(&mvm
->notif_wait
, &wait_time_event
);
548 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
549 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_time_event
, 1);
550 /* should never fail */
555 spin_lock_bh(&mvm
->time_event_lock
);
556 iwl_mvm_te_clear_data(mvm
, te_data
);
557 spin_unlock_bh(&mvm
->time_event_lock
);
562 void iwl_mvm_protect_session(struct iwl_mvm
*mvm
,
563 struct ieee80211_vif
*vif
,
564 u32 duration
, u32 min_duration
,
565 u32 max_delay
, bool wait_for_notif
)
567 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
568 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
569 const u8 te_notif_response
[] = { TIME_EVENT_NOTIFICATION
};
570 struct iwl_notification_wait wait_te_notif
;
571 struct iwl_time_event_cmd time_cmd
= {};
573 lockdep_assert_held(&mvm
->mutex
);
575 if (te_data
->running
&&
576 time_after(te_data
->end_jiffies
, TU_TO_EXP_TIME(min_duration
))) {
577 IWL_DEBUG_TE(mvm
, "We have enough time in the current TE: %u\n",
578 jiffies_to_msecs(te_data
->end_jiffies
- jiffies
));
582 if (te_data
->running
) {
583 IWL_DEBUG_TE(mvm
, "extend 0x%x: only %u ms left\n",
585 jiffies_to_msecs(te_data
->end_jiffies
- jiffies
));
587 * we don't have enough time
588 * cancel the current TE and issue a new one
589 * Of course it would be better to remove the old one only
590 * when the new one is added, but we don't care if we are off
591 * channel for a bit. All we need to do, is not to return
592 * before we actually begin to be on the channel.
594 iwl_mvm_stop_session_protection(mvm
, vif
);
597 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
598 time_cmd
.id_and_color
=
599 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
600 time_cmd
.id
= cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC
);
602 time_cmd
.apply_time
=
603 cpu_to_le32(iwl_read_prph(mvm
->trans
, DEVICE_SYSTEM_TIME_REG
));
605 time_cmd
.max_frags
= TE_V2_FRAG_NONE
;
606 time_cmd
.max_delay
= cpu_to_le32(max_delay
);
607 /* TODO: why do we need to interval = bi if it is not periodic? */
608 time_cmd
.interval
= cpu_to_le32(1);
609 time_cmd
.duration
= cpu_to_le32(duration
);
611 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
612 TE_V2_NOTIF_HOST_EVENT_END
|
613 T2_V2_START_IMMEDIATELY
);
615 if (!wait_for_notif
) {
616 iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);
621 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use
622 * right after we send the time event
624 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_te_notif
,
626 ARRAY_SIZE(te_notif_response
),
627 iwl_mvm_te_notif
, te_data
);
629 /* If TE was sent OK - wait for the notification that started */
630 if (iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
)) {
631 IWL_ERR(mvm
, "Failed to add TE to protect session\n");
632 iwl_remove_notification(&mvm
->notif_wait
, &wait_te_notif
);
633 } else if (iwl_wait_notification(&mvm
->notif_wait
, &wait_te_notif
,
634 TU_TO_JIFFIES(max_delay
))) {
635 IWL_ERR(mvm
, "Failed to protect session until TE\n");
639 static bool __iwl_mvm_remove_time_event(struct iwl_mvm
*mvm
,
640 struct iwl_mvm_time_event_data
*te_data
,
646 * It is possible that by the time we got to this point the time
647 * event was already removed.
649 spin_lock_bh(&mvm
->time_event_lock
);
651 /* Save time event uid before clearing its data */
656 * The clear_data function handles time events that were already removed
658 iwl_mvm_te_clear_data(mvm
, te_data
);
659 spin_unlock_bh(&mvm
->time_event_lock
);
662 * It is possible that by the time we try to remove it, the time event
663 * has already ended and removed. In such a case there is no need to
664 * send a removal command.
667 IWL_DEBUG_TE(mvm
, "TE 0x%x has already ended\n", *uid
);
675 * Explicit request to remove a aux roc time event. The removal of a time
676 * event needs to be synchronized with the flow of a time event's end
677 * notification, which also removes the time event from the op mode
680 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm
*mvm
,
681 struct iwl_mvm_vif
*mvmvif
,
682 struct iwl_mvm_time_event_data
*te_data
)
684 struct iwl_hs20_roc_req aux_cmd
= {};
688 if (!__iwl_mvm_remove_time_event(mvm
, te_data
, &uid
))
691 aux_cmd
.event_unique_id
= cpu_to_le32(uid
);
692 aux_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
693 aux_cmd
.id_and_color
=
694 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
695 IWL_DEBUG_TE(mvm
, "Removing BSS AUX ROC TE 0x%x\n",
696 le32_to_cpu(aux_cmd
.event_unique_id
));
697 ret
= iwl_mvm_send_cmd_pdu(mvm
, HOT_SPOT_CMD
, 0,
698 sizeof(aux_cmd
), &aux_cmd
);
705 * Explicit request to remove a time event. The removal of a time event needs to
706 * be synchronized with the flow of a time event's end notification, which also
707 * removes the time event from the op mode data structures.
709 void iwl_mvm_remove_time_event(struct iwl_mvm
*mvm
,
710 struct iwl_mvm_vif
*mvmvif
,
711 struct iwl_mvm_time_event_data
*te_data
)
713 struct iwl_time_event_cmd time_cmd
= {};
717 if (!__iwl_mvm_remove_time_event(mvm
, te_data
, &uid
))
720 /* When we remove a TE, the UID is to be set in the id field */
721 time_cmd
.id
= cpu_to_le32(uid
);
722 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_REMOVE
);
723 time_cmd
.id_and_color
=
724 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
726 IWL_DEBUG_TE(mvm
, "Removing TE 0x%x\n", le32_to_cpu(time_cmd
.id
));
727 ret
= iwl_mvm_send_cmd_pdu(mvm
, TIME_EVENT_CMD
, 0,
728 sizeof(time_cmd
), &time_cmd
);
733 void iwl_mvm_stop_session_protection(struct iwl_mvm
*mvm
,
734 struct ieee80211_vif
*vif
)
736 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
737 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
739 lockdep_assert_held(&mvm
->mutex
);
740 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
743 int iwl_mvm_start_p2p_roc(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
744 int duration
, enum ieee80211_roc_type type
)
746 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
747 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
748 struct iwl_time_event_cmd time_cmd
= {};
750 lockdep_assert_held(&mvm
->mutex
);
751 if (te_data
->running
) {
752 IWL_WARN(mvm
, "P2P_DEVICE remain on channel already running\n");
757 * Flush the done work, just in case it's still pending, so that
758 * the work it does can complete and we can accept new frames.
760 flush_work(&mvm
->roc_done_wk
);
762 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
763 time_cmd
.id_and_color
=
764 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
767 case IEEE80211_ROC_TYPE_NORMAL
:
768 time_cmd
.id
= cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL
);
770 case IEEE80211_ROC_TYPE_MGMT_TX
:
771 time_cmd
.id
= cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX
);
774 WARN_ONCE(1, "Got an invalid ROC type\n");
778 time_cmd
.apply_time
= cpu_to_le32(0);
779 time_cmd
.interval
= cpu_to_le32(1);
782 * The P2P Device TEs can have lower priority than other events
783 * that are being scheduled by the driver/fw, and thus it might not be
784 * scheduled. To improve the chances of it being scheduled, allow them
785 * to be fragmented, and in addition allow them to be delayed.
787 time_cmd
.max_frags
= min(MSEC_TO_TU(duration
)/50, TE_V2_FRAG_ENDLESS
);
788 time_cmd
.max_delay
= cpu_to_le32(MSEC_TO_TU(duration
/2));
789 time_cmd
.duration
= cpu_to_le32(MSEC_TO_TU(duration
));
791 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
792 TE_V2_NOTIF_HOST_EVENT_END
|
793 T2_V2_START_IMMEDIATELY
);
795 return iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);
798 void iwl_mvm_stop_roc(struct iwl_mvm
*mvm
)
800 struct iwl_mvm_vif
*mvmvif
= NULL
;
801 struct iwl_mvm_time_event_data
*te_data
;
804 lockdep_assert_held(&mvm
->mutex
);
806 spin_lock_bh(&mvm
->time_event_lock
);
809 * Iterate over the list of time events and find the time event that is
810 * associated with a P2P_DEVICE interface.
811 * This assumes that a P2P_DEVICE interface can have only a single time
812 * event at any given time and this time event coresponds to a ROC
815 list_for_each_entry(te_data
, &mvm
->time_event_list
, list
) {
816 if (te_data
->vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
817 mvmvif
= iwl_mvm_vif_from_mac80211(te_data
->vif
);
823 /* There can only be at most one AUX ROC time event, we just use the
824 * list to simplify/unify code. Remove it if it exists.
826 te_data
= list_first_entry_or_null(&mvm
->aux_roc_te_list
,
827 struct iwl_mvm_time_event_data
,
830 mvmvif
= iwl_mvm_vif_from_mac80211(te_data
->vif
);
833 spin_unlock_bh(&mvm
->time_event_lock
);
836 IWL_WARN(mvm
, "No remain on channel event\n");
841 iwl_mvm_remove_time_event(mvm
, mvmvif
, te_data
);
843 iwl_mvm_remove_aux_roc_te(mvm
, mvmvif
, te_data
);
845 iwl_mvm_roc_finished(mvm
);
848 int iwl_mvm_schedule_csa_period(struct iwl_mvm
*mvm
,
849 struct ieee80211_vif
*vif
,
850 u32 duration
, u32 apply_time
)
852 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
853 struct iwl_mvm_time_event_data
*te_data
= &mvmvif
->time_event_data
;
854 struct iwl_time_event_cmd time_cmd
= {};
856 lockdep_assert_held(&mvm
->mutex
);
858 if (te_data
->running
) {
859 IWL_DEBUG_TE(mvm
, "CS period is already scheduled\n");
863 time_cmd
.action
= cpu_to_le32(FW_CTXT_ACTION_ADD
);
864 time_cmd
.id_and_color
=
865 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif
->id
, mvmvif
->color
));
866 time_cmd
.id
= cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD
);
867 time_cmd
.apply_time
= cpu_to_le32(apply_time
);
868 time_cmd
.max_frags
= TE_V2_FRAG_NONE
;
869 time_cmd
.duration
= cpu_to_le32(duration
);
871 time_cmd
.interval
= cpu_to_le32(1);
872 time_cmd
.policy
= cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START
|
875 return iwl_mvm_time_event_send_add(mvm
, vif
, te_data
, &time_cmd
);