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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
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. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
51368bf7 | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
c779273b | 9 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
3edfb5f4 | 10 | * Copyright(c) 2017 Intel Deutschland GmbH |
f6780614 | 11 | * Copyright(c) 2018 - 2019 Intel Corporation |
8ca151b5 JB |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of version 2 of the GNU General Public License as | |
15 | * published by the Free Software Foundation. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
8ca151b5 | 22 | * The full GNU General Public License is included in this distribution |
410dc5aa | 23 | * in the file called COPYING. |
8ca151b5 JB |
24 | * |
25 | * Contact Information: | |
d01c5366 | 26 | * Intel Linux Wireless <linuxwifi@intel.com> |
8ca151b5 JB |
27 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
28 | * | |
29 | * BSD LICENSE | |
30 | * | |
51368bf7 | 31 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
c779273b | 32 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
3edfb5f4 | 33 | * Copyright(c) 2017 Intel Deutschland GmbH |
f6780614 | 34 | * Copyright(c) 2018 - 2019 Intel Corporation |
8ca151b5 JB |
35 | * All rights reserved. |
36 | * | |
37 | * Redistribution and use in source and binary forms, with or without | |
38 | * modification, are permitted provided that the following conditions | |
39 | * are met: | |
40 | * | |
41 | * * Redistributions of source code must retain the above copyright | |
42 | * notice, this list of conditions and the following disclaimer. | |
43 | * * Redistributions in binary form must reproduce the above copyright | |
44 | * notice, this list of conditions and the following disclaimer in | |
45 | * the documentation and/or other materials provided with the | |
46 | * distribution. | |
47 | * * Neither the name Intel Corporation nor the names of its | |
48 | * contributors may be used to endorse or promote products derived | |
49 | * from this software without specific prior written permission. | |
50 | * | |
51 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
52 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
53 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
54 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
55 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
56 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
57 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
58 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
59 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
60 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
61 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
62 | * | |
63 | *****************************************************************************/ | |
64 | ||
65 | #include <linux/jiffies.h> | |
66 | #include <net/mac80211.h> | |
67 | ||
9fca9d5c | 68 | #include "fw/notif-wait.h" |
8ca151b5 JB |
69 | #include "iwl-trans.h" |
70 | #include "fw-api.h" | |
71 | #include "time-event.h" | |
72 | #include "mvm.h" | |
73 | #include "iwl-io.h" | |
74 | #include "iwl-prph.h" | |
75 | ||
e635c797 IP |
76 | /* |
77 | * For the high priority TE use a time event type that has similar priority to | |
78 | * the FW's action scan priority. | |
456f6ddf | 79 | */ |
e635c797 IP |
80 | #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE |
81 | #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC | |
456f6ddf | 82 | |
8ca151b5 JB |
83 | void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
84 | struct iwl_mvm_time_event_data *te_data) | |
85 | { | |
86 | lockdep_assert_held(&mvm->time_event_lock); | |
87 | ||
cee859fe | 88 | if (!te_data || !te_data->vif) |
8ca151b5 JB |
89 | return; |
90 | ||
91 | list_del(&te_data->list); | |
92 | te_data->running = false; | |
93 | te_data->uid = 0; | |
94 | te_data->id = TE_MAX; | |
95 | te_data->vif = NULL; | |
96 | } | |
97 | ||
98 | void iwl_mvm_roc_done_wk(struct work_struct *wk) | |
99 | { | |
100 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); | |
b112889c AM |
101 | |
102 | /* | |
103 | * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit. | |
104 | * This will cause the TX path to drop offchannel transmissions. | |
105 | * That would also be done by mac80211, but it is racy, in particular | |
106 | * in the case that the time event actually completed in the firmware | |
107 | * (which is handled in iwl_mvm_te_handle_notif). | |
108 | */ | |
58d3bef4 EG |
109 | clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); |
110 | clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); | |
8ca151b5 JB |
111 | |
112 | synchronize_net(); | |
113 | ||
114 | /* | |
115 | * Flush the offchannel queue -- this is called when the time | |
0d365ae5 | 116 | * event finishes or is canceled, so that frames queued for it |
8ca151b5 JB |
117 | * won't get stuck on the queue and be transmitted in the next |
118 | * time event. | |
119 | * We have to send the command asynchronously since this cannot | |
120 | * be under the mutex for locking reasons, but that's not an | |
121 | * issue as it will have to complete before the next command is | |
122 | * executed, and a new time event means a new command. | |
123 | */ | |
c8f54701 | 124 | iwl_mvm_flush_sta(mvm, &mvm->aux_sta, true, CMD_ASYNC); |
6c2d49fd JB |
125 | |
126 | /* Do the same for the P2P device queue (STA) */ | |
127 | if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) { | |
128 | struct iwl_mvm_vif *mvmvif; | |
129 | ||
130 | /* | |
131 | * NB: access to this pointer would be racy, but the flush bit | |
132 | * can only be set when we had a P2P-Device VIF, and we have a | |
133 | * flush of this work in iwl_mvm_prepare_mac_removal() so it's | |
134 | * not really racy. | |
135 | */ | |
136 | ||
137 | if (!WARN_ON(!mvm->p2p_device_vif)) { | |
138 | mvmvif = iwl_mvm_vif_from_mac80211(mvm->p2p_device_vif); | |
139 | iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, | |
140 | CMD_ASYNC); | |
141 | } | |
142 | } | |
8ca151b5 JB |
143 | } |
144 | ||
145 | static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) | |
146 | { | |
8ca151b5 JB |
147 | /* |
148 | * Of course, our status bit is just as racy as mac80211, so in | |
149 | * addition, fire off the work struct which will drop all frames | |
150 | * from the hardware queues that made it through the race. First | |
151 | * it will of course synchronize the TX path to make sure that | |
152 | * any *new* TX will be rejected. | |
153 | */ | |
154 | schedule_work(&mvm->roc_done_wk); | |
155 | } | |
156 | ||
7f0a7c67 AO |
157 | static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) |
158 | { | |
159 | struct ieee80211_vif *csa_vif; | |
160 | ||
161 | rcu_read_lock(); | |
162 | ||
163 | csa_vif = rcu_dereference(mvm->csa_vif); | |
164 | if (!csa_vif || !csa_vif->csa_active) | |
165 | goto out_unlock; | |
166 | ||
167 | IWL_DEBUG_TE(mvm, "CSA NOA started\n"); | |
168 | ||
169 | /* | |
170 | * CSA NoA is started but we still have beacons to | |
171 | * transmit on the current channel. | |
172 | * So we just do nothing here and the switch | |
173 | * will be performed on the last TBTT. | |
174 | */ | |
8552a434 | 175 | if (!ieee80211_beacon_cntdwn_is_complete(csa_vif)) { |
7f0a7c67 AO |
176 | IWL_WARN(mvm, "CSA NOA started too early\n"); |
177 | goto out_unlock; | |
178 | } | |
179 | ||
180 | ieee80211_csa_finish(csa_vif); | |
181 | ||
182 | rcu_read_unlock(); | |
183 | ||
184 | RCU_INIT_POINTER(mvm->csa_vif, NULL); | |
185 | ||
186 | return; | |
187 | ||
188 | out_unlock: | |
189 | rcu_read_unlock(); | |
190 | } | |
191 | ||
05739794 JB |
192 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
193 | struct ieee80211_vif *vif, | |
194 | const char *errmsg) | |
195 | { | |
19125cb0 AO |
196 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
197 | ||
05739794 JB |
198 | if (vif->type != NL80211_IFTYPE_STATION) |
199 | return false; | |
19125cb0 AO |
200 | |
201 | if (!mvmvif->csa_bcn_pending && vif->bss_conf.assoc && | |
202 | vif->bss_conf.dtim_period) | |
05739794 JB |
203 | return false; |
204 | if (errmsg) | |
205 | IWL_ERR(mvm, "%s\n", errmsg); | |
31755207 EG |
206 | |
207 | iwl_mvm_connection_loss(mvm, vif, errmsg); | |
05739794 JB |
208 | return true; |
209 | } | |
210 | ||
dc88b4ba LC |
211 | static void |
212 | iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, | |
213 | struct iwl_mvm_time_event_data *te_data, | |
214 | struct iwl_time_event_notif *notif) | |
215 | { | |
81d62d5a JB |
216 | struct ieee80211_vif *vif = te_data->vif; |
217 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
218 | ||
219 | if (!notif->status) | |
dc88b4ba | 220 | IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); |
dc88b4ba LC |
221 | |
222 | switch (te_data->vif->type) { | |
223 | case NL80211_IFTYPE_AP: | |
81d62d5a JB |
224 | if (!notif->status) |
225 | mvmvif->csa_failed = true; | |
dc88b4ba LC |
226 | iwl_mvm_csa_noa_start(mvm); |
227 | break; | |
228 | case NL80211_IFTYPE_STATION: | |
81d62d5a | 229 | if (!notif->status) { |
31755207 EG |
230 | iwl_mvm_connection_loss(mvm, vif, |
231 | "CSA TE failed to start"); | |
81d62d5a JB |
232 | break; |
233 | } | |
dc88b4ba | 234 | iwl_mvm_csa_client_absent(mvm, te_data->vif); |
11af74ad | 235 | cancel_delayed_work(&mvmvif->csa_work); |
622e3f9b | 236 | ieee80211_chswitch_done(te_data->vif, true); |
dc88b4ba LC |
237 | break; |
238 | default: | |
239 | /* should never happen */ | |
240 | WARN_ON_ONCE(1); | |
241 | break; | |
242 | } | |
243 | ||
244 | /* we don't need it anymore */ | |
245 | iwl_mvm_te_clear_data(mvm, te_data); | |
246 | } | |
247 | ||
874c174e EG |
248 | static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, |
249 | struct iwl_time_event_notif *notif, | |
250 | struct iwl_mvm_time_event_data *te_data) | |
251 | { | |
252 | struct iwl_fw_dbg_trigger_tlv *trig; | |
253 | struct iwl_fw_dbg_trigger_time_event *te_trig; | |
254 | int i; | |
255 | ||
6c042d75 SS |
256 | trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, |
257 | ieee80211_vif_to_wdev(te_data->vif), | |
258 | FW_DBG_TRIGGER_TIME_EVENT); | |
259 | if (!trig) | |
874c174e EG |
260 | return; |
261 | ||
874c174e EG |
262 | te_trig = (void *)trig->data; |
263 | ||
874c174e EG |
264 | for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { |
265 | u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); | |
266 | u32 trig_action_bitmap = | |
267 | le32_to_cpu(te_trig->time_events[i].action_bitmap); | |
268 | u32 trig_status_bitmap = | |
269 | le32_to_cpu(te_trig->time_events[i].status_bitmap); | |
270 | ||
271 | if (trig_te_id != te_data->id || | |
272 | !(trig_action_bitmap & le32_to_cpu(notif->action)) || | |
273 | !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) | |
274 | continue; | |
275 | ||
7174beb6 JB |
276 | iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, |
277 | "Time event %d Action 0x%x received status: %d", | |
278 | te_data->id, | |
279 | le32_to_cpu(notif->action), | |
280 | le32_to_cpu(notif->status)); | |
874c174e EG |
281 | break; |
282 | } | |
283 | } | |
284 | ||
8ca151b5 JB |
285 | /* |
286 | * Handles a FW notification for an event that is known to the driver. | |
287 | * | |
288 | * @mvm: the mvm component | |
289 | * @te_data: the time event data | |
290 | * @notif: the notification data corresponding the time event data. | |
291 | */ | |
292 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
293 | struct iwl_mvm_time_event_data *te_data, | |
294 | struct iwl_time_event_notif *notif) | |
295 | { | |
296 | lockdep_assert_held(&mvm->time_event_lock); | |
297 | ||
298 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
299 | le32_to_cpu(notif->unique_id), | |
300 | le32_to_cpu(notif->action)); | |
301 | ||
874c174e EG |
302 | iwl_mvm_te_check_trigger(mvm, notif, te_data); |
303 | ||
8ca151b5 JB |
304 | /* |
305 | * The FW sends the start/end time event notifications even for events | |
306 | * that it fails to schedule. This is indicated in the status field of | |
307 | * the notification. This happens in cases that the scheduler cannot | |
308 | * find a schedule that can handle the event (for example requesting a | |
309 | * P2P Device discoveribility, while there are other higher priority | |
310 | * events in the system). | |
311 | */ | |
9fc3fe96 | 312 | if (!le32_to_cpu(notif->status)) { |
bcd535eb JB |
313 | const char *msg; |
314 | ||
315 | if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) | |
316 | msg = "Time Event start notification failure"; | |
317 | else | |
318 | msg = "Time Event end notification failure"; | |
319 | ||
320 | IWL_DEBUG_TE(mvm, "%s\n", msg); | |
321 | ||
322 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { | |
05739794 JB |
323 | iwl_mvm_te_clear_data(mvm, te_data); |
324 | return; | |
325 | } | |
326 | } | |
8ca151b5 | 327 | |
f8f03c3e | 328 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
329 | IWL_DEBUG_TE(mvm, |
330 | "TE ended - current time %lu, estimated end %lu\n", | |
331 | jiffies, te_data->end_jiffies); | |
332 | ||
bca13904 JB |
333 | switch (te_data->vif->type) { |
334 | case NL80211_IFTYPE_P2P_DEVICE: | |
8ca151b5 | 335 | ieee80211_remain_on_channel_expired(mvm->hw); |
4f1e85f0 | 336 | set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status); |
8ca151b5 | 337 | iwl_mvm_roc_finished(mvm); |
bca13904 JB |
338 | break; |
339 | case NL80211_IFTYPE_STATION: | |
340 | /* | |
341 | * By now, we should have finished association | |
342 | * and know the dtim period. | |
343 | */ | |
344 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, | |
19125cb0 | 345 | "No beacon heard and the time event is over already..."); |
bca13904 JB |
346 | break; |
347 | default: | |
348 | break; | |
8ca151b5 JB |
349 | } |
350 | ||
8ca151b5 | 351 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 352 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 353 | te_data->running = true; |
e7f1935c | 354 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
355 | |
356 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
357 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
358 | ieee80211_ready_on_channel(mvm->hw); | |
dc88b4ba LC |
359 | } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { |
360 | iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); | |
8ca151b5 JB |
361 | } |
362 | } else { | |
363 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
364 | } | |
365 | } | |
366 | ||
b112889c AM |
367 | /* |
368 | * Handle A Aux ROC time event | |
369 | */ | |
370 | static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, | |
371 | struct iwl_time_event_notif *notif) | |
372 | { | |
373 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
374 | bool aux_roc_te = false; | |
375 | ||
376 | list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { | |
377 | if (le32_to_cpu(notif->unique_id) == te_data->uid) { | |
378 | aux_roc_te = true; | |
379 | break; | |
380 | } | |
381 | } | |
382 | if (!aux_roc_te) /* Not a Aux ROC time event */ | |
383 | return -EINVAL; | |
384 | ||
874c174e EG |
385 | iwl_mvm_te_check_trigger(mvm, notif, te_data); |
386 | ||
b112889c | 387 | IWL_DEBUG_TE(mvm, |
5151ad95 | 388 | "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n", |
b112889c | 389 | le32_to_cpu(notif->unique_id), |
5151ad95 | 390 | le32_to_cpu(notif->action), le32_to_cpu(notif->status)); |
b112889c | 391 | |
5151ad95 MG |
392 | if (!le32_to_cpu(notif->status) || |
393 | le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { | |
b112889c AM |
394 | /* End TE, notify mac80211 */ |
395 | ieee80211_remain_on_channel_expired(mvm->hw); | |
396 | iwl_mvm_roc_finished(mvm); /* flush aux queue */ | |
397 | list_del(&te_data->list); /* remove from list */ | |
398 | te_data->running = false; | |
399 | te_data->vif = NULL; | |
400 | te_data->uid = 0; | |
a6cc5163 | 401 | te_data->id = TE_MAX; |
b112889c | 402 | } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { |
b112889c AM |
403 | set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); |
404 | te_data->running = true; | |
405 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ | |
406 | } else { | |
407 | IWL_DEBUG_TE(mvm, | |
408 | "ERROR: Unknown Aux ROC Time Event (action = %d)\n", | |
409 | le32_to_cpu(notif->action)); | |
410 | return -EINVAL; | |
411 | } | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
8ca151b5 JB |
416 | /* |
417 | * The Rx handler for time event notifications | |
418 | */ | |
0416841d JB |
419 | void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, |
420 | struct iwl_rx_cmd_buffer *rxb) | |
8ca151b5 JB |
421 | { |
422 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
423 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
424 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
425 | ||
426 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
427 | le32_to_cpu(notif->unique_id), | |
428 | le32_to_cpu(notif->action)); | |
429 | ||
430 | spin_lock_bh(&mvm->time_event_lock); | |
b112889c AM |
431 | /* This time event is triggered for Aux ROC request */ |
432 | if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) | |
433 | goto unlock; | |
434 | ||
8ca151b5 JB |
435 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { |
436 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
437 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
438 | } | |
b112889c | 439 | unlock: |
8ca151b5 | 440 | spin_unlock_bh(&mvm->time_event_lock); |
8ca151b5 JB |
441 | } |
442 | ||
d20d37bc LK |
443 | static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, |
444 | struct iwl_rx_packet *pkt, void *data) | |
445 | { | |
446 | struct iwl_mvm *mvm = | |
447 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
448 | struct iwl_mvm_time_event_data *te_data = data; | |
449 | struct iwl_time_event_notif *resp; | |
450 | int resp_len = iwl_rx_packet_payload_len(pkt); | |
451 | ||
452 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) | |
453 | return true; | |
454 | ||
455 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { | |
456 | IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); | |
457 | return true; | |
458 | } | |
459 | ||
460 | resp = (void *)pkt->data; | |
461 | ||
462 | /* te_data->uid is already set in the TIME_EVENT_CMD response */ | |
463 | if (le32_to_cpu(resp->unique_id) != te_data->uid) | |
464 | return false; | |
465 | ||
466 | IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", | |
467 | te_data->uid); | |
468 | if (!resp->status) | |
469 | IWL_ERR(mvm, | |
470 | "TIME_EVENT_NOTIFICATION received but not executed\n"); | |
471 | ||
472 | return true; | |
473 | } | |
474 | ||
ffdf968d JB |
475 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
476 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
477 | { |
478 | struct iwl_mvm *mvm = | |
479 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
480 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 481 | struct iwl_time_event_resp *resp; |
65b30348 | 482 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 483 | |
ffdf968d JB |
484 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
485 | return true; | |
8ca151b5 | 486 | |
65b30348 | 487 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
488 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
489 | return true; | |
490 | } | |
8ca151b5 | 491 | |
ffdf968d | 492 | resp = (void *)pkt->data; |
e3722822 JB |
493 | |
494 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
495 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
496 | return false; | |
497 | ||
ffdf968d JB |
498 | te_data->uid = le32_to_cpu(resp->unique_id); |
499 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
500 | te_data->uid); | |
501 | return true; | |
502 | } | |
8ca151b5 | 503 | |
ffdf968d JB |
504 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
505 | struct ieee80211_vif *vif, | |
506 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 507 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d | 508 | { |
6eb031d2 | 509 | static const u16 time_event_response[] = { TIME_EVENT_CMD }; |
ffdf968d JB |
510 | struct iwl_notification_wait wait_time_event; |
511 | int ret; | |
512 | ||
513 | lockdep_assert_held(&mvm->mutex); | |
514 | ||
93630dc3 JB |
515 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
516 | le32_to_cpu(te_cmd->duration)); | |
517 | ||
ffdf968d JB |
518 | spin_lock_bh(&mvm->time_event_lock); |
519 | if (WARN_ON(te_data->id != TE_MAX)) { | |
520 | spin_unlock_bh(&mvm->time_event_lock); | |
521 | return -EIO; | |
522 | } | |
523 | te_data->vif = vif; | |
524 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
525 | te_data->id = le32_to_cpu(te_cmd->id); | |
526 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
527 | spin_unlock_bh(&mvm->time_event_lock); | |
528 | ||
529 | /* | |
530 | * Use a notification wait, which really just processes the | |
531 | * command response and doesn't wait for anything, in order | |
532 | * to be able to process the response and get the UID inside | |
533 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
534 | * stores the buffer and then wakes up this thread, by which | |
535 | * time another notification (that the time event started) | |
536 | * might already be processed unsuccessfully. | |
537 | */ | |
538 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
539 | time_event_response, | |
540 | ARRAY_SIZE(time_event_response), | |
541 | iwl_mvm_time_event_response, te_data); | |
542 | ||
a1022927 | 543 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 544 | sizeof(*te_cmd), te_cmd); |
ffdf968d JB |
545 | if (ret) { |
546 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
547 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
548 | goto out_clear_te; | |
549 | } | |
8ca151b5 | 550 | |
ffdf968d JB |
551 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
552 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
553 | /* should never fail */ | |
554 | WARN_ON_ONCE(ret); | |
555 | ||
556 | if (ret) { | |
557 | out_clear_te: | |
558 | spin_lock_bh(&mvm->time_event_lock); | |
559 | iwl_mvm_te_clear_data(mvm, te_data); | |
560 | spin_unlock_bh(&mvm->time_event_lock); | |
561 | } | |
562 | return ret; | |
8ca151b5 JB |
563 | } |
564 | ||
565 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
566 | struct ieee80211_vif *vif, | |
016d27e1 | 567 | u32 duration, u32 min_duration, |
d20d37bc | 568 | u32 max_delay, bool wait_for_notif) |
8ca151b5 JB |
569 | { |
570 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
571 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
6eb031d2 | 572 | const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; |
d20d37bc | 573 | struct iwl_notification_wait wait_te_notif; |
a373f67c | 574 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
575 | |
576 | lockdep_assert_held(&mvm->mutex); | |
577 | ||
578 | if (te_data->running && | |
e7f1935c | 579 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
580 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
581 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
582 | return; | |
583 | } | |
584 | ||
585 | if (te_data->running) { | |
586 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
587 | te_data->uid, | |
588 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
589 | /* | |
590 | * we don't have enough time | |
591 | * cancel the current TE and issue a new one | |
592 | * Of course it would be better to remove the old one only | |
593 | * when the new one is added, but we don't care if we are off | |
594 | * channel for a bit. All we need to do, is not to return | |
595 | * before we actually begin to be on the channel. | |
596 | */ | |
597 | iwl_mvm_stop_session_protection(mvm, vif); | |
598 | } | |
599 | ||
8ca151b5 JB |
600 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
601 | time_cmd.id_and_color = | |
602 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
603 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
604 | ||
5bf12f60 | 605 | time_cmd.apply_time = cpu_to_le32(0); |
ffdf968d | 606 | |
f8f03c3e | 607 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 608 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
609 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
610 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 611 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
612 | time_cmd.repeat = 1; |
613 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 | 614 | TE_V2_NOTIF_HOST_EVENT_END | |
40d53f4a | 615 | TE_V2_START_IMMEDIATELY); |
8ca151b5 | 616 | |
d20d37bc LK |
617 | if (!wait_for_notif) { |
618 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
619 | return; | |
620 | } | |
621 | ||
622 | /* | |
623 | * Create notification_wait for the TIME_EVENT_NOTIFICATION to use | |
624 | * right after we send the time event | |
625 | */ | |
626 | iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, | |
627 | te_notif_response, | |
628 | ARRAY_SIZE(te_notif_response), | |
629 | iwl_mvm_te_notif, te_data); | |
630 | ||
631 | /* If TE was sent OK - wait for the notification that started */ | |
632 | if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { | |
633 | IWL_ERR(mvm, "Failed to add TE to protect session\n"); | |
634 | iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); | |
635 | } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, | |
636 | TU_TO_JIFFIES(max_delay))) { | |
637 | IWL_ERR(mvm, "Failed to protect session until TE\n"); | |
638 | } | |
8ca151b5 JB |
639 | } |
640 | ||
bf5da87f MG |
641 | static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
642 | struct iwl_mvm_time_event_data *te_data, | |
643 | u32 *uid) | |
8ca151b5 | 644 | { |
bf5da87f | 645 | u32 id; |
8ca151b5 JB |
646 | |
647 | /* | |
648 | * It is possible that by the time we got to this point the time | |
649 | * event was already removed. | |
650 | */ | |
651 | spin_lock_bh(&mvm->time_event_lock); | |
652 | ||
653 | /* Save time event uid before clearing its data */ | |
bf5da87f | 654 | *uid = te_data->uid; |
8ca151b5 JB |
655 | id = te_data->id; |
656 | ||
657 | /* | |
658 | * The clear_data function handles time events that were already removed | |
659 | */ | |
660 | iwl_mvm_te_clear_data(mvm, te_data); | |
661 | spin_unlock_bh(&mvm->time_event_lock); | |
662 | ||
663 | /* | |
664 | * It is possible that by the time we try to remove it, the time event | |
665 | * has already ended and removed. In such a case there is no need to | |
666 | * send a removal command. | |
667 | */ | |
668 | if (id == TE_MAX) { | |
bf5da87f MG |
669 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); |
670 | return false; | |
8ca151b5 JB |
671 | } |
672 | ||
bf5da87f MG |
673 | return true; |
674 | } | |
675 | ||
676 | /* | |
677 | * Explicit request to remove a aux roc time event. The removal of a time | |
678 | * event needs to be synchronized with the flow of a time event's end | |
679 | * notification, which also removes the time event from the op mode | |
680 | * data structures. | |
681 | */ | |
682 | static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, | |
683 | struct iwl_mvm_vif *mvmvif, | |
684 | struct iwl_mvm_time_event_data *te_data) | |
685 | { | |
686 | struct iwl_hs20_roc_req aux_cmd = {}; | |
57e861d9 DS |
687 | u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm); |
688 | ||
bf5da87f MG |
689 | u32 uid; |
690 | int ret; | |
691 | ||
692 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
693 | return; | |
694 | ||
695 | aux_cmd.event_unique_id = cpu_to_le32(uid); | |
696 | aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
697 | aux_cmd.id_and_color = | |
698 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
699 | IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", | |
700 | le32_to_cpu(aux_cmd.event_unique_id)); | |
701 | ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, | |
57e861d9 | 702 | len, &aux_cmd); |
bf5da87f MG |
703 | |
704 | if (WARN_ON(ret)) | |
705 | return; | |
706 | } | |
707 | ||
708 | /* | |
709 | * Explicit request to remove a time event. The removal of a time event needs to | |
710 | * be synchronized with the flow of a time event's end notification, which also | |
711 | * removes the time event from the op mode data structures. | |
712 | */ | |
713 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
714 | struct iwl_mvm_vif *mvmvif, | |
715 | struct iwl_mvm_time_event_data *te_data) | |
716 | { | |
717 | struct iwl_time_event_cmd time_cmd = {}; | |
718 | u32 uid; | |
719 | int ret; | |
720 | ||
721 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
722 | return; | |
723 | ||
8ca151b5 JB |
724 | /* When we remove a TE, the UID is to be set in the id field */ |
725 | time_cmd.id = cpu_to_le32(uid); | |
726 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
727 | time_cmd.id_and_color = | |
728 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
729 | ||
730 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a1022927 | 731 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 732 | sizeof(time_cmd), &time_cmd); |
8ca151b5 JB |
733 | if (WARN_ON(ret)) |
734 | return; | |
735 | } | |
736 | ||
fe959c7b EG |
737 | /* |
738 | * When the firmware supports the session protection API, | |
739 | * this is not needed since it'll automatically remove the | |
740 | * session protection after association + beacon reception. | |
741 | */ | |
8ca151b5 JB |
742 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, |
743 | struct ieee80211_vif *vif) | |
744 | { | |
745 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
746 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
3edfb5f4 | 747 | u32 id; |
8ca151b5 JB |
748 | |
749 | lockdep_assert_held(&mvm->mutex); | |
3edfb5f4 AS |
750 | |
751 | spin_lock_bh(&mvm->time_event_lock); | |
752 | id = te_data->id; | |
753 | spin_unlock_bh(&mvm->time_event_lock); | |
754 | ||
755 | if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) { | |
756 | IWL_DEBUG_TE(mvm, | |
757 | "don't remove TE with id=%u (not session protection)\n", | |
758 | id); | |
759 | return; | |
760 | } | |
761 | ||
8ca151b5 JB |
762 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); |
763 | } | |
764 | ||
fe959c7b EG |
765 | void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm, |
766 | struct iwl_rx_cmd_buffer *rxb) | |
767 | { | |
768 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
769 | struct iwl_mvm_session_prot_notif *notif = (void *)pkt->data; | |
770 | struct ieee80211_vif *vif; | |
771 | ||
772 | rcu_read_lock(); | |
773 | vif = iwl_mvm_rcu_dereference_vif_id(mvm, le32_to_cpu(notif->mac_id), | |
774 | true); | |
775 | ||
776 | if (!vif) | |
777 | goto out_unlock; | |
778 | ||
779 | /* The vif is not a P2P_DEVICE, maintain its time_event_data */ | |
780 | if (vif->type != NL80211_IFTYPE_P2P_DEVICE) { | |
781 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
782 | struct iwl_mvm_time_event_data *te_data = | |
783 | &mvmvif->time_event_data; | |
784 | ||
785 | if (!le32_to_cpu(notif->status)) { | |
786 | iwl_mvm_te_check_disconnect(mvm, vif, | |
787 | "Session protection failure"); | |
089e5016 | 788 | spin_lock_bh(&mvm->time_event_lock); |
fe959c7b | 789 | iwl_mvm_te_clear_data(mvm, te_data); |
089e5016 | 790 | spin_unlock_bh(&mvm->time_event_lock); |
fe959c7b EG |
791 | } |
792 | ||
793 | if (le32_to_cpu(notif->start)) { | |
794 | spin_lock_bh(&mvm->time_event_lock); | |
795 | te_data->running = le32_to_cpu(notif->start); | |
796 | te_data->end_jiffies = | |
797 | TU_TO_EXP_TIME(te_data->duration); | |
798 | spin_unlock_bh(&mvm->time_event_lock); | |
799 | } else { | |
800 | /* | |
801 | * By now, we should have finished association | |
802 | * and know the dtim period. | |
803 | */ | |
804 | iwl_mvm_te_check_disconnect(mvm, vif, | |
805 | "No beacon heard and the session protection is over already..."); | |
089e5016 | 806 | spin_lock_bh(&mvm->time_event_lock); |
fe959c7b | 807 | iwl_mvm_te_clear_data(mvm, te_data); |
089e5016 | 808 | spin_unlock_bh(&mvm->time_event_lock); |
fe959c7b EG |
809 | } |
810 | ||
811 | goto out_unlock; | |
812 | } | |
813 | ||
814 | if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) { | |
815 | /* End TE, notify mac80211 */ | |
816 | ieee80211_remain_on_channel_expired(mvm->hw); | |
817 | set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status); | |
818 | iwl_mvm_roc_finished(mvm); | |
819 | } else if (le32_to_cpu(notif->start)) { | |
820 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
821 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ | |
822 | } | |
823 | ||
824 | out_unlock: | |
825 | rcu_read_unlock(); | |
826 | } | |
827 | ||
828 | static int | |
829 | iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm, | |
830 | struct ieee80211_vif *vif, | |
831 | int duration, | |
832 | enum ieee80211_roc_type type) | |
833 | { | |
834 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
835 | struct iwl_mvm_session_prot_cmd cmd = { | |
836 | .id_and_color = | |
837 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, | |
838 | mvmvif->color)), | |
839 | .action = cpu_to_le32(FW_CTXT_ACTION_ADD), | |
840 | .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)), | |
841 | }; | |
842 | ||
843 | lockdep_assert_held(&mvm->mutex); | |
844 | ||
845 | switch (type) { | |
846 | case IEEE80211_ROC_TYPE_NORMAL: | |
847 | cmd.conf_id = | |
848 | cpu_to_le32(SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV); | |
849 | break; | |
850 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
851 | cmd.conf_id = | |
852 | cpu_to_le32(SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION); | |
853 | break; | |
854 | default: | |
855 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
856 | return -EINVAL; | |
857 | } | |
858 | ||
859 | return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(SESSION_PROTECTION_CMD, | |
860 | MAC_CONF_GROUP, 0), | |
861 | 0, sizeof(cmd), &cmd); | |
862 | } | |
863 | ||
8ca151b5 | 864 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 865 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
866 | { |
867 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
868 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 869 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
870 | |
871 | lockdep_assert_held(&mvm->mutex); | |
872 | if (te_data->running) { | |
873 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
874 | return -EBUSY; | |
875 | } | |
876 | ||
fe959c7b EG |
877 | if (fw_has_capa(&mvm->fw->ucode_capa, |
878 | IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) | |
879 | return iwl_mvm_start_p2p_roc_session_protection(mvm, vif, | |
880 | duration, | |
881 | type); | |
882 | ||
8ca151b5 JB |
883 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
884 | time_cmd.id_and_color = | |
885 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
886 | |
887 | switch (type) { | |
888 | case IEEE80211_ROC_TYPE_NORMAL: | |
889 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
890 | break; | |
891 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
892 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
893 | break; | |
894 | default: | |
895 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
896 | return -EINVAL; | |
897 | } | |
8ca151b5 JB |
898 | |
899 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
900 | time_cmd.interval = cpu_to_le32(1); |
901 | ||
902 | /* | |
e635c797 | 903 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 904 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
905 | * scheduled. To improve the chances of it being scheduled, allow them |
906 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 907 | */ |
f8f03c3e | 908 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
909 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
910 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
911 | time_cmd.repeat = 1; |
912 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 | 913 | TE_V2_NOTIF_HOST_EVENT_END | |
40d53f4a | 914 | TE_V2_START_IMMEDIATELY); |
8ca151b5 | 915 | |
ffdf968d | 916 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
917 | } |
918 | ||
305d236e | 919 | static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm) |
8ca151b5 | 920 | { |
8ca151b5 JB |
921 | struct iwl_mvm_time_event_data *te_data; |
922 | ||
923 | lockdep_assert_held(&mvm->mutex); | |
924 | ||
bf5da87f MG |
925 | spin_lock_bh(&mvm->time_event_lock); |
926 | ||
8ca151b5 JB |
927 | /* |
928 | * Iterate over the list of time events and find the time event that is | |
929 | * associated with a P2P_DEVICE interface. | |
930 | * This assumes that a P2P_DEVICE interface can have only a single time | |
931 | * event at any given time and this time event coresponds to a ROC | |
932 | * request | |
933 | */ | |
8ca151b5 | 934 | list_for_each_entry(te_data, &mvm->time_event_list, list) { |
305d236e EP |
935 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) |
936 | goto out; | |
bf5da87f MG |
937 | } |
938 | ||
ebf17ff9 JB |
939 | /* There can only be at most one AUX ROC time event, we just use the |
940 | * list to simplify/unify code. Remove it if it exists. | |
bf5da87f | 941 | */ |
ebf17ff9 JB |
942 | te_data = list_first_entry_or_null(&mvm->aux_roc_te_list, |
943 | struct iwl_mvm_time_event_data, | |
944 | list); | |
305d236e EP |
945 | out: |
946 | spin_unlock_bh(&mvm->time_event_lock); | |
947 | return te_data; | |
948 | } | |
949 | ||
950 | void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm) | |
951 | { | |
952 | struct iwl_mvm_time_event_data *te_data; | |
953 | u32 uid; | |
954 | ||
955 | te_data = iwl_mvm_get_roc_te(mvm); | |
ebf17ff9 | 956 | if (te_data) |
305d236e EP |
957 | __iwl_mvm_remove_time_event(mvm, te_data, &uid); |
958 | } | |
bf5da87f | 959 | |
fe959c7b EG |
960 | static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm, |
961 | struct iwl_mvm_vif *mvmvif) | |
962 | { | |
963 | struct iwl_mvm_session_prot_cmd cmd = { | |
964 | .id_and_color = | |
965 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, | |
966 | mvmvif->color)), | |
967 | .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE), | |
968 | }; | |
969 | int ret; | |
970 | ||
971 | ret = iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(SESSION_PROTECTION_CMD, | |
972 | MAC_CONF_GROUP, 0), | |
973 | 0, sizeof(cmd), &cmd); | |
974 | if (ret) | |
975 | IWL_ERR(mvm, | |
976 | "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret); | |
977 | } | |
978 | ||
979 | void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
305d236e EP |
980 | { |
981 | struct iwl_mvm_vif *mvmvif; | |
982 | struct iwl_mvm_time_event_data *te_data; | |
8ca151b5 | 983 | |
fe959c7b EG |
984 | if (fw_has_capa(&mvm->fw->ucode_capa, |
985 | IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) { | |
986 | mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
987 | ||
988 | iwl_mvm_cancel_session_protection(mvm, mvmvif); | |
989 | ||
990 | if (vif->type == NL80211_IFTYPE_P2P_DEVICE) | |
991 | set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status); | |
992 | ||
993 | iwl_mvm_roc_finished(mvm); | |
994 | ||
995 | return; | |
996 | } | |
997 | ||
305d236e EP |
998 | te_data = iwl_mvm_get_roc_te(mvm); |
999 | if (!te_data) { | |
bf5da87f | 1000 | IWL_WARN(mvm, "No remain on channel event\n"); |
8ca151b5 JB |
1001 | return; |
1002 | } | |
1003 | ||
305d236e EP |
1004 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
1005 | ||
6c2d49fd | 1006 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
bf5da87f | 1007 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); |
6c2d49fd JB |
1008 | set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status); |
1009 | } else { | |
bf5da87f | 1010 | iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); |
6c2d49fd | 1011 | } |
8ca151b5 JB |
1012 | |
1013 | iwl_mvm_roc_finished(mvm); | |
1014 | } | |
7f0a7c67 | 1015 | |
f991e17b LC |
1016 | int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
1017 | struct ieee80211_vif *vif, | |
1018 | u32 duration, u32 apply_time) | |
7f0a7c67 AO |
1019 | { |
1020 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1021 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
1022 | struct iwl_time_event_cmd time_cmd = {}; | |
1023 | ||
1024 | lockdep_assert_held(&mvm->mutex); | |
1025 | ||
1026 | if (te_data->running) { | |
3edfb5f4 AS |
1027 | u32 id; |
1028 | ||
1029 | spin_lock_bh(&mvm->time_event_lock); | |
1030 | id = te_data->id; | |
1031 | spin_unlock_bh(&mvm->time_event_lock); | |
1032 | ||
1033 | if (id == TE_CHANNEL_SWITCH_PERIOD) { | |
1034 | IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); | |
1035 | return -EBUSY; | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * Remove the session protection time event to allow the | |
1040 | * channel switch. If we got here, we just heard a beacon so | |
1041 | * the session protection is not needed anymore anyway. | |
1042 | */ | |
1043 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
7f0a7c67 AO |
1044 | } |
1045 | ||
1046 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); | |
1047 | time_cmd.id_and_color = | |
1048 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
f991e17b | 1049 | time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); |
7f0a7c67 AO |
1050 | time_cmd.apply_time = cpu_to_le32(apply_time); |
1051 | time_cmd.max_frags = TE_V2_FRAG_NONE; | |
1052 | time_cmd.duration = cpu_to_le32(duration); | |
1053 | time_cmd.repeat = 1; | |
1054 | time_cmd.interval = cpu_to_le32(1); | |
1055 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1056 | TE_V2_ABSENCE); | |
40d53f4a AO |
1057 | if (!apply_time) |
1058 | time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY); | |
7f0a7c67 AO |
1059 | |
1060 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
1061 | } | |
fe959c7b | 1062 | |
b5b878e3 EG |
1063 | static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait, |
1064 | struct iwl_rx_packet *pkt, void *data) | |
1065 | { | |
1066 | struct iwl_mvm *mvm = | |
1067 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
1068 | struct iwl_mvm_session_prot_notif *resp; | |
1069 | int resp_len = iwl_rx_packet_payload_len(pkt); | |
1070 | ||
1071 | if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF || | |
1072 | pkt->hdr.group_id != MAC_CONF_GROUP)) | |
1073 | return true; | |
1074 | ||
1075 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { | |
1076 | IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n"); | |
1077 | return true; | |
1078 | } | |
1079 | ||
1080 | resp = (void *)pkt->data; | |
1081 | ||
1082 | if (!resp->status) | |
1083 | IWL_ERR(mvm, | |
1084 | "TIME_EVENT_NOTIFICATION received but not executed\n"); | |
1085 | ||
1086 | return true; | |
1087 | } | |
1088 | ||
fe959c7b EG |
1089 | void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm, |
1090 | struct ieee80211_vif *vif, | |
b5b878e3 EG |
1091 | u32 duration, u32 min_duration, |
1092 | bool wait_for_notif) | |
fe959c7b EG |
1093 | { |
1094 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1095 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
b5b878e3 EG |
1096 | const u16 notif[] = { iwl_cmd_id(SESSION_PROTECTION_NOTIF, |
1097 | MAC_CONF_GROUP, 0) }; | |
1098 | struct iwl_notification_wait wait_notif; | |
fe959c7b EG |
1099 | struct iwl_mvm_session_prot_cmd cmd = { |
1100 | .id_and_color = | |
1101 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, | |
1102 | mvmvif->color)), | |
1103 | .action = cpu_to_le32(FW_CTXT_ACTION_ADD), | |
1104 | .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC), | |
1105 | .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)), | |
1106 | }; | |
fe959c7b EG |
1107 | |
1108 | lockdep_assert_held(&mvm->mutex); | |
1109 | ||
1110 | spin_lock_bh(&mvm->time_event_lock); | |
1111 | if (te_data->running && | |
1112 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { | |
1113 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", | |
1114 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
1115 | spin_unlock_bh(&mvm->time_event_lock); | |
1116 | ||
1117 | return; | |
1118 | } | |
1119 | ||
1120 | iwl_mvm_te_clear_data(mvm, te_data); | |
1121 | te_data->duration = le32_to_cpu(cmd.duration_tu); | |
1122 | spin_unlock_bh(&mvm->time_event_lock); | |
1123 | ||
1124 | IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n", | |
1125 | le32_to_cpu(cmd.duration_tu)); | |
1126 | ||
b5b878e3 EG |
1127 | if (!wait_for_notif) { |
1128 | if (iwl_mvm_send_cmd_pdu(mvm, | |
1129 | iwl_cmd_id(SESSION_PROTECTION_CMD, | |
1130 | MAC_CONF_GROUP, 0), | |
1131 | 0, sizeof(cmd), &cmd)) { | |
1132 | IWL_ERR(mvm, | |
1133 | "Couldn't send the SESSION_PROTECTION_CMD\n"); | |
1134 | spin_lock_bh(&mvm->time_event_lock); | |
1135 | iwl_mvm_te_clear_data(mvm, te_data); | |
1136 | spin_unlock_bh(&mvm->time_event_lock); | |
1137 | } | |
1138 | ||
1139 | return; | |
1140 | } | |
1141 | ||
1142 | iwl_init_notification_wait(&mvm->notif_wait, &wait_notif, | |
1143 | notif, ARRAY_SIZE(notif), | |
1144 | iwl_mvm_session_prot_notif, NULL); | |
1145 | ||
1146 | if (iwl_mvm_send_cmd_pdu(mvm, | |
1147 | iwl_cmd_id(SESSION_PROTECTION_CMD, | |
1148 | MAC_CONF_GROUP, 0), | |
1149 | 0, sizeof(cmd), &cmd)) { | |
fe959c7b | 1150 | IWL_ERR(mvm, |
b5b878e3 EG |
1151 | "Couldn't send the SESSION_PROTECTION_CMD\n"); |
1152 | iwl_remove_notification(&mvm->notif_wait, &wait_notif); | |
1153 | } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif, | |
1154 | TU_TO_JIFFIES(100))) { | |
1155 | IWL_ERR(mvm, | |
1156 | "Failed to protect session until session protection\n"); | |
fe959c7b EG |
1157 | } |
1158 | } |