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sys/contrib/dev/iwlwifi/mvm/time-event.c
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1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2017 Intel Deutschland GmbH 6 */ 7 #include <linux/jiffies.h> 8 #include <net/mac80211.h> 9 10 #include "fw/notif-wait.h" 11 #include "iwl-trans.h" 12 #include "fw-api.h" 13 #include "time-event.h" 14 #include "mvm.h" 15 #include "iwl-io.h" 16 #include "iwl-prph.h" 17 18 /* 19 * For the high priority TE use a time event type that has similar priority to 20 * the FW's action scan priority. 21 */ 22 #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE 23 #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC 24 25 void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, 26 struct iwl_mvm_time_event_data *te_data) 27 { 28 lockdep_assert_held(&mvm->time_event_lock); 29 30 if (!te_data || !te_data->vif) 31 return; 32 33 list_del(&te_data->list); 34 35 /* 36 * the list is only used for AUX ROC events so make sure it is always 37 * initialized 38 */ 39 INIT_LIST_HEAD(&te_data->list); 40 41 te_data->running = false; 42 te_data->uid = 0; 43 te_data->id = TE_MAX; 44 te_data->vif = NULL; 45 } 46 47 void iwl_mvm_roc_done_wk(struct work_struct *wk) 48 { 49 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); 50 51 /* 52 * Clear the ROC_RUNNING status bit. 53 * This will cause the TX path to drop offchannel transmissions. 54 * That would also be done by mac80211, but it is racy, in particular 55 * in the case that the time event actually completed in the firmware 56 * (which is handled in iwl_mvm_te_handle_notif). 57 */ 58 clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); 59 60 synchronize_net(); 61 62 /* 63 * Flush the offchannel queue -- this is called when the time 64 * event finishes or is canceled, so that frames queued for it 65 * won't get stuck on the queue and be transmitted in the next 66 * time event. 67 */ 68 69 mutex_lock(&mvm->mutex); 70 if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) { 71 struct iwl_mvm_vif *mvmvif; 72 73 /* 74 * NB: access to this pointer would be racy, but the flush bit 75 * can only be set when we had a P2P-Device VIF, and we have a 76 * flush of this work in iwl_mvm_prepare_mac_removal() so it's 77 * not really racy. 78 */ 79 80 if (!WARN_ON(!mvm->p2p_device_vif)) { 81 mvmvif = iwl_mvm_vif_from_mac80211(mvm->p2p_device_vif); 82 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true); 83 } 84 } 85 86 /* 87 * Clear the ROC_AUX_RUNNING status bit. 88 * This will cause the TX path to drop offchannel transmissions. 89 * That would also be done by mac80211, but it is racy, in particular 90 * in the case that the time event actually completed in the firmware 91 * (which is handled in iwl_mvm_te_handle_notif). 92 */ 93 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) { 94 /* do the same in case of hot spot 2.0 */ 95 iwl_mvm_flush_sta(mvm, &mvm->aux_sta, true); 96 97 /* In newer version of this command an aux station is added only 98 * in cases of dedicated tx queue and need to be removed in end 99 * of use */ 100 if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12) 101 iwl_mvm_rm_aux_sta(mvm); 102 } 103 104 mutex_unlock(&mvm->mutex); 105 } 106 107 static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) 108 { 109 /* 110 * Of course, our status bit is just as racy as mac80211, so in 111 * addition, fire off the work struct which will drop all frames 112 * from the hardware queues that made it through the race. First 113 * it will of course synchronize the TX path to make sure that 114 * any *new* TX will be rejected. 115 */ 116 schedule_work(&mvm->roc_done_wk); 117 } 118 119 static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) 120 { 121 struct ieee80211_vif *csa_vif; 122 123 rcu_read_lock(); 124 125 csa_vif = rcu_dereference(mvm->csa_vif); 126 if (!csa_vif || !csa_vif->csa_active) 127 goto out_unlock; 128 129 IWL_DEBUG_TE(mvm, "CSA NOA started\n"); 130 131 /* 132 * CSA NoA is started but we still have beacons to 133 * transmit on the current channel. 134 * So we just do nothing here and the switch 135 * will be performed on the last TBTT. 136 */ 137 if (!ieee80211_beacon_cntdwn_is_complete(csa_vif)) { 138 IWL_WARN(mvm, "CSA NOA started too early\n"); 139 goto out_unlock; 140 } 141 142 ieee80211_csa_finish(csa_vif); 143 144 rcu_read_unlock(); 145 146 RCU_INIT_POINTER(mvm->csa_vif, NULL); 147 148 return; 149 150 out_unlock: 151 rcu_read_unlock(); 152 } 153 154 static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, 155 struct ieee80211_vif *vif, 156 const char *errmsg) 157 { 158 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 159 160 if (vif->type != NL80211_IFTYPE_STATION) 161 return false; 162 163 if (!mvmvif->csa_bcn_pending && vif->bss_conf.assoc && 164 vif->bss_conf.dtim_period) 165 return false; 166 if (errmsg) 167 IWL_ERR(mvm, "%s\n", errmsg); 168 169 if (mvmvif->csa_bcn_pending) { 170 struct iwl_mvm_sta *mvmsta; 171 172 rcu_read_lock(); 173 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 174 if (!WARN_ON(!mvmsta)) 175 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false); 176 rcu_read_unlock(); 177 } 178 179 if (vif->bss_conf.assoc) { 180 /* 181 * When not associated, this will be called from 182 * iwl_mvm_event_mlme_callback_ini() 183 */ 184 iwl_dbg_tlv_time_point(&mvm->fwrt, 185 IWL_FW_INI_TIME_POINT_ASSOC_FAILED, 186 NULL); 187 } 188 189 iwl_mvm_connection_loss(mvm, vif, errmsg); 190 return true; 191 } 192 193 static void 194 iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, 195 struct iwl_mvm_time_event_data *te_data, 196 struct iwl_time_event_notif *notif) 197 { 198 struct ieee80211_vif *vif = te_data->vif; 199 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 200 201 if (!notif->status) 202 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); 203 204 switch (te_data->vif->type) { 205 case NL80211_IFTYPE_AP: 206 if (!notif->status) 207 mvmvif->csa_failed = true; 208 iwl_mvm_csa_noa_start(mvm); 209 break; 210 case NL80211_IFTYPE_STATION: 211 if (!notif->status) { 212 iwl_mvm_connection_loss(mvm, vif, 213 "CSA TE failed to start"); 214 break; 215 } 216 iwl_mvm_csa_client_absent(mvm, te_data->vif); 217 cancel_delayed_work(&mvmvif->csa_work); 218 ieee80211_chswitch_done(te_data->vif, true); 219 break; 220 default: 221 /* should never happen */ 222 WARN_ON_ONCE(1); 223 break; 224 } 225 226 /* we don't need it anymore */ 227 iwl_mvm_te_clear_data(mvm, te_data); 228 } 229 230 static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, 231 struct iwl_time_event_notif *notif, 232 struct iwl_mvm_time_event_data *te_data) 233 { 234 struct iwl_fw_dbg_trigger_tlv *trig; 235 struct iwl_fw_dbg_trigger_time_event *te_trig; 236 int i; 237 238 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 239 ieee80211_vif_to_wdev(te_data->vif), 240 FW_DBG_TRIGGER_TIME_EVENT); 241 if (!trig) 242 return; 243 244 te_trig = (void *)trig->data; 245 246 for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { 247 u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); 248 u32 trig_action_bitmap = 249 le32_to_cpu(te_trig->time_events[i].action_bitmap); 250 u32 trig_status_bitmap = 251 le32_to_cpu(te_trig->time_events[i].status_bitmap); 252 253 if (trig_te_id != te_data->id || 254 !(trig_action_bitmap & le32_to_cpu(notif->action)) || 255 !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) 256 continue; 257 258 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 259 "Time event %d Action 0x%x received status: %d", 260 te_data->id, 261 le32_to_cpu(notif->action), 262 le32_to_cpu(notif->status)); 263 break; 264 } 265 } 266 267 static void iwl_mvm_p2p_roc_finished(struct iwl_mvm *mvm) 268 { 269 /* 270 * If the IWL_MVM_STATUS_NEED_FLUSH_P2P is already set, then the 271 * roc_done_wk is already scheduled or running, so don't schedule it 272 * again to avoid a race where the roc_done_wk clears this bit after 273 * it is set here, affecting the next run of the roc_done_wk. 274 */ 275 if (!test_and_set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) 276 iwl_mvm_roc_finished(mvm); 277 } 278 279 /* 280 * Handles a FW notification for an event that is known to the driver. 281 * 282 * @mvm: the mvm component 283 * @te_data: the time event data 284 * @notif: the notification data corresponding the time event data. 285 */ 286 static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, 287 struct iwl_mvm_time_event_data *te_data, 288 struct iwl_time_event_notif *notif) 289 { 290 lockdep_assert_held(&mvm->time_event_lock); 291 292 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", 293 le32_to_cpu(notif->unique_id), 294 le32_to_cpu(notif->action)); 295 296 iwl_mvm_te_check_trigger(mvm, notif, te_data); 297 298 /* 299 * The FW sends the start/end time event notifications even for events 300 * that it fails to schedule. This is indicated in the status field of 301 * the notification. This happens in cases that the scheduler cannot 302 * find a schedule that can handle the event (for example requesting a 303 * P2P Device discoveribility, while there are other higher priority 304 * events in the system). 305 */ 306 if (!le32_to_cpu(notif->status)) { 307 const char *msg; 308 309 if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) 310 msg = "Time Event start notification failure"; 311 else 312 msg = "Time Event end notification failure"; 313 314 IWL_DEBUG_TE(mvm, "%s\n", msg); 315 316 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { 317 iwl_mvm_te_clear_data(mvm, te_data); 318 return; 319 } 320 } 321 322 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { 323 IWL_DEBUG_TE(mvm, 324 "TE ended - current time %lu, estimated end %lu\n", 325 jiffies, te_data->end_jiffies); 326 327 switch (te_data->vif->type) { 328 case NL80211_IFTYPE_P2P_DEVICE: 329 ieee80211_remain_on_channel_expired(mvm->hw); 330 iwl_mvm_p2p_roc_finished(mvm); 331 break; 332 case NL80211_IFTYPE_STATION: 333 /* 334 * If we are switching channel, don't disconnect 335 * if the time event is already done. Beacons can 336 * be delayed a bit after the switch. 337 */ 338 if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { 339 IWL_DEBUG_TE(mvm, 340 "No beacon heard and the CS time event is over, don't disconnect\n"); 341 break; 342 } 343 344 /* 345 * By now, we should have finished association 346 * and know the dtim period. 347 */ 348 iwl_mvm_te_check_disconnect(mvm, te_data->vif, 349 !te_data->vif->bss_conf.assoc ? 350 "Not associated and the time event is over already..." : 351 "No beacon heard and the time event is over already..."); 352 break; 353 default: 354 break; 355 } 356 357 iwl_mvm_te_clear_data(mvm, te_data); 358 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { 359 te_data->running = true; 360 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); 361 362 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 363 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); 364 ieee80211_ready_on_channel(mvm->hw); 365 } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { 366 iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); 367 } 368 } else { 369 IWL_WARN(mvm, "Got TE with unknown action\n"); 370 } 371 } 372 373 /* 374 * Handle A Aux ROC time event 375 */ 376 static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, 377 struct iwl_time_event_notif *notif) 378 { 379 struct iwl_mvm_time_event_data *te_data, *tmp; 380 bool aux_roc_te = false; 381 382 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { 383 if (le32_to_cpu(notif->unique_id) == te_data->uid) { 384 aux_roc_te = true; 385 break; 386 } 387 } 388 if (!aux_roc_te) /* Not a Aux ROC time event */ 389 return -EINVAL; 390 391 iwl_mvm_te_check_trigger(mvm, notif, te_data); 392 393 IWL_DEBUG_TE(mvm, 394 "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n", 395 le32_to_cpu(notif->unique_id), 396 le32_to_cpu(notif->action), le32_to_cpu(notif->status)); 397 398 if (!le32_to_cpu(notif->status) || 399 le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { 400 /* End TE, notify mac80211 */ 401 ieee80211_remain_on_channel_expired(mvm->hw); 402 iwl_mvm_roc_finished(mvm); /* flush aux queue */ 403 list_del(&te_data->list); /* remove from list */ 404 te_data->running = false; 405 te_data->vif = NULL; 406 te_data->uid = 0; 407 te_data->id = TE_MAX; 408 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { 409 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); 410 te_data->running = true; 411 ieee80211_ready_on_channel(mvm->hw); /* Start TE */ 412 } else { 413 IWL_DEBUG_TE(mvm, 414 "ERROR: Unknown Aux ROC Time Event (action = %d)\n", 415 le32_to_cpu(notif->action)); 416 return -EINVAL; 417 } 418 419 return 0; 420 } 421 422 /* 423 * The Rx handler for time event notifications 424 */ 425 void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, 426 struct iwl_rx_cmd_buffer *rxb) 427 { 428 struct iwl_rx_packet *pkt = rxb_addr(rxb); 429 struct iwl_time_event_notif *notif = (void *)pkt->data; 430 struct iwl_mvm_time_event_data *te_data, *tmp; 431 432 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", 433 le32_to_cpu(notif->unique_id), 434 le32_to_cpu(notif->action)); 435 436 spin_lock_bh(&mvm->time_event_lock); 437 /* This time event is triggered for Aux ROC request */ 438 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) 439 goto unlock; 440 441 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { 442 if (le32_to_cpu(notif->unique_id) == te_data->uid) 443 iwl_mvm_te_handle_notif(mvm, te_data, notif); 444 } 445 unlock: 446 spin_unlock_bh(&mvm->time_event_lock); 447 } 448 449 static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, 450 struct iwl_rx_packet *pkt, void *data) 451 { 452 struct iwl_mvm *mvm = 453 container_of(notif_wait, struct iwl_mvm, notif_wait); 454 struct iwl_mvm_time_event_data *te_data = data; 455 struct iwl_time_event_notif *resp; 456 int resp_len = iwl_rx_packet_payload_len(pkt); 457 458 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) 459 return true; 460 461 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 462 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); 463 return true; 464 } 465 466 resp = (void *)pkt->data; 467 468 /* te_data->uid is already set in the TIME_EVENT_CMD response */ 469 if (le32_to_cpu(resp->unique_id) != te_data->uid) 470 return false; 471 472 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", 473 te_data->uid); 474 if (!resp->status) 475 IWL_ERR(mvm, 476 "TIME_EVENT_NOTIFICATION received but not executed\n"); 477 478 return true; 479 } 480 481 static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, 482 struct iwl_rx_packet *pkt, void *data) 483 { 484 struct iwl_mvm *mvm = 485 container_of(notif_wait, struct iwl_mvm, notif_wait); 486 struct iwl_mvm_time_event_data *te_data = data; 487 struct iwl_time_event_resp *resp; 488 int resp_len = iwl_rx_packet_payload_len(pkt); 489 490 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) 491 return true; 492 493 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 494 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); 495 return true; 496 } 497 498 resp = (void *)pkt->data; 499 500 /* we should never get a response to another TIME_EVENT_CMD here */ 501 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) 502 return false; 503 504 te_data->uid = le32_to_cpu(resp->unique_id); 505 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", 506 te_data->uid); 507 return true; 508 } 509 510 static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, 511 struct ieee80211_vif *vif, 512 struct iwl_mvm_time_event_data *te_data, 513 struct iwl_time_event_cmd *te_cmd) 514 { 515 static const u16 time_event_response[] = { TIME_EVENT_CMD }; 516 struct iwl_notification_wait wait_time_event; 517 int ret; 518 519 lockdep_assert_held(&mvm->mutex); 520 521 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", 522 le32_to_cpu(te_cmd->duration)); 523 524 spin_lock_bh(&mvm->time_event_lock); 525 if (WARN_ON(te_data->id != TE_MAX)) { 526 spin_unlock_bh(&mvm->time_event_lock); 527 return -EIO; 528 } 529 te_data->vif = vif; 530 te_data->duration = le32_to_cpu(te_cmd->duration); 531 te_data->id = le32_to_cpu(te_cmd->id); 532 list_add_tail(&te_data->list, &mvm->time_event_list); 533 spin_unlock_bh(&mvm->time_event_lock); 534 535 /* 536 * Use a notification wait, which really just processes the 537 * command response and doesn't wait for anything, in order 538 * to be able to process the response and get the UID inside 539 * the RX path. Using CMD_WANT_SKB doesn't work because it 540 * stores the buffer and then wakes up this thread, by which 541 * time another notification (that the time event started) 542 * might already be processed unsuccessfully. 543 */ 544 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, 545 time_event_response, 546 ARRAY_SIZE(time_event_response), 547 iwl_mvm_time_event_response, te_data); 548 549 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 550 sizeof(*te_cmd), te_cmd); 551 if (ret) { 552 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); 553 iwl_remove_notification(&mvm->notif_wait, &wait_time_event); 554 goto out_clear_te; 555 } 556 557 /* No need to wait for anything, so just pass 1 (0 isn't valid) */ 558 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); 559 /* should never fail */ 560 WARN_ON_ONCE(ret); 561 562 if (ret) { 563 out_clear_te: 564 spin_lock_bh(&mvm->time_event_lock); 565 iwl_mvm_te_clear_data(mvm, te_data); 566 spin_unlock_bh(&mvm->time_event_lock); 567 } 568 return ret; 569 } 570 571 void iwl_mvm_protect_session(struct iwl_mvm *mvm, 572 struct ieee80211_vif *vif, 573 u32 duration, u32 min_duration, 574 u32 max_delay, bool wait_for_notif) 575 { 576 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 577 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 578 const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; 579 struct iwl_notification_wait wait_te_notif; 580 struct iwl_time_event_cmd time_cmd = {}; 581 582 lockdep_assert_held(&mvm->mutex); 583 584 if (te_data->running && 585 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { 586 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", 587 jiffies_to_msecs(te_data->end_jiffies - jiffies)); 588 return; 589 } 590 591 if (te_data->running) { 592 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", 593 te_data->uid, 594 jiffies_to_msecs(te_data->end_jiffies - jiffies)); 595 /* 596 * we don't have enough time 597 * cancel the current TE and issue a new one 598 * Of course it would be better to remove the old one only 599 * when the new one is added, but we don't care if we are off 600 * channel for a bit. All we need to do, is not to return 601 * before we actually begin to be on the channel. 602 */ 603 iwl_mvm_stop_session_protection(mvm, vif); 604 } 605 606 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 607 time_cmd.id_and_color = 608 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 609 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); 610 611 time_cmd.apply_time = cpu_to_le32(0); 612 613 time_cmd.max_frags = TE_V2_FRAG_NONE; 614 time_cmd.max_delay = cpu_to_le32(max_delay); 615 /* TODO: why do we need to interval = bi if it is not periodic? */ 616 time_cmd.interval = cpu_to_le32(1); 617 time_cmd.duration = cpu_to_le32(duration); 618 time_cmd.repeat = 1; 619 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 620 TE_V2_NOTIF_HOST_EVENT_END | 621 TE_V2_START_IMMEDIATELY); 622 623 if (!wait_for_notif) { 624 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 625 return; 626 } 627 628 /* 629 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use 630 * right after we send the time event 631 */ 632 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, 633 te_notif_response, 634 ARRAY_SIZE(te_notif_response), 635 iwl_mvm_te_notif, te_data); 636 637 /* If TE was sent OK - wait for the notification that started */ 638 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { 639 IWL_ERR(mvm, "Failed to add TE to protect session\n"); 640 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); 641 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, 642 TU_TO_JIFFIES(max_delay))) { 643 IWL_ERR(mvm, "Failed to protect session until TE\n"); 644 } 645 } 646 647 static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm, 648 struct iwl_mvm_vif *mvmvif, 649 u32 id) 650 { 651 struct iwl_mvm_session_prot_cmd cmd = { 652 .id_and_color = 653 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 654 mvmvif->color)), 655 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE), 656 .conf_id = cpu_to_le32(id), 657 }; 658 int ret; 659 660 ret = iwl_mvm_send_cmd_pdu(mvm, 661 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), 662 0, sizeof(cmd), &cmd); 663 if (ret) 664 IWL_ERR(mvm, 665 "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret); 666 } 667 668 static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 669 struct iwl_mvm_time_event_data *te_data, 670 u32 *uid) 671 { 672 u32 id; 673 struct iwl_mvm_vif *mvmvif; 674 enum nl80211_iftype iftype; 675 676 if (!te_data->vif) 677 return false; 678 679 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); 680 iftype = te_data->vif->type; 681 682 /* 683 * It is possible that by the time we got to this point the time 684 * event was already removed. 685 */ 686 spin_lock_bh(&mvm->time_event_lock); 687 688 /* Save time event uid before clearing its data */ 689 *uid = te_data->uid; 690 id = te_data->id; 691 692 /* 693 * The clear_data function handles time events that were already removed 694 */ 695 iwl_mvm_te_clear_data(mvm, te_data); 696 spin_unlock_bh(&mvm->time_event_lock); 697 698 /* When session protection is used, the te_data->id field 699 * is reused to save session protection's configuration. 700 * For AUX ROC, HOT_SPOT_CMD is used and the te_data->id field is set 701 * to HOT_SPOT_CMD. 702 */ 703 if (fw_has_capa(&mvm->fw->ucode_capa, 704 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD) && 705 id != HOT_SPOT_CMD) { 706 if (mvmvif && id < SESSION_PROTECT_CONF_MAX_ID) { 707 /* Session protection is still ongoing. Cancel it */ 708 iwl_mvm_cancel_session_protection(mvm, mvmvif, id); 709 if (iftype == NL80211_IFTYPE_P2P_DEVICE) { 710 iwl_mvm_p2p_roc_finished(mvm); 711 } 712 } 713 return false; 714 } else { 715 /* It is possible that by the time we try to remove it, the 716 * time event has already ended and removed. In such a case 717 * there is no need to send a removal command. 718 */ 719 if (id == TE_MAX) { 720 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); 721 return false; 722 } 723 } 724 725 return true; 726 } 727 728 /* 729 * Explicit request to remove a aux roc time event. The removal of a time 730 * event needs to be synchronized with the flow of a time event's end 731 * notification, which also removes the time event from the op mode 732 * data structures. 733 */ 734 static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, 735 struct iwl_mvm_vif *mvmvif, 736 struct iwl_mvm_time_event_data *te_data) 737 { 738 struct iwl_hs20_roc_req aux_cmd = {}; 739 u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm); 740 741 u32 uid; 742 int ret; 743 744 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) 745 return; 746 747 aux_cmd.event_unique_id = cpu_to_le32(uid); 748 aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 749 aux_cmd.id_and_color = 750 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 751 IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", 752 le32_to_cpu(aux_cmd.event_unique_id)); 753 ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, 754 len, &aux_cmd); 755 756 if (WARN_ON(ret)) 757 return; 758 } 759 760 /* 761 * Explicit request to remove a time event. The removal of a time event needs to 762 * be synchronized with the flow of a time event's end notification, which also 763 * removes the time event from the op mode data structures. 764 */ 765 void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 766 struct iwl_mvm_vif *mvmvif, 767 struct iwl_mvm_time_event_data *te_data) 768 { 769 struct iwl_time_event_cmd time_cmd = {}; 770 u32 uid; 771 int ret; 772 773 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) 774 return; 775 776 /* When we remove a TE, the UID is to be set in the id field */ 777 time_cmd.id = cpu_to_le32(uid); 778 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 779 time_cmd.id_and_color = 780 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 781 782 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); 783 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 784 sizeof(time_cmd), &time_cmd); 785 if (ret) 786 IWL_ERR(mvm, "Couldn't remove the time event\n"); 787 } 788 789 void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, 790 struct ieee80211_vif *vif) 791 { 792 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 793 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 794 u32 id; 795 796 lockdep_assert_held(&mvm->mutex); 797 798 spin_lock_bh(&mvm->time_event_lock); 799 id = te_data->id; 800 spin_unlock_bh(&mvm->time_event_lock); 801 802 if (fw_has_capa(&mvm->fw->ucode_capa, 803 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) { 804 if (id != SESSION_PROTECT_CONF_ASSOC) { 805 IWL_DEBUG_TE(mvm, 806 "don't remove session protection id=%u\n", 807 id); 808 return; 809 } 810 } else if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) { 811 IWL_DEBUG_TE(mvm, 812 "don't remove TE with id=%u (not session protection)\n", 813 id); 814 return; 815 } 816 817 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 818 } 819 820 void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm, 821 struct iwl_rx_cmd_buffer *rxb) 822 { 823 struct iwl_rx_packet *pkt = rxb_addr(rxb); 824 struct iwl_mvm_session_prot_notif *notif = (void *)pkt->data; 825 struct ieee80211_vif *vif; 826 struct iwl_mvm_vif *mvmvif; 827 828 rcu_read_lock(); 829 vif = iwl_mvm_rcu_dereference_vif_id(mvm, le32_to_cpu(notif->mac_id), 830 true); 831 832 if (!vif) 833 goto out_unlock; 834 835 mvmvif = iwl_mvm_vif_from_mac80211(vif); 836 837 /* The vif is not a P2P_DEVICE, maintain its time_event_data */ 838 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) { 839 struct iwl_mvm_time_event_data *te_data = 840 &mvmvif->time_event_data; 841 842 if (!le32_to_cpu(notif->status)) { 843 iwl_mvm_te_check_disconnect(mvm, vif, 844 "Session protection failure"); 845 spin_lock_bh(&mvm->time_event_lock); 846 iwl_mvm_te_clear_data(mvm, te_data); 847 spin_unlock_bh(&mvm->time_event_lock); 848 } 849 850 if (le32_to_cpu(notif->start)) { 851 spin_lock_bh(&mvm->time_event_lock); 852 te_data->running = le32_to_cpu(notif->start); 853 te_data->end_jiffies = 854 TU_TO_EXP_TIME(te_data->duration); 855 spin_unlock_bh(&mvm->time_event_lock); 856 } else { 857 /* 858 * By now, we should have finished association 859 * and know the dtim period. 860 */ 861 iwl_mvm_te_check_disconnect(mvm, vif, 862 !vif->bss_conf.assoc ? 863 "Not associated and the session protection is over already..." : 864 "No beacon heard and the session protection is over already..."); 865 spin_lock_bh(&mvm->time_event_lock); 866 iwl_mvm_te_clear_data(mvm, te_data); 867 spin_unlock_bh(&mvm->time_event_lock); 868 } 869 870 goto out_unlock; 871 } 872 873 if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) { 874 /* End TE, notify mac80211 */ 875 mvmvif->time_event_data.id = SESSION_PROTECT_CONF_MAX_ID; 876 ieee80211_remain_on_channel_expired(mvm->hw); 877 iwl_mvm_p2p_roc_finished(mvm); 878 } else if (le32_to_cpu(notif->start)) { 879 if (WARN_ON(mvmvif->time_event_data.id != 880 le32_to_cpu(notif->conf_id))) 881 goto out_unlock; 882 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); 883 ieee80211_ready_on_channel(mvm->hw); /* Start TE */ 884 } 885 886 out_unlock: 887 rcu_read_unlock(); 888 } 889 890 static int 891 iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm, 892 struct ieee80211_vif *vif, 893 int duration, 894 enum ieee80211_roc_type type) 895 { 896 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 897 struct iwl_mvm_session_prot_cmd cmd = { 898 .id_and_color = 899 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 900 mvmvif->color)), 901 .action = cpu_to_le32(FW_CTXT_ACTION_ADD), 902 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)), 903 }; 904 905 lockdep_assert_held(&mvm->mutex); 906 907 /* The time_event_data.id field is reused to save session 908 * protection's configuration. 909 */ 910 switch (type) { 911 case IEEE80211_ROC_TYPE_NORMAL: 912 mvmvif->time_event_data.id = 913 SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV; 914 break; 915 case IEEE80211_ROC_TYPE_MGMT_TX: 916 mvmvif->time_event_data.id = 917 SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION; 918 break; 919 default: 920 WARN_ONCE(1, "Got an invalid ROC type\n"); 921 return -EINVAL; 922 } 923 924 cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id); 925 return iwl_mvm_send_cmd_pdu(mvm, 926 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), 927 0, sizeof(cmd), &cmd); 928 } 929 930 int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 931 int duration, enum ieee80211_roc_type type) 932 { 933 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 934 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 935 struct iwl_time_event_cmd time_cmd = {}; 936 937 lockdep_assert_held(&mvm->mutex); 938 if (te_data->running) { 939 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); 940 return -EBUSY; 941 } 942 943 if (fw_has_capa(&mvm->fw->ucode_capa, 944 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) 945 return iwl_mvm_start_p2p_roc_session_protection(mvm, vif, 946 duration, 947 type); 948 949 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 950 time_cmd.id_and_color = 951 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 952 953 switch (type) { 954 case IEEE80211_ROC_TYPE_NORMAL: 955 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); 956 break; 957 case IEEE80211_ROC_TYPE_MGMT_TX: 958 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); 959 break; 960 default: 961 WARN_ONCE(1, "Got an invalid ROC type\n"); 962 return -EINVAL; 963 } 964 965 time_cmd.apply_time = cpu_to_le32(0); 966 time_cmd.interval = cpu_to_le32(1); 967 968 /* 969 * The P2P Device TEs can have lower priority than other events 970 * that are being scheduled by the driver/fw, and thus it might not be 971 * scheduled. To improve the chances of it being scheduled, allow them 972 * to be fragmented, and in addition allow them to be delayed. 973 */ 974 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); 975 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); 976 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); 977 time_cmd.repeat = 1; 978 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 979 TE_V2_NOTIF_HOST_EVENT_END | 980 TE_V2_START_IMMEDIATELY); 981 982 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 983 } 984 985 static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm) 986 { 987 struct iwl_mvm_time_event_data *te_data; 988 989 lockdep_assert_held(&mvm->mutex); 990 991 spin_lock_bh(&mvm->time_event_lock); 992 993 /* 994 * Iterate over the list of time events and find the time event that is 995 * associated with a P2P_DEVICE interface. 996 * This assumes that a P2P_DEVICE interface can have only a single time 997 * event at any given time and this time event coresponds to a ROC 998 * request 999 */ 1000 list_for_each_entry(te_data, &mvm->time_event_list, list) { 1001 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) 1002 goto out; 1003 } 1004 1005 /* There can only be at most one AUX ROC time event, we just use the 1006 * list to simplify/unify code. Remove it if it exists. 1007 */ 1008 te_data = list_first_entry_or_null(&mvm->aux_roc_te_list, 1009 struct iwl_mvm_time_event_data, 1010 list); 1011 out: 1012 spin_unlock_bh(&mvm->time_event_lock); 1013 return te_data; 1014 } 1015 1016 void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm) 1017 { 1018 struct iwl_mvm_time_event_data *te_data; 1019 u32 uid; 1020 1021 te_data = iwl_mvm_get_roc_te(mvm); 1022 if (te_data) 1023 __iwl_mvm_remove_time_event(mvm, te_data, &uid); 1024 } 1025 1026 void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1027 { 1028 struct iwl_mvm_vif *mvmvif; 1029 struct iwl_mvm_time_event_data *te_data; 1030 1031 if (fw_has_capa(&mvm->fw->ucode_capa, 1032 IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) { 1033 mvmvif = iwl_mvm_vif_from_mac80211(vif); 1034 1035 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1036 iwl_mvm_cancel_session_protection(mvm, mvmvif, 1037 mvmvif->time_event_data.id); 1038 iwl_mvm_p2p_roc_finished(mvm); 1039 } else { 1040 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, 1041 &mvmvif->hs_time_event_data); 1042 iwl_mvm_roc_finished(mvm); 1043 } 1044 1045 return; 1046 } 1047 1048 te_data = iwl_mvm_get_roc_te(mvm); 1049 if (!te_data) { 1050 IWL_WARN(mvm, "No remain on channel event\n"); 1051 return; 1052 } 1053 1054 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); 1055 1056 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1057 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 1058 iwl_mvm_p2p_roc_finished(mvm); 1059 } else { 1060 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); 1061 iwl_mvm_roc_finished(mvm); 1062 } 1063 } 1064 1065 void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm, 1066 struct ieee80211_vif *vif) 1067 { 1068 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1069 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 1070 u32 id; 1071 1072 lockdep_assert_held(&mvm->mutex); 1073 1074 spin_lock_bh(&mvm->time_event_lock); 1075 id = te_data->id; 1076 spin_unlock_bh(&mvm->time_event_lock); 1077 1078 if (id != TE_CHANNEL_SWITCH_PERIOD) 1079 return; 1080 1081 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 1082 } 1083 1084 int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, 1085 struct ieee80211_vif *vif, 1086 u32 duration, u32 apply_time) 1087 { 1088 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1089 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 1090 struct iwl_time_event_cmd time_cmd = {}; 1091 1092 lockdep_assert_held(&mvm->mutex); 1093 1094 if (te_data->running) { 1095 u32 id; 1096 1097 spin_lock_bh(&mvm->time_event_lock); 1098 id = te_data->id; 1099 spin_unlock_bh(&mvm->time_event_lock); 1100 1101 if (id == TE_CHANNEL_SWITCH_PERIOD) { 1102 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); 1103 return -EBUSY; 1104 } 1105 1106 /* 1107 * Remove the session protection time event to allow the 1108 * channel switch. If we got here, we just heard a beacon so 1109 * the session protection is not needed anymore anyway. 1110 */ 1111 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 1112 } 1113 1114 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 1115 time_cmd.id_and_color = 1116 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 1117 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); 1118 time_cmd.apply_time = cpu_to_le32(apply_time); 1119 time_cmd.max_frags = TE_V2_FRAG_NONE; 1120 time_cmd.duration = cpu_to_le32(duration); 1121 time_cmd.repeat = 1; 1122 time_cmd.interval = cpu_to_le32(1); 1123 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 1124 TE_V2_ABSENCE); 1125 if (!apply_time) 1126 time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY); 1127 1128 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 1129 } 1130 1131 static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait, 1132 struct iwl_rx_packet *pkt, void *data) 1133 { 1134 struct iwl_mvm *mvm = 1135 container_of(notif_wait, struct iwl_mvm, notif_wait); 1136 struct iwl_mvm_session_prot_notif *resp; 1137 int resp_len = iwl_rx_packet_payload_len(pkt); 1138 1139 if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF || 1140 pkt->hdr.group_id != MAC_CONF_GROUP)) 1141 return true; 1142 1143 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 1144 IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n"); 1145 return true; 1146 } 1147 1148 resp = (void *)pkt->data; 1149 1150 if (!resp->status) 1151 IWL_ERR(mvm, 1152 "TIME_EVENT_NOTIFICATION received but not executed\n"); 1153 1154 return true; 1155 } 1156 1157 void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm, 1158 struct ieee80211_vif *vif, 1159 u32 duration, u32 min_duration, 1160 bool wait_for_notif) 1161 { 1162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1163 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 1164 const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) }; 1165 struct iwl_notification_wait wait_notif; 1166 struct iwl_mvm_session_prot_cmd cmd = { 1167 .id_and_color = 1168 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1169 mvmvif->color)), 1170 .action = cpu_to_le32(FW_CTXT_ACTION_ADD), 1171 .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC), 1172 .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)), 1173 }; 1174 1175 lockdep_assert_held(&mvm->mutex); 1176 1177 spin_lock_bh(&mvm->time_event_lock); 1178 if (te_data->running && 1179 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { 1180 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", 1181 jiffies_to_msecs(te_data->end_jiffies - jiffies)); 1182 spin_unlock_bh(&mvm->time_event_lock); 1183 1184 return; 1185 } 1186 1187 iwl_mvm_te_clear_data(mvm, te_data); 1188 /* 1189 * The time_event_data.id field is reused to save session 1190 * protection's configuration. 1191 */ 1192 te_data->id = le32_to_cpu(cmd.conf_id); 1193 te_data->duration = le32_to_cpu(cmd.duration_tu); 1194 te_data->vif = vif; 1195 spin_unlock_bh(&mvm->time_event_lock); 1196 1197 IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n", 1198 le32_to_cpu(cmd.duration_tu)); 1199 1200 if (!wait_for_notif) { 1201 if (iwl_mvm_send_cmd_pdu(mvm, 1202 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), 1203 0, sizeof(cmd), &cmd)) { 1204 IWL_ERR(mvm, 1205 "Couldn't send the SESSION_PROTECTION_CMD\n"); 1206 spin_lock_bh(&mvm->time_event_lock); 1207 iwl_mvm_te_clear_data(mvm, te_data); 1208 spin_unlock_bh(&mvm->time_event_lock); 1209 } 1210 1211 return; 1212 } 1213 1214 iwl_init_notification_wait(&mvm->notif_wait, &wait_notif, 1215 notif, ARRAY_SIZE(notif), 1216 iwl_mvm_session_prot_notif, NULL); 1217 1218 if (iwl_mvm_send_cmd_pdu(mvm, 1219 WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), 1220 0, sizeof(cmd), &cmd)) { 1221 IWL_ERR(mvm, 1222 "Couldn't send the SESSION_PROTECTION_CMD\n"); 1223 iwl_remove_notification(&mvm->notif_wait, &wait_notif); 1224 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif, 1225 TU_TO_JIFFIES(100))) { 1226 IWL_ERR(mvm, 1227 "Failed to protect session until session protection\n"); 1228 } 1229 }
Cache object: 3b8b4f1531184a26c22f0bc34a0a2eaa
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