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 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * 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. 14 * 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. 19 * 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, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 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 47 * distribution. 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. 51 * 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. 63 * 64 *****************************************************************************/ 65 66#include <linux/jiffies.h> 67#include <net/mac80211.h> 68 69#include "iwl-notif-wait.h" 70#include "iwl-trans.h" 71#include "fw-api.h" 72#include "time-event.h" 73#include "mvm.h" 74#include "iwl-io.h" 75#include "iwl-prph.h" 76 77/* 78 * For the high priority TE use a time event type that has similar priority to 79 * the FW's action scan priority. 80 */ 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 83 84void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, 85 struct iwl_mvm_time_event_data *te_data) 86{ 87 lockdep_assert_held(&mvm->time_event_lock); 88 89 if (te_data->id == TE_MAX) 90 return; 91 92 list_del(&te_data->list); 93 te_data->running = false; 94 te_data->uid = 0; 95 te_data->id = TE_MAX; 96 te_data->vif = NULL; 97} 98 99void iwl_mvm_roc_done_wk(struct work_struct *wk) 100{ 101 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); 102 u32 queues = 0; 103 104 /* 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). 110 */ 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); 114 } 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); 118 } 119 120 synchronize_net(); 121 122 /* 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 126 * time event. 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. 131 */ 132 iwl_mvm_flush_tx_path(mvm, queues, false); 133} 134 135static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) 136{ 137 /* 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. 143 */ 144 schedule_work(&mvm->roc_done_wk); 145} 146 147static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) 148{ 149 struct ieee80211_vif *csa_vif; 150 151 rcu_read_lock(); 152 153 csa_vif = rcu_dereference(mvm->csa_vif); 154 if (!csa_vif || !csa_vif->csa_active) 155 goto out_unlock; 156 157 IWL_DEBUG_TE(mvm, "CSA NOA started\n"); 158 159 /* 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. 164 */ 165 if (!ieee80211_csa_is_complete(csa_vif)) { 166 IWL_WARN(mvm, "CSA NOA started too early\n"); 167 goto out_unlock; 168 } 169 170 ieee80211_csa_finish(csa_vif); 171 172 rcu_read_unlock(); 173 174 RCU_INIT_POINTER(mvm->csa_vif, NULL); 175 176 return; 177 178out_unlock: 179 rcu_read_unlock(); 180} 181 182static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, 183 struct ieee80211_vif *vif, 184 const char *errmsg) 185{ 186 if (vif->type != NL80211_IFTYPE_STATION) 187 return false; 188 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) 189 return false; 190 if (errmsg) 191 IWL_ERR(mvm, "%s\n", errmsg); 192 193 iwl_mvm_connection_loss(mvm, vif, errmsg); 194 return true; 195} 196 197static void 198iwl_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) 201{ 202 struct ieee80211_vif *vif = te_data->vif; 203 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 204 205 if (!notif->status) 206 IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); 207 208 switch (te_data->vif->type) { 209 case NL80211_IFTYPE_AP: 210 if (!notif->status) 211 mvmvif->csa_failed = true; 212 iwl_mvm_csa_noa_start(mvm); 213 break; 214 case NL80211_IFTYPE_STATION: 215 if (!notif->status) { 216 iwl_mvm_connection_loss(mvm, vif, 217 "CSA TE failed to start"); 218 break; 219 } 220 iwl_mvm_csa_client_absent(mvm, te_data->vif); 221 ieee80211_chswitch_done(te_data->vif, true); 222 break; 223 default: 224 /* should never happen */ 225 WARN_ON_ONCE(1); 226 break; 227 } 228 229 /* we don't need it anymore */ 230 iwl_mvm_te_clear_data(mvm, te_data); 231} 232 233static 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) 236{ 237 struct iwl_fw_dbg_trigger_tlv *trig; 238 struct iwl_fw_dbg_trigger_time_event *te_trig; 239 int i; 240 241 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT)) 242 return; 243 244 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT); 245 te_trig = (void *)trig->data; 246 247 if (!iwl_fw_dbg_trigger_check_stop(mvm, te_data->vif, trig)) 248 return; 249 250 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); 256 257 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)))) 260 continue; 261 262 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 263 "Time event %d Action 0x%x received status: %d", 264 te_data->id, 265 le32_to_cpu(notif->action), 266 le32_to_cpu(notif->status)); 267 break; 268 } 269} 270 271/* 272 * Handles a FW notification for an event that is known to the driver. 273 * 274 * @mvm: the mvm component 275 * @te_data: the time event data 276 * @notif: the notification data corresponding the time event data. 277 */ 278static 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) 281{ 282 lockdep_assert_held(&mvm->time_event_lock); 283 284 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)); 287 288 iwl_mvm_te_check_trigger(mvm, notif, te_data); 289 290 /* 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). 297 */ 298 if (!le32_to_cpu(notif->status)) { 299 const char *msg; 300 301 if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) 302 msg = "Time Event start notification failure"; 303 else 304 msg = "Time Event end notification failure"; 305 306 IWL_DEBUG_TE(mvm, "%s\n", msg); 307 308 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { 309 iwl_mvm_te_clear_data(mvm, te_data); 310 return; 311 } 312 } 313 314 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { 315 IWL_DEBUG_TE(mvm, 316 "TE ended - current time %lu, estimated end %lu\n", 317 jiffies, te_data->end_jiffies); 318 319 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); 323 break; 324 case NL80211_IFTYPE_STATION: 325 /* 326 * By now, we should have finished association 327 * and know the dtim period. 328 */ 329 iwl_mvm_te_check_disconnect(mvm, te_data->vif, 330 "No association and the time event is over already..."); 331 break; 332 default: 333 break; 334 } 335 336 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); 340 341 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); 347 } 348 } else { 349 IWL_WARN(mvm, "Got TE with unknown action\n"); 350 } 351} 352 353/* 354 * Handle A Aux ROC time event 355 */ 356static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, 357 struct iwl_time_event_notif *notif) 358{ 359 struct iwl_mvm_time_event_data *te_data, *tmp; 360 bool aux_roc_te = false; 361 362 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) { 364 aux_roc_te = true; 365 break; 366 } 367 } 368 if (!aux_roc_te) /* Not a Aux ROC time event */ 369 return -EINVAL; 370 371 iwl_mvm_te_check_trigger(mvm, notif, te_data); 372 373 if (!le32_to_cpu(notif->status)) { 374 IWL_DEBUG_TE(mvm, 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"); 378 return -EINVAL; 379 } 380 381 IWL_DEBUG_TE(mvm, 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)); 385 386 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; 392 te_data->vif = NULL; 393 te_data->uid = 0; 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 */ 400 } else { 401 IWL_DEBUG_TE(mvm, 402 "ERROR: Unknown Aux ROC Time Event (action = %d)\n", 403 le32_to_cpu(notif->action)); 404 return -EINVAL; 405 } 406 407 return 0; 408} 409 410/* 411 * The Rx handler for time event notifications 412 */ 413int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, 414 struct iwl_rx_cmd_buffer *rxb, 415 struct iwl_device_cmd *cmd) 416{ 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; 420 421 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)); 424 425 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)) 428 goto unlock; 429 430 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); 433 } 434unlock: 435 spin_unlock_bh(&mvm->time_event_lock); 436 437 return 0; 438} 439 440static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, 441 struct iwl_rx_packet *pkt, void *data) 442{ 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); 448 449 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) 450 return true; 451 452 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 453 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); 454 return true; 455 } 456 457 resp = (void *)pkt->data; 458 459 /* te_data->uid is already set in the TIME_EVENT_CMD response */ 460 if (le32_to_cpu(resp->unique_id) != te_data->uid) 461 return false; 462 463 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", 464 te_data->uid); 465 if (!resp->status) 466 IWL_ERR(mvm, 467 "TIME_EVENT_NOTIFICATION received but not executed\n"); 468 469 return true; 470} 471 472static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, 473 struct iwl_rx_packet *pkt, void *data) 474{ 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); 480 481 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) 482 return true; 483 484 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 485 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); 486 return true; 487 } 488 489 resp = (void *)pkt->data; 490 491 /* 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)) 493 return false; 494 495 te_data->uid = le32_to_cpu(resp->unique_id); 496 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", 497 te_data->uid); 498 return true; 499} 500 501static 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) 505{ 506 static const u8 time_event_response[] = { TIME_EVENT_CMD }; 507 struct iwl_notification_wait wait_time_event; 508 int ret; 509 510 lockdep_assert_held(&mvm->mutex); 511 512 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", 513 le32_to_cpu(te_cmd->duration)); 514 515 spin_lock_bh(&mvm->time_event_lock); 516 if (WARN_ON(te_data->id != TE_MAX)) { 517 spin_unlock_bh(&mvm->time_event_lock); 518 return -EIO; 519 } 520 te_data->vif = vif; 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); 525 526 /* 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. 534 */ 535 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, 536 time_event_response, 537 ARRAY_SIZE(time_event_response), 538 iwl_mvm_time_event_response, te_data); 539 540 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 541 sizeof(*te_cmd), te_cmd); 542 if (ret) { 543 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); 544 iwl_remove_notification(&mvm->notif_wait, &wait_time_event); 545 goto out_clear_te; 546 } 547 548 /* 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 */ 551 WARN_ON_ONCE(ret); 552 553 if (ret) { 554 out_clear_te: 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); 558 } 559 return ret; 560} 561 562void 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) 566{ 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 = {}; 572 573 lockdep_assert_held(&mvm->mutex); 574 575 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)); 579 return; 580 } 581 582 if (te_data->running) { 583 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", 584 te_data->uid, 585 jiffies_to_msecs(te_data->end_jiffies - jiffies)); 586 /* 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. 593 */ 594 iwl_mvm_stop_session_protection(mvm, vif); 595 } 596 597 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); 601 602 time_cmd.apply_time = 603 cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); 604 605 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); 610 time_cmd.repeat = 1; 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); 614 615 if (!wait_for_notif) { 616 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 617 return; 618 } 619 620 /* 621 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use 622 * right after we send the time event 623 */ 624 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, 625 te_notif_response, 626 ARRAY_SIZE(te_notif_response), 627 iwl_mvm_te_notif, te_data); 628 629 /* 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"); 636 } 637} 638 639static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 640 struct iwl_mvm_time_event_data *te_data, 641 u32 *uid) 642{ 643 u32 id; 644 645 /* 646 * It is possible that by the time we got to this point the time 647 * event was already removed. 648 */ 649 spin_lock_bh(&mvm->time_event_lock); 650 651 /* Save time event uid before clearing its data */ 652 *uid = te_data->uid; 653 id = te_data->id; 654 655 /* 656 * The clear_data function handles time events that were already removed 657 */ 658 iwl_mvm_te_clear_data(mvm, te_data); 659 spin_unlock_bh(&mvm->time_event_lock); 660 661 /* 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. 665 */ 666 if (id == TE_MAX) { 667 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); 668 return false; 669 } 670 671 return true; 672} 673 674/* 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 678 * data structures. 679 */ 680static 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) 683{ 684 struct iwl_hs20_roc_req aux_cmd = {}; 685 u32 uid; 686 int ret; 687 688 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) 689 return; 690 691 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); 699 700 if (WARN_ON(ret)) 701 return; 702} 703 704/* 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. 708 */ 709void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 710 struct iwl_mvm_vif *mvmvif, 711 struct iwl_mvm_time_event_data *te_data) 712{ 713 struct iwl_time_event_cmd time_cmd = {}; 714 u32 uid; 715 int ret; 716 717 if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) 718 return; 719 720 /* 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)); 725 726 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); 729 if (WARN_ON(ret)) 730 return; 731} 732 733void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, 734 struct ieee80211_vif *vif) 735{ 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; 738 739 lockdep_assert_held(&mvm->mutex); 740 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 741} 742 743int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 744 int duration, enum ieee80211_roc_type type) 745{ 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 = {}; 749 750 lockdep_assert_held(&mvm->mutex); 751 if (te_data->running) { 752 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); 753 return -EBUSY; 754 } 755 756 /* 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. 759 */ 760 flush_work(&mvm->roc_done_wk); 761 762 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)); 765 766 switch (type) { 767 case IEEE80211_ROC_TYPE_NORMAL: 768 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); 769 break; 770 case IEEE80211_ROC_TYPE_MGMT_TX: 771 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); 772 break; 773 default: 774 WARN_ONCE(1, "Got an invalid ROC type\n"); 775 return -EINVAL; 776 } 777 778 time_cmd.apply_time = cpu_to_le32(0); 779 time_cmd.interval = cpu_to_le32(1); 780 781 /* 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. 786 */ 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)); 790 time_cmd.repeat = 1; 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); 794 795 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 796} 797 798void iwl_mvm_stop_roc(struct iwl_mvm *mvm) 799{ 800 struct iwl_mvm_vif *mvmvif; 801 struct iwl_mvm_time_event_data *te_data; 802 bool is_p2p = false; 803 804 lockdep_assert_held(&mvm->mutex); 805 806 mvmvif = NULL; 807 spin_lock_bh(&mvm->time_event_lock); 808 809 /* 810 * Iterate over the list of time events and find the time event that is 811 * associated with a P2P_DEVICE interface. 812 * This assumes that a P2P_DEVICE interface can have only a single time 813 * event at any given time and this time event coresponds to a ROC 814 * request 815 */ 816 list_for_each_entry(te_data, &mvm->time_event_list, list) { 817 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 818 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); 819 is_p2p = true; 820 goto remove_te; 821 } 822 } 823 824 /* 825 * Iterate over the list of aux roc time events and find the time 826 * event that is associated with a BSS interface. 827 * This assumes that a BSS interface can have only a single time 828 * event at any given time and this time event corresponds to a ROC 829 * request 830 */ 831 list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) { 832 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); 833 goto remove_te; 834 } 835 836remove_te: 837 spin_unlock_bh(&mvm->time_event_lock); 838 839 if (!mvmvif) { 840 IWL_WARN(mvm, "No remain on channel event\n"); 841 return; 842 } 843 844 if (is_p2p) 845 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 846 else 847 iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); 848 849 iwl_mvm_roc_finished(mvm); 850} 851 852int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, 853 struct ieee80211_vif *vif, 854 u32 duration, u32 apply_time) 855{ 856 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 857 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 858 struct iwl_time_event_cmd time_cmd = {}; 859 860 lockdep_assert_held(&mvm->mutex); 861 862 if (te_data->running) { 863 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); 864 return -EBUSY; 865 } 866 867 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 868 time_cmd.id_and_color = 869 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 870 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); 871 time_cmd.apply_time = cpu_to_le32(apply_time); 872 time_cmd.max_frags = TE_V2_FRAG_NONE; 873 time_cmd.duration = cpu_to_le32(duration); 874 time_cmd.repeat = 1; 875 time_cmd.interval = cpu_to_le32(1); 876 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 877 TE_V2_ABSENCE); 878 879 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 880} 881