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 - 2014 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 - 2014 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 if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) 114 queues |= BIT(mvm->aux_queue); 115 116 iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); 117 118 synchronize_net(); 119 120 /* 121 * Flush the offchannel queue -- this is called when the time 122 * event finishes or is cancelled, so that frames queued for it 123 * won't get stuck on the queue and be transmitted in the next 124 * time event. 125 * We have to send the command asynchronously since this cannot 126 * be under the mutex for locking reasons, but that's not an 127 * issue as it will have to complete before the next command is 128 * executed, and a new time event means a new command. 129 */ 130 iwl_mvm_flush_tx_path(mvm, queues, false); 131} 132 133static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) 134{ 135 /* 136 * Of course, our status bit is just as racy as mac80211, so in 137 * addition, fire off the work struct which will drop all frames 138 * from the hardware queues that made it through the race. First 139 * it will of course synchronize the TX path to make sure that 140 * any *new* TX will be rejected. 141 */ 142 schedule_work(&mvm->roc_done_wk); 143} 144 145static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) 146{ 147 struct ieee80211_vif *csa_vif; 148 149 rcu_read_lock(); 150 151 csa_vif = rcu_dereference(mvm->csa_vif); 152 if (!csa_vif || !csa_vif->csa_active) 153 goto out_unlock; 154 155 IWL_DEBUG_TE(mvm, "CSA NOA started\n"); 156 157 /* 158 * CSA NoA is started but we still have beacons to 159 * transmit on the current channel. 160 * So we just do nothing here and the switch 161 * will be performed on the last TBTT. 162 */ 163 if (!ieee80211_csa_is_complete(csa_vif)) { 164 IWL_WARN(mvm, "CSA NOA started too early\n"); 165 goto out_unlock; 166 } 167 168 ieee80211_csa_finish(csa_vif); 169 170 rcu_read_unlock(); 171 172 RCU_INIT_POINTER(mvm->csa_vif, NULL); 173 174 return; 175 176out_unlock: 177 rcu_read_unlock(); 178} 179 180static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, 181 struct ieee80211_vif *vif, 182 const char *errmsg) 183{ 184 if (vif->type != NL80211_IFTYPE_STATION) 185 return false; 186 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) 187 return false; 188 if (errmsg) 189 IWL_ERR(mvm, "%s\n", errmsg); 190 ieee80211_connection_loss(vif); 191 return true; 192} 193 194/* 195 * Handles a FW notification for an event that is known to the driver. 196 * 197 * @mvm: the mvm component 198 * @te_data: the time event data 199 * @notif: the notification data corresponding the time event data. 200 */ 201static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, 202 struct iwl_mvm_time_event_data *te_data, 203 struct iwl_time_event_notif *notif) 204{ 205 lockdep_assert_held(&mvm->time_event_lock); 206 207 IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", 208 le32_to_cpu(notif->unique_id), 209 le32_to_cpu(notif->action)); 210 211 /* 212 * The FW sends the start/end time event notifications even for events 213 * that it fails to schedule. This is indicated in the status field of 214 * the notification. This happens in cases that the scheduler cannot 215 * find a schedule that can handle the event (for example requesting a 216 * P2P Device discoveribility, while there are other higher priority 217 * events in the system). 218 */ 219 if (!le32_to_cpu(notif->status)) { 220 bool start = le32_to_cpu(notif->action) & 221 TE_V2_NOTIF_HOST_EVENT_START; 222 IWL_WARN(mvm, "Time Event %s notification failure\n", 223 start ? "start" : "end"); 224 if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) { 225 iwl_mvm_te_clear_data(mvm, te_data); 226 return; 227 } 228 } 229 230 if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { 231 IWL_DEBUG_TE(mvm, 232 "TE ended - current time %lu, estimated end %lu\n", 233 jiffies, te_data->end_jiffies); 234 235 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 236 ieee80211_remain_on_channel_expired(mvm->hw); 237 iwl_mvm_roc_finished(mvm); 238 } 239 240 /* 241 * By now, we should have finished association 242 * and know the dtim period. 243 */ 244 iwl_mvm_te_check_disconnect(mvm, te_data->vif, 245 "No association and the time event is over already..."); 246 iwl_mvm_te_clear_data(mvm, te_data); 247 } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { 248 te_data->running = true; 249 te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); 250 251 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 252 set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); 253 iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); 254 ieee80211_ready_on_channel(mvm->hw); 255 } else if (te_data->vif->type == NL80211_IFTYPE_AP) { 256 if (le32_to_cpu(notif->status)) 257 iwl_mvm_csa_noa_start(mvm); 258 else 259 IWL_DEBUG_TE(mvm, "CSA NOA failed to start\n"); 260 261 /* we don't need it anymore */ 262 iwl_mvm_te_clear_data(mvm, te_data); 263 } 264 } else { 265 IWL_WARN(mvm, "Got TE with unknown action\n"); 266 } 267} 268 269/* 270 * Handle A Aux ROC time event 271 */ 272static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, 273 struct iwl_time_event_notif *notif) 274{ 275 struct iwl_mvm_time_event_data *te_data, *tmp; 276 bool aux_roc_te = false; 277 278 list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { 279 if (le32_to_cpu(notif->unique_id) == te_data->uid) { 280 aux_roc_te = true; 281 break; 282 } 283 } 284 if (!aux_roc_te) /* Not a Aux ROC time event */ 285 return -EINVAL; 286 287 if (!le32_to_cpu(notif->status)) { 288 IWL_DEBUG_TE(mvm, 289 "ERROR: Aux ROC Time Event %s notification failure\n", 290 (le32_to_cpu(notif->action) & 291 TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); 292 return -EINVAL; 293 } 294 295 IWL_DEBUG_TE(mvm, 296 "Aux ROC time event notification - UID = 0x%x action %d\n", 297 le32_to_cpu(notif->unique_id), 298 le32_to_cpu(notif->action)); 299 300 if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { 301 /* End TE, notify mac80211 */ 302 ieee80211_remain_on_channel_expired(mvm->hw); 303 iwl_mvm_roc_finished(mvm); /* flush aux queue */ 304 list_del(&te_data->list); /* remove from list */ 305 te_data->running = false; 306 te_data->vif = NULL; 307 te_data->uid = 0; 308 te_data->id = TE_MAX; 309 } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { 310 set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); 311 te_data->running = true; 312 ieee80211_ready_on_channel(mvm->hw); /* Start TE */ 313 } else { 314 IWL_DEBUG_TE(mvm, 315 "ERROR: Unknown Aux ROC Time Event (action = %d)\n", 316 le32_to_cpu(notif->action)); 317 return -EINVAL; 318 } 319 320 return 0; 321} 322 323/* 324 * The Rx handler for time event notifications 325 */ 326int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, 327 struct iwl_rx_cmd_buffer *rxb, 328 struct iwl_device_cmd *cmd) 329{ 330 struct iwl_rx_packet *pkt = rxb_addr(rxb); 331 struct iwl_time_event_notif *notif = (void *)pkt->data; 332 struct iwl_mvm_time_event_data *te_data, *tmp; 333 334 IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", 335 le32_to_cpu(notif->unique_id), 336 le32_to_cpu(notif->action)); 337 338 spin_lock_bh(&mvm->time_event_lock); 339 /* This time event is triggered for Aux ROC request */ 340 if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) 341 goto unlock; 342 343 list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { 344 if (le32_to_cpu(notif->unique_id) == te_data->uid) 345 iwl_mvm_te_handle_notif(mvm, te_data, notif); 346 } 347unlock: 348 spin_unlock_bh(&mvm->time_event_lock); 349 350 return 0; 351} 352 353static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, 354 struct iwl_rx_packet *pkt, void *data) 355{ 356 struct iwl_mvm *mvm = 357 container_of(notif_wait, struct iwl_mvm, notif_wait); 358 struct iwl_mvm_time_event_data *te_data = data; 359 struct iwl_time_event_notif *resp; 360 int resp_len = iwl_rx_packet_payload_len(pkt); 361 362 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) 363 return true; 364 365 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 366 IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); 367 return true; 368 } 369 370 resp = (void *)pkt->data; 371 372 /* te_data->uid is already set in the TIME_EVENT_CMD response */ 373 if (le32_to_cpu(resp->unique_id) != te_data->uid) 374 return false; 375 376 IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", 377 te_data->uid); 378 if (!resp->status) 379 IWL_ERR(mvm, 380 "TIME_EVENT_NOTIFICATION received but not executed\n"); 381 382 return true; 383} 384 385static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, 386 struct iwl_rx_packet *pkt, void *data) 387{ 388 struct iwl_mvm *mvm = 389 container_of(notif_wait, struct iwl_mvm, notif_wait); 390 struct iwl_mvm_time_event_data *te_data = data; 391 struct iwl_time_event_resp *resp; 392 int resp_len = iwl_rx_packet_payload_len(pkt); 393 394 if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) 395 return true; 396 397 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 398 IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); 399 return true; 400 } 401 402 resp = (void *)pkt->data; 403 404 /* we should never get a response to another TIME_EVENT_CMD here */ 405 if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) 406 return false; 407 408 te_data->uid = le32_to_cpu(resp->unique_id); 409 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", 410 te_data->uid); 411 return true; 412} 413 414static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, 415 struct ieee80211_vif *vif, 416 struct iwl_mvm_time_event_data *te_data, 417 struct iwl_time_event_cmd *te_cmd) 418{ 419 static const u8 time_event_response[] = { TIME_EVENT_CMD }; 420 struct iwl_notification_wait wait_time_event; 421 int ret; 422 423 lockdep_assert_held(&mvm->mutex); 424 425 IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", 426 le32_to_cpu(te_cmd->duration)); 427 428 spin_lock_bh(&mvm->time_event_lock); 429 if (WARN_ON(te_data->id != TE_MAX)) { 430 spin_unlock_bh(&mvm->time_event_lock); 431 return -EIO; 432 } 433 te_data->vif = vif; 434 te_data->duration = le32_to_cpu(te_cmd->duration); 435 te_data->id = le32_to_cpu(te_cmd->id); 436 list_add_tail(&te_data->list, &mvm->time_event_list); 437 spin_unlock_bh(&mvm->time_event_lock); 438 439 /* 440 * Use a notification wait, which really just processes the 441 * command response and doesn't wait for anything, in order 442 * to be able to process the response and get the UID inside 443 * the RX path. Using CMD_WANT_SKB doesn't work because it 444 * stores the buffer and then wakes up this thread, by which 445 * time another notification (that the time event started) 446 * might already be processed unsuccessfully. 447 */ 448 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, 449 time_event_response, 450 ARRAY_SIZE(time_event_response), 451 iwl_mvm_time_event_response, te_data); 452 453 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 454 sizeof(*te_cmd), te_cmd); 455 if (ret) { 456 IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); 457 iwl_remove_notification(&mvm->notif_wait, &wait_time_event); 458 goto out_clear_te; 459 } 460 461 /* No need to wait for anything, so just pass 1 (0 isn't valid) */ 462 ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); 463 /* should never fail */ 464 WARN_ON_ONCE(ret); 465 466 if (ret) { 467 out_clear_te: 468 spin_lock_bh(&mvm->time_event_lock); 469 iwl_mvm_te_clear_data(mvm, te_data); 470 spin_unlock_bh(&mvm->time_event_lock); 471 } 472 return ret; 473} 474 475void iwl_mvm_protect_session(struct iwl_mvm *mvm, 476 struct ieee80211_vif *vif, 477 u32 duration, u32 min_duration, 478 u32 max_delay, bool wait_for_notif) 479{ 480 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 481 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 482 const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; 483 struct iwl_notification_wait wait_te_notif; 484 struct iwl_time_event_cmd time_cmd = {}; 485 486 lockdep_assert_held(&mvm->mutex); 487 488 if (te_data->running && 489 time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { 490 IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", 491 jiffies_to_msecs(te_data->end_jiffies - jiffies)); 492 return; 493 } 494 495 if (te_data->running) { 496 IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", 497 te_data->uid, 498 jiffies_to_msecs(te_data->end_jiffies - jiffies)); 499 /* 500 * we don't have enough time 501 * cancel the current TE and issue a new one 502 * Of course it would be better to remove the old one only 503 * when the new one is added, but we don't care if we are off 504 * channel for a bit. All we need to do, is not to return 505 * before we actually begin to be on the channel. 506 */ 507 iwl_mvm_stop_session_protection(mvm, vif); 508 } 509 510 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 511 time_cmd.id_and_color = 512 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 513 time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); 514 515 time_cmd.apply_time = 516 cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); 517 518 time_cmd.max_frags = TE_V2_FRAG_NONE; 519 time_cmd.max_delay = cpu_to_le32(max_delay); 520 /* TODO: why do we need to interval = bi if it is not periodic? */ 521 time_cmd.interval = cpu_to_le32(1); 522 time_cmd.duration = cpu_to_le32(duration); 523 time_cmd.repeat = 1; 524 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 525 TE_V2_NOTIF_HOST_EVENT_END | 526 T2_V2_START_IMMEDIATELY); 527 528 if (!wait_for_notif) { 529 iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 530 return; 531 } 532 533 /* 534 * Create notification_wait for the TIME_EVENT_NOTIFICATION to use 535 * right after we send the time event 536 */ 537 iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, 538 te_notif_response, 539 ARRAY_SIZE(te_notif_response), 540 iwl_mvm_te_notif, te_data); 541 542 /* If TE was sent OK - wait for the notification that started */ 543 if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { 544 IWL_ERR(mvm, "Failed to add TE to protect session\n"); 545 iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); 546 } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, 547 TU_TO_JIFFIES(max_delay))) { 548 IWL_ERR(mvm, "Failed to protect session until TE\n"); 549 } 550} 551 552/* 553 * Explicit request to remove a time event. The removal of a time event needs to 554 * be synchronized with the flow of a time event's end notification, which also 555 * removes the time event from the op mode data structures. 556 */ 557void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 558 struct iwl_mvm_vif *mvmvif, 559 struct iwl_mvm_time_event_data *te_data) 560{ 561 struct iwl_time_event_cmd time_cmd = {}; 562 u32 id, uid; 563 int ret; 564 565 /* 566 * It is possible that by the time we got to this point the time 567 * event was already removed. 568 */ 569 spin_lock_bh(&mvm->time_event_lock); 570 571 /* Save time event uid before clearing its data */ 572 uid = te_data->uid; 573 id = te_data->id; 574 575 /* 576 * The clear_data function handles time events that were already removed 577 */ 578 iwl_mvm_te_clear_data(mvm, te_data); 579 spin_unlock_bh(&mvm->time_event_lock); 580 581 /* 582 * It is possible that by the time we try to remove it, the time event 583 * has already ended and removed. In such a case there is no need to 584 * send a removal command. 585 */ 586 if (id == TE_MAX) { 587 IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", uid); 588 return; 589 } 590 591 /* When we remove a TE, the UID is to be set in the id field */ 592 time_cmd.id = cpu_to_le32(uid); 593 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 594 time_cmd.id_and_color = 595 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 596 597 IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); 598 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 599 sizeof(time_cmd), &time_cmd); 600 if (WARN_ON(ret)) 601 return; 602} 603 604void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, 605 struct ieee80211_vif *vif) 606{ 607 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 608 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 609 610 lockdep_assert_held(&mvm->mutex); 611 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 612} 613 614int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 615 int duration, enum ieee80211_roc_type type) 616{ 617 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 618 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 619 struct iwl_time_event_cmd time_cmd = {}; 620 621 lockdep_assert_held(&mvm->mutex); 622 if (te_data->running) { 623 IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); 624 return -EBUSY; 625 } 626 627 /* 628 * Flush the done work, just in case it's still pending, so that 629 * the work it does can complete and we can accept new frames. 630 */ 631 flush_work(&mvm->roc_done_wk); 632 633 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 634 time_cmd.id_and_color = 635 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 636 637 switch (type) { 638 case IEEE80211_ROC_TYPE_NORMAL: 639 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); 640 break; 641 case IEEE80211_ROC_TYPE_MGMT_TX: 642 time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); 643 break; 644 default: 645 WARN_ONCE(1, "Got an invalid ROC type\n"); 646 return -EINVAL; 647 } 648 649 time_cmd.apply_time = cpu_to_le32(0); 650 time_cmd.interval = cpu_to_le32(1); 651 652 /* 653 * The P2P Device TEs can have lower priority than other events 654 * that are being scheduled by the driver/fw, and thus it might not be 655 * scheduled. To improve the chances of it being scheduled, allow them 656 * to be fragmented, and in addition allow them to be delayed. 657 */ 658 time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); 659 time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); 660 time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); 661 time_cmd.repeat = 1; 662 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 663 TE_V2_NOTIF_HOST_EVENT_END | 664 T2_V2_START_IMMEDIATELY); 665 666 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 667} 668 669void iwl_mvm_stop_p2p_roc(struct iwl_mvm *mvm) 670{ 671 struct iwl_mvm_vif *mvmvif; 672 struct iwl_mvm_time_event_data *te_data; 673 674 lockdep_assert_held(&mvm->mutex); 675 676 /* 677 * Iterate over the list of time events and find the time event that is 678 * associated with a P2P_DEVICE interface. 679 * This assumes that a P2P_DEVICE interface can have only a single time 680 * event at any given time and this time event coresponds to a ROC 681 * request 682 */ 683 mvmvif = NULL; 684 spin_lock_bh(&mvm->time_event_lock); 685 list_for_each_entry(te_data, &mvm->time_event_list, list) { 686 if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 687 mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); 688 break; 689 } 690 } 691 spin_unlock_bh(&mvm->time_event_lock); 692 693 if (!mvmvif) { 694 IWL_WARN(mvm, "P2P_DEVICE no remain on channel event\n"); 695 return; 696 } 697 698 iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 699 700 iwl_mvm_roc_finished(mvm); 701} 702 703int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, 704 struct ieee80211_vif *vif, 705 u32 duration, u32 apply_time) 706{ 707 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 708 struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 709 struct iwl_time_event_cmd time_cmd = {}; 710 711 lockdep_assert_held(&mvm->mutex); 712 713 if (te_data->running) { 714 IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); 715 return -EBUSY; 716 } 717 718 time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 719 time_cmd.id_and_color = 720 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 721 time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); 722 time_cmd.apply_time = cpu_to_le32(apply_time); 723 time_cmd.max_frags = TE_V2_FRAG_NONE; 724 time_cmd.duration = cpu_to_le32(duration); 725 time_cmd.repeat = 1; 726 time_cmd.interval = cpu_to_le32(1); 727 time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 728 TE_V2_ABSENCE); 729 730 return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 731} 732