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 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 37 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 68 #include <linux/etherdevice.h> 69 #include <net/mac80211.h> 70 #include "iwl-io.h" 71 #include "iwl-prph.h" 72 #include "fw-api.h" 73 #include "mvm.h" 74 #include "time-event.h" 75 76 const u8 iwl_mvm_ac_to_tx_fifo[] = { 77 IWL_MVM_TX_FIFO_VO, 78 IWL_MVM_TX_FIFO_VI, 79 IWL_MVM_TX_FIFO_BE, 80 IWL_MVM_TX_FIFO_BK, 81 }; 82 83 const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = { 84 IWL_GEN2_EDCA_TX_FIFO_VO, 85 IWL_GEN2_EDCA_TX_FIFO_VI, 86 IWL_GEN2_EDCA_TX_FIFO_BE, 87 IWL_GEN2_EDCA_TX_FIFO_BK, 88 }; 89 90 struct iwl_mvm_mac_iface_iterator_data { 91 struct iwl_mvm *mvm; 92 struct ieee80211_vif *vif; 93 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; 94 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; 95 enum iwl_tsf_id preferred_tsf; 96 bool found_vif; 97 }; 98 99 struct iwl_mvm_hw_queues_iface_iterator_data { 100 struct ieee80211_vif *exclude_vif; 101 unsigned long used_hw_queues; 102 }; 103 104 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 105 struct ieee80211_vif *vif) 106 { 107 struct iwl_mvm_mac_iface_iterator_data *data = _data; 108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 109 u16 min_bi; 110 111 /* Skip the interface for which we are trying to assign a tsf_id */ 112 if (vif == data->vif) 113 return; 114 115 /* 116 * The TSF is a hardware/firmware resource, there are 4 and 117 * the driver should assign and free them as needed. However, 118 * there are cases where 2 MACs should share the same TSF ID 119 * for the purpose of clock sync, an optimization to avoid 120 * clock drift causing overlapping TBTTs/DTIMs for a GO and 121 * client in the system. 122 * 123 * The firmware will decide according to the MAC type which 124 * will be the master and slave. Clients that need to sync 125 * with a remote station will be the master, and an AP or GO 126 * will be the slave. 127 * 128 * Depending on the new interface type it can be slaved to 129 * or become the master of an existing interface. 130 */ 131 switch (data->vif->type) { 132 case NL80211_IFTYPE_STATION: 133 /* 134 * The new interface is a client, so if the one we're iterating 135 * is an AP, and the beacon interval of the AP is a multiple or 136 * divisor of the beacon interval of the client, the same TSF 137 * should be used to avoid drift between the new client and 138 * existing AP. The existing AP will get drift updates from the 139 * new client context in this case. 140 */ 141 if (vif->type != NL80211_IFTYPE_AP || 142 data->preferred_tsf != NUM_TSF_IDS || 143 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 144 break; 145 146 min_bi = min(data->vif->bss_conf.beacon_int, 147 vif->bss_conf.beacon_int); 148 149 if (!min_bi) 150 break; 151 152 if ((data->vif->bss_conf.beacon_int - 153 vif->bss_conf.beacon_int) % min_bi == 0) { 154 data->preferred_tsf = mvmvif->tsf_id; 155 return; 156 } 157 break; 158 159 case NL80211_IFTYPE_AP: 160 /* 161 * The new interface is AP/GO, so if its beacon interval is a 162 * multiple or a divisor of the beacon interval of an existing 163 * interface, it should get drift updates from an existing 164 * client or use the same TSF as an existing GO. There's no 165 * drift between TSFs internally but if they used different 166 * TSFs then a new client MAC could update one of them and 167 * cause drift that way. 168 */ 169 if ((vif->type != NL80211_IFTYPE_AP && 170 vif->type != NL80211_IFTYPE_STATION) || 171 data->preferred_tsf != NUM_TSF_IDS || 172 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 173 break; 174 175 min_bi = min(data->vif->bss_conf.beacon_int, 176 vif->bss_conf.beacon_int); 177 178 if (!min_bi) 179 break; 180 181 if ((data->vif->bss_conf.beacon_int - 182 vif->bss_conf.beacon_int) % min_bi == 0) { 183 data->preferred_tsf = mvmvif->tsf_id; 184 return; 185 } 186 break; 187 default: 188 /* 189 * For all other interface types there's no need to 190 * take drift into account. Either they're exclusive 191 * like IBSS and monitor, or we don't care much about 192 * their TSF (like P2P Device), but we won't be able 193 * to share the TSF resource. 194 */ 195 break; 196 } 197 198 /* 199 * Unless we exited above, we can't share the TSF resource 200 * that the virtual interface we're iterating over is using 201 * with the new one, so clear the available bit and if this 202 * was the preferred one, reset that as well. 203 */ 204 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 205 206 if (data->preferred_tsf == mvmvif->tsf_id) 207 data->preferred_tsf = NUM_TSF_IDS; 208 } 209 210 /* 211 * Get the mask of the queues used by the vif 212 */ 213 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif) 214 { 215 u32 qmask = 0, ac; 216 217 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 218 return BIT(IWL_MVM_OFFCHANNEL_QUEUE); 219 220 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 221 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 222 qmask |= BIT(vif->hw_queue[ac]); 223 } 224 225 if (vif->type == NL80211_IFTYPE_AP || 226 vif->type == NL80211_IFTYPE_ADHOC) 227 qmask |= BIT(vif->cab_queue); 228 229 return qmask; 230 } 231 232 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, 233 struct ieee80211_vif *vif) 234 { 235 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 236 237 /* exclude the given vif */ 238 if (vif == data->exclude_vif) 239 return; 240 241 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); 242 } 243 244 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, 245 struct ieee80211_vif *exclude_vif) 246 { 247 struct iwl_mvm_hw_queues_iface_iterator_data data = { 248 .exclude_vif = exclude_vif, 249 .used_hw_queues = 250 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 251 BIT(mvm->aux_queue) | 252 BIT(IWL_MVM_DQA_GCAST_QUEUE), 253 }; 254 255 lockdep_assert_held(&mvm->mutex); 256 257 /* mark all VIF used hw queues */ 258 ieee80211_iterate_active_interfaces_atomic( 259 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 260 iwl_mvm_iface_hw_queues_iter, &data); 261 262 return data.used_hw_queues; 263 } 264 265 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 266 struct ieee80211_vif *vif) 267 { 268 struct iwl_mvm_mac_iface_iterator_data *data = _data; 269 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 270 271 /* Iterator may already find the interface being added -- skip it */ 272 if (vif == data->vif) { 273 data->found_vif = true; 274 return; 275 } 276 277 /* Mark MAC IDs as used by clearing the available bit, and 278 * (below) mark TSFs as used if their existing use is not 279 * compatible with the new interface type. 280 * No locking or atomic bit operations are needed since the 281 * data is on the stack of the caller function. 282 */ 283 __clear_bit(mvmvif->id, data->available_mac_ids); 284 285 /* find a suitable tsf_id */ 286 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 287 } 288 289 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 290 struct ieee80211_vif *vif) 291 { 292 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 293 struct iwl_mvm_mac_iface_iterator_data data = { 294 .mvm = mvm, 295 .vif = vif, 296 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 297 /* no preference yet */ 298 .preferred_tsf = NUM_TSF_IDS, 299 }; 300 301 ieee80211_iterate_active_interfaces_atomic( 302 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 303 iwl_mvm_mac_tsf_id_iter, &data); 304 305 if (data.preferred_tsf != NUM_TSF_IDS) 306 mvmvif->tsf_id = data.preferred_tsf; 307 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 308 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 309 NUM_TSF_IDS); 310 } 311 312 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 313 { 314 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 315 struct iwl_mvm_mac_iface_iterator_data data = { 316 .mvm = mvm, 317 .vif = vif, 318 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 319 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 320 /* no preference yet */ 321 .preferred_tsf = NUM_TSF_IDS, 322 .found_vif = false, 323 }; 324 u32 ac; 325 int ret, i, queue_limit; 326 unsigned long used_hw_queues; 327 328 lockdep_assert_held(&mvm->mutex); 329 330 /* 331 * Allocate a MAC ID and a TSF for this MAC, along with the queues 332 * and other resources. 333 */ 334 335 /* 336 * Before the iterator, we start with all MAC IDs and TSFs available. 337 * 338 * During iteration, all MAC IDs are cleared that are in use by other 339 * virtual interfaces, and all TSF IDs are cleared that can't be used 340 * by this new virtual interface because they're used by an interface 341 * that can't share it with the new one. 342 * At the same time, we check if there's a preferred TSF in the case 343 * that we should share it with another interface. 344 */ 345 346 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 347 switch (vif->type) { 348 case NL80211_IFTYPE_ADHOC: 349 break; 350 case NL80211_IFTYPE_STATION: 351 if (!vif->p2p) 352 break; 353 /* fall through */ 354 default: 355 __clear_bit(0, data.available_mac_ids); 356 } 357 358 ieee80211_iterate_active_interfaces_atomic( 359 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 360 iwl_mvm_mac_iface_iterator, &data); 361 362 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 363 364 /* 365 * In the case we're getting here during resume, it's similar to 366 * firmware restart, and with RESUME_ALL the iterator will find 367 * the vif being added already. 368 * We don't want to reassign any IDs in either case since doing 369 * so would probably assign different IDs (as interfaces aren't 370 * necessarily added in the same order), but the old IDs were 371 * preserved anyway, so skip ID assignment for both resume and 372 * recovery. 373 */ 374 if (data.found_vif) 375 return 0; 376 377 /* Therefore, in recovery, we can't get here */ 378 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 379 return -EBUSY; 380 381 mvmvif->id = find_first_bit(data.available_mac_ids, 382 NUM_MAC_INDEX_DRIVER); 383 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 384 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 385 ret = -EIO; 386 goto exit_fail; 387 } 388 389 if (data.preferred_tsf != NUM_TSF_IDS) 390 mvmvif->tsf_id = data.preferred_tsf; 391 else 392 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 393 NUM_TSF_IDS); 394 if (mvmvif->tsf_id == NUM_TSF_IDS) { 395 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 396 ret = -EIO; 397 goto exit_fail; 398 } 399 400 mvmvif->color = 0; 401 402 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 403 mvmvif->time_event_data.id = TE_MAX; 404 405 /* No need to allocate data queues to P2P Device MAC.*/ 406 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 407 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 408 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 409 410 return 0; 411 } 412 413 /* 414 * queues in mac80211 almost entirely independent of 415 * the ones here - no real limit 416 */ 417 queue_limit = IEEE80211_MAX_QUEUES; 418 BUILD_BUG_ON(IEEE80211_MAX_QUEUES > 419 BITS_PER_BYTE * 420 sizeof(mvm->hw_queue_to_mac80211[0])); 421 422 /* 423 * Find available queues, and allocate them to the ACs. When in 424 * DQA-mode they aren't really used, and this is done only so the 425 * mac80211 ieee80211_check_queues() function won't fail 426 */ 427 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 428 u8 queue = find_first_zero_bit(&used_hw_queues, queue_limit); 429 430 if (queue >= queue_limit) { 431 IWL_ERR(mvm, "Failed to allocate queue\n"); 432 ret = -EIO; 433 goto exit_fail; 434 } 435 436 __set_bit(queue, &used_hw_queues); 437 vif->hw_queue[ac] = queue; 438 } 439 440 /* Allocate the CAB queue for softAP and GO interfaces */ 441 if (vif->type == NL80211_IFTYPE_AP) { 442 /* 443 * For TVQM this will be overwritten later with the FW assigned 444 * queue value (when queue is enabled). 445 */ 446 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 447 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 448 } else { 449 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 450 } 451 452 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA; 453 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA; 454 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 455 456 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 457 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 458 459 return 0; 460 461 exit_fail: 462 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 463 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 464 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 465 return ret; 466 } 467 468 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 469 struct ieee80211_vif *vif, 470 enum nl80211_band band, 471 u8 *cck_rates, u8 *ofdm_rates) 472 { 473 struct ieee80211_supported_band *sband; 474 unsigned long basic = vif->bss_conf.basic_rates; 475 int lowest_present_ofdm = 100; 476 int lowest_present_cck = 100; 477 u8 cck = 0; 478 u8 ofdm = 0; 479 int i; 480 481 sband = mvm->hw->wiphy->bands[band]; 482 483 for_each_set_bit(i, &basic, BITS_PER_LONG) { 484 int hw = sband->bitrates[i].hw_value; 485 if (hw >= IWL_FIRST_OFDM_RATE) { 486 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 487 if (lowest_present_ofdm > hw) 488 lowest_present_ofdm = hw; 489 } else { 490 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 491 492 cck |= BIT(hw); 493 if (lowest_present_cck > hw) 494 lowest_present_cck = hw; 495 } 496 } 497 498 /* 499 * Now we've got the basic rates as bitmaps in the ofdm and cck 500 * variables. This isn't sufficient though, as there might not 501 * be all the right rates in the bitmap. E.g. if the only basic 502 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 503 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 504 * 505 * [...] a STA responding to a received frame shall transmit 506 * its Control Response frame [...] at the highest rate in the 507 * BSSBasicRateSet parameter that is less than or equal to the 508 * rate of the immediately previous frame in the frame exchange 509 * sequence ([...]) and that is of the same modulation class 510 * ([...]) as the received frame. If no rate contained in the 511 * BSSBasicRateSet parameter meets these conditions, then the 512 * control frame sent in response to a received frame shall be 513 * transmitted at the highest mandatory rate of the PHY that is 514 * less than or equal to the rate of the received frame, and 515 * that is of the same modulation class as the received frame. 516 * 517 * As a consequence, we need to add all mandatory rates that are 518 * lower than all of the basic rates to these bitmaps. 519 */ 520 521 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 522 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 523 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 524 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 525 /* 6M already there or needed so always add */ 526 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 527 528 /* 529 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 530 * Note, however: 531 * - if no CCK rates are basic, it must be ERP since there must 532 * be some basic rates at all, so they're OFDM => ERP PHY 533 * (or we're in 5 GHz, and the cck bitmap will never be used) 534 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 535 * - if 5.5M is basic, 1M and 2M are mandatory 536 * - if 2M is basic, 1M is mandatory 537 * - if 1M is basic, that's the only valid ACK rate. 538 * As a consequence, it's not as complicated as it sounds, just add 539 * any lower rates to the ACK rate bitmap. 540 */ 541 if (IWL_RATE_11M_INDEX < lowest_present_cck) 542 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 543 if (IWL_RATE_5M_INDEX < lowest_present_cck) 544 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 545 if (IWL_RATE_2M_INDEX < lowest_present_cck) 546 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 547 /* 1M already there or needed so always add */ 548 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 549 550 *cck_rates = cck; 551 *ofdm_rates = ofdm; 552 } 553 554 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 555 struct ieee80211_vif *vif, 556 struct iwl_mac_ctx_cmd *cmd) 557 { 558 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 559 u8 protection_mode = vif->bss_conf.ht_operation_mode & 560 IEEE80211_HT_OP_MODE_PROTECTION; 561 /* The fw does not distinguish between ht and fat */ 562 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 563 564 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 565 /* 566 * See section 9.23.3.1 of IEEE 80211-2012. 567 * Nongreenfield HT STAs Present is not supported. 568 */ 569 switch (protection_mode) { 570 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 571 break; 572 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 573 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 574 cmd->protection_flags |= cpu_to_le32(ht_flag); 575 break; 576 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 577 /* Protect when channel wider than 20MHz */ 578 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 579 cmd->protection_flags |= cpu_to_le32(ht_flag); 580 break; 581 default: 582 IWL_ERR(mvm, "Illegal protection mode %d\n", 583 protection_mode); 584 break; 585 } 586 } 587 588 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 589 struct ieee80211_vif *vif, 590 struct iwl_mac_ctx_cmd *cmd, 591 const u8 *bssid_override, 592 u32 action) 593 { 594 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 595 struct ieee80211_chanctx_conf *chanctx; 596 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 597 IEEE80211_HT_OP_MODE_PROTECTION); 598 u8 cck_ack_rates, ofdm_ack_rates; 599 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 600 int i; 601 602 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 603 mvmvif->color)); 604 cmd->action = cpu_to_le32(action); 605 606 switch (vif->type) { 607 case NL80211_IFTYPE_STATION: 608 if (vif->p2p) 609 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 610 else 611 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 612 break; 613 case NL80211_IFTYPE_AP: 614 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 615 break; 616 case NL80211_IFTYPE_MONITOR: 617 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 618 break; 619 case NL80211_IFTYPE_P2P_DEVICE: 620 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 621 break; 622 case NL80211_IFTYPE_ADHOC: 623 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 624 break; 625 default: 626 WARN_ON_ONCE(1); 627 } 628 629 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 630 631 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 632 633 if (bssid) 634 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 635 else 636 eth_broadcast_addr(cmd->bssid_addr); 637 638 rcu_read_lock(); 639 chanctx = rcu_dereference(vif->chanctx_conf); 640 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 641 : NL80211_BAND_2GHZ, 642 &cck_ack_rates, &ofdm_ack_rates); 643 rcu_read_unlock(); 644 645 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 646 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 647 648 cmd->cck_short_preamble = 649 cpu_to_le32(vif->bss_conf.use_short_preamble ? 650 MAC_FLG_SHORT_PREAMBLE : 0); 651 cmd->short_slot = 652 cpu_to_le32(vif->bss_conf.use_short_slot ? 653 MAC_FLG_SHORT_SLOT : 0); 654 655 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 656 657 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 658 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i); 659 660 cmd->ac[txf].cw_min = 661 cpu_to_le16(mvmvif->queue_params[i].cw_min); 662 cmd->ac[txf].cw_max = 663 cpu_to_le16(mvmvif->queue_params[i].cw_max); 664 cmd->ac[txf].edca_txop = 665 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 666 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 667 cmd->ac[txf].fifos_mask = BIT(txf); 668 } 669 670 if (vif->bss_conf.qos) 671 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 672 673 if (vif->bss_conf.use_cts_prot) 674 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 675 676 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 677 vif->bss_conf.use_cts_prot, 678 vif->bss_conf.ht_operation_mode); 679 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 680 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 681 if (ht_enabled) 682 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 683 } 684 685 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 686 struct iwl_mac_ctx_cmd *cmd) 687 { 688 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 689 sizeof(*cmd), cmd); 690 if (ret) 691 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 692 le32_to_cpu(cmd->action), ret); 693 return ret; 694 } 695 696 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 697 struct ieee80211_vif *vif, 698 u32 action, bool force_assoc_off, 699 const u8 *bssid_override) 700 { 701 struct iwl_mac_ctx_cmd cmd = {}; 702 struct iwl_mac_data_sta *ctxt_sta; 703 704 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 705 706 /* Fill the common data for all mac context types */ 707 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 708 709 if (vif->p2p) { 710 struct ieee80211_p2p_noa_attr *noa = 711 &vif->bss_conf.p2p_noa_attr; 712 713 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 714 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 715 ctxt_sta = &cmd.p2p_sta.sta; 716 } else { 717 ctxt_sta = &cmd.sta; 718 } 719 720 /* We need the dtim_period to set the MAC as associated */ 721 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 722 !force_assoc_off) { 723 u32 dtim_offs; 724 725 /* 726 * The DTIM count counts down, so when it is N that means N 727 * more beacon intervals happen until the DTIM TBTT. Therefore 728 * add this to the current time. If that ends up being in the 729 * future, the firmware will handle it. 730 * 731 * Also note that the system_timestamp (which we get here as 732 * "sync_device_ts") and TSF timestamp aren't at exactly the 733 * same offset in the frame -- the TSF is at the first symbol 734 * of the TSF, the system timestamp is at signal acquisition 735 * time. This means there's an offset between them of at most 736 * a few hundred microseconds (24 * 8 bits + PLCP time gives 737 * 384us in the longest case), this is currently not relevant 738 * as the firmware wakes up around 2ms before the TBTT. 739 */ 740 dtim_offs = vif->bss_conf.sync_dtim_count * 741 vif->bss_conf.beacon_int; 742 /* convert TU to usecs */ 743 dtim_offs *= 1024; 744 745 ctxt_sta->dtim_tsf = 746 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 747 ctxt_sta->dtim_time = 748 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 749 ctxt_sta->assoc_beacon_arrive_time = 750 cpu_to_le32(vif->bss_conf.sync_device_ts); 751 752 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 753 le64_to_cpu(ctxt_sta->dtim_tsf), 754 le32_to_cpu(ctxt_sta->dtim_time), 755 dtim_offs); 756 757 ctxt_sta->is_assoc = cpu_to_le32(1); 758 } else { 759 ctxt_sta->is_assoc = cpu_to_le32(0); 760 761 /* Allow beacons to pass through as long as we are not 762 * associated, or we do not have dtim period information. 763 */ 764 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 765 } 766 767 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 768 ctxt_sta->bi_reciprocal = 769 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 770 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 771 vif->bss_conf.dtim_period); 772 ctxt_sta->dtim_reciprocal = 773 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 774 vif->bss_conf.dtim_period)); 775 776 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 777 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 778 779 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 780 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 781 782 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 783 } 784 785 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 786 struct ieee80211_vif *vif, 787 u32 action) 788 { 789 struct iwl_mac_ctx_cmd cmd = {}; 790 u32 tfd_queue_msk = 0; 791 int ret; 792 793 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 794 795 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 796 797 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 798 MAC_FILTER_IN_CONTROL_AND_MGMT | 799 MAC_FILTER_IN_BEACON | 800 MAC_FILTER_IN_PROBE_REQUEST | 801 MAC_FILTER_IN_CRC32); 802 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 803 804 /* Allocate sniffer station */ 805 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 806 vif->type, IWL_STA_GENERAL_PURPOSE); 807 if (ret) 808 return ret; 809 810 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 811 } 812 813 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 814 struct ieee80211_vif *vif, 815 u32 action) 816 { 817 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 818 struct iwl_mac_ctx_cmd cmd = {}; 819 820 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 821 822 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 823 824 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 825 MAC_FILTER_IN_PROBE_REQUEST); 826 827 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 828 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 829 cmd.ibss.bi_reciprocal = 830 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 831 832 /* TODO: Assumes that the beacon id == mac context id */ 833 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 834 835 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 836 } 837 838 struct iwl_mvm_go_iterator_data { 839 bool go_active; 840 }; 841 842 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 843 { 844 struct iwl_mvm_go_iterator_data *data = _data; 845 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 846 847 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 848 mvmvif->ap_ibss_active) 849 data->go_active = true; 850 } 851 852 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 853 struct ieee80211_vif *vif, 854 u32 action) 855 { 856 struct iwl_mac_ctx_cmd cmd = {}; 857 struct iwl_mvm_go_iterator_data data = {}; 858 859 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 860 861 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 862 863 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 864 865 /* Override the filter flags to accept only probe requests */ 866 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 867 868 /* 869 * This flag should be set to true when the P2P Device is 870 * discoverable and there is at least another active P2P GO. Settings 871 * this flag will allow the P2P Device to be discoverable on other 872 * channels in addition to its listen channel. 873 * Note that this flag should not be set in other cases as it opens the 874 * Rx filters on all MAC and increases the number of interrupts. 875 */ 876 ieee80211_iterate_active_interfaces_atomic( 877 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 878 iwl_mvm_go_iterator, &data); 879 880 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 881 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 882 } 883 884 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 885 __le32 *tim_index, __le32 *tim_size, 886 u8 *beacon, u32 frame_size) 887 { 888 u32 tim_idx; 889 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 890 891 /* The index is relative to frame start but we start looking at the 892 * variable-length part of the beacon. */ 893 tim_idx = mgmt->u.beacon.variable - beacon; 894 895 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 896 while ((tim_idx < (frame_size - 2)) && 897 (beacon[tim_idx] != WLAN_EID_TIM)) 898 tim_idx += beacon[tim_idx+1] + 2; 899 900 /* If TIM field was found, set variables */ 901 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 902 *tim_index = cpu_to_le32(tim_idx); 903 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 904 } else { 905 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 906 } 907 } 908 909 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 910 { 911 struct ieee80211_mgmt *mgmt = (void *)beacon; 912 const u8 *ie; 913 914 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 915 return 0; 916 917 frame_size -= mgmt->u.beacon.variable - beacon; 918 919 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 920 if (!ie) 921 return 0; 922 923 return ie - beacon; 924 } 925 926 static u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info, 927 struct ieee80211_vif *vif) 928 { 929 u8 rate; 930 931 if (info->band == NL80211_BAND_5GHZ || vif->p2p) 932 rate = IWL_FIRST_OFDM_RATE; 933 else 934 rate = IWL_FIRST_CCK_RATE; 935 936 return rate; 937 } 938 939 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm, 940 struct ieee80211_vif *vif, 941 struct sk_buff *beacon, 942 struct iwl_tx_cmd *tx) 943 { 944 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 945 struct ieee80211_tx_info *info; 946 u8 rate; 947 u32 tx_flags; 948 949 info = IEEE80211_SKB_CB(beacon); 950 951 /* Set up TX command fields */ 952 tx->len = cpu_to_le16((u16)beacon->len); 953 tx->sta_id = mvmvif->bcast_sta.sta_id; 954 tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 955 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 956 tx_flags |= 957 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 958 TX_CMD_FLG_BT_PRIO_POS; 959 tx->tx_flags = cpu_to_le32(tx_flags); 960 961 if (!fw_has_capa(&mvm->fw->ucode_capa, 962 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 963 mvm->mgmt_last_antenna_idx = 964 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 965 mvm->mgmt_last_antenna_idx); 966 } 967 968 tx->rate_n_flags = 969 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 970 RATE_MCS_ANT_POS); 971 972 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif); 973 974 tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 975 if (rate == IWL_FIRST_CCK_RATE) 976 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); 977 978 } 979 980 static int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm, 981 struct sk_buff *beacon, 982 void *data, int len) 983 { 984 struct iwl_host_cmd cmd = { 985 .id = BEACON_TEMPLATE_CMD, 986 .flags = CMD_ASYNC, 987 }; 988 989 cmd.len[0] = len; 990 cmd.data[0] = data; 991 cmd.dataflags[0] = 0; 992 cmd.len[1] = beacon->len; 993 cmd.data[1] = beacon->data; 994 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 995 996 return iwl_mvm_send_cmd(mvm, &cmd); 997 } 998 999 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm, 1000 struct ieee80211_vif *vif, 1001 struct sk_buff *beacon) 1002 { 1003 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1004 struct iwl_mac_beacon_cmd_v6 beacon_cmd = {}; 1005 1006 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); 1007 1008 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1009 1010 if (vif->type == NL80211_IFTYPE_AP) 1011 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 1012 &beacon_cmd.tim_size, 1013 beacon->data, beacon->len); 1014 1015 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 1016 sizeof(beacon_cmd)); 1017 } 1018 1019 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm, 1020 struct ieee80211_vif *vif, 1021 struct sk_buff *beacon) 1022 { 1023 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1024 struct iwl_mac_beacon_cmd_v7 beacon_cmd = {}; 1025 1026 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); 1027 1028 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1029 1030 if (vif->type == NL80211_IFTYPE_AP) 1031 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 1032 &beacon_cmd.tim_size, 1033 beacon->data, beacon->len); 1034 1035 beacon_cmd.csa_offset = 1036 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1037 WLAN_EID_CHANNEL_SWITCH, 1038 beacon->len)); 1039 beacon_cmd.ecsa_offset = 1040 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1041 WLAN_EID_EXT_CHANSWITCH_ANN, 1042 beacon->len)); 1043 1044 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 1045 sizeof(beacon_cmd)); 1046 } 1047 1048 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm, 1049 struct ieee80211_vif *vif, 1050 struct sk_buff *beacon) 1051 { 1052 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1053 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon); 1054 struct iwl_mac_beacon_cmd beacon_cmd = {}; 1055 u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif); 1056 u16 flags; 1057 1058 flags = iwl_mvm_mac80211_idx_to_hwrate(rate); 1059 1060 if (rate == IWL_FIRST_CCK_RATE) 1061 flags |= IWL_MAC_BEACON_CCK; 1062 1063 beacon_cmd.flags = cpu_to_le16(flags); 1064 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len); 1065 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1066 1067 if (vif->type == NL80211_IFTYPE_AP) 1068 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 1069 &beacon_cmd.tim_size, 1070 beacon->data, beacon->len); 1071 1072 beacon_cmd.csa_offset = 1073 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1074 WLAN_EID_CHANNEL_SWITCH, 1075 beacon->len)); 1076 beacon_cmd.ecsa_offset = 1077 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1078 WLAN_EID_EXT_CHANSWITCH_ANN, 1079 beacon->len)); 1080 1081 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 1082 sizeof(beacon_cmd)); 1083 } 1084 1085 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 1086 struct ieee80211_vif *vif, 1087 struct sk_buff *beacon) 1088 { 1089 if (WARN_ON(!beacon)) 1090 return -EINVAL; 1091 1092 if (!fw_has_capa(&mvm->fw->ucode_capa, 1093 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) 1094 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon); 1095 1096 if (fw_has_api(&mvm->fw->ucode_capa, 1097 IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE)) 1098 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon); 1099 1100 return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon); 1101 } 1102 1103 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1104 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1105 struct ieee80211_vif *vif) 1106 { 1107 struct sk_buff *beacon; 1108 int ret; 1109 1110 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1111 vif->type != NL80211_IFTYPE_ADHOC); 1112 1113 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1114 if (!beacon) 1115 return -ENOMEM; 1116 1117 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1118 dev_kfree_skb(beacon); 1119 return ret; 1120 } 1121 1122 struct iwl_mvm_mac_ap_iterator_data { 1123 struct iwl_mvm *mvm; 1124 struct ieee80211_vif *vif; 1125 u32 beacon_device_ts; 1126 u16 beacon_int; 1127 }; 1128 1129 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1130 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1131 struct ieee80211_vif *vif) 1132 { 1133 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1134 1135 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1136 return; 1137 1138 /* Station client has higher priority over P2P client*/ 1139 if (vif->p2p && data->beacon_device_ts) 1140 return; 1141 1142 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1143 data->beacon_int = vif->bss_conf.beacon_int; 1144 } 1145 1146 /* 1147 * Fill the specific data for mac context of type AP of P2P GO 1148 */ 1149 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1150 struct ieee80211_vif *vif, 1151 struct iwl_mac_ctx_cmd *cmd, 1152 struct iwl_mac_data_ap *ctxt_ap, 1153 bool add) 1154 { 1155 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1156 struct iwl_mvm_mac_ap_iterator_data data = { 1157 .mvm = mvm, 1158 .vif = vif, 1159 .beacon_device_ts = 0 1160 }; 1161 1162 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1163 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1164 1165 /* 1166 * in AP mode, pass probe requests and beacons from other APs 1167 * (needed for ht protection); when there're no any associated 1168 * station don't ask FW to pass beacons to prevent unnecessary 1169 * wake-ups. 1170 */ 1171 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1172 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1173 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1174 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1175 } else { 1176 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1177 } 1178 1179 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1180 ctxt_ap->bi_reciprocal = 1181 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1182 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1183 vif->bss_conf.dtim_period); 1184 ctxt_ap->dtim_reciprocal = 1185 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1186 vif->bss_conf.dtim_period)); 1187 1188 if (!fw_has_api(&mvm->fw->ucode_capa, 1189 IWL_UCODE_TLV_API_STA_TYPE)) 1190 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1191 1192 /* 1193 * Only set the beacon time when the MAC is being added, when we 1194 * just modify the MAC then we should keep the time -- the firmware 1195 * can otherwise have a "jumping" TBTT. 1196 */ 1197 if (add) { 1198 /* 1199 * If there is a station/P2P client interface which is 1200 * associated, set the AP's TBTT far enough from the station's 1201 * TBTT. Otherwise, set it to the current system time 1202 */ 1203 ieee80211_iterate_active_interfaces_atomic( 1204 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1205 iwl_mvm_mac_ap_iterator, &data); 1206 1207 if (data.beacon_device_ts) { 1208 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1209 mvmvif->ap_beacon_time = data.beacon_device_ts + 1210 ieee80211_tu_to_usec(data.beacon_int * rand / 1211 100); 1212 } else { 1213 mvmvif->ap_beacon_time = 1214 iwl_read_prph(mvm->trans, 1215 DEVICE_SYSTEM_TIME_REG); 1216 } 1217 } 1218 1219 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1220 ctxt_ap->beacon_tsf = 0; /* unused */ 1221 1222 /* TODO: Assume that the beacon id == mac context id */ 1223 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1224 } 1225 1226 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1227 struct ieee80211_vif *vif, 1228 u32 action) 1229 { 1230 struct iwl_mac_ctx_cmd cmd = {}; 1231 1232 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1233 1234 /* Fill the common data for all mac context types */ 1235 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1236 1237 /* Fill the data specific for ap mode */ 1238 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1239 action == FW_CTXT_ACTION_ADD); 1240 1241 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1242 } 1243 1244 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1245 struct ieee80211_vif *vif, 1246 u32 action) 1247 { 1248 struct iwl_mac_ctx_cmd cmd = {}; 1249 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1250 1251 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1252 1253 /* Fill the common data for all mac context types */ 1254 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1255 1256 /* Fill the data specific for GO mode */ 1257 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1258 action == FW_CTXT_ACTION_ADD); 1259 1260 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1261 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1262 cmd.go.opp_ps_enabled = 1263 cpu_to_le32(!!(noa->oppps_ctwindow & 1264 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1265 1266 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1267 } 1268 1269 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1270 u32 action, bool force_assoc_off, 1271 const u8 *bssid_override) 1272 { 1273 switch (vif->type) { 1274 case NL80211_IFTYPE_STATION: 1275 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1276 force_assoc_off, 1277 bssid_override); 1278 break; 1279 case NL80211_IFTYPE_AP: 1280 if (!vif->p2p) 1281 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1282 else 1283 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1284 break; 1285 case NL80211_IFTYPE_MONITOR: 1286 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1287 case NL80211_IFTYPE_P2P_DEVICE: 1288 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1289 case NL80211_IFTYPE_ADHOC: 1290 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1291 default: 1292 break; 1293 } 1294 1295 return -EOPNOTSUPP; 1296 } 1297 1298 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1299 { 1300 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1301 int ret; 1302 1303 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1304 vif->addr, ieee80211_vif_type_p2p(vif))) 1305 return -EIO; 1306 1307 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1308 true, NULL); 1309 if (ret) 1310 return ret; 1311 1312 /* will only do anything at resume from D3 time */ 1313 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1314 1315 mvmvif->uploaded = true; 1316 return 0; 1317 } 1318 1319 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1320 bool force_assoc_off, const u8 *bssid_override) 1321 { 1322 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1323 1324 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1325 vif->addr, ieee80211_vif_type_p2p(vif))) 1326 return -EIO; 1327 1328 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1329 force_assoc_off, bssid_override); 1330 } 1331 1332 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1333 { 1334 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1335 struct iwl_mac_ctx_cmd cmd; 1336 int ret; 1337 1338 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1339 vif->addr, ieee80211_vif_type_p2p(vif))) 1340 return -EIO; 1341 1342 memset(&cmd, 0, sizeof(cmd)); 1343 1344 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1345 mvmvif->color)); 1346 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1347 1348 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1349 sizeof(cmd), &cmd); 1350 if (ret) { 1351 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1352 return ret; 1353 } 1354 1355 mvmvif->uploaded = false; 1356 1357 if (vif->type == NL80211_IFTYPE_MONITOR) { 1358 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1359 iwl_mvm_dealloc_snif_sta(mvm); 1360 } 1361 1362 return 0; 1363 } 1364 1365 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1366 struct ieee80211_vif *csa_vif, u32 gp2, 1367 bool tx_success) 1368 { 1369 struct iwl_mvm_vif *mvmvif = 1370 iwl_mvm_vif_from_mac80211(csa_vif); 1371 1372 /* Don't start to countdown from a failed beacon */ 1373 if (!tx_success && !mvmvif->csa_countdown) 1374 return; 1375 1376 mvmvif->csa_countdown = true; 1377 1378 if (!ieee80211_csa_is_complete(csa_vif)) { 1379 int c = ieee80211_csa_update_counter(csa_vif); 1380 1381 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1382 if (csa_vif->p2p && 1383 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1384 tx_success) { 1385 u32 rel_time = (c + 1) * 1386 csa_vif->bss_conf.beacon_int - 1387 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1388 u32 apply_time = gp2 + rel_time * 1024; 1389 1390 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1391 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1392 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1393 apply_time); 1394 } 1395 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1396 /* we don't have CSA NoA scheduled yet, switch now */ 1397 ieee80211_csa_finish(csa_vif); 1398 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1399 } 1400 } 1401 1402 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1403 struct iwl_rx_cmd_buffer *rxb) 1404 { 1405 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1406 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1407 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1408 struct ieee80211_vif *csa_vif; 1409 struct ieee80211_vif *tx_blocked_vif; 1410 struct agg_tx_status *agg_status; 1411 u16 status; 1412 1413 lockdep_assert_held(&mvm->mutex); 1414 1415 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1416 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1417 mvm->ibss_manager = beacon->ibss_mgr_status != 0; 1418 1419 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr); 1420 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK; 1421 IWL_DEBUG_RX(mvm, 1422 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1423 status, beacon_notify_hdr->failure_frame, 1424 le64_to_cpu(beacon->tsf), 1425 mvm->ap_last_beacon_gp2, 1426 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1427 1428 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1429 lockdep_is_held(&mvm->mutex)); 1430 if (unlikely(csa_vif && csa_vif->csa_active)) 1431 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1432 (status == TX_STATUS_SUCCESS)); 1433 1434 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1435 lockdep_is_held(&mvm->mutex)); 1436 if (unlikely(tx_blocked_vif)) { 1437 struct iwl_mvm_vif *mvmvif = 1438 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1439 1440 /* 1441 * The channel switch is started and we have blocked the 1442 * stations. If this is the first beacon (the timeout wasn't 1443 * set), set the unblock timeout, otherwise countdown 1444 */ 1445 if (!mvm->csa_tx_block_bcn_timeout) 1446 mvm->csa_tx_block_bcn_timeout = 1447 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1448 else 1449 mvm->csa_tx_block_bcn_timeout--; 1450 1451 /* Check if the timeout is expired, and unblock tx */ 1452 if (mvm->csa_tx_block_bcn_timeout == 0) { 1453 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1454 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1455 } 1456 } 1457 } 1458 1459 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1460 struct ieee80211_vif *vif) 1461 { 1462 struct iwl_missed_beacons_notif *missed_beacons = _data; 1463 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1464 struct iwl_mvm *mvm = mvmvif->mvm; 1465 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1466 struct iwl_fw_dbg_trigger_tlv *trigger; 1467 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1468 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1469 1470 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1471 return; 1472 1473 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1474 rx_missed_bcon_since_rx = 1475 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1476 /* 1477 * TODO: the threshold should be adjusted based on latency conditions, 1478 * and/or in case of a CS flow on one of the other AP vifs. 1479 */ 1480 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1481 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1482 ieee80211_beacon_loss(vif); 1483 1484 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1485 FW_DBG_TRIGGER_MISSED_BEACONS)) 1486 return; 1487 1488 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1489 FW_DBG_TRIGGER_MISSED_BEACONS); 1490 bcon_trig = (void *)trigger->data; 1491 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1492 stop_trig_missed_bcon_since_rx = 1493 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1494 1495 /* TODO: implement start trigger */ 1496 1497 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 1498 ieee80211_vif_to_wdev(vif), 1499 trigger)) 1500 return; 1501 1502 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1503 rx_missed_bcon >= stop_trig_missed_bcon) 1504 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL); 1505 } 1506 1507 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1508 struct iwl_rx_cmd_buffer *rxb) 1509 { 1510 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1511 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1512 1513 IWL_DEBUG_INFO(mvm, 1514 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1515 le32_to_cpu(mb->mac_id), 1516 le32_to_cpu(mb->consec_missed_beacons), 1517 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1518 le32_to_cpu(mb->num_recvd_beacons), 1519 le32_to_cpu(mb->num_expected_beacons)); 1520 1521 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1522 IEEE80211_IFACE_ITER_NORMAL, 1523 iwl_mvm_beacon_loss_iterator, 1524 mb); 1525 } 1526 1527 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1528 struct iwl_rx_cmd_buffer *rxb) 1529 { 1530 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1531 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1532 struct ieee80211_rx_status rx_status; 1533 struct sk_buff *skb; 1534 u32 size = le32_to_cpu(sb->byte_count); 1535 1536 if (size == 0) 1537 return; 1538 1539 skb = alloc_skb(size, GFP_ATOMIC); 1540 if (!skb) { 1541 IWL_ERR(mvm, "alloc_skb failed\n"); 1542 return; 1543 } 1544 1545 /* update rx_status according to the notification's metadata */ 1546 memset(&rx_status, 0, sizeof(rx_status)); 1547 rx_status.mactime = le64_to_cpu(sb->tsf); 1548 /* TSF as indicated by the firmware is at INA time */ 1549 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1550 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1551 rx_status.band = 1552 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1553 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1554 rx_status.freq = 1555 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1556 rx_status.band); 1557 1558 /* copy the data */ 1559 skb_put_data(skb, sb->data, size); 1560 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1561 1562 /* pass it as regular rx to mac80211 */ 1563 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1564 } 1565 1566 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1567 struct iwl_rx_cmd_buffer *rxb) 1568 { 1569 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1570 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1571 struct ieee80211_vif *csa_vif; 1572 struct iwl_mvm_vif *mvmvif; 1573 int len = iwl_rx_packet_payload_len(pkt); 1574 u32 id_n_color; 1575 1576 if (WARN_ON_ONCE(len < sizeof(*notif))) 1577 return; 1578 1579 rcu_read_lock(); 1580 1581 csa_vif = rcu_dereference(mvm->csa_vif); 1582 if (WARN_ON(!csa_vif || !csa_vif->csa_active)) 1583 goto out_unlock; 1584 1585 id_n_color = le32_to_cpu(notif->id_and_color); 1586 1587 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); 1588 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, 1589 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1590 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) 1591 goto out_unlock; 1592 1593 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1594 1595 schedule_delayed_work(&mvm->cs_tx_unblock_dwork, 1596 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1597 csa_vif->bss_conf.beacon_int)); 1598 1599 ieee80211_csa_finish(csa_vif); 1600 1601 rcu_read_unlock(); 1602 1603 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1604 1605 return; 1606 1607 out_unlock: 1608 rcu_read_unlock(); 1609 } 1610