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 - 2016 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 - 2016 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 #include "fw-dbg.h" 76 77 const u8 iwl_mvm_ac_to_tx_fifo[] = { 78 IWL_MVM_TX_FIFO_VO, 79 IWL_MVM_TX_FIFO_VI, 80 IWL_MVM_TX_FIFO_BE, 81 IWL_MVM_TX_FIFO_BK, 82 }; 83 84 struct iwl_mvm_mac_iface_iterator_data { 85 struct iwl_mvm *mvm; 86 struct ieee80211_vif *vif; 87 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; 88 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; 89 enum iwl_tsf_id preferred_tsf; 90 bool found_vif; 91 }; 92 93 struct iwl_mvm_hw_queues_iface_iterator_data { 94 struct ieee80211_vif *exclude_vif; 95 unsigned long used_hw_queues; 96 }; 97 98 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 99 struct ieee80211_vif *vif) 100 { 101 struct iwl_mvm_mac_iface_iterator_data *data = _data; 102 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 103 u16 min_bi; 104 105 /* Skip the interface for which we are trying to assign a tsf_id */ 106 if (vif == data->vif) 107 return; 108 109 /* 110 * The TSF is a hardware/firmware resource, there are 4 and 111 * the driver should assign and free them as needed. However, 112 * there are cases where 2 MACs should share the same TSF ID 113 * for the purpose of clock sync, an optimization to avoid 114 * clock drift causing overlapping TBTTs/DTIMs for a GO and 115 * client in the system. 116 * 117 * The firmware will decide according to the MAC type which 118 * will be the master and slave. Clients that need to sync 119 * with a remote station will be the master, and an AP or GO 120 * will be the slave. 121 * 122 * Depending on the new interface type it can be slaved to 123 * or become the master of an existing interface. 124 */ 125 switch (data->vif->type) { 126 case NL80211_IFTYPE_STATION: 127 /* 128 * The new interface is a client, so if the one we're iterating 129 * is an AP, and the beacon interval of the AP is a multiple or 130 * divisor of the beacon interval of the client, the same TSF 131 * should be used to avoid drift between the new client and 132 * existing AP. The existing AP will get drift updates from the 133 * new client context in this case. 134 */ 135 if (vif->type != NL80211_IFTYPE_AP || 136 data->preferred_tsf != NUM_TSF_IDS || 137 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 138 break; 139 140 min_bi = min(data->vif->bss_conf.beacon_int, 141 vif->bss_conf.beacon_int); 142 143 if (!min_bi) 144 break; 145 146 if ((data->vif->bss_conf.beacon_int - 147 vif->bss_conf.beacon_int) % min_bi == 0) { 148 data->preferred_tsf = mvmvif->tsf_id; 149 return; 150 } 151 break; 152 153 case NL80211_IFTYPE_AP: 154 /* 155 * The new interface is AP/GO, so if its beacon interval is a 156 * multiple or a divisor of the beacon interval of an existing 157 * interface, it should get drift updates from an existing 158 * client or use the same TSF as an existing GO. There's no 159 * drift between TSFs internally but if they used different 160 * TSFs then a new client MAC could update one of them and 161 * cause drift that way. 162 */ 163 if ((vif->type != NL80211_IFTYPE_AP && 164 vif->type != NL80211_IFTYPE_STATION) || 165 data->preferred_tsf != NUM_TSF_IDS || 166 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 167 break; 168 169 min_bi = min(data->vif->bss_conf.beacon_int, 170 vif->bss_conf.beacon_int); 171 172 if (!min_bi) 173 break; 174 175 if ((data->vif->bss_conf.beacon_int - 176 vif->bss_conf.beacon_int) % min_bi == 0) { 177 data->preferred_tsf = mvmvif->tsf_id; 178 return; 179 } 180 break; 181 default: 182 /* 183 * For all other interface types there's no need to 184 * take drift into account. Either they're exclusive 185 * like IBSS and monitor, or we don't care much about 186 * their TSF (like P2P Device), but we won't be able 187 * to share the TSF resource. 188 */ 189 break; 190 } 191 192 /* 193 * Unless we exited above, we can't share the TSF resource 194 * that the virtual interface we're iterating over is using 195 * with the new one, so clear the available bit and if this 196 * was the preferred one, reset that as well. 197 */ 198 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 199 200 if (data->preferred_tsf == mvmvif->tsf_id) 201 data->preferred_tsf = NUM_TSF_IDS; 202 } 203 204 /* 205 * Get the mask of the queues used by the vif 206 */ 207 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif) 208 { 209 u32 qmask = 0, ac; 210 211 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 212 return BIT(IWL_MVM_OFFCHANNEL_QUEUE); 213 214 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 215 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 216 qmask |= BIT(vif->hw_queue[ac]); 217 } 218 219 if (vif->type == NL80211_IFTYPE_AP || 220 vif->type == NL80211_IFTYPE_ADHOC) 221 qmask |= BIT(vif->cab_queue); 222 223 return qmask; 224 } 225 226 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, 227 struct ieee80211_vif *vif) 228 { 229 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 230 231 /* exclude the given vif */ 232 if (vif == data->exclude_vif) 233 return; 234 235 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); 236 } 237 238 static void iwl_mvm_mac_sta_hw_queues_iter(void *_data, 239 struct ieee80211_sta *sta) 240 { 241 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 242 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 243 244 /* Mark the queues used by the sta */ 245 data->used_hw_queues |= mvmsta->tfd_queue_msk; 246 } 247 248 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, 249 struct ieee80211_vif *exclude_vif) 250 { 251 u8 sta_id; 252 struct iwl_mvm_hw_queues_iface_iterator_data data = { 253 .exclude_vif = exclude_vif, 254 .used_hw_queues = 255 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 256 BIT(mvm->aux_queue), 257 }; 258 259 if (iwl_mvm_is_dqa_supported(mvm)) 260 data.used_hw_queues |= BIT(IWL_MVM_DQA_GCAST_QUEUE); 261 else 262 data.used_hw_queues |= BIT(IWL_MVM_CMD_QUEUE); 263 264 lockdep_assert_held(&mvm->mutex); 265 266 /* mark all VIF used hw queues */ 267 ieee80211_iterate_active_interfaces_atomic( 268 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 269 iwl_mvm_iface_hw_queues_iter, &data); 270 271 /* 272 * for DQA, the hw_queue in mac80211 is never really used for 273 * real traffic (only the few queue IDs covered above), so 274 * we can reuse the real HW queue IDs the stations use 275 */ 276 if (iwl_mvm_is_dqa_supported(mvm)) 277 return data.used_hw_queues; 278 279 /* don't assign the same hw queues as TDLS stations */ 280 ieee80211_iterate_stations_atomic(mvm->hw, 281 iwl_mvm_mac_sta_hw_queues_iter, 282 &data); 283 284 /* 285 * Some TDLS stations may be removed but are in the process of being 286 * drained. Don't touch their queues. 287 */ 288 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) 289 data.used_hw_queues |= mvm->tfd_drained[sta_id]; 290 291 return data.used_hw_queues; 292 } 293 294 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 295 struct ieee80211_vif *vif) 296 { 297 struct iwl_mvm_mac_iface_iterator_data *data = _data; 298 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 299 300 /* Iterator may already find the interface being added -- skip it */ 301 if (vif == data->vif) { 302 data->found_vif = true; 303 return; 304 } 305 306 /* Mark MAC IDs as used by clearing the available bit, and 307 * (below) mark TSFs as used if their existing use is not 308 * compatible with the new interface type. 309 * No locking or atomic bit operations are needed since the 310 * data is on the stack of the caller function. 311 */ 312 __clear_bit(mvmvif->id, data->available_mac_ids); 313 314 /* find a suitable tsf_id */ 315 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 316 } 317 318 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 319 struct ieee80211_vif *vif) 320 { 321 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 322 struct iwl_mvm_mac_iface_iterator_data data = { 323 .mvm = mvm, 324 .vif = vif, 325 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 326 /* no preference yet */ 327 .preferred_tsf = NUM_TSF_IDS, 328 }; 329 330 ieee80211_iterate_active_interfaces_atomic( 331 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 332 iwl_mvm_mac_tsf_id_iter, &data); 333 334 if (data.preferred_tsf != NUM_TSF_IDS) 335 mvmvif->tsf_id = data.preferred_tsf; 336 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 337 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 338 NUM_TSF_IDS); 339 } 340 341 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, 342 struct ieee80211_vif *vif) 343 { 344 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 345 struct iwl_mvm_mac_iface_iterator_data data = { 346 .mvm = mvm, 347 .vif = vif, 348 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 349 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 350 /* no preference yet */ 351 .preferred_tsf = NUM_TSF_IDS, 352 .found_vif = false, 353 }; 354 u32 ac; 355 int ret, i, queue_limit; 356 unsigned long used_hw_queues; 357 358 /* 359 * Allocate a MAC ID and a TSF for this MAC, along with the queues 360 * and other resources. 361 */ 362 363 /* 364 * Before the iterator, we start with all MAC IDs and TSFs available. 365 * 366 * During iteration, all MAC IDs are cleared that are in use by other 367 * virtual interfaces, and all TSF IDs are cleared that can't be used 368 * by this new virtual interface because they're used by an interface 369 * that can't share it with the new one. 370 * At the same time, we check if there's a preferred TSF in the case 371 * that we should share it with another interface. 372 */ 373 374 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 375 switch (vif->type) { 376 case NL80211_IFTYPE_ADHOC: 377 break; 378 case NL80211_IFTYPE_STATION: 379 if (!vif->p2p) 380 break; 381 /* fall through */ 382 default: 383 __clear_bit(0, data.available_mac_ids); 384 } 385 386 ieee80211_iterate_active_interfaces_atomic( 387 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 388 iwl_mvm_mac_iface_iterator, &data); 389 390 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 391 392 /* 393 * In the case we're getting here during resume, it's similar to 394 * firmware restart, and with RESUME_ALL the iterator will find 395 * the vif being added already. 396 * We don't want to reassign any IDs in either case since doing 397 * so would probably assign different IDs (as interfaces aren't 398 * necessarily added in the same order), but the old IDs were 399 * preserved anyway, so skip ID assignment for both resume and 400 * recovery. 401 */ 402 if (data.found_vif) 403 return 0; 404 405 /* Therefore, in recovery, we can't get here */ 406 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 407 return -EBUSY; 408 409 mvmvif->id = find_first_bit(data.available_mac_ids, 410 NUM_MAC_INDEX_DRIVER); 411 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 412 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 413 ret = -EIO; 414 goto exit_fail; 415 } 416 417 if (data.preferred_tsf != NUM_TSF_IDS) 418 mvmvif->tsf_id = data.preferred_tsf; 419 else 420 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 421 NUM_TSF_IDS); 422 if (mvmvif->tsf_id == NUM_TSF_IDS) { 423 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 424 ret = -EIO; 425 goto exit_fail; 426 } 427 428 mvmvif->color = 0; 429 430 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 431 mvmvif->time_event_data.id = TE_MAX; 432 433 /* No need to allocate data queues to P2P Device MAC.*/ 434 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 435 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 436 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 437 438 return 0; 439 } 440 441 if (iwl_mvm_is_dqa_supported(mvm)) { 442 /* 443 * queues in mac80211 almost entirely independent of 444 * the ones here - no real limit 445 */ 446 queue_limit = IEEE80211_MAX_QUEUES; 447 BUILD_BUG_ON(IEEE80211_MAX_QUEUES > 448 BITS_PER_BYTE * 449 sizeof(mvm->hw_queue_to_mac80211[0])); 450 } else { 451 /* need to not use too many in this case */ 452 queue_limit = mvm->first_agg_queue; 453 } 454 455 /* 456 * Find available queues, and allocate them to the ACs. When in 457 * DQA-mode they aren't really used, and this is done only so the 458 * mac80211 ieee80211_check_queues() function won't fail 459 */ 460 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 461 u8 queue = find_first_zero_bit(&used_hw_queues, queue_limit); 462 463 if (queue >= queue_limit) { 464 IWL_ERR(mvm, "Failed to allocate queue\n"); 465 ret = -EIO; 466 goto exit_fail; 467 } 468 469 __set_bit(queue, &used_hw_queues); 470 vif->hw_queue[ac] = queue; 471 } 472 473 /* Allocate the CAB queue for softAP and GO interfaces */ 474 if (vif->type == NL80211_IFTYPE_AP) { 475 u8 queue; 476 477 if (!iwl_mvm_is_dqa_supported(mvm)) { 478 queue = find_first_zero_bit(&used_hw_queues, 479 mvm->first_agg_queue); 480 481 if (queue >= mvm->first_agg_queue) { 482 IWL_ERR(mvm, "Failed to allocate cab queue\n"); 483 ret = -EIO; 484 goto exit_fail; 485 } 486 } else { 487 queue = IWL_MVM_DQA_GCAST_QUEUE; 488 } 489 490 /* 491 * For TVQM this will be overwritten later with the FW assigned 492 * queue value (when queue is enabled). 493 */ 494 mvmvif->cab_queue = queue; 495 vif->cab_queue = queue; 496 } else { 497 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 498 } 499 500 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA; 501 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA; 502 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 503 504 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 505 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 506 507 return 0; 508 509 exit_fail: 510 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 511 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 512 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 513 return ret; 514 } 515 516 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 517 { 518 unsigned int wdg_timeout = 519 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 520 u32 ac; 521 int ret; 522 523 lockdep_assert_held(&mvm->mutex); 524 525 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 526 if (ret) 527 return ret; 528 529 /* If DQA is supported - queues will be enabled when needed */ 530 if (iwl_mvm_is_dqa_supported(mvm)) 531 return 0; 532 533 switch (vif->type) { 534 case NL80211_IFTYPE_P2P_DEVICE: 535 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 536 IWL_MVM_OFFCHANNEL_QUEUE, 537 IWL_MVM_TX_FIFO_VO, 0, wdg_timeout); 538 break; 539 case NL80211_IFTYPE_AP: 540 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue, 541 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 542 /* fall through */ 543 default: 544 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 545 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 546 vif->hw_queue[ac], 547 iwl_mvm_ac_to_tx_fifo[ac], 0, 548 wdg_timeout); 549 break; 550 } 551 552 return 0; 553 } 554 555 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 556 { 557 int ac; 558 559 lockdep_assert_held(&mvm->mutex); 560 561 /* 562 * If DQA is supported - queues were already disabled, since in 563 * DQA-mode the queues are a property of the STA and not of the 564 * vif, and at this point the STA was already deleted 565 */ 566 if (iwl_mvm_is_dqa_supported(mvm)) 567 return; 568 569 switch (vif->type) { 570 case NL80211_IFTYPE_P2P_DEVICE: 571 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 572 IWL_MVM_OFFCHANNEL_QUEUE, 573 IWL_MAX_TID_COUNT, 0); 574 575 break; 576 case NL80211_IFTYPE_AP: 577 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, 578 IWL_MAX_TID_COUNT, 0); 579 /* fall through */ 580 default: 581 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 582 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], 583 vif->hw_queue[ac], 584 IWL_MAX_TID_COUNT, 0); 585 } 586 } 587 588 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 589 struct ieee80211_vif *vif, 590 enum nl80211_band band, 591 u8 *cck_rates, u8 *ofdm_rates) 592 { 593 struct ieee80211_supported_band *sband; 594 unsigned long basic = vif->bss_conf.basic_rates; 595 int lowest_present_ofdm = 100; 596 int lowest_present_cck = 100; 597 u8 cck = 0; 598 u8 ofdm = 0; 599 int i; 600 601 sband = mvm->hw->wiphy->bands[band]; 602 603 for_each_set_bit(i, &basic, BITS_PER_LONG) { 604 int hw = sband->bitrates[i].hw_value; 605 if (hw >= IWL_FIRST_OFDM_RATE) { 606 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 607 if (lowest_present_ofdm > hw) 608 lowest_present_ofdm = hw; 609 } else { 610 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 611 612 cck |= BIT(hw); 613 if (lowest_present_cck > hw) 614 lowest_present_cck = hw; 615 } 616 } 617 618 /* 619 * Now we've got the basic rates as bitmaps in the ofdm and cck 620 * variables. This isn't sufficient though, as there might not 621 * be all the right rates in the bitmap. E.g. if the only basic 622 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 623 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 624 * 625 * [...] a STA responding to a received frame shall transmit 626 * its Control Response frame [...] at the highest rate in the 627 * BSSBasicRateSet parameter that is less than or equal to the 628 * rate of the immediately previous frame in the frame exchange 629 * sequence ([...]) and that is of the same modulation class 630 * ([...]) as the received frame. If no rate contained in the 631 * BSSBasicRateSet parameter meets these conditions, then the 632 * control frame sent in response to a received frame shall be 633 * transmitted at the highest mandatory rate of the PHY that is 634 * less than or equal to the rate of the received frame, and 635 * that is of the same modulation class as the received frame. 636 * 637 * As a consequence, we need to add all mandatory rates that are 638 * lower than all of the basic rates to these bitmaps. 639 */ 640 641 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 642 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 643 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 644 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 645 /* 6M already there or needed so always add */ 646 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 647 648 /* 649 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 650 * Note, however: 651 * - if no CCK rates are basic, it must be ERP since there must 652 * be some basic rates at all, so they're OFDM => ERP PHY 653 * (or we're in 5 GHz, and the cck bitmap will never be used) 654 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 655 * - if 5.5M is basic, 1M and 2M are mandatory 656 * - if 2M is basic, 1M is mandatory 657 * - if 1M is basic, that's the only valid ACK rate. 658 * As a consequence, it's not as complicated as it sounds, just add 659 * any lower rates to the ACK rate bitmap. 660 */ 661 if (IWL_RATE_11M_INDEX < lowest_present_cck) 662 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 663 if (IWL_RATE_5M_INDEX < lowest_present_cck) 664 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 665 if (IWL_RATE_2M_INDEX < lowest_present_cck) 666 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 667 /* 1M already there or needed so always add */ 668 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 669 670 *cck_rates = cck; 671 *ofdm_rates = ofdm; 672 } 673 674 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 675 struct ieee80211_vif *vif, 676 struct iwl_mac_ctx_cmd *cmd) 677 { 678 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 679 u8 protection_mode = vif->bss_conf.ht_operation_mode & 680 IEEE80211_HT_OP_MODE_PROTECTION; 681 /* The fw does not distinguish between ht and fat */ 682 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 683 684 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 685 /* 686 * See section 9.23.3.1 of IEEE 80211-2012. 687 * Nongreenfield HT STAs Present is not supported. 688 */ 689 switch (protection_mode) { 690 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 691 break; 692 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 693 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 694 cmd->protection_flags |= cpu_to_le32(ht_flag); 695 break; 696 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 697 /* Protect when channel wider than 20MHz */ 698 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 699 cmd->protection_flags |= cpu_to_le32(ht_flag); 700 break; 701 default: 702 IWL_ERR(mvm, "Illegal protection mode %d\n", 703 protection_mode); 704 break; 705 } 706 } 707 708 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 709 struct ieee80211_vif *vif, 710 struct iwl_mac_ctx_cmd *cmd, 711 const u8 *bssid_override, 712 u32 action) 713 { 714 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 715 struct ieee80211_chanctx_conf *chanctx; 716 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 717 IEEE80211_HT_OP_MODE_PROTECTION); 718 u8 cck_ack_rates, ofdm_ack_rates; 719 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 720 int i; 721 722 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 723 mvmvif->color)); 724 cmd->action = cpu_to_le32(action); 725 726 switch (vif->type) { 727 case NL80211_IFTYPE_STATION: 728 if (vif->p2p) 729 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 730 else 731 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 732 break; 733 case NL80211_IFTYPE_AP: 734 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 735 break; 736 case NL80211_IFTYPE_MONITOR: 737 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 738 break; 739 case NL80211_IFTYPE_P2P_DEVICE: 740 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 741 break; 742 case NL80211_IFTYPE_ADHOC: 743 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 744 break; 745 default: 746 WARN_ON_ONCE(1); 747 } 748 749 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 750 751 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 752 753 if (bssid) 754 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 755 else 756 eth_broadcast_addr(cmd->bssid_addr); 757 758 rcu_read_lock(); 759 chanctx = rcu_dereference(vif->chanctx_conf); 760 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 761 : NL80211_BAND_2GHZ, 762 &cck_ack_rates, &ofdm_ack_rates); 763 rcu_read_unlock(); 764 765 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 766 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 767 768 cmd->cck_short_preamble = 769 cpu_to_le32(vif->bss_conf.use_short_preamble ? 770 MAC_FLG_SHORT_PREAMBLE : 0); 771 cmd->short_slot = 772 cpu_to_le32(vif->bss_conf.use_short_slot ? 773 MAC_FLG_SHORT_SLOT : 0); 774 775 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 776 777 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 778 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 779 780 cmd->ac[txf].cw_min = 781 cpu_to_le16(mvmvif->queue_params[i].cw_min); 782 cmd->ac[txf].cw_max = 783 cpu_to_le16(mvmvif->queue_params[i].cw_max); 784 cmd->ac[txf].edca_txop = 785 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 786 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 787 cmd->ac[txf].fifos_mask = BIT(txf); 788 } 789 790 if (vif->bss_conf.qos) 791 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 792 793 if (vif->bss_conf.use_cts_prot) 794 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 795 796 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 797 vif->bss_conf.use_cts_prot, 798 vif->bss_conf.ht_operation_mode); 799 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 800 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 801 if (ht_enabled) 802 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 803 } 804 805 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 806 struct iwl_mac_ctx_cmd *cmd) 807 { 808 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 809 sizeof(*cmd), cmd); 810 if (ret) 811 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 812 le32_to_cpu(cmd->action), ret); 813 return ret; 814 } 815 816 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 817 struct ieee80211_vif *vif, 818 u32 action, bool force_assoc_off, 819 const u8 *bssid_override) 820 { 821 struct iwl_mac_ctx_cmd cmd = {}; 822 struct iwl_mac_data_sta *ctxt_sta; 823 824 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 825 826 /* Fill the common data for all mac context types */ 827 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 828 829 if (vif->p2p) { 830 struct ieee80211_p2p_noa_attr *noa = 831 &vif->bss_conf.p2p_noa_attr; 832 833 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 834 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 835 ctxt_sta = &cmd.p2p_sta.sta; 836 } else { 837 ctxt_sta = &cmd.sta; 838 } 839 840 /* We need the dtim_period to set the MAC as associated */ 841 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 842 !force_assoc_off) { 843 u32 dtim_offs; 844 845 /* 846 * The DTIM count counts down, so when it is N that means N 847 * more beacon intervals happen until the DTIM TBTT. Therefore 848 * add this to the current time. If that ends up being in the 849 * future, the firmware will handle it. 850 * 851 * Also note that the system_timestamp (which we get here as 852 * "sync_device_ts") and TSF timestamp aren't at exactly the 853 * same offset in the frame -- the TSF is at the first symbol 854 * of the TSF, the system timestamp is at signal acquisition 855 * time. This means there's an offset between them of at most 856 * a few hundred microseconds (24 * 8 bits + PLCP time gives 857 * 384us in the longest case), this is currently not relevant 858 * as the firmware wakes up around 2ms before the TBTT. 859 */ 860 dtim_offs = vif->bss_conf.sync_dtim_count * 861 vif->bss_conf.beacon_int; 862 /* convert TU to usecs */ 863 dtim_offs *= 1024; 864 865 ctxt_sta->dtim_tsf = 866 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 867 ctxt_sta->dtim_time = 868 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 869 ctxt_sta->assoc_beacon_arrive_time = 870 cpu_to_le32(vif->bss_conf.sync_device_ts); 871 872 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 873 le64_to_cpu(ctxt_sta->dtim_tsf), 874 le32_to_cpu(ctxt_sta->dtim_time), 875 dtim_offs); 876 877 ctxt_sta->is_assoc = cpu_to_le32(1); 878 } else { 879 ctxt_sta->is_assoc = cpu_to_le32(0); 880 881 /* Allow beacons to pass through as long as we are not 882 * associated, or we do not have dtim period information. 883 */ 884 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 885 } 886 887 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 888 ctxt_sta->bi_reciprocal = 889 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 890 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 891 vif->bss_conf.dtim_period); 892 ctxt_sta->dtim_reciprocal = 893 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 894 vif->bss_conf.dtim_period)); 895 896 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 897 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 898 899 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 900 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 901 902 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 903 } 904 905 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 906 struct ieee80211_vif *vif, 907 u32 action) 908 { 909 struct iwl_mac_ctx_cmd cmd = {}; 910 u32 tfd_queue_msk = 0; 911 int ret, i; 912 913 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 914 915 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 916 917 if (!iwl_mvm_is_dqa_supported(mvm)) { 918 for (i = 0; i < IEEE80211_NUM_ACS; i++) 919 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 920 tfd_queue_msk |= BIT(vif->hw_queue[i]); 921 } 922 923 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 924 MAC_FILTER_IN_CONTROL_AND_MGMT | 925 MAC_FILTER_IN_BEACON | 926 MAC_FILTER_IN_PROBE_REQUEST | 927 MAC_FILTER_IN_CRC32); 928 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 929 930 /* Allocate sniffer station */ 931 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 932 vif->type, IWL_STA_GENERAL_PURPOSE); 933 if (ret) 934 return ret; 935 936 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 937 } 938 939 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 940 struct ieee80211_vif *vif, 941 u32 action) 942 { 943 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 944 struct iwl_mac_ctx_cmd cmd = {}; 945 946 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 947 948 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 949 950 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 951 MAC_FILTER_IN_PROBE_REQUEST); 952 953 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 954 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 955 cmd.ibss.bi_reciprocal = 956 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 957 958 /* TODO: Assumes that the beacon id == mac context id */ 959 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 960 961 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 962 } 963 964 struct iwl_mvm_go_iterator_data { 965 bool go_active; 966 }; 967 968 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 969 { 970 struct iwl_mvm_go_iterator_data *data = _data; 971 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 972 973 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 974 mvmvif->ap_ibss_active) 975 data->go_active = true; 976 } 977 978 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 979 struct ieee80211_vif *vif, 980 u32 action) 981 { 982 struct iwl_mac_ctx_cmd cmd = {}; 983 struct iwl_mvm_go_iterator_data data = {}; 984 985 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 986 987 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 988 989 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 990 991 /* Override the filter flags to accept only probe requests */ 992 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 993 994 /* 995 * This flag should be set to true when the P2P Device is 996 * discoverable and there is at least another active P2P GO. Settings 997 * this flag will allow the P2P Device to be discoverable on other 998 * channels in addition to its listen channel. 999 * Note that this flag should not be set in other cases as it opens the 1000 * Rx filters on all MAC and increases the number of interrupts. 1001 */ 1002 ieee80211_iterate_active_interfaces_atomic( 1003 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1004 iwl_mvm_go_iterator, &data); 1005 1006 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 1007 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1008 } 1009 1010 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 1011 __le32 *tim_index, __le32 *tim_size, 1012 u8 *beacon, u32 frame_size) 1013 { 1014 u32 tim_idx; 1015 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 1016 1017 /* The index is relative to frame start but we start looking at the 1018 * variable-length part of the beacon. */ 1019 tim_idx = mgmt->u.beacon.variable - beacon; 1020 1021 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 1022 while ((tim_idx < (frame_size - 2)) && 1023 (beacon[tim_idx] != WLAN_EID_TIM)) 1024 tim_idx += beacon[tim_idx+1] + 2; 1025 1026 /* If TIM field was found, set variables */ 1027 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 1028 *tim_index = cpu_to_le32(tim_idx); 1029 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 1030 } else { 1031 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 1032 } 1033 } 1034 1035 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 1036 { 1037 struct ieee80211_mgmt *mgmt = (void *)beacon; 1038 const u8 *ie; 1039 1040 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 1041 return 0; 1042 1043 frame_size -= mgmt->u.beacon.variable - beacon; 1044 1045 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 1046 if (!ie) 1047 return 0; 1048 1049 return ie - beacon; 1050 } 1051 1052 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 1053 struct ieee80211_vif *vif, 1054 struct sk_buff *beacon) 1055 { 1056 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1057 struct iwl_host_cmd cmd = { 1058 .id = BEACON_TEMPLATE_CMD, 1059 .flags = CMD_ASYNC, 1060 }; 1061 union { 1062 struct iwl_mac_beacon_cmd_v6 beacon_cmd_v6; 1063 struct iwl_mac_beacon_cmd_v7 beacon_cmd; 1064 } u = {}; 1065 struct iwl_mac_beacon_cmd beacon_cmd = {}; 1066 struct ieee80211_tx_info *info; 1067 u32 beacon_skb_len; 1068 u32 rate, tx_flags; 1069 1070 if (WARN_ON(!beacon)) 1071 return -EINVAL; 1072 1073 beacon_skb_len = beacon->len; 1074 1075 if (fw_has_capa(&mvm->fw->ucode_capa, 1076 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) { 1077 u32 csa_offset, ecsa_offset; 1078 1079 csa_offset = iwl_mvm_find_ie_offset(beacon->data, 1080 WLAN_EID_CHANNEL_SWITCH, 1081 beacon_skb_len); 1082 ecsa_offset = 1083 iwl_mvm_find_ie_offset(beacon->data, 1084 WLAN_EID_EXT_CHANSWITCH_ANN, 1085 beacon_skb_len); 1086 1087 if (iwl_mvm_has_new_tx_api(mvm)) { 1088 beacon_cmd.data.template_id = 1089 cpu_to_le32((u32)mvmvif->id); 1090 beacon_cmd.data.ecsa_offset = cpu_to_le32(ecsa_offset); 1091 beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1092 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon_skb_len); 1093 if (vif->type == NL80211_IFTYPE_AP) 1094 iwl_mvm_mac_ctxt_set_tim(mvm, 1095 &beacon_cmd.data.tim_idx, 1096 &beacon_cmd.data.tim_size, 1097 beacon->data, 1098 beacon_skb_len); 1099 cmd.len[0] = sizeof(beacon_cmd); 1100 cmd.data[0] = &beacon_cmd; 1101 goto send; 1102 1103 } else { 1104 u.beacon_cmd.data.ecsa_offset = 1105 cpu_to_le32(ecsa_offset); 1106 u.beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1107 cmd.len[0] = sizeof(u.beacon_cmd); 1108 cmd.data[0] = &u; 1109 } 1110 } else { 1111 cmd.len[0] = sizeof(u.beacon_cmd_v6); 1112 cmd.data[0] = &u; 1113 } 1114 1115 /* TODO: for now the beacon template id is set to be the mac context id. 1116 * Might be better to handle it as another resource ... */ 1117 u.beacon_cmd_v6.template_id = cpu_to_le32((u32)mvmvif->id); 1118 info = IEEE80211_SKB_CB(beacon); 1119 1120 /* Set up TX command fields */ 1121 u.beacon_cmd_v6.tx.len = cpu_to_le16((u16)beacon_skb_len); 1122 u.beacon_cmd_v6.tx.sta_id = mvmvif->bcast_sta.sta_id; 1123 u.beacon_cmd_v6.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 1124 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 1125 tx_flags |= 1126 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 1127 TX_CMD_FLG_BT_PRIO_POS; 1128 u.beacon_cmd_v6.tx.tx_flags = cpu_to_le32(tx_flags); 1129 1130 if (!fw_has_capa(&mvm->fw->ucode_capa, 1131 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 1132 mvm->mgmt_last_antenna_idx = 1133 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 1134 mvm->mgmt_last_antenna_idx); 1135 } 1136 1137 u.beacon_cmd_v6.tx.rate_n_flags = 1138 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 1139 RATE_MCS_ANT_POS); 1140 1141 if (info->band == NL80211_BAND_5GHZ || vif->p2p) { 1142 rate = IWL_FIRST_OFDM_RATE; 1143 } else { 1144 rate = IWL_FIRST_CCK_RATE; 1145 u.beacon_cmd_v6.tx.rate_n_flags |= 1146 cpu_to_le32(RATE_MCS_CCK_MSK); 1147 } 1148 u.beacon_cmd_v6.tx.rate_n_flags |= 1149 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 1150 1151 /* Set up TX beacon command fields */ 1152 if (vif->type == NL80211_IFTYPE_AP) 1153 iwl_mvm_mac_ctxt_set_tim(mvm, &u.beacon_cmd_v6.tim_idx, 1154 &u.beacon_cmd_v6.tim_size, 1155 beacon->data, 1156 beacon_skb_len); 1157 1158 send: 1159 /* Submit command */ 1160 cmd.dataflags[0] = 0; 1161 cmd.len[1] = beacon_skb_len; 1162 cmd.data[1] = beacon->data; 1163 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1164 1165 return iwl_mvm_send_cmd(mvm, &cmd); 1166 } 1167 1168 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1169 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1170 struct ieee80211_vif *vif) 1171 { 1172 struct sk_buff *beacon; 1173 int ret; 1174 1175 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1176 vif->type != NL80211_IFTYPE_ADHOC); 1177 1178 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1179 if (!beacon) 1180 return -ENOMEM; 1181 1182 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1183 dev_kfree_skb(beacon); 1184 return ret; 1185 } 1186 1187 struct iwl_mvm_mac_ap_iterator_data { 1188 struct iwl_mvm *mvm; 1189 struct ieee80211_vif *vif; 1190 u32 beacon_device_ts; 1191 u16 beacon_int; 1192 }; 1193 1194 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1195 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1196 struct ieee80211_vif *vif) 1197 { 1198 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1199 1200 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1201 return; 1202 1203 /* Station client has higher priority over P2P client*/ 1204 if (vif->p2p && data->beacon_device_ts) 1205 return; 1206 1207 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1208 data->beacon_int = vif->bss_conf.beacon_int; 1209 } 1210 1211 /* 1212 * Fill the specific data for mac context of type AP of P2P GO 1213 */ 1214 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1215 struct ieee80211_vif *vif, 1216 struct iwl_mac_ctx_cmd *cmd, 1217 struct iwl_mac_data_ap *ctxt_ap, 1218 bool add) 1219 { 1220 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1221 struct iwl_mvm_mac_ap_iterator_data data = { 1222 .mvm = mvm, 1223 .vif = vif, 1224 .beacon_device_ts = 0 1225 }; 1226 1227 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1228 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1229 1230 /* 1231 * in AP mode, pass probe requests and beacons from other APs 1232 * (needed for ht protection); when there're no any associated 1233 * station don't ask FW to pass beacons to prevent unnecessary 1234 * wake-ups. 1235 */ 1236 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1237 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1238 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1239 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1240 } else { 1241 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1242 } 1243 1244 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1245 ctxt_ap->bi_reciprocal = 1246 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1247 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1248 vif->bss_conf.dtim_period); 1249 ctxt_ap->dtim_reciprocal = 1250 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1251 vif->bss_conf.dtim_period)); 1252 1253 if (!fw_has_api(&mvm->fw->ucode_capa, 1254 IWL_UCODE_TLV_API_STA_TYPE)) 1255 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1256 1257 /* 1258 * Only set the beacon time when the MAC is being added, when we 1259 * just modify the MAC then we should keep the time -- the firmware 1260 * can otherwise have a "jumping" TBTT. 1261 */ 1262 if (add) { 1263 /* 1264 * If there is a station/P2P client interface which is 1265 * associated, set the AP's TBTT far enough from the station's 1266 * TBTT. Otherwise, set it to the current system time 1267 */ 1268 ieee80211_iterate_active_interfaces_atomic( 1269 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1270 iwl_mvm_mac_ap_iterator, &data); 1271 1272 if (data.beacon_device_ts) { 1273 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1274 mvmvif->ap_beacon_time = data.beacon_device_ts + 1275 ieee80211_tu_to_usec(data.beacon_int * rand / 1276 100); 1277 } else { 1278 mvmvif->ap_beacon_time = 1279 iwl_read_prph(mvm->trans, 1280 DEVICE_SYSTEM_TIME_REG); 1281 } 1282 } 1283 1284 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1285 ctxt_ap->beacon_tsf = 0; /* unused */ 1286 1287 /* TODO: Assume that the beacon id == mac context id */ 1288 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1289 } 1290 1291 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1292 struct ieee80211_vif *vif, 1293 u32 action) 1294 { 1295 struct iwl_mac_ctx_cmd cmd = {}; 1296 1297 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1298 1299 /* Fill the common data for all mac context types */ 1300 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1301 1302 /* Fill the data specific for ap mode */ 1303 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1304 action == FW_CTXT_ACTION_ADD); 1305 1306 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1307 } 1308 1309 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1310 struct ieee80211_vif *vif, 1311 u32 action) 1312 { 1313 struct iwl_mac_ctx_cmd cmd = {}; 1314 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1315 1316 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1317 1318 /* Fill the common data for all mac context types */ 1319 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1320 1321 /* Fill the data specific for GO mode */ 1322 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1323 action == FW_CTXT_ACTION_ADD); 1324 1325 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1326 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1327 cmd.go.opp_ps_enabled = 1328 cpu_to_le32(!!(noa->oppps_ctwindow & 1329 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1330 1331 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1332 } 1333 1334 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1335 u32 action, bool force_assoc_off, 1336 const u8 *bssid_override) 1337 { 1338 switch (vif->type) { 1339 case NL80211_IFTYPE_STATION: 1340 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1341 force_assoc_off, 1342 bssid_override); 1343 break; 1344 case NL80211_IFTYPE_AP: 1345 if (!vif->p2p) 1346 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1347 else 1348 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1349 break; 1350 case NL80211_IFTYPE_MONITOR: 1351 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1352 case NL80211_IFTYPE_P2P_DEVICE: 1353 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1354 case NL80211_IFTYPE_ADHOC: 1355 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1356 default: 1357 break; 1358 } 1359 1360 return -EOPNOTSUPP; 1361 } 1362 1363 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1364 { 1365 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1366 int ret; 1367 1368 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1369 vif->addr, ieee80211_vif_type_p2p(vif))) 1370 return -EIO; 1371 1372 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1373 true, NULL); 1374 if (ret) 1375 return ret; 1376 1377 /* will only do anything at resume from D3 time */ 1378 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1379 1380 mvmvif->uploaded = true; 1381 return 0; 1382 } 1383 1384 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1385 bool force_assoc_off, const u8 *bssid_override) 1386 { 1387 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1388 1389 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1390 vif->addr, ieee80211_vif_type_p2p(vif))) 1391 return -EIO; 1392 1393 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1394 force_assoc_off, bssid_override); 1395 } 1396 1397 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1398 { 1399 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1400 struct iwl_mac_ctx_cmd cmd; 1401 int ret; 1402 1403 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1404 vif->addr, ieee80211_vif_type_p2p(vif))) 1405 return -EIO; 1406 1407 memset(&cmd, 0, sizeof(cmd)); 1408 1409 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1410 mvmvif->color)); 1411 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1412 1413 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1414 sizeof(cmd), &cmd); 1415 if (ret) { 1416 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1417 return ret; 1418 } 1419 1420 mvmvif->uploaded = false; 1421 1422 if (vif->type == NL80211_IFTYPE_MONITOR) { 1423 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1424 iwl_mvm_dealloc_snif_sta(mvm); 1425 } 1426 1427 return 0; 1428 } 1429 1430 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1431 struct ieee80211_vif *csa_vif, u32 gp2, 1432 bool tx_success) 1433 { 1434 struct iwl_mvm_vif *mvmvif = 1435 iwl_mvm_vif_from_mac80211(csa_vif); 1436 1437 /* Don't start to countdown from a failed beacon */ 1438 if (!tx_success && !mvmvif->csa_countdown) 1439 return; 1440 1441 mvmvif->csa_countdown = true; 1442 1443 if (!ieee80211_csa_is_complete(csa_vif)) { 1444 int c = ieee80211_csa_update_counter(csa_vif); 1445 1446 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1447 if (csa_vif->p2p && 1448 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1449 tx_success) { 1450 u32 rel_time = (c + 1) * 1451 csa_vif->bss_conf.beacon_int - 1452 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1453 u32 apply_time = gp2 + rel_time * 1024; 1454 1455 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1456 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1457 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1458 apply_time); 1459 } 1460 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1461 /* we don't have CSA NoA scheduled yet, switch now */ 1462 ieee80211_csa_finish(csa_vif); 1463 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1464 } 1465 } 1466 1467 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1468 struct iwl_rx_cmd_buffer *rxb) 1469 { 1470 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1471 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1472 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1473 struct ieee80211_vif *csa_vif; 1474 struct ieee80211_vif *tx_blocked_vif; 1475 struct agg_tx_status *agg_status; 1476 u16 status; 1477 1478 lockdep_assert_held(&mvm->mutex); 1479 1480 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1481 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1482 mvm->ibss_manager = beacon->ibss_mgr_status != 0; 1483 1484 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr); 1485 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK; 1486 IWL_DEBUG_RX(mvm, 1487 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1488 status, beacon_notify_hdr->failure_frame, 1489 le64_to_cpu(beacon->tsf), 1490 mvm->ap_last_beacon_gp2, 1491 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1492 1493 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1494 lockdep_is_held(&mvm->mutex)); 1495 if (unlikely(csa_vif && csa_vif->csa_active)) 1496 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1497 (status == TX_STATUS_SUCCESS)); 1498 1499 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1500 lockdep_is_held(&mvm->mutex)); 1501 if (unlikely(tx_blocked_vif)) { 1502 struct iwl_mvm_vif *mvmvif = 1503 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1504 1505 /* 1506 * The channel switch is started and we have blocked the 1507 * stations. If this is the first beacon (the timeout wasn't 1508 * set), set the unblock timeout, otherwise countdown 1509 */ 1510 if (!mvm->csa_tx_block_bcn_timeout) 1511 mvm->csa_tx_block_bcn_timeout = 1512 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1513 else 1514 mvm->csa_tx_block_bcn_timeout--; 1515 1516 /* Check if the timeout is expired, and unblock tx */ 1517 if (mvm->csa_tx_block_bcn_timeout == 0) { 1518 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1519 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1520 } 1521 } 1522 } 1523 1524 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1525 struct ieee80211_vif *vif) 1526 { 1527 struct iwl_missed_beacons_notif *missed_beacons = _data; 1528 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1529 struct iwl_mvm *mvm = mvmvif->mvm; 1530 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1531 struct iwl_fw_dbg_trigger_tlv *trigger; 1532 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1533 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1534 1535 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1536 return; 1537 1538 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1539 rx_missed_bcon_since_rx = 1540 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1541 /* 1542 * TODO: the threshold should be adjusted based on latency conditions, 1543 * and/or in case of a CS flow on one of the other AP vifs. 1544 */ 1545 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1546 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1547 ieee80211_beacon_loss(vif); 1548 1549 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1550 FW_DBG_TRIGGER_MISSED_BEACONS)) 1551 return; 1552 1553 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1554 FW_DBG_TRIGGER_MISSED_BEACONS); 1555 bcon_trig = (void *)trigger->data; 1556 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1557 stop_trig_missed_bcon_since_rx = 1558 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1559 1560 /* TODO: implement start trigger */ 1561 1562 if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) 1563 return; 1564 1565 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1566 rx_missed_bcon >= stop_trig_missed_bcon) 1567 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL); 1568 } 1569 1570 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1571 struct iwl_rx_cmd_buffer *rxb) 1572 { 1573 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1574 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1575 1576 IWL_DEBUG_INFO(mvm, 1577 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1578 le32_to_cpu(mb->mac_id), 1579 le32_to_cpu(mb->consec_missed_beacons), 1580 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1581 le32_to_cpu(mb->num_recvd_beacons), 1582 le32_to_cpu(mb->num_expected_beacons)); 1583 1584 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1585 IEEE80211_IFACE_ITER_NORMAL, 1586 iwl_mvm_beacon_loss_iterator, 1587 mb); 1588 } 1589 1590 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1591 struct iwl_rx_cmd_buffer *rxb) 1592 { 1593 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1594 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1595 struct ieee80211_rx_status rx_status; 1596 struct sk_buff *skb; 1597 u32 size = le32_to_cpu(sb->byte_count); 1598 1599 if (size == 0) 1600 return; 1601 1602 skb = alloc_skb(size, GFP_ATOMIC); 1603 if (!skb) { 1604 IWL_ERR(mvm, "alloc_skb failed\n"); 1605 return; 1606 } 1607 1608 /* update rx_status according to the notification's metadata */ 1609 memset(&rx_status, 0, sizeof(rx_status)); 1610 rx_status.mactime = le64_to_cpu(sb->tsf); 1611 /* TSF as indicated by the firmware is at INA time */ 1612 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1613 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1614 rx_status.band = 1615 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1616 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1617 rx_status.freq = 1618 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1619 rx_status.band); 1620 1621 /* copy the data */ 1622 skb_put_data(skb, sb->data, size); 1623 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1624 1625 /* pass it as regular rx to mac80211 */ 1626 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1627 } 1628 1629 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1630 struct iwl_rx_cmd_buffer *rxb) 1631 { 1632 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1633 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1634 struct ieee80211_vif *csa_vif; 1635 struct iwl_mvm_vif *mvmvif; 1636 int len = iwl_rx_packet_payload_len(pkt); 1637 u32 id_n_color; 1638 1639 if (WARN_ON_ONCE(len < sizeof(*notif))) 1640 return; 1641 1642 rcu_read_lock(); 1643 1644 csa_vif = rcu_dereference(mvm->csa_vif); 1645 if (WARN_ON(!csa_vif || !csa_vif->csa_active)) 1646 goto out_unlock; 1647 1648 id_n_color = le32_to_cpu(notif->id_and_color); 1649 1650 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); 1651 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, 1652 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1653 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) 1654 goto out_unlock; 1655 1656 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1657 1658 schedule_delayed_work(&mvm->cs_tx_unblock_dwork, 1659 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1660 csa_vif->bss_conf.beacon_int)); 1661 1662 ieee80211_csa_finish(csa_vif); 1663 1664 rcu_read_unlock(); 1665 1666 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1667 1668 return; 1669 1670 out_unlock: 1671 rcu_read_unlock(); 1672 } 1673