1/****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 42 * * Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * * Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in 46 * the documentation and/or other materials provided with the 47 * distribution. 48 * * Neither the name Intel Corporation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 * 64 *****************************************************************************/ 65 66#include <linux/etherdevice.h> 67#include <net/mac80211.h> 68#include "iwl-io.h" 69#include "iwl-prph.h" 70#include "fw-api.h" 71#include "mvm.h" 72#include "time-event.h" 73 74const u8 iwl_mvm_ac_to_tx_fifo[] = { 75 IWL_MVM_TX_FIFO_VO, 76 IWL_MVM_TX_FIFO_VI, 77 IWL_MVM_TX_FIFO_BE, 78 IWL_MVM_TX_FIFO_BK, 79}; 80 81struct iwl_mvm_mac_iface_iterator_data { 82 struct iwl_mvm *mvm; 83 struct ieee80211_vif *vif; 84 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; 85 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; 86 enum iwl_tsf_id preferred_tsf; 87 bool found_vif; 88}; 89 90struct iwl_mvm_hw_queues_iface_iterator_data { 91 struct ieee80211_vif *exclude_vif; 92 unsigned long used_hw_queues; 93}; 94 95static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 96 struct ieee80211_vif *vif) 97{ 98 struct iwl_mvm_mac_iface_iterator_data *data = _data; 99 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 100 u16 min_bi; 101 102 /* Skip the interface for which we are trying to assign a tsf_id */ 103 if (vif == data->vif) 104 return; 105 106 /* 107 * The TSF is a hardware/firmware resource, there are 4 and 108 * the driver should assign and free them as needed. However, 109 * there are cases where 2 MACs should share the same TSF ID 110 * for the purpose of clock sync, an optimization to avoid 111 * clock drift causing overlapping TBTTs/DTIMs for a GO and 112 * client in the system. 113 * 114 * The firmware will decide according to the MAC type which 115 * will be the master and slave. Clients that need to sync 116 * with a remote station will be the master, and an AP or GO 117 * will be the slave. 118 * 119 * Depending on the new interface type it can be slaved to 120 * or become the master of an existing interface. 121 */ 122 switch (data->vif->type) { 123 case NL80211_IFTYPE_STATION: 124 /* 125 * The new interface is a client, so if the one we're iterating 126 * is an AP, and the beacon interval of the AP is a multiple or 127 * divisor of the beacon interval of the client, the same TSF 128 * should be used to avoid drift between the new client and 129 * existing AP. The existing AP will get drift updates from the 130 * new client context in this case. 131 */ 132 if (vif->type != NL80211_IFTYPE_AP || 133 data->preferred_tsf != NUM_TSF_IDS || 134 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 135 break; 136 137 min_bi = min(data->vif->bss_conf.beacon_int, 138 vif->bss_conf.beacon_int); 139 140 if (!min_bi) 141 break; 142 143 if ((data->vif->bss_conf.beacon_int - 144 vif->bss_conf.beacon_int) % min_bi == 0) { 145 data->preferred_tsf = mvmvif->tsf_id; 146 return; 147 } 148 break; 149 150 case NL80211_IFTYPE_AP: 151 /* 152 * The new interface is AP/GO, so if its beacon interval is a 153 * multiple or a divisor of the beacon interval of an existing 154 * interface, it should get drift updates from an existing 155 * client or use the same TSF as an existing GO. There's no 156 * drift between TSFs internally but if they used different 157 * TSFs then a new client MAC could update one of them and 158 * cause drift that way. 159 */ 160 if ((vif->type != NL80211_IFTYPE_AP && 161 vif->type != NL80211_IFTYPE_STATION) || 162 data->preferred_tsf != NUM_TSF_IDS || 163 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 164 break; 165 166 min_bi = min(data->vif->bss_conf.beacon_int, 167 vif->bss_conf.beacon_int); 168 169 if (!min_bi) 170 break; 171 172 if ((data->vif->bss_conf.beacon_int - 173 vif->bss_conf.beacon_int) % min_bi == 0) { 174 data->preferred_tsf = mvmvif->tsf_id; 175 return; 176 } 177 break; 178 default: 179 /* 180 * For all other interface types there's no need to 181 * take drift into account. Either they're exclusive 182 * like IBSS and monitor, or we don't care much about 183 * their TSF (like P2P Device), but we won't be able 184 * to share the TSF resource. 185 */ 186 break; 187 } 188 189 /* 190 * Unless we exited above, we can't share the TSF resource 191 * that the virtual interface we're iterating over is using 192 * with the new one, so clear the available bit and if this 193 * was the preferred one, reset that as well. 194 */ 195 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 196 197 if (data->preferred_tsf == mvmvif->tsf_id) 198 data->preferred_tsf = NUM_TSF_IDS; 199} 200 201/* 202 * Get the mask of the queues used by the vif 203 */ 204u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif) 205{ 206 u32 qmask = 0, ac; 207 208 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 209 return BIT(IWL_MVM_OFFCHANNEL_QUEUE); 210 211 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 212 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 213 qmask |= BIT(vif->hw_queue[ac]); 214 } 215 216 if (vif->type == NL80211_IFTYPE_AP) 217 qmask |= BIT(vif->cab_queue); 218 219 return qmask; 220} 221 222static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, 223 struct ieee80211_vif *vif) 224{ 225 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 226 227 /* exclude the given vif */ 228 if (vif == data->exclude_vif) 229 return; 230 231 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); 232} 233 234static void iwl_mvm_mac_sta_hw_queues_iter(void *_data, 235 struct ieee80211_sta *sta) 236{ 237 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 238 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 239 240 /* Mark the queues used by the sta */ 241 data->used_hw_queues |= mvmsta->tfd_queue_msk; 242} 243 244unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, 245 struct ieee80211_vif *exclude_vif) 246{ 247 u8 sta_id; 248 struct iwl_mvm_hw_queues_iface_iterator_data data = { 249 .exclude_vif = exclude_vif, 250 .used_hw_queues = 251 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 252 BIT(mvm->aux_queue) | 253 BIT(IWL_MVM_CMD_QUEUE), 254 }; 255 256 lockdep_assert_held(&mvm->mutex); 257 258 /* mark all VIF used hw queues */ 259 ieee80211_iterate_active_interfaces_atomic( 260 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 261 iwl_mvm_iface_hw_queues_iter, &data); 262 263 /* don't assign the same hw queues as TDLS stations */ 264 ieee80211_iterate_stations_atomic(mvm->hw, 265 iwl_mvm_mac_sta_hw_queues_iter, 266 &data); 267 268 /* 269 * Some TDLS stations may be removed but are in the process of being 270 * drained. Don't touch their queues. 271 */ 272 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) 273 data.used_hw_queues |= mvm->tfd_drained[sta_id]; 274 275 return data.used_hw_queues; 276} 277 278static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 279 struct ieee80211_vif *vif) 280{ 281 struct iwl_mvm_mac_iface_iterator_data *data = _data; 282 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 283 284 /* Iterator may already find the interface being added -- skip it */ 285 if (vif == data->vif) { 286 data->found_vif = true; 287 return; 288 } 289 290 /* Mark MAC IDs as used by clearing the available bit, and 291 * (below) mark TSFs as used if their existing use is not 292 * compatible with the new interface type. 293 * No locking or atomic bit operations are needed since the 294 * data is on the stack of the caller function. 295 */ 296 __clear_bit(mvmvif->id, data->available_mac_ids); 297 298 /* find a suitable tsf_id */ 299 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 300} 301 302void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 303 struct ieee80211_vif *vif) 304{ 305 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 306 struct iwl_mvm_mac_iface_iterator_data data = { 307 .mvm = mvm, 308 .vif = vif, 309 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 310 /* no preference yet */ 311 .preferred_tsf = NUM_TSF_IDS, 312 }; 313 314 ieee80211_iterate_active_interfaces_atomic( 315 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 316 iwl_mvm_mac_tsf_id_iter, &data); 317 318 if (data.preferred_tsf != NUM_TSF_IDS) 319 mvmvif->tsf_id = data.preferred_tsf; 320 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 321 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 322 NUM_TSF_IDS); 323} 324 325static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, 326 struct ieee80211_vif *vif) 327{ 328 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 329 struct iwl_mvm_mac_iface_iterator_data data = { 330 .mvm = mvm, 331 .vif = vif, 332 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 333 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 334 /* no preference yet */ 335 .preferred_tsf = NUM_TSF_IDS, 336 .found_vif = false, 337 }; 338 u32 ac; 339 int ret, i; 340 unsigned long used_hw_queues; 341 342 /* 343 * Allocate a MAC ID and a TSF for this MAC, along with the queues 344 * and other resources. 345 */ 346 347 /* 348 * Before the iterator, we start with all MAC IDs and TSFs available. 349 * 350 * During iteration, all MAC IDs are cleared that are in use by other 351 * virtual interfaces, and all TSF IDs are cleared that can't be used 352 * by this new virtual interface because they're used by an interface 353 * that can't share it with the new one. 354 * At the same time, we check if there's a preferred TSF in the case 355 * that we should share it with another interface. 356 */ 357 358 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 359 switch (vif->type) { 360 case NL80211_IFTYPE_ADHOC: 361 break; 362 case NL80211_IFTYPE_STATION: 363 if (!vif->p2p) 364 break; 365 /* fall through */ 366 default: 367 __clear_bit(0, data.available_mac_ids); 368 } 369 370 ieee80211_iterate_active_interfaces_atomic( 371 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 372 iwl_mvm_mac_iface_iterator, &data); 373 374 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 375 376 /* 377 * In the case we're getting here during resume, it's similar to 378 * firmware restart, and with RESUME_ALL the iterator will find 379 * the vif being added already. 380 * We don't want to reassign any IDs in either case since doing 381 * so would probably assign different IDs (as interfaces aren't 382 * necessarily added in the same order), but the old IDs were 383 * preserved anyway, so skip ID assignment for both resume and 384 * recovery. 385 */ 386 if (data.found_vif) 387 return 0; 388 389 /* Therefore, in recovery, we can't get here */ 390 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 391 return -EBUSY; 392 393 mvmvif->id = find_first_bit(data.available_mac_ids, 394 NUM_MAC_INDEX_DRIVER); 395 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 396 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 397 ret = -EIO; 398 goto exit_fail; 399 } 400 401 if (data.preferred_tsf != NUM_TSF_IDS) 402 mvmvif->tsf_id = data.preferred_tsf; 403 else 404 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 405 NUM_TSF_IDS); 406 if (mvmvif->tsf_id == NUM_TSF_IDS) { 407 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 408 ret = -EIO; 409 goto exit_fail; 410 } 411 412 mvmvif->color = 0; 413 414 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 415 mvmvif->time_event_data.id = TE_MAX; 416 417 /* No need to allocate data queues to P2P Device MAC.*/ 418 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 419 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 420 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 421 422 return 0; 423 } 424 425 /* Find available queues, and allocate them to the ACs */ 426 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 427 u8 queue = find_first_zero_bit(&used_hw_queues, 428 mvm->first_agg_queue); 429 430 if (queue >= mvm->first_agg_queue) { 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 u8 queue = find_first_zero_bit(&used_hw_queues, 443 mvm->first_agg_queue); 444 445 if (queue >= mvm->first_agg_queue) { 446 IWL_ERR(mvm, "Failed to allocate cab queue\n"); 447 ret = -EIO; 448 goto exit_fail; 449 } 450 451 vif->cab_queue = queue; 452 } else { 453 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 454 } 455 456 mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; 457 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 458 459 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 460 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 461 462 return 0; 463 464exit_fail: 465 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 466 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 467 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 468 return ret; 469} 470 471int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 472{ 473 unsigned int wdg_timeout = 474 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 475 u32 ac; 476 int ret; 477 478 lockdep_assert_held(&mvm->mutex); 479 480 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 481 if (ret) 482 return ret; 483 484 switch (vif->type) { 485 case NL80211_IFTYPE_P2P_DEVICE: 486 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 487 IWL_MVM_TX_FIFO_VO, wdg_timeout); 488 break; 489 case NL80211_IFTYPE_AP: 490 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, 491 IWL_MVM_TX_FIFO_MCAST, wdg_timeout); 492 /* fall through */ 493 default: 494 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 495 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 496 iwl_mvm_ac_to_tx_fifo[ac], 497 wdg_timeout); 498 break; 499 } 500 501 return 0; 502} 503 504void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 505{ 506 int ac; 507 508 lockdep_assert_held(&mvm->mutex); 509 510 switch (vif->type) { 511 case NL80211_IFTYPE_P2P_DEVICE: 512 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 0); 513 break; 514 case NL80211_IFTYPE_AP: 515 iwl_mvm_disable_txq(mvm, vif->cab_queue, 0); 516 /* fall through */ 517 default: 518 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 519 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], 0); 520 } 521} 522 523static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 524 struct ieee80211_vif *vif, 525 enum ieee80211_band band, 526 u8 *cck_rates, u8 *ofdm_rates) 527{ 528 struct ieee80211_supported_band *sband; 529 unsigned long basic = vif->bss_conf.basic_rates; 530 int lowest_present_ofdm = 100; 531 int lowest_present_cck = 100; 532 u8 cck = 0; 533 u8 ofdm = 0; 534 int i; 535 536 sband = mvm->hw->wiphy->bands[band]; 537 538 for_each_set_bit(i, &basic, BITS_PER_LONG) { 539 int hw = sband->bitrates[i].hw_value; 540 if (hw >= IWL_FIRST_OFDM_RATE) { 541 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 542 if (lowest_present_ofdm > hw) 543 lowest_present_ofdm = hw; 544 } else { 545 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 546 547 cck |= BIT(hw); 548 if (lowest_present_cck > hw) 549 lowest_present_cck = hw; 550 } 551 } 552 553 /* 554 * Now we've got the basic rates as bitmaps in the ofdm and cck 555 * variables. This isn't sufficient though, as there might not 556 * be all the right rates in the bitmap. E.g. if the only basic 557 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 558 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 559 * 560 * [...] a STA responding to a received frame shall transmit 561 * its Control Response frame [...] at the highest rate in the 562 * BSSBasicRateSet parameter that is less than or equal to the 563 * rate of the immediately previous frame in the frame exchange 564 * sequence ([...]) and that is of the same modulation class 565 * ([...]) as the received frame. If no rate contained in the 566 * BSSBasicRateSet parameter meets these conditions, then the 567 * control frame sent in response to a received frame shall be 568 * transmitted at the highest mandatory rate of the PHY that is 569 * less than or equal to the rate of the received frame, and 570 * that is of the same modulation class as the received frame. 571 * 572 * As a consequence, we need to add all mandatory rates that are 573 * lower than all of the basic rates to these bitmaps. 574 */ 575 576 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 577 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 578 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 579 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 580 /* 6M already there or needed so always add */ 581 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 582 583 /* 584 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 585 * Note, however: 586 * - if no CCK rates are basic, it must be ERP since there must 587 * be some basic rates at all, so they're OFDM => ERP PHY 588 * (or we're in 5 GHz, and the cck bitmap will never be used) 589 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 590 * - if 5.5M is basic, 1M and 2M are mandatory 591 * - if 2M is basic, 1M is mandatory 592 * - if 1M is basic, that's the only valid ACK rate. 593 * As a consequence, it's not as complicated as it sounds, just add 594 * any lower rates to the ACK rate bitmap. 595 */ 596 if (IWL_RATE_11M_INDEX < lowest_present_cck) 597 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 598 if (IWL_RATE_5M_INDEX < lowest_present_cck) 599 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 600 if (IWL_RATE_2M_INDEX < lowest_present_cck) 601 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 602 /* 1M already there or needed so always add */ 603 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 604 605 *cck_rates = cck; 606 *ofdm_rates = ofdm; 607} 608 609static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 610 struct ieee80211_vif *vif, 611 struct iwl_mac_ctx_cmd *cmd) 612{ 613 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 614 u8 protection_mode = vif->bss_conf.ht_operation_mode & 615 IEEE80211_HT_OP_MODE_PROTECTION; 616 /* The fw does not distinguish between ht and fat */ 617 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 618 619 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 620 /* 621 * See section 9.23.3.1 of IEEE 80211-2012. 622 * Nongreenfield HT STAs Present is not supported. 623 */ 624 switch (protection_mode) { 625 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 626 break; 627 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 628 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 629 cmd->protection_flags |= cpu_to_le32(ht_flag); 630 break; 631 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 632 /* Protect when channel wider than 20MHz */ 633 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 634 cmd->protection_flags |= cpu_to_le32(ht_flag); 635 break; 636 default: 637 IWL_ERR(mvm, "Illegal protection mode %d\n", 638 protection_mode); 639 break; 640 } 641} 642 643static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 644 struct ieee80211_vif *vif, 645 struct iwl_mac_ctx_cmd *cmd, 646 const u8 *bssid_override, 647 u32 action) 648{ 649 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 650 struct ieee80211_chanctx_conf *chanctx; 651 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 652 IEEE80211_HT_OP_MODE_PROTECTION); 653 u8 cck_ack_rates, ofdm_ack_rates; 654 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 655 int i; 656 657 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 658 mvmvif->color)); 659 cmd->action = cpu_to_le32(action); 660 661 switch (vif->type) { 662 case NL80211_IFTYPE_STATION: 663 if (vif->p2p) 664 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 665 else 666 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 667 break; 668 case NL80211_IFTYPE_AP: 669 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 670 break; 671 case NL80211_IFTYPE_MONITOR: 672 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 673 break; 674 case NL80211_IFTYPE_P2P_DEVICE: 675 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 676 break; 677 case NL80211_IFTYPE_ADHOC: 678 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 679 break; 680 default: 681 WARN_ON_ONCE(1); 682 } 683 684 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 685 686 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 687 688 if (bssid) 689 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 690 else 691 eth_broadcast_addr(cmd->bssid_addr); 692 693 rcu_read_lock(); 694 chanctx = rcu_dereference(vif->chanctx_conf); 695 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 696 : IEEE80211_BAND_2GHZ, 697 &cck_ack_rates, &ofdm_ack_rates); 698 rcu_read_unlock(); 699 700 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 701 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 702 703 cmd->cck_short_preamble = 704 cpu_to_le32(vif->bss_conf.use_short_preamble ? 705 MAC_FLG_SHORT_PREAMBLE : 0); 706 cmd->short_slot = 707 cpu_to_le32(vif->bss_conf.use_short_slot ? 708 MAC_FLG_SHORT_SLOT : 0); 709 710 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 711 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 712 713 cmd->ac[txf].cw_min = 714 cpu_to_le16(mvmvif->queue_params[i].cw_min); 715 cmd->ac[txf].cw_max = 716 cpu_to_le16(mvmvif->queue_params[i].cw_max); 717 cmd->ac[txf].edca_txop = 718 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 719 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 720 cmd->ac[txf].fifos_mask = BIT(txf); 721 } 722 723 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 724 if (vif->type == NL80211_IFTYPE_AP) 725 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= 726 BIT(IWL_MVM_TX_FIFO_MCAST); 727 728 if (vif->bss_conf.qos) 729 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 730 731 if (vif->bss_conf.use_cts_prot) 732 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 733 734 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 735 vif->bss_conf.use_cts_prot, 736 vif->bss_conf.ht_operation_mode); 737 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 738 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 739 if (ht_enabled) 740 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 741 742 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 743} 744 745static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 746 struct iwl_mac_ctx_cmd *cmd) 747{ 748 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 749 sizeof(*cmd), cmd); 750 if (ret) 751 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 752 le32_to_cpu(cmd->action), ret); 753 return ret; 754} 755 756static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 757 struct ieee80211_vif *vif, 758 u32 action, bool force_assoc_off, 759 const u8 *bssid_override) 760{ 761 struct iwl_mac_ctx_cmd cmd = {}; 762 struct iwl_mac_data_sta *ctxt_sta; 763 764 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 765 766 /* Fill the common data for all mac context types */ 767 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 768 769 if (vif->p2p) { 770 struct ieee80211_p2p_noa_attr *noa = 771 &vif->bss_conf.p2p_noa_attr; 772 773 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 774 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 775 ctxt_sta = &cmd.p2p_sta.sta; 776 } else { 777 ctxt_sta = &cmd.sta; 778 } 779 780 /* We need the dtim_period to set the MAC as associated */ 781 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 782 !force_assoc_off) { 783 u32 dtim_offs; 784 785 /* 786 * The DTIM count counts down, so when it is N that means N 787 * more beacon intervals happen until the DTIM TBTT. Therefore 788 * add this to the current time. If that ends up being in the 789 * future, the firmware will handle it. 790 * 791 * Also note that the system_timestamp (which we get here as 792 * "sync_device_ts") and TSF timestamp aren't at exactly the 793 * same offset in the frame -- the TSF is at the first symbol 794 * of the TSF, the system timestamp is at signal acquisition 795 * time. This means there's an offset between them of at most 796 * a few hundred microseconds (24 * 8 bits + PLCP time gives 797 * 384us in the longest case), this is currently not relevant 798 * as the firmware wakes up around 2ms before the TBTT. 799 */ 800 dtim_offs = vif->bss_conf.sync_dtim_count * 801 vif->bss_conf.beacon_int; 802 /* convert TU to usecs */ 803 dtim_offs *= 1024; 804 805 ctxt_sta->dtim_tsf = 806 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 807 ctxt_sta->dtim_time = 808 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 809 810 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 811 le64_to_cpu(ctxt_sta->dtim_tsf), 812 le32_to_cpu(ctxt_sta->dtim_time), 813 dtim_offs); 814 815 ctxt_sta->is_assoc = cpu_to_le32(1); 816 } else { 817 ctxt_sta->is_assoc = cpu_to_le32(0); 818 819 /* Allow beacons to pass through as long as we are not 820 * associated, or we do not have dtim period information. 821 */ 822 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 823 } 824 825 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 826 ctxt_sta->bi_reciprocal = 827 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 828 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 829 vif->bss_conf.dtim_period); 830 ctxt_sta->dtim_reciprocal = 831 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 832 vif->bss_conf.dtim_period)); 833 834 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 835 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 836 837 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 838} 839 840static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 841 struct ieee80211_vif *vif, 842 u32 action) 843{ 844 struct iwl_mac_ctx_cmd cmd = {}; 845 846 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 847 848 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 849 850 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 851 MAC_FILTER_IN_CONTROL_AND_MGMT | 852 MAC_FILTER_IN_BEACON | 853 MAC_FILTER_IN_PROBE_REQUEST | 854 MAC_FILTER_IN_CRC32); 855 mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; 856 857 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 858} 859 860static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 861 struct ieee80211_vif *vif, 862 u32 action) 863{ 864 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 865 struct iwl_mac_ctx_cmd cmd = {}; 866 867 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 868 869 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 870 871 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 872 MAC_FILTER_IN_PROBE_REQUEST); 873 874 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 875 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 876 cmd.ibss.bi_reciprocal = 877 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 878 879 /* TODO: Assumes that the beacon id == mac context id */ 880 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 881 882 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 883} 884 885struct iwl_mvm_go_iterator_data { 886 bool go_active; 887}; 888 889static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 890{ 891 struct iwl_mvm_go_iterator_data *data = _data; 892 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 893 894 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 895 mvmvif->ap_ibss_active) 896 data->go_active = true; 897} 898 899static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 900 struct ieee80211_vif *vif, 901 u32 action) 902{ 903 struct iwl_mac_ctx_cmd cmd = {}; 904 struct iwl_mvm_go_iterator_data data = {}; 905 906 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 907 908 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 909 910 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 911 912 /* Override the filter flags to accept only probe requests */ 913 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 914 915 /* 916 * This flag should be set to true when the P2P Device is 917 * discoverable and there is at least another active P2P GO. Settings 918 * this flag will allow the P2P Device to be discoverable on other 919 * channels in addition to its listen channel. 920 * Note that this flag should not be set in other cases as it opens the 921 * Rx filters on all MAC and increases the number of interrupts. 922 */ 923 ieee80211_iterate_active_interfaces_atomic( 924 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 925 iwl_mvm_go_iterator, &data); 926 927 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 928 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 929} 930 931static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 932 struct iwl_mac_beacon_cmd *beacon_cmd, 933 u8 *beacon, u32 frame_size) 934{ 935 u32 tim_idx; 936 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 937 938 /* The index is relative to frame start but we start looking at the 939 * variable-length part of the beacon. */ 940 tim_idx = mgmt->u.beacon.variable - beacon; 941 942 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 943 while ((tim_idx < (frame_size - 2)) && 944 (beacon[tim_idx] != WLAN_EID_TIM)) 945 tim_idx += beacon[tim_idx+1] + 2; 946 947 /* If TIM field was found, set variables */ 948 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 949 beacon_cmd->tim_idx = cpu_to_le32(tim_idx); 950 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]); 951 } else { 952 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 953 } 954} 955 956static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 957 struct ieee80211_vif *vif, 958 struct sk_buff *beacon) 959{ 960 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 961 struct iwl_host_cmd cmd = { 962 .id = BEACON_TEMPLATE_CMD, 963 .flags = CMD_ASYNC, 964 }; 965 struct iwl_mac_beacon_cmd beacon_cmd = {}; 966 struct ieee80211_tx_info *info; 967 u32 beacon_skb_len; 968 u32 rate, tx_flags; 969 970 if (WARN_ON(!beacon)) 971 return -EINVAL; 972 973 beacon_skb_len = beacon->len; 974 975 /* TODO: for now the beacon template id is set to be the mac context id. 976 * Might be better to handle it as another resource ... */ 977 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 978 info = IEEE80211_SKB_CB(beacon); 979 980 /* Set up TX command fields */ 981 beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len); 982 beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id; 983 beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 984 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 985 tx_flags |= 986 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 987 TX_CMD_FLG_BT_PRIO_POS; 988 beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags); 989 990 mvm->mgmt_last_antenna_idx = 991 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 992 mvm->mgmt_last_antenna_idx); 993 994 beacon_cmd.tx.rate_n_flags = 995 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 996 RATE_MCS_ANT_POS); 997 998 if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) { 999 rate = IWL_FIRST_OFDM_RATE; 1000 } else { 1001 rate = IWL_FIRST_CCK_RATE; 1002 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); 1003 } 1004 beacon_cmd.tx.rate_n_flags |= 1005 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 1006 1007 /* Set up TX beacon command fields */ 1008 if (vif->type == NL80211_IFTYPE_AP) 1009 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd, 1010 beacon->data, 1011 beacon_skb_len); 1012 1013 /* Submit command */ 1014 cmd.len[0] = sizeof(beacon_cmd); 1015 cmd.data[0] = &beacon_cmd; 1016 cmd.dataflags[0] = 0; 1017 cmd.len[1] = beacon_skb_len; 1018 cmd.data[1] = beacon->data; 1019 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1020 1021 return iwl_mvm_send_cmd(mvm, &cmd); 1022} 1023 1024/* The beacon template for the AP/GO/IBSS has changed and needs update */ 1025int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1026 struct ieee80211_vif *vif) 1027{ 1028 struct sk_buff *beacon; 1029 int ret; 1030 1031 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1032 vif->type != NL80211_IFTYPE_ADHOC); 1033 1034 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1035 if (!beacon) 1036 return -ENOMEM; 1037 1038 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1039 dev_kfree_skb(beacon); 1040 return ret; 1041} 1042 1043struct iwl_mvm_mac_ap_iterator_data { 1044 struct iwl_mvm *mvm; 1045 struct ieee80211_vif *vif; 1046 u32 beacon_device_ts; 1047 u16 beacon_int; 1048}; 1049 1050/* Find the beacon_device_ts and beacon_int for a managed interface */ 1051static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1052 struct ieee80211_vif *vif) 1053{ 1054 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1055 1056 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1057 return; 1058 1059 /* Station client has higher priority over P2P client*/ 1060 if (vif->p2p && data->beacon_device_ts) 1061 return; 1062 1063 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1064 data->beacon_int = vif->bss_conf.beacon_int; 1065} 1066 1067/* 1068 * Fill the specific data for mac context of type AP of P2P GO 1069 */ 1070static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1071 struct ieee80211_vif *vif, 1072 struct iwl_mac_data_ap *ctxt_ap, 1073 bool add) 1074{ 1075 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1076 struct iwl_mvm_mac_ap_iterator_data data = { 1077 .mvm = mvm, 1078 .vif = vif, 1079 .beacon_device_ts = 0 1080 }; 1081 1082 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1083 ctxt_ap->bi_reciprocal = 1084 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1085 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1086 vif->bss_conf.dtim_period); 1087 ctxt_ap->dtim_reciprocal = 1088 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1089 vif->bss_conf.dtim_period)); 1090 1091 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1092 1093 /* 1094 * Only set the beacon time when the MAC is being added, when we 1095 * just modify the MAC then we should keep the time -- the firmware 1096 * can otherwise have a "jumping" TBTT. 1097 */ 1098 if (add) { 1099 /* 1100 * If there is a station/P2P client interface which is 1101 * associated, set the AP's TBTT far enough from the station's 1102 * TBTT. Otherwise, set it to the current system time 1103 */ 1104 ieee80211_iterate_active_interfaces_atomic( 1105 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1106 iwl_mvm_mac_ap_iterator, &data); 1107 1108 if (data.beacon_device_ts) { 1109 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1110 mvmvif->ap_beacon_time = data.beacon_device_ts + 1111 ieee80211_tu_to_usec(data.beacon_int * rand / 1112 100); 1113 } else { 1114 mvmvif->ap_beacon_time = 1115 iwl_read_prph(mvm->trans, 1116 DEVICE_SYSTEM_TIME_REG); 1117 } 1118 } 1119 1120 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1121 ctxt_ap->beacon_tsf = 0; /* unused */ 1122 1123 /* TODO: Assume that the beacon id == mac context id */ 1124 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1125} 1126 1127static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1128 struct ieee80211_vif *vif, 1129 u32 action) 1130{ 1131 struct iwl_mac_ctx_cmd cmd = {}; 1132 1133 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1134 1135 /* Fill the common data for all mac context types */ 1136 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1137 1138 /* 1139 * pass probe requests and beacons from other APs (needed 1140 * for ht protection) 1141 */ 1142 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST | 1143 MAC_FILTER_IN_BEACON); 1144 1145 /* Fill the data specific for ap mode */ 1146 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap, 1147 action == FW_CTXT_ACTION_ADD); 1148 1149 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1150} 1151 1152static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1153 struct ieee80211_vif *vif, 1154 u32 action) 1155{ 1156 struct iwl_mac_ctx_cmd cmd = {}; 1157 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1158 1159 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1160 1161 /* Fill the common data for all mac context types */ 1162 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1163 1164 /* 1165 * pass probe requests and beacons from other APs (needed 1166 * for ht protection) 1167 */ 1168 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST | 1169 MAC_FILTER_IN_BEACON); 1170 1171 /* Fill the data specific for GO mode */ 1172 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap, 1173 action == FW_CTXT_ACTION_ADD); 1174 1175 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1176 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1177 cmd.go.opp_ps_enabled = 1178 cpu_to_le32(!!(noa->oppps_ctwindow & 1179 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1180 1181 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1182} 1183 1184static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1185 u32 action, bool force_assoc_off, 1186 const u8 *bssid_override) 1187{ 1188 switch (vif->type) { 1189 case NL80211_IFTYPE_STATION: 1190 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1191 force_assoc_off, 1192 bssid_override); 1193 break; 1194 case NL80211_IFTYPE_AP: 1195 if (!vif->p2p) 1196 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1197 else 1198 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1199 break; 1200 case NL80211_IFTYPE_MONITOR: 1201 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1202 case NL80211_IFTYPE_P2P_DEVICE: 1203 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1204 case NL80211_IFTYPE_ADHOC: 1205 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1206 default: 1207 break; 1208 } 1209 1210 return -EOPNOTSUPP; 1211} 1212 1213int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1214{ 1215 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1216 int ret; 1217 1218 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1219 vif->addr, ieee80211_vif_type_p2p(vif))) 1220 return -EIO; 1221 1222 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1223 true, NULL); 1224 if (ret) 1225 return ret; 1226 1227 /* will only do anything at resume from D3 time */ 1228 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1229 1230 mvmvif->uploaded = true; 1231 return 0; 1232} 1233 1234int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1235 bool force_assoc_off, const u8 *bssid_override) 1236{ 1237 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1238 1239 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1240 vif->addr, ieee80211_vif_type_p2p(vif))) 1241 return -EIO; 1242 1243 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1244 force_assoc_off, bssid_override); 1245} 1246 1247int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1248{ 1249 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1250 struct iwl_mac_ctx_cmd cmd; 1251 int ret; 1252 1253 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1254 vif->addr, ieee80211_vif_type_p2p(vif))) 1255 return -EIO; 1256 1257 memset(&cmd, 0, sizeof(cmd)); 1258 1259 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1260 mvmvif->color)); 1261 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1262 1263 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1264 sizeof(cmd), &cmd); 1265 if (ret) { 1266 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1267 return ret; 1268 } 1269 1270 mvmvif->uploaded = false; 1271 1272 if (vif->type == NL80211_IFTYPE_MONITOR) 1273 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; 1274 1275 return 0; 1276} 1277 1278static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1279 struct ieee80211_vif *csa_vif, u32 gp2, 1280 bool tx_success) 1281{ 1282 struct iwl_mvm_vif *mvmvif = 1283 iwl_mvm_vif_from_mac80211(csa_vif); 1284 1285 /* Don't start to countdown from a failed beacon */ 1286 if (!tx_success && !mvmvif->csa_countdown) 1287 return; 1288 1289 mvmvif->csa_countdown = true; 1290 1291 if (!ieee80211_csa_is_complete(csa_vif)) { 1292 int c = ieee80211_csa_update_counter(csa_vif); 1293 1294 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1295 if (csa_vif->p2p && 1296 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1297 tx_success) { 1298 u32 rel_time = (c + 1) * 1299 csa_vif->bss_conf.beacon_int - 1300 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1301 u32 apply_time = gp2 + rel_time * 1024; 1302 1303 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1304 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1305 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1306 apply_time); 1307 } 1308 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1309 /* we don't have CSA NoA scheduled yet, switch now */ 1310 ieee80211_csa_finish(csa_vif); 1311 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1312 } 1313} 1314 1315int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1316 struct iwl_rx_cmd_buffer *rxb, 1317 struct iwl_device_cmd *cmd) 1318{ 1319 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1320 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1321 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1322 struct ieee80211_vif *csa_vif; 1323 struct ieee80211_vif *tx_blocked_vif; 1324 u16 status; 1325 1326 lockdep_assert_held(&mvm->mutex); 1327 1328 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1329 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1330 1331 status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK; 1332 IWL_DEBUG_RX(mvm, 1333 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1334 status, beacon_notify_hdr->failure_frame, 1335 le64_to_cpu(beacon->tsf), 1336 mvm->ap_last_beacon_gp2, 1337 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1338 1339 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1340 lockdep_is_held(&mvm->mutex)); 1341 if (unlikely(csa_vif && csa_vif->csa_active)) 1342 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1343 (status == TX_STATUS_SUCCESS)); 1344 1345 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1346 lockdep_is_held(&mvm->mutex)); 1347 if (unlikely(tx_blocked_vif)) { 1348 struct iwl_mvm_vif *mvmvif = 1349 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1350 1351 /* 1352 * The channel switch is started and we have blocked the 1353 * stations. If this is the first beacon (the timeout wasn't 1354 * set), set the unblock timeout, otherwise countdown 1355 */ 1356 if (!mvm->csa_tx_block_bcn_timeout) 1357 mvm->csa_tx_block_bcn_timeout = 1358 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1359 else 1360 mvm->csa_tx_block_bcn_timeout--; 1361 1362 /* Check if the timeout is expired, and unblock tx */ 1363 if (mvm->csa_tx_block_bcn_timeout == 0) { 1364 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1365 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1366 } 1367 } 1368 1369 return 0; 1370} 1371 1372static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1373 struct ieee80211_vif *vif) 1374{ 1375 struct iwl_missed_beacons_notif *missed_beacons = _data; 1376 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1377 struct iwl_mvm *mvm = mvmvif->mvm; 1378 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1379 struct iwl_fw_dbg_trigger_tlv *trigger; 1380 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1381 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1382 1383 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1384 return; 1385 1386 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1387 rx_missed_bcon_since_rx = 1388 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1389 /* 1390 * TODO: the threshold should be adjusted based on latency conditions, 1391 * and/or in case of a CS flow on one of the other AP vifs. 1392 */ 1393 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1394 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1395 ieee80211_beacon_loss(vif); 1396 1397 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1398 FW_DBG_TRIGGER_MISSED_BEACONS)) 1399 return; 1400 1401 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1402 FW_DBG_TRIGGER_MISSED_BEACONS); 1403 bcon_trig = (void *)trigger->data; 1404 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1405 stop_trig_missed_bcon_since_rx = 1406 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1407 1408 /* TODO: implement start trigger */ 1409 1410 if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) 1411 return; 1412 1413 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1414 rx_missed_bcon >= stop_trig_missed_bcon) 1415 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL); 1416} 1417 1418int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1419 struct iwl_rx_cmd_buffer *rxb, 1420 struct iwl_device_cmd *cmd) 1421{ 1422 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1423 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1424 1425 IWL_DEBUG_INFO(mvm, 1426 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1427 le32_to_cpu(mb->mac_id), 1428 le32_to_cpu(mb->consec_missed_beacons), 1429 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1430 le32_to_cpu(mb->num_recvd_beacons), 1431 le32_to_cpu(mb->num_expected_beacons)); 1432 1433 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1434 IEEE80211_IFACE_ITER_NORMAL, 1435 iwl_mvm_beacon_loss_iterator, 1436 mb); 1437 return 0; 1438} 1439