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