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 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 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 BIT(IWL_MVM_CMD_QUEUE), 257 }; 258 259 lockdep_assert_held(&mvm->mutex); 260 261 /* mark all VIF used hw queues */ 262 ieee80211_iterate_active_interfaces_atomic( 263 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 264 iwl_mvm_iface_hw_queues_iter, &data); 265 266 /* don't assign the same hw queues as TDLS stations */ 267 ieee80211_iterate_stations_atomic(mvm->hw, 268 iwl_mvm_mac_sta_hw_queues_iter, 269 &data); 270 271 /* 272 * Some TDLS stations may be removed but are in the process of being 273 * drained. Don't touch their queues. 274 */ 275 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) 276 data.used_hw_queues |= mvm->tfd_drained[sta_id]; 277 278 return data.used_hw_queues; 279 } 280 281 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 282 struct ieee80211_vif *vif) 283 { 284 struct iwl_mvm_mac_iface_iterator_data *data = _data; 285 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 286 287 /* Iterator may already find the interface being added -- skip it */ 288 if (vif == data->vif) { 289 data->found_vif = true; 290 return; 291 } 292 293 /* Mark MAC IDs as used by clearing the available bit, and 294 * (below) mark TSFs as used if their existing use is not 295 * compatible with the new interface type. 296 * No locking or atomic bit operations are needed since the 297 * data is on the stack of the caller function. 298 */ 299 __clear_bit(mvmvif->id, data->available_mac_ids); 300 301 /* find a suitable tsf_id */ 302 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 303 } 304 305 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 306 struct ieee80211_vif *vif) 307 { 308 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 309 struct iwl_mvm_mac_iface_iterator_data data = { 310 .mvm = mvm, 311 .vif = vif, 312 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 313 /* no preference yet */ 314 .preferred_tsf = NUM_TSF_IDS, 315 }; 316 317 ieee80211_iterate_active_interfaces_atomic( 318 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 319 iwl_mvm_mac_tsf_id_iter, &data); 320 321 if (data.preferred_tsf != NUM_TSF_IDS) 322 mvmvif->tsf_id = data.preferred_tsf; 323 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 324 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 325 NUM_TSF_IDS); 326 } 327 328 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, 329 struct ieee80211_vif *vif) 330 { 331 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 332 struct iwl_mvm_mac_iface_iterator_data data = { 333 .mvm = mvm, 334 .vif = vif, 335 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 336 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 337 /* no preference yet */ 338 .preferred_tsf = NUM_TSF_IDS, 339 .found_vif = false, 340 }; 341 u32 ac; 342 int ret, i; 343 unsigned long used_hw_queues; 344 345 /* 346 * Allocate a MAC ID and a TSF for this MAC, along with the queues 347 * and other resources. 348 */ 349 350 /* 351 * Before the iterator, we start with all MAC IDs and TSFs available. 352 * 353 * During iteration, all MAC IDs are cleared that are in use by other 354 * virtual interfaces, and all TSF IDs are cleared that can't be used 355 * by this new virtual interface because they're used by an interface 356 * that can't share it with the new one. 357 * At the same time, we check if there's a preferred TSF in the case 358 * that we should share it with another interface. 359 */ 360 361 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 362 switch (vif->type) { 363 case NL80211_IFTYPE_ADHOC: 364 break; 365 case NL80211_IFTYPE_STATION: 366 if (!vif->p2p) 367 break; 368 /* fall through */ 369 default: 370 __clear_bit(0, data.available_mac_ids); 371 } 372 373 ieee80211_iterate_active_interfaces_atomic( 374 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 375 iwl_mvm_mac_iface_iterator, &data); 376 377 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 378 379 /* 380 * In the case we're getting here during resume, it's similar to 381 * firmware restart, and with RESUME_ALL the iterator will find 382 * the vif being added already. 383 * We don't want to reassign any IDs in either case since doing 384 * so would probably assign different IDs (as interfaces aren't 385 * necessarily added in the same order), but the old IDs were 386 * preserved anyway, so skip ID assignment for both resume and 387 * recovery. 388 */ 389 if (data.found_vif) 390 return 0; 391 392 /* Therefore, in recovery, we can't get here */ 393 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 394 return -EBUSY; 395 396 mvmvif->id = find_first_bit(data.available_mac_ids, 397 NUM_MAC_INDEX_DRIVER); 398 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 399 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 400 ret = -EIO; 401 goto exit_fail; 402 } 403 404 if (data.preferred_tsf != NUM_TSF_IDS) 405 mvmvif->tsf_id = data.preferred_tsf; 406 else 407 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 408 NUM_TSF_IDS); 409 if (mvmvif->tsf_id == NUM_TSF_IDS) { 410 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 411 ret = -EIO; 412 goto exit_fail; 413 } 414 415 mvmvif->color = 0; 416 417 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 418 mvmvif->time_event_data.id = TE_MAX; 419 420 /* No need to allocate data queues to P2P Device MAC.*/ 421 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 422 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 423 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 424 425 return 0; 426 } 427 428 /* Find available queues, and allocate them to the ACs */ 429 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 430 u8 queue = find_first_zero_bit(&used_hw_queues, 431 mvm->first_agg_queue); 432 433 if (queue >= mvm->first_agg_queue) { 434 IWL_ERR(mvm, "Failed to allocate queue\n"); 435 ret = -EIO; 436 goto exit_fail; 437 } 438 439 __set_bit(queue, &used_hw_queues); 440 vif->hw_queue[ac] = queue; 441 } 442 443 /* Allocate the CAB queue for softAP and GO interfaces */ 444 if (vif->type == NL80211_IFTYPE_AP) { 445 u8 queue = find_first_zero_bit(&used_hw_queues, 446 mvm->first_agg_queue); 447 448 if (queue >= mvm->first_agg_queue) { 449 IWL_ERR(mvm, "Failed to allocate cab queue\n"); 450 ret = -EIO; 451 goto exit_fail; 452 } 453 454 vif->cab_queue = queue; 455 } else { 456 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 457 } 458 459 mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; 460 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 461 462 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 463 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 464 465 return 0; 466 467 exit_fail: 468 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 469 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 470 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 471 return ret; 472 } 473 474 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 475 { 476 unsigned int wdg_timeout = 477 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 478 u32 ac; 479 int ret; 480 481 lockdep_assert_held(&mvm->mutex); 482 483 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 484 if (ret) 485 return ret; 486 487 switch (vif->type) { 488 case NL80211_IFTYPE_P2P_DEVICE: 489 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 490 IWL_MVM_OFFCHANNEL_QUEUE, 491 IWL_MVM_TX_FIFO_VO, 0, wdg_timeout); 492 break; 493 case NL80211_IFTYPE_AP: 494 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue, 495 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 496 /* fall through */ 497 default: 498 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 499 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 500 vif->hw_queue[ac], 501 iwl_mvm_ac_to_tx_fifo[ac], 0, 502 wdg_timeout); 503 break; 504 } 505 506 return 0; 507 } 508 509 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 510 { 511 int ac; 512 513 lockdep_assert_held(&mvm->mutex); 514 515 switch (vif->type) { 516 case NL80211_IFTYPE_P2P_DEVICE: 517 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 518 IWL_MVM_OFFCHANNEL_QUEUE, IWL_MAX_TID_COUNT, 519 0); 520 break; 521 case NL80211_IFTYPE_AP: 522 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, 523 IWL_MAX_TID_COUNT, 0); 524 /* fall through */ 525 default: 526 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 527 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], 528 vif->hw_queue[ac], 529 IWL_MAX_TID_COUNT, 0); 530 } 531 } 532 533 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 534 struct ieee80211_vif *vif, 535 enum ieee80211_band band, 536 u8 *cck_rates, u8 *ofdm_rates) 537 { 538 struct ieee80211_supported_band *sband; 539 unsigned long basic = vif->bss_conf.basic_rates; 540 int lowest_present_ofdm = 100; 541 int lowest_present_cck = 100; 542 u8 cck = 0; 543 u8 ofdm = 0; 544 int i; 545 546 sband = mvm->hw->wiphy->bands[band]; 547 548 for_each_set_bit(i, &basic, BITS_PER_LONG) { 549 int hw = sband->bitrates[i].hw_value; 550 if (hw >= IWL_FIRST_OFDM_RATE) { 551 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 552 if (lowest_present_ofdm > hw) 553 lowest_present_ofdm = hw; 554 } else { 555 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 556 557 cck |= BIT(hw); 558 if (lowest_present_cck > hw) 559 lowest_present_cck = hw; 560 } 561 } 562 563 /* 564 * Now we've got the basic rates as bitmaps in the ofdm and cck 565 * variables. This isn't sufficient though, as there might not 566 * be all the right rates in the bitmap. E.g. if the only basic 567 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 568 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 569 * 570 * [...] a STA responding to a received frame shall transmit 571 * its Control Response frame [...] at the highest rate in the 572 * BSSBasicRateSet parameter that is less than or equal to the 573 * rate of the immediately previous frame in the frame exchange 574 * sequence ([...]) and that is of the same modulation class 575 * ([...]) as the received frame. If no rate contained in the 576 * BSSBasicRateSet parameter meets these conditions, then the 577 * control frame sent in response to a received frame shall be 578 * transmitted at the highest mandatory rate of the PHY that is 579 * less than or equal to the rate of the received frame, and 580 * that is of the same modulation class as the received frame. 581 * 582 * As a consequence, we need to add all mandatory rates that are 583 * lower than all of the basic rates to these bitmaps. 584 */ 585 586 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 587 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 588 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 589 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 590 /* 6M already there or needed so always add */ 591 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 592 593 /* 594 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 595 * Note, however: 596 * - if no CCK rates are basic, it must be ERP since there must 597 * be some basic rates at all, so they're OFDM => ERP PHY 598 * (or we're in 5 GHz, and the cck bitmap will never be used) 599 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 600 * - if 5.5M is basic, 1M and 2M are mandatory 601 * - if 2M is basic, 1M is mandatory 602 * - if 1M is basic, that's the only valid ACK rate. 603 * As a consequence, it's not as complicated as it sounds, just add 604 * any lower rates to the ACK rate bitmap. 605 */ 606 if (IWL_RATE_11M_INDEX < lowest_present_cck) 607 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 608 if (IWL_RATE_5M_INDEX < lowest_present_cck) 609 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 610 if (IWL_RATE_2M_INDEX < lowest_present_cck) 611 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 612 /* 1M already there or needed so always add */ 613 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 614 615 *cck_rates = cck; 616 *ofdm_rates = ofdm; 617 } 618 619 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 620 struct ieee80211_vif *vif, 621 struct iwl_mac_ctx_cmd *cmd) 622 { 623 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 624 u8 protection_mode = vif->bss_conf.ht_operation_mode & 625 IEEE80211_HT_OP_MODE_PROTECTION; 626 /* The fw does not distinguish between ht and fat */ 627 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 628 629 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 630 /* 631 * See section 9.23.3.1 of IEEE 80211-2012. 632 * Nongreenfield HT STAs Present is not supported. 633 */ 634 switch (protection_mode) { 635 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 636 break; 637 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 638 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 639 cmd->protection_flags |= cpu_to_le32(ht_flag); 640 break; 641 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 642 /* Protect when channel wider than 20MHz */ 643 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 644 cmd->protection_flags |= cpu_to_le32(ht_flag); 645 break; 646 default: 647 IWL_ERR(mvm, "Illegal protection mode %d\n", 648 protection_mode); 649 break; 650 } 651 } 652 653 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 654 struct ieee80211_vif *vif, 655 struct iwl_mac_ctx_cmd *cmd, 656 const u8 *bssid_override, 657 u32 action) 658 { 659 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 660 struct ieee80211_chanctx_conf *chanctx; 661 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 662 IEEE80211_HT_OP_MODE_PROTECTION); 663 u8 cck_ack_rates, ofdm_ack_rates; 664 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 665 int i; 666 667 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 668 mvmvif->color)); 669 cmd->action = cpu_to_le32(action); 670 671 switch (vif->type) { 672 case NL80211_IFTYPE_STATION: 673 if (vif->p2p) 674 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 675 else 676 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 677 break; 678 case NL80211_IFTYPE_AP: 679 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 680 break; 681 case NL80211_IFTYPE_MONITOR: 682 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 683 break; 684 case NL80211_IFTYPE_P2P_DEVICE: 685 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 686 break; 687 case NL80211_IFTYPE_ADHOC: 688 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 689 break; 690 default: 691 WARN_ON_ONCE(1); 692 } 693 694 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 695 696 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 697 698 if (bssid) 699 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 700 else 701 eth_broadcast_addr(cmd->bssid_addr); 702 703 rcu_read_lock(); 704 chanctx = rcu_dereference(vif->chanctx_conf); 705 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 706 : IEEE80211_BAND_2GHZ, 707 &cck_ack_rates, &ofdm_ack_rates); 708 rcu_read_unlock(); 709 710 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 711 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 712 713 cmd->cck_short_preamble = 714 cpu_to_le32(vif->bss_conf.use_short_preamble ? 715 MAC_FLG_SHORT_PREAMBLE : 0); 716 cmd->short_slot = 717 cpu_to_le32(vif->bss_conf.use_short_slot ? 718 MAC_FLG_SHORT_SLOT : 0); 719 720 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 721 722 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 723 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 724 725 cmd->ac[txf].cw_min = 726 cpu_to_le16(mvmvif->queue_params[i].cw_min); 727 cmd->ac[txf].cw_max = 728 cpu_to_le16(mvmvif->queue_params[i].cw_max); 729 cmd->ac[txf].edca_txop = 730 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 731 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 732 cmd->ac[txf].fifos_mask = BIT(txf); 733 } 734 735 if (vif->type == NL80211_IFTYPE_AP) { 736 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 737 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= 738 BIT(IWL_MVM_TX_FIFO_MCAST); 739 740 /* 741 * in AP mode, pass probe requests and beacons from other APs 742 * (needed for ht protection); when there're no any associated 743 * station don't ask FW to pass beacons to prevent unnecessary 744 * wake-ups. 745 */ 746 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 747 if (mvmvif->ap_assoc_sta_count) { 748 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 749 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 750 } else { 751 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 752 } 753 } 754 755 if (vif->bss_conf.qos) 756 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 757 758 if (vif->bss_conf.use_cts_prot) 759 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 760 761 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 762 vif->bss_conf.use_cts_prot, 763 vif->bss_conf.ht_operation_mode); 764 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 765 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 766 if (ht_enabled) 767 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 768 } 769 770 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 771 struct iwl_mac_ctx_cmd *cmd) 772 { 773 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 774 sizeof(*cmd), cmd); 775 if (ret) 776 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 777 le32_to_cpu(cmd->action), ret); 778 return ret; 779 } 780 781 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 782 struct ieee80211_vif *vif, 783 u32 action, bool force_assoc_off, 784 const u8 *bssid_override) 785 { 786 struct iwl_mac_ctx_cmd cmd = {}; 787 struct iwl_mac_data_sta *ctxt_sta; 788 789 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 790 791 /* Fill the common data for all mac context types */ 792 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 793 794 if (vif->p2p) { 795 struct ieee80211_p2p_noa_attr *noa = 796 &vif->bss_conf.p2p_noa_attr; 797 798 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 799 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 800 ctxt_sta = &cmd.p2p_sta.sta; 801 } else { 802 ctxt_sta = &cmd.sta; 803 } 804 805 /* We need the dtim_period to set the MAC as associated */ 806 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 807 !force_assoc_off) { 808 u32 dtim_offs; 809 810 /* 811 * The DTIM count counts down, so when it is N that means N 812 * more beacon intervals happen until the DTIM TBTT. Therefore 813 * add this to the current time. If that ends up being in the 814 * future, the firmware will handle it. 815 * 816 * Also note that the system_timestamp (which we get here as 817 * "sync_device_ts") and TSF timestamp aren't at exactly the 818 * same offset in the frame -- the TSF is at the first symbol 819 * of the TSF, the system timestamp is at signal acquisition 820 * time. This means there's an offset between them of at most 821 * a few hundred microseconds (24 * 8 bits + PLCP time gives 822 * 384us in the longest case), this is currently not relevant 823 * as the firmware wakes up around 2ms before the TBTT. 824 */ 825 dtim_offs = vif->bss_conf.sync_dtim_count * 826 vif->bss_conf.beacon_int; 827 /* convert TU to usecs */ 828 dtim_offs *= 1024; 829 830 ctxt_sta->dtim_tsf = 831 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 832 ctxt_sta->dtim_time = 833 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 834 835 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 836 le64_to_cpu(ctxt_sta->dtim_tsf), 837 le32_to_cpu(ctxt_sta->dtim_time), 838 dtim_offs); 839 840 ctxt_sta->is_assoc = cpu_to_le32(1); 841 } else { 842 ctxt_sta->is_assoc = cpu_to_le32(0); 843 844 /* Allow beacons to pass through as long as we are not 845 * associated, or we do not have dtim period information. 846 */ 847 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 848 } 849 850 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 851 ctxt_sta->bi_reciprocal = 852 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 853 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 854 vif->bss_conf.dtim_period); 855 ctxt_sta->dtim_reciprocal = 856 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 857 vif->bss_conf.dtim_period)); 858 859 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 860 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 861 862 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 863 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 864 865 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 866 } 867 868 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 869 struct ieee80211_vif *vif, 870 u32 action) 871 { 872 struct iwl_mac_ctx_cmd cmd = {}; 873 u32 tfd_queue_msk = 0; 874 int ret, i; 875 876 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 877 878 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 879 880 for (i = 0; i < IEEE80211_NUM_ACS; i++) 881 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 882 tfd_queue_msk |= BIT(vif->hw_queue[i]); 883 884 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 885 MAC_FILTER_IN_CONTROL_AND_MGMT | 886 MAC_FILTER_IN_BEACON | 887 MAC_FILTER_IN_PROBE_REQUEST | 888 MAC_FILTER_IN_CRC32); 889 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 890 891 /* Allocate sniffer station */ 892 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 893 vif->type); 894 if (ret) 895 return ret; 896 897 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 898 } 899 900 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 901 struct ieee80211_vif *vif, 902 u32 action) 903 { 904 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 905 struct iwl_mac_ctx_cmd cmd = {}; 906 907 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 908 909 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 910 911 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 912 MAC_FILTER_IN_PROBE_REQUEST); 913 914 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 915 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 916 cmd.ibss.bi_reciprocal = 917 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 918 919 /* TODO: Assumes that the beacon id == mac context id */ 920 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 921 922 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 923 } 924 925 struct iwl_mvm_go_iterator_data { 926 bool go_active; 927 }; 928 929 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 930 { 931 struct iwl_mvm_go_iterator_data *data = _data; 932 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 933 934 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 935 mvmvif->ap_ibss_active) 936 data->go_active = true; 937 } 938 939 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 940 struct ieee80211_vif *vif, 941 u32 action) 942 { 943 struct iwl_mac_ctx_cmd cmd = {}; 944 struct iwl_mvm_go_iterator_data data = {}; 945 946 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 947 948 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 949 950 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 951 952 /* Override the filter flags to accept only probe requests */ 953 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 954 955 /* 956 * This flag should be set to true when the P2P Device is 957 * discoverable and there is at least another active P2P GO. Settings 958 * this flag will allow the P2P Device to be discoverable on other 959 * channels in addition to its listen channel. 960 * Note that this flag should not be set in other cases as it opens the 961 * Rx filters on all MAC and increases the number of interrupts. 962 */ 963 ieee80211_iterate_active_interfaces_atomic( 964 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 965 iwl_mvm_go_iterator, &data); 966 967 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 968 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 969 } 970 971 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 972 struct iwl_mac_beacon_cmd *beacon_cmd, 973 u8 *beacon, u32 frame_size) 974 { 975 u32 tim_idx; 976 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 977 978 /* The index is relative to frame start but we start looking at the 979 * variable-length part of the beacon. */ 980 tim_idx = mgmt->u.beacon.variable - beacon; 981 982 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 983 while ((tim_idx < (frame_size - 2)) && 984 (beacon[tim_idx] != WLAN_EID_TIM)) 985 tim_idx += beacon[tim_idx+1] + 2; 986 987 /* If TIM field was found, set variables */ 988 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 989 beacon_cmd->tim_idx = cpu_to_le32(tim_idx); 990 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]); 991 } else { 992 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 993 } 994 } 995 996 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 997 struct ieee80211_vif *vif, 998 struct sk_buff *beacon) 999 { 1000 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1001 struct iwl_host_cmd cmd = { 1002 .id = BEACON_TEMPLATE_CMD, 1003 .flags = CMD_ASYNC, 1004 }; 1005 struct iwl_mac_beacon_cmd beacon_cmd = {}; 1006 struct ieee80211_tx_info *info; 1007 u32 beacon_skb_len; 1008 u32 rate, tx_flags; 1009 1010 if (WARN_ON(!beacon)) 1011 return -EINVAL; 1012 1013 beacon_skb_len = beacon->len; 1014 1015 /* TODO: for now the beacon template id is set to be the mac context id. 1016 * Might be better to handle it as another resource ... */ 1017 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1018 info = IEEE80211_SKB_CB(beacon); 1019 1020 /* Set up TX command fields */ 1021 beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len); 1022 beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id; 1023 beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 1024 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 1025 tx_flags |= 1026 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 1027 TX_CMD_FLG_BT_PRIO_POS; 1028 beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags); 1029 1030 if (!fw_has_capa(&mvm->fw->ucode_capa, 1031 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 1032 mvm->mgmt_last_antenna_idx = 1033 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 1034 mvm->mgmt_last_antenna_idx); 1035 } 1036 1037 beacon_cmd.tx.rate_n_flags = 1038 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 1039 RATE_MCS_ANT_POS); 1040 1041 if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) { 1042 rate = IWL_FIRST_OFDM_RATE; 1043 } else { 1044 rate = IWL_FIRST_CCK_RATE; 1045 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); 1046 } 1047 beacon_cmd.tx.rate_n_flags |= 1048 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 1049 1050 /* Set up TX beacon command fields */ 1051 if (vif->type == NL80211_IFTYPE_AP) 1052 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd, 1053 beacon->data, 1054 beacon_skb_len); 1055 1056 /* Submit command */ 1057 cmd.len[0] = sizeof(beacon_cmd); 1058 cmd.data[0] = &beacon_cmd; 1059 cmd.dataflags[0] = 0; 1060 cmd.len[1] = beacon_skb_len; 1061 cmd.data[1] = beacon->data; 1062 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1063 1064 return iwl_mvm_send_cmd(mvm, &cmd); 1065 } 1066 1067 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1068 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1069 struct ieee80211_vif *vif) 1070 { 1071 struct sk_buff *beacon; 1072 int ret; 1073 1074 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1075 vif->type != NL80211_IFTYPE_ADHOC); 1076 1077 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1078 if (!beacon) 1079 return -ENOMEM; 1080 1081 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1082 dev_kfree_skb(beacon); 1083 return ret; 1084 } 1085 1086 struct iwl_mvm_mac_ap_iterator_data { 1087 struct iwl_mvm *mvm; 1088 struct ieee80211_vif *vif; 1089 u32 beacon_device_ts; 1090 u16 beacon_int; 1091 }; 1092 1093 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1094 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1095 struct ieee80211_vif *vif) 1096 { 1097 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1098 1099 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1100 return; 1101 1102 /* Station client has higher priority over P2P client*/ 1103 if (vif->p2p && data->beacon_device_ts) 1104 return; 1105 1106 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1107 data->beacon_int = vif->bss_conf.beacon_int; 1108 } 1109 1110 /* 1111 * Fill the specific data for mac context of type AP of P2P GO 1112 */ 1113 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1114 struct ieee80211_vif *vif, 1115 struct iwl_mac_data_ap *ctxt_ap, 1116 bool add) 1117 { 1118 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1119 struct iwl_mvm_mac_ap_iterator_data data = { 1120 .mvm = mvm, 1121 .vif = vif, 1122 .beacon_device_ts = 0 1123 }; 1124 1125 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1126 ctxt_ap->bi_reciprocal = 1127 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1128 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1129 vif->bss_conf.dtim_period); 1130 ctxt_ap->dtim_reciprocal = 1131 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1132 vif->bss_conf.dtim_period)); 1133 1134 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1135 1136 /* 1137 * Only set the beacon time when the MAC is being added, when we 1138 * just modify the MAC then we should keep the time -- the firmware 1139 * can otherwise have a "jumping" TBTT. 1140 */ 1141 if (add) { 1142 /* 1143 * If there is a station/P2P client interface which is 1144 * associated, set the AP's TBTT far enough from the station's 1145 * TBTT. Otherwise, set it to the current system time 1146 */ 1147 ieee80211_iterate_active_interfaces_atomic( 1148 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1149 iwl_mvm_mac_ap_iterator, &data); 1150 1151 if (data.beacon_device_ts) { 1152 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1153 mvmvif->ap_beacon_time = data.beacon_device_ts + 1154 ieee80211_tu_to_usec(data.beacon_int * rand / 1155 100); 1156 } else { 1157 mvmvif->ap_beacon_time = 1158 iwl_read_prph(mvm->trans, 1159 DEVICE_SYSTEM_TIME_REG); 1160 } 1161 } 1162 1163 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1164 ctxt_ap->beacon_tsf = 0; /* unused */ 1165 1166 /* TODO: Assume that the beacon id == mac context id */ 1167 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1168 } 1169 1170 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1171 struct ieee80211_vif *vif, 1172 u32 action) 1173 { 1174 struct iwl_mac_ctx_cmd cmd = {}; 1175 1176 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1177 1178 /* Fill the common data for all mac context types */ 1179 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1180 1181 /* Fill the data specific for ap mode */ 1182 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap, 1183 action == FW_CTXT_ACTION_ADD); 1184 1185 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1186 } 1187 1188 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1189 struct ieee80211_vif *vif, 1190 u32 action) 1191 { 1192 struct iwl_mac_ctx_cmd cmd = {}; 1193 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1194 1195 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1196 1197 /* Fill the common data for all mac context types */ 1198 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1199 1200 /* Fill the data specific for GO mode */ 1201 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap, 1202 action == FW_CTXT_ACTION_ADD); 1203 1204 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1205 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1206 cmd.go.opp_ps_enabled = 1207 cpu_to_le32(!!(noa->oppps_ctwindow & 1208 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1209 1210 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1211 } 1212 1213 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1214 u32 action, bool force_assoc_off, 1215 const u8 *bssid_override) 1216 { 1217 switch (vif->type) { 1218 case NL80211_IFTYPE_STATION: 1219 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1220 force_assoc_off, 1221 bssid_override); 1222 break; 1223 case NL80211_IFTYPE_AP: 1224 if (!vif->p2p) 1225 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1226 else 1227 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1228 break; 1229 case NL80211_IFTYPE_MONITOR: 1230 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1231 case NL80211_IFTYPE_P2P_DEVICE: 1232 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1233 case NL80211_IFTYPE_ADHOC: 1234 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1235 default: 1236 break; 1237 } 1238 1239 return -EOPNOTSUPP; 1240 } 1241 1242 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1243 { 1244 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1245 int ret; 1246 1247 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1248 vif->addr, ieee80211_vif_type_p2p(vif))) 1249 return -EIO; 1250 1251 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1252 true, NULL); 1253 if (ret) 1254 return ret; 1255 1256 /* will only do anything at resume from D3 time */ 1257 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1258 1259 mvmvif->uploaded = true; 1260 return 0; 1261 } 1262 1263 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1264 bool force_assoc_off, const u8 *bssid_override) 1265 { 1266 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1267 1268 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1269 vif->addr, ieee80211_vif_type_p2p(vif))) 1270 return -EIO; 1271 1272 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1273 force_assoc_off, bssid_override); 1274 } 1275 1276 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1277 { 1278 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1279 struct iwl_mac_ctx_cmd cmd; 1280 int ret; 1281 1282 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1283 vif->addr, ieee80211_vif_type_p2p(vif))) 1284 return -EIO; 1285 1286 memset(&cmd, 0, sizeof(cmd)); 1287 1288 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1289 mvmvif->color)); 1290 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1291 1292 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1293 sizeof(cmd), &cmd); 1294 if (ret) { 1295 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1296 return ret; 1297 } 1298 1299 mvmvif->uploaded = false; 1300 1301 if (vif->type == NL80211_IFTYPE_MONITOR) { 1302 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1303 iwl_mvm_dealloc_snif_sta(mvm); 1304 } 1305 1306 return 0; 1307 } 1308 1309 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1310 struct ieee80211_vif *csa_vif, u32 gp2, 1311 bool tx_success) 1312 { 1313 struct iwl_mvm_vif *mvmvif = 1314 iwl_mvm_vif_from_mac80211(csa_vif); 1315 1316 /* Don't start to countdown from a failed beacon */ 1317 if (!tx_success && !mvmvif->csa_countdown) 1318 return; 1319 1320 mvmvif->csa_countdown = true; 1321 1322 if (!ieee80211_csa_is_complete(csa_vif)) { 1323 int c = ieee80211_csa_update_counter(csa_vif); 1324 1325 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1326 if (csa_vif->p2p && 1327 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1328 tx_success) { 1329 u32 rel_time = (c + 1) * 1330 csa_vif->bss_conf.beacon_int - 1331 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1332 u32 apply_time = gp2 + rel_time * 1024; 1333 1334 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1335 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1336 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1337 apply_time); 1338 } 1339 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1340 /* we don't have CSA NoA scheduled yet, switch now */ 1341 ieee80211_csa_finish(csa_vif); 1342 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1343 } 1344 } 1345 1346 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1347 struct iwl_rx_cmd_buffer *rxb) 1348 { 1349 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1350 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1351 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1352 struct ieee80211_vif *csa_vif; 1353 struct ieee80211_vif *tx_blocked_vif; 1354 u16 status; 1355 1356 lockdep_assert_held(&mvm->mutex); 1357 1358 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1359 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1360 1361 status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK; 1362 IWL_DEBUG_RX(mvm, 1363 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1364 status, beacon_notify_hdr->failure_frame, 1365 le64_to_cpu(beacon->tsf), 1366 mvm->ap_last_beacon_gp2, 1367 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1368 1369 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1370 lockdep_is_held(&mvm->mutex)); 1371 if (unlikely(csa_vif && csa_vif->csa_active)) 1372 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1373 (status == TX_STATUS_SUCCESS)); 1374 1375 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1376 lockdep_is_held(&mvm->mutex)); 1377 if (unlikely(tx_blocked_vif)) { 1378 struct iwl_mvm_vif *mvmvif = 1379 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1380 1381 /* 1382 * The channel switch is started and we have blocked the 1383 * stations. If this is the first beacon (the timeout wasn't 1384 * set), set the unblock timeout, otherwise countdown 1385 */ 1386 if (!mvm->csa_tx_block_bcn_timeout) 1387 mvm->csa_tx_block_bcn_timeout = 1388 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1389 else 1390 mvm->csa_tx_block_bcn_timeout--; 1391 1392 /* Check if the timeout is expired, and unblock tx */ 1393 if (mvm->csa_tx_block_bcn_timeout == 0) { 1394 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1395 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1396 } 1397 } 1398 } 1399 1400 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1401 struct ieee80211_vif *vif) 1402 { 1403 struct iwl_missed_beacons_notif *missed_beacons = _data; 1404 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1405 struct iwl_mvm *mvm = mvmvif->mvm; 1406 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1407 struct iwl_fw_dbg_trigger_tlv *trigger; 1408 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1409 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1410 1411 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1412 return; 1413 1414 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1415 rx_missed_bcon_since_rx = 1416 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1417 /* 1418 * TODO: the threshold should be adjusted based on latency conditions, 1419 * and/or in case of a CS flow on one of the other AP vifs. 1420 */ 1421 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1422 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1423 ieee80211_beacon_loss(vif); 1424 1425 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1426 FW_DBG_TRIGGER_MISSED_BEACONS)) 1427 return; 1428 1429 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1430 FW_DBG_TRIGGER_MISSED_BEACONS); 1431 bcon_trig = (void *)trigger->data; 1432 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1433 stop_trig_missed_bcon_since_rx = 1434 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1435 1436 /* TODO: implement start trigger */ 1437 1438 if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) 1439 return; 1440 1441 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1442 rx_missed_bcon >= stop_trig_missed_bcon) 1443 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL); 1444 } 1445 1446 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1447 struct iwl_rx_cmd_buffer *rxb) 1448 { 1449 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1450 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1451 1452 IWL_DEBUG_INFO(mvm, 1453 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1454 le32_to_cpu(mb->mac_id), 1455 le32_to_cpu(mb->consec_missed_beacons), 1456 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1457 le32_to_cpu(mb->num_recvd_beacons), 1458 le32_to_cpu(mb->num_expected_beacons)); 1459 1460 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1461 IEEE80211_IFACE_ITER_NORMAL, 1462 iwl_mvm_beacon_loss_iterator, 1463 mb); 1464 } 1465