1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 33 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 65 #include <linux/etherdevice.h> 66 #include <net/mac80211.h> 67 #include "iwl-io.h" 68 #include "iwl-prph.h" 69 #include "fw-api.h" 70 #include "mvm.h" 71 #include "time-event.h" 72 73 const u8 iwl_mvm_ac_to_tx_fifo[] = { 74 IWL_MVM_TX_FIFO_VO, 75 IWL_MVM_TX_FIFO_VI, 76 IWL_MVM_TX_FIFO_BE, 77 IWL_MVM_TX_FIFO_BK, 78 }; 79 80 const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = { 81 IWL_GEN2_EDCA_TX_FIFO_VO, 82 IWL_GEN2_EDCA_TX_FIFO_VI, 83 IWL_GEN2_EDCA_TX_FIFO_BE, 84 IWL_GEN2_EDCA_TX_FIFO_BK, 85 IWL_GEN2_TRIG_TX_FIFO_VO, 86 IWL_GEN2_TRIG_TX_FIFO_VI, 87 IWL_GEN2_TRIG_TX_FIFO_BE, 88 IWL_GEN2_TRIG_TX_FIFO_BK, 89 }; 90 91 struct iwl_mvm_mac_iface_iterator_data { 92 struct iwl_mvm *mvm; 93 struct ieee80211_vif *vif; 94 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; 95 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; 96 enum iwl_tsf_id preferred_tsf; 97 bool found_vif; 98 }; 99 100 struct iwl_mvm_hw_queues_iface_iterator_data { 101 struct ieee80211_vif *exclude_vif; 102 unsigned long used_hw_queues; 103 }; 104 105 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 106 struct ieee80211_vif *vif) 107 { 108 struct iwl_mvm_mac_iface_iterator_data *data = _data; 109 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 110 u16 min_bi; 111 112 /* Skip the interface for which we are trying to assign a tsf_id */ 113 if (vif == data->vif) 114 return; 115 116 /* 117 * The TSF is a hardware/firmware resource, there are 4 and 118 * the driver should assign and free them as needed. However, 119 * there are cases where 2 MACs should share the same TSF ID 120 * for the purpose of clock sync, an optimization to avoid 121 * clock drift causing overlapping TBTTs/DTIMs for a GO and 122 * client in the system. 123 * 124 * The firmware will decide according to the MAC type which 125 * will be the master and slave. Clients that need to sync 126 * with a remote station will be the master, and an AP or GO 127 * will be the slave. 128 * 129 * Depending on the new interface type it can be slaved to 130 * or become the master of an existing interface. 131 */ 132 switch (data->vif->type) { 133 case NL80211_IFTYPE_STATION: 134 /* 135 * The new interface is a client, so if the one we're iterating 136 * is an AP, and the beacon interval of the AP is a multiple or 137 * divisor of the beacon interval of the client, the same TSF 138 * should be used to avoid drift between the new client and 139 * existing AP. The existing AP will get drift updates from the 140 * new client context in this case. 141 */ 142 if (vif->type != NL80211_IFTYPE_AP || 143 data->preferred_tsf != NUM_TSF_IDS || 144 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 145 break; 146 147 min_bi = min(data->vif->bss_conf.beacon_int, 148 vif->bss_conf.beacon_int); 149 150 if (!min_bi) 151 break; 152 153 if ((data->vif->bss_conf.beacon_int - 154 vif->bss_conf.beacon_int) % min_bi == 0) { 155 data->preferred_tsf = mvmvif->tsf_id; 156 return; 157 } 158 break; 159 160 case NL80211_IFTYPE_AP: 161 /* 162 * The new interface is AP/GO, so if its beacon interval is a 163 * multiple or a divisor of the beacon interval of an existing 164 * interface, it should get drift updates from an existing 165 * client or use the same TSF as an existing GO. There's no 166 * drift between TSFs internally but if they used different 167 * TSFs then a new client MAC could update one of them and 168 * cause drift that way. 169 */ 170 if ((vif->type != NL80211_IFTYPE_AP && 171 vif->type != NL80211_IFTYPE_STATION) || 172 data->preferred_tsf != NUM_TSF_IDS || 173 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 174 break; 175 176 min_bi = min(data->vif->bss_conf.beacon_int, 177 vif->bss_conf.beacon_int); 178 179 if (!min_bi) 180 break; 181 182 if ((data->vif->bss_conf.beacon_int - 183 vif->bss_conf.beacon_int) % min_bi == 0) { 184 data->preferred_tsf = mvmvif->tsf_id; 185 return; 186 } 187 break; 188 default: 189 /* 190 * For all other interface types there's no need to 191 * take drift into account. Either they're exclusive 192 * like IBSS and monitor, or we don't care much about 193 * their TSF (like P2P Device), but we won't be able 194 * to share the TSF resource. 195 */ 196 break; 197 } 198 199 /* 200 * Unless we exited above, we can't share the TSF resource 201 * that the virtual interface we're iterating over is using 202 * with the new one, so clear the available bit and if this 203 * was the preferred one, reset that as well. 204 */ 205 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 206 207 if (data->preferred_tsf == mvmvif->tsf_id) 208 data->preferred_tsf = NUM_TSF_IDS; 209 } 210 211 /* 212 * Get the mask of the queues used by the vif 213 */ 214 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif) 215 { 216 u32 qmask = 0, ac; 217 218 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 219 return BIT(IWL_MVM_OFFCHANNEL_QUEUE); 220 221 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 222 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 223 qmask |= BIT(vif->hw_queue[ac]); 224 } 225 226 if (vif->type == NL80211_IFTYPE_AP || 227 vif->type == NL80211_IFTYPE_ADHOC) 228 qmask |= BIT(vif->cab_queue); 229 230 return qmask; 231 } 232 233 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, 234 struct ieee80211_vif *vif) 235 { 236 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 237 238 /* exclude the given vif */ 239 if (vif == data->exclude_vif) 240 return; 241 242 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); 243 } 244 245 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, 246 struct ieee80211_vif *exclude_vif) 247 { 248 struct iwl_mvm_hw_queues_iface_iterator_data data = { 249 .exclude_vif = exclude_vif, 250 .used_hw_queues = 251 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 252 BIT(mvm->aux_queue) | 253 BIT(IWL_MVM_DQA_GCAST_QUEUE), 254 }; 255 256 lockdep_assert_held(&mvm->mutex); 257 258 /* mark all VIF used hw queues */ 259 ieee80211_iterate_active_interfaces_atomic( 260 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 261 iwl_mvm_iface_hw_queues_iter, &data); 262 263 return data.used_hw_queues; 264 } 265 266 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 267 struct ieee80211_vif *vif) 268 { 269 struct iwl_mvm_mac_iface_iterator_data *data = _data; 270 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 271 272 /* Iterator may already find the interface being added -- skip it */ 273 if (vif == data->vif) { 274 data->found_vif = true; 275 return; 276 } 277 278 /* Mark MAC IDs as used by clearing the available bit, and 279 * (below) mark TSFs as used if their existing use is not 280 * compatible with the new interface type. 281 * No locking or atomic bit operations are needed since the 282 * data is on the stack of the caller function. 283 */ 284 __clear_bit(mvmvif->id, data->available_mac_ids); 285 286 /* find a suitable tsf_id */ 287 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 288 } 289 290 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 291 struct ieee80211_vif *vif) 292 { 293 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 294 struct iwl_mvm_mac_iface_iterator_data data = { 295 .mvm = mvm, 296 .vif = vif, 297 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 298 /* no preference yet */ 299 .preferred_tsf = NUM_TSF_IDS, 300 }; 301 302 ieee80211_iterate_active_interfaces_atomic( 303 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 304 iwl_mvm_mac_tsf_id_iter, &data); 305 306 if (data.preferred_tsf != NUM_TSF_IDS) 307 mvmvif->tsf_id = data.preferred_tsf; 308 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 309 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 310 NUM_TSF_IDS); 311 } 312 313 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 314 { 315 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 316 struct iwl_mvm_mac_iface_iterator_data data = { 317 .mvm = mvm, 318 .vif = vif, 319 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 320 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 321 /* no preference yet */ 322 .preferred_tsf = NUM_TSF_IDS, 323 .found_vif = false, 324 }; 325 u32 ac; 326 int ret, i, queue_limit; 327 unsigned long used_hw_queues; 328 329 lockdep_assert_held(&mvm->mutex); 330 331 /* 332 * Allocate a MAC ID and a TSF for this MAC, along with the queues 333 * and other resources. 334 */ 335 336 /* 337 * Before the iterator, we start with all MAC IDs and TSFs available. 338 * 339 * During iteration, all MAC IDs are cleared that are in use by other 340 * virtual interfaces, and all TSF IDs are cleared that can't be used 341 * by this new virtual interface because they're used by an interface 342 * that can't share it with the new one. 343 * At the same time, we check if there's a preferred TSF in the case 344 * that we should share it with another interface. 345 */ 346 347 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 348 switch (vif->type) { 349 case NL80211_IFTYPE_ADHOC: 350 break; 351 case NL80211_IFTYPE_STATION: 352 if (!vif->p2p) 353 break; 354 /* fall through */ 355 default: 356 __clear_bit(0, data.available_mac_ids); 357 } 358 359 ieee80211_iterate_active_interfaces_atomic( 360 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 361 iwl_mvm_mac_iface_iterator, &data); 362 363 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 364 365 /* 366 * In the case we're getting here during resume, it's similar to 367 * firmware restart, and with RESUME_ALL the iterator will find 368 * the vif being added already. 369 * We don't want to reassign any IDs in either case since doing 370 * so would probably assign different IDs (as interfaces aren't 371 * necessarily added in the same order), but the old IDs were 372 * preserved anyway, so skip ID assignment for both resume and 373 * recovery. 374 */ 375 if (data.found_vif) 376 return 0; 377 378 /* Therefore, in recovery, we can't get here */ 379 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 380 return -EBUSY; 381 382 mvmvif->id = find_first_bit(data.available_mac_ids, 383 NUM_MAC_INDEX_DRIVER); 384 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 385 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 386 ret = -EIO; 387 goto exit_fail; 388 } 389 390 if (data.preferred_tsf != NUM_TSF_IDS) 391 mvmvif->tsf_id = data.preferred_tsf; 392 else 393 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 394 NUM_TSF_IDS); 395 if (mvmvif->tsf_id == NUM_TSF_IDS) { 396 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 397 ret = -EIO; 398 goto exit_fail; 399 } 400 401 mvmvif->color = 0; 402 403 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 404 mvmvif->time_event_data.id = TE_MAX; 405 406 /* No need to allocate data queues to P2P Device MAC.*/ 407 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 408 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 409 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 410 411 return 0; 412 } 413 414 /* 415 * queues in mac80211 almost entirely independent of 416 * the ones here - no real limit 417 */ 418 queue_limit = IEEE80211_MAX_QUEUES; 419 BUILD_BUG_ON(IEEE80211_MAX_QUEUES > 420 BITS_PER_BYTE * 421 sizeof(mvm->hw_queue_to_mac80211[0])); 422 423 /* 424 * Find available queues, and allocate them to the ACs. When in 425 * DQA-mode they aren't really used, and this is done only so the 426 * mac80211 ieee80211_check_queues() function won't fail 427 */ 428 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 429 u8 queue = find_first_zero_bit(&used_hw_queues, queue_limit); 430 431 if (queue >= queue_limit) { 432 IWL_ERR(mvm, "Failed to allocate queue\n"); 433 ret = -EIO; 434 goto exit_fail; 435 } 436 437 __set_bit(queue, &used_hw_queues); 438 vif->hw_queue[ac] = queue; 439 } 440 441 /* Allocate the CAB queue for softAP and GO interfaces */ 442 if (vif->type == NL80211_IFTYPE_AP || 443 vif->type == NL80211_IFTYPE_ADHOC) { 444 /* 445 * For TVQM this will be overwritten later with the FW assigned 446 * queue value (when queue is enabled). 447 */ 448 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 449 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 450 } else { 451 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 452 } 453 454 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA; 455 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA; 456 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 457 458 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 459 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 460 461 return 0; 462 463 exit_fail: 464 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 465 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 466 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 467 return ret; 468 } 469 470 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 471 struct ieee80211_vif *vif, 472 enum nl80211_band band, 473 u8 *cck_rates, u8 *ofdm_rates) 474 { 475 struct ieee80211_supported_band *sband; 476 unsigned long basic = vif->bss_conf.basic_rates; 477 int lowest_present_ofdm = 100; 478 int lowest_present_cck = 100; 479 u8 cck = 0; 480 u8 ofdm = 0; 481 int i; 482 483 sband = mvm->hw->wiphy->bands[band]; 484 485 for_each_set_bit(i, &basic, BITS_PER_LONG) { 486 int hw = sband->bitrates[i].hw_value; 487 if (hw >= IWL_FIRST_OFDM_RATE) { 488 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 489 if (lowest_present_ofdm > hw) 490 lowest_present_ofdm = hw; 491 } else { 492 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 493 494 cck |= BIT(hw); 495 if (lowest_present_cck > hw) 496 lowest_present_cck = hw; 497 } 498 } 499 500 /* 501 * Now we've got the basic rates as bitmaps in the ofdm and cck 502 * variables. This isn't sufficient though, as there might not 503 * be all the right rates in the bitmap. E.g. if the only basic 504 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 505 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 506 * 507 * [...] a STA responding to a received frame shall transmit 508 * its Control Response frame [...] at the highest rate in the 509 * BSSBasicRateSet parameter that is less than or equal to the 510 * rate of the immediately previous frame in the frame exchange 511 * sequence ([...]) and that is of the same modulation class 512 * ([...]) as the received frame. If no rate contained in the 513 * BSSBasicRateSet parameter meets these conditions, then the 514 * control frame sent in response to a received frame shall be 515 * transmitted at the highest mandatory rate of the PHY that is 516 * less than or equal to the rate of the received frame, and 517 * that is of the same modulation class as the received frame. 518 * 519 * As a consequence, we need to add all mandatory rates that are 520 * lower than all of the basic rates to these bitmaps. 521 */ 522 523 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 524 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 525 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 526 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 527 /* 6M already there or needed so always add */ 528 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 529 530 /* 531 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 532 * Note, however: 533 * - if no CCK rates are basic, it must be ERP since there must 534 * be some basic rates at all, so they're OFDM => ERP PHY 535 * (or we're in 5 GHz, and the cck bitmap will never be used) 536 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 537 * - if 5.5M is basic, 1M and 2M are mandatory 538 * - if 2M is basic, 1M is mandatory 539 * - if 1M is basic, that's the only valid ACK rate. 540 * As a consequence, it's not as complicated as it sounds, just add 541 * any lower rates to the ACK rate bitmap. 542 */ 543 if (IWL_RATE_11M_INDEX < lowest_present_cck) 544 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 545 if (IWL_RATE_5M_INDEX < lowest_present_cck) 546 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 547 if (IWL_RATE_2M_INDEX < lowest_present_cck) 548 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 549 /* 1M already there or needed so always add */ 550 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 551 552 *cck_rates = cck; 553 *ofdm_rates = ofdm; 554 } 555 556 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 557 struct ieee80211_vif *vif, 558 struct iwl_mac_ctx_cmd *cmd) 559 { 560 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 561 u8 protection_mode = vif->bss_conf.ht_operation_mode & 562 IEEE80211_HT_OP_MODE_PROTECTION; 563 /* The fw does not distinguish between ht and fat */ 564 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 565 566 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 567 /* 568 * See section 9.23.3.1 of IEEE 80211-2012. 569 * Nongreenfield HT STAs Present is not supported. 570 */ 571 switch (protection_mode) { 572 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 573 break; 574 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 575 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 576 cmd->protection_flags |= cpu_to_le32(ht_flag); 577 break; 578 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 579 /* Protect when channel wider than 20MHz */ 580 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 581 cmd->protection_flags |= cpu_to_le32(ht_flag); 582 break; 583 default: 584 IWL_ERR(mvm, "Illegal protection mode %d\n", 585 protection_mode); 586 break; 587 } 588 } 589 590 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 591 struct ieee80211_vif *vif, 592 struct iwl_mac_ctx_cmd *cmd, 593 const u8 *bssid_override, 594 u32 action) 595 { 596 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 597 struct ieee80211_chanctx_conf *chanctx; 598 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 599 IEEE80211_HT_OP_MODE_PROTECTION); 600 u8 cck_ack_rates, ofdm_ack_rates; 601 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 602 int i; 603 604 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 605 mvmvif->color)); 606 cmd->action = cpu_to_le32(action); 607 608 switch (vif->type) { 609 case NL80211_IFTYPE_STATION: 610 if (vif->p2p) 611 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 612 else 613 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 614 break; 615 case NL80211_IFTYPE_AP: 616 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 617 break; 618 case NL80211_IFTYPE_MONITOR: 619 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 620 break; 621 case NL80211_IFTYPE_P2P_DEVICE: 622 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 623 break; 624 case NL80211_IFTYPE_ADHOC: 625 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 626 break; 627 default: 628 WARN_ON_ONCE(1); 629 } 630 631 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 632 633 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 634 635 if (bssid) 636 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 637 else 638 eth_broadcast_addr(cmd->bssid_addr); 639 640 rcu_read_lock(); 641 chanctx = rcu_dereference(vif->chanctx_conf); 642 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 643 : NL80211_BAND_2GHZ, 644 &cck_ack_rates, &ofdm_ack_rates); 645 rcu_read_unlock(); 646 647 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 648 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 649 650 cmd->cck_short_preamble = 651 cpu_to_le32(vif->bss_conf.use_short_preamble ? 652 MAC_FLG_SHORT_PREAMBLE : 0); 653 cmd->short_slot = 654 cpu_to_le32(vif->bss_conf.use_short_slot ? 655 MAC_FLG_SHORT_SLOT : 0); 656 657 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 658 659 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 660 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i); 661 662 cmd->ac[txf].cw_min = 663 cpu_to_le16(mvmvif->queue_params[i].cw_min); 664 cmd->ac[txf].cw_max = 665 cpu_to_le16(mvmvif->queue_params[i].cw_max); 666 cmd->ac[txf].edca_txop = 667 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 668 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 669 cmd->ac[txf].fifos_mask = BIT(txf); 670 } 671 672 if (vif->bss_conf.qos) 673 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 674 675 if (vif->bss_conf.use_cts_prot) 676 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 677 678 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 679 vif->bss_conf.use_cts_prot, 680 vif->bss_conf.ht_operation_mode); 681 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 682 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 683 if (ht_enabled) 684 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 685 } 686 687 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 688 struct iwl_mac_ctx_cmd *cmd) 689 { 690 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 691 sizeof(*cmd), cmd); 692 if (ret) 693 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 694 le32_to_cpu(cmd->action), ret); 695 return ret; 696 } 697 698 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 699 struct ieee80211_vif *vif, 700 u32 action, bool force_assoc_off, 701 const u8 *bssid_override) 702 { 703 struct iwl_mac_ctx_cmd cmd = {}; 704 struct iwl_mac_data_sta *ctxt_sta; 705 706 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 707 708 /* Fill the common data for all mac context types */ 709 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 710 711 if (vif->p2p) { 712 struct ieee80211_p2p_noa_attr *noa = 713 &vif->bss_conf.p2p_noa_attr; 714 715 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 716 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 717 ctxt_sta = &cmd.p2p_sta.sta; 718 } else { 719 ctxt_sta = &cmd.sta; 720 } 721 722 /* We need the dtim_period to set the MAC as associated */ 723 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 724 !force_assoc_off) { 725 u32 dtim_offs; 726 727 /* 728 * The DTIM count counts down, so when it is N that means N 729 * more beacon intervals happen until the DTIM TBTT. Therefore 730 * add this to the current time. If that ends up being in the 731 * future, the firmware will handle it. 732 * 733 * Also note that the system_timestamp (which we get here as 734 * "sync_device_ts") and TSF timestamp aren't at exactly the 735 * same offset in the frame -- the TSF is at the first symbol 736 * of the TSF, the system timestamp is at signal acquisition 737 * time. This means there's an offset between them of at most 738 * a few hundred microseconds (24 * 8 bits + PLCP time gives 739 * 384us in the longest case), this is currently not relevant 740 * as the firmware wakes up around 2ms before the TBTT. 741 */ 742 dtim_offs = vif->bss_conf.sync_dtim_count * 743 vif->bss_conf.beacon_int; 744 /* convert TU to usecs */ 745 dtim_offs *= 1024; 746 747 ctxt_sta->dtim_tsf = 748 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 749 ctxt_sta->dtim_time = 750 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 751 ctxt_sta->assoc_beacon_arrive_time = 752 cpu_to_le32(vif->bss_conf.sync_device_ts); 753 754 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 755 le64_to_cpu(ctxt_sta->dtim_tsf), 756 le32_to_cpu(ctxt_sta->dtim_time), 757 dtim_offs); 758 759 ctxt_sta->is_assoc = cpu_to_le32(1); 760 } else { 761 ctxt_sta->is_assoc = cpu_to_le32(0); 762 763 /* Allow beacons to pass through as long as we are not 764 * associated, or we do not have dtim period information. 765 */ 766 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 767 } 768 769 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 770 ctxt_sta->bi_reciprocal = 771 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 772 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 773 vif->bss_conf.dtim_period); 774 ctxt_sta->dtim_reciprocal = 775 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 776 vif->bss_conf.dtim_period)); 777 778 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 779 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 780 781 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 782 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 783 784 if (vif->bss_conf.assoc && vif->bss_conf.he_support && 785 !iwlwifi_mod_params.disable_11ax) 786 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_11AX); 787 788 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 789 } 790 791 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 792 struct ieee80211_vif *vif, 793 u32 action) 794 { 795 struct iwl_mac_ctx_cmd cmd = {}; 796 u32 tfd_queue_msk = BIT(mvm->snif_queue); 797 int ret; 798 799 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 800 801 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 802 803 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 804 MAC_FILTER_IN_CONTROL_AND_MGMT | 805 MAC_FILTER_IN_BEACON | 806 MAC_FILTER_IN_PROBE_REQUEST | 807 MAC_FILTER_IN_CRC32); 808 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 809 810 /* Allocate sniffer station */ 811 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 812 vif->type, IWL_STA_GENERAL_PURPOSE); 813 if (ret) 814 return ret; 815 816 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 817 } 818 819 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 820 struct ieee80211_vif *vif, 821 u32 action) 822 { 823 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 824 struct iwl_mac_ctx_cmd cmd = {}; 825 826 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 827 828 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 829 830 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 831 MAC_FILTER_IN_PROBE_REQUEST); 832 833 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 834 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 835 cmd.ibss.bi_reciprocal = 836 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 837 838 /* TODO: Assumes that the beacon id == mac context id */ 839 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 840 841 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 842 } 843 844 struct iwl_mvm_go_iterator_data { 845 bool go_active; 846 }; 847 848 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 849 { 850 struct iwl_mvm_go_iterator_data *data = _data; 851 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 852 853 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 854 mvmvif->ap_ibss_active) 855 data->go_active = true; 856 } 857 858 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 859 struct ieee80211_vif *vif, 860 u32 action) 861 { 862 struct iwl_mac_ctx_cmd cmd = {}; 863 struct iwl_mvm_go_iterator_data data = {}; 864 865 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 866 867 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 868 869 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 870 871 /* Override the filter flags to accept only probe requests */ 872 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 873 874 /* 875 * This flag should be set to true when the P2P Device is 876 * discoverable and there is at least another active P2P GO. Settings 877 * this flag will allow the P2P Device to be discoverable on other 878 * channels in addition to its listen channel. 879 * Note that this flag should not be set in other cases as it opens the 880 * Rx filters on all MAC and increases the number of interrupts. 881 */ 882 ieee80211_iterate_active_interfaces_atomic( 883 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 884 iwl_mvm_go_iterator, &data); 885 886 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 887 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 888 } 889 890 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 891 __le32 *tim_index, __le32 *tim_size, 892 u8 *beacon, u32 frame_size) 893 { 894 u32 tim_idx; 895 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 896 897 /* The index is relative to frame start but we start looking at the 898 * variable-length part of the beacon. */ 899 tim_idx = mgmt->u.beacon.variable - beacon; 900 901 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 902 while ((tim_idx < (frame_size - 2)) && 903 (beacon[tim_idx] != WLAN_EID_TIM)) 904 tim_idx += beacon[tim_idx+1] + 2; 905 906 /* If TIM field was found, set variables */ 907 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 908 *tim_index = cpu_to_le32(tim_idx); 909 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 910 } else { 911 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 912 } 913 } 914 915 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 916 { 917 struct ieee80211_mgmt *mgmt = (void *)beacon; 918 const u8 *ie; 919 920 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 921 return 0; 922 923 frame_size -= mgmt->u.beacon.variable - beacon; 924 925 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 926 if (!ie) 927 return 0; 928 929 return ie - beacon; 930 } 931 932 static u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info, 933 struct ieee80211_vif *vif) 934 { 935 u8 rate; 936 937 if (info->band == NL80211_BAND_5GHZ || vif->p2p) 938 rate = IWL_FIRST_OFDM_RATE; 939 else 940 rate = IWL_FIRST_CCK_RATE; 941 942 return rate; 943 } 944 945 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm, 946 struct ieee80211_vif *vif, 947 struct sk_buff *beacon, 948 struct iwl_tx_cmd *tx) 949 { 950 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 951 struct ieee80211_tx_info *info; 952 u8 rate; 953 u32 tx_flags; 954 955 info = IEEE80211_SKB_CB(beacon); 956 957 /* Set up TX command fields */ 958 tx->len = cpu_to_le16((u16)beacon->len); 959 tx->sta_id = mvmvif->bcast_sta.sta_id; 960 tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 961 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 962 tx_flags |= 963 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 964 TX_CMD_FLG_BT_PRIO_POS; 965 tx->tx_flags = cpu_to_le32(tx_flags); 966 967 if (!fw_has_capa(&mvm->fw->ucode_capa, 968 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 969 mvm->mgmt_last_antenna_idx = 970 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 971 mvm->mgmt_last_antenna_idx); 972 } 973 974 tx->rate_n_flags = 975 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 976 RATE_MCS_ANT_POS); 977 978 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif); 979 980 tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 981 if (rate == IWL_FIRST_CCK_RATE) 982 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); 983 984 } 985 986 static int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm, 987 struct sk_buff *beacon, 988 void *data, int len) 989 { 990 struct iwl_host_cmd cmd = { 991 .id = BEACON_TEMPLATE_CMD, 992 .flags = CMD_ASYNC, 993 }; 994 995 cmd.len[0] = len; 996 cmd.data[0] = data; 997 cmd.dataflags[0] = 0; 998 cmd.len[1] = beacon->len; 999 cmd.data[1] = beacon->data; 1000 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1001 1002 return iwl_mvm_send_cmd(mvm, &cmd); 1003 } 1004 1005 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm, 1006 struct ieee80211_vif *vif, 1007 struct sk_buff *beacon) 1008 { 1009 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1010 struct iwl_mac_beacon_cmd_v6 beacon_cmd = {}; 1011 1012 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); 1013 1014 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1015 1016 if (vif->type == NL80211_IFTYPE_AP) 1017 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 1018 &beacon_cmd.tim_size, 1019 beacon->data, beacon->len); 1020 1021 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 1022 sizeof(beacon_cmd)); 1023 } 1024 1025 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm, 1026 struct ieee80211_vif *vif, 1027 struct sk_buff *beacon) 1028 { 1029 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1030 struct iwl_mac_beacon_cmd_v7 beacon_cmd = {}; 1031 1032 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); 1033 1034 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1035 1036 if (vif->type == NL80211_IFTYPE_AP) 1037 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 1038 &beacon_cmd.tim_size, 1039 beacon->data, beacon->len); 1040 1041 beacon_cmd.csa_offset = 1042 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1043 WLAN_EID_CHANNEL_SWITCH, 1044 beacon->len)); 1045 beacon_cmd.ecsa_offset = 1046 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1047 WLAN_EID_EXT_CHANSWITCH_ANN, 1048 beacon->len)); 1049 1050 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 1051 sizeof(beacon_cmd)); 1052 } 1053 1054 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm, 1055 struct ieee80211_vif *vif, 1056 struct sk_buff *beacon) 1057 { 1058 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1059 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon); 1060 struct iwl_mac_beacon_cmd beacon_cmd = {}; 1061 u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif); 1062 u16 flags; 1063 1064 flags = iwl_mvm_mac80211_idx_to_hwrate(rate); 1065 1066 if (rate == IWL_FIRST_CCK_RATE) 1067 flags |= IWL_MAC_BEACON_CCK; 1068 1069 beacon_cmd.flags = cpu_to_le16(flags); 1070 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len); 1071 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 1072 1073 if (vif->type == NL80211_IFTYPE_AP) 1074 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 1075 &beacon_cmd.tim_size, 1076 beacon->data, beacon->len); 1077 1078 beacon_cmd.csa_offset = 1079 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1080 WLAN_EID_CHANNEL_SWITCH, 1081 beacon->len)); 1082 beacon_cmd.ecsa_offset = 1083 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 1084 WLAN_EID_EXT_CHANSWITCH_ANN, 1085 beacon->len)); 1086 1087 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 1088 sizeof(beacon_cmd)); 1089 } 1090 1091 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 1092 struct ieee80211_vif *vif, 1093 struct sk_buff *beacon) 1094 { 1095 if (WARN_ON(!beacon)) 1096 return -EINVAL; 1097 1098 if (!fw_has_capa(&mvm->fw->ucode_capa, 1099 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) 1100 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon); 1101 1102 if (fw_has_api(&mvm->fw->ucode_capa, 1103 IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE)) 1104 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon); 1105 1106 return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon); 1107 } 1108 1109 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1110 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1111 struct ieee80211_vif *vif) 1112 { 1113 struct sk_buff *beacon; 1114 int ret; 1115 1116 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1117 vif->type != NL80211_IFTYPE_ADHOC); 1118 1119 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1120 if (!beacon) 1121 return -ENOMEM; 1122 1123 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1124 dev_kfree_skb(beacon); 1125 return ret; 1126 } 1127 1128 struct iwl_mvm_mac_ap_iterator_data { 1129 struct iwl_mvm *mvm; 1130 struct ieee80211_vif *vif; 1131 u32 beacon_device_ts; 1132 u16 beacon_int; 1133 }; 1134 1135 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1136 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1137 struct ieee80211_vif *vif) 1138 { 1139 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1140 1141 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1142 return; 1143 1144 /* Station client has higher priority over P2P client*/ 1145 if (vif->p2p && data->beacon_device_ts) 1146 return; 1147 1148 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1149 data->beacon_int = vif->bss_conf.beacon_int; 1150 } 1151 1152 /* 1153 * Fill the specific data for mac context of type AP of P2P GO 1154 */ 1155 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1156 struct ieee80211_vif *vif, 1157 struct iwl_mac_ctx_cmd *cmd, 1158 struct iwl_mac_data_ap *ctxt_ap, 1159 bool add) 1160 { 1161 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1162 struct iwl_mvm_mac_ap_iterator_data data = { 1163 .mvm = mvm, 1164 .vif = vif, 1165 .beacon_device_ts = 0 1166 }; 1167 1168 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1169 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1170 1171 /* 1172 * in AP mode, pass probe requests and beacons from other APs 1173 * (needed for ht protection); when there're no any associated 1174 * station don't ask FW to pass beacons to prevent unnecessary 1175 * wake-ups. 1176 */ 1177 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1178 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1179 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1180 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1181 } else { 1182 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1183 } 1184 1185 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1186 ctxt_ap->bi_reciprocal = 1187 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1188 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1189 vif->bss_conf.dtim_period); 1190 ctxt_ap->dtim_reciprocal = 1191 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1192 vif->bss_conf.dtim_period)); 1193 1194 if (!fw_has_api(&mvm->fw->ucode_capa, 1195 IWL_UCODE_TLV_API_STA_TYPE)) 1196 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1197 1198 /* 1199 * Only set the beacon time when the MAC is being added, when we 1200 * just modify the MAC then we should keep the time -- the firmware 1201 * can otherwise have a "jumping" TBTT. 1202 */ 1203 if (add) { 1204 /* 1205 * If there is a station/P2P client interface which is 1206 * associated, set the AP's TBTT far enough from the station's 1207 * TBTT. Otherwise, set it to the current system time 1208 */ 1209 ieee80211_iterate_active_interfaces_atomic( 1210 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1211 iwl_mvm_mac_ap_iterator, &data); 1212 1213 if (data.beacon_device_ts) { 1214 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1215 mvmvif->ap_beacon_time = data.beacon_device_ts + 1216 ieee80211_tu_to_usec(data.beacon_int * rand / 1217 100); 1218 } else { 1219 mvmvif->ap_beacon_time = 1220 iwl_read_prph(mvm->trans, 1221 DEVICE_SYSTEM_TIME_REG); 1222 } 1223 } 1224 1225 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1226 ctxt_ap->beacon_tsf = 0; /* unused */ 1227 1228 /* TODO: Assume that the beacon id == mac context id */ 1229 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1230 } 1231 1232 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1233 struct ieee80211_vif *vif, 1234 u32 action) 1235 { 1236 struct iwl_mac_ctx_cmd cmd = {}; 1237 1238 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1239 1240 /* Fill the common data for all mac context types */ 1241 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1242 1243 /* Fill the data specific for ap mode */ 1244 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1245 action == FW_CTXT_ACTION_ADD); 1246 1247 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1248 } 1249 1250 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1251 struct ieee80211_vif *vif, 1252 u32 action) 1253 { 1254 struct iwl_mac_ctx_cmd cmd = {}; 1255 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1256 1257 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1258 1259 /* Fill the common data for all mac context types */ 1260 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1261 1262 /* Fill the data specific for GO mode */ 1263 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1264 action == FW_CTXT_ACTION_ADD); 1265 1266 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1267 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1268 cmd.go.opp_ps_enabled = 1269 cpu_to_le32(!!(noa->oppps_ctwindow & 1270 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1271 1272 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1273 } 1274 1275 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1276 u32 action, bool force_assoc_off, 1277 const u8 *bssid_override) 1278 { 1279 switch (vif->type) { 1280 case NL80211_IFTYPE_STATION: 1281 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1282 force_assoc_off, 1283 bssid_override); 1284 break; 1285 case NL80211_IFTYPE_AP: 1286 if (!vif->p2p) 1287 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1288 else 1289 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1290 break; 1291 case NL80211_IFTYPE_MONITOR: 1292 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1293 case NL80211_IFTYPE_P2P_DEVICE: 1294 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1295 case NL80211_IFTYPE_ADHOC: 1296 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1297 default: 1298 break; 1299 } 1300 1301 return -EOPNOTSUPP; 1302 } 1303 1304 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1305 { 1306 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1307 int ret; 1308 1309 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1310 vif->addr, ieee80211_vif_type_p2p(vif))) 1311 return -EIO; 1312 1313 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1314 true, NULL); 1315 if (ret) 1316 return ret; 1317 1318 /* will only do anything at resume from D3 time */ 1319 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1320 1321 mvmvif->uploaded = true; 1322 return 0; 1323 } 1324 1325 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1326 bool force_assoc_off, const u8 *bssid_override) 1327 { 1328 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1329 1330 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1331 vif->addr, ieee80211_vif_type_p2p(vif))) 1332 return -EIO; 1333 1334 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1335 force_assoc_off, bssid_override); 1336 } 1337 1338 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1339 { 1340 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1341 struct iwl_mac_ctx_cmd cmd; 1342 int ret; 1343 1344 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1345 vif->addr, ieee80211_vif_type_p2p(vif))) 1346 return -EIO; 1347 1348 memset(&cmd, 0, sizeof(cmd)); 1349 1350 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1351 mvmvif->color)); 1352 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1353 1354 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1355 sizeof(cmd), &cmd); 1356 if (ret) { 1357 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1358 return ret; 1359 } 1360 1361 mvmvif->uploaded = false; 1362 1363 if (vif->type == NL80211_IFTYPE_MONITOR) { 1364 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1365 iwl_mvm_dealloc_snif_sta(mvm); 1366 } 1367 1368 return 0; 1369 } 1370 1371 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1372 struct ieee80211_vif *csa_vif, u32 gp2, 1373 bool tx_success) 1374 { 1375 struct iwl_mvm_vif *mvmvif = 1376 iwl_mvm_vif_from_mac80211(csa_vif); 1377 1378 /* Don't start to countdown from a failed beacon */ 1379 if (!tx_success && !mvmvif->csa_countdown) 1380 return; 1381 1382 mvmvif->csa_countdown = true; 1383 1384 if (!ieee80211_csa_is_complete(csa_vif)) { 1385 int c = ieee80211_csa_update_counter(csa_vif); 1386 1387 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1388 if (csa_vif->p2p && 1389 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1390 tx_success) { 1391 u32 rel_time = (c + 1) * 1392 csa_vif->bss_conf.beacon_int - 1393 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1394 u32 apply_time = gp2 + rel_time * 1024; 1395 1396 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1397 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1398 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1399 apply_time); 1400 } 1401 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1402 /* we don't have CSA NoA scheduled yet, switch now */ 1403 ieee80211_csa_finish(csa_vif); 1404 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1405 } 1406 } 1407 1408 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1409 struct iwl_rx_cmd_buffer *rxb) 1410 { 1411 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1412 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1413 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1414 struct ieee80211_vif *csa_vif; 1415 struct ieee80211_vif *tx_blocked_vif; 1416 struct agg_tx_status *agg_status; 1417 u16 status; 1418 1419 lockdep_assert_held(&mvm->mutex); 1420 1421 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1422 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1423 mvm->ibss_manager = beacon->ibss_mgr_status != 0; 1424 1425 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr); 1426 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK; 1427 IWL_DEBUG_RX(mvm, 1428 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1429 status, beacon_notify_hdr->failure_frame, 1430 le64_to_cpu(beacon->tsf), 1431 mvm->ap_last_beacon_gp2, 1432 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1433 1434 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1435 lockdep_is_held(&mvm->mutex)); 1436 if (unlikely(csa_vif && csa_vif->csa_active)) 1437 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1438 (status == TX_STATUS_SUCCESS)); 1439 1440 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1441 lockdep_is_held(&mvm->mutex)); 1442 if (unlikely(tx_blocked_vif)) { 1443 struct iwl_mvm_vif *mvmvif = 1444 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1445 1446 /* 1447 * The channel switch is started and we have blocked the 1448 * stations. If this is the first beacon (the timeout wasn't 1449 * set), set the unblock timeout, otherwise countdown 1450 */ 1451 if (!mvm->csa_tx_block_bcn_timeout) 1452 mvm->csa_tx_block_bcn_timeout = 1453 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1454 else 1455 mvm->csa_tx_block_bcn_timeout--; 1456 1457 /* Check if the timeout is expired, and unblock tx */ 1458 if (mvm->csa_tx_block_bcn_timeout == 0) { 1459 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1460 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1461 } 1462 } 1463 } 1464 1465 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1466 struct ieee80211_vif *vif) 1467 { 1468 struct iwl_missed_beacons_notif *missed_beacons = _data; 1469 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1470 struct iwl_mvm *mvm = mvmvif->mvm; 1471 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1472 struct iwl_fw_dbg_trigger_tlv *trigger; 1473 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1474 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1475 1476 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1477 return; 1478 1479 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1480 rx_missed_bcon_since_rx = 1481 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1482 /* 1483 * TODO: the threshold should be adjusted based on latency conditions, 1484 * and/or in case of a CS flow on one of the other AP vifs. 1485 */ 1486 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1487 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1488 ieee80211_beacon_loss(vif); 1489 1490 trigger = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif), 1491 FW_DBG_TRIGGER_MISSED_BEACONS); 1492 if (!trigger) 1493 return; 1494 1495 bcon_trig = (void *)trigger->data; 1496 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1497 stop_trig_missed_bcon_since_rx = 1498 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1499 1500 /* TODO: implement start trigger */ 1501 1502 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1503 rx_missed_bcon >= stop_trig_missed_bcon) 1504 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL); 1505 } 1506 1507 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1508 struct iwl_rx_cmd_buffer *rxb) 1509 { 1510 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1511 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1512 1513 IWL_DEBUG_INFO(mvm, 1514 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1515 le32_to_cpu(mb->mac_id), 1516 le32_to_cpu(mb->consec_missed_beacons), 1517 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1518 le32_to_cpu(mb->num_recvd_beacons), 1519 le32_to_cpu(mb->num_expected_beacons)); 1520 1521 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1522 IEEE80211_IFACE_ITER_NORMAL, 1523 iwl_mvm_beacon_loss_iterator, 1524 mb); 1525 } 1526 1527 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1528 struct iwl_rx_cmd_buffer *rxb) 1529 { 1530 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1531 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1532 struct ieee80211_rx_status rx_status; 1533 struct sk_buff *skb; 1534 u32 size = le32_to_cpu(sb->byte_count); 1535 1536 if (size == 0) 1537 return; 1538 1539 skb = alloc_skb(size, GFP_ATOMIC); 1540 if (!skb) { 1541 IWL_ERR(mvm, "alloc_skb failed\n"); 1542 return; 1543 } 1544 1545 /* update rx_status according to the notification's metadata */ 1546 memset(&rx_status, 0, sizeof(rx_status)); 1547 rx_status.mactime = le64_to_cpu(sb->tsf); 1548 /* TSF as indicated by the firmware is at INA time */ 1549 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1550 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1551 rx_status.band = 1552 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1553 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1554 rx_status.freq = 1555 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1556 rx_status.band); 1557 1558 /* copy the data */ 1559 skb_put_data(skb, sb->data, size); 1560 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1561 1562 /* pass it as regular rx to mac80211 */ 1563 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1564 } 1565 1566 static void iwl_mvm_probe_resp_data_iter(void *_data, u8 *mac, 1567 struct ieee80211_vif *vif) 1568 { 1569 struct iwl_probe_resp_data_notif *notif = _data; 1570 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1571 struct iwl_probe_resp_data *old_data, *new_data; 1572 1573 if (mvmvif->id != (u16)le32_to_cpu(notif->mac_id)) 1574 return; 1575 1576 new_data = kzalloc(sizeof(*new_data), GFP_KERNEL); 1577 if (!new_data) 1578 return; 1579 1580 memcpy(&new_data->notif, notif, sizeof(new_data->notif)); 1581 1582 /* noa_attr contains 1 reserved byte, need to substruct it */ 1583 new_data->noa_len = sizeof(struct ieee80211_vendor_ie) + 1584 sizeof(new_data->notif.noa_attr) - 1; 1585 1586 /* 1587 * If it's a one time NoA, only one descriptor is needed, 1588 * adjust the length according to len_low. 1589 */ 1590 if (new_data->notif.noa_attr.len_low == 1591 sizeof(struct ieee80211_p2p_noa_desc) + 2) 1592 new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc); 1593 1594 old_data = rcu_dereference_protected(mvmvif->probe_resp_data, 1595 lockdep_is_held(&mvmvif->mvm->mutex)); 1596 rcu_assign_pointer(mvmvif->probe_resp_data, new_data); 1597 1598 if (old_data) 1599 kfree_rcu(old_data, rcu_head); 1600 1601 if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA && 1602 notif->csa_counter >= 1) 1603 ieee80211_csa_set_counter(vif, notif->csa_counter); 1604 } 1605 1606 void iwl_mvm_probe_resp_data_notif(struct iwl_mvm *mvm, 1607 struct iwl_rx_cmd_buffer *rxb) 1608 { 1609 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1610 struct iwl_probe_resp_data_notif *notif = (void *)pkt->data; 1611 int len = iwl_rx_packet_payload_len(pkt); 1612 1613 if (WARN_ON_ONCE(len < sizeof(*notif))) 1614 return; 1615 1616 IWL_DEBUG_INFO(mvm, "Probe response data notif: noa %d, csa %d\n", 1617 notif->noa_active, notif->csa_counter); 1618 1619 ieee80211_iterate_active_interfaces(mvm->hw, 1620 IEEE80211_IFACE_ITER_ACTIVE, 1621 iwl_mvm_probe_resp_data_iter, 1622 notif); 1623 } 1624 1625 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1626 struct iwl_rx_cmd_buffer *rxb) 1627 { 1628 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1629 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1630 struct ieee80211_vif *csa_vif; 1631 struct iwl_mvm_vif *mvmvif; 1632 int len = iwl_rx_packet_payload_len(pkt); 1633 u32 id_n_color; 1634 1635 if (WARN_ON_ONCE(len < sizeof(*notif))) 1636 return; 1637 1638 rcu_read_lock(); 1639 1640 csa_vif = rcu_dereference(mvm->csa_vif); 1641 if (WARN_ON(!csa_vif || !csa_vif->csa_active)) 1642 goto out_unlock; 1643 1644 id_n_color = le32_to_cpu(notif->id_and_color); 1645 1646 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); 1647 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, 1648 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1649 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) 1650 goto out_unlock; 1651 1652 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1653 1654 schedule_delayed_work(&mvm->cs_tx_unblock_dwork, 1655 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1656 csa_vif->bss_conf.beacon_int)); 1657 1658 ieee80211_csa_finish(csa_vif); 1659 1660 rcu_read_unlock(); 1661 1662 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1663 1664 return; 1665 1666 out_unlock: 1667 rcu_read_unlock(); 1668 } 1669