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 - 2019 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 - 2019 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 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 101 struct ieee80211_vif *vif) 102 { 103 struct iwl_mvm_mac_iface_iterator_data *data = _data; 104 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 105 u16 min_bi; 106 107 /* Skip the interface for which we are trying to assign a tsf_id */ 108 if (vif == data->vif) 109 return; 110 111 /* 112 * The TSF is a hardware/firmware resource, there are 4 and 113 * the driver should assign and free them as needed. However, 114 * there are cases where 2 MACs should share the same TSF ID 115 * for the purpose of clock sync, an optimization to avoid 116 * clock drift causing overlapping TBTTs/DTIMs for a GO and 117 * client in the system. 118 * 119 * The firmware will decide according to the MAC type which 120 * will be the master and slave. Clients that need to sync 121 * with a remote station will be the master, and an AP or GO 122 * will be the slave. 123 * 124 * Depending on the new interface type it can be slaved to 125 * or become the master of an existing interface. 126 */ 127 switch (data->vif->type) { 128 case NL80211_IFTYPE_STATION: 129 /* 130 * The new interface is a client, so if the one we're iterating 131 * is an AP, and the beacon interval of the AP is a multiple or 132 * divisor of the beacon interval of the client, the same TSF 133 * should be used to avoid drift between the new client and 134 * existing AP. The existing AP will get drift updates from the 135 * new client context in this case. 136 */ 137 if (vif->type != NL80211_IFTYPE_AP || 138 data->preferred_tsf != NUM_TSF_IDS || 139 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 140 break; 141 142 min_bi = min(data->vif->bss_conf.beacon_int, 143 vif->bss_conf.beacon_int); 144 145 if (!min_bi) 146 break; 147 148 if ((data->vif->bss_conf.beacon_int - 149 vif->bss_conf.beacon_int) % min_bi == 0) { 150 data->preferred_tsf = mvmvif->tsf_id; 151 return; 152 } 153 break; 154 155 case NL80211_IFTYPE_AP: 156 /* 157 * The new interface is AP/GO, so if its beacon interval is a 158 * multiple or a divisor of the beacon interval of an existing 159 * interface, it should get drift updates from an existing 160 * client or use the same TSF as an existing GO. There's no 161 * drift between TSFs internally but if they used different 162 * TSFs then a new client MAC could update one of them and 163 * cause drift that way. 164 */ 165 if ((vif->type != NL80211_IFTYPE_AP && 166 vif->type != NL80211_IFTYPE_STATION) || 167 data->preferred_tsf != NUM_TSF_IDS || 168 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 169 break; 170 171 min_bi = min(data->vif->bss_conf.beacon_int, 172 vif->bss_conf.beacon_int); 173 174 if (!min_bi) 175 break; 176 177 if ((data->vif->bss_conf.beacon_int - 178 vif->bss_conf.beacon_int) % min_bi == 0) { 179 data->preferred_tsf = mvmvif->tsf_id; 180 return; 181 } 182 break; 183 default: 184 /* 185 * For all other interface types there's no need to 186 * take drift into account. Either they're exclusive 187 * like IBSS and monitor, or we don't care much about 188 * their TSF (like P2P Device), but we won't be able 189 * to share the TSF resource. 190 */ 191 break; 192 } 193 194 /* 195 * Unless we exited above, we can't share the TSF resource 196 * that the virtual interface we're iterating over is using 197 * with the new one, so clear the available bit and if this 198 * was the preferred one, reset that as well. 199 */ 200 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 201 202 if (data->preferred_tsf == mvmvif->tsf_id) 203 data->preferred_tsf = NUM_TSF_IDS; 204 } 205 206 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 207 struct ieee80211_vif *vif) 208 { 209 struct iwl_mvm_mac_iface_iterator_data *data = _data; 210 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 211 212 /* Iterator may already find the interface being added -- skip it */ 213 if (vif == data->vif) { 214 data->found_vif = true; 215 return; 216 } 217 218 /* Mark MAC IDs as used by clearing the available bit, and 219 * (below) mark TSFs as used if their existing use is not 220 * compatible with the new interface type. 221 * No locking or atomic bit operations are needed since the 222 * data is on the stack of the caller function. 223 */ 224 __clear_bit(mvmvif->id, data->available_mac_ids); 225 226 /* find a suitable tsf_id */ 227 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 228 } 229 230 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 231 struct ieee80211_vif *vif) 232 { 233 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 234 struct iwl_mvm_mac_iface_iterator_data data = { 235 .mvm = mvm, 236 .vif = vif, 237 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 238 /* no preference yet */ 239 .preferred_tsf = NUM_TSF_IDS, 240 }; 241 242 ieee80211_iterate_active_interfaces_atomic( 243 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 244 iwl_mvm_mac_tsf_id_iter, &data); 245 246 if (data.preferred_tsf != NUM_TSF_IDS) 247 mvmvif->tsf_id = data.preferred_tsf; 248 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 249 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 250 NUM_TSF_IDS); 251 } 252 253 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 254 { 255 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 256 struct iwl_mvm_mac_iface_iterator_data data = { 257 .mvm = mvm, 258 .vif = vif, 259 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 260 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 261 /* no preference yet */ 262 .preferred_tsf = NUM_TSF_IDS, 263 .found_vif = false, 264 }; 265 int ret, i; 266 267 lockdep_assert_held(&mvm->mutex); 268 269 /* 270 * Allocate a MAC ID and a TSF for this MAC, along with the queues 271 * and other resources. 272 */ 273 274 /* 275 * Before the iterator, we start with all MAC IDs and TSFs available. 276 * 277 * During iteration, all MAC IDs are cleared that are in use by other 278 * virtual interfaces, and all TSF IDs are cleared that can't be used 279 * by this new virtual interface because they're used by an interface 280 * that can't share it with the new one. 281 * At the same time, we check if there's a preferred TSF in the case 282 * that we should share it with another interface. 283 */ 284 285 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 286 switch (vif->type) { 287 case NL80211_IFTYPE_ADHOC: 288 break; 289 case NL80211_IFTYPE_STATION: 290 if (!vif->p2p) 291 break; 292 /* fall through */ 293 default: 294 __clear_bit(0, data.available_mac_ids); 295 } 296 297 ieee80211_iterate_active_interfaces_atomic( 298 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 299 iwl_mvm_mac_iface_iterator, &data); 300 301 /* 302 * In the case we're getting here during resume, it's similar to 303 * firmware restart, and with RESUME_ALL the iterator will find 304 * the vif being added already. 305 * We don't want to reassign any IDs in either case since doing 306 * so would probably assign different IDs (as interfaces aren't 307 * necessarily added in the same order), but the old IDs were 308 * preserved anyway, so skip ID assignment for both resume and 309 * recovery. 310 */ 311 if (data.found_vif) 312 return 0; 313 314 /* Therefore, in recovery, we can't get here */ 315 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 316 return -EBUSY; 317 318 mvmvif->id = find_first_bit(data.available_mac_ids, 319 NUM_MAC_INDEX_DRIVER); 320 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 321 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 322 ret = -EIO; 323 goto exit_fail; 324 } 325 326 if (data.preferred_tsf != NUM_TSF_IDS) 327 mvmvif->tsf_id = data.preferred_tsf; 328 else 329 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 330 NUM_TSF_IDS); 331 if (mvmvif->tsf_id == NUM_TSF_IDS) { 332 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 333 ret = -EIO; 334 goto exit_fail; 335 } 336 337 mvmvif->color = 0; 338 339 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 340 mvmvif->time_event_data.id = TE_MAX; 341 342 /* No need to allocate data queues to P2P Device MAC and NAN.*/ 343 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 344 return 0; 345 346 /* Allocate the CAB queue for softAP and GO interfaces */ 347 if (vif->type == NL80211_IFTYPE_AP || 348 vif->type == NL80211_IFTYPE_ADHOC) { 349 /* 350 * For TVQM this will be overwritten later with the FW assigned 351 * queue value (when queue is enabled). 352 */ 353 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 354 } 355 356 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA; 357 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA; 358 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 359 360 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 361 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 362 363 return 0; 364 365 exit_fail: 366 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 367 return ret; 368 } 369 370 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 371 struct ieee80211_vif *vif, 372 enum nl80211_band band, 373 u8 *cck_rates, u8 *ofdm_rates) 374 { 375 struct ieee80211_supported_band *sband; 376 unsigned long basic = vif->bss_conf.basic_rates; 377 int lowest_present_ofdm = 100; 378 int lowest_present_cck = 100; 379 u8 cck = 0; 380 u8 ofdm = 0; 381 int i; 382 383 sband = mvm->hw->wiphy->bands[band]; 384 385 for_each_set_bit(i, &basic, BITS_PER_LONG) { 386 int hw = sband->bitrates[i].hw_value; 387 if (hw >= IWL_FIRST_OFDM_RATE) { 388 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 389 if (lowest_present_ofdm > hw) 390 lowest_present_ofdm = hw; 391 } else { 392 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 393 394 cck |= BIT(hw); 395 if (lowest_present_cck > hw) 396 lowest_present_cck = hw; 397 } 398 } 399 400 /* 401 * Now we've got the basic rates as bitmaps in the ofdm and cck 402 * variables. This isn't sufficient though, as there might not 403 * be all the right rates in the bitmap. E.g. if the only basic 404 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 405 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 406 * 407 * [...] a STA responding to a received frame shall transmit 408 * its Control Response frame [...] at the highest rate in the 409 * BSSBasicRateSet parameter that is less than or equal to the 410 * rate of the immediately previous frame in the frame exchange 411 * sequence ([...]) and that is of the same modulation class 412 * ([...]) as the received frame. If no rate contained in the 413 * BSSBasicRateSet parameter meets these conditions, then the 414 * control frame sent in response to a received frame shall be 415 * transmitted at the highest mandatory rate of the PHY that is 416 * less than or equal to the rate of the received frame, and 417 * that is of the same modulation class as the received frame. 418 * 419 * As a consequence, we need to add all mandatory rates that are 420 * lower than all of the basic rates to these bitmaps. 421 */ 422 423 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 424 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 425 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 426 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 427 /* 6M already there or needed so always add */ 428 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 429 430 /* 431 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 432 * Note, however: 433 * - if no CCK rates are basic, it must be ERP since there must 434 * be some basic rates at all, so they're OFDM => ERP PHY 435 * (or we're in 5 GHz, and the cck bitmap will never be used) 436 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 437 * - if 5.5M is basic, 1M and 2M are mandatory 438 * - if 2M is basic, 1M is mandatory 439 * - if 1M is basic, that's the only valid ACK rate. 440 * As a consequence, it's not as complicated as it sounds, just add 441 * any lower rates to the ACK rate bitmap. 442 */ 443 if (IWL_RATE_11M_INDEX < lowest_present_cck) 444 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 445 if (IWL_RATE_5M_INDEX < lowest_present_cck) 446 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 447 if (IWL_RATE_2M_INDEX < lowest_present_cck) 448 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 449 /* 1M already there or needed so always add */ 450 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 451 452 *cck_rates = cck; 453 *ofdm_rates = ofdm; 454 } 455 456 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 457 struct ieee80211_vif *vif, 458 struct iwl_mac_ctx_cmd *cmd) 459 { 460 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 461 u8 protection_mode = vif->bss_conf.ht_operation_mode & 462 IEEE80211_HT_OP_MODE_PROTECTION; 463 /* The fw does not distinguish between ht and fat */ 464 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 465 466 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 467 /* 468 * See section 9.23.3.1 of IEEE 80211-2012. 469 * Nongreenfield HT STAs Present is not supported. 470 */ 471 switch (protection_mode) { 472 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 473 break; 474 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 475 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 476 cmd->protection_flags |= cpu_to_le32(ht_flag); 477 break; 478 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 479 /* Protect when channel wider than 20MHz */ 480 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 481 cmd->protection_flags |= cpu_to_le32(ht_flag); 482 break; 483 default: 484 IWL_ERR(mvm, "Illegal protection mode %d\n", 485 protection_mode); 486 break; 487 } 488 } 489 490 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 491 struct ieee80211_vif *vif, 492 struct iwl_mac_ctx_cmd *cmd, 493 const u8 *bssid_override, 494 u32 action) 495 { 496 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 497 struct ieee80211_chanctx_conf *chanctx; 498 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 499 IEEE80211_HT_OP_MODE_PROTECTION); 500 u8 cck_ack_rates, ofdm_ack_rates; 501 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 502 int i; 503 504 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 505 mvmvif->color)); 506 cmd->action = cpu_to_le32(action); 507 508 switch (vif->type) { 509 case NL80211_IFTYPE_STATION: 510 if (vif->p2p) 511 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 512 else 513 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 514 break; 515 case NL80211_IFTYPE_AP: 516 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 517 break; 518 case NL80211_IFTYPE_MONITOR: 519 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 520 break; 521 case NL80211_IFTYPE_P2P_DEVICE: 522 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 523 break; 524 case NL80211_IFTYPE_ADHOC: 525 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 526 break; 527 default: 528 WARN_ON_ONCE(1); 529 } 530 531 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 532 533 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 534 535 if (bssid) 536 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 537 else 538 eth_broadcast_addr(cmd->bssid_addr); 539 540 rcu_read_lock(); 541 chanctx = rcu_dereference(vif->chanctx_conf); 542 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 543 : NL80211_BAND_2GHZ, 544 &cck_ack_rates, &ofdm_ack_rates); 545 rcu_read_unlock(); 546 547 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 548 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 549 550 cmd->cck_short_preamble = 551 cpu_to_le32(vif->bss_conf.use_short_preamble ? 552 MAC_FLG_SHORT_PREAMBLE : 0); 553 cmd->short_slot = 554 cpu_to_le32(vif->bss_conf.use_short_slot ? 555 MAC_FLG_SHORT_SLOT : 0); 556 557 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 558 559 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 560 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i); 561 562 cmd->ac[txf].cw_min = 563 cpu_to_le16(mvmvif->queue_params[i].cw_min); 564 cmd->ac[txf].cw_max = 565 cpu_to_le16(mvmvif->queue_params[i].cw_max); 566 cmd->ac[txf].edca_txop = 567 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 568 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 569 cmd->ac[txf].fifos_mask = BIT(txf); 570 } 571 572 if (vif->bss_conf.qos) 573 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 574 575 if (vif->bss_conf.use_cts_prot) 576 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 577 578 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 579 vif->bss_conf.use_cts_prot, 580 vif->bss_conf.ht_operation_mode); 581 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 582 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 583 if (ht_enabled) 584 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 585 } 586 587 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 588 struct iwl_mac_ctx_cmd *cmd) 589 { 590 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 591 sizeof(*cmd), cmd); 592 if (ret) 593 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 594 le32_to_cpu(cmd->action), ret); 595 return ret; 596 } 597 598 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 599 struct ieee80211_vif *vif, 600 u32 action, bool force_assoc_off, 601 const u8 *bssid_override) 602 { 603 struct iwl_mac_ctx_cmd cmd = {}; 604 struct iwl_mac_data_sta *ctxt_sta; 605 606 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 607 608 /* Fill the common data for all mac context types */ 609 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 610 611 if (vif->p2p) { 612 struct ieee80211_p2p_noa_attr *noa = 613 &vif->bss_conf.p2p_noa_attr; 614 615 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 616 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 617 ctxt_sta = &cmd.p2p_sta.sta; 618 } else { 619 ctxt_sta = &cmd.sta; 620 } 621 622 /* We need the dtim_period to set the MAC as associated */ 623 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 624 !force_assoc_off) { 625 u32 dtim_offs; 626 627 /* 628 * The DTIM count counts down, so when it is N that means N 629 * more beacon intervals happen until the DTIM TBTT. Therefore 630 * add this to the current time. If that ends up being in the 631 * future, the firmware will handle it. 632 * 633 * Also note that the system_timestamp (which we get here as 634 * "sync_device_ts") and TSF timestamp aren't at exactly the 635 * same offset in the frame -- the TSF is at the first symbol 636 * of the TSF, the system timestamp is at signal acquisition 637 * time. This means there's an offset between them of at most 638 * a few hundred microseconds (24 * 8 bits + PLCP time gives 639 * 384us in the longest case), this is currently not relevant 640 * as the firmware wakes up around 2ms before the TBTT. 641 */ 642 dtim_offs = vif->bss_conf.sync_dtim_count * 643 vif->bss_conf.beacon_int; 644 /* convert TU to usecs */ 645 dtim_offs *= 1024; 646 647 ctxt_sta->dtim_tsf = 648 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 649 ctxt_sta->dtim_time = 650 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 651 ctxt_sta->assoc_beacon_arrive_time = 652 cpu_to_le32(vif->bss_conf.sync_device_ts); 653 654 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 655 le64_to_cpu(ctxt_sta->dtim_tsf), 656 le32_to_cpu(ctxt_sta->dtim_time), 657 dtim_offs); 658 659 ctxt_sta->is_assoc = cpu_to_le32(1); 660 } else { 661 ctxt_sta->is_assoc = cpu_to_le32(0); 662 663 /* Allow beacons to pass through as long as we are not 664 * associated, or we do not have dtim period information. 665 */ 666 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 667 } 668 669 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 670 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 671 vif->bss_conf.dtim_period); 672 673 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 674 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 675 676 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 677 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 678 679 if (vif->bss_conf.he_support && !iwlwifi_mod_params.disable_11ax) { 680 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_11AX); 681 if (vif->bss_conf.twt_requester) 682 ctxt_sta->data_policy |= cpu_to_le32(TWT_SUPPORTED); 683 } 684 685 686 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 687 } 688 689 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 690 struct ieee80211_vif *vif, 691 u32 action) 692 { 693 struct iwl_mac_ctx_cmd cmd = {}; 694 u32 tfd_queue_msk = BIT(mvm->snif_queue); 695 int ret; 696 697 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 698 699 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 700 701 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 702 MAC_FILTER_IN_CONTROL_AND_MGMT | 703 MAC_FILTER_IN_BEACON | 704 MAC_FILTER_IN_PROBE_REQUEST | 705 MAC_FILTER_IN_CRC32); 706 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 707 708 /* Allocate sniffer station */ 709 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 710 vif->type, IWL_STA_GENERAL_PURPOSE); 711 if (ret) 712 return ret; 713 714 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 715 } 716 717 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 718 struct ieee80211_vif *vif, 719 u32 action) 720 { 721 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 722 struct iwl_mac_ctx_cmd cmd = {}; 723 724 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 725 726 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 727 728 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 729 MAC_FILTER_IN_PROBE_REQUEST); 730 731 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 732 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 733 734 /* TODO: Assumes that the beacon id == mac context id */ 735 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 736 737 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 738 } 739 740 struct iwl_mvm_go_iterator_data { 741 bool go_active; 742 }; 743 744 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 745 { 746 struct iwl_mvm_go_iterator_data *data = _data; 747 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 748 749 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 750 mvmvif->ap_ibss_active) 751 data->go_active = true; 752 } 753 754 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 755 struct ieee80211_vif *vif, 756 u32 action) 757 { 758 struct iwl_mac_ctx_cmd cmd = {}; 759 struct iwl_mvm_go_iterator_data data = {}; 760 761 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 762 763 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 764 765 /* Override the filter flags to accept only probe requests */ 766 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 767 768 /* 769 * This flag should be set to true when the P2P Device is 770 * discoverable and there is at least another active P2P GO. Settings 771 * this flag will allow the P2P Device to be discoverable on other 772 * channels in addition to its listen channel. 773 * Note that this flag should not be set in other cases as it opens the 774 * Rx filters on all MAC and increases the number of interrupts. 775 */ 776 ieee80211_iterate_active_interfaces_atomic( 777 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 778 iwl_mvm_go_iterator, &data); 779 780 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 781 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 782 } 783 784 void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 785 __le32 *tim_index, __le32 *tim_size, 786 u8 *beacon, u32 frame_size) 787 { 788 u32 tim_idx; 789 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 790 791 /* The index is relative to frame start but we start looking at the 792 * variable-length part of the beacon. */ 793 tim_idx = mgmt->u.beacon.variable - beacon; 794 795 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 796 while ((tim_idx < (frame_size - 2)) && 797 (beacon[tim_idx] != WLAN_EID_TIM)) 798 tim_idx += beacon[tim_idx+1] + 2; 799 800 /* If TIM field was found, set variables */ 801 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 802 *tim_index = cpu_to_le32(tim_idx); 803 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 804 } else { 805 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 806 } 807 } 808 809 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 810 { 811 struct ieee80211_mgmt *mgmt = (void *)beacon; 812 const u8 *ie; 813 814 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 815 return 0; 816 817 frame_size -= mgmt->u.beacon.variable - beacon; 818 819 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 820 if (!ie) 821 return 0; 822 823 return ie - beacon; 824 } 825 826 u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info, 827 struct ieee80211_vif *vif) 828 { 829 u8 rate; 830 831 if (info->band == NL80211_BAND_5GHZ || vif->p2p) 832 rate = IWL_FIRST_OFDM_RATE; 833 else 834 rate = IWL_FIRST_CCK_RATE; 835 836 return rate; 837 } 838 839 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm, 840 struct ieee80211_vif *vif, 841 struct sk_buff *beacon, 842 struct iwl_tx_cmd *tx) 843 { 844 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 845 struct ieee80211_tx_info *info; 846 u8 rate; 847 u32 tx_flags; 848 849 info = IEEE80211_SKB_CB(beacon); 850 851 /* Set up TX command fields */ 852 tx->len = cpu_to_le16((u16)beacon->len); 853 tx->sta_id = mvmvif->bcast_sta.sta_id; 854 tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 855 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 856 tx_flags |= 857 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 858 TX_CMD_FLG_BT_PRIO_POS; 859 tx->tx_flags = cpu_to_le32(tx_flags); 860 861 if (!fw_has_capa(&mvm->fw->ucode_capa, 862 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) 863 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 864 865 tx->rate_n_flags = 866 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 867 RATE_MCS_ANT_POS); 868 869 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif); 870 871 tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 872 if (rate == IWL_FIRST_CCK_RATE) 873 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); 874 875 } 876 877 int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm, 878 struct sk_buff *beacon, 879 void *data, int len) 880 { 881 struct iwl_host_cmd cmd = { 882 .id = BEACON_TEMPLATE_CMD, 883 .flags = CMD_ASYNC, 884 }; 885 886 cmd.len[0] = len; 887 cmd.data[0] = data; 888 cmd.dataflags[0] = 0; 889 cmd.len[1] = beacon->len; 890 cmd.data[1] = beacon->data; 891 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 892 893 return iwl_mvm_send_cmd(mvm, &cmd); 894 } 895 896 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm, 897 struct ieee80211_vif *vif, 898 struct sk_buff *beacon) 899 { 900 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 901 struct iwl_mac_beacon_cmd_v6 beacon_cmd = {}; 902 903 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); 904 905 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 906 907 if (vif->type == NL80211_IFTYPE_AP) 908 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 909 &beacon_cmd.tim_size, 910 beacon->data, beacon->len); 911 912 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 913 sizeof(beacon_cmd)); 914 } 915 916 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm, 917 struct ieee80211_vif *vif, 918 struct sk_buff *beacon) 919 { 920 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 921 struct iwl_mac_beacon_cmd_v7 beacon_cmd = {}; 922 923 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); 924 925 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 926 927 if (vif->type == NL80211_IFTYPE_AP) 928 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 929 &beacon_cmd.tim_size, 930 beacon->data, beacon->len); 931 932 beacon_cmd.csa_offset = 933 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 934 WLAN_EID_CHANNEL_SWITCH, 935 beacon->len)); 936 beacon_cmd.ecsa_offset = 937 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 938 WLAN_EID_EXT_CHANSWITCH_ANN, 939 beacon->len)); 940 941 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 942 sizeof(beacon_cmd)); 943 } 944 945 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm, 946 struct ieee80211_vif *vif, 947 struct sk_buff *beacon) 948 { 949 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 950 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon); 951 struct iwl_mac_beacon_cmd beacon_cmd = {}; 952 u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif); 953 u16 flags; 954 955 flags = iwl_mvm_mac80211_idx_to_hwrate(rate); 956 957 if (rate == IWL_FIRST_CCK_RATE) 958 flags |= IWL_MAC_BEACON_CCK; 959 960 beacon_cmd.flags = cpu_to_le16(flags); 961 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len); 962 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 963 964 if (vif->type == NL80211_IFTYPE_AP) 965 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, 966 &beacon_cmd.tim_size, 967 beacon->data, beacon->len); 968 969 beacon_cmd.csa_offset = 970 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 971 WLAN_EID_CHANNEL_SWITCH, 972 beacon->len)); 973 beacon_cmd.ecsa_offset = 974 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, 975 WLAN_EID_EXT_CHANSWITCH_ANN, 976 beacon->len)); 977 978 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, 979 sizeof(beacon_cmd)); 980 } 981 982 int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 983 struct ieee80211_vif *vif, 984 struct sk_buff *beacon) 985 { 986 if (WARN_ON(!beacon)) 987 return -EINVAL; 988 989 if (IWL_MVM_NON_TRANSMITTING_AP) 990 return 0; 991 992 if (!fw_has_capa(&mvm->fw->ucode_capa, 993 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) 994 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon); 995 996 if (fw_has_api(&mvm->fw->ucode_capa, 997 IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE)) 998 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon); 999 1000 return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon); 1001 } 1002 1003 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1004 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1005 struct ieee80211_vif *vif) 1006 { 1007 struct sk_buff *beacon; 1008 int ret; 1009 1010 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1011 vif->type != NL80211_IFTYPE_ADHOC); 1012 1013 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1014 if (!beacon) 1015 return -ENOMEM; 1016 1017 #ifdef CONFIG_IWLWIFI_DEBUGFS 1018 if (mvm->beacon_inject_active) 1019 return -EBUSY; 1020 #endif 1021 1022 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1023 dev_kfree_skb(beacon); 1024 return ret; 1025 } 1026 1027 struct iwl_mvm_mac_ap_iterator_data { 1028 struct iwl_mvm *mvm; 1029 struct ieee80211_vif *vif; 1030 u32 beacon_device_ts; 1031 u16 beacon_int; 1032 }; 1033 1034 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1035 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1036 struct ieee80211_vif *vif) 1037 { 1038 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1039 1040 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1041 return; 1042 1043 /* Station client has higher priority over P2P client*/ 1044 if (vif->p2p && data->beacon_device_ts) 1045 return; 1046 1047 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1048 data->beacon_int = vif->bss_conf.beacon_int; 1049 } 1050 1051 /* 1052 * Fill the specific data for mac context of type AP of P2P GO 1053 */ 1054 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1055 struct ieee80211_vif *vif, 1056 struct iwl_mac_ctx_cmd *cmd, 1057 struct iwl_mac_data_ap *ctxt_ap, 1058 bool add) 1059 { 1060 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1061 struct iwl_mvm_mac_ap_iterator_data data = { 1062 .mvm = mvm, 1063 .vif = vif, 1064 .beacon_device_ts = 0 1065 }; 1066 1067 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1068 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1069 1070 /* 1071 * in AP mode, pass probe requests and beacons from other APs 1072 * (needed for ht protection); when there're no any associated 1073 * station don't ask FW to pass beacons to prevent unnecessary 1074 * wake-ups. 1075 */ 1076 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1077 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1078 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1079 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1080 } else { 1081 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1082 } 1083 1084 if (vif->bss_conf.he_support && !iwlwifi_mod_params.disable_11ax) 1085 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_11AX); 1086 1087 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1088 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1089 vif->bss_conf.dtim_period); 1090 1091 if (!fw_has_api(&mvm->fw->ucode_capa, 1092 IWL_UCODE_TLV_API_STA_TYPE)) 1093 ctxt_ap->mcast_qid = cpu_to_le32(mvmvif->cab_queue); 1094 1095 /* 1096 * Only set the beacon time when the MAC is being added, when we 1097 * just modify the MAC then we should keep the time -- the firmware 1098 * can otherwise have a "jumping" TBTT. 1099 */ 1100 if (add) { 1101 /* 1102 * If there is a station/P2P client interface which is 1103 * associated, set the AP's TBTT far enough from the station's 1104 * TBTT. Otherwise, set it to the current system time 1105 */ 1106 ieee80211_iterate_active_interfaces_atomic( 1107 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1108 iwl_mvm_mac_ap_iterator, &data); 1109 1110 if (data.beacon_device_ts) { 1111 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1112 mvmvif->ap_beacon_time = data.beacon_device_ts + 1113 ieee80211_tu_to_usec(data.beacon_int * rand / 1114 100); 1115 } else { 1116 mvmvif->ap_beacon_time = iwl_mvm_get_systime(mvm); 1117 } 1118 } 1119 1120 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1121 ctxt_ap->beacon_tsf = 0; /* unused */ 1122 1123 /* TODO: Assume that the beacon id == mac context id */ 1124 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1125 } 1126 1127 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1128 struct ieee80211_vif *vif, 1129 u32 action) 1130 { 1131 struct iwl_mac_ctx_cmd cmd = {}; 1132 1133 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1134 1135 /* Fill the common data for all mac context types */ 1136 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1137 1138 /* Fill the data specific for ap mode */ 1139 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1140 action == FW_CTXT_ACTION_ADD); 1141 1142 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1143 } 1144 1145 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1146 struct ieee80211_vif *vif, 1147 u32 action) 1148 { 1149 struct iwl_mac_ctx_cmd cmd = {}; 1150 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1151 1152 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1153 1154 /* Fill the common data for all mac context types */ 1155 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1156 1157 /* Fill the data specific for GO mode */ 1158 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1159 action == FW_CTXT_ACTION_ADD); 1160 1161 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1162 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1163 cmd.go.opp_ps_enabled = 1164 cpu_to_le32(!!(noa->oppps_ctwindow & 1165 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1166 1167 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1168 } 1169 1170 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1171 u32 action, bool force_assoc_off, 1172 const u8 *bssid_override) 1173 { 1174 switch (vif->type) { 1175 case NL80211_IFTYPE_STATION: 1176 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1177 force_assoc_off, 1178 bssid_override); 1179 break; 1180 case NL80211_IFTYPE_AP: 1181 if (!vif->p2p) 1182 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1183 else 1184 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1185 break; 1186 case NL80211_IFTYPE_MONITOR: 1187 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1188 case NL80211_IFTYPE_P2P_DEVICE: 1189 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1190 case NL80211_IFTYPE_ADHOC: 1191 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1192 default: 1193 break; 1194 } 1195 1196 return -EOPNOTSUPP; 1197 } 1198 1199 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1200 { 1201 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1202 int ret; 1203 1204 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1205 vif->addr, ieee80211_vif_type_p2p(vif))) 1206 return -EIO; 1207 1208 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1209 true, NULL); 1210 if (ret) 1211 return ret; 1212 1213 /* will only do anything at resume from D3 time */ 1214 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1215 1216 mvmvif->uploaded = true; 1217 return 0; 1218 } 1219 1220 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1221 bool force_assoc_off, const u8 *bssid_override) 1222 { 1223 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1224 1225 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1226 vif->addr, ieee80211_vif_type_p2p(vif))) 1227 return -EIO; 1228 1229 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1230 force_assoc_off, bssid_override); 1231 } 1232 1233 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1234 { 1235 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1236 struct iwl_mac_ctx_cmd cmd; 1237 int ret; 1238 1239 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1240 vif->addr, ieee80211_vif_type_p2p(vif))) 1241 return -EIO; 1242 1243 memset(&cmd, 0, sizeof(cmd)); 1244 1245 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1246 mvmvif->color)); 1247 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1248 1249 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1250 sizeof(cmd), &cmd); 1251 if (ret) { 1252 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1253 return ret; 1254 } 1255 1256 mvmvif->uploaded = false; 1257 1258 if (vif->type == NL80211_IFTYPE_MONITOR) { 1259 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1260 iwl_mvm_dealloc_snif_sta(mvm); 1261 } 1262 1263 return 0; 1264 } 1265 1266 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1267 struct ieee80211_vif *csa_vif, u32 gp2, 1268 bool tx_success) 1269 { 1270 struct iwl_mvm_vif *mvmvif = 1271 iwl_mvm_vif_from_mac80211(csa_vif); 1272 1273 /* Don't start to countdown from a failed beacon */ 1274 if (!tx_success && !mvmvif->csa_countdown) 1275 return; 1276 1277 mvmvif->csa_countdown = true; 1278 1279 if (!ieee80211_csa_is_complete(csa_vif)) { 1280 int c = ieee80211_csa_update_counter(csa_vif); 1281 1282 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1283 if (csa_vif->p2p && 1284 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1285 tx_success) { 1286 u32 rel_time = (c + 1) * 1287 csa_vif->bss_conf.beacon_int - 1288 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1289 u32 apply_time = gp2 + rel_time * 1024; 1290 1291 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1292 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1293 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1294 apply_time); 1295 } 1296 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1297 /* we don't have CSA NoA scheduled yet, switch now */ 1298 ieee80211_csa_finish(csa_vif); 1299 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1300 } 1301 } 1302 1303 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1304 struct iwl_rx_cmd_buffer *rxb) 1305 { 1306 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1307 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1308 struct iwl_extended_beacon_notif_v5 *beacon_v5 = (void *)pkt->data; 1309 struct ieee80211_vif *csa_vif; 1310 struct ieee80211_vif *tx_blocked_vif; 1311 struct agg_tx_status *agg_status; 1312 u16 status; 1313 1314 lockdep_assert_held(&mvm->mutex); 1315 1316 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1317 1318 if (!iwl_mvm_is_short_beacon_notif_supported(mvm)) { 1319 struct iwl_mvm_tx_resp *beacon_notify_hdr = 1320 &beacon_v5->beacon_notify_hdr; 1321 1322 mvm->ibss_manager = beacon_v5->ibss_mgr_status != 0; 1323 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr); 1324 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK; 1325 IWL_DEBUG_RX(mvm, 1326 "beacon status %#x retries:%d tsf:0x%016llX gp2:0x%X rate:%d\n", 1327 status, beacon_notify_hdr->failure_frame, 1328 le64_to_cpu(beacon->tsf), 1329 mvm->ap_last_beacon_gp2, 1330 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1331 } else { 1332 mvm->ibss_manager = beacon->ibss_mgr_status != 0; 1333 status = le32_to_cpu(beacon->status) & TX_STATUS_MSK; 1334 IWL_DEBUG_RX(mvm, 1335 "beacon status %#x tsf:0x%016llX gp2:0x%X\n", 1336 status, le64_to_cpu(beacon->tsf), 1337 mvm->ap_last_beacon_gp2); 1338 } 1339 1340 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1341 lockdep_is_held(&mvm->mutex)); 1342 if (unlikely(csa_vif && csa_vif->csa_active)) 1343 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1344 (status == TX_STATUS_SUCCESS)); 1345 1346 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1347 lockdep_is_held(&mvm->mutex)); 1348 if (unlikely(tx_blocked_vif)) { 1349 struct iwl_mvm_vif *mvmvif = 1350 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1351 1352 /* 1353 * The channel switch is started and we have blocked the 1354 * stations. If this is the first beacon (the timeout wasn't 1355 * set), set the unblock timeout, otherwise countdown 1356 */ 1357 if (!mvm->csa_tx_block_bcn_timeout) 1358 mvm->csa_tx_block_bcn_timeout = 1359 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1360 else 1361 mvm->csa_tx_block_bcn_timeout--; 1362 1363 /* Check if the timeout is expired, and unblock tx */ 1364 if (mvm->csa_tx_block_bcn_timeout == 0) { 1365 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1366 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1367 } 1368 } 1369 } 1370 1371 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1372 struct iwl_rx_cmd_buffer *rxb) 1373 { 1374 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1375 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1376 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1377 struct iwl_fw_dbg_trigger_tlv *trigger; 1378 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1379 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1380 struct ieee80211_vif *vif; 1381 u32 id = le32_to_cpu(mb->mac_id); 1382 1383 IWL_DEBUG_INFO(mvm, 1384 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1385 le32_to_cpu(mb->mac_id), 1386 le32_to_cpu(mb->consec_missed_beacons), 1387 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1388 le32_to_cpu(mb->num_recvd_beacons), 1389 le32_to_cpu(mb->num_expected_beacons)); 1390 1391 rcu_read_lock(); 1392 1393 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true); 1394 if (!vif) 1395 goto out; 1396 1397 rx_missed_bcon = le32_to_cpu(mb->consec_missed_beacons); 1398 rx_missed_bcon_since_rx = 1399 le32_to_cpu(mb->consec_missed_beacons_since_last_rx); 1400 /* 1401 * TODO: the threshold should be adjusted based on latency conditions, 1402 * and/or in case of a CS flow on one of the other AP vifs. 1403 */ 1404 if (rx_missed_bcon > IWL_MVM_MISSED_BEACONS_THRESHOLD_LONG) 1405 iwl_mvm_connection_loss(mvm, vif, "missed beacons"); 1406 else if (rx_missed_bcon_since_rx > IWL_MVM_MISSED_BEACONS_THRESHOLD) 1407 ieee80211_beacon_loss(vif); 1408 1409 trigger = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif), 1410 FW_DBG_TRIGGER_MISSED_BEACONS); 1411 if (!trigger) 1412 goto out; 1413 1414 bcon_trig = (void *)trigger->data; 1415 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1416 stop_trig_missed_bcon_since_rx = 1417 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1418 1419 /* TODO: implement start trigger */ 1420 1421 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1422 rx_missed_bcon >= stop_trig_missed_bcon) 1423 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL); 1424 1425 iwl_fw_dbg_apply_point(&mvm->fwrt, IWL_FW_INI_APPLY_MISSED_BEACONS); 1426 1427 out: 1428 rcu_read_unlock(); 1429 } 1430 1431 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1432 struct iwl_rx_cmd_buffer *rxb) 1433 { 1434 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1435 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1436 struct ieee80211_rx_status rx_status; 1437 struct sk_buff *skb; 1438 u32 size = le32_to_cpu(sb->byte_count); 1439 1440 if (size == 0) 1441 return; 1442 1443 skb = alloc_skb(size, GFP_ATOMIC); 1444 if (!skb) { 1445 IWL_ERR(mvm, "alloc_skb failed\n"); 1446 return; 1447 } 1448 1449 /* update rx_status according to the notification's metadata */ 1450 memset(&rx_status, 0, sizeof(rx_status)); 1451 rx_status.mactime = le64_to_cpu(sb->tsf); 1452 /* TSF as indicated by the firmware is at INA time */ 1453 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1454 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1455 rx_status.band = 1456 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1457 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1458 rx_status.freq = 1459 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1460 rx_status.band); 1461 1462 /* copy the data */ 1463 skb_put_data(skb, sb->data, size); 1464 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1465 1466 /* pass it as regular rx to mac80211 */ 1467 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1468 } 1469 1470 void iwl_mvm_probe_resp_data_notif(struct iwl_mvm *mvm, 1471 struct iwl_rx_cmd_buffer *rxb) 1472 { 1473 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1474 struct iwl_probe_resp_data_notif *notif = (void *)pkt->data; 1475 struct iwl_probe_resp_data *old_data, *new_data; 1476 int len = iwl_rx_packet_payload_len(pkt); 1477 u32 id = le32_to_cpu(notif->mac_id); 1478 struct ieee80211_vif *vif; 1479 struct iwl_mvm_vif *mvmvif; 1480 1481 if (WARN_ON_ONCE(len < sizeof(*notif))) 1482 return; 1483 1484 IWL_DEBUG_INFO(mvm, "Probe response data notif: noa %d, csa %d\n", 1485 notif->noa_active, notif->csa_counter); 1486 1487 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, false); 1488 if (!vif) 1489 return; 1490 1491 mvmvif = iwl_mvm_vif_from_mac80211(vif); 1492 1493 new_data = kzalloc(sizeof(*new_data), GFP_KERNEL); 1494 if (!new_data) 1495 return; 1496 1497 memcpy(&new_data->notif, notif, sizeof(new_data->notif)); 1498 1499 /* noa_attr contains 1 reserved byte, need to substruct it */ 1500 new_data->noa_len = sizeof(struct ieee80211_vendor_ie) + 1501 sizeof(new_data->notif.noa_attr) - 1; 1502 1503 /* 1504 * If it's a one time NoA, only one descriptor is needed, 1505 * adjust the length according to len_low. 1506 */ 1507 if (new_data->notif.noa_attr.len_low == 1508 sizeof(struct ieee80211_p2p_noa_desc) + 2) 1509 new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc); 1510 1511 old_data = rcu_dereference_protected(mvmvif->probe_resp_data, 1512 lockdep_is_held(&mvmvif->mvm->mutex)); 1513 rcu_assign_pointer(mvmvif->probe_resp_data, new_data); 1514 1515 if (old_data) 1516 kfree_rcu(old_data, rcu_head); 1517 1518 if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA && 1519 notif->csa_counter >= 1) 1520 ieee80211_csa_set_counter(vif, notif->csa_counter); 1521 } 1522 1523 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1524 struct iwl_rx_cmd_buffer *rxb) 1525 { 1526 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1527 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1528 struct ieee80211_vif *csa_vif, *vif; 1529 struct iwl_mvm_vif *mvmvif; 1530 int len = iwl_rx_packet_payload_len(pkt); 1531 u32 id_n_color, csa_id, mac_id; 1532 1533 if (WARN_ON_ONCE(len < sizeof(*notif))) 1534 return; 1535 1536 id_n_color = le32_to_cpu(notif->id_and_color); 1537 mac_id = id_n_color & FW_CTXT_ID_MSK; 1538 1539 if (WARN_ON_ONCE(mac_id >= NUM_MAC_INDEX_DRIVER)) 1540 return; 1541 1542 rcu_read_lock(); 1543 vif = rcu_dereference(mvm->vif_id_to_mac[mac_id]); 1544 mvmvif = iwl_mvm_vif_from_mac80211(vif); 1545 1546 switch (vif->type) { 1547 case NL80211_IFTYPE_AP: 1548 csa_vif = rcu_dereference(mvm->csa_vif); 1549 if (WARN_ON(!csa_vif || !csa_vif->csa_active || 1550 csa_vif != vif)) 1551 goto out_unlock; 1552 1553 csa_id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 1554 if (WARN(csa_id != id_n_color, 1555 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1556 csa_id, id_n_color)) 1557 goto out_unlock; 1558 1559 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1560 1561 schedule_delayed_work(&mvm->cs_tx_unblock_dwork, 1562 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1563 csa_vif->bss_conf.beacon_int)); 1564 1565 ieee80211_csa_finish(csa_vif); 1566 1567 rcu_read_unlock(); 1568 1569 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1570 return; 1571 case NL80211_IFTYPE_STATION: 1572 iwl_mvm_csa_client_absent(mvm, vif); 1573 cancel_delayed_work(&mvmvif->csa_work); 1574 ieee80211_chswitch_done(vif, true); 1575 break; 1576 default: 1577 /* should never happen */ 1578 WARN_ON_ONCE(1); 1579 break; 1580 } 1581 out_unlock: 1582 rcu_read_unlock(); 1583 } 1584