1/****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 42 * * Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * * Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in 46 * the documentation and/or other materials provided with the 47 * distribution. 48 * * Neither the name Intel Corporation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 * 64 *****************************************************************************/ 65 66#include <linux/etherdevice.h> 67#include <net/mac80211.h> 68#include "iwl-io.h" 69#include "iwl-prph.h" 70#include "fw-api.h" 71#include "mvm.h" 72#include "time-event.h" 73 74const u8 iwl_mvm_ac_to_tx_fifo[] = { 75 IWL_MVM_TX_FIFO_VO, 76 IWL_MVM_TX_FIFO_VI, 77 IWL_MVM_TX_FIFO_BE, 78 IWL_MVM_TX_FIFO_BK, 79}; 80 81struct iwl_mvm_mac_iface_iterator_data { 82 struct iwl_mvm *mvm; 83 struct ieee80211_vif *vif; 84 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; 85 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; 86 u32 used_hw_queues; 87 enum iwl_tsf_id preferred_tsf; 88 bool found_vif; 89}; 90 91static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 92 struct ieee80211_vif *vif) 93{ 94 struct iwl_mvm_mac_iface_iterator_data *data = _data; 95 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 96 u16 min_bi; 97 98 /* Skip the interface for which we are trying to assign a tsf_id */ 99 if (vif == data->vif) 100 return; 101 102 /* 103 * The TSF is a hardware/firmware resource, there are 4 and 104 * the driver should assign and free them as needed. However, 105 * there are cases where 2 MACs should share the same TSF ID 106 * for the purpose of clock sync, an optimization to avoid 107 * clock drift causing overlapping TBTTs/DTIMs for a GO and 108 * client in the system. 109 * 110 * The firmware will decide according to the MAC type which 111 * will be the master and slave. Clients that need to sync 112 * with a remote station will be the master, and an AP or GO 113 * will be the slave. 114 * 115 * Depending on the new interface type it can be slaved to 116 * or become the master of an existing interface. 117 */ 118 switch (data->vif->type) { 119 case NL80211_IFTYPE_STATION: 120 /* 121 * The new interface is a client, so if the one we're iterating 122 * is an AP, and the beacon interval of the AP is a multiple or 123 * divisor of the beacon interval of the client, the same TSF 124 * should be used to avoid drift between the new client and 125 * existing AP. The existing AP will get drift updates from the 126 * new client context in this case. 127 */ 128 if (vif->type != NL80211_IFTYPE_AP || 129 data->preferred_tsf != NUM_TSF_IDS || 130 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 131 break; 132 133 min_bi = min(data->vif->bss_conf.beacon_int, 134 vif->bss_conf.beacon_int); 135 136 if (!min_bi) 137 break; 138 139 if ((data->vif->bss_conf.beacon_int - 140 vif->bss_conf.beacon_int) % min_bi == 0) { 141 data->preferred_tsf = mvmvif->tsf_id; 142 return; 143 } 144 break; 145 146 case NL80211_IFTYPE_AP: 147 /* 148 * The new interface is AP/GO, so if its beacon interval is a 149 * multiple or a divisor of the beacon interval of an existing 150 * interface, it should get drift updates from an existing 151 * client or use the same TSF as an existing GO. There's no 152 * drift between TSFs internally but if they used different 153 * TSFs then a new client MAC could update one of them and 154 * cause drift that way. 155 */ 156 if ((vif->type != NL80211_IFTYPE_AP && 157 vif->type != NL80211_IFTYPE_STATION) || 158 data->preferred_tsf != NUM_TSF_IDS || 159 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 160 break; 161 162 min_bi = min(data->vif->bss_conf.beacon_int, 163 vif->bss_conf.beacon_int); 164 165 if (!min_bi) 166 break; 167 168 if ((data->vif->bss_conf.beacon_int - 169 vif->bss_conf.beacon_int) % min_bi == 0) { 170 data->preferred_tsf = mvmvif->tsf_id; 171 return; 172 } 173 break; 174 default: 175 /* 176 * For all other interface types there's no need to 177 * take drift into account. Either they're exclusive 178 * like IBSS and monitor, or we don't care much about 179 * their TSF (like P2P Device), but we won't be able 180 * to share the TSF resource. 181 */ 182 break; 183 } 184 185 /* 186 * Unless we exited above, we can't share the TSF resource 187 * that the virtual interface we're iterating over is using 188 * with the new one, so clear the available bit and if this 189 * was the preferred one, reset that as well. 190 */ 191 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 192 193 if (data->preferred_tsf == mvmvif->tsf_id) 194 data->preferred_tsf = NUM_TSF_IDS; 195} 196 197/* 198 * Get the mask of the queues used by the vif 199 */ 200u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm, 201 struct ieee80211_vif *vif) 202{ 203 u32 qmask = 0, ac; 204 205 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 206 return BIT(IWL_MVM_OFFCHANNEL_QUEUE); 207 208 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 209 qmask |= BIT(vif->hw_queue[ac]); 210 211 if (vif->type == NL80211_IFTYPE_AP) 212 qmask |= BIT(vif->cab_queue); 213 214 return qmask; 215} 216 217static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 218 struct ieee80211_vif *vif) 219{ 220 struct iwl_mvm_mac_iface_iterator_data *data = _data; 221 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 222 223 /* Iterator may already find the interface being added -- skip it */ 224 if (vif == data->vif) { 225 data->found_vif = true; 226 return; 227 } 228 229 /* Mark the queues used by the vif */ 230 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(data->mvm, vif); 231 232 /* Mark MAC IDs as used by clearing the available bit, and 233 * (below) mark TSFs as used if their existing use is not 234 * compatible with the new interface type. 235 * No locking or atomic bit operations are needed since the 236 * data is on the stack of the caller function. 237 */ 238 __clear_bit(mvmvif->id, data->available_mac_ids); 239 240 /* find a suitable tsf_id */ 241 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 242} 243 244void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 245 struct ieee80211_vif *vif) 246{ 247 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 248 struct iwl_mvm_mac_iface_iterator_data data = { 249 .mvm = mvm, 250 .vif = vif, 251 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 252 /* no preference yet */ 253 .preferred_tsf = NUM_TSF_IDS, 254 }; 255 256 ieee80211_iterate_active_interfaces_atomic( 257 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 258 iwl_mvm_mac_tsf_id_iter, &data); 259 260 if (data.preferred_tsf != NUM_TSF_IDS) 261 mvmvif->tsf_id = data.preferred_tsf; 262 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 263 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 264 NUM_TSF_IDS); 265} 266 267static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, 268 struct ieee80211_vif *vif) 269{ 270 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 271 struct iwl_mvm_mac_iface_iterator_data data = { 272 .mvm = mvm, 273 .vif = vif, 274 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 275 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 276 /* no preference yet */ 277 .preferred_tsf = NUM_TSF_IDS, 278 .used_hw_queues = 279 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 280 BIT(mvm->aux_queue) | 281 BIT(IWL_MVM_CMD_QUEUE), 282 .found_vif = false, 283 }; 284 u32 ac; 285 int ret, i; 286 unsigned long used_hw_queues; 287 288 /* 289 * Allocate a MAC ID and a TSF for this MAC, along with the queues 290 * and other resources. 291 */ 292 293 /* 294 * Before the iterator, we start with all MAC IDs and TSFs available. 295 * 296 * During iteration, all MAC IDs are cleared that are in use by other 297 * virtual interfaces, and all TSF IDs are cleared that can't be used 298 * by this new virtual interface because they're used by an interface 299 * that can't share it with the new one. 300 * At the same time, we check if there's a preferred TSF in the case 301 * that we should share it with another interface. 302 */ 303 304 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 305 switch (vif->type) { 306 case NL80211_IFTYPE_ADHOC: 307 break; 308 case NL80211_IFTYPE_STATION: 309 if (!vif->p2p) 310 break; 311 /* fall through */ 312 default: 313 __clear_bit(0, data.available_mac_ids); 314 } 315 316 ieee80211_iterate_active_interfaces_atomic( 317 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 318 iwl_mvm_mac_iface_iterator, &data); 319 320 /* 321 * In the case we're getting here during resume, it's similar to 322 * firmware restart, and with RESUME_ALL the iterator will find 323 * the vif being added already. 324 * We don't want to reassign any IDs in either case since doing 325 * so would probably assign different IDs (as interfaces aren't 326 * necessarily added in the same order), but the old IDs were 327 * preserved anyway, so skip ID assignment for both resume and 328 * recovery. 329 */ 330 if (data.found_vif) 331 return 0; 332 333 /* Therefore, in recovery, we can't get here */ 334 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 335 return -EBUSY; 336 337 mvmvif->id = find_first_bit(data.available_mac_ids, 338 NUM_MAC_INDEX_DRIVER); 339 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 340 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 341 ret = -EIO; 342 goto exit_fail; 343 } 344 345 if (data.preferred_tsf != NUM_TSF_IDS) 346 mvmvif->tsf_id = data.preferred_tsf; 347 else 348 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 349 NUM_TSF_IDS); 350 if (mvmvif->tsf_id == NUM_TSF_IDS) { 351 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 352 ret = -EIO; 353 goto exit_fail; 354 } 355 356 mvmvif->color = 0; 357 358 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 359 mvmvif->time_event_data.id = TE_MAX; 360 361 /* No need to allocate data queues to P2P Device MAC.*/ 362 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 363 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 364 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 365 366 return 0; 367 } 368 369 used_hw_queues = data.used_hw_queues; 370 371 /* Find available queues, and allocate them to the ACs */ 372 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 373 u8 queue = find_first_zero_bit(&used_hw_queues, 374 mvm->first_agg_queue); 375 376 if (queue >= mvm->first_agg_queue) { 377 IWL_ERR(mvm, "Failed to allocate queue\n"); 378 ret = -EIO; 379 goto exit_fail; 380 } 381 382 __set_bit(queue, &used_hw_queues); 383 vif->hw_queue[ac] = queue; 384 } 385 386 /* Allocate the CAB queue for softAP and GO interfaces */ 387 if (vif->type == NL80211_IFTYPE_AP) { 388 u8 queue = find_first_zero_bit(&used_hw_queues, 389 mvm->first_agg_queue); 390 391 if (queue >= mvm->first_agg_queue) { 392 IWL_ERR(mvm, "Failed to allocate cab queue\n"); 393 ret = -EIO; 394 goto exit_fail; 395 } 396 397 vif->cab_queue = queue; 398 } else { 399 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 400 } 401 402 mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; 403 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 404 405 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 406 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 407 408 return 0; 409 410exit_fail: 411 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 412 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 413 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 414 return ret; 415} 416 417int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 418{ 419 u32 ac; 420 int ret; 421 422 lockdep_assert_held(&mvm->mutex); 423 424 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 425 if (ret) 426 return ret; 427 428 switch (vif->type) { 429 case NL80211_IFTYPE_P2P_DEVICE: 430 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 431 IWL_MVM_TX_FIFO_VO); 432 break; 433 case NL80211_IFTYPE_AP: 434 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, 435 IWL_MVM_TX_FIFO_MCAST); 436 /* fall through */ 437 default: 438 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 439 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 440 iwl_mvm_ac_to_tx_fifo[ac]); 441 break; 442 } 443 444 return 0; 445} 446 447void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 448{ 449 int ac; 450 451 lockdep_assert_held(&mvm->mutex); 452 453 switch (vif->type) { 454 case NL80211_IFTYPE_P2P_DEVICE: 455 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE); 456 break; 457 case NL80211_IFTYPE_AP: 458 iwl_mvm_disable_txq(mvm, vif->cab_queue); 459 /* fall through */ 460 default: 461 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 462 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac]); 463 } 464} 465 466static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 467 struct ieee80211_vif *vif, 468 enum ieee80211_band band, 469 u8 *cck_rates, u8 *ofdm_rates) 470{ 471 struct ieee80211_supported_band *sband; 472 unsigned long basic = vif->bss_conf.basic_rates; 473 int lowest_present_ofdm = 100; 474 int lowest_present_cck = 100; 475 u8 cck = 0; 476 u8 ofdm = 0; 477 int i; 478 479 sband = mvm->hw->wiphy->bands[band]; 480 481 for_each_set_bit(i, &basic, BITS_PER_LONG) { 482 int hw = sband->bitrates[i].hw_value; 483 if (hw >= IWL_FIRST_OFDM_RATE) { 484 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 485 if (lowest_present_ofdm > hw) 486 lowest_present_ofdm = hw; 487 } else { 488 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 489 490 cck |= BIT(hw); 491 if (lowest_present_cck > hw) 492 lowest_present_cck = hw; 493 } 494 } 495 496 /* 497 * Now we've got the basic rates as bitmaps in the ofdm and cck 498 * variables. This isn't sufficient though, as there might not 499 * be all the right rates in the bitmap. E.g. if the only basic 500 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 501 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 502 * 503 * [...] a STA responding to a received frame shall transmit 504 * its Control Response frame [...] at the highest rate in the 505 * BSSBasicRateSet parameter that is less than or equal to the 506 * rate of the immediately previous frame in the frame exchange 507 * sequence ([...]) and that is of the same modulation class 508 * ([...]) as the received frame. If no rate contained in the 509 * BSSBasicRateSet parameter meets these conditions, then the 510 * control frame sent in response to a received frame shall be 511 * transmitted at the highest mandatory rate of the PHY that is 512 * less than or equal to the rate of the received frame, and 513 * that is of the same modulation class as the received frame. 514 * 515 * As a consequence, we need to add all mandatory rates that are 516 * lower than all of the basic rates to these bitmaps. 517 */ 518 519 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 520 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 521 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 522 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 523 /* 6M already there or needed so always add */ 524 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 525 526 /* 527 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 528 * Note, however: 529 * - if no CCK rates are basic, it must be ERP since there must 530 * be some basic rates at all, so they're OFDM => ERP PHY 531 * (or we're in 5 GHz, and the cck bitmap will never be used) 532 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 533 * - if 5.5M is basic, 1M and 2M are mandatory 534 * - if 2M is basic, 1M is mandatory 535 * - if 1M is basic, that's the only valid ACK rate. 536 * As a consequence, it's not as complicated as it sounds, just add 537 * any lower rates to the ACK rate bitmap. 538 */ 539 if (IWL_RATE_11M_INDEX < lowest_present_cck) 540 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 541 if (IWL_RATE_5M_INDEX < lowest_present_cck) 542 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 543 if (IWL_RATE_2M_INDEX < lowest_present_cck) 544 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 545 /* 1M already there or needed so always add */ 546 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 547 548 *cck_rates = cck; 549 *ofdm_rates = ofdm; 550} 551 552static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 553 struct ieee80211_vif *vif, 554 struct iwl_mac_ctx_cmd *cmd) 555{ 556 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 557 u8 protection_mode = vif->bss_conf.ht_operation_mode & 558 IEEE80211_HT_OP_MODE_PROTECTION; 559 /* The fw does not distinguish between ht and fat */ 560 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 561 562 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 563 /* 564 * See section 9.23.3.1 of IEEE 80211-2012. 565 * Nongreenfield HT STAs Present is not supported. 566 */ 567 switch (protection_mode) { 568 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 569 break; 570 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 571 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 572 cmd->protection_flags |= cpu_to_le32(ht_flag); 573 break; 574 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 575 /* Protect when channel wider than 20MHz */ 576 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 577 cmd->protection_flags |= cpu_to_le32(ht_flag); 578 break; 579 default: 580 IWL_ERR(mvm, "Illegal protection mode %d\n", 581 protection_mode); 582 break; 583 } 584} 585 586static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 587 struct ieee80211_vif *vif, 588 struct iwl_mac_ctx_cmd *cmd, 589 const u8 *bssid_override, 590 u32 action) 591{ 592 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 593 struct ieee80211_chanctx_conf *chanctx; 594 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 595 IEEE80211_HT_OP_MODE_PROTECTION); 596 u8 cck_ack_rates, ofdm_ack_rates; 597 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 598 int i; 599 600 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 601 mvmvif->color)); 602 cmd->action = cpu_to_le32(action); 603 604 switch (vif->type) { 605 case NL80211_IFTYPE_STATION: 606 if (vif->p2p) 607 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 608 else 609 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 610 break; 611 case NL80211_IFTYPE_AP: 612 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 613 break; 614 case NL80211_IFTYPE_MONITOR: 615 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 616 break; 617 case NL80211_IFTYPE_P2P_DEVICE: 618 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 619 break; 620 case NL80211_IFTYPE_ADHOC: 621 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 622 break; 623 default: 624 WARN_ON_ONCE(1); 625 } 626 627 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 628 629 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 630 631 if (bssid) 632 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 633 else 634 eth_broadcast_addr(cmd->bssid_addr); 635 636 rcu_read_lock(); 637 chanctx = rcu_dereference(vif->chanctx_conf); 638 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 639 : IEEE80211_BAND_2GHZ, 640 &cck_ack_rates, &ofdm_ack_rates); 641 rcu_read_unlock(); 642 643 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 644 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 645 646 cmd->cck_short_preamble = 647 cpu_to_le32(vif->bss_conf.use_short_preamble ? 648 MAC_FLG_SHORT_PREAMBLE : 0); 649 cmd->short_slot = 650 cpu_to_le32(vif->bss_conf.use_short_slot ? 651 MAC_FLG_SHORT_SLOT : 0); 652 653 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 654 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 655 656 cmd->ac[txf].cw_min = 657 cpu_to_le16(mvmvif->queue_params[i].cw_min); 658 cmd->ac[txf].cw_max = 659 cpu_to_le16(mvmvif->queue_params[i].cw_max); 660 cmd->ac[txf].edca_txop = 661 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 662 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 663 cmd->ac[txf].fifos_mask = BIT(txf); 664 } 665 666 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 667 if (vif->type == NL80211_IFTYPE_AP) 668 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= 669 BIT(IWL_MVM_TX_FIFO_MCAST); 670 671 if (vif->bss_conf.qos) 672 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 673 674 if (vif->bss_conf.use_cts_prot) 675 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 676 677 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 678 vif->bss_conf.use_cts_prot, 679 vif->bss_conf.ht_operation_mode); 680 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 681 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 682 if (ht_enabled) 683 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 684 685 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 686} 687 688static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 689 struct iwl_mac_ctx_cmd *cmd) 690{ 691 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 692 sizeof(*cmd), cmd); 693 if (ret) 694 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 695 le32_to_cpu(cmd->action), ret); 696 return ret; 697} 698 699static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 700 struct ieee80211_vif *vif, 701 u32 action, bool force_assoc_off, 702 const u8 *bssid_override) 703{ 704 struct iwl_mac_ctx_cmd cmd = {}; 705 struct iwl_mac_data_sta *ctxt_sta; 706 707 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 708 709 /* Fill the common data for all mac context types */ 710 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 711 712 if (vif->p2p) { 713 struct ieee80211_p2p_noa_attr *noa = 714 &vif->bss_conf.p2p_noa_attr; 715 716 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 717 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 718 ctxt_sta = &cmd.p2p_sta.sta; 719 } else { 720 ctxt_sta = &cmd.sta; 721 } 722 723 /* We need the dtim_period to set the MAC as associated */ 724 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 725 !force_assoc_off) { 726 u32 dtim_offs; 727 728 /* 729 * The DTIM count counts down, so when it is N that means N 730 * more beacon intervals happen until the DTIM TBTT. Therefore 731 * add this to the current time. If that ends up being in the 732 * future, the firmware will handle it. 733 * 734 * Also note that the system_timestamp (which we get here as 735 * "sync_device_ts") and TSF timestamp aren't at exactly the 736 * same offset in the frame -- the TSF is at the first symbol 737 * of the TSF, the system timestamp is at signal acquisition 738 * time. This means there's an offset between them of at most 739 * a few hundred microseconds (24 * 8 bits + PLCP time gives 740 * 384us in the longest case), this is currently not relevant 741 * as the firmware wakes up around 2ms before the TBTT. 742 */ 743 dtim_offs = vif->bss_conf.sync_dtim_count * 744 vif->bss_conf.beacon_int; 745 /* convert TU to usecs */ 746 dtim_offs *= 1024; 747 748 ctxt_sta->dtim_tsf = 749 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 750 ctxt_sta->dtim_time = 751 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 752 753 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 754 le64_to_cpu(ctxt_sta->dtim_tsf), 755 le32_to_cpu(ctxt_sta->dtim_time), 756 dtim_offs); 757 758 ctxt_sta->is_assoc = cpu_to_le32(1); 759 } else { 760 ctxt_sta->is_assoc = cpu_to_le32(0); 761 762 /* Allow beacons to pass through as long as we are not 763 * associated, or we do not have dtim period information. 764 */ 765 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 766 } 767 768 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 769 ctxt_sta->bi_reciprocal = 770 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 771 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 772 vif->bss_conf.dtim_period); 773 ctxt_sta->dtim_reciprocal = 774 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 775 vif->bss_conf.dtim_period)); 776 777 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 778 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 779 780 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 781} 782 783static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 784 struct ieee80211_vif *vif, 785 u32 action) 786{ 787 struct iwl_mac_ctx_cmd cmd = {}; 788 789 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 790 791 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 792 793 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 794 MAC_FILTER_IN_CONTROL_AND_MGMT | 795 MAC_FILTER_IN_BEACON | 796 MAC_FILTER_IN_PROBE_REQUEST | 797 MAC_FILTER_IN_CRC32); 798 mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; 799 800 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 801} 802 803static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 804 struct ieee80211_vif *vif, 805 u32 action) 806{ 807 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 808 struct iwl_mac_ctx_cmd cmd = {}; 809 810 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 811 812 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 813 814 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 815 MAC_FILTER_IN_PROBE_REQUEST); 816 817 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 818 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 819 cmd.ibss.bi_reciprocal = 820 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 821 822 /* TODO: Assumes that the beacon id == mac context id */ 823 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 824 825 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 826} 827 828struct iwl_mvm_go_iterator_data { 829 bool go_active; 830}; 831 832static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 833{ 834 struct iwl_mvm_go_iterator_data *data = _data; 835 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 836 837 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 838 mvmvif->ap_ibss_active) 839 data->go_active = true; 840} 841 842static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 843 struct ieee80211_vif *vif, 844 u32 action) 845{ 846 struct iwl_mac_ctx_cmd cmd = {}; 847 struct iwl_mvm_go_iterator_data data = {}; 848 849 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 850 851 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 852 853 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 854 855 /* Override the filter flags to accept only probe requests */ 856 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 857 858 /* 859 * This flag should be set to true when the P2P Device is 860 * discoverable and there is at least another active P2P GO. Settings 861 * this flag will allow the P2P Device to be discoverable on other 862 * channels in addition to its listen channel. 863 * Note that this flag should not be set in other cases as it opens the 864 * Rx filters on all MAC and increases the number of interrupts. 865 */ 866 ieee80211_iterate_active_interfaces_atomic( 867 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 868 iwl_mvm_go_iterator, &data); 869 870 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 871 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 872} 873 874static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 875 struct iwl_mac_beacon_cmd *beacon_cmd, 876 u8 *beacon, u32 frame_size) 877{ 878 u32 tim_idx; 879 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 880 881 /* The index is relative to frame start but we start looking at the 882 * variable-length part of the beacon. */ 883 tim_idx = mgmt->u.beacon.variable - beacon; 884 885 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 886 while ((tim_idx < (frame_size - 2)) && 887 (beacon[tim_idx] != WLAN_EID_TIM)) 888 tim_idx += beacon[tim_idx+1] + 2; 889 890 /* If TIM field was found, set variables */ 891 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 892 beacon_cmd->tim_idx = cpu_to_le32(tim_idx); 893 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]); 894 } else { 895 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 896 } 897} 898 899static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 900 struct ieee80211_vif *vif, 901 struct sk_buff *beacon) 902{ 903 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 904 struct iwl_host_cmd cmd = { 905 .id = BEACON_TEMPLATE_CMD, 906 .flags = CMD_ASYNC, 907 }; 908 struct iwl_mac_beacon_cmd beacon_cmd = {}; 909 struct ieee80211_tx_info *info; 910 u32 beacon_skb_len; 911 u32 rate, tx_flags; 912 913 if (WARN_ON(!beacon)) 914 return -EINVAL; 915 916 beacon_skb_len = beacon->len; 917 918 /* TODO: for now the beacon template id is set to be the mac context id. 919 * Might be better to handle it as another resource ... */ 920 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); 921 info = IEEE80211_SKB_CB(beacon); 922 923 /* Set up TX command fields */ 924 beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len); 925 beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id; 926 beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 927 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 928 tx_flags |= 929 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 930 TX_CMD_FLG_BT_PRIO_POS; 931 beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags); 932 933 mvm->mgmt_last_antenna_idx = 934 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant, 935 mvm->mgmt_last_antenna_idx); 936 937 beacon_cmd.tx.rate_n_flags = 938 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 939 RATE_MCS_ANT_POS); 940 941 if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) { 942 rate = IWL_FIRST_OFDM_RATE; 943 } else { 944 rate = IWL_FIRST_CCK_RATE; 945 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); 946 } 947 beacon_cmd.tx.rate_n_flags |= 948 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 949 950 /* Set up TX beacon command fields */ 951 if (vif->type == NL80211_IFTYPE_AP) 952 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd, 953 beacon->data, 954 beacon_skb_len); 955 956 /* Submit command */ 957 cmd.len[0] = sizeof(beacon_cmd); 958 cmd.data[0] = &beacon_cmd; 959 cmd.dataflags[0] = 0; 960 cmd.len[1] = beacon_skb_len; 961 cmd.data[1] = beacon->data; 962 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 963 964 return iwl_mvm_send_cmd(mvm, &cmd); 965} 966 967/* The beacon template for the AP/GO/IBSS has changed and needs update */ 968int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 969 struct ieee80211_vif *vif) 970{ 971 struct sk_buff *beacon; 972 int ret; 973 974 WARN_ON(vif->type != NL80211_IFTYPE_AP && 975 vif->type != NL80211_IFTYPE_ADHOC); 976 977 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 978 if (!beacon) 979 return -ENOMEM; 980 981 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 982 dev_kfree_skb(beacon); 983 return ret; 984} 985 986struct iwl_mvm_mac_ap_iterator_data { 987 struct iwl_mvm *mvm; 988 struct ieee80211_vif *vif; 989 u32 beacon_device_ts; 990 u16 beacon_int; 991}; 992 993/* Find the beacon_device_ts and beacon_int for a managed interface */ 994static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 995 struct ieee80211_vif *vif) 996{ 997 struct iwl_mvm_mac_ap_iterator_data *data = _data; 998 999 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1000 return; 1001 1002 /* Station client has higher priority over P2P client*/ 1003 if (vif->p2p && data->beacon_device_ts) 1004 return; 1005 1006 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1007 data->beacon_int = vif->bss_conf.beacon_int; 1008} 1009 1010/* 1011 * Fill the specific data for mac context of type AP of P2P GO 1012 */ 1013static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1014 struct ieee80211_vif *vif, 1015 struct iwl_mac_data_ap *ctxt_ap, 1016 bool add) 1017{ 1018 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1019 struct iwl_mvm_mac_ap_iterator_data data = { 1020 .mvm = mvm, 1021 .vif = vif, 1022 .beacon_device_ts = 0 1023 }; 1024 1025 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1026 ctxt_ap->bi_reciprocal = 1027 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1028 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1029 vif->bss_conf.dtim_period); 1030 ctxt_ap->dtim_reciprocal = 1031 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1032 vif->bss_conf.dtim_period)); 1033 1034 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1035 1036 /* 1037 * Only set the beacon time when the MAC is being added, when we 1038 * just modify the MAC then we should keep the time -- the firmware 1039 * can otherwise have a "jumping" TBTT. 1040 */ 1041 if (add) { 1042 /* 1043 * If there is a station/P2P client interface which is 1044 * associated, set the AP's TBTT far enough from the station's 1045 * TBTT. Otherwise, set it to the current system time 1046 */ 1047 ieee80211_iterate_active_interfaces_atomic( 1048 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1049 iwl_mvm_mac_ap_iterator, &data); 1050 1051 if (data.beacon_device_ts) { 1052 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1053 mvmvif->ap_beacon_time = data.beacon_device_ts + 1054 ieee80211_tu_to_usec(data.beacon_int * rand / 1055 100); 1056 } else { 1057 mvmvif->ap_beacon_time = 1058 iwl_read_prph(mvm->trans, 1059 DEVICE_SYSTEM_TIME_REG); 1060 } 1061 } 1062 1063 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1064 ctxt_ap->beacon_tsf = 0; /* unused */ 1065 1066 /* TODO: Assume that the beacon id == mac context id */ 1067 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1068} 1069 1070static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1071 struct ieee80211_vif *vif, 1072 u32 action) 1073{ 1074 struct iwl_mac_ctx_cmd cmd = {}; 1075 1076 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1077 1078 /* Fill the common data for all mac context types */ 1079 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1080 1081 /* 1082 * pass probe requests and beacons from other APs (needed 1083 * for ht protection) 1084 */ 1085 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST | 1086 MAC_FILTER_IN_BEACON); 1087 1088 /* Fill the data specific for ap mode */ 1089 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap, 1090 action == FW_CTXT_ACTION_ADD); 1091 1092 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1093} 1094 1095static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1096 struct ieee80211_vif *vif, 1097 u32 action) 1098{ 1099 struct iwl_mac_ctx_cmd cmd = {}; 1100 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1101 1102 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1103 1104 /* Fill the common data for all mac context types */ 1105 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1106 1107 /* 1108 * pass probe requests and beacons from other APs (needed 1109 * for ht protection) 1110 */ 1111 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST | 1112 MAC_FILTER_IN_BEACON); 1113 1114 /* Fill the data specific for GO mode */ 1115 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap, 1116 action == FW_CTXT_ACTION_ADD); 1117 1118 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1119 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1120 cmd.go.opp_ps_enabled = 1121 cpu_to_le32(!!(noa->oppps_ctwindow & 1122 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1123 1124 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1125} 1126 1127static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1128 u32 action, bool force_assoc_off, 1129 const u8 *bssid_override) 1130{ 1131 switch (vif->type) { 1132 case NL80211_IFTYPE_STATION: 1133 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1134 force_assoc_off, 1135 bssid_override); 1136 break; 1137 case NL80211_IFTYPE_AP: 1138 if (!vif->p2p) 1139 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1140 else 1141 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1142 break; 1143 case NL80211_IFTYPE_MONITOR: 1144 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1145 case NL80211_IFTYPE_P2P_DEVICE: 1146 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1147 case NL80211_IFTYPE_ADHOC: 1148 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1149 default: 1150 break; 1151 } 1152 1153 return -EOPNOTSUPP; 1154} 1155 1156int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1157{ 1158 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1159 int ret; 1160 1161 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1162 vif->addr, ieee80211_vif_type_p2p(vif))) 1163 return -EIO; 1164 1165 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1166 true, NULL); 1167 if (ret) 1168 return ret; 1169 1170 /* will only do anything at resume from D3 time */ 1171 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1172 1173 mvmvif->uploaded = true; 1174 return 0; 1175} 1176 1177int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1178 bool force_assoc_off, const u8 *bssid_override) 1179{ 1180 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1181 1182 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1183 vif->addr, ieee80211_vif_type_p2p(vif))) 1184 return -EIO; 1185 1186 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1187 force_assoc_off, bssid_override); 1188} 1189 1190int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1191{ 1192 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1193 struct iwl_mac_ctx_cmd cmd; 1194 int ret; 1195 1196 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1197 vif->addr, ieee80211_vif_type_p2p(vif))) 1198 return -EIO; 1199 1200 memset(&cmd, 0, sizeof(cmd)); 1201 1202 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1203 mvmvif->color)); 1204 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1205 1206 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1207 sizeof(cmd), &cmd); 1208 if (ret) { 1209 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1210 return ret; 1211 } 1212 1213 mvmvif->uploaded = false; 1214 1215 if (vif->type == NL80211_IFTYPE_MONITOR) 1216 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; 1217 1218 return 0; 1219} 1220 1221static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1222 struct ieee80211_vif *csa_vif, u32 gp2) 1223{ 1224 struct iwl_mvm_vif *mvmvif = 1225 iwl_mvm_vif_from_mac80211(csa_vif); 1226 1227 if (!ieee80211_csa_is_complete(csa_vif)) { 1228 int c = ieee80211_csa_update_counter(csa_vif); 1229 1230 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1231 if (csa_vif->p2p && 1232 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2) { 1233 u32 rel_time = (c + 1) * 1234 csa_vif->bss_conf.beacon_int - 1235 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1236 u32 apply_time = gp2 + rel_time * 1024; 1237 1238 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1239 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1240 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1241 apply_time); 1242 } 1243 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1244 /* we don't have CSA NoA scheduled yet, switch now */ 1245 ieee80211_csa_finish(csa_vif); 1246 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1247 } 1248} 1249 1250int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1251 struct iwl_rx_cmd_buffer *rxb, 1252 struct iwl_device_cmd *cmd) 1253{ 1254 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1255 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1256 struct ieee80211_vif *csa_vif; 1257 struct ieee80211_vif *tx_blocked_vif; 1258 u64 tsf; 1259 1260 lockdep_assert_held(&mvm->mutex); 1261 1262 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_CAPA_EXTENDED_BEACON) { 1263 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1264 1265 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1266 tsf = le64_to_cpu(beacon->tsf); 1267 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1268 } else { 1269 struct iwl_beacon_notif *beacon = (void *)pkt->data; 1270 1271 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1272 tsf = le64_to_cpu(beacon->tsf); 1273 } 1274 1275 IWL_DEBUG_RX(mvm, 1276 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1277 le16_to_cpu(beacon_notify_hdr->status.status) & 1278 TX_STATUS_MSK, 1279 beacon_notify_hdr->failure_frame, tsf, 1280 mvm->ap_last_beacon_gp2, 1281 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1282 1283 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1284 lockdep_is_held(&mvm->mutex)); 1285 if (unlikely(csa_vif && csa_vif->csa_active)) 1286 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2); 1287 1288 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1289 lockdep_is_held(&mvm->mutex)); 1290 if (unlikely(tx_blocked_vif)) { 1291 struct iwl_mvm_vif *mvmvif = 1292 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1293 1294 /* 1295 * The channel switch is started and we have blocked the 1296 * stations. If this is the first beacon (the timeout wasn't 1297 * set), set the unblock timeout, otherwise countdown 1298 */ 1299 if (!mvm->csa_tx_block_bcn_timeout) 1300 mvm->csa_tx_block_bcn_timeout = 1301 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1302 else 1303 mvm->csa_tx_block_bcn_timeout--; 1304 1305 /* Check if the timeout is expired, and unblock tx */ 1306 if (mvm->csa_tx_block_bcn_timeout == 0) { 1307 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1308 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1309 } 1310 } 1311 1312 return 0; 1313} 1314 1315static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1316 struct ieee80211_vif *vif) 1317{ 1318 struct iwl_missed_beacons_notif *missed_beacons = _data; 1319 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1320 1321 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1322 return; 1323 1324 /* 1325 * TODO: the threshold should be adjusted based on latency conditions, 1326 * and/or in case of a CS flow on one of the other AP vifs. 1327 */ 1328 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1329 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1330 ieee80211_beacon_loss(vif); 1331} 1332 1333int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1334 struct iwl_rx_cmd_buffer *rxb, 1335 struct iwl_device_cmd *cmd) 1336{ 1337 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1338 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1339 1340 IWL_DEBUG_INFO(mvm, 1341 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1342 le32_to_cpu(mb->mac_id), 1343 le32_to_cpu(mb->consec_missed_beacons), 1344 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1345 le32_to_cpu(mb->num_recvd_beacons), 1346 le32_to_cpu(mb->num_expected_beacons)); 1347 1348 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1349 IEEE80211_IFACE_ITER_NORMAL, 1350 iwl_mvm_beacon_loss_iterator, 1351 mb); 1352 return 0; 1353} 1354