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 - 2015 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <net/mac80211.h> 68 69 #include "mvm.h" 70 #include "sta.h" 71 #include "rs.h" 72 73 /* 74 * New version of ADD_STA_sta command added new fields at the end of the 75 * structure, so sending the size of the relevant API's structure is enough to 76 * support both API versions. 77 */ 78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 79 { 80 return iwl_mvm_has_new_rx_api(mvm) ? 81 sizeof(struct iwl_mvm_add_sta_cmd) : 82 sizeof(struct iwl_mvm_add_sta_cmd_v7); 83 } 84 85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 86 enum nl80211_iftype iftype) 87 { 88 int sta_id; 89 u32 reserved_ids = 0; 90 91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 93 94 lockdep_assert_held(&mvm->mutex); 95 96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 97 if (iftype != NL80211_IFTYPE_STATION) 98 reserved_ids = BIT(0); 99 100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { 102 if (BIT(sta_id) & reserved_ids) 103 continue; 104 105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 106 lockdep_is_held(&mvm->mutex))) 107 return sta_id; 108 } 109 return IWL_MVM_STATION_COUNT; 110 } 111 112 /* send station add/update command to firmware */ 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 114 bool update, unsigned int flags) 115 { 116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 117 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 118 .sta_id = mvm_sta->sta_id, 119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 120 .add_modify = update ? 1 : 0, 121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 122 STA_FLG_MIMO_EN_MSK), 123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 124 }; 125 int ret; 126 u32 status; 127 u32 agg_size = 0, mpdu_dens = 0; 128 129 if (!update || (flags & STA_MODIFY_QUEUES)) { 130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 133 if (flags & STA_MODIFY_QUEUES) 134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 135 } 136 137 switch (sta->bandwidth) { 138 case IEEE80211_STA_RX_BW_160: 139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 140 /* fall through */ 141 case IEEE80211_STA_RX_BW_80: 142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 143 /* fall through */ 144 case IEEE80211_STA_RX_BW_40: 145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 146 /* fall through */ 147 case IEEE80211_STA_RX_BW_20: 148 if (sta->ht_cap.ht_supported) 149 add_sta_cmd.station_flags |= 150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 151 break; 152 } 153 154 switch (sta->rx_nss) { 155 case 1: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 157 break; 158 case 2: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 160 break; 161 case 3 ... 8: 162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 163 break; 164 } 165 166 switch (sta->smps_mode) { 167 case IEEE80211_SMPS_AUTOMATIC: 168 case IEEE80211_SMPS_NUM_MODES: 169 WARN_ON(1); 170 break; 171 case IEEE80211_SMPS_STATIC: 172 /* override NSS */ 173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 175 break; 176 case IEEE80211_SMPS_DYNAMIC: 177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 178 break; 179 case IEEE80211_SMPS_OFF: 180 /* nothing */ 181 break; 182 } 183 184 if (sta->ht_cap.ht_supported) { 185 add_sta_cmd.station_flags_msk |= 186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 187 STA_FLG_AGG_MPDU_DENS_MSK); 188 189 mpdu_dens = sta->ht_cap.ampdu_density; 190 } 191 192 if (sta->vht_cap.vht_supported) { 193 agg_size = sta->vht_cap.cap & 194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 195 agg_size >>= 196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 197 } else if (sta->ht_cap.ht_supported) { 198 agg_size = sta->ht_cap.ampdu_factor; 199 } 200 201 add_sta_cmd.station_flags |= 202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 203 add_sta_cmd.station_flags |= 204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 205 if (mvm_sta->associated) 206 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 207 208 if (sta->wme) { 209 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 210 211 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 212 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK); 213 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 214 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE); 215 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 216 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI); 217 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 218 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO); 219 } 220 221 status = ADD_STA_SUCCESS; 222 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 223 iwl_mvm_add_sta_cmd_size(mvm), 224 &add_sta_cmd, &status); 225 if (ret) 226 return ret; 227 228 switch (status & IWL_ADD_STA_STATUS_MASK) { 229 case ADD_STA_SUCCESS: 230 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 231 break; 232 default: 233 ret = -EIO; 234 IWL_ERR(mvm, "ADD_STA failed\n"); 235 break; 236 } 237 238 return ret; 239 } 240 241 static void iwl_mvm_rx_agg_session_expired(unsigned long data) 242 { 243 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data; 244 struct iwl_mvm_baid_data *ba_data; 245 struct ieee80211_sta *sta; 246 struct iwl_mvm_sta *mvm_sta; 247 unsigned long timeout; 248 249 rcu_read_lock(); 250 251 ba_data = rcu_dereference(*rcu_ptr); 252 253 if (WARN_ON(!ba_data)) 254 goto unlock; 255 256 if (!ba_data->timeout) 257 goto unlock; 258 259 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 260 if (time_is_after_jiffies(timeout)) { 261 mod_timer(&ba_data->session_timer, timeout); 262 goto unlock; 263 } 264 265 /* Timer expired */ 266 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 267 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 268 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif, 269 sta->addr, ba_data->tid); 270 unlock: 271 rcu_read_unlock(); 272 } 273 274 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, 275 struct ieee80211_sta *sta) 276 { 277 unsigned long used_hw_queues; 278 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 279 unsigned int wdg_timeout = 280 iwl_mvm_get_wd_timeout(mvm, NULL, true, false); 281 u32 ac; 282 283 lockdep_assert_held(&mvm->mutex); 284 285 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); 286 287 /* Find available queues, and allocate them to the ACs */ 288 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 289 u8 queue = find_first_zero_bit(&used_hw_queues, 290 mvm->first_agg_queue); 291 292 if (queue >= mvm->first_agg_queue) { 293 IWL_ERR(mvm, "Failed to allocate STA queue\n"); 294 return -EBUSY; 295 } 296 297 __set_bit(queue, &used_hw_queues); 298 mvmsta->hw_queue[ac] = queue; 299 } 300 301 /* Found a place for all queues - enable them */ 302 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 303 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], 304 mvmsta->hw_queue[ac], 305 iwl_mvm_ac_to_tx_fifo[ac], 0, 306 wdg_timeout); 307 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); 308 } 309 310 return 0; 311 } 312 313 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, 314 struct ieee80211_sta *sta) 315 { 316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 317 unsigned long sta_msk; 318 int i; 319 320 lockdep_assert_held(&mvm->mutex); 321 322 /* disable the TDLS STA-specific queues */ 323 sta_msk = mvmsta->tfd_queue_msk; 324 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) 325 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); 326 } 327 328 /* Disable aggregations for a bitmap of TIDs for a given station */ 329 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 330 unsigned long disable_agg_tids, 331 bool remove_queue) 332 { 333 struct iwl_mvm_add_sta_cmd cmd = {}; 334 struct ieee80211_sta *sta; 335 struct iwl_mvm_sta *mvmsta; 336 u32 status; 337 u8 sta_id; 338 int ret; 339 340 spin_lock_bh(&mvm->queue_info_lock); 341 sta_id = mvm->queue_info[queue].ra_sta_id; 342 spin_unlock_bh(&mvm->queue_info_lock); 343 344 rcu_read_lock(); 345 346 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 347 348 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 349 rcu_read_unlock(); 350 return -EINVAL; 351 } 352 353 mvmsta = iwl_mvm_sta_from_mac80211(sta); 354 355 mvmsta->tid_disable_agg |= disable_agg_tids; 356 357 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 358 cmd.sta_id = mvmsta->sta_id; 359 cmd.add_modify = STA_MODE_MODIFY; 360 cmd.modify_mask = STA_MODIFY_QUEUES; 361 if (disable_agg_tids) 362 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 363 if (remove_queue) 364 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 365 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 366 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 367 368 rcu_read_unlock(); 369 370 /* Notify FW of queue removal from the STA queues */ 371 status = ADD_STA_SUCCESS; 372 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 373 iwl_mvm_add_sta_cmd_size(mvm), 374 &cmd, &status); 375 376 return ret; 377 } 378 379 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 380 { 381 struct ieee80211_sta *sta; 382 struct iwl_mvm_sta *mvmsta; 383 unsigned long tid_bitmap; 384 unsigned long agg_tids = 0; 385 s8 sta_id; 386 int tid; 387 388 lockdep_assert_held(&mvm->mutex); 389 390 spin_lock_bh(&mvm->queue_info_lock); 391 sta_id = mvm->queue_info[queue].ra_sta_id; 392 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 393 spin_unlock_bh(&mvm->queue_info_lock); 394 395 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 396 lockdep_is_held(&mvm->mutex)); 397 398 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 399 return -EINVAL; 400 401 mvmsta = iwl_mvm_sta_from_mac80211(sta); 402 403 spin_lock_bh(&mvmsta->lock); 404 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 405 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 406 agg_tids |= BIT(tid); 407 } 408 spin_unlock_bh(&mvmsta->lock); 409 410 return agg_tids; 411 } 412 413 /* 414 * Remove a queue from a station's resources. 415 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 416 * doesn't disable the queue 417 */ 418 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 419 { 420 struct ieee80211_sta *sta; 421 struct iwl_mvm_sta *mvmsta; 422 unsigned long tid_bitmap; 423 unsigned long disable_agg_tids = 0; 424 u8 sta_id; 425 int tid; 426 427 lockdep_assert_held(&mvm->mutex); 428 429 spin_lock_bh(&mvm->queue_info_lock); 430 sta_id = mvm->queue_info[queue].ra_sta_id; 431 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 432 spin_unlock_bh(&mvm->queue_info_lock); 433 434 rcu_read_lock(); 435 436 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 437 438 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 439 rcu_read_unlock(); 440 return 0; 441 } 442 443 mvmsta = iwl_mvm_sta_from_mac80211(sta); 444 445 spin_lock_bh(&mvmsta->lock); 446 /* Unmap MAC queues and TIDs from this queue */ 447 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 448 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 449 disable_agg_tids |= BIT(tid); 450 mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE; 451 } 452 453 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 454 spin_unlock_bh(&mvmsta->lock); 455 456 rcu_read_unlock(); 457 458 return disable_agg_tids; 459 } 460 461 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 462 bool same_sta) 463 { 464 struct iwl_mvm_sta *mvmsta; 465 u8 txq_curr_ac, sta_id, tid; 466 unsigned long disable_agg_tids = 0; 467 int ret; 468 469 lockdep_assert_held(&mvm->mutex); 470 471 spin_lock_bh(&mvm->queue_info_lock); 472 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 473 sta_id = mvm->queue_info[queue].ra_sta_id; 474 tid = mvm->queue_info[queue].txq_tid; 475 spin_unlock_bh(&mvm->queue_info_lock); 476 477 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 478 479 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 480 /* Disable the queue */ 481 if (disable_agg_tids) 482 iwl_mvm_invalidate_sta_queue(mvm, queue, 483 disable_agg_tids, false); 484 485 ret = iwl_mvm_disable_txq(mvm, queue, 486 mvmsta->vif->hw_queue[txq_curr_ac], 487 tid, 0); 488 if (ret) { 489 /* Re-mark the inactive queue as inactive */ 490 spin_lock_bh(&mvm->queue_info_lock); 491 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 492 spin_unlock_bh(&mvm->queue_info_lock); 493 IWL_ERR(mvm, 494 "Failed to free inactive queue %d (ret=%d)\n", 495 queue, ret); 496 497 return ret; 498 } 499 500 /* If TXQ is allocated to another STA, update removal in FW */ 501 if (!same_sta) 502 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 503 504 return 0; 505 } 506 507 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 508 unsigned long tfd_queue_mask, u8 ac) 509 { 510 int queue = 0; 511 u8 ac_to_queue[IEEE80211_NUM_ACS]; 512 int i; 513 514 lockdep_assert_held(&mvm->queue_info_lock); 515 516 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 517 518 /* See what ACs the existing queues for this STA have */ 519 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 520 /* Only DATA queues can be shared */ 521 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 522 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 523 continue; 524 525 /* Don't try and take queues being reconfigured */ 526 if (mvm->queue_info[queue].status == 527 IWL_MVM_QUEUE_RECONFIGURING) 528 continue; 529 530 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 531 } 532 533 /* 534 * The queue to share is chosen only from DATA queues as follows (in 535 * descending priority): 536 * 1. An AC_BE queue 537 * 2. Same AC queue 538 * 3. Highest AC queue that is lower than new AC 539 * 4. Any existing AC (there always is at least 1 DATA queue) 540 */ 541 542 /* Priority 1: An AC_BE queue */ 543 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 544 queue = ac_to_queue[IEEE80211_AC_BE]; 545 /* Priority 2: Same AC queue */ 546 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 547 queue = ac_to_queue[ac]; 548 /* Priority 3a: If new AC is VO and VI exists - use VI */ 549 else if (ac == IEEE80211_AC_VO && 550 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 551 queue = ac_to_queue[IEEE80211_AC_VI]; 552 /* Priority 3b: No BE so only AC less than the new one is BK */ 553 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 554 queue = ac_to_queue[IEEE80211_AC_BK]; 555 /* Priority 4a: No BE nor BK - use VI if exists */ 556 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 557 queue = ac_to_queue[IEEE80211_AC_VI]; 558 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 559 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 560 queue = ac_to_queue[IEEE80211_AC_VO]; 561 562 /* Make sure queue found (or not) is legal */ 563 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 564 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 565 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 566 IWL_ERR(mvm, "No DATA queues available to share\n"); 567 return -ENOSPC; 568 } 569 570 /* Make sure the queue isn't in the middle of being reconfigured */ 571 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 572 IWL_ERR(mvm, 573 "TXQ %d is in the middle of re-config - try again\n", 574 queue); 575 return -EBUSY; 576 } 577 578 return queue; 579 } 580 581 /* 582 * If a given queue has a higher AC than the TID stream that is being compared 583 * to, the queue needs to be redirected to the lower AC. This function does that 584 * in such a case, otherwise - if no redirection required - it does nothing, 585 * unless the %force param is true. 586 */ 587 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 588 int ac, int ssn, unsigned int wdg_timeout, 589 bool force) 590 { 591 struct iwl_scd_txq_cfg_cmd cmd = { 592 .scd_queue = queue, 593 .action = SCD_CFG_DISABLE_QUEUE, 594 }; 595 bool shared_queue; 596 unsigned long mq; 597 int ret; 598 599 /* 600 * If the AC is lower than current one - FIFO needs to be redirected to 601 * the lowest one of the streams in the queue. Check if this is needed 602 * here. 603 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 604 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 605 * we need to check if the numerical value of X is LARGER than of Y. 606 */ 607 spin_lock_bh(&mvm->queue_info_lock); 608 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 609 spin_unlock_bh(&mvm->queue_info_lock); 610 611 IWL_DEBUG_TX_QUEUES(mvm, 612 "No redirection needed on TXQ #%d\n", 613 queue); 614 return 0; 615 } 616 617 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 618 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 619 cmd.tid = mvm->queue_info[queue].txq_tid; 620 mq = mvm->queue_info[queue].hw_queue_to_mac80211; 621 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 622 spin_unlock_bh(&mvm->queue_info_lock); 623 624 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 625 queue, iwl_mvm_ac_to_tx_fifo[ac]); 626 627 /* Stop MAC queues and wait for this queue to empty */ 628 iwl_mvm_stop_mac_queues(mvm, mq); 629 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue)); 630 if (ret) { 631 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 632 queue); 633 ret = -EIO; 634 goto out; 635 } 636 637 /* Before redirecting the queue we need to de-activate it */ 638 iwl_trans_txq_disable(mvm->trans, queue, false); 639 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 640 if (ret) 641 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 642 ret); 643 644 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 645 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 646 647 /* Update the TID "owner" of the queue */ 648 spin_lock_bh(&mvm->queue_info_lock); 649 mvm->queue_info[queue].txq_tid = tid; 650 spin_unlock_bh(&mvm->queue_info_lock); 651 652 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 653 654 /* Redirect to lower AC */ 655 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 656 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, 657 ssn); 658 659 /* Update AC marking of the queue */ 660 spin_lock_bh(&mvm->queue_info_lock); 661 mvm->queue_info[queue].mac80211_ac = ac; 662 spin_unlock_bh(&mvm->queue_info_lock); 663 664 /* 665 * Mark queue as shared in transport if shared 666 * Note this has to be done after queue enablement because enablement 667 * can also set this value, and there is no indication there to shared 668 * queues 669 */ 670 if (shared_queue) 671 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 672 673 out: 674 /* Continue using the MAC queues */ 675 iwl_mvm_start_mac_queues(mvm, mq); 676 677 return ret; 678 } 679 680 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 681 struct ieee80211_sta *sta, u8 ac, int tid, 682 struct ieee80211_hdr *hdr) 683 { 684 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 685 struct iwl_trans_txq_scd_cfg cfg = { 686 .fifo = iwl_mvm_ac_to_tx_fifo[ac], 687 .sta_id = mvmsta->sta_id, 688 .tid = tid, 689 .frame_limit = IWL_FRAME_LIMIT, 690 }; 691 unsigned int wdg_timeout = 692 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 693 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 694 int queue = -1; 695 bool using_inactive_queue = false, same_sta = false; 696 unsigned long disable_agg_tids = 0; 697 enum iwl_mvm_agg_state queue_state; 698 bool shared_queue = false; 699 int ssn; 700 unsigned long tfd_queue_mask; 701 int ret; 702 703 lockdep_assert_held(&mvm->mutex); 704 705 spin_lock_bh(&mvmsta->lock); 706 tfd_queue_mask = mvmsta->tfd_queue_msk; 707 spin_unlock_bh(&mvmsta->lock); 708 709 spin_lock_bh(&mvm->queue_info_lock); 710 711 /* 712 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 713 * exists 714 */ 715 if (!ieee80211_is_data_qos(hdr->frame_control) || 716 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 717 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 718 IWL_MVM_DQA_MIN_MGMT_QUEUE, 719 IWL_MVM_DQA_MAX_MGMT_QUEUE); 720 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 721 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 722 queue); 723 724 /* If no such queue is found, we'll use a DATA queue instead */ 725 } 726 727 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 728 (mvm->queue_info[mvmsta->reserved_queue].status == 729 IWL_MVM_QUEUE_RESERVED || 730 mvm->queue_info[mvmsta->reserved_queue].status == 731 IWL_MVM_QUEUE_INACTIVE)) { 732 queue = mvmsta->reserved_queue; 733 mvm->queue_info[queue].reserved = true; 734 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 735 } 736 737 if (queue < 0) 738 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 739 IWL_MVM_DQA_MIN_DATA_QUEUE, 740 IWL_MVM_DQA_MAX_DATA_QUEUE); 741 742 /* 743 * Check if this queue is already allocated but inactive. 744 * In such a case, we'll need to first free this queue before enabling 745 * it again, so we'll mark it as reserved to make sure no new traffic 746 * arrives on it 747 */ 748 if (queue > 0 && 749 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 750 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 751 using_inactive_queue = true; 752 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 753 IWL_DEBUG_TX_QUEUES(mvm, 754 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 755 queue, mvmsta->sta_id, tid); 756 } 757 758 /* No free queue - we'll have to share */ 759 if (queue <= 0) { 760 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 761 if (queue > 0) { 762 shared_queue = true; 763 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 764 } 765 } 766 767 /* 768 * Mark TXQ as ready, even though it hasn't been fully configured yet, 769 * to make sure no one else takes it. 770 * This will allow avoiding re-acquiring the lock at the end of the 771 * configuration. On error we'll mark it back as free. 772 */ 773 if ((queue > 0) && !shared_queue) 774 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 775 776 spin_unlock_bh(&mvm->queue_info_lock); 777 778 /* This shouldn't happen - out of queues */ 779 if (WARN_ON(queue <= 0)) { 780 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 781 tid, cfg.sta_id); 782 return queue; 783 } 784 785 /* 786 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 787 * but for configuring the SCD to send A-MPDUs we need to mark the queue 788 * as aggregatable. 789 * Mark all DATA queues as allowing to be aggregated at some point 790 */ 791 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 792 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 793 794 /* 795 * If this queue was previously inactive (idle) - we need to free it 796 * first 797 */ 798 if (using_inactive_queue) { 799 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 800 if (ret) 801 return ret; 802 } 803 804 IWL_DEBUG_TX_QUEUES(mvm, 805 "Allocating %squeue #%d to sta %d on tid %d\n", 806 shared_queue ? "shared " : "", queue, 807 mvmsta->sta_id, tid); 808 809 if (shared_queue) { 810 /* Disable any open aggs on this queue */ 811 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 812 813 if (disable_agg_tids) { 814 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 815 queue); 816 iwl_mvm_invalidate_sta_queue(mvm, queue, 817 disable_agg_tids, false); 818 } 819 } 820 821 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 822 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg, 823 wdg_timeout); 824 825 /* 826 * Mark queue as shared in transport if shared 827 * Note this has to be done after queue enablement because enablement 828 * can also set this value, and there is no indication there to shared 829 * queues 830 */ 831 if (shared_queue) 832 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 833 834 spin_lock_bh(&mvmsta->lock); 835 mvmsta->tid_data[tid].txq_id = queue; 836 mvmsta->tid_data[tid].is_tid_active = true; 837 mvmsta->tfd_queue_msk |= BIT(queue); 838 queue_state = mvmsta->tid_data[tid].state; 839 840 if (mvmsta->reserved_queue == queue) 841 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 842 spin_unlock_bh(&mvmsta->lock); 843 844 if (!shared_queue) { 845 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 846 if (ret) 847 goto out_err; 848 849 /* If we need to re-enable aggregations... */ 850 if (queue_state == IWL_AGG_ON) { 851 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 852 if (ret) 853 goto out_err; 854 } 855 } else { 856 /* Redirect queue, if needed */ 857 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 858 wdg_timeout, false); 859 if (ret) 860 goto out_err; 861 } 862 863 return 0; 864 865 out_err: 866 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 867 868 return ret; 869 } 870 871 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 872 { 873 struct iwl_scd_txq_cfg_cmd cmd = { 874 .scd_queue = queue, 875 .action = SCD_CFG_UPDATE_QUEUE_TID, 876 }; 877 int tid; 878 unsigned long tid_bitmap; 879 int ret; 880 881 lockdep_assert_held(&mvm->mutex); 882 883 spin_lock_bh(&mvm->queue_info_lock); 884 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 885 spin_unlock_bh(&mvm->queue_info_lock); 886 887 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 888 return; 889 890 /* Find any TID for queue */ 891 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 892 cmd.tid = tid; 893 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 894 895 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 896 if (ret) { 897 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 898 queue, ret); 899 return; 900 } 901 902 spin_lock_bh(&mvm->queue_info_lock); 903 mvm->queue_info[queue].txq_tid = tid; 904 spin_unlock_bh(&mvm->queue_info_lock); 905 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 906 queue, tid); 907 } 908 909 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 910 { 911 struct ieee80211_sta *sta; 912 struct iwl_mvm_sta *mvmsta; 913 s8 sta_id; 914 int tid = -1; 915 unsigned long tid_bitmap; 916 unsigned int wdg_timeout; 917 int ssn; 918 int ret = true; 919 920 lockdep_assert_held(&mvm->mutex); 921 922 spin_lock_bh(&mvm->queue_info_lock); 923 sta_id = mvm->queue_info[queue].ra_sta_id; 924 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 925 spin_unlock_bh(&mvm->queue_info_lock); 926 927 /* Find TID for queue, and make sure it is the only one on the queue */ 928 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 929 if (tid_bitmap != BIT(tid)) { 930 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 931 queue, tid_bitmap); 932 return; 933 } 934 935 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 936 tid); 937 938 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 939 lockdep_is_held(&mvm->mutex)); 940 941 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 942 return; 943 944 mvmsta = iwl_mvm_sta_from_mac80211(sta); 945 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 946 947 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 948 949 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 950 tid_to_mac80211_ac[tid], ssn, 951 wdg_timeout, true); 952 if (ret) { 953 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 954 return; 955 } 956 957 /* If aggs should be turned back on - do it */ 958 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 959 struct iwl_mvm_add_sta_cmd cmd = {0}; 960 961 mvmsta->tid_disable_agg &= ~BIT(tid); 962 963 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 964 cmd.sta_id = mvmsta->sta_id; 965 cmd.add_modify = STA_MODE_MODIFY; 966 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 967 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 968 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 969 970 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 971 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 972 if (!ret) { 973 IWL_DEBUG_TX_QUEUES(mvm, 974 "TXQ #%d is now aggregated again\n", 975 queue); 976 977 /* Mark queue intenally as aggregating again */ 978 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 979 } 980 } 981 982 spin_lock_bh(&mvm->queue_info_lock); 983 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 984 spin_unlock_bh(&mvm->queue_info_lock); 985 } 986 987 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 988 { 989 if (tid == IWL_MAX_TID_COUNT) 990 return IEEE80211_AC_VO; /* MGMT */ 991 992 return tid_to_mac80211_ac[tid]; 993 } 994 995 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 996 struct ieee80211_sta *sta, int tid) 997 { 998 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 999 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1000 struct sk_buff *skb; 1001 struct ieee80211_hdr *hdr; 1002 struct sk_buff_head deferred_tx; 1003 u8 mac_queue; 1004 bool no_queue = false; /* Marks if there is a problem with the queue */ 1005 u8 ac; 1006 1007 lockdep_assert_held(&mvm->mutex); 1008 1009 skb = skb_peek(&tid_data->deferred_tx_frames); 1010 if (!skb) 1011 return; 1012 hdr = (void *)skb->data; 1013 1014 ac = iwl_mvm_tid_to_ac_queue(tid); 1015 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1016 1017 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE && 1018 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1019 IWL_ERR(mvm, 1020 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1021 mvmsta->sta_id, tid); 1022 1023 /* 1024 * Mark queue as problematic so later the deferred traffic is 1025 * freed, as we can do nothing with it 1026 */ 1027 no_queue = true; 1028 } 1029 1030 __skb_queue_head_init(&deferred_tx); 1031 1032 /* Disable bottom-halves when entering TX path */ 1033 local_bh_disable(); 1034 spin_lock(&mvmsta->lock); 1035 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1036 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1037 spin_unlock(&mvmsta->lock); 1038 1039 while ((skb = __skb_dequeue(&deferred_tx))) 1040 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1041 ieee80211_free_txskb(mvm->hw, skb); 1042 local_bh_enable(); 1043 1044 /* Wake queue */ 1045 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1046 } 1047 1048 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1049 { 1050 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1051 add_stream_wk); 1052 struct ieee80211_sta *sta; 1053 struct iwl_mvm_sta *mvmsta; 1054 unsigned long deferred_tid_traffic; 1055 int queue, sta_id, tid; 1056 1057 /* Check inactivity of queues */ 1058 iwl_mvm_inactivity_check(mvm); 1059 1060 mutex_lock(&mvm->mutex); 1061 1062 /* Reconfigure queues requiring reconfiguation */ 1063 for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) { 1064 bool reconfig; 1065 bool change_owner; 1066 1067 spin_lock_bh(&mvm->queue_info_lock); 1068 reconfig = (mvm->queue_info[queue].status == 1069 IWL_MVM_QUEUE_RECONFIGURING); 1070 1071 /* 1072 * We need to take into account a situation in which a TXQ was 1073 * allocated to TID x, and then turned shared by adding TIDs y 1074 * and z. If TID x becomes inactive and is removed from the TXQ, 1075 * ownership must be given to one of the remaining TIDs. 1076 * This is mainly because if TID x continues - a new queue can't 1077 * be allocated for it as long as it is an owner of another TXQ. 1078 */ 1079 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1080 BIT(mvm->queue_info[queue].txq_tid)) && 1081 (mvm->queue_info[queue].status == 1082 IWL_MVM_QUEUE_SHARED); 1083 spin_unlock_bh(&mvm->queue_info_lock); 1084 1085 if (reconfig) 1086 iwl_mvm_unshare_queue(mvm, queue); 1087 else if (change_owner) 1088 iwl_mvm_change_queue_owner(mvm, queue); 1089 } 1090 1091 /* Go over all stations with deferred traffic */ 1092 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1093 IWL_MVM_STATION_COUNT) { 1094 clear_bit(sta_id, mvm->sta_deferred_frames); 1095 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1096 lockdep_is_held(&mvm->mutex)); 1097 if (IS_ERR_OR_NULL(sta)) 1098 continue; 1099 1100 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1101 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1102 1103 for_each_set_bit(tid, &deferred_tid_traffic, 1104 IWL_MAX_TID_COUNT + 1) 1105 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1106 } 1107 1108 mutex_unlock(&mvm->mutex); 1109 } 1110 1111 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1112 struct ieee80211_sta *sta, 1113 enum nl80211_iftype vif_type) 1114 { 1115 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1116 int queue; 1117 bool using_inactive_queue = false, same_sta = false; 1118 1119 /* 1120 * Check for inactive queues, so we don't reach a situation where we 1121 * can't add a STA due to a shortage in queues that doesn't really exist 1122 */ 1123 iwl_mvm_inactivity_check(mvm); 1124 1125 spin_lock_bh(&mvm->queue_info_lock); 1126 1127 /* Make sure we have free resources for this STA */ 1128 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1129 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1130 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1131 IWL_MVM_QUEUE_FREE)) 1132 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1133 else 1134 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1135 IWL_MVM_DQA_MIN_DATA_QUEUE, 1136 IWL_MVM_DQA_MAX_DATA_QUEUE); 1137 if (queue < 0) { 1138 spin_unlock_bh(&mvm->queue_info_lock); 1139 IWL_ERR(mvm, "No available queues for new station\n"); 1140 return -ENOSPC; 1141 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 1142 /* 1143 * If this queue is already allocated but inactive we'll need to 1144 * first free this queue before enabling it again, we'll mark 1145 * it as reserved to make sure no new traffic arrives on it 1146 */ 1147 using_inactive_queue = true; 1148 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 1149 } 1150 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1151 1152 spin_unlock_bh(&mvm->queue_info_lock); 1153 1154 mvmsta->reserved_queue = queue; 1155 1156 if (using_inactive_queue) 1157 iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 1158 1159 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1160 queue, mvmsta->sta_id); 1161 1162 return 0; 1163 } 1164 1165 /* 1166 * In DQA mode, after a HW restart the queues should be allocated as before, in 1167 * order to avoid race conditions when there are shared queues. This function 1168 * does the re-mapping and queue allocation. 1169 * 1170 * Note that re-enabling aggregations isn't done in this function. 1171 */ 1172 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1173 struct iwl_mvm_sta *mvm_sta) 1174 { 1175 unsigned int wdg_timeout = 1176 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1177 int i; 1178 struct iwl_trans_txq_scd_cfg cfg = { 1179 .sta_id = mvm_sta->sta_id, 1180 .frame_limit = IWL_FRAME_LIMIT, 1181 }; 1182 1183 /* Make sure reserved queue is still marked as such (if allocated) */ 1184 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1185 mvm->queue_info[mvm_sta->reserved_queue].status = 1186 IWL_MVM_QUEUE_RESERVED; 1187 1188 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1189 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1190 int txq_id = tid_data->txq_id; 1191 int ac; 1192 u8 mac_queue; 1193 1194 if (txq_id == IEEE80211_INVAL_HW_QUEUE) 1195 continue; 1196 1197 skb_queue_head_init(&tid_data->deferred_tx_frames); 1198 1199 ac = tid_to_mac80211_ac[i]; 1200 mac_queue = mvm_sta->vif->hw_queue[ac]; 1201 1202 cfg.tid = i; 1203 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac]; 1204 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1205 txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1206 1207 IWL_DEBUG_TX_QUEUES(mvm, 1208 "Re-mapping sta %d tid %d to queue %d\n", 1209 mvm_sta->sta_id, i, txq_id); 1210 1211 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, 1212 IEEE80211_SEQ_TO_SN(tid_data->seq_number), 1213 &cfg, wdg_timeout); 1214 1215 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1216 } 1217 1218 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0); 1219 } 1220 1221 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1222 struct ieee80211_vif *vif, 1223 struct ieee80211_sta *sta) 1224 { 1225 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1226 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1227 struct iwl_mvm_rxq_dup_data *dup_data; 1228 int i, ret, sta_id; 1229 1230 lockdep_assert_held(&mvm->mutex); 1231 1232 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1233 sta_id = iwl_mvm_find_free_sta_id(mvm, 1234 ieee80211_vif_type_p2p(vif)); 1235 else 1236 sta_id = mvm_sta->sta_id; 1237 1238 if (sta_id == IWL_MVM_STATION_COUNT) 1239 return -ENOSPC; 1240 1241 spin_lock_init(&mvm_sta->lock); 1242 1243 /* In DQA mode, if this is a HW restart, re-alloc existing queues */ 1244 if (iwl_mvm_is_dqa_supported(mvm) && 1245 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1246 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1247 goto update_fw; 1248 } 1249 1250 mvm_sta->sta_id = sta_id; 1251 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1252 mvmvif->color); 1253 mvm_sta->vif = vif; 1254 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1255 mvm_sta->tx_protection = 0; 1256 mvm_sta->tt_tx_protection = false; 1257 1258 /* HW restart, don't assume the memory has been zeroed */ 1259 atomic_set(&mvm->pending_frames[sta_id], 0); 1260 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1261 mvm_sta->tfd_queue_msk = 0; 1262 1263 /* 1264 * Allocate new queues for a TDLS station, unless we're in DQA mode, 1265 * and then they'll be allocated dynamically 1266 */ 1267 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) { 1268 ret = iwl_mvm_tdls_sta_init(mvm, sta); 1269 if (ret) 1270 return ret; 1271 } else if (!iwl_mvm_is_dqa_supported(mvm)) { 1272 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1273 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 1274 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); 1275 } 1276 1277 /* for HW restart - reset everything but the sequence number */ 1278 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1279 u16 seq = mvm_sta->tid_data[i].seq_number; 1280 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1281 mvm_sta->tid_data[i].seq_number = seq; 1282 1283 if (!iwl_mvm_is_dqa_supported(mvm)) 1284 continue; 1285 1286 /* 1287 * Mark all queues for this STA as unallocated and defer TX 1288 * frames until the queue is allocated 1289 */ 1290 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; 1291 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1292 } 1293 mvm_sta->deferred_traffic_tid_map = 0; 1294 mvm_sta->agg_tids = 0; 1295 1296 if (iwl_mvm_has_new_rx_api(mvm) && 1297 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1298 dup_data = kcalloc(mvm->trans->num_rx_queues, 1299 sizeof(*dup_data), 1300 GFP_KERNEL); 1301 if (!dup_data) 1302 return -ENOMEM; 1303 mvm_sta->dup_data = dup_data; 1304 } 1305 1306 if (iwl_mvm_is_dqa_supported(mvm)) { 1307 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1308 ieee80211_vif_type_p2p(vif)); 1309 if (ret) 1310 goto err; 1311 } 1312 1313 update_fw: 1314 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0); 1315 if (ret) 1316 goto err; 1317 1318 if (vif->type == NL80211_IFTYPE_STATION) { 1319 if (!sta->tdls) { 1320 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); 1321 mvmvif->ap_sta_id = sta_id; 1322 } else { 1323 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); 1324 } 1325 } 1326 1327 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1328 1329 return 0; 1330 1331 err: 1332 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1333 iwl_mvm_tdls_sta_deinit(mvm, sta); 1334 return ret; 1335 } 1336 1337 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1338 bool drain) 1339 { 1340 struct iwl_mvm_add_sta_cmd cmd = {}; 1341 int ret; 1342 u32 status; 1343 1344 lockdep_assert_held(&mvm->mutex); 1345 1346 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1347 cmd.sta_id = mvmsta->sta_id; 1348 cmd.add_modify = STA_MODE_MODIFY; 1349 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1350 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1351 1352 status = ADD_STA_SUCCESS; 1353 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1354 iwl_mvm_add_sta_cmd_size(mvm), 1355 &cmd, &status); 1356 if (ret) 1357 return ret; 1358 1359 switch (status & IWL_ADD_STA_STATUS_MASK) { 1360 case ADD_STA_SUCCESS: 1361 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1362 mvmsta->sta_id); 1363 break; 1364 default: 1365 ret = -EIO; 1366 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1367 mvmsta->sta_id); 1368 break; 1369 } 1370 1371 return ret; 1372 } 1373 1374 /* 1375 * Remove a station from the FW table. Before sending the command to remove 1376 * the station validate that the station is indeed known to the driver (sanity 1377 * only). 1378 */ 1379 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1380 { 1381 struct ieee80211_sta *sta; 1382 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1383 .sta_id = sta_id, 1384 }; 1385 int ret; 1386 1387 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1388 lockdep_is_held(&mvm->mutex)); 1389 1390 /* Note: internal stations are marked as error values */ 1391 if (!sta) { 1392 IWL_ERR(mvm, "Invalid station id\n"); 1393 return -EINVAL; 1394 } 1395 1396 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1397 sizeof(rm_sta_cmd), &rm_sta_cmd); 1398 if (ret) { 1399 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1400 return ret; 1401 } 1402 1403 return 0; 1404 } 1405 1406 void iwl_mvm_sta_drained_wk(struct work_struct *wk) 1407 { 1408 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); 1409 u8 sta_id; 1410 1411 /* 1412 * The mutex is needed because of the SYNC cmd, but not only: if the 1413 * work would run concurrently with iwl_mvm_rm_sta, it would run before 1414 * iwl_mvm_rm_sta sets the station as busy, and exit. Then 1415 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean 1416 * that later. 1417 */ 1418 mutex_lock(&mvm->mutex); 1419 1420 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { 1421 int ret; 1422 struct ieee80211_sta *sta = 1423 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1424 lockdep_is_held(&mvm->mutex)); 1425 1426 /* 1427 * This station is in use or RCU-removed; the latter happens in 1428 * managed mode, where mac80211 removes the station before we 1429 * can remove it from firmware (we can only do that after the 1430 * MAC is marked unassociated), and possibly while the deauth 1431 * frame to disconnect from the AP is still queued. Then, the 1432 * station pointer is -ENOENT when the last skb is reclaimed. 1433 */ 1434 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) 1435 continue; 1436 1437 if (PTR_ERR(sta) == -EINVAL) { 1438 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", 1439 sta_id); 1440 continue; 1441 } 1442 1443 if (!sta) { 1444 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", 1445 sta_id); 1446 continue; 1447 } 1448 1449 WARN_ON(PTR_ERR(sta) != -EBUSY); 1450 /* This station was removed and we waited until it got drained, 1451 * we can now proceed and remove it. 1452 */ 1453 ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1454 if (ret) { 1455 IWL_ERR(mvm, 1456 "Couldn't remove sta %d after it was drained\n", 1457 sta_id); 1458 continue; 1459 } 1460 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1461 clear_bit(sta_id, mvm->sta_drained); 1462 1463 if (mvm->tfd_drained[sta_id]) { 1464 unsigned long i, msk = mvm->tfd_drained[sta_id]; 1465 1466 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) 1467 iwl_mvm_disable_txq(mvm, i, i, 1468 IWL_MAX_TID_COUNT, 0); 1469 1470 mvm->tfd_drained[sta_id] = 0; 1471 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", 1472 sta_id, msk); 1473 } 1474 } 1475 1476 mutex_unlock(&mvm->mutex); 1477 } 1478 1479 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1480 struct ieee80211_vif *vif, 1481 struct iwl_mvm_sta *mvm_sta) 1482 { 1483 int ac; 1484 int i; 1485 1486 lockdep_assert_held(&mvm->mutex); 1487 1488 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1489 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE) 1490 continue; 1491 1492 ac = iwl_mvm_tid_to_ac_queue(i); 1493 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1494 vif->hw_queue[ac], i, 0); 1495 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; 1496 } 1497 } 1498 1499 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1500 struct ieee80211_vif *vif, 1501 struct ieee80211_sta *sta) 1502 { 1503 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1504 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1505 u8 sta_id = mvm_sta->sta_id; 1506 int ret; 1507 1508 lockdep_assert_held(&mvm->mutex); 1509 1510 if (iwl_mvm_has_new_rx_api(mvm)) 1511 kfree(mvm_sta->dup_data); 1512 1513 if ((vif->type == NL80211_IFTYPE_STATION && 1514 mvmvif->ap_sta_id == sta_id) || 1515 iwl_mvm_is_dqa_supported(mvm)){ 1516 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1517 if (ret) 1518 return ret; 1519 /* flush its queues here since we are freeing mvm_sta */ 1520 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); 1521 if (ret) 1522 return ret; 1523 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 1524 mvm_sta->tfd_queue_msk); 1525 if (ret) 1526 return ret; 1527 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1528 1529 /* If DQA is supported - the queues can be disabled now */ 1530 if (iwl_mvm_is_dqa_supported(mvm)) { 1531 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1532 /* 1533 * If pending_frames is set at this point - it must be 1534 * driver internal logic error, since queues are empty 1535 * and removed successuly. 1536 * warn on it but set it to 0 anyway to avoid station 1537 * not being removed later in the function 1538 */ 1539 WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0)); 1540 } 1541 1542 /* If there is a TXQ still marked as reserved - free it */ 1543 if (iwl_mvm_is_dqa_supported(mvm) && 1544 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1545 u8 reserved_txq = mvm_sta->reserved_queue; 1546 enum iwl_mvm_queue_status *status; 1547 1548 /* 1549 * If no traffic has gone through the reserved TXQ - it 1550 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1551 * should be manually marked as free again 1552 */ 1553 spin_lock_bh(&mvm->queue_info_lock); 1554 status = &mvm->queue_info[reserved_txq].status; 1555 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1556 (*status != IWL_MVM_QUEUE_FREE), 1557 "sta_id %d reserved txq %d status %d", 1558 sta_id, reserved_txq, *status)) { 1559 spin_unlock_bh(&mvm->queue_info_lock); 1560 return -EINVAL; 1561 } 1562 1563 *status = IWL_MVM_QUEUE_FREE; 1564 spin_unlock_bh(&mvm->queue_info_lock); 1565 } 1566 1567 if (vif->type == NL80211_IFTYPE_STATION && 1568 mvmvif->ap_sta_id == sta_id) { 1569 /* if associated - we can't remove the AP STA now */ 1570 if (vif->bss_conf.assoc) 1571 return ret; 1572 1573 /* unassoc - go ahead - remove the AP STA now */ 1574 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 1575 1576 /* clear d0i3_ap_sta_id if no longer relevant */ 1577 if (mvm->d0i3_ap_sta_id == sta_id) 1578 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; 1579 } 1580 } 1581 1582 /* 1583 * This shouldn't happen - the TDLS channel switch should be canceled 1584 * before the STA is removed. 1585 */ 1586 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1587 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; 1588 cancel_delayed_work(&mvm->tdls_cs.dwork); 1589 } 1590 1591 /* 1592 * Make sure that the tx response code sees the station as -EBUSY and 1593 * calls the drain worker. 1594 */ 1595 spin_lock_bh(&mvm_sta->lock); 1596 1597 /* 1598 * There are frames pending on the AC queues for this station. 1599 * We need to wait until all the frames are drained... 1600 */ 1601 if (atomic_read(&mvm->pending_frames[sta_id])) { 1602 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], 1603 ERR_PTR(-EBUSY)); 1604 spin_unlock_bh(&mvm_sta->lock); 1605 1606 /* disable TDLS sta queues on drain complete */ 1607 if (sta->tdls) { 1608 mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk; 1609 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id); 1610 } 1611 1612 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1613 } else { 1614 spin_unlock_bh(&mvm_sta->lock); 1615 1616 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1617 iwl_mvm_tdls_sta_deinit(mvm, sta); 1618 1619 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1620 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1621 } 1622 1623 return ret; 1624 } 1625 1626 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1627 struct ieee80211_vif *vif, 1628 u8 sta_id) 1629 { 1630 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1631 1632 lockdep_assert_held(&mvm->mutex); 1633 1634 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1635 return ret; 1636 } 1637 1638 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1639 struct iwl_mvm_int_sta *sta, 1640 u32 qmask, enum nl80211_iftype iftype) 1641 { 1642 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1643 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1644 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) 1645 return -ENOSPC; 1646 } 1647 1648 sta->tfd_queue_msk = qmask; 1649 1650 /* put a non-NULL value so iterating over the stations won't stop */ 1651 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1652 return 0; 1653 } 1654 1655 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, 1656 struct iwl_mvm_int_sta *sta) 1657 { 1658 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1659 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1660 sta->sta_id = IWL_MVM_STATION_COUNT; 1661 } 1662 1663 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1664 struct iwl_mvm_int_sta *sta, 1665 const u8 *addr, 1666 u16 mac_id, u16 color) 1667 { 1668 struct iwl_mvm_add_sta_cmd cmd; 1669 int ret; 1670 u32 status; 1671 1672 lockdep_assert_held(&mvm->mutex); 1673 1674 memset(&cmd, 0, sizeof(cmd)); 1675 cmd.sta_id = sta->sta_id; 1676 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1677 color)); 1678 1679 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1680 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1681 1682 if (addr) 1683 memcpy(cmd.addr, addr, ETH_ALEN); 1684 1685 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1686 iwl_mvm_add_sta_cmd_size(mvm), 1687 &cmd, &status); 1688 if (ret) 1689 return ret; 1690 1691 switch (status & IWL_ADD_STA_STATUS_MASK) { 1692 case ADD_STA_SUCCESS: 1693 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1694 return 0; 1695 default: 1696 ret = -EIO; 1697 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1698 status); 1699 break; 1700 } 1701 return ret; 1702 } 1703 1704 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1705 { 1706 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1707 mvm->cfg->base_params->wd_timeout : 1708 IWL_WATCHDOG_DISABLED; 1709 int ret; 1710 1711 lockdep_assert_held(&mvm->mutex); 1712 1713 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1714 if (!iwl_mvm_is_dqa_supported(mvm)) 1715 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, 1716 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 1717 1718 /* Allocate aux station and assign to it the aux queue */ 1719 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1720 NL80211_IFTYPE_UNSPECIFIED); 1721 if (ret) 1722 return ret; 1723 1724 if (iwl_mvm_is_dqa_supported(mvm)) { 1725 struct iwl_trans_txq_scd_cfg cfg = { 1726 .fifo = IWL_MVM_TX_FIFO_MCAST, 1727 .sta_id = mvm->aux_sta.sta_id, 1728 .tid = IWL_MAX_TID_COUNT, 1729 .aggregate = false, 1730 .frame_limit = IWL_FRAME_LIMIT, 1731 }; 1732 1733 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg, 1734 wdg_timeout); 1735 } 1736 1737 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1738 MAC_INDEX_AUX, 0); 1739 1740 if (ret) 1741 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1742 return ret; 1743 } 1744 1745 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1746 { 1747 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1748 1749 lockdep_assert_held(&mvm->mutex); 1750 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1751 mvmvif->id, 0); 1752 } 1753 1754 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1755 { 1756 int ret; 1757 1758 lockdep_assert_held(&mvm->mutex); 1759 1760 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1761 if (ret) 1762 IWL_WARN(mvm, "Failed sending remove station\n"); 1763 1764 return ret; 1765 } 1766 1767 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1768 { 1769 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1770 } 1771 1772 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1773 { 1774 lockdep_assert_held(&mvm->mutex); 1775 1776 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1777 } 1778 1779 /* 1780 * Send the add station command for the vif's broadcast station. 1781 * Assumes that the station was already allocated. 1782 * 1783 * @mvm: the mvm component 1784 * @vif: the interface to which the broadcast station is added 1785 * @bsta: the broadcast station to add. 1786 */ 1787 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1788 { 1789 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1790 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1791 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1792 const u8 *baddr = _baddr; 1793 int ret; 1794 1795 lockdep_assert_held(&mvm->mutex); 1796 1797 if (iwl_mvm_is_dqa_supported(mvm)) { 1798 struct iwl_trans_txq_scd_cfg cfg = { 1799 .fifo = IWL_MVM_TX_FIFO_VO, 1800 .sta_id = mvmvif->bcast_sta.sta_id, 1801 .tid = IWL_MAX_TID_COUNT, 1802 .aggregate = false, 1803 .frame_limit = IWL_FRAME_LIMIT, 1804 }; 1805 unsigned int wdg_timeout = 1806 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1807 int queue; 1808 1809 if (vif->type == NL80211_IFTYPE_AP) 1810 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 1811 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1812 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE; 1813 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 1814 return -EINVAL; 1815 1816 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg, 1817 wdg_timeout); 1818 bsta->tfd_queue_msk |= BIT(queue); 1819 } 1820 1821 if (vif->type == NL80211_IFTYPE_ADHOC) 1822 baddr = vif->bss_conf.bssid; 1823 1824 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) 1825 return -ENOSPC; 1826 1827 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1828 mvmvif->id, mvmvif->color); 1829 if (ret) 1830 return ret; 1831 1832 /* 1833 * In AP vif type, we also need to enable the cab_queue. However, we 1834 * have to enable it after the ADD_STA command is sent, otherwise the 1835 * FW will throw an assert once we send the ADD_STA command (it'll 1836 * detect a mismatch in the tfd_queue_msk, as we can't add the 1837 * enabled-cab_queue to the mask) 1838 */ 1839 if (iwl_mvm_is_dqa_supported(mvm) && 1840 vif->type == NL80211_IFTYPE_AP) { 1841 struct iwl_trans_txq_scd_cfg cfg = { 1842 .fifo = IWL_MVM_TX_FIFO_MCAST, 1843 .sta_id = mvmvif->bcast_sta.sta_id, 1844 .tid = IWL_MAX_TID_COUNT, 1845 .aggregate = false, 1846 .frame_limit = IWL_FRAME_LIMIT, 1847 }; 1848 unsigned int wdg_timeout = 1849 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1850 1851 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 1852 0, &cfg, wdg_timeout); 1853 } 1854 1855 return 0; 1856 } 1857 1858 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 1859 struct ieee80211_vif *vif) 1860 { 1861 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1862 1863 lockdep_assert_held(&mvm->mutex); 1864 1865 if (vif->type == NL80211_IFTYPE_AP) 1866 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, 1867 IWL_MAX_TID_COUNT, 0); 1868 1869 if (mvmvif->bcast_sta.tfd_queue_msk & 1870 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)) { 1871 iwl_mvm_disable_txq(mvm, 1872 IWL_MVM_DQA_AP_PROBE_RESP_QUEUE, 1873 vif->hw_queue[0], IWL_MAX_TID_COUNT, 1874 0); 1875 mvmvif->bcast_sta.tfd_queue_msk &= 1876 ~BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE); 1877 } 1878 1879 if (mvmvif->bcast_sta.tfd_queue_msk & 1880 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)) { 1881 iwl_mvm_disable_txq(mvm, 1882 IWL_MVM_DQA_P2P_DEVICE_QUEUE, 1883 vif->hw_queue[0], IWL_MAX_TID_COUNT, 1884 0); 1885 mvmvif->bcast_sta.tfd_queue_msk &= 1886 ~BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE); 1887 } 1888 } 1889 1890 /* Send the FW a request to remove the station from it's internal data 1891 * structures, but DO NOT remove the entry from the local data structures. */ 1892 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1893 { 1894 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1895 int ret; 1896 1897 lockdep_assert_held(&mvm->mutex); 1898 1899 if (iwl_mvm_is_dqa_supported(mvm)) 1900 iwl_mvm_free_bcast_sta_queues(mvm, vif); 1901 1902 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1903 if (ret) 1904 IWL_WARN(mvm, "Failed sending remove station\n"); 1905 return ret; 1906 } 1907 1908 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1909 { 1910 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1911 u32 qmask = 0; 1912 1913 lockdep_assert_held(&mvm->mutex); 1914 1915 if (!iwl_mvm_is_dqa_supported(mvm)) { 1916 qmask = iwl_mvm_mac_get_queues_mask(vif); 1917 1918 /* 1919 * The firmware defines the TFD queue mask to only be relevant 1920 * for *unicast* queues, so the multicast (CAB) queue shouldn't 1921 * be included. This only happens in NL80211_IFTYPE_AP vif type, 1922 * so the next line will only have an effect there. 1923 */ 1924 qmask &= ~BIT(vif->cab_queue); 1925 } 1926 1927 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, 1928 ieee80211_vif_type_p2p(vif)); 1929 } 1930 1931 /* Allocate a new station entry for the broadcast station to the given vif, 1932 * and send it to the FW. 1933 * Note that each P2P mac should have its own broadcast station. 1934 * 1935 * @mvm: the mvm component 1936 * @vif: the interface to which the broadcast station is added 1937 * @bsta: the broadcast station to add. */ 1938 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1939 { 1940 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1941 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1942 int ret; 1943 1944 lockdep_assert_held(&mvm->mutex); 1945 1946 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1947 if (ret) 1948 return ret; 1949 1950 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 1951 1952 if (ret) 1953 iwl_mvm_dealloc_int_sta(mvm, bsta); 1954 1955 return ret; 1956 } 1957 1958 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1959 { 1960 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1961 1962 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 1963 } 1964 1965 /* 1966 * Send the FW a request to remove the station from it's internal data 1967 * structures, and in addition remove it from the local data structure. 1968 */ 1969 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1970 { 1971 int ret; 1972 1973 lockdep_assert_held(&mvm->mutex); 1974 1975 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 1976 1977 iwl_mvm_dealloc_bcast_sta(mvm, vif); 1978 1979 return ret; 1980 } 1981 1982 #define IWL_MAX_RX_BA_SESSIONS 16 1983 1984 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 1985 { 1986 struct iwl_mvm_delba_notif notif = { 1987 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 1988 .metadata.sync = 1, 1989 .delba.baid = baid, 1990 }; 1991 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 1992 }; 1993 1994 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 1995 struct iwl_mvm_baid_data *data) 1996 { 1997 int i; 1998 1999 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2000 2001 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2002 int j; 2003 struct iwl_mvm_reorder_buffer *reorder_buf = 2004 &data->reorder_buf[i]; 2005 2006 spin_lock_bh(&reorder_buf->lock); 2007 if (likely(!reorder_buf->num_stored)) { 2008 spin_unlock_bh(&reorder_buf->lock); 2009 continue; 2010 } 2011 2012 /* 2013 * This shouldn't happen in regular DELBA since the internal 2014 * delBA notification should trigger a release of all frames in 2015 * the reorder buffer. 2016 */ 2017 WARN_ON(1); 2018 2019 for (j = 0; j < reorder_buf->buf_size; j++) 2020 __skb_queue_purge(&reorder_buf->entries[j]); 2021 /* 2022 * Prevent timer re-arm. This prevents a very far fetched case 2023 * where we timed out on the notification. There may be prior 2024 * RX frames pending in the RX queue before the notification 2025 * that might get processed between now and the actual deletion 2026 * and we would re-arm the timer although we are deleting the 2027 * reorder buffer. 2028 */ 2029 reorder_buf->removed = true; 2030 spin_unlock_bh(&reorder_buf->lock); 2031 del_timer_sync(&reorder_buf->reorder_timer); 2032 } 2033 } 2034 2035 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2036 u32 sta_id, 2037 struct iwl_mvm_baid_data *data, 2038 u16 ssn, u8 buf_size) 2039 { 2040 int i; 2041 2042 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2043 struct iwl_mvm_reorder_buffer *reorder_buf = 2044 &data->reorder_buf[i]; 2045 int j; 2046 2047 reorder_buf->num_stored = 0; 2048 reorder_buf->head_sn = ssn; 2049 reorder_buf->buf_size = buf_size; 2050 /* rx reorder timer */ 2051 reorder_buf->reorder_timer.function = 2052 iwl_mvm_reorder_timer_expired; 2053 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 2054 init_timer(&reorder_buf->reorder_timer); 2055 spin_lock_init(&reorder_buf->lock); 2056 reorder_buf->mvm = mvm; 2057 reorder_buf->queue = i; 2058 reorder_buf->sta_id = sta_id; 2059 for (j = 0; j < reorder_buf->buf_size; j++) 2060 __skb_queue_head_init(&reorder_buf->entries[j]); 2061 } 2062 } 2063 2064 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2065 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2066 { 2067 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2068 struct iwl_mvm_add_sta_cmd cmd = {}; 2069 struct iwl_mvm_baid_data *baid_data = NULL; 2070 int ret; 2071 u32 status; 2072 2073 lockdep_assert_held(&mvm->mutex); 2074 2075 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2076 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2077 return -ENOSPC; 2078 } 2079 2080 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2081 /* 2082 * Allocate here so if allocation fails we can bail out early 2083 * before starting the BA session in the firmware 2084 */ 2085 baid_data = kzalloc(sizeof(*baid_data) + 2086 mvm->trans->num_rx_queues * 2087 sizeof(baid_data->reorder_buf[0]), 2088 GFP_KERNEL); 2089 if (!baid_data) 2090 return -ENOMEM; 2091 } 2092 2093 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2094 cmd.sta_id = mvm_sta->sta_id; 2095 cmd.add_modify = STA_MODE_MODIFY; 2096 if (start) { 2097 cmd.add_immediate_ba_tid = (u8) tid; 2098 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2099 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2100 } else { 2101 cmd.remove_immediate_ba_tid = (u8) tid; 2102 } 2103 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2104 STA_MODIFY_REMOVE_BA_TID; 2105 2106 status = ADD_STA_SUCCESS; 2107 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2108 iwl_mvm_add_sta_cmd_size(mvm), 2109 &cmd, &status); 2110 if (ret) 2111 goto out_free; 2112 2113 switch (status & IWL_ADD_STA_STATUS_MASK) { 2114 case ADD_STA_SUCCESS: 2115 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2116 start ? "start" : "stopp"); 2117 break; 2118 case ADD_STA_IMMEDIATE_BA_FAILURE: 2119 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2120 ret = -ENOSPC; 2121 break; 2122 default: 2123 ret = -EIO; 2124 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2125 start ? "start" : "stopp", status); 2126 break; 2127 } 2128 2129 if (ret) 2130 goto out_free; 2131 2132 if (start) { 2133 u8 baid; 2134 2135 mvm->rx_ba_sessions++; 2136 2137 if (!iwl_mvm_has_new_rx_api(mvm)) 2138 return 0; 2139 2140 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2141 ret = -EINVAL; 2142 goto out_free; 2143 } 2144 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2145 IWL_ADD_STA_BAID_SHIFT); 2146 baid_data->baid = baid; 2147 baid_data->timeout = timeout; 2148 baid_data->last_rx = jiffies; 2149 setup_timer(&baid_data->session_timer, 2150 iwl_mvm_rx_agg_session_expired, 2151 (unsigned long)&mvm->baid_map[baid]); 2152 baid_data->mvm = mvm; 2153 baid_data->tid = tid; 2154 baid_data->sta_id = mvm_sta->sta_id; 2155 2156 mvm_sta->tid_to_baid[tid] = baid; 2157 if (timeout) 2158 mod_timer(&baid_data->session_timer, 2159 TU_TO_EXP_TIME(timeout * 2)); 2160 2161 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 2162 baid_data, ssn, buf_size); 2163 /* 2164 * protect the BA data with RCU to cover a case where our 2165 * internal RX sync mechanism will timeout (not that it's 2166 * supposed to happen) and we will free the session data while 2167 * RX is being processed in parallel 2168 */ 2169 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2170 mvm_sta->sta_id, tid, baid); 2171 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2172 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2173 } else { 2174 u8 baid = mvm_sta->tid_to_baid[tid]; 2175 2176 if (mvm->rx_ba_sessions > 0) 2177 /* check that restart flow didn't zero the counter */ 2178 mvm->rx_ba_sessions--; 2179 if (!iwl_mvm_has_new_rx_api(mvm)) 2180 return 0; 2181 2182 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2183 return -EINVAL; 2184 2185 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2186 if (WARN_ON(!baid_data)) 2187 return -EINVAL; 2188 2189 /* synchronize all rx queues so we can safely delete */ 2190 iwl_mvm_free_reorder(mvm, baid_data); 2191 del_timer_sync(&baid_data->session_timer); 2192 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2193 kfree_rcu(baid_data, rcu_head); 2194 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2195 } 2196 return 0; 2197 2198 out_free: 2199 kfree(baid_data); 2200 return ret; 2201 } 2202 2203 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2204 int tid, u8 queue, bool start) 2205 { 2206 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2207 struct iwl_mvm_add_sta_cmd cmd = {}; 2208 int ret; 2209 u32 status; 2210 2211 lockdep_assert_held(&mvm->mutex); 2212 2213 if (start) { 2214 mvm_sta->tfd_queue_msk |= BIT(queue); 2215 mvm_sta->tid_disable_agg &= ~BIT(tid); 2216 } else { 2217 /* In DQA-mode the queue isn't removed on agg termination */ 2218 if (!iwl_mvm_is_dqa_supported(mvm)) 2219 mvm_sta->tfd_queue_msk &= ~BIT(queue); 2220 mvm_sta->tid_disable_agg |= BIT(tid); 2221 } 2222 2223 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2224 cmd.sta_id = mvm_sta->sta_id; 2225 cmd.add_modify = STA_MODE_MODIFY; 2226 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; 2227 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2228 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2229 2230 status = ADD_STA_SUCCESS; 2231 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2232 iwl_mvm_add_sta_cmd_size(mvm), 2233 &cmd, &status); 2234 if (ret) 2235 return ret; 2236 2237 switch (status & IWL_ADD_STA_STATUS_MASK) { 2238 case ADD_STA_SUCCESS: 2239 break; 2240 default: 2241 ret = -EIO; 2242 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2243 start ? "start" : "stopp", status); 2244 break; 2245 } 2246 2247 return ret; 2248 } 2249 2250 const u8 tid_to_mac80211_ac[] = { 2251 IEEE80211_AC_BE, 2252 IEEE80211_AC_BK, 2253 IEEE80211_AC_BK, 2254 IEEE80211_AC_BE, 2255 IEEE80211_AC_VI, 2256 IEEE80211_AC_VI, 2257 IEEE80211_AC_VO, 2258 IEEE80211_AC_VO, 2259 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2260 }; 2261 2262 static const u8 tid_to_ucode_ac[] = { 2263 AC_BE, 2264 AC_BK, 2265 AC_BK, 2266 AC_BE, 2267 AC_VI, 2268 AC_VI, 2269 AC_VO, 2270 AC_VO, 2271 }; 2272 2273 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2274 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2275 { 2276 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2277 struct iwl_mvm_tid_data *tid_data; 2278 int txq_id; 2279 int ret; 2280 2281 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2282 return -EINVAL; 2283 2284 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2285 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 2286 mvmsta->tid_data[tid].state); 2287 return -ENXIO; 2288 } 2289 2290 lockdep_assert_held(&mvm->mutex); 2291 2292 spin_lock_bh(&mvmsta->lock); 2293 2294 /* possible race condition - we entered D0i3 while starting agg */ 2295 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2296 spin_unlock_bh(&mvmsta->lock); 2297 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2298 return -EIO; 2299 } 2300 2301 spin_lock(&mvm->queue_info_lock); 2302 2303 /* 2304 * Note the possible cases: 2305 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2306 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2307 * one and mark it as reserved 2308 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2309 * non-DQA mode, since the TXQ hasn't yet been allocated 2310 */ 2311 txq_id = mvmsta->tid_data[tid].txq_id; 2312 if (iwl_mvm_is_dqa_supported(mvm) && 2313 unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) { 2314 ret = -ENXIO; 2315 IWL_DEBUG_TX_QUEUES(mvm, 2316 "Can't start tid %d agg on shared queue!\n", 2317 tid); 2318 goto release_locks; 2319 } else if (!iwl_mvm_is_dqa_supported(mvm) || 2320 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2321 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2322 mvm->first_agg_queue, 2323 mvm->last_agg_queue); 2324 if (txq_id < 0) { 2325 ret = txq_id; 2326 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2327 goto release_locks; 2328 } 2329 /* 2330 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2331 * an inactive queue from iwl_mvm_find_free_queue() is 2332 * certainly a bug 2333 */ 2334 WARN_ON(mvm->queue_info[txq_id].status == 2335 IWL_MVM_QUEUE_INACTIVE); 2336 2337 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2338 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2339 } 2340 2341 spin_unlock(&mvm->queue_info_lock); 2342 2343 IWL_DEBUG_TX_QUEUES(mvm, 2344 "AGG for tid %d will be on queue #%d\n", 2345 tid, txq_id); 2346 2347 tid_data = &mvmsta->tid_data[tid]; 2348 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2349 tid_data->txq_id = txq_id; 2350 *ssn = tid_data->ssn; 2351 2352 IWL_DEBUG_TX_QUEUES(mvm, 2353 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2354 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2355 tid_data->next_reclaimed); 2356 2357 if (tid_data->ssn == tid_data->next_reclaimed) { 2358 tid_data->state = IWL_AGG_STARTING; 2359 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2360 } else { 2361 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2362 } 2363 2364 ret = 0; 2365 goto out; 2366 2367 release_locks: 2368 spin_unlock(&mvm->queue_info_lock); 2369 out: 2370 spin_unlock_bh(&mvmsta->lock); 2371 2372 return ret; 2373 } 2374 2375 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2376 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2377 bool amsdu) 2378 { 2379 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2380 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2381 unsigned int wdg_timeout = 2382 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2383 int queue, ret; 2384 bool alloc_queue = true; 2385 enum iwl_mvm_queue_status queue_status; 2386 u16 ssn; 2387 2388 struct iwl_trans_txq_scd_cfg cfg = { 2389 .sta_id = mvmsta->sta_id, 2390 .tid = tid, 2391 .frame_limit = buf_size, 2392 .aggregate = true, 2393 }; 2394 2395 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2396 != IWL_MAX_TID_COUNT); 2397 2398 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2399 2400 spin_lock_bh(&mvmsta->lock); 2401 ssn = tid_data->ssn; 2402 queue = tid_data->txq_id; 2403 tid_data->state = IWL_AGG_ON; 2404 mvmsta->agg_tids |= BIT(tid); 2405 tid_data->ssn = 0xffff; 2406 tid_data->amsdu_in_ampdu_allowed = amsdu; 2407 spin_unlock_bh(&mvmsta->lock); 2408 2409 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2410 2411 spin_lock_bh(&mvm->queue_info_lock); 2412 queue_status = mvm->queue_info[queue].status; 2413 spin_unlock_bh(&mvm->queue_info_lock); 2414 2415 /* In DQA mode, the existing queue might need to be reconfigured */ 2416 if (iwl_mvm_is_dqa_supported(mvm)) { 2417 /* Maybe there is no need to even alloc a queue... */ 2418 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2419 alloc_queue = false; 2420 2421 /* 2422 * Only reconfig the SCD for the queue if the window size has 2423 * changed from current (become smaller) 2424 */ 2425 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2426 /* 2427 * If reconfiguring an existing queue, it first must be 2428 * drained 2429 */ 2430 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 2431 BIT(queue)); 2432 if (ret) { 2433 IWL_ERR(mvm, 2434 "Error draining queue before reconfig\n"); 2435 return ret; 2436 } 2437 2438 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2439 mvmsta->sta_id, tid, 2440 buf_size, ssn); 2441 if (ret) { 2442 IWL_ERR(mvm, 2443 "Error reconfiguring TXQ #%d\n", queue); 2444 return ret; 2445 } 2446 } 2447 } 2448 2449 if (alloc_queue) 2450 iwl_mvm_enable_txq(mvm, queue, 2451 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2452 &cfg, wdg_timeout); 2453 2454 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2455 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2456 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2457 if (ret) 2458 return -EIO; 2459 } 2460 2461 /* No need to mark as reserved */ 2462 spin_lock_bh(&mvm->queue_info_lock); 2463 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2464 spin_unlock_bh(&mvm->queue_info_lock); 2465 2466 /* 2467 * Even though in theory the peer could have different 2468 * aggregation reorder buffer sizes for different sessions, 2469 * our ucode doesn't allow for that and has a global limit 2470 * for each station. Therefore, use the minimum of all the 2471 * aggregation sessions and our default value. 2472 */ 2473 mvmsta->max_agg_bufsize = 2474 min(mvmsta->max_agg_bufsize, buf_size); 2475 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2476 2477 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2478 sta->addr, tid); 2479 2480 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2481 } 2482 2483 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2484 struct ieee80211_sta *sta, u16 tid) 2485 { 2486 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2487 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2488 u16 txq_id; 2489 int err; 2490 2491 /* 2492 * If mac80211 is cleaning its state, then say that we finished since 2493 * our state has been cleared anyway. 2494 */ 2495 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2496 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2497 return 0; 2498 } 2499 2500 spin_lock_bh(&mvmsta->lock); 2501 2502 txq_id = tid_data->txq_id; 2503 2504 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2505 mvmsta->sta_id, tid, txq_id, tid_data->state); 2506 2507 mvmsta->agg_tids &= ~BIT(tid); 2508 2509 spin_lock_bh(&mvm->queue_info_lock); 2510 /* 2511 * The TXQ is marked as reserved only if no traffic came through yet 2512 * This means no traffic has been sent on this TID (agg'd or not), so 2513 * we no longer have use for the queue. Since it hasn't even been 2514 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2515 * free. 2516 */ 2517 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2518 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2519 2520 spin_unlock_bh(&mvm->queue_info_lock); 2521 2522 switch (tid_data->state) { 2523 case IWL_AGG_ON: 2524 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2525 2526 IWL_DEBUG_TX_QUEUES(mvm, 2527 "ssn = %d, next_recl = %d\n", 2528 tid_data->ssn, tid_data->next_reclaimed); 2529 2530 /* There are still packets for this RA / TID in the HW */ 2531 if (tid_data->ssn != tid_data->next_reclaimed) { 2532 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; 2533 err = 0; 2534 break; 2535 } 2536 2537 tid_data->ssn = 0xffff; 2538 tid_data->state = IWL_AGG_OFF; 2539 spin_unlock_bh(&mvmsta->lock); 2540 2541 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2542 2543 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2544 2545 if (!iwl_mvm_is_dqa_supported(mvm)) { 2546 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2547 2548 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0); 2549 } 2550 return 0; 2551 case IWL_AGG_STARTING: 2552 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2553 /* 2554 * The agg session has been stopped before it was set up. This 2555 * can happen when the AddBA timer times out for example. 2556 */ 2557 2558 /* No barriers since we are under mutex */ 2559 lockdep_assert_held(&mvm->mutex); 2560 2561 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2562 tid_data->state = IWL_AGG_OFF; 2563 err = 0; 2564 break; 2565 default: 2566 IWL_ERR(mvm, 2567 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2568 mvmsta->sta_id, tid, tid_data->state); 2569 IWL_ERR(mvm, 2570 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2571 err = -EINVAL; 2572 } 2573 2574 spin_unlock_bh(&mvmsta->lock); 2575 2576 return err; 2577 } 2578 2579 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2580 struct ieee80211_sta *sta, u16 tid) 2581 { 2582 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2583 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2584 u16 txq_id; 2585 enum iwl_mvm_agg_state old_state; 2586 2587 /* 2588 * First set the agg state to OFF to avoid calling 2589 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2590 */ 2591 spin_lock_bh(&mvmsta->lock); 2592 txq_id = tid_data->txq_id; 2593 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2594 mvmsta->sta_id, tid, txq_id, tid_data->state); 2595 old_state = tid_data->state; 2596 tid_data->state = IWL_AGG_OFF; 2597 mvmsta->agg_tids &= ~BIT(tid); 2598 spin_unlock_bh(&mvmsta->lock); 2599 2600 spin_lock_bh(&mvm->queue_info_lock); 2601 /* 2602 * The TXQ is marked as reserved only if no traffic came through yet 2603 * This means no traffic has been sent on this TID (agg'd or not), so 2604 * we no longer have use for the queue. Since it hasn't even been 2605 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2606 * free. 2607 */ 2608 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2609 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2610 spin_unlock_bh(&mvm->queue_info_lock); 2611 2612 if (old_state >= IWL_AGG_ON) { 2613 iwl_mvm_drain_sta(mvm, mvmsta, true); 2614 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2615 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2616 iwl_trans_wait_tx_queue_empty(mvm->trans, 2617 mvmsta->tfd_queue_msk); 2618 iwl_mvm_drain_sta(mvm, mvmsta, false); 2619 2620 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2621 2622 if (!iwl_mvm_is_dqa_supported(mvm)) { 2623 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2624 2625 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue, 2626 tid, 0); 2627 } 2628 } 2629 2630 return 0; 2631 } 2632 2633 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2634 { 2635 int i, max = -1, max_offs = -1; 2636 2637 lockdep_assert_held(&mvm->mutex); 2638 2639 /* Pick the unused key offset with the highest 'deleted' 2640 * counter. Every time a key is deleted, all the counters 2641 * are incremented and the one that was just deleted is 2642 * reset to zero. Thus, the highest counter is the one 2643 * that was deleted longest ago. Pick that one. 2644 */ 2645 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2646 if (test_bit(i, mvm->fw_key_table)) 2647 continue; 2648 if (mvm->fw_key_deleted[i] > max) { 2649 max = mvm->fw_key_deleted[i]; 2650 max_offs = i; 2651 } 2652 } 2653 2654 if (max_offs < 0) 2655 return STA_KEY_IDX_INVALID; 2656 2657 return max_offs; 2658 } 2659 2660 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2661 struct ieee80211_vif *vif, 2662 struct ieee80211_sta *sta) 2663 { 2664 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2665 2666 if (sta) 2667 return iwl_mvm_sta_from_mac80211(sta); 2668 2669 /* 2670 * The device expects GTKs for station interfaces to be 2671 * installed as GTKs for the AP station. If we have no 2672 * station ID, then use AP's station ID. 2673 */ 2674 if (vif->type == NL80211_IFTYPE_STATION && 2675 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 2676 u8 sta_id = mvmvif->ap_sta_id; 2677 2678 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2679 lockdep_is_held(&mvm->mutex)); 2680 2681 /* 2682 * It is possible that the 'sta' parameter is NULL, 2683 * for example when a GTK is removed - the sta_id will then 2684 * be the AP ID, and no station was passed by mac80211. 2685 */ 2686 if (IS_ERR_OR_NULL(sta)) 2687 return NULL; 2688 2689 return iwl_mvm_sta_from_mac80211(sta); 2690 } 2691 2692 return NULL; 2693 } 2694 2695 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2696 struct iwl_mvm_sta *mvm_sta, 2697 struct ieee80211_key_conf *keyconf, bool mcast, 2698 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2699 u8 key_offset) 2700 { 2701 struct iwl_mvm_add_sta_key_cmd cmd = {}; 2702 __le16 key_flags; 2703 int ret; 2704 u32 status; 2705 u16 keyidx; 2706 int i; 2707 u8 sta_id = mvm_sta->sta_id; 2708 2709 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2710 STA_KEY_FLG_KEYID_MSK; 2711 key_flags = cpu_to_le16(keyidx); 2712 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2713 2714 switch (keyconf->cipher) { 2715 case WLAN_CIPHER_SUITE_TKIP: 2716 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2717 cmd.tkip_rx_tsc_byte2 = tkip_iv32; 2718 for (i = 0; i < 5; i++) 2719 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); 2720 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2721 break; 2722 case WLAN_CIPHER_SUITE_CCMP: 2723 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2724 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2725 break; 2726 case WLAN_CIPHER_SUITE_WEP104: 2727 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2728 /* fall through */ 2729 case WLAN_CIPHER_SUITE_WEP40: 2730 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2731 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); 2732 break; 2733 case WLAN_CIPHER_SUITE_GCMP_256: 2734 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2735 /* fall through */ 2736 case WLAN_CIPHER_SUITE_GCMP: 2737 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2738 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2739 break; 2740 default: 2741 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2742 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2743 } 2744 2745 if (mcast) 2746 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2747 2748 cmd.key_offset = key_offset; 2749 cmd.key_flags = key_flags; 2750 cmd.sta_id = sta_id; 2751 2752 status = ADD_STA_SUCCESS; 2753 if (cmd_flags & CMD_ASYNC) 2754 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, 2755 sizeof(cmd), &cmd); 2756 else 2757 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 2758 &cmd, &status); 2759 2760 switch (status) { 2761 case ADD_STA_SUCCESS: 2762 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2763 break; 2764 default: 2765 ret = -EIO; 2766 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2767 break; 2768 } 2769 2770 return ret; 2771 } 2772 2773 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2774 struct ieee80211_key_conf *keyconf, 2775 u8 sta_id, bool remove_key) 2776 { 2777 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 2778 2779 /* verify the key details match the required command's expectations */ 2780 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 2781 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 2782 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 2783 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 2784 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 2785 return -EINVAL; 2786 2787 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 2788 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 2789 return -EINVAL; 2790 2791 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 2792 igtk_cmd.sta_id = cpu_to_le32(sta_id); 2793 2794 if (remove_key) { 2795 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 2796 } else { 2797 struct ieee80211_key_seq seq; 2798 const u8 *pn; 2799 2800 switch (keyconf->cipher) { 2801 case WLAN_CIPHER_SUITE_AES_CMAC: 2802 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 2803 break; 2804 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 2805 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 2806 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 2807 break; 2808 default: 2809 return -EINVAL; 2810 } 2811 2812 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 2813 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2814 igtk_cmd.ctrl_flags |= 2815 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 2816 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2817 pn = seq.aes_cmac.pn; 2818 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 2819 ((u64) pn[4] << 8) | 2820 ((u64) pn[3] << 16) | 2821 ((u64) pn[2] << 24) | 2822 ((u64) pn[1] << 32) | 2823 ((u64) pn[0] << 40)); 2824 } 2825 2826 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 2827 remove_key ? "removing" : "installing", 2828 igtk_cmd.sta_id); 2829 2830 if (!iwl_mvm_has_new_rx_api(mvm)) { 2831 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 2832 .ctrl_flags = igtk_cmd.ctrl_flags, 2833 .key_id = igtk_cmd.key_id, 2834 .sta_id = igtk_cmd.sta_id, 2835 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 2836 }; 2837 2838 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 2839 ARRAY_SIZE(igtk_cmd_v1.igtk)); 2840 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2841 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 2842 } 2843 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2844 sizeof(igtk_cmd), &igtk_cmd); 2845 } 2846 2847 2848 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 2849 struct ieee80211_vif *vif, 2850 struct ieee80211_sta *sta) 2851 { 2852 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2853 2854 if (sta) 2855 return sta->addr; 2856 2857 if (vif->type == NL80211_IFTYPE_STATION && 2858 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 2859 u8 sta_id = mvmvif->ap_sta_id; 2860 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 2861 lockdep_is_held(&mvm->mutex)); 2862 return sta->addr; 2863 } 2864 2865 2866 return NULL; 2867 } 2868 2869 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 2870 struct ieee80211_vif *vif, 2871 struct ieee80211_sta *sta, 2872 struct ieee80211_key_conf *keyconf, 2873 u8 key_offset, 2874 bool mcast) 2875 { 2876 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2877 int ret; 2878 const u8 *addr; 2879 struct ieee80211_key_seq seq; 2880 u16 p1k[5]; 2881 2882 switch (keyconf->cipher) { 2883 case WLAN_CIPHER_SUITE_TKIP: 2884 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 2885 /* get phase 1 key from mac80211 */ 2886 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2887 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 2888 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2889 seq.tkip.iv32, p1k, 0, key_offset); 2890 break; 2891 case WLAN_CIPHER_SUITE_CCMP: 2892 case WLAN_CIPHER_SUITE_WEP40: 2893 case WLAN_CIPHER_SUITE_WEP104: 2894 case WLAN_CIPHER_SUITE_GCMP: 2895 case WLAN_CIPHER_SUITE_GCMP_256: 2896 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2897 0, NULL, 0, key_offset); 2898 break; 2899 default: 2900 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2901 0, NULL, 0, key_offset); 2902 } 2903 2904 return ret; 2905 } 2906 2907 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2908 struct ieee80211_key_conf *keyconf, 2909 bool mcast) 2910 { 2911 struct iwl_mvm_add_sta_key_cmd cmd = {}; 2912 __le16 key_flags; 2913 int ret; 2914 u32 status; 2915 2916 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2917 STA_KEY_FLG_KEYID_MSK); 2918 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2919 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2920 2921 if (mcast) 2922 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2923 2924 cmd.key_flags = key_flags; 2925 cmd.key_offset = keyconf->hw_key_idx; 2926 cmd.sta_id = sta_id; 2927 2928 status = ADD_STA_SUCCESS; 2929 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 2930 &cmd, &status); 2931 2932 switch (status) { 2933 case ADD_STA_SUCCESS: 2934 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2935 break; 2936 default: 2937 ret = -EIO; 2938 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2939 break; 2940 } 2941 2942 return ret; 2943 } 2944 2945 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 2946 struct ieee80211_vif *vif, 2947 struct ieee80211_sta *sta, 2948 struct ieee80211_key_conf *keyconf, 2949 u8 key_offset) 2950 { 2951 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 2952 struct iwl_mvm_sta *mvm_sta; 2953 u8 sta_id; 2954 int ret; 2955 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 2956 2957 lockdep_assert_held(&mvm->mutex); 2958 2959 /* Get the station id from the mvm local station table */ 2960 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 2961 if (!mvm_sta) { 2962 IWL_ERR(mvm, "Failed to find station\n"); 2963 return -EINVAL; 2964 } 2965 sta_id = mvm_sta->sta_id; 2966 2967 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 2968 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 2969 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 2970 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 2971 goto end; 2972 } 2973 2974 /* 2975 * It is possible that the 'sta' parameter is NULL, and thus 2976 * there is a need to retrieve the sta from the local station table. 2977 */ 2978 if (!sta) { 2979 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 2980 lockdep_is_held(&mvm->mutex)); 2981 if (IS_ERR_OR_NULL(sta)) { 2982 IWL_ERR(mvm, "Invalid station id\n"); 2983 return -EINVAL; 2984 } 2985 } 2986 2987 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 2988 return -EINVAL; 2989 2990 /* If the key_offset is not pre-assigned, we need to find a 2991 * new offset to use. In normal cases, the offset is not 2992 * pre-assigned, but during HW_RESTART we want to reuse the 2993 * same indices, so we pass them when this function is called. 2994 * 2995 * In D3 entry, we need to hardcoded the indices (because the 2996 * firmware hardcodes the PTK offset to 0). In this case, we 2997 * need to make sure we don't overwrite the hw_key_idx in the 2998 * keyconf structure, because otherwise we cannot configure 2999 * the original ones back when resuming. 3000 */ 3001 if (key_offset == STA_KEY_IDX_INVALID) { 3002 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3003 if (key_offset == STA_KEY_IDX_INVALID) 3004 return -ENOSPC; 3005 keyconf->hw_key_idx = key_offset; 3006 } 3007 3008 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3009 if (ret) 3010 goto end; 3011 3012 /* 3013 * For WEP, the same key is used for multicast and unicast. Upload it 3014 * again, using the same key offset, and now pointing the other one 3015 * to the same key slot (offset). 3016 * If this fails, remove the original as well. 3017 */ 3018 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3019 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { 3020 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3021 key_offset, !mcast); 3022 if (ret) { 3023 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3024 goto end; 3025 } 3026 } 3027 3028 __set_bit(key_offset, mvm->fw_key_table); 3029 3030 end: 3031 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3032 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3033 sta ? sta->addr : zero_addr, ret); 3034 return ret; 3035 } 3036 3037 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3038 struct ieee80211_vif *vif, 3039 struct ieee80211_sta *sta, 3040 struct ieee80211_key_conf *keyconf) 3041 { 3042 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3043 struct iwl_mvm_sta *mvm_sta; 3044 u8 sta_id = IWL_MVM_STATION_COUNT; 3045 int ret, i; 3046 3047 lockdep_assert_held(&mvm->mutex); 3048 3049 /* Get the station from the mvm local station table */ 3050 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3051 if (!mvm_sta) { 3052 IWL_ERR(mvm, "Failed to find station\n"); 3053 return -EINVAL; 3054 } 3055 sta_id = mvm_sta->sta_id; 3056 3057 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3058 keyconf->keyidx, sta_id); 3059 3060 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3061 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3062 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3063 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3064 3065 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3066 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3067 keyconf->hw_key_idx); 3068 return -ENOENT; 3069 } 3070 3071 /* track which key was deleted last */ 3072 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3073 if (mvm->fw_key_deleted[i] < U8_MAX) 3074 mvm->fw_key_deleted[i]++; 3075 } 3076 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3077 3078 if (!mvm_sta) { 3079 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3080 return 0; 3081 } 3082 3083 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3084 if (ret) 3085 return ret; 3086 3087 /* delete WEP key twice to get rid of (now useless) offset */ 3088 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3089 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3090 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3091 3092 return ret; 3093 } 3094 3095 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3096 struct ieee80211_vif *vif, 3097 struct ieee80211_key_conf *keyconf, 3098 struct ieee80211_sta *sta, u32 iv32, 3099 u16 *phase1key) 3100 { 3101 struct iwl_mvm_sta *mvm_sta; 3102 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3103 3104 rcu_read_lock(); 3105 3106 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3107 if (WARN_ON_ONCE(!mvm_sta)) 3108 goto unlock; 3109 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 3110 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3111 3112 unlock: 3113 rcu_read_unlock(); 3114 } 3115 3116 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3117 struct ieee80211_sta *sta) 3118 { 3119 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3120 struct iwl_mvm_add_sta_cmd cmd = { 3121 .add_modify = STA_MODE_MODIFY, 3122 .sta_id = mvmsta->sta_id, 3123 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3124 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3125 }; 3126 int ret; 3127 3128 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3129 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3130 if (ret) 3131 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3132 } 3133 3134 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3135 struct ieee80211_sta *sta, 3136 enum ieee80211_frame_release_type reason, 3137 u16 cnt, u16 tids, bool more_data, 3138 bool single_sta_queue) 3139 { 3140 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3141 struct iwl_mvm_add_sta_cmd cmd = { 3142 .add_modify = STA_MODE_MODIFY, 3143 .sta_id = mvmsta->sta_id, 3144 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3145 .sleep_tx_count = cpu_to_le16(cnt), 3146 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3147 }; 3148 int tid, ret; 3149 unsigned long _tids = tids; 3150 3151 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3152 * Note that this field is reserved and unused by firmware not 3153 * supporting GO uAPSD, so it's safe to always do this. 3154 */ 3155 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3156 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3157 3158 /* If we're releasing frames from aggregation or dqa queues then check 3159 * if all the queues that we're releasing frames from, combined, have: 3160 * - more frames than the service period, in which case more_data 3161 * needs to be set 3162 * - fewer than 'cnt' frames, in which case we need to adjust the 3163 * firmware command (but do that unconditionally) 3164 */ 3165 if (single_sta_queue) { 3166 int remaining = cnt; 3167 int sleep_tx_count; 3168 3169 spin_lock_bh(&mvmsta->lock); 3170 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3171 struct iwl_mvm_tid_data *tid_data; 3172 u16 n_queued; 3173 3174 tid_data = &mvmsta->tid_data[tid]; 3175 if (WARN(!iwl_mvm_is_dqa_supported(mvm) && 3176 tid_data->state != IWL_AGG_ON && 3177 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, 3178 "TID %d state is %d\n", 3179 tid, tid_data->state)) { 3180 spin_unlock_bh(&mvmsta->lock); 3181 ieee80211_sta_eosp(sta); 3182 return; 3183 } 3184 3185 n_queued = iwl_mvm_tid_queued(tid_data); 3186 if (n_queued > remaining) { 3187 more_data = true; 3188 remaining = 0; 3189 break; 3190 } 3191 remaining -= n_queued; 3192 } 3193 sleep_tx_count = cnt - remaining; 3194 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3195 mvmsta->sleep_tx_count = sleep_tx_count; 3196 spin_unlock_bh(&mvmsta->lock); 3197 3198 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3199 if (WARN_ON(cnt - remaining == 0)) { 3200 ieee80211_sta_eosp(sta); 3201 return; 3202 } 3203 } 3204 3205 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3206 if (more_data) 3207 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); 3208 3209 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3210 mvmsta->next_status_eosp = true; 3211 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); 3212 } else { 3213 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); 3214 } 3215 3216 /* block the Tx queues until the FW updated the sleep Tx count */ 3217 iwl_trans_block_txq_ptrs(mvm->trans, true); 3218 3219 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3220 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3221 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3222 if (ret) 3223 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3224 } 3225 3226 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3227 struct iwl_rx_cmd_buffer *rxb) 3228 { 3229 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3230 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3231 struct ieee80211_sta *sta; 3232 u32 sta_id = le32_to_cpu(notif->sta_id); 3233 3234 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3235 return; 3236 3237 rcu_read_lock(); 3238 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3239 if (!IS_ERR_OR_NULL(sta)) 3240 ieee80211_sta_eosp(sta); 3241 rcu_read_unlock(); 3242 } 3243 3244 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3245 struct iwl_mvm_sta *mvmsta, bool disable) 3246 { 3247 struct iwl_mvm_add_sta_cmd cmd = { 3248 .add_modify = STA_MODE_MODIFY, 3249 .sta_id = mvmsta->sta_id, 3250 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3251 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3252 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3253 }; 3254 int ret; 3255 3256 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3257 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3258 if (ret) 3259 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3260 } 3261 3262 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3263 struct ieee80211_sta *sta, 3264 bool disable) 3265 { 3266 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3267 3268 spin_lock_bh(&mvm_sta->lock); 3269 3270 if (mvm_sta->disable_tx == disable) { 3271 spin_unlock_bh(&mvm_sta->lock); 3272 return; 3273 } 3274 3275 mvm_sta->disable_tx = disable; 3276 3277 /* 3278 * Tell mac80211 to start/stop queuing tx for this station, 3279 * but don't stop queuing if there are still pending frames 3280 * for this station. 3281 */ 3282 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) 3283 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3284 3285 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3286 3287 spin_unlock_bh(&mvm_sta->lock); 3288 } 3289 3290 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3291 struct iwl_mvm_vif *mvmvif, 3292 bool disable) 3293 { 3294 struct ieee80211_sta *sta; 3295 struct iwl_mvm_sta *mvm_sta; 3296 int i; 3297 3298 lockdep_assert_held(&mvm->mutex); 3299 3300 /* Block/unblock all the stations of the given mvmvif */ 3301 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { 3302 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3303 lockdep_is_held(&mvm->mutex)); 3304 if (IS_ERR_OR_NULL(sta)) 3305 continue; 3306 3307 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3308 if (mvm_sta->mac_id_n_color != 3309 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3310 continue; 3311 3312 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3313 } 3314 } 3315 3316 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3317 { 3318 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3319 struct iwl_mvm_sta *mvmsta; 3320 3321 rcu_read_lock(); 3322 3323 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3324 3325 if (!WARN_ON(!mvmsta)) 3326 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3327 3328 rcu_read_unlock(); 3329 } 3330