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 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 #include <net/mac80211.h> 65 66 #include "mvm.h" 67 #include "sta.h" 68 #include "rs.h" 69 70 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm); 71 72 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 73 u32 sta_id, 74 struct ieee80211_key_conf *key, bool mcast, 75 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 76 u8 key_offset, bool mfp); 77 78 /* 79 * New version of ADD_STA_sta command added new fields at the end of the 80 * structure, so sending the size of the relevant API's structure is enough to 81 * support both API versions. 82 */ 83 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 84 { 85 if (iwl_mvm_has_new_rx_api(mvm) || 86 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 87 return sizeof(struct iwl_mvm_add_sta_cmd); 88 else 89 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 90 } 91 92 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 93 enum nl80211_iftype iftype) 94 { 95 int sta_id; 96 u32 reserved_ids = 0; 97 98 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 99 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 100 101 lockdep_assert_held(&mvm->mutex); 102 103 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 104 if (iftype != NL80211_IFTYPE_STATION) 105 reserved_ids = BIT(0); 106 107 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 108 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 109 if (BIT(sta_id) & reserved_ids) 110 continue; 111 112 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 113 lockdep_is_held(&mvm->mutex))) 114 return sta_id; 115 } 116 return IWL_MVM_INVALID_STA; 117 } 118 119 /* send station add/update command to firmware */ 120 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 121 bool update, unsigned int flags) 122 { 123 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 124 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 125 .sta_id = mvm_sta->sta_id, 126 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 127 .add_modify = update ? 1 : 0, 128 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 129 STA_FLG_MIMO_EN_MSK | 130 STA_FLG_RTS_MIMO_PROT), 131 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 132 }; 133 int ret; 134 u32 status; 135 u32 agg_size = 0, mpdu_dens = 0; 136 137 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 138 add_sta_cmd.station_type = mvm_sta->sta_type; 139 140 if (!update || (flags & STA_MODIFY_QUEUES)) { 141 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 142 143 if (!iwl_mvm_has_new_tx_api(mvm)) { 144 add_sta_cmd.tfd_queue_msk = 145 cpu_to_le32(mvm_sta->tfd_queue_msk); 146 147 if (flags & STA_MODIFY_QUEUES) 148 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 149 } else { 150 WARN_ON(flags & STA_MODIFY_QUEUES); 151 } 152 } 153 154 switch (sta->bandwidth) { 155 case IEEE80211_STA_RX_BW_160: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 157 /* fall through */ 158 case IEEE80211_STA_RX_BW_80: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 160 /* fall through */ 161 case IEEE80211_STA_RX_BW_40: 162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 163 /* fall through */ 164 case IEEE80211_STA_RX_BW_20: 165 if (sta->ht_cap.ht_supported) 166 add_sta_cmd.station_flags |= 167 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 168 break; 169 } 170 171 switch (sta->rx_nss) { 172 case 1: 173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 174 break; 175 case 2: 176 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 177 break; 178 case 3 ... 8: 179 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 180 break; 181 } 182 183 switch (sta->smps_mode) { 184 case IEEE80211_SMPS_AUTOMATIC: 185 case IEEE80211_SMPS_NUM_MODES: 186 WARN_ON(1); 187 break; 188 case IEEE80211_SMPS_STATIC: 189 /* override NSS */ 190 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 191 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 192 break; 193 case IEEE80211_SMPS_DYNAMIC: 194 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 195 break; 196 case IEEE80211_SMPS_OFF: 197 /* nothing */ 198 break; 199 } 200 201 if (sta->ht_cap.ht_supported) { 202 add_sta_cmd.station_flags_msk |= 203 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 204 STA_FLG_AGG_MPDU_DENS_MSK); 205 206 mpdu_dens = sta->ht_cap.ampdu_density; 207 } 208 209 if (sta->vht_cap.vht_supported) { 210 agg_size = sta->vht_cap.cap & 211 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 212 agg_size >>= 213 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 214 } else if (sta->ht_cap.ht_supported) { 215 agg_size = sta->ht_cap.ampdu_factor; 216 } 217 218 add_sta_cmd.station_flags |= 219 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 220 add_sta_cmd.station_flags |= 221 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 222 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 223 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 224 225 if (sta->wme) { 226 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 227 228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 229 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 230 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 231 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 232 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 233 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 234 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 235 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 236 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 237 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 238 } 239 240 status = ADD_STA_SUCCESS; 241 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 242 iwl_mvm_add_sta_cmd_size(mvm), 243 &add_sta_cmd, &status); 244 if (ret) 245 return ret; 246 247 switch (status & IWL_ADD_STA_STATUS_MASK) { 248 case ADD_STA_SUCCESS: 249 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 250 break; 251 default: 252 ret = -EIO; 253 IWL_ERR(mvm, "ADD_STA failed\n"); 254 break; 255 } 256 257 return ret; 258 } 259 260 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 261 { 262 struct iwl_mvm_baid_data *data = 263 from_timer(data, t, session_timer); 264 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 265 struct iwl_mvm_baid_data *ba_data; 266 struct ieee80211_sta *sta; 267 struct iwl_mvm_sta *mvm_sta; 268 unsigned long timeout; 269 270 rcu_read_lock(); 271 272 ba_data = rcu_dereference(*rcu_ptr); 273 274 if (WARN_ON(!ba_data)) 275 goto unlock; 276 277 if (!ba_data->timeout) 278 goto unlock; 279 280 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 281 if (time_is_after_jiffies(timeout)) { 282 mod_timer(&ba_data->session_timer, timeout); 283 goto unlock; 284 } 285 286 /* Timer expired */ 287 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 288 289 /* 290 * sta should be valid unless the following happens: 291 * The firmware asserts which triggers a reconfig flow, but 292 * the reconfig fails before we set the pointer to sta into 293 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 294 * A-MDPU and hence the timer continues to run. Then, the 295 * timer expires and sta is NULL. 296 */ 297 if (!sta) 298 goto unlock; 299 300 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 301 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 302 sta->addr, ba_data->tid); 303 unlock: 304 rcu_read_unlock(); 305 } 306 307 /* Disable aggregations for a bitmap of TIDs for a given station */ 308 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 309 unsigned long disable_agg_tids, 310 bool remove_queue) 311 { 312 struct iwl_mvm_add_sta_cmd cmd = {}; 313 struct ieee80211_sta *sta; 314 struct iwl_mvm_sta *mvmsta; 315 u32 status; 316 u8 sta_id; 317 318 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 319 return -EINVAL; 320 321 sta_id = mvm->queue_info[queue].ra_sta_id; 322 323 rcu_read_lock(); 324 325 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 326 327 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 328 rcu_read_unlock(); 329 return -EINVAL; 330 } 331 332 mvmsta = iwl_mvm_sta_from_mac80211(sta); 333 334 mvmsta->tid_disable_agg |= disable_agg_tids; 335 336 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 337 cmd.sta_id = mvmsta->sta_id; 338 cmd.add_modify = STA_MODE_MODIFY; 339 cmd.modify_mask = STA_MODIFY_QUEUES; 340 if (disable_agg_tids) 341 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 342 if (remove_queue) 343 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 344 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 345 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 346 347 rcu_read_unlock(); 348 349 /* Notify FW of queue removal from the STA queues */ 350 status = ADD_STA_SUCCESS; 351 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 352 iwl_mvm_add_sta_cmd_size(mvm), 353 &cmd, &status); 354 } 355 356 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 357 int queue, u8 tid, u8 flags) 358 { 359 struct iwl_scd_txq_cfg_cmd cmd = { 360 .scd_queue = queue, 361 .action = SCD_CFG_DISABLE_QUEUE, 362 }; 363 int ret; 364 365 if (iwl_mvm_has_new_tx_api(mvm)) { 366 iwl_trans_txq_free(mvm->trans, queue); 367 368 return 0; 369 } 370 371 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 372 return 0; 373 374 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 375 376 cmd.action = mvm->queue_info[queue].tid_bitmap ? 377 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 378 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 379 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 380 381 IWL_DEBUG_TX_QUEUES(mvm, 382 "Disabling TXQ #%d tids=0x%x\n", 383 queue, 384 mvm->queue_info[queue].tid_bitmap); 385 386 /* If the queue is still enabled - nothing left to do in this func */ 387 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 388 return 0; 389 390 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 391 cmd.tid = mvm->queue_info[queue].txq_tid; 392 393 /* Make sure queue info is correct even though we overwrite it */ 394 WARN(mvm->queue_info[queue].tid_bitmap, 395 "TXQ #%d info out-of-sync - tids=0x%x\n", 396 queue, mvm->queue_info[queue].tid_bitmap); 397 398 /* If we are here - the queue is freed and we can zero out these vals */ 399 mvm->queue_info[queue].tid_bitmap = 0; 400 401 if (sta) { 402 struct iwl_mvm_txq *mvmtxq = 403 iwl_mvm_txq_from_tid(sta, tid); 404 405 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 406 } 407 408 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 409 mvm->queue_info[queue].reserved = false; 410 411 iwl_trans_txq_disable(mvm->trans, queue, false); 412 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 413 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 414 415 if (ret) 416 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 417 queue, ret); 418 return ret; 419 } 420 421 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 422 { 423 struct ieee80211_sta *sta; 424 struct iwl_mvm_sta *mvmsta; 425 unsigned long tid_bitmap; 426 unsigned long agg_tids = 0; 427 u8 sta_id; 428 int tid; 429 430 lockdep_assert_held(&mvm->mutex); 431 432 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 433 return -EINVAL; 434 435 sta_id = mvm->queue_info[queue].ra_sta_id; 436 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 437 438 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 439 lockdep_is_held(&mvm->mutex)); 440 441 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 442 return -EINVAL; 443 444 mvmsta = iwl_mvm_sta_from_mac80211(sta); 445 446 spin_lock_bh(&mvmsta->lock); 447 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 448 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 449 agg_tids |= BIT(tid); 450 } 451 spin_unlock_bh(&mvmsta->lock); 452 453 return agg_tids; 454 } 455 456 /* 457 * Remove a queue from a station's resources. 458 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 459 * doesn't disable the queue 460 */ 461 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 462 { 463 struct ieee80211_sta *sta; 464 struct iwl_mvm_sta *mvmsta; 465 unsigned long tid_bitmap; 466 unsigned long disable_agg_tids = 0; 467 u8 sta_id; 468 int tid; 469 470 lockdep_assert_held(&mvm->mutex); 471 472 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 473 return -EINVAL; 474 475 sta_id = mvm->queue_info[queue].ra_sta_id; 476 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 477 478 rcu_read_lock(); 479 480 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 481 482 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 483 rcu_read_unlock(); 484 return 0; 485 } 486 487 mvmsta = iwl_mvm_sta_from_mac80211(sta); 488 489 spin_lock_bh(&mvmsta->lock); 490 /* Unmap MAC queues and TIDs from this queue */ 491 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 492 struct iwl_mvm_txq *mvmtxq = 493 iwl_mvm_txq_from_tid(sta, tid); 494 495 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 496 disable_agg_tids |= BIT(tid); 497 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 498 499 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 500 } 501 502 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 503 spin_unlock_bh(&mvmsta->lock); 504 505 rcu_read_unlock(); 506 507 /* 508 * The TX path may have been using this TXQ_ID from the tid_data, 509 * so make sure it's no longer running so that we can safely reuse 510 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 511 * above, but nothing guarantees we've stopped using them. Thus, 512 * without this, we could get to iwl_mvm_disable_txq() and remove 513 * the queue while still sending frames to it. 514 */ 515 synchronize_net(); 516 517 return disable_agg_tids; 518 } 519 520 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 521 struct ieee80211_sta *old_sta, 522 u8 new_sta_id) 523 { 524 struct iwl_mvm_sta *mvmsta; 525 u8 sta_id, tid; 526 unsigned long disable_agg_tids = 0; 527 bool same_sta; 528 int ret; 529 530 lockdep_assert_held(&mvm->mutex); 531 532 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 533 return -EINVAL; 534 535 sta_id = mvm->queue_info[queue].ra_sta_id; 536 tid = mvm->queue_info[queue].txq_tid; 537 538 same_sta = sta_id == new_sta_id; 539 540 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 541 if (WARN_ON(!mvmsta)) 542 return -EINVAL; 543 544 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 545 /* Disable the queue */ 546 if (disable_agg_tids) 547 iwl_mvm_invalidate_sta_queue(mvm, queue, 548 disable_agg_tids, false); 549 550 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 551 if (ret) { 552 IWL_ERR(mvm, 553 "Failed to free inactive queue %d (ret=%d)\n", 554 queue, ret); 555 556 return ret; 557 } 558 559 /* If TXQ is allocated to another STA, update removal in FW */ 560 if (!same_sta) 561 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 562 563 return 0; 564 } 565 566 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 567 unsigned long tfd_queue_mask, u8 ac) 568 { 569 int queue = 0; 570 u8 ac_to_queue[IEEE80211_NUM_ACS]; 571 int i; 572 573 /* 574 * This protects us against grabbing a queue that's being reconfigured 575 * by the inactivity checker. 576 */ 577 lockdep_assert_held(&mvm->mutex); 578 579 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 580 return -EINVAL; 581 582 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 583 584 /* See what ACs the existing queues for this STA have */ 585 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 586 /* Only DATA queues can be shared */ 587 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 588 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 589 continue; 590 591 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 592 } 593 594 /* 595 * The queue to share is chosen only from DATA queues as follows (in 596 * descending priority): 597 * 1. An AC_BE queue 598 * 2. Same AC queue 599 * 3. Highest AC queue that is lower than new AC 600 * 4. Any existing AC (there always is at least 1 DATA queue) 601 */ 602 603 /* Priority 1: An AC_BE queue */ 604 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 605 queue = ac_to_queue[IEEE80211_AC_BE]; 606 /* Priority 2: Same AC queue */ 607 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 608 queue = ac_to_queue[ac]; 609 /* Priority 3a: If new AC is VO and VI exists - use VI */ 610 else if (ac == IEEE80211_AC_VO && 611 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 612 queue = ac_to_queue[IEEE80211_AC_VI]; 613 /* Priority 3b: No BE so only AC less than the new one is BK */ 614 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 615 queue = ac_to_queue[IEEE80211_AC_BK]; 616 /* Priority 4a: No BE nor BK - use VI if exists */ 617 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 618 queue = ac_to_queue[IEEE80211_AC_VI]; 619 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 620 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 621 queue = ac_to_queue[IEEE80211_AC_VO]; 622 623 /* Make sure queue found (or not) is legal */ 624 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 625 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 626 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 627 IWL_ERR(mvm, "No DATA queues available to share\n"); 628 return -ENOSPC; 629 } 630 631 return queue; 632 } 633 634 /* 635 * If a given queue has a higher AC than the TID stream that is being compared 636 * to, the queue needs to be redirected to the lower AC. This function does that 637 * in such a case, otherwise - if no redirection required - it does nothing, 638 * unless the %force param is true. 639 */ 640 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 641 int ac, int ssn, unsigned int wdg_timeout, 642 bool force, struct iwl_mvm_txq *txq) 643 { 644 struct iwl_scd_txq_cfg_cmd cmd = { 645 .scd_queue = queue, 646 .action = SCD_CFG_DISABLE_QUEUE, 647 }; 648 bool shared_queue; 649 int ret; 650 651 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 652 return -EINVAL; 653 654 /* 655 * If the AC is lower than current one - FIFO needs to be redirected to 656 * the lowest one of the streams in the queue. Check if this is needed 657 * here. 658 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 659 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 660 * we need to check if the numerical value of X is LARGER than of Y. 661 */ 662 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 663 IWL_DEBUG_TX_QUEUES(mvm, 664 "No redirection needed on TXQ #%d\n", 665 queue); 666 return 0; 667 } 668 669 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 670 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 671 cmd.tid = mvm->queue_info[queue].txq_tid; 672 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 673 674 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 675 queue, iwl_mvm_ac_to_tx_fifo[ac]); 676 677 /* Stop the queue and wait for it to empty */ 678 txq->stopped = true; 679 680 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 681 if (ret) { 682 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 683 queue); 684 ret = -EIO; 685 goto out; 686 } 687 688 /* Before redirecting the queue we need to de-activate it */ 689 iwl_trans_txq_disable(mvm->trans, queue, false); 690 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 691 if (ret) 692 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 693 ret); 694 695 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 696 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 697 698 /* Update the TID "owner" of the queue */ 699 mvm->queue_info[queue].txq_tid = tid; 700 701 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 702 703 /* Redirect to lower AC */ 704 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 705 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 706 707 /* Update AC marking of the queue */ 708 mvm->queue_info[queue].mac80211_ac = ac; 709 710 /* 711 * Mark queue as shared in transport if shared 712 * Note this has to be done after queue enablement because enablement 713 * can also set this value, and there is no indication there to shared 714 * queues 715 */ 716 if (shared_queue) 717 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 718 719 out: 720 /* Continue using the queue */ 721 txq->stopped = false; 722 723 return ret; 724 } 725 726 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 727 u8 minq, u8 maxq) 728 { 729 int i; 730 731 lockdep_assert_held(&mvm->mutex); 732 733 /* This should not be hit with new TX path */ 734 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 735 return -ENOSPC; 736 737 /* Start by looking for a free queue */ 738 for (i = minq; i <= maxq; i++) 739 if (mvm->queue_info[i].tid_bitmap == 0 && 740 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 741 return i; 742 743 return -ENOSPC; 744 } 745 746 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 747 u8 sta_id, u8 tid, unsigned int timeout) 748 { 749 int queue, size = IWL_DEFAULT_QUEUE_SIZE; 750 751 if (tid == IWL_MAX_TID_COUNT) { 752 tid = IWL_MGMT_TID; 753 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 754 mvm->trans->cfg->min_txq_size); 755 } 756 queue = iwl_trans_txq_alloc(mvm->trans, 757 cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE), 758 sta_id, tid, SCD_QUEUE_CFG, size, timeout); 759 760 if (queue < 0) { 761 IWL_DEBUG_TX_QUEUES(mvm, 762 "Failed allocating TXQ for sta %d tid %d, ret: %d\n", 763 sta_id, tid, queue); 764 return queue; 765 } 766 767 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 768 queue, sta_id, tid); 769 770 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue); 771 772 return queue; 773 } 774 775 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 776 struct ieee80211_sta *sta, u8 ac, 777 int tid) 778 { 779 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 780 struct iwl_mvm_txq *mvmtxq = 781 iwl_mvm_txq_from_tid(sta, tid); 782 unsigned int wdg_timeout = 783 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 784 int queue = -1; 785 786 lockdep_assert_held(&mvm->mutex); 787 788 IWL_DEBUG_TX_QUEUES(mvm, 789 "Allocating queue for sta %d on tid %d\n", 790 mvmsta->sta_id, tid); 791 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 792 if (queue < 0) 793 return queue; 794 795 mvmtxq->txq_id = queue; 796 mvm->tvqm_info[queue].txq_tid = tid; 797 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 798 799 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 800 801 spin_lock_bh(&mvmsta->lock); 802 mvmsta->tid_data[tid].txq_id = queue; 803 spin_unlock_bh(&mvmsta->lock); 804 805 return 0; 806 } 807 808 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 809 struct ieee80211_sta *sta, 810 int queue, u8 sta_id, u8 tid) 811 { 812 bool enable_queue = true; 813 814 /* Make sure this TID isn't already enabled */ 815 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 816 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 817 queue, tid); 818 return false; 819 } 820 821 /* Update mappings and refcounts */ 822 if (mvm->queue_info[queue].tid_bitmap) 823 enable_queue = false; 824 825 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 826 mvm->queue_info[queue].ra_sta_id = sta_id; 827 828 if (enable_queue) { 829 if (tid != IWL_MAX_TID_COUNT) 830 mvm->queue_info[queue].mac80211_ac = 831 tid_to_mac80211_ac[tid]; 832 else 833 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 834 835 mvm->queue_info[queue].txq_tid = tid; 836 } 837 838 if (sta) { 839 struct iwl_mvm_txq *mvmtxq = 840 iwl_mvm_txq_from_tid(sta, tid); 841 842 mvmtxq->txq_id = queue; 843 } 844 845 IWL_DEBUG_TX_QUEUES(mvm, 846 "Enabling TXQ #%d tids=0x%x\n", 847 queue, mvm->queue_info[queue].tid_bitmap); 848 849 return enable_queue; 850 } 851 852 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 853 int queue, u16 ssn, 854 const struct iwl_trans_txq_scd_cfg *cfg, 855 unsigned int wdg_timeout) 856 { 857 struct iwl_scd_txq_cfg_cmd cmd = { 858 .scd_queue = queue, 859 .action = SCD_CFG_ENABLE_QUEUE, 860 .window = cfg->frame_limit, 861 .sta_id = cfg->sta_id, 862 .ssn = cpu_to_le16(ssn), 863 .tx_fifo = cfg->fifo, 864 .aggregate = cfg->aggregate, 865 .tid = cfg->tid, 866 }; 867 bool inc_ssn; 868 869 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 870 return false; 871 872 /* Send the enabling command if we need to */ 873 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 874 return false; 875 876 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 877 NULL, wdg_timeout); 878 if (inc_ssn) 879 le16_add_cpu(&cmd.ssn, 1); 880 881 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 882 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 883 884 return inc_ssn; 885 } 886 887 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 888 { 889 struct iwl_scd_txq_cfg_cmd cmd = { 890 .scd_queue = queue, 891 .action = SCD_CFG_UPDATE_QUEUE_TID, 892 }; 893 int tid; 894 unsigned long tid_bitmap; 895 int ret; 896 897 lockdep_assert_held(&mvm->mutex); 898 899 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 900 return; 901 902 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 903 904 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 905 return; 906 907 /* Find any TID for queue */ 908 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 909 cmd.tid = tid; 910 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 911 912 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 913 if (ret) { 914 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 915 queue, ret); 916 return; 917 } 918 919 mvm->queue_info[queue].txq_tid = tid; 920 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 921 queue, tid); 922 } 923 924 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 925 { 926 struct ieee80211_sta *sta; 927 struct iwl_mvm_sta *mvmsta; 928 u8 sta_id; 929 int tid = -1; 930 unsigned long tid_bitmap; 931 unsigned int wdg_timeout; 932 int ssn; 933 int ret = true; 934 935 /* queue sharing is disabled on new TX path */ 936 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 937 return; 938 939 lockdep_assert_held(&mvm->mutex); 940 941 sta_id = mvm->queue_info[queue].ra_sta_id; 942 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 943 944 /* Find TID for queue, and make sure it is the only one on the queue */ 945 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 946 if (tid_bitmap != BIT(tid)) { 947 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 948 queue, tid_bitmap); 949 return; 950 } 951 952 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 953 tid); 954 955 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 956 lockdep_is_held(&mvm->mutex)); 957 958 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 959 return; 960 961 mvmsta = iwl_mvm_sta_from_mac80211(sta); 962 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 963 964 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 965 966 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 967 tid_to_mac80211_ac[tid], ssn, 968 wdg_timeout, true, 969 iwl_mvm_txq_from_tid(sta, tid)); 970 if (ret) { 971 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 972 return; 973 } 974 975 /* If aggs should be turned back on - do it */ 976 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 977 struct iwl_mvm_add_sta_cmd cmd = {0}; 978 979 mvmsta->tid_disable_agg &= ~BIT(tid); 980 981 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 982 cmd.sta_id = mvmsta->sta_id; 983 cmd.add_modify = STA_MODE_MODIFY; 984 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 985 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 986 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 987 988 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 989 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 990 if (!ret) { 991 IWL_DEBUG_TX_QUEUES(mvm, 992 "TXQ #%d is now aggregated again\n", 993 queue); 994 995 /* Mark queue intenally as aggregating again */ 996 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 997 } 998 } 999 1000 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1001 } 1002 1003 /* 1004 * Remove inactive TIDs of a given queue. 1005 * If all queue TIDs are inactive - mark the queue as inactive 1006 * If only some the queue TIDs are inactive - unmap them from the queue 1007 * 1008 * Returns %true if all TIDs were removed and the queue could be reused. 1009 */ 1010 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1011 struct iwl_mvm_sta *mvmsta, int queue, 1012 unsigned long tid_bitmap, 1013 unsigned long *unshare_queues, 1014 unsigned long *changetid_queues) 1015 { 1016 int tid; 1017 1018 lockdep_assert_held(&mvmsta->lock); 1019 lockdep_assert_held(&mvm->mutex); 1020 1021 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1022 return false; 1023 1024 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1025 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1026 /* If some TFDs are still queued - don't mark TID as inactive */ 1027 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1028 tid_bitmap &= ~BIT(tid); 1029 1030 /* Don't mark as inactive any TID that has an active BA */ 1031 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1032 tid_bitmap &= ~BIT(tid); 1033 } 1034 1035 /* If all TIDs in the queue are inactive - return it can be reused */ 1036 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1037 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1038 return true; 1039 } 1040 1041 /* 1042 * If we are here, this is a shared queue and not all TIDs timed-out. 1043 * Remove the ones that did. 1044 */ 1045 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1046 u16 tid_bitmap; 1047 1048 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1049 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1050 1051 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1052 1053 /* 1054 * We need to take into account a situation in which a TXQ was 1055 * allocated to TID x, and then turned shared by adding TIDs y 1056 * and z. If TID x becomes inactive and is removed from the TXQ, 1057 * ownership must be given to one of the remaining TIDs. 1058 * This is mainly because if TID x continues - a new queue can't 1059 * be allocated for it as long as it is an owner of another TXQ. 1060 * 1061 * Mark this queue in the right bitmap, we'll send the command 1062 * to the firmware later. 1063 */ 1064 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1065 set_bit(queue, changetid_queues); 1066 1067 IWL_DEBUG_TX_QUEUES(mvm, 1068 "Removing inactive TID %d from shared Q:%d\n", 1069 tid, queue); 1070 } 1071 1072 IWL_DEBUG_TX_QUEUES(mvm, 1073 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1074 mvm->queue_info[queue].tid_bitmap); 1075 1076 /* 1077 * There may be different TIDs with the same mac queues, so make 1078 * sure all TIDs have existing corresponding mac queues enabled 1079 */ 1080 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1081 1082 /* If the queue is marked as shared - "unshare" it */ 1083 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1084 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1085 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1086 queue); 1087 set_bit(queue, unshare_queues); 1088 } 1089 1090 return false; 1091 } 1092 1093 /* 1094 * Check for inactivity - this includes checking if any queue 1095 * can be unshared and finding one (and only one) that can be 1096 * reused. 1097 * This function is also invoked as a sort of clean-up task, 1098 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1099 * 1100 * Returns the queue number, or -ENOSPC. 1101 */ 1102 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1103 { 1104 unsigned long now = jiffies; 1105 unsigned long unshare_queues = 0; 1106 unsigned long changetid_queues = 0; 1107 int i, ret, free_queue = -ENOSPC; 1108 struct ieee80211_sta *queue_owner = NULL; 1109 1110 lockdep_assert_held(&mvm->mutex); 1111 1112 if (iwl_mvm_has_new_tx_api(mvm)) 1113 return -ENOSPC; 1114 1115 rcu_read_lock(); 1116 1117 /* we skip the CMD queue below by starting at 1 */ 1118 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1119 1120 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1121 struct ieee80211_sta *sta; 1122 struct iwl_mvm_sta *mvmsta; 1123 u8 sta_id; 1124 int tid; 1125 unsigned long inactive_tid_bitmap = 0; 1126 unsigned long queue_tid_bitmap; 1127 1128 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1129 if (!queue_tid_bitmap) 1130 continue; 1131 1132 /* If TXQ isn't in active use anyway - nothing to do here... */ 1133 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1134 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1135 continue; 1136 1137 /* Check to see if there are inactive TIDs on this queue */ 1138 for_each_set_bit(tid, &queue_tid_bitmap, 1139 IWL_MAX_TID_COUNT + 1) { 1140 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1141 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1142 continue; 1143 1144 inactive_tid_bitmap |= BIT(tid); 1145 } 1146 1147 /* If all TIDs are active - finish check on this queue */ 1148 if (!inactive_tid_bitmap) 1149 continue; 1150 1151 /* 1152 * If we are here - the queue hadn't been served recently and is 1153 * in use 1154 */ 1155 1156 sta_id = mvm->queue_info[i].ra_sta_id; 1157 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1158 1159 /* 1160 * If the STA doesn't exist anymore, it isn't an error. It could 1161 * be that it was removed since getting the queues, and in this 1162 * case it should've inactivated its queues anyway. 1163 */ 1164 if (IS_ERR_OR_NULL(sta)) 1165 continue; 1166 1167 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1168 1169 spin_lock_bh(&mvmsta->lock); 1170 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1171 inactive_tid_bitmap, 1172 &unshare_queues, 1173 &changetid_queues); 1174 if (ret >= 0 && free_queue < 0) { 1175 queue_owner = sta; 1176 free_queue = ret; 1177 } 1178 /* only unlock sta lock - we still need the queue info lock */ 1179 spin_unlock_bh(&mvmsta->lock); 1180 } 1181 1182 1183 /* Reconfigure queues requiring reconfiguation */ 1184 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1185 iwl_mvm_unshare_queue(mvm, i); 1186 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1187 iwl_mvm_change_queue_tid(mvm, i); 1188 1189 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1190 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1191 alloc_for_sta); 1192 if (ret) { 1193 rcu_read_unlock(); 1194 return ret; 1195 } 1196 } 1197 1198 rcu_read_unlock(); 1199 1200 return free_queue; 1201 } 1202 1203 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1204 struct ieee80211_sta *sta, u8 ac, int tid) 1205 { 1206 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1207 struct iwl_trans_txq_scd_cfg cfg = { 1208 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1209 .sta_id = mvmsta->sta_id, 1210 .tid = tid, 1211 .frame_limit = IWL_FRAME_LIMIT, 1212 }; 1213 unsigned int wdg_timeout = 1214 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1215 int queue = -1; 1216 unsigned long disable_agg_tids = 0; 1217 enum iwl_mvm_agg_state queue_state; 1218 bool shared_queue = false, inc_ssn; 1219 int ssn; 1220 unsigned long tfd_queue_mask; 1221 int ret; 1222 1223 lockdep_assert_held(&mvm->mutex); 1224 1225 if (iwl_mvm_has_new_tx_api(mvm)) 1226 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1227 1228 spin_lock_bh(&mvmsta->lock); 1229 tfd_queue_mask = mvmsta->tfd_queue_msk; 1230 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1231 spin_unlock_bh(&mvmsta->lock); 1232 1233 if (tid == IWL_MAX_TID_COUNT) { 1234 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1235 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1236 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1237 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1238 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1239 queue); 1240 1241 /* If no such queue is found, we'll use a DATA queue instead */ 1242 } 1243 1244 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1245 (mvm->queue_info[mvmsta->reserved_queue].status == 1246 IWL_MVM_QUEUE_RESERVED)) { 1247 queue = mvmsta->reserved_queue; 1248 mvm->queue_info[queue].reserved = true; 1249 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1250 } 1251 1252 if (queue < 0) 1253 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1254 IWL_MVM_DQA_MIN_DATA_QUEUE, 1255 IWL_MVM_DQA_MAX_DATA_QUEUE); 1256 if (queue < 0) { 1257 /* try harder - perhaps kill an inactive queue */ 1258 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1259 } 1260 1261 /* No free queue - we'll have to share */ 1262 if (queue <= 0) { 1263 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1264 if (queue > 0) { 1265 shared_queue = true; 1266 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1267 } 1268 } 1269 1270 /* 1271 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1272 * to make sure no one else takes it. 1273 * This will allow avoiding re-acquiring the lock at the end of the 1274 * configuration. On error we'll mark it back as free. 1275 */ 1276 if (queue > 0 && !shared_queue) 1277 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1278 1279 /* This shouldn't happen - out of queues */ 1280 if (WARN_ON(queue <= 0)) { 1281 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1282 tid, cfg.sta_id); 1283 return queue; 1284 } 1285 1286 /* 1287 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1288 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1289 * as aggregatable. 1290 * Mark all DATA queues as allowing to be aggregated at some point 1291 */ 1292 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1293 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1294 1295 IWL_DEBUG_TX_QUEUES(mvm, 1296 "Allocating %squeue #%d to sta %d on tid %d\n", 1297 shared_queue ? "shared " : "", queue, 1298 mvmsta->sta_id, tid); 1299 1300 if (shared_queue) { 1301 /* Disable any open aggs on this queue */ 1302 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1303 1304 if (disable_agg_tids) { 1305 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1306 queue); 1307 iwl_mvm_invalidate_sta_queue(mvm, queue, 1308 disable_agg_tids, false); 1309 } 1310 } 1311 1312 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1313 1314 /* 1315 * Mark queue as shared in transport if shared 1316 * Note this has to be done after queue enablement because enablement 1317 * can also set this value, and there is no indication there to shared 1318 * queues 1319 */ 1320 if (shared_queue) 1321 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1322 1323 spin_lock_bh(&mvmsta->lock); 1324 /* 1325 * This looks racy, but it is not. We have only one packet for 1326 * this ra/tid in our Tx path since we stop the Qdisc when we 1327 * need to allocate a new TFD queue. 1328 */ 1329 if (inc_ssn) { 1330 mvmsta->tid_data[tid].seq_number += 0x10; 1331 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1332 } 1333 mvmsta->tid_data[tid].txq_id = queue; 1334 mvmsta->tfd_queue_msk |= BIT(queue); 1335 queue_state = mvmsta->tid_data[tid].state; 1336 1337 if (mvmsta->reserved_queue == queue) 1338 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1339 spin_unlock_bh(&mvmsta->lock); 1340 1341 if (!shared_queue) { 1342 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1343 if (ret) 1344 goto out_err; 1345 1346 /* If we need to re-enable aggregations... */ 1347 if (queue_state == IWL_AGG_ON) { 1348 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1349 if (ret) 1350 goto out_err; 1351 } 1352 } else { 1353 /* Redirect queue, if needed */ 1354 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1355 wdg_timeout, false, 1356 iwl_mvm_txq_from_tid(sta, tid)); 1357 if (ret) 1358 goto out_err; 1359 } 1360 1361 return 0; 1362 1363 out_err: 1364 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1365 1366 return ret; 1367 } 1368 1369 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1370 { 1371 if (tid == IWL_MAX_TID_COUNT) 1372 return IEEE80211_AC_VO; /* MGMT */ 1373 1374 return tid_to_mac80211_ac[tid]; 1375 } 1376 1377 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1378 { 1379 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1380 add_stream_wk); 1381 1382 mutex_lock(&mvm->mutex); 1383 1384 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1385 1386 while (!list_empty(&mvm->add_stream_txqs)) { 1387 struct iwl_mvm_txq *mvmtxq; 1388 struct ieee80211_txq *txq; 1389 u8 tid; 1390 1391 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1392 struct iwl_mvm_txq, list); 1393 1394 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1395 drv_priv); 1396 tid = txq->tid; 1397 if (tid == IEEE80211_NUM_TIDS) 1398 tid = IWL_MAX_TID_COUNT; 1399 1400 iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid); 1401 list_del_init(&mvmtxq->list); 1402 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1403 } 1404 1405 mutex_unlock(&mvm->mutex); 1406 } 1407 1408 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1409 struct ieee80211_sta *sta, 1410 enum nl80211_iftype vif_type) 1411 { 1412 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1413 int queue; 1414 1415 /* queue reserving is disabled on new TX path */ 1416 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1417 return 0; 1418 1419 /* run the general cleanup/unsharing of queues */ 1420 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1421 1422 /* Make sure we have free resources for this STA */ 1423 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1424 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1425 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1426 IWL_MVM_QUEUE_FREE)) 1427 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1428 else 1429 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1430 IWL_MVM_DQA_MIN_DATA_QUEUE, 1431 IWL_MVM_DQA_MAX_DATA_QUEUE); 1432 if (queue < 0) { 1433 /* try again - this time kick out a queue if needed */ 1434 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1435 if (queue < 0) { 1436 IWL_ERR(mvm, "No available queues for new station\n"); 1437 return -ENOSPC; 1438 } 1439 } 1440 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1441 1442 mvmsta->reserved_queue = queue; 1443 1444 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1445 queue, mvmsta->sta_id); 1446 1447 return 0; 1448 } 1449 1450 /* 1451 * In DQA mode, after a HW restart the queues should be allocated as before, in 1452 * order to avoid race conditions when there are shared queues. This function 1453 * does the re-mapping and queue allocation. 1454 * 1455 * Note that re-enabling aggregations isn't done in this function. 1456 */ 1457 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1458 struct ieee80211_sta *sta) 1459 { 1460 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1461 unsigned int wdg = 1462 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1463 int i; 1464 struct iwl_trans_txq_scd_cfg cfg = { 1465 .sta_id = mvm_sta->sta_id, 1466 .frame_limit = IWL_FRAME_LIMIT, 1467 }; 1468 1469 /* Make sure reserved queue is still marked as such (if allocated) */ 1470 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1471 mvm->queue_info[mvm_sta->reserved_queue].status = 1472 IWL_MVM_QUEUE_RESERVED; 1473 1474 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1475 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1476 int txq_id = tid_data->txq_id; 1477 int ac; 1478 1479 if (txq_id == IWL_MVM_INVALID_QUEUE) 1480 continue; 1481 1482 ac = tid_to_mac80211_ac[i]; 1483 1484 if (iwl_mvm_has_new_tx_api(mvm)) { 1485 IWL_DEBUG_TX_QUEUES(mvm, 1486 "Re-mapping sta %d tid %d\n", 1487 mvm_sta->sta_id, i); 1488 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1489 i, wdg); 1490 tid_data->txq_id = txq_id; 1491 1492 /* 1493 * Since we don't set the seq number after reset, and HW 1494 * sets it now, FW reset will cause the seq num to start 1495 * at 0 again, so driver will need to update it 1496 * internally as well, so it keeps in sync with real val 1497 */ 1498 tid_data->seq_number = 0; 1499 } else { 1500 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1501 1502 cfg.tid = i; 1503 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1504 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1505 txq_id == 1506 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1507 1508 IWL_DEBUG_TX_QUEUES(mvm, 1509 "Re-mapping sta %d tid %d to queue %d\n", 1510 mvm_sta->sta_id, i, txq_id); 1511 1512 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1513 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1514 } 1515 } 1516 } 1517 1518 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1519 struct iwl_mvm_int_sta *sta, 1520 const u8 *addr, 1521 u16 mac_id, u16 color) 1522 { 1523 struct iwl_mvm_add_sta_cmd cmd; 1524 int ret; 1525 u32 status = ADD_STA_SUCCESS; 1526 1527 lockdep_assert_held(&mvm->mutex); 1528 1529 memset(&cmd, 0, sizeof(cmd)); 1530 cmd.sta_id = sta->sta_id; 1531 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1532 color)); 1533 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1534 cmd.station_type = sta->type; 1535 1536 if (!iwl_mvm_has_new_tx_api(mvm)) 1537 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1538 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1539 1540 if (addr) 1541 memcpy(cmd.addr, addr, ETH_ALEN); 1542 1543 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1544 iwl_mvm_add_sta_cmd_size(mvm), 1545 &cmd, &status); 1546 if (ret) 1547 return ret; 1548 1549 switch (status & IWL_ADD_STA_STATUS_MASK) { 1550 case ADD_STA_SUCCESS: 1551 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1552 return 0; 1553 default: 1554 ret = -EIO; 1555 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1556 status); 1557 break; 1558 } 1559 return ret; 1560 } 1561 1562 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1563 struct ieee80211_vif *vif, 1564 struct ieee80211_sta *sta) 1565 { 1566 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1567 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1568 struct iwl_mvm_rxq_dup_data *dup_data; 1569 int i, ret, sta_id; 1570 bool sta_update = false; 1571 unsigned int sta_flags = 0; 1572 1573 lockdep_assert_held(&mvm->mutex); 1574 1575 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1576 sta_id = iwl_mvm_find_free_sta_id(mvm, 1577 ieee80211_vif_type_p2p(vif)); 1578 else 1579 sta_id = mvm_sta->sta_id; 1580 1581 if (sta_id == IWL_MVM_INVALID_STA) 1582 return -ENOSPC; 1583 1584 spin_lock_init(&mvm_sta->lock); 1585 1586 /* if this is a HW restart re-alloc existing queues */ 1587 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1588 struct iwl_mvm_int_sta tmp_sta = { 1589 .sta_id = sta_id, 1590 .type = mvm_sta->sta_type, 1591 }; 1592 1593 /* 1594 * First add an empty station since allocating 1595 * a queue requires a valid station 1596 */ 1597 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1598 mvmvif->id, mvmvif->color); 1599 if (ret) 1600 goto err; 1601 1602 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1603 sta_update = true; 1604 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1605 goto update_fw; 1606 } 1607 1608 mvm_sta->sta_id = sta_id; 1609 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1610 mvmvif->color); 1611 mvm_sta->vif = vif; 1612 if (!mvm->trans->cfg->gen2) 1613 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1614 else 1615 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1616 mvm_sta->tx_protection = 0; 1617 mvm_sta->tt_tx_protection = false; 1618 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1619 1620 /* HW restart, don't assume the memory has been zeroed */ 1621 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1622 mvm_sta->tfd_queue_msk = 0; 1623 1624 /* for HW restart - reset everything but the sequence number */ 1625 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1626 u16 seq = mvm_sta->tid_data[i].seq_number; 1627 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1628 mvm_sta->tid_data[i].seq_number = seq; 1629 1630 /* 1631 * Mark all queues for this STA as unallocated and defer TX 1632 * frames until the queue is allocated 1633 */ 1634 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1635 } 1636 1637 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1638 struct iwl_mvm_txq *mvmtxq = 1639 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1640 1641 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1642 INIT_LIST_HEAD(&mvmtxq->list); 1643 atomic_set(&mvmtxq->tx_request, 0); 1644 } 1645 1646 mvm_sta->agg_tids = 0; 1647 1648 if (iwl_mvm_has_new_rx_api(mvm) && 1649 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1650 int q; 1651 1652 dup_data = kcalloc(mvm->trans->num_rx_queues, 1653 sizeof(*dup_data), GFP_KERNEL); 1654 if (!dup_data) 1655 return -ENOMEM; 1656 /* 1657 * Initialize all the last_seq values to 0xffff which can never 1658 * compare equal to the frame's seq_ctrl in the check in 1659 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1660 * number and fragmented packets don't reach that function. 1661 * 1662 * This thus allows receiving a packet with seqno 0 and the 1663 * retry bit set as the very first packet on a new TID. 1664 */ 1665 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1666 memset(dup_data[q].last_seq, 0xff, 1667 sizeof(dup_data[q].last_seq)); 1668 mvm_sta->dup_data = dup_data; 1669 } 1670 1671 if (!iwl_mvm_has_new_tx_api(mvm)) { 1672 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1673 ieee80211_vif_type_p2p(vif)); 1674 if (ret) 1675 goto err; 1676 } 1677 1678 /* 1679 * if rs is registered with mac80211, then "add station" will be handled 1680 * via the corresponding ops, otherwise need to notify rate scaling here 1681 */ 1682 if (iwl_mvm_has_tlc_offload(mvm)) 1683 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1684 1685 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1686 1687 update_fw: 1688 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1689 if (ret) 1690 goto err; 1691 1692 if (vif->type == NL80211_IFTYPE_STATION) { 1693 if (!sta->tdls) { 1694 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1695 mvmvif->ap_sta_id = sta_id; 1696 } else { 1697 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1698 } 1699 } 1700 1701 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1702 1703 return 0; 1704 1705 err: 1706 return ret; 1707 } 1708 1709 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1710 bool drain) 1711 { 1712 struct iwl_mvm_add_sta_cmd cmd = {}; 1713 int ret; 1714 u32 status; 1715 1716 lockdep_assert_held(&mvm->mutex); 1717 1718 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1719 cmd.sta_id = mvmsta->sta_id; 1720 cmd.add_modify = STA_MODE_MODIFY; 1721 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1722 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1723 1724 status = ADD_STA_SUCCESS; 1725 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1726 iwl_mvm_add_sta_cmd_size(mvm), 1727 &cmd, &status); 1728 if (ret) 1729 return ret; 1730 1731 switch (status & IWL_ADD_STA_STATUS_MASK) { 1732 case ADD_STA_SUCCESS: 1733 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1734 mvmsta->sta_id); 1735 break; 1736 default: 1737 ret = -EIO; 1738 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1739 mvmsta->sta_id); 1740 break; 1741 } 1742 1743 return ret; 1744 } 1745 1746 /* 1747 * Remove a station from the FW table. Before sending the command to remove 1748 * the station validate that the station is indeed known to the driver (sanity 1749 * only). 1750 */ 1751 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1752 { 1753 struct ieee80211_sta *sta; 1754 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1755 .sta_id = sta_id, 1756 }; 1757 int ret; 1758 1759 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1760 lockdep_is_held(&mvm->mutex)); 1761 1762 /* Note: internal stations are marked as error values */ 1763 if (!sta) { 1764 IWL_ERR(mvm, "Invalid station id\n"); 1765 return -EINVAL; 1766 } 1767 1768 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1769 sizeof(rm_sta_cmd), &rm_sta_cmd); 1770 if (ret) { 1771 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1772 return ret; 1773 } 1774 1775 return 0; 1776 } 1777 1778 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1779 struct ieee80211_vif *vif, 1780 struct ieee80211_sta *sta) 1781 { 1782 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1783 int i; 1784 1785 lockdep_assert_held(&mvm->mutex); 1786 1787 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1788 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1789 continue; 1790 1791 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1792 0); 1793 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1794 } 1795 1796 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1797 struct iwl_mvm_txq *mvmtxq = 1798 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1799 1800 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1801 } 1802 } 1803 1804 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1805 struct iwl_mvm_sta *mvm_sta) 1806 { 1807 int i; 1808 1809 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1810 u16 txq_id; 1811 int ret; 1812 1813 spin_lock_bh(&mvm_sta->lock); 1814 txq_id = mvm_sta->tid_data[i].txq_id; 1815 spin_unlock_bh(&mvm_sta->lock); 1816 1817 if (txq_id == IWL_MVM_INVALID_QUEUE) 1818 continue; 1819 1820 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1821 if (ret) 1822 return ret; 1823 } 1824 1825 return 0; 1826 } 1827 1828 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1829 struct ieee80211_vif *vif, 1830 struct ieee80211_sta *sta) 1831 { 1832 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1833 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1834 u8 sta_id = mvm_sta->sta_id; 1835 int ret; 1836 1837 lockdep_assert_held(&mvm->mutex); 1838 1839 if (iwl_mvm_has_new_rx_api(mvm)) 1840 kfree(mvm_sta->dup_data); 1841 1842 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1843 if (ret) 1844 return ret; 1845 1846 /* flush its queues here since we are freeing mvm_sta */ 1847 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1848 if (ret) 1849 return ret; 1850 if (iwl_mvm_has_new_tx_api(mvm)) { 1851 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1852 } else { 1853 u32 q_mask = mvm_sta->tfd_queue_msk; 1854 1855 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1856 q_mask); 1857 } 1858 if (ret) 1859 return ret; 1860 1861 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1862 1863 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1864 1865 /* If there is a TXQ still marked as reserved - free it */ 1866 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1867 u8 reserved_txq = mvm_sta->reserved_queue; 1868 enum iwl_mvm_queue_status *status; 1869 1870 /* 1871 * If no traffic has gone through the reserved TXQ - it 1872 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1873 * should be manually marked as free again 1874 */ 1875 status = &mvm->queue_info[reserved_txq].status; 1876 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1877 (*status != IWL_MVM_QUEUE_FREE), 1878 "sta_id %d reserved txq %d status %d", 1879 sta_id, reserved_txq, *status)) 1880 return -EINVAL; 1881 1882 *status = IWL_MVM_QUEUE_FREE; 1883 } 1884 1885 if (vif->type == NL80211_IFTYPE_STATION && 1886 mvmvif->ap_sta_id == sta_id) { 1887 /* if associated - we can't remove the AP STA now */ 1888 if (vif->bss_conf.assoc) 1889 return ret; 1890 1891 /* unassoc - go ahead - remove the AP STA now */ 1892 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1893 1894 /* clear d0i3_ap_sta_id if no longer relevant */ 1895 if (mvm->d0i3_ap_sta_id == sta_id) 1896 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1897 } 1898 1899 /* 1900 * This shouldn't happen - the TDLS channel switch should be canceled 1901 * before the STA is removed. 1902 */ 1903 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1904 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1905 cancel_delayed_work(&mvm->tdls_cs.dwork); 1906 } 1907 1908 /* 1909 * Make sure that the tx response code sees the station as -EBUSY and 1910 * calls the drain worker. 1911 */ 1912 spin_lock_bh(&mvm_sta->lock); 1913 spin_unlock_bh(&mvm_sta->lock); 1914 1915 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1916 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1917 1918 return ret; 1919 } 1920 1921 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1922 struct ieee80211_vif *vif, 1923 u8 sta_id) 1924 { 1925 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1926 1927 lockdep_assert_held(&mvm->mutex); 1928 1929 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1930 return ret; 1931 } 1932 1933 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1934 struct iwl_mvm_int_sta *sta, 1935 u32 qmask, enum nl80211_iftype iftype, 1936 enum iwl_sta_type type) 1937 { 1938 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1939 sta->sta_id == IWL_MVM_INVALID_STA) { 1940 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1941 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1942 return -ENOSPC; 1943 } 1944 1945 sta->tfd_queue_msk = qmask; 1946 sta->type = type; 1947 1948 /* put a non-NULL value so iterating over the stations won't stop */ 1949 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1950 return 0; 1951 } 1952 1953 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1954 { 1955 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1956 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1957 sta->sta_id = IWL_MVM_INVALID_STA; 1958 } 1959 1960 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1961 u8 sta_id, u8 fifo) 1962 { 1963 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1964 mvm->cfg->base_params->wd_timeout : 1965 IWL_WATCHDOG_DISABLED; 1966 1967 if (iwl_mvm_has_new_tx_api(mvm)) { 1968 int tvqm_queue = 1969 iwl_mvm_tvqm_enable_txq(mvm, sta_id, 1970 IWL_MAX_TID_COUNT, 1971 wdg_timeout); 1972 *queue = tvqm_queue; 1973 } else { 1974 struct iwl_trans_txq_scd_cfg cfg = { 1975 .fifo = fifo, 1976 .sta_id = sta_id, 1977 .tid = IWL_MAX_TID_COUNT, 1978 .aggregate = false, 1979 .frame_limit = IWL_FRAME_LIMIT, 1980 }; 1981 1982 iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout); 1983 } 1984 } 1985 1986 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1987 { 1988 int ret; 1989 1990 lockdep_assert_held(&mvm->mutex); 1991 1992 /* Allocate aux station and assign to it the aux queue */ 1993 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1994 NL80211_IFTYPE_UNSPECIFIED, 1995 IWL_STA_AUX_ACTIVITY); 1996 if (ret) 1997 return ret; 1998 1999 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 2000 if (!iwl_mvm_has_new_tx_api(mvm)) 2001 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2002 mvm->aux_sta.sta_id, 2003 IWL_MVM_TX_FIFO_MCAST); 2004 2005 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 2006 MAC_INDEX_AUX, 0); 2007 if (ret) { 2008 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2009 return ret; 2010 } 2011 2012 /* 2013 * For 22000 firmware and on we cannot add queue to a station unknown 2014 * to firmware so enable queue here - after the station was added 2015 */ 2016 if (iwl_mvm_has_new_tx_api(mvm)) 2017 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2018 mvm->aux_sta.sta_id, 2019 IWL_MVM_TX_FIFO_MCAST); 2020 2021 return 0; 2022 } 2023 2024 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2025 { 2026 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2027 int ret; 2028 2029 lockdep_assert_held(&mvm->mutex); 2030 2031 /* Map snif queue to fifo - must happen before adding snif station */ 2032 if (!iwl_mvm_has_new_tx_api(mvm)) 2033 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2034 mvm->snif_sta.sta_id, 2035 IWL_MVM_TX_FIFO_BE); 2036 2037 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 2038 mvmvif->id, 0); 2039 if (ret) 2040 return ret; 2041 2042 /* 2043 * For 22000 firmware and on we cannot add queue to a station unknown 2044 * to firmware so enable queue here - after the station was added 2045 */ 2046 if (iwl_mvm_has_new_tx_api(mvm)) 2047 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2048 mvm->snif_sta.sta_id, 2049 IWL_MVM_TX_FIFO_BE); 2050 2051 return 0; 2052 } 2053 2054 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2055 { 2056 int ret; 2057 2058 lockdep_assert_held(&mvm->mutex); 2059 2060 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2061 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2062 if (ret) 2063 IWL_WARN(mvm, "Failed sending remove station\n"); 2064 2065 return ret; 2066 } 2067 2068 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2069 { 2070 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2071 } 2072 2073 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 2074 { 2075 lockdep_assert_held(&mvm->mutex); 2076 2077 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2078 } 2079 2080 /* 2081 * Send the add station command for the vif's broadcast station. 2082 * Assumes that the station was already allocated. 2083 * 2084 * @mvm: the mvm component 2085 * @vif: the interface to which the broadcast station is added 2086 * @bsta: the broadcast station to add. 2087 */ 2088 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2089 { 2090 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2091 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2092 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2093 const u8 *baddr = _baddr; 2094 int queue; 2095 int ret; 2096 unsigned int wdg_timeout = 2097 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2098 struct iwl_trans_txq_scd_cfg cfg = { 2099 .fifo = IWL_MVM_TX_FIFO_VO, 2100 .sta_id = mvmvif->bcast_sta.sta_id, 2101 .tid = IWL_MAX_TID_COUNT, 2102 .aggregate = false, 2103 .frame_limit = IWL_FRAME_LIMIT, 2104 }; 2105 2106 lockdep_assert_held(&mvm->mutex); 2107 2108 if (!iwl_mvm_has_new_tx_api(mvm)) { 2109 if (vif->type == NL80211_IFTYPE_AP || 2110 vif->type == NL80211_IFTYPE_ADHOC) 2111 queue = mvm->probe_queue; 2112 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2113 queue = mvm->p2p_dev_queue; 2114 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 2115 return -EINVAL; 2116 2117 bsta->tfd_queue_msk |= BIT(queue); 2118 2119 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2120 } 2121 2122 if (vif->type == NL80211_IFTYPE_ADHOC) 2123 baddr = vif->bss_conf.bssid; 2124 2125 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2126 return -ENOSPC; 2127 2128 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2129 mvmvif->id, mvmvif->color); 2130 if (ret) 2131 return ret; 2132 2133 /* 2134 * For 22000 firmware and on we cannot add queue to a station unknown 2135 * to firmware so enable queue here - after the station was added 2136 */ 2137 if (iwl_mvm_has_new_tx_api(mvm)) { 2138 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2139 IWL_MAX_TID_COUNT, 2140 wdg_timeout); 2141 2142 if (vif->type == NL80211_IFTYPE_AP || 2143 vif->type == NL80211_IFTYPE_ADHOC) 2144 mvm->probe_queue = queue; 2145 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2146 mvm->p2p_dev_queue = queue; 2147 } 2148 2149 return 0; 2150 } 2151 2152 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2153 struct ieee80211_vif *vif) 2154 { 2155 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2156 int queue; 2157 2158 lockdep_assert_held(&mvm->mutex); 2159 2160 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2161 2162 switch (vif->type) { 2163 case NL80211_IFTYPE_AP: 2164 case NL80211_IFTYPE_ADHOC: 2165 queue = mvm->probe_queue; 2166 break; 2167 case NL80211_IFTYPE_P2P_DEVICE: 2168 queue = mvm->p2p_dev_queue; 2169 break; 2170 default: 2171 WARN(1, "Can't free bcast queue on vif type %d\n", 2172 vif->type); 2173 return; 2174 } 2175 2176 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2177 if (iwl_mvm_has_new_tx_api(mvm)) 2178 return; 2179 2180 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2181 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2182 } 2183 2184 /* Send the FW a request to remove the station from it's internal data 2185 * structures, but DO NOT remove the entry from the local data structures. */ 2186 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2187 { 2188 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2189 int ret; 2190 2191 lockdep_assert_held(&mvm->mutex); 2192 2193 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2194 2195 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2196 if (ret) 2197 IWL_WARN(mvm, "Failed sending remove station\n"); 2198 return ret; 2199 } 2200 2201 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2202 { 2203 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2204 2205 lockdep_assert_held(&mvm->mutex); 2206 2207 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2208 ieee80211_vif_type_p2p(vif), 2209 IWL_STA_GENERAL_PURPOSE); 2210 } 2211 2212 /* Allocate a new station entry for the broadcast station to the given vif, 2213 * and send it to the FW. 2214 * Note that each P2P mac should have its own broadcast station. 2215 * 2216 * @mvm: the mvm component 2217 * @vif: the interface to which the broadcast station is added 2218 * @bsta: the broadcast station to add. */ 2219 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2220 { 2221 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2222 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2223 int ret; 2224 2225 lockdep_assert_held(&mvm->mutex); 2226 2227 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2228 if (ret) 2229 return ret; 2230 2231 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2232 2233 if (ret) 2234 iwl_mvm_dealloc_int_sta(mvm, bsta); 2235 2236 return ret; 2237 } 2238 2239 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2240 { 2241 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2242 2243 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2244 } 2245 2246 /* 2247 * Send the FW a request to remove the station from it's internal data 2248 * structures, and in addition remove it from the local data structure. 2249 */ 2250 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2251 { 2252 int ret; 2253 2254 lockdep_assert_held(&mvm->mutex); 2255 2256 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2257 2258 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2259 2260 return ret; 2261 } 2262 2263 /* 2264 * Allocate a new station entry for the multicast station to the given vif, 2265 * and send it to the FW. 2266 * Note that each AP/GO mac should have its own multicast station. 2267 * 2268 * @mvm: the mvm component 2269 * @vif: the interface to which the multicast station is added 2270 */ 2271 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2272 { 2273 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2274 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2275 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2276 const u8 *maddr = _maddr; 2277 struct iwl_trans_txq_scd_cfg cfg = { 2278 .fifo = IWL_MVM_TX_FIFO_MCAST, 2279 .sta_id = msta->sta_id, 2280 .tid = 0, 2281 .aggregate = false, 2282 .frame_limit = IWL_FRAME_LIMIT, 2283 }; 2284 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2285 int ret; 2286 2287 lockdep_assert_held(&mvm->mutex); 2288 2289 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2290 vif->type != NL80211_IFTYPE_ADHOC)) 2291 return -ENOTSUPP; 2292 2293 /* 2294 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2295 * invalid, so make sure we use the queue we want. 2296 * Note that this is done here as we want to avoid making DQA 2297 * changes in mac80211 layer. 2298 */ 2299 if (vif->type == NL80211_IFTYPE_ADHOC) 2300 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2301 2302 /* 2303 * While in previous FWs we had to exclude cab queue from TFD queue 2304 * mask, now it is needed as any other queue. 2305 */ 2306 if (!iwl_mvm_has_new_tx_api(mvm) && 2307 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2308 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2309 timeout); 2310 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2311 } 2312 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2313 mvmvif->id, mvmvif->color); 2314 if (ret) { 2315 iwl_mvm_dealloc_int_sta(mvm, msta); 2316 return ret; 2317 } 2318 2319 /* 2320 * Enable cab queue after the ADD_STA command is sent. 2321 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2322 * command with unknown station id, and for FW that doesn't support 2323 * station API since the cab queue is not included in the 2324 * tfd_queue_mask. 2325 */ 2326 if (iwl_mvm_has_new_tx_api(mvm)) { 2327 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2328 0, 2329 timeout); 2330 mvmvif->cab_queue = queue; 2331 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2332 IWL_UCODE_TLV_API_STA_TYPE)) 2333 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2334 timeout); 2335 2336 if (mvmvif->ap_wep_key) { 2337 u8 key_offset = iwl_mvm_set_fw_key_idx(mvm); 2338 2339 __set_bit(key_offset, mvm->fw_key_table); 2340 2341 if (key_offset == STA_KEY_IDX_INVALID) 2342 return -ENOSPC; 2343 2344 ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id, 2345 mvmvif->ap_wep_key, true, 0, NULL, 0, 2346 key_offset, 0); 2347 if (ret) 2348 return ret; 2349 } 2350 2351 return 0; 2352 } 2353 2354 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2355 struct ieee80211_key_conf *keyconf, 2356 bool mcast) 2357 { 2358 union { 2359 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2360 struct iwl_mvm_add_sta_key_cmd cmd; 2361 } u = {}; 2362 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2363 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2364 __le16 key_flags; 2365 int ret, size; 2366 u32 status; 2367 2368 /* This is a valid situation for GTK removal */ 2369 if (sta_id == IWL_MVM_INVALID_STA) 2370 return 0; 2371 2372 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2373 STA_KEY_FLG_KEYID_MSK); 2374 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2375 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2376 2377 if (mcast) 2378 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2379 2380 /* 2381 * The fields assigned here are in the same location at the start 2382 * of the command, so we can do this union trick. 2383 */ 2384 u.cmd.common.key_flags = key_flags; 2385 u.cmd.common.key_offset = keyconf->hw_key_idx; 2386 u.cmd.common.sta_id = sta_id; 2387 2388 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2389 2390 status = ADD_STA_SUCCESS; 2391 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2392 &status); 2393 2394 switch (status) { 2395 case ADD_STA_SUCCESS: 2396 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2397 break; 2398 default: 2399 ret = -EIO; 2400 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2401 break; 2402 } 2403 2404 return ret; 2405 } 2406 2407 /* 2408 * Send the FW a request to remove the station from it's internal data 2409 * structures, and in addition remove it from the local data structure. 2410 */ 2411 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2412 { 2413 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2414 int ret; 2415 2416 lockdep_assert_held(&mvm->mutex); 2417 2418 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2419 2420 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2421 2422 if (mvmvif->ap_wep_key) { 2423 int i; 2424 2425 if (!__test_and_clear_bit(mvmvif->ap_wep_key->hw_key_idx, 2426 mvm->fw_key_table)) { 2427 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 2428 mvmvif->ap_wep_key->hw_key_idx); 2429 return -ENOENT; 2430 } 2431 2432 /* track which key was deleted last */ 2433 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2434 if (mvm->fw_key_deleted[i] < U8_MAX) 2435 mvm->fw_key_deleted[i]++; 2436 } 2437 mvm->fw_key_deleted[mvmvif->ap_wep_key->hw_key_idx] = 0; 2438 ret = __iwl_mvm_remove_sta_key(mvm, mvmvif->mcast_sta.sta_id, 2439 mvmvif->ap_wep_key, true); 2440 if (ret) 2441 return ret; 2442 } 2443 2444 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2445 if (ret) 2446 IWL_WARN(mvm, "Failed sending remove station\n"); 2447 2448 return ret; 2449 } 2450 2451 #define IWL_MAX_RX_BA_SESSIONS 16 2452 2453 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2454 { 2455 struct iwl_mvm_delba_notif notif = { 2456 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2457 .metadata.sync = 1, 2458 .delba.baid = baid, 2459 }; 2460 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2461 }; 2462 2463 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2464 struct iwl_mvm_baid_data *data) 2465 { 2466 int i; 2467 2468 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2469 2470 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2471 int j; 2472 struct iwl_mvm_reorder_buffer *reorder_buf = 2473 &data->reorder_buf[i]; 2474 struct iwl_mvm_reorder_buf_entry *entries = 2475 &data->entries[i * data->entries_per_queue]; 2476 2477 spin_lock_bh(&reorder_buf->lock); 2478 if (likely(!reorder_buf->num_stored)) { 2479 spin_unlock_bh(&reorder_buf->lock); 2480 continue; 2481 } 2482 2483 /* 2484 * This shouldn't happen in regular DELBA since the internal 2485 * delBA notification should trigger a release of all frames in 2486 * the reorder buffer. 2487 */ 2488 WARN_ON(1); 2489 2490 for (j = 0; j < reorder_buf->buf_size; j++) 2491 __skb_queue_purge(&entries[j].e.frames); 2492 /* 2493 * Prevent timer re-arm. This prevents a very far fetched case 2494 * where we timed out on the notification. There may be prior 2495 * RX frames pending in the RX queue before the notification 2496 * that might get processed between now and the actual deletion 2497 * and we would re-arm the timer although we are deleting the 2498 * reorder buffer. 2499 */ 2500 reorder_buf->removed = true; 2501 spin_unlock_bh(&reorder_buf->lock); 2502 del_timer_sync(&reorder_buf->reorder_timer); 2503 } 2504 } 2505 2506 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2507 struct iwl_mvm_baid_data *data, 2508 u16 ssn, u16 buf_size) 2509 { 2510 int i; 2511 2512 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2513 struct iwl_mvm_reorder_buffer *reorder_buf = 2514 &data->reorder_buf[i]; 2515 struct iwl_mvm_reorder_buf_entry *entries = 2516 &data->entries[i * data->entries_per_queue]; 2517 int j; 2518 2519 reorder_buf->num_stored = 0; 2520 reorder_buf->head_sn = ssn; 2521 reorder_buf->buf_size = buf_size; 2522 /* rx reorder timer */ 2523 timer_setup(&reorder_buf->reorder_timer, 2524 iwl_mvm_reorder_timer_expired, 0); 2525 spin_lock_init(&reorder_buf->lock); 2526 reorder_buf->mvm = mvm; 2527 reorder_buf->queue = i; 2528 reorder_buf->valid = false; 2529 for (j = 0; j < reorder_buf->buf_size; j++) 2530 __skb_queue_head_init(&entries[j].e.frames); 2531 } 2532 } 2533 2534 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2535 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2536 { 2537 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2538 struct iwl_mvm_add_sta_cmd cmd = {}; 2539 struct iwl_mvm_baid_data *baid_data = NULL; 2540 int ret; 2541 u32 status; 2542 2543 lockdep_assert_held(&mvm->mutex); 2544 2545 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2546 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2547 return -ENOSPC; 2548 } 2549 2550 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2551 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2552 2553 /* sparse doesn't like the __align() so don't check */ 2554 #ifndef __CHECKER__ 2555 /* 2556 * The division below will be OK if either the cache line size 2557 * can be divided by the entry size (ALIGN will round up) or if 2558 * if the entry size can be divided by the cache line size, in 2559 * which case the ALIGN() will do nothing. 2560 */ 2561 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2562 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2563 #endif 2564 2565 /* 2566 * Upward align the reorder buffer size to fill an entire cache 2567 * line for each queue, to avoid sharing cache lines between 2568 * different queues. 2569 */ 2570 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2571 2572 /* 2573 * Allocate here so if allocation fails we can bail out early 2574 * before starting the BA session in the firmware 2575 */ 2576 baid_data = kzalloc(sizeof(*baid_data) + 2577 mvm->trans->num_rx_queues * 2578 reorder_buf_size, 2579 GFP_KERNEL); 2580 if (!baid_data) 2581 return -ENOMEM; 2582 2583 /* 2584 * This division is why we need the above BUILD_BUG_ON(), 2585 * if that doesn't hold then this will not be right. 2586 */ 2587 baid_data->entries_per_queue = 2588 reorder_buf_size / sizeof(baid_data->entries[0]); 2589 } 2590 2591 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2592 cmd.sta_id = mvm_sta->sta_id; 2593 cmd.add_modify = STA_MODE_MODIFY; 2594 if (start) { 2595 cmd.add_immediate_ba_tid = (u8) tid; 2596 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2597 cmd.rx_ba_window = cpu_to_le16(buf_size); 2598 } else { 2599 cmd.remove_immediate_ba_tid = (u8) tid; 2600 } 2601 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2602 STA_MODIFY_REMOVE_BA_TID; 2603 2604 status = ADD_STA_SUCCESS; 2605 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2606 iwl_mvm_add_sta_cmd_size(mvm), 2607 &cmd, &status); 2608 if (ret) 2609 goto out_free; 2610 2611 switch (status & IWL_ADD_STA_STATUS_MASK) { 2612 case ADD_STA_SUCCESS: 2613 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2614 start ? "start" : "stopp"); 2615 break; 2616 case ADD_STA_IMMEDIATE_BA_FAILURE: 2617 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2618 ret = -ENOSPC; 2619 break; 2620 default: 2621 ret = -EIO; 2622 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2623 start ? "start" : "stopp", status); 2624 break; 2625 } 2626 2627 if (ret) 2628 goto out_free; 2629 2630 if (start) { 2631 u8 baid; 2632 2633 mvm->rx_ba_sessions++; 2634 2635 if (!iwl_mvm_has_new_rx_api(mvm)) 2636 return 0; 2637 2638 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2639 ret = -EINVAL; 2640 goto out_free; 2641 } 2642 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2643 IWL_ADD_STA_BAID_SHIFT); 2644 baid_data->baid = baid; 2645 baid_data->timeout = timeout; 2646 baid_data->last_rx = jiffies; 2647 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2648 timer_setup(&baid_data->session_timer, 2649 iwl_mvm_rx_agg_session_expired, 0); 2650 baid_data->mvm = mvm; 2651 baid_data->tid = tid; 2652 baid_data->sta_id = mvm_sta->sta_id; 2653 2654 mvm_sta->tid_to_baid[tid] = baid; 2655 if (timeout) 2656 mod_timer(&baid_data->session_timer, 2657 TU_TO_EXP_TIME(timeout * 2)); 2658 2659 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2660 /* 2661 * protect the BA data with RCU to cover a case where our 2662 * internal RX sync mechanism will timeout (not that it's 2663 * supposed to happen) and we will free the session data while 2664 * RX is being processed in parallel 2665 */ 2666 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2667 mvm_sta->sta_id, tid, baid); 2668 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2669 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2670 } else { 2671 u8 baid = mvm_sta->tid_to_baid[tid]; 2672 2673 if (mvm->rx_ba_sessions > 0) 2674 /* check that restart flow didn't zero the counter */ 2675 mvm->rx_ba_sessions--; 2676 if (!iwl_mvm_has_new_rx_api(mvm)) 2677 return 0; 2678 2679 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2680 return -EINVAL; 2681 2682 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2683 if (WARN_ON(!baid_data)) 2684 return -EINVAL; 2685 2686 /* synchronize all rx queues so we can safely delete */ 2687 iwl_mvm_free_reorder(mvm, baid_data); 2688 del_timer_sync(&baid_data->session_timer); 2689 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2690 kfree_rcu(baid_data, rcu_head); 2691 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2692 } 2693 return 0; 2694 2695 out_free: 2696 kfree(baid_data); 2697 return ret; 2698 } 2699 2700 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2701 int tid, u8 queue, bool start) 2702 { 2703 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2704 struct iwl_mvm_add_sta_cmd cmd = {}; 2705 int ret; 2706 u32 status; 2707 2708 lockdep_assert_held(&mvm->mutex); 2709 2710 if (start) { 2711 mvm_sta->tfd_queue_msk |= BIT(queue); 2712 mvm_sta->tid_disable_agg &= ~BIT(tid); 2713 } else { 2714 /* In DQA-mode the queue isn't removed on agg termination */ 2715 mvm_sta->tid_disable_agg |= BIT(tid); 2716 } 2717 2718 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2719 cmd.sta_id = mvm_sta->sta_id; 2720 cmd.add_modify = STA_MODE_MODIFY; 2721 if (!iwl_mvm_has_new_tx_api(mvm)) 2722 cmd.modify_mask = STA_MODIFY_QUEUES; 2723 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2724 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2725 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2726 2727 status = ADD_STA_SUCCESS; 2728 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2729 iwl_mvm_add_sta_cmd_size(mvm), 2730 &cmd, &status); 2731 if (ret) 2732 return ret; 2733 2734 switch (status & IWL_ADD_STA_STATUS_MASK) { 2735 case ADD_STA_SUCCESS: 2736 break; 2737 default: 2738 ret = -EIO; 2739 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2740 start ? "start" : "stopp", status); 2741 break; 2742 } 2743 2744 return ret; 2745 } 2746 2747 const u8 tid_to_mac80211_ac[] = { 2748 IEEE80211_AC_BE, 2749 IEEE80211_AC_BK, 2750 IEEE80211_AC_BK, 2751 IEEE80211_AC_BE, 2752 IEEE80211_AC_VI, 2753 IEEE80211_AC_VI, 2754 IEEE80211_AC_VO, 2755 IEEE80211_AC_VO, 2756 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2757 }; 2758 2759 static const u8 tid_to_ucode_ac[] = { 2760 AC_BE, 2761 AC_BK, 2762 AC_BK, 2763 AC_BE, 2764 AC_VI, 2765 AC_VI, 2766 AC_VO, 2767 AC_VO, 2768 }; 2769 2770 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2771 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2772 { 2773 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2774 struct iwl_mvm_tid_data *tid_data; 2775 u16 normalized_ssn; 2776 u16 txq_id; 2777 int ret; 2778 2779 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2780 return -EINVAL; 2781 2782 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2783 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2784 IWL_ERR(mvm, 2785 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2786 mvmsta->tid_data[tid].state); 2787 return -ENXIO; 2788 } 2789 2790 lockdep_assert_held(&mvm->mutex); 2791 2792 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2793 iwl_mvm_has_new_tx_api(mvm)) { 2794 u8 ac = tid_to_mac80211_ac[tid]; 2795 2796 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2797 if (ret) 2798 return ret; 2799 } 2800 2801 spin_lock_bh(&mvmsta->lock); 2802 2803 /* possible race condition - we entered D0i3 while starting agg */ 2804 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2805 spin_unlock_bh(&mvmsta->lock); 2806 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2807 return -EIO; 2808 } 2809 2810 /* 2811 * Note the possible cases: 2812 * 1. An enabled TXQ - TXQ needs to become agg'ed 2813 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2814 * it as reserved 2815 */ 2816 txq_id = mvmsta->tid_data[tid].txq_id; 2817 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2818 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2819 IWL_MVM_DQA_MIN_DATA_QUEUE, 2820 IWL_MVM_DQA_MAX_DATA_QUEUE); 2821 if (ret < 0) { 2822 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2823 goto out; 2824 } 2825 2826 txq_id = ret; 2827 2828 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2829 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2830 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2831 ret = -ENXIO; 2832 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2833 tid, IWL_MAX_HW_QUEUES - 1); 2834 goto out; 2835 2836 } else if (unlikely(mvm->queue_info[txq_id].status == 2837 IWL_MVM_QUEUE_SHARED)) { 2838 ret = -ENXIO; 2839 IWL_DEBUG_TX_QUEUES(mvm, 2840 "Can't start tid %d agg on shared queue!\n", 2841 tid); 2842 goto out; 2843 } 2844 2845 IWL_DEBUG_TX_QUEUES(mvm, 2846 "AGG for tid %d will be on queue #%d\n", 2847 tid, txq_id); 2848 2849 tid_data = &mvmsta->tid_data[tid]; 2850 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2851 tid_data->txq_id = txq_id; 2852 *ssn = tid_data->ssn; 2853 2854 IWL_DEBUG_TX_QUEUES(mvm, 2855 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2856 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2857 tid_data->next_reclaimed); 2858 2859 /* 2860 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2861 * to align the wrap around of ssn so we compare relevant values. 2862 */ 2863 normalized_ssn = tid_data->ssn; 2864 if (mvm->trans->cfg->gen2) 2865 normalized_ssn &= 0xff; 2866 2867 if (normalized_ssn == tid_data->next_reclaimed) { 2868 tid_data->state = IWL_AGG_STARTING; 2869 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2870 } else { 2871 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2872 } 2873 2874 ret = 0; 2875 2876 out: 2877 spin_unlock_bh(&mvmsta->lock); 2878 2879 return ret; 2880 } 2881 2882 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2883 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2884 bool amsdu) 2885 { 2886 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2887 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2888 unsigned int wdg_timeout = 2889 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2890 int queue, ret; 2891 bool alloc_queue = true; 2892 enum iwl_mvm_queue_status queue_status; 2893 u16 ssn; 2894 2895 struct iwl_trans_txq_scd_cfg cfg = { 2896 .sta_id = mvmsta->sta_id, 2897 .tid = tid, 2898 .frame_limit = buf_size, 2899 .aggregate = true, 2900 }; 2901 2902 /* 2903 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2904 * manager, so this function should never be called in this case. 2905 */ 2906 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2907 return -EINVAL; 2908 2909 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2910 != IWL_MAX_TID_COUNT); 2911 2912 spin_lock_bh(&mvmsta->lock); 2913 ssn = tid_data->ssn; 2914 queue = tid_data->txq_id; 2915 tid_data->state = IWL_AGG_ON; 2916 mvmsta->agg_tids |= BIT(tid); 2917 tid_data->ssn = 0xffff; 2918 tid_data->amsdu_in_ampdu_allowed = amsdu; 2919 spin_unlock_bh(&mvmsta->lock); 2920 2921 if (iwl_mvm_has_new_tx_api(mvm)) { 2922 /* 2923 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2924 * would have failed, so if we are here there is no need to 2925 * allocate a queue. 2926 * However, if aggregation size is different than the default 2927 * size, the scheduler should be reconfigured. 2928 * We cannot do this with the new TX API, so return unsupported 2929 * for now, until it will be offloaded to firmware.. 2930 * Note that if SCD default value changes - this condition 2931 * should be updated as well. 2932 */ 2933 if (buf_size < IWL_FRAME_LIMIT) 2934 return -ENOTSUPP; 2935 2936 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2937 if (ret) 2938 return -EIO; 2939 goto out; 2940 } 2941 2942 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2943 2944 queue_status = mvm->queue_info[queue].status; 2945 2946 /* Maybe there is no need to even alloc a queue... */ 2947 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2948 alloc_queue = false; 2949 2950 /* 2951 * Only reconfig the SCD for the queue if the window size has 2952 * changed from current (become smaller) 2953 */ 2954 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2955 /* 2956 * If reconfiguring an existing queue, it first must be 2957 * drained 2958 */ 2959 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2960 BIT(queue)); 2961 if (ret) { 2962 IWL_ERR(mvm, 2963 "Error draining queue before reconfig\n"); 2964 return ret; 2965 } 2966 2967 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2968 mvmsta->sta_id, tid, 2969 buf_size, ssn); 2970 if (ret) { 2971 IWL_ERR(mvm, 2972 "Error reconfiguring TXQ #%d\n", queue); 2973 return ret; 2974 } 2975 } 2976 2977 if (alloc_queue) 2978 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2979 &cfg, wdg_timeout); 2980 2981 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2982 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2983 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2984 if (ret) 2985 return -EIO; 2986 } 2987 2988 /* No need to mark as reserved */ 2989 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2990 2991 out: 2992 /* 2993 * Even though in theory the peer could have different 2994 * aggregation reorder buffer sizes for different sessions, 2995 * our ucode doesn't allow for that and has a global limit 2996 * for each station. Therefore, use the minimum of all the 2997 * aggregation sessions and our default value. 2998 */ 2999 mvmsta->max_agg_bufsize = 3000 min(mvmsta->max_agg_bufsize, buf_size); 3001 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 3002 3003 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 3004 sta->addr, tid); 3005 3006 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false); 3007 } 3008 3009 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3010 struct iwl_mvm_sta *mvmsta, 3011 struct iwl_mvm_tid_data *tid_data) 3012 { 3013 u16 txq_id = tid_data->txq_id; 3014 3015 lockdep_assert_held(&mvm->mutex); 3016 3017 if (iwl_mvm_has_new_tx_api(mvm)) 3018 return; 3019 3020 /* 3021 * The TXQ is marked as reserved only if no traffic came through yet 3022 * This means no traffic has been sent on this TID (agg'd or not), so 3023 * we no longer have use for the queue. Since it hasn't even been 3024 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3025 * free. 3026 */ 3027 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3028 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3029 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3030 } 3031 } 3032 3033 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3034 struct ieee80211_sta *sta, u16 tid) 3035 { 3036 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3037 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3038 u16 txq_id; 3039 int err; 3040 3041 /* 3042 * If mac80211 is cleaning its state, then say that we finished since 3043 * our state has been cleared anyway. 3044 */ 3045 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3046 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3047 return 0; 3048 } 3049 3050 spin_lock_bh(&mvmsta->lock); 3051 3052 txq_id = tid_data->txq_id; 3053 3054 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3055 mvmsta->sta_id, tid, txq_id, tid_data->state); 3056 3057 mvmsta->agg_tids &= ~BIT(tid); 3058 3059 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3060 3061 switch (tid_data->state) { 3062 case IWL_AGG_ON: 3063 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3064 3065 IWL_DEBUG_TX_QUEUES(mvm, 3066 "ssn = %d, next_recl = %d\n", 3067 tid_data->ssn, tid_data->next_reclaimed); 3068 3069 tid_data->ssn = 0xffff; 3070 tid_data->state = IWL_AGG_OFF; 3071 spin_unlock_bh(&mvmsta->lock); 3072 3073 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3074 3075 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3076 return 0; 3077 case IWL_AGG_STARTING: 3078 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3079 /* 3080 * The agg session has been stopped before it was set up. This 3081 * can happen when the AddBA timer times out for example. 3082 */ 3083 3084 /* No barriers since we are under mutex */ 3085 lockdep_assert_held(&mvm->mutex); 3086 3087 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3088 tid_data->state = IWL_AGG_OFF; 3089 err = 0; 3090 break; 3091 default: 3092 IWL_ERR(mvm, 3093 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3094 mvmsta->sta_id, tid, tid_data->state); 3095 IWL_ERR(mvm, 3096 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3097 err = -EINVAL; 3098 } 3099 3100 spin_unlock_bh(&mvmsta->lock); 3101 3102 return err; 3103 } 3104 3105 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3106 struct ieee80211_sta *sta, u16 tid) 3107 { 3108 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3109 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3110 u16 txq_id; 3111 enum iwl_mvm_agg_state old_state; 3112 3113 /* 3114 * First set the agg state to OFF to avoid calling 3115 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3116 */ 3117 spin_lock_bh(&mvmsta->lock); 3118 txq_id = tid_data->txq_id; 3119 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3120 mvmsta->sta_id, tid, txq_id, tid_data->state); 3121 old_state = tid_data->state; 3122 tid_data->state = IWL_AGG_OFF; 3123 mvmsta->agg_tids &= ~BIT(tid); 3124 spin_unlock_bh(&mvmsta->lock); 3125 3126 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3127 3128 if (old_state >= IWL_AGG_ON) { 3129 iwl_mvm_drain_sta(mvm, mvmsta, true); 3130 3131 if (iwl_mvm_has_new_tx_api(mvm)) { 3132 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3133 BIT(tid), 0)) 3134 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3135 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3136 } else { 3137 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3138 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3139 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3140 } 3141 3142 iwl_mvm_drain_sta(mvm, mvmsta, false); 3143 3144 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3145 } 3146 3147 return 0; 3148 } 3149 3150 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3151 { 3152 int i, max = -1, max_offs = -1; 3153 3154 lockdep_assert_held(&mvm->mutex); 3155 3156 /* Pick the unused key offset with the highest 'deleted' 3157 * counter. Every time a key is deleted, all the counters 3158 * are incremented and the one that was just deleted is 3159 * reset to zero. Thus, the highest counter is the one 3160 * that was deleted longest ago. Pick that one. 3161 */ 3162 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3163 if (test_bit(i, mvm->fw_key_table)) 3164 continue; 3165 if (mvm->fw_key_deleted[i] > max) { 3166 max = mvm->fw_key_deleted[i]; 3167 max_offs = i; 3168 } 3169 } 3170 3171 if (max_offs < 0) 3172 return STA_KEY_IDX_INVALID; 3173 3174 return max_offs; 3175 } 3176 3177 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3178 struct ieee80211_vif *vif, 3179 struct ieee80211_sta *sta) 3180 { 3181 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3182 3183 if (sta) 3184 return iwl_mvm_sta_from_mac80211(sta); 3185 3186 /* 3187 * The device expects GTKs for station interfaces to be 3188 * installed as GTKs for the AP station. If we have no 3189 * station ID, then use AP's station ID. 3190 */ 3191 if (vif->type == NL80211_IFTYPE_STATION && 3192 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3193 u8 sta_id = mvmvif->ap_sta_id; 3194 3195 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3196 lockdep_is_held(&mvm->mutex)); 3197 3198 /* 3199 * It is possible that the 'sta' parameter is NULL, 3200 * for example when a GTK is removed - the sta_id will then 3201 * be the AP ID, and no station was passed by mac80211. 3202 */ 3203 if (IS_ERR_OR_NULL(sta)) 3204 return NULL; 3205 3206 return iwl_mvm_sta_from_mac80211(sta); 3207 } 3208 3209 return NULL; 3210 } 3211 3212 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3213 u32 sta_id, 3214 struct ieee80211_key_conf *key, bool mcast, 3215 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3216 u8 key_offset, bool mfp) 3217 { 3218 union { 3219 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3220 struct iwl_mvm_add_sta_key_cmd cmd; 3221 } u = {}; 3222 __le16 key_flags; 3223 int ret; 3224 u32 status; 3225 u16 keyidx; 3226 u64 pn = 0; 3227 int i, size; 3228 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3229 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3230 3231 if (sta_id == IWL_MVM_INVALID_STA) 3232 return -EINVAL; 3233 3234 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3235 STA_KEY_FLG_KEYID_MSK; 3236 key_flags = cpu_to_le16(keyidx); 3237 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3238 3239 switch (key->cipher) { 3240 case WLAN_CIPHER_SUITE_TKIP: 3241 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3242 if (new_api) { 3243 memcpy((void *)&u.cmd.tx_mic_key, 3244 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3245 IWL_MIC_KEY_SIZE); 3246 3247 memcpy((void *)&u.cmd.rx_mic_key, 3248 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3249 IWL_MIC_KEY_SIZE); 3250 pn = atomic64_read(&key->tx_pn); 3251 3252 } else { 3253 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3254 for (i = 0; i < 5; i++) 3255 u.cmd_v1.tkip_rx_ttak[i] = 3256 cpu_to_le16(tkip_p1k[i]); 3257 } 3258 memcpy(u.cmd.common.key, key->key, key->keylen); 3259 break; 3260 case WLAN_CIPHER_SUITE_CCMP: 3261 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3262 memcpy(u.cmd.common.key, key->key, key->keylen); 3263 if (new_api) 3264 pn = atomic64_read(&key->tx_pn); 3265 break; 3266 case WLAN_CIPHER_SUITE_WEP104: 3267 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3268 /* fall through */ 3269 case WLAN_CIPHER_SUITE_WEP40: 3270 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3271 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3272 break; 3273 case WLAN_CIPHER_SUITE_GCMP_256: 3274 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3275 /* fall through */ 3276 case WLAN_CIPHER_SUITE_GCMP: 3277 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3278 memcpy(u.cmd.common.key, key->key, key->keylen); 3279 if (new_api) 3280 pn = atomic64_read(&key->tx_pn); 3281 break; 3282 default: 3283 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3284 memcpy(u.cmd.common.key, key->key, key->keylen); 3285 } 3286 3287 if (mcast) 3288 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3289 if (mfp) 3290 key_flags |= cpu_to_le16(STA_KEY_MFP); 3291 3292 u.cmd.common.key_offset = key_offset; 3293 u.cmd.common.key_flags = key_flags; 3294 u.cmd.common.sta_id = sta_id; 3295 3296 if (new_api) { 3297 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3298 size = sizeof(u.cmd); 3299 } else { 3300 size = sizeof(u.cmd_v1); 3301 } 3302 3303 status = ADD_STA_SUCCESS; 3304 if (cmd_flags & CMD_ASYNC) 3305 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3306 &u.cmd); 3307 else 3308 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3309 &u.cmd, &status); 3310 3311 switch (status) { 3312 case ADD_STA_SUCCESS: 3313 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3314 break; 3315 default: 3316 ret = -EIO; 3317 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3318 break; 3319 } 3320 3321 return ret; 3322 } 3323 3324 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3325 struct ieee80211_key_conf *keyconf, 3326 u8 sta_id, bool remove_key) 3327 { 3328 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3329 3330 /* verify the key details match the required command's expectations */ 3331 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3332 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3333 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3334 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3335 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3336 return -EINVAL; 3337 3338 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3339 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3340 return -EINVAL; 3341 3342 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3343 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3344 3345 if (remove_key) { 3346 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3347 } else { 3348 struct ieee80211_key_seq seq; 3349 const u8 *pn; 3350 3351 switch (keyconf->cipher) { 3352 case WLAN_CIPHER_SUITE_AES_CMAC: 3353 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3354 break; 3355 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3356 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3357 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3358 break; 3359 default: 3360 return -EINVAL; 3361 } 3362 3363 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3364 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3365 igtk_cmd.ctrl_flags |= 3366 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3367 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3368 pn = seq.aes_cmac.pn; 3369 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3370 ((u64) pn[4] << 8) | 3371 ((u64) pn[3] << 16) | 3372 ((u64) pn[2] << 24) | 3373 ((u64) pn[1] << 32) | 3374 ((u64) pn[0] << 40)); 3375 } 3376 3377 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3378 remove_key ? "removing" : "installing", 3379 igtk_cmd.sta_id); 3380 3381 if (!iwl_mvm_has_new_rx_api(mvm)) { 3382 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3383 .ctrl_flags = igtk_cmd.ctrl_flags, 3384 .key_id = igtk_cmd.key_id, 3385 .sta_id = igtk_cmd.sta_id, 3386 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3387 }; 3388 3389 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3390 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3391 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3392 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3393 } 3394 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3395 sizeof(igtk_cmd), &igtk_cmd); 3396 } 3397 3398 3399 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3400 struct ieee80211_vif *vif, 3401 struct ieee80211_sta *sta) 3402 { 3403 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3404 3405 if (sta) 3406 return sta->addr; 3407 3408 if (vif->type == NL80211_IFTYPE_STATION && 3409 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3410 u8 sta_id = mvmvif->ap_sta_id; 3411 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3412 lockdep_is_held(&mvm->mutex)); 3413 return sta->addr; 3414 } 3415 3416 3417 return NULL; 3418 } 3419 3420 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3421 struct ieee80211_vif *vif, 3422 struct ieee80211_sta *sta, 3423 struct ieee80211_key_conf *keyconf, 3424 u8 key_offset, 3425 bool mcast) 3426 { 3427 int ret; 3428 const u8 *addr; 3429 struct ieee80211_key_seq seq; 3430 u16 p1k[5]; 3431 u32 sta_id; 3432 bool mfp = false; 3433 3434 if (sta) { 3435 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3436 3437 sta_id = mvm_sta->sta_id; 3438 mfp = sta->mfp; 3439 } else if (vif->type == NL80211_IFTYPE_AP && 3440 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3441 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3442 3443 sta_id = mvmvif->mcast_sta.sta_id; 3444 } else { 3445 IWL_ERR(mvm, "Failed to find station id\n"); 3446 return -EINVAL; 3447 } 3448 3449 switch (keyconf->cipher) { 3450 case WLAN_CIPHER_SUITE_TKIP: 3451 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3452 /* get phase 1 key from mac80211 */ 3453 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3454 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3455 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3456 seq.tkip.iv32, p1k, 0, key_offset, 3457 mfp); 3458 break; 3459 case WLAN_CIPHER_SUITE_CCMP: 3460 case WLAN_CIPHER_SUITE_WEP40: 3461 case WLAN_CIPHER_SUITE_WEP104: 3462 case WLAN_CIPHER_SUITE_GCMP: 3463 case WLAN_CIPHER_SUITE_GCMP_256: 3464 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3465 0, NULL, 0, key_offset, mfp); 3466 break; 3467 default: 3468 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3469 0, NULL, 0, key_offset, mfp); 3470 } 3471 3472 return ret; 3473 } 3474 3475 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3476 struct ieee80211_vif *vif, 3477 struct ieee80211_sta *sta, 3478 struct ieee80211_key_conf *keyconf, 3479 u8 key_offset) 3480 { 3481 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3482 struct iwl_mvm_sta *mvm_sta; 3483 u8 sta_id = IWL_MVM_INVALID_STA; 3484 int ret; 3485 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3486 3487 lockdep_assert_held(&mvm->mutex); 3488 3489 if (vif->type != NL80211_IFTYPE_AP || 3490 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3491 /* Get the station id from the mvm local station table */ 3492 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3493 if (!mvm_sta) { 3494 IWL_ERR(mvm, "Failed to find station\n"); 3495 return -EINVAL; 3496 } 3497 sta_id = mvm_sta->sta_id; 3498 3499 /* 3500 * It is possible that the 'sta' parameter is NULL, and thus 3501 * there is a need to retrieve the sta from the local station 3502 * table. 3503 */ 3504 if (!sta) { 3505 sta = rcu_dereference_protected( 3506 mvm->fw_id_to_mac_id[sta_id], 3507 lockdep_is_held(&mvm->mutex)); 3508 if (IS_ERR_OR_NULL(sta)) { 3509 IWL_ERR(mvm, "Invalid station id\n"); 3510 return -EINVAL; 3511 } 3512 } 3513 3514 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3515 return -EINVAL; 3516 } else { 3517 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3518 3519 sta_id = mvmvif->mcast_sta.sta_id; 3520 } 3521 3522 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3523 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3524 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3525 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3526 goto end; 3527 } 3528 3529 /* If the key_offset is not pre-assigned, we need to find a 3530 * new offset to use. In normal cases, the offset is not 3531 * pre-assigned, but during HW_RESTART we want to reuse the 3532 * same indices, so we pass them when this function is called. 3533 * 3534 * In D3 entry, we need to hardcoded the indices (because the 3535 * firmware hardcodes the PTK offset to 0). In this case, we 3536 * need to make sure we don't overwrite the hw_key_idx in the 3537 * keyconf structure, because otherwise we cannot configure 3538 * the original ones back when resuming. 3539 */ 3540 if (key_offset == STA_KEY_IDX_INVALID) { 3541 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3542 if (key_offset == STA_KEY_IDX_INVALID) 3543 return -ENOSPC; 3544 keyconf->hw_key_idx = key_offset; 3545 } 3546 3547 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3548 if (ret) 3549 goto end; 3550 3551 /* 3552 * For WEP, the same key is used for multicast and unicast. Upload it 3553 * again, using the same key offset, and now pointing the other one 3554 * to the same key slot (offset). 3555 * If this fails, remove the original as well. 3556 */ 3557 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3558 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3559 sta) { 3560 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3561 key_offset, !mcast); 3562 if (ret) { 3563 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3564 goto end; 3565 } 3566 } 3567 3568 __set_bit(key_offset, mvm->fw_key_table); 3569 3570 end: 3571 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3572 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3573 sta ? sta->addr : zero_addr, ret); 3574 return ret; 3575 } 3576 3577 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3578 struct ieee80211_vif *vif, 3579 struct ieee80211_sta *sta, 3580 struct ieee80211_key_conf *keyconf) 3581 { 3582 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3583 struct iwl_mvm_sta *mvm_sta; 3584 u8 sta_id = IWL_MVM_INVALID_STA; 3585 int ret, i; 3586 3587 lockdep_assert_held(&mvm->mutex); 3588 3589 /* Get the station from the mvm local station table */ 3590 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3591 if (mvm_sta) 3592 sta_id = mvm_sta->sta_id; 3593 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3594 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3595 3596 3597 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3598 keyconf->keyidx, sta_id); 3599 3600 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3601 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3602 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3603 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3604 3605 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3606 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3607 keyconf->hw_key_idx); 3608 return -ENOENT; 3609 } 3610 3611 /* track which key was deleted last */ 3612 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3613 if (mvm->fw_key_deleted[i] < U8_MAX) 3614 mvm->fw_key_deleted[i]++; 3615 } 3616 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3617 3618 if (sta && !mvm_sta) { 3619 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3620 return 0; 3621 } 3622 3623 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3624 if (ret) 3625 return ret; 3626 3627 /* delete WEP key twice to get rid of (now useless) offset */ 3628 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3629 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3630 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3631 3632 return ret; 3633 } 3634 3635 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3636 struct ieee80211_vif *vif, 3637 struct ieee80211_key_conf *keyconf, 3638 struct ieee80211_sta *sta, u32 iv32, 3639 u16 *phase1key) 3640 { 3641 struct iwl_mvm_sta *mvm_sta; 3642 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3643 bool mfp = sta ? sta->mfp : false; 3644 3645 rcu_read_lock(); 3646 3647 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3648 if (WARN_ON_ONCE(!mvm_sta)) 3649 goto unlock; 3650 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3651 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3652 mfp); 3653 3654 unlock: 3655 rcu_read_unlock(); 3656 } 3657 3658 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3659 struct ieee80211_sta *sta) 3660 { 3661 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3662 struct iwl_mvm_add_sta_cmd cmd = { 3663 .add_modify = STA_MODE_MODIFY, 3664 .sta_id = mvmsta->sta_id, 3665 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3666 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3667 }; 3668 int ret; 3669 3670 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3671 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3672 if (ret) 3673 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3674 } 3675 3676 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3677 struct ieee80211_sta *sta, 3678 enum ieee80211_frame_release_type reason, 3679 u16 cnt, u16 tids, bool more_data, 3680 bool single_sta_queue) 3681 { 3682 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3683 struct iwl_mvm_add_sta_cmd cmd = { 3684 .add_modify = STA_MODE_MODIFY, 3685 .sta_id = mvmsta->sta_id, 3686 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3687 .sleep_tx_count = cpu_to_le16(cnt), 3688 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3689 }; 3690 int tid, ret; 3691 unsigned long _tids = tids; 3692 3693 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3694 * Note that this field is reserved and unused by firmware not 3695 * supporting GO uAPSD, so it's safe to always do this. 3696 */ 3697 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3698 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3699 3700 /* If we're releasing frames from aggregation or dqa queues then check 3701 * if all the queues that we're releasing frames from, combined, have: 3702 * - more frames than the service period, in which case more_data 3703 * needs to be set 3704 * - fewer than 'cnt' frames, in which case we need to adjust the 3705 * firmware command (but do that unconditionally) 3706 */ 3707 if (single_sta_queue) { 3708 int remaining = cnt; 3709 int sleep_tx_count; 3710 3711 spin_lock_bh(&mvmsta->lock); 3712 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3713 struct iwl_mvm_tid_data *tid_data; 3714 u16 n_queued; 3715 3716 tid_data = &mvmsta->tid_data[tid]; 3717 3718 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3719 if (n_queued > remaining) { 3720 more_data = true; 3721 remaining = 0; 3722 break; 3723 } 3724 remaining -= n_queued; 3725 } 3726 sleep_tx_count = cnt - remaining; 3727 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3728 mvmsta->sleep_tx_count = sleep_tx_count; 3729 spin_unlock_bh(&mvmsta->lock); 3730 3731 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3732 if (WARN_ON(cnt - remaining == 0)) { 3733 ieee80211_sta_eosp(sta); 3734 return; 3735 } 3736 } 3737 3738 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3739 if (more_data) 3740 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3741 3742 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3743 mvmsta->next_status_eosp = true; 3744 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3745 } else { 3746 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3747 } 3748 3749 /* block the Tx queues until the FW updated the sleep Tx count */ 3750 iwl_trans_block_txq_ptrs(mvm->trans, true); 3751 3752 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3753 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3754 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3755 if (ret) 3756 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3757 } 3758 3759 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3760 struct iwl_rx_cmd_buffer *rxb) 3761 { 3762 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3763 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3764 struct ieee80211_sta *sta; 3765 u32 sta_id = le32_to_cpu(notif->sta_id); 3766 3767 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3768 return; 3769 3770 rcu_read_lock(); 3771 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3772 if (!IS_ERR_OR_NULL(sta)) 3773 ieee80211_sta_eosp(sta); 3774 rcu_read_unlock(); 3775 } 3776 3777 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3778 struct iwl_mvm_sta *mvmsta, bool disable) 3779 { 3780 struct iwl_mvm_add_sta_cmd cmd = { 3781 .add_modify = STA_MODE_MODIFY, 3782 .sta_id = mvmsta->sta_id, 3783 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3784 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3785 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3786 }; 3787 int ret; 3788 3789 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3790 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3791 if (ret) 3792 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3793 } 3794 3795 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3796 struct ieee80211_sta *sta, 3797 bool disable) 3798 { 3799 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3800 3801 spin_lock_bh(&mvm_sta->lock); 3802 3803 if (mvm_sta->disable_tx == disable) { 3804 spin_unlock_bh(&mvm_sta->lock); 3805 return; 3806 } 3807 3808 mvm_sta->disable_tx = disable; 3809 3810 /* Tell mac80211 to start/stop queuing tx for this station */ 3811 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3812 3813 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3814 3815 spin_unlock_bh(&mvm_sta->lock); 3816 } 3817 3818 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3819 struct iwl_mvm_vif *mvmvif, 3820 struct iwl_mvm_int_sta *sta, 3821 bool disable) 3822 { 3823 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3824 struct iwl_mvm_add_sta_cmd cmd = { 3825 .add_modify = STA_MODE_MODIFY, 3826 .sta_id = sta->sta_id, 3827 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3828 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3829 .mac_id_n_color = cpu_to_le32(id), 3830 }; 3831 int ret; 3832 3833 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3834 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3835 if (ret) 3836 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3837 } 3838 3839 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3840 struct iwl_mvm_vif *mvmvif, 3841 bool disable) 3842 { 3843 struct ieee80211_sta *sta; 3844 struct iwl_mvm_sta *mvm_sta; 3845 int i; 3846 3847 lockdep_assert_held(&mvm->mutex); 3848 3849 /* Block/unblock all the stations of the given mvmvif */ 3850 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3851 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3852 lockdep_is_held(&mvm->mutex)); 3853 if (IS_ERR_OR_NULL(sta)) 3854 continue; 3855 3856 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3857 if (mvm_sta->mac_id_n_color != 3858 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3859 continue; 3860 3861 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3862 } 3863 3864 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3865 return; 3866 3867 /* Need to block/unblock also multicast station */ 3868 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3869 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3870 &mvmvif->mcast_sta, disable); 3871 3872 /* 3873 * Only unblock the broadcast station (FW blocks it for immediate 3874 * quiet, not the driver) 3875 */ 3876 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3877 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3878 &mvmvif->bcast_sta, disable); 3879 } 3880 3881 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3882 { 3883 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3884 struct iwl_mvm_sta *mvmsta; 3885 3886 rcu_read_lock(); 3887 3888 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3889 3890 if (!WARN_ON(!mvmsta)) 3891 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3892 3893 rcu_read_unlock(); 3894 } 3895 3896 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3897 { 3898 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3899 3900 /* 3901 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3902 * to align the wrap around of ssn so we compare relevant values. 3903 */ 3904 if (mvm->trans->cfg->gen2) 3905 sn &= 0xff; 3906 3907 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3908 } 3909