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, 2018 - 2020 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2012 - 2015, 2018 - 2020 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include <net/mac80211.h> 63 64 #include "mvm.h" 65 #include "sta.h" 66 #include "rs.h" 67 68 /* 69 * New version of ADD_STA_sta command added new fields at the end of the 70 * structure, so sending the size of the relevant API's structure is enough to 71 * support both API versions. 72 */ 73 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 74 { 75 if (iwl_mvm_has_new_rx_api(mvm) || 76 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 77 return sizeof(struct iwl_mvm_add_sta_cmd); 78 else 79 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 80 } 81 82 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 83 enum nl80211_iftype iftype) 84 { 85 int sta_id; 86 u32 reserved_ids = 0; 87 88 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32); 89 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 90 91 lockdep_assert_held(&mvm->mutex); 92 93 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 94 if (iftype != NL80211_IFTYPE_STATION) 95 reserved_ids = BIT(0); 96 97 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 98 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) { 99 if (BIT(sta_id) & reserved_ids) 100 continue; 101 102 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 103 lockdep_is_held(&mvm->mutex))) 104 return sta_id; 105 } 106 return IWL_MVM_INVALID_STA; 107 } 108 109 /* send station add/update command to firmware */ 110 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 111 bool update, unsigned int flags) 112 { 113 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 114 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 115 .sta_id = mvm_sta->sta_id, 116 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 117 .add_modify = update ? 1 : 0, 118 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 119 STA_FLG_MIMO_EN_MSK | 120 STA_FLG_RTS_MIMO_PROT), 121 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 122 }; 123 int ret; 124 u32 status; 125 u32 agg_size = 0, mpdu_dens = 0; 126 127 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 128 add_sta_cmd.station_type = mvm_sta->sta_type; 129 130 if (!update || (flags & STA_MODIFY_QUEUES)) { 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 133 if (!iwl_mvm_has_new_tx_api(mvm)) { 134 add_sta_cmd.tfd_queue_msk = 135 cpu_to_le32(mvm_sta->tfd_queue_msk); 136 137 if (flags & STA_MODIFY_QUEUES) 138 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 139 } else { 140 WARN_ON(flags & STA_MODIFY_QUEUES); 141 } 142 } 143 144 switch (sta->bandwidth) { 145 case IEEE80211_STA_RX_BW_160: 146 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 147 /* fall through */ 148 case IEEE80211_STA_RX_BW_80: 149 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 150 /* fall through */ 151 case IEEE80211_STA_RX_BW_40: 152 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 153 /* fall through */ 154 case IEEE80211_STA_RX_BW_20: 155 if (sta->ht_cap.ht_supported) 156 add_sta_cmd.station_flags |= 157 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 158 break; 159 } 160 161 switch (sta->rx_nss) { 162 case 1: 163 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 164 break; 165 case 2: 166 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 167 break; 168 case 3 ... 8: 169 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 170 break; 171 } 172 173 switch (sta->smps_mode) { 174 case IEEE80211_SMPS_AUTOMATIC: 175 case IEEE80211_SMPS_NUM_MODES: 176 WARN_ON(1); 177 break; 178 case IEEE80211_SMPS_STATIC: 179 /* override NSS */ 180 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 181 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 182 break; 183 case IEEE80211_SMPS_DYNAMIC: 184 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 185 break; 186 case IEEE80211_SMPS_OFF: 187 /* nothing */ 188 break; 189 } 190 191 if (sta->ht_cap.ht_supported) { 192 add_sta_cmd.station_flags_msk |= 193 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 194 STA_FLG_AGG_MPDU_DENS_MSK); 195 196 mpdu_dens = sta->ht_cap.ampdu_density; 197 } 198 199 200 if (sta->vht_cap.vht_supported) { 201 agg_size = sta->vht_cap.cap & 202 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 203 agg_size >>= 204 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 205 } else if (sta->ht_cap.ht_supported) { 206 agg_size = sta->ht_cap.ampdu_factor; 207 } 208 209 /* D6.0 10.12.2 A-MPDU length limit rules 210 * A STA indicates the maximum length of the A-MPDU preEOF padding 211 * that it can receive in an HE PPDU in the Maximum A-MPDU Length 212 * Exponent field in its HT Capabilities, VHT Capabilities, 213 * and HE 6 GHz Band Capabilities elements (if present) and the 214 * Maximum AMPDU Length Exponent Extension field in its HE 215 * Capabilities element 216 */ 217 if (sta->he_cap.has_he) 218 agg_size += u8_get_bits(sta->he_cap.he_cap_elem.mac_cap_info[3], 219 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK); 220 221 /* Limit to max A-MPDU supported by FW */ 222 if (agg_size > (STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT)) 223 agg_size = (STA_FLG_MAX_AGG_SIZE_4M >> 224 STA_FLG_MAX_AGG_SIZE_SHIFT); 225 226 add_sta_cmd.station_flags |= 227 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 228 add_sta_cmd.station_flags |= 229 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 230 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 231 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 232 233 if (sta->wme) { 234 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 235 236 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 237 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 238 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 239 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 240 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 241 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 242 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 243 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 244 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 245 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 246 } 247 248 status = ADD_STA_SUCCESS; 249 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 250 iwl_mvm_add_sta_cmd_size(mvm), 251 &add_sta_cmd, &status); 252 if (ret) 253 return ret; 254 255 switch (status & IWL_ADD_STA_STATUS_MASK) { 256 case ADD_STA_SUCCESS: 257 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 258 break; 259 default: 260 ret = -EIO; 261 IWL_ERR(mvm, "ADD_STA failed\n"); 262 break; 263 } 264 265 return ret; 266 } 267 268 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 269 { 270 struct iwl_mvm_baid_data *data = 271 from_timer(data, t, session_timer); 272 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 273 struct iwl_mvm_baid_data *ba_data; 274 struct ieee80211_sta *sta; 275 struct iwl_mvm_sta *mvm_sta; 276 unsigned long timeout; 277 278 rcu_read_lock(); 279 280 ba_data = rcu_dereference(*rcu_ptr); 281 282 if (WARN_ON(!ba_data)) 283 goto unlock; 284 285 if (!ba_data->timeout) 286 goto unlock; 287 288 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 289 if (time_is_after_jiffies(timeout)) { 290 mod_timer(&ba_data->session_timer, timeout); 291 goto unlock; 292 } 293 294 /* Timer expired */ 295 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 296 297 /* 298 * sta should be valid unless the following happens: 299 * The firmware asserts which triggers a reconfig flow, but 300 * the reconfig fails before we set the pointer to sta into 301 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 302 * A-MDPU and hence the timer continues to run. Then, the 303 * timer expires and sta is NULL. 304 */ 305 if (!sta) 306 goto unlock; 307 308 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 309 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 310 sta->addr, ba_data->tid); 311 unlock: 312 rcu_read_unlock(); 313 } 314 315 /* Disable aggregations for a bitmap of TIDs for a given station */ 316 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 317 unsigned long disable_agg_tids, 318 bool remove_queue) 319 { 320 struct iwl_mvm_add_sta_cmd cmd = {}; 321 struct ieee80211_sta *sta; 322 struct iwl_mvm_sta *mvmsta; 323 u32 status; 324 u8 sta_id; 325 326 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 327 return -EINVAL; 328 329 sta_id = mvm->queue_info[queue].ra_sta_id; 330 331 rcu_read_lock(); 332 333 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 334 335 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 336 rcu_read_unlock(); 337 return -EINVAL; 338 } 339 340 mvmsta = iwl_mvm_sta_from_mac80211(sta); 341 342 mvmsta->tid_disable_agg |= disable_agg_tids; 343 344 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 345 cmd.sta_id = mvmsta->sta_id; 346 cmd.add_modify = STA_MODE_MODIFY; 347 cmd.modify_mask = STA_MODIFY_QUEUES; 348 if (disable_agg_tids) 349 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 350 if (remove_queue) 351 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 352 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 353 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 354 355 rcu_read_unlock(); 356 357 /* Notify FW of queue removal from the STA queues */ 358 status = ADD_STA_SUCCESS; 359 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 360 iwl_mvm_add_sta_cmd_size(mvm), 361 &cmd, &status); 362 } 363 364 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 365 int queue, u8 tid, u8 flags) 366 { 367 struct iwl_scd_txq_cfg_cmd cmd = { 368 .scd_queue = queue, 369 .action = SCD_CFG_DISABLE_QUEUE, 370 }; 371 int ret; 372 373 if (iwl_mvm_has_new_tx_api(mvm)) { 374 iwl_trans_txq_free(mvm->trans, queue); 375 376 return 0; 377 } 378 379 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 380 return 0; 381 382 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 383 384 cmd.action = mvm->queue_info[queue].tid_bitmap ? 385 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 386 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 387 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 388 389 IWL_DEBUG_TX_QUEUES(mvm, 390 "Disabling TXQ #%d tids=0x%x\n", 391 queue, 392 mvm->queue_info[queue].tid_bitmap); 393 394 /* If the queue is still enabled - nothing left to do in this func */ 395 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 396 return 0; 397 398 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 399 cmd.tid = mvm->queue_info[queue].txq_tid; 400 401 /* Make sure queue info is correct even though we overwrite it */ 402 WARN(mvm->queue_info[queue].tid_bitmap, 403 "TXQ #%d info out-of-sync - tids=0x%x\n", 404 queue, mvm->queue_info[queue].tid_bitmap); 405 406 /* If we are here - the queue is freed and we can zero out these vals */ 407 mvm->queue_info[queue].tid_bitmap = 0; 408 409 if (sta) { 410 struct iwl_mvm_txq *mvmtxq = 411 iwl_mvm_txq_from_tid(sta, tid); 412 413 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 414 } 415 416 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 417 mvm->queue_info[queue].reserved = false; 418 419 iwl_trans_txq_disable(mvm->trans, queue, false); 420 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 421 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 422 423 if (ret) 424 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 425 queue, ret); 426 return ret; 427 } 428 429 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 430 { 431 struct ieee80211_sta *sta; 432 struct iwl_mvm_sta *mvmsta; 433 unsigned long tid_bitmap; 434 unsigned long agg_tids = 0; 435 u8 sta_id; 436 int tid; 437 438 lockdep_assert_held(&mvm->mutex); 439 440 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 441 return -EINVAL; 442 443 sta_id = mvm->queue_info[queue].ra_sta_id; 444 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 445 446 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 447 lockdep_is_held(&mvm->mutex)); 448 449 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 450 return -EINVAL; 451 452 mvmsta = iwl_mvm_sta_from_mac80211(sta); 453 454 spin_lock_bh(&mvmsta->lock); 455 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 456 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 457 agg_tids |= BIT(tid); 458 } 459 spin_unlock_bh(&mvmsta->lock); 460 461 return agg_tids; 462 } 463 464 /* 465 * Remove a queue from a station's resources. 466 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 467 * doesn't disable the queue 468 */ 469 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 470 { 471 struct ieee80211_sta *sta; 472 struct iwl_mvm_sta *mvmsta; 473 unsigned long tid_bitmap; 474 unsigned long disable_agg_tids = 0; 475 u8 sta_id; 476 int tid; 477 478 lockdep_assert_held(&mvm->mutex); 479 480 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 481 return -EINVAL; 482 483 sta_id = mvm->queue_info[queue].ra_sta_id; 484 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 485 486 rcu_read_lock(); 487 488 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 489 490 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 491 rcu_read_unlock(); 492 return 0; 493 } 494 495 mvmsta = iwl_mvm_sta_from_mac80211(sta); 496 497 spin_lock_bh(&mvmsta->lock); 498 /* Unmap MAC queues and TIDs from this queue */ 499 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 500 struct iwl_mvm_txq *mvmtxq = 501 iwl_mvm_txq_from_tid(sta, tid); 502 503 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 504 disable_agg_tids |= BIT(tid); 505 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 506 507 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 508 } 509 510 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 511 spin_unlock_bh(&mvmsta->lock); 512 513 rcu_read_unlock(); 514 515 /* 516 * The TX path may have been using this TXQ_ID from the tid_data, 517 * so make sure it's no longer running so that we can safely reuse 518 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 519 * above, but nothing guarantees we've stopped using them. Thus, 520 * without this, we could get to iwl_mvm_disable_txq() and remove 521 * the queue while still sending frames to it. 522 */ 523 synchronize_net(); 524 525 return disable_agg_tids; 526 } 527 528 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 529 struct ieee80211_sta *old_sta, 530 u8 new_sta_id) 531 { 532 struct iwl_mvm_sta *mvmsta; 533 u8 sta_id, tid; 534 unsigned long disable_agg_tids = 0; 535 bool same_sta; 536 int ret; 537 538 lockdep_assert_held(&mvm->mutex); 539 540 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 541 return -EINVAL; 542 543 sta_id = mvm->queue_info[queue].ra_sta_id; 544 tid = mvm->queue_info[queue].txq_tid; 545 546 same_sta = sta_id == new_sta_id; 547 548 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 549 if (WARN_ON(!mvmsta)) 550 return -EINVAL; 551 552 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 553 /* Disable the queue */ 554 if (disable_agg_tids) 555 iwl_mvm_invalidate_sta_queue(mvm, queue, 556 disable_agg_tids, false); 557 558 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 559 if (ret) { 560 IWL_ERR(mvm, 561 "Failed to free inactive queue %d (ret=%d)\n", 562 queue, ret); 563 564 return ret; 565 } 566 567 /* If TXQ is allocated to another STA, update removal in FW */ 568 if (!same_sta) 569 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 570 571 return 0; 572 } 573 574 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 575 unsigned long tfd_queue_mask, u8 ac) 576 { 577 int queue = 0; 578 u8 ac_to_queue[IEEE80211_NUM_ACS]; 579 int i; 580 581 /* 582 * This protects us against grabbing a queue that's being reconfigured 583 * by the inactivity checker. 584 */ 585 lockdep_assert_held(&mvm->mutex); 586 587 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 588 return -EINVAL; 589 590 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 591 592 /* See what ACs the existing queues for this STA have */ 593 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 594 /* Only DATA queues can be shared */ 595 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 596 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 597 continue; 598 599 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 600 } 601 602 /* 603 * The queue to share is chosen only from DATA queues as follows (in 604 * descending priority): 605 * 1. An AC_BE queue 606 * 2. Same AC queue 607 * 3. Highest AC queue that is lower than new AC 608 * 4. Any existing AC (there always is at least 1 DATA queue) 609 */ 610 611 /* Priority 1: An AC_BE queue */ 612 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 613 queue = ac_to_queue[IEEE80211_AC_BE]; 614 /* Priority 2: Same AC queue */ 615 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 616 queue = ac_to_queue[ac]; 617 /* Priority 3a: If new AC is VO and VI exists - use VI */ 618 else if (ac == IEEE80211_AC_VO && 619 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 620 queue = ac_to_queue[IEEE80211_AC_VI]; 621 /* Priority 3b: No BE so only AC less than the new one is BK */ 622 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 623 queue = ac_to_queue[IEEE80211_AC_BK]; 624 /* Priority 4a: No BE nor BK - use VI if exists */ 625 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 626 queue = ac_to_queue[IEEE80211_AC_VI]; 627 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 628 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 629 queue = ac_to_queue[IEEE80211_AC_VO]; 630 631 /* Make sure queue found (or not) is legal */ 632 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 633 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 634 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 635 IWL_ERR(mvm, "No DATA queues available to share\n"); 636 return -ENOSPC; 637 } 638 639 return queue; 640 } 641 642 /* 643 * If a given queue has a higher AC than the TID stream that is being compared 644 * to, the queue needs to be redirected to the lower AC. This function does that 645 * in such a case, otherwise - if no redirection required - it does nothing, 646 * unless the %force param is true. 647 */ 648 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 649 int ac, int ssn, unsigned int wdg_timeout, 650 bool force, struct iwl_mvm_txq *txq) 651 { 652 struct iwl_scd_txq_cfg_cmd cmd = { 653 .scd_queue = queue, 654 .action = SCD_CFG_DISABLE_QUEUE, 655 }; 656 bool shared_queue; 657 int ret; 658 659 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 660 return -EINVAL; 661 662 /* 663 * If the AC is lower than current one - FIFO needs to be redirected to 664 * the lowest one of the streams in the queue. Check if this is needed 665 * here. 666 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 667 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 668 * we need to check if the numerical value of X is LARGER than of Y. 669 */ 670 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 671 IWL_DEBUG_TX_QUEUES(mvm, 672 "No redirection needed on TXQ #%d\n", 673 queue); 674 return 0; 675 } 676 677 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 678 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 679 cmd.tid = mvm->queue_info[queue].txq_tid; 680 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 681 682 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 683 queue, iwl_mvm_ac_to_tx_fifo[ac]); 684 685 /* Stop the queue and wait for it to empty */ 686 txq->stopped = true; 687 688 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 689 if (ret) { 690 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 691 queue); 692 ret = -EIO; 693 goto out; 694 } 695 696 /* Before redirecting the queue we need to de-activate it */ 697 iwl_trans_txq_disable(mvm->trans, queue, false); 698 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 699 if (ret) 700 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 701 ret); 702 703 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 704 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 705 706 /* Update the TID "owner" of the queue */ 707 mvm->queue_info[queue].txq_tid = tid; 708 709 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 710 711 /* Redirect to lower AC */ 712 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 713 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 714 715 /* Update AC marking of the queue */ 716 mvm->queue_info[queue].mac80211_ac = ac; 717 718 /* 719 * Mark queue as shared in transport if shared 720 * Note this has to be done after queue enablement because enablement 721 * can also set this value, and there is no indication there to shared 722 * queues 723 */ 724 if (shared_queue) 725 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 726 727 out: 728 /* Continue using the queue */ 729 txq->stopped = false; 730 731 return ret; 732 } 733 734 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 735 u8 minq, u8 maxq) 736 { 737 int i; 738 739 lockdep_assert_held(&mvm->mutex); 740 741 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues, 742 "max queue %d >= num_of_queues (%d)", maxq, 743 mvm->trans->trans_cfg->base_params->num_of_queues)) 744 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1; 745 746 /* This should not be hit with new TX path */ 747 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 748 return -ENOSPC; 749 750 /* Start by looking for a free queue */ 751 for (i = minq; i <= maxq; i++) 752 if (mvm->queue_info[i].tid_bitmap == 0 && 753 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 754 return i; 755 756 return -ENOSPC; 757 } 758 759 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 760 u8 sta_id, u8 tid, unsigned int timeout) 761 { 762 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE, 763 mvm->trans->cfg->min_256_ba_txq_size); 764 765 if (tid == IWL_MAX_TID_COUNT) { 766 tid = IWL_MGMT_TID; 767 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 768 mvm->trans->cfg->min_txq_size); 769 } 770 771 do { 772 __le16 enable = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE); 773 774 queue = iwl_trans_txq_alloc(mvm->trans, enable, 775 sta_id, tid, SCD_QUEUE_CFG, 776 size, timeout); 777 778 if (queue < 0) 779 IWL_DEBUG_TX_QUEUES(mvm, 780 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n", 781 size, sta_id, tid, queue); 782 size /= 2; 783 } while (queue < 0 && size >= 16); 784 785 if (queue < 0) 786 return queue; 787 788 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 789 queue, sta_id, tid); 790 791 return queue; 792 } 793 794 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 795 struct ieee80211_sta *sta, u8 ac, 796 int tid) 797 { 798 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 799 struct iwl_mvm_txq *mvmtxq = 800 iwl_mvm_txq_from_tid(sta, tid); 801 unsigned int wdg_timeout = 802 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 803 int queue = -1; 804 805 lockdep_assert_held(&mvm->mutex); 806 807 IWL_DEBUG_TX_QUEUES(mvm, 808 "Allocating queue for sta %d on tid %d\n", 809 mvmsta->sta_id, tid); 810 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 811 if (queue < 0) 812 return queue; 813 814 mvmtxq->txq_id = queue; 815 mvm->tvqm_info[queue].txq_tid = tid; 816 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 817 818 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 819 820 spin_lock_bh(&mvmsta->lock); 821 mvmsta->tid_data[tid].txq_id = queue; 822 spin_unlock_bh(&mvmsta->lock); 823 824 return 0; 825 } 826 827 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 828 struct ieee80211_sta *sta, 829 int queue, u8 sta_id, u8 tid) 830 { 831 bool enable_queue = true; 832 833 /* Make sure this TID isn't already enabled */ 834 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 835 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 836 queue, tid); 837 return false; 838 } 839 840 /* Update mappings and refcounts */ 841 if (mvm->queue_info[queue].tid_bitmap) 842 enable_queue = false; 843 844 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 845 mvm->queue_info[queue].ra_sta_id = sta_id; 846 847 if (enable_queue) { 848 if (tid != IWL_MAX_TID_COUNT) 849 mvm->queue_info[queue].mac80211_ac = 850 tid_to_mac80211_ac[tid]; 851 else 852 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 853 854 mvm->queue_info[queue].txq_tid = tid; 855 } 856 857 if (sta) { 858 struct iwl_mvm_txq *mvmtxq = 859 iwl_mvm_txq_from_tid(sta, tid); 860 861 mvmtxq->txq_id = queue; 862 } 863 864 IWL_DEBUG_TX_QUEUES(mvm, 865 "Enabling TXQ #%d tids=0x%x\n", 866 queue, mvm->queue_info[queue].tid_bitmap); 867 868 return enable_queue; 869 } 870 871 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 872 int queue, u16 ssn, 873 const struct iwl_trans_txq_scd_cfg *cfg, 874 unsigned int wdg_timeout) 875 { 876 struct iwl_scd_txq_cfg_cmd cmd = { 877 .scd_queue = queue, 878 .action = SCD_CFG_ENABLE_QUEUE, 879 .window = cfg->frame_limit, 880 .sta_id = cfg->sta_id, 881 .ssn = cpu_to_le16(ssn), 882 .tx_fifo = cfg->fifo, 883 .aggregate = cfg->aggregate, 884 .tid = cfg->tid, 885 }; 886 bool inc_ssn; 887 888 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 889 return false; 890 891 /* Send the enabling command if we need to */ 892 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 893 return false; 894 895 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 896 NULL, wdg_timeout); 897 if (inc_ssn) 898 le16_add_cpu(&cmd.ssn, 1); 899 900 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 901 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 902 903 return inc_ssn; 904 } 905 906 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 907 { 908 struct iwl_scd_txq_cfg_cmd cmd = { 909 .scd_queue = queue, 910 .action = SCD_CFG_UPDATE_QUEUE_TID, 911 }; 912 int tid; 913 unsigned long tid_bitmap; 914 int ret; 915 916 lockdep_assert_held(&mvm->mutex); 917 918 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 919 return; 920 921 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 922 923 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 924 return; 925 926 /* Find any TID for queue */ 927 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 928 cmd.tid = tid; 929 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 930 931 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 932 if (ret) { 933 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 934 queue, ret); 935 return; 936 } 937 938 mvm->queue_info[queue].txq_tid = tid; 939 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 940 queue, tid); 941 } 942 943 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 944 { 945 struct ieee80211_sta *sta; 946 struct iwl_mvm_sta *mvmsta; 947 u8 sta_id; 948 int tid = -1; 949 unsigned long tid_bitmap; 950 unsigned int wdg_timeout; 951 int ssn; 952 int ret = true; 953 954 /* queue sharing is disabled on new TX path */ 955 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 956 return; 957 958 lockdep_assert_held(&mvm->mutex); 959 960 sta_id = mvm->queue_info[queue].ra_sta_id; 961 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 962 963 /* Find TID for queue, and make sure it is the only one on the queue */ 964 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 965 if (tid_bitmap != BIT(tid)) { 966 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 967 queue, tid_bitmap); 968 return; 969 } 970 971 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 972 tid); 973 974 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 975 lockdep_is_held(&mvm->mutex)); 976 977 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 978 return; 979 980 mvmsta = iwl_mvm_sta_from_mac80211(sta); 981 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 982 983 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 984 985 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 986 tid_to_mac80211_ac[tid], ssn, 987 wdg_timeout, true, 988 iwl_mvm_txq_from_tid(sta, tid)); 989 if (ret) { 990 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 991 return; 992 } 993 994 /* If aggs should be turned back on - do it */ 995 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 996 struct iwl_mvm_add_sta_cmd cmd = {0}; 997 998 mvmsta->tid_disable_agg &= ~BIT(tid); 999 1000 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1001 cmd.sta_id = mvmsta->sta_id; 1002 cmd.add_modify = STA_MODE_MODIFY; 1003 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1004 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1005 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1006 1007 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1008 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1009 if (!ret) { 1010 IWL_DEBUG_TX_QUEUES(mvm, 1011 "TXQ #%d is now aggregated again\n", 1012 queue); 1013 1014 /* Mark queue intenally as aggregating again */ 1015 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1016 } 1017 } 1018 1019 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1020 } 1021 1022 /* 1023 * Remove inactive TIDs of a given queue. 1024 * If all queue TIDs are inactive - mark the queue as inactive 1025 * If only some the queue TIDs are inactive - unmap them from the queue 1026 * 1027 * Returns %true if all TIDs were removed and the queue could be reused. 1028 */ 1029 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1030 struct iwl_mvm_sta *mvmsta, int queue, 1031 unsigned long tid_bitmap, 1032 unsigned long *unshare_queues, 1033 unsigned long *changetid_queues) 1034 { 1035 int tid; 1036 1037 lockdep_assert_held(&mvmsta->lock); 1038 lockdep_assert_held(&mvm->mutex); 1039 1040 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1041 return false; 1042 1043 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1044 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1045 /* If some TFDs are still queued - don't mark TID as inactive */ 1046 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1047 tid_bitmap &= ~BIT(tid); 1048 1049 /* Don't mark as inactive any TID that has an active BA */ 1050 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1051 tid_bitmap &= ~BIT(tid); 1052 } 1053 1054 /* If all TIDs in the queue are inactive - return it can be reused */ 1055 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1056 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1057 return true; 1058 } 1059 1060 /* 1061 * If we are here, this is a shared queue and not all TIDs timed-out. 1062 * Remove the ones that did. 1063 */ 1064 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1065 u16 tid_bitmap; 1066 1067 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1068 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1069 1070 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1071 1072 /* 1073 * We need to take into account a situation in which a TXQ was 1074 * allocated to TID x, and then turned shared by adding TIDs y 1075 * and z. If TID x becomes inactive and is removed from the TXQ, 1076 * ownership must be given to one of the remaining TIDs. 1077 * This is mainly because if TID x continues - a new queue can't 1078 * be allocated for it as long as it is an owner of another TXQ. 1079 * 1080 * Mark this queue in the right bitmap, we'll send the command 1081 * to the firmware later. 1082 */ 1083 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1084 set_bit(queue, changetid_queues); 1085 1086 IWL_DEBUG_TX_QUEUES(mvm, 1087 "Removing inactive TID %d from shared Q:%d\n", 1088 tid, queue); 1089 } 1090 1091 IWL_DEBUG_TX_QUEUES(mvm, 1092 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1093 mvm->queue_info[queue].tid_bitmap); 1094 1095 /* 1096 * There may be different TIDs with the same mac queues, so make 1097 * sure all TIDs have existing corresponding mac queues enabled 1098 */ 1099 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1100 1101 /* If the queue is marked as shared - "unshare" it */ 1102 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1103 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1104 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1105 queue); 1106 set_bit(queue, unshare_queues); 1107 } 1108 1109 return false; 1110 } 1111 1112 /* 1113 * Check for inactivity - this includes checking if any queue 1114 * can be unshared and finding one (and only one) that can be 1115 * reused. 1116 * This function is also invoked as a sort of clean-up task, 1117 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1118 * 1119 * Returns the queue number, or -ENOSPC. 1120 */ 1121 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1122 { 1123 unsigned long now = jiffies; 1124 unsigned long unshare_queues = 0; 1125 unsigned long changetid_queues = 0; 1126 int i, ret, free_queue = -ENOSPC; 1127 struct ieee80211_sta *queue_owner = NULL; 1128 1129 lockdep_assert_held(&mvm->mutex); 1130 1131 if (iwl_mvm_has_new_tx_api(mvm)) 1132 return -ENOSPC; 1133 1134 rcu_read_lock(); 1135 1136 /* we skip the CMD queue below by starting at 1 */ 1137 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1138 1139 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1140 struct ieee80211_sta *sta; 1141 struct iwl_mvm_sta *mvmsta; 1142 u8 sta_id; 1143 int tid; 1144 unsigned long inactive_tid_bitmap = 0; 1145 unsigned long queue_tid_bitmap; 1146 1147 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1148 if (!queue_tid_bitmap) 1149 continue; 1150 1151 /* If TXQ isn't in active use anyway - nothing to do here... */ 1152 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1153 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1154 continue; 1155 1156 /* Check to see if there are inactive TIDs on this queue */ 1157 for_each_set_bit(tid, &queue_tid_bitmap, 1158 IWL_MAX_TID_COUNT + 1) { 1159 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1160 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1161 continue; 1162 1163 inactive_tid_bitmap |= BIT(tid); 1164 } 1165 1166 /* If all TIDs are active - finish check on this queue */ 1167 if (!inactive_tid_bitmap) 1168 continue; 1169 1170 /* 1171 * If we are here - the queue hadn't been served recently and is 1172 * in use 1173 */ 1174 1175 sta_id = mvm->queue_info[i].ra_sta_id; 1176 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1177 1178 /* 1179 * If the STA doesn't exist anymore, it isn't an error. It could 1180 * be that it was removed since getting the queues, and in this 1181 * case it should've inactivated its queues anyway. 1182 */ 1183 if (IS_ERR_OR_NULL(sta)) 1184 continue; 1185 1186 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1187 1188 spin_lock_bh(&mvmsta->lock); 1189 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1190 inactive_tid_bitmap, 1191 &unshare_queues, 1192 &changetid_queues); 1193 if (ret && free_queue < 0) { 1194 queue_owner = sta; 1195 free_queue = i; 1196 } 1197 /* only unlock sta lock - we still need the queue info lock */ 1198 spin_unlock_bh(&mvmsta->lock); 1199 } 1200 1201 1202 /* Reconfigure queues requiring reconfiguation */ 1203 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1204 iwl_mvm_unshare_queue(mvm, i); 1205 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1206 iwl_mvm_change_queue_tid(mvm, i); 1207 1208 rcu_read_unlock(); 1209 1210 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1211 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1212 alloc_for_sta); 1213 if (ret) 1214 return ret; 1215 } 1216 1217 return free_queue; 1218 } 1219 1220 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1221 struct ieee80211_sta *sta, u8 ac, int tid) 1222 { 1223 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1224 struct iwl_trans_txq_scd_cfg cfg = { 1225 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1226 .sta_id = mvmsta->sta_id, 1227 .tid = tid, 1228 .frame_limit = IWL_FRAME_LIMIT, 1229 }; 1230 unsigned int wdg_timeout = 1231 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1232 int queue = -1; 1233 unsigned long disable_agg_tids = 0; 1234 enum iwl_mvm_agg_state queue_state; 1235 bool shared_queue = false, inc_ssn; 1236 int ssn; 1237 unsigned long tfd_queue_mask; 1238 int ret; 1239 1240 lockdep_assert_held(&mvm->mutex); 1241 1242 if (iwl_mvm_has_new_tx_api(mvm)) 1243 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1244 1245 spin_lock_bh(&mvmsta->lock); 1246 tfd_queue_mask = mvmsta->tfd_queue_msk; 1247 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1248 spin_unlock_bh(&mvmsta->lock); 1249 1250 if (tid == IWL_MAX_TID_COUNT) { 1251 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1252 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1253 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1254 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1255 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1256 queue); 1257 1258 /* If no such queue is found, we'll use a DATA queue instead */ 1259 } 1260 1261 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1262 (mvm->queue_info[mvmsta->reserved_queue].status == 1263 IWL_MVM_QUEUE_RESERVED)) { 1264 queue = mvmsta->reserved_queue; 1265 mvm->queue_info[queue].reserved = true; 1266 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1267 } 1268 1269 if (queue < 0) 1270 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1271 IWL_MVM_DQA_MIN_DATA_QUEUE, 1272 IWL_MVM_DQA_MAX_DATA_QUEUE); 1273 if (queue < 0) { 1274 /* try harder - perhaps kill an inactive queue */ 1275 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1276 } 1277 1278 /* No free queue - we'll have to share */ 1279 if (queue <= 0) { 1280 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1281 if (queue > 0) { 1282 shared_queue = true; 1283 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1284 } 1285 } 1286 1287 /* 1288 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1289 * to make sure no one else takes it. 1290 * This will allow avoiding re-acquiring the lock at the end of the 1291 * configuration. On error we'll mark it back as free. 1292 */ 1293 if (queue > 0 && !shared_queue) 1294 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1295 1296 /* This shouldn't happen - out of queues */ 1297 if (WARN_ON(queue <= 0)) { 1298 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1299 tid, cfg.sta_id); 1300 return queue; 1301 } 1302 1303 /* 1304 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1305 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1306 * as aggregatable. 1307 * Mark all DATA queues as allowing to be aggregated at some point 1308 */ 1309 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1310 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1311 1312 IWL_DEBUG_TX_QUEUES(mvm, 1313 "Allocating %squeue #%d to sta %d on tid %d\n", 1314 shared_queue ? "shared " : "", queue, 1315 mvmsta->sta_id, tid); 1316 1317 if (shared_queue) { 1318 /* Disable any open aggs on this queue */ 1319 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1320 1321 if (disable_agg_tids) { 1322 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1323 queue); 1324 iwl_mvm_invalidate_sta_queue(mvm, queue, 1325 disable_agg_tids, false); 1326 } 1327 } 1328 1329 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1330 1331 /* 1332 * Mark queue as shared in transport if shared 1333 * Note this has to be done after queue enablement because enablement 1334 * can also set this value, and there is no indication there to shared 1335 * queues 1336 */ 1337 if (shared_queue) 1338 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1339 1340 spin_lock_bh(&mvmsta->lock); 1341 /* 1342 * This looks racy, but it is not. We have only one packet for 1343 * this ra/tid in our Tx path since we stop the Qdisc when we 1344 * need to allocate a new TFD queue. 1345 */ 1346 if (inc_ssn) { 1347 mvmsta->tid_data[tid].seq_number += 0x10; 1348 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1349 } 1350 mvmsta->tid_data[tid].txq_id = queue; 1351 mvmsta->tfd_queue_msk |= BIT(queue); 1352 queue_state = mvmsta->tid_data[tid].state; 1353 1354 if (mvmsta->reserved_queue == queue) 1355 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1356 spin_unlock_bh(&mvmsta->lock); 1357 1358 if (!shared_queue) { 1359 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1360 if (ret) 1361 goto out_err; 1362 1363 /* If we need to re-enable aggregations... */ 1364 if (queue_state == IWL_AGG_ON) { 1365 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1366 if (ret) 1367 goto out_err; 1368 } 1369 } else { 1370 /* Redirect queue, if needed */ 1371 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1372 wdg_timeout, false, 1373 iwl_mvm_txq_from_tid(sta, tid)); 1374 if (ret) 1375 goto out_err; 1376 } 1377 1378 return 0; 1379 1380 out_err: 1381 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1382 1383 return ret; 1384 } 1385 1386 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1387 { 1388 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1389 add_stream_wk); 1390 1391 mutex_lock(&mvm->mutex); 1392 1393 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1394 1395 while (!list_empty(&mvm->add_stream_txqs)) { 1396 struct iwl_mvm_txq *mvmtxq; 1397 struct ieee80211_txq *txq; 1398 u8 tid; 1399 1400 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1401 struct iwl_mvm_txq, list); 1402 1403 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1404 drv_priv); 1405 tid = txq->tid; 1406 if (tid == IEEE80211_NUM_TIDS) 1407 tid = IWL_MAX_TID_COUNT; 1408 1409 /* 1410 * We can't really do much here, but if this fails we can't 1411 * transmit anyway - so just don't transmit the frame etc. 1412 * and let them back up ... we've tried our best to allocate 1413 * a queue in the function itself. 1414 */ 1415 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1416 list_del_init(&mvmtxq->list); 1417 continue; 1418 } 1419 1420 list_del_init(&mvmtxq->list); 1421 local_bh_disable(); 1422 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1423 local_bh_enable(); 1424 } 1425 1426 mutex_unlock(&mvm->mutex); 1427 } 1428 1429 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1430 struct ieee80211_sta *sta, 1431 enum nl80211_iftype vif_type) 1432 { 1433 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1434 int queue; 1435 1436 /* queue reserving is disabled on new TX path */ 1437 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1438 return 0; 1439 1440 /* run the general cleanup/unsharing of queues */ 1441 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1442 1443 /* Make sure we have free resources for this STA */ 1444 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1445 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1446 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1447 IWL_MVM_QUEUE_FREE)) 1448 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1449 else 1450 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1451 IWL_MVM_DQA_MIN_DATA_QUEUE, 1452 IWL_MVM_DQA_MAX_DATA_QUEUE); 1453 if (queue < 0) { 1454 /* try again - this time kick out a queue if needed */ 1455 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1456 if (queue < 0) { 1457 IWL_ERR(mvm, "No available queues for new station\n"); 1458 return -ENOSPC; 1459 } 1460 } 1461 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1462 1463 mvmsta->reserved_queue = queue; 1464 1465 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1466 queue, mvmsta->sta_id); 1467 1468 return 0; 1469 } 1470 1471 /* 1472 * In DQA mode, after a HW restart the queues should be allocated as before, in 1473 * order to avoid race conditions when there are shared queues. This function 1474 * does the re-mapping and queue allocation. 1475 * 1476 * Note that re-enabling aggregations isn't done in this function. 1477 */ 1478 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1479 struct ieee80211_sta *sta) 1480 { 1481 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1482 unsigned int wdg = 1483 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1484 int i; 1485 struct iwl_trans_txq_scd_cfg cfg = { 1486 .sta_id = mvm_sta->sta_id, 1487 .frame_limit = IWL_FRAME_LIMIT, 1488 }; 1489 1490 /* Make sure reserved queue is still marked as such (if allocated) */ 1491 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1492 mvm->queue_info[mvm_sta->reserved_queue].status = 1493 IWL_MVM_QUEUE_RESERVED; 1494 1495 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1496 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1497 int txq_id = tid_data->txq_id; 1498 int ac; 1499 1500 if (txq_id == IWL_MVM_INVALID_QUEUE) 1501 continue; 1502 1503 ac = tid_to_mac80211_ac[i]; 1504 1505 if (iwl_mvm_has_new_tx_api(mvm)) { 1506 IWL_DEBUG_TX_QUEUES(mvm, 1507 "Re-mapping sta %d tid %d\n", 1508 mvm_sta->sta_id, i); 1509 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1510 i, wdg); 1511 /* 1512 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1513 * to try again later, we have no other good way of 1514 * failing here 1515 */ 1516 if (txq_id < 0) 1517 txq_id = IWL_MVM_INVALID_QUEUE; 1518 tid_data->txq_id = txq_id; 1519 1520 /* 1521 * Since we don't set the seq number after reset, and HW 1522 * sets it now, FW reset will cause the seq num to start 1523 * at 0 again, so driver will need to update it 1524 * internally as well, so it keeps in sync with real val 1525 */ 1526 tid_data->seq_number = 0; 1527 } else { 1528 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1529 1530 cfg.tid = i; 1531 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1532 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1533 txq_id == 1534 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1535 1536 IWL_DEBUG_TX_QUEUES(mvm, 1537 "Re-mapping sta %d tid %d to queue %d\n", 1538 mvm_sta->sta_id, i, txq_id); 1539 1540 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1541 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1542 } 1543 } 1544 } 1545 1546 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1547 struct iwl_mvm_int_sta *sta, 1548 const u8 *addr, 1549 u16 mac_id, u16 color) 1550 { 1551 struct iwl_mvm_add_sta_cmd cmd; 1552 int ret; 1553 u32 status = ADD_STA_SUCCESS; 1554 1555 lockdep_assert_held(&mvm->mutex); 1556 1557 memset(&cmd, 0, sizeof(cmd)); 1558 cmd.sta_id = sta->sta_id; 1559 1560 if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP, ADD_STA, 1561 0) >= 12 && 1562 sta->type == IWL_STA_AUX_ACTIVITY) 1563 cmd.mac_id_n_color = cpu_to_le32(mac_id); 1564 else 1565 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1566 color)); 1567 1568 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1569 cmd.station_type = sta->type; 1570 1571 if (!iwl_mvm_has_new_tx_api(mvm)) 1572 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1573 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1574 1575 if (addr) 1576 memcpy(cmd.addr, addr, ETH_ALEN); 1577 1578 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1579 iwl_mvm_add_sta_cmd_size(mvm), 1580 &cmd, &status); 1581 if (ret) 1582 return ret; 1583 1584 switch (status & IWL_ADD_STA_STATUS_MASK) { 1585 case ADD_STA_SUCCESS: 1586 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1587 return 0; 1588 default: 1589 ret = -EIO; 1590 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1591 status); 1592 break; 1593 } 1594 return ret; 1595 } 1596 1597 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1598 struct ieee80211_vif *vif, 1599 struct ieee80211_sta *sta) 1600 { 1601 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1602 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1603 struct iwl_mvm_rxq_dup_data *dup_data; 1604 int i, ret, sta_id; 1605 bool sta_update = false; 1606 unsigned int sta_flags = 0; 1607 1608 lockdep_assert_held(&mvm->mutex); 1609 1610 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1611 sta_id = iwl_mvm_find_free_sta_id(mvm, 1612 ieee80211_vif_type_p2p(vif)); 1613 else 1614 sta_id = mvm_sta->sta_id; 1615 1616 if (sta_id == IWL_MVM_INVALID_STA) 1617 return -ENOSPC; 1618 1619 spin_lock_init(&mvm_sta->lock); 1620 1621 /* if this is a HW restart re-alloc existing queues */ 1622 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1623 struct iwl_mvm_int_sta tmp_sta = { 1624 .sta_id = sta_id, 1625 .type = mvm_sta->sta_type, 1626 }; 1627 1628 /* 1629 * First add an empty station since allocating 1630 * a queue requires a valid station 1631 */ 1632 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1633 mvmvif->id, mvmvif->color); 1634 if (ret) 1635 goto err; 1636 1637 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1638 sta_update = true; 1639 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1640 goto update_fw; 1641 } 1642 1643 mvm_sta->sta_id = sta_id; 1644 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1645 mvmvif->color); 1646 mvm_sta->vif = vif; 1647 if (!mvm->trans->trans_cfg->gen2) 1648 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1649 else 1650 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1651 mvm_sta->tx_protection = 0; 1652 mvm_sta->tt_tx_protection = false; 1653 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1654 1655 /* HW restart, don't assume the memory has been zeroed */ 1656 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1657 mvm_sta->tfd_queue_msk = 0; 1658 1659 /* for HW restart - reset everything but the sequence number */ 1660 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1661 u16 seq = mvm_sta->tid_data[i].seq_number; 1662 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1663 mvm_sta->tid_data[i].seq_number = seq; 1664 1665 /* 1666 * Mark all queues for this STA as unallocated and defer TX 1667 * frames until the queue is allocated 1668 */ 1669 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1670 } 1671 1672 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1673 struct iwl_mvm_txq *mvmtxq = 1674 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1675 1676 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1677 INIT_LIST_HEAD(&mvmtxq->list); 1678 atomic_set(&mvmtxq->tx_request, 0); 1679 } 1680 1681 mvm_sta->agg_tids = 0; 1682 1683 if (iwl_mvm_has_new_rx_api(mvm) && 1684 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1685 int q; 1686 1687 dup_data = kcalloc(mvm->trans->num_rx_queues, 1688 sizeof(*dup_data), GFP_KERNEL); 1689 if (!dup_data) 1690 return -ENOMEM; 1691 /* 1692 * Initialize all the last_seq values to 0xffff which can never 1693 * compare equal to the frame's seq_ctrl in the check in 1694 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1695 * number and fragmented packets don't reach that function. 1696 * 1697 * This thus allows receiving a packet with seqno 0 and the 1698 * retry bit set as the very first packet on a new TID. 1699 */ 1700 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1701 memset(dup_data[q].last_seq, 0xff, 1702 sizeof(dup_data[q].last_seq)); 1703 mvm_sta->dup_data = dup_data; 1704 } 1705 1706 if (!iwl_mvm_has_new_tx_api(mvm)) { 1707 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1708 ieee80211_vif_type_p2p(vif)); 1709 if (ret) 1710 goto err; 1711 } 1712 1713 /* 1714 * if rs is registered with mac80211, then "add station" will be handled 1715 * via the corresponding ops, otherwise need to notify rate scaling here 1716 */ 1717 if (iwl_mvm_has_tlc_offload(mvm)) 1718 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1719 else 1720 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1721 1722 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1723 1724 update_fw: 1725 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1726 if (ret) 1727 goto err; 1728 1729 if (vif->type == NL80211_IFTYPE_STATION) { 1730 if (!sta->tdls) { 1731 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1732 mvmvif->ap_sta_id = sta_id; 1733 } else { 1734 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1735 } 1736 } 1737 1738 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1739 1740 return 0; 1741 1742 err: 1743 return ret; 1744 } 1745 1746 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1747 bool drain) 1748 { 1749 struct iwl_mvm_add_sta_cmd cmd = {}; 1750 int ret; 1751 u32 status; 1752 1753 lockdep_assert_held(&mvm->mutex); 1754 1755 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1756 cmd.sta_id = mvmsta->sta_id; 1757 cmd.add_modify = STA_MODE_MODIFY; 1758 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1759 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1760 1761 status = ADD_STA_SUCCESS; 1762 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1763 iwl_mvm_add_sta_cmd_size(mvm), 1764 &cmd, &status); 1765 if (ret) 1766 return ret; 1767 1768 switch (status & IWL_ADD_STA_STATUS_MASK) { 1769 case ADD_STA_SUCCESS: 1770 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1771 mvmsta->sta_id); 1772 break; 1773 default: 1774 ret = -EIO; 1775 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1776 mvmsta->sta_id); 1777 break; 1778 } 1779 1780 return ret; 1781 } 1782 1783 /* 1784 * Remove a station from the FW table. Before sending the command to remove 1785 * the station validate that the station is indeed known to the driver (sanity 1786 * only). 1787 */ 1788 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1789 { 1790 struct ieee80211_sta *sta; 1791 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1792 .sta_id = sta_id, 1793 }; 1794 int ret; 1795 1796 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1797 lockdep_is_held(&mvm->mutex)); 1798 1799 /* Note: internal stations are marked as error values */ 1800 if (!sta) { 1801 IWL_ERR(mvm, "Invalid station id\n"); 1802 return -EINVAL; 1803 } 1804 1805 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1806 sizeof(rm_sta_cmd), &rm_sta_cmd); 1807 if (ret) { 1808 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1809 return ret; 1810 } 1811 1812 return 0; 1813 } 1814 1815 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1816 struct ieee80211_vif *vif, 1817 struct ieee80211_sta *sta) 1818 { 1819 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1820 int i; 1821 1822 lockdep_assert_held(&mvm->mutex); 1823 1824 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1825 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1826 continue; 1827 1828 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1829 0); 1830 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1831 } 1832 1833 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1834 struct iwl_mvm_txq *mvmtxq = 1835 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1836 1837 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1838 } 1839 } 1840 1841 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1842 struct iwl_mvm_sta *mvm_sta) 1843 { 1844 int i; 1845 1846 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1847 u16 txq_id; 1848 int ret; 1849 1850 spin_lock_bh(&mvm_sta->lock); 1851 txq_id = mvm_sta->tid_data[i].txq_id; 1852 spin_unlock_bh(&mvm_sta->lock); 1853 1854 if (txq_id == IWL_MVM_INVALID_QUEUE) 1855 continue; 1856 1857 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1858 if (ret) 1859 return ret; 1860 } 1861 1862 return 0; 1863 } 1864 1865 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1866 struct ieee80211_vif *vif, 1867 struct ieee80211_sta *sta) 1868 { 1869 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1870 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1871 u8 sta_id = mvm_sta->sta_id; 1872 int ret; 1873 1874 lockdep_assert_held(&mvm->mutex); 1875 1876 if (iwl_mvm_has_new_rx_api(mvm)) 1877 kfree(mvm_sta->dup_data); 1878 1879 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1880 if (ret) 1881 return ret; 1882 1883 /* flush its queues here since we are freeing mvm_sta */ 1884 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false); 1885 if (ret) 1886 return ret; 1887 if (iwl_mvm_has_new_tx_api(mvm)) { 1888 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1889 } else { 1890 u32 q_mask = mvm_sta->tfd_queue_msk; 1891 1892 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1893 q_mask); 1894 } 1895 if (ret) 1896 return ret; 1897 1898 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1899 1900 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1901 1902 /* If there is a TXQ still marked as reserved - free it */ 1903 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1904 u8 reserved_txq = mvm_sta->reserved_queue; 1905 enum iwl_mvm_queue_status *status; 1906 1907 /* 1908 * If no traffic has gone through the reserved TXQ - it 1909 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1910 * should be manually marked as free again 1911 */ 1912 status = &mvm->queue_info[reserved_txq].status; 1913 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1914 (*status != IWL_MVM_QUEUE_FREE), 1915 "sta_id %d reserved txq %d status %d", 1916 sta_id, reserved_txq, *status)) 1917 return -EINVAL; 1918 1919 *status = IWL_MVM_QUEUE_FREE; 1920 } 1921 1922 if (vif->type == NL80211_IFTYPE_STATION && 1923 mvmvif->ap_sta_id == sta_id) { 1924 /* if associated - we can't remove the AP STA now */ 1925 if (vif->bss_conf.assoc) 1926 return ret; 1927 1928 /* unassoc - go ahead - remove the AP STA now */ 1929 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1930 } 1931 1932 /* 1933 * This shouldn't happen - the TDLS channel switch should be canceled 1934 * before the STA is removed. 1935 */ 1936 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1937 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1938 cancel_delayed_work(&mvm->tdls_cs.dwork); 1939 } 1940 1941 /* 1942 * Make sure that the tx response code sees the station as -EBUSY and 1943 * calls the drain worker. 1944 */ 1945 spin_lock_bh(&mvm_sta->lock); 1946 spin_unlock_bh(&mvm_sta->lock); 1947 1948 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1949 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1950 1951 return ret; 1952 } 1953 1954 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1955 struct ieee80211_vif *vif, 1956 u8 sta_id) 1957 { 1958 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1959 1960 lockdep_assert_held(&mvm->mutex); 1961 1962 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1963 return ret; 1964 } 1965 1966 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1967 struct iwl_mvm_int_sta *sta, 1968 u32 qmask, enum nl80211_iftype iftype, 1969 enum iwl_sta_type type) 1970 { 1971 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1972 sta->sta_id == IWL_MVM_INVALID_STA) { 1973 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1974 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1975 return -ENOSPC; 1976 } 1977 1978 sta->tfd_queue_msk = qmask; 1979 sta->type = type; 1980 1981 /* put a non-NULL value so iterating over the stations won't stop */ 1982 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1983 return 0; 1984 } 1985 1986 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1987 { 1988 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1989 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1990 sta->sta_id = IWL_MVM_INVALID_STA; 1991 } 1992 1993 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 1994 u8 sta_id, u8 fifo) 1995 { 1996 unsigned int wdg_timeout = 1997 mvm->trans->trans_cfg->base_params->wd_timeout; 1998 struct iwl_trans_txq_scd_cfg cfg = { 1999 .fifo = fifo, 2000 .sta_id = sta_id, 2001 .tid = IWL_MAX_TID_COUNT, 2002 .aggregate = false, 2003 .frame_limit = IWL_FRAME_LIMIT, 2004 }; 2005 2006 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2007 2008 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2009 } 2010 2011 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 2012 { 2013 unsigned int wdg_timeout = 2014 mvm->trans->trans_cfg->base_params->wd_timeout; 2015 2016 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2017 2018 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 2019 wdg_timeout); 2020 } 2021 2022 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2023 int maccolor, u8 *addr, 2024 struct iwl_mvm_int_sta *sta, 2025 u16 *queue, int fifo) 2026 { 2027 int ret; 2028 2029 /* Map queue to fifo - needs to happen before adding station */ 2030 if (!iwl_mvm_has_new_tx_api(mvm)) 2031 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2032 2033 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor); 2034 if (ret) { 2035 if (!iwl_mvm_has_new_tx_api(mvm)) 2036 iwl_mvm_disable_txq(mvm, NULL, *queue, 2037 IWL_MAX_TID_COUNT, 0); 2038 return ret; 2039 } 2040 2041 /* 2042 * For 22000 firmware and on we cannot add queue to a station unknown 2043 * to firmware so enable queue here - after the station was added 2044 */ 2045 if (iwl_mvm_has_new_tx_api(mvm)) { 2046 int txq; 2047 2048 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2049 if (txq < 0) { 2050 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2051 return txq; 2052 } 2053 2054 *queue = txq; 2055 } 2056 2057 return 0; 2058 } 2059 2060 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id) 2061 { 2062 int ret; 2063 2064 lockdep_assert_held(&mvm->mutex); 2065 2066 /* Allocate aux station and assign to it the aux queue */ 2067 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2068 NL80211_IFTYPE_UNSPECIFIED, 2069 IWL_STA_AUX_ACTIVITY); 2070 if (ret) 2071 return ret; 2072 2073 /* 2074 * In CDB NICs we need to specify which lmac to use for aux activity 2075 * using the mac_id argument place to send lmac_id to the function 2076 */ 2077 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL, 2078 &mvm->aux_sta, &mvm->aux_queue, 2079 IWL_MVM_TX_FIFO_MCAST); 2080 if (ret) { 2081 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2082 return ret; 2083 } 2084 2085 return 0; 2086 } 2087 2088 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2089 { 2090 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2091 2092 lockdep_assert_held(&mvm->mutex); 2093 2094 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2095 NULL, &mvm->snif_sta, 2096 &mvm->snif_queue, 2097 IWL_MVM_TX_FIFO_BE); 2098 } 2099 2100 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2101 { 2102 int ret; 2103 2104 lockdep_assert_held(&mvm->mutex); 2105 2106 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2107 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2108 if (ret) 2109 IWL_WARN(mvm, "Failed sending remove station\n"); 2110 2111 return ret; 2112 } 2113 2114 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2115 { 2116 int ret; 2117 2118 lockdep_assert_held(&mvm->mutex); 2119 2120 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_queue, IWL_MAX_TID_COUNT, 0); 2121 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2122 if (ret) 2123 IWL_WARN(mvm, "Failed sending remove station\n"); 2124 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2125 2126 return ret; 2127 } 2128 2129 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2130 { 2131 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2132 } 2133 2134 /* 2135 * Send the add station command for the vif's broadcast station. 2136 * Assumes that the station was already allocated. 2137 * 2138 * @mvm: the mvm component 2139 * @vif: the interface to which the broadcast station is added 2140 * @bsta: the broadcast station to add. 2141 */ 2142 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2143 { 2144 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2145 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2146 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2147 const u8 *baddr = _baddr; 2148 int queue; 2149 int ret; 2150 unsigned int wdg_timeout = 2151 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2152 struct iwl_trans_txq_scd_cfg cfg = { 2153 .fifo = IWL_MVM_TX_FIFO_VO, 2154 .sta_id = mvmvif->bcast_sta.sta_id, 2155 .tid = IWL_MAX_TID_COUNT, 2156 .aggregate = false, 2157 .frame_limit = IWL_FRAME_LIMIT, 2158 }; 2159 2160 lockdep_assert_held(&mvm->mutex); 2161 2162 if (!iwl_mvm_has_new_tx_api(mvm)) { 2163 if (vif->type == NL80211_IFTYPE_AP || 2164 vif->type == NL80211_IFTYPE_ADHOC) { 2165 queue = mvm->probe_queue; 2166 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2167 queue = mvm->p2p_dev_queue; 2168 } else { 2169 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2170 return -EINVAL; 2171 } 2172 2173 bsta->tfd_queue_msk |= BIT(queue); 2174 2175 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2176 } 2177 2178 if (vif->type == NL80211_IFTYPE_ADHOC) 2179 baddr = vif->bss_conf.bssid; 2180 2181 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2182 return -ENOSPC; 2183 2184 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2185 mvmvif->id, mvmvif->color); 2186 if (ret) 2187 return ret; 2188 2189 /* 2190 * For 22000 firmware and on we cannot add queue to a station unknown 2191 * to firmware so enable queue here - after the station was added 2192 */ 2193 if (iwl_mvm_has_new_tx_api(mvm)) { 2194 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2195 IWL_MAX_TID_COUNT, 2196 wdg_timeout); 2197 if (queue < 0) { 2198 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2199 return queue; 2200 } 2201 2202 if (vif->type == NL80211_IFTYPE_AP || 2203 vif->type == NL80211_IFTYPE_ADHOC) 2204 mvm->probe_queue = queue; 2205 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2206 mvm->p2p_dev_queue = queue; 2207 } 2208 2209 return 0; 2210 } 2211 2212 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2213 struct ieee80211_vif *vif) 2214 { 2215 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2216 int queue; 2217 2218 lockdep_assert_held(&mvm->mutex); 2219 2220 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true); 2221 2222 switch (vif->type) { 2223 case NL80211_IFTYPE_AP: 2224 case NL80211_IFTYPE_ADHOC: 2225 queue = mvm->probe_queue; 2226 break; 2227 case NL80211_IFTYPE_P2P_DEVICE: 2228 queue = mvm->p2p_dev_queue; 2229 break; 2230 default: 2231 WARN(1, "Can't free bcast queue on vif type %d\n", 2232 vif->type); 2233 return; 2234 } 2235 2236 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2237 if (iwl_mvm_has_new_tx_api(mvm)) 2238 return; 2239 2240 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2241 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2242 } 2243 2244 /* Send the FW a request to remove the station from it's internal data 2245 * structures, but DO NOT remove the entry from the local data structures. */ 2246 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2247 { 2248 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2249 int ret; 2250 2251 lockdep_assert_held(&mvm->mutex); 2252 2253 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2254 2255 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2256 if (ret) 2257 IWL_WARN(mvm, "Failed sending remove station\n"); 2258 return ret; 2259 } 2260 2261 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2262 { 2263 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2264 2265 lockdep_assert_held(&mvm->mutex); 2266 2267 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2268 ieee80211_vif_type_p2p(vif), 2269 IWL_STA_GENERAL_PURPOSE); 2270 } 2271 2272 /* Allocate a new station entry for the broadcast station to the given vif, 2273 * and send it to the FW. 2274 * Note that each P2P mac should have its own broadcast station. 2275 * 2276 * @mvm: the mvm component 2277 * @vif: the interface to which the broadcast station is added 2278 * @bsta: the broadcast station to add. */ 2279 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2280 { 2281 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2282 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2283 int ret; 2284 2285 lockdep_assert_held(&mvm->mutex); 2286 2287 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2288 if (ret) 2289 return ret; 2290 2291 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2292 2293 if (ret) 2294 iwl_mvm_dealloc_int_sta(mvm, bsta); 2295 2296 return ret; 2297 } 2298 2299 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2300 { 2301 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2302 2303 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2304 } 2305 2306 /* 2307 * Send the FW a request to remove the station from it's internal data 2308 * structures, and in addition remove it from the local data structure. 2309 */ 2310 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2311 { 2312 int ret; 2313 2314 lockdep_assert_held(&mvm->mutex); 2315 2316 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2317 2318 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2319 2320 return ret; 2321 } 2322 2323 /* 2324 * Allocate a new station entry for the multicast station to the given vif, 2325 * and send it to the FW. 2326 * Note that each AP/GO mac should have its own multicast station. 2327 * 2328 * @mvm: the mvm component 2329 * @vif: the interface to which the multicast station is added 2330 */ 2331 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2332 { 2333 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2334 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2335 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2336 const u8 *maddr = _maddr; 2337 struct iwl_trans_txq_scd_cfg cfg = { 2338 .fifo = vif->type == NL80211_IFTYPE_AP ? 2339 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2340 .sta_id = msta->sta_id, 2341 .tid = 0, 2342 .aggregate = false, 2343 .frame_limit = IWL_FRAME_LIMIT, 2344 }; 2345 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2346 int ret; 2347 2348 lockdep_assert_held(&mvm->mutex); 2349 2350 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2351 vif->type != NL80211_IFTYPE_ADHOC)) 2352 return -ENOTSUPP; 2353 2354 /* 2355 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2356 * invalid, so make sure we use the queue we want. 2357 * Note that this is done here as we want to avoid making DQA 2358 * changes in mac80211 layer. 2359 */ 2360 if (vif->type == NL80211_IFTYPE_ADHOC) 2361 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2362 2363 /* 2364 * While in previous FWs we had to exclude cab queue from TFD queue 2365 * mask, now it is needed as any other queue. 2366 */ 2367 if (!iwl_mvm_has_new_tx_api(mvm) && 2368 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2369 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2370 timeout); 2371 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2372 } 2373 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2374 mvmvif->id, mvmvif->color); 2375 if (ret) 2376 goto err; 2377 2378 /* 2379 * Enable cab queue after the ADD_STA command is sent. 2380 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2381 * command with unknown station id, and for FW that doesn't support 2382 * station API since the cab queue is not included in the 2383 * tfd_queue_mask. 2384 */ 2385 if (iwl_mvm_has_new_tx_api(mvm)) { 2386 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2387 0, 2388 timeout); 2389 if (queue < 0) { 2390 ret = queue; 2391 goto err; 2392 } 2393 mvmvif->cab_queue = queue; 2394 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2395 IWL_UCODE_TLV_API_STA_TYPE)) 2396 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2397 timeout); 2398 2399 return 0; 2400 err: 2401 iwl_mvm_dealloc_int_sta(mvm, msta); 2402 return ret; 2403 } 2404 2405 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2406 struct ieee80211_key_conf *keyconf, 2407 bool mcast) 2408 { 2409 union { 2410 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2411 struct iwl_mvm_add_sta_key_cmd cmd; 2412 } u = {}; 2413 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2414 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2415 __le16 key_flags; 2416 int ret, size; 2417 u32 status; 2418 2419 /* This is a valid situation for GTK removal */ 2420 if (sta_id == IWL_MVM_INVALID_STA) 2421 return 0; 2422 2423 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2424 STA_KEY_FLG_KEYID_MSK); 2425 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2426 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2427 2428 if (mcast) 2429 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2430 2431 /* 2432 * The fields assigned here are in the same location at the start 2433 * of the command, so we can do this union trick. 2434 */ 2435 u.cmd.common.key_flags = key_flags; 2436 u.cmd.common.key_offset = keyconf->hw_key_idx; 2437 u.cmd.common.sta_id = sta_id; 2438 2439 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2440 2441 status = ADD_STA_SUCCESS; 2442 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2443 &status); 2444 2445 switch (status) { 2446 case ADD_STA_SUCCESS: 2447 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2448 break; 2449 default: 2450 ret = -EIO; 2451 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2452 break; 2453 } 2454 2455 return ret; 2456 } 2457 2458 /* 2459 * Send the FW a request to remove the station from it's internal data 2460 * structures, and in addition remove it from the local data structure. 2461 */ 2462 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2463 { 2464 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2465 int ret; 2466 2467 lockdep_assert_held(&mvm->mutex); 2468 2469 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true); 2470 2471 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2472 2473 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2474 if (ret) 2475 IWL_WARN(mvm, "Failed sending remove station\n"); 2476 2477 return ret; 2478 } 2479 2480 #define IWL_MAX_RX_BA_SESSIONS 16 2481 2482 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2483 { 2484 struct iwl_mvm_rss_sync_notif notif = { 2485 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2486 .metadata.sync = 1, 2487 .delba.baid = baid, 2488 }; 2489 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2490 }; 2491 2492 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2493 struct iwl_mvm_baid_data *data) 2494 { 2495 int i; 2496 2497 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2498 2499 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2500 int j; 2501 struct iwl_mvm_reorder_buffer *reorder_buf = 2502 &data->reorder_buf[i]; 2503 struct iwl_mvm_reorder_buf_entry *entries = 2504 &data->entries[i * data->entries_per_queue]; 2505 2506 spin_lock_bh(&reorder_buf->lock); 2507 if (likely(!reorder_buf->num_stored)) { 2508 spin_unlock_bh(&reorder_buf->lock); 2509 continue; 2510 } 2511 2512 /* 2513 * This shouldn't happen in regular DELBA since the internal 2514 * delBA notification should trigger a release of all frames in 2515 * the reorder buffer. 2516 */ 2517 WARN_ON(1); 2518 2519 for (j = 0; j < reorder_buf->buf_size; j++) 2520 __skb_queue_purge(&entries[j].e.frames); 2521 /* 2522 * Prevent timer re-arm. This prevents a very far fetched case 2523 * where we timed out on the notification. There may be prior 2524 * RX frames pending in the RX queue before the notification 2525 * that might get processed between now and the actual deletion 2526 * and we would re-arm the timer although we are deleting the 2527 * reorder buffer. 2528 */ 2529 reorder_buf->removed = true; 2530 spin_unlock_bh(&reorder_buf->lock); 2531 del_timer_sync(&reorder_buf->reorder_timer); 2532 } 2533 } 2534 2535 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2536 struct iwl_mvm_baid_data *data, 2537 u16 ssn, u16 buf_size) 2538 { 2539 int i; 2540 2541 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2542 struct iwl_mvm_reorder_buffer *reorder_buf = 2543 &data->reorder_buf[i]; 2544 struct iwl_mvm_reorder_buf_entry *entries = 2545 &data->entries[i * data->entries_per_queue]; 2546 int j; 2547 2548 reorder_buf->num_stored = 0; 2549 reorder_buf->head_sn = ssn; 2550 reorder_buf->buf_size = buf_size; 2551 /* rx reorder timer */ 2552 timer_setup(&reorder_buf->reorder_timer, 2553 iwl_mvm_reorder_timer_expired, 0); 2554 spin_lock_init(&reorder_buf->lock); 2555 reorder_buf->mvm = mvm; 2556 reorder_buf->queue = i; 2557 reorder_buf->valid = false; 2558 for (j = 0; j < reorder_buf->buf_size; j++) 2559 __skb_queue_head_init(&entries[j].e.frames); 2560 } 2561 } 2562 2563 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2564 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2565 { 2566 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2567 struct iwl_mvm_add_sta_cmd cmd = {}; 2568 struct iwl_mvm_baid_data *baid_data = NULL; 2569 int ret; 2570 u32 status; 2571 2572 lockdep_assert_held(&mvm->mutex); 2573 2574 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2575 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2576 return -ENOSPC; 2577 } 2578 2579 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2580 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2581 2582 /* sparse doesn't like the __align() so don't check */ 2583 #ifndef __CHECKER__ 2584 /* 2585 * The division below will be OK if either the cache line size 2586 * can be divided by the entry size (ALIGN will round up) or if 2587 * if the entry size can be divided by the cache line size, in 2588 * which case the ALIGN() will do nothing. 2589 */ 2590 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2591 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2592 #endif 2593 2594 /* 2595 * Upward align the reorder buffer size to fill an entire cache 2596 * line for each queue, to avoid sharing cache lines between 2597 * different queues. 2598 */ 2599 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2600 2601 /* 2602 * Allocate here so if allocation fails we can bail out early 2603 * before starting the BA session in the firmware 2604 */ 2605 baid_data = kzalloc(sizeof(*baid_data) + 2606 mvm->trans->num_rx_queues * 2607 reorder_buf_size, 2608 GFP_KERNEL); 2609 if (!baid_data) 2610 return -ENOMEM; 2611 2612 /* 2613 * This division is why we need the above BUILD_BUG_ON(), 2614 * if that doesn't hold then this will not be right. 2615 */ 2616 baid_data->entries_per_queue = 2617 reorder_buf_size / sizeof(baid_data->entries[0]); 2618 } 2619 2620 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2621 cmd.sta_id = mvm_sta->sta_id; 2622 cmd.add_modify = STA_MODE_MODIFY; 2623 if (start) { 2624 cmd.add_immediate_ba_tid = (u8) tid; 2625 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2626 cmd.rx_ba_window = cpu_to_le16(buf_size); 2627 } else { 2628 cmd.remove_immediate_ba_tid = (u8) tid; 2629 } 2630 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2631 STA_MODIFY_REMOVE_BA_TID; 2632 2633 status = ADD_STA_SUCCESS; 2634 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2635 iwl_mvm_add_sta_cmd_size(mvm), 2636 &cmd, &status); 2637 if (ret) 2638 goto out_free; 2639 2640 switch (status & IWL_ADD_STA_STATUS_MASK) { 2641 case ADD_STA_SUCCESS: 2642 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2643 start ? "start" : "stopp"); 2644 break; 2645 case ADD_STA_IMMEDIATE_BA_FAILURE: 2646 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2647 ret = -ENOSPC; 2648 break; 2649 default: 2650 ret = -EIO; 2651 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2652 start ? "start" : "stopp", status); 2653 break; 2654 } 2655 2656 if (ret) 2657 goto out_free; 2658 2659 if (start) { 2660 u8 baid; 2661 2662 mvm->rx_ba_sessions++; 2663 2664 if (!iwl_mvm_has_new_rx_api(mvm)) 2665 return 0; 2666 2667 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2668 ret = -EINVAL; 2669 goto out_free; 2670 } 2671 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2672 IWL_ADD_STA_BAID_SHIFT); 2673 baid_data->baid = baid; 2674 baid_data->timeout = timeout; 2675 baid_data->last_rx = jiffies; 2676 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2677 timer_setup(&baid_data->session_timer, 2678 iwl_mvm_rx_agg_session_expired, 0); 2679 baid_data->mvm = mvm; 2680 baid_data->tid = tid; 2681 baid_data->sta_id = mvm_sta->sta_id; 2682 2683 mvm_sta->tid_to_baid[tid] = baid; 2684 if (timeout) 2685 mod_timer(&baid_data->session_timer, 2686 TU_TO_EXP_TIME(timeout * 2)); 2687 2688 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2689 /* 2690 * protect the BA data with RCU to cover a case where our 2691 * internal RX sync mechanism will timeout (not that it's 2692 * supposed to happen) and we will free the session data while 2693 * RX is being processed in parallel 2694 */ 2695 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2696 mvm_sta->sta_id, tid, baid); 2697 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2698 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2699 } else { 2700 u8 baid = mvm_sta->tid_to_baid[tid]; 2701 2702 if (mvm->rx_ba_sessions > 0) 2703 /* check that restart flow didn't zero the counter */ 2704 mvm->rx_ba_sessions--; 2705 if (!iwl_mvm_has_new_rx_api(mvm)) 2706 return 0; 2707 2708 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2709 return -EINVAL; 2710 2711 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2712 if (WARN_ON(!baid_data)) 2713 return -EINVAL; 2714 2715 /* synchronize all rx queues so we can safely delete */ 2716 iwl_mvm_free_reorder(mvm, baid_data); 2717 del_timer_sync(&baid_data->session_timer); 2718 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2719 kfree_rcu(baid_data, rcu_head); 2720 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2721 } 2722 return 0; 2723 2724 out_free: 2725 kfree(baid_data); 2726 return ret; 2727 } 2728 2729 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2730 int tid, u8 queue, bool start) 2731 { 2732 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2733 struct iwl_mvm_add_sta_cmd cmd = {}; 2734 int ret; 2735 u32 status; 2736 2737 lockdep_assert_held(&mvm->mutex); 2738 2739 if (start) { 2740 mvm_sta->tfd_queue_msk |= BIT(queue); 2741 mvm_sta->tid_disable_agg &= ~BIT(tid); 2742 } else { 2743 /* In DQA-mode the queue isn't removed on agg termination */ 2744 mvm_sta->tid_disable_agg |= BIT(tid); 2745 } 2746 2747 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2748 cmd.sta_id = mvm_sta->sta_id; 2749 cmd.add_modify = STA_MODE_MODIFY; 2750 if (!iwl_mvm_has_new_tx_api(mvm)) 2751 cmd.modify_mask = STA_MODIFY_QUEUES; 2752 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2753 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2754 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2755 2756 status = ADD_STA_SUCCESS; 2757 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2758 iwl_mvm_add_sta_cmd_size(mvm), 2759 &cmd, &status); 2760 if (ret) 2761 return ret; 2762 2763 switch (status & IWL_ADD_STA_STATUS_MASK) { 2764 case ADD_STA_SUCCESS: 2765 break; 2766 default: 2767 ret = -EIO; 2768 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2769 start ? "start" : "stopp", status); 2770 break; 2771 } 2772 2773 return ret; 2774 } 2775 2776 const u8 tid_to_mac80211_ac[] = { 2777 IEEE80211_AC_BE, 2778 IEEE80211_AC_BK, 2779 IEEE80211_AC_BK, 2780 IEEE80211_AC_BE, 2781 IEEE80211_AC_VI, 2782 IEEE80211_AC_VI, 2783 IEEE80211_AC_VO, 2784 IEEE80211_AC_VO, 2785 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2786 }; 2787 2788 static const u8 tid_to_ucode_ac[] = { 2789 AC_BE, 2790 AC_BK, 2791 AC_BK, 2792 AC_BE, 2793 AC_VI, 2794 AC_VI, 2795 AC_VO, 2796 AC_VO, 2797 }; 2798 2799 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2800 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2801 { 2802 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2803 struct iwl_mvm_tid_data *tid_data; 2804 u16 normalized_ssn; 2805 u16 txq_id; 2806 int ret; 2807 2808 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2809 return -EINVAL; 2810 2811 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2812 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2813 IWL_ERR(mvm, 2814 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2815 mvmsta->tid_data[tid].state); 2816 return -ENXIO; 2817 } 2818 2819 lockdep_assert_held(&mvm->mutex); 2820 2821 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2822 iwl_mvm_has_new_tx_api(mvm)) { 2823 u8 ac = tid_to_mac80211_ac[tid]; 2824 2825 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2826 if (ret) 2827 return ret; 2828 } 2829 2830 spin_lock_bh(&mvmsta->lock); 2831 2832 /* 2833 * Note the possible cases: 2834 * 1. An enabled TXQ - TXQ needs to become agg'ed 2835 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2836 * it as reserved 2837 */ 2838 txq_id = mvmsta->tid_data[tid].txq_id; 2839 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2840 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2841 IWL_MVM_DQA_MIN_DATA_QUEUE, 2842 IWL_MVM_DQA_MAX_DATA_QUEUE); 2843 if (ret < 0) { 2844 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2845 goto out; 2846 } 2847 2848 txq_id = ret; 2849 2850 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2851 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2852 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2853 ret = -ENXIO; 2854 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2855 tid, IWL_MAX_HW_QUEUES - 1); 2856 goto out; 2857 2858 } else if (unlikely(mvm->queue_info[txq_id].status == 2859 IWL_MVM_QUEUE_SHARED)) { 2860 ret = -ENXIO; 2861 IWL_DEBUG_TX_QUEUES(mvm, 2862 "Can't start tid %d agg on shared queue!\n", 2863 tid); 2864 goto out; 2865 } 2866 2867 IWL_DEBUG_TX_QUEUES(mvm, 2868 "AGG for tid %d will be on queue #%d\n", 2869 tid, txq_id); 2870 2871 tid_data = &mvmsta->tid_data[tid]; 2872 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2873 tid_data->txq_id = txq_id; 2874 *ssn = tid_data->ssn; 2875 2876 IWL_DEBUG_TX_QUEUES(mvm, 2877 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2878 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2879 tid_data->next_reclaimed); 2880 2881 /* 2882 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2883 * to align the wrap around of ssn so we compare relevant values. 2884 */ 2885 normalized_ssn = tid_data->ssn; 2886 if (mvm->trans->trans_cfg->gen2) 2887 normalized_ssn &= 0xff; 2888 2889 if (normalized_ssn == tid_data->next_reclaimed) { 2890 tid_data->state = IWL_AGG_STARTING; 2891 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2892 } else { 2893 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2894 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA; 2895 } 2896 2897 out: 2898 spin_unlock_bh(&mvmsta->lock); 2899 2900 return ret; 2901 } 2902 2903 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2904 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2905 bool amsdu) 2906 { 2907 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2908 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2909 unsigned int wdg_timeout = 2910 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2911 int queue, ret; 2912 bool alloc_queue = true; 2913 enum iwl_mvm_queue_status queue_status; 2914 u16 ssn; 2915 2916 struct iwl_trans_txq_scd_cfg cfg = { 2917 .sta_id = mvmsta->sta_id, 2918 .tid = tid, 2919 .frame_limit = buf_size, 2920 .aggregate = true, 2921 }; 2922 2923 /* 2924 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2925 * manager, so this function should never be called in this case. 2926 */ 2927 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2928 return -EINVAL; 2929 2930 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2931 != IWL_MAX_TID_COUNT); 2932 2933 spin_lock_bh(&mvmsta->lock); 2934 ssn = tid_data->ssn; 2935 queue = tid_data->txq_id; 2936 tid_data->state = IWL_AGG_ON; 2937 mvmsta->agg_tids |= BIT(tid); 2938 tid_data->ssn = 0xffff; 2939 tid_data->amsdu_in_ampdu_allowed = amsdu; 2940 spin_unlock_bh(&mvmsta->lock); 2941 2942 if (iwl_mvm_has_new_tx_api(mvm)) { 2943 /* 2944 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2945 * would have failed, so if we are here there is no need to 2946 * allocate a queue. 2947 * However, if aggregation size is different than the default 2948 * size, the scheduler should be reconfigured. 2949 * We cannot do this with the new TX API, so return unsupported 2950 * for now, until it will be offloaded to firmware.. 2951 * Note that if SCD default value changes - this condition 2952 * should be updated as well. 2953 */ 2954 if (buf_size < IWL_FRAME_LIMIT) 2955 return -ENOTSUPP; 2956 2957 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2958 if (ret) 2959 return -EIO; 2960 goto out; 2961 } 2962 2963 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2964 2965 queue_status = mvm->queue_info[queue].status; 2966 2967 /* Maybe there is no need to even alloc a queue... */ 2968 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2969 alloc_queue = false; 2970 2971 /* 2972 * Only reconfig the SCD for the queue if the window size has 2973 * changed from current (become smaller) 2974 */ 2975 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2976 /* 2977 * If reconfiguring an existing queue, it first must be 2978 * drained 2979 */ 2980 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2981 BIT(queue)); 2982 if (ret) { 2983 IWL_ERR(mvm, 2984 "Error draining queue before reconfig\n"); 2985 return ret; 2986 } 2987 2988 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2989 mvmsta->sta_id, tid, 2990 buf_size, ssn); 2991 if (ret) { 2992 IWL_ERR(mvm, 2993 "Error reconfiguring TXQ #%d\n", queue); 2994 return ret; 2995 } 2996 } 2997 2998 if (alloc_queue) 2999 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 3000 &cfg, wdg_timeout); 3001 3002 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 3003 if (queue_status != IWL_MVM_QUEUE_SHARED) { 3004 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3005 if (ret) 3006 return -EIO; 3007 } 3008 3009 /* No need to mark as reserved */ 3010 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 3011 3012 out: 3013 /* 3014 * Even though in theory the peer could have different 3015 * aggregation reorder buffer sizes for different sessions, 3016 * our ucode doesn't allow for that and has a global limit 3017 * for each station. Therefore, use the minimum of all the 3018 * aggregation sessions and our default value. 3019 */ 3020 mvmsta->max_agg_bufsize = 3021 min(mvmsta->max_agg_bufsize, buf_size); 3022 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 3023 3024 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 3025 sta->addr, tid); 3026 3027 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 3028 } 3029 3030 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3031 struct iwl_mvm_sta *mvmsta, 3032 struct iwl_mvm_tid_data *tid_data) 3033 { 3034 u16 txq_id = tid_data->txq_id; 3035 3036 lockdep_assert_held(&mvm->mutex); 3037 3038 if (iwl_mvm_has_new_tx_api(mvm)) 3039 return; 3040 3041 /* 3042 * The TXQ is marked as reserved only if no traffic came through yet 3043 * This means no traffic has been sent on this TID (agg'd or not), so 3044 * we no longer have use for the queue. Since it hasn't even been 3045 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3046 * free. 3047 */ 3048 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3049 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3050 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3051 } 3052 } 3053 3054 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3055 struct ieee80211_sta *sta, u16 tid) 3056 { 3057 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3058 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3059 u16 txq_id; 3060 int err; 3061 3062 /* 3063 * If mac80211 is cleaning its state, then say that we finished since 3064 * our state has been cleared anyway. 3065 */ 3066 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3067 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3068 return 0; 3069 } 3070 3071 spin_lock_bh(&mvmsta->lock); 3072 3073 txq_id = tid_data->txq_id; 3074 3075 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3076 mvmsta->sta_id, tid, txq_id, tid_data->state); 3077 3078 mvmsta->agg_tids &= ~BIT(tid); 3079 3080 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3081 3082 switch (tid_data->state) { 3083 case IWL_AGG_ON: 3084 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3085 3086 IWL_DEBUG_TX_QUEUES(mvm, 3087 "ssn = %d, next_recl = %d\n", 3088 tid_data->ssn, tid_data->next_reclaimed); 3089 3090 tid_data->ssn = 0xffff; 3091 tid_data->state = IWL_AGG_OFF; 3092 spin_unlock_bh(&mvmsta->lock); 3093 3094 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3095 3096 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3097 return 0; 3098 case IWL_AGG_STARTING: 3099 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3100 /* 3101 * The agg session has been stopped before it was set up. This 3102 * can happen when the AddBA timer times out for example. 3103 */ 3104 3105 /* No barriers since we are under mutex */ 3106 lockdep_assert_held(&mvm->mutex); 3107 3108 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3109 tid_data->state = IWL_AGG_OFF; 3110 err = 0; 3111 break; 3112 default: 3113 IWL_ERR(mvm, 3114 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3115 mvmsta->sta_id, tid, tid_data->state); 3116 IWL_ERR(mvm, 3117 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3118 err = -EINVAL; 3119 } 3120 3121 spin_unlock_bh(&mvmsta->lock); 3122 3123 return err; 3124 } 3125 3126 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3127 struct ieee80211_sta *sta, u16 tid) 3128 { 3129 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3130 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3131 u16 txq_id; 3132 enum iwl_mvm_agg_state old_state; 3133 3134 /* 3135 * First set the agg state to OFF to avoid calling 3136 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3137 */ 3138 spin_lock_bh(&mvmsta->lock); 3139 txq_id = tid_data->txq_id; 3140 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3141 mvmsta->sta_id, tid, txq_id, tid_data->state); 3142 old_state = tid_data->state; 3143 tid_data->state = IWL_AGG_OFF; 3144 mvmsta->agg_tids &= ~BIT(tid); 3145 spin_unlock_bh(&mvmsta->lock); 3146 3147 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3148 3149 if (old_state >= IWL_AGG_ON) { 3150 iwl_mvm_drain_sta(mvm, mvmsta, true); 3151 3152 if (iwl_mvm_has_new_tx_api(mvm)) { 3153 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3154 BIT(tid), 0)) 3155 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3156 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3157 } else { 3158 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3159 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3160 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3161 } 3162 3163 iwl_mvm_drain_sta(mvm, mvmsta, false); 3164 3165 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3166 } 3167 3168 return 0; 3169 } 3170 3171 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3172 { 3173 int i, max = -1, max_offs = -1; 3174 3175 lockdep_assert_held(&mvm->mutex); 3176 3177 /* Pick the unused key offset with the highest 'deleted' 3178 * counter. Every time a key is deleted, all the counters 3179 * are incremented and the one that was just deleted is 3180 * reset to zero. Thus, the highest counter is the one 3181 * that was deleted longest ago. Pick that one. 3182 */ 3183 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3184 if (test_bit(i, mvm->fw_key_table)) 3185 continue; 3186 if (mvm->fw_key_deleted[i] > max) { 3187 max = mvm->fw_key_deleted[i]; 3188 max_offs = i; 3189 } 3190 } 3191 3192 if (max_offs < 0) 3193 return STA_KEY_IDX_INVALID; 3194 3195 return max_offs; 3196 } 3197 3198 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3199 struct ieee80211_vif *vif, 3200 struct ieee80211_sta *sta) 3201 { 3202 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3203 3204 if (sta) 3205 return iwl_mvm_sta_from_mac80211(sta); 3206 3207 /* 3208 * The device expects GTKs for station interfaces to be 3209 * installed as GTKs for the AP station. If we have no 3210 * station ID, then use AP's station ID. 3211 */ 3212 if (vif->type == NL80211_IFTYPE_STATION && 3213 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3214 u8 sta_id = mvmvif->ap_sta_id; 3215 3216 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3217 lockdep_is_held(&mvm->mutex)); 3218 3219 /* 3220 * It is possible that the 'sta' parameter is NULL, 3221 * for example when a GTK is removed - the sta_id will then 3222 * be the AP ID, and no station was passed by mac80211. 3223 */ 3224 if (IS_ERR_OR_NULL(sta)) 3225 return NULL; 3226 3227 return iwl_mvm_sta_from_mac80211(sta); 3228 } 3229 3230 return NULL; 3231 } 3232 3233 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3234 u32 sta_id, 3235 struct ieee80211_key_conf *key, bool mcast, 3236 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3237 u8 key_offset, bool mfp) 3238 { 3239 union { 3240 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3241 struct iwl_mvm_add_sta_key_cmd cmd; 3242 } u = {}; 3243 __le16 key_flags; 3244 int ret; 3245 u32 status; 3246 u16 keyidx; 3247 u64 pn = 0; 3248 int i, size; 3249 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3250 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3251 3252 if (sta_id == IWL_MVM_INVALID_STA) 3253 return -EINVAL; 3254 3255 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3256 STA_KEY_FLG_KEYID_MSK; 3257 key_flags = cpu_to_le16(keyidx); 3258 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3259 3260 switch (key->cipher) { 3261 case WLAN_CIPHER_SUITE_TKIP: 3262 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3263 if (new_api) { 3264 memcpy((void *)&u.cmd.tx_mic_key, 3265 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3266 IWL_MIC_KEY_SIZE); 3267 3268 memcpy((void *)&u.cmd.rx_mic_key, 3269 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3270 IWL_MIC_KEY_SIZE); 3271 pn = atomic64_read(&key->tx_pn); 3272 3273 } else { 3274 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3275 for (i = 0; i < 5; i++) 3276 u.cmd_v1.tkip_rx_ttak[i] = 3277 cpu_to_le16(tkip_p1k[i]); 3278 } 3279 memcpy(u.cmd.common.key, key->key, key->keylen); 3280 break; 3281 case WLAN_CIPHER_SUITE_CCMP: 3282 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3283 memcpy(u.cmd.common.key, key->key, key->keylen); 3284 if (new_api) 3285 pn = atomic64_read(&key->tx_pn); 3286 break; 3287 case WLAN_CIPHER_SUITE_WEP104: 3288 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3289 /* fall through */ 3290 case WLAN_CIPHER_SUITE_WEP40: 3291 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3292 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3293 break; 3294 case WLAN_CIPHER_SUITE_GCMP_256: 3295 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3296 /* fall through */ 3297 case WLAN_CIPHER_SUITE_GCMP: 3298 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3299 memcpy(u.cmd.common.key, key->key, key->keylen); 3300 if (new_api) 3301 pn = atomic64_read(&key->tx_pn); 3302 break; 3303 default: 3304 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3305 memcpy(u.cmd.common.key, key->key, key->keylen); 3306 } 3307 3308 if (mcast) 3309 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3310 if (mfp) 3311 key_flags |= cpu_to_le16(STA_KEY_MFP); 3312 3313 u.cmd.common.key_offset = key_offset; 3314 u.cmd.common.key_flags = key_flags; 3315 u.cmd.common.sta_id = sta_id; 3316 3317 if (new_api) { 3318 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3319 size = sizeof(u.cmd); 3320 } else { 3321 size = sizeof(u.cmd_v1); 3322 } 3323 3324 status = ADD_STA_SUCCESS; 3325 if (cmd_flags & CMD_ASYNC) 3326 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3327 &u.cmd); 3328 else 3329 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3330 &u.cmd, &status); 3331 3332 switch (status) { 3333 case ADD_STA_SUCCESS: 3334 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3335 break; 3336 default: 3337 ret = -EIO; 3338 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3339 break; 3340 } 3341 3342 return ret; 3343 } 3344 3345 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3346 struct ieee80211_key_conf *keyconf, 3347 u8 sta_id, bool remove_key) 3348 { 3349 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3350 3351 /* verify the key details match the required command's expectations */ 3352 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3353 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3354 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3355 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3356 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3357 return -EINVAL; 3358 3359 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3360 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3361 return -EINVAL; 3362 3363 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3364 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3365 3366 if (remove_key) { 3367 /* This is a valid situation for IGTK */ 3368 if (sta_id == IWL_MVM_INVALID_STA) 3369 return 0; 3370 3371 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3372 } else { 3373 struct ieee80211_key_seq seq; 3374 const u8 *pn; 3375 3376 switch (keyconf->cipher) { 3377 case WLAN_CIPHER_SUITE_AES_CMAC: 3378 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3379 break; 3380 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3381 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3382 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3383 break; 3384 default: 3385 return -EINVAL; 3386 } 3387 3388 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3389 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3390 igtk_cmd.ctrl_flags |= 3391 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3392 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3393 pn = seq.aes_cmac.pn; 3394 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3395 ((u64) pn[4] << 8) | 3396 ((u64) pn[3] << 16) | 3397 ((u64) pn[2] << 24) | 3398 ((u64) pn[1] << 32) | 3399 ((u64) pn[0] << 40)); 3400 } 3401 3402 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3403 remove_key ? "removing" : "installing", 3404 igtk_cmd.sta_id); 3405 3406 if (!iwl_mvm_has_new_rx_api(mvm)) { 3407 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3408 .ctrl_flags = igtk_cmd.ctrl_flags, 3409 .key_id = igtk_cmd.key_id, 3410 .sta_id = igtk_cmd.sta_id, 3411 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3412 }; 3413 3414 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3415 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3416 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3417 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3418 } 3419 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3420 sizeof(igtk_cmd), &igtk_cmd); 3421 } 3422 3423 3424 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3425 struct ieee80211_vif *vif, 3426 struct ieee80211_sta *sta) 3427 { 3428 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3429 3430 if (sta) 3431 return sta->addr; 3432 3433 if (vif->type == NL80211_IFTYPE_STATION && 3434 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3435 u8 sta_id = mvmvif->ap_sta_id; 3436 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3437 lockdep_is_held(&mvm->mutex)); 3438 return sta->addr; 3439 } 3440 3441 3442 return NULL; 3443 } 3444 3445 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3446 struct ieee80211_vif *vif, 3447 struct ieee80211_sta *sta, 3448 struct ieee80211_key_conf *keyconf, 3449 u8 key_offset, 3450 bool mcast) 3451 { 3452 int ret; 3453 const u8 *addr; 3454 struct ieee80211_key_seq seq; 3455 u16 p1k[5]; 3456 u32 sta_id; 3457 bool mfp = false; 3458 3459 if (sta) { 3460 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3461 3462 sta_id = mvm_sta->sta_id; 3463 mfp = sta->mfp; 3464 } else if (vif->type == NL80211_IFTYPE_AP && 3465 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3466 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3467 3468 sta_id = mvmvif->mcast_sta.sta_id; 3469 } else { 3470 IWL_ERR(mvm, "Failed to find station id\n"); 3471 return -EINVAL; 3472 } 3473 3474 switch (keyconf->cipher) { 3475 case WLAN_CIPHER_SUITE_TKIP: 3476 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3477 /* get phase 1 key from mac80211 */ 3478 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3479 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3480 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3481 seq.tkip.iv32, p1k, 0, key_offset, 3482 mfp); 3483 break; 3484 case WLAN_CIPHER_SUITE_CCMP: 3485 case WLAN_CIPHER_SUITE_WEP40: 3486 case WLAN_CIPHER_SUITE_WEP104: 3487 case WLAN_CIPHER_SUITE_GCMP: 3488 case WLAN_CIPHER_SUITE_GCMP_256: 3489 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3490 0, NULL, 0, key_offset, mfp); 3491 break; 3492 default: 3493 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3494 0, NULL, 0, key_offset, mfp); 3495 } 3496 3497 return ret; 3498 } 3499 3500 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3501 struct ieee80211_vif *vif, 3502 struct ieee80211_sta *sta, 3503 struct ieee80211_key_conf *keyconf, 3504 u8 key_offset) 3505 { 3506 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3507 struct iwl_mvm_sta *mvm_sta; 3508 u8 sta_id = IWL_MVM_INVALID_STA; 3509 int ret; 3510 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3511 3512 lockdep_assert_held(&mvm->mutex); 3513 3514 if (vif->type != NL80211_IFTYPE_AP || 3515 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3516 /* Get the station id from the mvm local station table */ 3517 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3518 if (!mvm_sta) { 3519 IWL_ERR(mvm, "Failed to find station\n"); 3520 return -EINVAL; 3521 } 3522 sta_id = mvm_sta->sta_id; 3523 3524 /* 3525 * It is possible that the 'sta' parameter is NULL, and thus 3526 * there is a need to retrieve the sta from the local station 3527 * table. 3528 */ 3529 if (!sta) { 3530 sta = rcu_dereference_protected( 3531 mvm->fw_id_to_mac_id[sta_id], 3532 lockdep_is_held(&mvm->mutex)); 3533 if (IS_ERR_OR_NULL(sta)) { 3534 IWL_ERR(mvm, "Invalid station id\n"); 3535 return -EINVAL; 3536 } 3537 } 3538 3539 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3540 return -EINVAL; 3541 } else { 3542 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3543 3544 sta_id = mvmvif->mcast_sta.sta_id; 3545 } 3546 3547 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3548 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3549 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3550 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3551 goto end; 3552 } 3553 3554 /* If the key_offset is not pre-assigned, we need to find a 3555 * new offset to use. In normal cases, the offset is not 3556 * pre-assigned, but during HW_RESTART we want to reuse the 3557 * same indices, so we pass them when this function is called. 3558 * 3559 * In D3 entry, we need to hardcoded the indices (because the 3560 * firmware hardcodes the PTK offset to 0). In this case, we 3561 * need to make sure we don't overwrite the hw_key_idx in the 3562 * keyconf structure, because otherwise we cannot configure 3563 * the original ones back when resuming. 3564 */ 3565 if (key_offset == STA_KEY_IDX_INVALID) { 3566 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3567 if (key_offset == STA_KEY_IDX_INVALID) 3568 return -ENOSPC; 3569 keyconf->hw_key_idx = key_offset; 3570 } 3571 3572 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3573 if (ret) 3574 goto end; 3575 3576 /* 3577 * For WEP, the same key is used for multicast and unicast. Upload it 3578 * again, using the same key offset, and now pointing the other one 3579 * to the same key slot (offset). 3580 * If this fails, remove the original as well. 3581 */ 3582 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3583 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3584 sta) { 3585 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3586 key_offset, !mcast); 3587 if (ret) { 3588 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3589 goto end; 3590 } 3591 } 3592 3593 __set_bit(key_offset, mvm->fw_key_table); 3594 3595 end: 3596 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3597 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3598 sta ? sta->addr : zero_addr, ret); 3599 return ret; 3600 } 3601 3602 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3603 struct ieee80211_vif *vif, 3604 struct ieee80211_sta *sta, 3605 struct ieee80211_key_conf *keyconf) 3606 { 3607 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3608 struct iwl_mvm_sta *mvm_sta; 3609 u8 sta_id = IWL_MVM_INVALID_STA; 3610 int ret, i; 3611 3612 lockdep_assert_held(&mvm->mutex); 3613 3614 /* Get the station from the mvm local station table */ 3615 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3616 if (mvm_sta) 3617 sta_id = mvm_sta->sta_id; 3618 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3619 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3620 3621 3622 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3623 keyconf->keyidx, sta_id); 3624 3625 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3626 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3627 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3628 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3629 3630 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3631 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3632 keyconf->hw_key_idx); 3633 return -ENOENT; 3634 } 3635 3636 /* track which key was deleted last */ 3637 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3638 if (mvm->fw_key_deleted[i] < U8_MAX) 3639 mvm->fw_key_deleted[i]++; 3640 } 3641 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3642 3643 if (sta && !mvm_sta) { 3644 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3645 return 0; 3646 } 3647 3648 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3649 if (ret) 3650 return ret; 3651 3652 /* delete WEP key twice to get rid of (now useless) offset */ 3653 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3654 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3655 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3656 3657 return ret; 3658 } 3659 3660 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3661 struct ieee80211_vif *vif, 3662 struct ieee80211_key_conf *keyconf, 3663 struct ieee80211_sta *sta, u32 iv32, 3664 u16 *phase1key) 3665 { 3666 struct iwl_mvm_sta *mvm_sta; 3667 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3668 bool mfp = sta ? sta->mfp : false; 3669 3670 rcu_read_lock(); 3671 3672 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3673 if (WARN_ON_ONCE(!mvm_sta)) 3674 goto unlock; 3675 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3676 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3677 mfp); 3678 3679 unlock: 3680 rcu_read_unlock(); 3681 } 3682 3683 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3684 struct ieee80211_sta *sta) 3685 { 3686 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3687 struct iwl_mvm_add_sta_cmd cmd = { 3688 .add_modify = STA_MODE_MODIFY, 3689 .sta_id = mvmsta->sta_id, 3690 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3691 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3692 }; 3693 int ret; 3694 3695 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3696 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3697 if (ret) 3698 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3699 } 3700 3701 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3702 struct ieee80211_sta *sta, 3703 enum ieee80211_frame_release_type reason, 3704 u16 cnt, u16 tids, bool more_data, 3705 bool single_sta_queue) 3706 { 3707 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3708 struct iwl_mvm_add_sta_cmd cmd = { 3709 .add_modify = STA_MODE_MODIFY, 3710 .sta_id = mvmsta->sta_id, 3711 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3712 .sleep_tx_count = cpu_to_le16(cnt), 3713 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3714 }; 3715 int tid, ret; 3716 unsigned long _tids = tids; 3717 3718 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3719 * Note that this field is reserved and unused by firmware not 3720 * supporting GO uAPSD, so it's safe to always do this. 3721 */ 3722 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3723 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3724 3725 /* If we're releasing frames from aggregation or dqa queues then check 3726 * if all the queues that we're releasing frames from, combined, have: 3727 * - more frames than the service period, in which case more_data 3728 * needs to be set 3729 * - fewer than 'cnt' frames, in which case we need to adjust the 3730 * firmware command (but do that unconditionally) 3731 */ 3732 if (single_sta_queue) { 3733 int remaining = cnt; 3734 int sleep_tx_count; 3735 3736 spin_lock_bh(&mvmsta->lock); 3737 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3738 struct iwl_mvm_tid_data *tid_data; 3739 u16 n_queued; 3740 3741 tid_data = &mvmsta->tid_data[tid]; 3742 3743 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3744 if (n_queued > remaining) { 3745 more_data = true; 3746 remaining = 0; 3747 break; 3748 } 3749 remaining -= n_queued; 3750 } 3751 sleep_tx_count = cnt - remaining; 3752 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3753 mvmsta->sleep_tx_count = sleep_tx_count; 3754 spin_unlock_bh(&mvmsta->lock); 3755 3756 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3757 if (WARN_ON(cnt - remaining == 0)) { 3758 ieee80211_sta_eosp(sta); 3759 return; 3760 } 3761 } 3762 3763 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3764 if (more_data) 3765 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3766 3767 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3768 mvmsta->next_status_eosp = true; 3769 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3770 } else { 3771 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3772 } 3773 3774 /* block the Tx queues until the FW updated the sleep Tx count */ 3775 iwl_trans_block_txq_ptrs(mvm->trans, true); 3776 3777 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3778 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3779 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3780 if (ret) 3781 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3782 } 3783 3784 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3785 struct iwl_rx_cmd_buffer *rxb) 3786 { 3787 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3788 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3789 struct ieee80211_sta *sta; 3790 u32 sta_id = le32_to_cpu(notif->sta_id); 3791 3792 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations)) 3793 return; 3794 3795 rcu_read_lock(); 3796 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3797 if (!IS_ERR_OR_NULL(sta)) 3798 ieee80211_sta_eosp(sta); 3799 rcu_read_unlock(); 3800 } 3801 3802 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3803 struct iwl_mvm_sta *mvmsta, bool disable) 3804 { 3805 struct iwl_mvm_add_sta_cmd cmd = { 3806 .add_modify = STA_MODE_MODIFY, 3807 .sta_id = mvmsta->sta_id, 3808 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3809 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3810 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3811 }; 3812 int ret; 3813 3814 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3815 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3816 if (ret) 3817 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3818 } 3819 3820 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3821 struct ieee80211_sta *sta, 3822 bool disable) 3823 { 3824 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3825 3826 spin_lock_bh(&mvm_sta->lock); 3827 3828 if (mvm_sta->disable_tx == disable) { 3829 spin_unlock_bh(&mvm_sta->lock); 3830 return; 3831 } 3832 3833 mvm_sta->disable_tx = disable; 3834 3835 /* Tell mac80211 to start/stop queuing tx for this station */ 3836 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3837 3838 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3839 3840 spin_unlock_bh(&mvm_sta->lock); 3841 } 3842 3843 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3844 struct iwl_mvm_vif *mvmvif, 3845 struct iwl_mvm_int_sta *sta, 3846 bool disable) 3847 { 3848 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3849 struct iwl_mvm_add_sta_cmd cmd = { 3850 .add_modify = STA_MODE_MODIFY, 3851 .sta_id = sta->sta_id, 3852 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3853 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3854 .mac_id_n_color = cpu_to_le32(id), 3855 }; 3856 int ret; 3857 3858 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3859 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3860 if (ret) 3861 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3862 } 3863 3864 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3865 struct iwl_mvm_vif *mvmvif, 3866 bool disable) 3867 { 3868 struct ieee80211_sta *sta; 3869 struct iwl_mvm_sta *mvm_sta; 3870 int i; 3871 3872 lockdep_assert_held(&mvm->mutex); 3873 3874 /* Block/unblock all the stations of the given mvmvif */ 3875 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { 3876 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3877 lockdep_is_held(&mvm->mutex)); 3878 if (IS_ERR_OR_NULL(sta)) 3879 continue; 3880 3881 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3882 if (mvm_sta->mac_id_n_color != 3883 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3884 continue; 3885 3886 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3887 } 3888 3889 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3890 return; 3891 3892 /* Need to block/unblock also multicast station */ 3893 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3894 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3895 &mvmvif->mcast_sta, disable); 3896 3897 /* 3898 * Only unblock the broadcast station (FW blocks it for immediate 3899 * quiet, not the driver) 3900 */ 3901 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3902 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3903 &mvmvif->bcast_sta, disable); 3904 } 3905 3906 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3907 { 3908 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3909 struct iwl_mvm_sta *mvmsta; 3910 3911 rcu_read_lock(); 3912 3913 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3914 3915 if (!WARN_ON(!mvmsta)) 3916 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3917 3918 rcu_read_unlock(); 3919 } 3920 3921 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3922 { 3923 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3924 3925 /* 3926 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3927 * to align the wrap around of ssn so we compare relevant values. 3928 */ 3929 if (mvm->trans->trans_cfg->gen2) 3930 sn &= 0xff; 3931 3932 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3933 } 3934 3935 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3936 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher, 3937 u8 *key, u32 key_len) 3938 { 3939 int ret; 3940 u16 queue; 3941 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3942 struct ieee80211_key_conf *keyconf; 3943 3944 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0, 3945 NL80211_IFTYPE_UNSPECIFIED, 3946 IWL_STA_LINK); 3947 if (ret) 3948 return ret; 3949 3950 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 3951 addr, sta, &queue, 3952 IWL_MVM_TX_FIFO_BE); 3953 if (ret) 3954 goto out; 3955 3956 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL); 3957 if (!keyconf) { 3958 ret = -ENOBUFS; 3959 goto out; 3960 } 3961 3962 keyconf->cipher = cipher; 3963 memcpy(keyconf->key, key, key_len); 3964 keyconf->keylen = key_len; 3965 3966 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false, 3967 0, NULL, 0, 0, true); 3968 kfree(keyconf); 3969 return 0; 3970 out: 3971 iwl_mvm_dealloc_int_sta(mvm, sta); 3972 return ret; 3973 } 3974