1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2015, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <net/mac80211.h> 8 9 #include "mvm.h" 10 #include "sta.h" 11 #include "rs.h" 12 13 /* 14 * New version of ADD_STA_sta command added new fields at the end of the 15 * structure, so sending the size of the relevant API's structure is enough to 16 * support both API versions. 17 */ 18 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 19 { 20 if (iwl_mvm_has_new_rx_api(mvm) || 21 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 22 return sizeof(struct iwl_mvm_add_sta_cmd); 23 else 24 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 25 } 26 27 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 28 enum nl80211_iftype iftype) 29 { 30 int sta_id; 31 u32 reserved_ids = 0; 32 33 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32); 34 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 35 36 lockdep_assert_held(&mvm->mutex); 37 38 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 39 if (iftype != NL80211_IFTYPE_STATION) 40 reserved_ids = BIT(0); 41 42 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 43 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) { 44 if (BIT(sta_id) & reserved_ids) 45 continue; 46 47 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 48 lockdep_is_held(&mvm->mutex))) 49 return sta_id; 50 } 51 return IWL_MVM_INVALID_STA; 52 } 53 54 /* send station add/update command to firmware */ 55 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 56 bool update, unsigned int flags) 57 { 58 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 59 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 60 .sta_id = mvm_sta->sta_id, 61 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 62 .add_modify = update ? 1 : 0, 63 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 64 STA_FLG_MIMO_EN_MSK | 65 STA_FLG_RTS_MIMO_PROT), 66 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 67 }; 68 int ret; 69 u32 status; 70 u32 agg_size = 0, mpdu_dens = 0; 71 72 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 73 add_sta_cmd.station_type = mvm_sta->sta_type; 74 75 if (!update || (flags & STA_MODIFY_QUEUES)) { 76 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 77 78 if (!iwl_mvm_has_new_tx_api(mvm)) { 79 add_sta_cmd.tfd_queue_msk = 80 cpu_to_le32(mvm_sta->tfd_queue_msk); 81 82 if (flags & STA_MODIFY_QUEUES) 83 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 84 } else { 85 WARN_ON(flags & STA_MODIFY_QUEUES); 86 } 87 } 88 89 switch (sta->bandwidth) { 90 case IEEE80211_STA_RX_BW_160: 91 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 92 fallthrough; 93 case IEEE80211_STA_RX_BW_80: 94 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 95 fallthrough; 96 case IEEE80211_STA_RX_BW_40: 97 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 98 fallthrough; 99 case IEEE80211_STA_RX_BW_20: 100 if (sta->ht_cap.ht_supported) 101 add_sta_cmd.station_flags |= 102 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 103 break; 104 } 105 106 switch (sta->rx_nss) { 107 case 1: 108 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 109 break; 110 case 2: 111 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 112 break; 113 case 3 ... 8: 114 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 115 break; 116 } 117 118 switch (sta->smps_mode) { 119 case IEEE80211_SMPS_AUTOMATIC: 120 case IEEE80211_SMPS_NUM_MODES: 121 WARN_ON(1); 122 break; 123 case IEEE80211_SMPS_STATIC: 124 /* override NSS */ 125 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 126 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 127 break; 128 case IEEE80211_SMPS_DYNAMIC: 129 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 130 break; 131 case IEEE80211_SMPS_OFF: 132 /* nothing */ 133 break; 134 } 135 136 if (sta->ht_cap.ht_supported) { 137 add_sta_cmd.station_flags_msk |= 138 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 139 STA_FLG_AGG_MPDU_DENS_MSK); 140 141 mpdu_dens = sta->ht_cap.ampdu_density; 142 } 143 144 if (mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) { 145 add_sta_cmd.station_flags_msk |= 146 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 147 STA_FLG_AGG_MPDU_DENS_MSK); 148 149 mpdu_dens = le16_get_bits(sta->he_6ghz_capa.capa, 150 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START); 151 agg_size = le16_get_bits(sta->he_6ghz_capa.capa, 152 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP); 153 } else 154 if (sta->vht_cap.vht_supported) { 155 agg_size = sta->vht_cap.cap & 156 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 157 agg_size >>= 158 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 159 } else if (sta->ht_cap.ht_supported) { 160 agg_size = sta->ht_cap.ampdu_factor; 161 } 162 163 /* D6.0 10.12.2 A-MPDU length limit rules 164 * A STA indicates the maximum length of the A-MPDU preEOF padding 165 * that it can receive in an HE PPDU in the Maximum A-MPDU Length 166 * Exponent field in its HT Capabilities, VHT Capabilities, 167 * and HE 6 GHz Band Capabilities elements (if present) and the 168 * Maximum AMPDU Length Exponent Extension field in its HE 169 * Capabilities element 170 */ 171 if (sta->he_cap.has_he) 172 agg_size += u8_get_bits(sta->he_cap.he_cap_elem.mac_cap_info[3], 173 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK); 174 175 /* Limit to max A-MPDU supported by FW */ 176 if (agg_size > (STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT)) 177 agg_size = (STA_FLG_MAX_AGG_SIZE_4M >> 178 STA_FLG_MAX_AGG_SIZE_SHIFT); 179 180 add_sta_cmd.station_flags |= 181 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 182 add_sta_cmd.station_flags |= 183 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 184 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 185 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 186 187 if (sta->wme) { 188 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 189 190 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 191 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 192 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 193 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 194 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 195 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 196 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 197 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 198 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 199 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 200 } 201 202 status = ADD_STA_SUCCESS; 203 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 204 iwl_mvm_add_sta_cmd_size(mvm), 205 &add_sta_cmd, &status); 206 if (ret) 207 return ret; 208 209 switch (status & IWL_ADD_STA_STATUS_MASK) { 210 case ADD_STA_SUCCESS: 211 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 212 break; 213 default: 214 ret = -EIO; 215 IWL_ERR(mvm, "ADD_STA failed\n"); 216 break; 217 } 218 219 return ret; 220 } 221 222 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 223 { 224 struct iwl_mvm_baid_data *data = 225 from_timer(data, t, session_timer); 226 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 227 struct iwl_mvm_baid_data *ba_data; 228 struct ieee80211_sta *sta; 229 struct iwl_mvm_sta *mvm_sta; 230 unsigned long timeout; 231 232 rcu_read_lock(); 233 234 ba_data = rcu_dereference(*rcu_ptr); 235 236 if (WARN_ON(!ba_data)) 237 goto unlock; 238 239 if (!ba_data->timeout) 240 goto unlock; 241 242 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 243 if (time_is_after_jiffies(timeout)) { 244 mod_timer(&ba_data->session_timer, timeout); 245 goto unlock; 246 } 247 248 /* Timer expired */ 249 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 250 251 /* 252 * sta should be valid unless the following happens: 253 * The firmware asserts which triggers a reconfig flow, but 254 * the reconfig fails before we set the pointer to sta into 255 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 256 * A-MDPU and hence the timer continues to run. Then, the 257 * timer expires and sta is NULL. 258 */ 259 if (!sta) 260 goto unlock; 261 262 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 263 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 264 sta->addr, ba_data->tid); 265 unlock: 266 rcu_read_unlock(); 267 } 268 269 /* Disable aggregations for a bitmap of TIDs for a given station */ 270 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 271 unsigned long disable_agg_tids, 272 bool remove_queue) 273 { 274 struct iwl_mvm_add_sta_cmd cmd = {}; 275 struct ieee80211_sta *sta; 276 struct iwl_mvm_sta *mvmsta; 277 u32 status; 278 u8 sta_id; 279 280 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 281 return -EINVAL; 282 283 sta_id = mvm->queue_info[queue].ra_sta_id; 284 285 rcu_read_lock(); 286 287 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 288 289 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 290 rcu_read_unlock(); 291 return -EINVAL; 292 } 293 294 mvmsta = iwl_mvm_sta_from_mac80211(sta); 295 296 mvmsta->tid_disable_agg |= disable_agg_tids; 297 298 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 299 cmd.sta_id = mvmsta->sta_id; 300 cmd.add_modify = STA_MODE_MODIFY; 301 cmd.modify_mask = STA_MODIFY_QUEUES; 302 if (disable_agg_tids) 303 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 304 if (remove_queue) 305 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 306 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 307 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 308 309 rcu_read_unlock(); 310 311 /* Notify FW of queue removal from the STA queues */ 312 status = ADD_STA_SUCCESS; 313 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 314 iwl_mvm_add_sta_cmd_size(mvm), 315 &cmd, &status); 316 } 317 318 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 319 int queue, u8 tid, u8 flags) 320 { 321 struct iwl_scd_txq_cfg_cmd cmd = { 322 .scd_queue = queue, 323 .action = SCD_CFG_DISABLE_QUEUE, 324 }; 325 int ret; 326 327 if (iwl_mvm_has_new_tx_api(mvm)) { 328 iwl_trans_txq_free(mvm->trans, queue); 329 330 return 0; 331 } 332 333 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 334 return 0; 335 336 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 337 338 cmd.action = mvm->queue_info[queue].tid_bitmap ? 339 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 340 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 341 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 342 343 IWL_DEBUG_TX_QUEUES(mvm, 344 "Disabling TXQ #%d tids=0x%x\n", 345 queue, 346 mvm->queue_info[queue].tid_bitmap); 347 348 /* If the queue is still enabled - nothing left to do in this func */ 349 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 350 return 0; 351 352 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 353 cmd.tid = mvm->queue_info[queue].txq_tid; 354 355 /* Make sure queue info is correct even though we overwrite it */ 356 WARN(mvm->queue_info[queue].tid_bitmap, 357 "TXQ #%d info out-of-sync - tids=0x%x\n", 358 queue, mvm->queue_info[queue].tid_bitmap); 359 360 /* If we are here - the queue is freed and we can zero out these vals */ 361 mvm->queue_info[queue].tid_bitmap = 0; 362 363 if (sta) { 364 struct iwl_mvm_txq *mvmtxq = 365 iwl_mvm_txq_from_tid(sta, tid); 366 367 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 368 } 369 370 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 371 mvm->queue_info[queue].reserved = false; 372 373 iwl_trans_txq_disable(mvm->trans, queue, false); 374 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 375 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 376 377 if (ret) 378 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 379 queue, ret); 380 return ret; 381 } 382 383 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 384 { 385 struct ieee80211_sta *sta; 386 struct iwl_mvm_sta *mvmsta; 387 unsigned long tid_bitmap; 388 unsigned long agg_tids = 0; 389 u8 sta_id; 390 int tid; 391 392 lockdep_assert_held(&mvm->mutex); 393 394 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 395 return -EINVAL; 396 397 sta_id = mvm->queue_info[queue].ra_sta_id; 398 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 399 400 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 401 lockdep_is_held(&mvm->mutex)); 402 403 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 404 return -EINVAL; 405 406 mvmsta = iwl_mvm_sta_from_mac80211(sta); 407 408 spin_lock_bh(&mvmsta->lock); 409 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 410 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 411 agg_tids |= BIT(tid); 412 } 413 spin_unlock_bh(&mvmsta->lock); 414 415 return agg_tids; 416 } 417 418 /* 419 * Remove a queue from a station's resources. 420 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 421 * doesn't disable the queue 422 */ 423 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 424 { 425 struct ieee80211_sta *sta; 426 struct iwl_mvm_sta *mvmsta; 427 unsigned long tid_bitmap; 428 unsigned long disable_agg_tids = 0; 429 u8 sta_id; 430 int tid; 431 432 lockdep_assert_held(&mvm->mutex); 433 434 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 435 return -EINVAL; 436 437 sta_id = mvm->queue_info[queue].ra_sta_id; 438 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 439 440 rcu_read_lock(); 441 442 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 443 444 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 445 rcu_read_unlock(); 446 return 0; 447 } 448 449 mvmsta = iwl_mvm_sta_from_mac80211(sta); 450 451 spin_lock_bh(&mvmsta->lock); 452 /* Unmap MAC queues and TIDs from this queue */ 453 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 454 struct iwl_mvm_txq *mvmtxq = 455 iwl_mvm_txq_from_tid(sta, tid); 456 457 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 458 disable_agg_tids |= BIT(tid); 459 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 460 461 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 462 } 463 464 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 465 spin_unlock_bh(&mvmsta->lock); 466 467 rcu_read_unlock(); 468 469 /* 470 * The TX path may have been using this TXQ_ID from the tid_data, 471 * so make sure it's no longer running so that we can safely reuse 472 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 473 * above, but nothing guarantees we've stopped using them. Thus, 474 * without this, we could get to iwl_mvm_disable_txq() and remove 475 * the queue while still sending frames to it. 476 */ 477 synchronize_net(); 478 479 return disable_agg_tids; 480 } 481 482 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 483 struct ieee80211_sta *old_sta, 484 u8 new_sta_id) 485 { 486 struct iwl_mvm_sta *mvmsta; 487 u8 sta_id, tid; 488 unsigned long disable_agg_tids = 0; 489 bool same_sta; 490 int ret; 491 492 lockdep_assert_held(&mvm->mutex); 493 494 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 495 return -EINVAL; 496 497 sta_id = mvm->queue_info[queue].ra_sta_id; 498 tid = mvm->queue_info[queue].txq_tid; 499 500 same_sta = sta_id == new_sta_id; 501 502 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 503 if (WARN_ON(!mvmsta)) 504 return -EINVAL; 505 506 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 507 /* Disable the queue */ 508 if (disable_agg_tids) 509 iwl_mvm_invalidate_sta_queue(mvm, queue, 510 disable_agg_tids, false); 511 512 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 513 if (ret) { 514 IWL_ERR(mvm, 515 "Failed to free inactive queue %d (ret=%d)\n", 516 queue, ret); 517 518 return ret; 519 } 520 521 /* If TXQ is allocated to another STA, update removal in FW */ 522 if (!same_sta) 523 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 524 525 return 0; 526 } 527 528 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 529 unsigned long tfd_queue_mask, u8 ac) 530 { 531 int queue = 0; 532 u8 ac_to_queue[IEEE80211_NUM_ACS]; 533 int i; 534 535 /* 536 * This protects us against grabbing a queue that's being reconfigured 537 * by the inactivity checker. 538 */ 539 lockdep_assert_held(&mvm->mutex); 540 541 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 542 return -EINVAL; 543 544 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 545 546 /* See what ACs the existing queues for this STA have */ 547 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 548 /* Only DATA queues can be shared */ 549 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 550 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 551 continue; 552 553 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 554 } 555 556 /* 557 * The queue to share is chosen only from DATA queues as follows (in 558 * descending priority): 559 * 1. An AC_BE queue 560 * 2. Same AC queue 561 * 3. Highest AC queue that is lower than new AC 562 * 4. Any existing AC (there always is at least 1 DATA queue) 563 */ 564 565 /* Priority 1: An AC_BE queue */ 566 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 567 queue = ac_to_queue[IEEE80211_AC_BE]; 568 /* Priority 2: Same AC queue */ 569 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 570 queue = ac_to_queue[ac]; 571 /* Priority 3a: If new AC is VO and VI exists - use VI */ 572 else if (ac == IEEE80211_AC_VO && 573 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 574 queue = ac_to_queue[IEEE80211_AC_VI]; 575 /* Priority 3b: No BE so only AC less than the new one is BK */ 576 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 577 queue = ac_to_queue[IEEE80211_AC_BK]; 578 /* Priority 4a: No BE nor BK - use VI if exists */ 579 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 580 queue = ac_to_queue[IEEE80211_AC_VI]; 581 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 582 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 583 queue = ac_to_queue[IEEE80211_AC_VO]; 584 585 /* Make sure queue found (or not) is legal */ 586 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 587 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 588 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 589 IWL_ERR(mvm, "No DATA queues available to share\n"); 590 return -ENOSPC; 591 } 592 593 return queue; 594 } 595 596 /* 597 * If a given queue has a higher AC than the TID stream that is being compared 598 * to, the queue needs to be redirected to the lower AC. This function does that 599 * in such a case, otherwise - if no redirection required - it does nothing, 600 * unless the %force param is true. 601 */ 602 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 603 int ac, int ssn, unsigned int wdg_timeout, 604 bool force, struct iwl_mvm_txq *txq) 605 { 606 struct iwl_scd_txq_cfg_cmd cmd = { 607 .scd_queue = queue, 608 .action = SCD_CFG_DISABLE_QUEUE, 609 }; 610 bool shared_queue; 611 int ret; 612 613 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 614 return -EINVAL; 615 616 /* 617 * If the AC is lower than current one - FIFO needs to be redirected to 618 * the lowest one of the streams in the queue. Check if this is needed 619 * here. 620 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 621 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 622 * we need to check if the numerical value of X is LARGER than of Y. 623 */ 624 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 625 IWL_DEBUG_TX_QUEUES(mvm, 626 "No redirection needed on TXQ #%d\n", 627 queue); 628 return 0; 629 } 630 631 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 632 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 633 cmd.tid = mvm->queue_info[queue].txq_tid; 634 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 635 636 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 637 queue, iwl_mvm_ac_to_tx_fifo[ac]); 638 639 /* Stop the queue and wait for it to empty */ 640 txq->stopped = true; 641 642 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 643 if (ret) { 644 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 645 queue); 646 ret = -EIO; 647 goto out; 648 } 649 650 /* Before redirecting the queue we need to de-activate it */ 651 iwl_trans_txq_disable(mvm->trans, queue, false); 652 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 653 if (ret) 654 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 655 ret); 656 657 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 658 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 659 660 /* Update the TID "owner" of the queue */ 661 mvm->queue_info[queue].txq_tid = tid; 662 663 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 664 665 /* Redirect to lower AC */ 666 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 667 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 668 669 /* Update AC marking of the queue */ 670 mvm->queue_info[queue].mac80211_ac = ac; 671 672 /* 673 * Mark queue as shared in transport if shared 674 * Note this has to be done after queue enablement because enablement 675 * can also set this value, and there is no indication there to shared 676 * queues 677 */ 678 if (shared_queue) 679 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 680 681 out: 682 /* Continue using the queue */ 683 txq->stopped = false; 684 685 return ret; 686 } 687 688 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 689 u8 minq, u8 maxq) 690 { 691 int i; 692 693 lockdep_assert_held(&mvm->mutex); 694 695 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues, 696 "max queue %d >= num_of_queues (%d)", maxq, 697 mvm->trans->trans_cfg->base_params->num_of_queues)) 698 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1; 699 700 /* This should not be hit with new TX path */ 701 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 702 return -ENOSPC; 703 704 /* Start by looking for a free queue */ 705 for (i = minq; i <= maxq; i++) 706 if (mvm->queue_info[i].tid_bitmap == 0 && 707 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 708 return i; 709 710 return -ENOSPC; 711 } 712 713 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 714 u8 sta_id, u8 tid, unsigned int timeout) 715 { 716 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE, 717 mvm->trans->cfg->min_256_ba_txq_size); 718 719 if (tid == IWL_MAX_TID_COUNT) { 720 tid = IWL_MGMT_TID; 721 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 722 mvm->trans->cfg->min_txq_size); 723 } 724 725 do { 726 __le16 enable = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE); 727 728 queue = iwl_trans_txq_alloc(mvm->trans, enable, 729 sta_id, tid, SCD_QUEUE_CFG, 730 size, timeout); 731 732 if (queue < 0) 733 IWL_DEBUG_TX_QUEUES(mvm, 734 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n", 735 size, sta_id, tid, queue); 736 size /= 2; 737 } while (queue < 0 && size >= 16); 738 739 if (queue < 0) 740 return queue; 741 742 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 743 queue, sta_id, tid); 744 745 return queue; 746 } 747 748 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 749 struct ieee80211_sta *sta, u8 ac, 750 int tid) 751 { 752 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 753 struct iwl_mvm_txq *mvmtxq = 754 iwl_mvm_txq_from_tid(sta, tid); 755 unsigned int wdg_timeout = 756 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 757 int queue = -1; 758 759 lockdep_assert_held(&mvm->mutex); 760 761 IWL_DEBUG_TX_QUEUES(mvm, 762 "Allocating queue for sta %d on tid %d\n", 763 mvmsta->sta_id, tid); 764 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 765 if (queue < 0) 766 return queue; 767 768 mvmtxq->txq_id = queue; 769 mvm->tvqm_info[queue].txq_tid = tid; 770 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 771 772 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 773 774 spin_lock_bh(&mvmsta->lock); 775 mvmsta->tid_data[tid].txq_id = queue; 776 spin_unlock_bh(&mvmsta->lock); 777 778 return 0; 779 } 780 781 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 782 struct ieee80211_sta *sta, 783 int queue, u8 sta_id, u8 tid) 784 { 785 bool enable_queue = true; 786 787 /* Make sure this TID isn't already enabled */ 788 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 789 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 790 queue, tid); 791 return false; 792 } 793 794 /* Update mappings and refcounts */ 795 if (mvm->queue_info[queue].tid_bitmap) 796 enable_queue = false; 797 798 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 799 mvm->queue_info[queue].ra_sta_id = sta_id; 800 801 if (enable_queue) { 802 if (tid != IWL_MAX_TID_COUNT) 803 mvm->queue_info[queue].mac80211_ac = 804 tid_to_mac80211_ac[tid]; 805 else 806 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 807 808 mvm->queue_info[queue].txq_tid = tid; 809 } 810 811 if (sta) { 812 struct iwl_mvm_txq *mvmtxq = 813 iwl_mvm_txq_from_tid(sta, tid); 814 815 mvmtxq->txq_id = queue; 816 } 817 818 IWL_DEBUG_TX_QUEUES(mvm, 819 "Enabling TXQ #%d tids=0x%x\n", 820 queue, mvm->queue_info[queue].tid_bitmap); 821 822 return enable_queue; 823 } 824 825 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 826 int queue, u16 ssn, 827 const struct iwl_trans_txq_scd_cfg *cfg, 828 unsigned int wdg_timeout) 829 { 830 struct iwl_scd_txq_cfg_cmd cmd = { 831 .scd_queue = queue, 832 .action = SCD_CFG_ENABLE_QUEUE, 833 .window = cfg->frame_limit, 834 .sta_id = cfg->sta_id, 835 .ssn = cpu_to_le16(ssn), 836 .tx_fifo = cfg->fifo, 837 .aggregate = cfg->aggregate, 838 .tid = cfg->tid, 839 }; 840 bool inc_ssn; 841 842 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 843 return false; 844 845 /* Send the enabling command if we need to */ 846 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 847 return false; 848 849 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 850 NULL, wdg_timeout); 851 if (inc_ssn) 852 le16_add_cpu(&cmd.ssn, 1); 853 854 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 855 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 856 857 return inc_ssn; 858 } 859 860 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 861 { 862 struct iwl_scd_txq_cfg_cmd cmd = { 863 .scd_queue = queue, 864 .action = SCD_CFG_UPDATE_QUEUE_TID, 865 }; 866 int tid; 867 unsigned long tid_bitmap; 868 int ret; 869 870 lockdep_assert_held(&mvm->mutex); 871 872 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 873 return; 874 875 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 876 877 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 878 return; 879 880 /* Find any TID for queue */ 881 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 882 cmd.tid = tid; 883 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 884 885 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 886 if (ret) { 887 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 888 queue, ret); 889 return; 890 } 891 892 mvm->queue_info[queue].txq_tid = tid; 893 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 894 queue, tid); 895 } 896 897 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 898 { 899 struct ieee80211_sta *sta; 900 struct iwl_mvm_sta *mvmsta; 901 u8 sta_id; 902 int tid = -1; 903 unsigned long tid_bitmap; 904 unsigned int wdg_timeout; 905 int ssn; 906 int ret = true; 907 908 /* queue sharing is disabled on new TX path */ 909 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 910 return; 911 912 lockdep_assert_held(&mvm->mutex); 913 914 sta_id = mvm->queue_info[queue].ra_sta_id; 915 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 916 917 /* Find TID for queue, and make sure it is the only one on the queue */ 918 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 919 if (tid_bitmap != BIT(tid)) { 920 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 921 queue, tid_bitmap); 922 return; 923 } 924 925 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 926 tid); 927 928 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 929 lockdep_is_held(&mvm->mutex)); 930 931 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 932 return; 933 934 mvmsta = iwl_mvm_sta_from_mac80211(sta); 935 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 936 937 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 938 939 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 940 tid_to_mac80211_ac[tid], ssn, 941 wdg_timeout, true, 942 iwl_mvm_txq_from_tid(sta, tid)); 943 if (ret) { 944 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 945 return; 946 } 947 948 /* If aggs should be turned back on - do it */ 949 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 950 struct iwl_mvm_add_sta_cmd cmd = {0}; 951 952 mvmsta->tid_disable_agg &= ~BIT(tid); 953 954 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 955 cmd.sta_id = mvmsta->sta_id; 956 cmd.add_modify = STA_MODE_MODIFY; 957 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 958 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 959 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 960 961 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 962 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 963 if (!ret) { 964 IWL_DEBUG_TX_QUEUES(mvm, 965 "TXQ #%d is now aggregated again\n", 966 queue); 967 968 /* Mark queue intenally as aggregating again */ 969 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 970 } 971 } 972 973 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 974 } 975 976 /* 977 * Remove inactive TIDs of a given queue. 978 * If all queue TIDs are inactive - mark the queue as inactive 979 * If only some the queue TIDs are inactive - unmap them from the queue 980 * 981 * Returns %true if all TIDs were removed and the queue could be reused. 982 */ 983 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 984 struct iwl_mvm_sta *mvmsta, int queue, 985 unsigned long tid_bitmap, 986 unsigned long *unshare_queues, 987 unsigned long *changetid_queues) 988 { 989 int tid; 990 991 lockdep_assert_held(&mvmsta->lock); 992 lockdep_assert_held(&mvm->mutex); 993 994 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 995 return false; 996 997 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 998 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 999 /* If some TFDs are still queued - don't mark TID as inactive */ 1000 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1001 tid_bitmap &= ~BIT(tid); 1002 1003 /* Don't mark as inactive any TID that has an active BA */ 1004 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1005 tid_bitmap &= ~BIT(tid); 1006 } 1007 1008 /* If all TIDs in the queue are inactive - return it can be reused */ 1009 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1010 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1011 return true; 1012 } 1013 1014 /* 1015 * If we are here, this is a shared queue and not all TIDs timed-out. 1016 * Remove the ones that did. 1017 */ 1018 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1019 u16 tid_bitmap; 1020 1021 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1022 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1023 1024 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1025 1026 /* 1027 * We need to take into account a situation in which a TXQ was 1028 * allocated to TID x, and then turned shared by adding TIDs y 1029 * and z. If TID x becomes inactive and is removed from the TXQ, 1030 * ownership must be given to one of the remaining TIDs. 1031 * This is mainly because if TID x continues - a new queue can't 1032 * be allocated for it as long as it is an owner of another TXQ. 1033 * 1034 * Mark this queue in the right bitmap, we'll send the command 1035 * to the firmware later. 1036 */ 1037 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1038 set_bit(queue, changetid_queues); 1039 1040 IWL_DEBUG_TX_QUEUES(mvm, 1041 "Removing inactive TID %d from shared Q:%d\n", 1042 tid, queue); 1043 } 1044 1045 IWL_DEBUG_TX_QUEUES(mvm, 1046 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1047 mvm->queue_info[queue].tid_bitmap); 1048 1049 /* 1050 * There may be different TIDs with the same mac queues, so make 1051 * sure all TIDs have existing corresponding mac queues enabled 1052 */ 1053 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1054 1055 /* If the queue is marked as shared - "unshare" it */ 1056 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1057 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1058 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1059 queue); 1060 set_bit(queue, unshare_queues); 1061 } 1062 1063 return false; 1064 } 1065 1066 /* 1067 * Check for inactivity - this includes checking if any queue 1068 * can be unshared and finding one (and only one) that can be 1069 * reused. 1070 * This function is also invoked as a sort of clean-up task, 1071 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1072 * 1073 * Returns the queue number, or -ENOSPC. 1074 */ 1075 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1076 { 1077 unsigned long now = jiffies; 1078 unsigned long unshare_queues = 0; 1079 unsigned long changetid_queues = 0; 1080 int i, ret, free_queue = -ENOSPC; 1081 struct ieee80211_sta *queue_owner = NULL; 1082 1083 lockdep_assert_held(&mvm->mutex); 1084 1085 if (iwl_mvm_has_new_tx_api(mvm)) 1086 return -ENOSPC; 1087 1088 rcu_read_lock(); 1089 1090 /* we skip the CMD queue below by starting at 1 */ 1091 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1092 1093 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1094 struct ieee80211_sta *sta; 1095 struct iwl_mvm_sta *mvmsta; 1096 u8 sta_id; 1097 int tid; 1098 unsigned long inactive_tid_bitmap = 0; 1099 unsigned long queue_tid_bitmap; 1100 1101 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1102 if (!queue_tid_bitmap) 1103 continue; 1104 1105 /* If TXQ isn't in active use anyway - nothing to do here... */ 1106 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1107 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1108 continue; 1109 1110 /* Check to see if there are inactive TIDs on this queue */ 1111 for_each_set_bit(tid, &queue_tid_bitmap, 1112 IWL_MAX_TID_COUNT + 1) { 1113 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1114 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1115 continue; 1116 1117 inactive_tid_bitmap |= BIT(tid); 1118 } 1119 1120 /* If all TIDs are active - finish check on this queue */ 1121 if (!inactive_tid_bitmap) 1122 continue; 1123 1124 /* 1125 * If we are here - the queue hadn't been served recently and is 1126 * in use 1127 */ 1128 1129 sta_id = mvm->queue_info[i].ra_sta_id; 1130 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1131 1132 /* 1133 * If the STA doesn't exist anymore, it isn't an error. It could 1134 * be that it was removed since getting the queues, and in this 1135 * case it should've inactivated its queues anyway. 1136 */ 1137 if (IS_ERR_OR_NULL(sta)) 1138 continue; 1139 1140 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1141 1142 spin_lock_bh(&mvmsta->lock); 1143 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1144 inactive_tid_bitmap, 1145 &unshare_queues, 1146 &changetid_queues); 1147 if (ret && free_queue < 0) { 1148 queue_owner = sta; 1149 free_queue = i; 1150 } 1151 /* only unlock sta lock - we still need the queue info lock */ 1152 spin_unlock_bh(&mvmsta->lock); 1153 } 1154 1155 1156 /* Reconfigure queues requiring reconfiguation */ 1157 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1158 iwl_mvm_unshare_queue(mvm, i); 1159 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1160 iwl_mvm_change_queue_tid(mvm, i); 1161 1162 rcu_read_unlock(); 1163 1164 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1165 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1166 alloc_for_sta); 1167 if (ret) 1168 return ret; 1169 } 1170 1171 return free_queue; 1172 } 1173 1174 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1175 struct ieee80211_sta *sta, u8 ac, int tid) 1176 { 1177 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1178 struct iwl_trans_txq_scd_cfg cfg = { 1179 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1180 .sta_id = mvmsta->sta_id, 1181 .tid = tid, 1182 .frame_limit = IWL_FRAME_LIMIT, 1183 }; 1184 unsigned int wdg_timeout = 1185 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1186 int queue = -1; 1187 unsigned long disable_agg_tids = 0; 1188 enum iwl_mvm_agg_state queue_state; 1189 bool shared_queue = false, inc_ssn; 1190 int ssn; 1191 unsigned long tfd_queue_mask; 1192 int ret; 1193 1194 lockdep_assert_held(&mvm->mutex); 1195 1196 if (iwl_mvm_has_new_tx_api(mvm)) 1197 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1198 1199 spin_lock_bh(&mvmsta->lock); 1200 tfd_queue_mask = mvmsta->tfd_queue_msk; 1201 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1202 spin_unlock_bh(&mvmsta->lock); 1203 1204 if (tid == IWL_MAX_TID_COUNT) { 1205 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1206 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1207 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1208 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1209 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1210 queue); 1211 1212 /* If no such queue is found, we'll use a DATA queue instead */ 1213 } 1214 1215 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1216 (mvm->queue_info[mvmsta->reserved_queue].status == 1217 IWL_MVM_QUEUE_RESERVED)) { 1218 queue = mvmsta->reserved_queue; 1219 mvm->queue_info[queue].reserved = true; 1220 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1221 } 1222 1223 if (queue < 0) 1224 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1225 IWL_MVM_DQA_MIN_DATA_QUEUE, 1226 IWL_MVM_DQA_MAX_DATA_QUEUE); 1227 if (queue < 0) { 1228 /* try harder - perhaps kill an inactive queue */ 1229 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1230 } 1231 1232 /* No free queue - we'll have to share */ 1233 if (queue <= 0) { 1234 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1235 if (queue > 0) { 1236 shared_queue = true; 1237 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1238 } 1239 } 1240 1241 /* 1242 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1243 * to make sure no one else takes it. 1244 * This will allow avoiding re-acquiring the lock at the end of the 1245 * configuration. On error we'll mark it back as free. 1246 */ 1247 if (queue > 0 && !shared_queue) 1248 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1249 1250 /* This shouldn't happen - out of queues */ 1251 if (WARN_ON(queue <= 0)) { 1252 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1253 tid, cfg.sta_id); 1254 return queue; 1255 } 1256 1257 /* 1258 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1259 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1260 * as aggregatable. 1261 * Mark all DATA queues as allowing to be aggregated at some point 1262 */ 1263 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1264 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1265 1266 IWL_DEBUG_TX_QUEUES(mvm, 1267 "Allocating %squeue #%d to sta %d on tid %d\n", 1268 shared_queue ? "shared " : "", queue, 1269 mvmsta->sta_id, tid); 1270 1271 if (shared_queue) { 1272 /* Disable any open aggs on this queue */ 1273 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1274 1275 if (disable_agg_tids) { 1276 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1277 queue); 1278 iwl_mvm_invalidate_sta_queue(mvm, queue, 1279 disable_agg_tids, false); 1280 } 1281 } 1282 1283 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1284 1285 /* 1286 * Mark queue as shared in transport if shared 1287 * Note this has to be done after queue enablement because enablement 1288 * can also set this value, and there is no indication there to shared 1289 * queues 1290 */ 1291 if (shared_queue) 1292 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1293 1294 spin_lock_bh(&mvmsta->lock); 1295 /* 1296 * This looks racy, but it is not. We have only one packet for 1297 * this ra/tid in our Tx path since we stop the Qdisc when we 1298 * need to allocate a new TFD queue. 1299 */ 1300 if (inc_ssn) { 1301 mvmsta->tid_data[tid].seq_number += 0x10; 1302 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1303 } 1304 mvmsta->tid_data[tid].txq_id = queue; 1305 mvmsta->tfd_queue_msk |= BIT(queue); 1306 queue_state = mvmsta->tid_data[tid].state; 1307 1308 if (mvmsta->reserved_queue == queue) 1309 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1310 spin_unlock_bh(&mvmsta->lock); 1311 1312 if (!shared_queue) { 1313 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1314 if (ret) 1315 goto out_err; 1316 1317 /* If we need to re-enable aggregations... */ 1318 if (queue_state == IWL_AGG_ON) { 1319 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1320 if (ret) 1321 goto out_err; 1322 } 1323 } else { 1324 /* Redirect queue, if needed */ 1325 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1326 wdg_timeout, false, 1327 iwl_mvm_txq_from_tid(sta, tid)); 1328 if (ret) 1329 goto out_err; 1330 } 1331 1332 return 0; 1333 1334 out_err: 1335 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1336 1337 return ret; 1338 } 1339 1340 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1341 { 1342 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1343 add_stream_wk); 1344 1345 mutex_lock(&mvm->mutex); 1346 1347 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1348 1349 while (!list_empty(&mvm->add_stream_txqs)) { 1350 struct iwl_mvm_txq *mvmtxq; 1351 struct ieee80211_txq *txq; 1352 u8 tid; 1353 1354 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1355 struct iwl_mvm_txq, list); 1356 1357 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1358 drv_priv); 1359 tid = txq->tid; 1360 if (tid == IEEE80211_NUM_TIDS) 1361 tid = IWL_MAX_TID_COUNT; 1362 1363 /* 1364 * We can't really do much here, but if this fails we can't 1365 * transmit anyway - so just don't transmit the frame etc. 1366 * and let them back up ... we've tried our best to allocate 1367 * a queue in the function itself. 1368 */ 1369 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1370 list_del_init(&mvmtxq->list); 1371 continue; 1372 } 1373 1374 list_del_init(&mvmtxq->list); 1375 local_bh_disable(); 1376 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1377 local_bh_enable(); 1378 } 1379 1380 mutex_unlock(&mvm->mutex); 1381 } 1382 1383 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1384 struct ieee80211_sta *sta, 1385 enum nl80211_iftype vif_type) 1386 { 1387 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1388 int queue; 1389 1390 /* queue reserving is disabled on new TX path */ 1391 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1392 return 0; 1393 1394 /* run the general cleanup/unsharing of queues */ 1395 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1396 1397 /* Make sure we have free resources for this STA */ 1398 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1399 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1400 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1401 IWL_MVM_QUEUE_FREE)) 1402 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1403 else 1404 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1405 IWL_MVM_DQA_MIN_DATA_QUEUE, 1406 IWL_MVM_DQA_MAX_DATA_QUEUE); 1407 if (queue < 0) { 1408 /* try again - this time kick out a queue if needed */ 1409 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1410 if (queue < 0) { 1411 IWL_ERR(mvm, "No available queues for new station\n"); 1412 return -ENOSPC; 1413 } 1414 } 1415 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1416 1417 mvmsta->reserved_queue = queue; 1418 1419 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1420 queue, mvmsta->sta_id); 1421 1422 return 0; 1423 } 1424 1425 /* 1426 * In DQA mode, after a HW restart the queues should be allocated as before, in 1427 * order to avoid race conditions when there are shared queues. This function 1428 * does the re-mapping and queue allocation. 1429 * 1430 * Note that re-enabling aggregations isn't done in this function. 1431 */ 1432 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1433 struct ieee80211_sta *sta) 1434 { 1435 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1436 unsigned int wdg = 1437 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1438 int i; 1439 struct iwl_trans_txq_scd_cfg cfg = { 1440 .sta_id = mvm_sta->sta_id, 1441 .frame_limit = IWL_FRAME_LIMIT, 1442 }; 1443 1444 /* Make sure reserved queue is still marked as such (if allocated) */ 1445 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1446 mvm->queue_info[mvm_sta->reserved_queue].status = 1447 IWL_MVM_QUEUE_RESERVED; 1448 1449 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1450 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1451 int txq_id = tid_data->txq_id; 1452 int ac; 1453 1454 if (txq_id == IWL_MVM_INVALID_QUEUE) 1455 continue; 1456 1457 ac = tid_to_mac80211_ac[i]; 1458 1459 if (iwl_mvm_has_new_tx_api(mvm)) { 1460 IWL_DEBUG_TX_QUEUES(mvm, 1461 "Re-mapping sta %d tid %d\n", 1462 mvm_sta->sta_id, i); 1463 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1464 i, wdg); 1465 /* 1466 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1467 * to try again later, we have no other good way of 1468 * failing here 1469 */ 1470 if (txq_id < 0) 1471 txq_id = IWL_MVM_INVALID_QUEUE; 1472 tid_data->txq_id = txq_id; 1473 1474 /* 1475 * Since we don't set the seq number after reset, and HW 1476 * sets it now, FW reset will cause the seq num to start 1477 * at 0 again, so driver will need to update it 1478 * internally as well, so it keeps in sync with real val 1479 */ 1480 tid_data->seq_number = 0; 1481 } else { 1482 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1483 1484 cfg.tid = i; 1485 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1486 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1487 txq_id == 1488 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1489 1490 IWL_DEBUG_TX_QUEUES(mvm, 1491 "Re-mapping sta %d tid %d to queue %d\n", 1492 mvm_sta->sta_id, i, txq_id); 1493 1494 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1495 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1496 } 1497 } 1498 } 1499 1500 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1501 struct iwl_mvm_int_sta *sta, 1502 const u8 *addr, 1503 u16 mac_id, u16 color) 1504 { 1505 struct iwl_mvm_add_sta_cmd cmd; 1506 int ret; 1507 u32 status = ADD_STA_SUCCESS; 1508 1509 lockdep_assert_held(&mvm->mutex); 1510 1511 memset(&cmd, 0, sizeof(cmd)); 1512 cmd.sta_id = sta->sta_id; 1513 1514 if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP, ADD_STA, 1515 0) >= 12 && 1516 sta->type == IWL_STA_AUX_ACTIVITY) 1517 cmd.mac_id_n_color = cpu_to_le32(mac_id); 1518 else 1519 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1520 color)); 1521 1522 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1523 cmd.station_type = sta->type; 1524 1525 if (!iwl_mvm_has_new_tx_api(mvm)) 1526 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1527 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1528 1529 if (addr) 1530 memcpy(cmd.addr, addr, ETH_ALEN); 1531 1532 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1533 iwl_mvm_add_sta_cmd_size(mvm), 1534 &cmd, &status); 1535 if (ret) 1536 return ret; 1537 1538 switch (status & IWL_ADD_STA_STATUS_MASK) { 1539 case ADD_STA_SUCCESS: 1540 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1541 return 0; 1542 default: 1543 ret = -EIO; 1544 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1545 status); 1546 break; 1547 } 1548 return ret; 1549 } 1550 1551 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1552 struct ieee80211_vif *vif, 1553 struct ieee80211_sta *sta) 1554 { 1555 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1556 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1557 struct iwl_mvm_rxq_dup_data *dup_data; 1558 int i, ret, sta_id; 1559 bool sta_update = false; 1560 unsigned int sta_flags = 0; 1561 1562 lockdep_assert_held(&mvm->mutex); 1563 1564 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1565 sta_id = iwl_mvm_find_free_sta_id(mvm, 1566 ieee80211_vif_type_p2p(vif)); 1567 else 1568 sta_id = mvm_sta->sta_id; 1569 1570 if (sta_id == IWL_MVM_INVALID_STA) 1571 return -ENOSPC; 1572 1573 spin_lock_init(&mvm_sta->lock); 1574 1575 /* if this is a HW restart re-alloc existing queues */ 1576 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1577 struct iwl_mvm_int_sta tmp_sta = { 1578 .sta_id = sta_id, 1579 .type = mvm_sta->sta_type, 1580 }; 1581 1582 /* 1583 * First add an empty station since allocating 1584 * a queue requires a valid station 1585 */ 1586 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1587 mvmvif->id, mvmvif->color); 1588 if (ret) 1589 goto err; 1590 1591 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1592 sta_update = true; 1593 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1594 goto update_fw; 1595 } 1596 1597 mvm_sta->sta_id = sta_id; 1598 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1599 mvmvif->color); 1600 mvm_sta->vif = vif; 1601 if (!mvm->trans->trans_cfg->gen2) 1602 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1603 else 1604 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1605 mvm_sta->tx_protection = 0; 1606 mvm_sta->tt_tx_protection = false; 1607 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1608 1609 /* HW restart, don't assume the memory has been zeroed */ 1610 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1611 mvm_sta->tfd_queue_msk = 0; 1612 1613 /* for HW restart - reset everything but the sequence number */ 1614 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1615 u16 seq = mvm_sta->tid_data[i].seq_number; 1616 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1617 mvm_sta->tid_data[i].seq_number = seq; 1618 1619 /* 1620 * Mark all queues for this STA as unallocated and defer TX 1621 * frames until the queue is allocated 1622 */ 1623 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1624 } 1625 1626 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1627 struct iwl_mvm_txq *mvmtxq = 1628 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1629 1630 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1631 INIT_LIST_HEAD(&mvmtxq->list); 1632 atomic_set(&mvmtxq->tx_request, 0); 1633 } 1634 1635 mvm_sta->agg_tids = 0; 1636 1637 if (iwl_mvm_has_new_rx_api(mvm) && 1638 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1639 int q; 1640 1641 dup_data = kcalloc(mvm->trans->num_rx_queues, 1642 sizeof(*dup_data), GFP_KERNEL); 1643 if (!dup_data) 1644 return -ENOMEM; 1645 /* 1646 * Initialize all the last_seq values to 0xffff which can never 1647 * compare equal to the frame's seq_ctrl in the check in 1648 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1649 * number and fragmented packets don't reach that function. 1650 * 1651 * This thus allows receiving a packet with seqno 0 and the 1652 * retry bit set as the very first packet on a new TID. 1653 */ 1654 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1655 memset(dup_data[q].last_seq, 0xff, 1656 sizeof(dup_data[q].last_seq)); 1657 mvm_sta->dup_data = dup_data; 1658 } 1659 1660 if (!iwl_mvm_has_new_tx_api(mvm)) { 1661 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1662 ieee80211_vif_type_p2p(vif)); 1663 if (ret) 1664 goto err; 1665 } 1666 1667 /* 1668 * if rs is registered with mac80211, then "add station" will be handled 1669 * via the corresponding ops, otherwise need to notify rate scaling here 1670 */ 1671 if (iwl_mvm_has_tlc_offload(mvm)) 1672 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1673 else 1674 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1675 1676 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1677 1678 update_fw: 1679 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1680 if (ret) 1681 goto err; 1682 1683 if (vif->type == NL80211_IFTYPE_STATION) { 1684 if (!sta->tdls) { 1685 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1686 mvmvif->ap_sta_id = sta_id; 1687 } else { 1688 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1689 } 1690 } 1691 1692 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1693 1694 return 0; 1695 1696 err: 1697 return ret; 1698 } 1699 1700 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1701 bool drain) 1702 { 1703 struct iwl_mvm_add_sta_cmd cmd = {}; 1704 int ret; 1705 u32 status; 1706 1707 lockdep_assert_held(&mvm->mutex); 1708 1709 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1710 cmd.sta_id = mvmsta->sta_id; 1711 cmd.add_modify = STA_MODE_MODIFY; 1712 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1713 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1714 1715 status = ADD_STA_SUCCESS; 1716 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1717 iwl_mvm_add_sta_cmd_size(mvm), 1718 &cmd, &status); 1719 if (ret) 1720 return ret; 1721 1722 switch (status & IWL_ADD_STA_STATUS_MASK) { 1723 case ADD_STA_SUCCESS: 1724 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1725 mvmsta->sta_id); 1726 break; 1727 default: 1728 ret = -EIO; 1729 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1730 mvmsta->sta_id); 1731 break; 1732 } 1733 1734 return ret; 1735 } 1736 1737 /* 1738 * Remove a station from the FW table. Before sending the command to remove 1739 * the station validate that the station is indeed known to the driver (sanity 1740 * only). 1741 */ 1742 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1743 { 1744 struct ieee80211_sta *sta; 1745 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1746 .sta_id = sta_id, 1747 }; 1748 int ret; 1749 1750 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1751 lockdep_is_held(&mvm->mutex)); 1752 1753 /* Note: internal stations are marked as error values */ 1754 if (!sta) { 1755 IWL_ERR(mvm, "Invalid station id\n"); 1756 return -EINVAL; 1757 } 1758 1759 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1760 sizeof(rm_sta_cmd), &rm_sta_cmd); 1761 if (ret) { 1762 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1763 return ret; 1764 } 1765 1766 return 0; 1767 } 1768 1769 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1770 struct ieee80211_vif *vif, 1771 struct ieee80211_sta *sta) 1772 { 1773 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1774 int i; 1775 1776 lockdep_assert_held(&mvm->mutex); 1777 1778 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1779 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1780 continue; 1781 1782 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1783 0); 1784 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1785 } 1786 1787 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1788 struct iwl_mvm_txq *mvmtxq = 1789 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1790 1791 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1792 } 1793 } 1794 1795 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1796 struct iwl_mvm_sta *mvm_sta) 1797 { 1798 int i; 1799 1800 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1801 u16 txq_id; 1802 int ret; 1803 1804 spin_lock_bh(&mvm_sta->lock); 1805 txq_id = mvm_sta->tid_data[i].txq_id; 1806 spin_unlock_bh(&mvm_sta->lock); 1807 1808 if (txq_id == IWL_MVM_INVALID_QUEUE) 1809 continue; 1810 1811 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1812 if (ret) 1813 return ret; 1814 } 1815 1816 return 0; 1817 } 1818 1819 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1820 struct ieee80211_vif *vif, 1821 struct ieee80211_sta *sta) 1822 { 1823 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1824 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1825 u8 sta_id = mvm_sta->sta_id; 1826 int ret; 1827 1828 lockdep_assert_held(&mvm->mutex); 1829 1830 if (iwl_mvm_has_new_rx_api(mvm)) 1831 kfree(mvm_sta->dup_data); 1832 1833 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1834 if (ret) 1835 return ret; 1836 1837 /* flush its queues here since we are freeing mvm_sta */ 1838 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false); 1839 if (ret) 1840 return ret; 1841 if (iwl_mvm_has_new_tx_api(mvm)) { 1842 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1843 } else { 1844 u32 q_mask = mvm_sta->tfd_queue_msk; 1845 1846 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1847 q_mask); 1848 } 1849 if (ret) 1850 return ret; 1851 1852 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1853 1854 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1855 1856 /* If there is a TXQ still marked as reserved - free it */ 1857 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1858 u8 reserved_txq = mvm_sta->reserved_queue; 1859 enum iwl_mvm_queue_status *status; 1860 1861 /* 1862 * If no traffic has gone through the reserved TXQ - it 1863 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1864 * should be manually marked as free again 1865 */ 1866 status = &mvm->queue_info[reserved_txq].status; 1867 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1868 (*status != IWL_MVM_QUEUE_FREE), 1869 "sta_id %d reserved txq %d status %d", 1870 sta_id, reserved_txq, *status)) 1871 return -EINVAL; 1872 1873 *status = IWL_MVM_QUEUE_FREE; 1874 } 1875 1876 if (vif->type == NL80211_IFTYPE_STATION && 1877 mvmvif->ap_sta_id == sta_id) { 1878 /* if associated - we can't remove the AP STA now */ 1879 if (vif->bss_conf.assoc) 1880 return ret; 1881 1882 /* unassoc - go ahead - remove the AP STA now */ 1883 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1884 } 1885 1886 /* 1887 * This shouldn't happen - the TDLS channel switch should be canceled 1888 * before the STA is removed. 1889 */ 1890 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1891 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1892 cancel_delayed_work(&mvm->tdls_cs.dwork); 1893 } 1894 1895 /* 1896 * Make sure that the tx response code sees the station as -EBUSY and 1897 * calls the drain worker. 1898 */ 1899 spin_lock_bh(&mvm_sta->lock); 1900 spin_unlock_bh(&mvm_sta->lock); 1901 1902 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1903 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1904 1905 return ret; 1906 } 1907 1908 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1909 struct ieee80211_vif *vif, 1910 u8 sta_id) 1911 { 1912 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1913 1914 lockdep_assert_held(&mvm->mutex); 1915 1916 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1917 return ret; 1918 } 1919 1920 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1921 struct iwl_mvm_int_sta *sta, 1922 u32 qmask, enum nl80211_iftype iftype, 1923 enum iwl_sta_type type) 1924 { 1925 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1926 sta->sta_id == IWL_MVM_INVALID_STA) { 1927 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1928 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1929 return -ENOSPC; 1930 } 1931 1932 sta->tfd_queue_msk = qmask; 1933 sta->type = type; 1934 1935 /* put a non-NULL value so iterating over the stations won't stop */ 1936 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1937 return 0; 1938 } 1939 1940 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1941 { 1942 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1943 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1944 sta->sta_id = IWL_MVM_INVALID_STA; 1945 } 1946 1947 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 1948 u8 sta_id, u8 fifo) 1949 { 1950 unsigned int wdg_timeout = 1951 mvm->trans->trans_cfg->base_params->wd_timeout; 1952 struct iwl_trans_txq_scd_cfg cfg = { 1953 .fifo = fifo, 1954 .sta_id = sta_id, 1955 .tid = IWL_MAX_TID_COUNT, 1956 .aggregate = false, 1957 .frame_limit = IWL_FRAME_LIMIT, 1958 }; 1959 1960 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1961 1962 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 1963 } 1964 1965 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 1966 { 1967 unsigned int wdg_timeout = 1968 mvm->trans->trans_cfg->base_params->wd_timeout; 1969 1970 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1971 1972 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 1973 wdg_timeout); 1974 } 1975 1976 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 1977 int maccolor, u8 *addr, 1978 struct iwl_mvm_int_sta *sta, 1979 u16 *queue, int fifo) 1980 { 1981 int ret; 1982 1983 /* Map queue to fifo - needs to happen before adding station */ 1984 if (!iwl_mvm_has_new_tx_api(mvm)) 1985 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 1986 1987 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor); 1988 if (ret) { 1989 if (!iwl_mvm_has_new_tx_api(mvm)) 1990 iwl_mvm_disable_txq(mvm, NULL, *queue, 1991 IWL_MAX_TID_COUNT, 0); 1992 return ret; 1993 } 1994 1995 /* 1996 * For 22000 firmware and on we cannot add queue to a station unknown 1997 * to firmware so enable queue here - after the station was added 1998 */ 1999 if (iwl_mvm_has_new_tx_api(mvm)) { 2000 int txq; 2001 2002 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2003 if (txq < 0) { 2004 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2005 return txq; 2006 } 2007 2008 *queue = txq; 2009 } 2010 2011 return 0; 2012 } 2013 2014 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id) 2015 { 2016 int ret; 2017 2018 lockdep_assert_held(&mvm->mutex); 2019 2020 /* Allocate aux station and assign to it the aux queue */ 2021 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2022 NL80211_IFTYPE_UNSPECIFIED, 2023 IWL_STA_AUX_ACTIVITY); 2024 if (ret) 2025 return ret; 2026 2027 /* 2028 * In CDB NICs we need to specify which lmac to use for aux activity 2029 * using the mac_id argument place to send lmac_id to the function 2030 */ 2031 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL, 2032 &mvm->aux_sta, &mvm->aux_queue, 2033 IWL_MVM_TX_FIFO_MCAST); 2034 if (ret) { 2035 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2036 return ret; 2037 } 2038 2039 return 0; 2040 } 2041 2042 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2043 { 2044 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2045 2046 lockdep_assert_held(&mvm->mutex); 2047 2048 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2049 NULL, &mvm->snif_sta, 2050 &mvm->snif_queue, 2051 IWL_MVM_TX_FIFO_BE); 2052 } 2053 2054 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2055 { 2056 int ret; 2057 2058 lockdep_assert_held(&mvm->mutex); 2059 2060 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA)) 2061 return -EINVAL; 2062 2063 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2064 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2065 if (ret) 2066 IWL_WARN(mvm, "Failed sending remove station\n"); 2067 2068 return ret; 2069 } 2070 2071 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2072 { 2073 int ret; 2074 2075 lockdep_assert_held(&mvm->mutex); 2076 2077 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA)) 2078 return -EINVAL; 2079 2080 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_queue, IWL_MAX_TID_COUNT, 0); 2081 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2082 if (ret) 2083 IWL_WARN(mvm, "Failed sending remove station\n"); 2084 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2085 2086 return ret; 2087 } 2088 2089 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2090 { 2091 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2092 } 2093 2094 /* 2095 * Send the add station command for the vif's broadcast station. 2096 * Assumes that the station was already allocated. 2097 * 2098 * @mvm: the mvm component 2099 * @vif: the interface to which the broadcast station is added 2100 * @bsta: the broadcast station to add. 2101 */ 2102 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2103 { 2104 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2105 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2106 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2107 const u8 *baddr = _baddr; 2108 int queue; 2109 int ret; 2110 unsigned int wdg_timeout = 2111 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2112 struct iwl_trans_txq_scd_cfg cfg = { 2113 .fifo = IWL_MVM_TX_FIFO_VO, 2114 .sta_id = mvmvif->bcast_sta.sta_id, 2115 .tid = IWL_MAX_TID_COUNT, 2116 .aggregate = false, 2117 .frame_limit = IWL_FRAME_LIMIT, 2118 }; 2119 2120 lockdep_assert_held(&mvm->mutex); 2121 2122 if (!iwl_mvm_has_new_tx_api(mvm)) { 2123 if (vif->type == NL80211_IFTYPE_AP || 2124 vif->type == NL80211_IFTYPE_ADHOC) { 2125 queue = mvm->probe_queue; 2126 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2127 queue = mvm->p2p_dev_queue; 2128 } else { 2129 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2130 return -EINVAL; 2131 } 2132 2133 bsta->tfd_queue_msk |= BIT(queue); 2134 2135 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2136 } 2137 2138 if (vif->type == NL80211_IFTYPE_ADHOC) 2139 baddr = vif->bss_conf.bssid; 2140 2141 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2142 return -ENOSPC; 2143 2144 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2145 mvmvif->id, mvmvif->color); 2146 if (ret) 2147 return ret; 2148 2149 /* 2150 * For 22000 firmware and on we cannot add queue to a station unknown 2151 * to firmware so enable queue here - after the station was added 2152 */ 2153 if (iwl_mvm_has_new_tx_api(mvm)) { 2154 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2155 IWL_MAX_TID_COUNT, 2156 wdg_timeout); 2157 if (queue < 0) { 2158 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2159 return queue; 2160 } 2161 2162 if (vif->type == NL80211_IFTYPE_AP || 2163 vif->type == NL80211_IFTYPE_ADHOC) 2164 mvm->probe_queue = queue; 2165 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2166 mvm->p2p_dev_queue = queue; 2167 } 2168 2169 return 0; 2170 } 2171 2172 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2173 struct ieee80211_vif *vif) 2174 { 2175 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2176 int queue; 2177 2178 lockdep_assert_held(&mvm->mutex); 2179 2180 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true); 2181 2182 switch (vif->type) { 2183 case NL80211_IFTYPE_AP: 2184 case NL80211_IFTYPE_ADHOC: 2185 queue = mvm->probe_queue; 2186 break; 2187 case NL80211_IFTYPE_P2P_DEVICE: 2188 queue = mvm->p2p_dev_queue; 2189 break; 2190 default: 2191 WARN(1, "Can't free bcast queue on vif type %d\n", 2192 vif->type); 2193 return; 2194 } 2195 2196 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2197 if (iwl_mvm_has_new_tx_api(mvm)) 2198 return; 2199 2200 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2201 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2202 } 2203 2204 /* Send the FW a request to remove the station from it's internal data 2205 * structures, but DO NOT remove the entry from the local data structures. */ 2206 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2207 { 2208 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2209 int ret; 2210 2211 lockdep_assert_held(&mvm->mutex); 2212 2213 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2214 2215 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2216 if (ret) 2217 IWL_WARN(mvm, "Failed sending remove station\n"); 2218 return ret; 2219 } 2220 2221 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2222 { 2223 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2224 2225 lockdep_assert_held(&mvm->mutex); 2226 2227 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2228 ieee80211_vif_type_p2p(vif), 2229 IWL_STA_GENERAL_PURPOSE); 2230 } 2231 2232 /* Allocate a new station entry for the broadcast station to the given vif, 2233 * and send it to the FW. 2234 * Note that each P2P mac should have its own broadcast station. 2235 * 2236 * @mvm: the mvm component 2237 * @vif: the interface to which the broadcast station is added 2238 * @bsta: the broadcast station to add. */ 2239 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2240 { 2241 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2242 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2243 int ret; 2244 2245 lockdep_assert_held(&mvm->mutex); 2246 2247 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2248 if (ret) 2249 return ret; 2250 2251 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2252 2253 if (ret) 2254 iwl_mvm_dealloc_int_sta(mvm, bsta); 2255 2256 return ret; 2257 } 2258 2259 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2260 { 2261 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2262 2263 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2264 } 2265 2266 /* 2267 * Send the FW a request to remove the station from it's internal data 2268 * structures, and in addition remove it from the local data structure. 2269 */ 2270 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2271 { 2272 int ret; 2273 2274 lockdep_assert_held(&mvm->mutex); 2275 2276 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2277 2278 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2279 2280 return ret; 2281 } 2282 2283 /* 2284 * Allocate a new station entry for the multicast station to the given vif, 2285 * and send it to the FW. 2286 * Note that each AP/GO mac should have its own multicast station. 2287 * 2288 * @mvm: the mvm component 2289 * @vif: the interface to which the multicast station is added 2290 */ 2291 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2292 { 2293 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2294 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2295 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2296 const u8 *maddr = _maddr; 2297 struct iwl_trans_txq_scd_cfg cfg = { 2298 .fifo = vif->type == NL80211_IFTYPE_AP ? 2299 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2300 .sta_id = msta->sta_id, 2301 .tid = 0, 2302 .aggregate = false, 2303 .frame_limit = IWL_FRAME_LIMIT, 2304 }; 2305 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2306 int ret; 2307 2308 lockdep_assert_held(&mvm->mutex); 2309 2310 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2311 vif->type != NL80211_IFTYPE_ADHOC)) 2312 return -ENOTSUPP; 2313 2314 /* 2315 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2316 * invalid, so make sure we use the queue we want. 2317 * Note that this is done here as we want to avoid making DQA 2318 * changes in mac80211 layer. 2319 */ 2320 if (vif->type == NL80211_IFTYPE_ADHOC) 2321 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2322 2323 /* 2324 * While in previous FWs we had to exclude cab queue from TFD queue 2325 * mask, now it is needed as any other queue. 2326 */ 2327 if (!iwl_mvm_has_new_tx_api(mvm) && 2328 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2329 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2330 timeout); 2331 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2332 } 2333 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2334 mvmvif->id, mvmvif->color); 2335 if (ret) 2336 goto err; 2337 2338 /* 2339 * Enable cab queue after the ADD_STA command is sent. 2340 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2341 * command with unknown station id, and for FW that doesn't support 2342 * station API since the cab queue is not included in the 2343 * tfd_queue_mask. 2344 */ 2345 if (iwl_mvm_has_new_tx_api(mvm)) { 2346 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2347 0, 2348 timeout); 2349 if (queue < 0) { 2350 ret = queue; 2351 goto err; 2352 } 2353 mvmvif->cab_queue = queue; 2354 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2355 IWL_UCODE_TLV_API_STA_TYPE)) 2356 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2357 timeout); 2358 2359 return 0; 2360 err: 2361 iwl_mvm_dealloc_int_sta(mvm, msta); 2362 return ret; 2363 } 2364 2365 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2366 struct ieee80211_key_conf *keyconf, 2367 bool mcast) 2368 { 2369 union { 2370 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2371 struct iwl_mvm_add_sta_key_cmd cmd; 2372 } u = {}; 2373 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2374 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2375 __le16 key_flags; 2376 int ret, size; 2377 u32 status; 2378 2379 /* This is a valid situation for GTK removal */ 2380 if (sta_id == IWL_MVM_INVALID_STA) 2381 return 0; 2382 2383 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2384 STA_KEY_FLG_KEYID_MSK); 2385 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2386 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2387 2388 if (mcast) 2389 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2390 2391 /* 2392 * The fields assigned here are in the same location at the start 2393 * of the command, so we can do this union trick. 2394 */ 2395 u.cmd.common.key_flags = key_flags; 2396 u.cmd.common.key_offset = keyconf->hw_key_idx; 2397 u.cmd.common.sta_id = sta_id; 2398 2399 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2400 2401 status = ADD_STA_SUCCESS; 2402 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2403 &status); 2404 2405 switch (status) { 2406 case ADD_STA_SUCCESS: 2407 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2408 break; 2409 default: 2410 ret = -EIO; 2411 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2412 break; 2413 } 2414 2415 return ret; 2416 } 2417 2418 /* 2419 * Send the FW a request to remove the station from it's internal data 2420 * structures, and in addition remove it from the local data structure. 2421 */ 2422 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2423 { 2424 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2425 int ret; 2426 2427 lockdep_assert_held(&mvm->mutex); 2428 2429 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true); 2430 2431 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2432 2433 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2434 if (ret) 2435 IWL_WARN(mvm, "Failed sending remove station\n"); 2436 2437 return ret; 2438 } 2439 2440 #define IWL_MAX_RX_BA_SESSIONS 16 2441 2442 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2443 { 2444 struct iwl_mvm_delba_data notif = { 2445 .baid = baid, 2446 }; 2447 2448 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true, 2449 ¬if, sizeof(notif)); 2450 }; 2451 2452 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2453 struct iwl_mvm_baid_data *data) 2454 { 2455 int i; 2456 2457 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2458 2459 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2460 int j; 2461 struct iwl_mvm_reorder_buffer *reorder_buf = 2462 &data->reorder_buf[i]; 2463 struct iwl_mvm_reorder_buf_entry *entries = 2464 &data->entries[i * data->entries_per_queue]; 2465 2466 spin_lock_bh(&reorder_buf->lock); 2467 if (likely(!reorder_buf->num_stored)) { 2468 spin_unlock_bh(&reorder_buf->lock); 2469 continue; 2470 } 2471 2472 /* 2473 * This shouldn't happen in regular DELBA since the internal 2474 * delBA notification should trigger a release of all frames in 2475 * the reorder buffer. 2476 */ 2477 WARN_ON(1); 2478 2479 for (j = 0; j < reorder_buf->buf_size; j++) 2480 __skb_queue_purge(&entries[j].e.frames); 2481 /* 2482 * Prevent timer re-arm. This prevents a very far fetched case 2483 * where we timed out on the notification. There may be prior 2484 * RX frames pending in the RX queue before the notification 2485 * that might get processed between now and the actual deletion 2486 * and we would re-arm the timer although we are deleting the 2487 * reorder buffer. 2488 */ 2489 reorder_buf->removed = true; 2490 spin_unlock_bh(&reorder_buf->lock); 2491 del_timer_sync(&reorder_buf->reorder_timer); 2492 } 2493 } 2494 2495 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2496 struct iwl_mvm_baid_data *data, 2497 u16 ssn, u16 buf_size) 2498 { 2499 int i; 2500 2501 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2502 struct iwl_mvm_reorder_buffer *reorder_buf = 2503 &data->reorder_buf[i]; 2504 struct iwl_mvm_reorder_buf_entry *entries = 2505 &data->entries[i * data->entries_per_queue]; 2506 int j; 2507 2508 reorder_buf->num_stored = 0; 2509 reorder_buf->head_sn = ssn; 2510 reorder_buf->buf_size = buf_size; 2511 /* rx reorder timer */ 2512 timer_setup(&reorder_buf->reorder_timer, 2513 iwl_mvm_reorder_timer_expired, 0); 2514 spin_lock_init(&reorder_buf->lock); 2515 reorder_buf->mvm = mvm; 2516 reorder_buf->queue = i; 2517 reorder_buf->valid = false; 2518 for (j = 0; j < reorder_buf->buf_size; j++) 2519 __skb_queue_head_init(&entries[j].e.frames); 2520 } 2521 } 2522 2523 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2524 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2525 { 2526 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2527 struct iwl_mvm_add_sta_cmd cmd = {}; 2528 struct iwl_mvm_baid_data *baid_data = NULL; 2529 int ret; 2530 u32 status; 2531 2532 lockdep_assert_held(&mvm->mutex); 2533 2534 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2535 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2536 return -ENOSPC; 2537 } 2538 2539 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2540 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2541 2542 /* sparse doesn't like the __align() so don't check */ 2543 #ifndef __CHECKER__ 2544 /* 2545 * The division below will be OK if either the cache line size 2546 * can be divided by the entry size (ALIGN will round up) or if 2547 * if the entry size can be divided by the cache line size, in 2548 * which case the ALIGN() will do nothing. 2549 */ 2550 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2551 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2552 #endif 2553 2554 /* 2555 * Upward align the reorder buffer size to fill an entire cache 2556 * line for each queue, to avoid sharing cache lines between 2557 * different queues. 2558 */ 2559 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2560 2561 /* 2562 * Allocate here so if allocation fails we can bail out early 2563 * before starting the BA session in the firmware 2564 */ 2565 baid_data = kzalloc(sizeof(*baid_data) + 2566 mvm->trans->num_rx_queues * 2567 reorder_buf_size, 2568 GFP_KERNEL); 2569 if (!baid_data) 2570 return -ENOMEM; 2571 2572 /* 2573 * This division is why we need the above BUILD_BUG_ON(), 2574 * if that doesn't hold then this will not be right. 2575 */ 2576 baid_data->entries_per_queue = 2577 reorder_buf_size / sizeof(baid_data->entries[0]); 2578 } 2579 2580 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2581 cmd.sta_id = mvm_sta->sta_id; 2582 cmd.add_modify = STA_MODE_MODIFY; 2583 if (start) { 2584 cmd.add_immediate_ba_tid = (u8) tid; 2585 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2586 cmd.rx_ba_window = cpu_to_le16(buf_size); 2587 } else { 2588 cmd.remove_immediate_ba_tid = (u8) tid; 2589 } 2590 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2591 STA_MODIFY_REMOVE_BA_TID; 2592 2593 status = ADD_STA_SUCCESS; 2594 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2595 iwl_mvm_add_sta_cmd_size(mvm), 2596 &cmd, &status); 2597 if (ret) 2598 goto out_free; 2599 2600 switch (status & IWL_ADD_STA_STATUS_MASK) { 2601 case ADD_STA_SUCCESS: 2602 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2603 start ? "start" : "stopp"); 2604 break; 2605 case ADD_STA_IMMEDIATE_BA_FAILURE: 2606 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2607 ret = -ENOSPC; 2608 break; 2609 default: 2610 ret = -EIO; 2611 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2612 start ? "start" : "stopp", status); 2613 break; 2614 } 2615 2616 if (ret) 2617 goto out_free; 2618 2619 if (start) { 2620 u8 baid; 2621 2622 mvm->rx_ba_sessions++; 2623 2624 if (!iwl_mvm_has_new_rx_api(mvm)) 2625 return 0; 2626 2627 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2628 ret = -EINVAL; 2629 goto out_free; 2630 } 2631 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2632 IWL_ADD_STA_BAID_SHIFT); 2633 baid_data->baid = baid; 2634 baid_data->timeout = timeout; 2635 baid_data->last_rx = jiffies; 2636 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2637 timer_setup(&baid_data->session_timer, 2638 iwl_mvm_rx_agg_session_expired, 0); 2639 baid_data->mvm = mvm; 2640 baid_data->tid = tid; 2641 baid_data->sta_id = mvm_sta->sta_id; 2642 2643 mvm_sta->tid_to_baid[tid] = baid; 2644 if (timeout) 2645 mod_timer(&baid_data->session_timer, 2646 TU_TO_EXP_TIME(timeout * 2)); 2647 2648 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2649 /* 2650 * protect the BA data with RCU to cover a case where our 2651 * internal RX sync mechanism will timeout (not that it's 2652 * supposed to happen) and we will free the session data while 2653 * RX is being processed in parallel 2654 */ 2655 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2656 mvm_sta->sta_id, tid, baid); 2657 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2658 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2659 } else { 2660 u8 baid = mvm_sta->tid_to_baid[tid]; 2661 2662 if (mvm->rx_ba_sessions > 0) 2663 /* check that restart flow didn't zero the counter */ 2664 mvm->rx_ba_sessions--; 2665 if (!iwl_mvm_has_new_rx_api(mvm)) 2666 return 0; 2667 2668 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2669 return -EINVAL; 2670 2671 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2672 if (WARN_ON(!baid_data)) 2673 return -EINVAL; 2674 2675 /* synchronize all rx queues so we can safely delete */ 2676 iwl_mvm_free_reorder(mvm, baid_data); 2677 del_timer_sync(&baid_data->session_timer); 2678 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2679 kfree_rcu(baid_data, rcu_head); 2680 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2681 } 2682 return 0; 2683 2684 out_free: 2685 kfree(baid_data); 2686 return ret; 2687 } 2688 2689 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2690 int tid, u8 queue, bool start) 2691 { 2692 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2693 struct iwl_mvm_add_sta_cmd cmd = {}; 2694 int ret; 2695 u32 status; 2696 2697 lockdep_assert_held(&mvm->mutex); 2698 2699 if (start) { 2700 mvm_sta->tfd_queue_msk |= BIT(queue); 2701 mvm_sta->tid_disable_agg &= ~BIT(tid); 2702 } else { 2703 /* In DQA-mode the queue isn't removed on agg termination */ 2704 mvm_sta->tid_disable_agg |= BIT(tid); 2705 } 2706 2707 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2708 cmd.sta_id = mvm_sta->sta_id; 2709 cmd.add_modify = STA_MODE_MODIFY; 2710 if (!iwl_mvm_has_new_tx_api(mvm)) 2711 cmd.modify_mask = STA_MODIFY_QUEUES; 2712 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2713 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2714 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2715 2716 status = ADD_STA_SUCCESS; 2717 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2718 iwl_mvm_add_sta_cmd_size(mvm), 2719 &cmd, &status); 2720 if (ret) 2721 return ret; 2722 2723 switch (status & IWL_ADD_STA_STATUS_MASK) { 2724 case ADD_STA_SUCCESS: 2725 break; 2726 default: 2727 ret = -EIO; 2728 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2729 start ? "start" : "stopp", status); 2730 break; 2731 } 2732 2733 return ret; 2734 } 2735 2736 const u8 tid_to_mac80211_ac[] = { 2737 IEEE80211_AC_BE, 2738 IEEE80211_AC_BK, 2739 IEEE80211_AC_BK, 2740 IEEE80211_AC_BE, 2741 IEEE80211_AC_VI, 2742 IEEE80211_AC_VI, 2743 IEEE80211_AC_VO, 2744 IEEE80211_AC_VO, 2745 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2746 }; 2747 2748 static const u8 tid_to_ucode_ac[] = { 2749 AC_BE, 2750 AC_BK, 2751 AC_BK, 2752 AC_BE, 2753 AC_VI, 2754 AC_VI, 2755 AC_VO, 2756 AC_VO, 2757 }; 2758 2759 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2760 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2761 { 2762 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2763 struct iwl_mvm_tid_data *tid_data; 2764 u16 normalized_ssn; 2765 u16 txq_id; 2766 int ret; 2767 2768 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2769 return -EINVAL; 2770 2771 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2772 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2773 IWL_ERR(mvm, 2774 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2775 mvmsta->tid_data[tid].state); 2776 return -ENXIO; 2777 } 2778 2779 lockdep_assert_held(&mvm->mutex); 2780 2781 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2782 iwl_mvm_has_new_tx_api(mvm)) { 2783 u8 ac = tid_to_mac80211_ac[tid]; 2784 2785 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2786 if (ret) 2787 return ret; 2788 } 2789 2790 spin_lock_bh(&mvmsta->lock); 2791 2792 /* 2793 * Note the possible cases: 2794 * 1. An enabled TXQ - TXQ needs to become agg'ed 2795 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2796 * it as reserved 2797 */ 2798 txq_id = mvmsta->tid_data[tid].txq_id; 2799 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2800 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2801 IWL_MVM_DQA_MIN_DATA_QUEUE, 2802 IWL_MVM_DQA_MAX_DATA_QUEUE); 2803 if (ret < 0) { 2804 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2805 goto out; 2806 } 2807 2808 txq_id = ret; 2809 2810 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2811 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2812 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2813 ret = -ENXIO; 2814 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2815 tid, IWL_MAX_HW_QUEUES - 1); 2816 goto out; 2817 2818 } else if (unlikely(mvm->queue_info[txq_id].status == 2819 IWL_MVM_QUEUE_SHARED)) { 2820 ret = -ENXIO; 2821 IWL_DEBUG_TX_QUEUES(mvm, 2822 "Can't start tid %d agg on shared queue!\n", 2823 tid); 2824 goto out; 2825 } 2826 2827 IWL_DEBUG_TX_QUEUES(mvm, 2828 "AGG for tid %d will be on queue #%d\n", 2829 tid, txq_id); 2830 2831 tid_data = &mvmsta->tid_data[tid]; 2832 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2833 tid_data->txq_id = txq_id; 2834 *ssn = tid_data->ssn; 2835 2836 IWL_DEBUG_TX_QUEUES(mvm, 2837 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2838 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2839 tid_data->next_reclaimed); 2840 2841 /* 2842 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2843 * to align the wrap around of ssn so we compare relevant values. 2844 */ 2845 normalized_ssn = tid_data->ssn; 2846 if (mvm->trans->trans_cfg->gen2) 2847 normalized_ssn &= 0xff; 2848 2849 if (normalized_ssn == tid_data->next_reclaimed) { 2850 tid_data->state = IWL_AGG_STARTING; 2851 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2852 } else { 2853 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2854 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA; 2855 } 2856 2857 out: 2858 spin_unlock_bh(&mvmsta->lock); 2859 2860 return ret; 2861 } 2862 2863 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2864 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2865 bool amsdu) 2866 { 2867 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2868 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2869 unsigned int wdg_timeout = 2870 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2871 int queue, ret; 2872 bool alloc_queue = true; 2873 enum iwl_mvm_queue_status queue_status; 2874 u16 ssn; 2875 2876 struct iwl_trans_txq_scd_cfg cfg = { 2877 .sta_id = mvmsta->sta_id, 2878 .tid = tid, 2879 .frame_limit = buf_size, 2880 .aggregate = true, 2881 }; 2882 2883 /* 2884 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2885 * manager, so this function should never be called in this case. 2886 */ 2887 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2888 return -EINVAL; 2889 2890 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2891 != IWL_MAX_TID_COUNT); 2892 2893 spin_lock_bh(&mvmsta->lock); 2894 ssn = tid_data->ssn; 2895 queue = tid_data->txq_id; 2896 tid_data->state = IWL_AGG_ON; 2897 mvmsta->agg_tids |= BIT(tid); 2898 tid_data->ssn = 0xffff; 2899 tid_data->amsdu_in_ampdu_allowed = amsdu; 2900 spin_unlock_bh(&mvmsta->lock); 2901 2902 if (iwl_mvm_has_new_tx_api(mvm)) { 2903 /* 2904 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2905 * would have failed, so if we are here there is no need to 2906 * allocate a queue. 2907 * However, if aggregation size is different than the default 2908 * size, the scheduler should be reconfigured. 2909 * We cannot do this with the new TX API, so return unsupported 2910 * for now, until it will be offloaded to firmware.. 2911 * Note that if SCD default value changes - this condition 2912 * should be updated as well. 2913 */ 2914 if (buf_size < IWL_FRAME_LIMIT) 2915 return -ENOTSUPP; 2916 2917 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2918 if (ret) 2919 return -EIO; 2920 goto out; 2921 } 2922 2923 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2924 2925 queue_status = mvm->queue_info[queue].status; 2926 2927 /* Maybe there is no need to even alloc a queue... */ 2928 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2929 alloc_queue = false; 2930 2931 /* 2932 * Only reconfig the SCD for the queue if the window size has 2933 * changed from current (become smaller) 2934 */ 2935 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2936 /* 2937 * If reconfiguring an existing queue, it first must be 2938 * drained 2939 */ 2940 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2941 BIT(queue)); 2942 if (ret) { 2943 IWL_ERR(mvm, 2944 "Error draining queue before reconfig\n"); 2945 return ret; 2946 } 2947 2948 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2949 mvmsta->sta_id, tid, 2950 buf_size, ssn); 2951 if (ret) { 2952 IWL_ERR(mvm, 2953 "Error reconfiguring TXQ #%d\n", queue); 2954 return ret; 2955 } 2956 } 2957 2958 if (alloc_queue) 2959 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2960 &cfg, wdg_timeout); 2961 2962 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2963 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2964 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2965 if (ret) 2966 return -EIO; 2967 } 2968 2969 /* No need to mark as reserved */ 2970 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2971 2972 out: 2973 /* 2974 * Even though in theory the peer could have different 2975 * aggregation reorder buffer sizes for different sessions, 2976 * our ucode doesn't allow for that and has a global limit 2977 * for each station. Therefore, use the minimum of all the 2978 * aggregation sessions and our default value. 2979 */ 2980 mvmsta->max_agg_bufsize = 2981 min(mvmsta->max_agg_bufsize, buf_size); 2982 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2983 2984 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2985 sta->addr, tid); 2986 2987 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 2988 } 2989 2990 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2991 struct iwl_mvm_sta *mvmsta, 2992 struct iwl_mvm_tid_data *tid_data) 2993 { 2994 u16 txq_id = tid_data->txq_id; 2995 2996 lockdep_assert_held(&mvm->mutex); 2997 2998 if (iwl_mvm_has_new_tx_api(mvm)) 2999 return; 3000 3001 /* 3002 * The TXQ is marked as reserved only if no traffic came through yet 3003 * This means no traffic has been sent on this TID (agg'd or not), so 3004 * we no longer have use for the queue. Since it hasn't even been 3005 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3006 * free. 3007 */ 3008 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3009 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3010 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3011 } 3012 } 3013 3014 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3015 struct ieee80211_sta *sta, u16 tid) 3016 { 3017 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3018 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3019 u16 txq_id; 3020 int err; 3021 3022 /* 3023 * If mac80211 is cleaning its state, then say that we finished since 3024 * our state has been cleared anyway. 3025 */ 3026 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3027 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3028 return 0; 3029 } 3030 3031 spin_lock_bh(&mvmsta->lock); 3032 3033 txq_id = tid_data->txq_id; 3034 3035 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3036 mvmsta->sta_id, tid, txq_id, tid_data->state); 3037 3038 mvmsta->agg_tids &= ~BIT(tid); 3039 3040 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3041 3042 switch (tid_data->state) { 3043 case IWL_AGG_ON: 3044 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3045 3046 IWL_DEBUG_TX_QUEUES(mvm, 3047 "ssn = %d, next_recl = %d\n", 3048 tid_data->ssn, tid_data->next_reclaimed); 3049 3050 tid_data->ssn = 0xffff; 3051 tid_data->state = IWL_AGG_OFF; 3052 spin_unlock_bh(&mvmsta->lock); 3053 3054 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3055 3056 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3057 return 0; 3058 case IWL_AGG_STARTING: 3059 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3060 /* 3061 * The agg session has been stopped before it was set up. This 3062 * can happen when the AddBA timer times out for example. 3063 */ 3064 3065 /* No barriers since we are under mutex */ 3066 lockdep_assert_held(&mvm->mutex); 3067 3068 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3069 tid_data->state = IWL_AGG_OFF; 3070 err = 0; 3071 break; 3072 default: 3073 IWL_ERR(mvm, 3074 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3075 mvmsta->sta_id, tid, tid_data->state); 3076 IWL_ERR(mvm, 3077 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3078 err = -EINVAL; 3079 } 3080 3081 spin_unlock_bh(&mvmsta->lock); 3082 3083 return err; 3084 } 3085 3086 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3087 struct ieee80211_sta *sta, u16 tid) 3088 { 3089 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3090 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3091 u16 txq_id; 3092 enum iwl_mvm_agg_state old_state; 3093 3094 /* 3095 * First set the agg state to OFF to avoid calling 3096 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3097 */ 3098 spin_lock_bh(&mvmsta->lock); 3099 txq_id = tid_data->txq_id; 3100 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3101 mvmsta->sta_id, tid, txq_id, tid_data->state); 3102 old_state = tid_data->state; 3103 tid_data->state = IWL_AGG_OFF; 3104 mvmsta->agg_tids &= ~BIT(tid); 3105 spin_unlock_bh(&mvmsta->lock); 3106 3107 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3108 3109 if (old_state >= IWL_AGG_ON) { 3110 iwl_mvm_drain_sta(mvm, mvmsta, true); 3111 3112 if (iwl_mvm_has_new_tx_api(mvm)) { 3113 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3114 BIT(tid))) 3115 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3116 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3117 } else { 3118 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id))) 3119 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3120 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3121 } 3122 3123 iwl_mvm_drain_sta(mvm, mvmsta, false); 3124 3125 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3126 } 3127 3128 return 0; 3129 } 3130 3131 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3132 { 3133 int i, max = -1, max_offs = -1; 3134 3135 lockdep_assert_held(&mvm->mutex); 3136 3137 /* Pick the unused key offset with the highest 'deleted' 3138 * counter. Every time a key is deleted, all the counters 3139 * are incremented and the one that was just deleted is 3140 * reset to zero. Thus, the highest counter is the one 3141 * that was deleted longest ago. Pick that one. 3142 */ 3143 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3144 if (test_bit(i, mvm->fw_key_table)) 3145 continue; 3146 if (mvm->fw_key_deleted[i] > max) { 3147 max = mvm->fw_key_deleted[i]; 3148 max_offs = i; 3149 } 3150 } 3151 3152 if (max_offs < 0) 3153 return STA_KEY_IDX_INVALID; 3154 3155 return max_offs; 3156 } 3157 3158 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3159 struct ieee80211_vif *vif, 3160 struct ieee80211_sta *sta) 3161 { 3162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3163 3164 if (sta) 3165 return iwl_mvm_sta_from_mac80211(sta); 3166 3167 /* 3168 * The device expects GTKs for station interfaces to be 3169 * installed as GTKs for the AP station. If we have no 3170 * station ID, then use AP's station ID. 3171 */ 3172 if (vif->type == NL80211_IFTYPE_STATION && 3173 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3174 u8 sta_id = mvmvif->ap_sta_id; 3175 3176 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3177 lockdep_is_held(&mvm->mutex)); 3178 3179 /* 3180 * It is possible that the 'sta' parameter is NULL, 3181 * for example when a GTK is removed - the sta_id will then 3182 * be the AP ID, and no station was passed by mac80211. 3183 */ 3184 if (IS_ERR_OR_NULL(sta)) 3185 return NULL; 3186 3187 return iwl_mvm_sta_from_mac80211(sta); 3188 } 3189 3190 return NULL; 3191 } 3192 3193 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3194 u32 sta_id, 3195 struct ieee80211_key_conf *key, bool mcast, 3196 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3197 u8 key_offset, bool mfp) 3198 { 3199 union { 3200 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3201 struct iwl_mvm_add_sta_key_cmd cmd; 3202 } u = {}; 3203 __le16 key_flags; 3204 int ret; 3205 u32 status; 3206 u16 keyidx; 3207 u64 pn = 0; 3208 int i, size; 3209 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3210 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3211 3212 if (sta_id == IWL_MVM_INVALID_STA) 3213 return -EINVAL; 3214 3215 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3216 STA_KEY_FLG_KEYID_MSK; 3217 key_flags = cpu_to_le16(keyidx); 3218 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3219 3220 switch (key->cipher) { 3221 case WLAN_CIPHER_SUITE_TKIP: 3222 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3223 if (new_api) { 3224 memcpy((void *)&u.cmd.tx_mic_key, 3225 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3226 IWL_MIC_KEY_SIZE); 3227 3228 memcpy((void *)&u.cmd.rx_mic_key, 3229 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3230 IWL_MIC_KEY_SIZE); 3231 pn = atomic64_read(&key->tx_pn); 3232 3233 } else { 3234 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3235 for (i = 0; i < 5; i++) 3236 u.cmd_v1.tkip_rx_ttak[i] = 3237 cpu_to_le16(tkip_p1k[i]); 3238 } 3239 memcpy(u.cmd.common.key, key->key, key->keylen); 3240 break; 3241 case WLAN_CIPHER_SUITE_CCMP: 3242 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3243 memcpy(u.cmd.common.key, key->key, key->keylen); 3244 if (new_api) 3245 pn = atomic64_read(&key->tx_pn); 3246 break; 3247 case WLAN_CIPHER_SUITE_WEP104: 3248 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3249 fallthrough; 3250 case WLAN_CIPHER_SUITE_WEP40: 3251 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3252 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3253 break; 3254 case WLAN_CIPHER_SUITE_GCMP_256: 3255 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3256 fallthrough; 3257 case WLAN_CIPHER_SUITE_GCMP: 3258 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3259 memcpy(u.cmd.common.key, key->key, key->keylen); 3260 if (new_api) 3261 pn = atomic64_read(&key->tx_pn); 3262 break; 3263 default: 3264 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3265 memcpy(u.cmd.common.key, key->key, key->keylen); 3266 } 3267 3268 if (mcast) 3269 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3270 if (mfp) 3271 key_flags |= cpu_to_le16(STA_KEY_MFP); 3272 3273 u.cmd.common.key_offset = key_offset; 3274 u.cmd.common.key_flags = key_flags; 3275 u.cmd.common.sta_id = sta_id; 3276 3277 if (new_api) { 3278 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3279 size = sizeof(u.cmd); 3280 } else { 3281 size = sizeof(u.cmd_v1); 3282 } 3283 3284 status = ADD_STA_SUCCESS; 3285 if (cmd_flags & CMD_ASYNC) 3286 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3287 &u.cmd); 3288 else 3289 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3290 &u.cmd, &status); 3291 3292 switch (status) { 3293 case ADD_STA_SUCCESS: 3294 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3295 break; 3296 default: 3297 ret = -EIO; 3298 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3299 break; 3300 } 3301 3302 return ret; 3303 } 3304 3305 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3306 struct ieee80211_key_conf *keyconf, 3307 u8 sta_id, bool remove_key) 3308 { 3309 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3310 3311 /* verify the key details match the required command's expectations */ 3312 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3313 (keyconf->keyidx != 4 && keyconf->keyidx != 5 && 3314 keyconf->keyidx != 6 && keyconf->keyidx != 7) || 3315 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3316 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3317 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3318 return -EINVAL; 3319 3320 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3321 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3322 return -EINVAL; 3323 3324 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3325 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3326 3327 if (remove_key) { 3328 /* This is a valid situation for IGTK */ 3329 if (sta_id == IWL_MVM_INVALID_STA) 3330 return 0; 3331 3332 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3333 } else { 3334 struct ieee80211_key_seq seq; 3335 const u8 *pn; 3336 3337 switch (keyconf->cipher) { 3338 case WLAN_CIPHER_SUITE_AES_CMAC: 3339 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3340 break; 3341 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3342 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3343 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3344 break; 3345 default: 3346 return -EINVAL; 3347 } 3348 3349 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3350 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3351 igtk_cmd.ctrl_flags |= 3352 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3353 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3354 pn = seq.aes_cmac.pn; 3355 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3356 ((u64) pn[4] << 8) | 3357 ((u64) pn[3] << 16) | 3358 ((u64) pn[2] << 24) | 3359 ((u64) pn[1] << 32) | 3360 ((u64) pn[0] << 40)); 3361 } 3362 3363 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n", 3364 remove_key ? "removing" : "installing", 3365 keyconf->keyidx >= 6 ? "B" : "", 3366 keyconf->keyidx, igtk_cmd.sta_id); 3367 3368 if (!iwl_mvm_has_new_rx_api(mvm)) { 3369 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3370 .ctrl_flags = igtk_cmd.ctrl_flags, 3371 .key_id = igtk_cmd.key_id, 3372 .sta_id = igtk_cmd.sta_id, 3373 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3374 }; 3375 3376 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3377 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3378 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3379 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3380 } 3381 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3382 sizeof(igtk_cmd), &igtk_cmd); 3383 } 3384 3385 3386 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3387 struct ieee80211_vif *vif, 3388 struct ieee80211_sta *sta) 3389 { 3390 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3391 3392 if (sta) 3393 return sta->addr; 3394 3395 if (vif->type == NL80211_IFTYPE_STATION && 3396 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3397 u8 sta_id = mvmvif->ap_sta_id; 3398 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3399 lockdep_is_held(&mvm->mutex)); 3400 return sta->addr; 3401 } 3402 3403 3404 return NULL; 3405 } 3406 3407 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3408 struct ieee80211_vif *vif, 3409 struct ieee80211_sta *sta, 3410 struct ieee80211_key_conf *keyconf, 3411 u8 key_offset, 3412 bool mcast) 3413 { 3414 int ret; 3415 const u8 *addr; 3416 struct ieee80211_key_seq seq; 3417 u16 p1k[5]; 3418 u32 sta_id; 3419 bool mfp = false; 3420 3421 if (sta) { 3422 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3423 3424 sta_id = mvm_sta->sta_id; 3425 mfp = sta->mfp; 3426 } else if (vif->type == NL80211_IFTYPE_AP && 3427 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3428 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3429 3430 sta_id = mvmvif->mcast_sta.sta_id; 3431 } else { 3432 IWL_ERR(mvm, "Failed to find station id\n"); 3433 return -EINVAL; 3434 } 3435 3436 switch (keyconf->cipher) { 3437 case WLAN_CIPHER_SUITE_TKIP: 3438 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3439 /* get phase 1 key from mac80211 */ 3440 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3441 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3442 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3443 seq.tkip.iv32, p1k, 0, key_offset, 3444 mfp); 3445 break; 3446 case WLAN_CIPHER_SUITE_CCMP: 3447 case WLAN_CIPHER_SUITE_WEP40: 3448 case WLAN_CIPHER_SUITE_WEP104: 3449 case WLAN_CIPHER_SUITE_GCMP: 3450 case WLAN_CIPHER_SUITE_GCMP_256: 3451 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3452 0, NULL, 0, key_offset, mfp); 3453 break; 3454 default: 3455 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3456 0, NULL, 0, key_offset, mfp); 3457 } 3458 3459 return ret; 3460 } 3461 3462 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3463 struct ieee80211_vif *vif, 3464 struct ieee80211_sta *sta, 3465 struct ieee80211_key_conf *keyconf, 3466 u8 key_offset) 3467 { 3468 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3469 struct iwl_mvm_sta *mvm_sta; 3470 u8 sta_id = IWL_MVM_INVALID_STA; 3471 int ret; 3472 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3473 3474 lockdep_assert_held(&mvm->mutex); 3475 3476 if (vif->type != NL80211_IFTYPE_AP || 3477 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3478 /* Get the station id from the mvm local station table */ 3479 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3480 if (!mvm_sta) { 3481 IWL_ERR(mvm, "Failed to find station\n"); 3482 return -EINVAL; 3483 } 3484 sta_id = mvm_sta->sta_id; 3485 3486 /* 3487 * It is possible that the 'sta' parameter is NULL, and thus 3488 * there is a need to retrieve the sta from the local station 3489 * table. 3490 */ 3491 if (!sta) { 3492 sta = rcu_dereference_protected( 3493 mvm->fw_id_to_mac_id[sta_id], 3494 lockdep_is_held(&mvm->mutex)); 3495 if (IS_ERR_OR_NULL(sta)) { 3496 IWL_ERR(mvm, "Invalid station id\n"); 3497 return -EINVAL; 3498 } 3499 } 3500 3501 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3502 return -EINVAL; 3503 } else { 3504 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3505 3506 sta_id = mvmvif->mcast_sta.sta_id; 3507 } 3508 3509 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3510 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3511 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3512 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3513 goto end; 3514 } 3515 3516 /* If the key_offset is not pre-assigned, we need to find a 3517 * new offset to use. In normal cases, the offset is not 3518 * pre-assigned, but during HW_RESTART we want to reuse the 3519 * same indices, so we pass them when this function is called. 3520 * 3521 * In D3 entry, we need to hardcoded the indices (because the 3522 * firmware hardcodes the PTK offset to 0). In this case, we 3523 * need to make sure we don't overwrite the hw_key_idx in the 3524 * keyconf structure, because otherwise we cannot configure 3525 * the original ones back when resuming. 3526 */ 3527 if (key_offset == STA_KEY_IDX_INVALID) { 3528 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3529 if (key_offset == STA_KEY_IDX_INVALID) 3530 return -ENOSPC; 3531 keyconf->hw_key_idx = key_offset; 3532 } 3533 3534 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3535 if (ret) 3536 goto end; 3537 3538 /* 3539 * For WEP, the same key is used for multicast and unicast. Upload it 3540 * again, using the same key offset, and now pointing the other one 3541 * to the same key slot (offset). 3542 * If this fails, remove the original as well. 3543 */ 3544 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3545 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3546 sta) { 3547 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3548 key_offset, !mcast); 3549 if (ret) { 3550 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3551 goto end; 3552 } 3553 } 3554 3555 __set_bit(key_offset, mvm->fw_key_table); 3556 3557 end: 3558 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3559 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3560 sta ? sta->addr : zero_addr, ret); 3561 return ret; 3562 } 3563 3564 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3565 struct ieee80211_vif *vif, 3566 struct ieee80211_sta *sta, 3567 struct ieee80211_key_conf *keyconf) 3568 { 3569 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3570 struct iwl_mvm_sta *mvm_sta; 3571 u8 sta_id = IWL_MVM_INVALID_STA; 3572 int ret, i; 3573 3574 lockdep_assert_held(&mvm->mutex); 3575 3576 /* Get the station from the mvm local station table */ 3577 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3578 if (mvm_sta) 3579 sta_id = mvm_sta->sta_id; 3580 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3581 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3582 3583 3584 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3585 keyconf->keyidx, sta_id); 3586 3587 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3588 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3589 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3590 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3591 3592 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3593 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3594 keyconf->hw_key_idx); 3595 return -ENOENT; 3596 } 3597 3598 /* track which key was deleted last */ 3599 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3600 if (mvm->fw_key_deleted[i] < U8_MAX) 3601 mvm->fw_key_deleted[i]++; 3602 } 3603 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3604 3605 if (sta && !mvm_sta) { 3606 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3607 return 0; 3608 } 3609 3610 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3611 if (ret) 3612 return ret; 3613 3614 /* delete WEP key twice to get rid of (now useless) offset */ 3615 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3616 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3617 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3618 3619 return ret; 3620 } 3621 3622 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3623 struct ieee80211_vif *vif, 3624 struct ieee80211_key_conf *keyconf, 3625 struct ieee80211_sta *sta, u32 iv32, 3626 u16 *phase1key) 3627 { 3628 struct iwl_mvm_sta *mvm_sta; 3629 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3630 bool mfp = sta ? sta->mfp : false; 3631 3632 rcu_read_lock(); 3633 3634 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3635 if (WARN_ON_ONCE(!mvm_sta)) 3636 goto unlock; 3637 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3638 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3639 mfp); 3640 3641 unlock: 3642 rcu_read_unlock(); 3643 } 3644 3645 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3646 struct ieee80211_sta *sta) 3647 { 3648 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3649 struct iwl_mvm_add_sta_cmd cmd = { 3650 .add_modify = STA_MODE_MODIFY, 3651 .sta_id = mvmsta->sta_id, 3652 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3653 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3654 }; 3655 int ret; 3656 3657 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3658 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3659 if (ret) 3660 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3661 } 3662 3663 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3664 struct ieee80211_sta *sta, 3665 enum ieee80211_frame_release_type reason, 3666 u16 cnt, u16 tids, bool more_data, 3667 bool single_sta_queue) 3668 { 3669 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3670 struct iwl_mvm_add_sta_cmd cmd = { 3671 .add_modify = STA_MODE_MODIFY, 3672 .sta_id = mvmsta->sta_id, 3673 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3674 .sleep_tx_count = cpu_to_le16(cnt), 3675 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3676 }; 3677 int tid, ret; 3678 unsigned long _tids = tids; 3679 3680 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3681 * Note that this field is reserved and unused by firmware not 3682 * supporting GO uAPSD, so it's safe to always do this. 3683 */ 3684 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3685 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3686 3687 /* If we're releasing frames from aggregation or dqa queues then check 3688 * if all the queues that we're releasing frames from, combined, have: 3689 * - more frames than the service period, in which case more_data 3690 * needs to be set 3691 * - fewer than 'cnt' frames, in which case we need to adjust the 3692 * firmware command (but do that unconditionally) 3693 */ 3694 if (single_sta_queue) { 3695 int remaining = cnt; 3696 int sleep_tx_count; 3697 3698 spin_lock_bh(&mvmsta->lock); 3699 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3700 struct iwl_mvm_tid_data *tid_data; 3701 u16 n_queued; 3702 3703 tid_data = &mvmsta->tid_data[tid]; 3704 3705 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3706 if (n_queued > remaining) { 3707 more_data = true; 3708 remaining = 0; 3709 break; 3710 } 3711 remaining -= n_queued; 3712 } 3713 sleep_tx_count = cnt - remaining; 3714 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3715 mvmsta->sleep_tx_count = sleep_tx_count; 3716 spin_unlock_bh(&mvmsta->lock); 3717 3718 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3719 if (WARN_ON(cnt - remaining == 0)) { 3720 ieee80211_sta_eosp(sta); 3721 return; 3722 } 3723 } 3724 3725 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3726 if (more_data) 3727 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3728 3729 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3730 mvmsta->next_status_eosp = true; 3731 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3732 } else { 3733 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3734 } 3735 3736 /* block the Tx queues until the FW updated the sleep Tx count */ 3737 iwl_trans_block_txq_ptrs(mvm->trans, true); 3738 3739 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3740 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3741 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3742 if (ret) 3743 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3744 } 3745 3746 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3747 struct iwl_rx_cmd_buffer *rxb) 3748 { 3749 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3750 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3751 struct ieee80211_sta *sta; 3752 u32 sta_id = le32_to_cpu(notif->sta_id); 3753 3754 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations)) 3755 return; 3756 3757 rcu_read_lock(); 3758 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3759 if (!IS_ERR_OR_NULL(sta)) 3760 ieee80211_sta_eosp(sta); 3761 rcu_read_unlock(); 3762 } 3763 3764 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3765 struct iwl_mvm_sta *mvmsta, bool disable) 3766 { 3767 struct iwl_mvm_add_sta_cmd cmd = { 3768 .add_modify = STA_MODE_MODIFY, 3769 .sta_id = mvmsta->sta_id, 3770 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3771 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3772 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3773 }; 3774 int ret; 3775 3776 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3777 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3778 if (ret) 3779 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3780 } 3781 3782 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3783 struct ieee80211_sta *sta, 3784 bool disable) 3785 { 3786 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3787 3788 spin_lock_bh(&mvm_sta->lock); 3789 3790 if (mvm_sta->disable_tx == disable) { 3791 spin_unlock_bh(&mvm_sta->lock); 3792 return; 3793 } 3794 3795 mvm_sta->disable_tx = disable; 3796 3797 /* Tell mac80211 to start/stop queuing tx for this station */ 3798 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3799 3800 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3801 3802 spin_unlock_bh(&mvm_sta->lock); 3803 } 3804 3805 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3806 struct iwl_mvm_vif *mvmvif, 3807 struct iwl_mvm_int_sta *sta, 3808 bool disable) 3809 { 3810 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3811 struct iwl_mvm_add_sta_cmd cmd = { 3812 .add_modify = STA_MODE_MODIFY, 3813 .sta_id = sta->sta_id, 3814 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3815 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3816 .mac_id_n_color = cpu_to_le32(id), 3817 }; 3818 int ret; 3819 3820 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3821 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3822 if (ret) 3823 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3824 } 3825 3826 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3827 struct iwl_mvm_vif *mvmvif, 3828 bool disable) 3829 { 3830 struct ieee80211_sta *sta; 3831 struct iwl_mvm_sta *mvm_sta; 3832 int i; 3833 3834 rcu_read_lock(); 3835 3836 /* Block/unblock all the stations of the given mvmvif */ 3837 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { 3838 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]); 3839 if (IS_ERR_OR_NULL(sta)) 3840 continue; 3841 3842 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3843 if (mvm_sta->mac_id_n_color != 3844 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3845 continue; 3846 3847 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3848 } 3849 3850 rcu_read_unlock(); 3851 3852 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3853 return; 3854 3855 /* Need to block/unblock also multicast station */ 3856 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3857 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3858 &mvmvif->mcast_sta, disable); 3859 3860 /* 3861 * Only unblock the broadcast station (FW blocks it for immediate 3862 * quiet, not the driver) 3863 */ 3864 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3865 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3866 &mvmvif->bcast_sta, disable); 3867 } 3868 3869 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3870 { 3871 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3872 struct iwl_mvm_sta *mvmsta; 3873 3874 rcu_read_lock(); 3875 3876 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3877 3878 if (!WARN_ON(!mvmsta)) 3879 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3880 3881 rcu_read_unlock(); 3882 } 3883 3884 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3885 { 3886 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3887 3888 /* 3889 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3890 * to align the wrap around of ssn so we compare relevant values. 3891 */ 3892 if (mvm->trans->trans_cfg->gen2) 3893 sn &= 0xff; 3894 3895 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3896 } 3897 3898 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3899 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher, 3900 u8 *key, u32 key_len) 3901 { 3902 int ret; 3903 u16 queue; 3904 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3905 struct ieee80211_key_conf *keyconf; 3906 3907 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0, 3908 NL80211_IFTYPE_UNSPECIFIED, 3909 IWL_STA_LINK); 3910 if (ret) 3911 return ret; 3912 3913 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 3914 addr, sta, &queue, 3915 IWL_MVM_TX_FIFO_BE); 3916 if (ret) 3917 goto out; 3918 3919 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL); 3920 if (!keyconf) { 3921 ret = -ENOBUFS; 3922 goto out; 3923 } 3924 3925 keyconf->cipher = cipher; 3926 memcpy(keyconf->key, key, key_len); 3927 keyconf->keylen = key_len; 3928 3929 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false, 3930 0, NULL, 0, 0, true); 3931 kfree(keyconf); 3932 return 0; 3933 out: 3934 iwl_mvm_dealloc_int_sta(mvm, sta); 3935 return ret; 3936 } 3937