1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2015, 2018-2023 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 int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, enum nl80211_iftype iftype) 28 { 29 int sta_id; 30 u32 reserved_ids = 0; 31 32 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32); 33 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 34 35 lockdep_assert_held(&mvm->mutex); 36 37 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 38 if (iftype != NL80211_IFTYPE_STATION) 39 reserved_ids = BIT(0); 40 41 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 42 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) { 43 if (BIT(sta_id) & reserved_ids) 44 continue; 45 46 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 47 lockdep_is_held(&mvm->mutex))) 48 return sta_id; 49 } 50 return IWL_MVM_INVALID_STA; 51 } 52 53 /* Calculate the ampdu density and max size */ 54 u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta, 55 struct ieee80211_bss_conf *link_conf, 56 u32 *_agg_size) 57 { 58 u32 agg_size = 0, mpdu_dens = 0; 59 60 if (WARN_ON(!link_sta)) 61 return 0; 62 63 /* Note that we always use only legacy & highest supported PPDUs, so 64 * of Draft P802.11be D.30 Table 10-12a--Fields used for calculating 65 * the maximum A-MPDU size of various PPDU types in different bands, 66 * we only need to worry about the highest supported PPDU type here. 67 */ 68 69 if (link_sta->ht_cap.ht_supported) { 70 agg_size = link_sta->ht_cap.ampdu_factor; 71 mpdu_dens = link_sta->ht_cap.ampdu_density; 72 } 73 74 if (link_conf->chandef.chan->band == NL80211_BAND_6GHZ) { 75 /* overwrite HT values on 6 GHz */ 76 mpdu_dens = le16_get_bits(link_sta->he_6ghz_capa.capa, 77 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START); 78 agg_size = le16_get_bits(link_sta->he_6ghz_capa.capa, 79 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP); 80 } else if (link_sta->vht_cap.vht_supported) { 81 /* if VHT supported overwrite HT value */ 82 agg_size = u32_get_bits(link_sta->vht_cap.cap, 83 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK); 84 } 85 86 /* D6.0 10.12.2 A-MPDU length limit rules 87 * A STA indicates the maximum length of the A-MPDU preEOF padding 88 * that it can receive in an HE PPDU in the Maximum A-MPDU Length 89 * Exponent field in its HT Capabilities, VHT Capabilities, 90 * and HE 6 GHz Band Capabilities elements (if present) and the 91 * Maximum AMPDU Length Exponent Extension field in its HE 92 * Capabilities element 93 */ 94 if (link_sta->he_cap.has_he) 95 agg_size += 96 u8_get_bits(link_sta->he_cap.he_cap_elem.mac_cap_info[3], 97 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK); 98 99 if (link_sta->eht_cap.has_eht) 100 agg_size += u8_get_bits(link_sta->eht_cap.eht_cap_elem.mac_cap_info[1], 101 IEEE80211_EHT_MAC_CAP1_MAX_AMPDU_LEN_MASK); 102 103 /* Limit to max A-MPDU supported by FW */ 104 agg_size = min_t(u32, agg_size, 105 STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT); 106 107 *_agg_size = agg_size; 108 return mpdu_dens; 109 } 110 111 u8 iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta *sta) 112 { 113 u8 uapsd_acs = 0; 114 115 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 116 uapsd_acs |= BIT(AC_BK); 117 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 118 uapsd_acs |= BIT(AC_BE); 119 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 120 uapsd_acs |= BIT(AC_VI); 121 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 122 uapsd_acs |= BIT(AC_VO); 123 124 return uapsd_acs | uapsd_acs << 4; 125 } 126 127 /* send station add/update command to firmware */ 128 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 129 bool update, unsigned int flags) 130 { 131 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 132 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 133 .sta_id = mvm_sta->deflink.sta_id, 134 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 135 .add_modify = update ? 1 : 0, 136 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 137 STA_FLG_MIMO_EN_MSK | 138 STA_FLG_RTS_MIMO_PROT), 139 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 140 }; 141 int ret; 142 u32 status; 143 u32 agg_size = 0, mpdu_dens = 0; 144 145 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 146 add_sta_cmd.station_type = mvm_sta->sta_type; 147 148 if (!update || (flags & STA_MODIFY_QUEUES)) { 149 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 150 151 if (!iwl_mvm_has_new_tx_api(mvm)) { 152 add_sta_cmd.tfd_queue_msk = 153 cpu_to_le32(mvm_sta->tfd_queue_msk); 154 155 if (flags & STA_MODIFY_QUEUES) 156 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 157 } else { 158 WARN_ON(flags & STA_MODIFY_QUEUES); 159 } 160 } 161 162 switch (sta->deflink.bandwidth) { 163 case IEEE80211_STA_RX_BW_320: 164 case IEEE80211_STA_RX_BW_160: 165 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 166 fallthrough; 167 case IEEE80211_STA_RX_BW_80: 168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 169 fallthrough; 170 case IEEE80211_STA_RX_BW_40: 171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 172 fallthrough; 173 case IEEE80211_STA_RX_BW_20: 174 if (sta->deflink.ht_cap.ht_supported) 175 add_sta_cmd.station_flags |= 176 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 177 break; 178 } 179 180 switch (sta->deflink.rx_nss) { 181 case 1: 182 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 183 break; 184 case 2: 185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 186 break; 187 case 3 ... 8: 188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 189 break; 190 } 191 192 switch (sta->deflink.smps_mode) { 193 case IEEE80211_SMPS_AUTOMATIC: 194 case IEEE80211_SMPS_NUM_MODES: 195 WARN_ON(1); 196 break; 197 case IEEE80211_SMPS_STATIC: 198 /* override NSS */ 199 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 200 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 201 break; 202 case IEEE80211_SMPS_DYNAMIC: 203 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 204 break; 205 case IEEE80211_SMPS_OFF: 206 /* nothing */ 207 break; 208 } 209 210 if (sta->deflink.ht_cap.ht_supported || 211 mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) 212 add_sta_cmd.station_flags_msk |= 213 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 214 STA_FLG_AGG_MPDU_DENS_MSK); 215 216 mpdu_dens = iwl_mvm_get_sta_ampdu_dens(&sta->deflink, 217 &mvm_sta->vif->bss_conf, 218 &agg_size); 219 add_sta_cmd.station_flags |= 220 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 221 add_sta_cmd.station_flags |= 222 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 223 224 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 225 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 226 227 if (sta->wme) { 228 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 229 add_sta_cmd.uapsd_acs = iwl_mvm_get_sta_uapsd_acs(sta); 230 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 231 } 232 233 status = ADD_STA_SUCCESS; 234 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 235 iwl_mvm_add_sta_cmd_size(mvm), 236 &add_sta_cmd, &status); 237 if (ret) 238 return ret; 239 240 switch (status & IWL_ADD_STA_STATUS_MASK) { 241 case ADD_STA_SUCCESS: 242 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 243 break; 244 default: 245 ret = -EIO; 246 IWL_ERR(mvm, "ADD_STA failed\n"); 247 break; 248 } 249 250 return ret; 251 } 252 253 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 254 { 255 struct iwl_mvm_baid_data *data = 256 from_timer(data, t, session_timer); 257 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 258 struct iwl_mvm_baid_data *ba_data; 259 struct ieee80211_sta *sta; 260 struct iwl_mvm_sta *mvm_sta; 261 unsigned long timeout; 262 unsigned int sta_id; 263 264 rcu_read_lock(); 265 266 ba_data = rcu_dereference(*rcu_ptr); 267 268 if (WARN_ON(!ba_data)) 269 goto unlock; 270 271 if (!ba_data->timeout) 272 goto unlock; 273 274 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 275 if (time_is_after_jiffies(timeout)) { 276 mod_timer(&ba_data->session_timer, timeout); 277 goto unlock; 278 } 279 280 /* Timer expired */ 281 sta_id = ffs(ba_data->sta_mask) - 1; /* don't care which one */ 282 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[sta_id]); 283 284 /* 285 * sta should be valid unless the following happens: 286 * The firmware asserts which triggers a reconfig flow, but 287 * the reconfig fails before we set the pointer to sta into 288 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 289 * A-MDPU and hence the timer continues to run. Then, the 290 * timer expires and sta is NULL. 291 */ 292 if (IS_ERR_OR_NULL(sta)) 293 goto unlock; 294 295 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 296 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 297 sta->addr, ba_data->tid); 298 unlock: 299 rcu_read_unlock(); 300 } 301 302 /* Disable aggregations for a bitmap of TIDs for a given station */ 303 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 304 unsigned long disable_agg_tids, 305 bool remove_queue) 306 { 307 struct iwl_mvm_add_sta_cmd cmd = {}; 308 struct ieee80211_sta *sta; 309 struct iwl_mvm_sta *mvmsta; 310 u32 status; 311 u8 sta_id; 312 313 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 314 return -EINVAL; 315 316 sta_id = mvm->queue_info[queue].ra_sta_id; 317 318 rcu_read_lock(); 319 320 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 321 322 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 323 rcu_read_unlock(); 324 return -EINVAL; 325 } 326 327 mvmsta = iwl_mvm_sta_from_mac80211(sta); 328 329 mvmsta->tid_disable_agg |= disable_agg_tids; 330 331 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 332 cmd.sta_id = mvmsta->deflink.sta_id; 333 cmd.add_modify = STA_MODE_MODIFY; 334 cmd.modify_mask = STA_MODIFY_QUEUES; 335 if (disable_agg_tids) 336 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 337 if (remove_queue) 338 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 339 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 340 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 341 342 rcu_read_unlock(); 343 344 /* Notify FW of queue removal from the STA queues */ 345 status = ADD_STA_SUCCESS; 346 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 347 iwl_mvm_add_sta_cmd_size(mvm), 348 &cmd, &status); 349 } 350 351 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 352 int sta_id, u16 *queueptr, u8 tid) 353 { 354 int queue = *queueptr; 355 struct iwl_scd_txq_cfg_cmd cmd = { 356 .scd_queue = queue, 357 .action = SCD_CFG_DISABLE_QUEUE, 358 }; 359 int ret; 360 361 lockdep_assert_held(&mvm->mutex); 362 363 if (iwl_mvm_has_new_tx_api(mvm)) { 364 if (mvm->sta_remove_requires_queue_remove) { 365 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, 366 SCD_QUEUE_CONFIG_CMD); 367 struct iwl_scd_queue_cfg_cmd remove_cmd = { 368 .operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE), 369 .u.remove.sta_mask = cpu_to_le32(BIT(sta_id)), 370 }; 371 372 if (tid == IWL_MAX_TID_COUNT) 373 tid = IWL_MGMT_TID; 374 375 remove_cmd.u.remove.tid = cpu_to_le32(tid); 376 377 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, 378 sizeof(remove_cmd), 379 &remove_cmd); 380 } else { 381 ret = 0; 382 } 383 384 iwl_trans_txq_free(mvm->trans, queue); 385 *queueptr = IWL_MVM_INVALID_QUEUE; 386 387 return ret; 388 } 389 390 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 391 return 0; 392 393 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 394 395 cmd.action = mvm->queue_info[queue].tid_bitmap ? 396 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 397 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 398 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 399 400 IWL_DEBUG_TX_QUEUES(mvm, 401 "Disabling TXQ #%d tids=0x%x\n", 402 queue, 403 mvm->queue_info[queue].tid_bitmap); 404 405 /* If the queue is still enabled - nothing left to do in this func */ 406 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 407 return 0; 408 409 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 410 cmd.tid = mvm->queue_info[queue].txq_tid; 411 412 /* Make sure queue info is correct even though we overwrite it */ 413 WARN(mvm->queue_info[queue].tid_bitmap, 414 "TXQ #%d info out-of-sync - tids=0x%x\n", 415 queue, mvm->queue_info[queue].tid_bitmap); 416 417 /* If we are here - the queue is freed and we can zero out these vals */ 418 mvm->queue_info[queue].tid_bitmap = 0; 419 420 if (sta) { 421 struct iwl_mvm_txq *mvmtxq = 422 iwl_mvm_txq_from_tid(sta, tid); 423 424 spin_lock_bh(&mvm->add_stream_lock); 425 list_del_init(&mvmtxq->list); 426 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 427 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 428 spin_unlock_bh(&mvm->add_stream_lock); 429 } 430 431 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 432 mvm->queue_info[queue].reserved = false; 433 434 iwl_trans_txq_disable(mvm->trans, queue, false); 435 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, 436 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 437 438 if (ret) 439 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 440 queue, ret); 441 return ret; 442 } 443 444 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 445 { 446 struct ieee80211_sta *sta; 447 struct iwl_mvm_sta *mvmsta; 448 unsigned long tid_bitmap; 449 unsigned long agg_tids = 0; 450 u8 sta_id; 451 int tid; 452 453 lockdep_assert_held(&mvm->mutex); 454 455 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 456 return -EINVAL; 457 458 sta_id = mvm->queue_info[queue].ra_sta_id; 459 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 460 461 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 462 lockdep_is_held(&mvm->mutex)); 463 464 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 465 return -EINVAL; 466 467 mvmsta = iwl_mvm_sta_from_mac80211(sta); 468 469 spin_lock_bh(&mvmsta->lock); 470 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 471 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 472 agg_tids |= BIT(tid); 473 } 474 spin_unlock_bh(&mvmsta->lock); 475 476 return agg_tids; 477 } 478 479 /* 480 * Remove a queue from a station's resources. 481 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 482 * doesn't disable the queue 483 */ 484 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 485 { 486 struct ieee80211_sta *sta; 487 struct iwl_mvm_sta *mvmsta; 488 unsigned long tid_bitmap; 489 unsigned long disable_agg_tids = 0; 490 u8 sta_id; 491 int tid; 492 493 lockdep_assert_held(&mvm->mutex); 494 495 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 496 return -EINVAL; 497 498 sta_id = mvm->queue_info[queue].ra_sta_id; 499 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 500 501 rcu_read_lock(); 502 503 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 504 505 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 506 rcu_read_unlock(); 507 return 0; 508 } 509 510 mvmsta = iwl_mvm_sta_from_mac80211(sta); 511 512 spin_lock_bh(&mvmsta->lock); 513 /* Unmap MAC queues and TIDs from this queue */ 514 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 515 struct iwl_mvm_txq *mvmtxq = 516 iwl_mvm_txq_from_tid(sta, tid); 517 518 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 519 disable_agg_tids |= BIT(tid); 520 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 521 522 spin_lock_bh(&mvm->add_stream_lock); 523 list_del_init(&mvmtxq->list); 524 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 525 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 526 spin_unlock_bh(&mvm->add_stream_lock); 527 } 528 529 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 530 spin_unlock_bh(&mvmsta->lock); 531 532 rcu_read_unlock(); 533 534 /* 535 * The TX path may have been using this TXQ_ID from the tid_data, 536 * so make sure it's no longer running so that we can safely reuse 537 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 538 * above, but nothing guarantees we've stopped using them. Thus, 539 * without this, we could get to iwl_mvm_disable_txq() and remove 540 * the queue while still sending frames to it. 541 */ 542 synchronize_net(); 543 544 return disable_agg_tids; 545 } 546 547 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 548 struct ieee80211_sta *old_sta, 549 u8 new_sta_id) 550 { 551 struct iwl_mvm_sta *mvmsta; 552 u8 sta_id, tid; 553 unsigned long disable_agg_tids = 0; 554 bool same_sta; 555 u16 queue_tmp = queue; 556 int ret; 557 558 lockdep_assert_held(&mvm->mutex); 559 560 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 561 return -EINVAL; 562 563 sta_id = mvm->queue_info[queue].ra_sta_id; 564 tid = mvm->queue_info[queue].txq_tid; 565 566 same_sta = sta_id == new_sta_id; 567 568 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 569 if (WARN_ON(!mvmsta)) 570 return -EINVAL; 571 572 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 573 /* Disable the queue */ 574 if (disable_agg_tids) 575 iwl_mvm_invalidate_sta_queue(mvm, queue, 576 disable_agg_tids, false); 577 578 ret = iwl_mvm_disable_txq(mvm, old_sta, sta_id, &queue_tmp, tid); 579 if (ret) { 580 IWL_ERR(mvm, 581 "Failed to free inactive queue %d (ret=%d)\n", 582 queue, ret); 583 584 return ret; 585 } 586 587 /* If TXQ is allocated to another STA, update removal in FW */ 588 if (!same_sta) 589 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 590 591 return 0; 592 } 593 594 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 595 unsigned long tfd_queue_mask, u8 ac) 596 { 597 int queue = 0; 598 u8 ac_to_queue[IEEE80211_NUM_ACS]; 599 int i; 600 601 /* 602 * This protects us against grabbing a queue that's being reconfigured 603 * by the inactivity checker. 604 */ 605 lockdep_assert_held(&mvm->mutex); 606 607 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 608 return -EINVAL; 609 610 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 611 612 /* See what ACs the existing queues for this STA have */ 613 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 614 /* Only DATA queues can be shared */ 615 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 616 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 617 continue; 618 619 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 620 } 621 622 /* 623 * The queue to share is chosen only from DATA queues as follows (in 624 * descending priority): 625 * 1. An AC_BE queue 626 * 2. Same AC queue 627 * 3. Highest AC queue that is lower than new AC 628 * 4. Any existing AC (there always is at least 1 DATA queue) 629 */ 630 631 /* Priority 1: An AC_BE queue */ 632 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 633 queue = ac_to_queue[IEEE80211_AC_BE]; 634 /* Priority 2: Same AC queue */ 635 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 636 queue = ac_to_queue[ac]; 637 /* Priority 3a: If new AC is VO and VI exists - use VI */ 638 else if (ac == IEEE80211_AC_VO && 639 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 640 queue = ac_to_queue[IEEE80211_AC_VI]; 641 /* Priority 3b: No BE so only AC less than the new one is BK */ 642 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 643 queue = ac_to_queue[IEEE80211_AC_BK]; 644 /* Priority 4a: No BE nor BK - use VI if exists */ 645 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 646 queue = ac_to_queue[IEEE80211_AC_VI]; 647 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 648 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 649 queue = ac_to_queue[IEEE80211_AC_VO]; 650 651 /* Make sure queue found (or not) is legal */ 652 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 653 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 654 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 655 IWL_ERR(mvm, "No DATA queues available to share\n"); 656 return -ENOSPC; 657 } 658 659 return queue; 660 } 661 662 /* Re-configure the SCD for a queue that has already been configured */ 663 static int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, 664 int sta_id, int tid, int frame_limit, u16 ssn) 665 { 666 struct iwl_scd_txq_cfg_cmd cmd = { 667 .scd_queue = queue, 668 .action = SCD_CFG_ENABLE_QUEUE, 669 .window = frame_limit, 670 .sta_id = sta_id, 671 .ssn = cpu_to_le16(ssn), 672 .tx_fifo = fifo, 673 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 674 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE), 675 .tid = tid, 676 }; 677 int ret; 678 679 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 680 return -EINVAL; 681 682 if (WARN(mvm->queue_info[queue].tid_bitmap == 0, 683 "Trying to reconfig unallocated queue %d\n", queue)) 684 return -ENXIO; 685 686 IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue); 687 688 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 689 WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n", 690 queue, fifo, ret); 691 692 return ret; 693 } 694 695 /* 696 * If a given queue has a higher AC than the TID stream that is being compared 697 * to, the queue needs to be redirected to the lower AC. This function does that 698 * in such a case, otherwise - if no redirection required - it does nothing, 699 * unless the %force param is true. 700 */ 701 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 702 int ac, int ssn, unsigned int wdg_timeout, 703 bool force, struct iwl_mvm_txq *txq) 704 { 705 struct iwl_scd_txq_cfg_cmd cmd = { 706 .scd_queue = queue, 707 .action = SCD_CFG_DISABLE_QUEUE, 708 }; 709 bool shared_queue; 710 int ret; 711 712 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 713 return -EINVAL; 714 715 /* 716 * If the AC is lower than current one - FIFO needs to be redirected to 717 * the lowest one of the streams in the queue. Check if this is needed 718 * here. 719 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 720 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 721 * we need to check if the numerical value of X is LARGER than of Y. 722 */ 723 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 724 IWL_DEBUG_TX_QUEUES(mvm, 725 "No redirection needed on TXQ #%d\n", 726 queue); 727 return 0; 728 } 729 730 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 731 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 732 cmd.tid = mvm->queue_info[queue].txq_tid; 733 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 734 735 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 736 queue, iwl_mvm_ac_to_tx_fifo[ac]); 737 738 /* Stop the queue and wait for it to empty */ 739 set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state); 740 741 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 742 if (ret) { 743 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 744 queue); 745 ret = -EIO; 746 goto out; 747 } 748 749 /* Before redirecting the queue we need to de-activate it */ 750 iwl_trans_txq_disable(mvm->trans, queue, false); 751 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 752 if (ret) 753 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 754 ret); 755 756 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 757 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 758 759 /* Update the TID "owner" of the queue */ 760 mvm->queue_info[queue].txq_tid = tid; 761 762 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 763 764 /* Redirect to lower AC */ 765 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 766 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 767 768 /* Update AC marking of the queue */ 769 mvm->queue_info[queue].mac80211_ac = ac; 770 771 /* 772 * Mark queue as shared in transport if shared 773 * Note this has to be done after queue enablement because enablement 774 * can also set this value, and there is no indication there to shared 775 * queues 776 */ 777 if (shared_queue) 778 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 779 780 out: 781 /* Continue using the queue */ 782 clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state); 783 784 return ret; 785 } 786 787 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 788 u8 minq, u8 maxq) 789 { 790 int i; 791 792 lockdep_assert_held(&mvm->mutex); 793 794 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues, 795 "max queue %d >= num_of_queues (%d)", maxq, 796 mvm->trans->trans_cfg->base_params->num_of_queues)) 797 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1; 798 799 /* This should not be hit with new TX path */ 800 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 801 return -ENOSPC; 802 803 /* Start by looking for a free queue */ 804 for (i = minq; i <= maxq; i++) 805 if (mvm->queue_info[i].tid_bitmap == 0 && 806 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 807 return i; 808 809 return -ENOSPC; 810 } 811 812 static int iwl_mvm_get_queue_size(struct ieee80211_sta *sta) 813 { 814 int max_size = IWL_DEFAULT_QUEUE_SIZE; 815 unsigned int link_id; 816 817 /* this queue isn't used for traffic (cab_queue) */ 818 if (!sta) 819 return IWL_MGMT_QUEUE_SIZE; 820 821 rcu_read_lock(); 822 823 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) { 824 struct ieee80211_link_sta *link = 825 rcu_dereference(sta->link[link_id]); 826 827 if (!link) 828 continue; 829 830 /* support for 1k ba size */ 831 if (link->eht_cap.has_eht && 832 max_size < IWL_DEFAULT_QUEUE_SIZE_EHT) 833 max_size = IWL_DEFAULT_QUEUE_SIZE_EHT; 834 835 /* support for 256 ba size */ 836 if (link->he_cap.has_he && 837 max_size < IWL_DEFAULT_QUEUE_SIZE_HE) 838 max_size = IWL_DEFAULT_QUEUE_SIZE_HE; 839 } 840 841 rcu_read_unlock(); 842 return max_size; 843 } 844 845 int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 846 struct ieee80211_sta *sta, 847 u8 sta_id, u8 tid, unsigned int timeout) 848 { 849 int queue, size; 850 u32 sta_mask = 0; 851 852 if (tid == IWL_MAX_TID_COUNT) { 853 tid = IWL_MGMT_TID; 854 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 855 mvm->trans->cfg->min_txq_size); 856 } else { 857 size = iwl_mvm_get_queue_size(sta); 858 } 859 860 /* take the min with bc tbl entries allowed */ 861 size = min_t(u32, size, mvm->trans->txqs.bc_tbl_size / sizeof(u16)); 862 863 /* size needs to be power of 2 values for calculating read/write pointers */ 864 size = rounddown_pow_of_two(size); 865 866 if (sta) { 867 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 868 unsigned int link_id; 869 870 for (link_id = 0; 871 link_id < ARRAY_SIZE(mvmsta->link); 872 link_id++) { 873 struct iwl_mvm_link_sta *link = 874 rcu_dereference_protected(mvmsta->link[link_id], 875 lockdep_is_held(&mvm->mutex)); 876 877 if (!link) 878 continue; 879 880 sta_mask |= BIT(link->sta_id); 881 } 882 } else { 883 sta_mask |= BIT(sta_id); 884 } 885 886 if (!sta_mask) 887 return -EINVAL; 888 889 do { 890 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask, 891 tid, size, timeout); 892 893 if (queue < 0) 894 IWL_DEBUG_TX_QUEUES(mvm, 895 "Failed allocating TXQ of size %d for sta mask %x tid %d, ret: %d\n", 896 size, sta_mask, tid, queue); 897 size /= 2; 898 } while (queue < 0 && size >= 16); 899 900 if (queue < 0) 901 return queue; 902 903 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta mask 0x%x tid %d\n", 904 queue, sta_mask, tid); 905 906 return queue; 907 } 908 909 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 910 struct ieee80211_sta *sta, u8 ac, 911 int tid) 912 { 913 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 914 struct iwl_mvm_txq *mvmtxq = 915 iwl_mvm_txq_from_tid(sta, tid); 916 unsigned int wdg_timeout = 917 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 918 int queue = -1; 919 920 lockdep_assert_held(&mvm->mutex); 921 922 IWL_DEBUG_TX_QUEUES(mvm, 923 "Allocating queue for sta %d on tid %d\n", 924 mvmsta->deflink.sta_id, tid); 925 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id, 926 tid, wdg_timeout); 927 if (queue < 0) 928 return queue; 929 930 mvmtxq->txq_id = queue; 931 mvm->tvqm_info[queue].txq_tid = tid; 932 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id; 933 934 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 935 936 spin_lock_bh(&mvmsta->lock); 937 mvmsta->tid_data[tid].txq_id = queue; 938 spin_unlock_bh(&mvmsta->lock); 939 940 return 0; 941 } 942 943 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 944 struct ieee80211_sta *sta, 945 int queue, u8 sta_id, u8 tid) 946 { 947 bool enable_queue = true; 948 949 /* Make sure this TID isn't already enabled */ 950 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 951 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 952 queue, tid); 953 return false; 954 } 955 956 /* Update mappings and refcounts */ 957 if (mvm->queue_info[queue].tid_bitmap) 958 enable_queue = false; 959 960 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 961 mvm->queue_info[queue].ra_sta_id = sta_id; 962 963 if (enable_queue) { 964 if (tid != IWL_MAX_TID_COUNT) 965 mvm->queue_info[queue].mac80211_ac = 966 tid_to_mac80211_ac[tid]; 967 else 968 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 969 970 mvm->queue_info[queue].txq_tid = tid; 971 } 972 973 if (sta) { 974 struct iwl_mvm_txq *mvmtxq = 975 iwl_mvm_txq_from_tid(sta, tid); 976 977 mvmtxq->txq_id = queue; 978 } 979 980 IWL_DEBUG_TX_QUEUES(mvm, 981 "Enabling TXQ #%d tids=0x%x\n", 982 queue, mvm->queue_info[queue].tid_bitmap); 983 984 return enable_queue; 985 } 986 987 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 988 int queue, u16 ssn, 989 const struct iwl_trans_txq_scd_cfg *cfg, 990 unsigned int wdg_timeout) 991 { 992 struct iwl_scd_txq_cfg_cmd cmd = { 993 .scd_queue = queue, 994 .action = SCD_CFG_ENABLE_QUEUE, 995 .window = cfg->frame_limit, 996 .sta_id = cfg->sta_id, 997 .ssn = cpu_to_le16(ssn), 998 .tx_fifo = cfg->fifo, 999 .aggregate = cfg->aggregate, 1000 .tid = cfg->tid, 1001 }; 1002 bool inc_ssn; 1003 1004 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1005 return false; 1006 1007 /* Send the enabling command if we need to */ 1008 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 1009 return false; 1010 1011 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 1012 NULL, wdg_timeout); 1013 if (inc_ssn) 1014 le16_add_cpu(&cmd.ssn, 1); 1015 1016 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 1017 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 1018 1019 return inc_ssn; 1020 } 1021 1022 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 1023 { 1024 struct iwl_scd_txq_cfg_cmd cmd = { 1025 .scd_queue = queue, 1026 .action = SCD_CFG_UPDATE_QUEUE_TID, 1027 }; 1028 int tid; 1029 unsigned long tid_bitmap; 1030 int ret; 1031 1032 lockdep_assert_held(&mvm->mutex); 1033 1034 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1035 return; 1036 1037 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1038 1039 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 1040 return; 1041 1042 /* Find any TID for queue */ 1043 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1044 cmd.tid = tid; 1045 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 1046 1047 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 1048 if (ret) { 1049 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 1050 queue, ret); 1051 return; 1052 } 1053 1054 mvm->queue_info[queue].txq_tid = tid; 1055 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 1056 queue, tid); 1057 } 1058 1059 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 1060 { 1061 struct ieee80211_sta *sta; 1062 struct iwl_mvm_sta *mvmsta; 1063 u8 sta_id; 1064 int tid = -1; 1065 unsigned long tid_bitmap; 1066 unsigned int wdg_timeout; 1067 int ssn; 1068 int ret = true; 1069 1070 /* queue sharing is disabled on new TX path */ 1071 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1072 return; 1073 1074 lockdep_assert_held(&mvm->mutex); 1075 1076 sta_id = mvm->queue_info[queue].ra_sta_id; 1077 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1078 1079 /* Find TID for queue, and make sure it is the only one on the queue */ 1080 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1081 if (tid_bitmap != BIT(tid)) { 1082 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 1083 queue, tid_bitmap); 1084 return; 1085 } 1086 1087 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 1088 tid); 1089 1090 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1091 lockdep_is_held(&mvm->mutex)); 1092 1093 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1094 return; 1095 1096 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1097 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1098 1099 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1100 1101 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 1102 tid_to_mac80211_ac[tid], ssn, 1103 wdg_timeout, true, 1104 iwl_mvm_txq_from_tid(sta, tid)); 1105 if (ret) { 1106 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 1107 return; 1108 } 1109 1110 /* If aggs should be turned back on - do it */ 1111 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1112 struct iwl_mvm_add_sta_cmd cmd = {0}; 1113 1114 mvmsta->tid_disable_agg &= ~BIT(tid); 1115 1116 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1117 cmd.sta_id = mvmsta->deflink.sta_id; 1118 cmd.add_modify = STA_MODE_MODIFY; 1119 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1120 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1121 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1122 1123 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1124 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1125 if (!ret) { 1126 IWL_DEBUG_TX_QUEUES(mvm, 1127 "TXQ #%d is now aggregated again\n", 1128 queue); 1129 1130 /* Mark queue intenally as aggregating again */ 1131 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1132 } 1133 } 1134 1135 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1136 } 1137 1138 /* 1139 * Remove inactive TIDs of a given queue. 1140 * If all queue TIDs are inactive - mark the queue as inactive 1141 * If only some the queue TIDs are inactive - unmap them from the queue 1142 * 1143 * Returns %true if all TIDs were removed and the queue could be reused. 1144 */ 1145 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1146 struct iwl_mvm_sta *mvmsta, int queue, 1147 unsigned long tid_bitmap, 1148 unsigned long *unshare_queues, 1149 unsigned long *changetid_queues) 1150 { 1151 unsigned int tid; 1152 1153 lockdep_assert_held(&mvmsta->lock); 1154 lockdep_assert_held(&mvm->mutex); 1155 1156 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1157 return false; 1158 1159 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1160 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1161 /* If some TFDs are still queued - don't mark TID as inactive */ 1162 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1163 tid_bitmap &= ~BIT(tid); 1164 1165 /* Don't mark as inactive any TID that has an active BA */ 1166 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1167 tid_bitmap &= ~BIT(tid); 1168 } 1169 1170 /* If all TIDs in the queue are inactive - return it can be reused */ 1171 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1172 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1173 return true; 1174 } 1175 1176 /* 1177 * If we are here, this is a shared queue and not all TIDs timed-out. 1178 * Remove the ones that did. 1179 */ 1180 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1181 u16 q_tid_bitmap; 1182 1183 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1184 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1185 1186 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1187 1188 /* 1189 * We need to take into account a situation in which a TXQ was 1190 * allocated to TID x, and then turned shared by adding TIDs y 1191 * and z. If TID x becomes inactive and is removed from the TXQ, 1192 * ownership must be given to one of the remaining TIDs. 1193 * This is mainly because if TID x continues - a new queue can't 1194 * be allocated for it as long as it is an owner of another TXQ. 1195 * 1196 * Mark this queue in the right bitmap, we'll send the command 1197 * to the firmware later. 1198 */ 1199 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1200 set_bit(queue, changetid_queues); 1201 1202 IWL_DEBUG_TX_QUEUES(mvm, 1203 "Removing inactive TID %d from shared Q:%d\n", 1204 tid, queue); 1205 } 1206 1207 IWL_DEBUG_TX_QUEUES(mvm, 1208 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1209 mvm->queue_info[queue].tid_bitmap); 1210 1211 /* 1212 * There may be different TIDs with the same mac queues, so make 1213 * sure all TIDs have existing corresponding mac queues enabled 1214 */ 1215 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1216 1217 /* If the queue is marked as shared - "unshare" it */ 1218 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1219 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1220 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1221 queue); 1222 set_bit(queue, unshare_queues); 1223 } 1224 1225 return false; 1226 } 1227 1228 /* 1229 * Check for inactivity - this includes checking if any queue 1230 * can be unshared and finding one (and only one) that can be 1231 * reused. 1232 * This function is also invoked as a sort of clean-up task, 1233 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1234 * 1235 * Returns the queue number, or -ENOSPC. 1236 */ 1237 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1238 { 1239 unsigned long now = jiffies; 1240 unsigned long unshare_queues = 0; 1241 unsigned long changetid_queues = 0; 1242 int i, ret, free_queue = -ENOSPC; 1243 struct ieee80211_sta *queue_owner = NULL; 1244 1245 lockdep_assert_held(&mvm->mutex); 1246 1247 if (iwl_mvm_has_new_tx_api(mvm)) 1248 return -ENOSPC; 1249 1250 rcu_read_lock(); 1251 1252 /* we skip the CMD queue below by starting at 1 */ 1253 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1254 1255 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1256 struct ieee80211_sta *sta; 1257 struct iwl_mvm_sta *mvmsta; 1258 u8 sta_id; 1259 int tid; 1260 unsigned long inactive_tid_bitmap = 0; 1261 unsigned long queue_tid_bitmap; 1262 1263 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1264 if (!queue_tid_bitmap) 1265 continue; 1266 1267 /* If TXQ isn't in active use anyway - nothing to do here... */ 1268 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1269 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1270 continue; 1271 1272 /* Check to see if there are inactive TIDs on this queue */ 1273 for_each_set_bit(tid, &queue_tid_bitmap, 1274 IWL_MAX_TID_COUNT + 1) { 1275 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1276 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1277 continue; 1278 1279 inactive_tid_bitmap |= BIT(tid); 1280 } 1281 1282 /* If all TIDs are active - finish check on this queue */ 1283 if (!inactive_tid_bitmap) 1284 continue; 1285 1286 /* 1287 * If we are here - the queue hadn't been served recently and is 1288 * in use 1289 */ 1290 1291 sta_id = mvm->queue_info[i].ra_sta_id; 1292 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1293 1294 /* 1295 * If the STA doesn't exist anymore, it isn't an error. It could 1296 * be that it was removed since getting the queues, and in this 1297 * case it should've inactivated its queues anyway. 1298 */ 1299 if (IS_ERR_OR_NULL(sta)) 1300 continue; 1301 1302 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1303 1304 spin_lock_bh(&mvmsta->lock); 1305 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1306 inactive_tid_bitmap, 1307 &unshare_queues, 1308 &changetid_queues); 1309 if (ret && free_queue < 0) { 1310 queue_owner = sta; 1311 free_queue = i; 1312 } 1313 /* only unlock sta lock - we still need the queue info lock */ 1314 spin_unlock_bh(&mvmsta->lock); 1315 } 1316 1317 1318 /* Reconfigure queues requiring reconfiguation */ 1319 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1320 iwl_mvm_unshare_queue(mvm, i); 1321 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1322 iwl_mvm_change_queue_tid(mvm, i); 1323 1324 rcu_read_unlock(); 1325 1326 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1327 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1328 alloc_for_sta); 1329 if (ret) 1330 return ret; 1331 } 1332 1333 return free_queue; 1334 } 1335 1336 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1337 struct ieee80211_sta *sta, u8 ac, int tid) 1338 { 1339 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1340 struct iwl_trans_txq_scd_cfg cfg = { 1341 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1342 .sta_id = mvmsta->deflink.sta_id, 1343 .tid = tid, 1344 .frame_limit = IWL_FRAME_LIMIT, 1345 }; 1346 unsigned int wdg_timeout = 1347 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1348 int queue = -1; 1349 u16 queue_tmp; 1350 unsigned long disable_agg_tids = 0; 1351 enum iwl_mvm_agg_state queue_state; 1352 bool shared_queue = false, inc_ssn; 1353 int ssn; 1354 unsigned long tfd_queue_mask; 1355 int ret; 1356 1357 lockdep_assert_held(&mvm->mutex); 1358 1359 if (iwl_mvm_has_new_tx_api(mvm)) 1360 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1361 1362 spin_lock_bh(&mvmsta->lock); 1363 tfd_queue_mask = mvmsta->tfd_queue_msk; 1364 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1365 spin_unlock_bh(&mvmsta->lock); 1366 1367 if (tid == IWL_MAX_TID_COUNT) { 1368 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 1369 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1370 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1371 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1372 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1373 queue); 1374 1375 /* If no such queue is found, we'll use a DATA queue instead */ 1376 } 1377 1378 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1379 (mvm->queue_info[mvmsta->reserved_queue].status == 1380 IWL_MVM_QUEUE_RESERVED)) { 1381 queue = mvmsta->reserved_queue; 1382 mvm->queue_info[queue].reserved = true; 1383 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1384 } 1385 1386 if (queue < 0) 1387 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 1388 IWL_MVM_DQA_MIN_DATA_QUEUE, 1389 IWL_MVM_DQA_MAX_DATA_QUEUE); 1390 if (queue < 0) { 1391 /* try harder - perhaps kill an inactive queue */ 1392 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id); 1393 } 1394 1395 /* No free queue - we'll have to share */ 1396 if (queue <= 0) { 1397 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1398 if (queue > 0) { 1399 shared_queue = true; 1400 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1401 } 1402 } 1403 1404 /* 1405 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1406 * to make sure no one else takes it. 1407 * This will allow avoiding re-acquiring the lock at the end of the 1408 * configuration. On error we'll mark it back as free. 1409 */ 1410 if (queue > 0 && !shared_queue) 1411 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1412 1413 /* This shouldn't happen - out of queues */ 1414 if (WARN_ON(queue <= 0)) { 1415 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1416 tid, cfg.sta_id); 1417 return queue; 1418 } 1419 1420 /* 1421 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1422 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1423 * as aggregatable. 1424 * Mark all DATA queues as allowing to be aggregated at some point 1425 */ 1426 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1427 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1428 1429 IWL_DEBUG_TX_QUEUES(mvm, 1430 "Allocating %squeue #%d to sta %d on tid %d\n", 1431 shared_queue ? "shared " : "", queue, 1432 mvmsta->deflink.sta_id, tid); 1433 1434 if (shared_queue) { 1435 /* Disable any open aggs on this queue */ 1436 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1437 1438 if (disable_agg_tids) { 1439 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1440 queue); 1441 iwl_mvm_invalidate_sta_queue(mvm, queue, 1442 disable_agg_tids, false); 1443 } 1444 } 1445 1446 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1447 1448 /* 1449 * Mark queue as shared in transport if shared 1450 * Note this has to be done after queue enablement because enablement 1451 * can also set this value, and there is no indication there to shared 1452 * queues 1453 */ 1454 if (shared_queue) 1455 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1456 1457 spin_lock_bh(&mvmsta->lock); 1458 /* 1459 * This looks racy, but it is not. We have only one packet for 1460 * this ra/tid in our Tx path since we stop the Qdisc when we 1461 * need to allocate a new TFD queue. 1462 */ 1463 if (inc_ssn) { 1464 mvmsta->tid_data[tid].seq_number += 0x10; 1465 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1466 } 1467 mvmsta->tid_data[tid].txq_id = queue; 1468 mvmsta->tfd_queue_msk |= BIT(queue); 1469 queue_state = mvmsta->tid_data[tid].state; 1470 1471 if (mvmsta->reserved_queue == queue) 1472 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1473 spin_unlock_bh(&mvmsta->lock); 1474 1475 if (!shared_queue) { 1476 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1477 if (ret) 1478 goto out_err; 1479 1480 /* If we need to re-enable aggregations... */ 1481 if (queue_state == IWL_AGG_ON) { 1482 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1483 if (ret) 1484 goto out_err; 1485 } 1486 } else { 1487 /* Redirect queue, if needed */ 1488 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1489 wdg_timeout, false, 1490 iwl_mvm_txq_from_tid(sta, tid)); 1491 if (ret) 1492 goto out_err; 1493 } 1494 1495 return 0; 1496 1497 out_err: 1498 queue_tmp = queue; 1499 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid); 1500 1501 return ret; 1502 } 1503 1504 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1505 { 1506 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1507 add_stream_wk); 1508 1509 mutex_lock(&mvm->mutex); 1510 1511 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1512 1513 while (!list_empty(&mvm->add_stream_txqs)) { 1514 struct iwl_mvm_txq *mvmtxq; 1515 struct ieee80211_txq *txq; 1516 u8 tid; 1517 1518 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1519 struct iwl_mvm_txq, list); 1520 1521 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1522 drv_priv); 1523 tid = txq->tid; 1524 if (tid == IEEE80211_NUM_TIDS) 1525 tid = IWL_MAX_TID_COUNT; 1526 1527 /* 1528 * We can't really do much here, but if this fails we can't 1529 * transmit anyway - so just don't transmit the frame etc. 1530 * and let them back up ... we've tried our best to allocate 1531 * a queue in the function itself. 1532 */ 1533 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1534 spin_lock_bh(&mvm->add_stream_lock); 1535 list_del_init(&mvmtxq->list); 1536 spin_unlock_bh(&mvm->add_stream_lock); 1537 continue; 1538 } 1539 1540 /* now we're ready, any remaining races/concurrency will be 1541 * handled in iwl_mvm_mac_itxq_xmit() 1542 */ 1543 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 1544 1545 local_bh_disable(); 1546 spin_lock(&mvm->add_stream_lock); 1547 list_del_init(&mvmtxq->list); 1548 spin_unlock(&mvm->add_stream_lock); 1549 1550 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1551 local_bh_enable(); 1552 } 1553 1554 mutex_unlock(&mvm->mutex); 1555 } 1556 1557 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1558 struct ieee80211_sta *sta, 1559 enum nl80211_iftype vif_type) 1560 { 1561 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1562 int queue; 1563 1564 /* queue reserving is disabled on new TX path */ 1565 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1566 return 0; 1567 1568 /* run the general cleanup/unsharing of queues */ 1569 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1570 1571 /* Make sure we have free resources for this STA */ 1572 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1573 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1574 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1575 IWL_MVM_QUEUE_FREE)) 1576 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1577 else 1578 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 1579 IWL_MVM_DQA_MIN_DATA_QUEUE, 1580 IWL_MVM_DQA_MAX_DATA_QUEUE); 1581 if (queue < 0) { 1582 /* try again - this time kick out a queue if needed */ 1583 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id); 1584 if (queue < 0) { 1585 IWL_ERR(mvm, "No available queues for new station\n"); 1586 return -ENOSPC; 1587 } 1588 } 1589 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1590 1591 mvmsta->reserved_queue = queue; 1592 1593 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1594 queue, mvmsta->deflink.sta_id); 1595 1596 return 0; 1597 } 1598 1599 /* 1600 * In DQA mode, after a HW restart the queues should be allocated as before, in 1601 * order to avoid race conditions when there are shared queues. This function 1602 * does the re-mapping and queue allocation. 1603 * 1604 * Note that re-enabling aggregations isn't done in this function. 1605 */ 1606 void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1607 struct ieee80211_sta *sta) 1608 { 1609 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1610 unsigned int wdg = 1611 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1612 int i; 1613 struct iwl_trans_txq_scd_cfg cfg = { 1614 .sta_id = mvm_sta->deflink.sta_id, 1615 .frame_limit = IWL_FRAME_LIMIT, 1616 }; 1617 1618 /* Make sure reserved queue is still marked as such (if allocated) */ 1619 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1620 mvm->queue_info[mvm_sta->reserved_queue].status = 1621 IWL_MVM_QUEUE_RESERVED; 1622 1623 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1624 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1625 int txq_id = tid_data->txq_id; 1626 int ac; 1627 1628 if (txq_id == IWL_MVM_INVALID_QUEUE) 1629 continue; 1630 1631 ac = tid_to_mac80211_ac[i]; 1632 1633 if (iwl_mvm_has_new_tx_api(mvm)) { 1634 IWL_DEBUG_TX_QUEUES(mvm, 1635 "Re-mapping sta %d tid %d\n", 1636 mvm_sta->deflink.sta_id, i); 1637 txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta, 1638 mvm_sta->deflink.sta_id, 1639 i, wdg); 1640 /* 1641 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1642 * to try again later, we have no other good way of 1643 * failing here 1644 */ 1645 if (txq_id < 0) 1646 txq_id = IWL_MVM_INVALID_QUEUE; 1647 tid_data->txq_id = txq_id; 1648 1649 /* 1650 * Since we don't set the seq number after reset, and HW 1651 * sets it now, FW reset will cause the seq num to start 1652 * at 0 again, so driver will need to update it 1653 * internally as well, so it keeps in sync with real val 1654 */ 1655 tid_data->seq_number = 0; 1656 } else { 1657 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1658 1659 cfg.tid = i; 1660 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1661 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1662 txq_id == 1663 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1664 1665 IWL_DEBUG_TX_QUEUES(mvm, 1666 "Re-mapping sta %d tid %d to queue %d\n", 1667 mvm_sta->deflink.sta_id, i, 1668 txq_id); 1669 1670 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1671 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1672 } 1673 } 1674 } 1675 1676 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1677 struct iwl_mvm_int_sta *sta, 1678 const u8 *addr, 1679 u16 mac_id, u16 color) 1680 { 1681 struct iwl_mvm_add_sta_cmd cmd; 1682 int ret; 1683 u32 status = ADD_STA_SUCCESS; 1684 1685 lockdep_assert_held(&mvm->mutex); 1686 1687 memset(&cmd, 0, sizeof(cmd)); 1688 cmd.sta_id = sta->sta_id; 1689 1690 if (iwl_mvm_has_new_station_api(mvm->fw) && 1691 sta->type == IWL_STA_AUX_ACTIVITY) 1692 cmd.mac_id_n_color = cpu_to_le32(mac_id); 1693 else 1694 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1695 color)); 1696 1697 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1698 cmd.station_type = sta->type; 1699 1700 if (!iwl_mvm_has_new_tx_api(mvm)) 1701 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1702 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1703 1704 if (addr) 1705 memcpy(cmd.addr, addr, ETH_ALEN); 1706 1707 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1708 iwl_mvm_add_sta_cmd_size(mvm), 1709 &cmd, &status); 1710 if (ret) 1711 return ret; 1712 1713 switch (status & IWL_ADD_STA_STATUS_MASK) { 1714 case ADD_STA_SUCCESS: 1715 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1716 return 0; 1717 default: 1718 ret = -EIO; 1719 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1720 status); 1721 break; 1722 } 1723 return ret; 1724 } 1725 1726 /* Initialize driver data of a new sta */ 1727 int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1728 struct ieee80211_sta *sta, int sta_id, u8 sta_type) 1729 { 1730 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1731 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1732 struct iwl_mvm_rxq_dup_data *dup_data; 1733 int i, ret = 0; 1734 1735 lockdep_assert_held(&mvm->mutex); 1736 1737 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1738 mvmvif->color); 1739 mvm_sta->vif = vif; 1740 1741 /* for MLD sta_id(s) should be allocated for each link before calling 1742 * this function 1743 */ 1744 if (!mvm->mld_api_is_used) { 1745 if (WARN_ON(sta_id == IWL_MVM_INVALID_STA)) 1746 return -EINVAL; 1747 1748 mvm_sta->deflink.sta_id = sta_id; 1749 rcu_assign_pointer(mvm_sta->link[0], &mvm_sta->deflink); 1750 1751 if (!mvm->trans->trans_cfg->gen2) 1752 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize = 1753 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1754 else 1755 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize = 1756 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1757 } 1758 1759 mvm_sta->tt_tx_protection = false; 1760 mvm_sta->sta_type = sta_type; 1761 1762 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1763 1764 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1765 /* 1766 * Mark all queues for this STA as unallocated and defer TX 1767 * frames until the queue is allocated 1768 */ 1769 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1770 } 1771 1772 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1773 struct iwl_mvm_txq *mvmtxq = 1774 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1775 1776 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1777 INIT_LIST_HEAD(&mvmtxq->list); 1778 atomic_set(&mvmtxq->tx_request, 0); 1779 } 1780 1781 if (iwl_mvm_has_new_rx_api(mvm)) { 1782 int q; 1783 1784 dup_data = kcalloc(mvm->trans->num_rx_queues, 1785 sizeof(*dup_data), GFP_KERNEL); 1786 if (!dup_data) 1787 return -ENOMEM; 1788 /* 1789 * Initialize all the last_seq values to 0xffff which can never 1790 * compare equal to the frame's seq_ctrl in the check in 1791 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1792 * number and fragmented packets don't reach that function. 1793 * 1794 * This thus allows receiving a packet with seqno 0 and the 1795 * retry bit set as the very first packet on a new TID. 1796 */ 1797 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1798 memset(dup_data[q].last_seq, 0xff, 1799 sizeof(dup_data[q].last_seq)); 1800 mvm_sta->dup_data = dup_data; 1801 } 1802 1803 if (!iwl_mvm_has_new_tx_api(mvm)) { 1804 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1805 ieee80211_vif_type_p2p(vif)); 1806 if (ret) 1807 return ret; 1808 } 1809 1810 /* 1811 * if rs is registered with mac80211, then "add station" will be handled 1812 * via the corresponding ops, otherwise need to notify rate scaling here 1813 */ 1814 if (iwl_mvm_has_tlc_offload(mvm)) 1815 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1816 else 1817 spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock); 1818 1819 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1820 1821 return 0; 1822 } 1823 1824 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1825 struct ieee80211_vif *vif, 1826 struct ieee80211_sta *sta) 1827 { 1828 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1829 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1830 int ret, sta_id; 1831 bool sta_update = false; 1832 unsigned int sta_flags = 0; 1833 1834 lockdep_assert_held(&mvm->mutex); 1835 1836 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1837 sta_id = iwl_mvm_find_free_sta_id(mvm, 1838 ieee80211_vif_type_p2p(vif)); 1839 else 1840 sta_id = mvm_sta->deflink.sta_id; 1841 1842 if (sta_id == IWL_MVM_INVALID_STA) 1843 return -ENOSPC; 1844 1845 spin_lock_init(&mvm_sta->lock); 1846 1847 /* if this is a HW restart re-alloc existing queues */ 1848 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1849 struct iwl_mvm_int_sta tmp_sta = { 1850 .sta_id = sta_id, 1851 .type = mvm_sta->sta_type, 1852 }; 1853 1854 /* First add an empty station since allocating 1855 * a queue requires a valid station 1856 */ 1857 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1858 mvmvif->id, mvmvif->color); 1859 if (ret) 1860 goto err; 1861 1862 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1863 sta_update = true; 1864 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1865 goto update_fw; 1866 } 1867 1868 ret = iwl_mvm_sta_init(mvm, vif, sta, sta_id, 1869 sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK); 1870 if (ret) 1871 goto err; 1872 1873 update_fw: 1874 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1875 if (ret) 1876 goto err; 1877 1878 if (vif->type == NL80211_IFTYPE_STATION) { 1879 if (!sta->tdls) { 1880 WARN_ON(mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA); 1881 mvmvif->deflink.ap_sta_id = sta_id; 1882 } else { 1883 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_MVM_INVALID_STA); 1884 } 1885 } 1886 1887 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1888 1889 return 0; 1890 1891 err: 1892 return ret; 1893 } 1894 1895 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1896 bool drain) 1897 { 1898 struct iwl_mvm_add_sta_cmd cmd = {}; 1899 int ret; 1900 u32 status; 1901 1902 lockdep_assert_held(&mvm->mutex); 1903 1904 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1905 cmd.sta_id = mvmsta->deflink.sta_id; 1906 cmd.add_modify = STA_MODE_MODIFY; 1907 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1908 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1909 1910 status = ADD_STA_SUCCESS; 1911 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1912 iwl_mvm_add_sta_cmd_size(mvm), 1913 &cmd, &status); 1914 if (ret) 1915 return ret; 1916 1917 switch (status & IWL_ADD_STA_STATUS_MASK) { 1918 case ADD_STA_SUCCESS: 1919 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1920 mvmsta->deflink.sta_id); 1921 break; 1922 default: 1923 ret = -EIO; 1924 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1925 mvmsta->deflink.sta_id); 1926 break; 1927 } 1928 1929 return ret; 1930 } 1931 1932 /* 1933 * Remove a station from the FW table. Before sending the command to remove 1934 * the station validate that the station is indeed known to the driver (sanity 1935 * only). 1936 */ 1937 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1938 { 1939 struct ieee80211_sta *sta; 1940 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1941 .sta_id = sta_id, 1942 }; 1943 int ret; 1944 1945 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1946 lockdep_is_held(&mvm->mutex)); 1947 1948 /* Note: internal stations are marked as error values */ 1949 if (!sta) { 1950 IWL_ERR(mvm, "Invalid station id\n"); 1951 return -EINVAL; 1952 } 1953 1954 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1955 sizeof(rm_sta_cmd), &rm_sta_cmd); 1956 if (ret) { 1957 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1958 return ret; 1959 } 1960 1961 return 0; 1962 } 1963 1964 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1965 struct ieee80211_vif *vif, 1966 struct ieee80211_sta *sta) 1967 { 1968 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1969 int i; 1970 1971 lockdep_assert_held(&mvm->mutex); 1972 1973 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1974 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1975 continue; 1976 1977 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id, 1978 &mvm_sta->tid_data[i].txq_id, i); 1979 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1980 } 1981 1982 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1983 struct iwl_mvm_txq *mvmtxq = 1984 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1985 1986 spin_lock_bh(&mvm->add_stream_lock); 1987 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1988 list_del_init(&mvmtxq->list); 1989 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 1990 spin_unlock_bh(&mvm->add_stream_lock); 1991 } 1992 } 1993 1994 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1995 struct iwl_mvm_sta *mvm_sta) 1996 { 1997 int i; 1998 1999 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 2000 u16 txq_id; 2001 int ret; 2002 2003 spin_lock_bh(&mvm_sta->lock); 2004 txq_id = mvm_sta->tid_data[i].txq_id; 2005 spin_unlock_bh(&mvm_sta->lock); 2006 2007 if (txq_id == IWL_MVM_INVALID_QUEUE) 2008 continue; 2009 2010 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2011 if (ret) 2012 return ret; 2013 } 2014 2015 return 0; 2016 } 2017 2018 /* Execute the common part for both MLD and non-MLD modes. 2019 * Returns if we're done with removing the station, either 2020 * with error or success 2021 */ 2022 bool iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2023 struct ieee80211_sta *sta, 2024 struct ieee80211_link_sta *link_sta, int *ret) 2025 { 2026 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2027 struct iwl_mvm_vif_link_info *mvm_link = 2028 mvmvif->link[link_sta->link_id]; 2029 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2030 struct iwl_mvm_link_sta *mvm_link_sta; 2031 u8 sta_id; 2032 2033 lockdep_assert_held(&mvm->mutex); 2034 2035 mvm_link_sta = 2036 rcu_dereference_protected(mvm_sta->link[link_sta->link_id], 2037 lockdep_is_held(&mvm->mutex)); 2038 sta_id = mvm_link_sta->sta_id; 2039 2040 /* If there is a TXQ still marked as reserved - free it */ 2041 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 2042 u8 reserved_txq = mvm_sta->reserved_queue; 2043 enum iwl_mvm_queue_status *status; 2044 2045 /* 2046 * If no traffic has gone through the reserved TXQ - it 2047 * is still marked as IWL_MVM_QUEUE_RESERVED, and 2048 * should be manually marked as free again 2049 */ 2050 status = &mvm->queue_info[reserved_txq].status; 2051 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 2052 (*status != IWL_MVM_QUEUE_FREE), 2053 "sta_id %d reserved txq %d status %d", 2054 sta_id, reserved_txq, *status)) { 2055 *ret = -EINVAL; 2056 return true; 2057 } 2058 2059 *status = IWL_MVM_QUEUE_FREE; 2060 } 2061 2062 if (vif->type == NL80211_IFTYPE_STATION) { 2063 /* if associated - we can't remove the AP STA now */ 2064 if (vif->cfg.assoc) 2065 return true; 2066 2067 /* first remove remaining keys */ 2068 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 0); 2069 2070 /* unassoc - go ahead - remove the AP STA now */ 2071 mvm_link->ap_sta_id = IWL_MVM_INVALID_STA; 2072 } 2073 2074 /* 2075 * This shouldn't happen - the TDLS channel switch should be canceled 2076 * before the STA is removed. 2077 */ 2078 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 2079 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 2080 cancel_delayed_work(&mvm->tdls_cs.dwork); 2081 } 2082 2083 return false; 2084 } 2085 2086 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 2087 struct ieee80211_vif *vif, 2088 struct ieee80211_sta *sta) 2089 { 2090 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2091 int ret; 2092 2093 lockdep_assert_held(&mvm->mutex); 2094 2095 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 2096 if (ret) 2097 return ret; 2098 2099 /* flush its queues here since we are freeing mvm_sta */ 2100 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false); 2101 if (ret) 2102 return ret; 2103 if (iwl_mvm_has_new_tx_api(mvm)) { 2104 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 2105 } else { 2106 u32 q_mask = mvm_sta->tfd_queue_msk; 2107 2108 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2109 q_mask); 2110 } 2111 if (ret) 2112 return ret; 2113 2114 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 2115 2116 iwl_mvm_disable_sta_queues(mvm, vif, sta); 2117 2118 if (iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink, &ret)) 2119 return ret; 2120 2121 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id); 2122 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL); 2123 2124 return ret; 2125 } 2126 2127 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 2128 struct ieee80211_vif *vif, 2129 u8 sta_id) 2130 { 2131 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 2132 2133 lockdep_assert_held(&mvm->mutex); 2134 2135 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 2136 return ret; 2137 } 2138 2139 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 2140 struct iwl_mvm_int_sta *sta, 2141 u32 qmask, enum nl80211_iftype iftype, 2142 u8 type) 2143 { 2144 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 2145 sta->sta_id == IWL_MVM_INVALID_STA) { 2146 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 2147 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 2148 return -ENOSPC; 2149 } 2150 2151 sta->tfd_queue_msk = qmask; 2152 sta->type = type; 2153 2154 /* put a non-NULL value so iterating over the stations won't stop */ 2155 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 2156 return 0; 2157 } 2158 2159 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 2160 { 2161 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 2162 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 2163 sta->sta_id = IWL_MVM_INVALID_STA; 2164 } 2165 2166 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 2167 u8 sta_id, u8 fifo) 2168 { 2169 unsigned int wdg_timeout = 2170 mvm->trans->trans_cfg->base_params->wd_timeout; 2171 struct iwl_trans_txq_scd_cfg cfg = { 2172 .fifo = fifo, 2173 .sta_id = sta_id, 2174 .tid = IWL_MAX_TID_COUNT, 2175 .aggregate = false, 2176 .frame_limit = IWL_FRAME_LIMIT, 2177 }; 2178 2179 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2180 2181 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2182 } 2183 2184 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 2185 { 2186 unsigned int wdg_timeout = 2187 mvm->trans->trans_cfg->base_params->wd_timeout; 2188 2189 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2190 2191 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT, 2192 wdg_timeout); 2193 } 2194 2195 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2196 int maccolor, u8 *addr, 2197 struct iwl_mvm_int_sta *sta, 2198 u16 *queue, int fifo) 2199 { 2200 int ret; 2201 2202 /* Map queue to fifo - needs to happen before adding station */ 2203 if (!iwl_mvm_has_new_tx_api(mvm)) 2204 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2205 2206 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor); 2207 if (ret) { 2208 if (!iwl_mvm_has_new_tx_api(mvm)) 2209 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue, 2210 IWL_MAX_TID_COUNT); 2211 return ret; 2212 } 2213 2214 /* 2215 * For 22000 firmware and on we cannot add queue to a station unknown 2216 * to firmware so enable queue here - after the station was added 2217 */ 2218 if (iwl_mvm_has_new_tx_api(mvm)) { 2219 int txq; 2220 2221 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2222 if (txq < 0) { 2223 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2224 return txq; 2225 } 2226 2227 *queue = txq; 2228 } 2229 2230 return 0; 2231 } 2232 2233 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id) 2234 { 2235 int ret; 2236 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 : 2237 BIT(mvm->aux_queue); 2238 2239 lockdep_assert_held(&mvm->mutex); 2240 2241 /* Allocate aux station and assign to it the aux queue */ 2242 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask, 2243 NL80211_IFTYPE_UNSPECIFIED, 2244 IWL_STA_AUX_ACTIVITY); 2245 if (ret) 2246 return ret; 2247 2248 /* 2249 * In CDB NICs we need to specify which lmac to use for aux activity 2250 * using the mac_id argument place to send lmac_id to the function 2251 */ 2252 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL, 2253 &mvm->aux_sta, &mvm->aux_queue, 2254 IWL_MVM_TX_FIFO_MCAST); 2255 if (ret) { 2256 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2257 return ret; 2258 } 2259 2260 return 0; 2261 } 2262 2263 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2264 { 2265 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2266 2267 lockdep_assert_held(&mvm->mutex); 2268 2269 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2270 NULL, &mvm->snif_sta, 2271 &mvm->snif_queue, 2272 IWL_MVM_TX_FIFO_BE); 2273 } 2274 2275 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2276 { 2277 int ret; 2278 2279 lockdep_assert_held(&mvm->mutex); 2280 2281 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA)) 2282 return -EINVAL; 2283 2284 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id, 2285 &mvm->snif_queue, IWL_MAX_TID_COUNT); 2286 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2287 if (ret) 2288 IWL_WARN(mvm, "Failed sending remove station\n"); 2289 2290 return ret; 2291 } 2292 2293 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2294 { 2295 int ret; 2296 2297 lockdep_assert_held(&mvm->mutex); 2298 2299 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA)) 2300 return -EINVAL; 2301 2302 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id, 2303 &mvm->aux_queue, IWL_MAX_TID_COUNT); 2304 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2305 if (ret) 2306 IWL_WARN(mvm, "Failed sending remove station\n"); 2307 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2308 2309 return ret; 2310 } 2311 2312 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2313 { 2314 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2315 } 2316 2317 /* 2318 * Send the add station command for the vif's broadcast station. 2319 * Assumes that the station was already allocated. 2320 * 2321 * @mvm: the mvm component 2322 * @vif: the interface to which the broadcast station is added 2323 * @bsta: the broadcast station to add. 2324 */ 2325 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2326 { 2327 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2328 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta; 2329 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2330 const u8 *baddr = _baddr; 2331 int queue; 2332 int ret; 2333 unsigned int wdg_timeout = 2334 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2335 struct iwl_trans_txq_scd_cfg cfg = { 2336 .fifo = IWL_MVM_TX_FIFO_VO, 2337 .sta_id = mvmvif->deflink.bcast_sta.sta_id, 2338 .tid = IWL_MAX_TID_COUNT, 2339 .aggregate = false, 2340 .frame_limit = IWL_FRAME_LIMIT, 2341 }; 2342 2343 lockdep_assert_held(&mvm->mutex); 2344 2345 if (!iwl_mvm_has_new_tx_api(mvm)) { 2346 if (vif->type == NL80211_IFTYPE_AP || 2347 vif->type == NL80211_IFTYPE_ADHOC) { 2348 queue = mvm->probe_queue; 2349 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2350 queue = mvm->p2p_dev_queue; 2351 } else { 2352 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2353 return -EINVAL; 2354 } 2355 2356 bsta->tfd_queue_msk |= BIT(queue); 2357 2358 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2359 } 2360 2361 if (vif->type == NL80211_IFTYPE_ADHOC) 2362 baddr = vif->bss_conf.bssid; 2363 2364 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2365 return -ENOSPC; 2366 2367 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2368 mvmvif->id, mvmvif->color); 2369 if (ret) 2370 return ret; 2371 2372 /* 2373 * For 22000 firmware and on we cannot add queue to a station unknown 2374 * to firmware so enable queue here - after the station was added 2375 */ 2376 if (iwl_mvm_has_new_tx_api(mvm)) { 2377 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id, 2378 IWL_MAX_TID_COUNT, 2379 wdg_timeout); 2380 if (queue < 0) { 2381 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2382 return queue; 2383 } 2384 2385 if (vif->type == NL80211_IFTYPE_AP || 2386 vif->type == NL80211_IFTYPE_ADHOC) { 2387 /* for queue management */ 2388 mvm->probe_queue = queue; 2389 /* for use in TX */ 2390 mvmvif->deflink.mgmt_queue = queue; 2391 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2392 mvm->p2p_dev_queue = queue; 2393 } 2394 } else if (vif->type == NL80211_IFTYPE_AP || 2395 vif->type == NL80211_IFTYPE_ADHOC) { 2396 /* set it for use in TX */ 2397 mvmvif->deflink.mgmt_queue = mvm->probe_queue; 2398 } 2399 2400 return 0; 2401 } 2402 2403 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2404 struct ieee80211_vif *vif) 2405 { 2406 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2407 u16 *queueptr, queue; 2408 2409 lockdep_assert_held(&mvm->mutex); 2410 2411 iwl_mvm_flush_sta(mvm, &mvmvif->deflink.bcast_sta, true); 2412 2413 switch (vif->type) { 2414 case NL80211_IFTYPE_AP: 2415 case NL80211_IFTYPE_ADHOC: 2416 queueptr = &mvm->probe_queue; 2417 break; 2418 case NL80211_IFTYPE_P2P_DEVICE: 2419 queueptr = &mvm->p2p_dev_queue; 2420 break; 2421 default: 2422 WARN(1, "Can't free bcast queue on vif type %d\n", 2423 vif->type); 2424 return; 2425 } 2426 2427 queue = *queueptr; 2428 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id, 2429 queueptr, IWL_MAX_TID_COUNT); 2430 2431 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC) 2432 mvmvif->deflink.mgmt_queue = mvm->probe_queue; 2433 2434 if (iwl_mvm_has_new_tx_api(mvm)) 2435 return; 2436 2437 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue))); 2438 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue); 2439 } 2440 2441 /* Send the FW a request to remove the station from it's internal data 2442 * structures, but DO NOT remove the entry from the local data structures. */ 2443 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2444 { 2445 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2446 int ret; 2447 2448 lockdep_assert_held(&mvm->mutex); 2449 2450 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2451 2452 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id); 2453 if (ret) 2454 IWL_WARN(mvm, "Failed sending remove station\n"); 2455 return ret; 2456 } 2457 2458 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2459 { 2460 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2461 2462 lockdep_assert_held(&mvm->mutex); 2463 2464 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0, 2465 ieee80211_vif_type_p2p(vif), 2466 IWL_STA_GENERAL_PURPOSE); 2467 } 2468 2469 /* Allocate a new station entry for the broadcast station to the given vif, 2470 * and send it to the FW. 2471 * Note that each P2P mac should have its own broadcast station. 2472 * 2473 * @mvm: the mvm component 2474 * @vif: the interface to which the broadcast station is added 2475 * @bsta: the broadcast station to add. */ 2476 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2477 { 2478 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2479 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta; 2480 int ret; 2481 2482 lockdep_assert_held(&mvm->mutex); 2483 2484 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2485 if (ret) 2486 return ret; 2487 2488 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2489 2490 if (ret) 2491 iwl_mvm_dealloc_int_sta(mvm, bsta); 2492 2493 return ret; 2494 } 2495 2496 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2497 { 2498 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2499 2500 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta); 2501 } 2502 2503 /* 2504 * Send the FW a request to remove the station from it's internal data 2505 * structures, and in addition remove it from the local data structure. 2506 */ 2507 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2508 { 2509 int ret; 2510 2511 lockdep_assert_held(&mvm->mutex); 2512 2513 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2514 2515 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2516 2517 return ret; 2518 } 2519 2520 /* 2521 * Allocate a new station entry for the multicast station to the given vif, 2522 * and send it to the FW. 2523 * Note that each AP/GO mac should have its own multicast station. 2524 * 2525 * @mvm: the mvm component 2526 * @vif: the interface to which the multicast station is added 2527 */ 2528 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2529 { 2530 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2531 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta; 2532 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2533 const u8 *maddr = _maddr; 2534 struct iwl_trans_txq_scd_cfg cfg = { 2535 .fifo = vif->type == NL80211_IFTYPE_AP ? 2536 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2537 .sta_id = msta->sta_id, 2538 .tid = 0, 2539 .aggregate = false, 2540 .frame_limit = IWL_FRAME_LIMIT, 2541 }; 2542 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2543 int ret; 2544 2545 lockdep_assert_held(&mvm->mutex); 2546 2547 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2548 vif->type != NL80211_IFTYPE_ADHOC)) 2549 return -ENOTSUPP; 2550 2551 /* 2552 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2553 * invalid, so make sure we use the queue we want. 2554 * Note that this is done here as we want to avoid making DQA 2555 * changes in mac80211 layer. 2556 */ 2557 if (vif->type == NL80211_IFTYPE_ADHOC) 2558 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2559 2560 /* 2561 * While in previous FWs we had to exclude cab queue from TFD queue 2562 * mask, now it is needed as any other queue. 2563 */ 2564 if (!iwl_mvm_has_new_tx_api(mvm) && 2565 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2566 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0, 2567 &cfg, 2568 timeout); 2569 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue); 2570 } 2571 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2572 mvmvif->id, mvmvif->color); 2573 if (ret) 2574 goto err; 2575 2576 /* 2577 * Enable cab queue after the ADD_STA command is sent. 2578 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2579 * command with unknown station id, and for FW that doesn't support 2580 * station API since the cab queue is not included in the 2581 * tfd_queue_mask. 2582 */ 2583 if (iwl_mvm_has_new_tx_api(mvm)) { 2584 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id, 2585 0, timeout); 2586 if (queue < 0) { 2587 ret = queue; 2588 goto err; 2589 } 2590 mvmvif->deflink.cab_queue = queue; 2591 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2592 IWL_UCODE_TLV_API_STA_TYPE)) 2593 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0, 2594 &cfg, 2595 timeout); 2596 2597 return 0; 2598 err: 2599 iwl_mvm_dealloc_int_sta(mvm, msta); 2600 return ret; 2601 } 2602 2603 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2604 struct ieee80211_key_conf *keyconf, 2605 bool mcast) 2606 { 2607 union { 2608 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2609 struct iwl_mvm_add_sta_key_cmd cmd; 2610 } u = {}; 2611 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2612 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2613 __le16 key_flags; 2614 int ret, size; 2615 u32 status; 2616 2617 /* This is a valid situation for GTK removal */ 2618 if (sta_id == IWL_MVM_INVALID_STA) 2619 return 0; 2620 2621 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2622 STA_KEY_FLG_KEYID_MSK); 2623 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2624 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2625 2626 if (mcast) 2627 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2628 2629 /* 2630 * The fields assigned here are in the same location at the start 2631 * of the command, so we can do this union trick. 2632 */ 2633 u.cmd.common.key_flags = key_flags; 2634 u.cmd.common.key_offset = keyconf->hw_key_idx; 2635 u.cmd.common.sta_id = sta_id; 2636 2637 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2638 2639 status = ADD_STA_SUCCESS; 2640 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2641 &status); 2642 2643 switch (status) { 2644 case ADD_STA_SUCCESS: 2645 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2646 break; 2647 default: 2648 ret = -EIO; 2649 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2650 break; 2651 } 2652 2653 return ret; 2654 } 2655 2656 /* 2657 * Send the FW a request to remove the station from it's internal data 2658 * structures, and in addition remove it from the local data structure. 2659 */ 2660 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2661 { 2662 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2663 int ret; 2664 2665 lockdep_assert_held(&mvm->mutex); 2666 2667 iwl_mvm_flush_sta(mvm, &mvmvif->deflink.mcast_sta, true); 2668 2669 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id, 2670 &mvmvif->deflink.cab_queue, 0); 2671 2672 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id); 2673 if (ret) 2674 IWL_WARN(mvm, "Failed sending remove station\n"); 2675 2676 return ret; 2677 } 2678 2679 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2680 { 2681 struct iwl_mvm_delba_data notif = { 2682 .baid = baid, 2683 }; 2684 2685 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true, 2686 ¬if, sizeof(notif)); 2687 }; 2688 2689 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2690 struct iwl_mvm_baid_data *data) 2691 { 2692 int i; 2693 2694 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2695 2696 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2697 int j; 2698 struct iwl_mvm_reorder_buffer *reorder_buf = 2699 &data->reorder_buf[i]; 2700 struct iwl_mvm_reorder_buf_entry *entries = 2701 &data->entries[i * data->entries_per_queue]; 2702 2703 spin_lock_bh(&reorder_buf->lock); 2704 if (likely(!reorder_buf->num_stored)) { 2705 spin_unlock_bh(&reorder_buf->lock); 2706 continue; 2707 } 2708 2709 /* 2710 * This shouldn't happen in regular DELBA since the internal 2711 * delBA notification should trigger a release of all frames in 2712 * the reorder buffer. 2713 */ 2714 WARN_ON(1); 2715 2716 for (j = 0; j < reorder_buf->buf_size; j++) 2717 __skb_queue_purge(&entries[j].e.frames); 2718 /* 2719 * Prevent timer re-arm. This prevents a very far fetched case 2720 * where we timed out on the notification. There may be prior 2721 * RX frames pending in the RX queue before the notification 2722 * that might get processed between now and the actual deletion 2723 * and we would re-arm the timer although we are deleting the 2724 * reorder buffer. 2725 */ 2726 reorder_buf->removed = true; 2727 spin_unlock_bh(&reorder_buf->lock); 2728 del_timer_sync(&reorder_buf->reorder_timer); 2729 } 2730 } 2731 2732 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2733 struct iwl_mvm_baid_data *data, 2734 u16 ssn, u16 buf_size) 2735 { 2736 int i; 2737 2738 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2739 struct iwl_mvm_reorder_buffer *reorder_buf = 2740 &data->reorder_buf[i]; 2741 struct iwl_mvm_reorder_buf_entry *entries = 2742 &data->entries[i * data->entries_per_queue]; 2743 int j; 2744 2745 reorder_buf->num_stored = 0; 2746 reorder_buf->head_sn = ssn; 2747 reorder_buf->buf_size = buf_size; 2748 /* rx reorder timer */ 2749 timer_setup(&reorder_buf->reorder_timer, 2750 iwl_mvm_reorder_timer_expired, 0); 2751 spin_lock_init(&reorder_buf->lock); 2752 reorder_buf->mvm = mvm; 2753 reorder_buf->queue = i; 2754 reorder_buf->valid = false; 2755 for (j = 0; j < reorder_buf->buf_size; j++) 2756 __skb_queue_head_init(&entries[j].e.frames); 2757 } 2758 } 2759 2760 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm, 2761 struct ieee80211_sta *sta, 2762 bool start, int tid, u16 ssn, 2763 u16 buf_size) 2764 { 2765 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2766 struct iwl_mvm_add_sta_cmd cmd = { 2767 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 2768 .sta_id = mvm_sta->deflink.sta_id, 2769 .add_modify = STA_MODE_MODIFY, 2770 }; 2771 u32 status; 2772 int ret; 2773 2774 if (start) { 2775 cmd.add_immediate_ba_tid = tid; 2776 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2777 cmd.rx_ba_window = cpu_to_le16(buf_size); 2778 cmd.modify_mask = STA_MODIFY_ADD_BA_TID; 2779 } else { 2780 cmd.remove_immediate_ba_tid = tid; 2781 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID; 2782 } 2783 2784 status = ADD_STA_SUCCESS; 2785 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2786 iwl_mvm_add_sta_cmd_size(mvm), 2787 &cmd, &status); 2788 if (ret) 2789 return ret; 2790 2791 switch (status & IWL_ADD_STA_STATUS_MASK) { 2792 case ADD_STA_SUCCESS: 2793 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2794 start ? "start" : "stopp"); 2795 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) && 2796 !(status & IWL_ADD_STA_BAID_VALID_MASK))) 2797 return -EINVAL; 2798 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK); 2799 case ADD_STA_IMMEDIATE_BA_FAILURE: 2800 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2801 return -ENOSPC; 2802 default: 2803 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2804 start ? "start" : "stopp", status); 2805 return -EIO; 2806 } 2807 } 2808 2809 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm, 2810 struct ieee80211_sta *sta, 2811 bool start, int tid, u16 ssn, 2812 u16 buf_size, int baid) 2813 { 2814 struct iwl_rx_baid_cfg_cmd cmd = { 2815 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) : 2816 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE), 2817 }; 2818 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD); 2819 int ret; 2820 2821 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid)); 2822 2823 if (start) { 2824 cmd.alloc.sta_id_mask = 2825 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1)); 2826 cmd.alloc.tid = tid; 2827 cmd.alloc.ssn = cpu_to_le16(ssn); 2828 cmd.alloc.win_size = cpu_to_le16(buf_size); 2829 baid = -EIO; 2830 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 1) == 1) { 2831 cmd.remove_v1.baid = cpu_to_le32(baid); 2832 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove)); 2833 } else { 2834 cmd.remove.sta_id_mask = 2835 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1)); 2836 cmd.remove.tid = cpu_to_le32(tid); 2837 } 2838 2839 ret = iwl_mvm_send_cmd_pdu_status(mvm, cmd_id, sizeof(cmd), 2840 &cmd, &baid); 2841 if (ret) 2842 return ret; 2843 2844 if (!start) { 2845 /* ignore firmware baid on remove */ 2846 baid = 0; 2847 } 2848 2849 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2850 start ? "start" : "stopp"); 2851 2852 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map)) 2853 return -EINVAL; 2854 2855 return baid; 2856 } 2857 2858 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2859 bool start, int tid, u16 ssn, u16 buf_size, 2860 int baid) 2861 { 2862 if (fw_has_capa(&mvm->fw->ucode_capa, 2863 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT)) 2864 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start, 2865 tid, ssn, buf_size, baid); 2866 2867 return iwl_mvm_fw_baid_op_sta(mvm, sta, start, 2868 tid, ssn, buf_size); 2869 } 2870 2871 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2872 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2873 { 2874 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2875 struct iwl_mvm_baid_data *baid_data = NULL; 2876 int ret, baid; 2877 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID : 2878 IWL_MAX_BAID_OLD; 2879 2880 lockdep_assert_held(&mvm->mutex); 2881 2882 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) { 2883 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2884 return -ENOSPC; 2885 } 2886 2887 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2888 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2889 2890 /* sparse doesn't like the __align() so don't check */ 2891 #ifndef __CHECKER__ 2892 /* 2893 * The division below will be OK if either the cache line size 2894 * can be divided by the entry size (ALIGN will round up) or if 2895 * if the entry size can be divided by the cache line size, in 2896 * which case the ALIGN() will do nothing. 2897 */ 2898 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2899 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2900 #endif 2901 2902 /* 2903 * Upward align the reorder buffer size to fill an entire cache 2904 * line for each queue, to avoid sharing cache lines between 2905 * different queues. 2906 */ 2907 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2908 2909 /* 2910 * Allocate here so if allocation fails we can bail out early 2911 * before starting the BA session in the firmware 2912 */ 2913 baid_data = kzalloc(sizeof(*baid_data) + 2914 mvm->trans->num_rx_queues * 2915 reorder_buf_size, 2916 GFP_KERNEL); 2917 if (!baid_data) 2918 return -ENOMEM; 2919 2920 /* 2921 * This division is why we need the above BUILD_BUG_ON(), 2922 * if that doesn't hold then this will not be right. 2923 */ 2924 baid_data->entries_per_queue = 2925 reorder_buf_size / sizeof(baid_data->entries[0]); 2926 } 2927 2928 if (iwl_mvm_has_new_rx_api(mvm) && !start) { 2929 baid = mvm_sta->tid_to_baid[tid]; 2930 } else { 2931 /* we don't really need it in this case */ 2932 baid = -1; 2933 } 2934 2935 /* Don't send command to remove (start=0) BAID during restart */ 2936 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 2937 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size, 2938 baid); 2939 2940 if (baid < 0) { 2941 ret = baid; 2942 goto out_free; 2943 } 2944 2945 if (start) { 2946 mvm->rx_ba_sessions++; 2947 2948 if (!iwl_mvm_has_new_rx_api(mvm)) 2949 return 0; 2950 2951 baid_data->baid = baid; 2952 baid_data->timeout = timeout; 2953 baid_data->last_rx = jiffies; 2954 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2955 timer_setup(&baid_data->session_timer, 2956 iwl_mvm_rx_agg_session_expired, 0); 2957 baid_data->mvm = mvm; 2958 baid_data->tid = tid; 2959 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1); 2960 2961 mvm_sta->tid_to_baid[tid] = baid; 2962 if (timeout) 2963 mod_timer(&baid_data->session_timer, 2964 TU_TO_EXP_TIME(timeout * 2)); 2965 2966 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2967 /* 2968 * protect the BA data with RCU to cover a case where our 2969 * internal RX sync mechanism will timeout (not that it's 2970 * supposed to happen) and we will free the session data while 2971 * RX is being processed in parallel 2972 */ 2973 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2974 mvm_sta->deflink.sta_id, tid, baid); 2975 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2976 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2977 } else { 2978 baid = mvm_sta->tid_to_baid[tid]; 2979 2980 if (mvm->rx_ba_sessions > 0) 2981 /* check that restart flow didn't zero the counter */ 2982 mvm->rx_ba_sessions--; 2983 if (!iwl_mvm_has_new_rx_api(mvm)) 2984 return 0; 2985 2986 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2987 return -EINVAL; 2988 2989 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2990 if (WARN_ON(!baid_data)) 2991 return -EINVAL; 2992 2993 /* synchronize all rx queues so we can safely delete */ 2994 iwl_mvm_free_reorder(mvm, baid_data); 2995 timer_shutdown_sync(&baid_data->session_timer); 2996 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2997 kfree_rcu(baid_data, rcu_head); 2998 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2999 3000 /* 3001 * After we've deleted it, do another queue sync 3002 * so if an IWL_MVM_RXQ_NSSN_SYNC was concurrently 3003 * running it won't find a new session in the old 3004 * BAID. It can find the NULL pointer for the BAID, 3005 * but we must not have it find a different session. 3006 */ 3007 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_EMPTY, 3008 true, NULL, 0); 3009 } 3010 return 0; 3011 3012 out_free: 3013 kfree(baid_data); 3014 return ret; 3015 } 3016 3017 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 3018 int tid, u8 queue, bool start) 3019 { 3020 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3021 struct iwl_mvm_add_sta_cmd cmd = {}; 3022 int ret; 3023 u32 status; 3024 3025 lockdep_assert_held(&mvm->mutex); 3026 3027 if (start) { 3028 mvm_sta->tfd_queue_msk |= BIT(queue); 3029 mvm_sta->tid_disable_agg &= ~BIT(tid); 3030 } else { 3031 /* In DQA-mode the queue isn't removed on agg termination */ 3032 mvm_sta->tid_disable_agg |= BIT(tid); 3033 } 3034 3035 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 3036 cmd.sta_id = mvm_sta->deflink.sta_id; 3037 cmd.add_modify = STA_MODE_MODIFY; 3038 if (!iwl_mvm_has_new_tx_api(mvm)) 3039 cmd.modify_mask = STA_MODIFY_QUEUES; 3040 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 3041 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 3042 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 3043 3044 status = ADD_STA_SUCCESS; 3045 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 3046 iwl_mvm_add_sta_cmd_size(mvm), 3047 &cmd, &status); 3048 if (ret) 3049 return ret; 3050 3051 switch (status & IWL_ADD_STA_STATUS_MASK) { 3052 case ADD_STA_SUCCESS: 3053 break; 3054 default: 3055 ret = -EIO; 3056 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 3057 start ? "start" : "stopp", status); 3058 break; 3059 } 3060 3061 return ret; 3062 } 3063 3064 const u8 tid_to_mac80211_ac[] = { 3065 IEEE80211_AC_BE, 3066 IEEE80211_AC_BK, 3067 IEEE80211_AC_BK, 3068 IEEE80211_AC_BE, 3069 IEEE80211_AC_VI, 3070 IEEE80211_AC_VI, 3071 IEEE80211_AC_VO, 3072 IEEE80211_AC_VO, 3073 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 3074 }; 3075 3076 static const u8 tid_to_ucode_ac[] = { 3077 AC_BE, 3078 AC_BK, 3079 AC_BK, 3080 AC_BE, 3081 AC_VI, 3082 AC_VI, 3083 AC_VO, 3084 AC_VO, 3085 }; 3086 3087 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3088 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 3089 { 3090 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3091 struct iwl_mvm_tid_data *tid_data; 3092 u16 normalized_ssn; 3093 u16 txq_id; 3094 int ret; 3095 3096 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 3097 return -EINVAL; 3098 3099 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 3100 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 3101 IWL_ERR(mvm, 3102 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 3103 mvmsta->tid_data[tid].state); 3104 return -ENXIO; 3105 } 3106 3107 lockdep_assert_held(&mvm->mutex); 3108 3109 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 3110 iwl_mvm_has_new_tx_api(mvm)) { 3111 u8 ac = tid_to_mac80211_ac[tid]; 3112 3113 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 3114 if (ret) 3115 return ret; 3116 } 3117 3118 spin_lock_bh(&mvmsta->lock); 3119 3120 /* 3121 * Note the possible cases: 3122 * 1. An enabled TXQ - TXQ needs to become agg'ed 3123 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 3124 * it as reserved 3125 */ 3126 txq_id = mvmsta->tid_data[tid].txq_id; 3127 if (txq_id == IWL_MVM_INVALID_QUEUE) { 3128 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 3129 IWL_MVM_DQA_MIN_DATA_QUEUE, 3130 IWL_MVM_DQA_MAX_DATA_QUEUE); 3131 if (ret < 0) { 3132 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 3133 goto out; 3134 } 3135 3136 txq_id = ret; 3137 3138 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 3139 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 3140 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 3141 ret = -ENXIO; 3142 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 3143 tid, IWL_MAX_HW_QUEUES - 1); 3144 goto out; 3145 3146 } else if (unlikely(mvm->queue_info[txq_id].status == 3147 IWL_MVM_QUEUE_SHARED)) { 3148 ret = -ENXIO; 3149 IWL_DEBUG_TX_QUEUES(mvm, 3150 "Can't start tid %d agg on shared queue!\n", 3151 tid); 3152 goto out; 3153 } 3154 3155 IWL_DEBUG_TX_QUEUES(mvm, 3156 "AGG for tid %d will be on queue #%d\n", 3157 tid, txq_id); 3158 3159 tid_data = &mvmsta->tid_data[tid]; 3160 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3161 tid_data->txq_id = txq_id; 3162 *ssn = tid_data->ssn; 3163 3164 IWL_DEBUG_TX_QUEUES(mvm, 3165 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 3166 mvmsta->deflink.sta_id, tid, txq_id, 3167 tid_data->ssn, 3168 tid_data->next_reclaimed); 3169 3170 /* 3171 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3172 * to align the wrap around of ssn so we compare relevant values. 3173 */ 3174 normalized_ssn = tid_data->ssn; 3175 if (mvm->trans->trans_cfg->gen2) 3176 normalized_ssn &= 0xff; 3177 3178 if (normalized_ssn == tid_data->next_reclaimed) { 3179 tid_data->state = IWL_AGG_STARTING; 3180 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 3181 } else { 3182 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 3183 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA; 3184 } 3185 3186 out: 3187 spin_unlock_bh(&mvmsta->lock); 3188 3189 return ret; 3190 } 3191 3192 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3193 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 3194 bool amsdu) 3195 { 3196 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3197 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3198 unsigned int wdg_timeout = 3199 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 3200 int queue, ret; 3201 bool alloc_queue = true; 3202 enum iwl_mvm_queue_status queue_status; 3203 u16 ssn; 3204 3205 struct iwl_trans_txq_scd_cfg cfg = { 3206 .sta_id = mvmsta->deflink.sta_id, 3207 .tid = tid, 3208 .frame_limit = buf_size, 3209 .aggregate = true, 3210 }; 3211 3212 /* 3213 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 3214 * manager, so this function should never be called in this case. 3215 */ 3216 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 3217 return -EINVAL; 3218 3219 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 3220 != IWL_MAX_TID_COUNT); 3221 3222 spin_lock_bh(&mvmsta->lock); 3223 ssn = tid_data->ssn; 3224 queue = tid_data->txq_id; 3225 tid_data->state = IWL_AGG_ON; 3226 mvmsta->agg_tids |= BIT(tid); 3227 tid_data->ssn = 0xffff; 3228 tid_data->amsdu_in_ampdu_allowed = amsdu; 3229 spin_unlock_bh(&mvmsta->lock); 3230 3231 if (iwl_mvm_has_new_tx_api(mvm)) { 3232 /* 3233 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 3234 * would have failed, so if we are here there is no need to 3235 * allocate a queue. 3236 * However, if aggregation size is different than the default 3237 * size, the scheduler should be reconfigured. 3238 * We cannot do this with the new TX API, so return unsupported 3239 * for now, until it will be offloaded to firmware.. 3240 * Note that if SCD default value changes - this condition 3241 * should be updated as well. 3242 */ 3243 if (buf_size < IWL_FRAME_LIMIT) 3244 return -ENOTSUPP; 3245 3246 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3247 if (ret) 3248 return -EIO; 3249 goto out; 3250 } 3251 3252 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 3253 3254 queue_status = mvm->queue_info[queue].status; 3255 3256 /* Maybe there is no need to even alloc a queue... */ 3257 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 3258 alloc_queue = false; 3259 3260 /* 3261 * Only reconfig the SCD for the queue if the window size has 3262 * changed from current (become smaller) 3263 */ 3264 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 3265 /* 3266 * If reconfiguring an existing queue, it first must be 3267 * drained 3268 */ 3269 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 3270 BIT(queue)); 3271 if (ret) { 3272 IWL_ERR(mvm, 3273 "Error draining queue before reconfig\n"); 3274 return ret; 3275 } 3276 3277 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 3278 mvmsta->deflink.sta_id, tid, 3279 buf_size, ssn); 3280 if (ret) { 3281 IWL_ERR(mvm, 3282 "Error reconfiguring TXQ #%d\n", queue); 3283 return ret; 3284 } 3285 } 3286 3287 if (alloc_queue) 3288 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 3289 &cfg, wdg_timeout); 3290 3291 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 3292 if (queue_status != IWL_MVM_QUEUE_SHARED) { 3293 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3294 if (ret) 3295 return -EIO; 3296 } 3297 3298 /* No need to mark as reserved */ 3299 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 3300 3301 out: 3302 /* 3303 * Even though in theory the peer could have different 3304 * aggregation reorder buffer sizes for different sessions, 3305 * our ucode doesn't allow for that and has a global limit 3306 * for each station. Therefore, use the minimum of all the 3307 * aggregation sessions and our default value. 3308 */ 3309 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize = 3310 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize, 3311 buf_size); 3312 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit = 3313 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize; 3314 3315 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 3316 sta->addr, tid); 3317 3318 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq); 3319 } 3320 3321 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3322 struct iwl_mvm_sta *mvmsta, 3323 struct iwl_mvm_tid_data *tid_data) 3324 { 3325 u16 txq_id = tid_data->txq_id; 3326 3327 lockdep_assert_held(&mvm->mutex); 3328 3329 if (iwl_mvm_has_new_tx_api(mvm)) 3330 return; 3331 3332 /* 3333 * The TXQ is marked as reserved only if no traffic came through yet 3334 * This means no traffic has been sent on this TID (agg'd or not), so 3335 * we no longer have use for the queue. Since it hasn't even been 3336 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3337 * free. 3338 */ 3339 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3340 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3341 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3342 } 3343 } 3344 3345 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3346 struct ieee80211_sta *sta, u16 tid) 3347 { 3348 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3349 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3350 u16 txq_id; 3351 int err; 3352 3353 /* 3354 * If mac80211 is cleaning its state, then say that we finished since 3355 * our state has been cleared anyway. 3356 */ 3357 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3358 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3359 return 0; 3360 } 3361 3362 spin_lock_bh(&mvmsta->lock); 3363 3364 txq_id = tid_data->txq_id; 3365 3366 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3367 mvmsta->deflink.sta_id, tid, txq_id, 3368 tid_data->state); 3369 3370 mvmsta->agg_tids &= ~BIT(tid); 3371 3372 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3373 3374 switch (tid_data->state) { 3375 case IWL_AGG_ON: 3376 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3377 3378 IWL_DEBUG_TX_QUEUES(mvm, 3379 "ssn = %d, next_recl = %d\n", 3380 tid_data->ssn, tid_data->next_reclaimed); 3381 3382 tid_data->ssn = 0xffff; 3383 tid_data->state = IWL_AGG_OFF; 3384 spin_unlock_bh(&mvmsta->lock); 3385 3386 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3387 3388 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3389 return 0; 3390 case IWL_AGG_STARTING: 3391 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3392 /* 3393 * The agg session has been stopped before it was set up. This 3394 * can happen when the AddBA timer times out for example. 3395 */ 3396 3397 /* No barriers since we are under mutex */ 3398 lockdep_assert_held(&mvm->mutex); 3399 3400 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3401 tid_data->state = IWL_AGG_OFF; 3402 err = 0; 3403 break; 3404 default: 3405 IWL_ERR(mvm, 3406 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3407 mvmsta->deflink.sta_id, tid, tid_data->state); 3408 IWL_ERR(mvm, 3409 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3410 err = -EINVAL; 3411 } 3412 3413 spin_unlock_bh(&mvmsta->lock); 3414 3415 return err; 3416 } 3417 3418 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3419 struct ieee80211_sta *sta, u16 tid) 3420 { 3421 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3422 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3423 u16 txq_id; 3424 enum iwl_mvm_agg_state old_state; 3425 3426 /* 3427 * First set the agg state to OFF to avoid calling 3428 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3429 */ 3430 spin_lock_bh(&mvmsta->lock); 3431 txq_id = tid_data->txq_id; 3432 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3433 mvmsta->deflink.sta_id, tid, txq_id, 3434 tid_data->state); 3435 old_state = tid_data->state; 3436 tid_data->state = IWL_AGG_OFF; 3437 mvmsta->agg_tids &= ~BIT(tid); 3438 spin_unlock_bh(&mvmsta->lock); 3439 3440 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3441 3442 if (old_state >= IWL_AGG_ON) { 3443 iwl_mvm_drain_sta(mvm, mvmsta, true); 3444 3445 if (iwl_mvm_has_new_tx_api(mvm)) { 3446 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id, 3447 BIT(tid))) 3448 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3449 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3450 } else { 3451 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id))) 3452 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3453 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3454 } 3455 3456 iwl_mvm_drain_sta(mvm, mvmsta, false); 3457 3458 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3459 } 3460 3461 return 0; 3462 } 3463 3464 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3465 { 3466 int i, max = -1, max_offs = -1; 3467 3468 lockdep_assert_held(&mvm->mutex); 3469 3470 /* Pick the unused key offset with the highest 'deleted' 3471 * counter. Every time a key is deleted, all the counters 3472 * are incremented and the one that was just deleted is 3473 * reset to zero. Thus, the highest counter is the one 3474 * that was deleted longest ago. Pick that one. 3475 */ 3476 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3477 if (test_bit(i, mvm->fw_key_table)) 3478 continue; 3479 if (mvm->fw_key_deleted[i] > max) { 3480 max = mvm->fw_key_deleted[i]; 3481 max_offs = i; 3482 } 3483 } 3484 3485 if (max_offs < 0) 3486 return STA_KEY_IDX_INVALID; 3487 3488 return max_offs; 3489 } 3490 3491 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3492 struct ieee80211_vif *vif, 3493 struct ieee80211_sta *sta) 3494 { 3495 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3496 3497 if (sta) 3498 return iwl_mvm_sta_from_mac80211(sta); 3499 3500 /* 3501 * The device expects GTKs for station interfaces to be 3502 * installed as GTKs for the AP station. If we have no 3503 * station ID, then use AP's station ID. 3504 */ 3505 if (vif->type == NL80211_IFTYPE_STATION && 3506 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) { 3507 u8 sta_id = mvmvif->deflink.ap_sta_id; 3508 3509 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3510 lockdep_is_held(&mvm->mutex)); 3511 3512 /* 3513 * It is possible that the 'sta' parameter is NULL, 3514 * for example when a GTK is removed - the sta_id will then 3515 * be the AP ID, and no station was passed by mac80211. 3516 */ 3517 if (IS_ERR_OR_NULL(sta)) 3518 return NULL; 3519 3520 return iwl_mvm_sta_from_mac80211(sta); 3521 } 3522 3523 return NULL; 3524 } 3525 3526 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len) 3527 { 3528 int i; 3529 3530 for (i = len - 1; i >= 0; i--) { 3531 if (pn1[i] > pn2[i]) 3532 return 1; 3533 if (pn1[i] < pn2[i]) 3534 return -1; 3535 } 3536 3537 return 0; 3538 } 3539 3540 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3541 u32 sta_id, 3542 struct ieee80211_key_conf *key, bool mcast, 3543 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3544 u8 key_offset, bool mfp) 3545 { 3546 union { 3547 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3548 struct iwl_mvm_add_sta_key_cmd cmd; 3549 } u = {}; 3550 __le16 key_flags; 3551 int ret; 3552 u32 status; 3553 u16 keyidx; 3554 u64 pn = 0; 3555 int i, size; 3556 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3557 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3558 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY, 3559 new_api ? 2 : 1); 3560 3561 if (sta_id == IWL_MVM_INVALID_STA) 3562 return -EINVAL; 3563 3564 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3565 STA_KEY_FLG_KEYID_MSK; 3566 key_flags = cpu_to_le16(keyidx); 3567 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3568 3569 switch (key->cipher) { 3570 case WLAN_CIPHER_SUITE_TKIP: 3571 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3572 if (api_ver >= 2) { 3573 memcpy((void *)&u.cmd.tx_mic_key, 3574 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3575 IWL_MIC_KEY_SIZE); 3576 3577 memcpy((void *)&u.cmd.rx_mic_key, 3578 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3579 IWL_MIC_KEY_SIZE); 3580 pn = atomic64_read(&key->tx_pn); 3581 3582 } else { 3583 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3584 for (i = 0; i < 5; i++) 3585 u.cmd_v1.tkip_rx_ttak[i] = 3586 cpu_to_le16(tkip_p1k[i]); 3587 } 3588 memcpy(u.cmd.common.key, key->key, key->keylen); 3589 break; 3590 case WLAN_CIPHER_SUITE_CCMP: 3591 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3592 memcpy(u.cmd.common.key, key->key, key->keylen); 3593 if (api_ver >= 2) 3594 pn = atomic64_read(&key->tx_pn); 3595 break; 3596 case WLAN_CIPHER_SUITE_WEP104: 3597 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3598 fallthrough; 3599 case WLAN_CIPHER_SUITE_WEP40: 3600 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3601 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3602 break; 3603 case WLAN_CIPHER_SUITE_GCMP_256: 3604 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3605 fallthrough; 3606 case WLAN_CIPHER_SUITE_GCMP: 3607 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3608 memcpy(u.cmd.common.key, key->key, key->keylen); 3609 if (api_ver >= 2) 3610 pn = atomic64_read(&key->tx_pn); 3611 break; 3612 default: 3613 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3614 memcpy(u.cmd.common.key, key->key, key->keylen); 3615 } 3616 3617 if (mcast) 3618 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3619 if (mfp) 3620 key_flags |= cpu_to_le16(STA_KEY_MFP); 3621 3622 u.cmd.common.key_offset = key_offset; 3623 u.cmd.common.key_flags = key_flags; 3624 u.cmd.common.sta_id = sta_id; 3625 3626 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) 3627 i = 0; 3628 else 3629 i = -1; 3630 3631 for (; i < IEEE80211_NUM_TIDS; i++) { 3632 struct ieee80211_key_seq seq = {}; 3633 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn; 3634 int rx_pn_len = 8; 3635 /* there's a hole at 2/3 in FW format depending on version */ 3636 int hole = api_ver >= 3 ? 0 : 2; 3637 3638 ieee80211_get_key_rx_seq(key, i, &seq); 3639 3640 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { 3641 rx_pn[0] = seq.tkip.iv16; 3642 rx_pn[1] = seq.tkip.iv16 >> 8; 3643 rx_pn[2 + hole] = seq.tkip.iv32; 3644 rx_pn[3 + hole] = seq.tkip.iv32 >> 8; 3645 rx_pn[4 + hole] = seq.tkip.iv32 >> 16; 3646 rx_pn[5 + hole] = seq.tkip.iv32 >> 24; 3647 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) { 3648 rx_pn = seq.hw.seq; 3649 rx_pn_len = seq.hw.seq_len; 3650 } else { 3651 rx_pn[0] = seq.ccmp.pn[0]; 3652 rx_pn[1] = seq.ccmp.pn[1]; 3653 rx_pn[2 + hole] = seq.ccmp.pn[2]; 3654 rx_pn[3 + hole] = seq.ccmp.pn[3]; 3655 rx_pn[4 + hole] = seq.ccmp.pn[4]; 3656 rx_pn[5 + hole] = seq.ccmp.pn[5]; 3657 } 3658 3659 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt, 3660 rx_pn_len) > 0) 3661 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn, 3662 rx_pn_len); 3663 } 3664 3665 if (api_ver >= 2) { 3666 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3667 size = sizeof(u.cmd); 3668 } else { 3669 size = sizeof(u.cmd_v1); 3670 } 3671 3672 status = ADD_STA_SUCCESS; 3673 if (cmd_flags & CMD_ASYNC) 3674 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3675 &u.cmd); 3676 else 3677 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3678 &u.cmd, &status); 3679 3680 switch (status) { 3681 case ADD_STA_SUCCESS: 3682 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3683 break; 3684 default: 3685 ret = -EIO; 3686 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3687 break; 3688 } 3689 3690 return ret; 3691 } 3692 3693 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3694 struct ieee80211_key_conf *keyconf, 3695 u8 sta_id, bool remove_key) 3696 { 3697 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3698 3699 /* verify the key details match the required command's expectations */ 3700 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3701 (keyconf->keyidx != 4 && keyconf->keyidx != 5 && 3702 keyconf->keyidx != 6 && keyconf->keyidx != 7) || 3703 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3704 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3705 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3706 return -EINVAL; 3707 3708 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3709 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3710 return -EINVAL; 3711 3712 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3713 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3714 3715 if (remove_key) { 3716 /* This is a valid situation for IGTK */ 3717 if (sta_id == IWL_MVM_INVALID_STA) 3718 return 0; 3719 3720 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3721 } else { 3722 struct ieee80211_key_seq seq; 3723 const u8 *pn; 3724 3725 switch (keyconf->cipher) { 3726 case WLAN_CIPHER_SUITE_AES_CMAC: 3727 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3728 break; 3729 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3730 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3731 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3732 break; 3733 default: 3734 return -EINVAL; 3735 } 3736 3737 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3738 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3739 igtk_cmd.ctrl_flags |= 3740 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3741 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3742 pn = seq.aes_cmac.pn; 3743 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3744 ((u64) pn[4] << 8) | 3745 ((u64) pn[3] << 16) | 3746 ((u64) pn[2] << 24) | 3747 ((u64) pn[1] << 32) | 3748 ((u64) pn[0] << 40)); 3749 } 3750 3751 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n", 3752 remove_key ? "removing" : "installing", 3753 keyconf->keyidx >= 6 ? "B" : "", 3754 keyconf->keyidx, igtk_cmd.sta_id); 3755 3756 if (!iwl_mvm_has_new_rx_api(mvm)) { 3757 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3758 .ctrl_flags = igtk_cmd.ctrl_flags, 3759 .key_id = igtk_cmd.key_id, 3760 .sta_id = igtk_cmd.sta_id, 3761 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3762 }; 3763 3764 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3765 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3766 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3767 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3768 } 3769 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3770 sizeof(igtk_cmd), &igtk_cmd); 3771 } 3772 3773 3774 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3775 struct ieee80211_vif *vif, 3776 struct ieee80211_sta *sta) 3777 { 3778 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3779 3780 if (sta) 3781 return sta->addr; 3782 3783 if (vif->type == NL80211_IFTYPE_STATION && 3784 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) { 3785 u8 sta_id = mvmvif->deflink.ap_sta_id; 3786 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3787 lockdep_is_held(&mvm->mutex)); 3788 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 3789 return NULL; 3790 3791 return sta->addr; 3792 } 3793 3794 3795 return NULL; 3796 } 3797 3798 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3799 struct ieee80211_vif *vif, 3800 struct ieee80211_sta *sta, 3801 struct ieee80211_key_conf *keyconf, 3802 u8 key_offset, 3803 bool mcast) 3804 { 3805 const u8 *addr; 3806 struct ieee80211_key_seq seq; 3807 u16 p1k[5]; 3808 u32 sta_id; 3809 bool mfp = false; 3810 3811 if (sta) { 3812 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3813 3814 sta_id = mvm_sta->deflink.sta_id; 3815 mfp = sta->mfp; 3816 } else if (vif->type == NL80211_IFTYPE_AP && 3817 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3818 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3819 3820 sta_id = mvmvif->deflink.mcast_sta.sta_id; 3821 } else { 3822 IWL_ERR(mvm, "Failed to find station id\n"); 3823 return -EINVAL; 3824 } 3825 3826 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) { 3827 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3828 if (!addr) { 3829 IWL_ERR(mvm, "Failed to find mac address\n"); 3830 return -EINVAL; 3831 } 3832 3833 /* get phase 1 key from mac80211 */ 3834 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3835 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3836 3837 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3838 seq.tkip.iv32, p1k, 0, key_offset, 3839 mfp); 3840 } 3841 3842 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3843 0, NULL, 0, key_offset, mfp); 3844 } 3845 3846 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3847 struct ieee80211_vif *vif, 3848 struct ieee80211_sta *sta, 3849 struct ieee80211_key_conf *keyconf, 3850 u8 key_offset) 3851 { 3852 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3853 struct iwl_mvm_sta *mvm_sta; 3854 u8 sta_id = IWL_MVM_INVALID_STA; 3855 int ret; 3856 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3857 3858 lockdep_assert_held(&mvm->mutex); 3859 3860 if (vif->type != NL80211_IFTYPE_AP || 3861 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3862 /* Get the station id from the mvm local station table */ 3863 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3864 if (!mvm_sta) { 3865 IWL_ERR(mvm, "Failed to find station\n"); 3866 return -EINVAL; 3867 } 3868 sta_id = mvm_sta->deflink.sta_id; 3869 3870 /* 3871 * It is possible that the 'sta' parameter is NULL, and thus 3872 * there is a need to retrieve the sta from the local station 3873 * table. 3874 */ 3875 if (!sta) { 3876 sta = rcu_dereference_protected( 3877 mvm->fw_id_to_mac_id[sta_id], 3878 lockdep_is_held(&mvm->mutex)); 3879 if (IS_ERR_OR_NULL(sta)) { 3880 IWL_ERR(mvm, "Invalid station id\n"); 3881 return -EINVAL; 3882 } 3883 } 3884 3885 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3886 return -EINVAL; 3887 } else { 3888 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3889 3890 sta_id = mvmvif->deflink.mcast_sta.sta_id; 3891 } 3892 3893 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3894 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3895 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3896 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3897 goto end; 3898 } 3899 3900 /* If the key_offset is not pre-assigned, we need to find a 3901 * new offset to use. In normal cases, the offset is not 3902 * pre-assigned, but during HW_RESTART we want to reuse the 3903 * same indices, so we pass them when this function is called. 3904 * 3905 * In D3 entry, we need to hardcoded the indices (because the 3906 * firmware hardcodes the PTK offset to 0). In this case, we 3907 * need to make sure we don't overwrite the hw_key_idx in the 3908 * keyconf structure, because otherwise we cannot configure 3909 * the original ones back when resuming. 3910 */ 3911 if (key_offset == STA_KEY_IDX_INVALID) { 3912 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3913 if (key_offset == STA_KEY_IDX_INVALID) 3914 return -ENOSPC; 3915 keyconf->hw_key_idx = key_offset; 3916 } 3917 3918 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3919 if (ret) 3920 goto end; 3921 3922 /* 3923 * For WEP, the same key is used for multicast and unicast. Upload it 3924 * again, using the same key offset, and now pointing the other one 3925 * to the same key slot (offset). 3926 * If this fails, remove the original as well. 3927 */ 3928 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3929 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3930 sta) { 3931 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3932 key_offset, !mcast); 3933 if (ret) { 3934 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3935 goto end; 3936 } 3937 } 3938 3939 __set_bit(key_offset, mvm->fw_key_table); 3940 3941 end: 3942 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3943 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3944 sta ? sta->addr : zero_addr, ret); 3945 return ret; 3946 } 3947 3948 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3949 struct ieee80211_vif *vif, 3950 struct ieee80211_sta *sta, 3951 struct ieee80211_key_conf *keyconf) 3952 { 3953 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3954 struct iwl_mvm_sta *mvm_sta; 3955 u8 sta_id = IWL_MVM_INVALID_STA; 3956 int ret, i; 3957 3958 lockdep_assert_held(&mvm->mutex); 3959 3960 /* Get the station from the mvm local station table */ 3961 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3962 if (mvm_sta) 3963 sta_id = mvm_sta->deflink.sta_id; 3964 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3965 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id; 3966 3967 3968 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3969 keyconf->keyidx, sta_id); 3970 3971 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3972 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3973 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3974 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3975 3976 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3977 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3978 keyconf->hw_key_idx); 3979 return -ENOENT; 3980 } 3981 3982 /* track which key was deleted last */ 3983 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3984 if (mvm->fw_key_deleted[i] < U8_MAX) 3985 mvm->fw_key_deleted[i]++; 3986 } 3987 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3988 3989 if (sta && !mvm_sta) { 3990 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3991 return 0; 3992 } 3993 3994 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3995 if (ret) 3996 return ret; 3997 3998 /* delete WEP key twice to get rid of (now useless) offset */ 3999 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 4000 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 4001 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 4002 4003 return ret; 4004 } 4005 4006 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 4007 struct ieee80211_vif *vif, 4008 struct ieee80211_key_conf *keyconf, 4009 struct ieee80211_sta *sta, u32 iv32, 4010 u16 *phase1key) 4011 { 4012 struct iwl_mvm_sta *mvm_sta; 4013 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 4014 bool mfp = sta ? sta->mfp : false; 4015 4016 rcu_read_lock(); 4017 4018 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 4019 if (WARN_ON_ONCE(!mvm_sta)) 4020 goto unlock; 4021 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast, 4022 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 4023 mfp); 4024 4025 unlock: 4026 rcu_read_unlock(); 4027 } 4028 4029 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 4030 struct ieee80211_sta *sta) 4031 { 4032 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 4033 struct iwl_mvm_add_sta_cmd cmd = { 4034 .add_modify = STA_MODE_MODIFY, 4035 .sta_id = mvmsta->deflink.sta_id, 4036 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 4037 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4038 }; 4039 int ret; 4040 4041 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4042 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4043 if (ret) 4044 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4045 } 4046 4047 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 4048 struct ieee80211_sta *sta, 4049 enum ieee80211_frame_release_type reason, 4050 u16 cnt, u16 tids, bool more_data, 4051 bool single_sta_queue) 4052 { 4053 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 4054 struct iwl_mvm_add_sta_cmd cmd = { 4055 .add_modify = STA_MODE_MODIFY, 4056 .sta_id = mvmsta->deflink.sta_id, 4057 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 4058 .sleep_tx_count = cpu_to_le16(cnt), 4059 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4060 }; 4061 int tid, ret; 4062 unsigned long _tids = tids; 4063 4064 /* convert TIDs to ACs - we don't support TSPEC so that's OK 4065 * Note that this field is reserved and unused by firmware not 4066 * supporting GO uAPSD, so it's safe to always do this. 4067 */ 4068 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 4069 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 4070 4071 /* If we're releasing frames from aggregation or dqa queues then check 4072 * if all the queues that we're releasing frames from, combined, have: 4073 * - more frames than the service period, in which case more_data 4074 * needs to be set 4075 * - fewer than 'cnt' frames, in which case we need to adjust the 4076 * firmware command (but do that unconditionally) 4077 */ 4078 if (single_sta_queue) { 4079 int remaining = cnt; 4080 int sleep_tx_count; 4081 4082 spin_lock_bh(&mvmsta->lock); 4083 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 4084 struct iwl_mvm_tid_data *tid_data; 4085 u16 n_queued; 4086 4087 tid_data = &mvmsta->tid_data[tid]; 4088 4089 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 4090 if (n_queued > remaining) { 4091 more_data = true; 4092 remaining = 0; 4093 break; 4094 } 4095 remaining -= n_queued; 4096 } 4097 sleep_tx_count = cnt - remaining; 4098 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 4099 mvmsta->sleep_tx_count = sleep_tx_count; 4100 spin_unlock_bh(&mvmsta->lock); 4101 4102 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 4103 if (WARN_ON(cnt - remaining == 0)) { 4104 ieee80211_sta_eosp(sta); 4105 return; 4106 } 4107 } 4108 4109 /* Note: this is ignored by firmware not supporting GO uAPSD */ 4110 if (more_data) 4111 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 4112 4113 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 4114 mvmsta->next_status_eosp = true; 4115 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 4116 } else { 4117 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 4118 } 4119 4120 /* block the Tx queues until the FW updated the sleep Tx count */ 4121 iwl_trans_block_txq_ptrs(mvm->trans, true); 4122 4123 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 4124 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 4125 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4126 if (ret) 4127 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4128 } 4129 4130 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 4131 struct iwl_rx_cmd_buffer *rxb) 4132 { 4133 struct iwl_rx_packet *pkt = rxb_addr(rxb); 4134 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 4135 struct ieee80211_sta *sta; 4136 u32 sta_id = le32_to_cpu(notif->sta_id); 4137 4138 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations)) 4139 return; 4140 4141 rcu_read_lock(); 4142 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 4143 if (!IS_ERR_OR_NULL(sta)) 4144 ieee80211_sta_eosp(sta); 4145 rcu_read_unlock(); 4146 } 4147 4148 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 4149 struct iwl_mvm_sta *mvmsta, 4150 bool disable) 4151 { 4152 struct iwl_mvm_add_sta_cmd cmd = { 4153 .add_modify = STA_MODE_MODIFY, 4154 .sta_id = mvmsta->deflink.sta_id, 4155 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 4156 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 4157 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4158 }; 4159 int ret; 4160 4161 if (mvm->mld_api_is_used) { 4162 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable); 4163 return; 4164 } 4165 4166 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4167 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4168 if (ret) 4169 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4170 } 4171 4172 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 4173 struct ieee80211_sta *sta, 4174 bool disable) 4175 { 4176 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 4177 4178 if (mvm->mld_api_is_used) { 4179 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable); 4180 return; 4181 } 4182 4183 spin_lock_bh(&mvm_sta->lock); 4184 4185 if (mvm_sta->disable_tx == disable) { 4186 spin_unlock_bh(&mvm_sta->lock); 4187 return; 4188 } 4189 4190 mvm_sta->disable_tx = disable; 4191 4192 /* 4193 * If sta PS state is handled by mac80211, tell it to start/stop 4194 * queuing tx for this station. 4195 */ 4196 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS)) 4197 ieee80211_sta_block_awake(mvm->hw, sta, disable); 4198 4199 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 4200 4201 spin_unlock_bh(&mvm_sta->lock); 4202 } 4203 4204 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 4205 struct iwl_mvm_vif *mvmvif, 4206 struct iwl_mvm_int_sta *sta, 4207 bool disable) 4208 { 4209 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 4210 struct iwl_mvm_add_sta_cmd cmd = { 4211 .add_modify = STA_MODE_MODIFY, 4212 .sta_id = sta->sta_id, 4213 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 4214 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 4215 .mac_id_n_color = cpu_to_le32(id), 4216 }; 4217 int ret; 4218 4219 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4220 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4221 if (ret) 4222 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4223 } 4224 4225 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 4226 struct iwl_mvm_vif *mvmvif, 4227 bool disable) 4228 { 4229 struct ieee80211_sta *sta; 4230 struct iwl_mvm_sta *mvm_sta; 4231 int i; 4232 4233 if (mvm->mld_api_is_used) { 4234 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif, disable); 4235 return; 4236 } 4237 4238 rcu_read_lock(); 4239 4240 /* Block/unblock all the stations of the given mvmvif */ 4241 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { 4242 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]); 4243 if (IS_ERR_OR_NULL(sta)) 4244 continue; 4245 4246 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 4247 if (mvm_sta->mac_id_n_color != 4248 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 4249 continue; 4250 4251 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 4252 } 4253 4254 rcu_read_unlock(); 4255 4256 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 4257 return; 4258 4259 /* Need to block/unblock also multicast station */ 4260 if (mvmvif->deflink.mcast_sta.sta_id != IWL_MVM_INVALID_STA) 4261 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 4262 &mvmvif->deflink.mcast_sta, 4263 disable); 4264 4265 /* 4266 * Only unblock the broadcast station (FW blocks it for immediate 4267 * quiet, not the driver) 4268 */ 4269 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_MVM_INVALID_STA) 4270 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 4271 &mvmvif->deflink.bcast_sta, 4272 disable); 4273 } 4274 4275 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 4276 { 4277 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 4278 struct iwl_mvm_sta *mvmsta; 4279 4280 rcu_read_lock(); 4281 4282 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id); 4283 4284 if (mvmsta) 4285 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 4286 4287 rcu_read_unlock(); 4288 } 4289 4290 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 4291 { 4292 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 4293 4294 /* 4295 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 4296 * to align the wrap around of ssn so we compare relevant values. 4297 */ 4298 if (mvm->trans->trans_cfg->gen2) 4299 sn &= 0xff; 4300 4301 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 4302 } 4303 4304 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 4305 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher, 4306 u8 *key, u32 key_len) 4307 { 4308 int ret; 4309 u16 queue; 4310 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 4311 struct ieee80211_key_conf *keyconf; 4312 unsigned int wdg_timeout = 4313 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 4314 bool mld = iwl_mvm_has_mld_api(mvm->fw); 4315 u32 type = mld ? STATION_TYPE_PEER : IWL_STA_LINK; 4316 4317 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0, 4318 NL80211_IFTYPE_UNSPECIFIED, type); 4319 if (ret) 4320 return ret; 4321 4322 if (mld) 4323 ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, sta, addr, 4324 mvmvif->deflink.fw_link_id, 4325 &queue, 4326 IWL_MAX_TID_COUNT, 4327 &wdg_timeout); 4328 else 4329 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, 4330 mvmvif->color, addr, sta, 4331 &queue, 4332 IWL_MVM_TX_FIFO_BE); 4333 if (ret) 4334 goto out; 4335 4336 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL); 4337 if (!keyconf) { 4338 ret = -ENOBUFS; 4339 goto out; 4340 } 4341 4342 keyconf->cipher = cipher; 4343 memcpy(keyconf->key, key, key_len); 4344 keyconf->keylen = key_len; 4345 keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE; 4346 4347 if (mld) { 4348 /* The MFP flag is set according to the station mfp field. Since 4349 * we don't have a station, set it manually. 4350 */ 4351 u32 key_flags = 4352 iwl_mvm_get_sec_flags(mvm, vif, NULL, keyconf) | 4353 IWL_SEC_KEY_FLAG_MFP; 4354 u32 sta_mask = BIT(sta->sta_id); 4355 4356 ret = iwl_mvm_mld_send_key(mvm, sta_mask, key_flags, keyconf); 4357 } else { 4358 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false, 4359 0, NULL, 0, 0, true); 4360 } 4361 4362 kfree(keyconf); 4363 return 0; 4364 out: 4365 iwl_mvm_dealloc_int_sta(mvm, sta); 4366 return ret; 4367 } 4368 4369 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm, 4370 struct ieee80211_vif *vif, 4371 u32 id) 4372 { 4373 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = { 4374 .id = cpu_to_le32(id), 4375 }; 4376 int ret; 4377 4378 ret = iwl_mvm_send_cmd_pdu(mvm, 4379 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD), 4380 CMD_ASYNC, 4381 sizeof(cancel_channel_switch_cmd), 4382 &cancel_channel_switch_cmd); 4383 if (ret) 4384 IWL_ERR(mvm, "Failed to cancel the channel switch\n"); 4385 } 4386