1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2015, 2018-2026 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_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_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->chanreq.oper.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.chanreq.oper.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 timer_container_of(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->mac_cfg->base->num_of_queues, 795 "max queue %d >= num_of_queues (%d)", maxq, 796 mvm->trans->mac_cfg->base->num_of_queues)) 797 maxq = mvm->trans->mac_cfg->base->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 512 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->mac_cfg->base->min_txq_size); 856 } else { 857 size = iwl_mvm_get_queue_size(sta); 858 } 859 860 if (sta) { 861 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 862 struct ieee80211_link_sta *link_sta; 863 unsigned int link_id; 864 865 rcu_read_lock(); 866 for_each_sta_active_link(mvmsta->vif, sta, link_sta, link_id) { 867 struct iwl_mvm_link_sta *link = 868 rcu_dereference_protected(mvmsta->link[link_id], 869 lockdep_is_held(&mvm->mutex)); 870 871 if (!link) 872 continue; 873 874 sta_mask |= BIT(link->sta_id); 875 } 876 rcu_read_unlock(); 877 } else { 878 sta_mask |= BIT(sta_id); 879 } 880 881 if (!sta_mask) 882 return -EINVAL; 883 884 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask, 885 tid, size, timeout); 886 887 if (queue >= 0) 888 IWL_DEBUG_TX_QUEUES(mvm, 889 "Enabling TXQ #%d for sta mask 0x%x tid %d\n", 890 queue, sta_mask, tid); 891 892 return queue; 893 } 894 895 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 896 struct ieee80211_sta *sta, u8 ac, 897 int tid) 898 { 899 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 900 struct iwl_mvm_txq *mvmtxq = 901 iwl_mvm_txq_from_tid(sta, tid); 902 unsigned int wdg_timeout = 903 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif); 904 int queue = -1; 905 906 lockdep_assert_held(&mvm->mutex); 907 908 IWL_DEBUG_TX_QUEUES(mvm, 909 "Allocating queue for sta %d on tid %d\n", 910 mvmsta->deflink.sta_id, tid); 911 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id, 912 tid, wdg_timeout); 913 if (queue < 0) 914 return queue; 915 916 mvmtxq->txq_id = queue; 917 mvm->tvqm_info[queue].txq_tid = tid; 918 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id; 919 920 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 921 922 spin_lock_bh(&mvmsta->lock); 923 mvmsta->tid_data[tid].txq_id = queue; 924 spin_unlock_bh(&mvmsta->lock); 925 926 return 0; 927 } 928 929 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 930 struct ieee80211_sta *sta, 931 int queue, u8 sta_id, u8 tid) 932 { 933 bool enable_queue = true; 934 935 /* Make sure this TID isn't already enabled */ 936 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 937 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 938 queue, tid); 939 return false; 940 } 941 942 /* Update mappings and refcounts */ 943 if (mvm->queue_info[queue].tid_bitmap) 944 enable_queue = false; 945 946 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 947 mvm->queue_info[queue].ra_sta_id = sta_id; 948 949 if (enable_queue) { 950 if (tid != IWL_MAX_TID_COUNT) 951 mvm->queue_info[queue].mac80211_ac = 952 tid_to_mac80211_ac[tid]; 953 else 954 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 955 956 mvm->queue_info[queue].txq_tid = tid; 957 } 958 959 if (sta) { 960 struct iwl_mvm_txq *mvmtxq = 961 iwl_mvm_txq_from_tid(sta, tid); 962 963 mvmtxq->txq_id = queue; 964 } 965 966 IWL_DEBUG_TX_QUEUES(mvm, 967 "Enabling TXQ #%d tids=0x%x\n", 968 queue, mvm->queue_info[queue].tid_bitmap); 969 970 return enable_queue; 971 } 972 973 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 974 int queue, u16 ssn, 975 const struct iwl_trans_txq_scd_cfg *cfg, 976 unsigned int wdg_timeout) 977 { 978 struct iwl_scd_txq_cfg_cmd cmd = { 979 .scd_queue = queue, 980 .action = SCD_CFG_ENABLE_QUEUE, 981 .window = cfg->frame_limit, 982 .sta_id = cfg->sta_id, 983 .ssn = cpu_to_le16(ssn), 984 .tx_fifo = cfg->fifo, 985 .aggregate = cfg->aggregate, 986 .tid = cfg->tid, 987 }; 988 bool inc_ssn; 989 990 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 991 return false; 992 993 /* Send the enabling command if we need to */ 994 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 995 return false; 996 997 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 998 NULL, wdg_timeout); 999 if (inc_ssn) 1000 le16_add_cpu(&cmd.ssn, 1); 1001 1002 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 1003 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 1004 1005 return inc_ssn; 1006 } 1007 1008 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 1009 { 1010 struct iwl_scd_txq_cfg_cmd cmd = { 1011 .scd_queue = queue, 1012 .action = SCD_CFG_UPDATE_QUEUE_TID, 1013 }; 1014 int tid; 1015 unsigned long tid_bitmap; 1016 int ret; 1017 1018 lockdep_assert_held(&mvm->mutex); 1019 1020 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1021 return; 1022 1023 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1024 1025 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 1026 return; 1027 1028 /* Find any TID for queue */ 1029 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1030 cmd.tid = tid; 1031 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 1032 1033 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 1034 if (ret) { 1035 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 1036 queue, ret); 1037 return; 1038 } 1039 1040 mvm->queue_info[queue].txq_tid = tid; 1041 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 1042 queue, tid); 1043 } 1044 1045 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 1046 { 1047 struct ieee80211_sta *sta; 1048 struct iwl_mvm_sta *mvmsta; 1049 u8 sta_id; 1050 int tid = -1; 1051 unsigned long tid_bitmap; 1052 unsigned int wdg_timeout; 1053 int ssn; 1054 int ret = true; 1055 1056 /* queue sharing is disabled on new TX path */ 1057 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1058 return; 1059 1060 lockdep_assert_held(&mvm->mutex); 1061 1062 sta_id = mvm->queue_info[queue].ra_sta_id; 1063 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1064 1065 /* Find TID for queue, and make sure it is the only one on the queue */ 1066 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1067 if (tid_bitmap != BIT(tid)) { 1068 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 1069 queue, tid_bitmap); 1070 return; 1071 } 1072 1073 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 1074 tid); 1075 1076 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1077 lockdep_is_held(&mvm->mutex)); 1078 1079 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1080 return; 1081 1082 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1083 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif); 1084 1085 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1086 1087 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 1088 tid_to_mac80211_ac[tid], ssn, 1089 wdg_timeout, true, 1090 iwl_mvm_txq_from_tid(sta, tid)); 1091 if (ret) { 1092 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 1093 return; 1094 } 1095 1096 /* If aggs should be turned back on - do it */ 1097 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1098 struct iwl_mvm_add_sta_cmd cmd = {0}; 1099 1100 mvmsta->tid_disable_agg &= ~BIT(tid); 1101 1102 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1103 cmd.sta_id = mvmsta->deflink.sta_id; 1104 cmd.add_modify = STA_MODE_MODIFY; 1105 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1106 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1107 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1108 1109 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1110 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1111 if (!ret) { 1112 IWL_DEBUG_TX_QUEUES(mvm, 1113 "TXQ #%d is now aggregated again\n", 1114 queue); 1115 1116 /* Mark queue intenally as aggregating again */ 1117 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1118 } 1119 } 1120 1121 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1122 } 1123 1124 /* 1125 * Remove inactive TIDs of a given queue. 1126 * If all queue TIDs are inactive - mark the queue as inactive 1127 * If only some the queue TIDs are inactive - unmap them from the queue 1128 * 1129 * Returns %true if all TIDs were removed and the queue could be reused. 1130 */ 1131 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1132 struct iwl_mvm_sta *mvmsta, int queue, 1133 unsigned long tid_bitmap, 1134 unsigned long *unshare_queues, 1135 unsigned long *changetid_queues) 1136 { 1137 unsigned int tid; 1138 1139 lockdep_assert_held(&mvmsta->lock); 1140 lockdep_assert_held(&mvm->mutex); 1141 1142 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1143 return false; 1144 1145 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1146 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1147 /* If some TFDs are still queued - don't mark TID as inactive */ 1148 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1149 tid_bitmap &= ~BIT(tid); 1150 1151 /* Don't mark as inactive any TID that has an active BA */ 1152 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1153 tid_bitmap &= ~BIT(tid); 1154 } 1155 1156 /* If all TIDs in the queue are inactive - return it can be reused */ 1157 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1158 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1159 return true; 1160 } 1161 1162 /* 1163 * If we are here, this is a shared queue and not all TIDs timed-out. 1164 * Remove the ones that did. 1165 */ 1166 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1167 u16 q_tid_bitmap; 1168 1169 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1170 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1171 1172 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1173 1174 /* 1175 * We need to take into account a situation in which a TXQ was 1176 * allocated to TID x, and then turned shared by adding TIDs y 1177 * and z. If TID x becomes inactive and is removed from the TXQ, 1178 * ownership must be given to one of the remaining TIDs. 1179 * This is mainly because if TID x continues - a new queue can't 1180 * be allocated for it as long as it is an owner of another TXQ. 1181 * 1182 * Mark this queue in the right bitmap, we'll send the command 1183 * to the firmware later. 1184 */ 1185 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1186 set_bit(queue, changetid_queues); 1187 1188 IWL_DEBUG_TX_QUEUES(mvm, 1189 "Removing inactive TID %d from shared Q:%d\n", 1190 tid, queue); 1191 } 1192 1193 IWL_DEBUG_TX_QUEUES(mvm, 1194 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1195 mvm->queue_info[queue].tid_bitmap); 1196 1197 /* 1198 * There may be different TIDs with the same mac queues, so make 1199 * sure all TIDs have existing corresponding mac queues enabled 1200 */ 1201 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1202 1203 /* If the queue is marked as shared - "unshare" it */ 1204 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1205 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1206 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1207 queue); 1208 set_bit(queue, unshare_queues); 1209 } 1210 1211 return false; 1212 } 1213 1214 /* 1215 * Check for inactivity - this includes checking if any queue 1216 * can be unshared and finding one (and only one) that can be 1217 * reused. 1218 * This function is also invoked as a sort of clean-up task, 1219 * in which case @alloc_for_sta is IWL_INVALID_STA. 1220 * 1221 * Returns the queue number, or -ENOSPC. 1222 */ 1223 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1224 { 1225 unsigned long now = jiffies; 1226 unsigned long unshare_queues = 0; 1227 unsigned long changetid_queues = 0; 1228 int i, ret, free_queue = -ENOSPC; 1229 struct ieee80211_sta *queue_owner = NULL; 1230 1231 lockdep_assert_held(&mvm->mutex); 1232 1233 if (iwl_mvm_has_new_tx_api(mvm)) 1234 return -ENOSPC; 1235 1236 rcu_read_lock(); 1237 1238 /* we skip the CMD queue below by starting at 1 */ 1239 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1240 1241 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1242 struct ieee80211_sta *sta; 1243 struct iwl_mvm_sta *mvmsta; 1244 u8 sta_id; 1245 int tid; 1246 unsigned long inactive_tid_bitmap = 0; 1247 unsigned long queue_tid_bitmap; 1248 1249 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1250 if (!queue_tid_bitmap) 1251 continue; 1252 1253 /* If TXQ isn't in active use anyway - nothing to do here... */ 1254 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1255 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1256 continue; 1257 1258 /* Check to see if there are inactive TIDs on this queue */ 1259 for_each_set_bit(tid, &queue_tid_bitmap, 1260 IWL_MAX_TID_COUNT + 1) { 1261 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1262 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1263 continue; 1264 1265 inactive_tid_bitmap |= BIT(tid); 1266 } 1267 1268 /* If all TIDs are active - finish check on this queue */ 1269 if (!inactive_tid_bitmap) 1270 continue; 1271 1272 /* 1273 * If we are here - the queue hadn't been served recently and is 1274 * in use 1275 */ 1276 1277 sta_id = mvm->queue_info[i].ra_sta_id; 1278 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1279 1280 /* 1281 * If the STA doesn't exist anymore, it isn't an error. It could 1282 * be that it was removed since getting the queues, and in this 1283 * case it should've inactivated its queues anyway. 1284 */ 1285 if (IS_ERR_OR_NULL(sta)) 1286 continue; 1287 1288 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1289 1290 spin_lock_bh(&mvmsta->lock); 1291 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1292 inactive_tid_bitmap, 1293 &unshare_queues, 1294 &changetid_queues); 1295 if (ret && free_queue < 0) { 1296 queue_owner = sta; 1297 free_queue = i; 1298 } 1299 /* only unlock sta lock - we still need the queue info lock */ 1300 spin_unlock_bh(&mvmsta->lock); 1301 } 1302 1303 1304 /* Reconfigure queues requiring reconfiguation */ 1305 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1306 iwl_mvm_unshare_queue(mvm, i); 1307 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1308 iwl_mvm_change_queue_tid(mvm, i); 1309 1310 rcu_read_unlock(); 1311 1312 if (free_queue >= 0 && alloc_for_sta != IWL_INVALID_STA) { 1313 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1314 alloc_for_sta); 1315 if (ret) 1316 return ret; 1317 } 1318 1319 return free_queue; 1320 } 1321 1322 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1323 struct ieee80211_sta *sta, u8 ac, int tid) 1324 { 1325 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1326 struct iwl_trans_txq_scd_cfg cfg = { 1327 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1328 .sta_id = mvmsta->deflink.sta_id, 1329 .tid = tid, 1330 .frame_limit = IWL_FRAME_LIMIT, 1331 }; 1332 unsigned int wdg_timeout = 1333 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif); 1334 int queue = -1; 1335 u16 queue_tmp; 1336 unsigned long disable_agg_tids = 0; 1337 enum iwl_mvm_agg_state queue_state; 1338 bool shared_queue = false, inc_ssn; 1339 int ssn; 1340 unsigned long tfd_queue_mask; 1341 int ret; 1342 1343 lockdep_assert_held(&mvm->mutex); 1344 1345 if (iwl_mvm_has_new_tx_api(mvm)) 1346 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1347 1348 spin_lock_bh(&mvmsta->lock); 1349 tfd_queue_mask = mvmsta->tfd_queue_msk; 1350 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1351 spin_unlock_bh(&mvmsta->lock); 1352 1353 if (tid == IWL_MAX_TID_COUNT) { 1354 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 1355 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1356 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1357 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1358 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1359 queue); 1360 1361 /* If no such queue is found, we'll use a DATA queue instead */ 1362 } 1363 1364 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1365 (mvm->queue_info[mvmsta->reserved_queue].status == 1366 IWL_MVM_QUEUE_RESERVED)) { 1367 queue = mvmsta->reserved_queue; 1368 mvm->queue_info[queue].reserved = true; 1369 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1370 } 1371 1372 if (queue < 0) 1373 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 1374 IWL_MVM_DQA_MIN_DATA_QUEUE, 1375 IWL_MVM_DQA_MAX_DATA_QUEUE); 1376 if (queue < 0) { 1377 /* try harder - perhaps kill an inactive queue */ 1378 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id); 1379 } 1380 1381 /* No free queue - we'll have to share */ 1382 if (queue <= 0) { 1383 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1384 if (queue > 0) { 1385 shared_queue = true; 1386 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1387 } 1388 } 1389 1390 /* 1391 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1392 * to make sure no one else takes it. 1393 * This will allow avoiding re-acquiring the lock at the end of the 1394 * configuration. On error we'll mark it back as free. 1395 */ 1396 if (queue > 0 && !shared_queue) 1397 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1398 1399 /* This shouldn't happen - out of queues */ 1400 if (WARN_ON(queue <= 0)) { 1401 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1402 tid, cfg.sta_id); 1403 return queue; 1404 } 1405 1406 /* 1407 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1408 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1409 * as aggregatable. 1410 * Mark all DATA queues as allowing to be aggregated at some point 1411 */ 1412 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1413 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1414 1415 IWL_DEBUG_TX_QUEUES(mvm, 1416 "Allocating %squeue #%d to sta %d on tid %d\n", 1417 shared_queue ? "shared " : "", queue, 1418 mvmsta->deflink.sta_id, tid); 1419 1420 if (shared_queue) { 1421 /* Disable any open aggs on this queue */ 1422 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1423 1424 if (disable_agg_tids) { 1425 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1426 queue); 1427 iwl_mvm_invalidate_sta_queue(mvm, queue, 1428 disable_agg_tids, false); 1429 } 1430 } 1431 1432 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1433 1434 /* 1435 * Mark queue as shared in transport if shared 1436 * Note this has to be done after queue enablement because enablement 1437 * can also set this value, and there is no indication there to shared 1438 * queues 1439 */ 1440 if (shared_queue) 1441 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1442 1443 spin_lock_bh(&mvmsta->lock); 1444 /* 1445 * This looks racy, but it is not. We have only one packet for 1446 * this ra/tid in our Tx path since we stop the Qdisc when we 1447 * need to allocate a new TFD queue. 1448 */ 1449 if (inc_ssn) { 1450 mvmsta->tid_data[tid].seq_number += 0x10; 1451 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1452 } 1453 mvmsta->tid_data[tid].txq_id = queue; 1454 mvmsta->tfd_queue_msk |= BIT(queue); 1455 queue_state = mvmsta->tid_data[tid].state; 1456 1457 if (mvmsta->reserved_queue == queue) 1458 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1459 spin_unlock_bh(&mvmsta->lock); 1460 1461 if (!shared_queue) { 1462 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1463 if (ret) 1464 goto out_err; 1465 1466 /* If we need to re-enable aggregations... */ 1467 if (queue_state == IWL_AGG_ON) { 1468 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1469 if (ret) 1470 goto out_err; 1471 } 1472 } else { 1473 /* Redirect queue, if needed */ 1474 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1475 wdg_timeout, false, 1476 iwl_mvm_txq_from_tid(sta, tid)); 1477 if (ret) 1478 goto out_err; 1479 } 1480 1481 return 0; 1482 1483 out_err: 1484 queue_tmp = queue; 1485 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid); 1486 1487 return ret; 1488 } 1489 1490 int iwl_mvm_sta_ensure_queue(struct iwl_mvm *mvm, 1491 struct ieee80211_txq *txq) 1492 { 1493 struct iwl_mvm_txq *mvmtxq = iwl_mvm_txq_from_mac80211(txq); 1494 int ret = -EINVAL; 1495 1496 lockdep_assert_held(&mvm->mutex); 1497 1498 if (likely(test_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state)) || 1499 !txq->sta) { 1500 return 0; 1501 } 1502 1503 if (!iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, txq->tid)) { 1504 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 1505 ret = 0; 1506 } 1507 1508 local_bh_disable(); 1509 spin_lock(&mvm->add_stream_lock); 1510 if (!list_empty(&mvmtxq->list)) 1511 list_del_init(&mvmtxq->list); 1512 spin_unlock(&mvm->add_stream_lock); 1513 local_bh_enable(); 1514 1515 return ret; 1516 } 1517 1518 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1519 { 1520 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1521 add_stream_wk); 1522 1523 guard(mvm)(mvm); 1524 1525 /* will reschedule to run after restart */ 1526 if (test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status) || 1527 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1528 return; 1529 1530 iwl_mvm_inactivity_check(mvm, IWL_INVALID_STA); 1531 1532 while (!list_empty(&mvm->add_stream_txqs)) { 1533 struct iwl_mvm_txq *mvmtxq; 1534 struct ieee80211_txq *txq; 1535 u8 tid; 1536 1537 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1538 struct iwl_mvm_txq, list); 1539 1540 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1541 drv_priv); 1542 tid = txq->tid; 1543 if (tid == IEEE80211_NUM_TIDS) 1544 tid = IWL_MAX_TID_COUNT; 1545 1546 /* 1547 * We can't really do much here, but if this fails we can't 1548 * transmit anyway - so just don't transmit the frame etc. 1549 * and let them back up ... we've tried our best to allocate 1550 * a queue in the function itself. 1551 */ 1552 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1553 spin_lock_bh(&mvm->add_stream_lock); 1554 list_del_init(&mvmtxq->list); 1555 spin_unlock_bh(&mvm->add_stream_lock); 1556 continue; 1557 } 1558 1559 /* now we're ready, any remaining races/concurrency will be 1560 * handled in iwl_mvm_mac_itxq_xmit() 1561 */ 1562 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 1563 1564 local_bh_disable(); 1565 spin_lock(&mvm->add_stream_lock); 1566 list_del_init(&mvmtxq->list); 1567 spin_unlock(&mvm->add_stream_lock); 1568 1569 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1570 local_bh_enable(); 1571 } 1572 } 1573 1574 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1575 struct ieee80211_sta *sta, 1576 enum nl80211_iftype vif_type) 1577 { 1578 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1579 int queue; 1580 1581 /* queue reserving is disabled on new TX path */ 1582 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1583 return 0; 1584 1585 /* run the general cleanup/unsharing of queues */ 1586 iwl_mvm_inactivity_check(mvm, IWL_INVALID_STA); 1587 1588 /* Make sure we have free resources for this STA */ 1589 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1590 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1591 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1592 IWL_MVM_QUEUE_FREE)) 1593 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1594 else 1595 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 1596 IWL_MVM_DQA_MIN_DATA_QUEUE, 1597 IWL_MVM_DQA_MAX_DATA_QUEUE); 1598 if (queue < 0) { 1599 /* try again - this time kick out a queue if needed */ 1600 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id); 1601 if (queue < 0) { 1602 IWL_ERR(mvm, "No available queues for new station\n"); 1603 return -ENOSPC; 1604 } 1605 } 1606 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1607 1608 mvmsta->reserved_queue = queue; 1609 1610 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1611 queue, mvmsta->deflink.sta_id); 1612 1613 return 0; 1614 } 1615 1616 /* 1617 * In DQA mode, after a HW restart the queues should be allocated as before, in 1618 * order to avoid race conditions when there are shared queues. This function 1619 * does the re-mapping and queue allocation. 1620 * 1621 * Note that re-enabling aggregations isn't done in this function. 1622 */ 1623 void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1624 struct ieee80211_sta *sta) 1625 { 1626 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1627 unsigned int wdg = 1628 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif); 1629 int i; 1630 struct iwl_trans_txq_scd_cfg cfg = { 1631 .sta_id = mvm_sta->deflink.sta_id, 1632 .frame_limit = IWL_FRAME_LIMIT, 1633 }; 1634 1635 /* Make sure reserved queue is still marked as such (if allocated) */ 1636 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1637 mvm->queue_info[mvm_sta->reserved_queue].status = 1638 IWL_MVM_QUEUE_RESERVED; 1639 1640 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1641 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1642 int txq_id = tid_data->txq_id; 1643 int ac; 1644 1645 if (txq_id == IWL_MVM_INVALID_QUEUE) 1646 continue; 1647 1648 ac = tid_to_mac80211_ac[i]; 1649 1650 if (iwl_mvm_has_new_tx_api(mvm)) { 1651 IWL_DEBUG_TX_QUEUES(mvm, 1652 "Re-mapping sta %d tid %d\n", 1653 mvm_sta->deflink.sta_id, i); 1654 txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta, 1655 mvm_sta->deflink.sta_id, 1656 i, wdg); 1657 /* 1658 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1659 * to try again later, we have no other good way of 1660 * failing here 1661 */ 1662 if (txq_id < 0) 1663 txq_id = IWL_MVM_INVALID_QUEUE; 1664 tid_data->txq_id = txq_id; 1665 1666 /* 1667 * Since we don't set the seq number after reset, and HW 1668 * sets it now, FW reset will cause the seq num to start 1669 * at 0 again, so driver will need to update it 1670 * internally as well, so it keeps in sync with real val 1671 */ 1672 tid_data->seq_number = 0; 1673 } else { 1674 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1675 1676 cfg.tid = i; 1677 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1678 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1679 txq_id == 1680 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1681 1682 IWL_DEBUG_TX_QUEUES(mvm, 1683 "Re-mapping sta %d tid %d to queue %d\n", 1684 mvm_sta->deflink.sta_id, i, 1685 txq_id); 1686 1687 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1688 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1689 } 1690 } 1691 } 1692 1693 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1694 struct iwl_mvm_int_sta *sta, 1695 const u8 *addr, 1696 u16 mac_id, u16 color) 1697 { 1698 struct iwl_mvm_add_sta_cmd cmd; 1699 int ret; 1700 u32 status = ADD_STA_SUCCESS; 1701 1702 lockdep_assert_held(&mvm->mutex); 1703 1704 memset(&cmd, 0, sizeof(cmd)); 1705 cmd.sta_id = sta->sta_id; 1706 1707 if (iwl_mvm_has_new_station_api(mvm->fw) && 1708 sta->type == IWL_STA_AUX_ACTIVITY) 1709 cmd.mac_id_n_color = cpu_to_le32(mac_id); 1710 else 1711 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1712 color)); 1713 1714 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1715 cmd.station_type = sta->type; 1716 1717 if (!iwl_mvm_has_new_tx_api(mvm)) 1718 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1719 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1720 1721 if (addr) 1722 memcpy(cmd.addr, addr, ETH_ALEN); 1723 1724 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1725 iwl_mvm_add_sta_cmd_size(mvm), 1726 &cmd, &status); 1727 if (ret) 1728 return ret; 1729 1730 switch (status & IWL_ADD_STA_STATUS_MASK) { 1731 case ADD_STA_SUCCESS: 1732 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1733 return 0; 1734 default: 1735 ret = -EIO; 1736 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1737 status); 1738 break; 1739 } 1740 return ret; 1741 } 1742 1743 /* Initialize driver data of a new sta */ 1744 int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1745 struct ieee80211_sta *sta, int sta_id, u8 sta_type) 1746 { 1747 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1748 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1749 struct iwl_mvm_rxq_dup_data *dup_data; 1750 int i, ret = 0; 1751 1752 lockdep_assert_held(&mvm->mutex); 1753 1754 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1755 mvmvif->color); 1756 mvm_sta->vif = vif; 1757 1758 /* for MLD sta_id(s) should be allocated for each link before calling 1759 * this function 1760 */ 1761 if (!mvm->mld_api_is_used) { 1762 if (WARN_ON(sta_id == IWL_INVALID_STA)) 1763 return -EINVAL; 1764 1765 mvm_sta->deflink.sta_id = sta_id; 1766 rcu_assign_pointer(mvm_sta->link[0], &mvm_sta->deflink); 1767 1768 if (!mvm->trans->mac_cfg->gen2) 1769 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize = 1770 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1771 else 1772 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize = 1773 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1774 } 1775 1776 mvm_sta->tt_tx_protection = false; 1777 mvm_sta->sta_type = sta_type; 1778 1779 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1780 1781 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1782 /* 1783 * Mark all queues for this STA as unallocated and defer TX 1784 * frames until the queue is allocated 1785 */ 1786 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1787 } 1788 1789 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1790 struct iwl_mvm_txq *mvmtxq = 1791 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1792 1793 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1794 INIT_LIST_HEAD(&mvmtxq->list); 1795 atomic_set(&mvmtxq->tx_request, 0); 1796 } 1797 1798 if (iwl_mvm_has_new_rx_api(mvm)) { 1799 int q; 1800 1801 dup_data = kzalloc_objs(*dup_data, mvm->trans->info.num_rxqs); 1802 if (!dup_data) 1803 return -ENOMEM; 1804 /* 1805 * Initialize all the last_seq values to 0xffff which can never 1806 * compare equal to the frame's seq_ctrl in the check in 1807 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1808 * number and fragmented packets don't reach that function. 1809 * 1810 * This thus allows receiving a packet with seqno 0 and the 1811 * retry bit set as the very first packet on a new TID. 1812 */ 1813 for (q = 0; q < mvm->trans->info.num_rxqs; q++) 1814 memset(dup_data[q].last_seq, 0xff, 1815 sizeof(dup_data[q].last_seq)); 1816 mvm_sta->dup_data = dup_data; 1817 } 1818 1819 if (!iwl_mvm_has_new_tx_api(mvm)) { 1820 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1821 ieee80211_vif_type_p2p(vif)); 1822 if (ret) 1823 return ret; 1824 } 1825 1826 /* 1827 * if rs is registered with mac80211, then "add station" will be handled 1828 * via the corresponding ops, otherwise need to notify rate scaling here 1829 */ 1830 if (iwl_mvm_has_tlc_offload(mvm)) 1831 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1832 else 1833 spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock); 1834 1835 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1836 1837 return 0; 1838 } 1839 1840 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1841 struct ieee80211_vif *vif, 1842 struct ieee80211_sta *sta) 1843 { 1844 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1845 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1846 int ret, sta_id; 1847 bool sta_update = false; 1848 unsigned int sta_flags = 0; 1849 1850 lockdep_assert_held(&mvm->mutex); 1851 1852 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1853 sta_id = iwl_mvm_find_free_sta_id(mvm, 1854 ieee80211_vif_type_p2p(vif)); 1855 else 1856 sta_id = mvm_sta->deflink.sta_id; 1857 1858 if (sta_id == IWL_INVALID_STA) 1859 return -ENOSPC; 1860 1861 spin_lock_init(&mvm_sta->lock); 1862 1863 /* if this is a HW restart re-alloc existing queues */ 1864 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1865 struct iwl_mvm_int_sta tmp_sta = { 1866 .sta_id = sta_id, 1867 .type = mvm_sta->sta_type, 1868 }; 1869 1870 /* First add an empty station since allocating 1871 * a queue requires a valid station 1872 */ 1873 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1874 mvmvif->id, mvmvif->color); 1875 if (ret) 1876 goto err; 1877 1878 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1879 sta_update = true; 1880 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1881 goto update_fw; 1882 } 1883 1884 ret = iwl_mvm_sta_init(mvm, vif, sta, sta_id, 1885 sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK); 1886 if (ret) 1887 goto err; 1888 1889 update_fw: 1890 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1891 if (ret) 1892 goto err; 1893 1894 if (vif->type == NL80211_IFTYPE_STATION) { 1895 if (!sta->tdls) { 1896 WARN_ON(mvmvif->deflink.ap_sta_id != IWL_INVALID_STA); 1897 mvmvif->deflink.ap_sta_id = sta_id; 1898 } else { 1899 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_INVALID_STA); 1900 } 1901 } 1902 1903 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1904 1905 return 0; 1906 1907 err: 1908 return ret; 1909 } 1910 1911 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1912 bool drain) 1913 { 1914 struct iwl_mvm_add_sta_cmd cmd = {}; 1915 int ret; 1916 u32 status; 1917 1918 lockdep_assert_held(&mvm->mutex); 1919 1920 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1921 cmd.sta_id = mvmsta->deflink.sta_id; 1922 cmd.add_modify = STA_MODE_MODIFY; 1923 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1924 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1925 1926 status = ADD_STA_SUCCESS; 1927 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1928 iwl_mvm_add_sta_cmd_size(mvm), 1929 &cmd, &status); 1930 if (ret) 1931 return ret; 1932 1933 switch (status & IWL_ADD_STA_STATUS_MASK) { 1934 case ADD_STA_SUCCESS: 1935 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1936 mvmsta->deflink.sta_id); 1937 break; 1938 default: 1939 ret = -EIO; 1940 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1941 mvmsta->deflink.sta_id); 1942 break; 1943 } 1944 1945 return ret; 1946 } 1947 1948 /* 1949 * Remove a station from the FW table. Before sending the command to remove 1950 * the station validate that the station is indeed known to the driver (sanity 1951 * only). 1952 */ 1953 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1954 { 1955 struct ieee80211_sta *sta; 1956 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1957 .sta_id = sta_id, 1958 }; 1959 int ret; 1960 1961 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1962 lockdep_is_held(&mvm->mutex)); 1963 1964 /* Note: internal stations are marked as error values */ 1965 if (!sta) { 1966 IWL_ERR(mvm, "Invalid station id\n"); 1967 return -EINVAL; 1968 } 1969 1970 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1971 sizeof(rm_sta_cmd), &rm_sta_cmd); 1972 if (ret) { 1973 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1974 return ret; 1975 } 1976 1977 return 0; 1978 } 1979 1980 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1981 struct ieee80211_vif *vif, 1982 struct ieee80211_sta *sta) 1983 { 1984 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1985 int i; 1986 1987 lockdep_assert_held(&mvm->mutex); 1988 1989 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1990 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1991 continue; 1992 1993 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id, 1994 &mvm_sta->tid_data[i].txq_id, i); 1995 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1996 } 1997 1998 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1999 struct iwl_mvm_txq *mvmtxq = 2000 iwl_mvm_txq_from_mac80211(sta->txq[i]); 2001 2002 spin_lock_bh(&mvm->add_stream_lock); 2003 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 2004 list_del_init(&mvmtxq->list); 2005 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 2006 spin_unlock_bh(&mvm->add_stream_lock); 2007 } 2008 } 2009 2010 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 2011 struct iwl_mvm_sta *mvm_sta) 2012 { 2013 int i; 2014 2015 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 2016 u16 txq_id; 2017 int ret; 2018 2019 spin_lock_bh(&mvm_sta->lock); 2020 txq_id = mvm_sta->tid_data[i].txq_id; 2021 spin_unlock_bh(&mvm_sta->lock); 2022 2023 if (txq_id == IWL_MVM_INVALID_QUEUE) 2024 continue; 2025 2026 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2027 if (ret) 2028 return ret; 2029 } 2030 2031 return 0; 2032 } 2033 2034 /* Execute the common part for both MLD and non-MLD modes. 2035 * Returns if we're done with removing the station, either 2036 * with error or success 2037 */ 2038 void iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2039 struct ieee80211_sta *sta, 2040 struct ieee80211_link_sta *link_sta) 2041 { 2042 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2043 struct iwl_mvm_vif_link_info *mvm_link = 2044 mvmvif->link[link_sta->link_id]; 2045 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2046 struct iwl_mvm_link_sta *mvm_link_sta; 2047 u8 sta_id; 2048 2049 lockdep_assert_held(&mvm->mutex); 2050 2051 mvm_link_sta = 2052 rcu_dereference_protected(mvm_sta->link[link_sta->link_id], 2053 lockdep_is_held(&mvm->mutex)); 2054 sta_id = mvm_link_sta->sta_id; 2055 2056 if (vif->type == NL80211_IFTYPE_STATION && 2057 mvm_link->ap_sta_id == sta_id) { 2058 /* first remove remaining keys */ 2059 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 2060 link_sta->link_id); 2061 2062 mvm_link->ap_sta_id = IWL_INVALID_STA; 2063 } 2064 2065 /* 2066 * This shouldn't happen - the TDLS channel switch should be canceled 2067 * before the STA is removed. 2068 */ 2069 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 2070 mvm->tdls_cs.peer.sta_id = IWL_INVALID_STA; 2071 cancel_delayed_work(&mvm->tdls_cs.dwork); 2072 } 2073 } 2074 2075 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 2076 struct ieee80211_vif *vif, 2077 struct ieee80211_sta *sta) 2078 { 2079 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2080 int ret; 2081 2082 lockdep_assert_held(&mvm->mutex); 2083 2084 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 2085 if (ret) 2086 return ret; 2087 2088 /* flush its queues here since we are freeing mvm_sta */ 2089 ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id, 2090 mvm_sta->tfd_queue_msk); 2091 if (ret) 2092 return ret; 2093 if (iwl_mvm_has_new_tx_api(mvm)) { 2094 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 2095 } else { 2096 u32 q_mask = mvm_sta->tfd_queue_msk; 2097 2098 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2099 q_mask); 2100 } 2101 if (ret) 2102 return ret; 2103 2104 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 2105 2106 iwl_mvm_disable_sta_queues(mvm, vif, sta); 2107 2108 /* If there is a TXQ still marked as reserved - free it */ 2109 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 2110 u8 reserved_txq = mvm_sta->reserved_queue; 2111 enum iwl_mvm_queue_status *status; 2112 2113 /* 2114 * If no traffic has gone through the reserved TXQ - it 2115 * is still marked as IWL_MVM_QUEUE_RESERVED, and 2116 * should be manually marked as free again 2117 */ 2118 status = &mvm->queue_info[reserved_txq].status; 2119 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 2120 (*status != IWL_MVM_QUEUE_FREE), 2121 "sta_id %d reserved txq %d status %d", 2122 mvm_sta->deflink.sta_id, reserved_txq, *status)) 2123 return -EINVAL; 2124 2125 *status = IWL_MVM_QUEUE_FREE; 2126 } 2127 2128 iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink); 2129 2130 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id); 2131 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL); 2132 2133 return ret; 2134 } 2135 2136 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 2137 struct ieee80211_vif *vif, 2138 u8 sta_id) 2139 { 2140 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 2141 2142 lockdep_assert_held(&mvm->mutex); 2143 2144 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 2145 return ret; 2146 } 2147 2148 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 2149 struct iwl_mvm_int_sta *sta, 2150 u32 qmask, enum nl80211_iftype iftype, 2151 u8 type) 2152 { 2153 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 2154 sta->sta_id == IWL_INVALID_STA) { 2155 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 2156 if (WARN_ON_ONCE(sta->sta_id == IWL_INVALID_STA)) 2157 return -ENOSPC; 2158 } 2159 2160 sta->tfd_queue_msk = qmask; 2161 sta->type = type; 2162 2163 /* put a non-NULL value so iterating over the stations won't stop */ 2164 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 2165 return 0; 2166 } 2167 2168 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 2169 { 2170 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 2171 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 2172 sta->sta_id = IWL_INVALID_STA; 2173 } 2174 2175 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 2176 u8 sta_id, u8 fifo) 2177 { 2178 unsigned int wdg_timeout = 2179 mvm->trans->mac_cfg->base->wd_timeout; 2180 struct iwl_trans_txq_scd_cfg cfg = { 2181 .fifo = fifo, 2182 .sta_id = sta_id, 2183 .tid = IWL_MAX_TID_COUNT, 2184 .aggregate = false, 2185 .frame_limit = IWL_FRAME_LIMIT, 2186 }; 2187 2188 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2189 2190 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2191 } 2192 2193 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 2194 { 2195 unsigned int wdg_timeout = 2196 mvm->trans->mac_cfg->base->wd_timeout; 2197 2198 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2199 2200 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT, 2201 wdg_timeout); 2202 } 2203 2204 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2205 int maccolor, u8 *addr, 2206 struct iwl_mvm_int_sta *sta, 2207 u16 *queue, int fifo) 2208 { 2209 int ret; 2210 2211 /* Map queue to fifo - needs to happen before adding station */ 2212 if (!iwl_mvm_has_new_tx_api(mvm)) 2213 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2214 2215 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor); 2216 if (ret) { 2217 if (!iwl_mvm_has_new_tx_api(mvm)) 2218 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue, 2219 IWL_MAX_TID_COUNT); 2220 return ret; 2221 } 2222 2223 /* 2224 * For 22000 firmware and on we cannot add queue to a station unknown 2225 * to firmware so enable queue here - after the station was added 2226 */ 2227 if (iwl_mvm_has_new_tx_api(mvm)) { 2228 int txq; 2229 2230 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2231 if (txq < 0) { 2232 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2233 return txq; 2234 } 2235 2236 *queue = txq; 2237 } 2238 2239 return 0; 2240 } 2241 2242 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id) 2243 { 2244 int ret; 2245 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 : 2246 BIT(mvm->aux_queue); 2247 2248 lockdep_assert_held(&mvm->mutex); 2249 2250 /* Allocate aux station and assign to it the aux queue */ 2251 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask, 2252 NL80211_IFTYPE_UNSPECIFIED, 2253 IWL_STA_AUX_ACTIVITY); 2254 if (ret) 2255 return ret; 2256 2257 /* 2258 * In CDB NICs we need to specify which lmac to use for aux activity 2259 * using the mac_id argument place to send lmac_id to the function 2260 */ 2261 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL, 2262 &mvm->aux_sta, &mvm->aux_queue, 2263 IWL_MVM_TX_FIFO_MCAST); 2264 if (ret) { 2265 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2266 return ret; 2267 } 2268 2269 return 0; 2270 } 2271 2272 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2273 { 2274 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2275 2276 lockdep_assert_held(&mvm->mutex); 2277 2278 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2279 NULL, &mvm->snif_sta, 2280 &mvm->snif_queue, 2281 IWL_MVM_TX_FIFO_BE); 2282 } 2283 2284 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2285 { 2286 int ret; 2287 2288 lockdep_assert_held(&mvm->mutex); 2289 2290 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_INVALID_STA)) 2291 return -EINVAL; 2292 2293 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id, 2294 &mvm->snif_queue, IWL_MAX_TID_COUNT); 2295 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2296 if (ret) 2297 IWL_WARN(mvm, "Failed sending remove station\n"); 2298 2299 return ret; 2300 } 2301 2302 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2303 { 2304 int ret; 2305 2306 lockdep_assert_held(&mvm->mutex); 2307 2308 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_INVALID_STA)) 2309 return -EINVAL; 2310 2311 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id, 2312 &mvm->aux_queue, IWL_MAX_TID_COUNT); 2313 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2314 if (ret) 2315 IWL_WARN(mvm, "Failed sending remove station\n"); 2316 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2317 2318 return ret; 2319 } 2320 2321 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2322 { 2323 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2324 } 2325 2326 /* 2327 * Send the add station command for the vif's broadcast station. 2328 * Assumes that the station was already allocated. 2329 * 2330 * @mvm: the mvm component 2331 * @vif: the interface to which the broadcast station is added 2332 * @bsta: the broadcast station to add. 2333 */ 2334 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2335 { 2336 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2337 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta; 2338 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2339 const u8 *baddr = _baddr; 2340 int queue; 2341 int ret; 2342 unsigned int wdg_timeout = 2343 iwl_mvm_get_wd_timeout(mvm, vif); 2344 struct iwl_trans_txq_scd_cfg cfg = { 2345 .fifo = IWL_MVM_TX_FIFO_VO, 2346 .sta_id = mvmvif->deflink.bcast_sta.sta_id, 2347 .tid = IWL_MAX_TID_COUNT, 2348 .aggregate = false, 2349 .frame_limit = IWL_FRAME_LIMIT, 2350 }; 2351 2352 lockdep_assert_held(&mvm->mutex); 2353 2354 if (!iwl_mvm_has_new_tx_api(mvm)) { 2355 if (vif->type == NL80211_IFTYPE_AP || 2356 vif->type == NL80211_IFTYPE_ADHOC) { 2357 queue = mvm->probe_queue; 2358 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2359 queue = mvm->p2p_dev_queue; 2360 } else { 2361 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2362 return -EINVAL; 2363 } 2364 2365 bsta->tfd_queue_msk |= BIT(queue); 2366 2367 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2368 } 2369 2370 if (vif->type == NL80211_IFTYPE_ADHOC) 2371 baddr = vif->bss_conf.bssid; 2372 2373 if (WARN_ON_ONCE(bsta->sta_id == IWL_INVALID_STA)) 2374 return -ENOSPC; 2375 2376 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2377 mvmvif->id, mvmvif->color); 2378 if (ret) 2379 return ret; 2380 2381 /* 2382 * For 22000 firmware and on we cannot add queue to a station unknown 2383 * to firmware so enable queue here - after the station was added 2384 */ 2385 if (iwl_mvm_has_new_tx_api(mvm)) { 2386 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id, 2387 IWL_MAX_TID_COUNT, 2388 wdg_timeout); 2389 if (queue < 0) { 2390 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2391 return queue; 2392 } 2393 2394 if (vif->type == NL80211_IFTYPE_AP || 2395 vif->type == NL80211_IFTYPE_ADHOC) { 2396 /* for queue management */ 2397 mvm->probe_queue = queue; 2398 /* for use in TX */ 2399 mvmvif->deflink.mgmt_queue = queue; 2400 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2401 mvm->p2p_dev_queue = queue; 2402 } 2403 } else if (vif->type == NL80211_IFTYPE_AP || 2404 vif->type == NL80211_IFTYPE_ADHOC) { 2405 /* set it for use in TX */ 2406 mvmvif->deflink.mgmt_queue = mvm->probe_queue; 2407 } 2408 2409 return 0; 2410 } 2411 2412 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2413 struct ieee80211_vif *vif) 2414 { 2415 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2416 u16 *queueptr, queue; 2417 2418 lockdep_assert_held(&mvm->mutex); 2419 2420 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id, 2421 mvmvif->deflink.bcast_sta.tfd_queue_msk); 2422 2423 switch (vif->type) { 2424 case NL80211_IFTYPE_AP: 2425 case NL80211_IFTYPE_ADHOC: 2426 queueptr = &mvm->probe_queue; 2427 break; 2428 case NL80211_IFTYPE_P2P_DEVICE: 2429 queueptr = &mvm->p2p_dev_queue; 2430 break; 2431 default: 2432 WARN(1, "Can't free bcast queue on vif type %d\n", 2433 vif->type); 2434 return; 2435 } 2436 2437 queue = *queueptr; 2438 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id, 2439 queueptr, IWL_MAX_TID_COUNT); 2440 2441 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC) 2442 mvmvif->deflink.mgmt_queue = mvm->probe_queue; 2443 2444 if (iwl_mvm_has_new_tx_api(mvm)) 2445 return; 2446 2447 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue))); 2448 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue); 2449 } 2450 2451 /* Send the FW a request to remove the station from its internal data 2452 * structures, but DO NOT remove the entry from the local data structures. */ 2453 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2454 { 2455 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2456 int ret; 2457 2458 lockdep_assert_held(&mvm->mutex); 2459 2460 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2461 2462 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id); 2463 if (ret) 2464 IWL_WARN(mvm, "Failed sending remove station\n"); 2465 return ret; 2466 } 2467 2468 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2469 { 2470 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2471 2472 lockdep_assert_held(&mvm->mutex); 2473 2474 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0, 2475 ieee80211_vif_type_p2p(vif), 2476 IWL_STA_GENERAL_PURPOSE); 2477 } 2478 2479 /* Allocate a new station entry for the broadcast station to the given vif, 2480 * and send it to the FW. 2481 * Note that each P2P mac should have its own broadcast station. 2482 * 2483 * @mvm: the mvm component 2484 * @vif: the interface to which the broadcast station is added 2485 * @bsta: the broadcast station to add. */ 2486 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2487 { 2488 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2489 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta; 2490 int ret; 2491 2492 lockdep_assert_held(&mvm->mutex); 2493 2494 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2495 if (ret) 2496 return ret; 2497 2498 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2499 2500 if (ret) 2501 iwl_mvm_dealloc_int_sta(mvm, bsta); 2502 2503 return ret; 2504 } 2505 2506 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2507 { 2508 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2509 2510 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta); 2511 } 2512 2513 /* 2514 * Send the FW a request to remove the station from its internal data 2515 * structures, and in addition remove it from the local data structure. 2516 */ 2517 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2518 { 2519 int ret; 2520 2521 lockdep_assert_held(&mvm->mutex); 2522 2523 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2524 2525 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2526 2527 return ret; 2528 } 2529 2530 /* 2531 * Allocate a new station entry for the multicast station to the given vif, 2532 * and send it to the FW. 2533 * Note that each AP/GO mac should have its own multicast station. 2534 * 2535 * @mvm: the mvm component 2536 * @vif: the interface to which the multicast station is added 2537 */ 2538 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2539 { 2540 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2541 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta; 2542 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2543 const u8 *maddr = _maddr; 2544 struct iwl_trans_txq_scd_cfg cfg = { 2545 .fifo = vif->type == NL80211_IFTYPE_AP ? 2546 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2547 .sta_id = msta->sta_id, 2548 .tid = 0, 2549 .aggregate = false, 2550 .frame_limit = IWL_FRAME_LIMIT, 2551 }; 2552 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif); 2553 int ret; 2554 2555 lockdep_assert_held(&mvm->mutex); 2556 2557 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2558 vif->type != NL80211_IFTYPE_ADHOC)) 2559 return -EOPNOTSUPP; 2560 2561 /* 2562 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2563 * invalid, so make sure we use the queue we want. 2564 * Note that this is done here as we want to avoid making DQA 2565 * changes in mac80211 layer. 2566 */ 2567 if (vif->type == NL80211_IFTYPE_ADHOC) 2568 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2569 2570 /* 2571 * While in previous FWs we had to exclude cab queue from TFD queue 2572 * mask, now it is needed as any other queue. 2573 */ 2574 if (!iwl_mvm_has_new_tx_api(mvm) && 2575 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2576 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0, 2577 &cfg, 2578 timeout); 2579 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue); 2580 } 2581 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2582 mvmvif->id, mvmvif->color); 2583 if (ret) 2584 goto err; 2585 2586 /* 2587 * Enable cab queue after the ADD_STA command is sent. 2588 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2589 * command with unknown station id, and for FW that doesn't support 2590 * station API since the cab queue is not included in the 2591 * tfd_queue_mask. 2592 */ 2593 if (iwl_mvm_has_new_tx_api(mvm)) { 2594 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id, 2595 0, timeout); 2596 if (queue < 0) { 2597 ret = queue; 2598 goto err; 2599 } 2600 mvmvif->deflink.cab_queue = queue; 2601 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2602 IWL_UCODE_TLV_API_STA_TYPE)) 2603 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0, 2604 &cfg, 2605 timeout); 2606 2607 return 0; 2608 err: 2609 iwl_mvm_dealloc_int_sta(mvm, msta); 2610 return ret; 2611 } 2612 2613 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2614 struct ieee80211_key_conf *keyconf, 2615 bool mcast) 2616 { 2617 union { 2618 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2619 struct iwl_mvm_add_sta_key_cmd cmd; 2620 } u = {}; 2621 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2622 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2623 __le16 key_flags; 2624 int ret, size; 2625 u32 status; 2626 2627 /* This is a valid situation for GTK removal */ 2628 if (sta_id == IWL_INVALID_STA) 2629 return 0; 2630 2631 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2632 STA_KEY_FLG_KEYID_MSK); 2633 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2634 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2635 2636 if (mcast) 2637 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2638 2639 /* 2640 * The fields assigned here are in the same location at the start 2641 * of the command, so we can do this union trick. 2642 */ 2643 u.cmd.common.key_flags = key_flags; 2644 u.cmd.common.key_offset = keyconf->hw_key_idx; 2645 u.cmd.common.sta_id = sta_id; 2646 2647 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2648 2649 status = ADD_STA_SUCCESS; 2650 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2651 &status); 2652 2653 switch (status) { 2654 case ADD_STA_SUCCESS: 2655 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2656 break; 2657 default: 2658 ret = -EIO; 2659 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2660 break; 2661 } 2662 2663 return ret; 2664 } 2665 2666 /* 2667 * Send the FW a request to remove the station from its internal data 2668 * structures, and in addition remove it from the local data structure. 2669 */ 2670 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2671 { 2672 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2673 int ret; 2674 2675 lockdep_assert_held(&mvm->mutex); 2676 2677 iwl_mvm_flush_sta(mvm, mvmvif->deflink.mcast_sta.sta_id, 2678 mvmvif->deflink.mcast_sta.tfd_queue_msk); 2679 2680 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id, 2681 &mvmvif->deflink.cab_queue, 0); 2682 2683 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id); 2684 if (ret) 2685 IWL_WARN(mvm, "Failed sending remove station\n"); 2686 2687 return ret; 2688 } 2689 2690 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2691 { 2692 struct iwl_mvm_delba_data notif = { 2693 .baid = baid, 2694 }; 2695 2696 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true, 2697 ¬if, sizeof(notif)); 2698 }; 2699 2700 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2701 struct iwl_mvm_baid_data *data) 2702 { 2703 int i; 2704 2705 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2706 2707 for (i = 0; i < mvm->trans->info.num_rxqs; i++) { 2708 int j; 2709 struct iwl_mvm_reorder_buffer *reorder_buf = 2710 &data->reorder_buf[i]; 2711 struct iwl_mvm_reorder_buf_entry *entries = 2712 &data->entries[i * data->entries_per_queue]; 2713 2714 spin_lock_bh(&reorder_buf->lock); 2715 if (likely(!reorder_buf->num_stored)) { 2716 spin_unlock_bh(&reorder_buf->lock); 2717 continue; 2718 } 2719 2720 /* 2721 * This shouldn't happen in regular DELBA since the internal 2722 * delBA notification should trigger a release of all frames in 2723 * the reorder buffer. 2724 */ 2725 WARN_ON(1); 2726 2727 for (j = 0; j < data->buf_size; j++) 2728 __skb_queue_purge(&entries[j].frames); 2729 2730 spin_unlock_bh(&reorder_buf->lock); 2731 } 2732 } 2733 2734 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2735 struct iwl_mvm_baid_data *data, 2736 u16 ssn) 2737 { 2738 int i; 2739 2740 for (i = 0; i < mvm->trans->info.num_rxqs; i++) { 2741 struct iwl_mvm_reorder_buffer *reorder_buf = 2742 &data->reorder_buf[i]; 2743 struct iwl_mvm_reorder_buf_entry *entries = 2744 &data->entries[i * data->entries_per_queue]; 2745 int j; 2746 2747 reorder_buf->num_stored = 0; 2748 reorder_buf->head_sn = ssn; 2749 spin_lock_init(&reorder_buf->lock); 2750 reorder_buf->queue = i; 2751 reorder_buf->valid = false; 2752 for (j = 0; j < data->buf_size; j++) 2753 __skb_queue_head_init(&entries[j].frames); 2754 } 2755 } 2756 2757 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm, 2758 struct ieee80211_sta *sta, 2759 bool start, int tid, u16 ssn, 2760 u16 buf_size) 2761 { 2762 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2763 struct iwl_mvm_add_sta_cmd cmd = { 2764 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 2765 .sta_id = mvm_sta->deflink.sta_id, 2766 .add_modify = STA_MODE_MODIFY, 2767 }; 2768 u32 status; 2769 int ret; 2770 2771 if (start) { 2772 cmd.add_immediate_ba_tid = tid; 2773 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2774 cmd.rx_ba_window = cpu_to_le16(buf_size); 2775 cmd.modify_mask = STA_MODIFY_ADD_BA_TID; 2776 } else { 2777 cmd.remove_immediate_ba_tid = tid; 2778 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID; 2779 } 2780 2781 status = ADD_STA_SUCCESS; 2782 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2783 iwl_mvm_add_sta_cmd_size(mvm), 2784 &cmd, &status); 2785 if (ret) 2786 return ret; 2787 2788 switch (status & IWL_ADD_STA_STATUS_MASK) { 2789 case ADD_STA_SUCCESS: 2790 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2791 start ? "start" : "stopp"); 2792 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) && 2793 !(status & IWL_ADD_STA_BAID_VALID_MASK))) 2794 return -EINVAL; 2795 ret = u32_get_bits(status, IWL_ADD_STA_BAID_MASK); 2796 if (IWL_FW_CHECK(mvm, start && ret >= ARRAY_SIZE(mvm->baid_map), 2797 "invalid BAID %d from FW\n", ret)) 2798 return -EINVAL; 2799 return ret; 2800 case ADD_STA_IMMEDIATE_BA_FAILURE: 2801 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2802 return -ENOSPC; 2803 default: 2804 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2805 start ? "start" : "stopp", status); 2806 return -EIO; 2807 } 2808 } 2809 2810 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm, 2811 struct ieee80211_sta *sta, 2812 bool start, int tid, u16 ssn, 2813 u16 buf_size, int baid) 2814 { 2815 struct iwl_rx_baid_cfg_cmd cmd = { 2816 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) : 2817 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE), 2818 }; 2819 struct iwl_host_cmd hcmd = { 2820 .id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD), 2821 .flags = CMD_SEND_IN_RFKILL, 2822 .len[0] = sizeof(cmd), 2823 .data[0] = &cmd, 2824 }; 2825 int ret; 2826 2827 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid)); 2828 2829 if (start) { 2830 cmd.alloc.sta_id_mask = 2831 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1)); 2832 cmd.alloc.tid = tid; 2833 cmd.alloc.ssn = cpu_to_le16(ssn); 2834 cmd.alloc.win_size = cpu_to_le16(buf_size); 2835 baid = -EIO; 2836 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 1) == 1) { 2837 cmd.remove_v1.baid = cpu_to_le32(baid); 2838 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove)); 2839 } else { 2840 cmd.remove.sta_id_mask = 2841 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1)); 2842 cmd.remove.tid = cpu_to_le32(tid); 2843 } 2844 2845 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &baid); 2846 if (ret) 2847 return ret; 2848 2849 if (!start) { 2850 /* ignore firmware baid on remove */ 2851 baid = 0; 2852 } 2853 2854 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2855 start ? "start" : "stopp"); 2856 2857 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map)) 2858 return -EINVAL; 2859 2860 return baid; 2861 } 2862 2863 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2864 bool start, int tid, u16 ssn, u16 buf_size, 2865 int baid) 2866 { 2867 if (fw_has_capa(&mvm->fw->ucode_capa, 2868 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT)) 2869 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start, 2870 tid, ssn, buf_size, baid); 2871 2872 return iwl_mvm_fw_baid_op_sta(mvm, sta, start, 2873 tid, ssn, buf_size); 2874 } 2875 2876 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2877 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2878 { 2879 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2880 struct iwl_mvm_baid_data *baid_data = NULL; 2881 int ret, baid; 2882 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID : 2883 IWL_MAX_BAID_OLD; 2884 2885 lockdep_assert_held(&mvm->mutex); 2886 2887 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) { 2888 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2889 return -ENOSPC; 2890 } 2891 2892 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2893 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2894 2895 /* sparse doesn't like the __align() so don't check */ 2896 #ifndef __CHECKER__ 2897 /* 2898 * The division below will be OK if either the cache line size 2899 * can be divided by the entry size (ALIGN will round up) or if 2900 * the entry size can be divided by the cache line size, in 2901 * which case the ALIGN() will do nothing. 2902 */ 2903 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2904 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2905 #endif 2906 2907 /* 2908 * Upward align the reorder buffer size to fill an entire cache 2909 * line for each queue, to avoid sharing cache lines between 2910 * different queues. 2911 */ 2912 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2913 2914 /* 2915 * Allocate here so if allocation fails we can bail out early 2916 * before starting the BA session in the firmware 2917 */ 2918 baid_data = kzalloc(sizeof(*baid_data) + 2919 mvm->trans->info.num_rxqs * 2920 reorder_buf_size, 2921 GFP_KERNEL); 2922 if (!baid_data) 2923 return -ENOMEM; 2924 2925 /* 2926 * This division is why we need the above BUILD_BUG_ON(), 2927 * if that doesn't hold then this will not be right. 2928 */ 2929 baid_data->entries_per_queue = 2930 reorder_buf_size / sizeof(baid_data->entries[0]); 2931 } 2932 2933 if (iwl_mvm_has_new_rx_api(mvm) && !start) { 2934 baid = mvm_sta->tid_to_baid[tid]; 2935 } else { 2936 /* we don't really need it in this case */ 2937 baid = -1; 2938 } 2939 2940 /* Don't send command to remove (start=0) BAID during restart */ 2941 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 2942 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size, 2943 baid); 2944 2945 if (baid < 0) { 2946 ret = baid; 2947 goto out_free; 2948 } 2949 2950 if (start) { 2951 mvm->rx_ba_sessions++; 2952 2953 if (!iwl_mvm_has_new_rx_api(mvm)) 2954 return 0; 2955 2956 baid_data->baid = baid; 2957 baid_data->timeout = timeout; 2958 baid_data->last_rx = jiffies; 2959 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2960 timer_setup(&baid_data->session_timer, 2961 iwl_mvm_rx_agg_session_expired, 0); 2962 baid_data->mvm = mvm; 2963 baid_data->tid = tid; 2964 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1); 2965 baid_data->buf_size = buf_size; 2966 2967 mvm_sta->tid_to_baid[tid] = baid; 2968 if (timeout) 2969 mod_timer(&baid_data->session_timer, 2970 TU_TO_EXP_TIME(timeout * 2)); 2971 2972 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn); 2973 /* 2974 * protect the BA data with RCU to cover a case where our 2975 * internal RX sync mechanism will timeout (not that it's 2976 * supposed to happen) and we will free the session data while 2977 * RX is being processed in parallel 2978 */ 2979 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2980 mvm_sta->deflink.sta_id, tid, baid); 2981 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2982 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2983 } else { 2984 baid = mvm_sta->tid_to_baid[tid]; 2985 2986 if (mvm->rx_ba_sessions > 0) 2987 /* check that restart flow didn't zero the counter */ 2988 mvm->rx_ba_sessions--; 2989 if (!iwl_mvm_has_new_rx_api(mvm)) 2990 return 0; 2991 2992 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2993 return -EINVAL; 2994 2995 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2996 if (WARN_ON(!baid_data)) 2997 return -EINVAL; 2998 2999 /* synchronize all rx queues so we can safely delete */ 3000 iwl_mvm_free_reorder(mvm, baid_data); 3001 timer_shutdown_sync(&baid_data->session_timer); 3002 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 3003 kfree_rcu(baid_data, rcu_head); 3004 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 3005 } 3006 return 0; 3007 3008 out_free: 3009 kfree(baid_data); 3010 return ret; 3011 } 3012 3013 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 3014 int tid, u8 queue, bool start) 3015 { 3016 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3017 struct iwl_mvm_add_sta_cmd cmd = {}; 3018 int ret; 3019 u32 status; 3020 3021 lockdep_assert_held(&mvm->mutex); 3022 3023 if (start) { 3024 mvm_sta->tfd_queue_msk |= BIT(queue); 3025 mvm_sta->tid_disable_agg &= ~BIT(tid); 3026 } else { 3027 /* In DQA-mode the queue isn't removed on agg termination */ 3028 mvm_sta->tid_disable_agg |= BIT(tid); 3029 } 3030 3031 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 3032 cmd.sta_id = mvm_sta->deflink.sta_id; 3033 cmd.add_modify = STA_MODE_MODIFY; 3034 if (!iwl_mvm_has_new_tx_api(mvm)) 3035 cmd.modify_mask = STA_MODIFY_QUEUES; 3036 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 3037 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 3038 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 3039 3040 status = ADD_STA_SUCCESS; 3041 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 3042 iwl_mvm_add_sta_cmd_size(mvm), 3043 &cmd, &status); 3044 if (ret) 3045 return ret; 3046 3047 switch (status & IWL_ADD_STA_STATUS_MASK) { 3048 case ADD_STA_SUCCESS: 3049 break; 3050 default: 3051 ret = -EIO; 3052 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 3053 start ? "start" : "stopp", status); 3054 break; 3055 } 3056 3057 return ret; 3058 } 3059 3060 const u8 tid_to_mac80211_ac[] = { 3061 IEEE80211_AC_BE, 3062 IEEE80211_AC_BK, 3063 IEEE80211_AC_BK, 3064 IEEE80211_AC_BE, 3065 IEEE80211_AC_VI, 3066 IEEE80211_AC_VI, 3067 IEEE80211_AC_VO, 3068 IEEE80211_AC_VO, 3069 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 3070 }; 3071 3072 static const u8 tid_to_ucode_ac[] = { 3073 AC_BE, 3074 AC_BK, 3075 AC_BK, 3076 AC_BE, 3077 AC_VI, 3078 AC_VI, 3079 AC_VO, 3080 AC_VO, 3081 }; 3082 3083 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3084 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 3085 { 3086 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3087 struct iwl_mvm_tid_data *tid_data; 3088 u16 normalized_ssn; 3089 u16 txq_id; 3090 int ret; 3091 3092 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 3093 return -EINVAL; 3094 3095 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 3096 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 3097 IWL_ERR(mvm, 3098 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 3099 mvmsta->tid_data[tid].state); 3100 return -ENXIO; 3101 } 3102 3103 lockdep_assert_held(&mvm->mutex); 3104 3105 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 3106 iwl_mvm_has_new_tx_api(mvm)) { 3107 u8 ac = tid_to_mac80211_ac[tid]; 3108 3109 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 3110 if (ret) 3111 return ret; 3112 } 3113 3114 spin_lock_bh(&mvmsta->lock); 3115 3116 /* 3117 * Note the possible cases: 3118 * 1. An enabled TXQ - TXQ needs to become agg'ed 3119 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 3120 * it as reserved 3121 */ 3122 txq_id = mvmsta->tid_data[tid].txq_id; 3123 if (txq_id == IWL_MVM_INVALID_QUEUE) { 3124 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id, 3125 IWL_MVM_DQA_MIN_DATA_QUEUE, 3126 IWL_MVM_DQA_MAX_DATA_QUEUE); 3127 if (ret < 0) { 3128 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 3129 goto out; 3130 } 3131 3132 txq_id = ret; 3133 3134 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 3135 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 3136 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 3137 ret = -ENXIO; 3138 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 3139 tid, IWL_MAX_HW_QUEUES - 1); 3140 goto out; 3141 3142 } else if (unlikely(mvm->queue_info[txq_id].status == 3143 IWL_MVM_QUEUE_SHARED)) { 3144 ret = -ENXIO; 3145 IWL_DEBUG_TX_QUEUES(mvm, 3146 "Can't start tid %d agg on shared queue!\n", 3147 tid); 3148 goto out; 3149 } 3150 3151 IWL_DEBUG_TX_QUEUES(mvm, 3152 "AGG for tid %d will be on queue #%d\n", 3153 tid, txq_id); 3154 3155 tid_data = &mvmsta->tid_data[tid]; 3156 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3157 tid_data->txq_id = txq_id; 3158 *ssn = tid_data->ssn; 3159 3160 IWL_DEBUG_TX_QUEUES(mvm, 3161 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 3162 mvmsta->deflink.sta_id, tid, txq_id, 3163 tid_data->ssn, 3164 tid_data->next_reclaimed); 3165 3166 /* 3167 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3168 * to align the wrap around of ssn so we compare relevant values. 3169 */ 3170 normalized_ssn = tid_data->ssn; 3171 if (mvm->trans->mac_cfg->gen2) 3172 normalized_ssn &= 0xff; 3173 3174 if (normalized_ssn == tid_data->next_reclaimed) { 3175 tid_data->state = IWL_AGG_STARTING; 3176 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 3177 } else { 3178 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 3179 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA; 3180 } 3181 3182 out: 3183 spin_unlock_bh(&mvmsta->lock); 3184 3185 return ret; 3186 } 3187 3188 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3189 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 3190 bool amsdu) 3191 { 3192 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3193 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3194 unsigned int wdg_timeout = 3195 iwl_mvm_get_wd_timeout(mvm, vif); 3196 int queue, ret; 3197 bool alloc_queue = true; 3198 enum iwl_mvm_queue_status queue_status; 3199 u16 ssn; 3200 3201 struct iwl_trans_txq_scd_cfg cfg = { 3202 .sta_id = mvmsta->deflink.sta_id, 3203 .tid = tid, 3204 .frame_limit = buf_size, 3205 .aggregate = true, 3206 }; 3207 3208 /* 3209 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 3210 * manager, so this function should never be called in this case. 3211 */ 3212 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 3213 return -EINVAL; 3214 3215 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 3216 != IWL_MAX_TID_COUNT); 3217 3218 spin_lock_bh(&mvmsta->lock); 3219 ssn = tid_data->ssn; 3220 queue = tid_data->txq_id; 3221 tid_data->state = IWL_AGG_ON; 3222 mvmsta->agg_tids |= BIT(tid); 3223 tid_data->ssn = 0xffff; 3224 tid_data->amsdu_in_ampdu_allowed = amsdu; 3225 spin_unlock_bh(&mvmsta->lock); 3226 3227 if (iwl_mvm_has_new_tx_api(mvm)) { 3228 /* 3229 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 3230 * would have failed, so if we are here there is no need to 3231 * allocate a queue. 3232 * However, if aggregation size is different than the default 3233 * size, the scheduler should be reconfigured. 3234 * We cannot do this with the new TX API, so return unsupported 3235 * for now, until it will be offloaded to firmware.. 3236 * Note that if SCD default value changes - this condition 3237 * should be updated as well. 3238 */ 3239 if (buf_size < IWL_FRAME_LIMIT) 3240 return -EOPNOTSUPP; 3241 3242 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3243 if (ret) 3244 return -EIO; 3245 goto out; 3246 } 3247 3248 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 3249 3250 queue_status = mvm->queue_info[queue].status; 3251 3252 /* Maybe there is no need to even alloc a queue... */ 3253 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 3254 alloc_queue = false; 3255 3256 /* 3257 * Only reconfig the SCD for the queue if the window size has 3258 * changed from current (become smaller) 3259 */ 3260 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 3261 /* 3262 * If reconfiguring an existing queue, it first must be 3263 * drained 3264 */ 3265 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 3266 BIT(queue)); 3267 if (ret) { 3268 IWL_ERR(mvm, 3269 "Error draining queue before reconfig\n"); 3270 return ret; 3271 } 3272 3273 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 3274 mvmsta->deflink.sta_id, tid, 3275 buf_size, ssn); 3276 if (ret) { 3277 IWL_ERR(mvm, 3278 "Error reconfiguring TXQ #%d\n", queue); 3279 return ret; 3280 } 3281 } 3282 3283 if (alloc_queue) 3284 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 3285 &cfg, wdg_timeout); 3286 3287 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 3288 if (queue_status != IWL_MVM_QUEUE_SHARED) { 3289 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3290 if (ret) 3291 return -EIO; 3292 } 3293 3294 /* No need to mark as reserved */ 3295 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 3296 3297 out: 3298 /* 3299 * Even though in theory the peer could have different 3300 * aggregation reorder buffer sizes for different sessions, 3301 * our ucode doesn't allow for that and has a global limit 3302 * for each station. Therefore, use the minimum of all the 3303 * aggregation sessions and our default value. 3304 */ 3305 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize = 3306 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize, 3307 buf_size); 3308 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit = 3309 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize; 3310 3311 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 3312 sta->addr, tid); 3313 3314 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq); 3315 } 3316 3317 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3318 struct iwl_mvm_sta *mvmsta, 3319 struct iwl_mvm_tid_data *tid_data) 3320 { 3321 u16 txq_id = tid_data->txq_id; 3322 3323 lockdep_assert_held(&mvm->mutex); 3324 3325 if (iwl_mvm_has_new_tx_api(mvm)) 3326 return; 3327 3328 /* 3329 * The TXQ is marked as reserved only if no traffic came through yet 3330 * This means no traffic has been sent on this TID (agg'd or not), so 3331 * we no longer have use for the queue. Since it hasn't even been 3332 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3333 * free. 3334 */ 3335 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3336 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3337 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3338 } 3339 } 3340 3341 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3342 struct ieee80211_sta *sta, u16 tid) 3343 { 3344 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3345 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3346 u16 txq_id; 3347 int err; 3348 3349 /* 3350 * If mac80211 is cleaning its state, then say that we finished since 3351 * our state has been cleared anyway. 3352 */ 3353 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3354 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3355 return 0; 3356 } 3357 3358 spin_lock_bh(&mvmsta->lock); 3359 3360 txq_id = tid_data->txq_id; 3361 3362 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3363 mvmsta->deflink.sta_id, tid, txq_id, 3364 tid_data->state); 3365 3366 mvmsta->agg_tids &= ~BIT(tid); 3367 3368 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3369 3370 switch (tid_data->state) { 3371 case IWL_AGG_ON: 3372 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3373 3374 IWL_DEBUG_TX_QUEUES(mvm, 3375 "ssn = %d, next_recl = %d\n", 3376 tid_data->ssn, tid_data->next_reclaimed); 3377 3378 tid_data->ssn = 0xffff; 3379 tid_data->state = IWL_AGG_OFF; 3380 spin_unlock_bh(&mvmsta->lock); 3381 3382 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3383 3384 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3385 return 0; 3386 case IWL_AGG_STARTING: 3387 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3388 /* 3389 * The agg session has been stopped before it was set up. This 3390 * can happen when the AddBA timer times out for example. 3391 */ 3392 3393 /* No barriers since we are under mutex */ 3394 lockdep_assert_held(&mvm->mutex); 3395 3396 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3397 tid_data->state = IWL_AGG_OFF; 3398 err = 0; 3399 break; 3400 default: 3401 IWL_ERR(mvm, 3402 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3403 mvmsta->deflink.sta_id, tid, tid_data->state); 3404 IWL_ERR(mvm, 3405 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3406 err = -EINVAL; 3407 } 3408 3409 spin_unlock_bh(&mvmsta->lock); 3410 3411 return err; 3412 } 3413 3414 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3415 struct ieee80211_sta *sta, u16 tid) 3416 { 3417 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3418 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3419 u16 txq_id; 3420 enum iwl_mvm_agg_state old_state; 3421 3422 /* 3423 * First set the agg state to OFF to avoid calling 3424 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3425 */ 3426 spin_lock_bh(&mvmsta->lock); 3427 txq_id = tid_data->txq_id; 3428 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3429 mvmsta->deflink.sta_id, tid, txq_id, 3430 tid_data->state); 3431 old_state = tid_data->state; 3432 tid_data->state = IWL_AGG_OFF; 3433 mvmsta->agg_tids &= ~BIT(tid); 3434 spin_unlock_bh(&mvmsta->lock); 3435 3436 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3437 3438 if (old_state >= IWL_AGG_ON) { 3439 iwl_mvm_drain_sta(mvm, mvmsta, true); 3440 3441 if (iwl_mvm_has_new_tx_api(mvm)) { 3442 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id, 3443 BIT(tid))) 3444 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3445 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3446 } else { 3447 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id))) 3448 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3449 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3450 } 3451 3452 iwl_mvm_drain_sta(mvm, mvmsta, false); 3453 3454 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3455 } 3456 3457 return 0; 3458 } 3459 3460 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3461 { 3462 int i, max = -1, max_offs = -1; 3463 3464 lockdep_assert_held(&mvm->mutex); 3465 3466 /* Pick the unused key offset with the highest 'deleted' 3467 * counter. Every time a key is deleted, all the counters 3468 * are incremented and the one that was just deleted is 3469 * reset to zero. Thus, the highest counter is the one 3470 * that was deleted longest ago. Pick that one. 3471 */ 3472 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3473 if (test_bit(i, mvm->fw_key_table)) 3474 continue; 3475 if (mvm->fw_key_deleted[i] > max) { 3476 max = mvm->fw_key_deleted[i]; 3477 max_offs = i; 3478 } 3479 } 3480 3481 if (max_offs < 0) 3482 return STA_KEY_IDX_INVALID; 3483 3484 return max_offs; 3485 } 3486 3487 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3488 struct ieee80211_vif *vif, 3489 struct ieee80211_sta *sta) 3490 { 3491 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3492 3493 if (sta) 3494 return iwl_mvm_sta_from_mac80211(sta); 3495 3496 /* 3497 * The device expects GTKs for station interfaces to be 3498 * installed as GTKs for the AP station. If we have no 3499 * station ID, then use AP's station ID. 3500 */ 3501 if (vif->type == NL80211_IFTYPE_STATION && 3502 mvmvif->deflink.ap_sta_id != IWL_INVALID_STA) { 3503 u8 sta_id = mvmvif->deflink.ap_sta_id; 3504 3505 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3506 lockdep_is_held(&mvm->mutex)); 3507 3508 /* 3509 * It is possible that the 'sta' parameter is NULL, 3510 * for example when a GTK is removed - the sta_id will then 3511 * be the AP ID, and no station was passed by mac80211. 3512 */ 3513 if (IS_ERR_OR_NULL(sta)) 3514 return NULL; 3515 3516 return iwl_mvm_sta_from_mac80211(sta); 3517 } 3518 3519 return NULL; 3520 } 3521 3522 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len) 3523 { 3524 int i; 3525 3526 for (i = len - 1; i >= 0; i--) { 3527 if (pn1[i] > pn2[i]) 3528 return 1; 3529 if (pn1[i] < pn2[i]) 3530 return -1; 3531 } 3532 3533 return 0; 3534 } 3535 3536 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3537 u32 sta_id, 3538 struct ieee80211_key_conf *key, bool mcast, 3539 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3540 u8 key_offset, bool mfp) 3541 { 3542 union { 3543 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3544 struct iwl_mvm_add_sta_key_cmd cmd; 3545 } u = {}; 3546 __le16 key_flags; 3547 int ret; 3548 u32 status; 3549 u16 keyidx; 3550 u64 pn = 0; 3551 int i, size; 3552 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3553 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3554 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY, 3555 new_api ? 2 : 1); 3556 3557 if (sta_id == IWL_INVALID_STA) 3558 return -EINVAL; 3559 3560 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3561 STA_KEY_FLG_KEYID_MSK; 3562 key_flags = cpu_to_le16(keyidx); 3563 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3564 3565 if (key->flags & IEEE80211_KEY_FLAG_SPP_AMSDU) 3566 key_flags |= cpu_to_le16(STA_KEY_FLG_AMSDU_SPP); 3567 3568 switch (key->cipher) { 3569 case WLAN_CIPHER_SUITE_TKIP: 3570 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3571 if (api_ver >= 2) { 3572 memcpy((void *)&u.cmd.tx_mic_key, 3573 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3574 IWL_MIC_KEY_SIZE); 3575 3576 memcpy((void *)&u.cmd.rx_mic_key, 3577 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3578 IWL_MIC_KEY_SIZE); 3579 pn = atomic64_read(&key->tx_pn); 3580 3581 } else { 3582 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3583 for (i = 0; i < 5; i++) 3584 u.cmd_v1.tkip_rx_ttak[i] = 3585 cpu_to_le16(tkip_p1k[i]); 3586 } 3587 memcpy(u.cmd.common.key, key->key, key->keylen); 3588 break; 3589 case WLAN_CIPHER_SUITE_CCMP: 3590 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3591 memcpy(u.cmd.common.key, key->key, key->keylen); 3592 if (api_ver >= 2) 3593 pn = atomic64_read(&key->tx_pn); 3594 break; 3595 case WLAN_CIPHER_SUITE_WEP104: 3596 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3597 fallthrough; 3598 case WLAN_CIPHER_SUITE_WEP40: 3599 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3600 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3601 break; 3602 case WLAN_CIPHER_SUITE_GCMP_256: 3603 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3604 fallthrough; 3605 case WLAN_CIPHER_SUITE_GCMP: 3606 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3607 memcpy(u.cmd.common.key, key->key, key->keylen); 3608 if (api_ver >= 2) 3609 pn = atomic64_read(&key->tx_pn); 3610 break; 3611 default: 3612 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3613 memcpy(u.cmd.common.key, key->key, key->keylen); 3614 } 3615 3616 if (mcast) 3617 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3618 if (mfp) 3619 key_flags |= cpu_to_le16(STA_KEY_MFP); 3620 3621 u.cmd.common.key_offset = key_offset; 3622 u.cmd.common.key_flags = key_flags; 3623 u.cmd.common.sta_id = sta_id; 3624 3625 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) 3626 i = 0; 3627 else 3628 i = -1; 3629 3630 for (; i < IEEE80211_NUM_TIDS; i++) { 3631 struct ieee80211_key_seq seq = {}; 3632 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn; 3633 int rx_pn_len = 8; 3634 /* there's a hole at 2/3 in FW format depending on version */ 3635 int hole = api_ver >= 3 ? 0 : 2; 3636 3637 ieee80211_get_key_rx_seq(key, i, &seq); 3638 3639 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { 3640 rx_pn[0] = seq.tkip.iv16; 3641 rx_pn[1] = seq.tkip.iv16 >> 8; 3642 rx_pn[2 + hole] = seq.tkip.iv32; 3643 rx_pn[3 + hole] = seq.tkip.iv32 >> 8; 3644 rx_pn[4 + hole] = seq.tkip.iv32 >> 16; 3645 rx_pn[5 + hole] = seq.tkip.iv32 >> 24; 3646 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) { 3647 rx_pn = seq.hw.seq; 3648 rx_pn_len = seq.hw.seq_len; 3649 } else { 3650 rx_pn[0] = seq.ccmp.pn[0]; 3651 rx_pn[1] = seq.ccmp.pn[1]; 3652 rx_pn[2 + hole] = seq.ccmp.pn[2]; 3653 rx_pn[3 + hole] = seq.ccmp.pn[3]; 3654 rx_pn[4 + hole] = seq.ccmp.pn[4]; 3655 rx_pn[5 + hole] = seq.ccmp.pn[5]; 3656 } 3657 3658 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt, 3659 rx_pn_len) > 0) 3660 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn, 3661 rx_pn_len); 3662 } 3663 3664 if (api_ver >= 2) { 3665 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3666 size = sizeof(u.cmd); 3667 } else { 3668 size = sizeof(u.cmd_v1); 3669 } 3670 3671 status = ADD_STA_SUCCESS; 3672 if (cmd_flags & CMD_ASYNC) 3673 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3674 &u.cmd); 3675 else 3676 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3677 &u.cmd, &status); 3678 3679 switch (status) { 3680 case ADD_STA_SUCCESS: 3681 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3682 break; 3683 default: 3684 ret = -EIO; 3685 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3686 break; 3687 } 3688 3689 return ret; 3690 } 3691 3692 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3693 struct ieee80211_key_conf *keyconf, 3694 u8 sta_id, bool remove_key) 3695 { 3696 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3697 3698 /* verify the key details match the required command's expectations */ 3699 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3700 (keyconf->keyidx != 4 && keyconf->keyidx != 5 && 3701 keyconf->keyidx != 6 && keyconf->keyidx != 7) || 3702 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3703 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3704 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3705 return -EINVAL; 3706 3707 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3708 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3709 return -EINVAL; 3710 3711 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3712 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3713 3714 if (remove_key) { 3715 /* This is a valid situation for IGTK */ 3716 if (sta_id == IWL_INVALID_STA) 3717 return 0; 3718 3719 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3720 } else { 3721 struct ieee80211_key_seq seq; 3722 const u8 *pn; 3723 3724 switch (keyconf->cipher) { 3725 case WLAN_CIPHER_SUITE_AES_CMAC: 3726 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3727 break; 3728 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3729 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3730 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3731 break; 3732 default: 3733 return -EINVAL; 3734 } 3735 3736 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3737 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3738 igtk_cmd.ctrl_flags |= 3739 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3740 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3741 pn = seq.aes_cmac.pn; 3742 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3743 ((u64) pn[4] << 8) | 3744 ((u64) pn[3] << 16) | 3745 ((u64) pn[2] << 24) | 3746 ((u64) pn[1] << 32) | 3747 ((u64) pn[0] << 40)); 3748 } 3749 3750 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n", 3751 remove_key ? "removing" : "installing", 3752 keyconf->keyidx >= 6 ? "B" : "", 3753 keyconf->keyidx, igtk_cmd.sta_id); 3754 3755 if (!iwl_mvm_has_new_rx_api(mvm)) { 3756 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3757 .ctrl_flags = igtk_cmd.ctrl_flags, 3758 .key_id = igtk_cmd.key_id, 3759 .sta_id = igtk_cmd.sta_id, 3760 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3761 }; 3762 3763 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3764 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3765 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3766 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3767 } 3768 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3769 sizeof(igtk_cmd), &igtk_cmd); 3770 } 3771 3772 3773 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3774 struct ieee80211_vif *vif, 3775 struct ieee80211_sta *sta) 3776 { 3777 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3778 3779 if (sta) 3780 return sta->addr; 3781 3782 if (vif->type == NL80211_IFTYPE_STATION && 3783 mvmvif->deflink.ap_sta_id != IWL_INVALID_STA) { 3784 u8 sta_id = mvmvif->deflink.ap_sta_id; 3785 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3786 lockdep_is_held(&mvm->mutex)); 3787 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 3788 return NULL; 3789 3790 return sta->addr; 3791 } 3792 3793 3794 return NULL; 3795 } 3796 3797 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3798 struct ieee80211_vif *vif, 3799 struct ieee80211_sta *sta, 3800 struct ieee80211_key_conf *keyconf, 3801 u8 key_offset, 3802 bool mcast) 3803 { 3804 const u8 *addr; 3805 struct ieee80211_key_seq seq; 3806 u16 p1k[5]; 3807 u32 sta_id; 3808 bool mfp = false; 3809 3810 if (sta) { 3811 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3812 3813 sta_id = mvm_sta->deflink.sta_id; 3814 mfp = sta->mfp; 3815 } else if (vif->type == NL80211_IFTYPE_AP && 3816 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3817 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3818 3819 sta_id = mvmvif->deflink.mcast_sta.sta_id; 3820 } else { 3821 IWL_ERR(mvm, "Failed to find station id\n"); 3822 return -EINVAL; 3823 } 3824 3825 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) { 3826 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3827 if (!addr) { 3828 IWL_ERR(mvm, "Failed to find mac address\n"); 3829 return -EINVAL; 3830 } 3831 3832 /* get phase 1 key from mac80211 */ 3833 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3834 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3835 3836 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3837 seq.tkip.iv32, p1k, 0, key_offset, 3838 mfp); 3839 } 3840 3841 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3842 0, NULL, 0, key_offset, mfp); 3843 } 3844 3845 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3846 struct ieee80211_vif *vif, 3847 struct ieee80211_sta *sta, 3848 struct ieee80211_key_conf *keyconf, 3849 u8 key_offset) 3850 { 3851 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3852 struct iwl_mvm_sta *mvm_sta; 3853 u8 sta_id = IWL_INVALID_STA; 3854 int ret; 3855 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3856 3857 lockdep_assert_held(&mvm->mutex); 3858 3859 if (vif->type != NL80211_IFTYPE_AP || 3860 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3861 /* Get the station id from the mvm local station table */ 3862 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3863 if (!mvm_sta) { 3864 IWL_ERR(mvm, "Failed to find station\n"); 3865 return -EINVAL; 3866 } 3867 sta_id = mvm_sta->deflink.sta_id; 3868 3869 /* 3870 * It is possible that the 'sta' parameter is NULL, and thus 3871 * there is a need to retrieve the sta from the local station 3872 * table. 3873 */ 3874 if (!sta) { 3875 sta = rcu_dereference_protected( 3876 mvm->fw_id_to_mac_id[sta_id], 3877 lockdep_is_held(&mvm->mutex)); 3878 if (IS_ERR_OR_NULL(sta)) { 3879 IWL_ERR(mvm, "Invalid station id\n"); 3880 return -EINVAL; 3881 } 3882 } 3883 3884 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3885 return -EINVAL; 3886 } else { 3887 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3888 3889 sta_id = mvmvif->deflink.mcast_sta.sta_id; 3890 } 3891 3892 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3893 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3894 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3895 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3896 goto end; 3897 } 3898 3899 /* If the key_offset is not pre-assigned, we need to find a 3900 * new offset to use. In normal cases, the offset is not 3901 * pre-assigned, but during HW_RESTART we want to reuse the 3902 * same indices, so we pass them when this function is called. 3903 * 3904 * In D3 entry, we need to hardcoded the indices (because the 3905 * firmware hardcodes the PTK offset to 0). In this case, we 3906 * need to make sure we don't overwrite the hw_key_idx in the 3907 * keyconf structure, because otherwise we cannot configure 3908 * the original ones back when resuming. 3909 */ 3910 if (key_offset == STA_KEY_IDX_INVALID) { 3911 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3912 if (key_offset == STA_KEY_IDX_INVALID) 3913 return -ENOSPC; 3914 keyconf->hw_key_idx = key_offset; 3915 } 3916 3917 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3918 if (ret) 3919 goto end; 3920 3921 /* 3922 * For WEP, the same key is used for multicast and unicast. Upload it 3923 * again, using the same key offset, and now pointing the other one 3924 * to the same key slot (offset). 3925 * If this fails, remove the original as well. 3926 */ 3927 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3928 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3929 sta) { 3930 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3931 key_offset, !mcast); 3932 if (ret) { 3933 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3934 goto end; 3935 } 3936 } 3937 3938 __set_bit(key_offset, mvm->fw_key_table); 3939 3940 end: 3941 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3942 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3943 sta ? sta->addr : zero_addr, ret); 3944 return ret; 3945 } 3946 3947 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3948 struct ieee80211_vif *vif, 3949 struct ieee80211_sta *sta, 3950 struct ieee80211_key_conf *keyconf) 3951 { 3952 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3953 struct iwl_mvm_sta *mvm_sta; 3954 u8 sta_id = IWL_INVALID_STA; 3955 int ret, i; 3956 3957 lockdep_assert_held(&mvm->mutex); 3958 3959 /* Get the station from the mvm local station table */ 3960 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3961 if (mvm_sta) 3962 sta_id = mvm_sta->deflink.sta_id; 3963 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3964 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id; 3965 3966 3967 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3968 keyconf->keyidx, sta_id); 3969 3970 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3971 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3972 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3973 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3974 3975 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3976 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3977 keyconf->hw_key_idx); 3978 return -ENOENT; 3979 } 3980 3981 /* track which key was deleted last */ 3982 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3983 if (mvm->fw_key_deleted[i] < U8_MAX) 3984 mvm->fw_key_deleted[i]++; 3985 } 3986 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3987 3988 if (sta && !mvm_sta) { 3989 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3990 return 0; 3991 } 3992 3993 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3994 if (ret) 3995 return ret; 3996 3997 /* delete WEP key twice to get rid of (now useless) offset */ 3998 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3999 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 4000 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 4001 4002 return ret; 4003 } 4004 4005 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 4006 struct ieee80211_vif *vif, 4007 struct ieee80211_key_conf *keyconf, 4008 struct ieee80211_sta *sta, u32 iv32, 4009 u16 *phase1key) 4010 { 4011 struct iwl_mvm_sta *mvm_sta; 4012 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 4013 bool mfp = sta ? sta->mfp : false; 4014 4015 rcu_read_lock(); 4016 4017 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 4018 if (WARN_ON_ONCE(!mvm_sta)) 4019 goto unlock; 4020 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast, 4021 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 4022 mfp); 4023 4024 unlock: 4025 rcu_read_unlock(); 4026 } 4027 4028 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 4029 struct ieee80211_sta *sta) 4030 { 4031 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 4032 struct iwl_mvm_add_sta_cmd cmd = { 4033 .add_modify = STA_MODE_MODIFY, 4034 .sta_id = mvmsta->deflink.sta_id, 4035 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 4036 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4037 }; 4038 int ret; 4039 4040 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4041 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4042 if (ret) 4043 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4044 } 4045 4046 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 4047 struct ieee80211_sta *sta, 4048 enum ieee80211_frame_release_type reason, 4049 u16 cnt, u16 tids, bool more_data, 4050 bool single_sta_queue) 4051 { 4052 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 4053 struct iwl_mvm_add_sta_cmd cmd = { 4054 .add_modify = STA_MODE_MODIFY, 4055 .sta_id = mvmsta->deflink.sta_id, 4056 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 4057 .sleep_tx_count = cpu_to_le16(cnt), 4058 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4059 }; 4060 int tid, ret; 4061 unsigned long _tids = tids; 4062 4063 /* convert TIDs to ACs - we don't support TSPEC so that's OK 4064 * Note that this field is reserved and unused by firmware not 4065 * supporting GO uAPSD, so it's safe to always do this. 4066 */ 4067 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 4068 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 4069 4070 /* If we're releasing frames from aggregation or dqa queues then check 4071 * if all the queues that we're releasing frames from, combined, have: 4072 * - more frames than the service period, in which case more_data 4073 * needs to be set 4074 * - fewer than 'cnt' frames, in which case we need to adjust the 4075 * firmware command (but do that unconditionally) 4076 */ 4077 if (single_sta_queue) { 4078 int remaining = cnt; 4079 int sleep_tx_count; 4080 4081 spin_lock_bh(&mvmsta->lock); 4082 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 4083 struct iwl_mvm_tid_data *tid_data; 4084 u16 n_queued; 4085 4086 tid_data = &mvmsta->tid_data[tid]; 4087 4088 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 4089 if (n_queued > remaining) { 4090 more_data = true; 4091 remaining = 0; 4092 break; 4093 } 4094 remaining -= n_queued; 4095 } 4096 sleep_tx_count = cnt - remaining; 4097 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 4098 mvmsta->sleep_tx_count = sleep_tx_count; 4099 spin_unlock_bh(&mvmsta->lock); 4100 4101 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 4102 if (WARN_ON(cnt - remaining == 0)) { 4103 ieee80211_sta_eosp(sta); 4104 return; 4105 } 4106 } 4107 4108 /* Note: this is ignored by firmware not supporting GO uAPSD */ 4109 if (more_data) 4110 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 4111 4112 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 4113 mvmsta->next_status_eosp = true; 4114 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 4115 } else { 4116 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 4117 } 4118 4119 /* block the Tx queues until the FW updated the sleep Tx count */ 4120 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 4121 CMD_ASYNC | CMD_BLOCK_TXQS, 4122 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4123 if (ret) 4124 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4125 } 4126 4127 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 4128 struct iwl_rx_cmd_buffer *rxb) 4129 { 4130 struct iwl_rx_packet *pkt = rxb_addr(rxb); 4131 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 4132 struct ieee80211_sta *sta; 4133 u32 sta_id = le32_to_cpu(notif->sta_id); 4134 4135 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations)) 4136 return; 4137 4138 rcu_read_lock(); 4139 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 4140 if (!IS_ERR_OR_NULL(sta)) 4141 ieee80211_sta_eosp(sta); 4142 rcu_read_unlock(); 4143 } 4144 4145 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 4146 struct iwl_mvm_sta *mvmsta, 4147 bool disable) 4148 { 4149 struct iwl_mvm_add_sta_cmd cmd = { 4150 .add_modify = STA_MODE_MODIFY, 4151 .sta_id = mvmsta->deflink.sta_id, 4152 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 4153 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 4154 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4155 }; 4156 int ret; 4157 4158 if (mvm->mld_api_is_used) { 4159 if (!iwl_mvm_has_no_host_disable_tx(mvm)) 4160 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable); 4161 return; 4162 } 4163 4164 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4165 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4166 if (ret) 4167 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4168 } 4169 4170 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 4171 struct ieee80211_sta *sta, 4172 bool disable) 4173 { 4174 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 4175 4176 if (mvm->mld_api_is_used) { 4177 if (!iwl_mvm_has_no_host_disable_tx(mvm)) 4178 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable); 4179 return; 4180 } 4181 4182 spin_lock_bh(&mvm_sta->lock); 4183 4184 if (mvm_sta->disable_tx == disable) { 4185 spin_unlock_bh(&mvm_sta->lock); 4186 return; 4187 } 4188 4189 mvm_sta->disable_tx = disable; 4190 4191 /* 4192 * If sta PS state is handled by mac80211, tell it to start/stop 4193 * queuing tx for this station. 4194 */ 4195 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS)) 4196 ieee80211_sta_block_awake(mvm->hw, sta, disable); 4197 4198 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 4199 4200 spin_unlock_bh(&mvm_sta->lock); 4201 } 4202 4203 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 4204 struct iwl_mvm_vif *mvmvif, 4205 struct iwl_mvm_int_sta *sta, 4206 bool disable) 4207 { 4208 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 4209 struct iwl_mvm_add_sta_cmd cmd = { 4210 .add_modify = STA_MODE_MODIFY, 4211 .sta_id = sta->sta_id, 4212 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 4213 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 4214 .mac_id_n_color = cpu_to_le32(id), 4215 }; 4216 int ret; 4217 4218 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4219 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4220 if (ret) 4221 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4222 } 4223 4224 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 4225 struct iwl_mvm_vif *mvmvif, 4226 bool disable) 4227 { 4228 struct ieee80211_sta *sta; 4229 struct iwl_mvm_sta *mvm_sta; 4230 int i; 4231 4232 if (mvm->mld_api_is_used) { 4233 if (!iwl_mvm_has_no_host_disable_tx(mvm)) 4234 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif, 4235 disable); 4236 return; 4237 } 4238 4239 rcu_read_lock(); 4240 4241 /* Block/unblock all the stations of the given mvmvif */ 4242 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { 4243 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]); 4244 if (IS_ERR_OR_NULL(sta)) 4245 continue; 4246 4247 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 4248 if (mvm_sta->mac_id_n_color != 4249 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 4250 continue; 4251 4252 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 4253 } 4254 4255 rcu_read_unlock(); 4256 4257 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 4258 return; 4259 4260 /* Need to block/unblock also multicast station */ 4261 if (mvmvif->deflink.mcast_sta.sta_id != IWL_INVALID_STA) 4262 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 4263 &mvmvif->deflink.mcast_sta, 4264 disable); 4265 4266 /* 4267 * Only unblock the broadcast station (FW blocks it for immediate 4268 * quiet, not the driver) 4269 */ 4270 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_INVALID_STA) 4271 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 4272 &mvmvif->deflink.bcast_sta, 4273 disable); 4274 } 4275 4276 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 4277 { 4278 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 4279 struct iwl_mvm_sta *mvmsta; 4280 4281 rcu_read_lock(); 4282 4283 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id); 4284 4285 if (mvmsta) 4286 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 4287 4288 rcu_read_unlock(); 4289 } 4290 4291 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 4292 { 4293 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 4294 4295 /* 4296 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 4297 * to align the wrap around of ssn so we compare relevant values. 4298 */ 4299 if (mvm->trans->mac_cfg->gen2) 4300 sn &= 0xff; 4301 4302 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 4303 } 4304 4305 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm, 4306 struct ieee80211_vif *vif, 4307 u32 id) 4308 { 4309 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = { 4310 .id = cpu_to_le32(id), 4311 }; 4312 int ret; 4313 4314 ret = iwl_mvm_send_cmd_pdu(mvm, 4315 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD), 4316 CMD_ASYNC, 4317 sizeof(cancel_channel_switch_cmd), 4318 &cancel_channel_switch_cmd); 4319 if (ret) 4320 IWL_ERR(mvm, "Failed to cancel the channel switch\n"); 4321 } 4322