1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2015, 2018-2022 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <net/mac80211.h> 8 9 #include "mvm.h" 10 #include "sta.h" 11 #include "rs.h" 12 13 /* 14 * New version of ADD_STA_sta command added new fields at the end of the 15 * structure, so sending the size of the relevant API's structure is enough to 16 * support both API versions. 17 */ 18 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 19 { 20 if (iwl_mvm_has_new_rx_api(mvm) || 21 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 22 return sizeof(struct iwl_mvm_add_sta_cmd); 23 else 24 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 25 } 26 27 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 28 enum nl80211_iftype iftype) 29 { 30 int sta_id; 31 u32 reserved_ids = 0; 32 33 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32); 34 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 35 36 lockdep_assert_held(&mvm->mutex); 37 38 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 39 if (iftype != NL80211_IFTYPE_STATION) 40 reserved_ids = BIT(0); 41 42 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 43 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) { 44 if (BIT(sta_id) & reserved_ids) 45 continue; 46 47 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 48 lockdep_is_held(&mvm->mutex))) 49 return sta_id; 50 } 51 return IWL_MVM_INVALID_STA; 52 } 53 54 /* send station add/update command to firmware */ 55 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 56 bool update, unsigned int flags) 57 { 58 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 59 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 60 .sta_id = mvm_sta->sta_id, 61 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 62 .add_modify = update ? 1 : 0, 63 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 64 STA_FLG_MIMO_EN_MSK | 65 STA_FLG_RTS_MIMO_PROT), 66 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 67 }; 68 int ret; 69 u32 status; 70 u32 agg_size = 0, mpdu_dens = 0; 71 72 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 73 add_sta_cmd.station_type = mvm_sta->sta_type; 74 75 if (!update || (flags & STA_MODIFY_QUEUES)) { 76 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 77 78 if (!iwl_mvm_has_new_tx_api(mvm)) { 79 add_sta_cmd.tfd_queue_msk = 80 cpu_to_le32(mvm_sta->tfd_queue_msk); 81 82 if (flags & STA_MODIFY_QUEUES) 83 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 84 } else { 85 WARN_ON(flags & STA_MODIFY_QUEUES); 86 } 87 } 88 89 switch (sta->deflink.bandwidth) { 90 case IEEE80211_STA_RX_BW_320: 91 case IEEE80211_STA_RX_BW_160: 92 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 93 fallthrough; 94 case IEEE80211_STA_RX_BW_80: 95 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 96 fallthrough; 97 case IEEE80211_STA_RX_BW_40: 98 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 99 fallthrough; 100 case IEEE80211_STA_RX_BW_20: 101 if (sta->deflink.ht_cap.ht_supported) 102 add_sta_cmd.station_flags |= 103 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 104 break; 105 } 106 107 switch (sta->deflink.rx_nss) { 108 case 1: 109 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 110 break; 111 case 2: 112 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 113 break; 114 case 3 ... 8: 115 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 116 break; 117 } 118 119 switch (sta->deflink.smps_mode) { 120 case IEEE80211_SMPS_AUTOMATIC: 121 case IEEE80211_SMPS_NUM_MODES: 122 WARN_ON(1); 123 break; 124 case IEEE80211_SMPS_STATIC: 125 /* override NSS */ 126 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 127 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 128 break; 129 case IEEE80211_SMPS_DYNAMIC: 130 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 131 break; 132 case IEEE80211_SMPS_OFF: 133 /* nothing */ 134 break; 135 } 136 137 if (sta->deflink.ht_cap.ht_supported) { 138 add_sta_cmd.station_flags_msk |= 139 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 140 STA_FLG_AGG_MPDU_DENS_MSK); 141 142 mpdu_dens = sta->deflink.ht_cap.ampdu_density; 143 } 144 145 if (mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) { 146 add_sta_cmd.station_flags_msk |= 147 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 148 STA_FLG_AGG_MPDU_DENS_MSK); 149 150 mpdu_dens = le16_get_bits(sta->deflink.he_6ghz_capa.capa, 151 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START); 152 agg_size = le16_get_bits(sta->deflink.he_6ghz_capa.capa, 153 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP); 154 } else if (sta->deflink.vht_cap.vht_supported) { 155 agg_size = sta->deflink.vht_cap.cap & 156 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 157 agg_size >>= 158 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 159 } else if (sta->deflink.ht_cap.ht_supported) { 160 agg_size = sta->deflink.ht_cap.ampdu_factor; 161 } 162 163 /* D6.0 10.12.2 A-MPDU length limit rules 164 * A STA indicates the maximum length of the A-MPDU preEOF padding 165 * that it can receive in an HE PPDU in the Maximum A-MPDU Length 166 * Exponent field in its HT Capabilities, VHT Capabilities, 167 * and HE 6 GHz Band Capabilities elements (if present) and the 168 * Maximum AMPDU Length Exponent Extension field in its HE 169 * Capabilities element 170 */ 171 if (sta->deflink.he_cap.has_he) 172 agg_size += u8_get_bits(sta->deflink.he_cap.he_cap_elem.mac_cap_info[3], 173 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK); 174 175 /* Limit to max A-MPDU supported by FW */ 176 if (agg_size > (STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT)) 177 agg_size = (STA_FLG_MAX_AGG_SIZE_4M >> 178 STA_FLG_MAX_AGG_SIZE_SHIFT); 179 180 add_sta_cmd.station_flags |= 181 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 182 add_sta_cmd.station_flags |= 183 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 184 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 185 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 186 187 if (sta->wme) { 188 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 189 190 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 191 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 192 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 193 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 194 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 195 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 196 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 197 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 198 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 199 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 200 } 201 202 status = ADD_STA_SUCCESS; 203 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 204 iwl_mvm_add_sta_cmd_size(mvm), 205 &add_sta_cmd, &status); 206 if (ret) 207 return ret; 208 209 switch (status & IWL_ADD_STA_STATUS_MASK) { 210 case ADD_STA_SUCCESS: 211 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 212 break; 213 default: 214 ret = -EIO; 215 IWL_ERR(mvm, "ADD_STA failed\n"); 216 break; 217 } 218 219 return ret; 220 } 221 222 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 223 { 224 struct iwl_mvm_baid_data *data = 225 from_timer(data, t, session_timer); 226 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 227 struct iwl_mvm_baid_data *ba_data; 228 struct ieee80211_sta *sta; 229 struct iwl_mvm_sta *mvm_sta; 230 unsigned long timeout; 231 232 rcu_read_lock(); 233 234 ba_data = rcu_dereference(*rcu_ptr); 235 236 if (WARN_ON(!ba_data)) 237 goto unlock; 238 239 if (!ba_data->timeout) 240 goto unlock; 241 242 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 243 if (time_is_after_jiffies(timeout)) { 244 mod_timer(&ba_data->session_timer, timeout); 245 goto unlock; 246 } 247 248 /* Timer expired */ 249 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 250 251 /* 252 * sta should be valid unless the following happens: 253 * The firmware asserts which triggers a reconfig flow, but 254 * the reconfig fails before we set the pointer to sta into 255 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 256 * A-MDPU and hence the timer continues to run. Then, the 257 * timer expires and sta is NULL. 258 */ 259 if (!sta) 260 goto unlock; 261 262 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 263 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 264 sta->addr, ba_data->tid); 265 unlock: 266 rcu_read_unlock(); 267 } 268 269 /* Disable aggregations for a bitmap of TIDs for a given station */ 270 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 271 unsigned long disable_agg_tids, 272 bool remove_queue) 273 { 274 struct iwl_mvm_add_sta_cmd cmd = {}; 275 struct ieee80211_sta *sta; 276 struct iwl_mvm_sta *mvmsta; 277 u32 status; 278 u8 sta_id; 279 280 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 281 return -EINVAL; 282 283 sta_id = mvm->queue_info[queue].ra_sta_id; 284 285 rcu_read_lock(); 286 287 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 288 289 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 290 rcu_read_unlock(); 291 return -EINVAL; 292 } 293 294 mvmsta = iwl_mvm_sta_from_mac80211(sta); 295 296 mvmsta->tid_disable_agg |= disable_agg_tids; 297 298 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 299 cmd.sta_id = mvmsta->sta_id; 300 cmd.add_modify = STA_MODE_MODIFY; 301 cmd.modify_mask = STA_MODIFY_QUEUES; 302 if (disable_agg_tids) 303 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 304 if (remove_queue) 305 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 306 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 307 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 308 309 rcu_read_unlock(); 310 311 /* Notify FW of queue removal from the STA queues */ 312 status = ADD_STA_SUCCESS; 313 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 314 iwl_mvm_add_sta_cmd_size(mvm), 315 &cmd, &status); 316 } 317 318 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 319 int sta_id, u16 *queueptr, u8 tid) 320 { 321 int queue = *queueptr; 322 struct iwl_scd_txq_cfg_cmd cmd = { 323 .scd_queue = queue, 324 .action = SCD_CFG_DISABLE_QUEUE, 325 }; 326 int ret; 327 328 lockdep_assert_held(&mvm->mutex); 329 330 if (iwl_mvm_has_new_tx_api(mvm)) { 331 if (mvm->sta_remove_requires_queue_remove) { 332 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, 333 SCD_QUEUE_CONFIG_CMD); 334 struct iwl_scd_queue_cfg_cmd remove_cmd = { 335 .operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE), 336 .u.remove.tid = cpu_to_le32(tid), 337 .u.remove.sta_mask = cpu_to_le32(BIT(sta_id)), 338 }; 339 340 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, 341 sizeof(remove_cmd), 342 &remove_cmd); 343 } else { 344 ret = 0; 345 } 346 347 iwl_trans_txq_free(mvm->trans, queue); 348 *queueptr = IWL_MVM_INVALID_QUEUE; 349 350 return ret; 351 } 352 353 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 354 return 0; 355 356 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 357 358 cmd.action = mvm->queue_info[queue].tid_bitmap ? 359 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 360 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 361 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 362 363 IWL_DEBUG_TX_QUEUES(mvm, 364 "Disabling TXQ #%d tids=0x%x\n", 365 queue, 366 mvm->queue_info[queue].tid_bitmap); 367 368 /* If the queue is still enabled - nothing left to do in this func */ 369 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 370 return 0; 371 372 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 373 cmd.tid = mvm->queue_info[queue].txq_tid; 374 375 /* Make sure queue info is correct even though we overwrite it */ 376 WARN(mvm->queue_info[queue].tid_bitmap, 377 "TXQ #%d info out-of-sync - tids=0x%x\n", 378 queue, mvm->queue_info[queue].tid_bitmap); 379 380 /* If we are here - the queue is freed and we can zero out these vals */ 381 mvm->queue_info[queue].tid_bitmap = 0; 382 383 if (sta) { 384 struct iwl_mvm_txq *mvmtxq = 385 iwl_mvm_txq_from_tid(sta, tid); 386 387 spin_lock_bh(&mvm->add_stream_lock); 388 list_del_init(&mvmtxq->list); 389 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 390 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 391 spin_unlock_bh(&mvm->add_stream_lock); 392 } 393 394 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 395 mvm->queue_info[queue].reserved = false; 396 397 iwl_trans_txq_disable(mvm->trans, queue, false); 398 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, 399 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 400 401 if (ret) 402 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 403 queue, ret); 404 return ret; 405 } 406 407 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 408 { 409 struct ieee80211_sta *sta; 410 struct iwl_mvm_sta *mvmsta; 411 unsigned long tid_bitmap; 412 unsigned long agg_tids = 0; 413 u8 sta_id; 414 int tid; 415 416 lockdep_assert_held(&mvm->mutex); 417 418 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 419 return -EINVAL; 420 421 sta_id = mvm->queue_info[queue].ra_sta_id; 422 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 423 424 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 425 lockdep_is_held(&mvm->mutex)); 426 427 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 428 return -EINVAL; 429 430 mvmsta = iwl_mvm_sta_from_mac80211(sta); 431 432 spin_lock_bh(&mvmsta->lock); 433 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 434 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 435 agg_tids |= BIT(tid); 436 } 437 spin_unlock_bh(&mvmsta->lock); 438 439 return agg_tids; 440 } 441 442 /* 443 * Remove a queue from a station's resources. 444 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 445 * doesn't disable the queue 446 */ 447 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 448 { 449 struct ieee80211_sta *sta; 450 struct iwl_mvm_sta *mvmsta; 451 unsigned long tid_bitmap; 452 unsigned long disable_agg_tids = 0; 453 u8 sta_id; 454 int tid; 455 456 lockdep_assert_held(&mvm->mutex); 457 458 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 459 return -EINVAL; 460 461 sta_id = mvm->queue_info[queue].ra_sta_id; 462 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 463 464 rcu_read_lock(); 465 466 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 467 468 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 469 rcu_read_unlock(); 470 return 0; 471 } 472 473 mvmsta = iwl_mvm_sta_from_mac80211(sta); 474 475 spin_lock_bh(&mvmsta->lock); 476 /* Unmap MAC queues and TIDs from this queue */ 477 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 478 struct iwl_mvm_txq *mvmtxq = 479 iwl_mvm_txq_from_tid(sta, tid); 480 481 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 482 disable_agg_tids |= BIT(tid); 483 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 484 485 spin_lock_bh(&mvm->add_stream_lock); 486 list_del_init(&mvmtxq->list); 487 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 488 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 489 spin_unlock_bh(&mvm->add_stream_lock); 490 } 491 492 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 493 spin_unlock_bh(&mvmsta->lock); 494 495 rcu_read_unlock(); 496 497 /* 498 * The TX path may have been using this TXQ_ID from the tid_data, 499 * so make sure it's no longer running so that we can safely reuse 500 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 501 * above, but nothing guarantees we've stopped using them. Thus, 502 * without this, we could get to iwl_mvm_disable_txq() and remove 503 * the queue while still sending frames to it. 504 */ 505 synchronize_net(); 506 507 return disable_agg_tids; 508 } 509 510 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 511 struct ieee80211_sta *old_sta, 512 u8 new_sta_id) 513 { 514 struct iwl_mvm_sta *mvmsta; 515 u8 sta_id, tid; 516 unsigned long disable_agg_tids = 0; 517 bool same_sta; 518 u16 queue_tmp = queue; 519 int ret; 520 521 lockdep_assert_held(&mvm->mutex); 522 523 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 524 return -EINVAL; 525 526 sta_id = mvm->queue_info[queue].ra_sta_id; 527 tid = mvm->queue_info[queue].txq_tid; 528 529 same_sta = sta_id == new_sta_id; 530 531 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 532 if (WARN_ON(!mvmsta)) 533 return -EINVAL; 534 535 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 536 /* Disable the queue */ 537 if (disable_agg_tids) 538 iwl_mvm_invalidate_sta_queue(mvm, queue, 539 disable_agg_tids, false); 540 541 ret = iwl_mvm_disable_txq(mvm, old_sta, sta_id, &queue_tmp, tid); 542 if (ret) { 543 IWL_ERR(mvm, 544 "Failed to free inactive queue %d (ret=%d)\n", 545 queue, ret); 546 547 return ret; 548 } 549 550 /* If TXQ is allocated to another STA, update removal in FW */ 551 if (!same_sta) 552 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 553 554 return 0; 555 } 556 557 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 558 unsigned long tfd_queue_mask, u8 ac) 559 { 560 int queue = 0; 561 u8 ac_to_queue[IEEE80211_NUM_ACS]; 562 int i; 563 564 /* 565 * This protects us against grabbing a queue that's being reconfigured 566 * by the inactivity checker. 567 */ 568 lockdep_assert_held(&mvm->mutex); 569 570 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 571 return -EINVAL; 572 573 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 574 575 /* See what ACs the existing queues for this STA have */ 576 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 577 /* Only DATA queues can be shared */ 578 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 579 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 580 continue; 581 582 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 583 } 584 585 /* 586 * The queue to share is chosen only from DATA queues as follows (in 587 * descending priority): 588 * 1. An AC_BE queue 589 * 2. Same AC queue 590 * 3. Highest AC queue that is lower than new AC 591 * 4. Any existing AC (there always is at least 1 DATA queue) 592 */ 593 594 /* Priority 1: An AC_BE queue */ 595 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 596 queue = ac_to_queue[IEEE80211_AC_BE]; 597 /* Priority 2: Same AC queue */ 598 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 599 queue = ac_to_queue[ac]; 600 /* Priority 3a: If new AC is VO and VI exists - use VI */ 601 else if (ac == IEEE80211_AC_VO && 602 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 603 queue = ac_to_queue[IEEE80211_AC_VI]; 604 /* Priority 3b: No BE so only AC less than the new one is BK */ 605 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 606 queue = ac_to_queue[IEEE80211_AC_BK]; 607 /* Priority 4a: No BE nor BK - use VI if exists */ 608 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 609 queue = ac_to_queue[IEEE80211_AC_VI]; 610 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 611 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 612 queue = ac_to_queue[IEEE80211_AC_VO]; 613 614 /* Make sure queue found (or not) is legal */ 615 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 616 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 617 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 618 IWL_ERR(mvm, "No DATA queues available to share\n"); 619 return -ENOSPC; 620 } 621 622 return queue; 623 } 624 625 /* Re-configure the SCD for a queue that has already been configured */ 626 static int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, 627 int sta_id, int tid, int frame_limit, u16 ssn) 628 { 629 struct iwl_scd_txq_cfg_cmd cmd = { 630 .scd_queue = queue, 631 .action = SCD_CFG_ENABLE_QUEUE, 632 .window = frame_limit, 633 .sta_id = sta_id, 634 .ssn = cpu_to_le16(ssn), 635 .tx_fifo = fifo, 636 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 637 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE), 638 .tid = tid, 639 }; 640 int ret; 641 642 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 643 return -EINVAL; 644 645 if (WARN(mvm->queue_info[queue].tid_bitmap == 0, 646 "Trying to reconfig unallocated queue %d\n", queue)) 647 return -ENXIO; 648 649 IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue); 650 651 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 652 WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n", 653 queue, fifo, ret); 654 655 return ret; 656 } 657 658 /* 659 * If a given queue has a higher AC than the TID stream that is being compared 660 * to, the queue needs to be redirected to the lower AC. This function does that 661 * in such a case, otherwise - if no redirection required - it does nothing, 662 * unless the %force param is true. 663 */ 664 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 665 int ac, int ssn, unsigned int wdg_timeout, 666 bool force, struct iwl_mvm_txq *txq) 667 { 668 struct iwl_scd_txq_cfg_cmd cmd = { 669 .scd_queue = queue, 670 .action = SCD_CFG_DISABLE_QUEUE, 671 }; 672 bool shared_queue; 673 int ret; 674 675 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 676 return -EINVAL; 677 678 /* 679 * If the AC is lower than current one - FIFO needs to be redirected to 680 * the lowest one of the streams in the queue. Check if this is needed 681 * here. 682 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 683 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 684 * we need to check if the numerical value of X is LARGER than of Y. 685 */ 686 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 687 IWL_DEBUG_TX_QUEUES(mvm, 688 "No redirection needed on TXQ #%d\n", 689 queue); 690 return 0; 691 } 692 693 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 694 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 695 cmd.tid = mvm->queue_info[queue].txq_tid; 696 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 697 698 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 699 queue, iwl_mvm_ac_to_tx_fifo[ac]); 700 701 /* Stop the queue and wait for it to empty */ 702 set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state); 703 704 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 705 if (ret) { 706 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 707 queue); 708 ret = -EIO; 709 goto out; 710 } 711 712 /* Before redirecting the queue we need to de-activate it */ 713 iwl_trans_txq_disable(mvm->trans, queue, false); 714 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 715 if (ret) 716 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 717 ret); 718 719 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 720 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 721 722 /* Update the TID "owner" of the queue */ 723 mvm->queue_info[queue].txq_tid = tid; 724 725 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 726 727 /* Redirect to lower AC */ 728 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 729 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 730 731 /* Update AC marking of the queue */ 732 mvm->queue_info[queue].mac80211_ac = ac; 733 734 /* 735 * Mark queue as shared in transport if shared 736 * Note this has to be done after queue enablement because enablement 737 * can also set this value, and there is no indication there to shared 738 * queues 739 */ 740 if (shared_queue) 741 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 742 743 out: 744 /* Continue using the queue */ 745 clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state); 746 747 return ret; 748 } 749 750 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 751 u8 minq, u8 maxq) 752 { 753 int i; 754 755 lockdep_assert_held(&mvm->mutex); 756 757 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues, 758 "max queue %d >= num_of_queues (%d)", maxq, 759 mvm->trans->trans_cfg->base_params->num_of_queues)) 760 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1; 761 762 /* This should not be hit with new TX path */ 763 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 764 return -ENOSPC; 765 766 /* Start by looking for a free queue */ 767 for (i = minq; i <= maxq; i++) 768 if (mvm->queue_info[i].tid_bitmap == 0 && 769 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 770 return i; 771 772 return -ENOSPC; 773 } 774 775 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 776 u8 sta_id, u8 tid, unsigned int timeout) 777 { 778 int queue, size; 779 780 if (tid == IWL_MAX_TID_COUNT) { 781 tid = IWL_MGMT_TID; 782 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 783 mvm->trans->cfg->min_txq_size); 784 } else { 785 struct ieee80211_sta *sta; 786 787 rcu_read_lock(); 788 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 789 790 /* this queue isn't used for traffic (cab_queue) */ 791 if (IS_ERR_OR_NULL(sta)) { 792 size = IWL_MGMT_QUEUE_SIZE; 793 } else if (sta->deflink.he_cap.has_he) { 794 /* support for 256 ba size */ 795 size = IWL_DEFAULT_QUEUE_SIZE_HE; 796 } else { 797 size = IWL_DEFAULT_QUEUE_SIZE; 798 } 799 800 rcu_read_unlock(); 801 } 802 803 /* take the min with bc tbl entries allowed */ 804 size = min_t(u32, size, mvm->trans->txqs.bc_tbl_size / sizeof(u16)); 805 806 /* size needs to be power of 2 values for calculating read/write pointers */ 807 size = rounddown_pow_of_two(size); 808 809 do { 810 queue = iwl_trans_txq_alloc(mvm->trans, 0, BIT(sta_id), 811 tid, size, timeout); 812 813 if (queue < 0) 814 IWL_DEBUG_TX_QUEUES(mvm, 815 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n", 816 size, sta_id, tid, queue); 817 size /= 2; 818 } while (queue < 0 && size >= 16); 819 820 if (queue < 0) 821 return queue; 822 823 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 824 queue, sta_id, tid); 825 826 return queue; 827 } 828 829 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 830 struct ieee80211_sta *sta, u8 ac, 831 int tid) 832 { 833 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 834 struct iwl_mvm_txq *mvmtxq = 835 iwl_mvm_txq_from_tid(sta, tid); 836 unsigned int wdg_timeout = 837 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 838 int queue = -1; 839 840 lockdep_assert_held(&mvm->mutex); 841 842 IWL_DEBUG_TX_QUEUES(mvm, 843 "Allocating queue for sta %d on tid %d\n", 844 mvmsta->sta_id, tid); 845 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 846 if (queue < 0) 847 return queue; 848 849 mvmtxq->txq_id = queue; 850 mvm->tvqm_info[queue].txq_tid = tid; 851 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 852 853 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 854 855 spin_lock_bh(&mvmsta->lock); 856 mvmsta->tid_data[tid].txq_id = queue; 857 spin_unlock_bh(&mvmsta->lock); 858 859 return 0; 860 } 861 862 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 863 struct ieee80211_sta *sta, 864 int queue, u8 sta_id, u8 tid) 865 { 866 bool enable_queue = true; 867 868 /* Make sure this TID isn't already enabled */ 869 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 870 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 871 queue, tid); 872 return false; 873 } 874 875 /* Update mappings and refcounts */ 876 if (mvm->queue_info[queue].tid_bitmap) 877 enable_queue = false; 878 879 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 880 mvm->queue_info[queue].ra_sta_id = sta_id; 881 882 if (enable_queue) { 883 if (tid != IWL_MAX_TID_COUNT) 884 mvm->queue_info[queue].mac80211_ac = 885 tid_to_mac80211_ac[tid]; 886 else 887 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 888 889 mvm->queue_info[queue].txq_tid = tid; 890 } 891 892 if (sta) { 893 struct iwl_mvm_txq *mvmtxq = 894 iwl_mvm_txq_from_tid(sta, tid); 895 896 mvmtxq->txq_id = queue; 897 } 898 899 IWL_DEBUG_TX_QUEUES(mvm, 900 "Enabling TXQ #%d tids=0x%x\n", 901 queue, mvm->queue_info[queue].tid_bitmap); 902 903 return enable_queue; 904 } 905 906 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 907 int queue, u16 ssn, 908 const struct iwl_trans_txq_scd_cfg *cfg, 909 unsigned int wdg_timeout) 910 { 911 struct iwl_scd_txq_cfg_cmd cmd = { 912 .scd_queue = queue, 913 .action = SCD_CFG_ENABLE_QUEUE, 914 .window = cfg->frame_limit, 915 .sta_id = cfg->sta_id, 916 .ssn = cpu_to_le16(ssn), 917 .tx_fifo = cfg->fifo, 918 .aggregate = cfg->aggregate, 919 .tid = cfg->tid, 920 }; 921 bool inc_ssn; 922 923 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 924 return false; 925 926 /* Send the enabling command if we need to */ 927 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 928 return false; 929 930 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 931 NULL, wdg_timeout); 932 if (inc_ssn) 933 le16_add_cpu(&cmd.ssn, 1); 934 935 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 936 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 937 938 return inc_ssn; 939 } 940 941 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 942 { 943 struct iwl_scd_txq_cfg_cmd cmd = { 944 .scd_queue = queue, 945 .action = SCD_CFG_UPDATE_QUEUE_TID, 946 }; 947 int tid; 948 unsigned long tid_bitmap; 949 int ret; 950 951 lockdep_assert_held(&mvm->mutex); 952 953 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 954 return; 955 956 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 957 958 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 959 return; 960 961 /* Find any TID for queue */ 962 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 963 cmd.tid = tid; 964 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 965 966 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 967 if (ret) { 968 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 969 queue, ret); 970 return; 971 } 972 973 mvm->queue_info[queue].txq_tid = tid; 974 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 975 queue, tid); 976 } 977 978 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 979 { 980 struct ieee80211_sta *sta; 981 struct iwl_mvm_sta *mvmsta; 982 u8 sta_id; 983 int tid = -1; 984 unsigned long tid_bitmap; 985 unsigned int wdg_timeout; 986 int ssn; 987 int ret = true; 988 989 /* queue sharing is disabled on new TX path */ 990 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 991 return; 992 993 lockdep_assert_held(&mvm->mutex); 994 995 sta_id = mvm->queue_info[queue].ra_sta_id; 996 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 997 998 /* Find TID for queue, and make sure it is the only one on the queue */ 999 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1000 if (tid_bitmap != BIT(tid)) { 1001 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 1002 queue, tid_bitmap); 1003 return; 1004 } 1005 1006 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 1007 tid); 1008 1009 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1010 lockdep_is_held(&mvm->mutex)); 1011 1012 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1013 return; 1014 1015 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1016 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1017 1018 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1019 1020 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 1021 tid_to_mac80211_ac[tid], ssn, 1022 wdg_timeout, true, 1023 iwl_mvm_txq_from_tid(sta, tid)); 1024 if (ret) { 1025 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 1026 return; 1027 } 1028 1029 /* If aggs should be turned back on - do it */ 1030 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1031 struct iwl_mvm_add_sta_cmd cmd = {0}; 1032 1033 mvmsta->tid_disable_agg &= ~BIT(tid); 1034 1035 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1036 cmd.sta_id = mvmsta->sta_id; 1037 cmd.add_modify = STA_MODE_MODIFY; 1038 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1039 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1040 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1041 1042 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1043 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1044 if (!ret) { 1045 IWL_DEBUG_TX_QUEUES(mvm, 1046 "TXQ #%d is now aggregated again\n", 1047 queue); 1048 1049 /* Mark queue intenally as aggregating again */ 1050 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1051 } 1052 } 1053 1054 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1055 } 1056 1057 /* 1058 * Remove inactive TIDs of a given queue. 1059 * If all queue TIDs are inactive - mark the queue as inactive 1060 * If only some the queue TIDs are inactive - unmap them from the queue 1061 * 1062 * Returns %true if all TIDs were removed and the queue could be reused. 1063 */ 1064 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1065 struct iwl_mvm_sta *mvmsta, int queue, 1066 unsigned long tid_bitmap, 1067 unsigned long *unshare_queues, 1068 unsigned long *changetid_queues) 1069 { 1070 unsigned int tid; 1071 1072 lockdep_assert_held(&mvmsta->lock); 1073 lockdep_assert_held(&mvm->mutex); 1074 1075 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1076 return false; 1077 1078 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1079 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1080 /* If some TFDs are still queued - don't mark TID as inactive */ 1081 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1082 tid_bitmap &= ~BIT(tid); 1083 1084 /* Don't mark as inactive any TID that has an active BA */ 1085 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1086 tid_bitmap &= ~BIT(tid); 1087 } 1088 1089 /* If all TIDs in the queue are inactive - return it can be reused */ 1090 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1091 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1092 return true; 1093 } 1094 1095 /* 1096 * If we are here, this is a shared queue and not all TIDs timed-out. 1097 * Remove the ones that did. 1098 */ 1099 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1100 u16 q_tid_bitmap; 1101 1102 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1103 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1104 1105 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1106 1107 /* 1108 * We need to take into account a situation in which a TXQ was 1109 * allocated to TID x, and then turned shared by adding TIDs y 1110 * and z. If TID x becomes inactive and is removed from the TXQ, 1111 * ownership must be given to one of the remaining TIDs. 1112 * This is mainly because if TID x continues - a new queue can't 1113 * be allocated for it as long as it is an owner of another TXQ. 1114 * 1115 * Mark this queue in the right bitmap, we'll send the command 1116 * to the firmware later. 1117 */ 1118 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1119 set_bit(queue, changetid_queues); 1120 1121 IWL_DEBUG_TX_QUEUES(mvm, 1122 "Removing inactive TID %d from shared Q:%d\n", 1123 tid, queue); 1124 } 1125 1126 IWL_DEBUG_TX_QUEUES(mvm, 1127 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1128 mvm->queue_info[queue].tid_bitmap); 1129 1130 /* 1131 * There may be different TIDs with the same mac queues, so make 1132 * sure all TIDs have existing corresponding mac queues enabled 1133 */ 1134 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1135 1136 /* If the queue is marked as shared - "unshare" it */ 1137 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1138 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1139 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1140 queue); 1141 set_bit(queue, unshare_queues); 1142 } 1143 1144 return false; 1145 } 1146 1147 /* 1148 * Check for inactivity - this includes checking if any queue 1149 * can be unshared and finding one (and only one) that can be 1150 * reused. 1151 * This function is also invoked as a sort of clean-up task, 1152 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1153 * 1154 * Returns the queue number, or -ENOSPC. 1155 */ 1156 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1157 { 1158 unsigned long now = jiffies; 1159 unsigned long unshare_queues = 0; 1160 unsigned long changetid_queues = 0; 1161 int i, ret, free_queue = -ENOSPC; 1162 struct ieee80211_sta *queue_owner = NULL; 1163 1164 lockdep_assert_held(&mvm->mutex); 1165 1166 if (iwl_mvm_has_new_tx_api(mvm)) 1167 return -ENOSPC; 1168 1169 rcu_read_lock(); 1170 1171 /* we skip the CMD queue below by starting at 1 */ 1172 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1173 1174 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1175 struct ieee80211_sta *sta; 1176 struct iwl_mvm_sta *mvmsta; 1177 u8 sta_id; 1178 int tid; 1179 unsigned long inactive_tid_bitmap = 0; 1180 unsigned long queue_tid_bitmap; 1181 1182 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1183 if (!queue_tid_bitmap) 1184 continue; 1185 1186 /* If TXQ isn't in active use anyway - nothing to do here... */ 1187 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1188 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1189 continue; 1190 1191 /* Check to see if there are inactive TIDs on this queue */ 1192 for_each_set_bit(tid, &queue_tid_bitmap, 1193 IWL_MAX_TID_COUNT + 1) { 1194 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1195 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1196 continue; 1197 1198 inactive_tid_bitmap |= BIT(tid); 1199 } 1200 1201 /* If all TIDs are active - finish check on this queue */ 1202 if (!inactive_tid_bitmap) 1203 continue; 1204 1205 /* 1206 * If we are here - the queue hadn't been served recently and is 1207 * in use 1208 */ 1209 1210 sta_id = mvm->queue_info[i].ra_sta_id; 1211 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1212 1213 /* 1214 * If the STA doesn't exist anymore, it isn't an error. It could 1215 * be that it was removed since getting the queues, and in this 1216 * case it should've inactivated its queues anyway. 1217 */ 1218 if (IS_ERR_OR_NULL(sta)) 1219 continue; 1220 1221 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1222 1223 spin_lock_bh(&mvmsta->lock); 1224 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1225 inactive_tid_bitmap, 1226 &unshare_queues, 1227 &changetid_queues); 1228 if (ret && free_queue < 0) { 1229 queue_owner = sta; 1230 free_queue = i; 1231 } 1232 /* only unlock sta lock - we still need the queue info lock */ 1233 spin_unlock_bh(&mvmsta->lock); 1234 } 1235 1236 1237 /* Reconfigure queues requiring reconfiguation */ 1238 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1239 iwl_mvm_unshare_queue(mvm, i); 1240 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1241 iwl_mvm_change_queue_tid(mvm, i); 1242 1243 rcu_read_unlock(); 1244 1245 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1246 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1247 alloc_for_sta); 1248 if (ret) 1249 return ret; 1250 } 1251 1252 return free_queue; 1253 } 1254 1255 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1256 struct ieee80211_sta *sta, u8 ac, int tid) 1257 { 1258 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1259 struct iwl_trans_txq_scd_cfg cfg = { 1260 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1261 .sta_id = mvmsta->sta_id, 1262 .tid = tid, 1263 .frame_limit = IWL_FRAME_LIMIT, 1264 }; 1265 unsigned int wdg_timeout = 1266 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1267 int queue = -1; 1268 u16 queue_tmp; 1269 unsigned long disable_agg_tids = 0; 1270 enum iwl_mvm_agg_state queue_state; 1271 bool shared_queue = false, inc_ssn; 1272 int ssn; 1273 unsigned long tfd_queue_mask; 1274 int ret; 1275 1276 lockdep_assert_held(&mvm->mutex); 1277 1278 if (iwl_mvm_has_new_tx_api(mvm)) 1279 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1280 1281 spin_lock_bh(&mvmsta->lock); 1282 tfd_queue_mask = mvmsta->tfd_queue_msk; 1283 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1284 spin_unlock_bh(&mvmsta->lock); 1285 1286 if (tid == IWL_MAX_TID_COUNT) { 1287 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1288 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1289 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1290 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1291 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1292 queue); 1293 1294 /* If no such queue is found, we'll use a DATA queue instead */ 1295 } 1296 1297 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1298 (mvm->queue_info[mvmsta->reserved_queue].status == 1299 IWL_MVM_QUEUE_RESERVED)) { 1300 queue = mvmsta->reserved_queue; 1301 mvm->queue_info[queue].reserved = true; 1302 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1303 } 1304 1305 if (queue < 0) 1306 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1307 IWL_MVM_DQA_MIN_DATA_QUEUE, 1308 IWL_MVM_DQA_MAX_DATA_QUEUE); 1309 if (queue < 0) { 1310 /* try harder - perhaps kill an inactive queue */ 1311 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1312 } 1313 1314 /* No free queue - we'll have to share */ 1315 if (queue <= 0) { 1316 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1317 if (queue > 0) { 1318 shared_queue = true; 1319 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1320 } 1321 } 1322 1323 /* 1324 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1325 * to make sure no one else takes it. 1326 * This will allow avoiding re-acquiring the lock at the end of the 1327 * configuration. On error we'll mark it back as free. 1328 */ 1329 if (queue > 0 && !shared_queue) 1330 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1331 1332 /* This shouldn't happen - out of queues */ 1333 if (WARN_ON(queue <= 0)) { 1334 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1335 tid, cfg.sta_id); 1336 return queue; 1337 } 1338 1339 /* 1340 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1341 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1342 * as aggregatable. 1343 * Mark all DATA queues as allowing to be aggregated at some point 1344 */ 1345 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1346 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1347 1348 IWL_DEBUG_TX_QUEUES(mvm, 1349 "Allocating %squeue #%d to sta %d on tid %d\n", 1350 shared_queue ? "shared " : "", queue, 1351 mvmsta->sta_id, tid); 1352 1353 if (shared_queue) { 1354 /* Disable any open aggs on this queue */ 1355 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1356 1357 if (disable_agg_tids) { 1358 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1359 queue); 1360 iwl_mvm_invalidate_sta_queue(mvm, queue, 1361 disable_agg_tids, false); 1362 } 1363 } 1364 1365 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1366 1367 /* 1368 * Mark queue as shared in transport if shared 1369 * Note this has to be done after queue enablement because enablement 1370 * can also set this value, and there is no indication there to shared 1371 * queues 1372 */ 1373 if (shared_queue) 1374 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1375 1376 spin_lock_bh(&mvmsta->lock); 1377 /* 1378 * This looks racy, but it is not. We have only one packet for 1379 * this ra/tid in our Tx path since we stop the Qdisc when we 1380 * need to allocate a new TFD queue. 1381 */ 1382 if (inc_ssn) { 1383 mvmsta->tid_data[tid].seq_number += 0x10; 1384 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1385 } 1386 mvmsta->tid_data[tid].txq_id = queue; 1387 mvmsta->tfd_queue_msk |= BIT(queue); 1388 queue_state = mvmsta->tid_data[tid].state; 1389 1390 if (mvmsta->reserved_queue == queue) 1391 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1392 spin_unlock_bh(&mvmsta->lock); 1393 1394 if (!shared_queue) { 1395 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1396 if (ret) 1397 goto out_err; 1398 1399 /* If we need to re-enable aggregations... */ 1400 if (queue_state == IWL_AGG_ON) { 1401 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1402 if (ret) 1403 goto out_err; 1404 } 1405 } else { 1406 /* Redirect queue, if needed */ 1407 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1408 wdg_timeout, false, 1409 iwl_mvm_txq_from_tid(sta, tid)); 1410 if (ret) 1411 goto out_err; 1412 } 1413 1414 return 0; 1415 1416 out_err: 1417 queue_tmp = queue; 1418 iwl_mvm_disable_txq(mvm, sta, mvmsta->sta_id, &queue_tmp, tid); 1419 1420 return ret; 1421 } 1422 1423 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1424 { 1425 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1426 add_stream_wk); 1427 1428 mutex_lock(&mvm->mutex); 1429 1430 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1431 1432 while (!list_empty(&mvm->add_stream_txqs)) { 1433 struct iwl_mvm_txq *mvmtxq; 1434 struct ieee80211_txq *txq; 1435 u8 tid; 1436 1437 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1438 struct iwl_mvm_txq, list); 1439 1440 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1441 drv_priv); 1442 tid = txq->tid; 1443 if (tid == IEEE80211_NUM_TIDS) 1444 tid = IWL_MAX_TID_COUNT; 1445 1446 /* 1447 * We can't really do much here, but if this fails we can't 1448 * transmit anyway - so just don't transmit the frame etc. 1449 * and let them back up ... we've tried our best to allocate 1450 * a queue in the function itself. 1451 */ 1452 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1453 spin_lock_bh(&mvm->add_stream_lock); 1454 list_del_init(&mvmtxq->list); 1455 spin_unlock_bh(&mvm->add_stream_lock); 1456 continue; 1457 } 1458 1459 /* now we're ready, any remaining races/concurrency will be 1460 * handled in iwl_mvm_mac_itxq_xmit() 1461 */ 1462 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 1463 1464 local_bh_disable(); 1465 spin_lock(&mvm->add_stream_lock); 1466 list_del_init(&mvmtxq->list); 1467 spin_unlock(&mvm->add_stream_lock); 1468 1469 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1470 local_bh_enable(); 1471 } 1472 1473 mutex_unlock(&mvm->mutex); 1474 } 1475 1476 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1477 struct ieee80211_sta *sta, 1478 enum nl80211_iftype vif_type) 1479 { 1480 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1481 int queue; 1482 1483 /* queue reserving is disabled on new TX path */ 1484 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1485 return 0; 1486 1487 /* run the general cleanup/unsharing of queues */ 1488 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1489 1490 /* Make sure we have free resources for this STA */ 1491 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1492 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1493 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1494 IWL_MVM_QUEUE_FREE)) 1495 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1496 else 1497 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1498 IWL_MVM_DQA_MIN_DATA_QUEUE, 1499 IWL_MVM_DQA_MAX_DATA_QUEUE); 1500 if (queue < 0) { 1501 /* try again - this time kick out a queue if needed */ 1502 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1503 if (queue < 0) { 1504 IWL_ERR(mvm, "No available queues for new station\n"); 1505 return -ENOSPC; 1506 } 1507 } 1508 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1509 1510 mvmsta->reserved_queue = queue; 1511 1512 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1513 queue, mvmsta->sta_id); 1514 1515 return 0; 1516 } 1517 1518 /* 1519 * In DQA mode, after a HW restart the queues should be allocated as before, in 1520 * order to avoid race conditions when there are shared queues. This function 1521 * does the re-mapping and queue allocation. 1522 * 1523 * Note that re-enabling aggregations isn't done in this function. 1524 */ 1525 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1526 struct ieee80211_sta *sta) 1527 { 1528 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1529 unsigned int wdg = 1530 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1531 int i; 1532 struct iwl_trans_txq_scd_cfg cfg = { 1533 .sta_id = mvm_sta->sta_id, 1534 .frame_limit = IWL_FRAME_LIMIT, 1535 }; 1536 1537 /* Make sure reserved queue is still marked as such (if allocated) */ 1538 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1539 mvm->queue_info[mvm_sta->reserved_queue].status = 1540 IWL_MVM_QUEUE_RESERVED; 1541 1542 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1543 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1544 int txq_id = tid_data->txq_id; 1545 int ac; 1546 1547 if (txq_id == IWL_MVM_INVALID_QUEUE) 1548 continue; 1549 1550 ac = tid_to_mac80211_ac[i]; 1551 1552 if (iwl_mvm_has_new_tx_api(mvm)) { 1553 IWL_DEBUG_TX_QUEUES(mvm, 1554 "Re-mapping sta %d tid %d\n", 1555 mvm_sta->sta_id, i); 1556 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1557 i, wdg); 1558 /* 1559 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1560 * to try again later, we have no other good way of 1561 * failing here 1562 */ 1563 if (txq_id < 0) 1564 txq_id = IWL_MVM_INVALID_QUEUE; 1565 tid_data->txq_id = txq_id; 1566 1567 /* 1568 * Since we don't set the seq number after reset, and HW 1569 * sets it now, FW reset will cause the seq num to start 1570 * at 0 again, so driver will need to update it 1571 * internally as well, so it keeps in sync with real val 1572 */ 1573 tid_data->seq_number = 0; 1574 } else { 1575 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1576 1577 cfg.tid = i; 1578 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1579 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1580 txq_id == 1581 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1582 1583 IWL_DEBUG_TX_QUEUES(mvm, 1584 "Re-mapping sta %d tid %d to queue %d\n", 1585 mvm_sta->sta_id, i, txq_id); 1586 1587 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1588 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1589 } 1590 } 1591 } 1592 1593 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1594 struct iwl_mvm_int_sta *sta, 1595 const u8 *addr, 1596 u16 mac_id, u16 color) 1597 { 1598 struct iwl_mvm_add_sta_cmd cmd; 1599 int ret; 1600 u32 status = ADD_STA_SUCCESS; 1601 1602 lockdep_assert_held(&mvm->mutex); 1603 1604 memset(&cmd, 0, sizeof(cmd)); 1605 cmd.sta_id = sta->sta_id; 1606 1607 if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12 && 1608 sta->type == IWL_STA_AUX_ACTIVITY) 1609 cmd.mac_id_n_color = cpu_to_le32(mac_id); 1610 else 1611 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1612 color)); 1613 1614 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1615 cmd.station_type = sta->type; 1616 1617 if (!iwl_mvm_has_new_tx_api(mvm)) 1618 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1619 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1620 1621 if (addr) 1622 memcpy(cmd.addr, addr, ETH_ALEN); 1623 1624 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1625 iwl_mvm_add_sta_cmd_size(mvm), 1626 &cmd, &status); 1627 if (ret) 1628 return ret; 1629 1630 switch (status & IWL_ADD_STA_STATUS_MASK) { 1631 case ADD_STA_SUCCESS: 1632 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1633 return 0; 1634 default: 1635 ret = -EIO; 1636 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1637 status); 1638 break; 1639 } 1640 return ret; 1641 } 1642 1643 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1644 struct ieee80211_vif *vif, 1645 struct ieee80211_sta *sta) 1646 { 1647 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1648 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1649 struct iwl_mvm_rxq_dup_data *dup_data; 1650 int i, ret, sta_id; 1651 bool sta_update = false; 1652 unsigned int sta_flags = 0; 1653 1654 lockdep_assert_held(&mvm->mutex); 1655 1656 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1657 sta_id = iwl_mvm_find_free_sta_id(mvm, 1658 ieee80211_vif_type_p2p(vif)); 1659 else 1660 sta_id = mvm_sta->sta_id; 1661 1662 if (sta_id == IWL_MVM_INVALID_STA) 1663 return -ENOSPC; 1664 1665 spin_lock_init(&mvm_sta->lock); 1666 1667 /* if this is a HW restart re-alloc existing queues */ 1668 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1669 struct iwl_mvm_int_sta tmp_sta = { 1670 .sta_id = sta_id, 1671 .type = mvm_sta->sta_type, 1672 }; 1673 1674 /* 1675 * First add an empty station since allocating 1676 * a queue requires a valid station 1677 */ 1678 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1679 mvmvif->id, mvmvif->color); 1680 if (ret) 1681 goto err; 1682 1683 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1684 sta_update = true; 1685 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1686 goto update_fw; 1687 } 1688 1689 mvm_sta->sta_id = sta_id; 1690 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1691 mvmvif->color); 1692 mvm_sta->vif = vif; 1693 if (!mvm->trans->trans_cfg->gen2) 1694 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1695 else 1696 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1697 mvm_sta->tx_protection = 0; 1698 mvm_sta->tt_tx_protection = false; 1699 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1700 1701 /* HW restart, don't assume the memory has been zeroed */ 1702 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1703 mvm_sta->tfd_queue_msk = 0; 1704 1705 /* for HW restart - reset everything but the sequence number */ 1706 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1707 u16 seq = mvm_sta->tid_data[i].seq_number; 1708 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1709 mvm_sta->tid_data[i].seq_number = seq; 1710 1711 /* 1712 * Mark all queues for this STA as unallocated and defer TX 1713 * frames until the queue is allocated 1714 */ 1715 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1716 } 1717 1718 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1719 struct iwl_mvm_txq *mvmtxq = 1720 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1721 1722 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1723 INIT_LIST_HEAD(&mvmtxq->list); 1724 atomic_set(&mvmtxq->tx_request, 0); 1725 } 1726 1727 mvm_sta->agg_tids = 0; 1728 1729 if (iwl_mvm_has_new_rx_api(mvm) && 1730 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1731 int q; 1732 1733 dup_data = kcalloc(mvm->trans->num_rx_queues, 1734 sizeof(*dup_data), GFP_KERNEL); 1735 if (!dup_data) 1736 return -ENOMEM; 1737 /* 1738 * Initialize all the last_seq values to 0xffff which can never 1739 * compare equal to the frame's seq_ctrl in the check in 1740 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1741 * number and fragmented packets don't reach that function. 1742 * 1743 * This thus allows receiving a packet with seqno 0 and the 1744 * retry bit set as the very first packet on a new TID. 1745 */ 1746 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1747 memset(dup_data[q].last_seq, 0xff, 1748 sizeof(dup_data[q].last_seq)); 1749 mvm_sta->dup_data = dup_data; 1750 } 1751 1752 if (!iwl_mvm_has_new_tx_api(mvm)) { 1753 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1754 ieee80211_vif_type_p2p(vif)); 1755 if (ret) 1756 goto err; 1757 } 1758 1759 /* 1760 * if rs is registered with mac80211, then "add station" will be handled 1761 * via the corresponding ops, otherwise need to notify rate scaling here 1762 */ 1763 if (iwl_mvm_has_tlc_offload(mvm)) 1764 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1765 else 1766 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1767 1768 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1769 1770 update_fw: 1771 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1772 if (ret) 1773 goto err; 1774 1775 if (vif->type == NL80211_IFTYPE_STATION) { 1776 if (!sta->tdls) { 1777 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1778 mvmvif->ap_sta_id = sta_id; 1779 } else { 1780 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1781 } 1782 } 1783 1784 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1785 1786 return 0; 1787 1788 err: 1789 return ret; 1790 } 1791 1792 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1793 bool drain) 1794 { 1795 struct iwl_mvm_add_sta_cmd cmd = {}; 1796 int ret; 1797 u32 status; 1798 1799 lockdep_assert_held(&mvm->mutex); 1800 1801 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1802 cmd.sta_id = mvmsta->sta_id; 1803 cmd.add_modify = STA_MODE_MODIFY; 1804 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1805 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1806 1807 status = ADD_STA_SUCCESS; 1808 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1809 iwl_mvm_add_sta_cmd_size(mvm), 1810 &cmd, &status); 1811 if (ret) 1812 return ret; 1813 1814 switch (status & IWL_ADD_STA_STATUS_MASK) { 1815 case ADD_STA_SUCCESS: 1816 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1817 mvmsta->sta_id); 1818 break; 1819 default: 1820 ret = -EIO; 1821 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1822 mvmsta->sta_id); 1823 break; 1824 } 1825 1826 return ret; 1827 } 1828 1829 /* 1830 * Remove a station from the FW table. Before sending the command to remove 1831 * the station validate that the station is indeed known to the driver (sanity 1832 * only). 1833 */ 1834 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1835 { 1836 struct ieee80211_sta *sta; 1837 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1838 .sta_id = sta_id, 1839 }; 1840 int ret; 1841 1842 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1843 lockdep_is_held(&mvm->mutex)); 1844 1845 /* Note: internal stations are marked as error values */ 1846 if (!sta) { 1847 IWL_ERR(mvm, "Invalid station id\n"); 1848 return -EINVAL; 1849 } 1850 1851 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1852 sizeof(rm_sta_cmd), &rm_sta_cmd); 1853 if (ret) { 1854 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1855 return ret; 1856 } 1857 1858 return 0; 1859 } 1860 1861 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1862 struct ieee80211_vif *vif, 1863 struct ieee80211_sta *sta) 1864 { 1865 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1866 int i; 1867 1868 lockdep_assert_held(&mvm->mutex); 1869 1870 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1871 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1872 continue; 1873 1874 iwl_mvm_disable_txq(mvm, sta, mvm_sta->sta_id, 1875 &mvm_sta->tid_data[i].txq_id, i); 1876 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1877 } 1878 1879 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1880 struct iwl_mvm_txq *mvmtxq = 1881 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1882 1883 spin_lock_bh(&mvm->add_stream_lock); 1884 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1885 list_del_init(&mvmtxq->list); 1886 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state); 1887 spin_unlock_bh(&mvm->add_stream_lock); 1888 } 1889 } 1890 1891 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1892 struct iwl_mvm_sta *mvm_sta) 1893 { 1894 int i; 1895 1896 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1897 u16 txq_id; 1898 int ret; 1899 1900 spin_lock_bh(&mvm_sta->lock); 1901 txq_id = mvm_sta->tid_data[i].txq_id; 1902 spin_unlock_bh(&mvm_sta->lock); 1903 1904 if (txq_id == IWL_MVM_INVALID_QUEUE) 1905 continue; 1906 1907 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1908 if (ret) 1909 return ret; 1910 } 1911 1912 return 0; 1913 } 1914 1915 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1916 struct ieee80211_vif *vif, 1917 struct ieee80211_sta *sta) 1918 { 1919 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1920 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1921 u8 sta_id = mvm_sta->sta_id; 1922 int ret; 1923 1924 lockdep_assert_held(&mvm->mutex); 1925 1926 if (iwl_mvm_has_new_rx_api(mvm)) 1927 kfree(mvm_sta->dup_data); 1928 1929 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1930 if (ret) 1931 return ret; 1932 1933 /* flush its queues here since we are freeing mvm_sta */ 1934 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false); 1935 if (ret) 1936 return ret; 1937 if (iwl_mvm_has_new_tx_api(mvm)) { 1938 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1939 } else { 1940 u32 q_mask = mvm_sta->tfd_queue_msk; 1941 1942 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1943 q_mask); 1944 } 1945 if (ret) 1946 return ret; 1947 1948 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1949 1950 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1951 1952 /* If there is a TXQ still marked as reserved - free it */ 1953 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1954 u8 reserved_txq = mvm_sta->reserved_queue; 1955 enum iwl_mvm_queue_status *status; 1956 1957 /* 1958 * If no traffic has gone through the reserved TXQ - it 1959 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1960 * should be manually marked as free again 1961 */ 1962 status = &mvm->queue_info[reserved_txq].status; 1963 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1964 (*status != IWL_MVM_QUEUE_FREE), 1965 "sta_id %d reserved txq %d status %d", 1966 sta_id, reserved_txq, *status)) 1967 return -EINVAL; 1968 1969 *status = IWL_MVM_QUEUE_FREE; 1970 } 1971 1972 if (vif->type == NL80211_IFTYPE_STATION && 1973 mvmvif->ap_sta_id == sta_id) { 1974 /* if associated - we can't remove the AP STA now */ 1975 if (vif->cfg.assoc) 1976 return ret; 1977 1978 /* first remove remaining keys */ 1979 iwl_mvm_sec_key_remove_ap(mvm, vif); 1980 1981 /* unassoc - go ahead - remove the AP STA now */ 1982 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1983 } 1984 1985 /* 1986 * This shouldn't happen - the TDLS channel switch should be canceled 1987 * before the STA is removed. 1988 */ 1989 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1990 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1991 cancel_delayed_work(&mvm->tdls_cs.dwork); 1992 } 1993 1994 /* 1995 * Make sure that the tx response code sees the station as -EBUSY and 1996 * calls the drain worker. 1997 */ 1998 spin_lock_bh(&mvm_sta->lock); 1999 spin_unlock_bh(&mvm_sta->lock); 2000 2001 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 2002 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 2003 2004 return ret; 2005 } 2006 2007 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 2008 struct ieee80211_vif *vif, 2009 u8 sta_id) 2010 { 2011 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 2012 2013 lockdep_assert_held(&mvm->mutex); 2014 2015 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 2016 return ret; 2017 } 2018 2019 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 2020 struct iwl_mvm_int_sta *sta, 2021 u32 qmask, enum nl80211_iftype iftype, 2022 enum iwl_sta_type type) 2023 { 2024 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 2025 sta->sta_id == IWL_MVM_INVALID_STA) { 2026 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 2027 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 2028 return -ENOSPC; 2029 } 2030 2031 sta->tfd_queue_msk = qmask; 2032 sta->type = type; 2033 2034 /* put a non-NULL value so iterating over the stations won't stop */ 2035 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 2036 return 0; 2037 } 2038 2039 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 2040 { 2041 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 2042 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 2043 sta->sta_id = IWL_MVM_INVALID_STA; 2044 } 2045 2046 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 2047 u8 sta_id, u8 fifo) 2048 { 2049 unsigned int wdg_timeout = 2050 mvm->trans->trans_cfg->base_params->wd_timeout; 2051 struct iwl_trans_txq_scd_cfg cfg = { 2052 .fifo = fifo, 2053 .sta_id = sta_id, 2054 .tid = IWL_MAX_TID_COUNT, 2055 .aggregate = false, 2056 .frame_limit = IWL_FRAME_LIMIT, 2057 }; 2058 2059 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2060 2061 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2062 } 2063 2064 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 2065 { 2066 unsigned int wdg_timeout = 2067 mvm->trans->trans_cfg->base_params->wd_timeout; 2068 2069 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2070 2071 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 2072 wdg_timeout); 2073 } 2074 2075 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2076 int maccolor, u8 *addr, 2077 struct iwl_mvm_int_sta *sta, 2078 u16 *queue, int fifo) 2079 { 2080 int ret; 2081 2082 /* Map queue to fifo - needs to happen before adding station */ 2083 if (!iwl_mvm_has_new_tx_api(mvm)) 2084 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2085 2086 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor); 2087 if (ret) { 2088 if (!iwl_mvm_has_new_tx_api(mvm)) 2089 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue, 2090 IWL_MAX_TID_COUNT); 2091 return ret; 2092 } 2093 2094 /* 2095 * For 22000 firmware and on we cannot add queue to a station unknown 2096 * to firmware so enable queue here - after the station was added 2097 */ 2098 if (iwl_mvm_has_new_tx_api(mvm)) { 2099 int txq; 2100 2101 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2102 if (txq < 0) { 2103 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2104 return txq; 2105 } 2106 2107 *queue = txq; 2108 } 2109 2110 return 0; 2111 } 2112 2113 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id) 2114 { 2115 int ret; 2116 2117 lockdep_assert_held(&mvm->mutex); 2118 2119 /* Allocate aux station and assign to it the aux queue */ 2120 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2121 NL80211_IFTYPE_UNSPECIFIED, 2122 IWL_STA_AUX_ACTIVITY); 2123 if (ret) 2124 return ret; 2125 2126 /* 2127 * In CDB NICs we need to specify which lmac to use for aux activity 2128 * using the mac_id argument place to send lmac_id to the function 2129 */ 2130 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL, 2131 &mvm->aux_sta, &mvm->aux_queue, 2132 IWL_MVM_TX_FIFO_MCAST); 2133 if (ret) { 2134 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2135 return ret; 2136 } 2137 2138 return 0; 2139 } 2140 2141 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2142 { 2143 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2144 2145 lockdep_assert_held(&mvm->mutex); 2146 2147 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2148 NULL, &mvm->snif_sta, 2149 &mvm->snif_queue, 2150 IWL_MVM_TX_FIFO_BE); 2151 } 2152 2153 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2154 { 2155 int ret; 2156 2157 lockdep_assert_held(&mvm->mutex); 2158 2159 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA)) 2160 return -EINVAL; 2161 2162 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id, 2163 &mvm->snif_queue, IWL_MAX_TID_COUNT); 2164 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2165 if (ret) 2166 IWL_WARN(mvm, "Failed sending remove station\n"); 2167 2168 return ret; 2169 } 2170 2171 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2172 { 2173 int ret; 2174 2175 lockdep_assert_held(&mvm->mutex); 2176 2177 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA)) 2178 return -EINVAL; 2179 2180 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id, 2181 &mvm->aux_queue, IWL_MAX_TID_COUNT); 2182 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2183 if (ret) 2184 IWL_WARN(mvm, "Failed sending remove station\n"); 2185 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2186 2187 return ret; 2188 } 2189 2190 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2191 { 2192 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2193 } 2194 2195 /* 2196 * Send the add station command for the vif's broadcast station. 2197 * Assumes that the station was already allocated. 2198 * 2199 * @mvm: the mvm component 2200 * @vif: the interface to which the broadcast station is added 2201 * @bsta: the broadcast station to add. 2202 */ 2203 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2204 { 2205 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2206 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2207 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2208 const u8 *baddr = _baddr; 2209 int queue; 2210 int ret; 2211 unsigned int wdg_timeout = 2212 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2213 struct iwl_trans_txq_scd_cfg cfg = { 2214 .fifo = IWL_MVM_TX_FIFO_VO, 2215 .sta_id = mvmvif->bcast_sta.sta_id, 2216 .tid = IWL_MAX_TID_COUNT, 2217 .aggregate = false, 2218 .frame_limit = IWL_FRAME_LIMIT, 2219 }; 2220 2221 lockdep_assert_held(&mvm->mutex); 2222 2223 if (!iwl_mvm_has_new_tx_api(mvm)) { 2224 if (vif->type == NL80211_IFTYPE_AP || 2225 vif->type == NL80211_IFTYPE_ADHOC) { 2226 queue = mvm->probe_queue; 2227 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2228 queue = mvm->p2p_dev_queue; 2229 } else { 2230 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2231 return -EINVAL; 2232 } 2233 2234 bsta->tfd_queue_msk |= BIT(queue); 2235 2236 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2237 } 2238 2239 if (vif->type == NL80211_IFTYPE_ADHOC) 2240 baddr = vif->bss_conf.bssid; 2241 2242 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2243 return -ENOSPC; 2244 2245 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2246 mvmvif->id, mvmvif->color); 2247 if (ret) 2248 return ret; 2249 2250 /* 2251 * For 22000 firmware and on we cannot add queue to a station unknown 2252 * to firmware so enable queue here - after the station was added 2253 */ 2254 if (iwl_mvm_has_new_tx_api(mvm)) { 2255 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2256 IWL_MAX_TID_COUNT, 2257 wdg_timeout); 2258 if (queue < 0) { 2259 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2260 return queue; 2261 } 2262 2263 if (vif->type == NL80211_IFTYPE_AP || 2264 vif->type == NL80211_IFTYPE_ADHOC) 2265 mvm->probe_queue = queue; 2266 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2267 mvm->p2p_dev_queue = queue; 2268 } 2269 2270 return 0; 2271 } 2272 2273 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2274 struct ieee80211_vif *vif) 2275 { 2276 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2277 u16 *queueptr, queue; 2278 2279 lockdep_assert_held(&mvm->mutex); 2280 2281 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true); 2282 2283 switch (vif->type) { 2284 case NL80211_IFTYPE_AP: 2285 case NL80211_IFTYPE_ADHOC: 2286 queueptr = &mvm->probe_queue; 2287 break; 2288 case NL80211_IFTYPE_P2P_DEVICE: 2289 queueptr = &mvm->p2p_dev_queue; 2290 break; 2291 default: 2292 WARN(1, "Can't free bcast queue on vif type %d\n", 2293 vif->type); 2294 return; 2295 } 2296 2297 queue = *queueptr; 2298 iwl_mvm_disable_txq(mvm, NULL, mvmvif->bcast_sta.sta_id, 2299 queueptr, IWL_MAX_TID_COUNT); 2300 if (iwl_mvm_has_new_tx_api(mvm)) 2301 return; 2302 2303 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2304 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2305 } 2306 2307 /* Send the FW a request to remove the station from it's internal data 2308 * structures, but DO NOT remove the entry from the local data structures. */ 2309 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2310 { 2311 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2312 int ret; 2313 2314 lockdep_assert_held(&mvm->mutex); 2315 2316 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2317 2318 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2319 if (ret) 2320 IWL_WARN(mvm, "Failed sending remove station\n"); 2321 return ret; 2322 } 2323 2324 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2325 { 2326 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2327 2328 lockdep_assert_held(&mvm->mutex); 2329 2330 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2331 ieee80211_vif_type_p2p(vif), 2332 IWL_STA_GENERAL_PURPOSE); 2333 } 2334 2335 /* Allocate a new station entry for the broadcast station to the given vif, 2336 * and send it to the FW. 2337 * Note that each P2P mac should have its own broadcast station. 2338 * 2339 * @mvm: the mvm component 2340 * @vif: the interface to which the broadcast station is added 2341 * @bsta: the broadcast station to add. */ 2342 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2343 { 2344 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2345 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2346 int ret; 2347 2348 lockdep_assert_held(&mvm->mutex); 2349 2350 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2351 if (ret) 2352 return ret; 2353 2354 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2355 2356 if (ret) 2357 iwl_mvm_dealloc_int_sta(mvm, bsta); 2358 2359 return ret; 2360 } 2361 2362 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2363 { 2364 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2365 2366 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2367 } 2368 2369 /* 2370 * Send the FW a request to remove the station from it's internal data 2371 * structures, and in addition remove it from the local data structure. 2372 */ 2373 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2374 { 2375 int ret; 2376 2377 lockdep_assert_held(&mvm->mutex); 2378 2379 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2380 2381 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2382 2383 return ret; 2384 } 2385 2386 /* 2387 * Allocate a new station entry for the multicast station to the given vif, 2388 * and send it to the FW. 2389 * Note that each AP/GO mac should have its own multicast station. 2390 * 2391 * @mvm: the mvm component 2392 * @vif: the interface to which the multicast station is added 2393 */ 2394 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2395 { 2396 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2397 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2398 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2399 const u8 *maddr = _maddr; 2400 struct iwl_trans_txq_scd_cfg cfg = { 2401 .fifo = vif->type == NL80211_IFTYPE_AP ? 2402 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2403 .sta_id = msta->sta_id, 2404 .tid = 0, 2405 .aggregate = false, 2406 .frame_limit = IWL_FRAME_LIMIT, 2407 }; 2408 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2409 int ret; 2410 2411 lockdep_assert_held(&mvm->mutex); 2412 2413 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2414 vif->type != NL80211_IFTYPE_ADHOC)) 2415 return -ENOTSUPP; 2416 2417 /* 2418 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2419 * invalid, so make sure we use the queue we want. 2420 * Note that this is done here as we want to avoid making DQA 2421 * changes in mac80211 layer. 2422 */ 2423 if (vif->type == NL80211_IFTYPE_ADHOC) 2424 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2425 2426 /* 2427 * While in previous FWs we had to exclude cab queue from TFD queue 2428 * mask, now it is needed as any other queue. 2429 */ 2430 if (!iwl_mvm_has_new_tx_api(mvm) && 2431 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2432 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2433 timeout); 2434 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2435 } 2436 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2437 mvmvif->id, mvmvif->color); 2438 if (ret) 2439 goto err; 2440 2441 /* 2442 * Enable cab queue after the ADD_STA command is sent. 2443 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2444 * command with unknown station id, and for FW that doesn't support 2445 * station API since the cab queue is not included in the 2446 * tfd_queue_mask. 2447 */ 2448 if (iwl_mvm_has_new_tx_api(mvm)) { 2449 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2450 0, 2451 timeout); 2452 if (queue < 0) { 2453 ret = queue; 2454 goto err; 2455 } 2456 mvmvif->cab_queue = queue; 2457 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2458 IWL_UCODE_TLV_API_STA_TYPE)) 2459 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2460 timeout); 2461 2462 return 0; 2463 err: 2464 iwl_mvm_dealloc_int_sta(mvm, msta); 2465 return ret; 2466 } 2467 2468 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2469 struct ieee80211_key_conf *keyconf, 2470 bool mcast) 2471 { 2472 union { 2473 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2474 struct iwl_mvm_add_sta_key_cmd cmd; 2475 } u = {}; 2476 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2477 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2478 __le16 key_flags; 2479 int ret, size; 2480 u32 status; 2481 2482 /* This is a valid situation for GTK removal */ 2483 if (sta_id == IWL_MVM_INVALID_STA) 2484 return 0; 2485 2486 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2487 STA_KEY_FLG_KEYID_MSK); 2488 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2489 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2490 2491 if (mcast) 2492 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2493 2494 /* 2495 * The fields assigned here are in the same location at the start 2496 * of the command, so we can do this union trick. 2497 */ 2498 u.cmd.common.key_flags = key_flags; 2499 u.cmd.common.key_offset = keyconf->hw_key_idx; 2500 u.cmd.common.sta_id = sta_id; 2501 2502 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2503 2504 status = ADD_STA_SUCCESS; 2505 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2506 &status); 2507 2508 switch (status) { 2509 case ADD_STA_SUCCESS: 2510 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2511 break; 2512 default: 2513 ret = -EIO; 2514 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2515 break; 2516 } 2517 2518 return ret; 2519 } 2520 2521 /* 2522 * Send the FW a request to remove the station from it's internal data 2523 * structures, and in addition remove it from the local data structure. 2524 */ 2525 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2526 { 2527 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2528 int ret; 2529 2530 lockdep_assert_held(&mvm->mutex); 2531 2532 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true); 2533 2534 iwl_mvm_disable_txq(mvm, NULL, mvmvif->mcast_sta.sta_id, 2535 &mvmvif->cab_queue, 0); 2536 2537 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2538 if (ret) 2539 IWL_WARN(mvm, "Failed sending remove station\n"); 2540 2541 return ret; 2542 } 2543 2544 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2545 { 2546 struct iwl_mvm_delba_data notif = { 2547 .baid = baid, 2548 }; 2549 2550 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true, 2551 ¬if, sizeof(notif)); 2552 }; 2553 2554 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2555 struct iwl_mvm_baid_data *data) 2556 { 2557 int i; 2558 2559 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2560 2561 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2562 int j; 2563 struct iwl_mvm_reorder_buffer *reorder_buf = 2564 &data->reorder_buf[i]; 2565 struct iwl_mvm_reorder_buf_entry *entries = 2566 &data->entries[i * data->entries_per_queue]; 2567 2568 spin_lock_bh(&reorder_buf->lock); 2569 if (likely(!reorder_buf->num_stored)) { 2570 spin_unlock_bh(&reorder_buf->lock); 2571 continue; 2572 } 2573 2574 /* 2575 * This shouldn't happen in regular DELBA since the internal 2576 * delBA notification should trigger a release of all frames in 2577 * the reorder buffer. 2578 */ 2579 WARN_ON(1); 2580 2581 for (j = 0; j < reorder_buf->buf_size; j++) 2582 __skb_queue_purge(&entries[j].e.frames); 2583 /* 2584 * Prevent timer re-arm. This prevents a very far fetched case 2585 * where we timed out on the notification. There may be prior 2586 * RX frames pending in the RX queue before the notification 2587 * that might get processed between now and the actual deletion 2588 * and we would re-arm the timer although we are deleting the 2589 * reorder buffer. 2590 */ 2591 reorder_buf->removed = true; 2592 spin_unlock_bh(&reorder_buf->lock); 2593 del_timer_sync(&reorder_buf->reorder_timer); 2594 } 2595 } 2596 2597 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2598 struct iwl_mvm_baid_data *data, 2599 u16 ssn, u16 buf_size) 2600 { 2601 int i; 2602 2603 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2604 struct iwl_mvm_reorder_buffer *reorder_buf = 2605 &data->reorder_buf[i]; 2606 struct iwl_mvm_reorder_buf_entry *entries = 2607 &data->entries[i * data->entries_per_queue]; 2608 int j; 2609 2610 reorder_buf->num_stored = 0; 2611 reorder_buf->head_sn = ssn; 2612 reorder_buf->buf_size = buf_size; 2613 /* rx reorder timer */ 2614 timer_setup(&reorder_buf->reorder_timer, 2615 iwl_mvm_reorder_timer_expired, 0); 2616 spin_lock_init(&reorder_buf->lock); 2617 reorder_buf->mvm = mvm; 2618 reorder_buf->queue = i; 2619 reorder_buf->valid = false; 2620 for (j = 0; j < reorder_buf->buf_size; j++) 2621 __skb_queue_head_init(&entries[j].e.frames); 2622 } 2623 } 2624 2625 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm, 2626 struct iwl_mvm_sta *mvm_sta, 2627 bool start, int tid, u16 ssn, 2628 u16 buf_size) 2629 { 2630 struct iwl_mvm_add_sta_cmd cmd = { 2631 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 2632 .sta_id = mvm_sta->sta_id, 2633 .add_modify = STA_MODE_MODIFY, 2634 }; 2635 u32 status; 2636 int ret; 2637 2638 if (start) { 2639 cmd.add_immediate_ba_tid = tid; 2640 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2641 cmd.rx_ba_window = cpu_to_le16(buf_size); 2642 cmd.modify_mask = STA_MODIFY_ADD_BA_TID; 2643 } else { 2644 cmd.remove_immediate_ba_tid = tid; 2645 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID; 2646 } 2647 2648 status = ADD_STA_SUCCESS; 2649 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2650 iwl_mvm_add_sta_cmd_size(mvm), 2651 &cmd, &status); 2652 if (ret) 2653 return ret; 2654 2655 switch (status & IWL_ADD_STA_STATUS_MASK) { 2656 case ADD_STA_SUCCESS: 2657 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2658 start ? "start" : "stopp"); 2659 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) && 2660 !(status & IWL_ADD_STA_BAID_VALID_MASK))) 2661 return -EINVAL; 2662 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK); 2663 case ADD_STA_IMMEDIATE_BA_FAILURE: 2664 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2665 return -ENOSPC; 2666 default: 2667 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2668 start ? "start" : "stopp", status); 2669 return -EIO; 2670 } 2671 } 2672 2673 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm, 2674 struct iwl_mvm_sta *mvm_sta, 2675 bool start, int tid, u16 ssn, 2676 u16 buf_size, int baid) 2677 { 2678 struct iwl_rx_baid_cfg_cmd cmd = { 2679 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) : 2680 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE), 2681 }; 2682 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD); 2683 int ret; 2684 2685 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid)); 2686 2687 if (start) { 2688 cmd.alloc.sta_id_mask = cpu_to_le32(BIT(mvm_sta->sta_id)); 2689 cmd.alloc.tid = tid; 2690 cmd.alloc.ssn = cpu_to_le16(ssn); 2691 cmd.alloc.win_size = cpu_to_le16(buf_size); 2692 baid = -EIO; 2693 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 1) == 1) { 2694 cmd.remove_v1.baid = cpu_to_le32(baid); 2695 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove)); 2696 } else { 2697 cmd.remove.sta_id_mask = cpu_to_le32(BIT(mvm_sta->sta_id)); 2698 cmd.remove.tid = cpu_to_le32(tid); 2699 } 2700 2701 ret = iwl_mvm_send_cmd_pdu_status(mvm, cmd_id, sizeof(cmd), 2702 &cmd, &baid); 2703 if (ret) 2704 return ret; 2705 2706 if (!start) { 2707 /* ignore firmware baid on remove */ 2708 baid = 0; 2709 } 2710 2711 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2712 start ? "start" : "stopp"); 2713 2714 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map)) 2715 return -EINVAL; 2716 2717 return baid; 2718 } 2719 2720 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvm_sta, 2721 bool start, int tid, u16 ssn, u16 buf_size, 2722 int baid) 2723 { 2724 if (fw_has_capa(&mvm->fw->ucode_capa, 2725 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT)) 2726 return iwl_mvm_fw_baid_op_cmd(mvm, mvm_sta, start, 2727 tid, ssn, buf_size, baid); 2728 2729 return iwl_mvm_fw_baid_op_sta(mvm, mvm_sta, start, 2730 tid, ssn, buf_size); 2731 } 2732 2733 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2734 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2735 { 2736 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2737 struct iwl_mvm_baid_data *baid_data = NULL; 2738 int ret, baid; 2739 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID : 2740 IWL_MAX_BAID_OLD; 2741 2742 lockdep_assert_held(&mvm->mutex); 2743 2744 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) { 2745 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2746 return -ENOSPC; 2747 } 2748 2749 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2750 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2751 2752 /* sparse doesn't like the __align() so don't check */ 2753 #ifndef __CHECKER__ 2754 /* 2755 * The division below will be OK if either the cache line size 2756 * can be divided by the entry size (ALIGN will round up) or if 2757 * if the entry size can be divided by the cache line size, in 2758 * which case the ALIGN() will do nothing. 2759 */ 2760 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2761 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2762 #endif 2763 2764 /* 2765 * Upward align the reorder buffer size to fill an entire cache 2766 * line for each queue, to avoid sharing cache lines between 2767 * different queues. 2768 */ 2769 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2770 2771 /* 2772 * Allocate here so if allocation fails we can bail out early 2773 * before starting the BA session in the firmware 2774 */ 2775 baid_data = kzalloc(sizeof(*baid_data) + 2776 mvm->trans->num_rx_queues * 2777 reorder_buf_size, 2778 GFP_KERNEL); 2779 if (!baid_data) 2780 return -ENOMEM; 2781 2782 /* 2783 * This division is why we need the above BUILD_BUG_ON(), 2784 * if that doesn't hold then this will not be right. 2785 */ 2786 baid_data->entries_per_queue = 2787 reorder_buf_size / sizeof(baid_data->entries[0]); 2788 } 2789 2790 if (iwl_mvm_has_new_rx_api(mvm) && !start) { 2791 baid = mvm_sta->tid_to_baid[tid]; 2792 } else { 2793 /* we don't really need it in this case */ 2794 baid = -1; 2795 } 2796 2797 /* Don't send command to remove (start=0) BAID during restart */ 2798 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 2799 baid = iwl_mvm_fw_baid_op(mvm, mvm_sta, start, tid, ssn, buf_size, 2800 baid); 2801 2802 if (baid < 0) { 2803 ret = baid; 2804 goto out_free; 2805 } 2806 2807 if (start) { 2808 mvm->rx_ba_sessions++; 2809 2810 if (!iwl_mvm_has_new_rx_api(mvm)) 2811 return 0; 2812 2813 baid_data->baid = baid; 2814 baid_data->timeout = timeout; 2815 baid_data->last_rx = jiffies; 2816 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2817 timer_setup(&baid_data->session_timer, 2818 iwl_mvm_rx_agg_session_expired, 0); 2819 baid_data->mvm = mvm; 2820 baid_data->tid = tid; 2821 baid_data->sta_id = mvm_sta->sta_id; 2822 2823 mvm_sta->tid_to_baid[tid] = baid; 2824 if (timeout) 2825 mod_timer(&baid_data->session_timer, 2826 TU_TO_EXP_TIME(timeout * 2)); 2827 2828 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2829 /* 2830 * protect the BA data with RCU to cover a case where our 2831 * internal RX sync mechanism will timeout (not that it's 2832 * supposed to happen) and we will free the session data while 2833 * RX is being processed in parallel 2834 */ 2835 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2836 mvm_sta->sta_id, tid, baid); 2837 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2838 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2839 } else { 2840 baid = mvm_sta->tid_to_baid[tid]; 2841 2842 if (mvm->rx_ba_sessions > 0) 2843 /* check that restart flow didn't zero the counter */ 2844 mvm->rx_ba_sessions--; 2845 if (!iwl_mvm_has_new_rx_api(mvm)) 2846 return 0; 2847 2848 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2849 return -EINVAL; 2850 2851 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2852 if (WARN_ON(!baid_data)) 2853 return -EINVAL; 2854 2855 /* synchronize all rx queues so we can safely delete */ 2856 iwl_mvm_free_reorder(mvm, baid_data); 2857 timer_shutdown_sync(&baid_data->session_timer); 2858 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2859 kfree_rcu(baid_data, rcu_head); 2860 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2861 2862 /* 2863 * After we've deleted it, do another queue sync 2864 * so if an IWL_MVM_RXQ_NSSN_SYNC was concurrently 2865 * running it won't find a new session in the old 2866 * BAID. It can find the NULL pointer for the BAID, 2867 * but we must not have it find a different session. 2868 */ 2869 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_EMPTY, 2870 true, NULL, 0); 2871 } 2872 return 0; 2873 2874 out_free: 2875 kfree(baid_data); 2876 return ret; 2877 } 2878 2879 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2880 int tid, u8 queue, bool start) 2881 { 2882 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2883 struct iwl_mvm_add_sta_cmd cmd = {}; 2884 int ret; 2885 u32 status; 2886 2887 lockdep_assert_held(&mvm->mutex); 2888 2889 if (start) { 2890 mvm_sta->tfd_queue_msk |= BIT(queue); 2891 mvm_sta->tid_disable_agg &= ~BIT(tid); 2892 } else { 2893 /* In DQA-mode the queue isn't removed on agg termination */ 2894 mvm_sta->tid_disable_agg |= BIT(tid); 2895 } 2896 2897 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2898 cmd.sta_id = mvm_sta->sta_id; 2899 cmd.add_modify = STA_MODE_MODIFY; 2900 if (!iwl_mvm_has_new_tx_api(mvm)) 2901 cmd.modify_mask = STA_MODIFY_QUEUES; 2902 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2903 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2904 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2905 2906 status = ADD_STA_SUCCESS; 2907 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2908 iwl_mvm_add_sta_cmd_size(mvm), 2909 &cmd, &status); 2910 if (ret) 2911 return ret; 2912 2913 switch (status & IWL_ADD_STA_STATUS_MASK) { 2914 case ADD_STA_SUCCESS: 2915 break; 2916 default: 2917 ret = -EIO; 2918 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2919 start ? "start" : "stopp", status); 2920 break; 2921 } 2922 2923 return ret; 2924 } 2925 2926 const u8 tid_to_mac80211_ac[] = { 2927 IEEE80211_AC_BE, 2928 IEEE80211_AC_BK, 2929 IEEE80211_AC_BK, 2930 IEEE80211_AC_BE, 2931 IEEE80211_AC_VI, 2932 IEEE80211_AC_VI, 2933 IEEE80211_AC_VO, 2934 IEEE80211_AC_VO, 2935 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2936 }; 2937 2938 static const u8 tid_to_ucode_ac[] = { 2939 AC_BE, 2940 AC_BK, 2941 AC_BK, 2942 AC_BE, 2943 AC_VI, 2944 AC_VI, 2945 AC_VO, 2946 AC_VO, 2947 }; 2948 2949 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2950 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2951 { 2952 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2953 struct iwl_mvm_tid_data *tid_data; 2954 u16 normalized_ssn; 2955 u16 txq_id; 2956 int ret; 2957 2958 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2959 return -EINVAL; 2960 2961 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2962 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2963 IWL_ERR(mvm, 2964 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2965 mvmsta->tid_data[tid].state); 2966 return -ENXIO; 2967 } 2968 2969 lockdep_assert_held(&mvm->mutex); 2970 2971 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2972 iwl_mvm_has_new_tx_api(mvm)) { 2973 u8 ac = tid_to_mac80211_ac[tid]; 2974 2975 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2976 if (ret) 2977 return ret; 2978 } 2979 2980 spin_lock_bh(&mvmsta->lock); 2981 2982 /* 2983 * Note the possible cases: 2984 * 1. An enabled TXQ - TXQ needs to become agg'ed 2985 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2986 * it as reserved 2987 */ 2988 txq_id = mvmsta->tid_data[tid].txq_id; 2989 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2990 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2991 IWL_MVM_DQA_MIN_DATA_QUEUE, 2992 IWL_MVM_DQA_MAX_DATA_QUEUE); 2993 if (ret < 0) { 2994 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2995 goto out; 2996 } 2997 2998 txq_id = ret; 2999 3000 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 3001 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 3002 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 3003 ret = -ENXIO; 3004 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 3005 tid, IWL_MAX_HW_QUEUES - 1); 3006 goto out; 3007 3008 } else if (unlikely(mvm->queue_info[txq_id].status == 3009 IWL_MVM_QUEUE_SHARED)) { 3010 ret = -ENXIO; 3011 IWL_DEBUG_TX_QUEUES(mvm, 3012 "Can't start tid %d agg on shared queue!\n", 3013 tid); 3014 goto out; 3015 } 3016 3017 IWL_DEBUG_TX_QUEUES(mvm, 3018 "AGG for tid %d will be on queue #%d\n", 3019 tid, txq_id); 3020 3021 tid_data = &mvmsta->tid_data[tid]; 3022 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3023 tid_data->txq_id = txq_id; 3024 *ssn = tid_data->ssn; 3025 3026 IWL_DEBUG_TX_QUEUES(mvm, 3027 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 3028 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 3029 tid_data->next_reclaimed); 3030 3031 /* 3032 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3033 * to align the wrap around of ssn so we compare relevant values. 3034 */ 3035 normalized_ssn = tid_data->ssn; 3036 if (mvm->trans->trans_cfg->gen2) 3037 normalized_ssn &= 0xff; 3038 3039 if (normalized_ssn == tid_data->next_reclaimed) { 3040 tid_data->state = IWL_AGG_STARTING; 3041 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 3042 } else { 3043 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 3044 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA; 3045 } 3046 3047 out: 3048 spin_unlock_bh(&mvmsta->lock); 3049 3050 return ret; 3051 } 3052 3053 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3054 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 3055 bool amsdu) 3056 { 3057 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3058 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3059 unsigned int wdg_timeout = 3060 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 3061 int queue, ret; 3062 bool alloc_queue = true; 3063 enum iwl_mvm_queue_status queue_status; 3064 u16 ssn; 3065 3066 struct iwl_trans_txq_scd_cfg cfg = { 3067 .sta_id = mvmsta->sta_id, 3068 .tid = tid, 3069 .frame_limit = buf_size, 3070 .aggregate = true, 3071 }; 3072 3073 /* 3074 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 3075 * manager, so this function should never be called in this case. 3076 */ 3077 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 3078 return -EINVAL; 3079 3080 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 3081 != IWL_MAX_TID_COUNT); 3082 3083 spin_lock_bh(&mvmsta->lock); 3084 ssn = tid_data->ssn; 3085 queue = tid_data->txq_id; 3086 tid_data->state = IWL_AGG_ON; 3087 mvmsta->agg_tids |= BIT(tid); 3088 tid_data->ssn = 0xffff; 3089 tid_data->amsdu_in_ampdu_allowed = amsdu; 3090 spin_unlock_bh(&mvmsta->lock); 3091 3092 if (iwl_mvm_has_new_tx_api(mvm)) { 3093 /* 3094 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 3095 * would have failed, so if we are here there is no need to 3096 * allocate a queue. 3097 * However, if aggregation size is different than the default 3098 * size, the scheduler should be reconfigured. 3099 * We cannot do this with the new TX API, so return unsupported 3100 * for now, until it will be offloaded to firmware.. 3101 * Note that if SCD default value changes - this condition 3102 * should be updated as well. 3103 */ 3104 if (buf_size < IWL_FRAME_LIMIT) 3105 return -ENOTSUPP; 3106 3107 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3108 if (ret) 3109 return -EIO; 3110 goto out; 3111 } 3112 3113 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 3114 3115 queue_status = mvm->queue_info[queue].status; 3116 3117 /* Maybe there is no need to even alloc a queue... */ 3118 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 3119 alloc_queue = false; 3120 3121 /* 3122 * Only reconfig the SCD for the queue if the window size has 3123 * changed from current (become smaller) 3124 */ 3125 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 3126 /* 3127 * If reconfiguring an existing queue, it first must be 3128 * drained 3129 */ 3130 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 3131 BIT(queue)); 3132 if (ret) { 3133 IWL_ERR(mvm, 3134 "Error draining queue before reconfig\n"); 3135 return ret; 3136 } 3137 3138 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 3139 mvmsta->sta_id, tid, 3140 buf_size, ssn); 3141 if (ret) { 3142 IWL_ERR(mvm, 3143 "Error reconfiguring TXQ #%d\n", queue); 3144 return ret; 3145 } 3146 } 3147 3148 if (alloc_queue) 3149 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 3150 &cfg, wdg_timeout); 3151 3152 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 3153 if (queue_status != IWL_MVM_QUEUE_SHARED) { 3154 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 3155 if (ret) 3156 return -EIO; 3157 } 3158 3159 /* No need to mark as reserved */ 3160 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 3161 3162 out: 3163 /* 3164 * Even though in theory the peer could have different 3165 * aggregation reorder buffer sizes for different sessions, 3166 * our ucode doesn't allow for that and has a global limit 3167 * for each station. Therefore, use the minimum of all the 3168 * aggregation sessions and our default value. 3169 */ 3170 mvmsta->max_agg_bufsize = 3171 min(mvmsta->max_agg_bufsize, buf_size); 3172 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 3173 3174 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 3175 sta->addr, tid); 3176 3177 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 3178 } 3179 3180 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3181 struct iwl_mvm_sta *mvmsta, 3182 struct iwl_mvm_tid_data *tid_data) 3183 { 3184 u16 txq_id = tid_data->txq_id; 3185 3186 lockdep_assert_held(&mvm->mutex); 3187 3188 if (iwl_mvm_has_new_tx_api(mvm)) 3189 return; 3190 3191 /* 3192 * The TXQ is marked as reserved only if no traffic came through yet 3193 * This means no traffic has been sent on this TID (agg'd or not), so 3194 * we no longer have use for the queue. Since it hasn't even been 3195 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3196 * free. 3197 */ 3198 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3199 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3200 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3201 } 3202 } 3203 3204 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3205 struct ieee80211_sta *sta, u16 tid) 3206 { 3207 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3208 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3209 u16 txq_id; 3210 int err; 3211 3212 /* 3213 * If mac80211 is cleaning its state, then say that we finished since 3214 * our state has been cleared anyway. 3215 */ 3216 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3217 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3218 return 0; 3219 } 3220 3221 spin_lock_bh(&mvmsta->lock); 3222 3223 txq_id = tid_data->txq_id; 3224 3225 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3226 mvmsta->sta_id, tid, txq_id, tid_data->state); 3227 3228 mvmsta->agg_tids &= ~BIT(tid); 3229 3230 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3231 3232 switch (tid_data->state) { 3233 case IWL_AGG_ON: 3234 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3235 3236 IWL_DEBUG_TX_QUEUES(mvm, 3237 "ssn = %d, next_recl = %d\n", 3238 tid_data->ssn, tid_data->next_reclaimed); 3239 3240 tid_data->ssn = 0xffff; 3241 tid_data->state = IWL_AGG_OFF; 3242 spin_unlock_bh(&mvmsta->lock); 3243 3244 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3245 3246 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3247 return 0; 3248 case IWL_AGG_STARTING: 3249 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3250 /* 3251 * The agg session has been stopped before it was set up. This 3252 * can happen when the AddBA timer times out for example. 3253 */ 3254 3255 /* No barriers since we are under mutex */ 3256 lockdep_assert_held(&mvm->mutex); 3257 3258 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3259 tid_data->state = IWL_AGG_OFF; 3260 err = 0; 3261 break; 3262 default: 3263 IWL_ERR(mvm, 3264 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3265 mvmsta->sta_id, tid, tid_data->state); 3266 IWL_ERR(mvm, 3267 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3268 err = -EINVAL; 3269 } 3270 3271 spin_unlock_bh(&mvmsta->lock); 3272 3273 return err; 3274 } 3275 3276 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3277 struct ieee80211_sta *sta, u16 tid) 3278 { 3279 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3280 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3281 u16 txq_id; 3282 enum iwl_mvm_agg_state old_state; 3283 3284 /* 3285 * First set the agg state to OFF to avoid calling 3286 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3287 */ 3288 spin_lock_bh(&mvmsta->lock); 3289 txq_id = tid_data->txq_id; 3290 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3291 mvmsta->sta_id, tid, txq_id, tid_data->state); 3292 old_state = tid_data->state; 3293 tid_data->state = IWL_AGG_OFF; 3294 mvmsta->agg_tids &= ~BIT(tid); 3295 spin_unlock_bh(&mvmsta->lock); 3296 3297 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3298 3299 if (old_state >= IWL_AGG_ON) { 3300 iwl_mvm_drain_sta(mvm, mvmsta, true); 3301 3302 if (iwl_mvm_has_new_tx_api(mvm)) { 3303 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3304 BIT(tid))) 3305 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3306 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3307 } else { 3308 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id))) 3309 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3310 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3311 } 3312 3313 iwl_mvm_drain_sta(mvm, mvmsta, false); 3314 3315 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3316 } 3317 3318 return 0; 3319 } 3320 3321 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3322 { 3323 int i, max = -1, max_offs = -1; 3324 3325 lockdep_assert_held(&mvm->mutex); 3326 3327 /* Pick the unused key offset with the highest 'deleted' 3328 * counter. Every time a key is deleted, all the counters 3329 * are incremented and the one that was just deleted is 3330 * reset to zero. Thus, the highest counter is the one 3331 * that was deleted longest ago. Pick that one. 3332 */ 3333 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3334 if (test_bit(i, mvm->fw_key_table)) 3335 continue; 3336 if (mvm->fw_key_deleted[i] > max) { 3337 max = mvm->fw_key_deleted[i]; 3338 max_offs = i; 3339 } 3340 } 3341 3342 if (max_offs < 0) 3343 return STA_KEY_IDX_INVALID; 3344 3345 return max_offs; 3346 } 3347 3348 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3349 struct ieee80211_vif *vif, 3350 struct ieee80211_sta *sta) 3351 { 3352 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3353 3354 if (sta) 3355 return iwl_mvm_sta_from_mac80211(sta); 3356 3357 /* 3358 * The device expects GTKs for station interfaces to be 3359 * installed as GTKs for the AP station. If we have no 3360 * station ID, then use AP's station ID. 3361 */ 3362 if (vif->type == NL80211_IFTYPE_STATION && 3363 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3364 u8 sta_id = mvmvif->ap_sta_id; 3365 3366 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3367 lockdep_is_held(&mvm->mutex)); 3368 3369 /* 3370 * It is possible that the 'sta' parameter is NULL, 3371 * for example when a GTK is removed - the sta_id will then 3372 * be the AP ID, and no station was passed by mac80211. 3373 */ 3374 if (IS_ERR_OR_NULL(sta)) 3375 return NULL; 3376 3377 return iwl_mvm_sta_from_mac80211(sta); 3378 } 3379 3380 return NULL; 3381 } 3382 3383 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len) 3384 { 3385 int i; 3386 3387 for (i = len - 1; i >= 0; i--) { 3388 if (pn1[i] > pn2[i]) 3389 return 1; 3390 if (pn1[i] < pn2[i]) 3391 return -1; 3392 } 3393 3394 return 0; 3395 } 3396 3397 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3398 u32 sta_id, 3399 struct ieee80211_key_conf *key, bool mcast, 3400 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3401 u8 key_offset, bool mfp) 3402 { 3403 union { 3404 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3405 struct iwl_mvm_add_sta_key_cmd cmd; 3406 } u = {}; 3407 __le16 key_flags; 3408 int ret; 3409 u32 status; 3410 u16 keyidx; 3411 u64 pn = 0; 3412 int i, size; 3413 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3414 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3415 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY, 3416 new_api ? 2 : 1); 3417 3418 if (sta_id == IWL_MVM_INVALID_STA) 3419 return -EINVAL; 3420 3421 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3422 STA_KEY_FLG_KEYID_MSK; 3423 key_flags = cpu_to_le16(keyidx); 3424 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3425 3426 switch (key->cipher) { 3427 case WLAN_CIPHER_SUITE_TKIP: 3428 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3429 if (api_ver >= 2) { 3430 memcpy((void *)&u.cmd.tx_mic_key, 3431 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3432 IWL_MIC_KEY_SIZE); 3433 3434 memcpy((void *)&u.cmd.rx_mic_key, 3435 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3436 IWL_MIC_KEY_SIZE); 3437 pn = atomic64_read(&key->tx_pn); 3438 3439 } else { 3440 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3441 for (i = 0; i < 5; i++) 3442 u.cmd_v1.tkip_rx_ttak[i] = 3443 cpu_to_le16(tkip_p1k[i]); 3444 } 3445 memcpy(u.cmd.common.key, key->key, key->keylen); 3446 break; 3447 case WLAN_CIPHER_SUITE_CCMP: 3448 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3449 memcpy(u.cmd.common.key, key->key, key->keylen); 3450 if (api_ver >= 2) 3451 pn = atomic64_read(&key->tx_pn); 3452 break; 3453 case WLAN_CIPHER_SUITE_WEP104: 3454 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3455 fallthrough; 3456 case WLAN_CIPHER_SUITE_WEP40: 3457 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3458 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3459 break; 3460 case WLAN_CIPHER_SUITE_GCMP_256: 3461 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3462 fallthrough; 3463 case WLAN_CIPHER_SUITE_GCMP: 3464 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3465 memcpy(u.cmd.common.key, key->key, key->keylen); 3466 if (api_ver >= 2) 3467 pn = atomic64_read(&key->tx_pn); 3468 break; 3469 default: 3470 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3471 memcpy(u.cmd.common.key, key->key, key->keylen); 3472 } 3473 3474 if (mcast) 3475 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3476 if (mfp) 3477 key_flags |= cpu_to_le16(STA_KEY_MFP); 3478 3479 u.cmd.common.key_offset = key_offset; 3480 u.cmd.common.key_flags = key_flags; 3481 u.cmd.common.sta_id = sta_id; 3482 3483 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) 3484 i = 0; 3485 else 3486 i = -1; 3487 3488 for (; i < IEEE80211_NUM_TIDS; i++) { 3489 struct ieee80211_key_seq seq = {}; 3490 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn; 3491 int rx_pn_len = 8; 3492 /* there's a hole at 2/3 in FW format depending on version */ 3493 int hole = api_ver >= 3 ? 0 : 2; 3494 3495 ieee80211_get_key_rx_seq(key, i, &seq); 3496 3497 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { 3498 rx_pn[0] = seq.tkip.iv16; 3499 rx_pn[1] = seq.tkip.iv16 >> 8; 3500 rx_pn[2 + hole] = seq.tkip.iv32; 3501 rx_pn[3 + hole] = seq.tkip.iv32 >> 8; 3502 rx_pn[4 + hole] = seq.tkip.iv32 >> 16; 3503 rx_pn[5 + hole] = seq.tkip.iv32 >> 24; 3504 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) { 3505 rx_pn = seq.hw.seq; 3506 rx_pn_len = seq.hw.seq_len; 3507 } else { 3508 rx_pn[0] = seq.ccmp.pn[0]; 3509 rx_pn[1] = seq.ccmp.pn[1]; 3510 rx_pn[2 + hole] = seq.ccmp.pn[2]; 3511 rx_pn[3 + hole] = seq.ccmp.pn[3]; 3512 rx_pn[4 + hole] = seq.ccmp.pn[4]; 3513 rx_pn[5 + hole] = seq.ccmp.pn[5]; 3514 } 3515 3516 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt, 3517 rx_pn_len) > 0) 3518 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn, 3519 rx_pn_len); 3520 } 3521 3522 if (api_ver >= 2) { 3523 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3524 size = sizeof(u.cmd); 3525 } else { 3526 size = sizeof(u.cmd_v1); 3527 } 3528 3529 status = ADD_STA_SUCCESS; 3530 if (cmd_flags & CMD_ASYNC) 3531 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3532 &u.cmd); 3533 else 3534 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3535 &u.cmd, &status); 3536 3537 switch (status) { 3538 case ADD_STA_SUCCESS: 3539 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3540 break; 3541 default: 3542 ret = -EIO; 3543 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3544 break; 3545 } 3546 3547 return ret; 3548 } 3549 3550 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3551 struct ieee80211_key_conf *keyconf, 3552 u8 sta_id, bool remove_key) 3553 { 3554 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3555 3556 /* verify the key details match the required command's expectations */ 3557 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3558 (keyconf->keyidx != 4 && keyconf->keyidx != 5 && 3559 keyconf->keyidx != 6 && keyconf->keyidx != 7) || 3560 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3561 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3562 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3563 return -EINVAL; 3564 3565 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3566 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3567 return -EINVAL; 3568 3569 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3570 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3571 3572 if (remove_key) { 3573 /* This is a valid situation for IGTK */ 3574 if (sta_id == IWL_MVM_INVALID_STA) 3575 return 0; 3576 3577 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3578 } else { 3579 struct ieee80211_key_seq seq; 3580 const u8 *pn; 3581 3582 switch (keyconf->cipher) { 3583 case WLAN_CIPHER_SUITE_AES_CMAC: 3584 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3585 break; 3586 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3587 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3588 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3589 break; 3590 default: 3591 return -EINVAL; 3592 } 3593 3594 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3595 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3596 igtk_cmd.ctrl_flags |= 3597 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3598 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3599 pn = seq.aes_cmac.pn; 3600 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3601 ((u64) pn[4] << 8) | 3602 ((u64) pn[3] << 16) | 3603 ((u64) pn[2] << 24) | 3604 ((u64) pn[1] << 32) | 3605 ((u64) pn[0] << 40)); 3606 } 3607 3608 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n", 3609 remove_key ? "removing" : "installing", 3610 keyconf->keyidx >= 6 ? "B" : "", 3611 keyconf->keyidx, igtk_cmd.sta_id); 3612 3613 if (!iwl_mvm_has_new_rx_api(mvm)) { 3614 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3615 .ctrl_flags = igtk_cmd.ctrl_flags, 3616 .key_id = igtk_cmd.key_id, 3617 .sta_id = igtk_cmd.sta_id, 3618 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3619 }; 3620 3621 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3622 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3623 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3624 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3625 } 3626 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3627 sizeof(igtk_cmd), &igtk_cmd); 3628 } 3629 3630 3631 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3632 struct ieee80211_vif *vif, 3633 struct ieee80211_sta *sta) 3634 { 3635 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3636 3637 if (sta) 3638 return sta->addr; 3639 3640 if (vif->type == NL80211_IFTYPE_STATION && 3641 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3642 u8 sta_id = mvmvif->ap_sta_id; 3643 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3644 lockdep_is_held(&mvm->mutex)); 3645 return sta->addr; 3646 } 3647 3648 3649 return NULL; 3650 } 3651 3652 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3653 struct ieee80211_vif *vif, 3654 struct ieee80211_sta *sta, 3655 struct ieee80211_key_conf *keyconf, 3656 u8 key_offset, 3657 bool mcast) 3658 { 3659 const u8 *addr; 3660 struct ieee80211_key_seq seq; 3661 u16 p1k[5]; 3662 u32 sta_id; 3663 bool mfp = false; 3664 3665 if (sta) { 3666 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3667 3668 sta_id = mvm_sta->sta_id; 3669 mfp = sta->mfp; 3670 } else if (vif->type == NL80211_IFTYPE_AP && 3671 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3672 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3673 3674 sta_id = mvmvif->mcast_sta.sta_id; 3675 } else { 3676 IWL_ERR(mvm, "Failed to find station id\n"); 3677 return -EINVAL; 3678 } 3679 3680 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) { 3681 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3682 /* get phase 1 key from mac80211 */ 3683 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3684 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3685 3686 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3687 seq.tkip.iv32, p1k, 0, key_offset, 3688 mfp); 3689 } 3690 3691 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3692 0, NULL, 0, key_offset, mfp); 3693 } 3694 3695 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3696 struct ieee80211_vif *vif, 3697 struct ieee80211_sta *sta, 3698 struct ieee80211_key_conf *keyconf, 3699 u8 key_offset) 3700 { 3701 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3702 struct iwl_mvm_sta *mvm_sta; 3703 u8 sta_id = IWL_MVM_INVALID_STA; 3704 int ret; 3705 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3706 3707 lockdep_assert_held(&mvm->mutex); 3708 3709 if (vif->type != NL80211_IFTYPE_AP || 3710 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3711 /* Get the station id from the mvm local station table */ 3712 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3713 if (!mvm_sta) { 3714 IWL_ERR(mvm, "Failed to find station\n"); 3715 return -EINVAL; 3716 } 3717 sta_id = mvm_sta->sta_id; 3718 3719 /* 3720 * It is possible that the 'sta' parameter is NULL, and thus 3721 * there is a need to retrieve the sta from the local station 3722 * table. 3723 */ 3724 if (!sta) { 3725 sta = rcu_dereference_protected( 3726 mvm->fw_id_to_mac_id[sta_id], 3727 lockdep_is_held(&mvm->mutex)); 3728 if (IS_ERR_OR_NULL(sta)) { 3729 IWL_ERR(mvm, "Invalid station id\n"); 3730 return -EINVAL; 3731 } 3732 } 3733 3734 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3735 return -EINVAL; 3736 } else { 3737 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3738 3739 sta_id = mvmvif->mcast_sta.sta_id; 3740 } 3741 3742 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3743 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3744 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3745 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3746 goto end; 3747 } 3748 3749 /* If the key_offset is not pre-assigned, we need to find a 3750 * new offset to use. In normal cases, the offset is not 3751 * pre-assigned, but during HW_RESTART we want to reuse the 3752 * same indices, so we pass them when this function is called. 3753 * 3754 * In D3 entry, we need to hardcoded the indices (because the 3755 * firmware hardcodes the PTK offset to 0). In this case, we 3756 * need to make sure we don't overwrite the hw_key_idx in the 3757 * keyconf structure, because otherwise we cannot configure 3758 * the original ones back when resuming. 3759 */ 3760 if (key_offset == STA_KEY_IDX_INVALID) { 3761 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3762 if (key_offset == STA_KEY_IDX_INVALID) 3763 return -ENOSPC; 3764 keyconf->hw_key_idx = key_offset; 3765 } 3766 3767 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3768 if (ret) 3769 goto end; 3770 3771 /* 3772 * For WEP, the same key is used for multicast and unicast. Upload it 3773 * again, using the same key offset, and now pointing the other one 3774 * to the same key slot (offset). 3775 * If this fails, remove the original as well. 3776 */ 3777 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3778 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3779 sta) { 3780 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3781 key_offset, !mcast); 3782 if (ret) { 3783 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3784 goto end; 3785 } 3786 } 3787 3788 __set_bit(key_offset, mvm->fw_key_table); 3789 3790 end: 3791 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3792 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3793 sta ? sta->addr : zero_addr, ret); 3794 return ret; 3795 } 3796 3797 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3798 struct ieee80211_vif *vif, 3799 struct ieee80211_sta *sta, 3800 struct ieee80211_key_conf *keyconf) 3801 { 3802 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3803 struct iwl_mvm_sta *mvm_sta; 3804 u8 sta_id = IWL_MVM_INVALID_STA; 3805 int ret, i; 3806 3807 lockdep_assert_held(&mvm->mutex); 3808 3809 /* Get the station from the mvm local station table */ 3810 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3811 if (mvm_sta) 3812 sta_id = mvm_sta->sta_id; 3813 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3814 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3815 3816 3817 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3818 keyconf->keyidx, sta_id); 3819 3820 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3821 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3822 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3823 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3824 3825 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3826 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3827 keyconf->hw_key_idx); 3828 return -ENOENT; 3829 } 3830 3831 /* track which key was deleted last */ 3832 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3833 if (mvm->fw_key_deleted[i] < U8_MAX) 3834 mvm->fw_key_deleted[i]++; 3835 } 3836 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3837 3838 if (sta && !mvm_sta) { 3839 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3840 return 0; 3841 } 3842 3843 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3844 if (ret) 3845 return ret; 3846 3847 /* delete WEP key twice to get rid of (now useless) offset */ 3848 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3849 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3850 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3851 3852 return ret; 3853 } 3854 3855 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3856 struct ieee80211_vif *vif, 3857 struct ieee80211_key_conf *keyconf, 3858 struct ieee80211_sta *sta, u32 iv32, 3859 u16 *phase1key) 3860 { 3861 struct iwl_mvm_sta *mvm_sta; 3862 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3863 bool mfp = sta ? sta->mfp : false; 3864 3865 rcu_read_lock(); 3866 3867 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3868 if (WARN_ON_ONCE(!mvm_sta)) 3869 goto unlock; 3870 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3871 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3872 mfp); 3873 3874 unlock: 3875 rcu_read_unlock(); 3876 } 3877 3878 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3879 struct ieee80211_sta *sta) 3880 { 3881 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3882 struct iwl_mvm_add_sta_cmd cmd = { 3883 .add_modify = STA_MODE_MODIFY, 3884 .sta_id = mvmsta->sta_id, 3885 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3886 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3887 }; 3888 int ret; 3889 3890 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3891 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3892 if (ret) 3893 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3894 } 3895 3896 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3897 struct ieee80211_sta *sta, 3898 enum ieee80211_frame_release_type reason, 3899 u16 cnt, u16 tids, bool more_data, 3900 bool single_sta_queue) 3901 { 3902 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3903 struct iwl_mvm_add_sta_cmd cmd = { 3904 .add_modify = STA_MODE_MODIFY, 3905 .sta_id = mvmsta->sta_id, 3906 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3907 .sleep_tx_count = cpu_to_le16(cnt), 3908 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3909 }; 3910 int tid, ret; 3911 unsigned long _tids = tids; 3912 3913 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3914 * Note that this field is reserved and unused by firmware not 3915 * supporting GO uAPSD, so it's safe to always do this. 3916 */ 3917 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3918 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3919 3920 /* If we're releasing frames from aggregation or dqa queues then check 3921 * if all the queues that we're releasing frames from, combined, have: 3922 * - more frames than the service period, in which case more_data 3923 * needs to be set 3924 * - fewer than 'cnt' frames, in which case we need to adjust the 3925 * firmware command (but do that unconditionally) 3926 */ 3927 if (single_sta_queue) { 3928 int remaining = cnt; 3929 int sleep_tx_count; 3930 3931 spin_lock_bh(&mvmsta->lock); 3932 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3933 struct iwl_mvm_tid_data *tid_data; 3934 u16 n_queued; 3935 3936 tid_data = &mvmsta->tid_data[tid]; 3937 3938 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3939 if (n_queued > remaining) { 3940 more_data = true; 3941 remaining = 0; 3942 break; 3943 } 3944 remaining -= n_queued; 3945 } 3946 sleep_tx_count = cnt - remaining; 3947 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3948 mvmsta->sleep_tx_count = sleep_tx_count; 3949 spin_unlock_bh(&mvmsta->lock); 3950 3951 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3952 if (WARN_ON(cnt - remaining == 0)) { 3953 ieee80211_sta_eosp(sta); 3954 return; 3955 } 3956 } 3957 3958 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3959 if (more_data) 3960 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3961 3962 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3963 mvmsta->next_status_eosp = true; 3964 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3965 } else { 3966 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3967 } 3968 3969 /* block the Tx queues until the FW updated the sleep Tx count */ 3970 iwl_trans_block_txq_ptrs(mvm->trans, true); 3971 3972 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3973 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3974 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3975 if (ret) 3976 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3977 } 3978 3979 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3980 struct iwl_rx_cmd_buffer *rxb) 3981 { 3982 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3983 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3984 struct ieee80211_sta *sta; 3985 u32 sta_id = le32_to_cpu(notif->sta_id); 3986 3987 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations)) 3988 return; 3989 3990 rcu_read_lock(); 3991 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3992 if (!IS_ERR_OR_NULL(sta)) 3993 ieee80211_sta_eosp(sta); 3994 rcu_read_unlock(); 3995 } 3996 3997 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3998 struct iwl_mvm_sta *mvmsta, bool disable) 3999 { 4000 struct iwl_mvm_add_sta_cmd cmd = { 4001 .add_modify = STA_MODE_MODIFY, 4002 .sta_id = mvmsta->sta_id, 4003 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 4004 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 4005 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 4006 }; 4007 int ret; 4008 4009 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4010 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4011 if (ret) 4012 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4013 } 4014 4015 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 4016 struct ieee80211_sta *sta, 4017 bool disable) 4018 { 4019 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 4020 4021 spin_lock_bh(&mvm_sta->lock); 4022 4023 if (mvm_sta->disable_tx == disable) { 4024 spin_unlock_bh(&mvm_sta->lock); 4025 return; 4026 } 4027 4028 mvm_sta->disable_tx = disable; 4029 4030 /* 4031 * If sta PS state is handled by mac80211, tell it to start/stop 4032 * queuing tx for this station. 4033 */ 4034 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS)) 4035 ieee80211_sta_block_awake(mvm->hw, sta, disable); 4036 4037 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 4038 4039 spin_unlock_bh(&mvm_sta->lock); 4040 } 4041 4042 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 4043 struct iwl_mvm_vif *mvmvif, 4044 struct iwl_mvm_int_sta *sta, 4045 bool disable) 4046 { 4047 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 4048 struct iwl_mvm_add_sta_cmd cmd = { 4049 .add_modify = STA_MODE_MODIFY, 4050 .sta_id = sta->sta_id, 4051 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 4052 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 4053 .mac_id_n_color = cpu_to_le32(id), 4054 }; 4055 int ret; 4056 4057 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 4058 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 4059 if (ret) 4060 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 4061 } 4062 4063 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 4064 struct iwl_mvm_vif *mvmvif, 4065 bool disable) 4066 { 4067 struct ieee80211_sta *sta; 4068 struct iwl_mvm_sta *mvm_sta; 4069 int i; 4070 4071 rcu_read_lock(); 4072 4073 /* Block/unblock all the stations of the given mvmvif */ 4074 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { 4075 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]); 4076 if (IS_ERR_OR_NULL(sta)) 4077 continue; 4078 4079 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 4080 if (mvm_sta->mac_id_n_color != 4081 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 4082 continue; 4083 4084 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 4085 } 4086 4087 rcu_read_unlock(); 4088 4089 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 4090 return; 4091 4092 /* Need to block/unblock also multicast station */ 4093 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 4094 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 4095 &mvmvif->mcast_sta, disable); 4096 4097 /* 4098 * Only unblock the broadcast station (FW blocks it for immediate 4099 * quiet, not the driver) 4100 */ 4101 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 4102 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 4103 &mvmvif->bcast_sta, disable); 4104 } 4105 4106 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 4107 { 4108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 4109 struct iwl_mvm_sta *mvmsta; 4110 4111 rcu_read_lock(); 4112 4113 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 4114 4115 if (mvmsta) 4116 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 4117 4118 rcu_read_unlock(); 4119 } 4120 4121 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 4122 { 4123 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 4124 4125 /* 4126 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 4127 * to align the wrap around of ssn so we compare relevant values. 4128 */ 4129 if (mvm->trans->trans_cfg->gen2) 4130 sn &= 0xff; 4131 4132 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 4133 } 4134 4135 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 4136 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher, 4137 u8 *key, u32 key_len) 4138 { 4139 int ret; 4140 u16 queue; 4141 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 4142 struct ieee80211_key_conf *keyconf; 4143 4144 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0, 4145 NL80211_IFTYPE_UNSPECIFIED, 4146 IWL_STA_LINK); 4147 if (ret) 4148 return ret; 4149 4150 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 4151 addr, sta, &queue, 4152 IWL_MVM_TX_FIFO_BE); 4153 if (ret) 4154 goto out; 4155 4156 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL); 4157 if (!keyconf) { 4158 ret = -ENOBUFS; 4159 goto out; 4160 } 4161 4162 keyconf->cipher = cipher; 4163 memcpy(keyconf->key, key, key_len); 4164 keyconf->keylen = key_len; 4165 4166 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false, 4167 0, NULL, 0, 0, true); 4168 kfree(keyconf); 4169 return 0; 4170 out: 4171 iwl_mvm_dealloc_int_sta(mvm, sta); 4172 return ret; 4173 } 4174 4175 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm, 4176 struct ieee80211_vif *vif, 4177 u32 mac_id) 4178 { 4179 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = { 4180 .mac_id = cpu_to_le32(mac_id), 4181 }; 4182 int ret; 4183 4184 ret = iwl_mvm_send_cmd_pdu(mvm, 4185 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD), 4186 CMD_ASYNC, 4187 sizeof(cancel_channel_switch_cmd), 4188 &cancel_channel_switch_cmd); 4189 if (ret) 4190 IWL_ERR(mvm, "Failed to cancel the channel switch\n"); 4191 } 4192