1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <net/mac80211.h> 68 69 #include "mvm.h" 70 #include "sta.h" 71 #include "rs.h" 72 73 /* 74 * New version of ADD_STA_sta command added new fields at the end of the 75 * structure, so sending the size of the relevant API's structure is enough to 76 * support both API versions. 77 */ 78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 79 { 80 return iwl_mvm_has_new_rx_api(mvm) ? 81 sizeof(struct iwl_mvm_add_sta_cmd) : 82 sizeof(struct iwl_mvm_add_sta_cmd_v7); 83 } 84 85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 86 enum nl80211_iftype iftype) 87 { 88 int sta_id; 89 u32 reserved_ids = 0; 90 91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 93 94 lockdep_assert_held(&mvm->mutex); 95 96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 97 if (iftype != NL80211_IFTYPE_STATION) 98 reserved_ids = BIT(0); 99 100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { 102 if (BIT(sta_id) & reserved_ids) 103 continue; 104 105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 106 lockdep_is_held(&mvm->mutex))) 107 return sta_id; 108 } 109 return IWL_MVM_STATION_COUNT; 110 } 111 112 /* send station add/update command to firmware */ 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 114 bool update, unsigned int flags) 115 { 116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 117 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 118 .sta_id = mvm_sta->sta_id, 119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 120 .add_modify = update ? 1 : 0, 121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 122 STA_FLG_MIMO_EN_MSK), 123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 124 }; 125 int ret; 126 u32 status; 127 u32 agg_size = 0, mpdu_dens = 0; 128 129 if (!update || (flags & STA_MODIFY_QUEUES)) { 130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 133 if (flags & STA_MODIFY_QUEUES) 134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 135 } 136 137 switch (sta->bandwidth) { 138 case IEEE80211_STA_RX_BW_160: 139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 140 /* fall through */ 141 case IEEE80211_STA_RX_BW_80: 142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 143 /* fall through */ 144 case IEEE80211_STA_RX_BW_40: 145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 146 /* fall through */ 147 case IEEE80211_STA_RX_BW_20: 148 if (sta->ht_cap.ht_supported) 149 add_sta_cmd.station_flags |= 150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 151 break; 152 } 153 154 switch (sta->rx_nss) { 155 case 1: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 157 break; 158 case 2: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 160 break; 161 case 3 ... 8: 162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 163 break; 164 } 165 166 switch (sta->smps_mode) { 167 case IEEE80211_SMPS_AUTOMATIC: 168 case IEEE80211_SMPS_NUM_MODES: 169 WARN_ON(1); 170 break; 171 case IEEE80211_SMPS_STATIC: 172 /* override NSS */ 173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 175 break; 176 case IEEE80211_SMPS_DYNAMIC: 177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 178 break; 179 case IEEE80211_SMPS_OFF: 180 /* nothing */ 181 break; 182 } 183 184 if (sta->ht_cap.ht_supported) { 185 add_sta_cmd.station_flags_msk |= 186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 187 STA_FLG_AGG_MPDU_DENS_MSK); 188 189 mpdu_dens = sta->ht_cap.ampdu_density; 190 } 191 192 if (sta->vht_cap.vht_supported) { 193 agg_size = sta->vht_cap.cap & 194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 195 agg_size >>= 196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 197 } else if (sta->ht_cap.ht_supported) { 198 agg_size = sta->ht_cap.ampdu_factor; 199 } 200 201 add_sta_cmd.station_flags |= 202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 203 add_sta_cmd.station_flags |= 204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 205 206 status = ADD_STA_SUCCESS; 207 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 208 iwl_mvm_add_sta_cmd_size(mvm), 209 &add_sta_cmd, &status); 210 if (ret) 211 return ret; 212 213 switch (status & IWL_ADD_STA_STATUS_MASK) { 214 case ADD_STA_SUCCESS: 215 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 216 break; 217 default: 218 ret = -EIO; 219 IWL_ERR(mvm, "ADD_STA failed\n"); 220 break; 221 } 222 223 return ret; 224 } 225 226 static void iwl_mvm_rx_agg_session_expired(unsigned long data) 227 { 228 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data; 229 struct iwl_mvm_baid_data *ba_data; 230 struct ieee80211_sta *sta; 231 struct iwl_mvm_sta *mvm_sta; 232 unsigned long timeout; 233 234 rcu_read_lock(); 235 236 ba_data = rcu_dereference(*rcu_ptr); 237 238 if (WARN_ON(!ba_data)) 239 goto unlock; 240 241 if (!ba_data->timeout) 242 goto unlock; 243 244 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 245 if (time_is_after_jiffies(timeout)) { 246 mod_timer(&ba_data->session_timer, timeout); 247 goto unlock; 248 } 249 250 /* Timer expired */ 251 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 252 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 253 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif, 254 sta->addr, ba_data->tid); 255 unlock: 256 rcu_read_unlock(); 257 } 258 259 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, 260 struct ieee80211_sta *sta) 261 { 262 unsigned long used_hw_queues; 263 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 264 unsigned int wdg_timeout = 265 iwl_mvm_get_wd_timeout(mvm, NULL, true, false); 266 u32 ac; 267 268 lockdep_assert_held(&mvm->mutex); 269 270 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); 271 272 /* Find available queues, and allocate them to the ACs */ 273 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 274 u8 queue = find_first_zero_bit(&used_hw_queues, 275 mvm->first_agg_queue); 276 277 if (queue >= mvm->first_agg_queue) { 278 IWL_ERR(mvm, "Failed to allocate STA queue\n"); 279 return -EBUSY; 280 } 281 282 __set_bit(queue, &used_hw_queues); 283 mvmsta->hw_queue[ac] = queue; 284 } 285 286 /* Found a place for all queues - enable them */ 287 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 288 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], 289 mvmsta->hw_queue[ac], 290 iwl_mvm_ac_to_tx_fifo[ac], 0, 291 wdg_timeout); 292 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); 293 } 294 295 return 0; 296 } 297 298 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, 299 struct ieee80211_sta *sta) 300 { 301 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 302 unsigned long sta_msk; 303 int i; 304 305 lockdep_assert_held(&mvm->mutex); 306 307 /* disable the TDLS STA-specific queues */ 308 sta_msk = mvmsta->tfd_queue_msk; 309 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) 310 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); 311 } 312 313 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 314 struct ieee80211_sta *sta, u8 ac, int tid, 315 struct ieee80211_hdr *hdr) 316 { 317 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 318 struct iwl_trans_txq_scd_cfg cfg = { 319 .fifo = iwl_mvm_ac_to_tx_fifo[ac], 320 .sta_id = mvmsta->sta_id, 321 .tid = tid, 322 .frame_limit = IWL_FRAME_LIMIT, 323 }; 324 unsigned int wdg_timeout = 325 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 326 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 327 int queue = -1; 328 int ssn; 329 int ret; 330 331 lockdep_assert_held(&mvm->mutex); 332 333 spin_lock_bh(&mvm->queue_info_lock); 334 335 /* 336 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 337 * exists 338 */ 339 if (!ieee80211_is_data_qos(hdr->frame_control) || 340 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 341 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_MGMT_QUEUE, 342 IWL_MVM_DQA_MAX_MGMT_QUEUE); 343 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 344 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 345 queue); 346 347 /* If no such queue is found, we'll use a DATA queue instead */ 348 } 349 350 if (queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 351 queue = mvmsta->reserved_queue; 352 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 353 } 354 355 if (queue < 0) 356 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE, 357 IWL_MVM_DQA_MAX_DATA_QUEUE); 358 359 /* 360 * Mark TXQ as ready, even though it hasn't been fully configured yet, 361 * to make sure no one else takes it. 362 * This will allow avoiding re-acquiring the lock at the end of the 363 * configuration. On error we'll mark it back as free. 364 */ 365 if (queue >= 0) 366 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 367 368 spin_unlock_bh(&mvm->queue_info_lock); 369 370 /* TODO: support shared queues for same RA */ 371 if (queue < 0) 372 return -ENOSPC; 373 374 /* 375 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 376 * but for configuring the SCD to send A-MPDUs we need to mark the queue 377 * as aggregatable. 378 * Mark all DATA queues as allowing to be aggregated at some point 379 */ 380 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 381 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 382 383 IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue #%d to sta %d on tid %d\n", 384 queue, mvmsta->sta_id, tid); 385 386 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 387 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg, 388 wdg_timeout); 389 390 spin_lock_bh(&mvmsta->lock); 391 mvmsta->tid_data[tid].txq_id = queue; 392 mvmsta->tfd_queue_msk |= BIT(queue); 393 394 if (mvmsta->reserved_queue == queue) 395 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 396 spin_unlock_bh(&mvmsta->lock); 397 398 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 399 if (ret) 400 goto out_err; 401 402 return 0; 403 404 out_err: 405 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 406 407 return ret; 408 } 409 410 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 411 { 412 if (tid == IWL_MAX_TID_COUNT) 413 return IEEE80211_AC_VO; /* MGMT */ 414 415 return tid_to_mac80211_ac[tid]; 416 } 417 418 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 419 struct ieee80211_sta *sta, int tid) 420 { 421 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 422 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 423 struct sk_buff *skb; 424 struct ieee80211_hdr *hdr; 425 struct sk_buff_head deferred_tx; 426 u8 mac_queue; 427 bool no_queue = false; /* Marks if there is a problem with the queue */ 428 u8 ac; 429 430 lockdep_assert_held(&mvm->mutex); 431 432 skb = skb_peek(&tid_data->deferred_tx_frames); 433 if (!skb) 434 return; 435 hdr = (void *)skb->data; 436 437 ac = iwl_mvm_tid_to_ac_queue(tid); 438 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 439 440 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE && 441 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 442 IWL_ERR(mvm, 443 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 444 mvmsta->sta_id, tid); 445 446 /* 447 * Mark queue as problematic so later the deferred traffic is 448 * freed, as we can do nothing with it 449 */ 450 no_queue = true; 451 } 452 453 __skb_queue_head_init(&deferred_tx); 454 455 /* Disable bottom-halves when entering TX path */ 456 local_bh_disable(); 457 spin_lock(&mvmsta->lock); 458 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 459 spin_unlock(&mvmsta->lock); 460 461 while ((skb = __skb_dequeue(&deferred_tx))) 462 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 463 ieee80211_free_txskb(mvm->hw, skb); 464 local_bh_enable(); 465 466 /* Wake queue */ 467 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 468 } 469 470 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 471 { 472 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 473 add_stream_wk); 474 struct ieee80211_sta *sta; 475 struct iwl_mvm_sta *mvmsta; 476 unsigned long deferred_tid_traffic; 477 int sta_id, tid; 478 479 mutex_lock(&mvm->mutex); 480 481 /* Go over all stations with deferred traffic */ 482 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 483 IWL_MVM_STATION_COUNT) { 484 clear_bit(sta_id, mvm->sta_deferred_frames); 485 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 486 lockdep_is_held(&mvm->mutex)); 487 if (IS_ERR_OR_NULL(sta)) 488 continue; 489 490 mvmsta = iwl_mvm_sta_from_mac80211(sta); 491 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 492 493 for_each_set_bit(tid, &deferred_tid_traffic, 494 IWL_MAX_TID_COUNT + 1) 495 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 496 } 497 498 mutex_unlock(&mvm->mutex); 499 } 500 501 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 502 struct ieee80211_sta *sta, 503 enum nl80211_iftype vif_type) 504 { 505 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 506 int queue; 507 508 spin_lock_bh(&mvm->queue_info_lock); 509 510 /* Make sure we have free resources for this STA */ 511 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 512 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 513 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 514 IWL_MVM_QUEUE_FREE)) 515 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 516 else 517 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE, 518 IWL_MVM_DQA_MAX_DATA_QUEUE); 519 if (queue < 0) { 520 spin_unlock_bh(&mvm->queue_info_lock); 521 IWL_ERR(mvm, "No available queues for new station\n"); 522 return -ENOSPC; 523 } 524 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 525 526 spin_unlock_bh(&mvm->queue_info_lock); 527 528 mvmsta->reserved_queue = queue; 529 530 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 531 queue, mvmsta->sta_id); 532 533 return 0; 534 } 535 536 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 537 struct ieee80211_vif *vif, 538 struct ieee80211_sta *sta) 539 { 540 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 541 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 542 struct iwl_mvm_rxq_dup_data *dup_data; 543 int i, ret, sta_id; 544 545 lockdep_assert_held(&mvm->mutex); 546 547 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 548 sta_id = iwl_mvm_find_free_sta_id(mvm, 549 ieee80211_vif_type_p2p(vif)); 550 else 551 sta_id = mvm_sta->sta_id; 552 553 if (sta_id == IWL_MVM_STATION_COUNT) 554 return -ENOSPC; 555 556 spin_lock_init(&mvm_sta->lock); 557 558 mvm_sta->sta_id = sta_id; 559 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 560 mvmvif->color); 561 mvm_sta->vif = vif; 562 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 563 mvm_sta->tx_protection = 0; 564 mvm_sta->tt_tx_protection = false; 565 566 /* HW restart, don't assume the memory has been zeroed */ 567 atomic_set(&mvm->pending_frames[sta_id], 0); 568 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 569 mvm_sta->tfd_queue_msk = 0; 570 571 /* allocate new queues for a TDLS station */ 572 if (sta->tdls) { 573 ret = iwl_mvm_tdls_sta_init(mvm, sta); 574 if (ret) 575 return ret; 576 } else if (!iwl_mvm_is_dqa_supported(mvm)) { 577 for (i = 0; i < IEEE80211_NUM_ACS; i++) 578 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 579 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); 580 } 581 582 /* for HW restart - reset everything but the sequence number */ 583 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 584 u16 seq = mvm_sta->tid_data[i].seq_number; 585 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 586 mvm_sta->tid_data[i].seq_number = seq; 587 588 if (!iwl_mvm_is_dqa_supported(mvm)) 589 continue; 590 591 /* 592 * Mark all queues for this STA as unallocated and defer TX 593 * frames until the queue is allocated 594 */ 595 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; 596 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 597 } 598 mvm_sta->deferred_traffic_tid_map = 0; 599 mvm_sta->agg_tids = 0; 600 601 if (iwl_mvm_has_new_rx_api(mvm) && 602 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 603 dup_data = kcalloc(mvm->trans->num_rx_queues, 604 sizeof(*dup_data), 605 GFP_KERNEL); 606 if (!dup_data) 607 return -ENOMEM; 608 mvm_sta->dup_data = dup_data; 609 } 610 611 if (iwl_mvm_is_dqa_supported(mvm)) { 612 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 613 ieee80211_vif_type_p2p(vif)); 614 if (ret) 615 goto err; 616 } 617 618 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0); 619 if (ret) 620 goto err; 621 622 if (vif->type == NL80211_IFTYPE_STATION) { 623 if (!sta->tdls) { 624 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); 625 mvmvif->ap_sta_id = sta_id; 626 } else { 627 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); 628 } 629 } 630 631 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 632 633 return 0; 634 635 err: 636 iwl_mvm_tdls_sta_deinit(mvm, sta); 637 return ret; 638 } 639 640 int iwl_mvm_update_sta(struct iwl_mvm *mvm, 641 struct ieee80211_vif *vif, 642 struct ieee80211_sta *sta) 643 { 644 return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0); 645 } 646 647 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 648 bool drain) 649 { 650 struct iwl_mvm_add_sta_cmd cmd = {}; 651 int ret; 652 u32 status; 653 654 lockdep_assert_held(&mvm->mutex); 655 656 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 657 cmd.sta_id = mvmsta->sta_id; 658 cmd.add_modify = STA_MODE_MODIFY; 659 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 660 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 661 662 status = ADD_STA_SUCCESS; 663 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 664 iwl_mvm_add_sta_cmd_size(mvm), 665 &cmd, &status); 666 if (ret) 667 return ret; 668 669 switch (status & IWL_ADD_STA_STATUS_MASK) { 670 case ADD_STA_SUCCESS: 671 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 672 mvmsta->sta_id); 673 break; 674 default: 675 ret = -EIO; 676 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 677 mvmsta->sta_id); 678 break; 679 } 680 681 return ret; 682 } 683 684 /* 685 * Remove a station from the FW table. Before sending the command to remove 686 * the station validate that the station is indeed known to the driver (sanity 687 * only). 688 */ 689 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 690 { 691 struct ieee80211_sta *sta; 692 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 693 .sta_id = sta_id, 694 }; 695 int ret; 696 697 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 698 lockdep_is_held(&mvm->mutex)); 699 700 /* Note: internal stations are marked as error values */ 701 if (!sta) { 702 IWL_ERR(mvm, "Invalid station id\n"); 703 return -EINVAL; 704 } 705 706 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 707 sizeof(rm_sta_cmd), &rm_sta_cmd); 708 if (ret) { 709 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 710 return ret; 711 } 712 713 return 0; 714 } 715 716 void iwl_mvm_sta_drained_wk(struct work_struct *wk) 717 { 718 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); 719 u8 sta_id; 720 721 /* 722 * The mutex is needed because of the SYNC cmd, but not only: if the 723 * work would run concurrently with iwl_mvm_rm_sta, it would run before 724 * iwl_mvm_rm_sta sets the station as busy, and exit. Then 725 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean 726 * that later. 727 */ 728 mutex_lock(&mvm->mutex); 729 730 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { 731 int ret; 732 struct ieee80211_sta *sta = 733 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 734 lockdep_is_held(&mvm->mutex)); 735 736 /* 737 * This station is in use or RCU-removed; the latter happens in 738 * managed mode, where mac80211 removes the station before we 739 * can remove it from firmware (we can only do that after the 740 * MAC is marked unassociated), and possibly while the deauth 741 * frame to disconnect from the AP is still queued. Then, the 742 * station pointer is -ENOENT when the last skb is reclaimed. 743 */ 744 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) 745 continue; 746 747 if (PTR_ERR(sta) == -EINVAL) { 748 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", 749 sta_id); 750 continue; 751 } 752 753 if (!sta) { 754 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", 755 sta_id); 756 continue; 757 } 758 759 WARN_ON(PTR_ERR(sta) != -EBUSY); 760 /* This station was removed and we waited until it got drained, 761 * we can now proceed and remove it. 762 */ 763 ret = iwl_mvm_rm_sta_common(mvm, sta_id); 764 if (ret) { 765 IWL_ERR(mvm, 766 "Couldn't remove sta %d after it was drained\n", 767 sta_id); 768 continue; 769 } 770 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 771 clear_bit(sta_id, mvm->sta_drained); 772 773 if (mvm->tfd_drained[sta_id]) { 774 unsigned long i, msk = mvm->tfd_drained[sta_id]; 775 776 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) 777 iwl_mvm_disable_txq(mvm, i, i, 778 IWL_MAX_TID_COUNT, 0); 779 780 mvm->tfd_drained[sta_id] = 0; 781 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", 782 sta_id, msk); 783 } 784 } 785 786 mutex_unlock(&mvm->mutex); 787 } 788 789 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 790 struct ieee80211_vif *vif, 791 struct iwl_mvm_sta *mvm_sta) 792 { 793 int ac; 794 int i; 795 796 lockdep_assert_held(&mvm->mutex); 797 798 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 799 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE) 800 continue; 801 802 ac = iwl_mvm_tid_to_ac_queue(i); 803 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 804 vif->hw_queue[ac], i, 0); 805 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; 806 } 807 } 808 809 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 810 struct ieee80211_vif *vif, 811 struct ieee80211_sta *sta) 812 { 813 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 814 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 815 int ret; 816 817 lockdep_assert_held(&mvm->mutex); 818 819 if (iwl_mvm_has_new_rx_api(mvm)) 820 kfree(mvm_sta->dup_data); 821 822 if (vif->type == NL80211_IFTYPE_STATION && 823 mvmvif->ap_sta_id == mvm_sta->sta_id) { 824 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 825 if (ret) 826 return ret; 827 /* flush its queues here since we are freeing mvm_sta */ 828 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); 829 if (ret) 830 return ret; 831 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 832 mvm_sta->tfd_queue_msk); 833 if (ret) 834 return ret; 835 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 836 837 /* If DQA is supported - the queues can be disabled now */ 838 if (iwl_mvm_is_dqa_supported(mvm)) 839 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 840 841 /* if we are associated - we can't remove the AP STA now */ 842 if (vif->bss_conf.assoc) 843 return ret; 844 845 /* unassoc - go ahead - remove the AP STA now */ 846 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 847 848 /* clear d0i3_ap_sta_id if no longer relevant */ 849 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id) 850 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; 851 } 852 853 /* 854 * This shouldn't happen - the TDLS channel switch should be canceled 855 * before the STA is removed. 856 */ 857 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) { 858 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; 859 cancel_delayed_work(&mvm->tdls_cs.dwork); 860 } 861 862 /* 863 * Make sure that the tx response code sees the station as -EBUSY and 864 * calls the drain worker. 865 */ 866 spin_lock_bh(&mvm_sta->lock); 867 /* 868 * There are frames pending on the AC queues for this station. 869 * We need to wait until all the frames are drained... 870 */ 871 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { 872 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], 873 ERR_PTR(-EBUSY)); 874 spin_unlock_bh(&mvm_sta->lock); 875 876 /* disable TDLS sta queues on drain complete */ 877 if (sta->tdls) { 878 mvm->tfd_drained[mvm_sta->sta_id] = 879 mvm_sta->tfd_queue_msk; 880 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", 881 mvm_sta->sta_id); 882 } 883 884 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 885 } else { 886 spin_unlock_bh(&mvm_sta->lock); 887 888 if (sta->tdls) 889 iwl_mvm_tdls_sta_deinit(mvm, sta); 890 891 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 892 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 893 } 894 895 return ret; 896 } 897 898 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 899 struct ieee80211_vif *vif, 900 u8 sta_id) 901 { 902 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 903 904 lockdep_assert_held(&mvm->mutex); 905 906 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 907 return ret; 908 } 909 910 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 911 struct iwl_mvm_int_sta *sta, 912 u32 qmask, enum nl80211_iftype iftype) 913 { 914 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 915 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 916 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) 917 return -ENOSPC; 918 } 919 920 sta->tfd_queue_msk = qmask; 921 922 /* put a non-NULL value so iterating over the stations won't stop */ 923 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 924 return 0; 925 } 926 927 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, 928 struct iwl_mvm_int_sta *sta) 929 { 930 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 931 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 932 sta->sta_id = IWL_MVM_STATION_COUNT; 933 } 934 935 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 936 struct iwl_mvm_int_sta *sta, 937 const u8 *addr, 938 u16 mac_id, u16 color) 939 { 940 struct iwl_mvm_add_sta_cmd cmd; 941 int ret; 942 u32 status; 943 944 lockdep_assert_held(&mvm->mutex); 945 946 memset(&cmd, 0, sizeof(cmd)); 947 cmd.sta_id = sta->sta_id; 948 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 949 color)); 950 951 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 952 cmd.tid_disable_tx = cpu_to_le16(0xffff); 953 954 if (addr) 955 memcpy(cmd.addr, addr, ETH_ALEN); 956 957 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 958 iwl_mvm_add_sta_cmd_size(mvm), 959 &cmd, &status); 960 if (ret) 961 return ret; 962 963 switch (status & IWL_ADD_STA_STATUS_MASK) { 964 case ADD_STA_SUCCESS: 965 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 966 return 0; 967 default: 968 ret = -EIO; 969 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 970 status); 971 break; 972 } 973 return ret; 974 } 975 976 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 977 { 978 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 979 mvm->cfg->base_params->wd_timeout : 980 IWL_WATCHDOG_DISABLED; 981 int ret; 982 983 lockdep_assert_held(&mvm->mutex); 984 985 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 986 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, 987 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 988 989 /* Allocate aux station and assign to it the aux queue */ 990 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 991 NL80211_IFTYPE_UNSPECIFIED); 992 if (ret) 993 return ret; 994 995 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 996 MAC_INDEX_AUX, 0); 997 998 if (ret) 999 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1000 return ret; 1001 } 1002 1003 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1004 { 1005 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1006 1007 lockdep_assert_held(&mvm->mutex); 1008 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1009 mvmvif->id, 0); 1010 } 1011 1012 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1013 { 1014 int ret; 1015 1016 lockdep_assert_held(&mvm->mutex); 1017 1018 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1019 if (ret) 1020 IWL_WARN(mvm, "Failed sending remove station\n"); 1021 1022 return ret; 1023 } 1024 1025 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1026 { 1027 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1028 } 1029 1030 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1031 { 1032 lockdep_assert_held(&mvm->mutex); 1033 1034 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1035 } 1036 1037 /* 1038 * Send the add station command for the vif's broadcast station. 1039 * Assumes that the station was already allocated. 1040 * 1041 * @mvm: the mvm component 1042 * @vif: the interface to which the broadcast station is added 1043 * @bsta: the broadcast station to add. 1044 */ 1045 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1046 { 1047 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1048 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1049 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1050 const u8 *baddr = _baddr; 1051 1052 lockdep_assert_held(&mvm->mutex); 1053 1054 if (iwl_mvm_is_dqa_supported(mvm)) { 1055 struct iwl_trans_txq_scd_cfg cfg = { 1056 .fifo = IWL_MVM_TX_FIFO_VO, 1057 .sta_id = mvmvif->bcast_sta.sta_id, 1058 .tid = IWL_MAX_TID_COUNT, 1059 .aggregate = false, 1060 .frame_limit = IWL_FRAME_LIMIT, 1061 }; 1062 unsigned int wdg_timeout = 1063 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1064 int queue; 1065 1066 if ((vif->type == NL80211_IFTYPE_AP) && 1067 (mvmvif->bcast_sta.tfd_queue_msk & 1068 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE))) 1069 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 1070 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) && 1071 (mvmvif->bcast_sta.tfd_queue_msk & 1072 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE))) 1073 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE; 1074 else if (WARN(1, "Missed required TXQ for adding bcast STA\n")) 1075 return -EINVAL; 1076 1077 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg, 1078 wdg_timeout); 1079 } 1080 1081 if (vif->type == NL80211_IFTYPE_ADHOC) 1082 baddr = vif->bss_conf.bssid; 1083 1084 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) 1085 return -ENOSPC; 1086 1087 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1088 mvmvif->id, mvmvif->color); 1089 } 1090 1091 /* Send the FW a request to remove the station from it's internal data 1092 * structures, but DO NOT remove the entry from the local data structures. */ 1093 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1094 { 1095 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1096 int ret; 1097 1098 lockdep_assert_held(&mvm->mutex); 1099 1100 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1101 if (ret) 1102 IWL_WARN(mvm, "Failed sending remove station\n"); 1103 return ret; 1104 } 1105 1106 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1107 { 1108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1109 u32 qmask = 0; 1110 1111 lockdep_assert_held(&mvm->mutex); 1112 1113 if (!iwl_mvm_is_dqa_supported(mvm)) 1114 qmask = iwl_mvm_mac_get_queues_mask(vif); 1115 1116 if (vif->type == NL80211_IFTYPE_AP) { 1117 /* 1118 * The firmware defines the TFD queue mask to only be relevant 1119 * for *unicast* queues, so the multicast (CAB) queue shouldn't 1120 * be included. 1121 */ 1122 qmask &= ~BIT(vif->cab_queue); 1123 1124 if (iwl_mvm_is_dqa_supported(mvm)) 1125 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE); 1126 } else if (iwl_mvm_is_dqa_supported(mvm) && 1127 vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1128 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE); 1129 } 1130 1131 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, 1132 ieee80211_vif_type_p2p(vif)); 1133 } 1134 1135 /* Allocate a new station entry for the broadcast station to the given vif, 1136 * and send it to the FW. 1137 * Note that each P2P mac should have its own broadcast station. 1138 * 1139 * @mvm: the mvm component 1140 * @vif: the interface to which the broadcast station is added 1141 * @bsta: the broadcast station to add. */ 1142 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1143 { 1144 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1145 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1146 int ret; 1147 1148 lockdep_assert_held(&mvm->mutex); 1149 1150 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1151 if (ret) 1152 return ret; 1153 1154 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 1155 1156 if (ret) 1157 iwl_mvm_dealloc_int_sta(mvm, bsta); 1158 1159 return ret; 1160 } 1161 1162 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1163 { 1164 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1165 1166 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 1167 } 1168 1169 /* 1170 * Send the FW a request to remove the station from it's internal data 1171 * structures, and in addition remove it from the local data structure. 1172 */ 1173 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1174 { 1175 int ret; 1176 1177 lockdep_assert_held(&mvm->mutex); 1178 1179 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 1180 1181 iwl_mvm_dealloc_bcast_sta(mvm, vif); 1182 1183 return ret; 1184 } 1185 1186 #define IWL_MAX_RX_BA_SESSIONS 16 1187 1188 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 1189 { 1190 struct iwl_mvm_delba_notif notif = { 1191 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 1192 .metadata.sync = 1, 1193 .delba.baid = baid, 1194 }; 1195 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 1196 }; 1197 1198 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 1199 struct iwl_mvm_baid_data *data) 1200 { 1201 int i; 1202 1203 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 1204 1205 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 1206 int j; 1207 struct iwl_mvm_reorder_buffer *reorder_buf = 1208 &data->reorder_buf[i]; 1209 1210 spin_lock_bh(&reorder_buf->lock); 1211 if (likely(!reorder_buf->num_stored)) { 1212 spin_unlock_bh(&reorder_buf->lock); 1213 continue; 1214 } 1215 1216 /* 1217 * This shouldn't happen in regular DELBA since the internal 1218 * delBA notification should trigger a release of all frames in 1219 * the reorder buffer. 1220 */ 1221 WARN_ON(1); 1222 1223 for (j = 0; j < reorder_buf->buf_size; j++) 1224 __skb_queue_purge(&reorder_buf->entries[j]); 1225 /* 1226 * Prevent timer re-arm. This prevents a very far fetched case 1227 * where we timed out on the notification. There may be prior 1228 * RX frames pending in the RX queue before the notification 1229 * that might get processed between now and the actual deletion 1230 * and we would re-arm the timer although we are deleting the 1231 * reorder buffer. 1232 */ 1233 reorder_buf->removed = true; 1234 spin_unlock_bh(&reorder_buf->lock); 1235 del_timer_sync(&reorder_buf->reorder_timer); 1236 } 1237 } 1238 1239 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 1240 u32 sta_id, 1241 struct iwl_mvm_baid_data *data, 1242 u16 ssn, u8 buf_size) 1243 { 1244 int i; 1245 1246 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 1247 struct iwl_mvm_reorder_buffer *reorder_buf = 1248 &data->reorder_buf[i]; 1249 int j; 1250 1251 reorder_buf->num_stored = 0; 1252 reorder_buf->head_sn = ssn; 1253 reorder_buf->buf_size = buf_size; 1254 /* rx reorder timer */ 1255 reorder_buf->reorder_timer.function = 1256 iwl_mvm_reorder_timer_expired; 1257 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 1258 init_timer(&reorder_buf->reorder_timer); 1259 spin_lock_init(&reorder_buf->lock); 1260 reorder_buf->mvm = mvm; 1261 reorder_buf->queue = i; 1262 reorder_buf->sta_id = sta_id; 1263 for (j = 0; j < reorder_buf->buf_size; j++) 1264 __skb_queue_head_init(&reorder_buf->entries[j]); 1265 } 1266 } 1267 1268 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 1269 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 1270 { 1271 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1272 struct iwl_mvm_add_sta_cmd cmd = {}; 1273 struct iwl_mvm_baid_data *baid_data = NULL; 1274 int ret; 1275 u32 status; 1276 1277 lockdep_assert_held(&mvm->mutex); 1278 1279 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 1280 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 1281 return -ENOSPC; 1282 } 1283 1284 if (iwl_mvm_has_new_rx_api(mvm) && start) { 1285 /* 1286 * Allocate here so if allocation fails we can bail out early 1287 * before starting the BA session in the firmware 1288 */ 1289 baid_data = kzalloc(sizeof(*baid_data) + 1290 mvm->trans->num_rx_queues * 1291 sizeof(baid_data->reorder_buf[0]), 1292 GFP_KERNEL); 1293 if (!baid_data) 1294 return -ENOMEM; 1295 } 1296 1297 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 1298 cmd.sta_id = mvm_sta->sta_id; 1299 cmd.add_modify = STA_MODE_MODIFY; 1300 if (start) { 1301 cmd.add_immediate_ba_tid = (u8) tid; 1302 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 1303 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 1304 } else { 1305 cmd.remove_immediate_ba_tid = (u8) tid; 1306 } 1307 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 1308 STA_MODIFY_REMOVE_BA_TID; 1309 1310 status = ADD_STA_SUCCESS; 1311 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1312 iwl_mvm_add_sta_cmd_size(mvm), 1313 &cmd, &status); 1314 if (ret) 1315 goto out_free; 1316 1317 switch (status & IWL_ADD_STA_STATUS_MASK) { 1318 case ADD_STA_SUCCESS: 1319 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n", 1320 start ? "start" : "stopp"); 1321 break; 1322 case ADD_STA_IMMEDIATE_BA_FAILURE: 1323 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 1324 ret = -ENOSPC; 1325 break; 1326 default: 1327 ret = -EIO; 1328 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 1329 start ? "start" : "stopp", status); 1330 break; 1331 } 1332 1333 if (ret) 1334 goto out_free; 1335 1336 if (start) { 1337 u8 baid; 1338 1339 mvm->rx_ba_sessions++; 1340 1341 if (!iwl_mvm_has_new_rx_api(mvm)) 1342 return 0; 1343 1344 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 1345 ret = -EINVAL; 1346 goto out_free; 1347 } 1348 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 1349 IWL_ADD_STA_BAID_SHIFT); 1350 baid_data->baid = baid; 1351 baid_data->timeout = timeout; 1352 baid_data->last_rx = jiffies; 1353 init_timer(&baid_data->session_timer); 1354 baid_data->session_timer.function = 1355 iwl_mvm_rx_agg_session_expired; 1356 baid_data->session_timer.data = 1357 (unsigned long)&mvm->baid_map[baid]; 1358 baid_data->mvm = mvm; 1359 baid_data->tid = tid; 1360 baid_data->sta_id = mvm_sta->sta_id; 1361 1362 mvm_sta->tid_to_baid[tid] = baid; 1363 if (timeout) 1364 mod_timer(&baid_data->session_timer, 1365 TU_TO_EXP_TIME(timeout * 2)); 1366 1367 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 1368 baid_data, ssn, buf_size); 1369 /* 1370 * protect the BA data with RCU to cover a case where our 1371 * internal RX sync mechanism will timeout (not that it's 1372 * supposed to happen) and we will free the session data while 1373 * RX is being processed in parallel 1374 */ 1375 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 1376 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 1377 } else if (mvm->rx_ba_sessions > 0) { 1378 u8 baid = mvm_sta->tid_to_baid[tid]; 1379 1380 /* check that restart flow didn't zero the counter */ 1381 mvm->rx_ba_sessions--; 1382 if (!iwl_mvm_has_new_rx_api(mvm)) 1383 return 0; 1384 1385 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1386 return -EINVAL; 1387 1388 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 1389 if (WARN_ON(!baid_data)) 1390 return -EINVAL; 1391 1392 /* synchronize all rx queues so we can safely delete */ 1393 iwl_mvm_free_reorder(mvm, baid_data); 1394 del_timer_sync(&baid_data->session_timer); 1395 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 1396 kfree_rcu(baid_data, rcu_head); 1397 } 1398 return 0; 1399 1400 out_free: 1401 kfree(baid_data); 1402 return ret; 1403 } 1404 1405 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 1406 int tid, u8 queue, bool start) 1407 { 1408 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1409 struct iwl_mvm_add_sta_cmd cmd = {}; 1410 int ret; 1411 u32 status; 1412 1413 lockdep_assert_held(&mvm->mutex); 1414 1415 if (start) { 1416 mvm_sta->tfd_queue_msk |= BIT(queue); 1417 mvm_sta->tid_disable_agg &= ~BIT(tid); 1418 } else { 1419 /* In DQA-mode the queue isn't removed on agg termination */ 1420 if (!iwl_mvm_is_dqa_supported(mvm)) 1421 mvm_sta->tfd_queue_msk &= ~BIT(queue); 1422 mvm_sta->tid_disable_agg |= BIT(tid); 1423 } 1424 1425 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 1426 cmd.sta_id = mvm_sta->sta_id; 1427 cmd.add_modify = STA_MODE_MODIFY; 1428 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; 1429 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 1430 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 1431 1432 status = ADD_STA_SUCCESS; 1433 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1434 iwl_mvm_add_sta_cmd_size(mvm), 1435 &cmd, &status); 1436 if (ret) 1437 return ret; 1438 1439 switch (status & IWL_ADD_STA_STATUS_MASK) { 1440 case ADD_STA_SUCCESS: 1441 break; 1442 default: 1443 ret = -EIO; 1444 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 1445 start ? "start" : "stopp", status); 1446 break; 1447 } 1448 1449 return ret; 1450 } 1451 1452 const u8 tid_to_mac80211_ac[] = { 1453 IEEE80211_AC_BE, 1454 IEEE80211_AC_BK, 1455 IEEE80211_AC_BK, 1456 IEEE80211_AC_BE, 1457 IEEE80211_AC_VI, 1458 IEEE80211_AC_VI, 1459 IEEE80211_AC_VO, 1460 IEEE80211_AC_VO, 1461 }; 1462 1463 static const u8 tid_to_ucode_ac[] = { 1464 AC_BE, 1465 AC_BK, 1466 AC_BK, 1467 AC_BE, 1468 AC_VI, 1469 AC_VI, 1470 AC_VO, 1471 AC_VO, 1472 }; 1473 1474 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1475 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 1476 { 1477 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1478 struct iwl_mvm_tid_data *tid_data; 1479 int txq_id; 1480 int ret; 1481 1482 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1483 return -EINVAL; 1484 1485 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 1486 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 1487 mvmsta->tid_data[tid].state); 1488 return -ENXIO; 1489 } 1490 1491 lockdep_assert_held(&mvm->mutex); 1492 1493 spin_lock_bh(&mvmsta->lock); 1494 1495 /* possible race condition - we entered D0i3 while starting agg */ 1496 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 1497 spin_unlock_bh(&mvmsta->lock); 1498 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 1499 return -EIO; 1500 } 1501 1502 spin_lock_bh(&mvm->queue_info_lock); 1503 1504 /* 1505 * Note the possible cases: 1506 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 1507 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 1508 * one and mark it as reserved 1509 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 1510 * non-DQA mode, since the TXQ hasn't yet been allocated 1511 */ 1512 txq_id = mvmsta->tid_data[tid].txq_id; 1513 if (!iwl_mvm_is_dqa_supported(mvm) || 1514 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 1515 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue, 1516 mvm->last_agg_queue); 1517 if (txq_id < 0) { 1518 ret = txq_id; 1519 spin_unlock_bh(&mvm->queue_info_lock); 1520 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 1521 goto release_locks; 1522 } 1523 1524 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 1525 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 1526 } 1527 spin_unlock_bh(&mvm->queue_info_lock); 1528 1529 IWL_DEBUG_TX_QUEUES(mvm, 1530 "AGG for tid %d will be on queue #%d\n", 1531 tid, txq_id); 1532 1533 tid_data = &mvmsta->tid_data[tid]; 1534 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1535 tid_data->txq_id = txq_id; 1536 *ssn = tid_data->ssn; 1537 1538 IWL_DEBUG_TX_QUEUES(mvm, 1539 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 1540 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 1541 tid_data->next_reclaimed); 1542 1543 if (tid_data->ssn == tid_data->next_reclaimed) { 1544 tid_data->state = IWL_AGG_STARTING; 1545 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1546 } else { 1547 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 1548 } 1549 1550 ret = 0; 1551 1552 release_locks: 1553 spin_unlock_bh(&mvmsta->lock); 1554 1555 return ret; 1556 } 1557 1558 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1559 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 1560 bool amsdu) 1561 { 1562 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1563 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1564 unsigned int wdg_timeout = 1565 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 1566 int queue, ret; 1567 bool alloc_queue = true; 1568 u16 ssn; 1569 1570 struct iwl_trans_txq_scd_cfg cfg = { 1571 .sta_id = mvmsta->sta_id, 1572 .tid = tid, 1573 .frame_limit = buf_size, 1574 .aggregate = true, 1575 }; 1576 1577 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 1578 != IWL_MAX_TID_COUNT); 1579 1580 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 1581 1582 spin_lock_bh(&mvmsta->lock); 1583 ssn = tid_data->ssn; 1584 queue = tid_data->txq_id; 1585 tid_data->state = IWL_AGG_ON; 1586 mvmsta->agg_tids |= BIT(tid); 1587 tid_data->ssn = 0xffff; 1588 tid_data->amsdu_in_ampdu_allowed = amsdu; 1589 spin_unlock_bh(&mvmsta->lock); 1590 1591 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 1592 1593 /* In DQA mode, the existing queue might need to be reconfigured */ 1594 if (iwl_mvm_is_dqa_supported(mvm)) { 1595 spin_lock_bh(&mvm->queue_info_lock); 1596 /* Maybe there is no need to even alloc a queue... */ 1597 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 1598 alloc_queue = false; 1599 spin_unlock_bh(&mvm->queue_info_lock); 1600 1601 /* 1602 * Only reconfig the SCD for the queue if the window size has 1603 * changed from current (become smaller) 1604 */ 1605 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 1606 /* 1607 * If reconfiguring an existing queue, it first must be 1608 * drained 1609 */ 1610 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 1611 BIT(queue)); 1612 if (ret) { 1613 IWL_ERR(mvm, 1614 "Error draining queue before reconfig\n"); 1615 return ret; 1616 } 1617 1618 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 1619 mvmsta->sta_id, tid, 1620 buf_size, ssn); 1621 if (ret) { 1622 IWL_ERR(mvm, 1623 "Error reconfiguring TXQ #%d\n", queue); 1624 return ret; 1625 } 1626 } 1627 } 1628 1629 if (alloc_queue) 1630 iwl_mvm_enable_txq(mvm, queue, 1631 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 1632 &cfg, wdg_timeout); 1633 1634 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1635 if (ret) 1636 return -EIO; 1637 1638 /* No need to mark as reserved */ 1639 spin_lock_bh(&mvm->queue_info_lock); 1640 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1641 spin_unlock_bh(&mvm->queue_info_lock); 1642 1643 /* 1644 * Even though in theory the peer could have different 1645 * aggregation reorder buffer sizes for different sessions, 1646 * our ucode doesn't allow for that and has a global limit 1647 * for each station. Therefore, use the minimum of all the 1648 * aggregation sessions and our default value. 1649 */ 1650 mvmsta->max_agg_bufsize = 1651 min(mvmsta->max_agg_bufsize, buf_size); 1652 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 1653 1654 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 1655 sta->addr, tid); 1656 1657 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 1658 } 1659 1660 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1661 struct ieee80211_sta *sta, u16 tid) 1662 { 1663 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1664 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1665 u16 txq_id; 1666 int err; 1667 1668 1669 /* 1670 * If mac80211 is cleaning its state, then say that we finished since 1671 * our state has been cleared anyway. 1672 */ 1673 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1674 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1675 return 0; 1676 } 1677 1678 spin_lock_bh(&mvmsta->lock); 1679 1680 txq_id = tid_data->txq_id; 1681 1682 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 1683 mvmsta->sta_id, tid, txq_id, tid_data->state); 1684 1685 mvmsta->agg_tids &= ~BIT(tid); 1686 1687 spin_lock_bh(&mvm->queue_info_lock); 1688 /* 1689 * The TXQ is marked as reserved only if no traffic came through yet 1690 * This means no traffic has been sent on this TID (agg'd or not), so 1691 * we no longer have use for the queue. Since it hasn't even been 1692 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 1693 * free. 1694 */ 1695 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 1696 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 1697 spin_unlock_bh(&mvm->queue_info_lock); 1698 1699 switch (tid_data->state) { 1700 case IWL_AGG_ON: 1701 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1702 1703 IWL_DEBUG_TX_QUEUES(mvm, 1704 "ssn = %d, next_recl = %d\n", 1705 tid_data->ssn, tid_data->next_reclaimed); 1706 1707 /* There are still packets for this RA / TID in the HW */ 1708 if (tid_data->ssn != tid_data->next_reclaimed) { 1709 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; 1710 err = 0; 1711 break; 1712 } 1713 1714 tid_data->ssn = 0xffff; 1715 tid_data->state = IWL_AGG_OFF; 1716 spin_unlock_bh(&mvmsta->lock); 1717 1718 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1719 1720 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 1721 1722 if (!iwl_mvm_is_dqa_supported(mvm)) { 1723 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 1724 1725 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0); 1726 } 1727 return 0; 1728 case IWL_AGG_STARTING: 1729 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1730 /* 1731 * The agg session has been stopped before it was set up. This 1732 * can happen when the AddBA timer times out for example. 1733 */ 1734 1735 /* No barriers since we are under mutex */ 1736 lockdep_assert_held(&mvm->mutex); 1737 1738 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1739 tid_data->state = IWL_AGG_OFF; 1740 err = 0; 1741 break; 1742 default: 1743 IWL_ERR(mvm, 1744 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 1745 mvmsta->sta_id, tid, tid_data->state); 1746 IWL_ERR(mvm, 1747 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 1748 err = -EINVAL; 1749 } 1750 1751 spin_unlock_bh(&mvmsta->lock); 1752 1753 return err; 1754 } 1755 1756 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1757 struct ieee80211_sta *sta, u16 tid) 1758 { 1759 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1760 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1761 u16 txq_id; 1762 enum iwl_mvm_agg_state old_state; 1763 1764 /* 1765 * First set the agg state to OFF to avoid calling 1766 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 1767 */ 1768 spin_lock_bh(&mvmsta->lock); 1769 txq_id = tid_data->txq_id; 1770 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 1771 mvmsta->sta_id, tid, txq_id, tid_data->state); 1772 old_state = tid_data->state; 1773 tid_data->state = IWL_AGG_OFF; 1774 mvmsta->agg_tids &= ~BIT(tid); 1775 spin_unlock_bh(&mvmsta->lock); 1776 1777 spin_lock_bh(&mvm->queue_info_lock); 1778 /* 1779 * The TXQ is marked as reserved only if no traffic came through yet 1780 * This means no traffic has been sent on this TID (agg'd or not), so 1781 * we no longer have use for the queue. Since it hasn't even been 1782 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 1783 * free. 1784 */ 1785 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 1786 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 1787 spin_unlock_bh(&mvm->queue_info_lock); 1788 1789 if (old_state >= IWL_AGG_ON) { 1790 iwl_mvm_drain_sta(mvm, mvmsta, true); 1791 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 1792 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 1793 iwl_trans_wait_tx_queue_empty(mvm->trans, 1794 mvmsta->tfd_queue_msk); 1795 iwl_mvm_drain_sta(mvm, mvmsta, false); 1796 1797 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 1798 1799 if (!iwl_mvm_is_dqa_supported(mvm)) { 1800 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 1801 1802 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue, 1803 tid, 0); 1804 } 1805 } 1806 1807 return 0; 1808 } 1809 1810 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 1811 { 1812 int i, max = -1, max_offs = -1; 1813 1814 lockdep_assert_held(&mvm->mutex); 1815 1816 /* Pick the unused key offset with the highest 'deleted' 1817 * counter. Every time a key is deleted, all the counters 1818 * are incremented and the one that was just deleted is 1819 * reset to zero. Thus, the highest counter is the one 1820 * that was deleted longest ago. Pick that one. 1821 */ 1822 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 1823 if (test_bit(i, mvm->fw_key_table)) 1824 continue; 1825 if (mvm->fw_key_deleted[i] > max) { 1826 max = mvm->fw_key_deleted[i]; 1827 max_offs = i; 1828 } 1829 } 1830 1831 if (max_offs < 0) 1832 return STA_KEY_IDX_INVALID; 1833 1834 return max_offs; 1835 } 1836 1837 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 1838 struct ieee80211_vif *vif, 1839 struct ieee80211_sta *sta) 1840 { 1841 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1842 1843 if (sta) 1844 return iwl_mvm_sta_from_mac80211(sta); 1845 1846 /* 1847 * The device expects GTKs for station interfaces to be 1848 * installed as GTKs for the AP station. If we have no 1849 * station ID, then use AP's station ID. 1850 */ 1851 if (vif->type == NL80211_IFTYPE_STATION && 1852 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 1853 u8 sta_id = mvmvif->ap_sta_id; 1854 1855 /* 1856 * It is possible that the 'sta' parameter is NULL, 1857 * for example when a GTK is removed - the sta_id will then 1858 * be the AP ID, and no station was passed by mac80211. 1859 */ 1860 return iwl_mvm_sta_from_staid_protected(mvm, sta_id); 1861 } 1862 1863 return NULL; 1864 } 1865 1866 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 1867 struct iwl_mvm_sta *mvm_sta, 1868 struct ieee80211_key_conf *keyconf, bool mcast, 1869 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 1870 u8 key_offset) 1871 { 1872 struct iwl_mvm_add_sta_key_cmd cmd = {}; 1873 __le16 key_flags; 1874 int ret; 1875 u32 status; 1876 u16 keyidx; 1877 int i; 1878 u8 sta_id = mvm_sta->sta_id; 1879 1880 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 1881 STA_KEY_FLG_KEYID_MSK; 1882 key_flags = cpu_to_le16(keyidx); 1883 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 1884 1885 switch (keyconf->cipher) { 1886 case WLAN_CIPHER_SUITE_TKIP: 1887 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 1888 cmd.tkip_rx_tsc_byte2 = tkip_iv32; 1889 for (i = 0; i < 5; i++) 1890 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); 1891 memcpy(cmd.key, keyconf->key, keyconf->keylen); 1892 break; 1893 case WLAN_CIPHER_SUITE_CCMP: 1894 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 1895 memcpy(cmd.key, keyconf->key, keyconf->keylen); 1896 break; 1897 case WLAN_CIPHER_SUITE_WEP104: 1898 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 1899 /* fall through */ 1900 case WLAN_CIPHER_SUITE_WEP40: 1901 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 1902 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); 1903 break; 1904 default: 1905 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 1906 memcpy(cmd.key, keyconf->key, keyconf->keylen); 1907 } 1908 1909 if (mcast) 1910 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 1911 1912 cmd.key_offset = key_offset; 1913 cmd.key_flags = key_flags; 1914 cmd.sta_id = sta_id; 1915 1916 status = ADD_STA_SUCCESS; 1917 if (cmd_flags & CMD_ASYNC) 1918 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, 1919 sizeof(cmd), &cmd); 1920 else 1921 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 1922 &cmd, &status); 1923 1924 switch (status) { 1925 case ADD_STA_SUCCESS: 1926 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 1927 break; 1928 default: 1929 ret = -EIO; 1930 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 1931 break; 1932 } 1933 1934 return ret; 1935 } 1936 1937 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 1938 struct ieee80211_key_conf *keyconf, 1939 u8 sta_id, bool remove_key) 1940 { 1941 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 1942 1943 /* verify the key details match the required command's expectations */ 1944 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) || 1945 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 1946 (keyconf->keyidx != 4 && keyconf->keyidx != 5))) 1947 return -EINVAL; 1948 1949 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 1950 igtk_cmd.sta_id = cpu_to_le32(sta_id); 1951 1952 if (remove_key) { 1953 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 1954 } else { 1955 struct ieee80211_key_seq seq; 1956 const u8 *pn; 1957 1958 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen); 1959 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 1960 pn = seq.aes_cmac.pn; 1961 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 1962 ((u64) pn[4] << 8) | 1963 ((u64) pn[3] << 16) | 1964 ((u64) pn[2] << 24) | 1965 ((u64) pn[1] << 32) | 1966 ((u64) pn[0] << 40)); 1967 } 1968 1969 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 1970 remove_key ? "removing" : "installing", 1971 igtk_cmd.sta_id); 1972 1973 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 1974 sizeof(igtk_cmd), &igtk_cmd); 1975 } 1976 1977 1978 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 1979 struct ieee80211_vif *vif, 1980 struct ieee80211_sta *sta) 1981 { 1982 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1983 1984 if (sta) 1985 return sta->addr; 1986 1987 if (vif->type == NL80211_IFTYPE_STATION && 1988 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 1989 u8 sta_id = mvmvif->ap_sta_id; 1990 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1991 lockdep_is_held(&mvm->mutex)); 1992 return sta->addr; 1993 } 1994 1995 1996 return NULL; 1997 } 1998 1999 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 2000 struct ieee80211_vif *vif, 2001 struct ieee80211_sta *sta, 2002 struct ieee80211_key_conf *keyconf, 2003 u8 key_offset, 2004 bool mcast) 2005 { 2006 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2007 int ret; 2008 const u8 *addr; 2009 struct ieee80211_key_seq seq; 2010 u16 p1k[5]; 2011 2012 switch (keyconf->cipher) { 2013 case WLAN_CIPHER_SUITE_TKIP: 2014 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 2015 /* get phase 1 key from mac80211 */ 2016 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2017 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 2018 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2019 seq.tkip.iv32, p1k, 0, key_offset); 2020 break; 2021 case WLAN_CIPHER_SUITE_CCMP: 2022 case WLAN_CIPHER_SUITE_WEP40: 2023 case WLAN_CIPHER_SUITE_WEP104: 2024 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2025 0, NULL, 0, key_offset); 2026 break; 2027 default: 2028 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2029 0, NULL, 0, key_offset); 2030 } 2031 2032 return ret; 2033 } 2034 2035 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2036 struct ieee80211_key_conf *keyconf, 2037 bool mcast) 2038 { 2039 struct iwl_mvm_add_sta_key_cmd cmd = {}; 2040 __le16 key_flags; 2041 int ret; 2042 u32 status; 2043 2044 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2045 STA_KEY_FLG_KEYID_MSK); 2046 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2047 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2048 2049 if (mcast) 2050 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2051 2052 cmd.key_flags = key_flags; 2053 cmd.key_offset = keyconf->hw_key_idx; 2054 cmd.sta_id = sta_id; 2055 2056 status = ADD_STA_SUCCESS; 2057 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 2058 &cmd, &status); 2059 2060 switch (status) { 2061 case ADD_STA_SUCCESS: 2062 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2063 break; 2064 default: 2065 ret = -EIO; 2066 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2067 break; 2068 } 2069 2070 return ret; 2071 } 2072 2073 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 2074 struct ieee80211_vif *vif, 2075 struct ieee80211_sta *sta, 2076 struct ieee80211_key_conf *keyconf, 2077 u8 key_offset) 2078 { 2079 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 2080 struct iwl_mvm_sta *mvm_sta; 2081 u8 sta_id; 2082 int ret; 2083 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 2084 2085 lockdep_assert_held(&mvm->mutex); 2086 2087 /* Get the station id from the mvm local station table */ 2088 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 2089 if (!mvm_sta) { 2090 IWL_ERR(mvm, "Failed to find station\n"); 2091 return -EINVAL; 2092 } 2093 sta_id = mvm_sta->sta_id; 2094 2095 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { 2096 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 2097 goto end; 2098 } 2099 2100 /* 2101 * It is possible that the 'sta' parameter is NULL, and thus 2102 * there is a need to retrieve the sta from the local station table. 2103 */ 2104 if (!sta) { 2105 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 2106 lockdep_is_held(&mvm->mutex)); 2107 if (IS_ERR_OR_NULL(sta)) { 2108 IWL_ERR(mvm, "Invalid station id\n"); 2109 return -EINVAL; 2110 } 2111 } 2112 2113 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 2114 return -EINVAL; 2115 2116 /* If the key_offset is not pre-assigned, we need to find a 2117 * new offset to use. In normal cases, the offset is not 2118 * pre-assigned, but during HW_RESTART we want to reuse the 2119 * same indices, so we pass them when this function is called. 2120 * 2121 * In D3 entry, we need to hardcoded the indices (because the 2122 * firmware hardcodes the PTK offset to 0). In this case, we 2123 * need to make sure we don't overwrite the hw_key_idx in the 2124 * keyconf structure, because otherwise we cannot configure 2125 * the original ones back when resuming. 2126 */ 2127 if (key_offset == STA_KEY_IDX_INVALID) { 2128 key_offset = iwl_mvm_set_fw_key_idx(mvm); 2129 if (key_offset == STA_KEY_IDX_INVALID) 2130 return -ENOSPC; 2131 keyconf->hw_key_idx = key_offset; 2132 } 2133 2134 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 2135 if (ret) 2136 goto end; 2137 2138 /* 2139 * For WEP, the same key is used for multicast and unicast. Upload it 2140 * again, using the same key offset, and now pointing the other one 2141 * to the same key slot (offset). 2142 * If this fails, remove the original as well. 2143 */ 2144 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 2145 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { 2146 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 2147 key_offset, !mcast); 2148 if (ret) { 2149 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 2150 goto end; 2151 } 2152 } 2153 2154 __set_bit(key_offset, mvm->fw_key_table); 2155 2156 end: 2157 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 2158 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 2159 sta ? sta->addr : zero_addr, ret); 2160 return ret; 2161 } 2162 2163 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 2164 struct ieee80211_vif *vif, 2165 struct ieee80211_sta *sta, 2166 struct ieee80211_key_conf *keyconf) 2167 { 2168 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 2169 struct iwl_mvm_sta *mvm_sta; 2170 u8 sta_id = IWL_MVM_STATION_COUNT; 2171 int ret, i; 2172 2173 lockdep_assert_held(&mvm->mutex); 2174 2175 /* Get the station from the mvm local station table */ 2176 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 2177 2178 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 2179 keyconf->keyidx, sta_id); 2180 2181 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) 2182 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 2183 2184 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 2185 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 2186 keyconf->hw_key_idx); 2187 return -ENOENT; 2188 } 2189 2190 /* track which key was deleted last */ 2191 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2192 if (mvm->fw_key_deleted[i] < U8_MAX) 2193 mvm->fw_key_deleted[i]++; 2194 } 2195 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 2196 2197 if (!mvm_sta) { 2198 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 2199 return 0; 2200 } 2201 2202 sta_id = mvm_sta->sta_id; 2203 2204 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 2205 if (ret) 2206 return ret; 2207 2208 /* delete WEP key twice to get rid of (now useless) offset */ 2209 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 2210 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 2211 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 2212 2213 return ret; 2214 } 2215 2216 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 2217 struct ieee80211_vif *vif, 2218 struct ieee80211_key_conf *keyconf, 2219 struct ieee80211_sta *sta, u32 iv32, 2220 u16 *phase1key) 2221 { 2222 struct iwl_mvm_sta *mvm_sta; 2223 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 2224 2225 rcu_read_lock(); 2226 2227 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 2228 if (WARN_ON_ONCE(!mvm_sta)) 2229 goto unlock; 2230 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2231 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 2232 2233 unlock: 2234 rcu_read_unlock(); 2235 } 2236 2237 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 2238 struct ieee80211_sta *sta) 2239 { 2240 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2241 struct iwl_mvm_add_sta_cmd cmd = { 2242 .add_modify = STA_MODE_MODIFY, 2243 .sta_id = mvmsta->sta_id, 2244 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 2245 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 2246 }; 2247 int ret; 2248 2249 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 2250 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 2251 if (ret) 2252 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 2253 } 2254 2255 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 2256 struct ieee80211_sta *sta, 2257 enum ieee80211_frame_release_type reason, 2258 u16 cnt, u16 tids, bool more_data, 2259 bool agg) 2260 { 2261 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2262 struct iwl_mvm_add_sta_cmd cmd = { 2263 .add_modify = STA_MODE_MODIFY, 2264 .sta_id = mvmsta->sta_id, 2265 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 2266 .sleep_tx_count = cpu_to_le16(cnt), 2267 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 2268 }; 2269 int tid, ret; 2270 unsigned long _tids = tids; 2271 2272 /* convert TIDs to ACs - we don't support TSPEC so that's OK 2273 * Note that this field is reserved and unused by firmware not 2274 * supporting GO uAPSD, so it's safe to always do this. 2275 */ 2276 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 2277 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 2278 2279 /* If we're releasing frames from aggregation queues then check if the 2280 * all queues combined that we're releasing frames from have 2281 * - more frames than the service period, in which case more_data 2282 * needs to be set 2283 * - fewer than 'cnt' frames, in which case we need to adjust the 2284 * firmware command (but do that unconditionally) 2285 */ 2286 if (agg) { 2287 int remaining = cnt; 2288 int sleep_tx_count; 2289 2290 spin_lock_bh(&mvmsta->lock); 2291 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 2292 struct iwl_mvm_tid_data *tid_data; 2293 u16 n_queued; 2294 2295 tid_data = &mvmsta->tid_data[tid]; 2296 if (WARN(tid_data->state != IWL_AGG_ON && 2297 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, 2298 "TID %d state is %d\n", 2299 tid, tid_data->state)) { 2300 spin_unlock_bh(&mvmsta->lock); 2301 ieee80211_sta_eosp(sta); 2302 return; 2303 } 2304 2305 n_queued = iwl_mvm_tid_queued(tid_data); 2306 if (n_queued > remaining) { 2307 more_data = true; 2308 remaining = 0; 2309 break; 2310 } 2311 remaining -= n_queued; 2312 } 2313 sleep_tx_count = cnt - remaining; 2314 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 2315 mvmsta->sleep_tx_count = sleep_tx_count; 2316 spin_unlock_bh(&mvmsta->lock); 2317 2318 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 2319 if (WARN_ON(cnt - remaining == 0)) { 2320 ieee80211_sta_eosp(sta); 2321 return; 2322 } 2323 } 2324 2325 /* Note: this is ignored by firmware not supporting GO uAPSD */ 2326 if (more_data) 2327 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); 2328 2329 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 2330 mvmsta->next_status_eosp = true; 2331 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); 2332 } else { 2333 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); 2334 } 2335 2336 /* block the Tx queues until the FW updated the sleep Tx count */ 2337 iwl_trans_block_txq_ptrs(mvm->trans, true); 2338 2339 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 2340 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 2341 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 2342 if (ret) 2343 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 2344 } 2345 2346 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 2347 struct iwl_rx_cmd_buffer *rxb) 2348 { 2349 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2350 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 2351 struct ieee80211_sta *sta; 2352 u32 sta_id = le32_to_cpu(notif->sta_id); 2353 2354 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 2355 return; 2356 2357 rcu_read_lock(); 2358 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 2359 if (!IS_ERR_OR_NULL(sta)) 2360 ieee80211_sta_eosp(sta); 2361 rcu_read_unlock(); 2362 } 2363 2364 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 2365 struct iwl_mvm_sta *mvmsta, bool disable) 2366 { 2367 struct iwl_mvm_add_sta_cmd cmd = { 2368 .add_modify = STA_MODE_MODIFY, 2369 .sta_id = mvmsta->sta_id, 2370 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 2371 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 2372 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 2373 }; 2374 int ret; 2375 2376 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 2377 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 2378 if (ret) 2379 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 2380 } 2381 2382 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 2383 struct ieee80211_sta *sta, 2384 bool disable) 2385 { 2386 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2387 2388 spin_lock_bh(&mvm_sta->lock); 2389 2390 if (mvm_sta->disable_tx == disable) { 2391 spin_unlock_bh(&mvm_sta->lock); 2392 return; 2393 } 2394 2395 mvm_sta->disable_tx = disable; 2396 2397 /* 2398 * Tell mac80211 to start/stop queuing tx for this station, 2399 * but don't stop queuing if there are still pending frames 2400 * for this station. 2401 */ 2402 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) 2403 ieee80211_sta_block_awake(mvm->hw, sta, disable); 2404 2405 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 2406 2407 spin_unlock_bh(&mvm_sta->lock); 2408 } 2409 2410 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 2411 struct iwl_mvm_vif *mvmvif, 2412 bool disable) 2413 { 2414 struct ieee80211_sta *sta; 2415 struct iwl_mvm_sta *mvm_sta; 2416 int i; 2417 2418 lockdep_assert_held(&mvm->mutex); 2419 2420 /* Block/unblock all the stations of the given mvmvif */ 2421 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { 2422 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 2423 lockdep_is_held(&mvm->mutex)); 2424 if (IS_ERR_OR_NULL(sta)) 2425 continue; 2426 2427 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2428 if (mvm_sta->mac_id_n_color != 2429 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 2430 continue; 2431 2432 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 2433 } 2434 } 2435 2436 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2437 { 2438 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2439 struct iwl_mvm_sta *mvmsta; 2440 2441 rcu_read_lock(); 2442 2443 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 2444 2445 if (!WARN_ON(!mvmsta)) 2446 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 2447 2448 rcu_read_unlock(); 2449 } 2450