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 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 #include <net/mac80211.h> 65 66 #include "mvm.h" 67 #include "sta.h" 68 #include "rs.h" 69 70 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm); 71 72 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 73 u32 sta_id, 74 struct ieee80211_key_conf *key, bool mcast, 75 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 76 u8 key_offset, bool mfp); 77 78 /* 79 * New version of ADD_STA_sta command added new fields at the end of the 80 * structure, so sending the size of the relevant API's structure is enough to 81 * support both API versions. 82 */ 83 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 84 { 85 if (iwl_mvm_has_new_rx_api(mvm) || 86 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 87 return sizeof(struct iwl_mvm_add_sta_cmd); 88 else 89 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 90 } 91 92 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 93 enum nl80211_iftype iftype) 94 { 95 int sta_id; 96 u32 reserved_ids = 0; 97 98 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 99 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 100 101 lockdep_assert_held(&mvm->mutex); 102 103 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 104 if (iftype != NL80211_IFTYPE_STATION) 105 reserved_ids = BIT(0); 106 107 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 108 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 109 if (BIT(sta_id) & reserved_ids) 110 continue; 111 112 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 113 lockdep_is_held(&mvm->mutex))) 114 return sta_id; 115 } 116 return IWL_MVM_INVALID_STA; 117 } 118 119 /* send station add/update command to firmware */ 120 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 121 bool update, unsigned int flags) 122 { 123 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 124 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 125 .sta_id = mvm_sta->sta_id, 126 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 127 .add_modify = update ? 1 : 0, 128 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 129 STA_FLG_MIMO_EN_MSK | 130 STA_FLG_RTS_MIMO_PROT), 131 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 132 }; 133 int ret; 134 u32 status; 135 u32 agg_size = 0, mpdu_dens = 0; 136 137 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 138 add_sta_cmd.station_type = mvm_sta->sta_type; 139 140 if (!update || (flags & STA_MODIFY_QUEUES)) { 141 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 142 143 if (!iwl_mvm_has_new_tx_api(mvm)) { 144 add_sta_cmd.tfd_queue_msk = 145 cpu_to_le32(mvm_sta->tfd_queue_msk); 146 147 if (flags & STA_MODIFY_QUEUES) 148 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 149 } else { 150 WARN_ON(flags & STA_MODIFY_QUEUES); 151 } 152 } 153 154 switch (sta->bandwidth) { 155 case IEEE80211_STA_RX_BW_160: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 157 /* fall through */ 158 case IEEE80211_STA_RX_BW_80: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 160 /* fall through */ 161 case IEEE80211_STA_RX_BW_40: 162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 163 /* fall through */ 164 case IEEE80211_STA_RX_BW_20: 165 if (sta->ht_cap.ht_supported) 166 add_sta_cmd.station_flags |= 167 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 168 break; 169 } 170 171 switch (sta->rx_nss) { 172 case 1: 173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 174 break; 175 case 2: 176 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 177 break; 178 case 3 ... 8: 179 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 180 break; 181 } 182 183 switch (sta->smps_mode) { 184 case IEEE80211_SMPS_AUTOMATIC: 185 case IEEE80211_SMPS_NUM_MODES: 186 WARN_ON(1); 187 break; 188 case IEEE80211_SMPS_STATIC: 189 /* override NSS */ 190 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 191 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 192 break; 193 case IEEE80211_SMPS_DYNAMIC: 194 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 195 break; 196 case IEEE80211_SMPS_OFF: 197 /* nothing */ 198 break; 199 } 200 201 if (sta->ht_cap.ht_supported) { 202 add_sta_cmd.station_flags_msk |= 203 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 204 STA_FLG_AGG_MPDU_DENS_MSK); 205 206 mpdu_dens = sta->ht_cap.ampdu_density; 207 } 208 209 if (sta->vht_cap.vht_supported) { 210 agg_size = sta->vht_cap.cap & 211 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 212 agg_size >>= 213 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 214 } else if (sta->ht_cap.ht_supported) { 215 agg_size = sta->ht_cap.ampdu_factor; 216 } 217 218 add_sta_cmd.station_flags |= 219 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 220 add_sta_cmd.station_flags |= 221 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 222 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 223 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 224 225 if (sta->wme) { 226 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 227 228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 229 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 230 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 231 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 232 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 233 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 234 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 235 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 236 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 237 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 238 } 239 240 status = ADD_STA_SUCCESS; 241 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 242 iwl_mvm_add_sta_cmd_size(mvm), 243 &add_sta_cmd, &status); 244 if (ret) 245 return ret; 246 247 switch (status & IWL_ADD_STA_STATUS_MASK) { 248 case ADD_STA_SUCCESS: 249 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 250 break; 251 default: 252 ret = -EIO; 253 IWL_ERR(mvm, "ADD_STA failed\n"); 254 break; 255 } 256 257 return ret; 258 } 259 260 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 261 { 262 struct iwl_mvm_baid_data *data = 263 from_timer(data, t, session_timer); 264 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 265 struct iwl_mvm_baid_data *ba_data; 266 struct ieee80211_sta *sta; 267 struct iwl_mvm_sta *mvm_sta; 268 unsigned long timeout; 269 270 rcu_read_lock(); 271 272 ba_data = rcu_dereference(*rcu_ptr); 273 274 if (WARN_ON(!ba_data)) 275 goto unlock; 276 277 if (!ba_data->timeout) 278 goto unlock; 279 280 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 281 if (time_is_after_jiffies(timeout)) { 282 mod_timer(&ba_data->session_timer, timeout); 283 goto unlock; 284 } 285 286 /* Timer expired */ 287 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 288 289 /* 290 * sta should be valid unless the following happens: 291 * The firmware asserts which triggers a reconfig flow, but 292 * the reconfig fails before we set the pointer to sta into 293 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 294 * A-MDPU and hence the timer continues to run. Then, the 295 * timer expires and sta is NULL. 296 */ 297 if (!sta) 298 goto unlock; 299 300 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 301 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 302 sta->addr, ba_data->tid); 303 unlock: 304 rcu_read_unlock(); 305 } 306 307 /* Disable aggregations for a bitmap of TIDs for a given station */ 308 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 309 unsigned long disable_agg_tids, 310 bool remove_queue) 311 { 312 struct iwl_mvm_add_sta_cmd cmd = {}; 313 struct ieee80211_sta *sta; 314 struct iwl_mvm_sta *mvmsta; 315 u32 status; 316 u8 sta_id; 317 int ret; 318 319 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 320 return -EINVAL; 321 322 spin_lock_bh(&mvm->queue_info_lock); 323 sta_id = mvm->queue_info[queue].ra_sta_id; 324 spin_unlock_bh(&mvm->queue_info_lock); 325 326 rcu_read_lock(); 327 328 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 329 330 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 331 rcu_read_unlock(); 332 return -EINVAL; 333 } 334 335 mvmsta = iwl_mvm_sta_from_mac80211(sta); 336 337 mvmsta->tid_disable_agg |= disable_agg_tids; 338 339 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 340 cmd.sta_id = mvmsta->sta_id; 341 cmd.add_modify = STA_MODE_MODIFY; 342 cmd.modify_mask = STA_MODIFY_QUEUES; 343 if (disable_agg_tids) 344 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 345 if (remove_queue) 346 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 347 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 348 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 349 350 rcu_read_unlock(); 351 352 /* Notify FW of queue removal from the STA queues */ 353 status = ADD_STA_SUCCESS; 354 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 355 iwl_mvm_add_sta_cmd_size(mvm), 356 &cmd, &status); 357 358 return ret; 359 } 360 361 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 362 { 363 struct ieee80211_sta *sta; 364 struct iwl_mvm_sta *mvmsta; 365 unsigned long tid_bitmap; 366 unsigned long agg_tids = 0; 367 u8 sta_id; 368 int tid; 369 370 lockdep_assert_held(&mvm->mutex); 371 372 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 373 return -EINVAL; 374 375 spin_lock_bh(&mvm->queue_info_lock); 376 sta_id = mvm->queue_info[queue].ra_sta_id; 377 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 378 spin_unlock_bh(&mvm->queue_info_lock); 379 380 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 381 lockdep_is_held(&mvm->mutex)); 382 383 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 384 return -EINVAL; 385 386 mvmsta = iwl_mvm_sta_from_mac80211(sta); 387 388 spin_lock_bh(&mvmsta->lock); 389 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 390 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 391 agg_tids |= BIT(tid); 392 } 393 spin_unlock_bh(&mvmsta->lock); 394 395 return agg_tids; 396 } 397 398 /* 399 * Remove a queue from a station's resources. 400 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 401 * doesn't disable the queue 402 */ 403 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 404 { 405 struct ieee80211_sta *sta; 406 struct iwl_mvm_sta *mvmsta; 407 unsigned long tid_bitmap; 408 unsigned long disable_agg_tids = 0; 409 u8 sta_id; 410 int tid; 411 412 lockdep_assert_held(&mvm->mutex); 413 414 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 415 return -EINVAL; 416 417 spin_lock_bh(&mvm->queue_info_lock); 418 sta_id = mvm->queue_info[queue].ra_sta_id; 419 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 420 spin_unlock_bh(&mvm->queue_info_lock); 421 422 rcu_read_lock(); 423 424 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 425 426 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 427 rcu_read_unlock(); 428 return 0; 429 } 430 431 mvmsta = iwl_mvm_sta_from_mac80211(sta); 432 433 spin_lock_bh(&mvmsta->lock); 434 /* Unmap MAC queues and TIDs from this queue */ 435 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 436 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 437 disable_agg_tids |= BIT(tid); 438 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 439 } 440 441 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 442 spin_unlock_bh(&mvmsta->lock); 443 444 rcu_read_unlock(); 445 446 return disable_agg_tids; 447 } 448 449 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 450 bool same_sta) 451 { 452 struct iwl_mvm_sta *mvmsta; 453 u8 txq_curr_ac, sta_id, tid; 454 unsigned long disable_agg_tids = 0; 455 int ret; 456 457 lockdep_assert_held(&mvm->mutex); 458 459 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 460 return -EINVAL; 461 462 spin_lock_bh(&mvm->queue_info_lock); 463 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 464 sta_id = mvm->queue_info[queue].ra_sta_id; 465 tid = mvm->queue_info[queue].txq_tid; 466 spin_unlock_bh(&mvm->queue_info_lock); 467 468 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 469 if (WARN_ON(!mvmsta)) 470 return -EINVAL; 471 472 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 473 /* Disable the queue */ 474 if (disable_agg_tids) 475 iwl_mvm_invalidate_sta_queue(mvm, queue, 476 disable_agg_tids, false); 477 478 ret = iwl_mvm_disable_txq(mvm, queue, 479 mvmsta->vif->hw_queue[txq_curr_ac], 480 tid, 0); 481 if (ret) { 482 /* Re-mark the inactive queue as inactive */ 483 spin_lock_bh(&mvm->queue_info_lock); 484 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 485 spin_unlock_bh(&mvm->queue_info_lock); 486 IWL_ERR(mvm, 487 "Failed to free inactive queue %d (ret=%d)\n", 488 queue, ret); 489 490 return ret; 491 } 492 493 /* If TXQ is allocated to another STA, update removal in FW */ 494 if (!same_sta) 495 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 496 497 return 0; 498 } 499 500 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 501 unsigned long tfd_queue_mask, u8 ac) 502 { 503 int queue = 0; 504 u8 ac_to_queue[IEEE80211_NUM_ACS]; 505 int i; 506 507 lockdep_assert_held(&mvm->queue_info_lock); 508 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 509 return -EINVAL; 510 511 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 512 513 /* See what ACs the existing queues for this STA have */ 514 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 515 /* Only DATA queues can be shared */ 516 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 517 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 518 continue; 519 520 /* Don't try and take queues being reconfigured */ 521 if (mvm->queue_info[queue].status == 522 IWL_MVM_QUEUE_RECONFIGURING) 523 continue; 524 525 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 526 } 527 528 /* 529 * The queue to share is chosen only from DATA queues as follows (in 530 * descending priority): 531 * 1. An AC_BE queue 532 * 2. Same AC queue 533 * 3. Highest AC queue that is lower than new AC 534 * 4. Any existing AC (there always is at least 1 DATA queue) 535 */ 536 537 /* Priority 1: An AC_BE queue */ 538 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 539 queue = ac_to_queue[IEEE80211_AC_BE]; 540 /* Priority 2: Same AC queue */ 541 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 542 queue = ac_to_queue[ac]; 543 /* Priority 3a: If new AC is VO and VI exists - use VI */ 544 else if (ac == IEEE80211_AC_VO && 545 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 546 queue = ac_to_queue[IEEE80211_AC_VI]; 547 /* Priority 3b: No BE so only AC less than the new one is BK */ 548 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 549 queue = ac_to_queue[IEEE80211_AC_BK]; 550 /* Priority 4a: No BE nor BK - use VI if exists */ 551 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 552 queue = ac_to_queue[IEEE80211_AC_VI]; 553 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 554 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 555 queue = ac_to_queue[IEEE80211_AC_VO]; 556 557 /* Make sure queue found (or not) is legal */ 558 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 559 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 560 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 561 IWL_ERR(mvm, "No DATA queues available to share\n"); 562 return -ENOSPC; 563 } 564 565 /* Make sure the queue isn't in the middle of being reconfigured */ 566 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 567 IWL_ERR(mvm, 568 "TXQ %d is in the middle of re-config - try again\n", 569 queue); 570 return -EBUSY; 571 } 572 573 return queue; 574 } 575 576 /* 577 * If a given queue has a higher AC than the TID stream that is being compared 578 * to, the queue needs to be redirected to the lower AC. This function does that 579 * in such a case, otherwise - if no redirection required - it does nothing, 580 * unless the %force param is true. 581 */ 582 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 583 int ac, int ssn, unsigned int wdg_timeout, 584 bool force) 585 { 586 struct iwl_scd_txq_cfg_cmd cmd = { 587 .scd_queue = queue, 588 .action = SCD_CFG_DISABLE_QUEUE, 589 }; 590 bool shared_queue; 591 unsigned long mq; 592 int ret; 593 594 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 595 return -EINVAL; 596 597 /* 598 * If the AC is lower than current one - FIFO needs to be redirected to 599 * the lowest one of the streams in the queue. Check if this is needed 600 * here. 601 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 602 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 603 * we need to check if the numerical value of X is LARGER than of Y. 604 */ 605 spin_lock_bh(&mvm->queue_info_lock); 606 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 607 spin_unlock_bh(&mvm->queue_info_lock); 608 609 IWL_DEBUG_TX_QUEUES(mvm, 610 "No redirection needed on TXQ #%d\n", 611 queue); 612 return 0; 613 } 614 615 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 616 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 617 cmd.tid = mvm->queue_info[queue].txq_tid; 618 mq = mvm->hw_queue_to_mac80211[queue]; 619 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 620 spin_unlock_bh(&mvm->queue_info_lock); 621 622 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 623 queue, iwl_mvm_ac_to_tx_fifo[ac]); 624 625 /* Stop MAC queues and wait for this queue to empty */ 626 iwl_mvm_stop_mac_queues(mvm, mq); 627 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 628 if (ret) { 629 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 630 queue); 631 ret = -EIO; 632 goto out; 633 } 634 635 /* Before redirecting the queue we need to de-activate it */ 636 iwl_trans_txq_disable(mvm->trans, queue, false); 637 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 638 if (ret) 639 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 640 ret); 641 642 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 643 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 644 645 /* Update the TID "owner" of the queue */ 646 spin_lock_bh(&mvm->queue_info_lock); 647 mvm->queue_info[queue].txq_tid = tid; 648 spin_unlock_bh(&mvm->queue_info_lock); 649 650 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 651 652 /* Redirect to lower AC */ 653 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 654 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 655 656 /* Update AC marking of the queue */ 657 spin_lock_bh(&mvm->queue_info_lock); 658 mvm->queue_info[queue].mac80211_ac = ac; 659 spin_unlock_bh(&mvm->queue_info_lock); 660 661 /* 662 * Mark queue as shared in transport if shared 663 * Note this has to be done after queue enablement because enablement 664 * can also set this value, and there is no indication there to shared 665 * queues 666 */ 667 if (shared_queue) 668 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 669 670 out: 671 /* Continue using the MAC queues */ 672 iwl_mvm_start_mac_queues(mvm, mq); 673 674 return ret; 675 } 676 677 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 678 struct ieee80211_sta *sta, u8 ac, 679 int tid) 680 { 681 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 682 unsigned int wdg_timeout = 683 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 684 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 685 int queue = -1; 686 687 lockdep_assert_held(&mvm->mutex); 688 689 IWL_DEBUG_TX_QUEUES(mvm, 690 "Allocating queue for sta %d on tid %d\n", 691 mvmsta->sta_id, tid); 692 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid, 693 wdg_timeout); 694 if (queue < 0) 695 return queue; 696 697 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 698 699 spin_lock_bh(&mvmsta->lock); 700 mvmsta->tid_data[tid].txq_id = queue; 701 mvmsta->tid_data[tid].is_tid_active = true; 702 spin_unlock_bh(&mvmsta->lock); 703 704 return 0; 705 } 706 707 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 708 struct ieee80211_sta *sta, u8 ac, int tid, 709 struct ieee80211_hdr *hdr) 710 { 711 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 712 struct iwl_trans_txq_scd_cfg cfg = { 713 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 714 .sta_id = mvmsta->sta_id, 715 .tid = tid, 716 .frame_limit = IWL_FRAME_LIMIT, 717 }; 718 unsigned int wdg_timeout = 719 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 720 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 721 int queue = -1; 722 bool using_inactive_queue = false, same_sta = false; 723 unsigned long disable_agg_tids = 0; 724 enum iwl_mvm_agg_state queue_state; 725 bool shared_queue = false, inc_ssn; 726 int ssn; 727 unsigned long tfd_queue_mask; 728 int ret; 729 730 lockdep_assert_held(&mvm->mutex); 731 732 if (iwl_mvm_has_new_tx_api(mvm)) 733 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 734 735 spin_lock_bh(&mvmsta->lock); 736 tfd_queue_mask = mvmsta->tfd_queue_msk; 737 spin_unlock_bh(&mvmsta->lock); 738 739 spin_lock_bh(&mvm->queue_info_lock); 740 741 /* 742 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 743 * exists 744 */ 745 if (!ieee80211_is_data_qos(hdr->frame_control) || 746 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 747 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 748 IWL_MVM_DQA_MIN_MGMT_QUEUE, 749 IWL_MVM_DQA_MAX_MGMT_QUEUE); 750 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 751 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 752 queue); 753 754 /* If no such queue is found, we'll use a DATA queue instead */ 755 } 756 757 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 758 (mvm->queue_info[mvmsta->reserved_queue].status == 759 IWL_MVM_QUEUE_RESERVED || 760 mvm->queue_info[mvmsta->reserved_queue].status == 761 IWL_MVM_QUEUE_INACTIVE)) { 762 queue = mvmsta->reserved_queue; 763 mvm->queue_info[queue].reserved = true; 764 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 765 } 766 767 if (queue < 0) 768 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 769 IWL_MVM_DQA_MIN_DATA_QUEUE, 770 IWL_MVM_DQA_MAX_DATA_QUEUE); 771 772 /* 773 * Check if this queue is already allocated but inactive. 774 * In such a case, we'll need to first free this queue before enabling 775 * it again, so we'll mark it as reserved to make sure no new traffic 776 * arrives on it 777 */ 778 if (queue > 0 && 779 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 780 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 781 using_inactive_queue = true; 782 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 783 IWL_DEBUG_TX_QUEUES(mvm, 784 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 785 queue, mvmsta->sta_id, tid); 786 } 787 788 /* No free queue - we'll have to share */ 789 if (queue <= 0) { 790 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 791 if (queue > 0) { 792 shared_queue = true; 793 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 794 } 795 } 796 797 /* 798 * Mark TXQ as ready, even though it hasn't been fully configured yet, 799 * to make sure no one else takes it. 800 * This will allow avoiding re-acquiring the lock at the end of the 801 * configuration. On error we'll mark it back as free. 802 */ 803 if ((queue > 0) && !shared_queue) 804 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 805 806 spin_unlock_bh(&mvm->queue_info_lock); 807 808 /* This shouldn't happen - out of queues */ 809 if (WARN_ON(queue <= 0)) { 810 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 811 tid, cfg.sta_id); 812 return queue; 813 } 814 815 /* 816 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 817 * but for configuring the SCD to send A-MPDUs we need to mark the queue 818 * as aggregatable. 819 * Mark all DATA queues as allowing to be aggregated at some point 820 */ 821 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 822 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 823 824 /* 825 * If this queue was previously inactive (idle) - we need to free it 826 * first 827 */ 828 if (using_inactive_queue) { 829 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 830 if (ret) 831 return ret; 832 } 833 834 IWL_DEBUG_TX_QUEUES(mvm, 835 "Allocating %squeue #%d to sta %d on tid %d\n", 836 shared_queue ? "shared " : "", queue, 837 mvmsta->sta_id, tid); 838 839 if (shared_queue) { 840 /* Disable any open aggs on this queue */ 841 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 842 843 if (disable_agg_tids) { 844 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 845 queue); 846 iwl_mvm_invalidate_sta_queue(mvm, queue, 847 disable_agg_tids, false); 848 } 849 } 850 851 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 852 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue, 853 ssn, &cfg, wdg_timeout); 854 if (inc_ssn) { 855 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 856 le16_add_cpu(&hdr->seq_ctrl, 0x10); 857 } 858 859 /* 860 * Mark queue as shared in transport if shared 861 * Note this has to be done after queue enablement because enablement 862 * can also set this value, and there is no indication there to shared 863 * queues 864 */ 865 if (shared_queue) 866 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 867 868 spin_lock_bh(&mvmsta->lock); 869 /* 870 * This looks racy, but it is not. We have only one packet for 871 * this ra/tid in our Tx path since we stop the Qdisc when we 872 * need to allocate a new TFD queue. 873 */ 874 if (inc_ssn) 875 mvmsta->tid_data[tid].seq_number += 0x10; 876 mvmsta->tid_data[tid].txq_id = queue; 877 mvmsta->tid_data[tid].is_tid_active = true; 878 mvmsta->tfd_queue_msk |= BIT(queue); 879 queue_state = mvmsta->tid_data[tid].state; 880 881 if (mvmsta->reserved_queue == queue) 882 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 883 spin_unlock_bh(&mvmsta->lock); 884 885 if (!shared_queue) { 886 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 887 if (ret) 888 goto out_err; 889 890 /* If we need to re-enable aggregations... */ 891 if (queue_state == IWL_AGG_ON) { 892 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 893 if (ret) 894 goto out_err; 895 } 896 } else { 897 /* Redirect queue, if needed */ 898 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 899 wdg_timeout, false); 900 if (ret) 901 goto out_err; 902 } 903 904 return 0; 905 906 out_err: 907 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 908 909 return ret; 910 } 911 912 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 913 { 914 struct iwl_scd_txq_cfg_cmd cmd = { 915 .scd_queue = queue, 916 .action = SCD_CFG_UPDATE_QUEUE_TID, 917 }; 918 int tid; 919 unsigned long tid_bitmap; 920 int ret; 921 922 lockdep_assert_held(&mvm->mutex); 923 924 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 925 return; 926 927 spin_lock_bh(&mvm->queue_info_lock); 928 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 929 spin_unlock_bh(&mvm->queue_info_lock); 930 931 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 932 return; 933 934 /* Find any TID for queue */ 935 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 936 cmd.tid = tid; 937 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 938 939 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 940 if (ret) { 941 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 942 queue, ret); 943 return; 944 } 945 946 spin_lock_bh(&mvm->queue_info_lock); 947 mvm->queue_info[queue].txq_tid = tid; 948 spin_unlock_bh(&mvm->queue_info_lock); 949 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 950 queue, tid); 951 } 952 953 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 954 { 955 struct ieee80211_sta *sta; 956 struct iwl_mvm_sta *mvmsta; 957 u8 sta_id; 958 int tid = -1; 959 unsigned long tid_bitmap; 960 unsigned int wdg_timeout; 961 int ssn; 962 int ret = true; 963 964 /* queue sharing is disabled on new TX path */ 965 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 966 return; 967 968 lockdep_assert_held(&mvm->mutex); 969 970 spin_lock_bh(&mvm->queue_info_lock); 971 sta_id = mvm->queue_info[queue].ra_sta_id; 972 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 973 spin_unlock_bh(&mvm->queue_info_lock); 974 975 /* Find TID for queue, and make sure it is the only one on the queue */ 976 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 977 if (tid_bitmap != BIT(tid)) { 978 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 979 queue, tid_bitmap); 980 return; 981 } 982 983 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 984 tid); 985 986 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 987 lockdep_is_held(&mvm->mutex)); 988 989 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 990 return; 991 992 mvmsta = iwl_mvm_sta_from_mac80211(sta); 993 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 994 995 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 996 997 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 998 tid_to_mac80211_ac[tid], ssn, 999 wdg_timeout, true); 1000 if (ret) { 1001 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 1002 return; 1003 } 1004 1005 /* If aggs should be turned back on - do it */ 1006 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1007 struct iwl_mvm_add_sta_cmd cmd = {0}; 1008 1009 mvmsta->tid_disable_agg &= ~BIT(tid); 1010 1011 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1012 cmd.sta_id = mvmsta->sta_id; 1013 cmd.add_modify = STA_MODE_MODIFY; 1014 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1015 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1016 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1017 1018 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1019 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1020 if (!ret) { 1021 IWL_DEBUG_TX_QUEUES(mvm, 1022 "TXQ #%d is now aggregated again\n", 1023 queue); 1024 1025 /* Mark queue intenally as aggregating again */ 1026 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1027 } 1028 } 1029 1030 spin_lock_bh(&mvm->queue_info_lock); 1031 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1032 spin_unlock_bh(&mvm->queue_info_lock); 1033 } 1034 1035 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1036 { 1037 if (tid == IWL_MAX_TID_COUNT) 1038 return IEEE80211_AC_VO; /* MGMT */ 1039 1040 return tid_to_mac80211_ac[tid]; 1041 } 1042 1043 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 1044 struct ieee80211_sta *sta, int tid) 1045 { 1046 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1047 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1048 struct sk_buff *skb; 1049 struct ieee80211_hdr *hdr; 1050 struct sk_buff_head deferred_tx; 1051 u8 mac_queue; 1052 bool no_queue = false; /* Marks if there is a problem with the queue */ 1053 u8 ac; 1054 1055 lockdep_assert_held(&mvm->mutex); 1056 1057 skb = skb_peek(&tid_data->deferred_tx_frames); 1058 if (!skb) 1059 return; 1060 hdr = (void *)skb->data; 1061 1062 ac = iwl_mvm_tid_to_ac_queue(tid); 1063 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1064 1065 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE && 1066 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1067 IWL_ERR(mvm, 1068 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1069 mvmsta->sta_id, tid); 1070 1071 /* 1072 * Mark queue as problematic so later the deferred traffic is 1073 * freed, as we can do nothing with it 1074 */ 1075 no_queue = true; 1076 } 1077 1078 __skb_queue_head_init(&deferred_tx); 1079 1080 /* Disable bottom-halves when entering TX path */ 1081 local_bh_disable(); 1082 spin_lock(&mvmsta->lock); 1083 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1084 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1085 spin_unlock(&mvmsta->lock); 1086 1087 while ((skb = __skb_dequeue(&deferred_tx))) 1088 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1089 ieee80211_free_txskb(mvm->hw, skb); 1090 local_bh_enable(); 1091 1092 /* Wake queue */ 1093 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1094 } 1095 1096 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1097 { 1098 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1099 add_stream_wk); 1100 struct ieee80211_sta *sta; 1101 struct iwl_mvm_sta *mvmsta; 1102 unsigned long deferred_tid_traffic; 1103 int queue, sta_id, tid; 1104 1105 /* Check inactivity of queues */ 1106 iwl_mvm_inactivity_check(mvm); 1107 1108 mutex_lock(&mvm->mutex); 1109 1110 /* No queue reconfiguration in TVQM mode */ 1111 if (iwl_mvm_has_new_tx_api(mvm)) 1112 goto alloc_queues; 1113 1114 /* Reconfigure queues requiring reconfiguation */ 1115 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) { 1116 bool reconfig; 1117 bool change_owner; 1118 1119 spin_lock_bh(&mvm->queue_info_lock); 1120 reconfig = (mvm->queue_info[queue].status == 1121 IWL_MVM_QUEUE_RECONFIGURING); 1122 1123 /* 1124 * We need to take into account a situation in which a TXQ was 1125 * allocated to TID x, and then turned shared by adding TIDs y 1126 * and z. If TID x becomes inactive and is removed from the TXQ, 1127 * ownership must be given to one of the remaining TIDs. 1128 * This is mainly because if TID x continues - a new queue can't 1129 * be allocated for it as long as it is an owner of another TXQ. 1130 */ 1131 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1132 BIT(mvm->queue_info[queue].txq_tid)) && 1133 (mvm->queue_info[queue].status == 1134 IWL_MVM_QUEUE_SHARED); 1135 spin_unlock_bh(&mvm->queue_info_lock); 1136 1137 if (reconfig) 1138 iwl_mvm_unshare_queue(mvm, queue); 1139 else if (change_owner) 1140 iwl_mvm_change_queue_owner(mvm, queue); 1141 } 1142 1143 alloc_queues: 1144 /* Go over all stations with deferred traffic */ 1145 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1146 IWL_MVM_STATION_COUNT) { 1147 clear_bit(sta_id, mvm->sta_deferred_frames); 1148 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1149 lockdep_is_held(&mvm->mutex)); 1150 if (IS_ERR_OR_NULL(sta)) 1151 continue; 1152 1153 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1154 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1155 1156 for_each_set_bit(tid, &deferred_tid_traffic, 1157 IWL_MAX_TID_COUNT + 1) 1158 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1159 } 1160 1161 mutex_unlock(&mvm->mutex); 1162 } 1163 1164 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1165 struct ieee80211_sta *sta, 1166 enum nl80211_iftype vif_type) 1167 { 1168 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1169 int queue; 1170 bool using_inactive_queue = false, same_sta = false; 1171 1172 /* queue reserving is disabled on new TX path */ 1173 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1174 return 0; 1175 1176 /* 1177 * Check for inactive queues, so we don't reach a situation where we 1178 * can't add a STA due to a shortage in queues that doesn't really exist 1179 */ 1180 iwl_mvm_inactivity_check(mvm); 1181 1182 spin_lock_bh(&mvm->queue_info_lock); 1183 1184 /* Make sure we have free resources for this STA */ 1185 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1186 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1187 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1188 IWL_MVM_QUEUE_FREE)) 1189 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1190 else 1191 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1192 IWL_MVM_DQA_MIN_DATA_QUEUE, 1193 IWL_MVM_DQA_MAX_DATA_QUEUE); 1194 if (queue < 0) { 1195 spin_unlock_bh(&mvm->queue_info_lock); 1196 IWL_ERR(mvm, "No available queues for new station\n"); 1197 return -ENOSPC; 1198 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 1199 /* 1200 * If this queue is already allocated but inactive we'll need to 1201 * first free this queue before enabling it again, we'll mark 1202 * it as reserved to make sure no new traffic arrives on it 1203 */ 1204 using_inactive_queue = true; 1205 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 1206 } 1207 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1208 1209 spin_unlock_bh(&mvm->queue_info_lock); 1210 1211 mvmsta->reserved_queue = queue; 1212 1213 if (using_inactive_queue) 1214 iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 1215 1216 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1217 queue, mvmsta->sta_id); 1218 1219 return 0; 1220 } 1221 1222 /* 1223 * In DQA mode, after a HW restart the queues should be allocated as before, in 1224 * order to avoid race conditions when there are shared queues. This function 1225 * does the re-mapping and queue allocation. 1226 * 1227 * Note that re-enabling aggregations isn't done in this function. 1228 */ 1229 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1230 struct iwl_mvm_sta *mvm_sta) 1231 { 1232 unsigned int wdg_timeout = 1233 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1234 int i; 1235 struct iwl_trans_txq_scd_cfg cfg = { 1236 .sta_id = mvm_sta->sta_id, 1237 .frame_limit = IWL_FRAME_LIMIT, 1238 }; 1239 1240 /* Make sure reserved queue is still marked as such (if allocated) */ 1241 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1242 mvm->queue_info[mvm_sta->reserved_queue].status = 1243 IWL_MVM_QUEUE_RESERVED; 1244 1245 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1246 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1247 int txq_id = tid_data->txq_id; 1248 int ac; 1249 u8 mac_queue; 1250 1251 if (txq_id == IWL_MVM_INVALID_QUEUE) 1252 continue; 1253 1254 skb_queue_head_init(&tid_data->deferred_tx_frames); 1255 1256 ac = tid_to_mac80211_ac[i]; 1257 mac_queue = mvm_sta->vif->hw_queue[ac]; 1258 1259 if (iwl_mvm_has_new_tx_api(mvm)) { 1260 IWL_DEBUG_TX_QUEUES(mvm, 1261 "Re-mapping sta %d tid %d\n", 1262 mvm_sta->sta_id, i); 1263 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, 1264 mvm_sta->sta_id, 1265 i, wdg_timeout); 1266 tid_data->txq_id = txq_id; 1267 1268 /* 1269 * Since we don't set the seq number after reset, and HW 1270 * sets it now, FW reset will cause the seq num to start 1271 * at 0 again, so driver will need to update it 1272 * internally as well, so it keeps in sync with real val 1273 */ 1274 tid_data->seq_number = 0; 1275 } else { 1276 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1277 1278 cfg.tid = i; 1279 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1280 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1281 txq_id == 1282 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1283 1284 IWL_DEBUG_TX_QUEUES(mvm, 1285 "Re-mapping sta %d tid %d to queue %d\n", 1286 mvm_sta->sta_id, i, txq_id); 1287 1288 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg, 1289 wdg_timeout); 1290 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1291 } 1292 } 1293 } 1294 1295 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1296 struct iwl_mvm_int_sta *sta, 1297 const u8 *addr, 1298 u16 mac_id, u16 color) 1299 { 1300 struct iwl_mvm_add_sta_cmd cmd; 1301 int ret; 1302 u32 status = ADD_STA_SUCCESS; 1303 1304 lockdep_assert_held(&mvm->mutex); 1305 1306 memset(&cmd, 0, sizeof(cmd)); 1307 cmd.sta_id = sta->sta_id; 1308 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1309 color)); 1310 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1311 cmd.station_type = sta->type; 1312 1313 if (!iwl_mvm_has_new_tx_api(mvm)) 1314 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1315 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1316 1317 if (addr) 1318 memcpy(cmd.addr, addr, ETH_ALEN); 1319 1320 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1321 iwl_mvm_add_sta_cmd_size(mvm), 1322 &cmd, &status); 1323 if (ret) 1324 return ret; 1325 1326 switch (status & IWL_ADD_STA_STATUS_MASK) { 1327 case ADD_STA_SUCCESS: 1328 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1329 return 0; 1330 default: 1331 ret = -EIO; 1332 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1333 status); 1334 break; 1335 } 1336 return ret; 1337 } 1338 1339 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1340 struct ieee80211_vif *vif, 1341 struct ieee80211_sta *sta) 1342 { 1343 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1344 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1345 struct iwl_mvm_rxq_dup_data *dup_data; 1346 int i, ret, sta_id; 1347 bool sta_update = false; 1348 unsigned int sta_flags = 0; 1349 1350 lockdep_assert_held(&mvm->mutex); 1351 1352 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1353 sta_id = iwl_mvm_find_free_sta_id(mvm, 1354 ieee80211_vif_type_p2p(vif)); 1355 else 1356 sta_id = mvm_sta->sta_id; 1357 1358 if (sta_id == IWL_MVM_INVALID_STA) 1359 return -ENOSPC; 1360 1361 spin_lock_init(&mvm_sta->lock); 1362 1363 /* if this is a HW restart re-alloc existing queues */ 1364 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1365 struct iwl_mvm_int_sta tmp_sta = { 1366 .sta_id = sta_id, 1367 .type = mvm_sta->sta_type, 1368 }; 1369 1370 /* 1371 * First add an empty station since allocating 1372 * a queue requires a valid station 1373 */ 1374 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1375 mvmvif->id, mvmvif->color); 1376 if (ret) 1377 goto err; 1378 1379 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1380 sta_update = true; 1381 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1382 goto update_fw; 1383 } 1384 1385 mvm_sta->sta_id = sta_id; 1386 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1387 mvmvif->color); 1388 mvm_sta->vif = vif; 1389 if (!mvm->trans->cfg->gen2) 1390 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1391 else 1392 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1393 mvm_sta->tx_protection = 0; 1394 mvm_sta->tt_tx_protection = false; 1395 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1396 1397 /* HW restart, don't assume the memory has been zeroed */ 1398 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1399 mvm_sta->tfd_queue_msk = 0; 1400 1401 /* for HW restart - reset everything but the sequence number */ 1402 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1403 u16 seq = mvm_sta->tid_data[i].seq_number; 1404 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1405 mvm_sta->tid_data[i].seq_number = seq; 1406 1407 /* 1408 * Mark all queues for this STA as unallocated and defer TX 1409 * frames until the queue is allocated 1410 */ 1411 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1412 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1413 } 1414 mvm_sta->deferred_traffic_tid_map = 0; 1415 mvm_sta->agg_tids = 0; 1416 1417 if (iwl_mvm_has_new_rx_api(mvm) && 1418 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1419 int q; 1420 1421 dup_data = kcalloc(mvm->trans->num_rx_queues, 1422 sizeof(*dup_data), GFP_KERNEL); 1423 if (!dup_data) 1424 return -ENOMEM; 1425 /* 1426 * Initialize all the last_seq values to 0xffff which can never 1427 * compare equal to the frame's seq_ctrl in the check in 1428 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1429 * number and fragmented packets don't reach that function. 1430 * 1431 * This thus allows receiving a packet with seqno 0 and the 1432 * retry bit set as the very first packet on a new TID. 1433 */ 1434 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1435 memset(dup_data[q].last_seq, 0xff, 1436 sizeof(dup_data[q].last_seq)); 1437 mvm_sta->dup_data = dup_data; 1438 } 1439 1440 if (!iwl_mvm_has_new_tx_api(mvm)) { 1441 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1442 ieee80211_vif_type_p2p(vif)); 1443 if (ret) 1444 goto err; 1445 } 1446 1447 /* 1448 * if rs is registered with mac80211, then "add station" will be handled 1449 * via the corresponding ops, otherwise need to notify rate scaling here 1450 */ 1451 if (iwl_mvm_has_tlc_offload(mvm)) 1452 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1453 1454 update_fw: 1455 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1456 if (ret) 1457 goto err; 1458 1459 if (vif->type == NL80211_IFTYPE_STATION) { 1460 if (!sta->tdls) { 1461 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1462 mvmvif->ap_sta_id = sta_id; 1463 } else { 1464 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1465 } 1466 } 1467 1468 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1469 1470 return 0; 1471 1472 err: 1473 return ret; 1474 } 1475 1476 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1477 bool drain) 1478 { 1479 struct iwl_mvm_add_sta_cmd cmd = {}; 1480 int ret; 1481 u32 status; 1482 1483 lockdep_assert_held(&mvm->mutex); 1484 1485 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1486 cmd.sta_id = mvmsta->sta_id; 1487 cmd.add_modify = STA_MODE_MODIFY; 1488 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1489 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1490 1491 status = ADD_STA_SUCCESS; 1492 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1493 iwl_mvm_add_sta_cmd_size(mvm), 1494 &cmd, &status); 1495 if (ret) 1496 return ret; 1497 1498 switch (status & IWL_ADD_STA_STATUS_MASK) { 1499 case ADD_STA_SUCCESS: 1500 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1501 mvmsta->sta_id); 1502 break; 1503 default: 1504 ret = -EIO; 1505 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1506 mvmsta->sta_id); 1507 break; 1508 } 1509 1510 return ret; 1511 } 1512 1513 /* 1514 * Remove a station from the FW table. Before sending the command to remove 1515 * the station validate that the station is indeed known to the driver (sanity 1516 * only). 1517 */ 1518 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1519 { 1520 struct ieee80211_sta *sta; 1521 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1522 .sta_id = sta_id, 1523 }; 1524 int ret; 1525 1526 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1527 lockdep_is_held(&mvm->mutex)); 1528 1529 /* Note: internal stations are marked as error values */ 1530 if (!sta) { 1531 IWL_ERR(mvm, "Invalid station id\n"); 1532 return -EINVAL; 1533 } 1534 1535 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1536 sizeof(rm_sta_cmd), &rm_sta_cmd); 1537 if (ret) { 1538 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1539 return ret; 1540 } 1541 1542 return 0; 1543 } 1544 1545 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1546 struct ieee80211_vif *vif, 1547 struct iwl_mvm_sta *mvm_sta) 1548 { 1549 int ac; 1550 int i; 1551 1552 lockdep_assert_held(&mvm->mutex); 1553 1554 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1555 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1556 continue; 1557 1558 ac = iwl_mvm_tid_to_ac_queue(i); 1559 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1560 vif->hw_queue[ac], i, 0); 1561 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1562 } 1563 } 1564 1565 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1566 struct iwl_mvm_sta *mvm_sta) 1567 { 1568 int i; 1569 1570 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1571 u16 txq_id; 1572 int ret; 1573 1574 spin_lock_bh(&mvm_sta->lock); 1575 txq_id = mvm_sta->tid_data[i].txq_id; 1576 spin_unlock_bh(&mvm_sta->lock); 1577 1578 if (txq_id == IWL_MVM_INVALID_QUEUE) 1579 continue; 1580 1581 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1582 if (ret) 1583 return ret; 1584 } 1585 1586 return 0; 1587 } 1588 1589 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1590 struct ieee80211_vif *vif, 1591 struct ieee80211_sta *sta) 1592 { 1593 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1594 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1595 u8 sta_id = mvm_sta->sta_id; 1596 int ret; 1597 1598 lockdep_assert_held(&mvm->mutex); 1599 1600 if (iwl_mvm_has_new_rx_api(mvm)) 1601 kfree(mvm_sta->dup_data); 1602 1603 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1604 if (ret) 1605 return ret; 1606 1607 /* flush its queues here since we are freeing mvm_sta */ 1608 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1609 if (ret) 1610 return ret; 1611 if (iwl_mvm_has_new_tx_api(mvm)) { 1612 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1613 } else { 1614 u32 q_mask = mvm_sta->tfd_queue_msk; 1615 1616 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1617 q_mask); 1618 } 1619 if (ret) 1620 return ret; 1621 1622 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1623 1624 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1625 1626 /* If there is a TXQ still marked as reserved - free it */ 1627 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1628 u8 reserved_txq = mvm_sta->reserved_queue; 1629 enum iwl_mvm_queue_status *status; 1630 1631 /* 1632 * If no traffic has gone through the reserved TXQ - it 1633 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1634 * should be manually marked as free again 1635 */ 1636 spin_lock_bh(&mvm->queue_info_lock); 1637 status = &mvm->queue_info[reserved_txq].status; 1638 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1639 (*status != IWL_MVM_QUEUE_FREE), 1640 "sta_id %d reserved txq %d status %d", 1641 sta_id, reserved_txq, *status)) { 1642 spin_unlock_bh(&mvm->queue_info_lock); 1643 return -EINVAL; 1644 } 1645 1646 *status = IWL_MVM_QUEUE_FREE; 1647 spin_unlock_bh(&mvm->queue_info_lock); 1648 } 1649 1650 if (vif->type == NL80211_IFTYPE_STATION && 1651 mvmvif->ap_sta_id == sta_id) { 1652 /* if associated - we can't remove the AP STA now */ 1653 if (vif->bss_conf.assoc) 1654 return ret; 1655 1656 /* unassoc - go ahead - remove the AP STA now */ 1657 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1658 1659 /* clear d0i3_ap_sta_id if no longer relevant */ 1660 if (mvm->d0i3_ap_sta_id == sta_id) 1661 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1662 } 1663 1664 /* 1665 * This shouldn't happen - the TDLS channel switch should be canceled 1666 * before the STA is removed. 1667 */ 1668 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1669 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1670 cancel_delayed_work(&mvm->tdls_cs.dwork); 1671 } 1672 1673 /* 1674 * Make sure that the tx response code sees the station as -EBUSY and 1675 * calls the drain worker. 1676 */ 1677 spin_lock_bh(&mvm_sta->lock); 1678 spin_unlock_bh(&mvm_sta->lock); 1679 1680 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1681 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1682 1683 return ret; 1684 } 1685 1686 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1687 struct ieee80211_vif *vif, 1688 u8 sta_id) 1689 { 1690 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1691 1692 lockdep_assert_held(&mvm->mutex); 1693 1694 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1695 return ret; 1696 } 1697 1698 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1699 struct iwl_mvm_int_sta *sta, 1700 u32 qmask, enum nl80211_iftype iftype, 1701 enum iwl_sta_type type) 1702 { 1703 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1704 sta->sta_id == IWL_MVM_INVALID_STA) { 1705 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1706 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1707 return -ENOSPC; 1708 } 1709 1710 sta->tfd_queue_msk = qmask; 1711 sta->type = type; 1712 1713 /* put a non-NULL value so iterating over the stations won't stop */ 1714 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1715 return 0; 1716 } 1717 1718 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1719 { 1720 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1721 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1722 sta->sta_id = IWL_MVM_INVALID_STA; 1723 } 1724 1725 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1726 u8 sta_id, u8 fifo) 1727 { 1728 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1729 mvm->cfg->base_params->wd_timeout : 1730 IWL_WATCHDOG_DISABLED; 1731 1732 if (iwl_mvm_has_new_tx_api(mvm)) { 1733 int tvqm_queue = 1734 iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id, 1735 IWL_MAX_TID_COUNT, 1736 wdg_timeout); 1737 *queue = tvqm_queue; 1738 } else { 1739 struct iwl_trans_txq_scd_cfg cfg = { 1740 .fifo = fifo, 1741 .sta_id = sta_id, 1742 .tid = IWL_MAX_TID_COUNT, 1743 .aggregate = false, 1744 .frame_limit = IWL_FRAME_LIMIT, 1745 }; 1746 1747 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout); 1748 } 1749 } 1750 1751 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1752 { 1753 int ret; 1754 1755 lockdep_assert_held(&mvm->mutex); 1756 1757 /* Allocate aux station and assign to it the aux queue */ 1758 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1759 NL80211_IFTYPE_UNSPECIFIED, 1760 IWL_STA_AUX_ACTIVITY); 1761 if (ret) 1762 return ret; 1763 1764 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1765 if (!iwl_mvm_has_new_tx_api(mvm)) 1766 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1767 mvm->aux_sta.sta_id, 1768 IWL_MVM_TX_FIFO_MCAST); 1769 1770 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1771 MAC_INDEX_AUX, 0); 1772 if (ret) { 1773 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1774 return ret; 1775 } 1776 1777 /* 1778 * For 22000 firmware and on we cannot add queue to a station unknown 1779 * to firmware so enable queue here - after the station was added 1780 */ 1781 if (iwl_mvm_has_new_tx_api(mvm)) 1782 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1783 mvm->aux_sta.sta_id, 1784 IWL_MVM_TX_FIFO_MCAST); 1785 1786 return 0; 1787 } 1788 1789 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1790 { 1791 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1792 int ret; 1793 1794 lockdep_assert_held(&mvm->mutex); 1795 1796 /* Map snif queue to fifo - must happen before adding snif station */ 1797 if (!iwl_mvm_has_new_tx_api(mvm)) 1798 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 1799 mvm->snif_sta.sta_id, 1800 IWL_MVM_TX_FIFO_BE); 1801 1802 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1803 mvmvif->id, 0); 1804 if (ret) 1805 return ret; 1806 1807 /* 1808 * For 22000 firmware and on we cannot add queue to a station unknown 1809 * to firmware so enable queue here - after the station was added 1810 */ 1811 if (iwl_mvm_has_new_tx_api(mvm)) 1812 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 1813 mvm->snif_sta.sta_id, 1814 IWL_MVM_TX_FIFO_BE); 1815 1816 return 0; 1817 } 1818 1819 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1820 { 1821 int ret; 1822 1823 lockdep_assert_held(&mvm->mutex); 1824 1825 iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue, 1826 IWL_MAX_TID_COUNT, 0); 1827 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1828 if (ret) 1829 IWL_WARN(mvm, "Failed sending remove station\n"); 1830 1831 return ret; 1832 } 1833 1834 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1835 { 1836 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1837 } 1838 1839 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1840 { 1841 lockdep_assert_held(&mvm->mutex); 1842 1843 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1844 } 1845 1846 /* 1847 * Send the add station command for the vif's broadcast station. 1848 * Assumes that the station was already allocated. 1849 * 1850 * @mvm: the mvm component 1851 * @vif: the interface to which the broadcast station is added 1852 * @bsta: the broadcast station to add. 1853 */ 1854 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1855 { 1856 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1857 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1858 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1859 const u8 *baddr = _baddr; 1860 int queue; 1861 int ret; 1862 unsigned int wdg_timeout = 1863 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1864 struct iwl_trans_txq_scd_cfg cfg = { 1865 .fifo = IWL_MVM_TX_FIFO_VO, 1866 .sta_id = mvmvif->bcast_sta.sta_id, 1867 .tid = IWL_MAX_TID_COUNT, 1868 .aggregate = false, 1869 .frame_limit = IWL_FRAME_LIMIT, 1870 }; 1871 1872 lockdep_assert_held(&mvm->mutex); 1873 1874 if (!iwl_mvm_has_new_tx_api(mvm)) { 1875 if (vif->type == NL80211_IFTYPE_AP || 1876 vif->type == NL80211_IFTYPE_ADHOC) 1877 queue = mvm->probe_queue; 1878 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1879 queue = mvm->p2p_dev_queue; 1880 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 1881 return -EINVAL; 1882 1883 bsta->tfd_queue_msk |= BIT(queue); 1884 1885 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, 1886 &cfg, wdg_timeout); 1887 } 1888 1889 if (vif->type == NL80211_IFTYPE_ADHOC) 1890 baddr = vif->bss_conf.bssid; 1891 1892 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 1893 return -ENOSPC; 1894 1895 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1896 mvmvif->id, mvmvif->color); 1897 if (ret) 1898 return ret; 1899 1900 /* 1901 * For 22000 firmware and on we cannot add queue to a station unknown 1902 * to firmware so enable queue here - after the station was added 1903 */ 1904 if (iwl_mvm_has_new_tx_api(mvm)) { 1905 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0], 1906 bsta->sta_id, 1907 IWL_MAX_TID_COUNT, 1908 wdg_timeout); 1909 1910 if (vif->type == NL80211_IFTYPE_AP || 1911 vif->type == NL80211_IFTYPE_ADHOC) 1912 mvm->probe_queue = queue; 1913 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1914 mvm->p2p_dev_queue = queue; 1915 } 1916 1917 return 0; 1918 } 1919 1920 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 1921 struct ieee80211_vif *vif) 1922 { 1923 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1924 int queue; 1925 1926 lockdep_assert_held(&mvm->mutex); 1927 1928 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 1929 1930 switch (vif->type) { 1931 case NL80211_IFTYPE_AP: 1932 case NL80211_IFTYPE_ADHOC: 1933 queue = mvm->probe_queue; 1934 break; 1935 case NL80211_IFTYPE_P2P_DEVICE: 1936 queue = mvm->p2p_dev_queue; 1937 break; 1938 default: 1939 WARN(1, "Can't free bcast queue on vif type %d\n", 1940 vif->type); 1941 return; 1942 } 1943 1944 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0); 1945 if (iwl_mvm_has_new_tx_api(mvm)) 1946 return; 1947 1948 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 1949 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 1950 } 1951 1952 /* Send the FW a request to remove the station from it's internal data 1953 * structures, but DO NOT remove the entry from the local data structures. */ 1954 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1955 { 1956 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1957 int ret; 1958 1959 lockdep_assert_held(&mvm->mutex); 1960 1961 iwl_mvm_free_bcast_sta_queues(mvm, vif); 1962 1963 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1964 if (ret) 1965 IWL_WARN(mvm, "Failed sending remove station\n"); 1966 return ret; 1967 } 1968 1969 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1970 { 1971 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1972 1973 lockdep_assert_held(&mvm->mutex); 1974 1975 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 1976 ieee80211_vif_type_p2p(vif), 1977 IWL_STA_GENERAL_PURPOSE); 1978 } 1979 1980 /* Allocate a new station entry for the broadcast station to the given vif, 1981 * and send it to the FW. 1982 * Note that each P2P mac should have its own broadcast station. 1983 * 1984 * @mvm: the mvm component 1985 * @vif: the interface to which the broadcast station is added 1986 * @bsta: the broadcast station to add. */ 1987 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1988 { 1989 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1990 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1991 int ret; 1992 1993 lockdep_assert_held(&mvm->mutex); 1994 1995 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1996 if (ret) 1997 return ret; 1998 1999 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2000 2001 if (ret) 2002 iwl_mvm_dealloc_int_sta(mvm, bsta); 2003 2004 return ret; 2005 } 2006 2007 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2008 { 2009 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2010 2011 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2012 } 2013 2014 /* 2015 * Send the FW a request to remove the station from it's internal data 2016 * structures, and in addition remove it from the local data structure. 2017 */ 2018 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2019 { 2020 int ret; 2021 2022 lockdep_assert_held(&mvm->mutex); 2023 2024 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2025 2026 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2027 2028 return ret; 2029 } 2030 2031 /* 2032 * Allocate a new station entry for the multicast station to the given vif, 2033 * and send it to the FW. 2034 * Note that each AP/GO mac should have its own multicast station. 2035 * 2036 * @mvm: the mvm component 2037 * @vif: the interface to which the multicast station is added 2038 */ 2039 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2040 { 2041 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2042 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2043 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2044 const u8 *maddr = _maddr; 2045 struct iwl_trans_txq_scd_cfg cfg = { 2046 .fifo = IWL_MVM_TX_FIFO_MCAST, 2047 .sta_id = msta->sta_id, 2048 .tid = 0, 2049 .aggregate = false, 2050 .frame_limit = IWL_FRAME_LIMIT, 2051 }; 2052 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2053 int ret; 2054 2055 lockdep_assert_held(&mvm->mutex); 2056 2057 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2058 vif->type != NL80211_IFTYPE_ADHOC)) 2059 return -ENOTSUPP; 2060 2061 /* 2062 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2063 * invalid, so make sure we use the queue we want. 2064 * Note that this is done here as we want to avoid making DQA 2065 * changes in mac80211 layer. 2066 */ 2067 if (vif->type == NL80211_IFTYPE_ADHOC) { 2068 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2069 mvmvif->cab_queue = vif->cab_queue; 2070 } 2071 2072 /* 2073 * While in previous FWs we had to exclude cab queue from TFD queue 2074 * mask, now it is needed as any other queue. 2075 */ 2076 if (!iwl_mvm_has_new_tx_api(mvm) && 2077 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2078 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2079 &cfg, timeout); 2080 msta->tfd_queue_msk |= BIT(vif->cab_queue); 2081 } 2082 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2083 mvmvif->id, mvmvif->color); 2084 if (ret) { 2085 iwl_mvm_dealloc_int_sta(mvm, msta); 2086 return ret; 2087 } 2088 2089 /* 2090 * Enable cab queue after the ADD_STA command is sent. 2091 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2092 * command with unknown station id, and for FW that doesn't support 2093 * station API since the cab queue is not included in the 2094 * tfd_queue_mask. 2095 */ 2096 if (iwl_mvm_has_new_tx_api(mvm)) { 2097 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue, 2098 msta->sta_id, 2099 0, 2100 timeout); 2101 mvmvif->cab_queue = queue; 2102 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2103 IWL_UCODE_TLV_API_STA_TYPE)) 2104 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2105 &cfg, timeout); 2106 2107 if (mvmvif->ap_wep_key) { 2108 u8 key_offset = iwl_mvm_set_fw_key_idx(mvm); 2109 2110 if (key_offset == STA_KEY_IDX_INVALID) 2111 return -ENOSPC; 2112 2113 ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id, 2114 mvmvif->ap_wep_key, 1, 0, NULL, 0, 2115 key_offset, 0); 2116 if (ret) 2117 return ret; 2118 } 2119 2120 return 0; 2121 } 2122 2123 /* 2124 * Send the FW a request to remove the station from it's internal data 2125 * structures, and in addition remove it from the local data structure. 2126 */ 2127 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2128 { 2129 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2130 int ret; 2131 2132 lockdep_assert_held(&mvm->mutex); 2133 2134 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2135 2136 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue, 2137 0, 0); 2138 2139 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2140 if (ret) 2141 IWL_WARN(mvm, "Failed sending remove station\n"); 2142 2143 return ret; 2144 } 2145 2146 #define IWL_MAX_RX_BA_SESSIONS 16 2147 2148 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2149 { 2150 struct iwl_mvm_delba_notif notif = { 2151 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2152 .metadata.sync = 1, 2153 .delba.baid = baid, 2154 }; 2155 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2156 }; 2157 2158 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2159 struct iwl_mvm_baid_data *data) 2160 { 2161 int i; 2162 2163 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2164 2165 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2166 int j; 2167 struct iwl_mvm_reorder_buffer *reorder_buf = 2168 &data->reorder_buf[i]; 2169 struct iwl_mvm_reorder_buf_entry *entries = 2170 &data->entries[i * data->entries_per_queue]; 2171 2172 spin_lock_bh(&reorder_buf->lock); 2173 if (likely(!reorder_buf->num_stored)) { 2174 spin_unlock_bh(&reorder_buf->lock); 2175 continue; 2176 } 2177 2178 /* 2179 * This shouldn't happen in regular DELBA since the internal 2180 * delBA notification should trigger a release of all frames in 2181 * the reorder buffer. 2182 */ 2183 WARN_ON(1); 2184 2185 for (j = 0; j < reorder_buf->buf_size; j++) 2186 __skb_queue_purge(&entries[j].e.frames); 2187 /* 2188 * Prevent timer re-arm. This prevents a very far fetched case 2189 * where we timed out on the notification. There may be prior 2190 * RX frames pending in the RX queue before the notification 2191 * that might get processed between now and the actual deletion 2192 * and we would re-arm the timer although we are deleting the 2193 * reorder buffer. 2194 */ 2195 reorder_buf->removed = true; 2196 spin_unlock_bh(&reorder_buf->lock); 2197 del_timer_sync(&reorder_buf->reorder_timer); 2198 } 2199 } 2200 2201 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2202 struct iwl_mvm_baid_data *data, 2203 u16 ssn, u16 buf_size) 2204 { 2205 int i; 2206 2207 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2208 struct iwl_mvm_reorder_buffer *reorder_buf = 2209 &data->reorder_buf[i]; 2210 struct iwl_mvm_reorder_buf_entry *entries = 2211 &data->entries[i * data->entries_per_queue]; 2212 int j; 2213 2214 reorder_buf->num_stored = 0; 2215 reorder_buf->head_sn = ssn; 2216 reorder_buf->buf_size = buf_size; 2217 /* rx reorder timer */ 2218 timer_setup(&reorder_buf->reorder_timer, 2219 iwl_mvm_reorder_timer_expired, 0); 2220 spin_lock_init(&reorder_buf->lock); 2221 reorder_buf->mvm = mvm; 2222 reorder_buf->queue = i; 2223 reorder_buf->valid = false; 2224 for (j = 0; j < reorder_buf->buf_size; j++) 2225 __skb_queue_head_init(&entries[j].e.frames); 2226 } 2227 } 2228 2229 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2230 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2231 { 2232 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2233 struct iwl_mvm_add_sta_cmd cmd = {}; 2234 struct iwl_mvm_baid_data *baid_data = NULL; 2235 int ret; 2236 u32 status; 2237 2238 lockdep_assert_held(&mvm->mutex); 2239 2240 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2241 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2242 return -ENOSPC; 2243 } 2244 2245 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2246 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2247 2248 /* sparse doesn't like the __align() so don't check */ 2249 #ifndef __CHECKER__ 2250 /* 2251 * The division below will be OK if either the cache line size 2252 * can be divided by the entry size (ALIGN will round up) or if 2253 * if the entry size can be divided by the cache line size, in 2254 * which case the ALIGN() will do nothing. 2255 */ 2256 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2257 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2258 #endif 2259 2260 /* 2261 * Upward align the reorder buffer size to fill an entire cache 2262 * line for each queue, to avoid sharing cache lines between 2263 * different queues. 2264 */ 2265 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2266 2267 /* 2268 * Allocate here so if allocation fails we can bail out early 2269 * before starting the BA session in the firmware 2270 */ 2271 baid_data = kzalloc(sizeof(*baid_data) + 2272 mvm->trans->num_rx_queues * 2273 reorder_buf_size, 2274 GFP_KERNEL); 2275 if (!baid_data) 2276 return -ENOMEM; 2277 2278 /* 2279 * This division is why we need the above BUILD_BUG_ON(), 2280 * if that doesn't hold then this will not be right. 2281 */ 2282 baid_data->entries_per_queue = 2283 reorder_buf_size / sizeof(baid_data->entries[0]); 2284 } 2285 2286 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2287 cmd.sta_id = mvm_sta->sta_id; 2288 cmd.add_modify = STA_MODE_MODIFY; 2289 if (start) { 2290 cmd.add_immediate_ba_tid = (u8) tid; 2291 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2292 cmd.rx_ba_window = cpu_to_le16(buf_size); 2293 } else { 2294 cmd.remove_immediate_ba_tid = (u8) tid; 2295 } 2296 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2297 STA_MODIFY_REMOVE_BA_TID; 2298 2299 status = ADD_STA_SUCCESS; 2300 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2301 iwl_mvm_add_sta_cmd_size(mvm), 2302 &cmd, &status); 2303 if (ret) 2304 goto out_free; 2305 2306 switch (status & IWL_ADD_STA_STATUS_MASK) { 2307 case ADD_STA_SUCCESS: 2308 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2309 start ? "start" : "stopp"); 2310 break; 2311 case ADD_STA_IMMEDIATE_BA_FAILURE: 2312 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2313 ret = -ENOSPC; 2314 break; 2315 default: 2316 ret = -EIO; 2317 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2318 start ? "start" : "stopp", status); 2319 break; 2320 } 2321 2322 if (ret) 2323 goto out_free; 2324 2325 if (start) { 2326 u8 baid; 2327 2328 mvm->rx_ba_sessions++; 2329 2330 if (!iwl_mvm_has_new_rx_api(mvm)) 2331 return 0; 2332 2333 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2334 ret = -EINVAL; 2335 goto out_free; 2336 } 2337 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2338 IWL_ADD_STA_BAID_SHIFT); 2339 baid_data->baid = baid; 2340 baid_data->timeout = timeout; 2341 baid_data->last_rx = jiffies; 2342 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2343 timer_setup(&baid_data->session_timer, 2344 iwl_mvm_rx_agg_session_expired, 0); 2345 baid_data->mvm = mvm; 2346 baid_data->tid = tid; 2347 baid_data->sta_id = mvm_sta->sta_id; 2348 2349 mvm_sta->tid_to_baid[tid] = baid; 2350 if (timeout) 2351 mod_timer(&baid_data->session_timer, 2352 TU_TO_EXP_TIME(timeout * 2)); 2353 2354 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2355 /* 2356 * protect the BA data with RCU to cover a case where our 2357 * internal RX sync mechanism will timeout (not that it's 2358 * supposed to happen) and we will free the session data while 2359 * RX is being processed in parallel 2360 */ 2361 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2362 mvm_sta->sta_id, tid, baid); 2363 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2364 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2365 } else { 2366 u8 baid = mvm_sta->tid_to_baid[tid]; 2367 2368 if (mvm->rx_ba_sessions > 0) 2369 /* check that restart flow didn't zero the counter */ 2370 mvm->rx_ba_sessions--; 2371 if (!iwl_mvm_has_new_rx_api(mvm)) 2372 return 0; 2373 2374 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2375 return -EINVAL; 2376 2377 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2378 if (WARN_ON(!baid_data)) 2379 return -EINVAL; 2380 2381 /* synchronize all rx queues so we can safely delete */ 2382 iwl_mvm_free_reorder(mvm, baid_data); 2383 del_timer_sync(&baid_data->session_timer); 2384 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2385 kfree_rcu(baid_data, rcu_head); 2386 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2387 } 2388 return 0; 2389 2390 out_free: 2391 kfree(baid_data); 2392 return ret; 2393 } 2394 2395 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2396 int tid, u8 queue, bool start) 2397 { 2398 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2399 struct iwl_mvm_add_sta_cmd cmd = {}; 2400 int ret; 2401 u32 status; 2402 2403 lockdep_assert_held(&mvm->mutex); 2404 2405 if (start) { 2406 mvm_sta->tfd_queue_msk |= BIT(queue); 2407 mvm_sta->tid_disable_agg &= ~BIT(tid); 2408 } else { 2409 /* In DQA-mode the queue isn't removed on agg termination */ 2410 mvm_sta->tid_disable_agg |= BIT(tid); 2411 } 2412 2413 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2414 cmd.sta_id = mvm_sta->sta_id; 2415 cmd.add_modify = STA_MODE_MODIFY; 2416 if (!iwl_mvm_has_new_tx_api(mvm)) 2417 cmd.modify_mask = STA_MODIFY_QUEUES; 2418 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2419 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2420 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2421 2422 status = ADD_STA_SUCCESS; 2423 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2424 iwl_mvm_add_sta_cmd_size(mvm), 2425 &cmd, &status); 2426 if (ret) 2427 return ret; 2428 2429 switch (status & IWL_ADD_STA_STATUS_MASK) { 2430 case ADD_STA_SUCCESS: 2431 break; 2432 default: 2433 ret = -EIO; 2434 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2435 start ? "start" : "stopp", status); 2436 break; 2437 } 2438 2439 return ret; 2440 } 2441 2442 const u8 tid_to_mac80211_ac[] = { 2443 IEEE80211_AC_BE, 2444 IEEE80211_AC_BK, 2445 IEEE80211_AC_BK, 2446 IEEE80211_AC_BE, 2447 IEEE80211_AC_VI, 2448 IEEE80211_AC_VI, 2449 IEEE80211_AC_VO, 2450 IEEE80211_AC_VO, 2451 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2452 }; 2453 2454 static const u8 tid_to_ucode_ac[] = { 2455 AC_BE, 2456 AC_BK, 2457 AC_BK, 2458 AC_BE, 2459 AC_VI, 2460 AC_VI, 2461 AC_VO, 2462 AC_VO, 2463 }; 2464 2465 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2466 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2467 { 2468 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2469 struct iwl_mvm_tid_data *tid_data; 2470 u16 normalized_ssn; 2471 int txq_id; 2472 int ret; 2473 2474 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2475 return -EINVAL; 2476 2477 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2478 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2479 IWL_ERR(mvm, 2480 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2481 mvmsta->tid_data[tid].state); 2482 return -ENXIO; 2483 } 2484 2485 lockdep_assert_held(&mvm->mutex); 2486 2487 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2488 iwl_mvm_has_new_tx_api(mvm)) { 2489 u8 ac = tid_to_mac80211_ac[tid]; 2490 2491 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2492 if (ret) 2493 return ret; 2494 } 2495 2496 spin_lock_bh(&mvmsta->lock); 2497 2498 /* possible race condition - we entered D0i3 while starting agg */ 2499 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2500 spin_unlock_bh(&mvmsta->lock); 2501 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2502 return -EIO; 2503 } 2504 2505 spin_lock(&mvm->queue_info_lock); 2506 2507 /* 2508 * Note the possible cases: 2509 * 1. An enabled TXQ - TXQ needs to become agg'ed 2510 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2511 * it as reserved 2512 */ 2513 txq_id = mvmsta->tid_data[tid].txq_id; 2514 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2515 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2516 IWL_MVM_DQA_MIN_DATA_QUEUE, 2517 IWL_MVM_DQA_MAX_DATA_QUEUE); 2518 if (txq_id < 0) { 2519 ret = txq_id; 2520 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2521 goto release_locks; 2522 } 2523 2524 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2525 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2526 } else if (unlikely(mvm->queue_info[txq_id].status == 2527 IWL_MVM_QUEUE_SHARED)) { 2528 ret = -ENXIO; 2529 IWL_DEBUG_TX_QUEUES(mvm, 2530 "Can't start tid %d agg on shared queue!\n", 2531 tid); 2532 goto release_locks; 2533 } 2534 2535 spin_unlock(&mvm->queue_info_lock); 2536 2537 IWL_DEBUG_TX_QUEUES(mvm, 2538 "AGG for tid %d will be on queue #%d\n", 2539 tid, txq_id); 2540 2541 tid_data = &mvmsta->tid_data[tid]; 2542 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2543 tid_data->txq_id = txq_id; 2544 *ssn = tid_data->ssn; 2545 2546 IWL_DEBUG_TX_QUEUES(mvm, 2547 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2548 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2549 tid_data->next_reclaimed); 2550 2551 /* 2552 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2553 * to align the wrap around of ssn so we compare relevant values. 2554 */ 2555 normalized_ssn = tid_data->ssn; 2556 if (mvm->trans->cfg->gen2) 2557 normalized_ssn &= 0xff; 2558 2559 if (normalized_ssn == tid_data->next_reclaimed) { 2560 tid_data->state = IWL_AGG_STARTING; 2561 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2562 } else { 2563 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2564 } 2565 2566 ret = 0; 2567 goto out; 2568 2569 release_locks: 2570 spin_unlock(&mvm->queue_info_lock); 2571 out: 2572 spin_unlock_bh(&mvmsta->lock); 2573 2574 return ret; 2575 } 2576 2577 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2578 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2579 bool amsdu) 2580 { 2581 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2582 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2583 unsigned int wdg_timeout = 2584 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2585 int queue, ret; 2586 bool alloc_queue = true; 2587 enum iwl_mvm_queue_status queue_status; 2588 u16 ssn; 2589 2590 struct iwl_trans_txq_scd_cfg cfg = { 2591 .sta_id = mvmsta->sta_id, 2592 .tid = tid, 2593 .frame_limit = buf_size, 2594 .aggregate = true, 2595 }; 2596 2597 /* 2598 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2599 * manager, so this function should never be called in this case. 2600 */ 2601 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2602 return -EINVAL; 2603 2604 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2605 != IWL_MAX_TID_COUNT); 2606 2607 spin_lock_bh(&mvmsta->lock); 2608 ssn = tid_data->ssn; 2609 queue = tid_data->txq_id; 2610 tid_data->state = IWL_AGG_ON; 2611 mvmsta->agg_tids |= BIT(tid); 2612 tid_data->ssn = 0xffff; 2613 tid_data->amsdu_in_ampdu_allowed = amsdu; 2614 spin_unlock_bh(&mvmsta->lock); 2615 2616 if (iwl_mvm_has_new_tx_api(mvm)) { 2617 /* 2618 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2619 * would have failed, so if we are here there is no need to 2620 * allocate a queue. 2621 * However, if aggregation size is different than the default 2622 * size, the scheduler should be reconfigured. 2623 * We cannot do this with the new TX API, so return unsupported 2624 * for now, until it will be offloaded to firmware.. 2625 * Note that if SCD default value changes - this condition 2626 * should be updated as well. 2627 */ 2628 if (buf_size < IWL_FRAME_LIMIT) 2629 return -ENOTSUPP; 2630 2631 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2632 if (ret) 2633 return -EIO; 2634 goto out; 2635 } 2636 2637 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2638 2639 spin_lock_bh(&mvm->queue_info_lock); 2640 queue_status = mvm->queue_info[queue].status; 2641 spin_unlock_bh(&mvm->queue_info_lock); 2642 2643 /* Maybe there is no need to even alloc a queue... */ 2644 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2645 alloc_queue = false; 2646 2647 /* 2648 * Only reconfig the SCD for the queue if the window size has 2649 * changed from current (become smaller) 2650 */ 2651 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2652 /* 2653 * If reconfiguring an existing queue, it first must be 2654 * drained 2655 */ 2656 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2657 BIT(queue)); 2658 if (ret) { 2659 IWL_ERR(mvm, 2660 "Error draining queue before reconfig\n"); 2661 return ret; 2662 } 2663 2664 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2665 mvmsta->sta_id, tid, 2666 buf_size, ssn); 2667 if (ret) { 2668 IWL_ERR(mvm, 2669 "Error reconfiguring TXQ #%d\n", queue); 2670 return ret; 2671 } 2672 } 2673 2674 if (alloc_queue) 2675 iwl_mvm_enable_txq(mvm, queue, 2676 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2677 &cfg, wdg_timeout); 2678 2679 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2680 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2681 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2682 if (ret) 2683 return -EIO; 2684 } 2685 2686 /* No need to mark as reserved */ 2687 spin_lock_bh(&mvm->queue_info_lock); 2688 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2689 spin_unlock_bh(&mvm->queue_info_lock); 2690 2691 out: 2692 /* 2693 * Even though in theory the peer could have different 2694 * aggregation reorder buffer sizes for different sessions, 2695 * our ucode doesn't allow for that and has a global limit 2696 * for each station. Therefore, use the minimum of all the 2697 * aggregation sessions and our default value. 2698 */ 2699 mvmsta->max_agg_bufsize = 2700 min(mvmsta->max_agg_bufsize, buf_size); 2701 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2702 2703 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2704 sta->addr, tid); 2705 2706 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false); 2707 } 2708 2709 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2710 struct iwl_mvm_sta *mvmsta, 2711 struct iwl_mvm_tid_data *tid_data) 2712 { 2713 u16 txq_id = tid_data->txq_id; 2714 2715 if (iwl_mvm_has_new_tx_api(mvm)) 2716 return; 2717 2718 spin_lock_bh(&mvm->queue_info_lock); 2719 /* 2720 * The TXQ is marked as reserved only if no traffic came through yet 2721 * This means no traffic has been sent on this TID (agg'd or not), so 2722 * we no longer have use for the queue. Since it hasn't even been 2723 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2724 * free. 2725 */ 2726 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 2727 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2728 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 2729 } 2730 2731 spin_unlock_bh(&mvm->queue_info_lock); 2732 } 2733 2734 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2735 struct ieee80211_sta *sta, u16 tid) 2736 { 2737 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2738 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2739 u16 txq_id; 2740 int err; 2741 2742 /* 2743 * If mac80211 is cleaning its state, then say that we finished since 2744 * our state has been cleared anyway. 2745 */ 2746 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2747 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2748 return 0; 2749 } 2750 2751 spin_lock_bh(&mvmsta->lock); 2752 2753 txq_id = tid_data->txq_id; 2754 2755 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2756 mvmsta->sta_id, tid, txq_id, tid_data->state); 2757 2758 mvmsta->agg_tids &= ~BIT(tid); 2759 2760 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 2761 2762 switch (tid_data->state) { 2763 case IWL_AGG_ON: 2764 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2765 2766 IWL_DEBUG_TX_QUEUES(mvm, 2767 "ssn = %d, next_recl = %d\n", 2768 tid_data->ssn, tid_data->next_reclaimed); 2769 2770 tid_data->ssn = 0xffff; 2771 tid_data->state = IWL_AGG_OFF; 2772 spin_unlock_bh(&mvmsta->lock); 2773 2774 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2775 2776 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2777 return 0; 2778 case IWL_AGG_STARTING: 2779 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2780 /* 2781 * The agg session has been stopped before it was set up. This 2782 * can happen when the AddBA timer times out for example. 2783 */ 2784 2785 /* No barriers since we are under mutex */ 2786 lockdep_assert_held(&mvm->mutex); 2787 2788 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2789 tid_data->state = IWL_AGG_OFF; 2790 err = 0; 2791 break; 2792 default: 2793 IWL_ERR(mvm, 2794 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2795 mvmsta->sta_id, tid, tid_data->state); 2796 IWL_ERR(mvm, 2797 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2798 err = -EINVAL; 2799 } 2800 2801 spin_unlock_bh(&mvmsta->lock); 2802 2803 return err; 2804 } 2805 2806 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2807 struct ieee80211_sta *sta, u16 tid) 2808 { 2809 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2810 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2811 u16 txq_id; 2812 enum iwl_mvm_agg_state old_state; 2813 2814 /* 2815 * First set the agg state to OFF to avoid calling 2816 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2817 */ 2818 spin_lock_bh(&mvmsta->lock); 2819 txq_id = tid_data->txq_id; 2820 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2821 mvmsta->sta_id, tid, txq_id, tid_data->state); 2822 old_state = tid_data->state; 2823 tid_data->state = IWL_AGG_OFF; 2824 mvmsta->agg_tids &= ~BIT(tid); 2825 spin_unlock_bh(&mvmsta->lock); 2826 2827 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 2828 2829 if (old_state >= IWL_AGG_ON) { 2830 iwl_mvm_drain_sta(mvm, mvmsta, true); 2831 2832 if (iwl_mvm_has_new_tx_api(mvm)) { 2833 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2834 BIT(tid), 0)) 2835 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2836 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2837 } else { 2838 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2839 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2840 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2841 } 2842 2843 iwl_mvm_drain_sta(mvm, mvmsta, false); 2844 2845 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2846 } 2847 2848 return 0; 2849 } 2850 2851 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2852 { 2853 int i, max = -1, max_offs = -1; 2854 2855 lockdep_assert_held(&mvm->mutex); 2856 2857 /* Pick the unused key offset with the highest 'deleted' 2858 * counter. Every time a key is deleted, all the counters 2859 * are incremented and the one that was just deleted is 2860 * reset to zero. Thus, the highest counter is the one 2861 * that was deleted longest ago. Pick that one. 2862 */ 2863 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2864 if (test_bit(i, mvm->fw_key_table)) 2865 continue; 2866 if (mvm->fw_key_deleted[i] > max) { 2867 max = mvm->fw_key_deleted[i]; 2868 max_offs = i; 2869 } 2870 } 2871 2872 if (max_offs < 0) 2873 return STA_KEY_IDX_INVALID; 2874 2875 return max_offs; 2876 } 2877 2878 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2879 struct ieee80211_vif *vif, 2880 struct ieee80211_sta *sta) 2881 { 2882 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2883 2884 if (sta) 2885 return iwl_mvm_sta_from_mac80211(sta); 2886 2887 /* 2888 * The device expects GTKs for station interfaces to be 2889 * installed as GTKs for the AP station. If we have no 2890 * station ID, then use AP's station ID. 2891 */ 2892 if (vif->type == NL80211_IFTYPE_STATION && 2893 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 2894 u8 sta_id = mvmvif->ap_sta_id; 2895 2896 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2897 lockdep_is_held(&mvm->mutex)); 2898 2899 /* 2900 * It is possible that the 'sta' parameter is NULL, 2901 * for example when a GTK is removed - the sta_id will then 2902 * be the AP ID, and no station was passed by mac80211. 2903 */ 2904 if (IS_ERR_OR_NULL(sta)) 2905 return NULL; 2906 2907 return iwl_mvm_sta_from_mac80211(sta); 2908 } 2909 2910 return NULL; 2911 } 2912 2913 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2914 u32 sta_id, 2915 struct ieee80211_key_conf *key, bool mcast, 2916 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2917 u8 key_offset, bool mfp) 2918 { 2919 union { 2920 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2921 struct iwl_mvm_add_sta_key_cmd cmd; 2922 } u = {}; 2923 __le16 key_flags; 2924 int ret; 2925 u32 status; 2926 u16 keyidx; 2927 u64 pn = 0; 2928 int i, size; 2929 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2930 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2931 2932 if (sta_id == IWL_MVM_INVALID_STA) 2933 return -EINVAL; 2934 2935 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 2936 STA_KEY_FLG_KEYID_MSK; 2937 key_flags = cpu_to_le16(keyidx); 2938 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2939 2940 switch (key->cipher) { 2941 case WLAN_CIPHER_SUITE_TKIP: 2942 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2943 if (new_api) { 2944 memcpy((void *)&u.cmd.tx_mic_key, 2945 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 2946 IWL_MIC_KEY_SIZE); 2947 2948 memcpy((void *)&u.cmd.rx_mic_key, 2949 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 2950 IWL_MIC_KEY_SIZE); 2951 pn = atomic64_read(&key->tx_pn); 2952 2953 } else { 2954 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 2955 for (i = 0; i < 5; i++) 2956 u.cmd_v1.tkip_rx_ttak[i] = 2957 cpu_to_le16(tkip_p1k[i]); 2958 } 2959 memcpy(u.cmd.common.key, key->key, key->keylen); 2960 break; 2961 case WLAN_CIPHER_SUITE_CCMP: 2962 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2963 memcpy(u.cmd.common.key, key->key, key->keylen); 2964 if (new_api) 2965 pn = atomic64_read(&key->tx_pn); 2966 break; 2967 case WLAN_CIPHER_SUITE_WEP104: 2968 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2969 /* fall through */ 2970 case WLAN_CIPHER_SUITE_WEP40: 2971 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2972 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 2973 break; 2974 case WLAN_CIPHER_SUITE_GCMP_256: 2975 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2976 /* fall through */ 2977 case WLAN_CIPHER_SUITE_GCMP: 2978 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2979 memcpy(u.cmd.common.key, key->key, key->keylen); 2980 if (new_api) 2981 pn = atomic64_read(&key->tx_pn); 2982 break; 2983 default: 2984 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2985 memcpy(u.cmd.common.key, key->key, key->keylen); 2986 } 2987 2988 if (mcast) 2989 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2990 if (mfp) 2991 key_flags |= cpu_to_le16(STA_KEY_MFP); 2992 2993 u.cmd.common.key_offset = key_offset; 2994 u.cmd.common.key_flags = key_flags; 2995 u.cmd.common.sta_id = sta_id; 2996 2997 if (new_api) { 2998 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 2999 size = sizeof(u.cmd); 3000 } else { 3001 size = sizeof(u.cmd_v1); 3002 } 3003 3004 status = ADD_STA_SUCCESS; 3005 if (cmd_flags & CMD_ASYNC) 3006 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3007 &u.cmd); 3008 else 3009 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3010 &u.cmd, &status); 3011 3012 switch (status) { 3013 case ADD_STA_SUCCESS: 3014 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3015 break; 3016 default: 3017 ret = -EIO; 3018 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3019 break; 3020 } 3021 3022 return ret; 3023 } 3024 3025 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3026 struct ieee80211_key_conf *keyconf, 3027 u8 sta_id, bool remove_key) 3028 { 3029 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3030 3031 /* verify the key details match the required command's expectations */ 3032 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3033 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3034 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3035 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3036 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3037 return -EINVAL; 3038 3039 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3040 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3041 return -EINVAL; 3042 3043 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3044 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3045 3046 if (remove_key) { 3047 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3048 } else { 3049 struct ieee80211_key_seq seq; 3050 const u8 *pn; 3051 3052 switch (keyconf->cipher) { 3053 case WLAN_CIPHER_SUITE_AES_CMAC: 3054 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3055 break; 3056 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3057 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3058 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3059 break; 3060 default: 3061 return -EINVAL; 3062 } 3063 3064 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3065 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3066 igtk_cmd.ctrl_flags |= 3067 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3068 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3069 pn = seq.aes_cmac.pn; 3070 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3071 ((u64) pn[4] << 8) | 3072 ((u64) pn[3] << 16) | 3073 ((u64) pn[2] << 24) | 3074 ((u64) pn[1] << 32) | 3075 ((u64) pn[0] << 40)); 3076 } 3077 3078 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3079 remove_key ? "removing" : "installing", 3080 igtk_cmd.sta_id); 3081 3082 if (!iwl_mvm_has_new_rx_api(mvm)) { 3083 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3084 .ctrl_flags = igtk_cmd.ctrl_flags, 3085 .key_id = igtk_cmd.key_id, 3086 .sta_id = igtk_cmd.sta_id, 3087 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3088 }; 3089 3090 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3091 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3092 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3093 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3094 } 3095 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3096 sizeof(igtk_cmd), &igtk_cmd); 3097 } 3098 3099 3100 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3101 struct ieee80211_vif *vif, 3102 struct ieee80211_sta *sta) 3103 { 3104 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3105 3106 if (sta) 3107 return sta->addr; 3108 3109 if (vif->type == NL80211_IFTYPE_STATION && 3110 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3111 u8 sta_id = mvmvif->ap_sta_id; 3112 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3113 lockdep_is_held(&mvm->mutex)); 3114 return sta->addr; 3115 } 3116 3117 3118 return NULL; 3119 } 3120 3121 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3122 struct ieee80211_vif *vif, 3123 struct ieee80211_sta *sta, 3124 struct ieee80211_key_conf *keyconf, 3125 u8 key_offset, 3126 bool mcast) 3127 { 3128 int ret; 3129 const u8 *addr; 3130 struct ieee80211_key_seq seq; 3131 u16 p1k[5]; 3132 u32 sta_id; 3133 bool mfp = false; 3134 3135 if (sta) { 3136 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3137 3138 sta_id = mvm_sta->sta_id; 3139 mfp = sta->mfp; 3140 } else if (vif->type == NL80211_IFTYPE_AP && 3141 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3142 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3143 3144 sta_id = mvmvif->mcast_sta.sta_id; 3145 } else { 3146 IWL_ERR(mvm, "Failed to find station id\n"); 3147 return -EINVAL; 3148 } 3149 3150 switch (keyconf->cipher) { 3151 case WLAN_CIPHER_SUITE_TKIP: 3152 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3153 /* get phase 1 key from mac80211 */ 3154 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3155 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3156 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3157 seq.tkip.iv32, p1k, 0, key_offset, 3158 mfp); 3159 break; 3160 case WLAN_CIPHER_SUITE_CCMP: 3161 case WLAN_CIPHER_SUITE_WEP40: 3162 case WLAN_CIPHER_SUITE_WEP104: 3163 case WLAN_CIPHER_SUITE_GCMP: 3164 case WLAN_CIPHER_SUITE_GCMP_256: 3165 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3166 0, NULL, 0, key_offset, mfp); 3167 break; 3168 default: 3169 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3170 0, NULL, 0, key_offset, mfp); 3171 } 3172 3173 return ret; 3174 } 3175 3176 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3177 struct ieee80211_key_conf *keyconf, 3178 bool mcast) 3179 { 3180 union { 3181 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3182 struct iwl_mvm_add_sta_key_cmd cmd; 3183 } u = {}; 3184 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3185 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3186 __le16 key_flags; 3187 int ret, size; 3188 u32 status; 3189 3190 /* This is a valid situation for GTK removal */ 3191 if (sta_id == IWL_MVM_INVALID_STA) 3192 return 0; 3193 3194 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3195 STA_KEY_FLG_KEYID_MSK); 3196 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3197 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3198 3199 if (mcast) 3200 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3201 3202 /* 3203 * The fields assigned here are in the same location at the start 3204 * of the command, so we can do this union trick. 3205 */ 3206 u.cmd.common.key_flags = key_flags; 3207 u.cmd.common.key_offset = keyconf->hw_key_idx; 3208 u.cmd.common.sta_id = sta_id; 3209 3210 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3211 3212 status = ADD_STA_SUCCESS; 3213 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3214 &status); 3215 3216 switch (status) { 3217 case ADD_STA_SUCCESS: 3218 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3219 break; 3220 default: 3221 ret = -EIO; 3222 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3223 break; 3224 } 3225 3226 return ret; 3227 } 3228 3229 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3230 struct ieee80211_vif *vif, 3231 struct ieee80211_sta *sta, 3232 struct ieee80211_key_conf *keyconf, 3233 u8 key_offset) 3234 { 3235 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3236 struct iwl_mvm_sta *mvm_sta; 3237 u8 sta_id = IWL_MVM_INVALID_STA; 3238 int ret; 3239 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3240 3241 lockdep_assert_held(&mvm->mutex); 3242 3243 if (vif->type != NL80211_IFTYPE_AP || 3244 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3245 /* Get the station id from the mvm local station table */ 3246 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3247 if (!mvm_sta) { 3248 IWL_ERR(mvm, "Failed to find station\n"); 3249 return -EINVAL; 3250 } 3251 sta_id = mvm_sta->sta_id; 3252 3253 /* 3254 * It is possible that the 'sta' parameter is NULL, and thus 3255 * there is a need to retrieve the sta from the local station 3256 * table. 3257 */ 3258 if (!sta) { 3259 sta = rcu_dereference_protected( 3260 mvm->fw_id_to_mac_id[sta_id], 3261 lockdep_is_held(&mvm->mutex)); 3262 if (IS_ERR_OR_NULL(sta)) { 3263 IWL_ERR(mvm, "Invalid station id\n"); 3264 return -EINVAL; 3265 } 3266 } 3267 3268 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3269 return -EINVAL; 3270 } else { 3271 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3272 3273 sta_id = mvmvif->mcast_sta.sta_id; 3274 } 3275 3276 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3277 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3278 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3279 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3280 goto end; 3281 } 3282 3283 /* If the key_offset is not pre-assigned, we need to find a 3284 * new offset to use. In normal cases, the offset is not 3285 * pre-assigned, but during HW_RESTART we want to reuse the 3286 * same indices, so we pass them when this function is called. 3287 * 3288 * In D3 entry, we need to hardcoded the indices (because the 3289 * firmware hardcodes the PTK offset to 0). In this case, we 3290 * need to make sure we don't overwrite the hw_key_idx in the 3291 * keyconf structure, because otherwise we cannot configure 3292 * the original ones back when resuming. 3293 */ 3294 if (key_offset == STA_KEY_IDX_INVALID) { 3295 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3296 if (key_offset == STA_KEY_IDX_INVALID) 3297 return -ENOSPC; 3298 keyconf->hw_key_idx = key_offset; 3299 } 3300 3301 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3302 if (ret) 3303 goto end; 3304 3305 /* 3306 * For WEP, the same key is used for multicast and unicast. Upload it 3307 * again, using the same key offset, and now pointing the other one 3308 * to the same key slot (offset). 3309 * If this fails, remove the original as well. 3310 */ 3311 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3312 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3313 sta) { 3314 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3315 key_offset, !mcast); 3316 if (ret) { 3317 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3318 goto end; 3319 } 3320 } 3321 3322 __set_bit(key_offset, mvm->fw_key_table); 3323 3324 end: 3325 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3326 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3327 sta ? sta->addr : zero_addr, ret); 3328 return ret; 3329 } 3330 3331 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3332 struct ieee80211_vif *vif, 3333 struct ieee80211_sta *sta, 3334 struct ieee80211_key_conf *keyconf) 3335 { 3336 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3337 struct iwl_mvm_sta *mvm_sta; 3338 u8 sta_id = IWL_MVM_INVALID_STA; 3339 int ret, i; 3340 3341 lockdep_assert_held(&mvm->mutex); 3342 3343 /* Get the station from the mvm local station table */ 3344 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3345 if (mvm_sta) 3346 sta_id = mvm_sta->sta_id; 3347 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3348 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3349 3350 3351 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3352 keyconf->keyidx, sta_id); 3353 3354 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3355 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3356 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3357 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3358 3359 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3360 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3361 keyconf->hw_key_idx); 3362 return -ENOENT; 3363 } 3364 3365 /* track which key was deleted last */ 3366 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3367 if (mvm->fw_key_deleted[i] < U8_MAX) 3368 mvm->fw_key_deleted[i]++; 3369 } 3370 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3371 3372 if (sta && !mvm_sta) { 3373 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3374 return 0; 3375 } 3376 3377 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3378 if (ret) 3379 return ret; 3380 3381 /* delete WEP key twice to get rid of (now useless) offset */ 3382 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3383 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3384 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3385 3386 return ret; 3387 } 3388 3389 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3390 struct ieee80211_vif *vif, 3391 struct ieee80211_key_conf *keyconf, 3392 struct ieee80211_sta *sta, u32 iv32, 3393 u16 *phase1key) 3394 { 3395 struct iwl_mvm_sta *mvm_sta; 3396 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3397 bool mfp = sta ? sta->mfp : false; 3398 3399 rcu_read_lock(); 3400 3401 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3402 if (WARN_ON_ONCE(!mvm_sta)) 3403 goto unlock; 3404 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3405 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3406 mfp); 3407 3408 unlock: 3409 rcu_read_unlock(); 3410 } 3411 3412 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3413 struct ieee80211_sta *sta) 3414 { 3415 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3416 struct iwl_mvm_add_sta_cmd cmd = { 3417 .add_modify = STA_MODE_MODIFY, 3418 .sta_id = mvmsta->sta_id, 3419 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3420 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3421 }; 3422 int ret; 3423 3424 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3425 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3426 if (ret) 3427 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3428 } 3429 3430 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3431 struct ieee80211_sta *sta, 3432 enum ieee80211_frame_release_type reason, 3433 u16 cnt, u16 tids, bool more_data, 3434 bool single_sta_queue) 3435 { 3436 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3437 struct iwl_mvm_add_sta_cmd cmd = { 3438 .add_modify = STA_MODE_MODIFY, 3439 .sta_id = mvmsta->sta_id, 3440 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3441 .sleep_tx_count = cpu_to_le16(cnt), 3442 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3443 }; 3444 int tid, ret; 3445 unsigned long _tids = tids; 3446 3447 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3448 * Note that this field is reserved and unused by firmware not 3449 * supporting GO uAPSD, so it's safe to always do this. 3450 */ 3451 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3452 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3453 3454 /* If we're releasing frames from aggregation or dqa queues then check 3455 * if all the queues that we're releasing frames from, combined, have: 3456 * - more frames than the service period, in which case more_data 3457 * needs to be set 3458 * - fewer than 'cnt' frames, in which case we need to adjust the 3459 * firmware command (but do that unconditionally) 3460 */ 3461 if (single_sta_queue) { 3462 int remaining = cnt; 3463 int sleep_tx_count; 3464 3465 spin_lock_bh(&mvmsta->lock); 3466 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3467 struct iwl_mvm_tid_data *tid_data; 3468 u16 n_queued; 3469 3470 tid_data = &mvmsta->tid_data[tid]; 3471 3472 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3473 if (n_queued > remaining) { 3474 more_data = true; 3475 remaining = 0; 3476 break; 3477 } 3478 remaining -= n_queued; 3479 } 3480 sleep_tx_count = cnt - remaining; 3481 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3482 mvmsta->sleep_tx_count = sleep_tx_count; 3483 spin_unlock_bh(&mvmsta->lock); 3484 3485 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3486 if (WARN_ON(cnt - remaining == 0)) { 3487 ieee80211_sta_eosp(sta); 3488 return; 3489 } 3490 } 3491 3492 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3493 if (more_data) 3494 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3495 3496 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3497 mvmsta->next_status_eosp = true; 3498 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3499 } else { 3500 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3501 } 3502 3503 /* block the Tx queues until the FW updated the sleep Tx count */ 3504 iwl_trans_block_txq_ptrs(mvm->trans, true); 3505 3506 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3507 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3508 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3509 if (ret) 3510 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3511 } 3512 3513 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3514 struct iwl_rx_cmd_buffer *rxb) 3515 { 3516 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3517 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3518 struct ieee80211_sta *sta; 3519 u32 sta_id = le32_to_cpu(notif->sta_id); 3520 3521 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3522 return; 3523 3524 rcu_read_lock(); 3525 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3526 if (!IS_ERR_OR_NULL(sta)) 3527 ieee80211_sta_eosp(sta); 3528 rcu_read_unlock(); 3529 } 3530 3531 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3532 struct iwl_mvm_sta *mvmsta, bool disable) 3533 { 3534 struct iwl_mvm_add_sta_cmd cmd = { 3535 .add_modify = STA_MODE_MODIFY, 3536 .sta_id = mvmsta->sta_id, 3537 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3538 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3539 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3540 }; 3541 int ret; 3542 3543 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3544 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3545 if (ret) 3546 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3547 } 3548 3549 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3550 struct ieee80211_sta *sta, 3551 bool disable) 3552 { 3553 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3554 3555 spin_lock_bh(&mvm_sta->lock); 3556 3557 if (mvm_sta->disable_tx == disable) { 3558 spin_unlock_bh(&mvm_sta->lock); 3559 return; 3560 } 3561 3562 mvm_sta->disable_tx = disable; 3563 3564 /* Tell mac80211 to start/stop queuing tx for this station */ 3565 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3566 3567 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3568 3569 spin_unlock_bh(&mvm_sta->lock); 3570 } 3571 3572 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3573 struct iwl_mvm_vif *mvmvif, 3574 struct iwl_mvm_int_sta *sta, 3575 bool disable) 3576 { 3577 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3578 struct iwl_mvm_add_sta_cmd cmd = { 3579 .add_modify = STA_MODE_MODIFY, 3580 .sta_id = sta->sta_id, 3581 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3582 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3583 .mac_id_n_color = cpu_to_le32(id), 3584 }; 3585 int ret; 3586 3587 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3588 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3589 if (ret) 3590 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3591 } 3592 3593 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3594 struct iwl_mvm_vif *mvmvif, 3595 bool disable) 3596 { 3597 struct ieee80211_sta *sta; 3598 struct iwl_mvm_sta *mvm_sta; 3599 int i; 3600 3601 lockdep_assert_held(&mvm->mutex); 3602 3603 /* Block/unblock all the stations of the given mvmvif */ 3604 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3605 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3606 lockdep_is_held(&mvm->mutex)); 3607 if (IS_ERR_OR_NULL(sta)) 3608 continue; 3609 3610 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3611 if (mvm_sta->mac_id_n_color != 3612 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3613 continue; 3614 3615 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3616 } 3617 3618 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3619 return; 3620 3621 /* Need to block/unblock also multicast station */ 3622 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3623 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3624 &mvmvif->mcast_sta, disable); 3625 3626 /* 3627 * Only unblock the broadcast station (FW blocks it for immediate 3628 * quiet, not the driver) 3629 */ 3630 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3631 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3632 &mvmvif->bcast_sta, disable); 3633 } 3634 3635 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3636 { 3637 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3638 struct iwl_mvm_sta *mvmsta; 3639 3640 rcu_read_lock(); 3641 3642 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3643 3644 if (!WARN_ON(!mvmsta)) 3645 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3646 3647 rcu_read_unlock(); 3648 } 3649 3650 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3651 { 3652 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3653 3654 /* 3655 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3656 * to align the wrap around of ssn so we compare relevant values. 3657 */ 3658 if (mvm->trans->cfg->gen2) 3659 sn &= 0xff; 3660 3661 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3662 } 3663