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 - 2019 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 - 2019 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; 317 318 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 319 return -EINVAL; 320 321 sta_id = mvm->queue_info[queue].ra_sta_id; 322 323 rcu_read_lock(); 324 325 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 326 327 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 328 rcu_read_unlock(); 329 return -EINVAL; 330 } 331 332 mvmsta = iwl_mvm_sta_from_mac80211(sta); 333 334 mvmsta->tid_disable_agg |= disable_agg_tids; 335 336 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 337 cmd.sta_id = mvmsta->sta_id; 338 cmd.add_modify = STA_MODE_MODIFY; 339 cmd.modify_mask = STA_MODIFY_QUEUES; 340 if (disable_agg_tids) 341 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 342 if (remove_queue) 343 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 344 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 345 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 346 347 rcu_read_unlock(); 348 349 /* Notify FW of queue removal from the STA queues */ 350 status = ADD_STA_SUCCESS; 351 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 352 iwl_mvm_add_sta_cmd_size(mvm), 353 &cmd, &status); 354 } 355 356 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 357 int queue, u8 tid, u8 flags) 358 { 359 struct iwl_scd_txq_cfg_cmd cmd = { 360 .scd_queue = queue, 361 .action = SCD_CFG_DISABLE_QUEUE, 362 }; 363 int ret; 364 365 if (iwl_mvm_has_new_tx_api(mvm)) { 366 iwl_trans_txq_free(mvm->trans, queue); 367 368 return 0; 369 } 370 371 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 372 return 0; 373 374 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 375 376 cmd.action = mvm->queue_info[queue].tid_bitmap ? 377 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 378 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 379 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 380 381 IWL_DEBUG_TX_QUEUES(mvm, 382 "Disabling TXQ #%d tids=0x%x\n", 383 queue, 384 mvm->queue_info[queue].tid_bitmap); 385 386 /* If the queue is still enabled - nothing left to do in this func */ 387 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 388 return 0; 389 390 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 391 cmd.tid = mvm->queue_info[queue].txq_tid; 392 393 /* Make sure queue info is correct even though we overwrite it */ 394 WARN(mvm->queue_info[queue].tid_bitmap, 395 "TXQ #%d info out-of-sync - tids=0x%x\n", 396 queue, mvm->queue_info[queue].tid_bitmap); 397 398 /* If we are here - the queue is freed and we can zero out these vals */ 399 mvm->queue_info[queue].tid_bitmap = 0; 400 401 if (sta) { 402 struct iwl_mvm_txq *mvmtxq = 403 iwl_mvm_txq_from_tid(sta, tid); 404 405 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 406 } 407 408 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 409 mvm->queue_info[queue].reserved = false; 410 411 iwl_trans_txq_disable(mvm->trans, queue, false); 412 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 413 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 414 415 if (ret) 416 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 417 queue, ret); 418 return ret; 419 } 420 421 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 422 { 423 struct ieee80211_sta *sta; 424 struct iwl_mvm_sta *mvmsta; 425 unsigned long tid_bitmap; 426 unsigned long agg_tids = 0; 427 u8 sta_id; 428 int tid; 429 430 lockdep_assert_held(&mvm->mutex); 431 432 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 433 return -EINVAL; 434 435 sta_id = mvm->queue_info[queue].ra_sta_id; 436 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 437 438 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 439 lockdep_is_held(&mvm->mutex)); 440 441 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 442 return -EINVAL; 443 444 mvmsta = iwl_mvm_sta_from_mac80211(sta); 445 446 spin_lock_bh(&mvmsta->lock); 447 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 448 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 449 agg_tids |= BIT(tid); 450 } 451 spin_unlock_bh(&mvmsta->lock); 452 453 return agg_tids; 454 } 455 456 /* 457 * Remove a queue from a station's resources. 458 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 459 * doesn't disable the queue 460 */ 461 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 462 { 463 struct ieee80211_sta *sta; 464 struct iwl_mvm_sta *mvmsta; 465 unsigned long tid_bitmap; 466 unsigned long disable_agg_tids = 0; 467 u8 sta_id; 468 int tid; 469 470 lockdep_assert_held(&mvm->mutex); 471 472 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 473 return -EINVAL; 474 475 sta_id = mvm->queue_info[queue].ra_sta_id; 476 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 477 478 rcu_read_lock(); 479 480 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 481 482 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 483 rcu_read_unlock(); 484 return 0; 485 } 486 487 mvmsta = iwl_mvm_sta_from_mac80211(sta); 488 489 spin_lock_bh(&mvmsta->lock); 490 /* Unmap MAC queues and TIDs from this queue */ 491 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 492 struct iwl_mvm_txq *mvmtxq = 493 iwl_mvm_txq_from_tid(sta, tid); 494 495 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 496 disable_agg_tids |= BIT(tid); 497 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 498 499 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 500 } 501 502 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 503 spin_unlock_bh(&mvmsta->lock); 504 505 rcu_read_unlock(); 506 507 /* 508 * The TX path may have been using this TXQ_ID from the tid_data, 509 * so make sure it's no longer running so that we can safely reuse 510 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 511 * above, but nothing guarantees we've stopped using them. Thus, 512 * without this, we could get to iwl_mvm_disable_txq() and remove 513 * the queue while still sending frames to it. 514 */ 515 synchronize_net(); 516 517 return disable_agg_tids; 518 } 519 520 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 521 struct ieee80211_sta *old_sta, 522 u8 new_sta_id) 523 { 524 struct iwl_mvm_sta *mvmsta; 525 u8 sta_id, tid; 526 unsigned long disable_agg_tids = 0; 527 bool same_sta; 528 int ret; 529 530 lockdep_assert_held(&mvm->mutex); 531 532 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 533 return -EINVAL; 534 535 sta_id = mvm->queue_info[queue].ra_sta_id; 536 tid = mvm->queue_info[queue].txq_tid; 537 538 same_sta = sta_id == new_sta_id; 539 540 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 541 if (WARN_ON(!mvmsta)) 542 return -EINVAL; 543 544 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 545 /* Disable the queue */ 546 if (disable_agg_tids) 547 iwl_mvm_invalidate_sta_queue(mvm, queue, 548 disable_agg_tids, false); 549 550 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 551 if (ret) { 552 IWL_ERR(mvm, 553 "Failed to free inactive queue %d (ret=%d)\n", 554 queue, ret); 555 556 return ret; 557 } 558 559 /* If TXQ is allocated to another STA, update removal in FW */ 560 if (!same_sta) 561 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 562 563 return 0; 564 } 565 566 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 567 unsigned long tfd_queue_mask, u8 ac) 568 { 569 int queue = 0; 570 u8 ac_to_queue[IEEE80211_NUM_ACS]; 571 int i; 572 573 /* 574 * This protects us against grabbing a queue that's being reconfigured 575 * by the inactivity checker. 576 */ 577 lockdep_assert_held(&mvm->mutex); 578 579 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 580 return -EINVAL; 581 582 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 583 584 /* See what ACs the existing queues for this STA have */ 585 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 586 /* Only DATA queues can be shared */ 587 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 588 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 589 continue; 590 591 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 592 } 593 594 /* 595 * The queue to share is chosen only from DATA queues as follows (in 596 * descending priority): 597 * 1. An AC_BE queue 598 * 2. Same AC queue 599 * 3. Highest AC queue that is lower than new AC 600 * 4. Any existing AC (there always is at least 1 DATA queue) 601 */ 602 603 /* Priority 1: An AC_BE queue */ 604 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 605 queue = ac_to_queue[IEEE80211_AC_BE]; 606 /* Priority 2: Same AC queue */ 607 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 608 queue = ac_to_queue[ac]; 609 /* Priority 3a: If new AC is VO and VI exists - use VI */ 610 else if (ac == IEEE80211_AC_VO && 611 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 612 queue = ac_to_queue[IEEE80211_AC_VI]; 613 /* Priority 3b: No BE so only AC less than the new one is BK */ 614 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 615 queue = ac_to_queue[IEEE80211_AC_BK]; 616 /* Priority 4a: No BE nor BK - use VI if exists */ 617 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 618 queue = ac_to_queue[IEEE80211_AC_VI]; 619 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 620 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 621 queue = ac_to_queue[IEEE80211_AC_VO]; 622 623 /* Make sure queue found (or not) is legal */ 624 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 625 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 626 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 627 IWL_ERR(mvm, "No DATA queues available to share\n"); 628 return -ENOSPC; 629 } 630 631 return queue; 632 } 633 634 /* 635 * If a given queue has a higher AC than the TID stream that is being compared 636 * to, the queue needs to be redirected to the lower AC. This function does that 637 * in such a case, otherwise - if no redirection required - it does nothing, 638 * unless the %force param is true. 639 */ 640 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 641 int ac, int ssn, unsigned int wdg_timeout, 642 bool force, struct iwl_mvm_txq *txq) 643 { 644 struct iwl_scd_txq_cfg_cmd cmd = { 645 .scd_queue = queue, 646 .action = SCD_CFG_DISABLE_QUEUE, 647 }; 648 bool shared_queue; 649 int ret; 650 651 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 652 return -EINVAL; 653 654 /* 655 * If the AC is lower than current one - FIFO needs to be redirected to 656 * the lowest one of the streams in the queue. Check if this is needed 657 * here. 658 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 659 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 660 * we need to check if the numerical value of X is LARGER than of Y. 661 */ 662 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 663 IWL_DEBUG_TX_QUEUES(mvm, 664 "No redirection needed on TXQ #%d\n", 665 queue); 666 return 0; 667 } 668 669 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 670 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 671 cmd.tid = mvm->queue_info[queue].txq_tid; 672 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 673 674 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 675 queue, iwl_mvm_ac_to_tx_fifo[ac]); 676 677 /* Stop the queue and wait for it to empty */ 678 txq->stopped = true; 679 680 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 681 if (ret) { 682 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 683 queue); 684 ret = -EIO; 685 goto out; 686 } 687 688 /* Before redirecting the queue we need to de-activate it */ 689 iwl_trans_txq_disable(mvm->trans, queue, false); 690 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 691 if (ret) 692 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 693 ret); 694 695 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 696 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 697 698 /* Update the TID "owner" of the queue */ 699 mvm->queue_info[queue].txq_tid = tid; 700 701 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 702 703 /* Redirect to lower AC */ 704 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 705 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 706 707 /* Update AC marking of the queue */ 708 mvm->queue_info[queue].mac80211_ac = ac; 709 710 /* 711 * Mark queue as shared in transport if shared 712 * Note this has to be done after queue enablement because enablement 713 * can also set this value, and there is no indication there to shared 714 * queues 715 */ 716 if (shared_queue) 717 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 718 719 out: 720 /* Continue using the queue */ 721 txq->stopped = false; 722 723 return ret; 724 } 725 726 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 727 u8 minq, u8 maxq) 728 { 729 int i; 730 731 lockdep_assert_held(&mvm->mutex); 732 733 /* This should not be hit with new TX path */ 734 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 735 return -ENOSPC; 736 737 /* Start by looking for a free queue */ 738 for (i = minq; i <= maxq; i++) 739 if (mvm->queue_info[i].tid_bitmap == 0 && 740 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 741 return i; 742 743 return -ENOSPC; 744 } 745 746 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 747 u8 sta_id, u8 tid, unsigned int timeout) 748 { 749 int queue, size = IWL_DEFAULT_QUEUE_SIZE; 750 751 if (tid == IWL_MAX_TID_COUNT) { 752 tid = IWL_MGMT_TID; 753 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 754 mvm->trans->cfg->min_txq_size); 755 } 756 queue = iwl_trans_txq_alloc(mvm->trans, 757 cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE), 758 sta_id, tid, SCD_QUEUE_CFG, size, timeout); 759 760 if (queue < 0) { 761 IWL_DEBUG_TX_QUEUES(mvm, 762 "Failed allocating TXQ for sta %d tid %d, ret: %d\n", 763 sta_id, tid, queue); 764 return queue; 765 } 766 767 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 768 queue, sta_id, tid); 769 770 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue); 771 772 return queue; 773 } 774 775 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 776 struct ieee80211_sta *sta, u8 ac, 777 int tid) 778 { 779 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 780 struct iwl_mvm_txq *mvmtxq = 781 iwl_mvm_txq_from_tid(sta, tid); 782 unsigned int wdg_timeout = 783 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 784 int queue = -1; 785 786 lockdep_assert_held(&mvm->mutex); 787 788 IWL_DEBUG_TX_QUEUES(mvm, 789 "Allocating queue for sta %d on tid %d\n", 790 mvmsta->sta_id, tid); 791 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 792 if (queue < 0) 793 return queue; 794 795 mvmtxq->txq_id = queue; 796 mvm->tvqm_info[queue].txq_tid = tid; 797 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 798 799 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 800 801 spin_lock_bh(&mvmsta->lock); 802 mvmsta->tid_data[tid].txq_id = queue; 803 spin_unlock_bh(&mvmsta->lock); 804 805 return 0; 806 } 807 808 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 809 struct ieee80211_sta *sta, 810 int queue, u8 sta_id, u8 tid) 811 { 812 bool enable_queue = true; 813 814 /* Make sure this TID isn't already enabled */ 815 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 816 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 817 queue, tid); 818 return false; 819 } 820 821 /* Update mappings and refcounts */ 822 if (mvm->queue_info[queue].tid_bitmap) 823 enable_queue = false; 824 825 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 826 mvm->queue_info[queue].ra_sta_id = sta_id; 827 828 if (enable_queue) { 829 if (tid != IWL_MAX_TID_COUNT) 830 mvm->queue_info[queue].mac80211_ac = 831 tid_to_mac80211_ac[tid]; 832 else 833 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 834 835 mvm->queue_info[queue].txq_tid = tid; 836 } 837 838 if (sta) { 839 struct iwl_mvm_txq *mvmtxq = 840 iwl_mvm_txq_from_tid(sta, tid); 841 842 mvmtxq->txq_id = queue; 843 } 844 845 IWL_DEBUG_TX_QUEUES(mvm, 846 "Enabling TXQ #%d tids=0x%x\n", 847 queue, mvm->queue_info[queue].tid_bitmap); 848 849 return enable_queue; 850 } 851 852 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 853 int queue, u16 ssn, 854 const struct iwl_trans_txq_scd_cfg *cfg, 855 unsigned int wdg_timeout) 856 { 857 struct iwl_scd_txq_cfg_cmd cmd = { 858 .scd_queue = queue, 859 .action = SCD_CFG_ENABLE_QUEUE, 860 .window = cfg->frame_limit, 861 .sta_id = cfg->sta_id, 862 .ssn = cpu_to_le16(ssn), 863 .tx_fifo = cfg->fifo, 864 .aggregate = cfg->aggregate, 865 .tid = cfg->tid, 866 }; 867 bool inc_ssn; 868 869 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 870 return false; 871 872 /* Send the enabling command if we need to */ 873 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 874 return false; 875 876 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 877 NULL, wdg_timeout); 878 if (inc_ssn) 879 le16_add_cpu(&cmd.ssn, 1); 880 881 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 882 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 883 884 return inc_ssn; 885 } 886 887 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 888 { 889 struct iwl_scd_txq_cfg_cmd cmd = { 890 .scd_queue = queue, 891 .action = SCD_CFG_UPDATE_QUEUE_TID, 892 }; 893 int tid; 894 unsigned long tid_bitmap; 895 int ret; 896 897 lockdep_assert_held(&mvm->mutex); 898 899 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 900 return; 901 902 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 903 904 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 905 return; 906 907 /* Find any TID for queue */ 908 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 909 cmd.tid = tid; 910 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 911 912 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 913 if (ret) { 914 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 915 queue, ret); 916 return; 917 } 918 919 mvm->queue_info[queue].txq_tid = tid; 920 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 921 queue, tid); 922 } 923 924 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 925 { 926 struct ieee80211_sta *sta; 927 struct iwl_mvm_sta *mvmsta; 928 u8 sta_id; 929 int tid = -1; 930 unsigned long tid_bitmap; 931 unsigned int wdg_timeout; 932 int ssn; 933 int ret = true; 934 935 /* queue sharing is disabled on new TX path */ 936 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 937 return; 938 939 lockdep_assert_held(&mvm->mutex); 940 941 sta_id = mvm->queue_info[queue].ra_sta_id; 942 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 943 944 /* Find TID for queue, and make sure it is the only one on the queue */ 945 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 946 if (tid_bitmap != BIT(tid)) { 947 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 948 queue, tid_bitmap); 949 return; 950 } 951 952 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 953 tid); 954 955 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 956 lockdep_is_held(&mvm->mutex)); 957 958 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 959 return; 960 961 mvmsta = iwl_mvm_sta_from_mac80211(sta); 962 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 963 964 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 965 966 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 967 tid_to_mac80211_ac[tid], ssn, 968 wdg_timeout, true, 969 iwl_mvm_txq_from_tid(sta, tid)); 970 if (ret) { 971 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 972 return; 973 } 974 975 /* If aggs should be turned back on - do it */ 976 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 977 struct iwl_mvm_add_sta_cmd cmd = {0}; 978 979 mvmsta->tid_disable_agg &= ~BIT(tid); 980 981 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 982 cmd.sta_id = mvmsta->sta_id; 983 cmd.add_modify = STA_MODE_MODIFY; 984 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 985 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 986 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 987 988 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 989 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 990 if (!ret) { 991 IWL_DEBUG_TX_QUEUES(mvm, 992 "TXQ #%d is now aggregated again\n", 993 queue); 994 995 /* Mark queue intenally as aggregating again */ 996 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 997 } 998 } 999 1000 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1001 } 1002 1003 /* 1004 * Remove inactive TIDs of a given queue. 1005 * If all queue TIDs are inactive - mark the queue as inactive 1006 * If only some the queue TIDs are inactive - unmap them from the queue 1007 * 1008 * Returns %true if all TIDs were removed and the queue could be reused. 1009 */ 1010 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1011 struct iwl_mvm_sta *mvmsta, int queue, 1012 unsigned long tid_bitmap, 1013 unsigned long *unshare_queues, 1014 unsigned long *changetid_queues) 1015 { 1016 int tid; 1017 1018 lockdep_assert_held(&mvmsta->lock); 1019 lockdep_assert_held(&mvm->mutex); 1020 1021 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1022 return false; 1023 1024 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1025 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1026 /* If some TFDs are still queued - don't mark TID as inactive */ 1027 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1028 tid_bitmap &= ~BIT(tid); 1029 1030 /* Don't mark as inactive any TID that has an active BA */ 1031 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1032 tid_bitmap &= ~BIT(tid); 1033 } 1034 1035 /* If all TIDs in the queue are inactive - return it can be reused */ 1036 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1037 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1038 return true; 1039 } 1040 1041 /* 1042 * If we are here, this is a shared queue and not all TIDs timed-out. 1043 * Remove the ones that did. 1044 */ 1045 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1046 u16 tid_bitmap; 1047 1048 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1049 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1050 1051 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1052 1053 /* 1054 * We need to take into account a situation in which a TXQ was 1055 * allocated to TID x, and then turned shared by adding TIDs y 1056 * and z. If TID x becomes inactive and is removed from the TXQ, 1057 * ownership must be given to one of the remaining TIDs. 1058 * This is mainly because if TID x continues - a new queue can't 1059 * be allocated for it as long as it is an owner of another TXQ. 1060 * 1061 * Mark this queue in the right bitmap, we'll send the command 1062 * to the firmware later. 1063 */ 1064 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1065 set_bit(queue, changetid_queues); 1066 1067 IWL_DEBUG_TX_QUEUES(mvm, 1068 "Removing inactive TID %d from shared Q:%d\n", 1069 tid, queue); 1070 } 1071 1072 IWL_DEBUG_TX_QUEUES(mvm, 1073 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1074 mvm->queue_info[queue].tid_bitmap); 1075 1076 /* 1077 * There may be different TIDs with the same mac queues, so make 1078 * sure all TIDs have existing corresponding mac queues enabled 1079 */ 1080 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1081 1082 /* If the queue is marked as shared - "unshare" it */ 1083 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1084 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1085 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1086 queue); 1087 set_bit(queue, unshare_queues); 1088 } 1089 1090 return false; 1091 } 1092 1093 /* 1094 * Check for inactivity - this includes checking if any queue 1095 * can be unshared and finding one (and only one) that can be 1096 * reused. 1097 * This function is also invoked as a sort of clean-up task, 1098 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1099 * 1100 * Returns the queue number, or -ENOSPC. 1101 */ 1102 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1103 { 1104 unsigned long now = jiffies; 1105 unsigned long unshare_queues = 0; 1106 unsigned long changetid_queues = 0; 1107 int i, ret, free_queue = -ENOSPC; 1108 struct ieee80211_sta *queue_owner = NULL; 1109 1110 lockdep_assert_held(&mvm->mutex); 1111 1112 if (iwl_mvm_has_new_tx_api(mvm)) 1113 return -ENOSPC; 1114 1115 rcu_read_lock(); 1116 1117 /* we skip the CMD queue below by starting at 1 */ 1118 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1119 1120 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1121 struct ieee80211_sta *sta; 1122 struct iwl_mvm_sta *mvmsta; 1123 u8 sta_id; 1124 int tid; 1125 unsigned long inactive_tid_bitmap = 0; 1126 unsigned long queue_tid_bitmap; 1127 1128 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1129 if (!queue_tid_bitmap) 1130 continue; 1131 1132 /* If TXQ isn't in active use anyway - nothing to do here... */ 1133 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1134 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1135 continue; 1136 1137 /* Check to see if there are inactive TIDs on this queue */ 1138 for_each_set_bit(tid, &queue_tid_bitmap, 1139 IWL_MAX_TID_COUNT + 1) { 1140 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1141 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1142 continue; 1143 1144 inactive_tid_bitmap |= BIT(tid); 1145 } 1146 1147 /* If all TIDs are active - finish check on this queue */ 1148 if (!inactive_tid_bitmap) 1149 continue; 1150 1151 /* 1152 * If we are here - the queue hadn't been served recently and is 1153 * in use 1154 */ 1155 1156 sta_id = mvm->queue_info[i].ra_sta_id; 1157 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1158 1159 /* 1160 * If the STA doesn't exist anymore, it isn't an error. It could 1161 * be that it was removed since getting the queues, and in this 1162 * case it should've inactivated its queues anyway. 1163 */ 1164 if (IS_ERR_OR_NULL(sta)) 1165 continue; 1166 1167 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1168 1169 spin_lock_bh(&mvmsta->lock); 1170 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1171 inactive_tid_bitmap, 1172 &unshare_queues, 1173 &changetid_queues); 1174 if (ret >= 0 && free_queue < 0) { 1175 queue_owner = sta; 1176 free_queue = ret; 1177 } 1178 /* only unlock sta lock - we still need the queue info lock */ 1179 spin_unlock_bh(&mvmsta->lock); 1180 } 1181 1182 1183 /* Reconfigure queues requiring reconfiguation */ 1184 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1185 iwl_mvm_unshare_queue(mvm, i); 1186 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1187 iwl_mvm_change_queue_tid(mvm, i); 1188 1189 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1190 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1191 alloc_for_sta); 1192 if (ret) { 1193 rcu_read_unlock(); 1194 return ret; 1195 } 1196 } 1197 1198 rcu_read_unlock(); 1199 1200 return free_queue; 1201 } 1202 1203 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1204 struct ieee80211_sta *sta, u8 ac, int tid) 1205 { 1206 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1207 struct iwl_trans_txq_scd_cfg cfg = { 1208 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1209 .sta_id = mvmsta->sta_id, 1210 .tid = tid, 1211 .frame_limit = IWL_FRAME_LIMIT, 1212 }; 1213 unsigned int wdg_timeout = 1214 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1215 int queue = -1; 1216 unsigned long disable_agg_tids = 0; 1217 enum iwl_mvm_agg_state queue_state; 1218 bool shared_queue = false, inc_ssn; 1219 int ssn; 1220 unsigned long tfd_queue_mask; 1221 int ret; 1222 1223 lockdep_assert_held(&mvm->mutex); 1224 1225 if (iwl_mvm_has_new_tx_api(mvm)) 1226 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1227 1228 spin_lock_bh(&mvmsta->lock); 1229 tfd_queue_mask = mvmsta->tfd_queue_msk; 1230 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1231 spin_unlock_bh(&mvmsta->lock); 1232 1233 if (tid == IWL_MAX_TID_COUNT) { 1234 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1235 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1236 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1237 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1238 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1239 queue); 1240 1241 /* If no such queue is found, we'll use a DATA queue instead */ 1242 } 1243 1244 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1245 (mvm->queue_info[mvmsta->reserved_queue].status == 1246 IWL_MVM_QUEUE_RESERVED)) { 1247 queue = mvmsta->reserved_queue; 1248 mvm->queue_info[queue].reserved = true; 1249 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1250 } 1251 1252 if (queue < 0) 1253 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1254 IWL_MVM_DQA_MIN_DATA_QUEUE, 1255 IWL_MVM_DQA_MAX_DATA_QUEUE); 1256 if (queue < 0) { 1257 /* try harder - perhaps kill an inactive queue */ 1258 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1259 } 1260 1261 /* No free queue - we'll have to share */ 1262 if (queue <= 0) { 1263 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1264 if (queue > 0) { 1265 shared_queue = true; 1266 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1267 } 1268 } 1269 1270 /* 1271 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1272 * to make sure no one else takes it. 1273 * This will allow avoiding re-acquiring the lock at the end of the 1274 * configuration. On error we'll mark it back as free. 1275 */ 1276 if (queue > 0 && !shared_queue) 1277 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1278 1279 /* This shouldn't happen - out of queues */ 1280 if (WARN_ON(queue <= 0)) { 1281 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1282 tid, cfg.sta_id); 1283 return queue; 1284 } 1285 1286 /* 1287 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1288 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1289 * as aggregatable. 1290 * Mark all DATA queues as allowing to be aggregated at some point 1291 */ 1292 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1293 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1294 1295 IWL_DEBUG_TX_QUEUES(mvm, 1296 "Allocating %squeue #%d to sta %d on tid %d\n", 1297 shared_queue ? "shared " : "", queue, 1298 mvmsta->sta_id, tid); 1299 1300 if (shared_queue) { 1301 /* Disable any open aggs on this queue */ 1302 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1303 1304 if (disable_agg_tids) { 1305 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1306 queue); 1307 iwl_mvm_invalidate_sta_queue(mvm, queue, 1308 disable_agg_tids, false); 1309 } 1310 } 1311 1312 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1313 1314 /* 1315 * Mark queue as shared in transport if shared 1316 * Note this has to be done after queue enablement because enablement 1317 * can also set this value, and there is no indication there to shared 1318 * queues 1319 */ 1320 if (shared_queue) 1321 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1322 1323 spin_lock_bh(&mvmsta->lock); 1324 /* 1325 * This looks racy, but it is not. We have only one packet for 1326 * this ra/tid in our Tx path since we stop the Qdisc when we 1327 * need to allocate a new TFD queue. 1328 */ 1329 if (inc_ssn) { 1330 mvmsta->tid_data[tid].seq_number += 0x10; 1331 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1332 } 1333 mvmsta->tid_data[tid].txq_id = queue; 1334 mvmsta->tfd_queue_msk |= BIT(queue); 1335 queue_state = mvmsta->tid_data[tid].state; 1336 1337 if (mvmsta->reserved_queue == queue) 1338 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1339 spin_unlock_bh(&mvmsta->lock); 1340 1341 if (!shared_queue) { 1342 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1343 if (ret) 1344 goto out_err; 1345 1346 /* If we need to re-enable aggregations... */ 1347 if (queue_state == IWL_AGG_ON) { 1348 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1349 if (ret) 1350 goto out_err; 1351 } 1352 } else { 1353 /* Redirect queue, if needed */ 1354 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1355 wdg_timeout, false, 1356 iwl_mvm_txq_from_tid(sta, tid)); 1357 if (ret) 1358 goto out_err; 1359 } 1360 1361 return 0; 1362 1363 out_err: 1364 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1365 1366 return ret; 1367 } 1368 1369 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1370 { 1371 if (tid == IWL_MAX_TID_COUNT) 1372 return IEEE80211_AC_VO; /* MGMT */ 1373 1374 return tid_to_mac80211_ac[tid]; 1375 } 1376 1377 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1378 { 1379 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1380 add_stream_wk); 1381 1382 mutex_lock(&mvm->mutex); 1383 1384 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1385 1386 while (!list_empty(&mvm->add_stream_txqs)) { 1387 struct iwl_mvm_txq *mvmtxq; 1388 struct ieee80211_txq *txq; 1389 u8 tid; 1390 1391 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1392 struct iwl_mvm_txq, list); 1393 1394 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1395 drv_priv); 1396 tid = txq->tid; 1397 if (tid == IEEE80211_NUM_TIDS) 1398 tid = IWL_MAX_TID_COUNT; 1399 1400 iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid); 1401 list_del_init(&mvmtxq->list); 1402 local_bh_disable(); 1403 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1404 local_bh_enable(); 1405 } 1406 1407 mutex_unlock(&mvm->mutex); 1408 } 1409 1410 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1411 struct ieee80211_sta *sta, 1412 enum nl80211_iftype vif_type) 1413 { 1414 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1415 int queue; 1416 1417 /* queue reserving is disabled on new TX path */ 1418 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1419 return 0; 1420 1421 /* run the general cleanup/unsharing of queues */ 1422 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1423 1424 /* Make sure we have free resources for this STA */ 1425 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1426 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1427 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1428 IWL_MVM_QUEUE_FREE)) 1429 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1430 else 1431 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1432 IWL_MVM_DQA_MIN_DATA_QUEUE, 1433 IWL_MVM_DQA_MAX_DATA_QUEUE); 1434 if (queue < 0) { 1435 /* try again - this time kick out a queue if needed */ 1436 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1437 if (queue < 0) { 1438 IWL_ERR(mvm, "No available queues for new station\n"); 1439 return -ENOSPC; 1440 } 1441 } 1442 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1443 1444 mvmsta->reserved_queue = queue; 1445 1446 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1447 queue, mvmsta->sta_id); 1448 1449 return 0; 1450 } 1451 1452 /* 1453 * In DQA mode, after a HW restart the queues should be allocated as before, in 1454 * order to avoid race conditions when there are shared queues. This function 1455 * does the re-mapping and queue allocation. 1456 * 1457 * Note that re-enabling aggregations isn't done in this function. 1458 */ 1459 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1460 struct ieee80211_sta *sta) 1461 { 1462 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1463 unsigned int wdg = 1464 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1465 int i; 1466 struct iwl_trans_txq_scd_cfg cfg = { 1467 .sta_id = mvm_sta->sta_id, 1468 .frame_limit = IWL_FRAME_LIMIT, 1469 }; 1470 1471 /* Make sure reserved queue is still marked as such (if allocated) */ 1472 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1473 mvm->queue_info[mvm_sta->reserved_queue].status = 1474 IWL_MVM_QUEUE_RESERVED; 1475 1476 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1477 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1478 int txq_id = tid_data->txq_id; 1479 int ac; 1480 1481 if (txq_id == IWL_MVM_INVALID_QUEUE) 1482 continue; 1483 1484 ac = tid_to_mac80211_ac[i]; 1485 1486 if (iwl_mvm_has_new_tx_api(mvm)) { 1487 IWL_DEBUG_TX_QUEUES(mvm, 1488 "Re-mapping sta %d tid %d\n", 1489 mvm_sta->sta_id, i); 1490 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1491 i, wdg); 1492 tid_data->txq_id = txq_id; 1493 1494 /* 1495 * Since we don't set the seq number after reset, and HW 1496 * sets it now, FW reset will cause the seq num to start 1497 * at 0 again, so driver will need to update it 1498 * internally as well, so it keeps in sync with real val 1499 */ 1500 tid_data->seq_number = 0; 1501 } else { 1502 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1503 1504 cfg.tid = i; 1505 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1506 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1507 txq_id == 1508 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1509 1510 IWL_DEBUG_TX_QUEUES(mvm, 1511 "Re-mapping sta %d tid %d to queue %d\n", 1512 mvm_sta->sta_id, i, txq_id); 1513 1514 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1515 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1516 } 1517 } 1518 } 1519 1520 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1521 struct iwl_mvm_int_sta *sta, 1522 const u8 *addr, 1523 u16 mac_id, u16 color) 1524 { 1525 struct iwl_mvm_add_sta_cmd cmd; 1526 int ret; 1527 u32 status = ADD_STA_SUCCESS; 1528 1529 lockdep_assert_held(&mvm->mutex); 1530 1531 memset(&cmd, 0, sizeof(cmd)); 1532 cmd.sta_id = sta->sta_id; 1533 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1534 color)); 1535 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1536 cmd.station_type = sta->type; 1537 1538 if (!iwl_mvm_has_new_tx_api(mvm)) 1539 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1540 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1541 1542 if (addr) 1543 memcpy(cmd.addr, addr, ETH_ALEN); 1544 1545 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1546 iwl_mvm_add_sta_cmd_size(mvm), 1547 &cmd, &status); 1548 if (ret) 1549 return ret; 1550 1551 switch (status & IWL_ADD_STA_STATUS_MASK) { 1552 case ADD_STA_SUCCESS: 1553 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1554 return 0; 1555 default: 1556 ret = -EIO; 1557 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1558 status); 1559 break; 1560 } 1561 return ret; 1562 } 1563 1564 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1565 struct ieee80211_vif *vif, 1566 struct ieee80211_sta *sta) 1567 { 1568 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1569 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1570 struct iwl_mvm_rxq_dup_data *dup_data; 1571 int i, ret, sta_id; 1572 bool sta_update = false; 1573 unsigned int sta_flags = 0; 1574 1575 lockdep_assert_held(&mvm->mutex); 1576 1577 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1578 sta_id = iwl_mvm_find_free_sta_id(mvm, 1579 ieee80211_vif_type_p2p(vif)); 1580 else 1581 sta_id = mvm_sta->sta_id; 1582 1583 if (sta_id == IWL_MVM_INVALID_STA) 1584 return -ENOSPC; 1585 1586 spin_lock_init(&mvm_sta->lock); 1587 1588 /* if this is a HW restart re-alloc existing queues */ 1589 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1590 struct iwl_mvm_int_sta tmp_sta = { 1591 .sta_id = sta_id, 1592 .type = mvm_sta->sta_type, 1593 }; 1594 1595 /* 1596 * First add an empty station since allocating 1597 * a queue requires a valid station 1598 */ 1599 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1600 mvmvif->id, mvmvif->color); 1601 if (ret) 1602 goto err; 1603 1604 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1605 sta_update = true; 1606 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1607 goto update_fw; 1608 } 1609 1610 mvm_sta->sta_id = sta_id; 1611 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1612 mvmvif->color); 1613 mvm_sta->vif = vif; 1614 if (!mvm->trans->cfg->gen2) 1615 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1616 else 1617 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1618 mvm_sta->tx_protection = 0; 1619 mvm_sta->tt_tx_protection = false; 1620 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1621 1622 /* HW restart, don't assume the memory has been zeroed */ 1623 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1624 mvm_sta->tfd_queue_msk = 0; 1625 1626 /* for HW restart - reset everything but the sequence number */ 1627 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1628 u16 seq = mvm_sta->tid_data[i].seq_number; 1629 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1630 mvm_sta->tid_data[i].seq_number = seq; 1631 1632 /* 1633 * Mark all queues for this STA as unallocated and defer TX 1634 * frames until the queue is allocated 1635 */ 1636 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1637 } 1638 1639 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1640 struct iwl_mvm_txq *mvmtxq = 1641 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1642 1643 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1644 INIT_LIST_HEAD(&mvmtxq->list); 1645 atomic_set(&mvmtxq->tx_request, 0); 1646 } 1647 1648 mvm_sta->agg_tids = 0; 1649 1650 if (iwl_mvm_has_new_rx_api(mvm) && 1651 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1652 int q; 1653 1654 dup_data = kcalloc(mvm->trans->num_rx_queues, 1655 sizeof(*dup_data), GFP_KERNEL); 1656 if (!dup_data) 1657 return -ENOMEM; 1658 /* 1659 * Initialize all the last_seq values to 0xffff which can never 1660 * compare equal to the frame's seq_ctrl in the check in 1661 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1662 * number and fragmented packets don't reach that function. 1663 * 1664 * This thus allows receiving a packet with seqno 0 and the 1665 * retry bit set as the very first packet on a new TID. 1666 */ 1667 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1668 memset(dup_data[q].last_seq, 0xff, 1669 sizeof(dup_data[q].last_seq)); 1670 mvm_sta->dup_data = dup_data; 1671 } 1672 1673 if (!iwl_mvm_has_new_tx_api(mvm)) { 1674 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1675 ieee80211_vif_type_p2p(vif)); 1676 if (ret) 1677 goto err; 1678 } 1679 1680 /* 1681 * if rs is registered with mac80211, then "add station" will be handled 1682 * via the corresponding ops, otherwise need to notify rate scaling here 1683 */ 1684 if (iwl_mvm_has_tlc_offload(mvm)) 1685 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1686 1687 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1688 1689 update_fw: 1690 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1691 if (ret) 1692 goto err; 1693 1694 if (vif->type == NL80211_IFTYPE_STATION) { 1695 if (!sta->tdls) { 1696 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1697 mvmvif->ap_sta_id = sta_id; 1698 } else { 1699 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1700 } 1701 } 1702 1703 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1704 1705 return 0; 1706 1707 err: 1708 return ret; 1709 } 1710 1711 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1712 bool drain) 1713 { 1714 struct iwl_mvm_add_sta_cmd cmd = {}; 1715 int ret; 1716 u32 status; 1717 1718 lockdep_assert_held(&mvm->mutex); 1719 1720 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1721 cmd.sta_id = mvmsta->sta_id; 1722 cmd.add_modify = STA_MODE_MODIFY; 1723 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1724 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1725 1726 status = ADD_STA_SUCCESS; 1727 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1728 iwl_mvm_add_sta_cmd_size(mvm), 1729 &cmd, &status); 1730 if (ret) 1731 return ret; 1732 1733 switch (status & IWL_ADD_STA_STATUS_MASK) { 1734 case ADD_STA_SUCCESS: 1735 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1736 mvmsta->sta_id); 1737 break; 1738 default: 1739 ret = -EIO; 1740 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1741 mvmsta->sta_id); 1742 break; 1743 } 1744 1745 return ret; 1746 } 1747 1748 /* 1749 * Remove a station from the FW table. Before sending the command to remove 1750 * the station validate that the station is indeed known to the driver (sanity 1751 * only). 1752 */ 1753 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1754 { 1755 struct ieee80211_sta *sta; 1756 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1757 .sta_id = sta_id, 1758 }; 1759 int ret; 1760 1761 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1762 lockdep_is_held(&mvm->mutex)); 1763 1764 /* Note: internal stations are marked as error values */ 1765 if (!sta) { 1766 IWL_ERR(mvm, "Invalid station id\n"); 1767 return -EINVAL; 1768 } 1769 1770 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1771 sizeof(rm_sta_cmd), &rm_sta_cmd); 1772 if (ret) { 1773 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1774 return ret; 1775 } 1776 1777 return 0; 1778 } 1779 1780 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1781 struct ieee80211_vif *vif, 1782 struct ieee80211_sta *sta) 1783 { 1784 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1785 int i; 1786 1787 lockdep_assert_held(&mvm->mutex); 1788 1789 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1790 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1791 continue; 1792 1793 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1794 0); 1795 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1796 } 1797 1798 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1799 struct iwl_mvm_txq *mvmtxq = 1800 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1801 1802 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1803 } 1804 } 1805 1806 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1807 struct iwl_mvm_sta *mvm_sta) 1808 { 1809 int i; 1810 1811 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1812 u16 txq_id; 1813 int ret; 1814 1815 spin_lock_bh(&mvm_sta->lock); 1816 txq_id = mvm_sta->tid_data[i].txq_id; 1817 spin_unlock_bh(&mvm_sta->lock); 1818 1819 if (txq_id == IWL_MVM_INVALID_QUEUE) 1820 continue; 1821 1822 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1823 if (ret) 1824 return ret; 1825 } 1826 1827 return 0; 1828 } 1829 1830 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1831 struct ieee80211_vif *vif, 1832 struct ieee80211_sta *sta) 1833 { 1834 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1835 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1836 u8 sta_id = mvm_sta->sta_id; 1837 int ret; 1838 1839 lockdep_assert_held(&mvm->mutex); 1840 1841 if (iwl_mvm_has_new_rx_api(mvm)) 1842 kfree(mvm_sta->dup_data); 1843 1844 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1845 if (ret) 1846 return ret; 1847 1848 /* flush its queues here since we are freeing mvm_sta */ 1849 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1850 if (ret) 1851 return ret; 1852 if (iwl_mvm_has_new_tx_api(mvm)) { 1853 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1854 } else { 1855 u32 q_mask = mvm_sta->tfd_queue_msk; 1856 1857 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1858 q_mask); 1859 } 1860 if (ret) 1861 return ret; 1862 1863 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1864 1865 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1866 1867 /* If there is a TXQ still marked as reserved - free it */ 1868 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1869 u8 reserved_txq = mvm_sta->reserved_queue; 1870 enum iwl_mvm_queue_status *status; 1871 1872 /* 1873 * If no traffic has gone through the reserved TXQ - it 1874 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1875 * should be manually marked as free again 1876 */ 1877 status = &mvm->queue_info[reserved_txq].status; 1878 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1879 (*status != IWL_MVM_QUEUE_FREE), 1880 "sta_id %d reserved txq %d status %d", 1881 sta_id, reserved_txq, *status)) 1882 return -EINVAL; 1883 1884 *status = IWL_MVM_QUEUE_FREE; 1885 } 1886 1887 if (vif->type == NL80211_IFTYPE_STATION && 1888 mvmvif->ap_sta_id == sta_id) { 1889 /* if associated - we can't remove the AP STA now */ 1890 if (vif->bss_conf.assoc) 1891 return ret; 1892 1893 /* unassoc - go ahead - remove the AP STA now */ 1894 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1895 1896 /* clear d0i3_ap_sta_id if no longer relevant */ 1897 if (mvm->d0i3_ap_sta_id == sta_id) 1898 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1899 } 1900 1901 /* 1902 * This shouldn't happen - the TDLS channel switch should be canceled 1903 * before the STA is removed. 1904 */ 1905 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1906 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1907 cancel_delayed_work(&mvm->tdls_cs.dwork); 1908 } 1909 1910 /* 1911 * Make sure that the tx response code sees the station as -EBUSY and 1912 * calls the drain worker. 1913 */ 1914 spin_lock_bh(&mvm_sta->lock); 1915 spin_unlock_bh(&mvm_sta->lock); 1916 1917 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1918 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1919 1920 return ret; 1921 } 1922 1923 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1924 struct ieee80211_vif *vif, 1925 u8 sta_id) 1926 { 1927 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1928 1929 lockdep_assert_held(&mvm->mutex); 1930 1931 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1932 return ret; 1933 } 1934 1935 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1936 struct iwl_mvm_int_sta *sta, 1937 u32 qmask, enum nl80211_iftype iftype, 1938 enum iwl_sta_type type) 1939 { 1940 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1941 sta->sta_id == IWL_MVM_INVALID_STA) { 1942 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1943 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1944 return -ENOSPC; 1945 } 1946 1947 sta->tfd_queue_msk = qmask; 1948 sta->type = type; 1949 1950 /* put a non-NULL value so iterating over the stations won't stop */ 1951 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1952 return 0; 1953 } 1954 1955 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1956 { 1957 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1958 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1959 sta->sta_id = IWL_MVM_INVALID_STA; 1960 } 1961 1962 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1963 u8 sta_id, u8 fifo) 1964 { 1965 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1966 mvm->cfg->base_params->wd_timeout : 1967 IWL_WATCHDOG_DISABLED; 1968 1969 if (iwl_mvm_has_new_tx_api(mvm)) { 1970 int tvqm_queue = 1971 iwl_mvm_tvqm_enable_txq(mvm, sta_id, 1972 IWL_MAX_TID_COUNT, 1973 wdg_timeout); 1974 *queue = tvqm_queue; 1975 } else { 1976 struct iwl_trans_txq_scd_cfg cfg = { 1977 .fifo = fifo, 1978 .sta_id = sta_id, 1979 .tid = IWL_MAX_TID_COUNT, 1980 .aggregate = false, 1981 .frame_limit = IWL_FRAME_LIMIT, 1982 }; 1983 1984 iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout); 1985 } 1986 } 1987 1988 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1989 { 1990 int ret; 1991 1992 lockdep_assert_held(&mvm->mutex); 1993 1994 /* Allocate aux station and assign to it the aux queue */ 1995 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1996 NL80211_IFTYPE_UNSPECIFIED, 1997 IWL_STA_AUX_ACTIVITY); 1998 if (ret) 1999 return ret; 2000 2001 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 2002 if (!iwl_mvm_has_new_tx_api(mvm)) 2003 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2004 mvm->aux_sta.sta_id, 2005 IWL_MVM_TX_FIFO_MCAST); 2006 2007 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 2008 MAC_INDEX_AUX, 0); 2009 if (ret) { 2010 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2011 return ret; 2012 } 2013 2014 /* 2015 * For 22000 firmware and on we cannot add queue to a station unknown 2016 * to firmware so enable queue here - after the station was added 2017 */ 2018 if (iwl_mvm_has_new_tx_api(mvm)) 2019 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2020 mvm->aux_sta.sta_id, 2021 IWL_MVM_TX_FIFO_MCAST); 2022 2023 return 0; 2024 } 2025 2026 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2027 { 2028 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2029 int ret; 2030 2031 lockdep_assert_held(&mvm->mutex); 2032 2033 /* Map snif queue to fifo - must happen before adding snif station */ 2034 if (!iwl_mvm_has_new_tx_api(mvm)) 2035 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2036 mvm->snif_sta.sta_id, 2037 IWL_MVM_TX_FIFO_BE); 2038 2039 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 2040 mvmvif->id, 0); 2041 if (ret) 2042 return ret; 2043 2044 /* 2045 * For 22000 firmware and on we cannot add queue to a station unknown 2046 * to firmware so enable queue here - after the station was added 2047 */ 2048 if (iwl_mvm_has_new_tx_api(mvm)) 2049 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2050 mvm->snif_sta.sta_id, 2051 IWL_MVM_TX_FIFO_BE); 2052 2053 return 0; 2054 } 2055 2056 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2057 { 2058 int ret; 2059 2060 lockdep_assert_held(&mvm->mutex); 2061 2062 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2063 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2064 if (ret) 2065 IWL_WARN(mvm, "Failed sending remove station\n"); 2066 2067 return ret; 2068 } 2069 2070 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2071 { 2072 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2073 } 2074 2075 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 2076 { 2077 lockdep_assert_held(&mvm->mutex); 2078 2079 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2080 } 2081 2082 /* 2083 * Send the add station command for the vif's broadcast station. 2084 * Assumes that the station was already allocated. 2085 * 2086 * @mvm: the mvm component 2087 * @vif: the interface to which the broadcast station is added 2088 * @bsta: the broadcast station to add. 2089 */ 2090 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2091 { 2092 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2093 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2094 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2095 const u8 *baddr = _baddr; 2096 int queue; 2097 int ret; 2098 unsigned int wdg_timeout = 2099 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2100 struct iwl_trans_txq_scd_cfg cfg = { 2101 .fifo = IWL_MVM_TX_FIFO_VO, 2102 .sta_id = mvmvif->bcast_sta.sta_id, 2103 .tid = IWL_MAX_TID_COUNT, 2104 .aggregate = false, 2105 .frame_limit = IWL_FRAME_LIMIT, 2106 }; 2107 2108 lockdep_assert_held(&mvm->mutex); 2109 2110 if (!iwl_mvm_has_new_tx_api(mvm)) { 2111 if (vif->type == NL80211_IFTYPE_AP || 2112 vif->type == NL80211_IFTYPE_ADHOC) 2113 queue = mvm->probe_queue; 2114 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2115 queue = mvm->p2p_dev_queue; 2116 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 2117 return -EINVAL; 2118 2119 bsta->tfd_queue_msk |= BIT(queue); 2120 2121 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2122 } 2123 2124 if (vif->type == NL80211_IFTYPE_ADHOC) 2125 baddr = vif->bss_conf.bssid; 2126 2127 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2128 return -ENOSPC; 2129 2130 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2131 mvmvif->id, mvmvif->color); 2132 if (ret) 2133 return ret; 2134 2135 /* 2136 * For 22000 firmware and on we cannot add queue to a station unknown 2137 * to firmware so enable queue here - after the station was added 2138 */ 2139 if (iwl_mvm_has_new_tx_api(mvm)) { 2140 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2141 IWL_MAX_TID_COUNT, 2142 wdg_timeout); 2143 2144 if (vif->type == NL80211_IFTYPE_AP || 2145 vif->type == NL80211_IFTYPE_ADHOC) 2146 mvm->probe_queue = queue; 2147 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2148 mvm->p2p_dev_queue = queue; 2149 } 2150 2151 return 0; 2152 } 2153 2154 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2155 struct ieee80211_vif *vif) 2156 { 2157 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2158 int queue; 2159 2160 lockdep_assert_held(&mvm->mutex); 2161 2162 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2163 2164 switch (vif->type) { 2165 case NL80211_IFTYPE_AP: 2166 case NL80211_IFTYPE_ADHOC: 2167 queue = mvm->probe_queue; 2168 break; 2169 case NL80211_IFTYPE_P2P_DEVICE: 2170 queue = mvm->p2p_dev_queue; 2171 break; 2172 default: 2173 WARN(1, "Can't free bcast queue on vif type %d\n", 2174 vif->type); 2175 return; 2176 } 2177 2178 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2179 if (iwl_mvm_has_new_tx_api(mvm)) 2180 return; 2181 2182 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2183 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2184 } 2185 2186 /* Send the FW a request to remove the station from it's internal data 2187 * structures, but DO NOT remove the entry from the local data structures. */ 2188 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2189 { 2190 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2191 int ret; 2192 2193 lockdep_assert_held(&mvm->mutex); 2194 2195 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2196 2197 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2198 if (ret) 2199 IWL_WARN(mvm, "Failed sending remove station\n"); 2200 return ret; 2201 } 2202 2203 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2204 { 2205 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2206 2207 lockdep_assert_held(&mvm->mutex); 2208 2209 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2210 ieee80211_vif_type_p2p(vif), 2211 IWL_STA_GENERAL_PURPOSE); 2212 } 2213 2214 /* Allocate a new station entry for the broadcast station to the given vif, 2215 * and send it to the FW. 2216 * Note that each P2P mac should have its own broadcast station. 2217 * 2218 * @mvm: the mvm component 2219 * @vif: the interface to which the broadcast station is added 2220 * @bsta: the broadcast station to add. */ 2221 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2222 { 2223 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2224 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2225 int ret; 2226 2227 lockdep_assert_held(&mvm->mutex); 2228 2229 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2230 if (ret) 2231 return ret; 2232 2233 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2234 2235 if (ret) 2236 iwl_mvm_dealloc_int_sta(mvm, bsta); 2237 2238 return ret; 2239 } 2240 2241 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2242 { 2243 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2244 2245 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2246 } 2247 2248 /* 2249 * Send the FW a request to remove the station from it's internal data 2250 * structures, and in addition remove it from the local data structure. 2251 */ 2252 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2253 { 2254 int ret; 2255 2256 lockdep_assert_held(&mvm->mutex); 2257 2258 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2259 2260 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2261 2262 return ret; 2263 } 2264 2265 /* 2266 * Allocate a new station entry for the multicast station to the given vif, 2267 * and send it to the FW. 2268 * Note that each AP/GO mac should have its own multicast station. 2269 * 2270 * @mvm: the mvm component 2271 * @vif: the interface to which the multicast station is added 2272 */ 2273 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2274 { 2275 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2276 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2277 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2278 const u8 *maddr = _maddr; 2279 struct iwl_trans_txq_scd_cfg cfg = { 2280 .fifo = IWL_MVM_TX_FIFO_MCAST, 2281 .sta_id = msta->sta_id, 2282 .tid = 0, 2283 .aggregate = false, 2284 .frame_limit = IWL_FRAME_LIMIT, 2285 }; 2286 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2287 int ret; 2288 2289 lockdep_assert_held(&mvm->mutex); 2290 2291 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2292 vif->type != NL80211_IFTYPE_ADHOC)) 2293 return -ENOTSUPP; 2294 2295 /* 2296 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2297 * invalid, so make sure we use the queue we want. 2298 * Note that this is done here as we want to avoid making DQA 2299 * changes in mac80211 layer. 2300 */ 2301 if (vif->type == NL80211_IFTYPE_ADHOC) 2302 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2303 2304 /* 2305 * While in previous FWs we had to exclude cab queue from TFD queue 2306 * mask, now it is needed as any other queue. 2307 */ 2308 if (!iwl_mvm_has_new_tx_api(mvm) && 2309 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2310 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2311 timeout); 2312 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2313 } 2314 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2315 mvmvif->id, mvmvif->color); 2316 if (ret) { 2317 iwl_mvm_dealloc_int_sta(mvm, msta); 2318 return ret; 2319 } 2320 2321 /* 2322 * Enable cab queue after the ADD_STA command is sent. 2323 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2324 * command with unknown station id, and for FW that doesn't support 2325 * station API since the cab queue is not included in the 2326 * tfd_queue_mask. 2327 */ 2328 if (iwl_mvm_has_new_tx_api(mvm)) { 2329 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2330 0, 2331 timeout); 2332 mvmvif->cab_queue = queue; 2333 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2334 IWL_UCODE_TLV_API_STA_TYPE)) 2335 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2336 timeout); 2337 2338 return 0; 2339 } 2340 2341 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2342 struct ieee80211_key_conf *keyconf, 2343 bool mcast) 2344 { 2345 union { 2346 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2347 struct iwl_mvm_add_sta_key_cmd cmd; 2348 } u = {}; 2349 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2350 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2351 __le16 key_flags; 2352 int ret, size; 2353 u32 status; 2354 2355 /* This is a valid situation for GTK removal */ 2356 if (sta_id == IWL_MVM_INVALID_STA) 2357 return 0; 2358 2359 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2360 STA_KEY_FLG_KEYID_MSK); 2361 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2362 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2363 2364 if (mcast) 2365 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2366 2367 /* 2368 * The fields assigned here are in the same location at the start 2369 * of the command, so we can do this union trick. 2370 */ 2371 u.cmd.common.key_flags = key_flags; 2372 u.cmd.common.key_offset = keyconf->hw_key_idx; 2373 u.cmd.common.sta_id = sta_id; 2374 2375 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2376 2377 status = ADD_STA_SUCCESS; 2378 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2379 &status); 2380 2381 switch (status) { 2382 case ADD_STA_SUCCESS: 2383 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2384 break; 2385 default: 2386 ret = -EIO; 2387 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2388 break; 2389 } 2390 2391 return ret; 2392 } 2393 2394 /* 2395 * Send the FW a request to remove the station from it's internal data 2396 * structures, and in addition remove it from the local data structure. 2397 */ 2398 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2399 { 2400 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2401 int ret; 2402 2403 lockdep_assert_held(&mvm->mutex); 2404 2405 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2406 2407 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2408 2409 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2410 if (ret) 2411 IWL_WARN(mvm, "Failed sending remove station\n"); 2412 2413 return ret; 2414 } 2415 2416 #define IWL_MAX_RX_BA_SESSIONS 16 2417 2418 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2419 { 2420 struct iwl_mvm_delba_notif notif = { 2421 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2422 .metadata.sync = 1, 2423 .delba.baid = baid, 2424 }; 2425 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2426 }; 2427 2428 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2429 struct iwl_mvm_baid_data *data) 2430 { 2431 int i; 2432 2433 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2434 2435 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2436 int j; 2437 struct iwl_mvm_reorder_buffer *reorder_buf = 2438 &data->reorder_buf[i]; 2439 struct iwl_mvm_reorder_buf_entry *entries = 2440 &data->entries[i * data->entries_per_queue]; 2441 2442 spin_lock_bh(&reorder_buf->lock); 2443 if (likely(!reorder_buf->num_stored)) { 2444 spin_unlock_bh(&reorder_buf->lock); 2445 continue; 2446 } 2447 2448 /* 2449 * This shouldn't happen in regular DELBA since the internal 2450 * delBA notification should trigger a release of all frames in 2451 * the reorder buffer. 2452 */ 2453 WARN_ON(1); 2454 2455 for (j = 0; j < reorder_buf->buf_size; j++) 2456 __skb_queue_purge(&entries[j].e.frames); 2457 /* 2458 * Prevent timer re-arm. This prevents a very far fetched case 2459 * where we timed out on the notification. There may be prior 2460 * RX frames pending in the RX queue before the notification 2461 * that might get processed between now and the actual deletion 2462 * and we would re-arm the timer although we are deleting the 2463 * reorder buffer. 2464 */ 2465 reorder_buf->removed = true; 2466 spin_unlock_bh(&reorder_buf->lock); 2467 del_timer_sync(&reorder_buf->reorder_timer); 2468 } 2469 } 2470 2471 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2472 struct iwl_mvm_baid_data *data, 2473 u16 ssn, u16 buf_size) 2474 { 2475 int i; 2476 2477 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2478 struct iwl_mvm_reorder_buffer *reorder_buf = 2479 &data->reorder_buf[i]; 2480 struct iwl_mvm_reorder_buf_entry *entries = 2481 &data->entries[i * data->entries_per_queue]; 2482 int j; 2483 2484 reorder_buf->num_stored = 0; 2485 reorder_buf->head_sn = ssn; 2486 reorder_buf->buf_size = buf_size; 2487 /* rx reorder timer */ 2488 timer_setup(&reorder_buf->reorder_timer, 2489 iwl_mvm_reorder_timer_expired, 0); 2490 spin_lock_init(&reorder_buf->lock); 2491 reorder_buf->mvm = mvm; 2492 reorder_buf->queue = i; 2493 reorder_buf->valid = false; 2494 for (j = 0; j < reorder_buf->buf_size; j++) 2495 __skb_queue_head_init(&entries[j].e.frames); 2496 } 2497 } 2498 2499 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2500 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2501 { 2502 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2503 struct iwl_mvm_add_sta_cmd cmd = {}; 2504 struct iwl_mvm_baid_data *baid_data = NULL; 2505 int ret; 2506 u32 status; 2507 2508 lockdep_assert_held(&mvm->mutex); 2509 2510 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2511 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2512 return -ENOSPC; 2513 } 2514 2515 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2516 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2517 2518 /* sparse doesn't like the __align() so don't check */ 2519 #ifndef __CHECKER__ 2520 /* 2521 * The division below will be OK if either the cache line size 2522 * can be divided by the entry size (ALIGN will round up) or if 2523 * if the entry size can be divided by the cache line size, in 2524 * which case the ALIGN() will do nothing. 2525 */ 2526 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2527 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2528 #endif 2529 2530 /* 2531 * Upward align the reorder buffer size to fill an entire cache 2532 * line for each queue, to avoid sharing cache lines between 2533 * different queues. 2534 */ 2535 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2536 2537 /* 2538 * Allocate here so if allocation fails we can bail out early 2539 * before starting the BA session in the firmware 2540 */ 2541 baid_data = kzalloc(sizeof(*baid_data) + 2542 mvm->trans->num_rx_queues * 2543 reorder_buf_size, 2544 GFP_KERNEL); 2545 if (!baid_data) 2546 return -ENOMEM; 2547 2548 /* 2549 * This division is why we need the above BUILD_BUG_ON(), 2550 * if that doesn't hold then this will not be right. 2551 */ 2552 baid_data->entries_per_queue = 2553 reorder_buf_size / sizeof(baid_data->entries[0]); 2554 } 2555 2556 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2557 cmd.sta_id = mvm_sta->sta_id; 2558 cmd.add_modify = STA_MODE_MODIFY; 2559 if (start) { 2560 cmd.add_immediate_ba_tid = (u8) tid; 2561 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2562 cmd.rx_ba_window = cpu_to_le16(buf_size); 2563 } else { 2564 cmd.remove_immediate_ba_tid = (u8) tid; 2565 } 2566 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2567 STA_MODIFY_REMOVE_BA_TID; 2568 2569 status = ADD_STA_SUCCESS; 2570 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2571 iwl_mvm_add_sta_cmd_size(mvm), 2572 &cmd, &status); 2573 if (ret) 2574 goto out_free; 2575 2576 switch (status & IWL_ADD_STA_STATUS_MASK) { 2577 case ADD_STA_SUCCESS: 2578 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2579 start ? "start" : "stopp"); 2580 break; 2581 case ADD_STA_IMMEDIATE_BA_FAILURE: 2582 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2583 ret = -ENOSPC; 2584 break; 2585 default: 2586 ret = -EIO; 2587 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2588 start ? "start" : "stopp", status); 2589 break; 2590 } 2591 2592 if (ret) 2593 goto out_free; 2594 2595 if (start) { 2596 u8 baid; 2597 2598 mvm->rx_ba_sessions++; 2599 2600 if (!iwl_mvm_has_new_rx_api(mvm)) 2601 return 0; 2602 2603 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2604 ret = -EINVAL; 2605 goto out_free; 2606 } 2607 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2608 IWL_ADD_STA_BAID_SHIFT); 2609 baid_data->baid = baid; 2610 baid_data->timeout = timeout; 2611 baid_data->last_rx = jiffies; 2612 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2613 timer_setup(&baid_data->session_timer, 2614 iwl_mvm_rx_agg_session_expired, 0); 2615 baid_data->mvm = mvm; 2616 baid_data->tid = tid; 2617 baid_data->sta_id = mvm_sta->sta_id; 2618 2619 mvm_sta->tid_to_baid[tid] = baid; 2620 if (timeout) 2621 mod_timer(&baid_data->session_timer, 2622 TU_TO_EXP_TIME(timeout * 2)); 2623 2624 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2625 /* 2626 * protect the BA data with RCU to cover a case where our 2627 * internal RX sync mechanism will timeout (not that it's 2628 * supposed to happen) and we will free the session data while 2629 * RX is being processed in parallel 2630 */ 2631 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2632 mvm_sta->sta_id, tid, baid); 2633 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2634 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2635 } else { 2636 u8 baid = mvm_sta->tid_to_baid[tid]; 2637 2638 if (mvm->rx_ba_sessions > 0) 2639 /* check that restart flow didn't zero the counter */ 2640 mvm->rx_ba_sessions--; 2641 if (!iwl_mvm_has_new_rx_api(mvm)) 2642 return 0; 2643 2644 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2645 return -EINVAL; 2646 2647 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2648 if (WARN_ON(!baid_data)) 2649 return -EINVAL; 2650 2651 /* synchronize all rx queues so we can safely delete */ 2652 iwl_mvm_free_reorder(mvm, baid_data); 2653 del_timer_sync(&baid_data->session_timer); 2654 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2655 kfree_rcu(baid_data, rcu_head); 2656 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2657 } 2658 return 0; 2659 2660 out_free: 2661 kfree(baid_data); 2662 return ret; 2663 } 2664 2665 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2666 int tid, u8 queue, bool start) 2667 { 2668 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2669 struct iwl_mvm_add_sta_cmd cmd = {}; 2670 int ret; 2671 u32 status; 2672 2673 lockdep_assert_held(&mvm->mutex); 2674 2675 if (start) { 2676 mvm_sta->tfd_queue_msk |= BIT(queue); 2677 mvm_sta->tid_disable_agg &= ~BIT(tid); 2678 } else { 2679 /* In DQA-mode the queue isn't removed on agg termination */ 2680 mvm_sta->tid_disable_agg |= BIT(tid); 2681 } 2682 2683 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2684 cmd.sta_id = mvm_sta->sta_id; 2685 cmd.add_modify = STA_MODE_MODIFY; 2686 if (!iwl_mvm_has_new_tx_api(mvm)) 2687 cmd.modify_mask = STA_MODIFY_QUEUES; 2688 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2689 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2690 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2691 2692 status = ADD_STA_SUCCESS; 2693 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2694 iwl_mvm_add_sta_cmd_size(mvm), 2695 &cmd, &status); 2696 if (ret) 2697 return ret; 2698 2699 switch (status & IWL_ADD_STA_STATUS_MASK) { 2700 case ADD_STA_SUCCESS: 2701 break; 2702 default: 2703 ret = -EIO; 2704 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2705 start ? "start" : "stopp", status); 2706 break; 2707 } 2708 2709 return ret; 2710 } 2711 2712 const u8 tid_to_mac80211_ac[] = { 2713 IEEE80211_AC_BE, 2714 IEEE80211_AC_BK, 2715 IEEE80211_AC_BK, 2716 IEEE80211_AC_BE, 2717 IEEE80211_AC_VI, 2718 IEEE80211_AC_VI, 2719 IEEE80211_AC_VO, 2720 IEEE80211_AC_VO, 2721 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2722 }; 2723 2724 static const u8 tid_to_ucode_ac[] = { 2725 AC_BE, 2726 AC_BK, 2727 AC_BK, 2728 AC_BE, 2729 AC_VI, 2730 AC_VI, 2731 AC_VO, 2732 AC_VO, 2733 }; 2734 2735 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2736 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2737 { 2738 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2739 struct iwl_mvm_tid_data *tid_data; 2740 u16 normalized_ssn; 2741 u16 txq_id; 2742 int ret; 2743 2744 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2745 return -EINVAL; 2746 2747 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2748 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2749 IWL_ERR(mvm, 2750 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2751 mvmsta->tid_data[tid].state); 2752 return -ENXIO; 2753 } 2754 2755 lockdep_assert_held(&mvm->mutex); 2756 2757 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2758 iwl_mvm_has_new_tx_api(mvm)) { 2759 u8 ac = tid_to_mac80211_ac[tid]; 2760 2761 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2762 if (ret) 2763 return ret; 2764 } 2765 2766 spin_lock_bh(&mvmsta->lock); 2767 2768 /* possible race condition - we entered D0i3 while starting agg */ 2769 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2770 spin_unlock_bh(&mvmsta->lock); 2771 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2772 return -EIO; 2773 } 2774 2775 /* 2776 * Note the possible cases: 2777 * 1. An enabled TXQ - TXQ needs to become agg'ed 2778 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2779 * it as reserved 2780 */ 2781 txq_id = mvmsta->tid_data[tid].txq_id; 2782 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2783 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2784 IWL_MVM_DQA_MIN_DATA_QUEUE, 2785 IWL_MVM_DQA_MAX_DATA_QUEUE); 2786 if (ret < 0) { 2787 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2788 goto out; 2789 } 2790 2791 txq_id = ret; 2792 2793 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2794 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2795 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2796 ret = -ENXIO; 2797 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2798 tid, IWL_MAX_HW_QUEUES - 1); 2799 goto out; 2800 2801 } else if (unlikely(mvm->queue_info[txq_id].status == 2802 IWL_MVM_QUEUE_SHARED)) { 2803 ret = -ENXIO; 2804 IWL_DEBUG_TX_QUEUES(mvm, 2805 "Can't start tid %d agg on shared queue!\n", 2806 tid); 2807 goto out; 2808 } 2809 2810 IWL_DEBUG_TX_QUEUES(mvm, 2811 "AGG for tid %d will be on queue #%d\n", 2812 tid, txq_id); 2813 2814 tid_data = &mvmsta->tid_data[tid]; 2815 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2816 tid_data->txq_id = txq_id; 2817 *ssn = tid_data->ssn; 2818 2819 IWL_DEBUG_TX_QUEUES(mvm, 2820 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2821 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2822 tid_data->next_reclaimed); 2823 2824 /* 2825 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2826 * to align the wrap around of ssn so we compare relevant values. 2827 */ 2828 normalized_ssn = tid_data->ssn; 2829 if (mvm->trans->cfg->gen2) 2830 normalized_ssn &= 0xff; 2831 2832 if (normalized_ssn == tid_data->next_reclaimed) { 2833 tid_data->state = IWL_AGG_STARTING; 2834 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2835 } else { 2836 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2837 } 2838 2839 ret = 0; 2840 2841 out: 2842 spin_unlock_bh(&mvmsta->lock); 2843 2844 return ret; 2845 } 2846 2847 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2848 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2849 bool amsdu) 2850 { 2851 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2852 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2853 unsigned int wdg_timeout = 2854 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2855 int queue, ret; 2856 bool alloc_queue = true; 2857 enum iwl_mvm_queue_status queue_status; 2858 u16 ssn; 2859 2860 struct iwl_trans_txq_scd_cfg cfg = { 2861 .sta_id = mvmsta->sta_id, 2862 .tid = tid, 2863 .frame_limit = buf_size, 2864 .aggregate = true, 2865 }; 2866 2867 /* 2868 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2869 * manager, so this function should never be called in this case. 2870 */ 2871 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2872 return -EINVAL; 2873 2874 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2875 != IWL_MAX_TID_COUNT); 2876 2877 spin_lock_bh(&mvmsta->lock); 2878 ssn = tid_data->ssn; 2879 queue = tid_data->txq_id; 2880 tid_data->state = IWL_AGG_ON; 2881 mvmsta->agg_tids |= BIT(tid); 2882 tid_data->ssn = 0xffff; 2883 tid_data->amsdu_in_ampdu_allowed = amsdu; 2884 spin_unlock_bh(&mvmsta->lock); 2885 2886 if (iwl_mvm_has_new_tx_api(mvm)) { 2887 /* 2888 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2889 * would have failed, so if we are here there is no need to 2890 * allocate a queue. 2891 * However, if aggregation size is different than the default 2892 * size, the scheduler should be reconfigured. 2893 * We cannot do this with the new TX API, so return unsupported 2894 * for now, until it will be offloaded to firmware.. 2895 * Note that if SCD default value changes - this condition 2896 * should be updated as well. 2897 */ 2898 if (buf_size < IWL_FRAME_LIMIT) 2899 return -ENOTSUPP; 2900 2901 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2902 if (ret) 2903 return -EIO; 2904 goto out; 2905 } 2906 2907 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2908 2909 queue_status = mvm->queue_info[queue].status; 2910 2911 /* Maybe there is no need to even alloc a queue... */ 2912 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2913 alloc_queue = false; 2914 2915 /* 2916 * Only reconfig the SCD for the queue if the window size has 2917 * changed from current (become smaller) 2918 */ 2919 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2920 /* 2921 * If reconfiguring an existing queue, it first must be 2922 * drained 2923 */ 2924 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2925 BIT(queue)); 2926 if (ret) { 2927 IWL_ERR(mvm, 2928 "Error draining queue before reconfig\n"); 2929 return ret; 2930 } 2931 2932 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2933 mvmsta->sta_id, tid, 2934 buf_size, ssn); 2935 if (ret) { 2936 IWL_ERR(mvm, 2937 "Error reconfiguring TXQ #%d\n", queue); 2938 return ret; 2939 } 2940 } 2941 2942 if (alloc_queue) 2943 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2944 &cfg, wdg_timeout); 2945 2946 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2947 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2948 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2949 if (ret) 2950 return -EIO; 2951 } 2952 2953 /* No need to mark as reserved */ 2954 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2955 2956 out: 2957 /* 2958 * Even though in theory the peer could have different 2959 * aggregation reorder buffer sizes for different sessions, 2960 * our ucode doesn't allow for that and has a global limit 2961 * for each station. Therefore, use the minimum of all the 2962 * aggregation sessions and our default value. 2963 */ 2964 mvmsta->max_agg_bufsize = 2965 min(mvmsta->max_agg_bufsize, buf_size); 2966 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2967 2968 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2969 sta->addr, tid); 2970 2971 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false); 2972 } 2973 2974 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2975 struct iwl_mvm_sta *mvmsta, 2976 struct iwl_mvm_tid_data *tid_data) 2977 { 2978 u16 txq_id = tid_data->txq_id; 2979 2980 lockdep_assert_held(&mvm->mutex); 2981 2982 if (iwl_mvm_has_new_tx_api(mvm)) 2983 return; 2984 2985 /* 2986 * The TXQ is marked as reserved only if no traffic came through yet 2987 * This means no traffic has been sent on this TID (agg'd or not), so 2988 * we no longer have use for the queue. Since it hasn't even been 2989 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2990 * free. 2991 */ 2992 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 2993 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2994 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 2995 } 2996 } 2997 2998 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2999 struct ieee80211_sta *sta, u16 tid) 3000 { 3001 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3002 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3003 u16 txq_id; 3004 int err; 3005 3006 /* 3007 * If mac80211 is cleaning its state, then say that we finished since 3008 * our state has been cleared anyway. 3009 */ 3010 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3011 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3012 return 0; 3013 } 3014 3015 spin_lock_bh(&mvmsta->lock); 3016 3017 txq_id = tid_data->txq_id; 3018 3019 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3020 mvmsta->sta_id, tid, txq_id, tid_data->state); 3021 3022 mvmsta->agg_tids &= ~BIT(tid); 3023 3024 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3025 3026 switch (tid_data->state) { 3027 case IWL_AGG_ON: 3028 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3029 3030 IWL_DEBUG_TX_QUEUES(mvm, 3031 "ssn = %d, next_recl = %d\n", 3032 tid_data->ssn, tid_data->next_reclaimed); 3033 3034 tid_data->ssn = 0xffff; 3035 tid_data->state = IWL_AGG_OFF; 3036 spin_unlock_bh(&mvmsta->lock); 3037 3038 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3039 3040 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3041 return 0; 3042 case IWL_AGG_STARTING: 3043 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3044 /* 3045 * The agg session has been stopped before it was set up. This 3046 * can happen when the AddBA timer times out for example. 3047 */ 3048 3049 /* No barriers since we are under mutex */ 3050 lockdep_assert_held(&mvm->mutex); 3051 3052 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3053 tid_data->state = IWL_AGG_OFF; 3054 err = 0; 3055 break; 3056 default: 3057 IWL_ERR(mvm, 3058 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3059 mvmsta->sta_id, tid, tid_data->state); 3060 IWL_ERR(mvm, 3061 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3062 err = -EINVAL; 3063 } 3064 3065 spin_unlock_bh(&mvmsta->lock); 3066 3067 return err; 3068 } 3069 3070 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3071 struct ieee80211_sta *sta, u16 tid) 3072 { 3073 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3074 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3075 u16 txq_id; 3076 enum iwl_mvm_agg_state old_state; 3077 3078 /* 3079 * First set the agg state to OFF to avoid calling 3080 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3081 */ 3082 spin_lock_bh(&mvmsta->lock); 3083 txq_id = tid_data->txq_id; 3084 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3085 mvmsta->sta_id, tid, txq_id, tid_data->state); 3086 old_state = tid_data->state; 3087 tid_data->state = IWL_AGG_OFF; 3088 mvmsta->agg_tids &= ~BIT(tid); 3089 spin_unlock_bh(&mvmsta->lock); 3090 3091 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3092 3093 if (old_state >= IWL_AGG_ON) { 3094 iwl_mvm_drain_sta(mvm, mvmsta, true); 3095 3096 if (iwl_mvm_has_new_tx_api(mvm)) { 3097 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3098 BIT(tid), 0)) 3099 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3100 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3101 } else { 3102 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3103 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3104 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3105 } 3106 3107 iwl_mvm_drain_sta(mvm, mvmsta, false); 3108 3109 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3110 } 3111 3112 return 0; 3113 } 3114 3115 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3116 { 3117 int i, max = -1, max_offs = -1; 3118 3119 lockdep_assert_held(&mvm->mutex); 3120 3121 /* Pick the unused key offset with the highest 'deleted' 3122 * counter. Every time a key is deleted, all the counters 3123 * are incremented and the one that was just deleted is 3124 * reset to zero. Thus, the highest counter is the one 3125 * that was deleted longest ago. Pick that one. 3126 */ 3127 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3128 if (test_bit(i, mvm->fw_key_table)) 3129 continue; 3130 if (mvm->fw_key_deleted[i] > max) { 3131 max = mvm->fw_key_deleted[i]; 3132 max_offs = i; 3133 } 3134 } 3135 3136 if (max_offs < 0) 3137 return STA_KEY_IDX_INVALID; 3138 3139 return max_offs; 3140 } 3141 3142 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3143 struct ieee80211_vif *vif, 3144 struct ieee80211_sta *sta) 3145 { 3146 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3147 3148 if (sta) 3149 return iwl_mvm_sta_from_mac80211(sta); 3150 3151 /* 3152 * The device expects GTKs for station interfaces to be 3153 * installed as GTKs for the AP station. If we have no 3154 * station ID, then use AP's station ID. 3155 */ 3156 if (vif->type == NL80211_IFTYPE_STATION && 3157 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3158 u8 sta_id = mvmvif->ap_sta_id; 3159 3160 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3161 lockdep_is_held(&mvm->mutex)); 3162 3163 /* 3164 * It is possible that the 'sta' parameter is NULL, 3165 * for example when a GTK is removed - the sta_id will then 3166 * be the AP ID, and no station was passed by mac80211. 3167 */ 3168 if (IS_ERR_OR_NULL(sta)) 3169 return NULL; 3170 3171 return iwl_mvm_sta_from_mac80211(sta); 3172 } 3173 3174 return NULL; 3175 } 3176 3177 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3178 u32 sta_id, 3179 struct ieee80211_key_conf *key, bool mcast, 3180 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3181 u8 key_offset, bool mfp) 3182 { 3183 union { 3184 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3185 struct iwl_mvm_add_sta_key_cmd cmd; 3186 } u = {}; 3187 __le16 key_flags; 3188 int ret; 3189 u32 status; 3190 u16 keyidx; 3191 u64 pn = 0; 3192 int i, size; 3193 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3194 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3195 3196 if (sta_id == IWL_MVM_INVALID_STA) 3197 return -EINVAL; 3198 3199 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3200 STA_KEY_FLG_KEYID_MSK; 3201 key_flags = cpu_to_le16(keyidx); 3202 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3203 3204 switch (key->cipher) { 3205 case WLAN_CIPHER_SUITE_TKIP: 3206 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3207 if (new_api) { 3208 memcpy((void *)&u.cmd.tx_mic_key, 3209 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3210 IWL_MIC_KEY_SIZE); 3211 3212 memcpy((void *)&u.cmd.rx_mic_key, 3213 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3214 IWL_MIC_KEY_SIZE); 3215 pn = atomic64_read(&key->tx_pn); 3216 3217 } else { 3218 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3219 for (i = 0; i < 5; i++) 3220 u.cmd_v1.tkip_rx_ttak[i] = 3221 cpu_to_le16(tkip_p1k[i]); 3222 } 3223 memcpy(u.cmd.common.key, key->key, key->keylen); 3224 break; 3225 case WLAN_CIPHER_SUITE_CCMP: 3226 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3227 memcpy(u.cmd.common.key, key->key, key->keylen); 3228 if (new_api) 3229 pn = atomic64_read(&key->tx_pn); 3230 break; 3231 case WLAN_CIPHER_SUITE_WEP104: 3232 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3233 /* fall through */ 3234 case WLAN_CIPHER_SUITE_WEP40: 3235 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3236 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3237 break; 3238 case WLAN_CIPHER_SUITE_GCMP_256: 3239 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3240 /* fall through */ 3241 case WLAN_CIPHER_SUITE_GCMP: 3242 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3243 memcpy(u.cmd.common.key, key->key, key->keylen); 3244 if (new_api) 3245 pn = atomic64_read(&key->tx_pn); 3246 break; 3247 default: 3248 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3249 memcpy(u.cmd.common.key, key->key, key->keylen); 3250 } 3251 3252 if (mcast) 3253 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3254 if (mfp) 3255 key_flags |= cpu_to_le16(STA_KEY_MFP); 3256 3257 u.cmd.common.key_offset = key_offset; 3258 u.cmd.common.key_flags = key_flags; 3259 u.cmd.common.sta_id = sta_id; 3260 3261 if (new_api) { 3262 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3263 size = sizeof(u.cmd); 3264 } else { 3265 size = sizeof(u.cmd_v1); 3266 } 3267 3268 status = ADD_STA_SUCCESS; 3269 if (cmd_flags & CMD_ASYNC) 3270 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3271 &u.cmd); 3272 else 3273 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3274 &u.cmd, &status); 3275 3276 switch (status) { 3277 case ADD_STA_SUCCESS: 3278 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3279 break; 3280 default: 3281 ret = -EIO; 3282 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3283 break; 3284 } 3285 3286 return ret; 3287 } 3288 3289 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3290 struct ieee80211_key_conf *keyconf, 3291 u8 sta_id, bool remove_key) 3292 { 3293 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3294 3295 /* verify the key details match the required command's expectations */ 3296 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3297 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3298 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3299 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3300 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3301 return -EINVAL; 3302 3303 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3304 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3305 return -EINVAL; 3306 3307 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3308 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3309 3310 if (remove_key) { 3311 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3312 } else { 3313 struct ieee80211_key_seq seq; 3314 const u8 *pn; 3315 3316 switch (keyconf->cipher) { 3317 case WLAN_CIPHER_SUITE_AES_CMAC: 3318 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3319 break; 3320 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3321 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3322 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3323 break; 3324 default: 3325 return -EINVAL; 3326 } 3327 3328 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3329 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3330 igtk_cmd.ctrl_flags |= 3331 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3332 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3333 pn = seq.aes_cmac.pn; 3334 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3335 ((u64) pn[4] << 8) | 3336 ((u64) pn[3] << 16) | 3337 ((u64) pn[2] << 24) | 3338 ((u64) pn[1] << 32) | 3339 ((u64) pn[0] << 40)); 3340 } 3341 3342 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3343 remove_key ? "removing" : "installing", 3344 igtk_cmd.sta_id); 3345 3346 if (!iwl_mvm_has_new_rx_api(mvm)) { 3347 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3348 .ctrl_flags = igtk_cmd.ctrl_flags, 3349 .key_id = igtk_cmd.key_id, 3350 .sta_id = igtk_cmd.sta_id, 3351 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3352 }; 3353 3354 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3355 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3356 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3357 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3358 } 3359 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3360 sizeof(igtk_cmd), &igtk_cmd); 3361 } 3362 3363 3364 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3365 struct ieee80211_vif *vif, 3366 struct ieee80211_sta *sta) 3367 { 3368 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3369 3370 if (sta) 3371 return sta->addr; 3372 3373 if (vif->type == NL80211_IFTYPE_STATION && 3374 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3375 u8 sta_id = mvmvif->ap_sta_id; 3376 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3377 lockdep_is_held(&mvm->mutex)); 3378 return sta->addr; 3379 } 3380 3381 3382 return NULL; 3383 } 3384 3385 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3386 struct ieee80211_vif *vif, 3387 struct ieee80211_sta *sta, 3388 struct ieee80211_key_conf *keyconf, 3389 u8 key_offset, 3390 bool mcast) 3391 { 3392 int ret; 3393 const u8 *addr; 3394 struct ieee80211_key_seq seq; 3395 u16 p1k[5]; 3396 u32 sta_id; 3397 bool mfp = false; 3398 3399 if (sta) { 3400 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3401 3402 sta_id = mvm_sta->sta_id; 3403 mfp = sta->mfp; 3404 } else if (vif->type == NL80211_IFTYPE_AP && 3405 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3406 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3407 3408 sta_id = mvmvif->mcast_sta.sta_id; 3409 } else { 3410 IWL_ERR(mvm, "Failed to find station id\n"); 3411 return -EINVAL; 3412 } 3413 3414 switch (keyconf->cipher) { 3415 case WLAN_CIPHER_SUITE_TKIP: 3416 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3417 /* get phase 1 key from mac80211 */ 3418 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3419 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3420 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3421 seq.tkip.iv32, p1k, 0, key_offset, 3422 mfp); 3423 break; 3424 case WLAN_CIPHER_SUITE_CCMP: 3425 case WLAN_CIPHER_SUITE_WEP40: 3426 case WLAN_CIPHER_SUITE_WEP104: 3427 case WLAN_CIPHER_SUITE_GCMP: 3428 case WLAN_CIPHER_SUITE_GCMP_256: 3429 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3430 0, NULL, 0, key_offset, mfp); 3431 break; 3432 default: 3433 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3434 0, NULL, 0, key_offset, mfp); 3435 } 3436 3437 return ret; 3438 } 3439 3440 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3441 struct ieee80211_vif *vif, 3442 struct ieee80211_sta *sta, 3443 struct ieee80211_key_conf *keyconf, 3444 u8 key_offset) 3445 { 3446 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3447 struct iwl_mvm_sta *mvm_sta; 3448 u8 sta_id = IWL_MVM_INVALID_STA; 3449 int ret; 3450 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3451 3452 lockdep_assert_held(&mvm->mutex); 3453 3454 if (vif->type != NL80211_IFTYPE_AP || 3455 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3456 /* Get the station id from the mvm local station table */ 3457 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3458 if (!mvm_sta) { 3459 IWL_ERR(mvm, "Failed to find station\n"); 3460 return -EINVAL; 3461 } 3462 sta_id = mvm_sta->sta_id; 3463 3464 /* 3465 * It is possible that the 'sta' parameter is NULL, and thus 3466 * there is a need to retrieve the sta from the local station 3467 * table. 3468 */ 3469 if (!sta) { 3470 sta = rcu_dereference_protected( 3471 mvm->fw_id_to_mac_id[sta_id], 3472 lockdep_is_held(&mvm->mutex)); 3473 if (IS_ERR_OR_NULL(sta)) { 3474 IWL_ERR(mvm, "Invalid station id\n"); 3475 return -EINVAL; 3476 } 3477 } 3478 3479 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3480 return -EINVAL; 3481 } else { 3482 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3483 3484 sta_id = mvmvif->mcast_sta.sta_id; 3485 } 3486 3487 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3488 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3489 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3490 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3491 goto end; 3492 } 3493 3494 /* If the key_offset is not pre-assigned, we need to find a 3495 * new offset to use. In normal cases, the offset is not 3496 * pre-assigned, but during HW_RESTART we want to reuse the 3497 * same indices, so we pass them when this function is called. 3498 * 3499 * In D3 entry, we need to hardcoded the indices (because the 3500 * firmware hardcodes the PTK offset to 0). In this case, we 3501 * need to make sure we don't overwrite the hw_key_idx in the 3502 * keyconf structure, because otherwise we cannot configure 3503 * the original ones back when resuming. 3504 */ 3505 if (key_offset == STA_KEY_IDX_INVALID) { 3506 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3507 if (key_offset == STA_KEY_IDX_INVALID) 3508 return -ENOSPC; 3509 keyconf->hw_key_idx = key_offset; 3510 } 3511 3512 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3513 if (ret) 3514 goto end; 3515 3516 /* 3517 * For WEP, the same key is used for multicast and unicast. Upload it 3518 * again, using the same key offset, and now pointing the other one 3519 * to the same key slot (offset). 3520 * If this fails, remove the original as well. 3521 */ 3522 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3523 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3524 sta) { 3525 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3526 key_offset, !mcast); 3527 if (ret) { 3528 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3529 goto end; 3530 } 3531 } 3532 3533 __set_bit(key_offset, mvm->fw_key_table); 3534 3535 end: 3536 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3537 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3538 sta ? sta->addr : zero_addr, ret); 3539 return ret; 3540 } 3541 3542 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3543 struct ieee80211_vif *vif, 3544 struct ieee80211_sta *sta, 3545 struct ieee80211_key_conf *keyconf) 3546 { 3547 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3548 struct iwl_mvm_sta *mvm_sta; 3549 u8 sta_id = IWL_MVM_INVALID_STA; 3550 int ret, i; 3551 3552 lockdep_assert_held(&mvm->mutex); 3553 3554 /* Get the station from the mvm local station table */ 3555 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3556 if (mvm_sta) 3557 sta_id = mvm_sta->sta_id; 3558 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3559 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3560 3561 3562 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3563 keyconf->keyidx, sta_id); 3564 3565 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3566 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3567 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3568 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3569 3570 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3571 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3572 keyconf->hw_key_idx); 3573 return -ENOENT; 3574 } 3575 3576 /* track which key was deleted last */ 3577 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3578 if (mvm->fw_key_deleted[i] < U8_MAX) 3579 mvm->fw_key_deleted[i]++; 3580 } 3581 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3582 3583 if (sta && !mvm_sta) { 3584 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3585 return 0; 3586 } 3587 3588 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3589 if (ret) 3590 return ret; 3591 3592 /* delete WEP key twice to get rid of (now useless) offset */ 3593 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3594 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3595 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3596 3597 return ret; 3598 } 3599 3600 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3601 struct ieee80211_vif *vif, 3602 struct ieee80211_key_conf *keyconf, 3603 struct ieee80211_sta *sta, u32 iv32, 3604 u16 *phase1key) 3605 { 3606 struct iwl_mvm_sta *mvm_sta; 3607 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3608 bool mfp = sta ? sta->mfp : false; 3609 3610 rcu_read_lock(); 3611 3612 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3613 if (WARN_ON_ONCE(!mvm_sta)) 3614 goto unlock; 3615 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3616 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3617 mfp); 3618 3619 unlock: 3620 rcu_read_unlock(); 3621 } 3622 3623 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3624 struct ieee80211_sta *sta) 3625 { 3626 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3627 struct iwl_mvm_add_sta_cmd cmd = { 3628 .add_modify = STA_MODE_MODIFY, 3629 .sta_id = mvmsta->sta_id, 3630 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3631 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3632 }; 3633 int ret; 3634 3635 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3636 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3637 if (ret) 3638 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3639 } 3640 3641 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3642 struct ieee80211_sta *sta, 3643 enum ieee80211_frame_release_type reason, 3644 u16 cnt, u16 tids, bool more_data, 3645 bool single_sta_queue) 3646 { 3647 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3648 struct iwl_mvm_add_sta_cmd cmd = { 3649 .add_modify = STA_MODE_MODIFY, 3650 .sta_id = mvmsta->sta_id, 3651 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3652 .sleep_tx_count = cpu_to_le16(cnt), 3653 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3654 }; 3655 int tid, ret; 3656 unsigned long _tids = tids; 3657 3658 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3659 * Note that this field is reserved and unused by firmware not 3660 * supporting GO uAPSD, so it's safe to always do this. 3661 */ 3662 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3663 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3664 3665 /* If we're releasing frames from aggregation or dqa queues then check 3666 * if all the queues that we're releasing frames from, combined, have: 3667 * - more frames than the service period, in which case more_data 3668 * needs to be set 3669 * - fewer than 'cnt' frames, in which case we need to adjust the 3670 * firmware command (but do that unconditionally) 3671 */ 3672 if (single_sta_queue) { 3673 int remaining = cnt; 3674 int sleep_tx_count; 3675 3676 spin_lock_bh(&mvmsta->lock); 3677 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3678 struct iwl_mvm_tid_data *tid_data; 3679 u16 n_queued; 3680 3681 tid_data = &mvmsta->tid_data[tid]; 3682 3683 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3684 if (n_queued > remaining) { 3685 more_data = true; 3686 remaining = 0; 3687 break; 3688 } 3689 remaining -= n_queued; 3690 } 3691 sleep_tx_count = cnt - remaining; 3692 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3693 mvmsta->sleep_tx_count = sleep_tx_count; 3694 spin_unlock_bh(&mvmsta->lock); 3695 3696 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3697 if (WARN_ON(cnt - remaining == 0)) { 3698 ieee80211_sta_eosp(sta); 3699 return; 3700 } 3701 } 3702 3703 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3704 if (more_data) 3705 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3706 3707 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3708 mvmsta->next_status_eosp = true; 3709 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3710 } else { 3711 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3712 } 3713 3714 /* block the Tx queues until the FW updated the sleep Tx count */ 3715 iwl_trans_block_txq_ptrs(mvm->trans, true); 3716 3717 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3718 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3719 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3720 if (ret) 3721 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3722 } 3723 3724 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3725 struct iwl_rx_cmd_buffer *rxb) 3726 { 3727 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3728 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3729 struct ieee80211_sta *sta; 3730 u32 sta_id = le32_to_cpu(notif->sta_id); 3731 3732 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3733 return; 3734 3735 rcu_read_lock(); 3736 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3737 if (!IS_ERR_OR_NULL(sta)) 3738 ieee80211_sta_eosp(sta); 3739 rcu_read_unlock(); 3740 } 3741 3742 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3743 struct iwl_mvm_sta *mvmsta, bool disable) 3744 { 3745 struct iwl_mvm_add_sta_cmd cmd = { 3746 .add_modify = STA_MODE_MODIFY, 3747 .sta_id = mvmsta->sta_id, 3748 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3749 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3750 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3751 }; 3752 int ret; 3753 3754 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3755 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3756 if (ret) 3757 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3758 } 3759 3760 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3761 struct ieee80211_sta *sta, 3762 bool disable) 3763 { 3764 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3765 3766 spin_lock_bh(&mvm_sta->lock); 3767 3768 if (mvm_sta->disable_tx == disable) { 3769 spin_unlock_bh(&mvm_sta->lock); 3770 return; 3771 } 3772 3773 mvm_sta->disable_tx = disable; 3774 3775 /* Tell mac80211 to start/stop queuing tx for this station */ 3776 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3777 3778 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3779 3780 spin_unlock_bh(&mvm_sta->lock); 3781 } 3782 3783 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3784 struct iwl_mvm_vif *mvmvif, 3785 struct iwl_mvm_int_sta *sta, 3786 bool disable) 3787 { 3788 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3789 struct iwl_mvm_add_sta_cmd cmd = { 3790 .add_modify = STA_MODE_MODIFY, 3791 .sta_id = sta->sta_id, 3792 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3793 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3794 .mac_id_n_color = cpu_to_le32(id), 3795 }; 3796 int ret; 3797 3798 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3799 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3800 if (ret) 3801 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3802 } 3803 3804 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3805 struct iwl_mvm_vif *mvmvif, 3806 bool disable) 3807 { 3808 struct ieee80211_sta *sta; 3809 struct iwl_mvm_sta *mvm_sta; 3810 int i; 3811 3812 lockdep_assert_held(&mvm->mutex); 3813 3814 /* Block/unblock all the stations of the given mvmvif */ 3815 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3816 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3817 lockdep_is_held(&mvm->mutex)); 3818 if (IS_ERR_OR_NULL(sta)) 3819 continue; 3820 3821 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3822 if (mvm_sta->mac_id_n_color != 3823 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3824 continue; 3825 3826 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3827 } 3828 3829 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3830 return; 3831 3832 /* Need to block/unblock also multicast station */ 3833 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3834 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3835 &mvmvif->mcast_sta, disable); 3836 3837 /* 3838 * Only unblock the broadcast station (FW blocks it for immediate 3839 * quiet, not the driver) 3840 */ 3841 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3842 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3843 &mvmvif->bcast_sta, disable); 3844 } 3845 3846 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3847 { 3848 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3849 struct iwl_mvm_sta *mvmsta; 3850 3851 rcu_read_lock(); 3852 3853 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3854 3855 if (!WARN_ON(!mvmsta)) 3856 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3857 3858 rcu_read_unlock(); 3859 } 3860 3861 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3862 { 3863 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3864 3865 /* 3866 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3867 * to align the wrap around of ssn so we compare relevant values. 3868 */ 3869 if (mvm->trans->cfg->gen2) 3870 sn &= 0xff; 3871 3872 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3873 } 3874