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 /* 71 * New version of ADD_STA_sta command added new fields at the end of the 72 * structure, so sending the size of the relevant API's structure is enough to 73 * support both API versions. 74 */ 75 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 76 { 77 if (iwl_mvm_has_new_rx_api(mvm) || 78 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 79 return sizeof(struct iwl_mvm_add_sta_cmd); 80 else 81 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 82 } 83 84 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 85 enum nl80211_iftype iftype) 86 { 87 int sta_id; 88 u32 reserved_ids = 0; 89 90 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 91 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 92 93 lockdep_assert_held(&mvm->mutex); 94 95 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 96 if (iftype != NL80211_IFTYPE_STATION) 97 reserved_ids = BIT(0); 98 99 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 100 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 101 if (BIT(sta_id) & reserved_ids) 102 continue; 103 104 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 105 lockdep_is_held(&mvm->mutex))) 106 return sta_id; 107 } 108 return IWL_MVM_INVALID_STA; 109 } 110 111 /* send station add/update command to firmware */ 112 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 113 bool update, unsigned int flags) 114 { 115 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 116 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 117 .sta_id = mvm_sta->sta_id, 118 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 119 .add_modify = update ? 1 : 0, 120 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 121 STA_FLG_MIMO_EN_MSK | 122 STA_FLG_RTS_MIMO_PROT), 123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 124 }; 125 int ret; 126 u32 status; 127 u32 agg_size = 0, mpdu_dens = 0; 128 129 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 130 add_sta_cmd.station_type = mvm_sta->sta_type; 131 132 if (!update || (flags & STA_MODIFY_QUEUES)) { 133 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 134 135 if (!iwl_mvm_has_new_tx_api(mvm)) { 136 add_sta_cmd.tfd_queue_msk = 137 cpu_to_le32(mvm_sta->tfd_queue_msk); 138 139 if (flags & STA_MODIFY_QUEUES) 140 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 141 } else { 142 WARN_ON(flags & STA_MODIFY_QUEUES); 143 } 144 } 145 146 switch (sta->bandwidth) { 147 case IEEE80211_STA_RX_BW_160: 148 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 149 /* fall through */ 150 case IEEE80211_STA_RX_BW_80: 151 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 152 /* fall through */ 153 case IEEE80211_STA_RX_BW_40: 154 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 155 /* fall through */ 156 case IEEE80211_STA_RX_BW_20: 157 if (sta->ht_cap.ht_supported) 158 add_sta_cmd.station_flags |= 159 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 160 break; 161 } 162 163 switch (sta->rx_nss) { 164 case 1: 165 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 166 break; 167 case 2: 168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 169 break; 170 case 3 ... 8: 171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 172 break; 173 } 174 175 switch (sta->smps_mode) { 176 case IEEE80211_SMPS_AUTOMATIC: 177 case IEEE80211_SMPS_NUM_MODES: 178 WARN_ON(1); 179 break; 180 case IEEE80211_SMPS_STATIC: 181 /* override NSS */ 182 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 183 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 184 break; 185 case IEEE80211_SMPS_DYNAMIC: 186 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 187 break; 188 case IEEE80211_SMPS_OFF: 189 /* nothing */ 190 break; 191 } 192 193 if (sta->ht_cap.ht_supported) { 194 add_sta_cmd.station_flags_msk |= 195 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 196 STA_FLG_AGG_MPDU_DENS_MSK); 197 198 mpdu_dens = sta->ht_cap.ampdu_density; 199 } 200 201 if (sta->vht_cap.vht_supported) { 202 agg_size = sta->vht_cap.cap & 203 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 204 agg_size >>= 205 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 206 } else if (sta->ht_cap.ht_supported) { 207 agg_size = sta->ht_cap.ampdu_factor; 208 } 209 210 add_sta_cmd.station_flags |= 211 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 212 add_sta_cmd.station_flags |= 213 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 214 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 215 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 216 217 if (sta->wme) { 218 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 219 220 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 221 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 223 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 225 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 226 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 227 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 228 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 229 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 230 } 231 232 status = ADD_STA_SUCCESS; 233 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 234 iwl_mvm_add_sta_cmd_size(mvm), 235 &add_sta_cmd, &status); 236 if (ret) 237 return ret; 238 239 switch (status & IWL_ADD_STA_STATUS_MASK) { 240 case ADD_STA_SUCCESS: 241 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 242 break; 243 default: 244 ret = -EIO; 245 IWL_ERR(mvm, "ADD_STA failed\n"); 246 break; 247 } 248 249 return ret; 250 } 251 252 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 253 { 254 struct iwl_mvm_baid_data *data = 255 from_timer(data, t, session_timer); 256 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 257 struct iwl_mvm_baid_data *ba_data; 258 struct ieee80211_sta *sta; 259 struct iwl_mvm_sta *mvm_sta; 260 unsigned long timeout; 261 262 rcu_read_lock(); 263 264 ba_data = rcu_dereference(*rcu_ptr); 265 266 if (WARN_ON(!ba_data)) 267 goto unlock; 268 269 if (!ba_data->timeout) 270 goto unlock; 271 272 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 273 if (time_is_after_jiffies(timeout)) { 274 mod_timer(&ba_data->session_timer, timeout); 275 goto unlock; 276 } 277 278 /* Timer expired */ 279 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 280 281 /* 282 * sta should be valid unless the following happens: 283 * The firmware asserts which triggers a reconfig flow, but 284 * the reconfig fails before we set the pointer to sta into 285 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 286 * A-MDPU and hence the timer continues to run. Then, the 287 * timer expires and sta is NULL. 288 */ 289 if (!sta) 290 goto unlock; 291 292 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 293 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 294 sta->addr, ba_data->tid); 295 unlock: 296 rcu_read_unlock(); 297 } 298 299 /* Disable aggregations for a bitmap of TIDs for a given station */ 300 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 301 unsigned long disable_agg_tids, 302 bool remove_queue) 303 { 304 struct iwl_mvm_add_sta_cmd cmd = {}; 305 struct ieee80211_sta *sta; 306 struct iwl_mvm_sta *mvmsta; 307 u32 status; 308 u8 sta_id; 309 310 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 311 return -EINVAL; 312 313 sta_id = mvm->queue_info[queue].ra_sta_id; 314 315 rcu_read_lock(); 316 317 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 318 319 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 320 rcu_read_unlock(); 321 return -EINVAL; 322 } 323 324 mvmsta = iwl_mvm_sta_from_mac80211(sta); 325 326 mvmsta->tid_disable_agg |= disable_agg_tids; 327 328 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 329 cmd.sta_id = mvmsta->sta_id; 330 cmd.add_modify = STA_MODE_MODIFY; 331 cmd.modify_mask = STA_MODIFY_QUEUES; 332 if (disable_agg_tids) 333 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 334 if (remove_queue) 335 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 336 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 337 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 338 339 rcu_read_unlock(); 340 341 /* Notify FW of queue removal from the STA queues */ 342 status = ADD_STA_SUCCESS; 343 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 344 iwl_mvm_add_sta_cmd_size(mvm), 345 &cmd, &status); 346 } 347 348 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 349 int queue, u8 tid, u8 flags) 350 { 351 struct iwl_scd_txq_cfg_cmd cmd = { 352 .scd_queue = queue, 353 .action = SCD_CFG_DISABLE_QUEUE, 354 }; 355 int ret; 356 357 if (iwl_mvm_has_new_tx_api(mvm)) { 358 iwl_trans_txq_free(mvm->trans, queue); 359 360 return 0; 361 } 362 363 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 364 return 0; 365 366 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 367 368 cmd.action = mvm->queue_info[queue].tid_bitmap ? 369 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 370 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 371 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 372 373 IWL_DEBUG_TX_QUEUES(mvm, 374 "Disabling TXQ #%d tids=0x%x\n", 375 queue, 376 mvm->queue_info[queue].tid_bitmap); 377 378 /* If the queue is still enabled - nothing left to do in this func */ 379 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 380 return 0; 381 382 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 383 cmd.tid = mvm->queue_info[queue].txq_tid; 384 385 /* Make sure queue info is correct even though we overwrite it */ 386 WARN(mvm->queue_info[queue].tid_bitmap, 387 "TXQ #%d info out-of-sync - tids=0x%x\n", 388 queue, mvm->queue_info[queue].tid_bitmap); 389 390 /* If we are here - the queue is freed and we can zero out these vals */ 391 mvm->queue_info[queue].tid_bitmap = 0; 392 393 if (sta) { 394 struct iwl_mvm_txq *mvmtxq = 395 iwl_mvm_txq_from_tid(sta, tid); 396 397 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 398 } 399 400 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 401 mvm->queue_info[queue].reserved = false; 402 403 iwl_trans_txq_disable(mvm->trans, queue, false); 404 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 405 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 406 407 if (ret) 408 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 409 queue, ret); 410 return ret; 411 } 412 413 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 414 { 415 struct ieee80211_sta *sta; 416 struct iwl_mvm_sta *mvmsta; 417 unsigned long tid_bitmap; 418 unsigned long agg_tids = 0; 419 u8 sta_id; 420 int tid; 421 422 lockdep_assert_held(&mvm->mutex); 423 424 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 425 return -EINVAL; 426 427 sta_id = mvm->queue_info[queue].ra_sta_id; 428 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 429 430 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 431 lockdep_is_held(&mvm->mutex)); 432 433 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 434 return -EINVAL; 435 436 mvmsta = iwl_mvm_sta_from_mac80211(sta); 437 438 spin_lock_bh(&mvmsta->lock); 439 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 440 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 441 agg_tids |= BIT(tid); 442 } 443 spin_unlock_bh(&mvmsta->lock); 444 445 return agg_tids; 446 } 447 448 /* 449 * Remove a queue from a station's resources. 450 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 451 * doesn't disable the queue 452 */ 453 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 454 { 455 struct ieee80211_sta *sta; 456 struct iwl_mvm_sta *mvmsta; 457 unsigned long tid_bitmap; 458 unsigned long disable_agg_tids = 0; 459 u8 sta_id; 460 int tid; 461 462 lockdep_assert_held(&mvm->mutex); 463 464 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 465 return -EINVAL; 466 467 sta_id = mvm->queue_info[queue].ra_sta_id; 468 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 469 470 rcu_read_lock(); 471 472 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 473 474 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 475 rcu_read_unlock(); 476 return 0; 477 } 478 479 mvmsta = iwl_mvm_sta_from_mac80211(sta); 480 481 spin_lock_bh(&mvmsta->lock); 482 /* Unmap MAC queues and TIDs from this queue */ 483 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 484 struct iwl_mvm_txq *mvmtxq = 485 iwl_mvm_txq_from_tid(sta, tid); 486 487 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 488 disable_agg_tids |= BIT(tid); 489 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 490 491 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 492 } 493 494 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 495 spin_unlock_bh(&mvmsta->lock); 496 497 rcu_read_unlock(); 498 499 /* 500 * The TX path may have been using this TXQ_ID from the tid_data, 501 * so make sure it's no longer running so that we can safely reuse 502 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 503 * above, but nothing guarantees we've stopped using them. Thus, 504 * without this, we could get to iwl_mvm_disable_txq() and remove 505 * the queue while still sending frames to it. 506 */ 507 synchronize_net(); 508 509 return disable_agg_tids; 510 } 511 512 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 513 struct ieee80211_sta *old_sta, 514 u8 new_sta_id) 515 { 516 struct iwl_mvm_sta *mvmsta; 517 u8 sta_id, tid; 518 unsigned long disable_agg_tids = 0; 519 bool same_sta; 520 int ret; 521 522 lockdep_assert_held(&mvm->mutex); 523 524 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 525 return -EINVAL; 526 527 sta_id = mvm->queue_info[queue].ra_sta_id; 528 tid = mvm->queue_info[queue].txq_tid; 529 530 same_sta = sta_id == new_sta_id; 531 532 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 533 if (WARN_ON(!mvmsta)) 534 return -EINVAL; 535 536 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 537 /* Disable the queue */ 538 if (disable_agg_tids) 539 iwl_mvm_invalidate_sta_queue(mvm, queue, 540 disable_agg_tids, false); 541 542 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 543 if (ret) { 544 IWL_ERR(mvm, 545 "Failed to free inactive queue %d (ret=%d)\n", 546 queue, ret); 547 548 return ret; 549 } 550 551 /* If TXQ is allocated to another STA, update removal in FW */ 552 if (!same_sta) 553 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 554 555 return 0; 556 } 557 558 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 559 unsigned long tfd_queue_mask, u8 ac) 560 { 561 int queue = 0; 562 u8 ac_to_queue[IEEE80211_NUM_ACS]; 563 int i; 564 565 /* 566 * This protects us against grabbing a queue that's being reconfigured 567 * by the inactivity checker. 568 */ 569 lockdep_assert_held(&mvm->mutex); 570 571 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 572 return -EINVAL; 573 574 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 575 576 /* See what ACs the existing queues for this STA have */ 577 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 578 /* Only DATA queues can be shared */ 579 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 580 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 581 continue; 582 583 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 584 } 585 586 /* 587 * The queue to share is chosen only from DATA queues as follows (in 588 * descending priority): 589 * 1. An AC_BE queue 590 * 2. Same AC queue 591 * 3. Highest AC queue that is lower than new AC 592 * 4. Any existing AC (there always is at least 1 DATA queue) 593 */ 594 595 /* Priority 1: An AC_BE queue */ 596 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 597 queue = ac_to_queue[IEEE80211_AC_BE]; 598 /* Priority 2: Same AC queue */ 599 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 600 queue = ac_to_queue[ac]; 601 /* Priority 3a: If new AC is VO and VI exists - use VI */ 602 else if (ac == IEEE80211_AC_VO && 603 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 604 queue = ac_to_queue[IEEE80211_AC_VI]; 605 /* Priority 3b: No BE so only AC less than the new one is BK */ 606 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 607 queue = ac_to_queue[IEEE80211_AC_BK]; 608 /* Priority 4a: No BE nor BK - use VI if exists */ 609 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 610 queue = ac_to_queue[IEEE80211_AC_VI]; 611 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 612 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 613 queue = ac_to_queue[IEEE80211_AC_VO]; 614 615 /* Make sure queue found (or not) is legal */ 616 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 617 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 618 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 619 IWL_ERR(mvm, "No DATA queues available to share\n"); 620 return -ENOSPC; 621 } 622 623 return queue; 624 } 625 626 /* 627 * If a given queue has a higher AC than the TID stream that is being compared 628 * to, the queue needs to be redirected to the lower AC. This function does that 629 * in such a case, otherwise - if no redirection required - it does nothing, 630 * unless the %force param is true. 631 */ 632 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 633 int ac, int ssn, unsigned int wdg_timeout, 634 bool force, struct iwl_mvm_txq *txq) 635 { 636 struct iwl_scd_txq_cfg_cmd cmd = { 637 .scd_queue = queue, 638 .action = SCD_CFG_DISABLE_QUEUE, 639 }; 640 bool shared_queue; 641 int ret; 642 643 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 644 return -EINVAL; 645 646 /* 647 * If the AC is lower than current one - FIFO needs to be redirected to 648 * the lowest one of the streams in the queue. Check if this is needed 649 * here. 650 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 651 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 652 * we need to check if the numerical value of X is LARGER than of Y. 653 */ 654 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 655 IWL_DEBUG_TX_QUEUES(mvm, 656 "No redirection needed on TXQ #%d\n", 657 queue); 658 return 0; 659 } 660 661 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 662 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 663 cmd.tid = mvm->queue_info[queue].txq_tid; 664 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 665 666 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 667 queue, iwl_mvm_ac_to_tx_fifo[ac]); 668 669 /* Stop the queue and wait for it to empty */ 670 txq->stopped = true; 671 672 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 673 if (ret) { 674 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 675 queue); 676 ret = -EIO; 677 goto out; 678 } 679 680 /* Before redirecting the queue we need to de-activate it */ 681 iwl_trans_txq_disable(mvm->trans, queue, false); 682 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 683 if (ret) 684 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 685 ret); 686 687 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 688 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 689 690 /* Update the TID "owner" of the queue */ 691 mvm->queue_info[queue].txq_tid = tid; 692 693 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 694 695 /* Redirect to lower AC */ 696 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 697 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 698 699 /* Update AC marking of the queue */ 700 mvm->queue_info[queue].mac80211_ac = ac; 701 702 /* 703 * Mark queue as shared in transport if shared 704 * Note this has to be done after queue enablement because enablement 705 * can also set this value, and there is no indication there to shared 706 * queues 707 */ 708 if (shared_queue) 709 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 710 711 out: 712 /* Continue using the queue */ 713 txq->stopped = false; 714 715 return ret; 716 } 717 718 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 719 u8 minq, u8 maxq) 720 { 721 int i; 722 723 lockdep_assert_held(&mvm->mutex); 724 725 /* This should not be hit with new TX path */ 726 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 727 return -ENOSPC; 728 729 /* Start by looking for a free queue */ 730 for (i = minq; i <= maxq; i++) 731 if (mvm->queue_info[i].tid_bitmap == 0 && 732 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 733 return i; 734 735 return -ENOSPC; 736 } 737 738 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 739 u8 sta_id, u8 tid, unsigned int timeout) 740 { 741 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE, 742 mvm->trans->cfg->min_256_ba_txq_size); 743 744 if (tid == IWL_MAX_TID_COUNT) { 745 tid = IWL_MGMT_TID; 746 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 747 mvm->trans->cfg->min_txq_size); 748 } 749 queue = iwl_trans_txq_alloc(mvm->trans, 750 cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE), 751 sta_id, tid, SCD_QUEUE_CFG, size, timeout); 752 753 if (queue < 0) { 754 IWL_DEBUG_TX_QUEUES(mvm, 755 "Failed allocating TXQ for sta %d tid %d, ret: %d\n", 756 sta_id, tid, queue); 757 return queue; 758 } 759 760 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 761 queue, sta_id, tid); 762 763 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue); 764 765 return queue; 766 } 767 768 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 769 struct ieee80211_sta *sta, u8 ac, 770 int tid) 771 { 772 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 773 struct iwl_mvm_txq *mvmtxq = 774 iwl_mvm_txq_from_tid(sta, tid); 775 unsigned int wdg_timeout = 776 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 777 int queue = -1; 778 779 lockdep_assert_held(&mvm->mutex); 780 781 IWL_DEBUG_TX_QUEUES(mvm, 782 "Allocating queue for sta %d on tid %d\n", 783 mvmsta->sta_id, tid); 784 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 785 if (queue < 0) 786 return queue; 787 788 mvmtxq->txq_id = queue; 789 mvm->tvqm_info[queue].txq_tid = tid; 790 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 791 792 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 793 794 spin_lock_bh(&mvmsta->lock); 795 mvmsta->tid_data[tid].txq_id = queue; 796 spin_unlock_bh(&mvmsta->lock); 797 798 return 0; 799 } 800 801 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 802 struct ieee80211_sta *sta, 803 int queue, u8 sta_id, u8 tid) 804 { 805 bool enable_queue = true; 806 807 /* Make sure this TID isn't already enabled */ 808 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 809 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 810 queue, tid); 811 return false; 812 } 813 814 /* Update mappings and refcounts */ 815 if (mvm->queue_info[queue].tid_bitmap) 816 enable_queue = false; 817 818 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 819 mvm->queue_info[queue].ra_sta_id = sta_id; 820 821 if (enable_queue) { 822 if (tid != IWL_MAX_TID_COUNT) 823 mvm->queue_info[queue].mac80211_ac = 824 tid_to_mac80211_ac[tid]; 825 else 826 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 827 828 mvm->queue_info[queue].txq_tid = tid; 829 } 830 831 if (sta) { 832 struct iwl_mvm_txq *mvmtxq = 833 iwl_mvm_txq_from_tid(sta, tid); 834 835 mvmtxq->txq_id = queue; 836 } 837 838 IWL_DEBUG_TX_QUEUES(mvm, 839 "Enabling TXQ #%d tids=0x%x\n", 840 queue, mvm->queue_info[queue].tid_bitmap); 841 842 return enable_queue; 843 } 844 845 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 846 int queue, u16 ssn, 847 const struct iwl_trans_txq_scd_cfg *cfg, 848 unsigned int wdg_timeout) 849 { 850 struct iwl_scd_txq_cfg_cmd cmd = { 851 .scd_queue = queue, 852 .action = SCD_CFG_ENABLE_QUEUE, 853 .window = cfg->frame_limit, 854 .sta_id = cfg->sta_id, 855 .ssn = cpu_to_le16(ssn), 856 .tx_fifo = cfg->fifo, 857 .aggregate = cfg->aggregate, 858 .tid = cfg->tid, 859 }; 860 bool inc_ssn; 861 862 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 863 return false; 864 865 /* Send the enabling command if we need to */ 866 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 867 return false; 868 869 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 870 NULL, wdg_timeout); 871 if (inc_ssn) 872 le16_add_cpu(&cmd.ssn, 1); 873 874 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 875 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 876 877 return inc_ssn; 878 } 879 880 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 881 { 882 struct iwl_scd_txq_cfg_cmd cmd = { 883 .scd_queue = queue, 884 .action = SCD_CFG_UPDATE_QUEUE_TID, 885 }; 886 int tid; 887 unsigned long tid_bitmap; 888 int ret; 889 890 lockdep_assert_held(&mvm->mutex); 891 892 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 893 return; 894 895 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 896 897 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 898 return; 899 900 /* Find any TID for queue */ 901 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 902 cmd.tid = tid; 903 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 904 905 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 906 if (ret) { 907 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 908 queue, ret); 909 return; 910 } 911 912 mvm->queue_info[queue].txq_tid = tid; 913 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 914 queue, tid); 915 } 916 917 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 918 { 919 struct ieee80211_sta *sta; 920 struct iwl_mvm_sta *mvmsta; 921 u8 sta_id; 922 int tid = -1; 923 unsigned long tid_bitmap; 924 unsigned int wdg_timeout; 925 int ssn; 926 int ret = true; 927 928 /* queue sharing is disabled on new TX path */ 929 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 930 return; 931 932 lockdep_assert_held(&mvm->mutex); 933 934 sta_id = mvm->queue_info[queue].ra_sta_id; 935 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 936 937 /* Find TID for queue, and make sure it is the only one on the queue */ 938 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 939 if (tid_bitmap != BIT(tid)) { 940 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 941 queue, tid_bitmap); 942 return; 943 } 944 945 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 946 tid); 947 948 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 949 lockdep_is_held(&mvm->mutex)); 950 951 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 952 return; 953 954 mvmsta = iwl_mvm_sta_from_mac80211(sta); 955 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 956 957 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 958 959 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 960 tid_to_mac80211_ac[tid], ssn, 961 wdg_timeout, true, 962 iwl_mvm_txq_from_tid(sta, tid)); 963 if (ret) { 964 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 965 return; 966 } 967 968 /* If aggs should be turned back on - do it */ 969 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 970 struct iwl_mvm_add_sta_cmd cmd = {0}; 971 972 mvmsta->tid_disable_agg &= ~BIT(tid); 973 974 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 975 cmd.sta_id = mvmsta->sta_id; 976 cmd.add_modify = STA_MODE_MODIFY; 977 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 978 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 979 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 980 981 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 982 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 983 if (!ret) { 984 IWL_DEBUG_TX_QUEUES(mvm, 985 "TXQ #%d is now aggregated again\n", 986 queue); 987 988 /* Mark queue intenally as aggregating again */ 989 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 990 } 991 } 992 993 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 994 } 995 996 /* 997 * Remove inactive TIDs of a given queue. 998 * If all queue TIDs are inactive - mark the queue as inactive 999 * If only some the queue TIDs are inactive - unmap them from the queue 1000 * 1001 * Returns %true if all TIDs were removed and the queue could be reused. 1002 */ 1003 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1004 struct iwl_mvm_sta *mvmsta, int queue, 1005 unsigned long tid_bitmap, 1006 unsigned long *unshare_queues, 1007 unsigned long *changetid_queues) 1008 { 1009 int tid; 1010 1011 lockdep_assert_held(&mvmsta->lock); 1012 lockdep_assert_held(&mvm->mutex); 1013 1014 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1015 return false; 1016 1017 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1018 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1019 /* If some TFDs are still queued - don't mark TID as inactive */ 1020 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1021 tid_bitmap &= ~BIT(tid); 1022 1023 /* Don't mark as inactive any TID that has an active BA */ 1024 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1025 tid_bitmap &= ~BIT(tid); 1026 } 1027 1028 /* If all TIDs in the queue are inactive - return it can be reused */ 1029 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1030 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1031 return true; 1032 } 1033 1034 /* 1035 * If we are here, this is a shared queue and not all TIDs timed-out. 1036 * Remove the ones that did. 1037 */ 1038 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1039 u16 tid_bitmap; 1040 1041 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1042 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1043 1044 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1045 1046 /* 1047 * We need to take into account a situation in which a TXQ was 1048 * allocated to TID x, and then turned shared by adding TIDs y 1049 * and z. If TID x becomes inactive and is removed from the TXQ, 1050 * ownership must be given to one of the remaining TIDs. 1051 * This is mainly because if TID x continues - a new queue can't 1052 * be allocated for it as long as it is an owner of another TXQ. 1053 * 1054 * Mark this queue in the right bitmap, we'll send the command 1055 * to the firmware later. 1056 */ 1057 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1058 set_bit(queue, changetid_queues); 1059 1060 IWL_DEBUG_TX_QUEUES(mvm, 1061 "Removing inactive TID %d from shared Q:%d\n", 1062 tid, queue); 1063 } 1064 1065 IWL_DEBUG_TX_QUEUES(mvm, 1066 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1067 mvm->queue_info[queue].tid_bitmap); 1068 1069 /* 1070 * There may be different TIDs with the same mac queues, so make 1071 * sure all TIDs have existing corresponding mac queues enabled 1072 */ 1073 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1074 1075 /* If the queue is marked as shared - "unshare" it */ 1076 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1077 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1078 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1079 queue); 1080 set_bit(queue, unshare_queues); 1081 } 1082 1083 return false; 1084 } 1085 1086 /* 1087 * Check for inactivity - this includes checking if any queue 1088 * can be unshared and finding one (and only one) that can be 1089 * reused. 1090 * This function is also invoked as a sort of clean-up task, 1091 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1092 * 1093 * Returns the queue number, or -ENOSPC. 1094 */ 1095 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1096 { 1097 unsigned long now = jiffies; 1098 unsigned long unshare_queues = 0; 1099 unsigned long changetid_queues = 0; 1100 int i, ret, free_queue = -ENOSPC; 1101 struct ieee80211_sta *queue_owner = NULL; 1102 1103 lockdep_assert_held(&mvm->mutex); 1104 1105 if (iwl_mvm_has_new_tx_api(mvm)) 1106 return -ENOSPC; 1107 1108 rcu_read_lock(); 1109 1110 /* we skip the CMD queue below by starting at 1 */ 1111 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1112 1113 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1114 struct ieee80211_sta *sta; 1115 struct iwl_mvm_sta *mvmsta; 1116 u8 sta_id; 1117 int tid; 1118 unsigned long inactive_tid_bitmap = 0; 1119 unsigned long queue_tid_bitmap; 1120 1121 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1122 if (!queue_tid_bitmap) 1123 continue; 1124 1125 /* If TXQ isn't in active use anyway - nothing to do here... */ 1126 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1127 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1128 continue; 1129 1130 /* Check to see if there are inactive TIDs on this queue */ 1131 for_each_set_bit(tid, &queue_tid_bitmap, 1132 IWL_MAX_TID_COUNT + 1) { 1133 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1134 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1135 continue; 1136 1137 inactive_tid_bitmap |= BIT(tid); 1138 } 1139 1140 /* If all TIDs are active - finish check on this queue */ 1141 if (!inactive_tid_bitmap) 1142 continue; 1143 1144 /* 1145 * If we are here - the queue hadn't been served recently and is 1146 * in use 1147 */ 1148 1149 sta_id = mvm->queue_info[i].ra_sta_id; 1150 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1151 1152 /* 1153 * If the STA doesn't exist anymore, it isn't an error. It could 1154 * be that it was removed since getting the queues, and in this 1155 * case it should've inactivated its queues anyway. 1156 */ 1157 if (IS_ERR_OR_NULL(sta)) 1158 continue; 1159 1160 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1161 1162 spin_lock_bh(&mvmsta->lock); 1163 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1164 inactive_tid_bitmap, 1165 &unshare_queues, 1166 &changetid_queues); 1167 if (ret >= 0 && free_queue < 0) { 1168 queue_owner = sta; 1169 free_queue = ret; 1170 } 1171 /* only unlock sta lock - we still need the queue info lock */ 1172 spin_unlock_bh(&mvmsta->lock); 1173 } 1174 1175 1176 /* Reconfigure queues requiring reconfiguation */ 1177 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1178 iwl_mvm_unshare_queue(mvm, i); 1179 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1180 iwl_mvm_change_queue_tid(mvm, i); 1181 1182 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1183 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1184 alloc_for_sta); 1185 if (ret) { 1186 rcu_read_unlock(); 1187 return ret; 1188 } 1189 } 1190 1191 rcu_read_unlock(); 1192 1193 return free_queue; 1194 } 1195 1196 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1197 struct ieee80211_sta *sta, u8 ac, int tid) 1198 { 1199 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1200 struct iwl_trans_txq_scd_cfg cfg = { 1201 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1202 .sta_id = mvmsta->sta_id, 1203 .tid = tid, 1204 .frame_limit = IWL_FRAME_LIMIT, 1205 }; 1206 unsigned int wdg_timeout = 1207 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1208 int queue = -1; 1209 unsigned long disable_agg_tids = 0; 1210 enum iwl_mvm_agg_state queue_state; 1211 bool shared_queue = false, inc_ssn; 1212 int ssn; 1213 unsigned long tfd_queue_mask; 1214 int ret; 1215 1216 lockdep_assert_held(&mvm->mutex); 1217 1218 if (iwl_mvm_has_new_tx_api(mvm)) 1219 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1220 1221 spin_lock_bh(&mvmsta->lock); 1222 tfd_queue_mask = mvmsta->tfd_queue_msk; 1223 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1224 spin_unlock_bh(&mvmsta->lock); 1225 1226 if (tid == IWL_MAX_TID_COUNT) { 1227 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1228 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1229 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1230 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1231 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1232 queue); 1233 1234 /* If no such queue is found, we'll use a DATA queue instead */ 1235 } 1236 1237 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1238 (mvm->queue_info[mvmsta->reserved_queue].status == 1239 IWL_MVM_QUEUE_RESERVED)) { 1240 queue = mvmsta->reserved_queue; 1241 mvm->queue_info[queue].reserved = true; 1242 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1243 } 1244 1245 if (queue < 0) 1246 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1247 IWL_MVM_DQA_MIN_DATA_QUEUE, 1248 IWL_MVM_DQA_MAX_DATA_QUEUE); 1249 if (queue < 0) { 1250 /* try harder - perhaps kill an inactive queue */ 1251 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1252 } 1253 1254 /* No free queue - we'll have to share */ 1255 if (queue <= 0) { 1256 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1257 if (queue > 0) { 1258 shared_queue = true; 1259 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1260 } 1261 } 1262 1263 /* 1264 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1265 * to make sure no one else takes it. 1266 * This will allow avoiding re-acquiring the lock at the end of the 1267 * configuration. On error we'll mark it back as free. 1268 */ 1269 if (queue > 0 && !shared_queue) 1270 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1271 1272 /* This shouldn't happen - out of queues */ 1273 if (WARN_ON(queue <= 0)) { 1274 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1275 tid, cfg.sta_id); 1276 return queue; 1277 } 1278 1279 /* 1280 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1281 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1282 * as aggregatable. 1283 * Mark all DATA queues as allowing to be aggregated at some point 1284 */ 1285 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1286 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1287 1288 IWL_DEBUG_TX_QUEUES(mvm, 1289 "Allocating %squeue #%d to sta %d on tid %d\n", 1290 shared_queue ? "shared " : "", queue, 1291 mvmsta->sta_id, tid); 1292 1293 if (shared_queue) { 1294 /* Disable any open aggs on this queue */ 1295 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1296 1297 if (disable_agg_tids) { 1298 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1299 queue); 1300 iwl_mvm_invalidate_sta_queue(mvm, queue, 1301 disable_agg_tids, false); 1302 } 1303 } 1304 1305 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1306 1307 /* 1308 * Mark queue as shared in transport if shared 1309 * Note this has to be done after queue enablement because enablement 1310 * can also set this value, and there is no indication there to shared 1311 * queues 1312 */ 1313 if (shared_queue) 1314 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1315 1316 spin_lock_bh(&mvmsta->lock); 1317 /* 1318 * This looks racy, but it is not. We have only one packet for 1319 * this ra/tid in our Tx path since we stop the Qdisc when we 1320 * need to allocate a new TFD queue. 1321 */ 1322 if (inc_ssn) { 1323 mvmsta->tid_data[tid].seq_number += 0x10; 1324 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1325 } 1326 mvmsta->tid_data[tid].txq_id = queue; 1327 mvmsta->tfd_queue_msk |= BIT(queue); 1328 queue_state = mvmsta->tid_data[tid].state; 1329 1330 if (mvmsta->reserved_queue == queue) 1331 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1332 spin_unlock_bh(&mvmsta->lock); 1333 1334 if (!shared_queue) { 1335 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1336 if (ret) 1337 goto out_err; 1338 1339 /* If we need to re-enable aggregations... */ 1340 if (queue_state == IWL_AGG_ON) { 1341 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1342 if (ret) 1343 goto out_err; 1344 } 1345 } else { 1346 /* Redirect queue, if needed */ 1347 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1348 wdg_timeout, false, 1349 iwl_mvm_txq_from_tid(sta, tid)); 1350 if (ret) 1351 goto out_err; 1352 } 1353 1354 return 0; 1355 1356 out_err: 1357 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1358 1359 return ret; 1360 } 1361 1362 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1363 { 1364 if (tid == IWL_MAX_TID_COUNT) 1365 return IEEE80211_AC_VO; /* MGMT */ 1366 1367 return tid_to_mac80211_ac[tid]; 1368 } 1369 1370 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1371 { 1372 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1373 add_stream_wk); 1374 1375 mutex_lock(&mvm->mutex); 1376 1377 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1378 1379 while (!list_empty(&mvm->add_stream_txqs)) { 1380 struct iwl_mvm_txq *mvmtxq; 1381 struct ieee80211_txq *txq; 1382 u8 tid; 1383 1384 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1385 struct iwl_mvm_txq, list); 1386 1387 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1388 drv_priv); 1389 tid = txq->tid; 1390 if (tid == IEEE80211_NUM_TIDS) 1391 tid = IWL_MAX_TID_COUNT; 1392 1393 iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid); 1394 list_del_init(&mvmtxq->list); 1395 local_bh_disable(); 1396 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1397 local_bh_enable(); 1398 } 1399 1400 mutex_unlock(&mvm->mutex); 1401 } 1402 1403 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1404 struct ieee80211_sta *sta, 1405 enum nl80211_iftype vif_type) 1406 { 1407 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1408 int queue; 1409 1410 /* queue reserving is disabled on new TX path */ 1411 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1412 return 0; 1413 1414 /* run the general cleanup/unsharing of queues */ 1415 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1416 1417 /* Make sure we have free resources for this STA */ 1418 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1419 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1420 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1421 IWL_MVM_QUEUE_FREE)) 1422 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1423 else 1424 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1425 IWL_MVM_DQA_MIN_DATA_QUEUE, 1426 IWL_MVM_DQA_MAX_DATA_QUEUE); 1427 if (queue < 0) { 1428 /* try again - this time kick out a queue if needed */ 1429 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1430 if (queue < 0) { 1431 IWL_ERR(mvm, "No available queues for new station\n"); 1432 return -ENOSPC; 1433 } 1434 } 1435 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1436 1437 mvmsta->reserved_queue = queue; 1438 1439 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1440 queue, mvmsta->sta_id); 1441 1442 return 0; 1443 } 1444 1445 /* 1446 * In DQA mode, after a HW restart the queues should be allocated as before, in 1447 * order to avoid race conditions when there are shared queues. This function 1448 * does the re-mapping and queue allocation. 1449 * 1450 * Note that re-enabling aggregations isn't done in this function. 1451 */ 1452 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1453 struct ieee80211_sta *sta) 1454 { 1455 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1456 unsigned int wdg = 1457 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1458 int i; 1459 struct iwl_trans_txq_scd_cfg cfg = { 1460 .sta_id = mvm_sta->sta_id, 1461 .frame_limit = IWL_FRAME_LIMIT, 1462 }; 1463 1464 /* Make sure reserved queue is still marked as such (if allocated) */ 1465 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1466 mvm->queue_info[mvm_sta->reserved_queue].status = 1467 IWL_MVM_QUEUE_RESERVED; 1468 1469 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1470 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1471 int txq_id = tid_data->txq_id; 1472 int ac; 1473 1474 if (txq_id == IWL_MVM_INVALID_QUEUE) 1475 continue; 1476 1477 ac = tid_to_mac80211_ac[i]; 1478 1479 if (iwl_mvm_has_new_tx_api(mvm)) { 1480 IWL_DEBUG_TX_QUEUES(mvm, 1481 "Re-mapping sta %d tid %d\n", 1482 mvm_sta->sta_id, i); 1483 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1484 i, wdg); 1485 /* 1486 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1487 * to try again later, we have no other good way of 1488 * failing here 1489 */ 1490 if (txq_id < 0) 1491 txq_id = IWL_MVM_INVALID_QUEUE; 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->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 else 1687 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1688 1689 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1690 1691 update_fw: 1692 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1693 if (ret) 1694 goto err; 1695 1696 if (vif->type == NL80211_IFTYPE_STATION) { 1697 if (!sta->tdls) { 1698 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1699 mvmvif->ap_sta_id = sta_id; 1700 } else { 1701 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1702 } 1703 } 1704 1705 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1706 1707 return 0; 1708 1709 err: 1710 return ret; 1711 } 1712 1713 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1714 bool drain) 1715 { 1716 struct iwl_mvm_add_sta_cmd cmd = {}; 1717 int ret; 1718 u32 status; 1719 1720 lockdep_assert_held(&mvm->mutex); 1721 1722 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1723 cmd.sta_id = mvmsta->sta_id; 1724 cmd.add_modify = STA_MODE_MODIFY; 1725 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1726 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1727 1728 status = ADD_STA_SUCCESS; 1729 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1730 iwl_mvm_add_sta_cmd_size(mvm), 1731 &cmd, &status); 1732 if (ret) 1733 return ret; 1734 1735 switch (status & IWL_ADD_STA_STATUS_MASK) { 1736 case ADD_STA_SUCCESS: 1737 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1738 mvmsta->sta_id); 1739 break; 1740 default: 1741 ret = -EIO; 1742 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1743 mvmsta->sta_id); 1744 break; 1745 } 1746 1747 return ret; 1748 } 1749 1750 /* 1751 * Remove a station from the FW table. Before sending the command to remove 1752 * the station validate that the station is indeed known to the driver (sanity 1753 * only). 1754 */ 1755 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1756 { 1757 struct ieee80211_sta *sta; 1758 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1759 .sta_id = sta_id, 1760 }; 1761 int ret; 1762 1763 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1764 lockdep_is_held(&mvm->mutex)); 1765 1766 /* Note: internal stations are marked as error values */ 1767 if (!sta) { 1768 IWL_ERR(mvm, "Invalid station id\n"); 1769 return -EINVAL; 1770 } 1771 1772 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1773 sizeof(rm_sta_cmd), &rm_sta_cmd); 1774 if (ret) { 1775 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1776 return ret; 1777 } 1778 1779 return 0; 1780 } 1781 1782 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1783 struct ieee80211_vif *vif, 1784 struct ieee80211_sta *sta) 1785 { 1786 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1787 int i; 1788 1789 lockdep_assert_held(&mvm->mutex); 1790 1791 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1792 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1793 continue; 1794 1795 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1796 0); 1797 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1798 } 1799 1800 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1801 struct iwl_mvm_txq *mvmtxq = 1802 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1803 1804 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1805 } 1806 } 1807 1808 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1809 struct iwl_mvm_sta *mvm_sta) 1810 { 1811 int i; 1812 1813 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1814 u16 txq_id; 1815 int ret; 1816 1817 spin_lock_bh(&mvm_sta->lock); 1818 txq_id = mvm_sta->tid_data[i].txq_id; 1819 spin_unlock_bh(&mvm_sta->lock); 1820 1821 if (txq_id == IWL_MVM_INVALID_QUEUE) 1822 continue; 1823 1824 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1825 if (ret) 1826 return ret; 1827 } 1828 1829 return 0; 1830 } 1831 1832 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1833 struct ieee80211_vif *vif, 1834 struct ieee80211_sta *sta) 1835 { 1836 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1837 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1838 u8 sta_id = mvm_sta->sta_id; 1839 int ret; 1840 1841 lockdep_assert_held(&mvm->mutex); 1842 1843 if (iwl_mvm_has_new_rx_api(mvm)) 1844 kfree(mvm_sta->dup_data); 1845 1846 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1847 if (ret) 1848 return ret; 1849 1850 /* flush its queues here since we are freeing mvm_sta */ 1851 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1852 if (ret) 1853 return ret; 1854 if (iwl_mvm_has_new_tx_api(mvm)) { 1855 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1856 } else { 1857 u32 q_mask = mvm_sta->tfd_queue_msk; 1858 1859 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1860 q_mask); 1861 } 1862 if (ret) 1863 return ret; 1864 1865 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1866 1867 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1868 1869 /* If there is a TXQ still marked as reserved - free it */ 1870 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1871 u8 reserved_txq = mvm_sta->reserved_queue; 1872 enum iwl_mvm_queue_status *status; 1873 1874 /* 1875 * If no traffic has gone through the reserved TXQ - it 1876 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1877 * should be manually marked as free again 1878 */ 1879 status = &mvm->queue_info[reserved_txq].status; 1880 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1881 (*status != IWL_MVM_QUEUE_FREE), 1882 "sta_id %d reserved txq %d status %d", 1883 sta_id, reserved_txq, *status)) 1884 return -EINVAL; 1885 1886 *status = IWL_MVM_QUEUE_FREE; 1887 } 1888 1889 if (vif->type == NL80211_IFTYPE_STATION && 1890 mvmvif->ap_sta_id == sta_id) { 1891 /* if associated - we can't remove the AP STA now */ 1892 if (vif->bss_conf.assoc) 1893 return ret; 1894 1895 /* unassoc - go ahead - remove the AP STA now */ 1896 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1897 } 1898 1899 /* 1900 * This shouldn't happen - the TDLS channel switch should be canceled 1901 * before the STA is removed. 1902 */ 1903 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1904 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1905 cancel_delayed_work(&mvm->tdls_cs.dwork); 1906 } 1907 1908 /* 1909 * Make sure that the tx response code sees the station as -EBUSY and 1910 * calls the drain worker. 1911 */ 1912 spin_lock_bh(&mvm_sta->lock); 1913 spin_unlock_bh(&mvm_sta->lock); 1914 1915 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1916 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1917 1918 return ret; 1919 } 1920 1921 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1922 struct ieee80211_vif *vif, 1923 u8 sta_id) 1924 { 1925 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1926 1927 lockdep_assert_held(&mvm->mutex); 1928 1929 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1930 return ret; 1931 } 1932 1933 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1934 struct iwl_mvm_int_sta *sta, 1935 u32 qmask, enum nl80211_iftype iftype, 1936 enum iwl_sta_type type) 1937 { 1938 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1939 sta->sta_id == IWL_MVM_INVALID_STA) { 1940 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1941 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1942 return -ENOSPC; 1943 } 1944 1945 sta->tfd_queue_msk = qmask; 1946 sta->type = type; 1947 1948 /* put a non-NULL value so iterating over the stations won't stop */ 1949 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1950 return 0; 1951 } 1952 1953 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1954 { 1955 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1956 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1957 sta->sta_id = IWL_MVM_INVALID_STA; 1958 } 1959 1960 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 1961 u8 sta_id, u8 fifo) 1962 { 1963 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1964 mvm->trans->trans_cfg->base_params->wd_timeout : 1965 IWL_WATCHDOG_DISABLED; 1966 struct iwl_trans_txq_scd_cfg cfg = { 1967 .fifo = fifo, 1968 .sta_id = sta_id, 1969 .tid = IWL_MAX_TID_COUNT, 1970 .aggregate = false, 1971 .frame_limit = IWL_FRAME_LIMIT, 1972 }; 1973 1974 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1975 1976 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 1977 } 1978 1979 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 1980 { 1981 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1982 mvm->trans->trans_cfg->base_params->wd_timeout : 1983 IWL_WATCHDOG_DISABLED; 1984 1985 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1986 1987 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 1988 wdg_timeout); 1989 } 1990 1991 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 1992 int maccolor, 1993 struct iwl_mvm_int_sta *sta, 1994 u16 *queue, int fifo) 1995 { 1996 int ret; 1997 1998 /* Map queue to fifo - needs to happen before adding station */ 1999 if (!iwl_mvm_has_new_tx_api(mvm)) 2000 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2001 2002 ret = iwl_mvm_add_int_sta_common(mvm, sta, NULL, macidx, maccolor); 2003 if (ret) { 2004 if (!iwl_mvm_has_new_tx_api(mvm)) 2005 iwl_mvm_disable_txq(mvm, NULL, *queue, 2006 IWL_MAX_TID_COUNT, 0); 2007 return ret; 2008 } 2009 2010 /* 2011 * For 22000 firmware and on we cannot add queue to a station unknown 2012 * to firmware so enable queue here - after the station was added 2013 */ 2014 if (iwl_mvm_has_new_tx_api(mvm)) { 2015 int txq; 2016 2017 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2018 if (txq < 0) { 2019 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2020 return txq; 2021 } 2022 2023 *queue = txq; 2024 } 2025 2026 return 0; 2027 } 2028 2029 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 2030 { 2031 int ret; 2032 2033 lockdep_assert_held(&mvm->mutex); 2034 2035 /* Allocate aux station and assign to it the aux queue */ 2036 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2037 NL80211_IFTYPE_UNSPECIFIED, 2038 IWL_STA_AUX_ACTIVITY); 2039 if (ret) 2040 return ret; 2041 2042 ret = iwl_mvm_add_int_sta_with_queue(mvm, MAC_INDEX_AUX, 0, 2043 &mvm->aux_sta, &mvm->aux_queue, 2044 IWL_MVM_TX_FIFO_MCAST); 2045 if (ret) { 2046 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2047 return ret; 2048 } 2049 2050 return 0; 2051 } 2052 2053 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2054 { 2055 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2056 2057 lockdep_assert_held(&mvm->mutex); 2058 2059 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2060 &mvm->snif_sta, &mvm->snif_queue, 2061 IWL_MVM_TX_FIFO_BE); 2062 } 2063 2064 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2065 { 2066 int ret; 2067 2068 lockdep_assert_held(&mvm->mutex); 2069 2070 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2071 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2072 if (ret) 2073 IWL_WARN(mvm, "Failed sending remove station\n"); 2074 2075 return ret; 2076 } 2077 2078 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2079 { 2080 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2081 } 2082 2083 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 2084 { 2085 lockdep_assert_held(&mvm->mutex); 2086 2087 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2088 } 2089 2090 /* 2091 * Send the add station command for the vif's broadcast station. 2092 * Assumes that the station was already allocated. 2093 * 2094 * @mvm: the mvm component 2095 * @vif: the interface to which the broadcast station is added 2096 * @bsta: the broadcast station to add. 2097 */ 2098 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2099 { 2100 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2101 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2102 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2103 const u8 *baddr = _baddr; 2104 int queue; 2105 int ret; 2106 unsigned int wdg_timeout = 2107 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2108 struct iwl_trans_txq_scd_cfg cfg = { 2109 .fifo = IWL_MVM_TX_FIFO_VO, 2110 .sta_id = mvmvif->bcast_sta.sta_id, 2111 .tid = IWL_MAX_TID_COUNT, 2112 .aggregate = false, 2113 .frame_limit = IWL_FRAME_LIMIT, 2114 }; 2115 2116 lockdep_assert_held(&mvm->mutex); 2117 2118 if (!iwl_mvm_has_new_tx_api(mvm)) { 2119 if (vif->type == NL80211_IFTYPE_AP || 2120 vif->type == NL80211_IFTYPE_ADHOC) { 2121 queue = mvm->probe_queue; 2122 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2123 queue = mvm->p2p_dev_queue; 2124 } else { 2125 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2126 return -EINVAL; 2127 } 2128 2129 bsta->tfd_queue_msk |= BIT(queue); 2130 2131 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2132 } 2133 2134 if (vif->type == NL80211_IFTYPE_ADHOC) 2135 baddr = vif->bss_conf.bssid; 2136 2137 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2138 return -ENOSPC; 2139 2140 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2141 mvmvif->id, mvmvif->color); 2142 if (ret) 2143 return ret; 2144 2145 /* 2146 * For 22000 firmware and on we cannot add queue to a station unknown 2147 * to firmware so enable queue here - after the station was added 2148 */ 2149 if (iwl_mvm_has_new_tx_api(mvm)) { 2150 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2151 IWL_MAX_TID_COUNT, 2152 wdg_timeout); 2153 if (queue < 0) { 2154 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2155 return queue; 2156 } 2157 2158 if (vif->type == NL80211_IFTYPE_AP || 2159 vif->type == NL80211_IFTYPE_ADHOC) 2160 mvm->probe_queue = queue; 2161 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2162 mvm->p2p_dev_queue = queue; 2163 } 2164 2165 return 0; 2166 } 2167 2168 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2169 struct ieee80211_vif *vif) 2170 { 2171 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2172 int queue; 2173 2174 lockdep_assert_held(&mvm->mutex); 2175 2176 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2177 2178 switch (vif->type) { 2179 case NL80211_IFTYPE_AP: 2180 case NL80211_IFTYPE_ADHOC: 2181 queue = mvm->probe_queue; 2182 break; 2183 case NL80211_IFTYPE_P2P_DEVICE: 2184 queue = mvm->p2p_dev_queue; 2185 break; 2186 default: 2187 WARN(1, "Can't free bcast queue on vif type %d\n", 2188 vif->type); 2189 return; 2190 } 2191 2192 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2193 if (iwl_mvm_has_new_tx_api(mvm)) 2194 return; 2195 2196 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2197 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2198 } 2199 2200 /* Send the FW a request to remove the station from it's internal data 2201 * structures, but DO NOT remove the entry from the local data structures. */ 2202 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2203 { 2204 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2205 int ret; 2206 2207 lockdep_assert_held(&mvm->mutex); 2208 2209 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2210 2211 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2212 if (ret) 2213 IWL_WARN(mvm, "Failed sending remove station\n"); 2214 return ret; 2215 } 2216 2217 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2218 { 2219 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2220 2221 lockdep_assert_held(&mvm->mutex); 2222 2223 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2224 ieee80211_vif_type_p2p(vif), 2225 IWL_STA_GENERAL_PURPOSE); 2226 } 2227 2228 /* Allocate a new station entry for the broadcast station to the given vif, 2229 * and send it to the FW. 2230 * Note that each P2P mac should have its own broadcast station. 2231 * 2232 * @mvm: the mvm component 2233 * @vif: the interface to which the broadcast station is added 2234 * @bsta: the broadcast station to add. */ 2235 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2236 { 2237 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2238 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2239 int ret; 2240 2241 lockdep_assert_held(&mvm->mutex); 2242 2243 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2244 if (ret) 2245 return ret; 2246 2247 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2248 2249 if (ret) 2250 iwl_mvm_dealloc_int_sta(mvm, bsta); 2251 2252 return ret; 2253 } 2254 2255 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2256 { 2257 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2258 2259 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2260 } 2261 2262 /* 2263 * Send the FW a request to remove the station from it's internal data 2264 * structures, and in addition remove it from the local data structure. 2265 */ 2266 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2267 { 2268 int ret; 2269 2270 lockdep_assert_held(&mvm->mutex); 2271 2272 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2273 2274 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2275 2276 return ret; 2277 } 2278 2279 /* 2280 * Allocate a new station entry for the multicast station to the given vif, 2281 * and send it to the FW. 2282 * Note that each AP/GO mac should have its own multicast station. 2283 * 2284 * @mvm: the mvm component 2285 * @vif: the interface to which the multicast station is added 2286 */ 2287 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2288 { 2289 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2290 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2291 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2292 const u8 *maddr = _maddr; 2293 struct iwl_trans_txq_scd_cfg cfg = { 2294 .fifo = vif->type == NL80211_IFTYPE_AP ? 2295 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2296 .sta_id = msta->sta_id, 2297 .tid = 0, 2298 .aggregate = false, 2299 .frame_limit = IWL_FRAME_LIMIT, 2300 }; 2301 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2302 int ret; 2303 2304 lockdep_assert_held(&mvm->mutex); 2305 2306 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2307 vif->type != NL80211_IFTYPE_ADHOC)) 2308 return -ENOTSUPP; 2309 2310 /* 2311 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2312 * invalid, so make sure we use the queue we want. 2313 * Note that this is done here as we want to avoid making DQA 2314 * changes in mac80211 layer. 2315 */ 2316 if (vif->type == NL80211_IFTYPE_ADHOC) 2317 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2318 2319 /* 2320 * While in previous FWs we had to exclude cab queue from TFD queue 2321 * mask, now it is needed as any other queue. 2322 */ 2323 if (!iwl_mvm_has_new_tx_api(mvm) && 2324 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2325 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2326 timeout); 2327 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2328 } 2329 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2330 mvmvif->id, mvmvif->color); 2331 if (ret) 2332 goto err; 2333 2334 /* 2335 * Enable cab queue after the ADD_STA command is sent. 2336 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2337 * command with unknown station id, and for FW that doesn't support 2338 * station API since the cab queue is not included in the 2339 * tfd_queue_mask. 2340 */ 2341 if (iwl_mvm_has_new_tx_api(mvm)) { 2342 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2343 0, 2344 timeout); 2345 if (queue < 0) { 2346 ret = queue; 2347 goto err; 2348 } 2349 mvmvif->cab_queue = queue; 2350 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2351 IWL_UCODE_TLV_API_STA_TYPE)) 2352 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2353 timeout); 2354 2355 return 0; 2356 err: 2357 iwl_mvm_dealloc_int_sta(mvm, msta); 2358 return ret; 2359 } 2360 2361 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2362 struct ieee80211_key_conf *keyconf, 2363 bool mcast) 2364 { 2365 union { 2366 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2367 struct iwl_mvm_add_sta_key_cmd cmd; 2368 } u = {}; 2369 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2370 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2371 __le16 key_flags; 2372 int ret, size; 2373 u32 status; 2374 2375 /* This is a valid situation for GTK removal */ 2376 if (sta_id == IWL_MVM_INVALID_STA) 2377 return 0; 2378 2379 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2380 STA_KEY_FLG_KEYID_MSK); 2381 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2382 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2383 2384 if (mcast) 2385 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2386 2387 /* 2388 * The fields assigned here are in the same location at the start 2389 * of the command, so we can do this union trick. 2390 */ 2391 u.cmd.common.key_flags = key_flags; 2392 u.cmd.common.key_offset = keyconf->hw_key_idx; 2393 u.cmd.common.sta_id = sta_id; 2394 2395 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2396 2397 status = ADD_STA_SUCCESS; 2398 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2399 &status); 2400 2401 switch (status) { 2402 case ADD_STA_SUCCESS: 2403 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2404 break; 2405 default: 2406 ret = -EIO; 2407 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2408 break; 2409 } 2410 2411 return ret; 2412 } 2413 2414 /* 2415 * Send the FW a request to remove the station from it's internal data 2416 * structures, and in addition remove it from the local data structure. 2417 */ 2418 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2419 { 2420 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2421 int ret; 2422 2423 lockdep_assert_held(&mvm->mutex); 2424 2425 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2426 2427 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2428 2429 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2430 if (ret) 2431 IWL_WARN(mvm, "Failed sending remove station\n"); 2432 2433 return ret; 2434 } 2435 2436 #define IWL_MAX_RX_BA_SESSIONS 16 2437 2438 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2439 { 2440 struct iwl_mvm_rss_sync_notif notif = { 2441 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2442 .metadata.sync = 1, 2443 .delba.baid = baid, 2444 }; 2445 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2446 }; 2447 2448 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2449 struct iwl_mvm_baid_data *data) 2450 { 2451 int i; 2452 2453 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2454 2455 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2456 int j; 2457 struct iwl_mvm_reorder_buffer *reorder_buf = 2458 &data->reorder_buf[i]; 2459 struct iwl_mvm_reorder_buf_entry *entries = 2460 &data->entries[i * data->entries_per_queue]; 2461 2462 spin_lock_bh(&reorder_buf->lock); 2463 if (likely(!reorder_buf->num_stored)) { 2464 spin_unlock_bh(&reorder_buf->lock); 2465 continue; 2466 } 2467 2468 /* 2469 * This shouldn't happen in regular DELBA since the internal 2470 * delBA notification should trigger a release of all frames in 2471 * the reorder buffer. 2472 */ 2473 WARN_ON(1); 2474 2475 for (j = 0; j < reorder_buf->buf_size; j++) 2476 __skb_queue_purge(&entries[j].e.frames); 2477 /* 2478 * Prevent timer re-arm. This prevents a very far fetched case 2479 * where we timed out on the notification. There may be prior 2480 * RX frames pending in the RX queue before the notification 2481 * that might get processed between now and the actual deletion 2482 * and we would re-arm the timer although we are deleting the 2483 * reorder buffer. 2484 */ 2485 reorder_buf->removed = true; 2486 spin_unlock_bh(&reorder_buf->lock); 2487 del_timer_sync(&reorder_buf->reorder_timer); 2488 } 2489 } 2490 2491 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2492 struct iwl_mvm_baid_data *data, 2493 u16 ssn, u16 buf_size) 2494 { 2495 int i; 2496 2497 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2498 struct iwl_mvm_reorder_buffer *reorder_buf = 2499 &data->reorder_buf[i]; 2500 struct iwl_mvm_reorder_buf_entry *entries = 2501 &data->entries[i * data->entries_per_queue]; 2502 int j; 2503 2504 reorder_buf->num_stored = 0; 2505 reorder_buf->head_sn = ssn; 2506 reorder_buf->buf_size = buf_size; 2507 /* rx reorder timer */ 2508 timer_setup(&reorder_buf->reorder_timer, 2509 iwl_mvm_reorder_timer_expired, 0); 2510 spin_lock_init(&reorder_buf->lock); 2511 reorder_buf->mvm = mvm; 2512 reorder_buf->queue = i; 2513 reorder_buf->valid = false; 2514 for (j = 0; j < reorder_buf->buf_size; j++) 2515 __skb_queue_head_init(&entries[j].e.frames); 2516 } 2517 } 2518 2519 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2520 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2521 { 2522 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2523 struct iwl_mvm_add_sta_cmd cmd = {}; 2524 struct iwl_mvm_baid_data *baid_data = NULL; 2525 int ret; 2526 u32 status; 2527 2528 lockdep_assert_held(&mvm->mutex); 2529 2530 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2531 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2532 return -ENOSPC; 2533 } 2534 2535 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2536 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2537 2538 /* sparse doesn't like the __align() so don't check */ 2539 #ifndef __CHECKER__ 2540 /* 2541 * The division below will be OK if either the cache line size 2542 * can be divided by the entry size (ALIGN will round up) or if 2543 * if the entry size can be divided by the cache line size, in 2544 * which case the ALIGN() will do nothing. 2545 */ 2546 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2547 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2548 #endif 2549 2550 /* 2551 * Upward align the reorder buffer size to fill an entire cache 2552 * line for each queue, to avoid sharing cache lines between 2553 * different queues. 2554 */ 2555 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2556 2557 /* 2558 * Allocate here so if allocation fails we can bail out early 2559 * before starting the BA session in the firmware 2560 */ 2561 baid_data = kzalloc(sizeof(*baid_data) + 2562 mvm->trans->num_rx_queues * 2563 reorder_buf_size, 2564 GFP_KERNEL); 2565 if (!baid_data) 2566 return -ENOMEM; 2567 2568 /* 2569 * This division is why we need the above BUILD_BUG_ON(), 2570 * if that doesn't hold then this will not be right. 2571 */ 2572 baid_data->entries_per_queue = 2573 reorder_buf_size / sizeof(baid_data->entries[0]); 2574 } 2575 2576 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2577 cmd.sta_id = mvm_sta->sta_id; 2578 cmd.add_modify = STA_MODE_MODIFY; 2579 if (start) { 2580 cmd.add_immediate_ba_tid = (u8) tid; 2581 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2582 cmd.rx_ba_window = cpu_to_le16(buf_size); 2583 } else { 2584 cmd.remove_immediate_ba_tid = (u8) tid; 2585 } 2586 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2587 STA_MODIFY_REMOVE_BA_TID; 2588 2589 status = ADD_STA_SUCCESS; 2590 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2591 iwl_mvm_add_sta_cmd_size(mvm), 2592 &cmd, &status); 2593 if (ret) 2594 goto out_free; 2595 2596 switch (status & IWL_ADD_STA_STATUS_MASK) { 2597 case ADD_STA_SUCCESS: 2598 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2599 start ? "start" : "stopp"); 2600 break; 2601 case ADD_STA_IMMEDIATE_BA_FAILURE: 2602 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2603 ret = -ENOSPC; 2604 break; 2605 default: 2606 ret = -EIO; 2607 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2608 start ? "start" : "stopp", status); 2609 break; 2610 } 2611 2612 if (ret) 2613 goto out_free; 2614 2615 if (start) { 2616 u8 baid; 2617 2618 mvm->rx_ba_sessions++; 2619 2620 if (!iwl_mvm_has_new_rx_api(mvm)) 2621 return 0; 2622 2623 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2624 ret = -EINVAL; 2625 goto out_free; 2626 } 2627 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2628 IWL_ADD_STA_BAID_SHIFT); 2629 baid_data->baid = baid; 2630 baid_data->timeout = timeout; 2631 baid_data->last_rx = jiffies; 2632 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2633 timer_setup(&baid_data->session_timer, 2634 iwl_mvm_rx_agg_session_expired, 0); 2635 baid_data->mvm = mvm; 2636 baid_data->tid = tid; 2637 baid_data->sta_id = mvm_sta->sta_id; 2638 2639 mvm_sta->tid_to_baid[tid] = baid; 2640 if (timeout) 2641 mod_timer(&baid_data->session_timer, 2642 TU_TO_EXP_TIME(timeout * 2)); 2643 2644 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2645 /* 2646 * protect the BA data with RCU to cover a case where our 2647 * internal RX sync mechanism will timeout (not that it's 2648 * supposed to happen) and we will free the session data while 2649 * RX is being processed in parallel 2650 */ 2651 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2652 mvm_sta->sta_id, tid, baid); 2653 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2654 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2655 } else { 2656 u8 baid = mvm_sta->tid_to_baid[tid]; 2657 2658 if (mvm->rx_ba_sessions > 0) 2659 /* check that restart flow didn't zero the counter */ 2660 mvm->rx_ba_sessions--; 2661 if (!iwl_mvm_has_new_rx_api(mvm)) 2662 return 0; 2663 2664 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2665 return -EINVAL; 2666 2667 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2668 if (WARN_ON(!baid_data)) 2669 return -EINVAL; 2670 2671 /* synchronize all rx queues so we can safely delete */ 2672 iwl_mvm_free_reorder(mvm, baid_data); 2673 del_timer_sync(&baid_data->session_timer); 2674 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2675 kfree_rcu(baid_data, rcu_head); 2676 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2677 } 2678 return 0; 2679 2680 out_free: 2681 kfree(baid_data); 2682 return ret; 2683 } 2684 2685 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2686 int tid, u8 queue, bool start) 2687 { 2688 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2689 struct iwl_mvm_add_sta_cmd cmd = {}; 2690 int ret; 2691 u32 status; 2692 2693 lockdep_assert_held(&mvm->mutex); 2694 2695 if (start) { 2696 mvm_sta->tfd_queue_msk |= BIT(queue); 2697 mvm_sta->tid_disable_agg &= ~BIT(tid); 2698 } else { 2699 /* In DQA-mode the queue isn't removed on agg termination */ 2700 mvm_sta->tid_disable_agg |= BIT(tid); 2701 } 2702 2703 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2704 cmd.sta_id = mvm_sta->sta_id; 2705 cmd.add_modify = STA_MODE_MODIFY; 2706 if (!iwl_mvm_has_new_tx_api(mvm)) 2707 cmd.modify_mask = STA_MODIFY_QUEUES; 2708 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2709 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2710 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2711 2712 status = ADD_STA_SUCCESS; 2713 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2714 iwl_mvm_add_sta_cmd_size(mvm), 2715 &cmd, &status); 2716 if (ret) 2717 return ret; 2718 2719 switch (status & IWL_ADD_STA_STATUS_MASK) { 2720 case ADD_STA_SUCCESS: 2721 break; 2722 default: 2723 ret = -EIO; 2724 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2725 start ? "start" : "stopp", status); 2726 break; 2727 } 2728 2729 return ret; 2730 } 2731 2732 const u8 tid_to_mac80211_ac[] = { 2733 IEEE80211_AC_BE, 2734 IEEE80211_AC_BK, 2735 IEEE80211_AC_BK, 2736 IEEE80211_AC_BE, 2737 IEEE80211_AC_VI, 2738 IEEE80211_AC_VI, 2739 IEEE80211_AC_VO, 2740 IEEE80211_AC_VO, 2741 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2742 }; 2743 2744 static const u8 tid_to_ucode_ac[] = { 2745 AC_BE, 2746 AC_BK, 2747 AC_BK, 2748 AC_BE, 2749 AC_VI, 2750 AC_VI, 2751 AC_VO, 2752 AC_VO, 2753 }; 2754 2755 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2756 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2757 { 2758 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2759 struct iwl_mvm_tid_data *tid_data; 2760 u16 normalized_ssn; 2761 u16 txq_id; 2762 int ret; 2763 2764 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2765 return -EINVAL; 2766 2767 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2768 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2769 IWL_ERR(mvm, 2770 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2771 mvmsta->tid_data[tid].state); 2772 return -ENXIO; 2773 } 2774 2775 lockdep_assert_held(&mvm->mutex); 2776 2777 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2778 iwl_mvm_has_new_tx_api(mvm)) { 2779 u8 ac = tid_to_mac80211_ac[tid]; 2780 2781 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2782 if (ret) 2783 return ret; 2784 } 2785 2786 spin_lock_bh(&mvmsta->lock); 2787 2788 /* 2789 * Note the possible cases: 2790 * 1. An enabled TXQ - TXQ needs to become agg'ed 2791 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2792 * it as reserved 2793 */ 2794 txq_id = mvmsta->tid_data[tid].txq_id; 2795 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2796 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2797 IWL_MVM_DQA_MIN_DATA_QUEUE, 2798 IWL_MVM_DQA_MAX_DATA_QUEUE); 2799 if (ret < 0) { 2800 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2801 goto out; 2802 } 2803 2804 txq_id = ret; 2805 2806 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2807 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2808 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2809 ret = -ENXIO; 2810 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2811 tid, IWL_MAX_HW_QUEUES - 1); 2812 goto out; 2813 2814 } else if (unlikely(mvm->queue_info[txq_id].status == 2815 IWL_MVM_QUEUE_SHARED)) { 2816 ret = -ENXIO; 2817 IWL_DEBUG_TX_QUEUES(mvm, 2818 "Can't start tid %d agg on shared queue!\n", 2819 tid); 2820 goto out; 2821 } 2822 2823 IWL_DEBUG_TX_QUEUES(mvm, 2824 "AGG for tid %d will be on queue #%d\n", 2825 tid, txq_id); 2826 2827 tid_data = &mvmsta->tid_data[tid]; 2828 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2829 tid_data->txq_id = txq_id; 2830 *ssn = tid_data->ssn; 2831 2832 IWL_DEBUG_TX_QUEUES(mvm, 2833 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2834 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2835 tid_data->next_reclaimed); 2836 2837 /* 2838 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2839 * to align the wrap around of ssn so we compare relevant values. 2840 */ 2841 normalized_ssn = tid_data->ssn; 2842 if (mvm->trans->trans_cfg->gen2) 2843 normalized_ssn &= 0xff; 2844 2845 if (normalized_ssn == tid_data->next_reclaimed) { 2846 tid_data->state = IWL_AGG_STARTING; 2847 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2848 } else { 2849 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2850 ret = 0; 2851 } 2852 2853 out: 2854 spin_unlock_bh(&mvmsta->lock); 2855 2856 return ret; 2857 } 2858 2859 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2860 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2861 bool amsdu) 2862 { 2863 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2864 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2865 unsigned int wdg_timeout = 2866 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2867 int queue, ret; 2868 bool alloc_queue = true; 2869 enum iwl_mvm_queue_status queue_status; 2870 u16 ssn; 2871 2872 struct iwl_trans_txq_scd_cfg cfg = { 2873 .sta_id = mvmsta->sta_id, 2874 .tid = tid, 2875 .frame_limit = buf_size, 2876 .aggregate = true, 2877 }; 2878 2879 /* 2880 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2881 * manager, so this function should never be called in this case. 2882 */ 2883 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2884 return -EINVAL; 2885 2886 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2887 != IWL_MAX_TID_COUNT); 2888 2889 spin_lock_bh(&mvmsta->lock); 2890 ssn = tid_data->ssn; 2891 queue = tid_data->txq_id; 2892 tid_data->state = IWL_AGG_ON; 2893 mvmsta->agg_tids |= BIT(tid); 2894 tid_data->ssn = 0xffff; 2895 tid_data->amsdu_in_ampdu_allowed = amsdu; 2896 spin_unlock_bh(&mvmsta->lock); 2897 2898 if (iwl_mvm_has_new_tx_api(mvm)) { 2899 /* 2900 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2901 * would have failed, so if we are here there is no need to 2902 * allocate a queue. 2903 * However, if aggregation size is different than the default 2904 * size, the scheduler should be reconfigured. 2905 * We cannot do this with the new TX API, so return unsupported 2906 * for now, until it will be offloaded to firmware.. 2907 * Note that if SCD default value changes - this condition 2908 * should be updated as well. 2909 */ 2910 if (buf_size < IWL_FRAME_LIMIT) 2911 return -ENOTSUPP; 2912 2913 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2914 if (ret) 2915 return -EIO; 2916 goto out; 2917 } 2918 2919 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2920 2921 queue_status = mvm->queue_info[queue].status; 2922 2923 /* Maybe there is no need to even alloc a queue... */ 2924 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2925 alloc_queue = false; 2926 2927 /* 2928 * Only reconfig the SCD for the queue if the window size has 2929 * changed from current (become smaller) 2930 */ 2931 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2932 /* 2933 * If reconfiguring an existing queue, it first must be 2934 * drained 2935 */ 2936 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2937 BIT(queue)); 2938 if (ret) { 2939 IWL_ERR(mvm, 2940 "Error draining queue before reconfig\n"); 2941 return ret; 2942 } 2943 2944 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2945 mvmsta->sta_id, tid, 2946 buf_size, ssn); 2947 if (ret) { 2948 IWL_ERR(mvm, 2949 "Error reconfiguring TXQ #%d\n", queue); 2950 return ret; 2951 } 2952 } 2953 2954 if (alloc_queue) 2955 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2956 &cfg, wdg_timeout); 2957 2958 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2959 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2960 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2961 if (ret) 2962 return -EIO; 2963 } 2964 2965 /* No need to mark as reserved */ 2966 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2967 2968 out: 2969 /* 2970 * Even though in theory the peer could have different 2971 * aggregation reorder buffer sizes for different sessions, 2972 * our ucode doesn't allow for that and has a global limit 2973 * for each station. Therefore, use the minimum of all the 2974 * aggregation sessions and our default value. 2975 */ 2976 mvmsta->max_agg_bufsize = 2977 min(mvmsta->max_agg_bufsize, buf_size); 2978 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2979 2980 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2981 sta->addr, tid); 2982 2983 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 2984 } 2985 2986 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2987 struct iwl_mvm_sta *mvmsta, 2988 struct iwl_mvm_tid_data *tid_data) 2989 { 2990 u16 txq_id = tid_data->txq_id; 2991 2992 lockdep_assert_held(&mvm->mutex); 2993 2994 if (iwl_mvm_has_new_tx_api(mvm)) 2995 return; 2996 2997 /* 2998 * The TXQ is marked as reserved only if no traffic came through yet 2999 * This means no traffic has been sent on this TID (agg'd or not), so 3000 * we no longer have use for the queue. Since it hasn't even been 3001 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3002 * free. 3003 */ 3004 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3005 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3006 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3007 } 3008 } 3009 3010 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3011 struct ieee80211_sta *sta, u16 tid) 3012 { 3013 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3014 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3015 u16 txq_id; 3016 int err; 3017 3018 /* 3019 * If mac80211 is cleaning its state, then say that we finished since 3020 * our state has been cleared anyway. 3021 */ 3022 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3023 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3024 return 0; 3025 } 3026 3027 spin_lock_bh(&mvmsta->lock); 3028 3029 txq_id = tid_data->txq_id; 3030 3031 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3032 mvmsta->sta_id, tid, txq_id, tid_data->state); 3033 3034 mvmsta->agg_tids &= ~BIT(tid); 3035 3036 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3037 3038 switch (tid_data->state) { 3039 case IWL_AGG_ON: 3040 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3041 3042 IWL_DEBUG_TX_QUEUES(mvm, 3043 "ssn = %d, next_recl = %d\n", 3044 tid_data->ssn, tid_data->next_reclaimed); 3045 3046 tid_data->ssn = 0xffff; 3047 tid_data->state = IWL_AGG_OFF; 3048 spin_unlock_bh(&mvmsta->lock); 3049 3050 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3051 3052 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3053 return 0; 3054 case IWL_AGG_STARTING: 3055 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3056 /* 3057 * The agg session has been stopped before it was set up. This 3058 * can happen when the AddBA timer times out for example. 3059 */ 3060 3061 /* No barriers since we are under mutex */ 3062 lockdep_assert_held(&mvm->mutex); 3063 3064 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3065 tid_data->state = IWL_AGG_OFF; 3066 err = 0; 3067 break; 3068 default: 3069 IWL_ERR(mvm, 3070 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3071 mvmsta->sta_id, tid, tid_data->state); 3072 IWL_ERR(mvm, 3073 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3074 err = -EINVAL; 3075 } 3076 3077 spin_unlock_bh(&mvmsta->lock); 3078 3079 return err; 3080 } 3081 3082 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3083 struct ieee80211_sta *sta, u16 tid) 3084 { 3085 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3086 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3087 u16 txq_id; 3088 enum iwl_mvm_agg_state old_state; 3089 3090 /* 3091 * First set the agg state to OFF to avoid calling 3092 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3093 */ 3094 spin_lock_bh(&mvmsta->lock); 3095 txq_id = tid_data->txq_id; 3096 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3097 mvmsta->sta_id, tid, txq_id, tid_data->state); 3098 old_state = tid_data->state; 3099 tid_data->state = IWL_AGG_OFF; 3100 mvmsta->agg_tids &= ~BIT(tid); 3101 spin_unlock_bh(&mvmsta->lock); 3102 3103 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3104 3105 if (old_state >= IWL_AGG_ON) { 3106 iwl_mvm_drain_sta(mvm, mvmsta, true); 3107 3108 if (iwl_mvm_has_new_tx_api(mvm)) { 3109 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3110 BIT(tid), 0)) 3111 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3112 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3113 } else { 3114 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3115 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3116 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3117 } 3118 3119 iwl_mvm_drain_sta(mvm, mvmsta, false); 3120 3121 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3122 } 3123 3124 return 0; 3125 } 3126 3127 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3128 { 3129 int i, max = -1, max_offs = -1; 3130 3131 lockdep_assert_held(&mvm->mutex); 3132 3133 /* Pick the unused key offset with the highest 'deleted' 3134 * counter. Every time a key is deleted, all the counters 3135 * are incremented and the one that was just deleted is 3136 * reset to zero. Thus, the highest counter is the one 3137 * that was deleted longest ago. Pick that one. 3138 */ 3139 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3140 if (test_bit(i, mvm->fw_key_table)) 3141 continue; 3142 if (mvm->fw_key_deleted[i] > max) { 3143 max = mvm->fw_key_deleted[i]; 3144 max_offs = i; 3145 } 3146 } 3147 3148 if (max_offs < 0) 3149 return STA_KEY_IDX_INVALID; 3150 3151 return max_offs; 3152 } 3153 3154 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3155 struct ieee80211_vif *vif, 3156 struct ieee80211_sta *sta) 3157 { 3158 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3159 3160 if (sta) 3161 return iwl_mvm_sta_from_mac80211(sta); 3162 3163 /* 3164 * The device expects GTKs for station interfaces to be 3165 * installed as GTKs for the AP station. If we have no 3166 * station ID, then use AP's station ID. 3167 */ 3168 if (vif->type == NL80211_IFTYPE_STATION && 3169 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3170 u8 sta_id = mvmvif->ap_sta_id; 3171 3172 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3173 lockdep_is_held(&mvm->mutex)); 3174 3175 /* 3176 * It is possible that the 'sta' parameter is NULL, 3177 * for example when a GTK is removed - the sta_id will then 3178 * be the AP ID, and no station was passed by mac80211. 3179 */ 3180 if (IS_ERR_OR_NULL(sta)) 3181 return NULL; 3182 3183 return iwl_mvm_sta_from_mac80211(sta); 3184 } 3185 3186 return NULL; 3187 } 3188 3189 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3190 u32 sta_id, 3191 struct ieee80211_key_conf *key, bool mcast, 3192 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3193 u8 key_offset, bool mfp) 3194 { 3195 union { 3196 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3197 struct iwl_mvm_add_sta_key_cmd cmd; 3198 } u = {}; 3199 __le16 key_flags; 3200 int ret; 3201 u32 status; 3202 u16 keyidx; 3203 u64 pn = 0; 3204 int i, size; 3205 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3206 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3207 3208 if (sta_id == IWL_MVM_INVALID_STA) 3209 return -EINVAL; 3210 3211 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3212 STA_KEY_FLG_KEYID_MSK; 3213 key_flags = cpu_to_le16(keyidx); 3214 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3215 3216 switch (key->cipher) { 3217 case WLAN_CIPHER_SUITE_TKIP: 3218 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3219 if (new_api) { 3220 memcpy((void *)&u.cmd.tx_mic_key, 3221 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3222 IWL_MIC_KEY_SIZE); 3223 3224 memcpy((void *)&u.cmd.rx_mic_key, 3225 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3226 IWL_MIC_KEY_SIZE); 3227 pn = atomic64_read(&key->tx_pn); 3228 3229 } else { 3230 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3231 for (i = 0; i < 5; i++) 3232 u.cmd_v1.tkip_rx_ttak[i] = 3233 cpu_to_le16(tkip_p1k[i]); 3234 } 3235 memcpy(u.cmd.common.key, key->key, key->keylen); 3236 break; 3237 case WLAN_CIPHER_SUITE_CCMP: 3238 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3239 memcpy(u.cmd.common.key, key->key, key->keylen); 3240 if (new_api) 3241 pn = atomic64_read(&key->tx_pn); 3242 break; 3243 case WLAN_CIPHER_SUITE_WEP104: 3244 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3245 /* fall through */ 3246 case WLAN_CIPHER_SUITE_WEP40: 3247 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3248 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3249 break; 3250 case WLAN_CIPHER_SUITE_GCMP_256: 3251 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3252 /* fall through */ 3253 case WLAN_CIPHER_SUITE_GCMP: 3254 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3255 memcpy(u.cmd.common.key, key->key, key->keylen); 3256 if (new_api) 3257 pn = atomic64_read(&key->tx_pn); 3258 break; 3259 default: 3260 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3261 memcpy(u.cmd.common.key, key->key, key->keylen); 3262 } 3263 3264 if (mcast) 3265 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3266 if (mfp) 3267 key_flags |= cpu_to_le16(STA_KEY_MFP); 3268 3269 u.cmd.common.key_offset = key_offset; 3270 u.cmd.common.key_flags = key_flags; 3271 u.cmd.common.sta_id = sta_id; 3272 3273 if (new_api) { 3274 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3275 size = sizeof(u.cmd); 3276 } else { 3277 size = sizeof(u.cmd_v1); 3278 } 3279 3280 status = ADD_STA_SUCCESS; 3281 if (cmd_flags & CMD_ASYNC) 3282 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3283 &u.cmd); 3284 else 3285 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3286 &u.cmd, &status); 3287 3288 switch (status) { 3289 case ADD_STA_SUCCESS: 3290 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3291 break; 3292 default: 3293 ret = -EIO; 3294 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3295 break; 3296 } 3297 3298 return ret; 3299 } 3300 3301 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3302 struct ieee80211_key_conf *keyconf, 3303 u8 sta_id, bool remove_key) 3304 { 3305 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3306 3307 /* verify the key details match the required command's expectations */ 3308 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3309 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3310 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3311 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3312 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3313 return -EINVAL; 3314 3315 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3316 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3317 return -EINVAL; 3318 3319 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3320 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3321 3322 if (remove_key) { 3323 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3324 } else { 3325 struct ieee80211_key_seq seq; 3326 const u8 *pn; 3327 3328 switch (keyconf->cipher) { 3329 case WLAN_CIPHER_SUITE_AES_CMAC: 3330 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3331 break; 3332 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3333 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3334 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3335 break; 3336 default: 3337 return -EINVAL; 3338 } 3339 3340 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3341 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3342 igtk_cmd.ctrl_flags |= 3343 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3344 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3345 pn = seq.aes_cmac.pn; 3346 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3347 ((u64) pn[4] << 8) | 3348 ((u64) pn[3] << 16) | 3349 ((u64) pn[2] << 24) | 3350 ((u64) pn[1] << 32) | 3351 ((u64) pn[0] << 40)); 3352 } 3353 3354 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3355 remove_key ? "removing" : "installing", 3356 igtk_cmd.sta_id); 3357 3358 if (!iwl_mvm_has_new_rx_api(mvm)) { 3359 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3360 .ctrl_flags = igtk_cmd.ctrl_flags, 3361 .key_id = igtk_cmd.key_id, 3362 .sta_id = igtk_cmd.sta_id, 3363 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3364 }; 3365 3366 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3367 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3368 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3369 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3370 } 3371 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3372 sizeof(igtk_cmd), &igtk_cmd); 3373 } 3374 3375 3376 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3377 struct ieee80211_vif *vif, 3378 struct ieee80211_sta *sta) 3379 { 3380 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3381 3382 if (sta) 3383 return sta->addr; 3384 3385 if (vif->type == NL80211_IFTYPE_STATION && 3386 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3387 u8 sta_id = mvmvif->ap_sta_id; 3388 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3389 lockdep_is_held(&mvm->mutex)); 3390 return sta->addr; 3391 } 3392 3393 3394 return NULL; 3395 } 3396 3397 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3398 struct ieee80211_vif *vif, 3399 struct ieee80211_sta *sta, 3400 struct ieee80211_key_conf *keyconf, 3401 u8 key_offset, 3402 bool mcast) 3403 { 3404 int ret; 3405 const u8 *addr; 3406 struct ieee80211_key_seq seq; 3407 u16 p1k[5]; 3408 u32 sta_id; 3409 bool mfp = false; 3410 3411 if (sta) { 3412 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3413 3414 sta_id = mvm_sta->sta_id; 3415 mfp = sta->mfp; 3416 } else if (vif->type == NL80211_IFTYPE_AP && 3417 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3418 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3419 3420 sta_id = mvmvif->mcast_sta.sta_id; 3421 } else { 3422 IWL_ERR(mvm, "Failed to find station id\n"); 3423 return -EINVAL; 3424 } 3425 3426 switch (keyconf->cipher) { 3427 case WLAN_CIPHER_SUITE_TKIP: 3428 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3429 /* get phase 1 key from mac80211 */ 3430 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3431 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3432 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3433 seq.tkip.iv32, p1k, 0, key_offset, 3434 mfp); 3435 break; 3436 case WLAN_CIPHER_SUITE_CCMP: 3437 case WLAN_CIPHER_SUITE_WEP40: 3438 case WLAN_CIPHER_SUITE_WEP104: 3439 case WLAN_CIPHER_SUITE_GCMP: 3440 case WLAN_CIPHER_SUITE_GCMP_256: 3441 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3442 0, NULL, 0, key_offset, mfp); 3443 break; 3444 default: 3445 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3446 0, NULL, 0, key_offset, mfp); 3447 } 3448 3449 return ret; 3450 } 3451 3452 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3453 struct ieee80211_vif *vif, 3454 struct ieee80211_sta *sta, 3455 struct ieee80211_key_conf *keyconf, 3456 u8 key_offset) 3457 { 3458 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3459 struct iwl_mvm_sta *mvm_sta; 3460 u8 sta_id = IWL_MVM_INVALID_STA; 3461 int ret; 3462 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3463 3464 lockdep_assert_held(&mvm->mutex); 3465 3466 if (vif->type != NL80211_IFTYPE_AP || 3467 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3468 /* Get the station id from the mvm local station table */ 3469 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3470 if (!mvm_sta) { 3471 IWL_ERR(mvm, "Failed to find station\n"); 3472 return -EINVAL; 3473 } 3474 sta_id = mvm_sta->sta_id; 3475 3476 /* 3477 * It is possible that the 'sta' parameter is NULL, and thus 3478 * there is a need to retrieve the sta from the local station 3479 * table. 3480 */ 3481 if (!sta) { 3482 sta = rcu_dereference_protected( 3483 mvm->fw_id_to_mac_id[sta_id], 3484 lockdep_is_held(&mvm->mutex)); 3485 if (IS_ERR_OR_NULL(sta)) { 3486 IWL_ERR(mvm, "Invalid station id\n"); 3487 return -EINVAL; 3488 } 3489 } 3490 3491 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3492 return -EINVAL; 3493 } else { 3494 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3495 3496 sta_id = mvmvif->mcast_sta.sta_id; 3497 } 3498 3499 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3500 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3501 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3502 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3503 goto end; 3504 } 3505 3506 /* If the key_offset is not pre-assigned, we need to find a 3507 * new offset to use. In normal cases, the offset is not 3508 * pre-assigned, but during HW_RESTART we want to reuse the 3509 * same indices, so we pass them when this function is called. 3510 * 3511 * In D3 entry, we need to hardcoded the indices (because the 3512 * firmware hardcodes the PTK offset to 0). In this case, we 3513 * need to make sure we don't overwrite the hw_key_idx in the 3514 * keyconf structure, because otherwise we cannot configure 3515 * the original ones back when resuming. 3516 */ 3517 if (key_offset == STA_KEY_IDX_INVALID) { 3518 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3519 if (key_offset == STA_KEY_IDX_INVALID) 3520 return -ENOSPC; 3521 keyconf->hw_key_idx = key_offset; 3522 } 3523 3524 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3525 if (ret) 3526 goto end; 3527 3528 /* 3529 * For WEP, the same key is used for multicast and unicast. Upload it 3530 * again, using the same key offset, and now pointing the other one 3531 * to the same key slot (offset). 3532 * If this fails, remove the original as well. 3533 */ 3534 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3535 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3536 sta) { 3537 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3538 key_offset, !mcast); 3539 if (ret) { 3540 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3541 goto end; 3542 } 3543 } 3544 3545 __set_bit(key_offset, mvm->fw_key_table); 3546 3547 end: 3548 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3549 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3550 sta ? sta->addr : zero_addr, ret); 3551 return ret; 3552 } 3553 3554 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3555 struct ieee80211_vif *vif, 3556 struct ieee80211_sta *sta, 3557 struct ieee80211_key_conf *keyconf) 3558 { 3559 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3560 struct iwl_mvm_sta *mvm_sta; 3561 u8 sta_id = IWL_MVM_INVALID_STA; 3562 int ret, i; 3563 3564 lockdep_assert_held(&mvm->mutex); 3565 3566 /* Get the station from the mvm local station table */ 3567 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3568 if (mvm_sta) 3569 sta_id = mvm_sta->sta_id; 3570 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3571 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3572 3573 3574 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3575 keyconf->keyidx, sta_id); 3576 3577 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3578 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3579 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3580 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3581 3582 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3583 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3584 keyconf->hw_key_idx); 3585 return -ENOENT; 3586 } 3587 3588 /* track which key was deleted last */ 3589 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3590 if (mvm->fw_key_deleted[i] < U8_MAX) 3591 mvm->fw_key_deleted[i]++; 3592 } 3593 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3594 3595 if (sta && !mvm_sta) { 3596 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3597 return 0; 3598 } 3599 3600 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3601 if (ret) 3602 return ret; 3603 3604 /* delete WEP key twice to get rid of (now useless) offset */ 3605 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3606 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3607 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3608 3609 return ret; 3610 } 3611 3612 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3613 struct ieee80211_vif *vif, 3614 struct ieee80211_key_conf *keyconf, 3615 struct ieee80211_sta *sta, u32 iv32, 3616 u16 *phase1key) 3617 { 3618 struct iwl_mvm_sta *mvm_sta; 3619 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3620 bool mfp = sta ? sta->mfp : false; 3621 3622 rcu_read_lock(); 3623 3624 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3625 if (WARN_ON_ONCE(!mvm_sta)) 3626 goto unlock; 3627 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3628 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3629 mfp); 3630 3631 unlock: 3632 rcu_read_unlock(); 3633 } 3634 3635 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3636 struct ieee80211_sta *sta) 3637 { 3638 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3639 struct iwl_mvm_add_sta_cmd cmd = { 3640 .add_modify = STA_MODE_MODIFY, 3641 .sta_id = mvmsta->sta_id, 3642 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3643 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3644 }; 3645 int ret; 3646 3647 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3648 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3649 if (ret) 3650 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3651 } 3652 3653 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3654 struct ieee80211_sta *sta, 3655 enum ieee80211_frame_release_type reason, 3656 u16 cnt, u16 tids, bool more_data, 3657 bool single_sta_queue) 3658 { 3659 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3660 struct iwl_mvm_add_sta_cmd cmd = { 3661 .add_modify = STA_MODE_MODIFY, 3662 .sta_id = mvmsta->sta_id, 3663 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3664 .sleep_tx_count = cpu_to_le16(cnt), 3665 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3666 }; 3667 int tid, ret; 3668 unsigned long _tids = tids; 3669 3670 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3671 * Note that this field is reserved and unused by firmware not 3672 * supporting GO uAPSD, so it's safe to always do this. 3673 */ 3674 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3675 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3676 3677 /* If we're releasing frames from aggregation or dqa queues then check 3678 * if all the queues that we're releasing frames from, combined, have: 3679 * - more frames than the service period, in which case more_data 3680 * needs to be set 3681 * - fewer than 'cnt' frames, in which case we need to adjust the 3682 * firmware command (but do that unconditionally) 3683 */ 3684 if (single_sta_queue) { 3685 int remaining = cnt; 3686 int sleep_tx_count; 3687 3688 spin_lock_bh(&mvmsta->lock); 3689 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3690 struct iwl_mvm_tid_data *tid_data; 3691 u16 n_queued; 3692 3693 tid_data = &mvmsta->tid_data[tid]; 3694 3695 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3696 if (n_queued > remaining) { 3697 more_data = true; 3698 remaining = 0; 3699 break; 3700 } 3701 remaining -= n_queued; 3702 } 3703 sleep_tx_count = cnt - remaining; 3704 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3705 mvmsta->sleep_tx_count = sleep_tx_count; 3706 spin_unlock_bh(&mvmsta->lock); 3707 3708 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3709 if (WARN_ON(cnt - remaining == 0)) { 3710 ieee80211_sta_eosp(sta); 3711 return; 3712 } 3713 } 3714 3715 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3716 if (more_data) 3717 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3718 3719 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3720 mvmsta->next_status_eosp = true; 3721 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3722 } else { 3723 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3724 } 3725 3726 /* block the Tx queues until the FW updated the sleep Tx count */ 3727 iwl_trans_block_txq_ptrs(mvm->trans, true); 3728 3729 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3730 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3731 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3732 if (ret) 3733 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3734 } 3735 3736 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3737 struct iwl_rx_cmd_buffer *rxb) 3738 { 3739 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3740 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3741 struct ieee80211_sta *sta; 3742 u32 sta_id = le32_to_cpu(notif->sta_id); 3743 3744 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3745 return; 3746 3747 rcu_read_lock(); 3748 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3749 if (!IS_ERR_OR_NULL(sta)) 3750 ieee80211_sta_eosp(sta); 3751 rcu_read_unlock(); 3752 } 3753 3754 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3755 struct iwl_mvm_sta *mvmsta, bool disable) 3756 { 3757 struct iwl_mvm_add_sta_cmd cmd = { 3758 .add_modify = STA_MODE_MODIFY, 3759 .sta_id = mvmsta->sta_id, 3760 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3761 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3762 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3763 }; 3764 int ret; 3765 3766 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3767 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3768 if (ret) 3769 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3770 } 3771 3772 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3773 struct ieee80211_sta *sta, 3774 bool disable) 3775 { 3776 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3777 3778 spin_lock_bh(&mvm_sta->lock); 3779 3780 if (mvm_sta->disable_tx == disable) { 3781 spin_unlock_bh(&mvm_sta->lock); 3782 return; 3783 } 3784 3785 mvm_sta->disable_tx = disable; 3786 3787 /* Tell mac80211 to start/stop queuing tx for this station */ 3788 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3789 3790 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3791 3792 spin_unlock_bh(&mvm_sta->lock); 3793 } 3794 3795 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3796 struct iwl_mvm_vif *mvmvif, 3797 struct iwl_mvm_int_sta *sta, 3798 bool disable) 3799 { 3800 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3801 struct iwl_mvm_add_sta_cmd cmd = { 3802 .add_modify = STA_MODE_MODIFY, 3803 .sta_id = sta->sta_id, 3804 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3805 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3806 .mac_id_n_color = cpu_to_le32(id), 3807 }; 3808 int ret; 3809 3810 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3811 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3812 if (ret) 3813 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3814 } 3815 3816 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3817 struct iwl_mvm_vif *mvmvif, 3818 bool disable) 3819 { 3820 struct ieee80211_sta *sta; 3821 struct iwl_mvm_sta *mvm_sta; 3822 int i; 3823 3824 lockdep_assert_held(&mvm->mutex); 3825 3826 /* Block/unblock all the stations of the given mvmvif */ 3827 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3828 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3829 lockdep_is_held(&mvm->mutex)); 3830 if (IS_ERR_OR_NULL(sta)) 3831 continue; 3832 3833 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3834 if (mvm_sta->mac_id_n_color != 3835 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3836 continue; 3837 3838 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3839 } 3840 3841 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3842 return; 3843 3844 /* Need to block/unblock also multicast station */ 3845 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3846 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3847 &mvmvif->mcast_sta, disable); 3848 3849 /* 3850 * Only unblock the broadcast station (FW blocks it for immediate 3851 * quiet, not the driver) 3852 */ 3853 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3854 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3855 &mvmvif->bcast_sta, disable); 3856 } 3857 3858 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3859 { 3860 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3861 struct iwl_mvm_sta *mvmsta; 3862 3863 rcu_read_lock(); 3864 3865 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3866 3867 if (!WARN_ON(!mvmsta)) 3868 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3869 3870 rcu_read_unlock(); 3871 } 3872 3873 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3874 { 3875 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3876 3877 /* 3878 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3879 * to align the wrap around of ssn so we compare relevant values. 3880 */ 3881 if (mvm->trans->trans_cfg->gen2) 3882 sn &= 0xff; 3883 3884 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3885 } 3886