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 tid_data->txq_id = txq_id; 1486 1487 /* 1488 * Since we don't set the seq number after reset, and HW 1489 * sets it now, FW reset will cause the seq num to start 1490 * at 0 again, so driver will need to update it 1491 * internally as well, so it keeps in sync with real val 1492 */ 1493 tid_data->seq_number = 0; 1494 } else { 1495 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1496 1497 cfg.tid = i; 1498 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1499 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1500 txq_id == 1501 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1502 1503 IWL_DEBUG_TX_QUEUES(mvm, 1504 "Re-mapping sta %d tid %d to queue %d\n", 1505 mvm_sta->sta_id, i, txq_id); 1506 1507 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1508 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1509 } 1510 } 1511 } 1512 1513 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1514 struct iwl_mvm_int_sta *sta, 1515 const u8 *addr, 1516 u16 mac_id, u16 color) 1517 { 1518 struct iwl_mvm_add_sta_cmd cmd; 1519 int ret; 1520 u32 status = ADD_STA_SUCCESS; 1521 1522 lockdep_assert_held(&mvm->mutex); 1523 1524 memset(&cmd, 0, sizeof(cmd)); 1525 cmd.sta_id = sta->sta_id; 1526 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1527 color)); 1528 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1529 cmd.station_type = sta->type; 1530 1531 if (!iwl_mvm_has_new_tx_api(mvm)) 1532 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1533 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1534 1535 if (addr) 1536 memcpy(cmd.addr, addr, ETH_ALEN); 1537 1538 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1539 iwl_mvm_add_sta_cmd_size(mvm), 1540 &cmd, &status); 1541 if (ret) 1542 return ret; 1543 1544 switch (status & IWL_ADD_STA_STATUS_MASK) { 1545 case ADD_STA_SUCCESS: 1546 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1547 return 0; 1548 default: 1549 ret = -EIO; 1550 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1551 status); 1552 break; 1553 } 1554 return ret; 1555 } 1556 1557 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1558 struct ieee80211_vif *vif, 1559 struct ieee80211_sta *sta) 1560 { 1561 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1562 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1563 struct iwl_mvm_rxq_dup_data *dup_data; 1564 int i, ret, sta_id; 1565 bool sta_update = false; 1566 unsigned int sta_flags = 0; 1567 1568 lockdep_assert_held(&mvm->mutex); 1569 1570 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1571 sta_id = iwl_mvm_find_free_sta_id(mvm, 1572 ieee80211_vif_type_p2p(vif)); 1573 else 1574 sta_id = mvm_sta->sta_id; 1575 1576 if (sta_id == IWL_MVM_INVALID_STA) 1577 return -ENOSPC; 1578 1579 spin_lock_init(&mvm_sta->lock); 1580 1581 /* if this is a HW restart re-alloc existing queues */ 1582 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1583 struct iwl_mvm_int_sta tmp_sta = { 1584 .sta_id = sta_id, 1585 .type = mvm_sta->sta_type, 1586 }; 1587 1588 /* 1589 * First add an empty station since allocating 1590 * a queue requires a valid station 1591 */ 1592 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1593 mvmvif->id, mvmvif->color); 1594 if (ret) 1595 goto err; 1596 1597 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1598 sta_update = true; 1599 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1600 goto update_fw; 1601 } 1602 1603 mvm_sta->sta_id = sta_id; 1604 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1605 mvmvif->color); 1606 mvm_sta->vif = vif; 1607 if (!mvm->trans->trans_cfg->gen2) 1608 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1609 else 1610 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1611 mvm_sta->tx_protection = 0; 1612 mvm_sta->tt_tx_protection = false; 1613 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1614 1615 /* HW restart, don't assume the memory has been zeroed */ 1616 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1617 mvm_sta->tfd_queue_msk = 0; 1618 1619 /* for HW restart - reset everything but the sequence number */ 1620 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1621 u16 seq = mvm_sta->tid_data[i].seq_number; 1622 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1623 mvm_sta->tid_data[i].seq_number = seq; 1624 1625 /* 1626 * Mark all queues for this STA as unallocated and defer TX 1627 * frames until the queue is allocated 1628 */ 1629 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1630 } 1631 1632 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1633 struct iwl_mvm_txq *mvmtxq = 1634 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1635 1636 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1637 INIT_LIST_HEAD(&mvmtxq->list); 1638 atomic_set(&mvmtxq->tx_request, 0); 1639 } 1640 1641 mvm_sta->agg_tids = 0; 1642 1643 if (iwl_mvm_has_new_rx_api(mvm) && 1644 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1645 int q; 1646 1647 dup_data = kcalloc(mvm->trans->num_rx_queues, 1648 sizeof(*dup_data), GFP_KERNEL); 1649 if (!dup_data) 1650 return -ENOMEM; 1651 /* 1652 * Initialize all the last_seq values to 0xffff which can never 1653 * compare equal to the frame's seq_ctrl in the check in 1654 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1655 * number and fragmented packets don't reach that function. 1656 * 1657 * This thus allows receiving a packet with seqno 0 and the 1658 * retry bit set as the very first packet on a new TID. 1659 */ 1660 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1661 memset(dup_data[q].last_seq, 0xff, 1662 sizeof(dup_data[q].last_seq)); 1663 mvm_sta->dup_data = dup_data; 1664 } 1665 1666 if (!iwl_mvm_has_new_tx_api(mvm)) { 1667 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1668 ieee80211_vif_type_p2p(vif)); 1669 if (ret) 1670 goto err; 1671 } 1672 1673 /* 1674 * if rs is registered with mac80211, then "add station" will be handled 1675 * via the corresponding ops, otherwise need to notify rate scaling here 1676 */ 1677 if (iwl_mvm_has_tlc_offload(mvm)) 1678 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1679 else 1680 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1681 1682 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1683 1684 update_fw: 1685 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1686 if (ret) 1687 goto err; 1688 1689 if (vif->type == NL80211_IFTYPE_STATION) { 1690 if (!sta->tdls) { 1691 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1692 mvmvif->ap_sta_id = sta_id; 1693 } else { 1694 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1695 } 1696 } 1697 1698 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1699 1700 return 0; 1701 1702 err: 1703 return ret; 1704 } 1705 1706 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1707 bool drain) 1708 { 1709 struct iwl_mvm_add_sta_cmd cmd = {}; 1710 int ret; 1711 u32 status; 1712 1713 lockdep_assert_held(&mvm->mutex); 1714 1715 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1716 cmd.sta_id = mvmsta->sta_id; 1717 cmd.add_modify = STA_MODE_MODIFY; 1718 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1719 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1720 1721 status = ADD_STA_SUCCESS; 1722 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1723 iwl_mvm_add_sta_cmd_size(mvm), 1724 &cmd, &status); 1725 if (ret) 1726 return ret; 1727 1728 switch (status & IWL_ADD_STA_STATUS_MASK) { 1729 case ADD_STA_SUCCESS: 1730 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1731 mvmsta->sta_id); 1732 break; 1733 default: 1734 ret = -EIO; 1735 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1736 mvmsta->sta_id); 1737 break; 1738 } 1739 1740 return ret; 1741 } 1742 1743 /* 1744 * Remove a station from the FW table. Before sending the command to remove 1745 * the station validate that the station is indeed known to the driver (sanity 1746 * only). 1747 */ 1748 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1749 { 1750 struct ieee80211_sta *sta; 1751 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1752 .sta_id = sta_id, 1753 }; 1754 int ret; 1755 1756 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1757 lockdep_is_held(&mvm->mutex)); 1758 1759 /* Note: internal stations are marked as error values */ 1760 if (!sta) { 1761 IWL_ERR(mvm, "Invalid station id\n"); 1762 return -EINVAL; 1763 } 1764 1765 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1766 sizeof(rm_sta_cmd), &rm_sta_cmd); 1767 if (ret) { 1768 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1769 return ret; 1770 } 1771 1772 return 0; 1773 } 1774 1775 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1776 struct ieee80211_vif *vif, 1777 struct ieee80211_sta *sta) 1778 { 1779 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1780 int i; 1781 1782 lockdep_assert_held(&mvm->mutex); 1783 1784 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1785 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1786 continue; 1787 1788 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1789 0); 1790 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1791 } 1792 1793 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1794 struct iwl_mvm_txq *mvmtxq = 1795 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1796 1797 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1798 } 1799 } 1800 1801 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1802 struct iwl_mvm_sta *mvm_sta) 1803 { 1804 int i; 1805 1806 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1807 u16 txq_id; 1808 int ret; 1809 1810 spin_lock_bh(&mvm_sta->lock); 1811 txq_id = mvm_sta->tid_data[i].txq_id; 1812 spin_unlock_bh(&mvm_sta->lock); 1813 1814 if (txq_id == IWL_MVM_INVALID_QUEUE) 1815 continue; 1816 1817 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1818 if (ret) 1819 return ret; 1820 } 1821 1822 return 0; 1823 } 1824 1825 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1826 struct ieee80211_vif *vif, 1827 struct ieee80211_sta *sta) 1828 { 1829 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1830 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1831 u8 sta_id = mvm_sta->sta_id; 1832 int ret; 1833 1834 lockdep_assert_held(&mvm->mutex); 1835 1836 if (iwl_mvm_has_new_rx_api(mvm)) 1837 kfree(mvm_sta->dup_data); 1838 1839 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1840 if (ret) 1841 return ret; 1842 1843 /* flush its queues here since we are freeing mvm_sta */ 1844 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1845 if (ret) 1846 return ret; 1847 if (iwl_mvm_has_new_tx_api(mvm)) { 1848 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1849 } else { 1850 u32 q_mask = mvm_sta->tfd_queue_msk; 1851 1852 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1853 q_mask); 1854 } 1855 if (ret) 1856 return ret; 1857 1858 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1859 1860 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1861 1862 /* If there is a TXQ still marked as reserved - free it */ 1863 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1864 u8 reserved_txq = mvm_sta->reserved_queue; 1865 enum iwl_mvm_queue_status *status; 1866 1867 /* 1868 * If no traffic has gone through the reserved TXQ - it 1869 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1870 * should be manually marked as free again 1871 */ 1872 status = &mvm->queue_info[reserved_txq].status; 1873 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1874 (*status != IWL_MVM_QUEUE_FREE), 1875 "sta_id %d reserved txq %d status %d", 1876 sta_id, reserved_txq, *status)) 1877 return -EINVAL; 1878 1879 *status = IWL_MVM_QUEUE_FREE; 1880 } 1881 1882 if (vif->type == NL80211_IFTYPE_STATION && 1883 mvmvif->ap_sta_id == sta_id) { 1884 /* if associated - we can't remove the AP STA now */ 1885 if (vif->bss_conf.assoc) 1886 return ret; 1887 1888 /* unassoc - go ahead - remove the AP STA now */ 1889 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1890 } 1891 1892 /* 1893 * This shouldn't happen - the TDLS channel switch should be canceled 1894 * before the STA is removed. 1895 */ 1896 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1897 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1898 cancel_delayed_work(&mvm->tdls_cs.dwork); 1899 } 1900 1901 /* 1902 * Make sure that the tx response code sees the station as -EBUSY and 1903 * calls the drain worker. 1904 */ 1905 spin_lock_bh(&mvm_sta->lock); 1906 spin_unlock_bh(&mvm_sta->lock); 1907 1908 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1909 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1910 1911 return ret; 1912 } 1913 1914 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1915 struct ieee80211_vif *vif, 1916 u8 sta_id) 1917 { 1918 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1919 1920 lockdep_assert_held(&mvm->mutex); 1921 1922 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1923 return ret; 1924 } 1925 1926 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1927 struct iwl_mvm_int_sta *sta, 1928 u32 qmask, enum nl80211_iftype iftype, 1929 enum iwl_sta_type type) 1930 { 1931 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1932 sta->sta_id == IWL_MVM_INVALID_STA) { 1933 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1934 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1935 return -ENOSPC; 1936 } 1937 1938 sta->tfd_queue_msk = qmask; 1939 sta->type = type; 1940 1941 /* put a non-NULL value so iterating over the stations won't stop */ 1942 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1943 return 0; 1944 } 1945 1946 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1947 { 1948 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1949 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1950 sta->sta_id = IWL_MVM_INVALID_STA; 1951 } 1952 1953 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1954 u8 sta_id, u8 fifo) 1955 { 1956 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1957 mvm->trans->trans_cfg->base_params->wd_timeout : 1958 IWL_WATCHDOG_DISABLED; 1959 1960 if (iwl_mvm_has_new_tx_api(mvm)) { 1961 int tvqm_queue = 1962 iwl_mvm_tvqm_enable_txq(mvm, sta_id, 1963 IWL_MAX_TID_COUNT, 1964 wdg_timeout); 1965 *queue = tvqm_queue; 1966 } else { 1967 struct iwl_trans_txq_scd_cfg cfg = { 1968 .fifo = fifo, 1969 .sta_id = sta_id, 1970 .tid = IWL_MAX_TID_COUNT, 1971 .aggregate = false, 1972 .frame_limit = IWL_FRAME_LIMIT, 1973 }; 1974 1975 iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout); 1976 } 1977 } 1978 1979 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1980 { 1981 int ret; 1982 1983 lockdep_assert_held(&mvm->mutex); 1984 1985 /* Allocate aux station and assign to it the aux queue */ 1986 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1987 NL80211_IFTYPE_UNSPECIFIED, 1988 IWL_STA_AUX_ACTIVITY); 1989 if (ret) 1990 return ret; 1991 1992 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1993 if (!iwl_mvm_has_new_tx_api(mvm)) 1994 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1995 mvm->aux_sta.sta_id, 1996 IWL_MVM_TX_FIFO_MCAST); 1997 1998 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1999 MAC_INDEX_AUX, 0); 2000 if (ret) { 2001 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2002 return ret; 2003 } 2004 2005 /* 2006 * For 22000 firmware and on we cannot add queue to a station unknown 2007 * to firmware so enable queue here - after the station was added 2008 */ 2009 if (iwl_mvm_has_new_tx_api(mvm)) 2010 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2011 mvm->aux_sta.sta_id, 2012 IWL_MVM_TX_FIFO_MCAST); 2013 2014 return 0; 2015 } 2016 2017 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2018 { 2019 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2020 int ret; 2021 2022 lockdep_assert_held(&mvm->mutex); 2023 2024 /* Map snif queue to fifo - must happen before adding snif station */ 2025 if (!iwl_mvm_has_new_tx_api(mvm)) 2026 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2027 mvm->snif_sta.sta_id, 2028 IWL_MVM_TX_FIFO_BE); 2029 2030 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 2031 mvmvif->id, 0); 2032 if (ret) 2033 return ret; 2034 2035 /* 2036 * For 22000 firmware and on we cannot add queue to a station unknown 2037 * to firmware so enable queue here - after the station was added 2038 */ 2039 if (iwl_mvm_has_new_tx_api(mvm)) 2040 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2041 mvm->snif_sta.sta_id, 2042 IWL_MVM_TX_FIFO_BE); 2043 2044 return 0; 2045 } 2046 2047 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2048 { 2049 int ret; 2050 2051 lockdep_assert_held(&mvm->mutex); 2052 2053 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2054 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2055 if (ret) 2056 IWL_WARN(mvm, "Failed sending remove station\n"); 2057 2058 return ret; 2059 } 2060 2061 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2062 { 2063 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2064 } 2065 2066 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 2067 { 2068 lockdep_assert_held(&mvm->mutex); 2069 2070 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2071 } 2072 2073 /* 2074 * Send the add station command for the vif's broadcast station. 2075 * Assumes that the station was already allocated. 2076 * 2077 * @mvm: the mvm component 2078 * @vif: the interface to which the broadcast station is added 2079 * @bsta: the broadcast station to add. 2080 */ 2081 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2082 { 2083 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2084 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2085 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2086 const u8 *baddr = _baddr; 2087 int queue; 2088 int ret; 2089 unsigned int wdg_timeout = 2090 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2091 struct iwl_trans_txq_scd_cfg cfg = { 2092 .fifo = IWL_MVM_TX_FIFO_VO, 2093 .sta_id = mvmvif->bcast_sta.sta_id, 2094 .tid = IWL_MAX_TID_COUNT, 2095 .aggregate = false, 2096 .frame_limit = IWL_FRAME_LIMIT, 2097 }; 2098 2099 lockdep_assert_held(&mvm->mutex); 2100 2101 if (!iwl_mvm_has_new_tx_api(mvm)) { 2102 if (vif->type == NL80211_IFTYPE_AP || 2103 vif->type == NL80211_IFTYPE_ADHOC) { 2104 queue = mvm->probe_queue; 2105 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2106 queue = mvm->p2p_dev_queue; 2107 } else { 2108 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2109 return -EINVAL; 2110 } 2111 2112 bsta->tfd_queue_msk |= BIT(queue); 2113 2114 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2115 } 2116 2117 if (vif->type == NL80211_IFTYPE_ADHOC) 2118 baddr = vif->bss_conf.bssid; 2119 2120 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2121 return -ENOSPC; 2122 2123 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2124 mvmvif->id, mvmvif->color); 2125 if (ret) 2126 return ret; 2127 2128 /* 2129 * For 22000 firmware and on we cannot add queue to a station unknown 2130 * to firmware so enable queue here - after the station was added 2131 */ 2132 if (iwl_mvm_has_new_tx_api(mvm)) { 2133 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2134 IWL_MAX_TID_COUNT, 2135 wdg_timeout); 2136 2137 if (vif->type == NL80211_IFTYPE_AP || 2138 vif->type == NL80211_IFTYPE_ADHOC) 2139 mvm->probe_queue = queue; 2140 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2141 mvm->p2p_dev_queue = queue; 2142 } 2143 2144 return 0; 2145 } 2146 2147 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2148 struct ieee80211_vif *vif) 2149 { 2150 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2151 int queue; 2152 2153 lockdep_assert_held(&mvm->mutex); 2154 2155 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2156 2157 switch (vif->type) { 2158 case NL80211_IFTYPE_AP: 2159 case NL80211_IFTYPE_ADHOC: 2160 queue = mvm->probe_queue; 2161 break; 2162 case NL80211_IFTYPE_P2P_DEVICE: 2163 queue = mvm->p2p_dev_queue; 2164 break; 2165 default: 2166 WARN(1, "Can't free bcast queue on vif type %d\n", 2167 vif->type); 2168 return; 2169 } 2170 2171 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2172 if (iwl_mvm_has_new_tx_api(mvm)) 2173 return; 2174 2175 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2176 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2177 } 2178 2179 /* Send the FW a request to remove the station from it's internal data 2180 * structures, but DO NOT remove the entry from the local data structures. */ 2181 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2182 { 2183 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2184 int ret; 2185 2186 lockdep_assert_held(&mvm->mutex); 2187 2188 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2189 2190 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2191 if (ret) 2192 IWL_WARN(mvm, "Failed sending remove station\n"); 2193 return ret; 2194 } 2195 2196 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2197 { 2198 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2199 2200 lockdep_assert_held(&mvm->mutex); 2201 2202 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2203 ieee80211_vif_type_p2p(vif), 2204 IWL_STA_GENERAL_PURPOSE); 2205 } 2206 2207 /* Allocate a new station entry for the broadcast station to the given vif, 2208 * and send it to the FW. 2209 * Note that each P2P mac should have its own broadcast station. 2210 * 2211 * @mvm: the mvm component 2212 * @vif: the interface to which the broadcast station is added 2213 * @bsta: the broadcast station to add. */ 2214 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2215 { 2216 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2217 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2218 int ret; 2219 2220 lockdep_assert_held(&mvm->mutex); 2221 2222 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2223 if (ret) 2224 return ret; 2225 2226 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2227 2228 if (ret) 2229 iwl_mvm_dealloc_int_sta(mvm, bsta); 2230 2231 return ret; 2232 } 2233 2234 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2235 { 2236 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2237 2238 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2239 } 2240 2241 /* 2242 * Send the FW a request to remove the station from it's internal data 2243 * structures, and in addition remove it from the local data structure. 2244 */ 2245 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2246 { 2247 int ret; 2248 2249 lockdep_assert_held(&mvm->mutex); 2250 2251 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2252 2253 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2254 2255 return ret; 2256 } 2257 2258 /* 2259 * Allocate a new station entry for the multicast station to the given vif, 2260 * and send it to the FW. 2261 * Note that each AP/GO mac should have its own multicast station. 2262 * 2263 * @mvm: the mvm component 2264 * @vif: the interface to which the multicast station is added 2265 */ 2266 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2267 { 2268 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2269 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2270 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2271 const u8 *maddr = _maddr; 2272 struct iwl_trans_txq_scd_cfg cfg = { 2273 .fifo = vif->type == NL80211_IFTYPE_AP ? 2274 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2275 .sta_id = msta->sta_id, 2276 .tid = 0, 2277 .aggregate = false, 2278 .frame_limit = IWL_FRAME_LIMIT, 2279 }; 2280 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2281 int ret; 2282 2283 lockdep_assert_held(&mvm->mutex); 2284 2285 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2286 vif->type != NL80211_IFTYPE_ADHOC)) 2287 return -ENOTSUPP; 2288 2289 /* 2290 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2291 * invalid, so make sure we use the queue we want. 2292 * Note that this is done here as we want to avoid making DQA 2293 * changes in mac80211 layer. 2294 */ 2295 if (vif->type == NL80211_IFTYPE_ADHOC) 2296 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2297 2298 /* 2299 * While in previous FWs we had to exclude cab queue from TFD queue 2300 * mask, now it is needed as any other queue. 2301 */ 2302 if (!iwl_mvm_has_new_tx_api(mvm) && 2303 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2304 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2305 timeout); 2306 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2307 } 2308 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2309 mvmvif->id, mvmvif->color); 2310 if (ret) { 2311 iwl_mvm_dealloc_int_sta(mvm, msta); 2312 return ret; 2313 } 2314 2315 /* 2316 * Enable cab queue after the ADD_STA command is sent. 2317 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2318 * command with unknown station id, and for FW that doesn't support 2319 * station API since the cab queue is not included in the 2320 * tfd_queue_mask. 2321 */ 2322 if (iwl_mvm_has_new_tx_api(mvm)) { 2323 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2324 0, 2325 timeout); 2326 mvmvif->cab_queue = queue; 2327 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2328 IWL_UCODE_TLV_API_STA_TYPE)) 2329 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2330 timeout); 2331 2332 return 0; 2333 } 2334 2335 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2336 struct ieee80211_key_conf *keyconf, 2337 bool mcast) 2338 { 2339 union { 2340 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2341 struct iwl_mvm_add_sta_key_cmd cmd; 2342 } u = {}; 2343 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2344 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2345 __le16 key_flags; 2346 int ret, size; 2347 u32 status; 2348 2349 /* This is a valid situation for GTK removal */ 2350 if (sta_id == IWL_MVM_INVALID_STA) 2351 return 0; 2352 2353 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2354 STA_KEY_FLG_KEYID_MSK); 2355 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2356 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2357 2358 if (mcast) 2359 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2360 2361 /* 2362 * The fields assigned here are in the same location at the start 2363 * of the command, so we can do this union trick. 2364 */ 2365 u.cmd.common.key_flags = key_flags; 2366 u.cmd.common.key_offset = keyconf->hw_key_idx; 2367 u.cmd.common.sta_id = sta_id; 2368 2369 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2370 2371 status = ADD_STA_SUCCESS; 2372 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2373 &status); 2374 2375 switch (status) { 2376 case ADD_STA_SUCCESS: 2377 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2378 break; 2379 default: 2380 ret = -EIO; 2381 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2382 break; 2383 } 2384 2385 return ret; 2386 } 2387 2388 /* 2389 * Send the FW a request to remove the station from it's internal data 2390 * structures, and in addition remove it from the local data structure. 2391 */ 2392 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2393 { 2394 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2395 int ret; 2396 2397 lockdep_assert_held(&mvm->mutex); 2398 2399 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2400 2401 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2402 2403 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2404 if (ret) 2405 IWL_WARN(mvm, "Failed sending remove station\n"); 2406 2407 return ret; 2408 } 2409 2410 #define IWL_MAX_RX_BA_SESSIONS 16 2411 2412 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2413 { 2414 struct iwl_mvm_rss_sync_notif notif = { 2415 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2416 .metadata.sync = 1, 2417 .delba.baid = baid, 2418 }; 2419 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2420 }; 2421 2422 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2423 struct iwl_mvm_baid_data *data) 2424 { 2425 int i; 2426 2427 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2428 2429 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2430 int j; 2431 struct iwl_mvm_reorder_buffer *reorder_buf = 2432 &data->reorder_buf[i]; 2433 struct iwl_mvm_reorder_buf_entry *entries = 2434 &data->entries[i * data->entries_per_queue]; 2435 2436 spin_lock_bh(&reorder_buf->lock); 2437 if (likely(!reorder_buf->num_stored)) { 2438 spin_unlock_bh(&reorder_buf->lock); 2439 continue; 2440 } 2441 2442 /* 2443 * This shouldn't happen in regular DELBA since the internal 2444 * delBA notification should trigger a release of all frames in 2445 * the reorder buffer. 2446 */ 2447 WARN_ON(1); 2448 2449 for (j = 0; j < reorder_buf->buf_size; j++) 2450 __skb_queue_purge(&entries[j].e.frames); 2451 /* 2452 * Prevent timer re-arm. This prevents a very far fetched case 2453 * where we timed out on the notification. There may be prior 2454 * RX frames pending in the RX queue before the notification 2455 * that might get processed between now and the actual deletion 2456 * and we would re-arm the timer although we are deleting the 2457 * reorder buffer. 2458 */ 2459 reorder_buf->removed = true; 2460 spin_unlock_bh(&reorder_buf->lock); 2461 del_timer_sync(&reorder_buf->reorder_timer); 2462 } 2463 } 2464 2465 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2466 struct iwl_mvm_baid_data *data, 2467 u16 ssn, u16 buf_size) 2468 { 2469 int i; 2470 2471 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2472 struct iwl_mvm_reorder_buffer *reorder_buf = 2473 &data->reorder_buf[i]; 2474 struct iwl_mvm_reorder_buf_entry *entries = 2475 &data->entries[i * data->entries_per_queue]; 2476 int j; 2477 2478 reorder_buf->num_stored = 0; 2479 reorder_buf->head_sn = ssn; 2480 reorder_buf->buf_size = buf_size; 2481 /* rx reorder timer */ 2482 timer_setup(&reorder_buf->reorder_timer, 2483 iwl_mvm_reorder_timer_expired, 0); 2484 spin_lock_init(&reorder_buf->lock); 2485 reorder_buf->mvm = mvm; 2486 reorder_buf->queue = i; 2487 reorder_buf->valid = false; 2488 for (j = 0; j < reorder_buf->buf_size; j++) 2489 __skb_queue_head_init(&entries[j].e.frames); 2490 } 2491 } 2492 2493 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2494 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2495 { 2496 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2497 struct iwl_mvm_add_sta_cmd cmd = {}; 2498 struct iwl_mvm_baid_data *baid_data = NULL; 2499 int ret; 2500 u32 status; 2501 2502 lockdep_assert_held(&mvm->mutex); 2503 2504 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2505 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2506 return -ENOSPC; 2507 } 2508 2509 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2510 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2511 2512 /* sparse doesn't like the __align() so don't check */ 2513 #ifndef __CHECKER__ 2514 /* 2515 * The division below will be OK if either the cache line size 2516 * can be divided by the entry size (ALIGN will round up) or if 2517 * if the entry size can be divided by the cache line size, in 2518 * which case the ALIGN() will do nothing. 2519 */ 2520 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2521 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2522 #endif 2523 2524 /* 2525 * Upward align the reorder buffer size to fill an entire cache 2526 * line for each queue, to avoid sharing cache lines between 2527 * different queues. 2528 */ 2529 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2530 2531 /* 2532 * Allocate here so if allocation fails we can bail out early 2533 * before starting the BA session in the firmware 2534 */ 2535 baid_data = kzalloc(sizeof(*baid_data) + 2536 mvm->trans->num_rx_queues * 2537 reorder_buf_size, 2538 GFP_KERNEL); 2539 if (!baid_data) 2540 return -ENOMEM; 2541 2542 /* 2543 * This division is why we need the above BUILD_BUG_ON(), 2544 * if that doesn't hold then this will not be right. 2545 */ 2546 baid_data->entries_per_queue = 2547 reorder_buf_size / sizeof(baid_data->entries[0]); 2548 } 2549 2550 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2551 cmd.sta_id = mvm_sta->sta_id; 2552 cmd.add_modify = STA_MODE_MODIFY; 2553 if (start) { 2554 cmd.add_immediate_ba_tid = (u8) tid; 2555 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2556 cmd.rx_ba_window = cpu_to_le16(buf_size); 2557 } else { 2558 cmd.remove_immediate_ba_tid = (u8) tid; 2559 } 2560 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2561 STA_MODIFY_REMOVE_BA_TID; 2562 2563 status = ADD_STA_SUCCESS; 2564 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2565 iwl_mvm_add_sta_cmd_size(mvm), 2566 &cmd, &status); 2567 if (ret) 2568 goto out_free; 2569 2570 switch (status & IWL_ADD_STA_STATUS_MASK) { 2571 case ADD_STA_SUCCESS: 2572 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2573 start ? "start" : "stopp"); 2574 break; 2575 case ADD_STA_IMMEDIATE_BA_FAILURE: 2576 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2577 ret = -ENOSPC; 2578 break; 2579 default: 2580 ret = -EIO; 2581 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2582 start ? "start" : "stopp", status); 2583 break; 2584 } 2585 2586 if (ret) 2587 goto out_free; 2588 2589 if (start) { 2590 u8 baid; 2591 2592 mvm->rx_ba_sessions++; 2593 2594 if (!iwl_mvm_has_new_rx_api(mvm)) 2595 return 0; 2596 2597 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2598 ret = -EINVAL; 2599 goto out_free; 2600 } 2601 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2602 IWL_ADD_STA_BAID_SHIFT); 2603 baid_data->baid = baid; 2604 baid_data->timeout = timeout; 2605 baid_data->last_rx = jiffies; 2606 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2607 timer_setup(&baid_data->session_timer, 2608 iwl_mvm_rx_agg_session_expired, 0); 2609 baid_data->mvm = mvm; 2610 baid_data->tid = tid; 2611 baid_data->sta_id = mvm_sta->sta_id; 2612 2613 mvm_sta->tid_to_baid[tid] = baid; 2614 if (timeout) 2615 mod_timer(&baid_data->session_timer, 2616 TU_TO_EXP_TIME(timeout * 2)); 2617 2618 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2619 /* 2620 * protect the BA data with RCU to cover a case where our 2621 * internal RX sync mechanism will timeout (not that it's 2622 * supposed to happen) and we will free the session data while 2623 * RX is being processed in parallel 2624 */ 2625 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2626 mvm_sta->sta_id, tid, baid); 2627 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2628 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2629 } else { 2630 u8 baid = mvm_sta->tid_to_baid[tid]; 2631 2632 if (mvm->rx_ba_sessions > 0) 2633 /* check that restart flow didn't zero the counter */ 2634 mvm->rx_ba_sessions--; 2635 if (!iwl_mvm_has_new_rx_api(mvm)) 2636 return 0; 2637 2638 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2639 return -EINVAL; 2640 2641 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2642 if (WARN_ON(!baid_data)) 2643 return -EINVAL; 2644 2645 /* synchronize all rx queues so we can safely delete */ 2646 iwl_mvm_free_reorder(mvm, baid_data); 2647 del_timer_sync(&baid_data->session_timer); 2648 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2649 kfree_rcu(baid_data, rcu_head); 2650 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2651 } 2652 return 0; 2653 2654 out_free: 2655 kfree(baid_data); 2656 return ret; 2657 } 2658 2659 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2660 int tid, u8 queue, bool start) 2661 { 2662 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2663 struct iwl_mvm_add_sta_cmd cmd = {}; 2664 int ret; 2665 u32 status; 2666 2667 lockdep_assert_held(&mvm->mutex); 2668 2669 if (start) { 2670 mvm_sta->tfd_queue_msk |= BIT(queue); 2671 mvm_sta->tid_disable_agg &= ~BIT(tid); 2672 } else { 2673 /* In DQA-mode the queue isn't removed on agg termination */ 2674 mvm_sta->tid_disable_agg |= BIT(tid); 2675 } 2676 2677 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2678 cmd.sta_id = mvm_sta->sta_id; 2679 cmd.add_modify = STA_MODE_MODIFY; 2680 if (!iwl_mvm_has_new_tx_api(mvm)) 2681 cmd.modify_mask = STA_MODIFY_QUEUES; 2682 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2683 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2684 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2685 2686 status = ADD_STA_SUCCESS; 2687 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2688 iwl_mvm_add_sta_cmd_size(mvm), 2689 &cmd, &status); 2690 if (ret) 2691 return ret; 2692 2693 switch (status & IWL_ADD_STA_STATUS_MASK) { 2694 case ADD_STA_SUCCESS: 2695 break; 2696 default: 2697 ret = -EIO; 2698 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2699 start ? "start" : "stopp", status); 2700 break; 2701 } 2702 2703 return ret; 2704 } 2705 2706 const u8 tid_to_mac80211_ac[] = { 2707 IEEE80211_AC_BE, 2708 IEEE80211_AC_BK, 2709 IEEE80211_AC_BK, 2710 IEEE80211_AC_BE, 2711 IEEE80211_AC_VI, 2712 IEEE80211_AC_VI, 2713 IEEE80211_AC_VO, 2714 IEEE80211_AC_VO, 2715 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2716 }; 2717 2718 static const u8 tid_to_ucode_ac[] = { 2719 AC_BE, 2720 AC_BK, 2721 AC_BK, 2722 AC_BE, 2723 AC_VI, 2724 AC_VI, 2725 AC_VO, 2726 AC_VO, 2727 }; 2728 2729 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2730 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2731 { 2732 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2733 struct iwl_mvm_tid_data *tid_data; 2734 u16 normalized_ssn; 2735 u16 txq_id; 2736 int ret; 2737 2738 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2739 return -EINVAL; 2740 2741 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2742 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2743 IWL_ERR(mvm, 2744 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2745 mvmsta->tid_data[tid].state); 2746 return -ENXIO; 2747 } 2748 2749 lockdep_assert_held(&mvm->mutex); 2750 2751 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2752 iwl_mvm_has_new_tx_api(mvm)) { 2753 u8 ac = tid_to_mac80211_ac[tid]; 2754 2755 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2756 if (ret) 2757 return ret; 2758 } 2759 2760 spin_lock_bh(&mvmsta->lock); 2761 2762 /* 2763 * Note the possible cases: 2764 * 1. An enabled TXQ - TXQ needs to become agg'ed 2765 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2766 * it as reserved 2767 */ 2768 txq_id = mvmsta->tid_data[tid].txq_id; 2769 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2770 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2771 IWL_MVM_DQA_MIN_DATA_QUEUE, 2772 IWL_MVM_DQA_MAX_DATA_QUEUE); 2773 if (ret < 0) { 2774 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2775 goto out; 2776 } 2777 2778 txq_id = ret; 2779 2780 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2781 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2782 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2783 ret = -ENXIO; 2784 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2785 tid, IWL_MAX_HW_QUEUES - 1); 2786 goto out; 2787 2788 } else if (unlikely(mvm->queue_info[txq_id].status == 2789 IWL_MVM_QUEUE_SHARED)) { 2790 ret = -ENXIO; 2791 IWL_DEBUG_TX_QUEUES(mvm, 2792 "Can't start tid %d agg on shared queue!\n", 2793 tid); 2794 goto out; 2795 } 2796 2797 IWL_DEBUG_TX_QUEUES(mvm, 2798 "AGG for tid %d will be on queue #%d\n", 2799 tid, txq_id); 2800 2801 tid_data = &mvmsta->tid_data[tid]; 2802 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2803 tid_data->txq_id = txq_id; 2804 *ssn = tid_data->ssn; 2805 2806 IWL_DEBUG_TX_QUEUES(mvm, 2807 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2808 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2809 tid_data->next_reclaimed); 2810 2811 /* 2812 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2813 * to align the wrap around of ssn so we compare relevant values. 2814 */ 2815 normalized_ssn = tid_data->ssn; 2816 if (mvm->trans->trans_cfg->gen2) 2817 normalized_ssn &= 0xff; 2818 2819 if (normalized_ssn == tid_data->next_reclaimed) { 2820 tid_data->state = IWL_AGG_STARTING; 2821 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2822 } else { 2823 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2824 } 2825 2826 ret = 0; 2827 2828 out: 2829 spin_unlock_bh(&mvmsta->lock); 2830 2831 return ret; 2832 } 2833 2834 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2835 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2836 bool amsdu) 2837 { 2838 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2839 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2840 unsigned int wdg_timeout = 2841 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2842 int queue, ret; 2843 bool alloc_queue = true; 2844 enum iwl_mvm_queue_status queue_status; 2845 u16 ssn; 2846 2847 struct iwl_trans_txq_scd_cfg cfg = { 2848 .sta_id = mvmsta->sta_id, 2849 .tid = tid, 2850 .frame_limit = buf_size, 2851 .aggregate = true, 2852 }; 2853 2854 /* 2855 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2856 * manager, so this function should never be called in this case. 2857 */ 2858 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2859 return -EINVAL; 2860 2861 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2862 != IWL_MAX_TID_COUNT); 2863 2864 spin_lock_bh(&mvmsta->lock); 2865 ssn = tid_data->ssn; 2866 queue = tid_data->txq_id; 2867 tid_data->state = IWL_AGG_ON; 2868 mvmsta->agg_tids |= BIT(tid); 2869 tid_data->ssn = 0xffff; 2870 tid_data->amsdu_in_ampdu_allowed = amsdu; 2871 spin_unlock_bh(&mvmsta->lock); 2872 2873 if (iwl_mvm_has_new_tx_api(mvm)) { 2874 /* 2875 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2876 * would have failed, so if we are here there is no need to 2877 * allocate a queue. 2878 * However, if aggregation size is different than the default 2879 * size, the scheduler should be reconfigured. 2880 * We cannot do this with the new TX API, so return unsupported 2881 * for now, until it will be offloaded to firmware.. 2882 * Note that if SCD default value changes - this condition 2883 * should be updated as well. 2884 */ 2885 if (buf_size < IWL_FRAME_LIMIT) 2886 return -ENOTSUPP; 2887 2888 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2889 if (ret) 2890 return -EIO; 2891 goto out; 2892 } 2893 2894 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2895 2896 queue_status = mvm->queue_info[queue].status; 2897 2898 /* Maybe there is no need to even alloc a queue... */ 2899 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2900 alloc_queue = false; 2901 2902 /* 2903 * Only reconfig the SCD for the queue if the window size has 2904 * changed from current (become smaller) 2905 */ 2906 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2907 /* 2908 * If reconfiguring an existing queue, it first must be 2909 * drained 2910 */ 2911 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2912 BIT(queue)); 2913 if (ret) { 2914 IWL_ERR(mvm, 2915 "Error draining queue before reconfig\n"); 2916 return ret; 2917 } 2918 2919 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2920 mvmsta->sta_id, tid, 2921 buf_size, ssn); 2922 if (ret) { 2923 IWL_ERR(mvm, 2924 "Error reconfiguring TXQ #%d\n", queue); 2925 return ret; 2926 } 2927 } 2928 2929 if (alloc_queue) 2930 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2931 &cfg, wdg_timeout); 2932 2933 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2934 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2935 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2936 if (ret) 2937 return -EIO; 2938 } 2939 2940 /* No need to mark as reserved */ 2941 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2942 2943 out: 2944 /* 2945 * Even though in theory the peer could have different 2946 * aggregation reorder buffer sizes for different sessions, 2947 * our ucode doesn't allow for that and has a global limit 2948 * for each station. Therefore, use the minimum of all the 2949 * aggregation sessions and our default value. 2950 */ 2951 mvmsta->max_agg_bufsize = 2952 min(mvmsta->max_agg_bufsize, buf_size); 2953 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2954 2955 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2956 sta->addr, tid); 2957 2958 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 2959 } 2960 2961 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2962 struct iwl_mvm_sta *mvmsta, 2963 struct iwl_mvm_tid_data *tid_data) 2964 { 2965 u16 txq_id = tid_data->txq_id; 2966 2967 lockdep_assert_held(&mvm->mutex); 2968 2969 if (iwl_mvm_has_new_tx_api(mvm)) 2970 return; 2971 2972 /* 2973 * The TXQ is marked as reserved only if no traffic came through yet 2974 * This means no traffic has been sent on this TID (agg'd or not), so 2975 * we no longer have use for the queue. Since it hasn't even been 2976 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2977 * free. 2978 */ 2979 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 2980 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2981 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 2982 } 2983 } 2984 2985 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2986 struct ieee80211_sta *sta, u16 tid) 2987 { 2988 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2989 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2990 u16 txq_id; 2991 int err; 2992 2993 /* 2994 * If mac80211 is cleaning its state, then say that we finished since 2995 * our state has been cleared anyway. 2996 */ 2997 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2998 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2999 return 0; 3000 } 3001 3002 spin_lock_bh(&mvmsta->lock); 3003 3004 txq_id = tid_data->txq_id; 3005 3006 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3007 mvmsta->sta_id, tid, txq_id, tid_data->state); 3008 3009 mvmsta->agg_tids &= ~BIT(tid); 3010 3011 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3012 3013 switch (tid_data->state) { 3014 case IWL_AGG_ON: 3015 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3016 3017 IWL_DEBUG_TX_QUEUES(mvm, 3018 "ssn = %d, next_recl = %d\n", 3019 tid_data->ssn, tid_data->next_reclaimed); 3020 3021 tid_data->ssn = 0xffff; 3022 tid_data->state = IWL_AGG_OFF; 3023 spin_unlock_bh(&mvmsta->lock); 3024 3025 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3026 3027 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3028 return 0; 3029 case IWL_AGG_STARTING: 3030 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3031 /* 3032 * The agg session has been stopped before it was set up. This 3033 * can happen when the AddBA timer times out for example. 3034 */ 3035 3036 /* No barriers since we are under mutex */ 3037 lockdep_assert_held(&mvm->mutex); 3038 3039 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3040 tid_data->state = IWL_AGG_OFF; 3041 err = 0; 3042 break; 3043 default: 3044 IWL_ERR(mvm, 3045 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3046 mvmsta->sta_id, tid, tid_data->state); 3047 IWL_ERR(mvm, 3048 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3049 err = -EINVAL; 3050 } 3051 3052 spin_unlock_bh(&mvmsta->lock); 3053 3054 return err; 3055 } 3056 3057 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3058 struct ieee80211_sta *sta, u16 tid) 3059 { 3060 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3061 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3062 u16 txq_id; 3063 enum iwl_mvm_agg_state old_state; 3064 3065 /* 3066 * First set the agg state to OFF to avoid calling 3067 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3068 */ 3069 spin_lock_bh(&mvmsta->lock); 3070 txq_id = tid_data->txq_id; 3071 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3072 mvmsta->sta_id, tid, txq_id, tid_data->state); 3073 old_state = tid_data->state; 3074 tid_data->state = IWL_AGG_OFF; 3075 mvmsta->agg_tids &= ~BIT(tid); 3076 spin_unlock_bh(&mvmsta->lock); 3077 3078 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3079 3080 if (old_state >= IWL_AGG_ON) { 3081 iwl_mvm_drain_sta(mvm, mvmsta, true); 3082 3083 if (iwl_mvm_has_new_tx_api(mvm)) { 3084 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3085 BIT(tid), 0)) 3086 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3087 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3088 } else { 3089 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3090 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3091 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3092 } 3093 3094 iwl_mvm_drain_sta(mvm, mvmsta, false); 3095 3096 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3097 } 3098 3099 return 0; 3100 } 3101 3102 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3103 { 3104 int i, max = -1, max_offs = -1; 3105 3106 lockdep_assert_held(&mvm->mutex); 3107 3108 /* Pick the unused key offset with the highest 'deleted' 3109 * counter. Every time a key is deleted, all the counters 3110 * are incremented and the one that was just deleted is 3111 * reset to zero. Thus, the highest counter is the one 3112 * that was deleted longest ago. Pick that one. 3113 */ 3114 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3115 if (test_bit(i, mvm->fw_key_table)) 3116 continue; 3117 if (mvm->fw_key_deleted[i] > max) { 3118 max = mvm->fw_key_deleted[i]; 3119 max_offs = i; 3120 } 3121 } 3122 3123 if (max_offs < 0) 3124 return STA_KEY_IDX_INVALID; 3125 3126 return max_offs; 3127 } 3128 3129 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3130 struct ieee80211_vif *vif, 3131 struct ieee80211_sta *sta) 3132 { 3133 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3134 3135 if (sta) 3136 return iwl_mvm_sta_from_mac80211(sta); 3137 3138 /* 3139 * The device expects GTKs for station interfaces to be 3140 * installed as GTKs for the AP station. If we have no 3141 * station ID, then use AP's station ID. 3142 */ 3143 if (vif->type == NL80211_IFTYPE_STATION && 3144 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3145 u8 sta_id = mvmvif->ap_sta_id; 3146 3147 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3148 lockdep_is_held(&mvm->mutex)); 3149 3150 /* 3151 * It is possible that the 'sta' parameter is NULL, 3152 * for example when a GTK is removed - the sta_id will then 3153 * be the AP ID, and no station was passed by mac80211. 3154 */ 3155 if (IS_ERR_OR_NULL(sta)) 3156 return NULL; 3157 3158 return iwl_mvm_sta_from_mac80211(sta); 3159 } 3160 3161 return NULL; 3162 } 3163 3164 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3165 u32 sta_id, 3166 struct ieee80211_key_conf *key, bool mcast, 3167 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3168 u8 key_offset, bool mfp) 3169 { 3170 union { 3171 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3172 struct iwl_mvm_add_sta_key_cmd cmd; 3173 } u = {}; 3174 __le16 key_flags; 3175 int ret; 3176 u32 status; 3177 u16 keyidx; 3178 u64 pn = 0; 3179 int i, size; 3180 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3181 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3182 3183 if (sta_id == IWL_MVM_INVALID_STA) 3184 return -EINVAL; 3185 3186 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3187 STA_KEY_FLG_KEYID_MSK; 3188 key_flags = cpu_to_le16(keyidx); 3189 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3190 3191 switch (key->cipher) { 3192 case WLAN_CIPHER_SUITE_TKIP: 3193 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3194 if (new_api) { 3195 memcpy((void *)&u.cmd.tx_mic_key, 3196 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3197 IWL_MIC_KEY_SIZE); 3198 3199 memcpy((void *)&u.cmd.rx_mic_key, 3200 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3201 IWL_MIC_KEY_SIZE); 3202 pn = atomic64_read(&key->tx_pn); 3203 3204 } else { 3205 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3206 for (i = 0; i < 5; i++) 3207 u.cmd_v1.tkip_rx_ttak[i] = 3208 cpu_to_le16(tkip_p1k[i]); 3209 } 3210 memcpy(u.cmd.common.key, key->key, key->keylen); 3211 break; 3212 case WLAN_CIPHER_SUITE_CCMP: 3213 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3214 memcpy(u.cmd.common.key, key->key, key->keylen); 3215 if (new_api) 3216 pn = atomic64_read(&key->tx_pn); 3217 break; 3218 case WLAN_CIPHER_SUITE_WEP104: 3219 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3220 /* fall through */ 3221 case WLAN_CIPHER_SUITE_WEP40: 3222 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3223 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3224 break; 3225 case WLAN_CIPHER_SUITE_GCMP_256: 3226 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3227 /* fall through */ 3228 case WLAN_CIPHER_SUITE_GCMP: 3229 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3230 memcpy(u.cmd.common.key, key->key, key->keylen); 3231 if (new_api) 3232 pn = atomic64_read(&key->tx_pn); 3233 break; 3234 default: 3235 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3236 memcpy(u.cmd.common.key, key->key, key->keylen); 3237 } 3238 3239 if (mcast) 3240 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3241 if (mfp) 3242 key_flags |= cpu_to_le16(STA_KEY_MFP); 3243 3244 u.cmd.common.key_offset = key_offset; 3245 u.cmd.common.key_flags = key_flags; 3246 u.cmd.common.sta_id = sta_id; 3247 3248 if (new_api) { 3249 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3250 size = sizeof(u.cmd); 3251 } else { 3252 size = sizeof(u.cmd_v1); 3253 } 3254 3255 status = ADD_STA_SUCCESS; 3256 if (cmd_flags & CMD_ASYNC) 3257 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3258 &u.cmd); 3259 else 3260 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3261 &u.cmd, &status); 3262 3263 switch (status) { 3264 case ADD_STA_SUCCESS: 3265 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3266 break; 3267 default: 3268 ret = -EIO; 3269 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3270 break; 3271 } 3272 3273 return ret; 3274 } 3275 3276 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3277 struct ieee80211_key_conf *keyconf, 3278 u8 sta_id, bool remove_key) 3279 { 3280 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3281 3282 /* verify the key details match the required command's expectations */ 3283 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3284 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3285 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3286 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3287 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3288 return -EINVAL; 3289 3290 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3291 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3292 return -EINVAL; 3293 3294 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3295 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3296 3297 if (remove_key) { 3298 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3299 } else { 3300 struct ieee80211_key_seq seq; 3301 const u8 *pn; 3302 3303 switch (keyconf->cipher) { 3304 case WLAN_CIPHER_SUITE_AES_CMAC: 3305 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3306 break; 3307 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3308 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3309 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3310 break; 3311 default: 3312 return -EINVAL; 3313 } 3314 3315 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3316 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3317 igtk_cmd.ctrl_flags |= 3318 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3319 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3320 pn = seq.aes_cmac.pn; 3321 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3322 ((u64) pn[4] << 8) | 3323 ((u64) pn[3] << 16) | 3324 ((u64) pn[2] << 24) | 3325 ((u64) pn[1] << 32) | 3326 ((u64) pn[0] << 40)); 3327 } 3328 3329 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3330 remove_key ? "removing" : "installing", 3331 igtk_cmd.sta_id); 3332 3333 if (!iwl_mvm_has_new_rx_api(mvm)) { 3334 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3335 .ctrl_flags = igtk_cmd.ctrl_flags, 3336 .key_id = igtk_cmd.key_id, 3337 .sta_id = igtk_cmd.sta_id, 3338 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3339 }; 3340 3341 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3342 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3343 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3344 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3345 } 3346 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3347 sizeof(igtk_cmd), &igtk_cmd); 3348 } 3349 3350 3351 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3352 struct ieee80211_vif *vif, 3353 struct ieee80211_sta *sta) 3354 { 3355 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3356 3357 if (sta) 3358 return sta->addr; 3359 3360 if (vif->type == NL80211_IFTYPE_STATION && 3361 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3362 u8 sta_id = mvmvif->ap_sta_id; 3363 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3364 lockdep_is_held(&mvm->mutex)); 3365 return sta->addr; 3366 } 3367 3368 3369 return NULL; 3370 } 3371 3372 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3373 struct ieee80211_vif *vif, 3374 struct ieee80211_sta *sta, 3375 struct ieee80211_key_conf *keyconf, 3376 u8 key_offset, 3377 bool mcast) 3378 { 3379 int ret; 3380 const u8 *addr; 3381 struct ieee80211_key_seq seq; 3382 u16 p1k[5]; 3383 u32 sta_id; 3384 bool mfp = false; 3385 3386 if (sta) { 3387 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3388 3389 sta_id = mvm_sta->sta_id; 3390 mfp = sta->mfp; 3391 } else if (vif->type == NL80211_IFTYPE_AP && 3392 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3393 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3394 3395 sta_id = mvmvif->mcast_sta.sta_id; 3396 } else { 3397 IWL_ERR(mvm, "Failed to find station id\n"); 3398 return -EINVAL; 3399 } 3400 3401 switch (keyconf->cipher) { 3402 case WLAN_CIPHER_SUITE_TKIP: 3403 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3404 /* get phase 1 key from mac80211 */ 3405 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3406 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3407 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3408 seq.tkip.iv32, p1k, 0, key_offset, 3409 mfp); 3410 break; 3411 case WLAN_CIPHER_SUITE_CCMP: 3412 case WLAN_CIPHER_SUITE_WEP40: 3413 case WLAN_CIPHER_SUITE_WEP104: 3414 case WLAN_CIPHER_SUITE_GCMP: 3415 case WLAN_CIPHER_SUITE_GCMP_256: 3416 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3417 0, NULL, 0, key_offset, mfp); 3418 break; 3419 default: 3420 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3421 0, NULL, 0, key_offset, mfp); 3422 } 3423 3424 return ret; 3425 } 3426 3427 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3428 struct ieee80211_vif *vif, 3429 struct ieee80211_sta *sta, 3430 struct ieee80211_key_conf *keyconf, 3431 u8 key_offset) 3432 { 3433 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3434 struct iwl_mvm_sta *mvm_sta; 3435 u8 sta_id = IWL_MVM_INVALID_STA; 3436 int ret; 3437 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3438 3439 lockdep_assert_held(&mvm->mutex); 3440 3441 if (vif->type != NL80211_IFTYPE_AP || 3442 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3443 /* Get the station id from the mvm local station table */ 3444 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3445 if (!mvm_sta) { 3446 IWL_ERR(mvm, "Failed to find station\n"); 3447 return -EINVAL; 3448 } 3449 sta_id = mvm_sta->sta_id; 3450 3451 /* 3452 * It is possible that the 'sta' parameter is NULL, and thus 3453 * there is a need to retrieve the sta from the local station 3454 * table. 3455 */ 3456 if (!sta) { 3457 sta = rcu_dereference_protected( 3458 mvm->fw_id_to_mac_id[sta_id], 3459 lockdep_is_held(&mvm->mutex)); 3460 if (IS_ERR_OR_NULL(sta)) { 3461 IWL_ERR(mvm, "Invalid station id\n"); 3462 return -EINVAL; 3463 } 3464 } 3465 3466 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3467 return -EINVAL; 3468 } else { 3469 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3470 3471 sta_id = mvmvif->mcast_sta.sta_id; 3472 } 3473 3474 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3475 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3476 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3477 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3478 goto end; 3479 } 3480 3481 /* If the key_offset is not pre-assigned, we need to find a 3482 * new offset to use. In normal cases, the offset is not 3483 * pre-assigned, but during HW_RESTART we want to reuse the 3484 * same indices, so we pass them when this function is called. 3485 * 3486 * In D3 entry, we need to hardcoded the indices (because the 3487 * firmware hardcodes the PTK offset to 0). In this case, we 3488 * need to make sure we don't overwrite the hw_key_idx in the 3489 * keyconf structure, because otherwise we cannot configure 3490 * the original ones back when resuming. 3491 */ 3492 if (key_offset == STA_KEY_IDX_INVALID) { 3493 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3494 if (key_offset == STA_KEY_IDX_INVALID) 3495 return -ENOSPC; 3496 keyconf->hw_key_idx = key_offset; 3497 } 3498 3499 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3500 if (ret) 3501 goto end; 3502 3503 /* 3504 * For WEP, the same key is used for multicast and unicast. Upload it 3505 * again, using the same key offset, and now pointing the other one 3506 * to the same key slot (offset). 3507 * If this fails, remove the original as well. 3508 */ 3509 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3510 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3511 sta) { 3512 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3513 key_offset, !mcast); 3514 if (ret) { 3515 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3516 goto end; 3517 } 3518 } 3519 3520 __set_bit(key_offset, mvm->fw_key_table); 3521 3522 end: 3523 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3524 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3525 sta ? sta->addr : zero_addr, ret); 3526 return ret; 3527 } 3528 3529 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3530 struct ieee80211_vif *vif, 3531 struct ieee80211_sta *sta, 3532 struct ieee80211_key_conf *keyconf) 3533 { 3534 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3535 struct iwl_mvm_sta *mvm_sta; 3536 u8 sta_id = IWL_MVM_INVALID_STA; 3537 int ret, i; 3538 3539 lockdep_assert_held(&mvm->mutex); 3540 3541 /* Get the station from the mvm local station table */ 3542 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3543 if (mvm_sta) 3544 sta_id = mvm_sta->sta_id; 3545 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3546 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3547 3548 3549 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3550 keyconf->keyidx, sta_id); 3551 3552 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3553 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3554 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3555 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3556 3557 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3558 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3559 keyconf->hw_key_idx); 3560 return -ENOENT; 3561 } 3562 3563 /* track which key was deleted last */ 3564 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3565 if (mvm->fw_key_deleted[i] < U8_MAX) 3566 mvm->fw_key_deleted[i]++; 3567 } 3568 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3569 3570 if (sta && !mvm_sta) { 3571 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3572 return 0; 3573 } 3574 3575 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3576 if (ret) 3577 return ret; 3578 3579 /* delete WEP key twice to get rid of (now useless) offset */ 3580 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3581 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3582 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3583 3584 return ret; 3585 } 3586 3587 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3588 struct ieee80211_vif *vif, 3589 struct ieee80211_key_conf *keyconf, 3590 struct ieee80211_sta *sta, u32 iv32, 3591 u16 *phase1key) 3592 { 3593 struct iwl_mvm_sta *mvm_sta; 3594 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3595 bool mfp = sta ? sta->mfp : false; 3596 3597 rcu_read_lock(); 3598 3599 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3600 if (WARN_ON_ONCE(!mvm_sta)) 3601 goto unlock; 3602 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3603 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3604 mfp); 3605 3606 unlock: 3607 rcu_read_unlock(); 3608 } 3609 3610 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3611 struct ieee80211_sta *sta) 3612 { 3613 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3614 struct iwl_mvm_add_sta_cmd cmd = { 3615 .add_modify = STA_MODE_MODIFY, 3616 .sta_id = mvmsta->sta_id, 3617 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3618 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3619 }; 3620 int ret; 3621 3622 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3623 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3624 if (ret) 3625 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3626 } 3627 3628 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3629 struct ieee80211_sta *sta, 3630 enum ieee80211_frame_release_type reason, 3631 u16 cnt, u16 tids, bool more_data, 3632 bool single_sta_queue) 3633 { 3634 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3635 struct iwl_mvm_add_sta_cmd cmd = { 3636 .add_modify = STA_MODE_MODIFY, 3637 .sta_id = mvmsta->sta_id, 3638 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3639 .sleep_tx_count = cpu_to_le16(cnt), 3640 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3641 }; 3642 int tid, ret; 3643 unsigned long _tids = tids; 3644 3645 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3646 * Note that this field is reserved and unused by firmware not 3647 * supporting GO uAPSD, so it's safe to always do this. 3648 */ 3649 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3650 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3651 3652 /* If we're releasing frames from aggregation or dqa queues then check 3653 * if all the queues that we're releasing frames from, combined, have: 3654 * - more frames than the service period, in which case more_data 3655 * needs to be set 3656 * - fewer than 'cnt' frames, in which case we need to adjust the 3657 * firmware command (but do that unconditionally) 3658 */ 3659 if (single_sta_queue) { 3660 int remaining = cnt; 3661 int sleep_tx_count; 3662 3663 spin_lock_bh(&mvmsta->lock); 3664 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3665 struct iwl_mvm_tid_data *tid_data; 3666 u16 n_queued; 3667 3668 tid_data = &mvmsta->tid_data[tid]; 3669 3670 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3671 if (n_queued > remaining) { 3672 more_data = true; 3673 remaining = 0; 3674 break; 3675 } 3676 remaining -= n_queued; 3677 } 3678 sleep_tx_count = cnt - remaining; 3679 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3680 mvmsta->sleep_tx_count = sleep_tx_count; 3681 spin_unlock_bh(&mvmsta->lock); 3682 3683 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3684 if (WARN_ON(cnt - remaining == 0)) { 3685 ieee80211_sta_eosp(sta); 3686 return; 3687 } 3688 } 3689 3690 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3691 if (more_data) 3692 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3693 3694 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3695 mvmsta->next_status_eosp = true; 3696 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3697 } else { 3698 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3699 } 3700 3701 /* block the Tx queues until the FW updated the sleep Tx count */ 3702 iwl_trans_block_txq_ptrs(mvm->trans, true); 3703 3704 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3705 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3706 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3707 if (ret) 3708 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3709 } 3710 3711 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3712 struct iwl_rx_cmd_buffer *rxb) 3713 { 3714 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3715 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3716 struct ieee80211_sta *sta; 3717 u32 sta_id = le32_to_cpu(notif->sta_id); 3718 3719 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3720 return; 3721 3722 rcu_read_lock(); 3723 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3724 if (!IS_ERR_OR_NULL(sta)) 3725 ieee80211_sta_eosp(sta); 3726 rcu_read_unlock(); 3727 } 3728 3729 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3730 struct iwl_mvm_sta *mvmsta, bool disable) 3731 { 3732 struct iwl_mvm_add_sta_cmd cmd = { 3733 .add_modify = STA_MODE_MODIFY, 3734 .sta_id = mvmsta->sta_id, 3735 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3736 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3737 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3738 }; 3739 int ret; 3740 3741 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3742 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3743 if (ret) 3744 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3745 } 3746 3747 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3748 struct ieee80211_sta *sta, 3749 bool disable) 3750 { 3751 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3752 3753 spin_lock_bh(&mvm_sta->lock); 3754 3755 if (mvm_sta->disable_tx == disable) { 3756 spin_unlock_bh(&mvm_sta->lock); 3757 return; 3758 } 3759 3760 mvm_sta->disable_tx = disable; 3761 3762 /* Tell mac80211 to start/stop queuing tx for this station */ 3763 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3764 3765 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3766 3767 spin_unlock_bh(&mvm_sta->lock); 3768 } 3769 3770 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3771 struct iwl_mvm_vif *mvmvif, 3772 struct iwl_mvm_int_sta *sta, 3773 bool disable) 3774 { 3775 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3776 struct iwl_mvm_add_sta_cmd cmd = { 3777 .add_modify = STA_MODE_MODIFY, 3778 .sta_id = sta->sta_id, 3779 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3780 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3781 .mac_id_n_color = cpu_to_le32(id), 3782 }; 3783 int ret; 3784 3785 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3786 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3787 if (ret) 3788 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3789 } 3790 3791 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3792 struct iwl_mvm_vif *mvmvif, 3793 bool disable) 3794 { 3795 struct ieee80211_sta *sta; 3796 struct iwl_mvm_sta *mvm_sta; 3797 int i; 3798 3799 lockdep_assert_held(&mvm->mutex); 3800 3801 /* Block/unblock all the stations of the given mvmvif */ 3802 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3803 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3804 lockdep_is_held(&mvm->mutex)); 3805 if (IS_ERR_OR_NULL(sta)) 3806 continue; 3807 3808 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3809 if (mvm_sta->mac_id_n_color != 3810 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3811 continue; 3812 3813 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3814 } 3815 3816 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3817 return; 3818 3819 /* Need to block/unblock also multicast station */ 3820 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3821 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3822 &mvmvif->mcast_sta, disable); 3823 3824 /* 3825 * Only unblock the broadcast station (FW blocks it for immediate 3826 * quiet, not the driver) 3827 */ 3828 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3829 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3830 &mvmvif->bcast_sta, disable); 3831 } 3832 3833 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3834 { 3835 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3836 struct iwl_mvm_sta *mvmsta; 3837 3838 rcu_read_lock(); 3839 3840 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3841 3842 if (!WARN_ON(!mvmsta)) 3843 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3844 3845 rcu_read_unlock(); 3846 } 3847 3848 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3849 { 3850 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3851 3852 /* 3853 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3854 * to align the wrap around of ssn so we compare relevant values. 3855 */ 3856 if (mvm->trans->trans_cfg->gen2) 3857 sn &= 0xff; 3858 3859 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3860 } 3861