1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 - 2019 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 - 2019 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 #include <net/mac80211.h> 65 66 #include "mvm.h" 67 #include "sta.h" 68 #include "rs.h" 69 70 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm); 71 72 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 73 u32 sta_id, 74 struct ieee80211_key_conf *key, bool mcast, 75 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 76 u8 key_offset, bool mfp); 77 78 /* 79 * New version of ADD_STA_sta command added new fields at the end of the 80 * structure, so sending the size of the relevant API's structure is enough to 81 * support both API versions. 82 */ 83 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 84 { 85 if (iwl_mvm_has_new_rx_api(mvm) || 86 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 87 return sizeof(struct iwl_mvm_add_sta_cmd); 88 else 89 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 90 } 91 92 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 93 enum nl80211_iftype iftype) 94 { 95 int sta_id; 96 u32 reserved_ids = 0; 97 98 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 99 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 100 101 lockdep_assert_held(&mvm->mutex); 102 103 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 104 if (iftype != NL80211_IFTYPE_STATION) 105 reserved_ids = BIT(0); 106 107 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 108 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 109 if (BIT(sta_id) & reserved_ids) 110 continue; 111 112 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 113 lockdep_is_held(&mvm->mutex))) 114 return sta_id; 115 } 116 return IWL_MVM_INVALID_STA; 117 } 118 119 /* send station add/update command to firmware */ 120 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 121 bool update, unsigned int flags) 122 { 123 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 124 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 125 .sta_id = mvm_sta->sta_id, 126 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 127 .add_modify = update ? 1 : 0, 128 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 129 STA_FLG_MIMO_EN_MSK | 130 STA_FLG_RTS_MIMO_PROT), 131 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 132 }; 133 int ret; 134 u32 status; 135 u32 agg_size = 0, mpdu_dens = 0; 136 137 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 138 add_sta_cmd.station_type = mvm_sta->sta_type; 139 140 if (!update || (flags & STA_MODIFY_QUEUES)) { 141 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 142 143 if (!iwl_mvm_has_new_tx_api(mvm)) { 144 add_sta_cmd.tfd_queue_msk = 145 cpu_to_le32(mvm_sta->tfd_queue_msk); 146 147 if (flags & STA_MODIFY_QUEUES) 148 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 149 } else { 150 WARN_ON(flags & STA_MODIFY_QUEUES); 151 } 152 } 153 154 switch (sta->bandwidth) { 155 case IEEE80211_STA_RX_BW_160: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 157 /* fall through */ 158 case IEEE80211_STA_RX_BW_80: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 160 /* fall through */ 161 case IEEE80211_STA_RX_BW_40: 162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 163 /* fall through */ 164 case IEEE80211_STA_RX_BW_20: 165 if (sta->ht_cap.ht_supported) 166 add_sta_cmd.station_flags |= 167 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 168 break; 169 } 170 171 switch (sta->rx_nss) { 172 case 1: 173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 174 break; 175 case 2: 176 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 177 break; 178 case 3 ... 8: 179 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 180 break; 181 } 182 183 switch (sta->smps_mode) { 184 case IEEE80211_SMPS_AUTOMATIC: 185 case IEEE80211_SMPS_NUM_MODES: 186 WARN_ON(1); 187 break; 188 case IEEE80211_SMPS_STATIC: 189 /* override NSS */ 190 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 191 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 192 break; 193 case IEEE80211_SMPS_DYNAMIC: 194 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 195 break; 196 case IEEE80211_SMPS_OFF: 197 /* nothing */ 198 break; 199 } 200 201 if (sta->ht_cap.ht_supported) { 202 add_sta_cmd.station_flags_msk |= 203 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 204 STA_FLG_AGG_MPDU_DENS_MSK); 205 206 mpdu_dens = sta->ht_cap.ampdu_density; 207 } 208 209 if (sta->vht_cap.vht_supported) { 210 agg_size = sta->vht_cap.cap & 211 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 212 agg_size >>= 213 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 214 } else if (sta->ht_cap.ht_supported) { 215 agg_size = sta->ht_cap.ampdu_factor; 216 } 217 218 add_sta_cmd.station_flags |= 219 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 220 add_sta_cmd.station_flags |= 221 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 222 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 223 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 224 225 if (sta->wme) { 226 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 227 228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 229 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 230 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 231 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 232 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 233 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 234 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 235 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 236 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 237 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 238 } 239 240 status = ADD_STA_SUCCESS; 241 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 242 iwl_mvm_add_sta_cmd_size(mvm), 243 &add_sta_cmd, &status); 244 if (ret) 245 return ret; 246 247 switch (status & IWL_ADD_STA_STATUS_MASK) { 248 case ADD_STA_SUCCESS: 249 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 250 break; 251 default: 252 ret = -EIO; 253 IWL_ERR(mvm, "ADD_STA failed\n"); 254 break; 255 } 256 257 return ret; 258 } 259 260 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 261 { 262 struct iwl_mvm_baid_data *data = 263 from_timer(data, t, session_timer); 264 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 265 struct iwl_mvm_baid_data *ba_data; 266 struct ieee80211_sta *sta; 267 struct iwl_mvm_sta *mvm_sta; 268 unsigned long timeout; 269 270 rcu_read_lock(); 271 272 ba_data = rcu_dereference(*rcu_ptr); 273 274 if (WARN_ON(!ba_data)) 275 goto unlock; 276 277 if (!ba_data->timeout) 278 goto unlock; 279 280 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 281 if (time_is_after_jiffies(timeout)) { 282 mod_timer(&ba_data->session_timer, timeout); 283 goto unlock; 284 } 285 286 /* Timer expired */ 287 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 288 289 /* 290 * sta should be valid unless the following happens: 291 * The firmware asserts which triggers a reconfig flow, but 292 * the reconfig fails before we set the pointer to sta into 293 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 294 * A-MDPU and hence the timer continues to run. Then, the 295 * timer expires and sta is NULL. 296 */ 297 if (!sta) 298 goto unlock; 299 300 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 301 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 302 sta->addr, ba_data->tid); 303 unlock: 304 rcu_read_unlock(); 305 } 306 307 /* Disable aggregations for a bitmap of TIDs for a given station */ 308 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 309 unsigned long disable_agg_tids, 310 bool remove_queue) 311 { 312 struct iwl_mvm_add_sta_cmd cmd = {}; 313 struct ieee80211_sta *sta; 314 struct iwl_mvm_sta *mvmsta; 315 u32 status; 316 u8 sta_id; 317 318 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 319 return -EINVAL; 320 321 sta_id = mvm->queue_info[queue].ra_sta_id; 322 323 rcu_read_lock(); 324 325 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 326 327 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 328 rcu_read_unlock(); 329 return -EINVAL; 330 } 331 332 mvmsta = iwl_mvm_sta_from_mac80211(sta); 333 334 mvmsta->tid_disable_agg |= disable_agg_tids; 335 336 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 337 cmd.sta_id = mvmsta->sta_id; 338 cmd.add_modify = STA_MODE_MODIFY; 339 cmd.modify_mask = STA_MODIFY_QUEUES; 340 if (disable_agg_tids) 341 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 342 if (remove_queue) 343 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 344 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 345 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 346 347 rcu_read_unlock(); 348 349 /* Notify FW of queue removal from the STA queues */ 350 status = ADD_STA_SUCCESS; 351 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 352 iwl_mvm_add_sta_cmd_size(mvm), 353 &cmd, &status); 354 } 355 356 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 357 int queue, u8 tid, u8 flags) 358 { 359 struct iwl_scd_txq_cfg_cmd cmd = { 360 .scd_queue = queue, 361 .action = SCD_CFG_DISABLE_QUEUE, 362 }; 363 int ret; 364 365 if (iwl_mvm_has_new_tx_api(mvm)) { 366 iwl_trans_txq_free(mvm->trans, queue); 367 368 return 0; 369 } 370 371 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 372 return 0; 373 374 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 375 376 cmd.action = mvm->queue_info[queue].tid_bitmap ? 377 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 378 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 379 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 380 381 IWL_DEBUG_TX_QUEUES(mvm, 382 "Disabling TXQ #%d tids=0x%x\n", 383 queue, 384 mvm->queue_info[queue].tid_bitmap); 385 386 /* If the queue is still enabled - nothing left to do in this func */ 387 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 388 return 0; 389 390 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 391 cmd.tid = mvm->queue_info[queue].txq_tid; 392 393 /* Make sure queue info is correct even though we overwrite it */ 394 WARN(mvm->queue_info[queue].tid_bitmap, 395 "TXQ #%d info out-of-sync - tids=0x%x\n", 396 queue, mvm->queue_info[queue].tid_bitmap); 397 398 /* If we are here - the queue is freed and we can zero out these vals */ 399 mvm->queue_info[queue].tid_bitmap = 0; 400 401 if (sta) { 402 struct iwl_mvm_txq *mvmtxq = 403 iwl_mvm_txq_from_tid(sta, tid); 404 405 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 406 } 407 408 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 409 mvm->queue_info[queue].reserved = false; 410 411 iwl_trans_txq_disable(mvm->trans, queue, false); 412 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 413 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 414 415 if (ret) 416 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 417 queue, ret); 418 return ret; 419 } 420 421 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 422 { 423 struct ieee80211_sta *sta; 424 struct iwl_mvm_sta *mvmsta; 425 unsigned long tid_bitmap; 426 unsigned long agg_tids = 0; 427 u8 sta_id; 428 int tid; 429 430 lockdep_assert_held(&mvm->mutex); 431 432 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 433 return -EINVAL; 434 435 sta_id = mvm->queue_info[queue].ra_sta_id; 436 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 437 438 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 439 lockdep_is_held(&mvm->mutex)); 440 441 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 442 return -EINVAL; 443 444 mvmsta = iwl_mvm_sta_from_mac80211(sta); 445 446 spin_lock_bh(&mvmsta->lock); 447 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 448 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 449 agg_tids |= BIT(tid); 450 } 451 spin_unlock_bh(&mvmsta->lock); 452 453 return agg_tids; 454 } 455 456 /* 457 * Remove a queue from a station's resources. 458 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 459 * doesn't disable the queue 460 */ 461 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 462 { 463 struct ieee80211_sta *sta; 464 struct iwl_mvm_sta *mvmsta; 465 unsigned long tid_bitmap; 466 unsigned long disable_agg_tids = 0; 467 u8 sta_id; 468 int tid; 469 470 lockdep_assert_held(&mvm->mutex); 471 472 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 473 return -EINVAL; 474 475 sta_id = mvm->queue_info[queue].ra_sta_id; 476 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 477 478 rcu_read_lock(); 479 480 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 481 482 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 483 rcu_read_unlock(); 484 return 0; 485 } 486 487 mvmsta = iwl_mvm_sta_from_mac80211(sta); 488 489 spin_lock_bh(&mvmsta->lock); 490 /* Unmap MAC queues and TIDs from this queue */ 491 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 492 struct iwl_mvm_txq *mvmtxq = 493 iwl_mvm_txq_from_tid(sta, tid); 494 495 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 496 disable_agg_tids |= BIT(tid); 497 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 498 499 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 500 } 501 502 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 503 spin_unlock_bh(&mvmsta->lock); 504 505 rcu_read_unlock(); 506 507 /* 508 * The TX path may have been using this TXQ_ID from the tid_data, 509 * so make sure it's no longer running so that we can safely reuse 510 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 511 * above, but nothing guarantees we've stopped using them. Thus, 512 * without this, we could get to iwl_mvm_disable_txq() and remove 513 * the queue while still sending frames to it. 514 */ 515 synchronize_net(); 516 517 return disable_agg_tids; 518 } 519 520 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 521 struct ieee80211_sta *old_sta, 522 u8 new_sta_id) 523 { 524 struct iwl_mvm_sta *mvmsta; 525 u8 sta_id, tid; 526 unsigned long disable_agg_tids = 0; 527 bool same_sta; 528 int ret; 529 530 lockdep_assert_held(&mvm->mutex); 531 532 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 533 return -EINVAL; 534 535 sta_id = mvm->queue_info[queue].ra_sta_id; 536 tid = mvm->queue_info[queue].txq_tid; 537 538 same_sta = sta_id == new_sta_id; 539 540 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 541 if (WARN_ON(!mvmsta)) 542 return -EINVAL; 543 544 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 545 /* Disable the queue */ 546 if (disable_agg_tids) 547 iwl_mvm_invalidate_sta_queue(mvm, queue, 548 disable_agg_tids, false); 549 550 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 551 if (ret) { 552 IWL_ERR(mvm, 553 "Failed to free inactive queue %d (ret=%d)\n", 554 queue, ret); 555 556 return ret; 557 } 558 559 /* If TXQ is allocated to another STA, update removal in FW */ 560 if (!same_sta) 561 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 562 563 return 0; 564 } 565 566 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 567 unsigned long tfd_queue_mask, u8 ac) 568 { 569 int queue = 0; 570 u8 ac_to_queue[IEEE80211_NUM_ACS]; 571 int i; 572 573 /* 574 * This protects us against grabbing a queue that's being reconfigured 575 * by the inactivity checker. 576 */ 577 lockdep_assert_held(&mvm->mutex); 578 579 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 580 return -EINVAL; 581 582 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 583 584 /* See what ACs the existing queues for this STA have */ 585 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 586 /* Only DATA queues can be shared */ 587 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 588 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 589 continue; 590 591 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 592 } 593 594 /* 595 * The queue to share is chosen only from DATA queues as follows (in 596 * descending priority): 597 * 1. An AC_BE queue 598 * 2. Same AC queue 599 * 3. Highest AC queue that is lower than new AC 600 * 4. Any existing AC (there always is at least 1 DATA queue) 601 */ 602 603 /* Priority 1: An AC_BE queue */ 604 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 605 queue = ac_to_queue[IEEE80211_AC_BE]; 606 /* Priority 2: Same AC queue */ 607 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 608 queue = ac_to_queue[ac]; 609 /* Priority 3a: If new AC is VO and VI exists - use VI */ 610 else if (ac == IEEE80211_AC_VO && 611 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 612 queue = ac_to_queue[IEEE80211_AC_VI]; 613 /* Priority 3b: No BE so only AC less than the new one is BK */ 614 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 615 queue = ac_to_queue[IEEE80211_AC_BK]; 616 /* Priority 4a: No BE nor BK - use VI if exists */ 617 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 618 queue = ac_to_queue[IEEE80211_AC_VI]; 619 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 620 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 621 queue = ac_to_queue[IEEE80211_AC_VO]; 622 623 /* Make sure queue found (or not) is legal */ 624 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 625 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 626 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 627 IWL_ERR(mvm, "No DATA queues available to share\n"); 628 return -ENOSPC; 629 } 630 631 return queue; 632 } 633 634 /* 635 * If a given queue has a higher AC than the TID stream that is being compared 636 * to, the queue needs to be redirected to the lower AC. This function does that 637 * in such a case, otherwise - if no redirection required - it does nothing, 638 * unless the %force param is true. 639 */ 640 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 641 int ac, int ssn, unsigned int wdg_timeout, 642 bool force, struct iwl_mvm_txq *txq) 643 { 644 struct iwl_scd_txq_cfg_cmd cmd = { 645 .scd_queue = queue, 646 .action = SCD_CFG_DISABLE_QUEUE, 647 }; 648 bool shared_queue; 649 int ret; 650 651 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 652 return -EINVAL; 653 654 /* 655 * If the AC is lower than current one - FIFO needs to be redirected to 656 * the lowest one of the streams in the queue. Check if this is needed 657 * here. 658 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 659 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 660 * we need to check if the numerical value of X is LARGER than of Y. 661 */ 662 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 663 IWL_DEBUG_TX_QUEUES(mvm, 664 "No redirection needed on TXQ #%d\n", 665 queue); 666 return 0; 667 } 668 669 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 670 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 671 cmd.tid = mvm->queue_info[queue].txq_tid; 672 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 673 674 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 675 queue, iwl_mvm_ac_to_tx_fifo[ac]); 676 677 /* Stop the queue and wait for it to empty */ 678 txq->stopped = true; 679 680 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 681 if (ret) { 682 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 683 queue); 684 ret = -EIO; 685 goto out; 686 } 687 688 /* Before redirecting the queue we need to de-activate it */ 689 iwl_trans_txq_disable(mvm->trans, queue, false); 690 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 691 if (ret) 692 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 693 ret); 694 695 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 696 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 697 698 /* Update the TID "owner" of the queue */ 699 mvm->queue_info[queue].txq_tid = tid; 700 701 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 702 703 /* Redirect to lower AC */ 704 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 705 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 706 707 /* Update AC marking of the queue */ 708 mvm->queue_info[queue].mac80211_ac = ac; 709 710 /* 711 * Mark queue as shared in transport if shared 712 * Note this has to be done after queue enablement because enablement 713 * can also set this value, and there is no indication there to shared 714 * queues 715 */ 716 if (shared_queue) 717 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 718 719 out: 720 /* Continue using the queue */ 721 txq->stopped = false; 722 723 return ret; 724 } 725 726 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 727 u8 minq, u8 maxq) 728 { 729 int i; 730 731 lockdep_assert_held(&mvm->mutex); 732 733 /* This should not be hit with new TX path */ 734 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 735 return -ENOSPC; 736 737 /* Start by looking for a free queue */ 738 for (i = minq; i <= maxq; i++) 739 if (mvm->queue_info[i].tid_bitmap == 0 && 740 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 741 return i; 742 743 return -ENOSPC; 744 } 745 746 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 747 u8 sta_id, u8 tid, unsigned int timeout) 748 { 749 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE, 750 mvm->trans->cfg->min_256_ba_txq_size); 751 752 if (tid == IWL_MAX_TID_COUNT) { 753 tid = IWL_MGMT_TID; 754 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 755 mvm->trans->cfg->min_txq_size); 756 } 757 queue = iwl_trans_txq_alloc(mvm->trans, 758 cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE), 759 sta_id, tid, SCD_QUEUE_CFG, size, timeout); 760 761 if (queue < 0) { 762 IWL_DEBUG_TX_QUEUES(mvm, 763 "Failed allocating TXQ for sta %d tid %d, ret: %d\n", 764 sta_id, tid, queue); 765 return queue; 766 } 767 768 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 769 queue, sta_id, tid); 770 771 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue); 772 773 return queue; 774 } 775 776 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 777 struct ieee80211_sta *sta, u8 ac, 778 int tid) 779 { 780 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 781 struct iwl_mvm_txq *mvmtxq = 782 iwl_mvm_txq_from_tid(sta, tid); 783 unsigned int wdg_timeout = 784 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 785 int queue = -1; 786 787 lockdep_assert_held(&mvm->mutex); 788 789 IWL_DEBUG_TX_QUEUES(mvm, 790 "Allocating queue for sta %d on tid %d\n", 791 mvmsta->sta_id, tid); 792 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 793 if (queue < 0) 794 return queue; 795 796 mvmtxq->txq_id = queue; 797 mvm->tvqm_info[queue].txq_tid = tid; 798 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 799 800 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 801 802 spin_lock_bh(&mvmsta->lock); 803 mvmsta->tid_data[tid].txq_id = queue; 804 spin_unlock_bh(&mvmsta->lock); 805 806 return 0; 807 } 808 809 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 810 struct ieee80211_sta *sta, 811 int queue, u8 sta_id, u8 tid) 812 { 813 bool enable_queue = true; 814 815 /* Make sure this TID isn't already enabled */ 816 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 817 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 818 queue, tid); 819 return false; 820 } 821 822 /* Update mappings and refcounts */ 823 if (mvm->queue_info[queue].tid_bitmap) 824 enable_queue = false; 825 826 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 827 mvm->queue_info[queue].ra_sta_id = sta_id; 828 829 if (enable_queue) { 830 if (tid != IWL_MAX_TID_COUNT) 831 mvm->queue_info[queue].mac80211_ac = 832 tid_to_mac80211_ac[tid]; 833 else 834 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 835 836 mvm->queue_info[queue].txq_tid = tid; 837 } 838 839 if (sta) { 840 struct iwl_mvm_txq *mvmtxq = 841 iwl_mvm_txq_from_tid(sta, tid); 842 843 mvmtxq->txq_id = queue; 844 } 845 846 IWL_DEBUG_TX_QUEUES(mvm, 847 "Enabling TXQ #%d tids=0x%x\n", 848 queue, mvm->queue_info[queue].tid_bitmap); 849 850 return enable_queue; 851 } 852 853 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 854 int queue, u16 ssn, 855 const struct iwl_trans_txq_scd_cfg *cfg, 856 unsigned int wdg_timeout) 857 { 858 struct iwl_scd_txq_cfg_cmd cmd = { 859 .scd_queue = queue, 860 .action = SCD_CFG_ENABLE_QUEUE, 861 .window = cfg->frame_limit, 862 .sta_id = cfg->sta_id, 863 .ssn = cpu_to_le16(ssn), 864 .tx_fifo = cfg->fifo, 865 .aggregate = cfg->aggregate, 866 .tid = cfg->tid, 867 }; 868 bool inc_ssn; 869 870 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 871 return false; 872 873 /* Send the enabling command if we need to */ 874 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 875 return false; 876 877 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 878 NULL, wdg_timeout); 879 if (inc_ssn) 880 le16_add_cpu(&cmd.ssn, 1); 881 882 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 883 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 884 885 return inc_ssn; 886 } 887 888 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 889 { 890 struct iwl_scd_txq_cfg_cmd cmd = { 891 .scd_queue = queue, 892 .action = SCD_CFG_UPDATE_QUEUE_TID, 893 }; 894 int tid; 895 unsigned long tid_bitmap; 896 int ret; 897 898 lockdep_assert_held(&mvm->mutex); 899 900 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 901 return; 902 903 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 904 905 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 906 return; 907 908 /* Find any TID for queue */ 909 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 910 cmd.tid = tid; 911 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 912 913 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 914 if (ret) { 915 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 916 queue, ret); 917 return; 918 } 919 920 mvm->queue_info[queue].txq_tid = tid; 921 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 922 queue, tid); 923 } 924 925 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 926 { 927 struct ieee80211_sta *sta; 928 struct iwl_mvm_sta *mvmsta; 929 u8 sta_id; 930 int tid = -1; 931 unsigned long tid_bitmap; 932 unsigned int wdg_timeout; 933 int ssn; 934 int ret = true; 935 936 /* queue sharing is disabled on new TX path */ 937 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 938 return; 939 940 lockdep_assert_held(&mvm->mutex); 941 942 sta_id = mvm->queue_info[queue].ra_sta_id; 943 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 944 945 /* Find TID for queue, and make sure it is the only one on the queue */ 946 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 947 if (tid_bitmap != BIT(tid)) { 948 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 949 queue, tid_bitmap); 950 return; 951 } 952 953 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 954 tid); 955 956 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 957 lockdep_is_held(&mvm->mutex)); 958 959 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 960 return; 961 962 mvmsta = iwl_mvm_sta_from_mac80211(sta); 963 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 964 965 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 966 967 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 968 tid_to_mac80211_ac[tid], ssn, 969 wdg_timeout, true, 970 iwl_mvm_txq_from_tid(sta, tid)); 971 if (ret) { 972 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 973 return; 974 } 975 976 /* If aggs should be turned back on - do it */ 977 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 978 struct iwl_mvm_add_sta_cmd cmd = {0}; 979 980 mvmsta->tid_disable_agg &= ~BIT(tid); 981 982 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 983 cmd.sta_id = mvmsta->sta_id; 984 cmd.add_modify = STA_MODE_MODIFY; 985 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 986 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 987 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 988 989 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 990 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 991 if (!ret) { 992 IWL_DEBUG_TX_QUEUES(mvm, 993 "TXQ #%d is now aggregated again\n", 994 queue); 995 996 /* Mark queue intenally as aggregating again */ 997 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 998 } 999 } 1000 1001 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1002 } 1003 1004 /* 1005 * Remove inactive TIDs of a given queue. 1006 * If all queue TIDs are inactive - mark the queue as inactive 1007 * If only some the queue TIDs are inactive - unmap them from the queue 1008 * 1009 * Returns %true if all TIDs were removed and the queue could be reused. 1010 */ 1011 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1012 struct iwl_mvm_sta *mvmsta, int queue, 1013 unsigned long tid_bitmap, 1014 unsigned long *unshare_queues, 1015 unsigned long *changetid_queues) 1016 { 1017 int tid; 1018 1019 lockdep_assert_held(&mvmsta->lock); 1020 lockdep_assert_held(&mvm->mutex); 1021 1022 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1023 return false; 1024 1025 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1026 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1027 /* If some TFDs are still queued - don't mark TID as inactive */ 1028 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1029 tid_bitmap &= ~BIT(tid); 1030 1031 /* Don't mark as inactive any TID that has an active BA */ 1032 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1033 tid_bitmap &= ~BIT(tid); 1034 } 1035 1036 /* If all TIDs in the queue are inactive - return it can be reused */ 1037 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1038 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1039 return true; 1040 } 1041 1042 /* 1043 * If we are here, this is a shared queue and not all TIDs timed-out. 1044 * Remove the ones that did. 1045 */ 1046 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1047 u16 tid_bitmap; 1048 1049 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1050 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1051 1052 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1053 1054 /* 1055 * We need to take into account a situation in which a TXQ was 1056 * allocated to TID x, and then turned shared by adding TIDs y 1057 * and z. If TID x becomes inactive and is removed from the TXQ, 1058 * ownership must be given to one of the remaining TIDs. 1059 * This is mainly because if TID x continues - a new queue can't 1060 * be allocated for it as long as it is an owner of another TXQ. 1061 * 1062 * Mark this queue in the right bitmap, we'll send the command 1063 * to the firmware later. 1064 */ 1065 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1066 set_bit(queue, changetid_queues); 1067 1068 IWL_DEBUG_TX_QUEUES(mvm, 1069 "Removing inactive TID %d from shared Q:%d\n", 1070 tid, queue); 1071 } 1072 1073 IWL_DEBUG_TX_QUEUES(mvm, 1074 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1075 mvm->queue_info[queue].tid_bitmap); 1076 1077 /* 1078 * There may be different TIDs with the same mac queues, so make 1079 * sure all TIDs have existing corresponding mac queues enabled 1080 */ 1081 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1082 1083 /* If the queue is marked as shared - "unshare" it */ 1084 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1085 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1086 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1087 queue); 1088 set_bit(queue, unshare_queues); 1089 } 1090 1091 return false; 1092 } 1093 1094 /* 1095 * Check for inactivity - this includes checking if any queue 1096 * can be unshared and finding one (and only one) that can be 1097 * reused. 1098 * This function is also invoked as a sort of clean-up task, 1099 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1100 * 1101 * Returns the queue number, or -ENOSPC. 1102 */ 1103 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1104 { 1105 unsigned long now = jiffies; 1106 unsigned long unshare_queues = 0; 1107 unsigned long changetid_queues = 0; 1108 int i, ret, free_queue = -ENOSPC; 1109 struct ieee80211_sta *queue_owner = NULL; 1110 1111 lockdep_assert_held(&mvm->mutex); 1112 1113 if (iwl_mvm_has_new_tx_api(mvm)) 1114 return -ENOSPC; 1115 1116 rcu_read_lock(); 1117 1118 /* we skip the CMD queue below by starting at 1 */ 1119 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1120 1121 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1122 struct ieee80211_sta *sta; 1123 struct iwl_mvm_sta *mvmsta; 1124 u8 sta_id; 1125 int tid; 1126 unsigned long inactive_tid_bitmap = 0; 1127 unsigned long queue_tid_bitmap; 1128 1129 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1130 if (!queue_tid_bitmap) 1131 continue; 1132 1133 /* If TXQ isn't in active use anyway - nothing to do here... */ 1134 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1135 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1136 continue; 1137 1138 /* Check to see if there are inactive TIDs on this queue */ 1139 for_each_set_bit(tid, &queue_tid_bitmap, 1140 IWL_MAX_TID_COUNT + 1) { 1141 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1142 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1143 continue; 1144 1145 inactive_tid_bitmap |= BIT(tid); 1146 } 1147 1148 /* If all TIDs are active - finish check on this queue */ 1149 if (!inactive_tid_bitmap) 1150 continue; 1151 1152 /* 1153 * If we are here - the queue hadn't been served recently and is 1154 * in use 1155 */ 1156 1157 sta_id = mvm->queue_info[i].ra_sta_id; 1158 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1159 1160 /* 1161 * If the STA doesn't exist anymore, it isn't an error. It could 1162 * be that it was removed since getting the queues, and in this 1163 * case it should've inactivated its queues anyway. 1164 */ 1165 if (IS_ERR_OR_NULL(sta)) 1166 continue; 1167 1168 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1169 1170 spin_lock_bh(&mvmsta->lock); 1171 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1172 inactive_tid_bitmap, 1173 &unshare_queues, 1174 &changetid_queues); 1175 if (ret >= 0 && free_queue < 0) { 1176 queue_owner = sta; 1177 free_queue = ret; 1178 } 1179 /* only unlock sta lock - we still need the queue info lock */ 1180 spin_unlock_bh(&mvmsta->lock); 1181 } 1182 1183 1184 /* Reconfigure queues requiring reconfiguation */ 1185 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1186 iwl_mvm_unshare_queue(mvm, i); 1187 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1188 iwl_mvm_change_queue_tid(mvm, i); 1189 1190 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1191 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1192 alloc_for_sta); 1193 if (ret) { 1194 rcu_read_unlock(); 1195 return ret; 1196 } 1197 } 1198 1199 rcu_read_unlock(); 1200 1201 return free_queue; 1202 } 1203 1204 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1205 struct ieee80211_sta *sta, u8 ac, int tid) 1206 { 1207 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1208 struct iwl_trans_txq_scd_cfg cfg = { 1209 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1210 .sta_id = mvmsta->sta_id, 1211 .tid = tid, 1212 .frame_limit = IWL_FRAME_LIMIT, 1213 }; 1214 unsigned int wdg_timeout = 1215 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1216 int queue = -1; 1217 unsigned long disable_agg_tids = 0; 1218 enum iwl_mvm_agg_state queue_state; 1219 bool shared_queue = false, inc_ssn; 1220 int ssn; 1221 unsigned long tfd_queue_mask; 1222 int ret; 1223 1224 lockdep_assert_held(&mvm->mutex); 1225 1226 if (iwl_mvm_has_new_tx_api(mvm)) 1227 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1228 1229 spin_lock_bh(&mvmsta->lock); 1230 tfd_queue_mask = mvmsta->tfd_queue_msk; 1231 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1232 spin_unlock_bh(&mvmsta->lock); 1233 1234 if (tid == IWL_MAX_TID_COUNT) { 1235 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1236 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1237 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1238 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1239 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1240 queue); 1241 1242 /* If no such queue is found, we'll use a DATA queue instead */ 1243 } 1244 1245 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1246 (mvm->queue_info[mvmsta->reserved_queue].status == 1247 IWL_MVM_QUEUE_RESERVED)) { 1248 queue = mvmsta->reserved_queue; 1249 mvm->queue_info[queue].reserved = true; 1250 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1251 } 1252 1253 if (queue < 0) 1254 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1255 IWL_MVM_DQA_MIN_DATA_QUEUE, 1256 IWL_MVM_DQA_MAX_DATA_QUEUE); 1257 if (queue < 0) { 1258 /* try harder - perhaps kill an inactive queue */ 1259 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1260 } 1261 1262 /* No free queue - we'll have to share */ 1263 if (queue <= 0) { 1264 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1265 if (queue > 0) { 1266 shared_queue = true; 1267 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1268 } 1269 } 1270 1271 /* 1272 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1273 * to make sure no one else takes it. 1274 * This will allow avoiding re-acquiring the lock at the end of the 1275 * configuration. On error we'll mark it back as free. 1276 */ 1277 if (queue > 0 && !shared_queue) 1278 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1279 1280 /* This shouldn't happen - out of queues */ 1281 if (WARN_ON(queue <= 0)) { 1282 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1283 tid, cfg.sta_id); 1284 return queue; 1285 } 1286 1287 /* 1288 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1289 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1290 * as aggregatable. 1291 * Mark all DATA queues as allowing to be aggregated at some point 1292 */ 1293 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1294 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1295 1296 IWL_DEBUG_TX_QUEUES(mvm, 1297 "Allocating %squeue #%d to sta %d on tid %d\n", 1298 shared_queue ? "shared " : "", queue, 1299 mvmsta->sta_id, tid); 1300 1301 if (shared_queue) { 1302 /* Disable any open aggs on this queue */ 1303 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1304 1305 if (disable_agg_tids) { 1306 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1307 queue); 1308 iwl_mvm_invalidate_sta_queue(mvm, queue, 1309 disable_agg_tids, false); 1310 } 1311 } 1312 1313 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1314 1315 /* 1316 * Mark queue as shared in transport if shared 1317 * Note this has to be done after queue enablement because enablement 1318 * can also set this value, and there is no indication there to shared 1319 * queues 1320 */ 1321 if (shared_queue) 1322 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1323 1324 spin_lock_bh(&mvmsta->lock); 1325 /* 1326 * This looks racy, but it is not. We have only one packet for 1327 * this ra/tid in our Tx path since we stop the Qdisc when we 1328 * need to allocate a new TFD queue. 1329 */ 1330 if (inc_ssn) { 1331 mvmsta->tid_data[tid].seq_number += 0x10; 1332 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1333 } 1334 mvmsta->tid_data[tid].txq_id = queue; 1335 mvmsta->tfd_queue_msk |= BIT(queue); 1336 queue_state = mvmsta->tid_data[tid].state; 1337 1338 if (mvmsta->reserved_queue == queue) 1339 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1340 spin_unlock_bh(&mvmsta->lock); 1341 1342 if (!shared_queue) { 1343 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1344 if (ret) 1345 goto out_err; 1346 1347 /* If we need to re-enable aggregations... */ 1348 if (queue_state == IWL_AGG_ON) { 1349 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1350 if (ret) 1351 goto out_err; 1352 } 1353 } else { 1354 /* Redirect queue, if needed */ 1355 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1356 wdg_timeout, false, 1357 iwl_mvm_txq_from_tid(sta, tid)); 1358 if (ret) 1359 goto out_err; 1360 } 1361 1362 return 0; 1363 1364 out_err: 1365 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1366 1367 return ret; 1368 } 1369 1370 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1371 { 1372 if (tid == IWL_MAX_TID_COUNT) 1373 return IEEE80211_AC_VO; /* MGMT */ 1374 1375 return tid_to_mac80211_ac[tid]; 1376 } 1377 1378 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1379 { 1380 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1381 add_stream_wk); 1382 1383 mutex_lock(&mvm->mutex); 1384 1385 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1386 1387 while (!list_empty(&mvm->add_stream_txqs)) { 1388 struct iwl_mvm_txq *mvmtxq; 1389 struct ieee80211_txq *txq; 1390 u8 tid; 1391 1392 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1393 struct iwl_mvm_txq, list); 1394 1395 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1396 drv_priv); 1397 tid = txq->tid; 1398 if (tid == IEEE80211_NUM_TIDS) 1399 tid = IWL_MAX_TID_COUNT; 1400 1401 iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid); 1402 list_del_init(&mvmtxq->list); 1403 local_bh_disable(); 1404 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1405 local_bh_enable(); 1406 } 1407 1408 mutex_unlock(&mvm->mutex); 1409 } 1410 1411 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1412 struct ieee80211_sta *sta, 1413 enum nl80211_iftype vif_type) 1414 { 1415 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1416 int queue; 1417 1418 /* queue reserving is disabled on new TX path */ 1419 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1420 return 0; 1421 1422 /* run the general cleanup/unsharing of queues */ 1423 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1424 1425 /* Make sure we have free resources for this STA */ 1426 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1427 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1428 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1429 IWL_MVM_QUEUE_FREE)) 1430 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1431 else 1432 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1433 IWL_MVM_DQA_MIN_DATA_QUEUE, 1434 IWL_MVM_DQA_MAX_DATA_QUEUE); 1435 if (queue < 0) { 1436 /* try again - this time kick out a queue if needed */ 1437 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1438 if (queue < 0) { 1439 IWL_ERR(mvm, "No available queues for new station\n"); 1440 return -ENOSPC; 1441 } 1442 } 1443 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1444 1445 mvmsta->reserved_queue = queue; 1446 1447 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1448 queue, mvmsta->sta_id); 1449 1450 return 0; 1451 } 1452 1453 /* 1454 * In DQA mode, after a HW restart the queues should be allocated as before, in 1455 * order to avoid race conditions when there are shared queues. This function 1456 * does the re-mapping and queue allocation. 1457 * 1458 * Note that re-enabling aggregations isn't done in this function. 1459 */ 1460 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1461 struct ieee80211_sta *sta) 1462 { 1463 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1464 unsigned int wdg = 1465 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1466 int i; 1467 struct iwl_trans_txq_scd_cfg cfg = { 1468 .sta_id = mvm_sta->sta_id, 1469 .frame_limit = IWL_FRAME_LIMIT, 1470 }; 1471 1472 /* Make sure reserved queue is still marked as such (if allocated) */ 1473 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1474 mvm->queue_info[mvm_sta->reserved_queue].status = 1475 IWL_MVM_QUEUE_RESERVED; 1476 1477 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1478 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1479 int txq_id = tid_data->txq_id; 1480 int ac; 1481 1482 if (txq_id == IWL_MVM_INVALID_QUEUE) 1483 continue; 1484 1485 ac = tid_to_mac80211_ac[i]; 1486 1487 if (iwl_mvm_has_new_tx_api(mvm)) { 1488 IWL_DEBUG_TX_QUEUES(mvm, 1489 "Re-mapping sta %d tid %d\n", 1490 mvm_sta->sta_id, i); 1491 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1492 i, wdg); 1493 tid_data->txq_id = txq_id; 1494 1495 /* 1496 * Since we don't set the seq number after reset, and HW 1497 * sets it now, FW reset will cause the seq num to start 1498 * at 0 again, so driver will need to update it 1499 * internally as well, so it keeps in sync with real val 1500 */ 1501 tid_data->seq_number = 0; 1502 } else { 1503 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1504 1505 cfg.tid = i; 1506 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1507 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1508 txq_id == 1509 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1510 1511 IWL_DEBUG_TX_QUEUES(mvm, 1512 "Re-mapping sta %d tid %d to queue %d\n", 1513 mvm_sta->sta_id, i, txq_id); 1514 1515 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1516 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1517 } 1518 } 1519 } 1520 1521 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1522 struct iwl_mvm_int_sta *sta, 1523 const u8 *addr, 1524 u16 mac_id, u16 color) 1525 { 1526 struct iwl_mvm_add_sta_cmd cmd; 1527 int ret; 1528 u32 status = ADD_STA_SUCCESS; 1529 1530 lockdep_assert_held(&mvm->mutex); 1531 1532 memset(&cmd, 0, sizeof(cmd)); 1533 cmd.sta_id = sta->sta_id; 1534 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1535 color)); 1536 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1537 cmd.station_type = sta->type; 1538 1539 if (!iwl_mvm_has_new_tx_api(mvm)) 1540 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1541 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1542 1543 if (addr) 1544 memcpy(cmd.addr, addr, ETH_ALEN); 1545 1546 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1547 iwl_mvm_add_sta_cmd_size(mvm), 1548 &cmd, &status); 1549 if (ret) 1550 return ret; 1551 1552 switch (status & IWL_ADD_STA_STATUS_MASK) { 1553 case ADD_STA_SUCCESS: 1554 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1555 return 0; 1556 default: 1557 ret = -EIO; 1558 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1559 status); 1560 break; 1561 } 1562 return ret; 1563 } 1564 1565 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1566 struct ieee80211_vif *vif, 1567 struct ieee80211_sta *sta) 1568 { 1569 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1570 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1571 struct iwl_mvm_rxq_dup_data *dup_data; 1572 int i, ret, sta_id; 1573 bool sta_update = false; 1574 unsigned int sta_flags = 0; 1575 1576 lockdep_assert_held(&mvm->mutex); 1577 1578 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1579 sta_id = iwl_mvm_find_free_sta_id(mvm, 1580 ieee80211_vif_type_p2p(vif)); 1581 else 1582 sta_id = mvm_sta->sta_id; 1583 1584 if (sta_id == IWL_MVM_INVALID_STA) 1585 return -ENOSPC; 1586 1587 spin_lock_init(&mvm_sta->lock); 1588 1589 /* if this is a HW restart re-alloc existing queues */ 1590 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1591 struct iwl_mvm_int_sta tmp_sta = { 1592 .sta_id = sta_id, 1593 .type = mvm_sta->sta_type, 1594 }; 1595 1596 /* 1597 * First add an empty station since allocating 1598 * a queue requires a valid station 1599 */ 1600 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1601 mvmvif->id, mvmvif->color); 1602 if (ret) 1603 goto err; 1604 1605 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1606 sta_update = true; 1607 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1608 goto update_fw; 1609 } 1610 1611 mvm_sta->sta_id = sta_id; 1612 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1613 mvmvif->color); 1614 mvm_sta->vif = vif; 1615 if (!mvm->trans->cfg->gen2) 1616 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1617 else 1618 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1619 mvm_sta->tx_protection = 0; 1620 mvm_sta->tt_tx_protection = false; 1621 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1622 1623 /* HW restart, don't assume the memory has been zeroed */ 1624 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1625 mvm_sta->tfd_queue_msk = 0; 1626 1627 /* for HW restart - reset everything but the sequence number */ 1628 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1629 u16 seq = mvm_sta->tid_data[i].seq_number; 1630 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1631 mvm_sta->tid_data[i].seq_number = seq; 1632 1633 /* 1634 * Mark all queues for this STA as unallocated and defer TX 1635 * frames until the queue is allocated 1636 */ 1637 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1638 } 1639 1640 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1641 struct iwl_mvm_txq *mvmtxq = 1642 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1643 1644 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1645 INIT_LIST_HEAD(&mvmtxq->list); 1646 atomic_set(&mvmtxq->tx_request, 0); 1647 } 1648 1649 mvm_sta->agg_tids = 0; 1650 1651 if (iwl_mvm_has_new_rx_api(mvm) && 1652 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1653 int q; 1654 1655 dup_data = kcalloc(mvm->trans->num_rx_queues, 1656 sizeof(*dup_data), GFP_KERNEL); 1657 if (!dup_data) 1658 return -ENOMEM; 1659 /* 1660 * Initialize all the last_seq values to 0xffff which can never 1661 * compare equal to the frame's seq_ctrl in the check in 1662 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1663 * number and fragmented packets don't reach that function. 1664 * 1665 * This thus allows receiving a packet with seqno 0 and the 1666 * retry bit set as the very first packet on a new TID. 1667 */ 1668 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1669 memset(dup_data[q].last_seq, 0xff, 1670 sizeof(dup_data[q].last_seq)); 1671 mvm_sta->dup_data = dup_data; 1672 } 1673 1674 if (!iwl_mvm_has_new_tx_api(mvm)) { 1675 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1676 ieee80211_vif_type_p2p(vif)); 1677 if (ret) 1678 goto err; 1679 } 1680 1681 /* 1682 * if rs is registered with mac80211, then "add station" will be handled 1683 * via the corresponding ops, otherwise need to notify rate scaling here 1684 */ 1685 if (iwl_mvm_has_tlc_offload(mvm)) 1686 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1687 1688 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1689 1690 update_fw: 1691 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1692 if (ret) 1693 goto err; 1694 1695 if (vif->type == NL80211_IFTYPE_STATION) { 1696 if (!sta->tdls) { 1697 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1698 mvmvif->ap_sta_id = sta_id; 1699 } else { 1700 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1701 } 1702 } 1703 1704 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1705 1706 return 0; 1707 1708 err: 1709 return ret; 1710 } 1711 1712 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1713 bool drain) 1714 { 1715 struct iwl_mvm_add_sta_cmd cmd = {}; 1716 int ret; 1717 u32 status; 1718 1719 lockdep_assert_held(&mvm->mutex); 1720 1721 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1722 cmd.sta_id = mvmsta->sta_id; 1723 cmd.add_modify = STA_MODE_MODIFY; 1724 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1725 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1726 1727 status = ADD_STA_SUCCESS; 1728 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1729 iwl_mvm_add_sta_cmd_size(mvm), 1730 &cmd, &status); 1731 if (ret) 1732 return ret; 1733 1734 switch (status & IWL_ADD_STA_STATUS_MASK) { 1735 case ADD_STA_SUCCESS: 1736 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1737 mvmsta->sta_id); 1738 break; 1739 default: 1740 ret = -EIO; 1741 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1742 mvmsta->sta_id); 1743 break; 1744 } 1745 1746 return ret; 1747 } 1748 1749 /* 1750 * Remove a station from the FW table. Before sending the command to remove 1751 * the station validate that the station is indeed known to the driver (sanity 1752 * only). 1753 */ 1754 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1755 { 1756 struct ieee80211_sta *sta; 1757 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1758 .sta_id = sta_id, 1759 }; 1760 int ret; 1761 1762 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1763 lockdep_is_held(&mvm->mutex)); 1764 1765 /* Note: internal stations are marked as error values */ 1766 if (!sta) { 1767 IWL_ERR(mvm, "Invalid station id\n"); 1768 return -EINVAL; 1769 } 1770 1771 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1772 sizeof(rm_sta_cmd), &rm_sta_cmd); 1773 if (ret) { 1774 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1775 return ret; 1776 } 1777 1778 return 0; 1779 } 1780 1781 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1782 struct ieee80211_vif *vif, 1783 struct ieee80211_sta *sta) 1784 { 1785 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1786 int i; 1787 1788 lockdep_assert_held(&mvm->mutex); 1789 1790 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1791 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1792 continue; 1793 1794 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1795 0); 1796 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1797 } 1798 1799 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1800 struct iwl_mvm_txq *mvmtxq = 1801 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1802 1803 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1804 } 1805 } 1806 1807 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1808 struct iwl_mvm_sta *mvm_sta) 1809 { 1810 int i; 1811 1812 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1813 u16 txq_id; 1814 int ret; 1815 1816 spin_lock_bh(&mvm_sta->lock); 1817 txq_id = mvm_sta->tid_data[i].txq_id; 1818 spin_unlock_bh(&mvm_sta->lock); 1819 1820 if (txq_id == IWL_MVM_INVALID_QUEUE) 1821 continue; 1822 1823 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1824 if (ret) 1825 return ret; 1826 } 1827 1828 return 0; 1829 } 1830 1831 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1832 struct ieee80211_vif *vif, 1833 struct ieee80211_sta *sta) 1834 { 1835 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1836 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1837 u8 sta_id = mvm_sta->sta_id; 1838 int ret; 1839 1840 lockdep_assert_held(&mvm->mutex); 1841 1842 if (iwl_mvm_has_new_rx_api(mvm)) 1843 kfree(mvm_sta->dup_data); 1844 1845 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1846 if (ret) 1847 return ret; 1848 1849 /* flush its queues here since we are freeing mvm_sta */ 1850 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1851 if (ret) 1852 return ret; 1853 if (iwl_mvm_has_new_tx_api(mvm)) { 1854 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1855 } else { 1856 u32 q_mask = mvm_sta->tfd_queue_msk; 1857 1858 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1859 q_mask); 1860 } 1861 if (ret) 1862 return ret; 1863 1864 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1865 1866 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1867 1868 /* If there is a TXQ still marked as reserved - free it */ 1869 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1870 u8 reserved_txq = mvm_sta->reserved_queue; 1871 enum iwl_mvm_queue_status *status; 1872 1873 /* 1874 * If no traffic has gone through the reserved TXQ - it 1875 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1876 * should be manually marked as free again 1877 */ 1878 status = &mvm->queue_info[reserved_txq].status; 1879 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1880 (*status != IWL_MVM_QUEUE_FREE), 1881 "sta_id %d reserved txq %d status %d", 1882 sta_id, reserved_txq, *status)) 1883 return -EINVAL; 1884 1885 *status = IWL_MVM_QUEUE_FREE; 1886 } 1887 1888 if (vif->type == NL80211_IFTYPE_STATION && 1889 mvmvif->ap_sta_id == sta_id) { 1890 /* if associated - we can't remove the AP STA now */ 1891 if (vif->bss_conf.assoc) 1892 return ret; 1893 1894 /* unassoc - go ahead - remove the AP STA now */ 1895 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1896 1897 /* clear d0i3_ap_sta_id if no longer relevant */ 1898 if (mvm->d0i3_ap_sta_id == sta_id) 1899 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1900 } 1901 1902 /* 1903 * This shouldn't happen - the TDLS channel switch should be canceled 1904 * before the STA is removed. 1905 */ 1906 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1907 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1908 cancel_delayed_work(&mvm->tdls_cs.dwork); 1909 } 1910 1911 /* 1912 * Make sure that the tx response code sees the station as -EBUSY and 1913 * calls the drain worker. 1914 */ 1915 spin_lock_bh(&mvm_sta->lock); 1916 spin_unlock_bh(&mvm_sta->lock); 1917 1918 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1919 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1920 1921 return ret; 1922 } 1923 1924 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1925 struct ieee80211_vif *vif, 1926 u8 sta_id) 1927 { 1928 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1929 1930 lockdep_assert_held(&mvm->mutex); 1931 1932 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1933 return ret; 1934 } 1935 1936 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1937 struct iwl_mvm_int_sta *sta, 1938 u32 qmask, enum nl80211_iftype iftype, 1939 enum iwl_sta_type type) 1940 { 1941 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1942 sta->sta_id == IWL_MVM_INVALID_STA) { 1943 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1944 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1945 return -ENOSPC; 1946 } 1947 1948 sta->tfd_queue_msk = qmask; 1949 sta->type = type; 1950 1951 /* put a non-NULL value so iterating over the stations won't stop */ 1952 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1953 return 0; 1954 } 1955 1956 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1957 { 1958 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1959 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1960 sta->sta_id = IWL_MVM_INVALID_STA; 1961 } 1962 1963 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1964 u8 sta_id, u8 fifo) 1965 { 1966 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1967 mvm->cfg->base_params->wd_timeout : 1968 IWL_WATCHDOG_DISABLED; 1969 1970 if (iwl_mvm_has_new_tx_api(mvm)) { 1971 int tvqm_queue = 1972 iwl_mvm_tvqm_enable_txq(mvm, sta_id, 1973 IWL_MAX_TID_COUNT, 1974 wdg_timeout); 1975 *queue = tvqm_queue; 1976 } else { 1977 struct iwl_trans_txq_scd_cfg cfg = { 1978 .fifo = fifo, 1979 .sta_id = sta_id, 1980 .tid = IWL_MAX_TID_COUNT, 1981 .aggregate = false, 1982 .frame_limit = IWL_FRAME_LIMIT, 1983 }; 1984 1985 iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout); 1986 } 1987 } 1988 1989 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1990 { 1991 int ret; 1992 1993 lockdep_assert_held(&mvm->mutex); 1994 1995 /* Allocate aux station and assign to it the aux queue */ 1996 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1997 NL80211_IFTYPE_UNSPECIFIED, 1998 IWL_STA_AUX_ACTIVITY); 1999 if (ret) 2000 return ret; 2001 2002 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 2003 if (!iwl_mvm_has_new_tx_api(mvm)) 2004 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2005 mvm->aux_sta.sta_id, 2006 IWL_MVM_TX_FIFO_MCAST); 2007 2008 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 2009 MAC_INDEX_AUX, 0); 2010 if (ret) { 2011 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2012 return ret; 2013 } 2014 2015 /* 2016 * For 22000 firmware and on we cannot add queue to a station unknown 2017 * to firmware so enable queue here - after the station was added 2018 */ 2019 if (iwl_mvm_has_new_tx_api(mvm)) 2020 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2021 mvm->aux_sta.sta_id, 2022 IWL_MVM_TX_FIFO_MCAST); 2023 2024 return 0; 2025 } 2026 2027 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2028 { 2029 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2030 int ret; 2031 2032 lockdep_assert_held(&mvm->mutex); 2033 2034 /* Map snif queue to fifo - must happen before adding snif station */ 2035 if (!iwl_mvm_has_new_tx_api(mvm)) 2036 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2037 mvm->snif_sta.sta_id, 2038 IWL_MVM_TX_FIFO_BE); 2039 2040 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 2041 mvmvif->id, 0); 2042 if (ret) 2043 return ret; 2044 2045 /* 2046 * For 22000 firmware and on we cannot add queue to a station unknown 2047 * to firmware so enable queue here - after the station was added 2048 */ 2049 if (iwl_mvm_has_new_tx_api(mvm)) 2050 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2051 mvm->snif_sta.sta_id, 2052 IWL_MVM_TX_FIFO_BE); 2053 2054 return 0; 2055 } 2056 2057 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2058 { 2059 int ret; 2060 2061 lockdep_assert_held(&mvm->mutex); 2062 2063 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2064 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2065 if (ret) 2066 IWL_WARN(mvm, "Failed sending remove station\n"); 2067 2068 return ret; 2069 } 2070 2071 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2072 { 2073 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2074 } 2075 2076 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 2077 { 2078 lockdep_assert_held(&mvm->mutex); 2079 2080 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2081 } 2082 2083 /* 2084 * Send the add station command for the vif's broadcast station. 2085 * Assumes that the station was already allocated. 2086 * 2087 * @mvm: the mvm component 2088 * @vif: the interface to which the broadcast station is added 2089 * @bsta: the broadcast station to add. 2090 */ 2091 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2092 { 2093 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2094 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2095 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2096 const u8 *baddr = _baddr; 2097 int queue; 2098 int ret; 2099 unsigned int wdg_timeout = 2100 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2101 struct iwl_trans_txq_scd_cfg cfg = { 2102 .fifo = IWL_MVM_TX_FIFO_VO, 2103 .sta_id = mvmvif->bcast_sta.sta_id, 2104 .tid = IWL_MAX_TID_COUNT, 2105 .aggregate = false, 2106 .frame_limit = IWL_FRAME_LIMIT, 2107 }; 2108 2109 lockdep_assert_held(&mvm->mutex); 2110 2111 if (!iwl_mvm_has_new_tx_api(mvm)) { 2112 if (vif->type == NL80211_IFTYPE_AP || 2113 vif->type == NL80211_IFTYPE_ADHOC) { 2114 queue = mvm->probe_queue; 2115 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2116 queue = mvm->p2p_dev_queue; 2117 } else { 2118 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2119 return -EINVAL; 2120 } 2121 2122 bsta->tfd_queue_msk |= BIT(queue); 2123 2124 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2125 } 2126 2127 if (vif->type == NL80211_IFTYPE_ADHOC) 2128 baddr = vif->bss_conf.bssid; 2129 2130 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2131 return -ENOSPC; 2132 2133 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2134 mvmvif->id, mvmvif->color); 2135 if (ret) 2136 return ret; 2137 2138 /* 2139 * For 22000 firmware and on we cannot add queue to a station unknown 2140 * to firmware so enable queue here - after the station was added 2141 */ 2142 if (iwl_mvm_has_new_tx_api(mvm)) { 2143 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2144 IWL_MAX_TID_COUNT, 2145 wdg_timeout); 2146 2147 if (vif->type == NL80211_IFTYPE_AP || 2148 vif->type == NL80211_IFTYPE_ADHOC) 2149 mvm->probe_queue = queue; 2150 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2151 mvm->p2p_dev_queue = queue; 2152 } 2153 2154 return 0; 2155 } 2156 2157 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2158 struct ieee80211_vif *vif) 2159 { 2160 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2161 int queue; 2162 2163 lockdep_assert_held(&mvm->mutex); 2164 2165 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2166 2167 switch (vif->type) { 2168 case NL80211_IFTYPE_AP: 2169 case NL80211_IFTYPE_ADHOC: 2170 queue = mvm->probe_queue; 2171 break; 2172 case NL80211_IFTYPE_P2P_DEVICE: 2173 queue = mvm->p2p_dev_queue; 2174 break; 2175 default: 2176 WARN(1, "Can't free bcast queue on vif type %d\n", 2177 vif->type); 2178 return; 2179 } 2180 2181 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2182 if (iwl_mvm_has_new_tx_api(mvm)) 2183 return; 2184 2185 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2186 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2187 } 2188 2189 /* Send the FW a request to remove the station from it's internal data 2190 * structures, but DO NOT remove the entry from the local data structures. */ 2191 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2192 { 2193 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2194 int ret; 2195 2196 lockdep_assert_held(&mvm->mutex); 2197 2198 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2199 2200 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2201 if (ret) 2202 IWL_WARN(mvm, "Failed sending remove station\n"); 2203 return ret; 2204 } 2205 2206 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2207 { 2208 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2209 2210 lockdep_assert_held(&mvm->mutex); 2211 2212 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2213 ieee80211_vif_type_p2p(vif), 2214 IWL_STA_GENERAL_PURPOSE); 2215 } 2216 2217 /* Allocate a new station entry for the broadcast station to the given vif, 2218 * and send it to the FW. 2219 * Note that each P2P mac should have its own broadcast station. 2220 * 2221 * @mvm: the mvm component 2222 * @vif: the interface to which the broadcast station is added 2223 * @bsta: the broadcast station to add. */ 2224 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2225 { 2226 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2227 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2228 int ret; 2229 2230 lockdep_assert_held(&mvm->mutex); 2231 2232 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2233 if (ret) 2234 return ret; 2235 2236 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2237 2238 if (ret) 2239 iwl_mvm_dealloc_int_sta(mvm, bsta); 2240 2241 return ret; 2242 } 2243 2244 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2245 { 2246 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2247 2248 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2249 } 2250 2251 /* 2252 * Send the FW a request to remove the station from it's internal data 2253 * structures, and in addition remove it from the local data structure. 2254 */ 2255 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2256 { 2257 int ret; 2258 2259 lockdep_assert_held(&mvm->mutex); 2260 2261 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2262 2263 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2264 2265 return ret; 2266 } 2267 2268 /* 2269 * Allocate a new station entry for the multicast station to the given vif, 2270 * and send it to the FW. 2271 * Note that each AP/GO mac should have its own multicast station. 2272 * 2273 * @mvm: the mvm component 2274 * @vif: the interface to which the multicast station is added 2275 */ 2276 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2277 { 2278 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2279 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2280 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2281 const u8 *maddr = _maddr; 2282 struct iwl_trans_txq_scd_cfg cfg = { 2283 .fifo = vif->type == NL80211_IFTYPE_AP ? 2284 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2285 .sta_id = msta->sta_id, 2286 .tid = 0, 2287 .aggregate = false, 2288 .frame_limit = IWL_FRAME_LIMIT, 2289 }; 2290 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2291 int ret; 2292 2293 lockdep_assert_held(&mvm->mutex); 2294 2295 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2296 vif->type != NL80211_IFTYPE_ADHOC)) 2297 return -ENOTSUPP; 2298 2299 /* 2300 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2301 * invalid, so make sure we use the queue we want. 2302 * Note that this is done here as we want to avoid making DQA 2303 * changes in mac80211 layer. 2304 */ 2305 if (vif->type == NL80211_IFTYPE_ADHOC) 2306 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2307 2308 /* 2309 * While in previous FWs we had to exclude cab queue from TFD queue 2310 * mask, now it is needed as any other queue. 2311 */ 2312 if (!iwl_mvm_has_new_tx_api(mvm) && 2313 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2314 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2315 timeout); 2316 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2317 } 2318 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2319 mvmvif->id, mvmvif->color); 2320 if (ret) { 2321 iwl_mvm_dealloc_int_sta(mvm, msta); 2322 return ret; 2323 } 2324 2325 /* 2326 * Enable cab queue after the ADD_STA command is sent. 2327 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2328 * command with unknown station id, and for FW that doesn't support 2329 * station API since the cab queue is not included in the 2330 * tfd_queue_mask. 2331 */ 2332 if (iwl_mvm_has_new_tx_api(mvm)) { 2333 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2334 0, 2335 timeout); 2336 mvmvif->cab_queue = queue; 2337 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2338 IWL_UCODE_TLV_API_STA_TYPE)) 2339 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2340 timeout); 2341 2342 return 0; 2343 } 2344 2345 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2346 struct ieee80211_key_conf *keyconf, 2347 bool mcast) 2348 { 2349 union { 2350 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2351 struct iwl_mvm_add_sta_key_cmd cmd; 2352 } u = {}; 2353 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2354 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2355 __le16 key_flags; 2356 int ret, size; 2357 u32 status; 2358 2359 /* This is a valid situation for GTK removal */ 2360 if (sta_id == IWL_MVM_INVALID_STA) 2361 return 0; 2362 2363 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2364 STA_KEY_FLG_KEYID_MSK); 2365 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2366 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2367 2368 if (mcast) 2369 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2370 2371 /* 2372 * The fields assigned here are in the same location at the start 2373 * of the command, so we can do this union trick. 2374 */ 2375 u.cmd.common.key_flags = key_flags; 2376 u.cmd.common.key_offset = keyconf->hw_key_idx; 2377 u.cmd.common.sta_id = sta_id; 2378 2379 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2380 2381 status = ADD_STA_SUCCESS; 2382 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2383 &status); 2384 2385 switch (status) { 2386 case ADD_STA_SUCCESS: 2387 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2388 break; 2389 default: 2390 ret = -EIO; 2391 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2392 break; 2393 } 2394 2395 return ret; 2396 } 2397 2398 /* 2399 * Send the FW a request to remove the station from it's internal data 2400 * structures, and in addition remove it from the local data structure. 2401 */ 2402 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2403 { 2404 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2405 int ret; 2406 2407 lockdep_assert_held(&mvm->mutex); 2408 2409 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2410 2411 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2412 2413 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2414 if (ret) 2415 IWL_WARN(mvm, "Failed sending remove station\n"); 2416 2417 return ret; 2418 } 2419 2420 #define IWL_MAX_RX_BA_SESSIONS 16 2421 2422 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2423 { 2424 struct iwl_mvm_delba_notif notif = { 2425 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2426 .metadata.sync = 1, 2427 .delba.baid = baid, 2428 }; 2429 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2430 }; 2431 2432 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2433 struct iwl_mvm_baid_data *data) 2434 { 2435 int i; 2436 2437 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2438 2439 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2440 int j; 2441 struct iwl_mvm_reorder_buffer *reorder_buf = 2442 &data->reorder_buf[i]; 2443 struct iwl_mvm_reorder_buf_entry *entries = 2444 &data->entries[i * data->entries_per_queue]; 2445 2446 spin_lock_bh(&reorder_buf->lock); 2447 if (likely(!reorder_buf->num_stored)) { 2448 spin_unlock_bh(&reorder_buf->lock); 2449 continue; 2450 } 2451 2452 /* 2453 * This shouldn't happen in regular DELBA since the internal 2454 * delBA notification should trigger a release of all frames in 2455 * the reorder buffer. 2456 */ 2457 WARN_ON(1); 2458 2459 for (j = 0; j < reorder_buf->buf_size; j++) 2460 __skb_queue_purge(&entries[j].e.frames); 2461 /* 2462 * Prevent timer re-arm. This prevents a very far fetched case 2463 * where we timed out on the notification. There may be prior 2464 * RX frames pending in the RX queue before the notification 2465 * that might get processed between now and the actual deletion 2466 * and we would re-arm the timer although we are deleting the 2467 * reorder buffer. 2468 */ 2469 reorder_buf->removed = true; 2470 spin_unlock_bh(&reorder_buf->lock); 2471 del_timer_sync(&reorder_buf->reorder_timer); 2472 } 2473 } 2474 2475 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2476 struct iwl_mvm_baid_data *data, 2477 u16 ssn, u16 buf_size) 2478 { 2479 int i; 2480 2481 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2482 struct iwl_mvm_reorder_buffer *reorder_buf = 2483 &data->reorder_buf[i]; 2484 struct iwl_mvm_reorder_buf_entry *entries = 2485 &data->entries[i * data->entries_per_queue]; 2486 int j; 2487 2488 reorder_buf->num_stored = 0; 2489 reorder_buf->head_sn = ssn; 2490 reorder_buf->buf_size = buf_size; 2491 /* rx reorder timer */ 2492 timer_setup(&reorder_buf->reorder_timer, 2493 iwl_mvm_reorder_timer_expired, 0); 2494 spin_lock_init(&reorder_buf->lock); 2495 reorder_buf->mvm = mvm; 2496 reorder_buf->queue = i; 2497 reorder_buf->valid = false; 2498 for (j = 0; j < reorder_buf->buf_size; j++) 2499 __skb_queue_head_init(&entries[j].e.frames); 2500 } 2501 } 2502 2503 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2504 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2505 { 2506 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2507 struct iwl_mvm_add_sta_cmd cmd = {}; 2508 struct iwl_mvm_baid_data *baid_data = NULL; 2509 int ret; 2510 u32 status; 2511 2512 lockdep_assert_held(&mvm->mutex); 2513 2514 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2515 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2516 return -ENOSPC; 2517 } 2518 2519 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2520 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2521 2522 /* sparse doesn't like the __align() so don't check */ 2523 #ifndef __CHECKER__ 2524 /* 2525 * The division below will be OK if either the cache line size 2526 * can be divided by the entry size (ALIGN will round up) or if 2527 * if the entry size can be divided by the cache line size, in 2528 * which case the ALIGN() will do nothing. 2529 */ 2530 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2531 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2532 #endif 2533 2534 /* 2535 * Upward align the reorder buffer size to fill an entire cache 2536 * line for each queue, to avoid sharing cache lines between 2537 * different queues. 2538 */ 2539 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2540 2541 /* 2542 * Allocate here so if allocation fails we can bail out early 2543 * before starting the BA session in the firmware 2544 */ 2545 baid_data = kzalloc(sizeof(*baid_data) + 2546 mvm->trans->num_rx_queues * 2547 reorder_buf_size, 2548 GFP_KERNEL); 2549 if (!baid_data) 2550 return -ENOMEM; 2551 2552 /* 2553 * This division is why we need the above BUILD_BUG_ON(), 2554 * if that doesn't hold then this will not be right. 2555 */ 2556 baid_data->entries_per_queue = 2557 reorder_buf_size / sizeof(baid_data->entries[0]); 2558 } 2559 2560 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2561 cmd.sta_id = mvm_sta->sta_id; 2562 cmd.add_modify = STA_MODE_MODIFY; 2563 if (start) { 2564 cmd.add_immediate_ba_tid = (u8) tid; 2565 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2566 cmd.rx_ba_window = cpu_to_le16(buf_size); 2567 } else { 2568 cmd.remove_immediate_ba_tid = (u8) tid; 2569 } 2570 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2571 STA_MODIFY_REMOVE_BA_TID; 2572 2573 status = ADD_STA_SUCCESS; 2574 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2575 iwl_mvm_add_sta_cmd_size(mvm), 2576 &cmd, &status); 2577 if (ret) 2578 goto out_free; 2579 2580 switch (status & IWL_ADD_STA_STATUS_MASK) { 2581 case ADD_STA_SUCCESS: 2582 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2583 start ? "start" : "stopp"); 2584 break; 2585 case ADD_STA_IMMEDIATE_BA_FAILURE: 2586 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2587 ret = -ENOSPC; 2588 break; 2589 default: 2590 ret = -EIO; 2591 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2592 start ? "start" : "stopp", status); 2593 break; 2594 } 2595 2596 if (ret) 2597 goto out_free; 2598 2599 if (start) { 2600 u8 baid; 2601 2602 mvm->rx_ba_sessions++; 2603 2604 if (!iwl_mvm_has_new_rx_api(mvm)) 2605 return 0; 2606 2607 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2608 ret = -EINVAL; 2609 goto out_free; 2610 } 2611 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2612 IWL_ADD_STA_BAID_SHIFT); 2613 baid_data->baid = baid; 2614 baid_data->timeout = timeout; 2615 baid_data->last_rx = jiffies; 2616 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2617 timer_setup(&baid_data->session_timer, 2618 iwl_mvm_rx_agg_session_expired, 0); 2619 baid_data->mvm = mvm; 2620 baid_data->tid = tid; 2621 baid_data->sta_id = mvm_sta->sta_id; 2622 2623 mvm_sta->tid_to_baid[tid] = baid; 2624 if (timeout) 2625 mod_timer(&baid_data->session_timer, 2626 TU_TO_EXP_TIME(timeout * 2)); 2627 2628 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2629 /* 2630 * protect the BA data with RCU to cover a case where our 2631 * internal RX sync mechanism will timeout (not that it's 2632 * supposed to happen) and we will free the session data while 2633 * RX is being processed in parallel 2634 */ 2635 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2636 mvm_sta->sta_id, tid, baid); 2637 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2638 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2639 } else { 2640 u8 baid = mvm_sta->tid_to_baid[tid]; 2641 2642 if (mvm->rx_ba_sessions > 0) 2643 /* check that restart flow didn't zero the counter */ 2644 mvm->rx_ba_sessions--; 2645 if (!iwl_mvm_has_new_rx_api(mvm)) 2646 return 0; 2647 2648 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2649 return -EINVAL; 2650 2651 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2652 if (WARN_ON(!baid_data)) 2653 return -EINVAL; 2654 2655 /* synchronize all rx queues so we can safely delete */ 2656 iwl_mvm_free_reorder(mvm, baid_data); 2657 del_timer_sync(&baid_data->session_timer); 2658 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2659 kfree_rcu(baid_data, rcu_head); 2660 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2661 } 2662 return 0; 2663 2664 out_free: 2665 kfree(baid_data); 2666 return ret; 2667 } 2668 2669 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2670 int tid, u8 queue, bool start) 2671 { 2672 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2673 struct iwl_mvm_add_sta_cmd cmd = {}; 2674 int ret; 2675 u32 status; 2676 2677 lockdep_assert_held(&mvm->mutex); 2678 2679 if (start) { 2680 mvm_sta->tfd_queue_msk |= BIT(queue); 2681 mvm_sta->tid_disable_agg &= ~BIT(tid); 2682 } else { 2683 /* In DQA-mode the queue isn't removed on agg termination */ 2684 mvm_sta->tid_disable_agg |= BIT(tid); 2685 } 2686 2687 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2688 cmd.sta_id = mvm_sta->sta_id; 2689 cmd.add_modify = STA_MODE_MODIFY; 2690 if (!iwl_mvm_has_new_tx_api(mvm)) 2691 cmd.modify_mask = STA_MODIFY_QUEUES; 2692 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2693 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2694 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2695 2696 status = ADD_STA_SUCCESS; 2697 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2698 iwl_mvm_add_sta_cmd_size(mvm), 2699 &cmd, &status); 2700 if (ret) 2701 return ret; 2702 2703 switch (status & IWL_ADD_STA_STATUS_MASK) { 2704 case ADD_STA_SUCCESS: 2705 break; 2706 default: 2707 ret = -EIO; 2708 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2709 start ? "start" : "stopp", status); 2710 break; 2711 } 2712 2713 return ret; 2714 } 2715 2716 const u8 tid_to_mac80211_ac[] = { 2717 IEEE80211_AC_BE, 2718 IEEE80211_AC_BK, 2719 IEEE80211_AC_BK, 2720 IEEE80211_AC_BE, 2721 IEEE80211_AC_VI, 2722 IEEE80211_AC_VI, 2723 IEEE80211_AC_VO, 2724 IEEE80211_AC_VO, 2725 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2726 }; 2727 2728 static const u8 tid_to_ucode_ac[] = { 2729 AC_BE, 2730 AC_BK, 2731 AC_BK, 2732 AC_BE, 2733 AC_VI, 2734 AC_VI, 2735 AC_VO, 2736 AC_VO, 2737 }; 2738 2739 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2740 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2741 { 2742 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2743 struct iwl_mvm_tid_data *tid_data; 2744 u16 normalized_ssn; 2745 u16 txq_id; 2746 int ret; 2747 2748 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2749 return -EINVAL; 2750 2751 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2752 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2753 IWL_ERR(mvm, 2754 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2755 mvmsta->tid_data[tid].state); 2756 return -ENXIO; 2757 } 2758 2759 lockdep_assert_held(&mvm->mutex); 2760 2761 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2762 iwl_mvm_has_new_tx_api(mvm)) { 2763 u8 ac = tid_to_mac80211_ac[tid]; 2764 2765 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2766 if (ret) 2767 return ret; 2768 } 2769 2770 spin_lock_bh(&mvmsta->lock); 2771 2772 /* possible race condition - we entered D0i3 while starting agg */ 2773 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2774 spin_unlock_bh(&mvmsta->lock); 2775 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2776 return -EIO; 2777 } 2778 2779 /* 2780 * Note the possible cases: 2781 * 1. An enabled TXQ - TXQ needs to become agg'ed 2782 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2783 * it as reserved 2784 */ 2785 txq_id = mvmsta->tid_data[tid].txq_id; 2786 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2787 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2788 IWL_MVM_DQA_MIN_DATA_QUEUE, 2789 IWL_MVM_DQA_MAX_DATA_QUEUE); 2790 if (ret < 0) { 2791 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2792 goto out; 2793 } 2794 2795 txq_id = ret; 2796 2797 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2798 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2799 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2800 ret = -ENXIO; 2801 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2802 tid, IWL_MAX_HW_QUEUES - 1); 2803 goto out; 2804 2805 } else if (unlikely(mvm->queue_info[txq_id].status == 2806 IWL_MVM_QUEUE_SHARED)) { 2807 ret = -ENXIO; 2808 IWL_DEBUG_TX_QUEUES(mvm, 2809 "Can't start tid %d agg on shared queue!\n", 2810 tid); 2811 goto out; 2812 } 2813 2814 IWL_DEBUG_TX_QUEUES(mvm, 2815 "AGG for tid %d will be on queue #%d\n", 2816 tid, txq_id); 2817 2818 tid_data = &mvmsta->tid_data[tid]; 2819 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2820 tid_data->txq_id = txq_id; 2821 *ssn = tid_data->ssn; 2822 2823 IWL_DEBUG_TX_QUEUES(mvm, 2824 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2825 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2826 tid_data->next_reclaimed); 2827 2828 /* 2829 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2830 * to align the wrap around of ssn so we compare relevant values. 2831 */ 2832 normalized_ssn = tid_data->ssn; 2833 if (mvm->trans->cfg->gen2) 2834 normalized_ssn &= 0xff; 2835 2836 if (normalized_ssn == tid_data->next_reclaimed) { 2837 tid_data->state = IWL_AGG_STARTING; 2838 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2839 } else { 2840 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2841 } 2842 2843 ret = 0; 2844 2845 out: 2846 spin_unlock_bh(&mvmsta->lock); 2847 2848 return ret; 2849 } 2850 2851 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2852 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2853 bool amsdu) 2854 { 2855 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2856 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2857 unsigned int wdg_timeout = 2858 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2859 int queue, ret; 2860 bool alloc_queue = true; 2861 enum iwl_mvm_queue_status queue_status; 2862 u16 ssn; 2863 2864 struct iwl_trans_txq_scd_cfg cfg = { 2865 .sta_id = mvmsta->sta_id, 2866 .tid = tid, 2867 .frame_limit = buf_size, 2868 .aggregate = true, 2869 }; 2870 2871 /* 2872 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2873 * manager, so this function should never be called in this case. 2874 */ 2875 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2876 return -EINVAL; 2877 2878 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2879 != IWL_MAX_TID_COUNT); 2880 2881 spin_lock_bh(&mvmsta->lock); 2882 ssn = tid_data->ssn; 2883 queue = tid_data->txq_id; 2884 tid_data->state = IWL_AGG_ON; 2885 mvmsta->agg_tids |= BIT(tid); 2886 tid_data->ssn = 0xffff; 2887 tid_data->amsdu_in_ampdu_allowed = amsdu; 2888 spin_unlock_bh(&mvmsta->lock); 2889 2890 if (iwl_mvm_has_new_tx_api(mvm)) { 2891 /* 2892 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2893 * would have failed, so if we are here there is no need to 2894 * allocate a queue. 2895 * However, if aggregation size is different than the default 2896 * size, the scheduler should be reconfigured. 2897 * We cannot do this with the new TX API, so return unsupported 2898 * for now, until it will be offloaded to firmware.. 2899 * Note that if SCD default value changes - this condition 2900 * should be updated as well. 2901 */ 2902 if (buf_size < IWL_FRAME_LIMIT) 2903 return -ENOTSUPP; 2904 2905 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2906 if (ret) 2907 return -EIO; 2908 goto out; 2909 } 2910 2911 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2912 2913 queue_status = mvm->queue_info[queue].status; 2914 2915 /* Maybe there is no need to even alloc a queue... */ 2916 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2917 alloc_queue = false; 2918 2919 /* 2920 * Only reconfig the SCD for the queue if the window size has 2921 * changed from current (become smaller) 2922 */ 2923 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2924 /* 2925 * If reconfiguring an existing queue, it first must be 2926 * drained 2927 */ 2928 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2929 BIT(queue)); 2930 if (ret) { 2931 IWL_ERR(mvm, 2932 "Error draining queue before reconfig\n"); 2933 return ret; 2934 } 2935 2936 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2937 mvmsta->sta_id, tid, 2938 buf_size, ssn); 2939 if (ret) { 2940 IWL_ERR(mvm, 2941 "Error reconfiguring TXQ #%d\n", queue); 2942 return ret; 2943 } 2944 } 2945 2946 if (alloc_queue) 2947 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2948 &cfg, wdg_timeout); 2949 2950 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2951 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2952 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2953 if (ret) 2954 return -EIO; 2955 } 2956 2957 /* No need to mark as reserved */ 2958 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2959 2960 out: 2961 /* 2962 * Even though in theory the peer could have different 2963 * aggregation reorder buffer sizes for different sessions, 2964 * our ucode doesn't allow for that and has a global limit 2965 * for each station. Therefore, use the minimum of all the 2966 * aggregation sessions and our default value. 2967 */ 2968 mvmsta->max_agg_bufsize = 2969 min(mvmsta->max_agg_bufsize, buf_size); 2970 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2971 2972 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2973 sta->addr, tid); 2974 2975 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false); 2976 } 2977 2978 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2979 struct iwl_mvm_sta *mvmsta, 2980 struct iwl_mvm_tid_data *tid_data) 2981 { 2982 u16 txq_id = tid_data->txq_id; 2983 2984 lockdep_assert_held(&mvm->mutex); 2985 2986 if (iwl_mvm_has_new_tx_api(mvm)) 2987 return; 2988 2989 /* 2990 * The TXQ is marked as reserved only if no traffic came through yet 2991 * This means no traffic has been sent on this TID (agg'd or not), so 2992 * we no longer have use for the queue. Since it hasn't even been 2993 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2994 * free. 2995 */ 2996 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 2997 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2998 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 2999 } 3000 } 3001 3002 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3003 struct ieee80211_sta *sta, u16 tid) 3004 { 3005 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3006 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3007 u16 txq_id; 3008 int err; 3009 3010 /* 3011 * If mac80211 is cleaning its state, then say that we finished since 3012 * our state has been cleared anyway. 3013 */ 3014 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3015 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3016 return 0; 3017 } 3018 3019 spin_lock_bh(&mvmsta->lock); 3020 3021 txq_id = tid_data->txq_id; 3022 3023 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3024 mvmsta->sta_id, tid, txq_id, tid_data->state); 3025 3026 mvmsta->agg_tids &= ~BIT(tid); 3027 3028 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3029 3030 switch (tid_data->state) { 3031 case IWL_AGG_ON: 3032 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3033 3034 IWL_DEBUG_TX_QUEUES(mvm, 3035 "ssn = %d, next_recl = %d\n", 3036 tid_data->ssn, tid_data->next_reclaimed); 3037 3038 tid_data->ssn = 0xffff; 3039 tid_data->state = IWL_AGG_OFF; 3040 spin_unlock_bh(&mvmsta->lock); 3041 3042 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3043 3044 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3045 return 0; 3046 case IWL_AGG_STARTING: 3047 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3048 /* 3049 * The agg session has been stopped before it was set up. This 3050 * can happen when the AddBA timer times out for example. 3051 */ 3052 3053 /* No barriers since we are under mutex */ 3054 lockdep_assert_held(&mvm->mutex); 3055 3056 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3057 tid_data->state = IWL_AGG_OFF; 3058 err = 0; 3059 break; 3060 default: 3061 IWL_ERR(mvm, 3062 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3063 mvmsta->sta_id, tid, tid_data->state); 3064 IWL_ERR(mvm, 3065 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3066 err = -EINVAL; 3067 } 3068 3069 spin_unlock_bh(&mvmsta->lock); 3070 3071 return err; 3072 } 3073 3074 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3075 struct ieee80211_sta *sta, u16 tid) 3076 { 3077 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3078 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3079 u16 txq_id; 3080 enum iwl_mvm_agg_state old_state; 3081 3082 /* 3083 * First set the agg state to OFF to avoid calling 3084 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3085 */ 3086 spin_lock_bh(&mvmsta->lock); 3087 txq_id = tid_data->txq_id; 3088 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3089 mvmsta->sta_id, tid, txq_id, tid_data->state); 3090 old_state = tid_data->state; 3091 tid_data->state = IWL_AGG_OFF; 3092 mvmsta->agg_tids &= ~BIT(tid); 3093 spin_unlock_bh(&mvmsta->lock); 3094 3095 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3096 3097 if (old_state >= IWL_AGG_ON) { 3098 iwl_mvm_drain_sta(mvm, mvmsta, true); 3099 3100 if (iwl_mvm_has_new_tx_api(mvm)) { 3101 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3102 BIT(tid), 0)) 3103 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3104 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3105 } else { 3106 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3107 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3108 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3109 } 3110 3111 iwl_mvm_drain_sta(mvm, mvmsta, false); 3112 3113 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3114 } 3115 3116 return 0; 3117 } 3118 3119 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3120 { 3121 int i, max = -1, max_offs = -1; 3122 3123 lockdep_assert_held(&mvm->mutex); 3124 3125 /* Pick the unused key offset with the highest 'deleted' 3126 * counter. Every time a key is deleted, all the counters 3127 * are incremented and the one that was just deleted is 3128 * reset to zero. Thus, the highest counter is the one 3129 * that was deleted longest ago. Pick that one. 3130 */ 3131 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3132 if (test_bit(i, mvm->fw_key_table)) 3133 continue; 3134 if (mvm->fw_key_deleted[i] > max) { 3135 max = mvm->fw_key_deleted[i]; 3136 max_offs = i; 3137 } 3138 } 3139 3140 if (max_offs < 0) 3141 return STA_KEY_IDX_INVALID; 3142 3143 return max_offs; 3144 } 3145 3146 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3147 struct ieee80211_vif *vif, 3148 struct ieee80211_sta *sta) 3149 { 3150 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3151 3152 if (sta) 3153 return iwl_mvm_sta_from_mac80211(sta); 3154 3155 /* 3156 * The device expects GTKs for station interfaces to be 3157 * installed as GTKs for the AP station. If we have no 3158 * station ID, then use AP's station ID. 3159 */ 3160 if (vif->type == NL80211_IFTYPE_STATION && 3161 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3162 u8 sta_id = mvmvif->ap_sta_id; 3163 3164 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3165 lockdep_is_held(&mvm->mutex)); 3166 3167 /* 3168 * It is possible that the 'sta' parameter is NULL, 3169 * for example when a GTK is removed - the sta_id will then 3170 * be the AP ID, and no station was passed by mac80211. 3171 */ 3172 if (IS_ERR_OR_NULL(sta)) 3173 return NULL; 3174 3175 return iwl_mvm_sta_from_mac80211(sta); 3176 } 3177 3178 return NULL; 3179 } 3180 3181 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3182 u32 sta_id, 3183 struct ieee80211_key_conf *key, bool mcast, 3184 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3185 u8 key_offset, bool mfp) 3186 { 3187 union { 3188 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3189 struct iwl_mvm_add_sta_key_cmd cmd; 3190 } u = {}; 3191 __le16 key_flags; 3192 int ret; 3193 u32 status; 3194 u16 keyidx; 3195 u64 pn = 0; 3196 int i, size; 3197 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3198 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3199 3200 if (sta_id == IWL_MVM_INVALID_STA) 3201 return -EINVAL; 3202 3203 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3204 STA_KEY_FLG_KEYID_MSK; 3205 key_flags = cpu_to_le16(keyidx); 3206 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3207 3208 switch (key->cipher) { 3209 case WLAN_CIPHER_SUITE_TKIP: 3210 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3211 if (new_api) { 3212 memcpy((void *)&u.cmd.tx_mic_key, 3213 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3214 IWL_MIC_KEY_SIZE); 3215 3216 memcpy((void *)&u.cmd.rx_mic_key, 3217 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3218 IWL_MIC_KEY_SIZE); 3219 pn = atomic64_read(&key->tx_pn); 3220 3221 } else { 3222 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3223 for (i = 0; i < 5; i++) 3224 u.cmd_v1.tkip_rx_ttak[i] = 3225 cpu_to_le16(tkip_p1k[i]); 3226 } 3227 memcpy(u.cmd.common.key, key->key, key->keylen); 3228 break; 3229 case WLAN_CIPHER_SUITE_CCMP: 3230 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3231 memcpy(u.cmd.common.key, key->key, key->keylen); 3232 if (new_api) 3233 pn = atomic64_read(&key->tx_pn); 3234 break; 3235 case WLAN_CIPHER_SUITE_WEP104: 3236 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3237 /* fall through */ 3238 case WLAN_CIPHER_SUITE_WEP40: 3239 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3240 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3241 break; 3242 case WLAN_CIPHER_SUITE_GCMP_256: 3243 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3244 /* fall through */ 3245 case WLAN_CIPHER_SUITE_GCMP: 3246 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3247 memcpy(u.cmd.common.key, key->key, key->keylen); 3248 if (new_api) 3249 pn = atomic64_read(&key->tx_pn); 3250 break; 3251 default: 3252 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3253 memcpy(u.cmd.common.key, key->key, key->keylen); 3254 } 3255 3256 if (mcast) 3257 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3258 if (mfp) 3259 key_flags |= cpu_to_le16(STA_KEY_MFP); 3260 3261 u.cmd.common.key_offset = key_offset; 3262 u.cmd.common.key_flags = key_flags; 3263 u.cmd.common.sta_id = sta_id; 3264 3265 if (new_api) { 3266 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3267 size = sizeof(u.cmd); 3268 } else { 3269 size = sizeof(u.cmd_v1); 3270 } 3271 3272 status = ADD_STA_SUCCESS; 3273 if (cmd_flags & CMD_ASYNC) 3274 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3275 &u.cmd); 3276 else 3277 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3278 &u.cmd, &status); 3279 3280 switch (status) { 3281 case ADD_STA_SUCCESS: 3282 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3283 break; 3284 default: 3285 ret = -EIO; 3286 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3287 break; 3288 } 3289 3290 return ret; 3291 } 3292 3293 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3294 struct ieee80211_key_conf *keyconf, 3295 u8 sta_id, bool remove_key) 3296 { 3297 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3298 3299 /* verify the key details match the required command's expectations */ 3300 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3301 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3302 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3303 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3304 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3305 return -EINVAL; 3306 3307 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3308 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3309 return -EINVAL; 3310 3311 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3312 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3313 3314 if (remove_key) { 3315 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3316 } else { 3317 struct ieee80211_key_seq seq; 3318 const u8 *pn; 3319 3320 switch (keyconf->cipher) { 3321 case WLAN_CIPHER_SUITE_AES_CMAC: 3322 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3323 break; 3324 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3325 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3326 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3327 break; 3328 default: 3329 return -EINVAL; 3330 } 3331 3332 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3333 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3334 igtk_cmd.ctrl_flags |= 3335 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3336 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3337 pn = seq.aes_cmac.pn; 3338 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3339 ((u64) pn[4] << 8) | 3340 ((u64) pn[3] << 16) | 3341 ((u64) pn[2] << 24) | 3342 ((u64) pn[1] << 32) | 3343 ((u64) pn[0] << 40)); 3344 } 3345 3346 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3347 remove_key ? "removing" : "installing", 3348 igtk_cmd.sta_id); 3349 3350 if (!iwl_mvm_has_new_rx_api(mvm)) { 3351 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3352 .ctrl_flags = igtk_cmd.ctrl_flags, 3353 .key_id = igtk_cmd.key_id, 3354 .sta_id = igtk_cmd.sta_id, 3355 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3356 }; 3357 3358 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3359 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3360 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3361 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3362 } 3363 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3364 sizeof(igtk_cmd), &igtk_cmd); 3365 } 3366 3367 3368 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3369 struct ieee80211_vif *vif, 3370 struct ieee80211_sta *sta) 3371 { 3372 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3373 3374 if (sta) 3375 return sta->addr; 3376 3377 if (vif->type == NL80211_IFTYPE_STATION && 3378 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3379 u8 sta_id = mvmvif->ap_sta_id; 3380 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3381 lockdep_is_held(&mvm->mutex)); 3382 return sta->addr; 3383 } 3384 3385 3386 return NULL; 3387 } 3388 3389 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3390 struct ieee80211_vif *vif, 3391 struct ieee80211_sta *sta, 3392 struct ieee80211_key_conf *keyconf, 3393 u8 key_offset, 3394 bool mcast) 3395 { 3396 int ret; 3397 const u8 *addr; 3398 struct ieee80211_key_seq seq; 3399 u16 p1k[5]; 3400 u32 sta_id; 3401 bool mfp = false; 3402 3403 if (sta) { 3404 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3405 3406 sta_id = mvm_sta->sta_id; 3407 mfp = sta->mfp; 3408 } else if (vif->type == NL80211_IFTYPE_AP && 3409 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3410 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3411 3412 sta_id = mvmvif->mcast_sta.sta_id; 3413 } else { 3414 IWL_ERR(mvm, "Failed to find station id\n"); 3415 return -EINVAL; 3416 } 3417 3418 switch (keyconf->cipher) { 3419 case WLAN_CIPHER_SUITE_TKIP: 3420 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3421 /* get phase 1 key from mac80211 */ 3422 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3423 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3424 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3425 seq.tkip.iv32, p1k, 0, key_offset, 3426 mfp); 3427 break; 3428 case WLAN_CIPHER_SUITE_CCMP: 3429 case WLAN_CIPHER_SUITE_WEP40: 3430 case WLAN_CIPHER_SUITE_WEP104: 3431 case WLAN_CIPHER_SUITE_GCMP: 3432 case WLAN_CIPHER_SUITE_GCMP_256: 3433 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3434 0, NULL, 0, key_offset, mfp); 3435 break; 3436 default: 3437 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3438 0, NULL, 0, key_offset, mfp); 3439 } 3440 3441 return ret; 3442 } 3443 3444 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3445 struct ieee80211_vif *vif, 3446 struct ieee80211_sta *sta, 3447 struct ieee80211_key_conf *keyconf, 3448 u8 key_offset) 3449 { 3450 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3451 struct iwl_mvm_sta *mvm_sta; 3452 u8 sta_id = IWL_MVM_INVALID_STA; 3453 int ret; 3454 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3455 3456 lockdep_assert_held(&mvm->mutex); 3457 3458 if (vif->type != NL80211_IFTYPE_AP || 3459 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3460 /* Get the station id from the mvm local station table */ 3461 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3462 if (!mvm_sta) { 3463 IWL_ERR(mvm, "Failed to find station\n"); 3464 return -EINVAL; 3465 } 3466 sta_id = mvm_sta->sta_id; 3467 3468 /* 3469 * It is possible that the 'sta' parameter is NULL, and thus 3470 * there is a need to retrieve the sta from the local station 3471 * table. 3472 */ 3473 if (!sta) { 3474 sta = rcu_dereference_protected( 3475 mvm->fw_id_to_mac_id[sta_id], 3476 lockdep_is_held(&mvm->mutex)); 3477 if (IS_ERR_OR_NULL(sta)) { 3478 IWL_ERR(mvm, "Invalid station id\n"); 3479 return -EINVAL; 3480 } 3481 } 3482 3483 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3484 return -EINVAL; 3485 } else { 3486 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3487 3488 sta_id = mvmvif->mcast_sta.sta_id; 3489 } 3490 3491 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3492 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3493 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3494 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3495 goto end; 3496 } 3497 3498 /* If the key_offset is not pre-assigned, we need to find a 3499 * new offset to use. In normal cases, the offset is not 3500 * pre-assigned, but during HW_RESTART we want to reuse the 3501 * same indices, so we pass them when this function is called. 3502 * 3503 * In D3 entry, we need to hardcoded the indices (because the 3504 * firmware hardcodes the PTK offset to 0). In this case, we 3505 * need to make sure we don't overwrite the hw_key_idx in the 3506 * keyconf structure, because otherwise we cannot configure 3507 * the original ones back when resuming. 3508 */ 3509 if (key_offset == STA_KEY_IDX_INVALID) { 3510 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3511 if (key_offset == STA_KEY_IDX_INVALID) 3512 return -ENOSPC; 3513 keyconf->hw_key_idx = key_offset; 3514 } 3515 3516 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3517 if (ret) 3518 goto end; 3519 3520 /* 3521 * For WEP, the same key is used for multicast and unicast. Upload it 3522 * again, using the same key offset, and now pointing the other one 3523 * to the same key slot (offset). 3524 * If this fails, remove the original as well. 3525 */ 3526 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3527 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3528 sta) { 3529 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3530 key_offset, !mcast); 3531 if (ret) { 3532 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3533 goto end; 3534 } 3535 } 3536 3537 __set_bit(key_offset, mvm->fw_key_table); 3538 3539 end: 3540 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3541 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3542 sta ? sta->addr : zero_addr, ret); 3543 return ret; 3544 } 3545 3546 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3547 struct ieee80211_vif *vif, 3548 struct ieee80211_sta *sta, 3549 struct ieee80211_key_conf *keyconf) 3550 { 3551 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3552 struct iwl_mvm_sta *mvm_sta; 3553 u8 sta_id = IWL_MVM_INVALID_STA; 3554 int ret, i; 3555 3556 lockdep_assert_held(&mvm->mutex); 3557 3558 /* Get the station from the mvm local station table */ 3559 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3560 if (mvm_sta) 3561 sta_id = mvm_sta->sta_id; 3562 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3563 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3564 3565 3566 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3567 keyconf->keyidx, sta_id); 3568 3569 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3570 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3571 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3572 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3573 3574 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3575 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3576 keyconf->hw_key_idx); 3577 return -ENOENT; 3578 } 3579 3580 /* track which key was deleted last */ 3581 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3582 if (mvm->fw_key_deleted[i] < U8_MAX) 3583 mvm->fw_key_deleted[i]++; 3584 } 3585 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3586 3587 if (sta && !mvm_sta) { 3588 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3589 return 0; 3590 } 3591 3592 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3593 if (ret) 3594 return ret; 3595 3596 /* delete WEP key twice to get rid of (now useless) offset */ 3597 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3598 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3599 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3600 3601 return ret; 3602 } 3603 3604 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3605 struct ieee80211_vif *vif, 3606 struct ieee80211_key_conf *keyconf, 3607 struct ieee80211_sta *sta, u32 iv32, 3608 u16 *phase1key) 3609 { 3610 struct iwl_mvm_sta *mvm_sta; 3611 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3612 bool mfp = sta ? sta->mfp : false; 3613 3614 rcu_read_lock(); 3615 3616 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3617 if (WARN_ON_ONCE(!mvm_sta)) 3618 goto unlock; 3619 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3620 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3621 mfp); 3622 3623 unlock: 3624 rcu_read_unlock(); 3625 } 3626 3627 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3628 struct ieee80211_sta *sta) 3629 { 3630 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3631 struct iwl_mvm_add_sta_cmd cmd = { 3632 .add_modify = STA_MODE_MODIFY, 3633 .sta_id = mvmsta->sta_id, 3634 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3635 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3636 }; 3637 int ret; 3638 3639 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3640 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3641 if (ret) 3642 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3643 } 3644 3645 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3646 struct ieee80211_sta *sta, 3647 enum ieee80211_frame_release_type reason, 3648 u16 cnt, u16 tids, bool more_data, 3649 bool single_sta_queue) 3650 { 3651 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3652 struct iwl_mvm_add_sta_cmd cmd = { 3653 .add_modify = STA_MODE_MODIFY, 3654 .sta_id = mvmsta->sta_id, 3655 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3656 .sleep_tx_count = cpu_to_le16(cnt), 3657 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3658 }; 3659 int tid, ret; 3660 unsigned long _tids = tids; 3661 3662 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3663 * Note that this field is reserved and unused by firmware not 3664 * supporting GO uAPSD, so it's safe to always do this. 3665 */ 3666 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3667 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3668 3669 /* If we're releasing frames from aggregation or dqa queues then check 3670 * if all the queues that we're releasing frames from, combined, have: 3671 * - more frames than the service period, in which case more_data 3672 * needs to be set 3673 * - fewer than 'cnt' frames, in which case we need to adjust the 3674 * firmware command (but do that unconditionally) 3675 */ 3676 if (single_sta_queue) { 3677 int remaining = cnt; 3678 int sleep_tx_count; 3679 3680 spin_lock_bh(&mvmsta->lock); 3681 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3682 struct iwl_mvm_tid_data *tid_data; 3683 u16 n_queued; 3684 3685 tid_data = &mvmsta->tid_data[tid]; 3686 3687 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3688 if (n_queued > remaining) { 3689 more_data = true; 3690 remaining = 0; 3691 break; 3692 } 3693 remaining -= n_queued; 3694 } 3695 sleep_tx_count = cnt - remaining; 3696 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3697 mvmsta->sleep_tx_count = sleep_tx_count; 3698 spin_unlock_bh(&mvmsta->lock); 3699 3700 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3701 if (WARN_ON(cnt - remaining == 0)) { 3702 ieee80211_sta_eosp(sta); 3703 return; 3704 } 3705 } 3706 3707 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3708 if (more_data) 3709 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3710 3711 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3712 mvmsta->next_status_eosp = true; 3713 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3714 } else { 3715 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3716 } 3717 3718 /* block the Tx queues until the FW updated the sleep Tx count */ 3719 iwl_trans_block_txq_ptrs(mvm->trans, true); 3720 3721 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3722 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3723 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3724 if (ret) 3725 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3726 } 3727 3728 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3729 struct iwl_rx_cmd_buffer *rxb) 3730 { 3731 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3732 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3733 struct ieee80211_sta *sta; 3734 u32 sta_id = le32_to_cpu(notif->sta_id); 3735 3736 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3737 return; 3738 3739 rcu_read_lock(); 3740 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3741 if (!IS_ERR_OR_NULL(sta)) 3742 ieee80211_sta_eosp(sta); 3743 rcu_read_unlock(); 3744 } 3745 3746 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3747 struct iwl_mvm_sta *mvmsta, bool disable) 3748 { 3749 struct iwl_mvm_add_sta_cmd cmd = { 3750 .add_modify = STA_MODE_MODIFY, 3751 .sta_id = mvmsta->sta_id, 3752 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3753 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3754 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3755 }; 3756 int ret; 3757 3758 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3759 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3760 if (ret) 3761 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3762 } 3763 3764 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3765 struct ieee80211_sta *sta, 3766 bool disable) 3767 { 3768 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3769 3770 spin_lock_bh(&mvm_sta->lock); 3771 3772 if (mvm_sta->disable_tx == disable) { 3773 spin_unlock_bh(&mvm_sta->lock); 3774 return; 3775 } 3776 3777 mvm_sta->disable_tx = disable; 3778 3779 /* Tell mac80211 to start/stop queuing tx for this station */ 3780 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3781 3782 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3783 3784 spin_unlock_bh(&mvm_sta->lock); 3785 } 3786 3787 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3788 struct iwl_mvm_vif *mvmvif, 3789 struct iwl_mvm_int_sta *sta, 3790 bool disable) 3791 { 3792 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3793 struct iwl_mvm_add_sta_cmd cmd = { 3794 .add_modify = STA_MODE_MODIFY, 3795 .sta_id = sta->sta_id, 3796 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3797 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3798 .mac_id_n_color = cpu_to_le32(id), 3799 }; 3800 int ret; 3801 3802 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3803 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3804 if (ret) 3805 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3806 } 3807 3808 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3809 struct iwl_mvm_vif *mvmvif, 3810 bool disable) 3811 { 3812 struct ieee80211_sta *sta; 3813 struct iwl_mvm_sta *mvm_sta; 3814 int i; 3815 3816 lockdep_assert_held(&mvm->mutex); 3817 3818 /* Block/unblock all the stations of the given mvmvif */ 3819 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3820 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3821 lockdep_is_held(&mvm->mutex)); 3822 if (IS_ERR_OR_NULL(sta)) 3823 continue; 3824 3825 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3826 if (mvm_sta->mac_id_n_color != 3827 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3828 continue; 3829 3830 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3831 } 3832 3833 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3834 return; 3835 3836 /* Need to block/unblock also multicast station */ 3837 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3838 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3839 &mvmvif->mcast_sta, disable); 3840 3841 /* 3842 * Only unblock the broadcast station (FW blocks it for immediate 3843 * quiet, not the driver) 3844 */ 3845 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3846 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3847 &mvmvif->bcast_sta, disable); 3848 } 3849 3850 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3851 { 3852 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3853 struct iwl_mvm_sta *mvmsta; 3854 3855 rcu_read_lock(); 3856 3857 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3858 3859 if (!WARN_ON(!mvmsta)) 3860 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3861 3862 rcu_read_unlock(); 3863 } 3864 3865 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3866 { 3867 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3868 3869 /* 3870 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3871 * to align the wrap around of ssn so we compare relevant values. 3872 */ 3873 if (mvm->trans->cfg->gen2) 3874 sn &= 0xff; 3875 3876 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3877 } 3878