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 else 1688 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1689 1690 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1691 1692 update_fw: 1693 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1694 if (ret) 1695 goto err; 1696 1697 if (vif->type == NL80211_IFTYPE_STATION) { 1698 if (!sta->tdls) { 1699 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1700 mvmvif->ap_sta_id = sta_id; 1701 } else { 1702 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1703 } 1704 } 1705 1706 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1707 1708 return 0; 1709 1710 err: 1711 return ret; 1712 } 1713 1714 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1715 bool drain) 1716 { 1717 struct iwl_mvm_add_sta_cmd cmd = {}; 1718 int ret; 1719 u32 status; 1720 1721 lockdep_assert_held(&mvm->mutex); 1722 1723 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1724 cmd.sta_id = mvmsta->sta_id; 1725 cmd.add_modify = STA_MODE_MODIFY; 1726 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1727 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1728 1729 status = ADD_STA_SUCCESS; 1730 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1731 iwl_mvm_add_sta_cmd_size(mvm), 1732 &cmd, &status); 1733 if (ret) 1734 return ret; 1735 1736 switch (status & IWL_ADD_STA_STATUS_MASK) { 1737 case ADD_STA_SUCCESS: 1738 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1739 mvmsta->sta_id); 1740 break; 1741 default: 1742 ret = -EIO; 1743 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1744 mvmsta->sta_id); 1745 break; 1746 } 1747 1748 return ret; 1749 } 1750 1751 /* 1752 * Remove a station from the FW table. Before sending the command to remove 1753 * the station validate that the station is indeed known to the driver (sanity 1754 * only). 1755 */ 1756 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1757 { 1758 struct ieee80211_sta *sta; 1759 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1760 .sta_id = sta_id, 1761 }; 1762 int ret; 1763 1764 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1765 lockdep_is_held(&mvm->mutex)); 1766 1767 /* Note: internal stations are marked as error values */ 1768 if (!sta) { 1769 IWL_ERR(mvm, "Invalid station id\n"); 1770 return -EINVAL; 1771 } 1772 1773 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1774 sizeof(rm_sta_cmd), &rm_sta_cmd); 1775 if (ret) { 1776 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1777 return ret; 1778 } 1779 1780 return 0; 1781 } 1782 1783 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1784 struct ieee80211_vif *vif, 1785 struct ieee80211_sta *sta) 1786 { 1787 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1788 int i; 1789 1790 lockdep_assert_held(&mvm->mutex); 1791 1792 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1793 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1794 continue; 1795 1796 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1797 0); 1798 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1799 } 1800 1801 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1802 struct iwl_mvm_txq *mvmtxq = 1803 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1804 1805 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1806 } 1807 } 1808 1809 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1810 struct iwl_mvm_sta *mvm_sta) 1811 { 1812 int i; 1813 1814 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1815 u16 txq_id; 1816 int ret; 1817 1818 spin_lock_bh(&mvm_sta->lock); 1819 txq_id = mvm_sta->tid_data[i].txq_id; 1820 spin_unlock_bh(&mvm_sta->lock); 1821 1822 if (txq_id == IWL_MVM_INVALID_QUEUE) 1823 continue; 1824 1825 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1826 if (ret) 1827 return ret; 1828 } 1829 1830 return 0; 1831 } 1832 1833 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1834 struct ieee80211_vif *vif, 1835 struct ieee80211_sta *sta) 1836 { 1837 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1838 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1839 u8 sta_id = mvm_sta->sta_id; 1840 int ret; 1841 1842 lockdep_assert_held(&mvm->mutex); 1843 1844 if (iwl_mvm_has_new_rx_api(mvm)) 1845 kfree(mvm_sta->dup_data); 1846 1847 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1848 if (ret) 1849 return ret; 1850 1851 /* flush its queues here since we are freeing mvm_sta */ 1852 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1853 if (ret) 1854 return ret; 1855 if (iwl_mvm_has_new_tx_api(mvm)) { 1856 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1857 } else { 1858 u32 q_mask = mvm_sta->tfd_queue_msk; 1859 1860 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1861 q_mask); 1862 } 1863 if (ret) 1864 return ret; 1865 1866 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1867 1868 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1869 1870 /* If there is a TXQ still marked as reserved - free it */ 1871 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1872 u8 reserved_txq = mvm_sta->reserved_queue; 1873 enum iwl_mvm_queue_status *status; 1874 1875 /* 1876 * If no traffic has gone through the reserved TXQ - it 1877 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1878 * should be manually marked as free again 1879 */ 1880 status = &mvm->queue_info[reserved_txq].status; 1881 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1882 (*status != IWL_MVM_QUEUE_FREE), 1883 "sta_id %d reserved txq %d status %d", 1884 sta_id, reserved_txq, *status)) 1885 return -EINVAL; 1886 1887 *status = IWL_MVM_QUEUE_FREE; 1888 } 1889 1890 if (vif->type == NL80211_IFTYPE_STATION && 1891 mvmvif->ap_sta_id == sta_id) { 1892 /* if associated - we can't remove the AP STA now */ 1893 if (vif->bss_conf.assoc) 1894 return ret; 1895 1896 /* unassoc - go ahead - remove the AP STA now */ 1897 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1898 1899 /* clear d0i3_ap_sta_id if no longer relevant */ 1900 if (mvm->d0i3_ap_sta_id == sta_id) 1901 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1902 } 1903 1904 /* 1905 * This shouldn't happen - the TDLS channel switch should be canceled 1906 * before the STA is removed. 1907 */ 1908 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1909 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1910 cancel_delayed_work(&mvm->tdls_cs.dwork); 1911 } 1912 1913 /* 1914 * Make sure that the tx response code sees the station as -EBUSY and 1915 * calls the drain worker. 1916 */ 1917 spin_lock_bh(&mvm_sta->lock); 1918 spin_unlock_bh(&mvm_sta->lock); 1919 1920 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1921 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1922 1923 return ret; 1924 } 1925 1926 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1927 struct ieee80211_vif *vif, 1928 u8 sta_id) 1929 { 1930 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1931 1932 lockdep_assert_held(&mvm->mutex); 1933 1934 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1935 return ret; 1936 } 1937 1938 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1939 struct iwl_mvm_int_sta *sta, 1940 u32 qmask, enum nl80211_iftype iftype, 1941 enum iwl_sta_type type) 1942 { 1943 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1944 sta->sta_id == IWL_MVM_INVALID_STA) { 1945 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1946 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1947 return -ENOSPC; 1948 } 1949 1950 sta->tfd_queue_msk = qmask; 1951 sta->type = type; 1952 1953 /* put a non-NULL value so iterating over the stations won't stop */ 1954 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1955 return 0; 1956 } 1957 1958 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1959 { 1960 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1961 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1962 sta->sta_id = IWL_MVM_INVALID_STA; 1963 } 1964 1965 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1966 u8 sta_id, u8 fifo) 1967 { 1968 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1969 mvm->cfg->base_params->wd_timeout : 1970 IWL_WATCHDOG_DISABLED; 1971 1972 if (iwl_mvm_has_new_tx_api(mvm)) { 1973 int tvqm_queue = 1974 iwl_mvm_tvqm_enable_txq(mvm, sta_id, 1975 IWL_MAX_TID_COUNT, 1976 wdg_timeout); 1977 *queue = tvqm_queue; 1978 } else { 1979 struct iwl_trans_txq_scd_cfg cfg = { 1980 .fifo = fifo, 1981 .sta_id = sta_id, 1982 .tid = IWL_MAX_TID_COUNT, 1983 .aggregate = false, 1984 .frame_limit = IWL_FRAME_LIMIT, 1985 }; 1986 1987 iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout); 1988 } 1989 } 1990 1991 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1992 { 1993 int ret; 1994 1995 lockdep_assert_held(&mvm->mutex); 1996 1997 /* Allocate aux station and assign to it the aux queue */ 1998 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1999 NL80211_IFTYPE_UNSPECIFIED, 2000 IWL_STA_AUX_ACTIVITY); 2001 if (ret) 2002 return ret; 2003 2004 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 2005 if (!iwl_mvm_has_new_tx_api(mvm)) 2006 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2007 mvm->aux_sta.sta_id, 2008 IWL_MVM_TX_FIFO_MCAST); 2009 2010 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 2011 MAC_INDEX_AUX, 0); 2012 if (ret) { 2013 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2014 return ret; 2015 } 2016 2017 /* 2018 * For 22000 firmware and on we cannot add queue to a station unknown 2019 * to firmware so enable queue here - after the station was added 2020 */ 2021 if (iwl_mvm_has_new_tx_api(mvm)) 2022 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 2023 mvm->aux_sta.sta_id, 2024 IWL_MVM_TX_FIFO_MCAST); 2025 2026 return 0; 2027 } 2028 2029 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2030 { 2031 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2032 int ret; 2033 2034 lockdep_assert_held(&mvm->mutex); 2035 2036 /* Map snif queue to fifo - must happen before adding snif station */ 2037 if (!iwl_mvm_has_new_tx_api(mvm)) 2038 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2039 mvm->snif_sta.sta_id, 2040 IWL_MVM_TX_FIFO_BE); 2041 2042 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 2043 mvmvif->id, 0); 2044 if (ret) 2045 return ret; 2046 2047 /* 2048 * For 22000 firmware and on we cannot add queue to a station unknown 2049 * to firmware so enable queue here - after the station was added 2050 */ 2051 if (iwl_mvm_has_new_tx_api(mvm)) 2052 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 2053 mvm->snif_sta.sta_id, 2054 IWL_MVM_TX_FIFO_BE); 2055 2056 return 0; 2057 } 2058 2059 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2060 { 2061 int ret; 2062 2063 lockdep_assert_held(&mvm->mutex); 2064 2065 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2066 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2067 if (ret) 2068 IWL_WARN(mvm, "Failed sending remove station\n"); 2069 2070 return ret; 2071 } 2072 2073 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2074 { 2075 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2076 } 2077 2078 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 2079 { 2080 lockdep_assert_held(&mvm->mutex); 2081 2082 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2083 } 2084 2085 /* 2086 * Send the add station command for the vif's broadcast station. 2087 * Assumes that the station was already allocated. 2088 * 2089 * @mvm: the mvm component 2090 * @vif: the interface to which the broadcast station is added 2091 * @bsta: the broadcast station to add. 2092 */ 2093 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2094 { 2095 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2096 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2097 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2098 const u8 *baddr = _baddr; 2099 int queue; 2100 int ret; 2101 unsigned int wdg_timeout = 2102 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2103 struct iwl_trans_txq_scd_cfg cfg = { 2104 .fifo = IWL_MVM_TX_FIFO_VO, 2105 .sta_id = mvmvif->bcast_sta.sta_id, 2106 .tid = IWL_MAX_TID_COUNT, 2107 .aggregate = false, 2108 .frame_limit = IWL_FRAME_LIMIT, 2109 }; 2110 2111 lockdep_assert_held(&mvm->mutex); 2112 2113 if (!iwl_mvm_has_new_tx_api(mvm)) { 2114 if (vif->type == NL80211_IFTYPE_AP || 2115 vif->type == NL80211_IFTYPE_ADHOC) { 2116 queue = mvm->probe_queue; 2117 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2118 queue = mvm->p2p_dev_queue; 2119 } else { 2120 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2121 return -EINVAL; 2122 } 2123 2124 bsta->tfd_queue_msk |= BIT(queue); 2125 2126 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2127 } 2128 2129 if (vif->type == NL80211_IFTYPE_ADHOC) 2130 baddr = vif->bss_conf.bssid; 2131 2132 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2133 return -ENOSPC; 2134 2135 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2136 mvmvif->id, mvmvif->color); 2137 if (ret) 2138 return ret; 2139 2140 /* 2141 * For 22000 firmware and on we cannot add queue to a station unknown 2142 * to firmware so enable queue here - after the station was added 2143 */ 2144 if (iwl_mvm_has_new_tx_api(mvm)) { 2145 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2146 IWL_MAX_TID_COUNT, 2147 wdg_timeout); 2148 2149 if (vif->type == NL80211_IFTYPE_AP || 2150 vif->type == NL80211_IFTYPE_ADHOC) 2151 mvm->probe_queue = queue; 2152 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2153 mvm->p2p_dev_queue = queue; 2154 } 2155 2156 return 0; 2157 } 2158 2159 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2160 struct ieee80211_vif *vif) 2161 { 2162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2163 int queue; 2164 2165 lockdep_assert_held(&mvm->mutex); 2166 2167 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2168 2169 switch (vif->type) { 2170 case NL80211_IFTYPE_AP: 2171 case NL80211_IFTYPE_ADHOC: 2172 queue = mvm->probe_queue; 2173 break; 2174 case NL80211_IFTYPE_P2P_DEVICE: 2175 queue = mvm->p2p_dev_queue; 2176 break; 2177 default: 2178 WARN(1, "Can't free bcast queue on vif type %d\n", 2179 vif->type); 2180 return; 2181 } 2182 2183 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2184 if (iwl_mvm_has_new_tx_api(mvm)) 2185 return; 2186 2187 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2188 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2189 } 2190 2191 /* Send the FW a request to remove the station from it's internal data 2192 * structures, but DO NOT remove the entry from the local data structures. */ 2193 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2194 { 2195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2196 int ret; 2197 2198 lockdep_assert_held(&mvm->mutex); 2199 2200 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2201 2202 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2203 if (ret) 2204 IWL_WARN(mvm, "Failed sending remove station\n"); 2205 return ret; 2206 } 2207 2208 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2209 { 2210 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2211 2212 lockdep_assert_held(&mvm->mutex); 2213 2214 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2215 ieee80211_vif_type_p2p(vif), 2216 IWL_STA_GENERAL_PURPOSE); 2217 } 2218 2219 /* Allocate a new station entry for the broadcast station to the given vif, 2220 * and send it to the FW. 2221 * Note that each P2P mac should have its own broadcast station. 2222 * 2223 * @mvm: the mvm component 2224 * @vif: the interface to which the broadcast station is added 2225 * @bsta: the broadcast station to add. */ 2226 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2227 { 2228 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2229 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2230 int ret; 2231 2232 lockdep_assert_held(&mvm->mutex); 2233 2234 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2235 if (ret) 2236 return ret; 2237 2238 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2239 2240 if (ret) 2241 iwl_mvm_dealloc_int_sta(mvm, bsta); 2242 2243 return ret; 2244 } 2245 2246 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2247 { 2248 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2249 2250 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2251 } 2252 2253 /* 2254 * Send the FW a request to remove the station from it's internal data 2255 * structures, and in addition remove it from the local data structure. 2256 */ 2257 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2258 { 2259 int ret; 2260 2261 lockdep_assert_held(&mvm->mutex); 2262 2263 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2264 2265 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2266 2267 return ret; 2268 } 2269 2270 /* 2271 * Allocate a new station entry for the multicast station to the given vif, 2272 * and send it to the FW. 2273 * Note that each AP/GO mac should have its own multicast station. 2274 * 2275 * @mvm: the mvm component 2276 * @vif: the interface to which the multicast station is added 2277 */ 2278 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2279 { 2280 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2281 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2282 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2283 const u8 *maddr = _maddr; 2284 struct iwl_trans_txq_scd_cfg cfg = { 2285 .fifo = vif->type == NL80211_IFTYPE_AP ? 2286 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2287 .sta_id = msta->sta_id, 2288 .tid = 0, 2289 .aggregate = false, 2290 .frame_limit = IWL_FRAME_LIMIT, 2291 }; 2292 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2293 int ret; 2294 2295 lockdep_assert_held(&mvm->mutex); 2296 2297 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2298 vif->type != NL80211_IFTYPE_ADHOC)) 2299 return -ENOTSUPP; 2300 2301 /* 2302 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2303 * invalid, so make sure we use the queue we want. 2304 * Note that this is done here as we want to avoid making DQA 2305 * changes in mac80211 layer. 2306 */ 2307 if (vif->type == NL80211_IFTYPE_ADHOC) 2308 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2309 2310 /* 2311 * While in previous FWs we had to exclude cab queue from TFD queue 2312 * mask, now it is needed as any other queue. 2313 */ 2314 if (!iwl_mvm_has_new_tx_api(mvm) && 2315 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2316 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2317 timeout); 2318 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2319 } 2320 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2321 mvmvif->id, mvmvif->color); 2322 if (ret) { 2323 iwl_mvm_dealloc_int_sta(mvm, msta); 2324 return ret; 2325 } 2326 2327 /* 2328 * Enable cab queue after the ADD_STA command is sent. 2329 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2330 * command with unknown station id, and for FW that doesn't support 2331 * station API since the cab queue is not included in the 2332 * tfd_queue_mask. 2333 */ 2334 if (iwl_mvm_has_new_tx_api(mvm)) { 2335 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2336 0, 2337 timeout); 2338 mvmvif->cab_queue = queue; 2339 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2340 IWL_UCODE_TLV_API_STA_TYPE)) 2341 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2342 timeout); 2343 2344 return 0; 2345 } 2346 2347 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2348 struct ieee80211_key_conf *keyconf, 2349 bool mcast) 2350 { 2351 union { 2352 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2353 struct iwl_mvm_add_sta_key_cmd cmd; 2354 } u = {}; 2355 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2356 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2357 __le16 key_flags; 2358 int ret, size; 2359 u32 status; 2360 2361 /* This is a valid situation for GTK removal */ 2362 if (sta_id == IWL_MVM_INVALID_STA) 2363 return 0; 2364 2365 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2366 STA_KEY_FLG_KEYID_MSK); 2367 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2368 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2369 2370 if (mcast) 2371 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2372 2373 /* 2374 * The fields assigned here are in the same location at the start 2375 * of the command, so we can do this union trick. 2376 */ 2377 u.cmd.common.key_flags = key_flags; 2378 u.cmd.common.key_offset = keyconf->hw_key_idx; 2379 u.cmd.common.sta_id = sta_id; 2380 2381 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2382 2383 status = ADD_STA_SUCCESS; 2384 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2385 &status); 2386 2387 switch (status) { 2388 case ADD_STA_SUCCESS: 2389 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2390 break; 2391 default: 2392 ret = -EIO; 2393 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2394 break; 2395 } 2396 2397 return ret; 2398 } 2399 2400 /* 2401 * Send the FW a request to remove the station from it's internal data 2402 * structures, and in addition remove it from the local data structure. 2403 */ 2404 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2405 { 2406 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2407 int ret; 2408 2409 lockdep_assert_held(&mvm->mutex); 2410 2411 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2412 2413 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2414 2415 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2416 if (ret) 2417 IWL_WARN(mvm, "Failed sending remove station\n"); 2418 2419 return ret; 2420 } 2421 2422 #define IWL_MAX_RX_BA_SESSIONS 16 2423 2424 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2425 { 2426 struct iwl_mvm_rss_sync_notif notif = { 2427 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2428 .metadata.sync = 1, 2429 .delba.baid = baid, 2430 }; 2431 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2432 }; 2433 2434 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2435 struct iwl_mvm_baid_data *data) 2436 { 2437 int i; 2438 2439 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2440 2441 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2442 int j; 2443 struct iwl_mvm_reorder_buffer *reorder_buf = 2444 &data->reorder_buf[i]; 2445 struct iwl_mvm_reorder_buf_entry *entries = 2446 &data->entries[i * data->entries_per_queue]; 2447 2448 spin_lock_bh(&reorder_buf->lock); 2449 if (likely(!reorder_buf->num_stored)) { 2450 spin_unlock_bh(&reorder_buf->lock); 2451 continue; 2452 } 2453 2454 /* 2455 * This shouldn't happen in regular DELBA since the internal 2456 * delBA notification should trigger a release of all frames in 2457 * the reorder buffer. 2458 */ 2459 WARN_ON(1); 2460 2461 for (j = 0; j < reorder_buf->buf_size; j++) 2462 __skb_queue_purge(&entries[j].e.frames); 2463 /* 2464 * Prevent timer re-arm. This prevents a very far fetched case 2465 * where we timed out on the notification. There may be prior 2466 * RX frames pending in the RX queue before the notification 2467 * that might get processed between now and the actual deletion 2468 * and we would re-arm the timer although we are deleting the 2469 * reorder buffer. 2470 */ 2471 reorder_buf->removed = true; 2472 spin_unlock_bh(&reorder_buf->lock); 2473 del_timer_sync(&reorder_buf->reorder_timer); 2474 } 2475 } 2476 2477 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2478 struct iwl_mvm_baid_data *data, 2479 u16 ssn, u16 buf_size) 2480 { 2481 int i; 2482 2483 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2484 struct iwl_mvm_reorder_buffer *reorder_buf = 2485 &data->reorder_buf[i]; 2486 struct iwl_mvm_reorder_buf_entry *entries = 2487 &data->entries[i * data->entries_per_queue]; 2488 int j; 2489 2490 reorder_buf->num_stored = 0; 2491 reorder_buf->head_sn = ssn; 2492 reorder_buf->buf_size = buf_size; 2493 /* rx reorder timer */ 2494 timer_setup(&reorder_buf->reorder_timer, 2495 iwl_mvm_reorder_timer_expired, 0); 2496 spin_lock_init(&reorder_buf->lock); 2497 reorder_buf->mvm = mvm; 2498 reorder_buf->queue = i; 2499 reorder_buf->valid = false; 2500 for (j = 0; j < reorder_buf->buf_size; j++) 2501 __skb_queue_head_init(&entries[j].e.frames); 2502 } 2503 } 2504 2505 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2506 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2507 { 2508 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2509 struct iwl_mvm_add_sta_cmd cmd = {}; 2510 struct iwl_mvm_baid_data *baid_data = NULL; 2511 int ret; 2512 u32 status; 2513 2514 lockdep_assert_held(&mvm->mutex); 2515 2516 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2517 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2518 return -ENOSPC; 2519 } 2520 2521 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2522 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2523 2524 /* sparse doesn't like the __align() so don't check */ 2525 #ifndef __CHECKER__ 2526 /* 2527 * The division below will be OK if either the cache line size 2528 * can be divided by the entry size (ALIGN will round up) or if 2529 * if the entry size can be divided by the cache line size, in 2530 * which case the ALIGN() will do nothing. 2531 */ 2532 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2533 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2534 #endif 2535 2536 /* 2537 * Upward align the reorder buffer size to fill an entire cache 2538 * line for each queue, to avoid sharing cache lines between 2539 * different queues. 2540 */ 2541 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2542 2543 /* 2544 * Allocate here so if allocation fails we can bail out early 2545 * before starting the BA session in the firmware 2546 */ 2547 baid_data = kzalloc(sizeof(*baid_data) + 2548 mvm->trans->num_rx_queues * 2549 reorder_buf_size, 2550 GFP_KERNEL); 2551 if (!baid_data) 2552 return -ENOMEM; 2553 2554 /* 2555 * This division is why we need the above BUILD_BUG_ON(), 2556 * if that doesn't hold then this will not be right. 2557 */ 2558 baid_data->entries_per_queue = 2559 reorder_buf_size / sizeof(baid_data->entries[0]); 2560 } 2561 2562 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2563 cmd.sta_id = mvm_sta->sta_id; 2564 cmd.add_modify = STA_MODE_MODIFY; 2565 if (start) { 2566 cmd.add_immediate_ba_tid = (u8) tid; 2567 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2568 cmd.rx_ba_window = cpu_to_le16(buf_size); 2569 } else { 2570 cmd.remove_immediate_ba_tid = (u8) tid; 2571 } 2572 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2573 STA_MODIFY_REMOVE_BA_TID; 2574 2575 status = ADD_STA_SUCCESS; 2576 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2577 iwl_mvm_add_sta_cmd_size(mvm), 2578 &cmd, &status); 2579 if (ret) 2580 goto out_free; 2581 2582 switch (status & IWL_ADD_STA_STATUS_MASK) { 2583 case ADD_STA_SUCCESS: 2584 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2585 start ? "start" : "stopp"); 2586 break; 2587 case ADD_STA_IMMEDIATE_BA_FAILURE: 2588 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2589 ret = -ENOSPC; 2590 break; 2591 default: 2592 ret = -EIO; 2593 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2594 start ? "start" : "stopp", status); 2595 break; 2596 } 2597 2598 if (ret) 2599 goto out_free; 2600 2601 if (start) { 2602 u8 baid; 2603 2604 mvm->rx_ba_sessions++; 2605 2606 if (!iwl_mvm_has_new_rx_api(mvm)) 2607 return 0; 2608 2609 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2610 ret = -EINVAL; 2611 goto out_free; 2612 } 2613 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2614 IWL_ADD_STA_BAID_SHIFT); 2615 baid_data->baid = baid; 2616 baid_data->timeout = timeout; 2617 baid_data->last_rx = jiffies; 2618 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2619 timer_setup(&baid_data->session_timer, 2620 iwl_mvm_rx_agg_session_expired, 0); 2621 baid_data->mvm = mvm; 2622 baid_data->tid = tid; 2623 baid_data->sta_id = mvm_sta->sta_id; 2624 2625 mvm_sta->tid_to_baid[tid] = baid; 2626 if (timeout) 2627 mod_timer(&baid_data->session_timer, 2628 TU_TO_EXP_TIME(timeout * 2)); 2629 2630 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2631 /* 2632 * protect the BA data with RCU to cover a case where our 2633 * internal RX sync mechanism will timeout (not that it's 2634 * supposed to happen) and we will free the session data while 2635 * RX is being processed in parallel 2636 */ 2637 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2638 mvm_sta->sta_id, tid, baid); 2639 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2640 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2641 } else { 2642 u8 baid = mvm_sta->tid_to_baid[tid]; 2643 2644 if (mvm->rx_ba_sessions > 0) 2645 /* check that restart flow didn't zero the counter */ 2646 mvm->rx_ba_sessions--; 2647 if (!iwl_mvm_has_new_rx_api(mvm)) 2648 return 0; 2649 2650 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2651 return -EINVAL; 2652 2653 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2654 if (WARN_ON(!baid_data)) 2655 return -EINVAL; 2656 2657 /* synchronize all rx queues so we can safely delete */ 2658 iwl_mvm_free_reorder(mvm, baid_data); 2659 del_timer_sync(&baid_data->session_timer); 2660 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2661 kfree_rcu(baid_data, rcu_head); 2662 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2663 } 2664 return 0; 2665 2666 out_free: 2667 kfree(baid_data); 2668 return ret; 2669 } 2670 2671 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2672 int tid, u8 queue, bool start) 2673 { 2674 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2675 struct iwl_mvm_add_sta_cmd cmd = {}; 2676 int ret; 2677 u32 status; 2678 2679 lockdep_assert_held(&mvm->mutex); 2680 2681 if (start) { 2682 mvm_sta->tfd_queue_msk |= BIT(queue); 2683 mvm_sta->tid_disable_agg &= ~BIT(tid); 2684 } else { 2685 /* In DQA-mode the queue isn't removed on agg termination */ 2686 mvm_sta->tid_disable_agg |= BIT(tid); 2687 } 2688 2689 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2690 cmd.sta_id = mvm_sta->sta_id; 2691 cmd.add_modify = STA_MODE_MODIFY; 2692 if (!iwl_mvm_has_new_tx_api(mvm)) 2693 cmd.modify_mask = STA_MODIFY_QUEUES; 2694 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2695 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2696 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2697 2698 status = ADD_STA_SUCCESS; 2699 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2700 iwl_mvm_add_sta_cmd_size(mvm), 2701 &cmd, &status); 2702 if (ret) 2703 return ret; 2704 2705 switch (status & IWL_ADD_STA_STATUS_MASK) { 2706 case ADD_STA_SUCCESS: 2707 break; 2708 default: 2709 ret = -EIO; 2710 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2711 start ? "start" : "stopp", status); 2712 break; 2713 } 2714 2715 return ret; 2716 } 2717 2718 const u8 tid_to_mac80211_ac[] = { 2719 IEEE80211_AC_BE, 2720 IEEE80211_AC_BK, 2721 IEEE80211_AC_BK, 2722 IEEE80211_AC_BE, 2723 IEEE80211_AC_VI, 2724 IEEE80211_AC_VI, 2725 IEEE80211_AC_VO, 2726 IEEE80211_AC_VO, 2727 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2728 }; 2729 2730 static const u8 tid_to_ucode_ac[] = { 2731 AC_BE, 2732 AC_BK, 2733 AC_BK, 2734 AC_BE, 2735 AC_VI, 2736 AC_VI, 2737 AC_VO, 2738 AC_VO, 2739 }; 2740 2741 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2742 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2743 { 2744 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2745 struct iwl_mvm_tid_data *tid_data; 2746 u16 normalized_ssn; 2747 u16 txq_id; 2748 int ret; 2749 2750 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2751 return -EINVAL; 2752 2753 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2754 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2755 IWL_ERR(mvm, 2756 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2757 mvmsta->tid_data[tid].state); 2758 return -ENXIO; 2759 } 2760 2761 lockdep_assert_held(&mvm->mutex); 2762 2763 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2764 iwl_mvm_has_new_tx_api(mvm)) { 2765 u8 ac = tid_to_mac80211_ac[tid]; 2766 2767 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2768 if (ret) 2769 return ret; 2770 } 2771 2772 spin_lock_bh(&mvmsta->lock); 2773 2774 /* possible race condition - we entered D0i3 while starting agg */ 2775 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2776 spin_unlock_bh(&mvmsta->lock); 2777 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2778 return -EIO; 2779 } 2780 2781 /* 2782 * Note the possible cases: 2783 * 1. An enabled TXQ - TXQ needs to become agg'ed 2784 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2785 * it as reserved 2786 */ 2787 txq_id = mvmsta->tid_data[tid].txq_id; 2788 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2789 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2790 IWL_MVM_DQA_MIN_DATA_QUEUE, 2791 IWL_MVM_DQA_MAX_DATA_QUEUE); 2792 if (ret < 0) { 2793 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2794 goto out; 2795 } 2796 2797 txq_id = ret; 2798 2799 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2800 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2801 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2802 ret = -ENXIO; 2803 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2804 tid, IWL_MAX_HW_QUEUES - 1); 2805 goto out; 2806 2807 } else if (unlikely(mvm->queue_info[txq_id].status == 2808 IWL_MVM_QUEUE_SHARED)) { 2809 ret = -ENXIO; 2810 IWL_DEBUG_TX_QUEUES(mvm, 2811 "Can't start tid %d agg on shared queue!\n", 2812 tid); 2813 goto out; 2814 } 2815 2816 IWL_DEBUG_TX_QUEUES(mvm, 2817 "AGG for tid %d will be on queue #%d\n", 2818 tid, txq_id); 2819 2820 tid_data = &mvmsta->tid_data[tid]; 2821 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2822 tid_data->txq_id = txq_id; 2823 *ssn = tid_data->ssn; 2824 2825 IWL_DEBUG_TX_QUEUES(mvm, 2826 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2827 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2828 tid_data->next_reclaimed); 2829 2830 /* 2831 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2832 * to align the wrap around of ssn so we compare relevant values. 2833 */ 2834 normalized_ssn = tid_data->ssn; 2835 if (mvm->trans->cfg->gen2) 2836 normalized_ssn &= 0xff; 2837 2838 if (normalized_ssn == tid_data->next_reclaimed) { 2839 tid_data->state = IWL_AGG_STARTING; 2840 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2841 } else { 2842 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2843 } 2844 2845 ret = 0; 2846 2847 out: 2848 spin_unlock_bh(&mvmsta->lock); 2849 2850 return ret; 2851 } 2852 2853 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2854 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2855 bool amsdu) 2856 { 2857 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2858 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2859 unsigned int wdg_timeout = 2860 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2861 int queue, ret; 2862 bool alloc_queue = true; 2863 enum iwl_mvm_queue_status queue_status; 2864 u16 ssn; 2865 2866 struct iwl_trans_txq_scd_cfg cfg = { 2867 .sta_id = mvmsta->sta_id, 2868 .tid = tid, 2869 .frame_limit = buf_size, 2870 .aggregate = true, 2871 }; 2872 2873 /* 2874 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2875 * manager, so this function should never be called in this case. 2876 */ 2877 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2878 return -EINVAL; 2879 2880 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2881 != IWL_MAX_TID_COUNT); 2882 2883 spin_lock_bh(&mvmsta->lock); 2884 ssn = tid_data->ssn; 2885 queue = tid_data->txq_id; 2886 tid_data->state = IWL_AGG_ON; 2887 mvmsta->agg_tids |= BIT(tid); 2888 tid_data->ssn = 0xffff; 2889 tid_data->amsdu_in_ampdu_allowed = amsdu; 2890 spin_unlock_bh(&mvmsta->lock); 2891 2892 if (iwl_mvm_has_new_tx_api(mvm)) { 2893 /* 2894 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2895 * would have failed, so if we are here there is no need to 2896 * allocate a queue. 2897 * However, if aggregation size is different than the default 2898 * size, the scheduler should be reconfigured. 2899 * We cannot do this with the new TX API, so return unsupported 2900 * for now, until it will be offloaded to firmware.. 2901 * Note that if SCD default value changes - this condition 2902 * should be updated as well. 2903 */ 2904 if (buf_size < IWL_FRAME_LIMIT) 2905 return -ENOTSUPP; 2906 2907 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2908 if (ret) 2909 return -EIO; 2910 goto out; 2911 } 2912 2913 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2914 2915 queue_status = mvm->queue_info[queue].status; 2916 2917 /* Maybe there is no need to even alloc a queue... */ 2918 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2919 alloc_queue = false; 2920 2921 /* 2922 * Only reconfig the SCD for the queue if the window size has 2923 * changed from current (become smaller) 2924 */ 2925 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2926 /* 2927 * If reconfiguring an existing queue, it first must be 2928 * drained 2929 */ 2930 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2931 BIT(queue)); 2932 if (ret) { 2933 IWL_ERR(mvm, 2934 "Error draining queue before reconfig\n"); 2935 return ret; 2936 } 2937 2938 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2939 mvmsta->sta_id, tid, 2940 buf_size, ssn); 2941 if (ret) { 2942 IWL_ERR(mvm, 2943 "Error reconfiguring TXQ #%d\n", queue); 2944 return ret; 2945 } 2946 } 2947 2948 if (alloc_queue) 2949 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2950 &cfg, wdg_timeout); 2951 2952 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2953 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2954 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2955 if (ret) 2956 return -EIO; 2957 } 2958 2959 /* No need to mark as reserved */ 2960 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2961 2962 out: 2963 /* 2964 * Even though in theory the peer could have different 2965 * aggregation reorder buffer sizes for different sessions, 2966 * our ucode doesn't allow for that and has a global limit 2967 * for each station. Therefore, use the minimum of all the 2968 * aggregation sessions and our default value. 2969 */ 2970 mvmsta->max_agg_bufsize = 2971 min(mvmsta->max_agg_bufsize, buf_size); 2972 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2973 2974 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2975 sta->addr, tid); 2976 2977 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 2978 } 2979 2980 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2981 struct iwl_mvm_sta *mvmsta, 2982 struct iwl_mvm_tid_data *tid_data) 2983 { 2984 u16 txq_id = tid_data->txq_id; 2985 2986 lockdep_assert_held(&mvm->mutex); 2987 2988 if (iwl_mvm_has_new_tx_api(mvm)) 2989 return; 2990 2991 /* 2992 * The TXQ is marked as reserved only if no traffic came through yet 2993 * This means no traffic has been sent on this TID (agg'd or not), so 2994 * we no longer have use for the queue. Since it hasn't even been 2995 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2996 * free. 2997 */ 2998 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 2999 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3000 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3001 } 3002 } 3003 3004 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3005 struct ieee80211_sta *sta, u16 tid) 3006 { 3007 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3008 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3009 u16 txq_id; 3010 int err; 3011 3012 /* 3013 * If mac80211 is cleaning its state, then say that we finished since 3014 * our state has been cleared anyway. 3015 */ 3016 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3017 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3018 return 0; 3019 } 3020 3021 spin_lock_bh(&mvmsta->lock); 3022 3023 txq_id = tid_data->txq_id; 3024 3025 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3026 mvmsta->sta_id, tid, txq_id, tid_data->state); 3027 3028 mvmsta->agg_tids &= ~BIT(tid); 3029 3030 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3031 3032 switch (tid_data->state) { 3033 case IWL_AGG_ON: 3034 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3035 3036 IWL_DEBUG_TX_QUEUES(mvm, 3037 "ssn = %d, next_recl = %d\n", 3038 tid_data->ssn, tid_data->next_reclaimed); 3039 3040 tid_data->ssn = 0xffff; 3041 tid_data->state = IWL_AGG_OFF; 3042 spin_unlock_bh(&mvmsta->lock); 3043 3044 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3045 3046 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3047 return 0; 3048 case IWL_AGG_STARTING: 3049 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3050 /* 3051 * The agg session has been stopped before it was set up. This 3052 * can happen when the AddBA timer times out for example. 3053 */ 3054 3055 /* No barriers since we are under mutex */ 3056 lockdep_assert_held(&mvm->mutex); 3057 3058 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3059 tid_data->state = IWL_AGG_OFF; 3060 err = 0; 3061 break; 3062 default: 3063 IWL_ERR(mvm, 3064 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3065 mvmsta->sta_id, tid, tid_data->state); 3066 IWL_ERR(mvm, 3067 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3068 err = -EINVAL; 3069 } 3070 3071 spin_unlock_bh(&mvmsta->lock); 3072 3073 return err; 3074 } 3075 3076 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3077 struct ieee80211_sta *sta, u16 tid) 3078 { 3079 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3080 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3081 u16 txq_id; 3082 enum iwl_mvm_agg_state old_state; 3083 3084 /* 3085 * First set the agg state to OFF to avoid calling 3086 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3087 */ 3088 spin_lock_bh(&mvmsta->lock); 3089 txq_id = tid_data->txq_id; 3090 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3091 mvmsta->sta_id, tid, txq_id, tid_data->state); 3092 old_state = tid_data->state; 3093 tid_data->state = IWL_AGG_OFF; 3094 mvmsta->agg_tids &= ~BIT(tid); 3095 spin_unlock_bh(&mvmsta->lock); 3096 3097 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3098 3099 if (old_state >= IWL_AGG_ON) { 3100 iwl_mvm_drain_sta(mvm, mvmsta, true); 3101 3102 if (iwl_mvm_has_new_tx_api(mvm)) { 3103 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3104 BIT(tid), 0)) 3105 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3106 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3107 } else { 3108 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3109 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3110 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3111 } 3112 3113 iwl_mvm_drain_sta(mvm, mvmsta, false); 3114 3115 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3116 } 3117 3118 return 0; 3119 } 3120 3121 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3122 { 3123 int i, max = -1, max_offs = -1; 3124 3125 lockdep_assert_held(&mvm->mutex); 3126 3127 /* Pick the unused key offset with the highest 'deleted' 3128 * counter. Every time a key is deleted, all the counters 3129 * are incremented and the one that was just deleted is 3130 * reset to zero. Thus, the highest counter is the one 3131 * that was deleted longest ago. Pick that one. 3132 */ 3133 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3134 if (test_bit(i, mvm->fw_key_table)) 3135 continue; 3136 if (mvm->fw_key_deleted[i] > max) { 3137 max = mvm->fw_key_deleted[i]; 3138 max_offs = i; 3139 } 3140 } 3141 3142 if (max_offs < 0) 3143 return STA_KEY_IDX_INVALID; 3144 3145 return max_offs; 3146 } 3147 3148 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3149 struct ieee80211_vif *vif, 3150 struct ieee80211_sta *sta) 3151 { 3152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3153 3154 if (sta) 3155 return iwl_mvm_sta_from_mac80211(sta); 3156 3157 /* 3158 * The device expects GTKs for station interfaces to be 3159 * installed as GTKs for the AP station. If we have no 3160 * station ID, then use AP's station ID. 3161 */ 3162 if (vif->type == NL80211_IFTYPE_STATION && 3163 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3164 u8 sta_id = mvmvif->ap_sta_id; 3165 3166 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3167 lockdep_is_held(&mvm->mutex)); 3168 3169 /* 3170 * It is possible that the 'sta' parameter is NULL, 3171 * for example when a GTK is removed - the sta_id will then 3172 * be the AP ID, and no station was passed by mac80211. 3173 */ 3174 if (IS_ERR_OR_NULL(sta)) 3175 return NULL; 3176 3177 return iwl_mvm_sta_from_mac80211(sta); 3178 } 3179 3180 return NULL; 3181 } 3182 3183 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3184 u32 sta_id, 3185 struct ieee80211_key_conf *key, bool mcast, 3186 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3187 u8 key_offset, bool mfp) 3188 { 3189 union { 3190 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3191 struct iwl_mvm_add_sta_key_cmd cmd; 3192 } u = {}; 3193 __le16 key_flags; 3194 int ret; 3195 u32 status; 3196 u16 keyidx; 3197 u64 pn = 0; 3198 int i, size; 3199 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3200 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3201 3202 if (sta_id == IWL_MVM_INVALID_STA) 3203 return -EINVAL; 3204 3205 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3206 STA_KEY_FLG_KEYID_MSK; 3207 key_flags = cpu_to_le16(keyidx); 3208 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3209 3210 switch (key->cipher) { 3211 case WLAN_CIPHER_SUITE_TKIP: 3212 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3213 if (new_api) { 3214 memcpy((void *)&u.cmd.tx_mic_key, 3215 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3216 IWL_MIC_KEY_SIZE); 3217 3218 memcpy((void *)&u.cmd.rx_mic_key, 3219 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3220 IWL_MIC_KEY_SIZE); 3221 pn = atomic64_read(&key->tx_pn); 3222 3223 } else { 3224 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3225 for (i = 0; i < 5; i++) 3226 u.cmd_v1.tkip_rx_ttak[i] = 3227 cpu_to_le16(tkip_p1k[i]); 3228 } 3229 memcpy(u.cmd.common.key, key->key, key->keylen); 3230 break; 3231 case WLAN_CIPHER_SUITE_CCMP: 3232 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3233 memcpy(u.cmd.common.key, key->key, key->keylen); 3234 if (new_api) 3235 pn = atomic64_read(&key->tx_pn); 3236 break; 3237 case WLAN_CIPHER_SUITE_WEP104: 3238 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3239 /* fall through */ 3240 case WLAN_CIPHER_SUITE_WEP40: 3241 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3242 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3243 break; 3244 case WLAN_CIPHER_SUITE_GCMP_256: 3245 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3246 /* fall through */ 3247 case WLAN_CIPHER_SUITE_GCMP: 3248 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3249 memcpy(u.cmd.common.key, key->key, key->keylen); 3250 if (new_api) 3251 pn = atomic64_read(&key->tx_pn); 3252 break; 3253 default: 3254 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3255 memcpy(u.cmd.common.key, key->key, key->keylen); 3256 } 3257 3258 if (mcast) 3259 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3260 if (mfp) 3261 key_flags |= cpu_to_le16(STA_KEY_MFP); 3262 3263 u.cmd.common.key_offset = key_offset; 3264 u.cmd.common.key_flags = key_flags; 3265 u.cmd.common.sta_id = sta_id; 3266 3267 if (new_api) { 3268 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3269 size = sizeof(u.cmd); 3270 } else { 3271 size = sizeof(u.cmd_v1); 3272 } 3273 3274 status = ADD_STA_SUCCESS; 3275 if (cmd_flags & CMD_ASYNC) 3276 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3277 &u.cmd); 3278 else 3279 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3280 &u.cmd, &status); 3281 3282 switch (status) { 3283 case ADD_STA_SUCCESS: 3284 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3285 break; 3286 default: 3287 ret = -EIO; 3288 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3289 break; 3290 } 3291 3292 return ret; 3293 } 3294 3295 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3296 struct ieee80211_key_conf *keyconf, 3297 u8 sta_id, bool remove_key) 3298 { 3299 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3300 3301 /* verify the key details match the required command's expectations */ 3302 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3303 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3304 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3305 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3306 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3307 return -EINVAL; 3308 3309 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3310 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3311 return -EINVAL; 3312 3313 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3314 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3315 3316 if (remove_key) { 3317 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3318 } else { 3319 struct ieee80211_key_seq seq; 3320 const u8 *pn; 3321 3322 switch (keyconf->cipher) { 3323 case WLAN_CIPHER_SUITE_AES_CMAC: 3324 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3325 break; 3326 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3327 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3328 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3329 break; 3330 default: 3331 return -EINVAL; 3332 } 3333 3334 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3335 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3336 igtk_cmd.ctrl_flags |= 3337 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3338 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3339 pn = seq.aes_cmac.pn; 3340 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3341 ((u64) pn[4] << 8) | 3342 ((u64) pn[3] << 16) | 3343 ((u64) pn[2] << 24) | 3344 ((u64) pn[1] << 32) | 3345 ((u64) pn[0] << 40)); 3346 } 3347 3348 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3349 remove_key ? "removing" : "installing", 3350 igtk_cmd.sta_id); 3351 3352 if (!iwl_mvm_has_new_rx_api(mvm)) { 3353 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3354 .ctrl_flags = igtk_cmd.ctrl_flags, 3355 .key_id = igtk_cmd.key_id, 3356 .sta_id = igtk_cmd.sta_id, 3357 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3358 }; 3359 3360 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3361 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3362 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3363 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3364 } 3365 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3366 sizeof(igtk_cmd), &igtk_cmd); 3367 } 3368 3369 3370 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3371 struct ieee80211_vif *vif, 3372 struct ieee80211_sta *sta) 3373 { 3374 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3375 3376 if (sta) 3377 return sta->addr; 3378 3379 if (vif->type == NL80211_IFTYPE_STATION && 3380 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3381 u8 sta_id = mvmvif->ap_sta_id; 3382 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3383 lockdep_is_held(&mvm->mutex)); 3384 return sta->addr; 3385 } 3386 3387 3388 return NULL; 3389 } 3390 3391 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3392 struct ieee80211_vif *vif, 3393 struct ieee80211_sta *sta, 3394 struct ieee80211_key_conf *keyconf, 3395 u8 key_offset, 3396 bool mcast) 3397 { 3398 int ret; 3399 const u8 *addr; 3400 struct ieee80211_key_seq seq; 3401 u16 p1k[5]; 3402 u32 sta_id; 3403 bool mfp = false; 3404 3405 if (sta) { 3406 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3407 3408 sta_id = mvm_sta->sta_id; 3409 mfp = sta->mfp; 3410 } else if (vif->type == NL80211_IFTYPE_AP && 3411 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3412 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3413 3414 sta_id = mvmvif->mcast_sta.sta_id; 3415 } else { 3416 IWL_ERR(mvm, "Failed to find station id\n"); 3417 return -EINVAL; 3418 } 3419 3420 switch (keyconf->cipher) { 3421 case WLAN_CIPHER_SUITE_TKIP: 3422 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3423 /* get phase 1 key from mac80211 */ 3424 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3425 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3426 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3427 seq.tkip.iv32, p1k, 0, key_offset, 3428 mfp); 3429 break; 3430 case WLAN_CIPHER_SUITE_CCMP: 3431 case WLAN_CIPHER_SUITE_WEP40: 3432 case WLAN_CIPHER_SUITE_WEP104: 3433 case WLAN_CIPHER_SUITE_GCMP: 3434 case WLAN_CIPHER_SUITE_GCMP_256: 3435 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3436 0, NULL, 0, key_offset, mfp); 3437 break; 3438 default: 3439 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3440 0, NULL, 0, key_offset, mfp); 3441 } 3442 3443 return ret; 3444 } 3445 3446 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3447 struct ieee80211_vif *vif, 3448 struct ieee80211_sta *sta, 3449 struct ieee80211_key_conf *keyconf, 3450 u8 key_offset) 3451 { 3452 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3453 struct iwl_mvm_sta *mvm_sta; 3454 u8 sta_id = IWL_MVM_INVALID_STA; 3455 int ret; 3456 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3457 3458 lockdep_assert_held(&mvm->mutex); 3459 3460 if (vif->type != NL80211_IFTYPE_AP || 3461 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3462 /* Get the station id from the mvm local station table */ 3463 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3464 if (!mvm_sta) { 3465 IWL_ERR(mvm, "Failed to find station\n"); 3466 return -EINVAL; 3467 } 3468 sta_id = mvm_sta->sta_id; 3469 3470 /* 3471 * It is possible that the 'sta' parameter is NULL, and thus 3472 * there is a need to retrieve the sta from the local station 3473 * table. 3474 */ 3475 if (!sta) { 3476 sta = rcu_dereference_protected( 3477 mvm->fw_id_to_mac_id[sta_id], 3478 lockdep_is_held(&mvm->mutex)); 3479 if (IS_ERR_OR_NULL(sta)) { 3480 IWL_ERR(mvm, "Invalid station id\n"); 3481 return -EINVAL; 3482 } 3483 } 3484 3485 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3486 return -EINVAL; 3487 } else { 3488 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3489 3490 sta_id = mvmvif->mcast_sta.sta_id; 3491 } 3492 3493 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3494 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3495 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3496 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3497 goto end; 3498 } 3499 3500 /* If the key_offset is not pre-assigned, we need to find a 3501 * new offset to use. In normal cases, the offset is not 3502 * pre-assigned, but during HW_RESTART we want to reuse the 3503 * same indices, so we pass them when this function is called. 3504 * 3505 * In D3 entry, we need to hardcoded the indices (because the 3506 * firmware hardcodes the PTK offset to 0). In this case, we 3507 * need to make sure we don't overwrite the hw_key_idx in the 3508 * keyconf structure, because otherwise we cannot configure 3509 * the original ones back when resuming. 3510 */ 3511 if (key_offset == STA_KEY_IDX_INVALID) { 3512 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3513 if (key_offset == STA_KEY_IDX_INVALID) 3514 return -ENOSPC; 3515 keyconf->hw_key_idx = key_offset; 3516 } 3517 3518 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3519 if (ret) 3520 goto end; 3521 3522 /* 3523 * For WEP, the same key is used for multicast and unicast. Upload it 3524 * again, using the same key offset, and now pointing the other one 3525 * to the same key slot (offset). 3526 * If this fails, remove the original as well. 3527 */ 3528 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3529 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3530 sta) { 3531 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3532 key_offset, !mcast); 3533 if (ret) { 3534 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3535 goto end; 3536 } 3537 } 3538 3539 __set_bit(key_offset, mvm->fw_key_table); 3540 3541 end: 3542 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3543 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3544 sta ? sta->addr : zero_addr, ret); 3545 return ret; 3546 } 3547 3548 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3549 struct ieee80211_vif *vif, 3550 struct ieee80211_sta *sta, 3551 struct ieee80211_key_conf *keyconf) 3552 { 3553 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3554 struct iwl_mvm_sta *mvm_sta; 3555 u8 sta_id = IWL_MVM_INVALID_STA; 3556 int ret, i; 3557 3558 lockdep_assert_held(&mvm->mutex); 3559 3560 /* Get the station from the mvm local station table */ 3561 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3562 if (mvm_sta) 3563 sta_id = mvm_sta->sta_id; 3564 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3565 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3566 3567 3568 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3569 keyconf->keyidx, sta_id); 3570 3571 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3572 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3573 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3574 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3575 3576 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3577 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3578 keyconf->hw_key_idx); 3579 return -ENOENT; 3580 } 3581 3582 /* track which key was deleted last */ 3583 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3584 if (mvm->fw_key_deleted[i] < U8_MAX) 3585 mvm->fw_key_deleted[i]++; 3586 } 3587 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3588 3589 if (sta && !mvm_sta) { 3590 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3591 return 0; 3592 } 3593 3594 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3595 if (ret) 3596 return ret; 3597 3598 /* delete WEP key twice to get rid of (now useless) offset */ 3599 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3600 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3601 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3602 3603 return ret; 3604 } 3605 3606 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3607 struct ieee80211_vif *vif, 3608 struct ieee80211_key_conf *keyconf, 3609 struct ieee80211_sta *sta, u32 iv32, 3610 u16 *phase1key) 3611 { 3612 struct iwl_mvm_sta *mvm_sta; 3613 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3614 bool mfp = sta ? sta->mfp : false; 3615 3616 rcu_read_lock(); 3617 3618 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3619 if (WARN_ON_ONCE(!mvm_sta)) 3620 goto unlock; 3621 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3622 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3623 mfp); 3624 3625 unlock: 3626 rcu_read_unlock(); 3627 } 3628 3629 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3630 struct ieee80211_sta *sta) 3631 { 3632 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3633 struct iwl_mvm_add_sta_cmd cmd = { 3634 .add_modify = STA_MODE_MODIFY, 3635 .sta_id = mvmsta->sta_id, 3636 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3637 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3638 }; 3639 int ret; 3640 3641 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3642 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3643 if (ret) 3644 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3645 } 3646 3647 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3648 struct ieee80211_sta *sta, 3649 enum ieee80211_frame_release_type reason, 3650 u16 cnt, u16 tids, bool more_data, 3651 bool single_sta_queue) 3652 { 3653 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3654 struct iwl_mvm_add_sta_cmd cmd = { 3655 .add_modify = STA_MODE_MODIFY, 3656 .sta_id = mvmsta->sta_id, 3657 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3658 .sleep_tx_count = cpu_to_le16(cnt), 3659 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3660 }; 3661 int tid, ret; 3662 unsigned long _tids = tids; 3663 3664 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3665 * Note that this field is reserved and unused by firmware not 3666 * supporting GO uAPSD, so it's safe to always do this. 3667 */ 3668 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3669 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3670 3671 /* If we're releasing frames from aggregation or dqa queues then check 3672 * if all the queues that we're releasing frames from, combined, have: 3673 * - more frames than the service period, in which case more_data 3674 * needs to be set 3675 * - fewer than 'cnt' frames, in which case we need to adjust the 3676 * firmware command (but do that unconditionally) 3677 */ 3678 if (single_sta_queue) { 3679 int remaining = cnt; 3680 int sleep_tx_count; 3681 3682 spin_lock_bh(&mvmsta->lock); 3683 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3684 struct iwl_mvm_tid_data *tid_data; 3685 u16 n_queued; 3686 3687 tid_data = &mvmsta->tid_data[tid]; 3688 3689 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3690 if (n_queued > remaining) { 3691 more_data = true; 3692 remaining = 0; 3693 break; 3694 } 3695 remaining -= n_queued; 3696 } 3697 sleep_tx_count = cnt - remaining; 3698 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3699 mvmsta->sleep_tx_count = sleep_tx_count; 3700 spin_unlock_bh(&mvmsta->lock); 3701 3702 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3703 if (WARN_ON(cnt - remaining == 0)) { 3704 ieee80211_sta_eosp(sta); 3705 return; 3706 } 3707 } 3708 3709 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3710 if (more_data) 3711 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3712 3713 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3714 mvmsta->next_status_eosp = true; 3715 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3716 } else { 3717 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3718 } 3719 3720 /* block the Tx queues until the FW updated the sleep Tx count */ 3721 iwl_trans_block_txq_ptrs(mvm->trans, true); 3722 3723 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3724 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3725 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3726 if (ret) 3727 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3728 } 3729 3730 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3731 struct iwl_rx_cmd_buffer *rxb) 3732 { 3733 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3734 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3735 struct ieee80211_sta *sta; 3736 u32 sta_id = le32_to_cpu(notif->sta_id); 3737 3738 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3739 return; 3740 3741 rcu_read_lock(); 3742 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3743 if (!IS_ERR_OR_NULL(sta)) 3744 ieee80211_sta_eosp(sta); 3745 rcu_read_unlock(); 3746 } 3747 3748 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3749 struct iwl_mvm_sta *mvmsta, bool disable) 3750 { 3751 struct iwl_mvm_add_sta_cmd cmd = { 3752 .add_modify = STA_MODE_MODIFY, 3753 .sta_id = mvmsta->sta_id, 3754 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3755 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3756 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3757 }; 3758 int ret; 3759 3760 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3761 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3762 if (ret) 3763 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3764 } 3765 3766 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3767 struct ieee80211_sta *sta, 3768 bool disable) 3769 { 3770 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3771 3772 spin_lock_bh(&mvm_sta->lock); 3773 3774 if (mvm_sta->disable_tx == disable) { 3775 spin_unlock_bh(&mvm_sta->lock); 3776 return; 3777 } 3778 3779 mvm_sta->disable_tx = disable; 3780 3781 /* Tell mac80211 to start/stop queuing tx for this station */ 3782 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3783 3784 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3785 3786 spin_unlock_bh(&mvm_sta->lock); 3787 } 3788 3789 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3790 struct iwl_mvm_vif *mvmvif, 3791 struct iwl_mvm_int_sta *sta, 3792 bool disable) 3793 { 3794 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3795 struct iwl_mvm_add_sta_cmd cmd = { 3796 .add_modify = STA_MODE_MODIFY, 3797 .sta_id = sta->sta_id, 3798 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3799 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3800 .mac_id_n_color = cpu_to_le32(id), 3801 }; 3802 int ret; 3803 3804 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3805 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3806 if (ret) 3807 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3808 } 3809 3810 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3811 struct iwl_mvm_vif *mvmvif, 3812 bool disable) 3813 { 3814 struct ieee80211_sta *sta; 3815 struct iwl_mvm_sta *mvm_sta; 3816 int i; 3817 3818 lockdep_assert_held(&mvm->mutex); 3819 3820 /* Block/unblock all the stations of the given mvmvif */ 3821 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3822 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3823 lockdep_is_held(&mvm->mutex)); 3824 if (IS_ERR_OR_NULL(sta)) 3825 continue; 3826 3827 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3828 if (mvm_sta->mac_id_n_color != 3829 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3830 continue; 3831 3832 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3833 } 3834 3835 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3836 return; 3837 3838 /* Need to block/unblock also multicast station */ 3839 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3840 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3841 &mvmvif->mcast_sta, disable); 3842 3843 /* 3844 * Only unblock the broadcast station (FW blocks it for immediate 3845 * quiet, not the driver) 3846 */ 3847 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3848 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3849 &mvmvif->bcast_sta, disable); 3850 } 3851 3852 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3853 { 3854 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3855 struct iwl_mvm_sta *mvmsta; 3856 3857 rcu_read_lock(); 3858 3859 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3860 3861 if (!WARN_ON(!mvmsta)) 3862 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3863 3864 rcu_read_unlock(); 3865 } 3866 3867 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3868 { 3869 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3870 3871 /* 3872 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3873 * to align the wrap around of ssn so we compare relevant values. 3874 */ 3875 if (mvm->trans->cfg->gen2) 3876 sn &= 0xff; 3877 3878 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3879 } 3880