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, 2018 - 2020 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2012 - 2015, 2018 - 2020 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include <net/mac80211.h> 63 64 #include "mvm.h" 65 #include "sta.h" 66 #include "rs.h" 67 68 /* 69 * New version of ADD_STA_sta command added new fields at the end of the 70 * structure, so sending the size of the relevant API's structure is enough to 71 * support both API versions. 72 */ 73 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 74 { 75 if (iwl_mvm_has_new_rx_api(mvm) || 76 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 77 return sizeof(struct iwl_mvm_add_sta_cmd); 78 else 79 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 80 } 81 82 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 83 enum nl80211_iftype iftype) 84 { 85 int sta_id; 86 u32 reserved_ids = 0; 87 88 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 89 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 90 91 lockdep_assert_held(&mvm->mutex); 92 93 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 94 if (iftype != NL80211_IFTYPE_STATION) 95 reserved_ids = BIT(0); 96 97 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 98 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 99 if (BIT(sta_id) & reserved_ids) 100 continue; 101 102 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 103 lockdep_is_held(&mvm->mutex))) 104 return sta_id; 105 } 106 return IWL_MVM_INVALID_STA; 107 } 108 109 /* send station add/update command to firmware */ 110 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 111 bool update, unsigned int flags) 112 { 113 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 114 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 115 .sta_id = mvm_sta->sta_id, 116 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 117 .add_modify = update ? 1 : 0, 118 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 119 STA_FLG_MIMO_EN_MSK | 120 STA_FLG_RTS_MIMO_PROT), 121 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 122 }; 123 int ret; 124 u32 status; 125 u32 agg_size = 0, mpdu_dens = 0; 126 127 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 128 add_sta_cmd.station_type = mvm_sta->sta_type; 129 130 if (!update || (flags & STA_MODIFY_QUEUES)) { 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 133 if (!iwl_mvm_has_new_tx_api(mvm)) { 134 add_sta_cmd.tfd_queue_msk = 135 cpu_to_le32(mvm_sta->tfd_queue_msk); 136 137 if (flags & STA_MODIFY_QUEUES) 138 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 139 } else { 140 WARN_ON(flags & STA_MODIFY_QUEUES); 141 } 142 } 143 144 switch (sta->bandwidth) { 145 case IEEE80211_STA_RX_BW_160: 146 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 147 /* fall through */ 148 case IEEE80211_STA_RX_BW_80: 149 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 150 /* fall through */ 151 case IEEE80211_STA_RX_BW_40: 152 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 153 /* fall through */ 154 case IEEE80211_STA_RX_BW_20: 155 if (sta->ht_cap.ht_supported) 156 add_sta_cmd.station_flags |= 157 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 158 break; 159 } 160 161 switch (sta->rx_nss) { 162 case 1: 163 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 164 break; 165 case 2: 166 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 167 break; 168 case 3 ... 8: 169 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 170 break; 171 } 172 173 switch (sta->smps_mode) { 174 case IEEE80211_SMPS_AUTOMATIC: 175 case IEEE80211_SMPS_NUM_MODES: 176 WARN_ON(1); 177 break; 178 case IEEE80211_SMPS_STATIC: 179 /* override NSS */ 180 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 181 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 182 break; 183 case IEEE80211_SMPS_DYNAMIC: 184 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 185 break; 186 case IEEE80211_SMPS_OFF: 187 /* nothing */ 188 break; 189 } 190 191 if (sta->ht_cap.ht_supported) { 192 add_sta_cmd.station_flags_msk |= 193 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 194 STA_FLG_AGG_MPDU_DENS_MSK); 195 196 mpdu_dens = sta->ht_cap.ampdu_density; 197 } 198 199 if (sta->vht_cap.vht_supported) { 200 agg_size = sta->vht_cap.cap & 201 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 202 agg_size >>= 203 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 204 } else if (sta->ht_cap.ht_supported) { 205 agg_size = sta->ht_cap.ampdu_factor; 206 } 207 208 add_sta_cmd.station_flags |= 209 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 210 add_sta_cmd.station_flags |= 211 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 212 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 213 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 214 215 if (sta->wme) { 216 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 217 218 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 219 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 220 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 221 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 223 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 225 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 226 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 227 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 228 } 229 230 status = ADD_STA_SUCCESS; 231 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 232 iwl_mvm_add_sta_cmd_size(mvm), 233 &add_sta_cmd, &status); 234 if (ret) 235 return ret; 236 237 switch (status & IWL_ADD_STA_STATUS_MASK) { 238 case ADD_STA_SUCCESS: 239 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 240 break; 241 default: 242 ret = -EIO; 243 IWL_ERR(mvm, "ADD_STA failed\n"); 244 break; 245 } 246 247 return ret; 248 } 249 250 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 251 { 252 struct iwl_mvm_baid_data *data = 253 from_timer(data, t, session_timer); 254 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 255 struct iwl_mvm_baid_data *ba_data; 256 struct ieee80211_sta *sta; 257 struct iwl_mvm_sta *mvm_sta; 258 unsigned long timeout; 259 260 rcu_read_lock(); 261 262 ba_data = rcu_dereference(*rcu_ptr); 263 264 if (WARN_ON(!ba_data)) 265 goto unlock; 266 267 if (!ba_data->timeout) 268 goto unlock; 269 270 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 271 if (time_is_after_jiffies(timeout)) { 272 mod_timer(&ba_data->session_timer, timeout); 273 goto unlock; 274 } 275 276 /* Timer expired */ 277 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 278 279 /* 280 * sta should be valid unless the following happens: 281 * The firmware asserts which triggers a reconfig flow, but 282 * the reconfig fails before we set the pointer to sta into 283 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 284 * A-MDPU and hence the timer continues to run. Then, the 285 * timer expires and sta is NULL. 286 */ 287 if (!sta) 288 goto unlock; 289 290 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 291 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 292 sta->addr, ba_data->tid); 293 unlock: 294 rcu_read_unlock(); 295 } 296 297 /* Disable aggregations for a bitmap of TIDs for a given station */ 298 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 299 unsigned long disable_agg_tids, 300 bool remove_queue) 301 { 302 struct iwl_mvm_add_sta_cmd cmd = {}; 303 struct ieee80211_sta *sta; 304 struct iwl_mvm_sta *mvmsta; 305 u32 status; 306 u8 sta_id; 307 308 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 309 return -EINVAL; 310 311 sta_id = mvm->queue_info[queue].ra_sta_id; 312 313 rcu_read_lock(); 314 315 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 316 317 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 318 rcu_read_unlock(); 319 return -EINVAL; 320 } 321 322 mvmsta = iwl_mvm_sta_from_mac80211(sta); 323 324 mvmsta->tid_disable_agg |= disable_agg_tids; 325 326 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 327 cmd.sta_id = mvmsta->sta_id; 328 cmd.add_modify = STA_MODE_MODIFY; 329 cmd.modify_mask = STA_MODIFY_QUEUES; 330 if (disable_agg_tids) 331 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 332 if (remove_queue) 333 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 334 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 335 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 336 337 rcu_read_unlock(); 338 339 /* Notify FW of queue removal from the STA queues */ 340 status = ADD_STA_SUCCESS; 341 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 342 iwl_mvm_add_sta_cmd_size(mvm), 343 &cmd, &status); 344 } 345 346 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 347 int queue, u8 tid, u8 flags) 348 { 349 struct iwl_scd_txq_cfg_cmd cmd = { 350 .scd_queue = queue, 351 .action = SCD_CFG_DISABLE_QUEUE, 352 }; 353 int ret; 354 355 if (iwl_mvm_has_new_tx_api(mvm)) { 356 iwl_trans_txq_free(mvm->trans, queue); 357 358 return 0; 359 } 360 361 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 362 return 0; 363 364 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 365 366 cmd.action = mvm->queue_info[queue].tid_bitmap ? 367 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 368 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 369 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 370 371 IWL_DEBUG_TX_QUEUES(mvm, 372 "Disabling TXQ #%d tids=0x%x\n", 373 queue, 374 mvm->queue_info[queue].tid_bitmap); 375 376 /* If the queue is still enabled - nothing left to do in this func */ 377 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 378 return 0; 379 380 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 381 cmd.tid = mvm->queue_info[queue].txq_tid; 382 383 /* Make sure queue info is correct even though we overwrite it */ 384 WARN(mvm->queue_info[queue].tid_bitmap, 385 "TXQ #%d info out-of-sync - tids=0x%x\n", 386 queue, mvm->queue_info[queue].tid_bitmap); 387 388 /* If we are here - the queue is freed and we can zero out these vals */ 389 mvm->queue_info[queue].tid_bitmap = 0; 390 391 if (sta) { 392 struct iwl_mvm_txq *mvmtxq = 393 iwl_mvm_txq_from_tid(sta, tid); 394 395 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 396 } 397 398 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 399 mvm->queue_info[queue].reserved = false; 400 401 iwl_trans_txq_disable(mvm->trans, queue, false); 402 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 403 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 404 405 if (ret) 406 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 407 queue, ret); 408 return ret; 409 } 410 411 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 412 { 413 struct ieee80211_sta *sta; 414 struct iwl_mvm_sta *mvmsta; 415 unsigned long tid_bitmap; 416 unsigned long agg_tids = 0; 417 u8 sta_id; 418 int tid; 419 420 lockdep_assert_held(&mvm->mutex); 421 422 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 423 return -EINVAL; 424 425 sta_id = mvm->queue_info[queue].ra_sta_id; 426 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 427 428 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 429 lockdep_is_held(&mvm->mutex)); 430 431 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 432 return -EINVAL; 433 434 mvmsta = iwl_mvm_sta_from_mac80211(sta); 435 436 spin_lock_bh(&mvmsta->lock); 437 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 438 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 439 agg_tids |= BIT(tid); 440 } 441 spin_unlock_bh(&mvmsta->lock); 442 443 return agg_tids; 444 } 445 446 /* 447 * Remove a queue from a station's resources. 448 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 449 * doesn't disable the queue 450 */ 451 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 452 { 453 struct ieee80211_sta *sta; 454 struct iwl_mvm_sta *mvmsta; 455 unsigned long tid_bitmap; 456 unsigned long disable_agg_tids = 0; 457 u8 sta_id; 458 int tid; 459 460 lockdep_assert_held(&mvm->mutex); 461 462 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 463 return -EINVAL; 464 465 sta_id = mvm->queue_info[queue].ra_sta_id; 466 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 467 468 rcu_read_lock(); 469 470 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 471 472 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 473 rcu_read_unlock(); 474 return 0; 475 } 476 477 mvmsta = iwl_mvm_sta_from_mac80211(sta); 478 479 spin_lock_bh(&mvmsta->lock); 480 /* Unmap MAC queues and TIDs from this queue */ 481 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 482 struct iwl_mvm_txq *mvmtxq = 483 iwl_mvm_txq_from_tid(sta, tid); 484 485 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 486 disable_agg_tids |= BIT(tid); 487 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 488 489 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 490 } 491 492 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 493 spin_unlock_bh(&mvmsta->lock); 494 495 rcu_read_unlock(); 496 497 /* 498 * The TX path may have been using this TXQ_ID from the tid_data, 499 * so make sure it's no longer running so that we can safely reuse 500 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 501 * above, but nothing guarantees we've stopped using them. Thus, 502 * without this, we could get to iwl_mvm_disable_txq() and remove 503 * the queue while still sending frames to it. 504 */ 505 synchronize_net(); 506 507 return disable_agg_tids; 508 } 509 510 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 511 struct ieee80211_sta *old_sta, 512 u8 new_sta_id) 513 { 514 struct iwl_mvm_sta *mvmsta; 515 u8 sta_id, tid; 516 unsigned long disable_agg_tids = 0; 517 bool same_sta; 518 int ret; 519 520 lockdep_assert_held(&mvm->mutex); 521 522 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 523 return -EINVAL; 524 525 sta_id = mvm->queue_info[queue].ra_sta_id; 526 tid = mvm->queue_info[queue].txq_tid; 527 528 same_sta = sta_id == new_sta_id; 529 530 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 531 if (WARN_ON(!mvmsta)) 532 return -EINVAL; 533 534 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 535 /* Disable the queue */ 536 if (disable_agg_tids) 537 iwl_mvm_invalidate_sta_queue(mvm, queue, 538 disable_agg_tids, false); 539 540 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 541 if (ret) { 542 IWL_ERR(mvm, 543 "Failed to free inactive queue %d (ret=%d)\n", 544 queue, ret); 545 546 return ret; 547 } 548 549 /* If TXQ is allocated to another STA, update removal in FW */ 550 if (!same_sta) 551 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 552 553 return 0; 554 } 555 556 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 557 unsigned long tfd_queue_mask, u8 ac) 558 { 559 int queue = 0; 560 u8 ac_to_queue[IEEE80211_NUM_ACS]; 561 int i; 562 563 /* 564 * This protects us against grabbing a queue that's being reconfigured 565 * by the inactivity checker. 566 */ 567 lockdep_assert_held(&mvm->mutex); 568 569 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 570 return -EINVAL; 571 572 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 573 574 /* See what ACs the existing queues for this STA have */ 575 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 576 /* Only DATA queues can be shared */ 577 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 578 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 579 continue; 580 581 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 582 } 583 584 /* 585 * The queue to share is chosen only from DATA queues as follows (in 586 * descending priority): 587 * 1. An AC_BE queue 588 * 2. Same AC queue 589 * 3. Highest AC queue that is lower than new AC 590 * 4. Any existing AC (there always is at least 1 DATA queue) 591 */ 592 593 /* Priority 1: An AC_BE queue */ 594 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 595 queue = ac_to_queue[IEEE80211_AC_BE]; 596 /* Priority 2: Same AC queue */ 597 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 598 queue = ac_to_queue[ac]; 599 /* Priority 3a: If new AC is VO and VI exists - use VI */ 600 else if (ac == IEEE80211_AC_VO && 601 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 602 queue = ac_to_queue[IEEE80211_AC_VI]; 603 /* Priority 3b: No BE so only AC less than the new one is BK */ 604 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 605 queue = ac_to_queue[IEEE80211_AC_BK]; 606 /* Priority 4a: No BE nor BK - use VI if exists */ 607 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 608 queue = ac_to_queue[IEEE80211_AC_VI]; 609 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 610 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 611 queue = ac_to_queue[IEEE80211_AC_VO]; 612 613 /* Make sure queue found (or not) is legal */ 614 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 615 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 616 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 617 IWL_ERR(mvm, "No DATA queues available to share\n"); 618 return -ENOSPC; 619 } 620 621 return queue; 622 } 623 624 /* 625 * If a given queue has a higher AC than the TID stream that is being compared 626 * to, the queue needs to be redirected to the lower AC. This function does that 627 * in such a case, otherwise - if no redirection required - it does nothing, 628 * unless the %force param is true. 629 */ 630 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 631 int ac, int ssn, unsigned int wdg_timeout, 632 bool force, struct iwl_mvm_txq *txq) 633 { 634 struct iwl_scd_txq_cfg_cmd cmd = { 635 .scd_queue = queue, 636 .action = SCD_CFG_DISABLE_QUEUE, 637 }; 638 bool shared_queue; 639 int ret; 640 641 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 642 return -EINVAL; 643 644 /* 645 * If the AC is lower than current one - FIFO needs to be redirected to 646 * the lowest one of the streams in the queue. Check if this is needed 647 * here. 648 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 649 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 650 * we need to check if the numerical value of X is LARGER than of Y. 651 */ 652 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 653 IWL_DEBUG_TX_QUEUES(mvm, 654 "No redirection needed on TXQ #%d\n", 655 queue); 656 return 0; 657 } 658 659 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 660 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 661 cmd.tid = mvm->queue_info[queue].txq_tid; 662 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 663 664 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 665 queue, iwl_mvm_ac_to_tx_fifo[ac]); 666 667 /* Stop the queue and wait for it to empty */ 668 txq->stopped = true; 669 670 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 671 if (ret) { 672 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 673 queue); 674 ret = -EIO; 675 goto out; 676 } 677 678 /* Before redirecting the queue we need to de-activate it */ 679 iwl_trans_txq_disable(mvm->trans, queue, false); 680 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 681 if (ret) 682 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 683 ret); 684 685 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 686 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 687 688 /* Update the TID "owner" of the queue */ 689 mvm->queue_info[queue].txq_tid = tid; 690 691 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 692 693 /* Redirect to lower AC */ 694 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 695 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 696 697 /* Update AC marking of the queue */ 698 mvm->queue_info[queue].mac80211_ac = ac; 699 700 /* 701 * Mark queue as shared in transport if shared 702 * Note this has to be done after queue enablement because enablement 703 * can also set this value, and there is no indication there to shared 704 * queues 705 */ 706 if (shared_queue) 707 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 708 709 out: 710 /* Continue using the queue */ 711 txq->stopped = false; 712 713 return ret; 714 } 715 716 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 717 u8 minq, u8 maxq) 718 { 719 int i; 720 721 lockdep_assert_held(&mvm->mutex); 722 723 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues, 724 "max queue %d >= num_of_queues (%d)", maxq, 725 mvm->trans->trans_cfg->base_params->num_of_queues)) 726 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1; 727 728 /* This should not be hit with new TX path */ 729 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 730 return -ENOSPC; 731 732 /* Start by looking for a free queue */ 733 for (i = minq; i <= maxq; i++) 734 if (mvm->queue_info[i].tid_bitmap == 0 && 735 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 736 return i; 737 738 return -ENOSPC; 739 } 740 741 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 742 u8 sta_id, u8 tid, unsigned int timeout) 743 { 744 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE, 745 mvm->trans->cfg->min_256_ba_txq_size); 746 747 if (tid == IWL_MAX_TID_COUNT) { 748 tid = IWL_MGMT_TID; 749 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 750 mvm->trans->cfg->min_txq_size); 751 } 752 753 do { 754 __le16 enable = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE); 755 756 queue = iwl_trans_txq_alloc(mvm->trans, enable, 757 sta_id, tid, SCD_QUEUE_CFG, 758 size, timeout); 759 760 if (queue < 0) 761 IWL_DEBUG_TX_QUEUES(mvm, 762 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n", 763 size, sta_id, tid, queue); 764 size /= 2; 765 } while (queue < 0 && size >= 16); 766 767 if (queue < 0) 768 return queue; 769 770 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 771 queue, sta_id, tid); 772 773 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue); 774 775 return queue; 776 } 777 778 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 779 struct ieee80211_sta *sta, u8 ac, 780 int tid) 781 { 782 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 783 struct iwl_mvm_txq *mvmtxq = 784 iwl_mvm_txq_from_tid(sta, tid); 785 unsigned int wdg_timeout = 786 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 787 int queue = -1; 788 789 lockdep_assert_held(&mvm->mutex); 790 791 IWL_DEBUG_TX_QUEUES(mvm, 792 "Allocating queue for sta %d on tid %d\n", 793 mvmsta->sta_id, tid); 794 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 795 if (queue < 0) 796 return queue; 797 798 mvmtxq->txq_id = queue; 799 mvm->tvqm_info[queue].txq_tid = tid; 800 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 801 802 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 803 804 spin_lock_bh(&mvmsta->lock); 805 mvmsta->tid_data[tid].txq_id = queue; 806 spin_unlock_bh(&mvmsta->lock); 807 808 return 0; 809 } 810 811 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 812 struct ieee80211_sta *sta, 813 int queue, u8 sta_id, u8 tid) 814 { 815 bool enable_queue = true; 816 817 /* Make sure this TID isn't already enabled */ 818 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 819 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 820 queue, tid); 821 return false; 822 } 823 824 /* Update mappings and refcounts */ 825 if (mvm->queue_info[queue].tid_bitmap) 826 enable_queue = false; 827 828 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 829 mvm->queue_info[queue].ra_sta_id = sta_id; 830 831 if (enable_queue) { 832 if (tid != IWL_MAX_TID_COUNT) 833 mvm->queue_info[queue].mac80211_ac = 834 tid_to_mac80211_ac[tid]; 835 else 836 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 837 838 mvm->queue_info[queue].txq_tid = tid; 839 } 840 841 if (sta) { 842 struct iwl_mvm_txq *mvmtxq = 843 iwl_mvm_txq_from_tid(sta, tid); 844 845 mvmtxq->txq_id = queue; 846 } 847 848 IWL_DEBUG_TX_QUEUES(mvm, 849 "Enabling TXQ #%d tids=0x%x\n", 850 queue, mvm->queue_info[queue].tid_bitmap); 851 852 return enable_queue; 853 } 854 855 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 856 int queue, u16 ssn, 857 const struct iwl_trans_txq_scd_cfg *cfg, 858 unsigned int wdg_timeout) 859 { 860 struct iwl_scd_txq_cfg_cmd cmd = { 861 .scd_queue = queue, 862 .action = SCD_CFG_ENABLE_QUEUE, 863 .window = cfg->frame_limit, 864 .sta_id = cfg->sta_id, 865 .ssn = cpu_to_le16(ssn), 866 .tx_fifo = cfg->fifo, 867 .aggregate = cfg->aggregate, 868 .tid = cfg->tid, 869 }; 870 bool inc_ssn; 871 872 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 873 return false; 874 875 /* Send the enabling command if we need to */ 876 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 877 return false; 878 879 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 880 NULL, wdg_timeout); 881 if (inc_ssn) 882 le16_add_cpu(&cmd.ssn, 1); 883 884 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 885 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 886 887 return inc_ssn; 888 } 889 890 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 891 { 892 struct iwl_scd_txq_cfg_cmd cmd = { 893 .scd_queue = queue, 894 .action = SCD_CFG_UPDATE_QUEUE_TID, 895 }; 896 int tid; 897 unsigned long tid_bitmap; 898 int ret; 899 900 lockdep_assert_held(&mvm->mutex); 901 902 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 903 return; 904 905 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 906 907 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 908 return; 909 910 /* Find any TID for queue */ 911 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 912 cmd.tid = tid; 913 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 914 915 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 916 if (ret) { 917 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 918 queue, ret); 919 return; 920 } 921 922 mvm->queue_info[queue].txq_tid = tid; 923 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 924 queue, tid); 925 } 926 927 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 928 { 929 struct ieee80211_sta *sta; 930 struct iwl_mvm_sta *mvmsta; 931 u8 sta_id; 932 int tid = -1; 933 unsigned long tid_bitmap; 934 unsigned int wdg_timeout; 935 int ssn; 936 int ret = true; 937 938 /* queue sharing is disabled on new TX path */ 939 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 940 return; 941 942 lockdep_assert_held(&mvm->mutex); 943 944 sta_id = mvm->queue_info[queue].ra_sta_id; 945 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 946 947 /* Find TID for queue, and make sure it is the only one on the queue */ 948 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 949 if (tid_bitmap != BIT(tid)) { 950 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 951 queue, tid_bitmap); 952 return; 953 } 954 955 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 956 tid); 957 958 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 959 lockdep_is_held(&mvm->mutex)); 960 961 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 962 return; 963 964 mvmsta = iwl_mvm_sta_from_mac80211(sta); 965 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 966 967 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 968 969 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 970 tid_to_mac80211_ac[tid], ssn, 971 wdg_timeout, true, 972 iwl_mvm_txq_from_tid(sta, tid)); 973 if (ret) { 974 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 975 return; 976 } 977 978 /* If aggs should be turned back on - do it */ 979 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 980 struct iwl_mvm_add_sta_cmd cmd = {0}; 981 982 mvmsta->tid_disable_agg &= ~BIT(tid); 983 984 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 985 cmd.sta_id = mvmsta->sta_id; 986 cmd.add_modify = STA_MODE_MODIFY; 987 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 988 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 989 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 990 991 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 992 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 993 if (!ret) { 994 IWL_DEBUG_TX_QUEUES(mvm, 995 "TXQ #%d is now aggregated again\n", 996 queue); 997 998 /* Mark queue intenally as aggregating again */ 999 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1000 } 1001 } 1002 1003 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1004 } 1005 1006 /* 1007 * Remove inactive TIDs of a given queue. 1008 * If all queue TIDs are inactive - mark the queue as inactive 1009 * If only some the queue TIDs are inactive - unmap them from the queue 1010 * 1011 * Returns %true if all TIDs were removed and the queue could be reused. 1012 */ 1013 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1014 struct iwl_mvm_sta *mvmsta, int queue, 1015 unsigned long tid_bitmap, 1016 unsigned long *unshare_queues, 1017 unsigned long *changetid_queues) 1018 { 1019 int tid; 1020 1021 lockdep_assert_held(&mvmsta->lock); 1022 lockdep_assert_held(&mvm->mutex); 1023 1024 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1025 return false; 1026 1027 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1028 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1029 /* If some TFDs are still queued - don't mark TID as inactive */ 1030 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1031 tid_bitmap &= ~BIT(tid); 1032 1033 /* Don't mark as inactive any TID that has an active BA */ 1034 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1035 tid_bitmap &= ~BIT(tid); 1036 } 1037 1038 /* If all TIDs in the queue are inactive - return it can be reused */ 1039 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1040 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1041 return true; 1042 } 1043 1044 /* 1045 * If we are here, this is a shared queue and not all TIDs timed-out. 1046 * Remove the ones that did. 1047 */ 1048 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1049 u16 tid_bitmap; 1050 1051 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1052 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1053 1054 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1055 1056 /* 1057 * We need to take into account a situation in which a TXQ was 1058 * allocated to TID x, and then turned shared by adding TIDs y 1059 * and z. If TID x becomes inactive and is removed from the TXQ, 1060 * ownership must be given to one of the remaining TIDs. 1061 * This is mainly because if TID x continues - a new queue can't 1062 * be allocated for it as long as it is an owner of another TXQ. 1063 * 1064 * Mark this queue in the right bitmap, we'll send the command 1065 * to the firmware later. 1066 */ 1067 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1068 set_bit(queue, changetid_queues); 1069 1070 IWL_DEBUG_TX_QUEUES(mvm, 1071 "Removing inactive TID %d from shared Q:%d\n", 1072 tid, queue); 1073 } 1074 1075 IWL_DEBUG_TX_QUEUES(mvm, 1076 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1077 mvm->queue_info[queue].tid_bitmap); 1078 1079 /* 1080 * There may be different TIDs with the same mac queues, so make 1081 * sure all TIDs have existing corresponding mac queues enabled 1082 */ 1083 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1084 1085 /* If the queue is marked as shared - "unshare" it */ 1086 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1087 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1088 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1089 queue); 1090 set_bit(queue, unshare_queues); 1091 } 1092 1093 return false; 1094 } 1095 1096 /* 1097 * Check for inactivity - this includes checking if any queue 1098 * can be unshared and finding one (and only one) that can be 1099 * reused. 1100 * This function is also invoked as a sort of clean-up task, 1101 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1102 * 1103 * Returns the queue number, or -ENOSPC. 1104 */ 1105 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1106 { 1107 unsigned long now = jiffies; 1108 unsigned long unshare_queues = 0; 1109 unsigned long changetid_queues = 0; 1110 int i, ret, free_queue = -ENOSPC; 1111 struct ieee80211_sta *queue_owner = NULL; 1112 1113 lockdep_assert_held(&mvm->mutex); 1114 1115 if (iwl_mvm_has_new_tx_api(mvm)) 1116 return -ENOSPC; 1117 1118 rcu_read_lock(); 1119 1120 /* we skip the CMD queue below by starting at 1 */ 1121 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1122 1123 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1124 struct ieee80211_sta *sta; 1125 struct iwl_mvm_sta *mvmsta; 1126 u8 sta_id; 1127 int tid; 1128 unsigned long inactive_tid_bitmap = 0; 1129 unsigned long queue_tid_bitmap; 1130 1131 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1132 if (!queue_tid_bitmap) 1133 continue; 1134 1135 /* If TXQ isn't in active use anyway - nothing to do here... */ 1136 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1137 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1138 continue; 1139 1140 /* Check to see if there are inactive TIDs on this queue */ 1141 for_each_set_bit(tid, &queue_tid_bitmap, 1142 IWL_MAX_TID_COUNT + 1) { 1143 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1144 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1145 continue; 1146 1147 inactive_tid_bitmap |= BIT(tid); 1148 } 1149 1150 /* If all TIDs are active - finish check on this queue */ 1151 if (!inactive_tid_bitmap) 1152 continue; 1153 1154 /* 1155 * If we are here - the queue hadn't been served recently and is 1156 * in use 1157 */ 1158 1159 sta_id = mvm->queue_info[i].ra_sta_id; 1160 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1161 1162 /* 1163 * If the STA doesn't exist anymore, it isn't an error. It could 1164 * be that it was removed since getting the queues, and in this 1165 * case it should've inactivated its queues anyway. 1166 */ 1167 if (IS_ERR_OR_NULL(sta)) 1168 continue; 1169 1170 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1171 1172 spin_lock_bh(&mvmsta->lock); 1173 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1174 inactive_tid_bitmap, 1175 &unshare_queues, 1176 &changetid_queues); 1177 if (ret && free_queue < 0) { 1178 queue_owner = sta; 1179 free_queue = i; 1180 } 1181 /* only unlock sta lock - we still need the queue info lock */ 1182 spin_unlock_bh(&mvmsta->lock); 1183 } 1184 1185 1186 /* Reconfigure queues requiring reconfiguation */ 1187 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1188 iwl_mvm_unshare_queue(mvm, i); 1189 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1190 iwl_mvm_change_queue_tid(mvm, i); 1191 1192 rcu_read_unlock(); 1193 1194 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1195 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1196 alloc_for_sta); 1197 if (ret) 1198 return ret; 1199 } 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 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1371 { 1372 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1373 add_stream_wk); 1374 1375 mutex_lock(&mvm->mutex); 1376 1377 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1378 1379 while (!list_empty(&mvm->add_stream_txqs)) { 1380 struct iwl_mvm_txq *mvmtxq; 1381 struct ieee80211_txq *txq; 1382 u8 tid; 1383 1384 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1385 struct iwl_mvm_txq, list); 1386 1387 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1388 drv_priv); 1389 tid = txq->tid; 1390 if (tid == IEEE80211_NUM_TIDS) 1391 tid = IWL_MAX_TID_COUNT; 1392 1393 /* 1394 * We can't really do much here, but if this fails we can't 1395 * transmit anyway - so just don't transmit the frame etc. 1396 * and let them back up ... we've tried our best to allocate 1397 * a queue in the function itself. 1398 */ 1399 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1400 list_del_init(&mvmtxq->list); 1401 continue; 1402 } 1403 1404 list_del_init(&mvmtxq->list); 1405 local_bh_disable(); 1406 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1407 local_bh_enable(); 1408 } 1409 1410 mutex_unlock(&mvm->mutex); 1411 } 1412 1413 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1414 struct ieee80211_sta *sta, 1415 enum nl80211_iftype vif_type) 1416 { 1417 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1418 int queue; 1419 1420 /* queue reserving is disabled on new TX path */ 1421 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1422 return 0; 1423 1424 /* run the general cleanup/unsharing of queues */ 1425 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1426 1427 /* Make sure we have free resources for this STA */ 1428 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1429 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1430 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1431 IWL_MVM_QUEUE_FREE)) 1432 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1433 else 1434 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1435 IWL_MVM_DQA_MIN_DATA_QUEUE, 1436 IWL_MVM_DQA_MAX_DATA_QUEUE); 1437 if (queue < 0) { 1438 /* try again - this time kick out a queue if needed */ 1439 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1440 if (queue < 0) { 1441 IWL_ERR(mvm, "No available queues for new station\n"); 1442 return -ENOSPC; 1443 } 1444 } 1445 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1446 1447 mvmsta->reserved_queue = queue; 1448 1449 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1450 queue, mvmsta->sta_id); 1451 1452 return 0; 1453 } 1454 1455 /* 1456 * In DQA mode, after a HW restart the queues should be allocated as before, in 1457 * order to avoid race conditions when there are shared queues. This function 1458 * does the re-mapping and queue allocation. 1459 * 1460 * Note that re-enabling aggregations isn't done in this function. 1461 */ 1462 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1463 struct ieee80211_sta *sta) 1464 { 1465 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1466 unsigned int wdg = 1467 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1468 int i; 1469 struct iwl_trans_txq_scd_cfg cfg = { 1470 .sta_id = mvm_sta->sta_id, 1471 .frame_limit = IWL_FRAME_LIMIT, 1472 }; 1473 1474 /* Make sure reserved queue is still marked as such (if allocated) */ 1475 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1476 mvm->queue_info[mvm_sta->reserved_queue].status = 1477 IWL_MVM_QUEUE_RESERVED; 1478 1479 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1480 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1481 int txq_id = tid_data->txq_id; 1482 int ac; 1483 1484 if (txq_id == IWL_MVM_INVALID_QUEUE) 1485 continue; 1486 1487 ac = tid_to_mac80211_ac[i]; 1488 1489 if (iwl_mvm_has_new_tx_api(mvm)) { 1490 IWL_DEBUG_TX_QUEUES(mvm, 1491 "Re-mapping sta %d tid %d\n", 1492 mvm_sta->sta_id, i); 1493 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1494 i, wdg); 1495 /* 1496 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1497 * to try again later, we have no other good way of 1498 * failing here 1499 */ 1500 if (txq_id < 0) 1501 txq_id = IWL_MVM_INVALID_QUEUE; 1502 tid_data->txq_id = txq_id; 1503 1504 /* 1505 * Since we don't set the seq number after reset, and HW 1506 * sets it now, FW reset will cause the seq num to start 1507 * at 0 again, so driver will need to update it 1508 * internally as well, so it keeps in sync with real val 1509 */ 1510 tid_data->seq_number = 0; 1511 } else { 1512 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1513 1514 cfg.tid = i; 1515 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1516 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1517 txq_id == 1518 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1519 1520 IWL_DEBUG_TX_QUEUES(mvm, 1521 "Re-mapping sta %d tid %d to queue %d\n", 1522 mvm_sta->sta_id, i, txq_id); 1523 1524 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1525 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1526 } 1527 } 1528 } 1529 1530 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1531 struct iwl_mvm_int_sta *sta, 1532 const u8 *addr, 1533 u16 mac_id, u16 color) 1534 { 1535 struct iwl_mvm_add_sta_cmd cmd; 1536 int ret; 1537 u32 status = ADD_STA_SUCCESS; 1538 1539 lockdep_assert_held(&mvm->mutex); 1540 1541 memset(&cmd, 0, sizeof(cmd)); 1542 cmd.sta_id = sta->sta_id; 1543 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1544 color)); 1545 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1546 cmd.station_type = sta->type; 1547 1548 if (!iwl_mvm_has_new_tx_api(mvm)) 1549 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1550 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1551 1552 if (addr) 1553 memcpy(cmd.addr, addr, ETH_ALEN); 1554 1555 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1556 iwl_mvm_add_sta_cmd_size(mvm), 1557 &cmd, &status); 1558 if (ret) 1559 return ret; 1560 1561 switch (status & IWL_ADD_STA_STATUS_MASK) { 1562 case ADD_STA_SUCCESS: 1563 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1564 return 0; 1565 default: 1566 ret = -EIO; 1567 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1568 status); 1569 break; 1570 } 1571 return ret; 1572 } 1573 1574 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1575 struct ieee80211_vif *vif, 1576 struct ieee80211_sta *sta) 1577 { 1578 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1579 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1580 struct iwl_mvm_rxq_dup_data *dup_data; 1581 int i, ret, sta_id; 1582 bool sta_update = false; 1583 unsigned int sta_flags = 0; 1584 1585 lockdep_assert_held(&mvm->mutex); 1586 1587 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1588 sta_id = iwl_mvm_find_free_sta_id(mvm, 1589 ieee80211_vif_type_p2p(vif)); 1590 else 1591 sta_id = mvm_sta->sta_id; 1592 1593 if (sta_id == IWL_MVM_INVALID_STA) 1594 return -ENOSPC; 1595 1596 spin_lock_init(&mvm_sta->lock); 1597 1598 /* if this is a HW restart re-alloc existing queues */ 1599 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1600 struct iwl_mvm_int_sta tmp_sta = { 1601 .sta_id = sta_id, 1602 .type = mvm_sta->sta_type, 1603 }; 1604 1605 /* 1606 * First add an empty station since allocating 1607 * a queue requires a valid station 1608 */ 1609 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1610 mvmvif->id, mvmvif->color); 1611 if (ret) 1612 goto err; 1613 1614 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1615 sta_update = true; 1616 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1617 goto update_fw; 1618 } 1619 1620 mvm_sta->sta_id = sta_id; 1621 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1622 mvmvif->color); 1623 mvm_sta->vif = vif; 1624 if (!mvm->trans->trans_cfg->gen2) 1625 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1626 else 1627 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1628 mvm_sta->tx_protection = 0; 1629 mvm_sta->tt_tx_protection = false; 1630 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1631 1632 /* HW restart, don't assume the memory has been zeroed */ 1633 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1634 mvm_sta->tfd_queue_msk = 0; 1635 1636 /* for HW restart - reset everything but the sequence number */ 1637 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1638 u16 seq = mvm_sta->tid_data[i].seq_number; 1639 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1640 mvm_sta->tid_data[i].seq_number = seq; 1641 1642 /* 1643 * Mark all queues for this STA as unallocated and defer TX 1644 * frames until the queue is allocated 1645 */ 1646 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1647 } 1648 1649 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1650 struct iwl_mvm_txq *mvmtxq = 1651 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1652 1653 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1654 INIT_LIST_HEAD(&mvmtxq->list); 1655 atomic_set(&mvmtxq->tx_request, 0); 1656 } 1657 1658 mvm_sta->agg_tids = 0; 1659 1660 if (iwl_mvm_has_new_rx_api(mvm) && 1661 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1662 int q; 1663 1664 dup_data = kcalloc(mvm->trans->num_rx_queues, 1665 sizeof(*dup_data), GFP_KERNEL); 1666 if (!dup_data) 1667 return -ENOMEM; 1668 /* 1669 * Initialize all the last_seq values to 0xffff which can never 1670 * compare equal to the frame's seq_ctrl in the check in 1671 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1672 * number and fragmented packets don't reach that function. 1673 * 1674 * This thus allows receiving a packet with seqno 0 and the 1675 * retry bit set as the very first packet on a new TID. 1676 */ 1677 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1678 memset(dup_data[q].last_seq, 0xff, 1679 sizeof(dup_data[q].last_seq)); 1680 mvm_sta->dup_data = dup_data; 1681 } 1682 1683 if (!iwl_mvm_has_new_tx_api(mvm)) { 1684 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1685 ieee80211_vif_type_p2p(vif)); 1686 if (ret) 1687 goto err; 1688 } 1689 1690 /* 1691 * if rs is registered with mac80211, then "add station" will be handled 1692 * via the corresponding ops, otherwise need to notify rate scaling here 1693 */ 1694 if (iwl_mvm_has_tlc_offload(mvm)) 1695 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1696 else 1697 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1698 1699 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1700 1701 update_fw: 1702 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1703 if (ret) 1704 goto err; 1705 1706 if (vif->type == NL80211_IFTYPE_STATION) { 1707 if (!sta->tdls) { 1708 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1709 mvmvif->ap_sta_id = sta_id; 1710 } else { 1711 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1712 } 1713 } 1714 1715 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1716 1717 return 0; 1718 1719 err: 1720 return ret; 1721 } 1722 1723 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1724 bool drain) 1725 { 1726 struct iwl_mvm_add_sta_cmd cmd = {}; 1727 int ret; 1728 u32 status; 1729 1730 lockdep_assert_held(&mvm->mutex); 1731 1732 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1733 cmd.sta_id = mvmsta->sta_id; 1734 cmd.add_modify = STA_MODE_MODIFY; 1735 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1736 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1737 1738 status = ADD_STA_SUCCESS; 1739 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1740 iwl_mvm_add_sta_cmd_size(mvm), 1741 &cmd, &status); 1742 if (ret) 1743 return ret; 1744 1745 switch (status & IWL_ADD_STA_STATUS_MASK) { 1746 case ADD_STA_SUCCESS: 1747 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1748 mvmsta->sta_id); 1749 break; 1750 default: 1751 ret = -EIO; 1752 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1753 mvmsta->sta_id); 1754 break; 1755 } 1756 1757 return ret; 1758 } 1759 1760 /* 1761 * Remove a station from the FW table. Before sending the command to remove 1762 * the station validate that the station is indeed known to the driver (sanity 1763 * only). 1764 */ 1765 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1766 { 1767 struct ieee80211_sta *sta; 1768 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1769 .sta_id = sta_id, 1770 }; 1771 int ret; 1772 1773 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1774 lockdep_is_held(&mvm->mutex)); 1775 1776 /* Note: internal stations are marked as error values */ 1777 if (!sta) { 1778 IWL_ERR(mvm, "Invalid station id\n"); 1779 return -EINVAL; 1780 } 1781 1782 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1783 sizeof(rm_sta_cmd), &rm_sta_cmd); 1784 if (ret) { 1785 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1786 return ret; 1787 } 1788 1789 return 0; 1790 } 1791 1792 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1793 struct ieee80211_vif *vif, 1794 struct ieee80211_sta *sta) 1795 { 1796 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1797 int i; 1798 1799 lockdep_assert_held(&mvm->mutex); 1800 1801 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1802 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1803 continue; 1804 1805 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1806 0); 1807 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1808 } 1809 1810 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1811 struct iwl_mvm_txq *mvmtxq = 1812 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1813 1814 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1815 } 1816 } 1817 1818 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1819 struct iwl_mvm_sta *mvm_sta) 1820 { 1821 int i; 1822 1823 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1824 u16 txq_id; 1825 int ret; 1826 1827 spin_lock_bh(&mvm_sta->lock); 1828 txq_id = mvm_sta->tid_data[i].txq_id; 1829 spin_unlock_bh(&mvm_sta->lock); 1830 1831 if (txq_id == IWL_MVM_INVALID_QUEUE) 1832 continue; 1833 1834 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1835 if (ret) 1836 return ret; 1837 } 1838 1839 return 0; 1840 } 1841 1842 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1843 struct ieee80211_vif *vif, 1844 struct ieee80211_sta *sta) 1845 { 1846 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1847 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1848 u8 sta_id = mvm_sta->sta_id; 1849 int ret; 1850 1851 lockdep_assert_held(&mvm->mutex); 1852 1853 if (iwl_mvm_has_new_rx_api(mvm)) 1854 kfree(mvm_sta->dup_data); 1855 1856 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1857 if (ret) 1858 return ret; 1859 1860 /* flush its queues here since we are freeing mvm_sta */ 1861 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1862 if (ret) 1863 return ret; 1864 if (iwl_mvm_has_new_tx_api(mvm)) { 1865 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1866 } else { 1867 u32 q_mask = mvm_sta->tfd_queue_msk; 1868 1869 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1870 q_mask); 1871 } 1872 if (ret) 1873 return ret; 1874 1875 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1876 1877 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1878 1879 /* If there is a TXQ still marked as reserved - free it */ 1880 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1881 u8 reserved_txq = mvm_sta->reserved_queue; 1882 enum iwl_mvm_queue_status *status; 1883 1884 /* 1885 * If no traffic has gone through the reserved TXQ - it 1886 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1887 * should be manually marked as free again 1888 */ 1889 status = &mvm->queue_info[reserved_txq].status; 1890 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1891 (*status != IWL_MVM_QUEUE_FREE), 1892 "sta_id %d reserved txq %d status %d", 1893 sta_id, reserved_txq, *status)) 1894 return -EINVAL; 1895 1896 *status = IWL_MVM_QUEUE_FREE; 1897 } 1898 1899 if (vif->type == NL80211_IFTYPE_STATION && 1900 mvmvif->ap_sta_id == sta_id) { 1901 /* if associated - we can't remove the AP STA now */ 1902 if (vif->bss_conf.assoc) 1903 return ret; 1904 1905 /* unassoc - go ahead - remove the AP STA now */ 1906 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1907 } 1908 1909 /* 1910 * This shouldn't happen - the TDLS channel switch should be canceled 1911 * before the STA is removed. 1912 */ 1913 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1914 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1915 cancel_delayed_work(&mvm->tdls_cs.dwork); 1916 } 1917 1918 /* 1919 * Make sure that the tx response code sees the station as -EBUSY and 1920 * calls the drain worker. 1921 */ 1922 spin_lock_bh(&mvm_sta->lock); 1923 spin_unlock_bh(&mvm_sta->lock); 1924 1925 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1926 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1927 1928 return ret; 1929 } 1930 1931 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1932 struct ieee80211_vif *vif, 1933 u8 sta_id) 1934 { 1935 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1936 1937 lockdep_assert_held(&mvm->mutex); 1938 1939 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1940 return ret; 1941 } 1942 1943 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1944 struct iwl_mvm_int_sta *sta, 1945 u32 qmask, enum nl80211_iftype iftype, 1946 enum iwl_sta_type type) 1947 { 1948 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1949 sta->sta_id == IWL_MVM_INVALID_STA) { 1950 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1951 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1952 return -ENOSPC; 1953 } 1954 1955 sta->tfd_queue_msk = qmask; 1956 sta->type = type; 1957 1958 /* put a non-NULL value so iterating over the stations won't stop */ 1959 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1960 return 0; 1961 } 1962 1963 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1964 { 1965 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1966 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1967 sta->sta_id = IWL_MVM_INVALID_STA; 1968 } 1969 1970 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 1971 u8 sta_id, u8 fifo) 1972 { 1973 unsigned int wdg_timeout = 1974 mvm->trans->trans_cfg->base_params->wd_timeout; 1975 struct iwl_trans_txq_scd_cfg cfg = { 1976 .fifo = fifo, 1977 .sta_id = sta_id, 1978 .tid = IWL_MAX_TID_COUNT, 1979 .aggregate = false, 1980 .frame_limit = IWL_FRAME_LIMIT, 1981 }; 1982 1983 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1984 1985 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 1986 } 1987 1988 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 1989 { 1990 unsigned int wdg_timeout = 1991 mvm->trans->trans_cfg->base_params->wd_timeout; 1992 1993 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1994 1995 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 1996 wdg_timeout); 1997 } 1998 1999 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2000 int maccolor, 2001 struct iwl_mvm_int_sta *sta, 2002 u16 *queue, int fifo) 2003 { 2004 int ret; 2005 2006 /* Map queue to fifo - needs to happen before adding station */ 2007 if (!iwl_mvm_has_new_tx_api(mvm)) 2008 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2009 2010 ret = iwl_mvm_add_int_sta_common(mvm, sta, NULL, macidx, maccolor); 2011 if (ret) { 2012 if (!iwl_mvm_has_new_tx_api(mvm)) 2013 iwl_mvm_disable_txq(mvm, NULL, *queue, 2014 IWL_MAX_TID_COUNT, 0); 2015 return ret; 2016 } 2017 2018 /* 2019 * For 22000 firmware and on we cannot add queue to a station unknown 2020 * to firmware so enable queue here - after the station was added 2021 */ 2022 if (iwl_mvm_has_new_tx_api(mvm)) { 2023 int txq; 2024 2025 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2026 if (txq < 0) { 2027 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2028 return txq; 2029 } 2030 2031 *queue = txq; 2032 } 2033 2034 return 0; 2035 } 2036 2037 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 2038 { 2039 int ret; 2040 2041 lockdep_assert_held(&mvm->mutex); 2042 2043 /* Allocate aux station and assign to it the aux queue */ 2044 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2045 NL80211_IFTYPE_UNSPECIFIED, 2046 IWL_STA_AUX_ACTIVITY); 2047 if (ret) 2048 return ret; 2049 2050 ret = iwl_mvm_add_int_sta_with_queue(mvm, MAC_INDEX_AUX, 0, 2051 &mvm->aux_sta, &mvm->aux_queue, 2052 IWL_MVM_TX_FIFO_MCAST); 2053 if (ret) { 2054 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2055 return ret; 2056 } 2057 2058 return 0; 2059 } 2060 2061 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2062 { 2063 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2064 2065 lockdep_assert_held(&mvm->mutex); 2066 2067 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2068 &mvm->snif_sta, &mvm->snif_queue, 2069 IWL_MVM_TX_FIFO_BE); 2070 } 2071 2072 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2073 { 2074 int ret; 2075 2076 lockdep_assert_held(&mvm->mutex); 2077 2078 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2079 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2080 if (ret) 2081 IWL_WARN(mvm, "Failed sending remove station\n"); 2082 2083 return ret; 2084 } 2085 2086 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2087 { 2088 int ret; 2089 2090 lockdep_assert_held(&mvm->mutex); 2091 2092 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_queue, IWL_MAX_TID_COUNT, 0); 2093 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2094 if (ret) 2095 IWL_WARN(mvm, "Failed sending remove station\n"); 2096 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2097 2098 return ret; 2099 } 2100 2101 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2102 { 2103 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2104 } 2105 2106 /* 2107 * Send the add station command for the vif's broadcast station. 2108 * Assumes that the station was already allocated. 2109 * 2110 * @mvm: the mvm component 2111 * @vif: the interface to which the broadcast station is added 2112 * @bsta: the broadcast station to add. 2113 */ 2114 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2115 { 2116 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2117 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2118 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2119 const u8 *baddr = _baddr; 2120 int queue; 2121 int ret; 2122 unsigned int wdg_timeout = 2123 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2124 struct iwl_trans_txq_scd_cfg cfg = { 2125 .fifo = IWL_MVM_TX_FIFO_VO, 2126 .sta_id = mvmvif->bcast_sta.sta_id, 2127 .tid = IWL_MAX_TID_COUNT, 2128 .aggregate = false, 2129 .frame_limit = IWL_FRAME_LIMIT, 2130 }; 2131 2132 lockdep_assert_held(&mvm->mutex); 2133 2134 if (!iwl_mvm_has_new_tx_api(mvm)) { 2135 if (vif->type == NL80211_IFTYPE_AP || 2136 vif->type == NL80211_IFTYPE_ADHOC) { 2137 queue = mvm->probe_queue; 2138 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2139 queue = mvm->p2p_dev_queue; 2140 } else { 2141 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2142 return -EINVAL; 2143 } 2144 2145 bsta->tfd_queue_msk |= BIT(queue); 2146 2147 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2148 } 2149 2150 if (vif->type == NL80211_IFTYPE_ADHOC) 2151 baddr = vif->bss_conf.bssid; 2152 2153 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2154 return -ENOSPC; 2155 2156 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2157 mvmvif->id, mvmvif->color); 2158 if (ret) 2159 return ret; 2160 2161 /* 2162 * For 22000 firmware and on we cannot add queue to a station unknown 2163 * to firmware so enable queue here - after the station was added 2164 */ 2165 if (iwl_mvm_has_new_tx_api(mvm)) { 2166 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2167 IWL_MAX_TID_COUNT, 2168 wdg_timeout); 2169 if (queue < 0) { 2170 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2171 return queue; 2172 } 2173 2174 if (vif->type == NL80211_IFTYPE_AP || 2175 vif->type == NL80211_IFTYPE_ADHOC) 2176 mvm->probe_queue = queue; 2177 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2178 mvm->p2p_dev_queue = queue; 2179 } 2180 2181 return 0; 2182 } 2183 2184 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2185 struct ieee80211_vif *vif) 2186 { 2187 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2188 int queue; 2189 2190 lockdep_assert_held(&mvm->mutex); 2191 2192 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2193 2194 switch (vif->type) { 2195 case NL80211_IFTYPE_AP: 2196 case NL80211_IFTYPE_ADHOC: 2197 queue = mvm->probe_queue; 2198 break; 2199 case NL80211_IFTYPE_P2P_DEVICE: 2200 queue = mvm->p2p_dev_queue; 2201 break; 2202 default: 2203 WARN(1, "Can't free bcast queue on vif type %d\n", 2204 vif->type); 2205 return; 2206 } 2207 2208 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2209 if (iwl_mvm_has_new_tx_api(mvm)) 2210 return; 2211 2212 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2213 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2214 } 2215 2216 /* Send the FW a request to remove the station from it's internal data 2217 * structures, but DO NOT remove the entry from the local data structures. */ 2218 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2219 { 2220 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2221 int ret; 2222 2223 lockdep_assert_held(&mvm->mutex); 2224 2225 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2226 2227 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2228 if (ret) 2229 IWL_WARN(mvm, "Failed sending remove station\n"); 2230 return ret; 2231 } 2232 2233 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2234 { 2235 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2236 2237 lockdep_assert_held(&mvm->mutex); 2238 2239 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2240 ieee80211_vif_type_p2p(vif), 2241 IWL_STA_GENERAL_PURPOSE); 2242 } 2243 2244 /* Allocate a new station entry for the broadcast station to the given vif, 2245 * and send it to the FW. 2246 * Note that each P2P mac should have its own broadcast station. 2247 * 2248 * @mvm: the mvm component 2249 * @vif: the interface to which the broadcast station is added 2250 * @bsta: the broadcast station to add. */ 2251 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2252 { 2253 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2254 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2255 int ret; 2256 2257 lockdep_assert_held(&mvm->mutex); 2258 2259 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2260 if (ret) 2261 return ret; 2262 2263 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2264 2265 if (ret) 2266 iwl_mvm_dealloc_int_sta(mvm, bsta); 2267 2268 return ret; 2269 } 2270 2271 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2272 { 2273 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2274 2275 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2276 } 2277 2278 /* 2279 * Send the FW a request to remove the station from it's internal data 2280 * structures, and in addition remove it from the local data structure. 2281 */ 2282 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2283 { 2284 int ret; 2285 2286 lockdep_assert_held(&mvm->mutex); 2287 2288 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2289 2290 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2291 2292 return ret; 2293 } 2294 2295 /* 2296 * Allocate a new station entry for the multicast station to the given vif, 2297 * and send it to the FW. 2298 * Note that each AP/GO mac should have its own multicast station. 2299 * 2300 * @mvm: the mvm component 2301 * @vif: the interface to which the multicast station is added 2302 */ 2303 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2304 { 2305 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2306 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2307 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2308 const u8 *maddr = _maddr; 2309 struct iwl_trans_txq_scd_cfg cfg = { 2310 .fifo = vif->type == NL80211_IFTYPE_AP ? 2311 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2312 .sta_id = msta->sta_id, 2313 .tid = 0, 2314 .aggregate = false, 2315 .frame_limit = IWL_FRAME_LIMIT, 2316 }; 2317 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2318 int ret; 2319 2320 lockdep_assert_held(&mvm->mutex); 2321 2322 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2323 vif->type != NL80211_IFTYPE_ADHOC)) 2324 return -ENOTSUPP; 2325 2326 /* 2327 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2328 * invalid, so make sure we use the queue we want. 2329 * Note that this is done here as we want to avoid making DQA 2330 * changes in mac80211 layer. 2331 */ 2332 if (vif->type == NL80211_IFTYPE_ADHOC) 2333 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2334 2335 /* 2336 * While in previous FWs we had to exclude cab queue from TFD queue 2337 * mask, now it is needed as any other queue. 2338 */ 2339 if (!iwl_mvm_has_new_tx_api(mvm) && 2340 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2341 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2342 timeout); 2343 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2344 } 2345 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2346 mvmvif->id, mvmvif->color); 2347 if (ret) 2348 goto err; 2349 2350 /* 2351 * Enable cab queue after the ADD_STA command is sent. 2352 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2353 * command with unknown station id, and for FW that doesn't support 2354 * station API since the cab queue is not included in the 2355 * tfd_queue_mask. 2356 */ 2357 if (iwl_mvm_has_new_tx_api(mvm)) { 2358 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2359 0, 2360 timeout); 2361 if (queue < 0) { 2362 ret = queue; 2363 goto err; 2364 } 2365 mvmvif->cab_queue = queue; 2366 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2367 IWL_UCODE_TLV_API_STA_TYPE)) 2368 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2369 timeout); 2370 2371 return 0; 2372 err: 2373 iwl_mvm_dealloc_int_sta(mvm, msta); 2374 return ret; 2375 } 2376 2377 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2378 struct ieee80211_key_conf *keyconf, 2379 bool mcast) 2380 { 2381 union { 2382 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2383 struct iwl_mvm_add_sta_key_cmd cmd; 2384 } u = {}; 2385 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2386 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2387 __le16 key_flags; 2388 int ret, size; 2389 u32 status; 2390 2391 /* This is a valid situation for GTK removal */ 2392 if (sta_id == IWL_MVM_INVALID_STA) 2393 return 0; 2394 2395 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2396 STA_KEY_FLG_KEYID_MSK); 2397 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2398 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2399 2400 if (mcast) 2401 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2402 2403 /* 2404 * The fields assigned here are in the same location at the start 2405 * of the command, so we can do this union trick. 2406 */ 2407 u.cmd.common.key_flags = key_flags; 2408 u.cmd.common.key_offset = keyconf->hw_key_idx; 2409 u.cmd.common.sta_id = sta_id; 2410 2411 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2412 2413 status = ADD_STA_SUCCESS; 2414 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2415 &status); 2416 2417 switch (status) { 2418 case ADD_STA_SUCCESS: 2419 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2420 break; 2421 default: 2422 ret = -EIO; 2423 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2424 break; 2425 } 2426 2427 return ret; 2428 } 2429 2430 /* 2431 * Send the FW a request to remove the station from it's internal data 2432 * structures, and in addition remove it from the local data structure. 2433 */ 2434 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2435 { 2436 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2437 int ret; 2438 2439 lockdep_assert_held(&mvm->mutex); 2440 2441 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2442 2443 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2444 2445 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2446 if (ret) 2447 IWL_WARN(mvm, "Failed sending remove station\n"); 2448 2449 return ret; 2450 } 2451 2452 #define IWL_MAX_RX_BA_SESSIONS 16 2453 2454 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2455 { 2456 struct iwl_mvm_rss_sync_notif notif = { 2457 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2458 .metadata.sync = 1, 2459 .delba.baid = baid, 2460 }; 2461 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2462 }; 2463 2464 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2465 struct iwl_mvm_baid_data *data) 2466 { 2467 int i; 2468 2469 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2470 2471 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2472 int j; 2473 struct iwl_mvm_reorder_buffer *reorder_buf = 2474 &data->reorder_buf[i]; 2475 struct iwl_mvm_reorder_buf_entry *entries = 2476 &data->entries[i * data->entries_per_queue]; 2477 2478 spin_lock_bh(&reorder_buf->lock); 2479 if (likely(!reorder_buf->num_stored)) { 2480 spin_unlock_bh(&reorder_buf->lock); 2481 continue; 2482 } 2483 2484 /* 2485 * This shouldn't happen in regular DELBA since the internal 2486 * delBA notification should trigger a release of all frames in 2487 * the reorder buffer. 2488 */ 2489 WARN_ON(1); 2490 2491 for (j = 0; j < reorder_buf->buf_size; j++) 2492 __skb_queue_purge(&entries[j].e.frames); 2493 /* 2494 * Prevent timer re-arm. This prevents a very far fetched case 2495 * where we timed out on the notification. There may be prior 2496 * RX frames pending in the RX queue before the notification 2497 * that might get processed between now and the actual deletion 2498 * and we would re-arm the timer although we are deleting the 2499 * reorder buffer. 2500 */ 2501 reorder_buf->removed = true; 2502 spin_unlock_bh(&reorder_buf->lock); 2503 del_timer_sync(&reorder_buf->reorder_timer); 2504 } 2505 } 2506 2507 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2508 struct iwl_mvm_baid_data *data, 2509 u16 ssn, u16 buf_size) 2510 { 2511 int i; 2512 2513 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2514 struct iwl_mvm_reorder_buffer *reorder_buf = 2515 &data->reorder_buf[i]; 2516 struct iwl_mvm_reorder_buf_entry *entries = 2517 &data->entries[i * data->entries_per_queue]; 2518 int j; 2519 2520 reorder_buf->num_stored = 0; 2521 reorder_buf->head_sn = ssn; 2522 reorder_buf->buf_size = buf_size; 2523 /* rx reorder timer */ 2524 timer_setup(&reorder_buf->reorder_timer, 2525 iwl_mvm_reorder_timer_expired, 0); 2526 spin_lock_init(&reorder_buf->lock); 2527 reorder_buf->mvm = mvm; 2528 reorder_buf->queue = i; 2529 reorder_buf->valid = false; 2530 for (j = 0; j < reorder_buf->buf_size; j++) 2531 __skb_queue_head_init(&entries[j].e.frames); 2532 } 2533 } 2534 2535 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2536 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2537 { 2538 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2539 struct iwl_mvm_add_sta_cmd cmd = {}; 2540 struct iwl_mvm_baid_data *baid_data = NULL; 2541 int ret; 2542 u32 status; 2543 2544 lockdep_assert_held(&mvm->mutex); 2545 2546 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2547 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2548 return -ENOSPC; 2549 } 2550 2551 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2552 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2553 2554 /* sparse doesn't like the __align() so don't check */ 2555 #ifndef __CHECKER__ 2556 /* 2557 * The division below will be OK if either the cache line size 2558 * can be divided by the entry size (ALIGN will round up) or if 2559 * if the entry size can be divided by the cache line size, in 2560 * which case the ALIGN() will do nothing. 2561 */ 2562 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2563 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2564 #endif 2565 2566 /* 2567 * Upward align the reorder buffer size to fill an entire cache 2568 * line for each queue, to avoid sharing cache lines between 2569 * different queues. 2570 */ 2571 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2572 2573 /* 2574 * Allocate here so if allocation fails we can bail out early 2575 * before starting the BA session in the firmware 2576 */ 2577 baid_data = kzalloc(sizeof(*baid_data) + 2578 mvm->trans->num_rx_queues * 2579 reorder_buf_size, 2580 GFP_KERNEL); 2581 if (!baid_data) 2582 return -ENOMEM; 2583 2584 /* 2585 * This division is why we need the above BUILD_BUG_ON(), 2586 * if that doesn't hold then this will not be right. 2587 */ 2588 baid_data->entries_per_queue = 2589 reorder_buf_size / sizeof(baid_data->entries[0]); 2590 } 2591 2592 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2593 cmd.sta_id = mvm_sta->sta_id; 2594 cmd.add_modify = STA_MODE_MODIFY; 2595 if (start) { 2596 cmd.add_immediate_ba_tid = (u8) tid; 2597 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2598 cmd.rx_ba_window = cpu_to_le16(buf_size); 2599 } else { 2600 cmd.remove_immediate_ba_tid = (u8) tid; 2601 } 2602 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2603 STA_MODIFY_REMOVE_BA_TID; 2604 2605 status = ADD_STA_SUCCESS; 2606 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2607 iwl_mvm_add_sta_cmd_size(mvm), 2608 &cmd, &status); 2609 if (ret) 2610 goto out_free; 2611 2612 switch (status & IWL_ADD_STA_STATUS_MASK) { 2613 case ADD_STA_SUCCESS: 2614 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2615 start ? "start" : "stopp"); 2616 break; 2617 case ADD_STA_IMMEDIATE_BA_FAILURE: 2618 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2619 ret = -ENOSPC; 2620 break; 2621 default: 2622 ret = -EIO; 2623 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2624 start ? "start" : "stopp", status); 2625 break; 2626 } 2627 2628 if (ret) 2629 goto out_free; 2630 2631 if (start) { 2632 u8 baid; 2633 2634 mvm->rx_ba_sessions++; 2635 2636 if (!iwl_mvm_has_new_rx_api(mvm)) 2637 return 0; 2638 2639 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2640 ret = -EINVAL; 2641 goto out_free; 2642 } 2643 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2644 IWL_ADD_STA_BAID_SHIFT); 2645 baid_data->baid = baid; 2646 baid_data->timeout = timeout; 2647 baid_data->last_rx = jiffies; 2648 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2649 timer_setup(&baid_data->session_timer, 2650 iwl_mvm_rx_agg_session_expired, 0); 2651 baid_data->mvm = mvm; 2652 baid_data->tid = tid; 2653 baid_data->sta_id = mvm_sta->sta_id; 2654 2655 mvm_sta->tid_to_baid[tid] = baid; 2656 if (timeout) 2657 mod_timer(&baid_data->session_timer, 2658 TU_TO_EXP_TIME(timeout * 2)); 2659 2660 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2661 /* 2662 * protect the BA data with RCU to cover a case where our 2663 * internal RX sync mechanism will timeout (not that it's 2664 * supposed to happen) and we will free the session data while 2665 * RX is being processed in parallel 2666 */ 2667 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2668 mvm_sta->sta_id, tid, baid); 2669 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2670 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2671 } else { 2672 u8 baid = mvm_sta->tid_to_baid[tid]; 2673 2674 if (mvm->rx_ba_sessions > 0) 2675 /* check that restart flow didn't zero the counter */ 2676 mvm->rx_ba_sessions--; 2677 if (!iwl_mvm_has_new_rx_api(mvm)) 2678 return 0; 2679 2680 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2681 return -EINVAL; 2682 2683 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2684 if (WARN_ON(!baid_data)) 2685 return -EINVAL; 2686 2687 /* synchronize all rx queues so we can safely delete */ 2688 iwl_mvm_free_reorder(mvm, baid_data); 2689 del_timer_sync(&baid_data->session_timer); 2690 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2691 kfree_rcu(baid_data, rcu_head); 2692 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2693 } 2694 return 0; 2695 2696 out_free: 2697 kfree(baid_data); 2698 return ret; 2699 } 2700 2701 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2702 int tid, u8 queue, bool start) 2703 { 2704 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2705 struct iwl_mvm_add_sta_cmd cmd = {}; 2706 int ret; 2707 u32 status; 2708 2709 lockdep_assert_held(&mvm->mutex); 2710 2711 if (start) { 2712 mvm_sta->tfd_queue_msk |= BIT(queue); 2713 mvm_sta->tid_disable_agg &= ~BIT(tid); 2714 } else { 2715 /* In DQA-mode the queue isn't removed on agg termination */ 2716 mvm_sta->tid_disable_agg |= BIT(tid); 2717 } 2718 2719 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2720 cmd.sta_id = mvm_sta->sta_id; 2721 cmd.add_modify = STA_MODE_MODIFY; 2722 if (!iwl_mvm_has_new_tx_api(mvm)) 2723 cmd.modify_mask = STA_MODIFY_QUEUES; 2724 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2725 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2726 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2727 2728 status = ADD_STA_SUCCESS; 2729 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2730 iwl_mvm_add_sta_cmd_size(mvm), 2731 &cmd, &status); 2732 if (ret) 2733 return ret; 2734 2735 switch (status & IWL_ADD_STA_STATUS_MASK) { 2736 case ADD_STA_SUCCESS: 2737 break; 2738 default: 2739 ret = -EIO; 2740 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2741 start ? "start" : "stopp", status); 2742 break; 2743 } 2744 2745 return ret; 2746 } 2747 2748 const u8 tid_to_mac80211_ac[] = { 2749 IEEE80211_AC_BE, 2750 IEEE80211_AC_BK, 2751 IEEE80211_AC_BK, 2752 IEEE80211_AC_BE, 2753 IEEE80211_AC_VI, 2754 IEEE80211_AC_VI, 2755 IEEE80211_AC_VO, 2756 IEEE80211_AC_VO, 2757 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2758 }; 2759 2760 static const u8 tid_to_ucode_ac[] = { 2761 AC_BE, 2762 AC_BK, 2763 AC_BK, 2764 AC_BE, 2765 AC_VI, 2766 AC_VI, 2767 AC_VO, 2768 AC_VO, 2769 }; 2770 2771 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2772 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2773 { 2774 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2775 struct iwl_mvm_tid_data *tid_data; 2776 u16 normalized_ssn; 2777 u16 txq_id; 2778 int ret; 2779 2780 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2781 return -EINVAL; 2782 2783 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2784 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2785 IWL_ERR(mvm, 2786 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2787 mvmsta->tid_data[tid].state); 2788 return -ENXIO; 2789 } 2790 2791 lockdep_assert_held(&mvm->mutex); 2792 2793 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2794 iwl_mvm_has_new_tx_api(mvm)) { 2795 u8 ac = tid_to_mac80211_ac[tid]; 2796 2797 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2798 if (ret) 2799 return ret; 2800 } 2801 2802 spin_lock_bh(&mvmsta->lock); 2803 2804 /* 2805 * Note the possible cases: 2806 * 1. An enabled TXQ - TXQ needs to become agg'ed 2807 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2808 * it as reserved 2809 */ 2810 txq_id = mvmsta->tid_data[tid].txq_id; 2811 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2812 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2813 IWL_MVM_DQA_MIN_DATA_QUEUE, 2814 IWL_MVM_DQA_MAX_DATA_QUEUE); 2815 if (ret < 0) { 2816 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2817 goto out; 2818 } 2819 2820 txq_id = ret; 2821 2822 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2823 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2824 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2825 ret = -ENXIO; 2826 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2827 tid, IWL_MAX_HW_QUEUES - 1); 2828 goto out; 2829 2830 } else if (unlikely(mvm->queue_info[txq_id].status == 2831 IWL_MVM_QUEUE_SHARED)) { 2832 ret = -ENXIO; 2833 IWL_DEBUG_TX_QUEUES(mvm, 2834 "Can't start tid %d agg on shared queue!\n", 2835 tid); 2836 goto out; 2837 } 2838 2839 IWL_DEBUG_TX_QUEUES(mvm, 2840 "AGG for tid %d will be on queue #%d\n", 2841 tid, txq_id); 2842 2843 tid_data = &mvmsta->tid_data[tid]; 2844 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2845 tid_data->txq_id = txq_id; 2846 *ssn = tid_data->ssn; 2847 2848 IWL_DEBUG_TX_QUEUES(mvm, 2849 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2850 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2851 tid_data->next_reclaimed); 2852 2853 /* 2854 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2855 * to align the wrap around of ssn so we compare relevant values. 2856 */ 2857 normalized_ssn = tid_data->ssn; 2858 if (mvm->trans->trans_cfg->gen2) 2859 normalized_ssn &= 0xff; 2860 2861 if (normalized_ssn == tid_data->next_reclaimed) { 2862 tid_data->state = IWL_AGG_STARTING; 2863 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2864 } else { 2865 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2866 ret = 0; 2867 } 2868 2869 out: 2870 spin_unlock_bh(&mvmsta->lock); 2871 2872 return ret; 2873 } 2874 2875 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2876 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2877 bool amsdu) 2878 { 2879 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2880 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2881 unsigned int wdg_timeout = 2882 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2883 int queue, ret; 2884 bool alloc_queue = true; 2885 enum iwl_mvm_queue_status queue_status; 2886 u16 ssn; 2887 2888 struct iwl_trans_txq_scd_cfg cfg = { 2889 .sta_id = mvmsta->sta_id, 2890 .tid = tid, 2891 .frame_limit = buf_size, 2892 .aggregate = true, 2893 }; 2894 2895 /* 2896 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2897 * manager, so this function should never be called in this case. 2898 */ 2899 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2900 return -EINVAL; 2901 2902 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2903 != IWL_MAX_TID_COUNT); 2904 2905 spin_lock_bh(&mvmsta->lock); 2906 ssn = tid_data->ssn; 2907 queue = tid_data->txq_id; 2908 tid_data->state = IWL_AGG_ON; 2909 mvmsta->agg_tids |= BIT(tid); 2910 tid_data->ssn = 0xffff; 2911 tid_data->amsdu_in_ampdu_allowed = amsdu; 2912 spin_unlock_bh(&mvmsta->lock); 2913 2914 if (iwl_mvm_has_new_tx_api(mvm)) { 2915 /* 2916 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2917 * would have failed, so if we are here there is no need to 2918 * allocate a queue. 2919 * However, if aggregation size is different than the default 2920 * size, the scheduler should be reconfigured. 2921 * We cannot do this with the new TX API, so return unsupported 2922 * for now, until it will be offloaded to firmware.. 2923 * Note that if SCD default value changes - this condition 2924 * should be updated as well. 2925 */ 2926 if (buf_size < IWL_FRAME_LIMIT) 2927 return -ENOTSUPP; 2928 2929 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2930 if (ret) 2931 return -EIO; 2932 goto out; 2933 } 2934 2935 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2936 2937 queue_status = mvm->queue_info[queue].status; 2938 2939 /* Maybe there is no need to even alloc a queue... */ 2940 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2941 alloc_queue = false; 2942 2943 /* 2944 * Only reconfig the SCD for the queue if the window size has 2945 * changed from current (become smaller) 2946 */ 2947 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2948 /* 2949 * If reconfiguring an existing queue, it first must be 2950 * drained 2951 */ 2952 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2953 BIT(queue)); 2954 if (ret) { 2955 IWL_ERR(mvm, 2956 "Error draining queue before reconfig\n"); 2957 return ret; 2958 } 2959 2960 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2961 mvmsta->sta_id, tid, 2962 buf_size, ssn); 2963 if (ret) { 2964 IWL_ERR(mvm, 2965 "Error reconfiguring TXQ #%d\n", queue); 2966 return ret; 2967 } 2968 } 2969 2970 if (alloc_queue) 2971 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2972 &cfg, wdg_timeout); 2973 2974 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2975 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2976 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2977 if (ret) 2978 return -EIO; 2979 } 2980 2981 /* No need to mark as reserved */ 2982 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2983 2984 out: 2985 /* 2986 * Even though in theory the peer could have different 2987 * aggregation reorder buffer sizes for different sessions, 2988 * our ucode doesn't allow for that and has a global limit 2989 * for each station. Therefore, use the minimum of all the 2990 * aggregation sessions and our default value. 2991 */ 2992 mvmsta->max_agg_bufsize = 2993 min(mvmsta->max_agg_bufsize, buf_size); 2994 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2995 2996 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2997 sta->addr, tid); 2998 2999 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 3000 } 3001 3002 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3003 struct iwl_mvm_sta *mvmsta, 3004 struct iwl_mvm_tid_data *tid_data) 3005 { 3006 u16 txq_id = tid_data->txq_id; 3007 3008 lockdep_assert_held(&mvm->mutex); 3009 3010 if (iwl_mvm_has_new_tx_api(mvm)) 3011 return; 3012 3013 /* 3014 * The TXQ is marked as reserved only if no traffic came through yet 3015 * This means no traffic has been sent on this TID (agg'd or not), so 3016 * we no longer have use for the queue. Since it hasn't even been 3017 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3018 * free. 3019 */ 3020 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3021 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3022 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3023 } 3024 } 3025 3026 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3027 struct ieee80211_sta *sta, u16 tid) 3028 { 3029 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3030 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3031 u16 txq_id; 3032 int err; 3033 3034 /* 3035 * If mac80211 is cleaning its state, then say that we finished since 3036 * our state has been cleared anyway. 3037 */ 3038 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3039 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3040 return 0; 3041 } 3042 3043 spin_lock_bh(&mvmsta->lock); 3044 3045 txq_id = tid_data->txq_id; 3046 3047 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3048 mvmsta->sta_id, tid, txq_id, tid_data->state); 3049 3050 mvmsta->agg_tids &= ~BIT(tid); 3051 3052 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3053 3054 switch (tid_data->state) { 3055 case IWL_AGG_ON: 3056 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3057 3058 IWL_DEBUG_TX_QUEUES(mvm, 3059 "ssn = %d, next_recl = %d\n", 3060 tid_data->ssn, tid_data->next_reclaimed); 3061 3062 tid_data->ssn = 0xffff; 3063 tid_data->state = IWL_AGG_OFF; 3064 spin_unlock_bh(&mvmsta->lock); 3065 3066 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3067 3068 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3069 return 0; 3070 case IWL_AGG_STARTING: 3071 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3072 /* 3073 * The agg session has been stopped before it was set up. This 3074 * can happen when the AddBA timer times out for example. 3075 */ 3076 3077 /* No barriers since we are under mutex */ 3078 lockdep_assert_held(&mvm->mutex); 3079 3080 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3081 tid_data->state = IWL_AGG_OFF; 3082 err = 0; 3083 break; 3084 default: 3085 IWL_ERR(mvm, 3086 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3087 mvmsta->sta_id, tid, tid_data->state); 3088 IWL_ERR(mvm, 3089 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3090 err = -EINVAL; 3091 } 3092 3093 spin_unlock_bh(&mvmsta->lock); 3094 3095 return err; 3096 } 3097 3098 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3099 struct ieee80211_sta *sta, u16 tid) 3100 { 3101 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3102 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3103 u16 txq_id; 3104 enum iwl_mvm_agg_state old_state; 3105 3106 /* 3107 * First set the agg state to OFF to avoid calling 3108 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3109 */ 3110 spin_lock_bh(&mvmsta->lock); 3111 txq_id = tid_data->txq_id; 3112 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3113 mvmsta->sta_id, tid, txq_id, tid_data->state); 3114 old_state = tid_data->state; 3115 tid_data->state = IWL_AGG_OFF; 3116 mvmsta->agg_tids &= ~BIT(tid); 3117 spin_unlock_bh(&mvmsta->lock); 3118 3119 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3120 3121 if (old_state >= IWL_AGG_ON) { 3122 iwl_mvm_drain_sta(mvm, mvmsta, true); 3123 3124 if (iwl_mvm_has_new_tx_api(mvm)) { 3125 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3126 BIT(tid), 0)) 3127 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3128 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3129 } else { 3130 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3131 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3132 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3133 } 3134 3135 iwl_mvm_drain_sta(mvm, mvmsta, false); 3136 3137 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3138 } 3139 3140 return 0; 3141 } 3142 3143 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3144 { 3145 int i, max = -1, max_offs = -1; 3146 3147 lockdep_assert_held(&mvm->mutex); 3148 3149 /* Pick the unused key offset with the highest 'deleted' 3150 * counter. Every time a key is deleted, all the counters 3151 * are incremented and the one that was just deleted is 3152 * reset to zero. Thus, the highest counter is the one 3153 * that was deleted longest ago. Pick that one. 3154 */ 3155 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3156 if (test_bit(i, mvm->fw_key_table)) 3157 continue; 3158 if (mvm->fw_key_deleted[i] > max) { 3159 max = mvm->fw_key_deleted[i]; 3160 max_offs = i; 3161 } 3162 } 3163 3164 if (max_offs < 0) 3165 return STA_KEY_IDX_INVALID; 3166 3167 return max_offs; 3168 } 3169 3170 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3171 struct ieee80211_vif *vif, 3172 struct ieee80211_sta *sta) 3173 { 3174 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3175 3176 if (sta) 3177 return iwl_mvm_sta_from_mac80211(sta); 3178 3179 /* 3180 * The device expects GTKs for station interfaces to be 3181 * installed as GTKs for the AP station. If we have no 3182 * station ID, then use AP's station ID. 3183 */ 3184 if (vif->type == NL80211_IFTYPE_STATION && 3185 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3186 u8 sta_id = mvmvif->ap_sta_id; 3187 3188 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3189 lockdep_is_held(&mvm->mutex)); 3190 3191 /* 3192 * It is possible that the 'sta' parameter is NULL, 3193 * for example when a GTK is removed - the sta_id will then 3194 * be the AP ID, and no station was passed by mac80211. 3195 */ 3196 if (IS_ERR_OR_NULL(sta)) 3197 return NULL; 3198 3199 return iwl_mvm_sta_from_mac80211(sta); 3200 } 3201 3202 return NULL; 3203 } 3204 3205 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3206 u32 sta_id, 3207 struct ieee80211_key_conf *key, bool mcast, 3208 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3209 u8 key_offset, bool mfp) 3210 { 3211 union { 3212 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3213 struct iwl_mvm_add_sta_key_cmd cmd; 3214 } u = {}; 3215 __le16 key_flags; 3216 int ret; 3217 u32 status; 3218 u16 keyidx; 3219 u64 pn = 0; 3220 int i, size; 3221 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3222 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3223 3224 if (sta_id == IWL_MVM_INVALID_STA) 3225 return -EINVAL; 3226 3227 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3228 STA_KEY_FLG_KEYID_MSK; 3229 key_flags = cpu_to_le16(keyidx); 3230 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3231 3232 switch (key->cipher) { 3233 case WLAN_CIPHER_SUITE_TKIP: 3234 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3235 if (new_api) { 3236 memcpy((void *)&u.cmd.tx_mic_key, 3237 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3238 IWL_MIC_KEY_SIZE); 3239 3240 memcpy((void *)&u.cmd.rx_mic_key, 3241 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3242 IWL_MIC_KEY_SIZE); 3243 pn = atomic64_read(&key->tx_pn); 3244 3245 } else { 3246 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3247 for (i = 0; i < 5; i++) 3248 u.cmd_v1.tkip_rx_ttak[i] = 3249 cpu_to_le16(tkip_p1k[i]); 3250 } 3251 memcpy(u.cmd.common.key, key->key, key->keylen); 3252 break; 3253 case WLAN_CIPHER_SUITE_CCMP: 3254 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3255 memcpy(u.cmd.common.key, key->key, key->keylen); 3256 if (new_api) 3257 pn = atomic64_read(&key->tx_pn); 3258 break; 3259 case WLAN_CIPHER_SUITE_WEP104: 3260 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3261 /* fall through */ 3262 case WLAN_CIPHER_SUITE_WEP40: 3263 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3264 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3265 break; 3266 case WLAN_CIPHER_SUITE_GCMP_256: 3267 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3268 /* fall through */ 3269 case WLAN_CIPHER_SUITE_GCMP: 3270 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3271 memcpy(u.cmd.common.key, key->key, key->keylen); 3272 if (new_api) 3273 pn = atomic64_read(&key->tx_pn); 3274 break; 3275 default: 3276 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3277 memcpy(u.cmd.common.key, key->key, key->keylen); 3278 } 3279 3280 if (mcast) 3281 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3282 if (mfp) 3283 key_flags |= cpu_to_le16(STA_KEY_MFP); 3284 3285 u.cmd.common.key_offset = key_offset; 3286 u.cmd.common.key_flags = key_flags; 3287 u.cmd.common.sta_id = sta_id; 3288 3289 if (new_api) { 3290 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3291 size = sizeof(u.cmd); 3292 } else { 3293 size = sizeof(u.cmd_v1); 3294 } 3295 3296 status = ADD_STA_SUCCESS; 3297 if (cmd_flags & CMD_ASYNC) 3298 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3299 &u.cmd); 3300 else 3301 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3302 &u.cmd, &status); 3303 3304 switch (status) { 3305 case ADD_STA_SUCCESS: 3306 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3307 break; 3308 default: 3309 ret = -EIO; 3310 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3311 break; 3312 } 3313 3314 return ret; 3315 } 3316 3317 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3318 struct ieee80211_key_conf *keyconf, 3319 u8 sta_id, bool remove_key) 3320 { 3321 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3322 3323 /* verify the key details match the required command's expectations */ 3324 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3325 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3326 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3327 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3328 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3329 return -EINVAL; 3330 3331 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3332 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3333 return -EINVAL; 3334 3335 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3336 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3337 3338 if (remove_key) { 3339 /* This is a valid situation for IGTK */ 3340 if (sta_id == IWL_MVM_INVALID_STA) 3341 return 0; 3342 3343 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3344 } else { 3345 struct ieee80211_key_seq seq; 3346 const u8 *pn; 3347 3348 switch (keyconf->cipher) { 3349 case WLAN_CIPHER_SUITE_AES_CMAC: 3350 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3351 break; 3352 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3353 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3354 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3355 break; 3356 default: 3357 return -EINVAL; 3358 } 3359 3360 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3361 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3362 igtk_cmd.ctrl_flags |= 3363 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3364 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3365 pn = seq.aes_cmac.pn; 3366 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3367 ((u64) pn[4] << 8) | 3368 ((u64) pn[3] << 16) | 3369 ((u64) pn[2] << 24) | 3370 ((u64) pn[1] << 32) | 3371 ((u64) pn[0] << 40)); 3372 } 3373 3374 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3375 remove_key ? "removing" : "installing", 3376 igtk_cmd.sta_id); 3377 3378 if (!iwl_mvm_has_new_rx_api(mvm)) { 3379 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3380 .ctrl_flags = igtk_cmd.ctrl_flags, 3381 .key_id = igtk_cmd.key_id, 3382 .sta_id = igtk_cmd.sta_id, 3383 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3384 }; 3385 3386 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3387 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3388 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3389 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3390 } 3391 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3392 sizeof(igtk_cmd), &igtk_cmd); 3393 } 3394 3395 3396 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3397 struct ieee80211_vif *vif, 3398 struct ieee80211_sta *sta) 3399 { 3400 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3401 3402 if (sta) 3403 return sta->addr; 3404 3405 if (vif->type == NL80211_IFTYPE_STATION && 3406 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3407 u8 sta_id = mvmvif->ap_sta_id; 3408 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3409 lockdep_is_held(&mvm->mutex)); 3410 return sta->addr; 3411 } 3412 3413 3414 return NULL; 3415 } 3416 3417 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3418 struct ieee80211_vif *vif, 3419 struct ieee80211_sta *sta, 3420 struct ieee80211_key_conf *keyconf, 3421 u8 key_offset, 3422 bool mcast) 3423 { 3424 int ret; 3425 const u8 *addr; 3426 struct ieee80211_key_seq seq; 3427 u16 p1k[5]; 3428 u32 sta_id; 3429 bool mfp = false; 3430 3431 if (sta) { 3432 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3433 3434 sta_id = mvm_sta->sta_id; 3435 mfp = sta->mfp; 3436 } else if (vif->type == NL80211_IFTYPE_AP && 3437 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3438 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3439 3440 sta_id = mvmvif->mcast_sta.sta_id; 3441 } else { 3442 IWL_ERR(mvm, "Failed to find station id\n"); 3443 return -EINVAL; 3444 } 3445 3446 switch (keyconf->cipher) { 3447 case WLAN_CIPHER_SUITE_TKIP: 3448 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3449 /* get phase 1 key from mac80211 */ 3450 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3451 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3452 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3453 seq.tkip.iv32, p1k, 0, key_offset, 3454 mfp); 3455 break; 3456 case WLAN_CIPHER_SUITE_CCMP: 3457 case WLAN_CIPHER_SUITE_WEP40: 3458 case WLAN_CIPHER_SUITE_WEP104: 3459 case WLAN_CIPHER_SUITE_GCMP: 3460 case WLAN_CIPHER_SUITE_GCMP_256: 3461 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3462 0, NULL, 0, key_offset, mfp); 3463 break; 3464 default: 3465 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3466 0, NULL, 0, key_offset, mfp); 3467 } 3468 3469 return ret; 3470 } 3471 3472 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3473 struct ieee80211_vif *vif, 3474 struct ieee80211_sta *sta, 3475 struct ieee80211_key_conf *keyconf, 3476 u8 key_offset) 3477 { 3478 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3479 struct iwl_mvm_sta *mvm_sta; 3480 u8 sta_id = IWL_MVM_INVALID_STA; 3481 int ret; 3482 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3483 3484 lockdep_assert_held(&mvm->mutex); 3485 3486 if (vif->type != NL80211_IFTYPE_AP || 3487 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3488 /* Get the station id from the mvm local station table */ 3489 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3490 if (!mvm_sta) { 3491 IWL_ERR(mvm, "Failed to find station\n"); 3492 return -EINVAL; 3493 } 3494 sta_id = mvm_sta->sta_id; 3495 3496 /* 3497 * It is possible that the 'sta' parameter is NULL, and thus 3498 * there is a need to retrieve the sta from the local station 3499 * table. 3500 */ 3501 if (!sta) { 3502 sta = rcu_dereference_protected( 3503 mvm->fw_id_to_mac_id[sta_id], 3504 lockdep_is_held(&mvm->mutex)); 3505 if (IS_ERR_OR_NULL(sta)) { 3506 IWL_ERR(mvm, "Invalid station id\n"); 3507 return -EINVAL; 3508 } 3509 } 3510 3511 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3512 return -EINVAL; 3513 } else { 3514 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3515 3516 sta_id = mvmvif->mcast_sta.sta_id; 3517 } 3518 3519 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3520 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3521 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3522 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3523 goto end; 3524 } 3525 3526 /* If the key_offset is not pre-assigned, we need to find a 3527 * new offset to use. In normal cases, the offset is not 3528 * pre-assigned, but during HW_RESTART we want to reuse the 3529 * same indices, so we pass them when this function is called. 3530 * 3531 * In D3 entry, we need to hardcoded the indices (because the 3532 * firmware hardcodes the PTK offset to 0). In this case, we 3533 * need to make sure we don't overwrite the hw_key_idx in the 3534 * keyconf structure, because otherwise we cannot configure 3535 * the original ones back when resuming. 3536 */ 3537 if (key_offset == STA_KEY_IDX_INVALID) { 3538 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3539 if (key_offset == STA_KEY_IDX_INVALID) 3540 return -ENOSPC; 3541 keyconf->hw_key_idx = key_offset; 3542 } 3543 3544 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3545 if (ret) 3546 goto end; 3547 3548 /* 3549 * For WEP, the same key is used for multicast and unicast. Upload it 3550 * again, using the same key offset, and now pointing the other one 3551 * to the same key slot (offset). 3552 * If this fails, remove the original as well. 3553 */ 3554 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3555 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3556 sta) { 3557 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3558 key_offset, !mcast); 3559 if (ret) { 3560 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3561 goto end; 3562 } 3563 } 3564 3565 __set_bit(key_offset, mvm->fw_key_table); 3566 3567 end: 3568 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3569 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3570 sta ? sta->addr : zero_addr, ret); 3571 return ret; 3572 } 3573 3574 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3575 struct ieee80211_vif *vif, 3576 struct ieee80211_sta *sta, 3577 struct ieee80211_key_conf *keyconf) 3578 { 3579 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3580 struct iwl_mvm_sta *mvm_sta; 3581 u8 sta_id = IWL_MVM_INVALID_STA; 3582 int ret, i; 3583 3584 lockdep_assert_held(&mvm->mutex); 3585 3586 /* Get the station from the mvm local station table */ 3587 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3588 if (mvm_sta) 3589 sta_id = mvm_sta->sta_id; 3590 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3591 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3592 3593 3594 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3595 keyconf->keyidx, sta_id); 3596 3597 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3598 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3599 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3600 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3601 3602 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3603 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3604 keyconf->hw_key_idx); 3605 return -ENOENT; 3606 } 3607 3608 /* track which key was deleted last */ 3609 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3610 if (mvm->fw_key_deleted[i] < U8_MAX) 3611 mvm->fw_key_deleted[i]++; 3612 } 3613 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3614 3615 if (sta && !mvm_sta) { 3616 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3617 return 0; 3618 } 3619 3620 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3621 if (ret) 3622 return ret; 3623 3624 /* delete WEP key twice to get rid of (now useless) offset */ 3625 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3626 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3627 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3628 3629 return ret; 3630 } 3631 3632 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3633 struct ieee80211_vif *vif, 3634 struct ieee80211_key_conf *keyconf, 3635 struct ieee80211_sta *sta, u32 iv32, 3636 u16 *phase1key) 3637 { 3638 struct iwl_mvm_sta *mvm_sta; 3639 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3640 bool mfp = sta ? sta->mfp : false; 3641 3642 rcu_read_lock(); 3643 3644 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3645 if (WARN_ON_ONCE(!mvm_sta)) 3646 goto unlock; 3647 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3648 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3649 mfp); 3650 3651 unlock: 3652 rcu_read_unlock(); 3653 } 3654 3655 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3656 struct ieee80211_sta *sta) 3657 { 3658 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3659 struct iwl_mvm_add_sta_cmd cmd = { 3660 .add_modify = STA_MODE_MODIFY, 3661 .sta_id = mvmsta->sta_id, 3662 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3663 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3664 }; 3665 int ret; 3666 3667 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3668 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3669 if (ret) 3670 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3671 } 3672 3673 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3674 struct ieee80211_sta *sta, 3675 enum ieee80211_frame_release_type reason, 3676 u16 cnt, u16 tids, bool more_data, 3677 bool single_sta_queue) 3678 { 3679 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3680 struct iwl_mvm_add_sta_cmd cmd = { 3681 .add_modify = STA_MODE_MODIFY, 3682 .sta_id = mvmsta->sta_id, 3683 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3684 .sleep_tx_count = cpu_to_le16(cnt), 3685 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3686 }; 3687 int tid, ret; 3688 unsigned long _tids = tids; 3689 3690 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3691 * Note that this field is reserved and unused by firmware not 3692 * supporting GO uAPSD, so it's safe to always do this. 3693 */ 3694 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3695 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3696 3697 /* If we're releasing frames from aggregation or dqa queues then check 3698 * if all the queues that we're releasing frames from, combined, have: 3699 * - more frames than the service period, in which case more_data 3700 * needs to be set 3701 * - fewer than 'cnt' frames, in which case we need to adjust the 3702 * firmware command (but do that unconditionally) 3703 */ 3704 if (single_sta_queue) { 3705 int remaining = cnt; 3706 int sleep_tx_count; 3707 3708 spin_lock_bh(&mvmsta->lock); 3709 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3710 struct iwl_mvm_tid_data *tid_data; 3711 u16 n_queued; 3712 3713 tid_data = &mvmsta->tid_data[tid]; 3714 3715 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3716 if (n_queued > remaining) { 3717 more_data = true; 3718 remaining = 0; 3719 break; 3720 } 3721 remaining -= n_queued; 3722 } 3723 sleep_tx_count = cnt - remaining; 3724 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3725 mvmsta->sleep_tx_count = sleep_tx_count; 3726 spin_unlock_bh(&mvmsta->lock); 3727 3728 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3729 if (WARN_ON(cnt - remaining == 0)) { 3730 ieee80211_sta_eosp(sta); 3731 return; 3732 } 3733 } 3734 3735 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3736 if (more_data) 3737 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3738 3739 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3740 mvmsta->next_status_eosp = true; 3741 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3742 } else { 3743 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3744 } 3745 3746 /* block the Tx queues until the FW updated the sleep Tx count */ 3747 iwl_trans_block_txq_ptrs(mvm->trans, true); 3748 3749 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3750 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3751 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3752 if (ret) 3753 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3754 } 3755 3756 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3757 struct iwl_rx_cmd_buffer *rxb) 3758 { 3759 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3760 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3761 struct ieee80211_sta *sta; 3762 u32 sta_id = le32_to_cpu(notif->sta_id); 3763 3764 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3765 return; 3766 3767 rcu_read_lock(); 3768 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3769 if (!IS_ERR_OR_NULL(sta)) 3770 ieee80211_sta_eosp(sta); 3771 rcu_read_unlock(); 3772 } 3773 3774 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3775 struct iwl_mvm_sta *mvmsta, bool disable) 3776 { 3777 struct iwl_mvm_add_sta_cmd cmd = { 3778 .add_modify = STA_MODE_MODIFY, 3779 .sta_id = mvmsta->sta_id, 3780 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3781 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3782 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3783 }; 3784 int ret; 3785 3786 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3787 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3788 if (ret) 3789 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3790 } 3791 3792 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3793 struct ieee80211_sta *sta, 3794 bool disable) 3795 { 3796 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3797 3798 spin_lock_bh(&mvm_sta->lock); 3799 3800 if (mvm_sta->disable_tx == disable) { 3801 spin_unlock_bh(&mvm_sta->lock); 3802 return; 3803 } 3804 3805 mvm_sta->disable_tx = disable; 3806 3807 /* Tell mac80211 to start/stop queuing tx for this station */ 3808 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3809 3810 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3811 3812 spin_unlock_bh(&mvm_sta->lock); 3813 } 3814 3815 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3816 struct iwl_mvm_vif *mvmvif, 3817 struct iwl_mvm_int_sta *sta, 3818 bool disable) 3819 { 3820 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3821 struct iwl_mvm_add_sta_cmd cmd = { 3822 .add_modify = STA_MODE_MODIFY, 3823 .sta_id = sta->sta_id, 3824 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3825 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3826 .mac_id_n_color = cpu_to_le32(id), 3827 }; 3828 int ret; 3829 3830 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3831 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3832 if (ret) 3833 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3834 } 3835 3836 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3837 struct iwl_mvm_vif *mvmvif, 3838 bool disable) 3839 { 3840 struct ieee80211_sta *sta; 3841 struct iwl_mvm_sta *mvm_sta; 3842 int i; 3843 3844 lockdep_assert_held(&mvm->mutex); 3845 3846 /* Block/unblock all the stations of the given mvmvif */ 3847 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3848 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3849 lockdep_is_held(&mvm->mutex)); 3850 if (IS_ERR_OR_NULL(sta)) 3851 continue; 3852 3853 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3854 if (mvm_sta->mac_id_n_color != 3855 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3856 continue; 3857 3858 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3859 } 3860 3861 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3862 return; 3863 3864 /* Need to block/unblock also multicast station */ 3865 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3866 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3867 &mvmvif->mcast_sta, disable); 3868 3869 /* 3870 * Only unblock the broadcast station (FW blocks it for immediate 3871 * quiet, not the driver) 3872 */ 3873 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3874 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3875 &mvmvif->bcast_sta, disable); 3876 } 3877 3878 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3879 { 3880 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3881 struct iwl_mvm_sta *mvmsta; 3882 3883 rcu_read_lock(); 3884 3885 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3886 3887 if (!WARN_ON(!mvmsta)) 3888 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3889 3890 rcu_read_unlock(); 3891 } 3892 3893 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3894 { 3895 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3896 3897 /* 3898 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3899 * to align the wrap around of ssn so we compare relevant values. 3900 */ 3901 if (mvm->trans->trans_cfg->gen2) 3902 sn &= 0xff; 3903 3904 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3905 } 3906