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 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1193 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1194 alloc_for_sta); 1195 if (ret) { 1196 rcu_read_unlock(); 1197 return ret; 1198 } 1199 } 1200 1201 rcu_read_unlock(); 1202 1203 return free_queue; 1204 } 1205 1206 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1207 struct ieee80211_sta *sta, u8 ac, int tid) 1208 { 1209 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1210 struct iwl_trans_txq_scd_cfg cfg = { 1211 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1212 .sta_id = mvmsta->sta_id, 1213 .tid = tid, 1214 .frame_limit = IWL_FRAME_LIMIT, 1215 }; 1216 unsigned int wdg_timeout = 1217 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1218 int queue = -1; 1219 unsigned long disable_agg_tids = 0; 1220 enum iwl_mvm_agg_state queue_state; 1221 bool shared_queue = false, inc_ssn; 1222 int ssn; 1223 unsigned long tfd_queue_mask; 1224 int ret; 1225 1226 lockdep_assert_held(&mvm->mutex); 1227 1228 if (iwl_mvm_has_new_tx_api(mvm)) 1229 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1230 1231 spin_lock_bh(&mvmsta->lock); 1232 tfd_queue_mask = mvmsta->tfd_queue_msk; 1233 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1234 spin_unlock_bh(&mvmsta->lock); 1235 1236 if (tid == IWL_MAX_TID_COUNT) { 1237 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1238 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1239 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1240 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1241 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1242 queue); 1243 1244 /* If no such queue is found, we'll use a DATA queue instead */ 1245 } 1246 1247 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1248 (mvm->queue_info[mvmsta->reserved_queue].status == 1249 IWL_MVM_QUEUE_RESERVED)) { 1250 queue = mvmsta->reserved_queue; 1251 mvm->queue_info[queue].reserved = true; 1252 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1253 } 1254 1255 if (queue < 0) 1256 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1257 IWL_MVM_DQA_MIN_DATA_QUEUE, 1258 IWL_MVM_DQA_MAX_DATA_QUEUE); 1259 if (queue < 0) { 1260 /* try harder - perhaps kill an inactive queue */ 1261 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1262 } 1263 1264 /* No free queue - we'll have to share */ 1265 if (queue <= 0) { 1266 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1267 if (queue > 0) { 1268 shared_queue = true; 1269 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1270 } 1271 } 1272 1273 /* 1274 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1275 * to make sure no one else takes it. 1276 * This will allow avoiding re-acquiring the lock at the end of the 1277 * configuration. On error we'll mark it back as free. 1278 */ 1279 if (queue > 0 && !shared_queue) 1280 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1281 1282 /* This shouldn't happen - out of queues */ 1283 if (WARN_ON(queue <= 0)) { 1284 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1285 tid, cfg.sta_id); 1286 return queue; 1287 } 1288 1289 /* 1290 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1291 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1292 * as aggregatable. 1293 * Mark all DATA queues as allowing to be aggregated at some point 1294 */ 1295 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1296 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1297 1298 IWL_DEBUG_TX_QUEUES(mvm, 1299 "Allocating %squeue #%d to sta %d on tid %d\n", 1300 shared_queue ? "shared " : "", queue, 1301 mvmsta->sta_id, tid); 1302 1303 if (shared_queue) { 1304 /* Disable any open aggs on this queue */ 1305 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1306 1307 if (disable_agg_tids) { 1308 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1309 queue); 1310 iwl_mvm_invalidate_sta_queue(mvm, queue, 1311 disable_agg_tids, false); 1312 } 1313 } 1314 1315 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1316 1317 /* 1318 * Mark queue as shared in transport if shared 1319 * Note this has to be done after queue enablement because enablement 1320 * can also set this value, and there is no indication there to shared 1321 * queues 1322 */ 1323 if (shared_queue) 1324 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1325 1326 spin_lock_bh(&mvmsta->lock); 1327 /* 1328 * This looks racy, but it is not. We have only one packet for 1329 * this ra/tid in our Tx path since we stop the Qdisc when we 1330 * need to allocate a new TFD queue. 1331 */ 1332 if (inc_ssn) { 1333 mvmsta->tid_data[tid].seq_number += 0x10; 1334 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1335 } 1336 mvmsta->tid_data[tid].txq_id = queue; 1337 mvmsta->tfd_queue_msk |= BIT(queue); 1338 queue_state = mvmsta->tid_data[tid].state; 1339 1340 if (mvmsta->reserved_queue == queue) 1341 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1342 spin_unlock_bh(&mvmsta->lock); 1343 1344 if (!shared_queue) { 1345 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1346 if (ret) 1347 goto out_err; 1348 1349 /* If we need to re-enable aggregations... */ 1350 if (queue_state == IWL_AGG_ON) { 1351 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1352 if (ret) 1353 goto out_err; 1354 } 1355 } else { 1356 /* Redirect queue, if needed */ 1357 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1358 wdg_timeout, false, 1359 iwl_mvm_txq_from_tid(sta, tid)); 1360 if (ret) 1361 goto out_err; 1362 } 1363 1364 return 0; 1365 1366 out_err: 1367 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1368 1369 return ret; 1370 } 1371 1372 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1373 { 1374 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1375 add_stream_wk); 1376 1377 mutex_lock(&mvm->mutex); 1378 1379 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1380 1381 while (!list_empty(&mvm->add_stream_txqs)) { 1382 struct iwl_mvm_txq *mvmtxq; 1383 struct ieee80211_txq *txq; 1384 u8 tid; 1385 1386 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1387 struct iwl_mvm_txq, list); 1388 1389 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1390 drv_priv); 1391 tid = txq->tid; 1392 if (tid == IEEE80211_NUM_TIDS) 1393 tid = IWL_MAX_TID_COUNT; 1394 1395 /* 1396 * We can't really do much here, but if this fails we can't 1397 * transmit anyway - so just don't transmit the frame etc. 1398 * and let them back up ... we've tried our best to allocate 1399 * a queue in the function itself. 1400 */ 1401 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1402 list_del_init(&mvmtxq->list); 1403 continue; 1404 } 1405 1406 list_del_init(&mvmtxq->list); 1407 local_bh_disable(); 1408 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1409 local_bh_enable(); 1410 } 1411 1412 mutex_unlock(&mvm->mutex); 1413 } 1414 1415 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1416 struct ieee80211_sta *sta, 1417 enum nl80211_iftype vif_type) 1418 { 1419 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1420 int queue; 1421 1422 /* queue reserving is disabled on new TX path */ 1423 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1424 return 0; 1425 1426 /* run the general cleanup/unsharing of queues */ 1427 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1428 1429 /* Make sure we have free resources for this STA */ 1430 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1431 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1432 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1433 IWL_MVM_QUEUE_FREE)) 1434 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1435 else 1436 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1437 IWL_MVM_DQA_MIN_DATA_QUEUE, 1438 IWL_MVM_DQA_MAX_DATA_QUEUE); 1439 if (queue < 0) { 1440 /* try again - this time kick out a queue if needed */ 1441 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1442 if (queue < 0) { 1443 IWL_ERR(mvm, "No available queues for new station\n"); 1444 return -ENOSPC; 1445 } 1446 } 1447 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1448 1449 mvmsta->reserved_queue = queue; 1450 1451 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1452 queue, mvmsta->sta_id); 1453 1454 return 0; 1455 } 1456 1457 /* 1458 * In DQA mode, after a HW restart the queues should be allocated as before, in 1459 * order to avoid race conditions when there are shared queues. This function 1460 * does the re-mapping and queue allocation. 1461 * 1462 * Note that re-enabling aggregations isn't done in this function. 1463 */ 1464 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1465 struct ieee80211_sta *sta) 1466 { 1467 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1468 unsigned int wdg = 1469 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1470 int i; 1471 struct iwl_trans_txq_scd_cfg cfg = { 1472 .sta_id = mvm_sta->sta_id, 1473 .frame_limit = IWL_FRAME_LIMIT, 1474 }; 1475 1476 /* Make sure reserved queue is still marked as such (if allocated) */ 1477 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1478 mvm->queue_info[mvm_sta->reserved_queue].status = 1479 IWL_MVM_QUEUE_RESERVED; 1480 1481 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1482 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1483 int txq_id = tid_data->txq_id; 1484 int ac; 1485 1486 if (txq_id == IWL_MVM_INVALID_QUEUE) 1487 continue; 1488 1489 ac = tid_to_mac80211_ac[i]; 1490 1491 if (iwl_mvm_has_new_tx_api(mvm)) { 1492 IWL_DEBUG_TX_QUEUES(mvm, 1493 "Re-mapping sta %d tid %d\n", 1494 mvm_sta->sta_id, i); 1495 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1496 i, wdg); 1497 /* 1498 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1499 * to try again later, we have no other good way of 1500 * failing here 1501 */ 1502 if (txq_id < 0) 1503 txq_id = IWL_MVM_INVALID_QUEUE; 1504 tid_data->txq_id = txq_id; 1505 1506 /* 1507 * Since we don't set the seq number after reset, and HW 1508 * sets it now, FW reset will cause the seq num to start 1509 * at 0 again, so driver will need to update it 1510 * internally as well, so it keeps in sync with real val 1511 */ 1512 tid_data->seq_number = 0; 1513 } else { 1514 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1515 1516 cfg.tid = i; 1517 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1518 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1519 txq_id == 1520 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1521 1522 IWL_DEBUG_TX_QUEUES(mvm, 1523 "Re-mapping sta %d tid %d to queue %d\n", 1524 mvm_sta->sta_id, i, txq_id); 1525 1526 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1527 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1528 } 1529 } 1530 } 1531 1532 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1533 struct iwl_mvm_int_sta *sta, 1534 const u8 *addr, 1535 u16 mac_id, u16 color) 1536 { 1537 struct iwl_mvm_add_sta_cmd cmd; 1538 int ret; 1539 u32 status = ADD_STA_SUCCESS; 1540 1541 lockdep_assert_held(&mvm->mutex); 1542 1543 memset(&cmd, 0, sizeof(cmd)); 1544 cmd.sta_id = sta->sta_id; 1545 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1546 color)); 1547 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1548 cmd.station_type = sta->type; 1549 1550 if (!iwl_mvm_has_new_tx_api(mvm)) 1551 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1552 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1553 1554 if (addr) 1555 memcpy(cmd.addr, addr, ETH_ALEN); 1556 1557 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1558 iwl_mvm_add_sta_cmd_size(mvm), 1559 &cmd, &status); 1560 if (ret) 1561 return ret; 1562 1563 switch (status & IWL_ADD_STA_STATUS_MASK) { 1564 case ADD_STA_SUCCESS: 1565 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1566 return 0; 1567 default: 1568 ret = -EIO; 1569 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1570 status); 1571 break; 1572 } 1573 return ret; 1574 } 1575 1576 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1577 struct ieee80211_vif *vif, 1578 struct ieee80211_sta *sta) 1579 { 1580 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1581 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1582 struct iwl_mvm_rxq_dup_data *dup_data; 1583 int i, ret, sta_id; 1584 bool sta_update = false; 1585 unsigned int sta_flags = 0; 1586 1587 lockdep_assert_held(&mvm->mutex); 1588 1589 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1590 sta_id = iwl_mvm_find_free_sta_id(mvm, 1591 ieee80211_vif_type_p2p(vif)); 1592 else 1593 sta_id = mvm_sta->sta_id; 1594 1595 if (sta_id == IWL_MVM_INVALID_STA) 1596 return -ENOSPC; 1597 1598 spin_lock_init(&mvm_sta->lock); 1599 1600 /* if this is a HW restart re-alloc existing queues */ 1601 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1602 struct iwl_mvm_int_sta tmp_sta = { 1603 .sta_id = sta_id, 1604 .type = mvm_sta->sta_type, 1605 }; 1606 1607 /* 1608 * First add an empty station since allocating 1609 * a queue requires a valid station 1610 */ 1611 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1612 mvmvif->id, mvmvif->color); 1613 if (ret) 1614 goto err; 1615 1616 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1617 sta_update = true; 1618 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1619 goto update_fw; 1620 } 1621 1622 mvm_sta->sta_id = sta_id; 1623 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1624 mvmvif->color); 1625 mvm_sta->vif = vif; 1626 if (!mvm->trans->trans_cfg->gen2) 1627 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1628 else 1629 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1630 mvm_sta->tx_protection = 0; 1631 mvm_sta->tt_tx_protection = false; 1632 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1633 1634 /* HW restart, don't assume the memory has been zeroed */ 1635 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1636 mvm_sta->tfd_queue_msk = 0; 1637 1638 /* for HW restart - reset everything but the sequence number */ 1639 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1640 u16 seq = mvm_sta->tid_data[i].seq_number; 1641 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1642 mvm_sta->tid_data[i].seq_number = seq; 1643 1644 /* 1645 * Mark all queues for this STA as unallocated and defer TX 1646 * frames until the queue is allocated 1647 */ 1648 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1649 } 1650 1651 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1652 struct iwl_mvm_txq *mvmtxq = 1653 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1654 1655 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1656 INIT_LIST_HEAD(&mvmtxq->list); 1657 atomic_set(&mvmtxq->tx_request, 0); 1658 } 1659 1660 mvm_sta->agg_tids = 0; 1661 1662 if (iwl_mvm_has_new_rx_api(mvm) && 1663 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1664 int q; 1665 1666 dup_data = kcalloc(mvm->trans->num_rx_queues, 1667 sizeof(*dup_data), GFP_KERNEL); 1668 if (!dup_data) 1669 return -ENOMEM; 1670 /* 1671 * Initialize all the last_seq values to 0xffff which can never 1672 * compare equal to the frame's seq_ctrl in the check in 1673 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1674 * number and fragmented packets don't reach that function. 1675 * 1676 * This thus allows receiving a packet with seqno 0 and the 1677 * retry bit set as the very first packet on a new TID. 1678 */ 1679 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1680 memset(dup_data[q].last_seq, 0xff, 1681 sizeof(dup_data[q].last_seq)); 1682 mvm_sta->dup_data = dup_data; 1683 } 1684 1685 if (!iwl_mvm_has_new_tx_api(mvm)) { 1686 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1687 ieee80211_vif_type_p2p(vif)); 1688 if (ret) 1689 goto err; 1690 } 1691 1692 /* 1693 * if rs is registered with mac80211, then "add station" will be handled 1694 * via the corresponding ops, otherwise need to notify rate scaling here 1695 */ 1696 if (iwl_mvm_has_tlc_offload(mvm)) 1697 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1698 else 1699 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1700 1701 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1702 1703 update_fw: 1704 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1705 if (ret) 1706 goto err; 1707 1708 if (vif->type == NL80211_IFTYPE_STATION) { 1709 if (!sta->tdls) { 1710 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1711 mvmvif->ap_sta_id = sta_id; 1712 } else { 1713 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1714 } 1715 } 1716 1717 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1718 1719 return 0; 1720 1721 err: 1722 return ret; 1723 } 1724 1725 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1726 bool drain) 1727 { 1728 struct iwl_mvm_add_sta_cmd cmd = {}; 1729 int ret; 1730 u32 status; 1731 1732 lockdep_assert_held(&mvm->mutex); 1733 1734 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1735 cmd.sta_id = mvmsta->sta_id; 1736 cmd.add_modify = STA_MODE_MODIFY; 1737 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1738 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1739 1740 status = ADD_STA_SUCCESS; 1741 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1742 iwl_mvm_add_sta_cmd_size(mvm), 1743 &cmd, &status); 1744 if (ret) 1745 return ret; 1746 1747 switch (status & IWL_ADD_STA_STATUS_MASK) { 1748 case ADD_STA_SUCCESS: 1749 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1750 mvmsta->sta_id); 1751 break; 1752 default: 1753 ret = -EIO; 1754 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1755 mvmsta->sta_id); 1756 break; 1757 } 1758 1759 return ret; 1760 } 1761 1762 /* 1763 * Remove a station from the FW table. Before sending the command to remove 1764 * the station validate that the station is indeed known to the driver (sanity 1765 * only). 1766 */ 1767 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1768 { 1769 struct ieee80211_sta *sta; 1770 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1771 .sta_id = sta_id, 1772 }; 1773 int ret; 1774 1775 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1776 lockdep_is_held(&mvm->mutex)); 1777 1778 /* Note: internal stations are marked as error values */ 1779 if (!sta) { 1780 IWL_ERR(mvm, "Invalid station id\n"); 1781 return -EINVAL; 1782 } 1783 1784 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1785 sizeof(rm_sta_cmd), &rm_sta_cmd); 1786 if (ret) { 1787 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1788 return ret; 1789 } 1790 1791 return 0; 1792 } 1793 1794 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1795 struct ieee80211_vif *vif, 1796 struct ieee80211_sta *sta) 1797 { 1798 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1799 int i; 1800 1801 lockdep_assert_held(&mvm->mutex); 1802 1803 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1804 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1805 continue; 1806 1807 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1808 0); 1809 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1810 } 1811 1812 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1813 struct iwl_mvm_txq *mvmtxq = 1814 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1815 1816 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1817 } 1818 } 1819 1820 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1821 struct iwl_mvm_sta *mvm_sta) 1822 { 1823 int i; 1824 1825 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1826 u16 txq_id; 1827 int ret; 1828 1829 spin_lock_bh(&mvm_sta->lock); 1830 txq_id = mvm_sta->tid_data[i].txq_id; 1831 spin_unlock_bh(&mvm_sta->lock); 1832 1833 if (txq_id == IWL_MVM_INVALID_QUEUE) 1834 continue; 1835 1836 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1837 if (ret) 1838 return ret; 1839 } 1840 1841 return 0; 1842 } 1843 1844 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1845 struct ieee80211_vif *vif, 1846 struct ieee80211_sta *sta) 1847 { 1848 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1849 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1850 u8 sta_id = mvm_sta->sta_id; 1851 int ret; 1852 1853 lockdep_assert_held(&mvm->mutex); 1854 1855 if (iwl_mvm_has_new_rx_api(mvm)) 1856 kfree(mvm_sta->dup_data); 1857 1858 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1859 if (ret) 1860 return ret; 1861 1862 /* flush its queues here since we are freeing mvm_sta */ 1863 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1864 if (ret) 1865 return ret; 1866 if (iwl_mvm_has_new_tx_api(mvm)) { 1867 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1868 } else { 1869 u32 q_mask = mvm_sta->tfd_queue_msk; 1870 1871 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1872 q_mask); 1873 } 1874 if (ret) 1875 return ret; 1876 1877 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1878 1879 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1880 1881 /* If there is a TXQ still marked as reserved - free it */ 1882 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1883 u8 reserved_txq = mvm_sta->reserved_queue; 1884 enum iwl_mvm_queue_status *status; 1885 1886 /* 1887 * If no traffic has gone through the reserved TXQ - it 1888 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1889 * should be manually marked as free again 1890 */ 1891 status = &mvm->queue_info[reserved_txq].status; 1892 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1893 (*status != IWL_MVM_QUEUE_FREE), 1894 "sta_id %d reserved txq %d status %d", 1895 sta_id, reserved_txq, *status)) 1896 return -EINVAL; 1897 1898 *status = IWL_MVM_QUEUE_FREE; 1899 } 1900 1901 if (vif->type == NL80211_IFTYPE_STATION && 1902 mvmvif->ap_sta_id == sta_id) { 1903 /* if associated - we can't remove the AP STA now */ 1904 if (vif->bss_conf.assoc) 1905 return ret; 1906 1907 /* unassoc - go ahead - remove the AP STA now */ 1908 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1909 } 1910 1911 /* 1912 * This shouldn't happen - the TDLS channel switch should be canceled 1913 * before the STA is removed. 1914 */ 1915 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1916 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1917 cancel_delayed_work(&mvm->tdls_cs.dwork); 1918 } 1919 1920 /* 1921 * Make sure that the tx response code sees the station as -EBUSY and 1922 * calls the drain worker. 1923 */ 1924 spin_lock_bh(&mvm_sta->lock); 1925 spin_unlock_bh(&mvm_sta->lock); 1926 1927 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1928 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1929 1930 return ret; 1931 } 1932 1933 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1934 struct ieee80211_vif *vif, 1935 u8 sta_id) 1936 { 1937 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1938 1939 lockdep_assert_held(&mvm->mutex); 1940 1941 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1942 return ret; 1943 } 1944 1945 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1946 struct iwl_mvm_int_sta *sta, 1947 u32 qmask, enum nl80211_iftype iftype, 1948 enum iwl_sta_type type) 1949 { 1950 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1951 sta->sta_id == IWL_MVM_INVALID_STA) { 1952 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1953 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1954 return -ENOSPC; 1955 } 1956 1957 sta->tfd_queue_msk = qmask; 1958 sta->type = type; 1959 1960 /* put a non-NULL value so iterating over the stations won't stop */ 1961 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1962 return 0; 1963 } 1964 1965 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1966 { 1967 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1968 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1969 sta->sta_id = IWL_MVM_INVALID_STA; 1970 } 1971 1972 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 1973 u8 sta_id, u8 fifo) 1974 { 1975 unsigned int wdg_timeout = 1976 mvm->trans->trans_cfg->base_params->wd_timeout; 1977 struct iwl_trans_txq_scd_cfg cfg = { 1978 .fifo = fifo, 1979 .sta_id = sta_id, 1980 .tid = IWL_MAX_TID_COUNT, 1981 .aggregate = false, 1982 .frame_limit = IWL_FRAME_LIMIT, 1983 }; 1984 1985 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1986 1987 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 1988 } 1989 1990 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 1991 { 1992 unsigned int wdg_timeout = 1993 mvm->trans->trans_cfg->base_params->wd_timeout; 1994 1995 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1996 1997 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 1998 wdg_timeout); 1999 } 2000 2001 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2002 int maccolor, 2003 struct iwl_mvm_int_sta *sta, 2004 u16 *queue, int fifo) 2005 { 2006 int ret; 2007 2008 /* Map queue to fifo - needs to happen before adding station */ 2009 if (!iwl_mvm_has_new_tx_api(mvm)) 2010 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2011 2012 ret = iwl_mvm_add_int_sta_common(mvm, sta, NULL, macidx, maccolor); 2013 if (ret) { 2014 if (!iwl_mvm_has_new_tx_api(mvm)) 2015 iwl_mvm_disable_txq(mvm, NULL, *queue, 2016 IWL_MAX_TID_COUNT, 0); 2017 return ret; 2018 } 2019 2020 /* 2021 * For 22000 firmware and on we cannot add queue to a station unknown 2022 * to firmware so enable queue here - after the station was added 2023 */ 2024 if (iwl_mvm_has_new_tx_api(mvm)) { 2025 int txq; 2026 2027 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2028 if (txq < 0) { 2029 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2030 return txq; 2031 } 2032 2033 *queue = txq; 2034 } 2035 2036 return 0; 2037 } 2038 2039 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 2040 { 2041 int ret; 2042 2043 lockdep_assert_held(&mvm->mutex); 2044 2045 /* Allocate aux station and assign to it the aux queue */ 2046 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2047 NL80211_IFTYPE_UNSPECIFIED, 2048 IWL_STA_AUX_ACTIVITY); 2049 if (ret) 2050 return ret; 2051 2052 ret = iwl_mvm_add_int_sta_with_queue(mvm, MAC_INDEX_AUX, 0, 2053 &mvm->aux_sta, &mvm->aux_queue, 2054 IWL_MVM_TX_FIFO_MCAST); 2055 if (ret) { 2056 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2057 return ret; 2058 } 2059 2060 return 0; 2061 } 2062 2063 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2064 { 2065 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2066 2067 lockdep_assert_held(&mvm->mutex); 2068 2069 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2070 &mvm->snif_sta, &mvm->snif_queue, 2071 IWL_MVM_TX_FIFO_BE); 2072 } 2073 2074 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2075 { 2076 int ret; 2077 2078 lockdep_assert_held(&mvm->mutex); 2079 2080 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2081 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2082 if (ret) 2083 IWL_WARN(mvm, "Failed sending remove station\n"); 2084 2085 return ret; 2086 } 2087 2088 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2089 { 2090 int ret; 2091 2092 lockdep_assert_held(&mvm->mutex); 2093 2094 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_queue, IWL_MAX_TID_COUNT, 0); 2095 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2096 if (ret) 2097 IWL_WARN(mvm, "Failed sending remove station\n"); 2098 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2099 2100 return ret; 2101 } 2102 2103 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2104 { 2105 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2106 } 2107 2108 /* 2109 * Send the add station command for the vif's broadcast station. 2110 * Assumes that the station was already allocated. 2111 * 2112 * @mvm: the mvm component 2113 * @vif: the interface to which the broadcast station is added 2114 * @bsta: the broadcast station to add. 2115 */ 2116 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2117 { 2118 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2119 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2120 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2121 const u8 *baddr = _baddr; 2122 int queue; 2123 int ret; 2124 unsigned int wdg_timeout = 2125 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2126 struct iwl_trans_txq_scd_cfg cfg = { 2127 .fifo = IWL_MVM_TX_FIFO_VO, 2128 .sta_id = mvmvif->bcast_sta.sta_id, 2129 .tid = IWL_MAX_TID_COUNT, 2130 .aggregate = false, 2131 .frame_limit = IWL_FRAME_LIMIT, 2132 }; 2133 2134 lockdep_assert_held(&mvm->mutex); 2135 2136 if (!iwl_mvm_has_new_tx_api(mvm)) { 2137 if (vif->type == NL80211_IFTYPE_AP || 2138 vif->type == NL80211_IFTYPE_ADHOC) { 2139 queue = mvm->probe_queue; 2140 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2141 queue = mvm->p2p_dev_queue; 2142 } else { 2143 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2144 return -EINVAL; 2145 } 2146 2147 bsta->tfd_queue_msk |= BIT(queue); 2148 2149 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2150 } 2151 2152 if (vif->type == NL80211_IFTYPE_ADHOC) 2153 baddr = vif->bss_conf.bssid; 2154 2155 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2156 return -ENOSPC; 2157 2158 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2159 mvmvif->id, mvmvif->color); 2160 if (ret) 2161 return ret; 2162 2163 /* 2164 * For 22000 firmware and on we cannot add queue to a station unknown 2165 * to firmware so enable queue here - after the station was added 2166 */ 2167 if (iwl_mvm_has_new_tx_api(mvm)) { 2168 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2169 IWL_MAX_TID_COUNT, 2170 wdg_timeout); 2171 if (queue < 0) { 2172 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2173 return queue; 2174 } 2175 2176 if (vif->type == NL80211_IFTYPE_AP || 2177 vif->type == NL80211_IFTYPE_ADHOC) 2178 mvm->probe_queue = queue; 2179 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2180 mvm->p2p_dev_queue = queue; 2181 } 2182 2183 return 0; 2184 } 2185 2186 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2187 struct ieee80211_vif *vif) 2188 { 2189 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2190 int queue; 2191 2192 lockdep_assert_held(&mvm->mutex); 2193 2194 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2195 2196 switch (vif->type) { 2197 case NL80211_IFTYPE_AP: 2198 case NL80211_IFTYPE_ADHOC: 2199 queue = mvm->probe_queue; 2200 break; 2201 case NL80211_IFTYPE_P2P_DEVICE: 2202 queue = mvm->p2p_dev_queue; 2203 break; 2204 default: 2205 WARN(1, "Can't free bcast queue on vif type %d\n", 2206 vif->type); 2207 return; 2208 } 2209 2210 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2211 if (iwl_mvm_has_new_tx_api(mvm)) 2212 return; 2213 2214 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2215 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2216 } 2217 2218 /* Send the FW a request to remove the station from it's internal data 2219 * structures, but DO NOT remove the entry from the local data structures. */ 2220 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2221 { 2222 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2223 int ret; 2224 2225 lockdep_assert_held(&mvm->mutex); 2226 2227 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2228 2229 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2230 if (ret) 2231 IWL_WARN(mvm, "Failed sending remove station\n"); 2232 return ret; 2233 } 2234 2235 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2236 { 2237 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2238 2239 lockdep_assert_held(&mvm->mutex); 2240 2241 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2242 ieee80211_vif_type_p2p(vif), 2243 IWL_STA_GENERAL_PURPOSE); 2244 } 2245 2246 /* Allocate a new station entry for the broadcast station to the given vif, 2247 * and send it to the FW. 2248 * Note that each P2P mac should have its own broadcast station. 2249 * 2250 * @mvm: the mvm component 2251 * @vif: the interface to which the broadcast station is added 2252 * @bsta: the broadcast station to add. */ 2253 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2254 { 2255 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2256 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2257 int ret; 2258 2259 lockdep_assert_held(&mvm->mutex); 2260 2261 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2262 if (ret) 2263 return ret; 2264 2265 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2266 2267 if (ret) 2268 iwl_mvm_dealloc_int_sta(mvm, bsta); 2269 2270 return ret; 2271 } 2272 2273 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2274 { 2275 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2276 2277 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2278 } 2279 2280 /* 2281 * Send the FW a request to remove the station from it's internal data 2282 * structures, and in addition remove it from the local data structure. 2283 */ 2284 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2285 { 2286 int ret; 2287 2288 lockdep_assert_held(&mvm->mutex); 2289 2290 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2291 2292 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2293 2294 return ret; 2295 } 2296 2297 /* 2298 * Allocate a new station entry for the multicast station to the given vif, 2299 * and send it to the FW. 2300 * Note that each AP/GO mac should have its own multicast station. 2301 * 2302 * @mvm: the mvm component 2303 * @vif: the interface to which the multicast station is added 2304 */ 2305 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2306 { 2307 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2308 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2309 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2310 const u8 *maddr = _maddr; 2311 struct iwl_trans_txq_scd_cfg cfg = { 2312 .fifo = vif->type == NL80211_IFTYPE_AP ? 2313 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2314 .sta_id = msta->sta_id, 2315 .tid = 0, 2316 .aggregate = false, 2317 .frame_limit = IWL_FRAME_LIMIT, 2318 }; 2319 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2320 int ret; 2321 2322 lockdep_assert_held(&mvm->mutex); 2323 2324 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2325 vif->type != NL80211_IFTYPE_ADHOC)) 2326 return -ENOTSUPP; 2327 2328 /* 2329 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2330 * invalid, so make sure we use the queue we want. 2331 * Note that this is done here as we want to avoid making DQA 2332 * changes in mac80211 layer. 2333 */ 2334 if (vif->type == NL80211_IFTYPE_ADHOC) 2335 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2336 2337 /* 2338 * While in previous FWs we had to exclude cab queue from TFD queue 2339 * mask, now it is needed as any other queue. 2340 */ 2341 if (!iwl_mvm_has_new_tx_api(mvm) && 2342 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2343 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2344 timeout); 2345 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2346 } 2347 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2348 mvmvif->id, mvmvif->color); 2349 if (ret) 2350 goto err; 2351 2352 /* 2353 * Enable cab queue after the ADD_STA command is sent. 2354 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2355 * command with unknown station id, and for FW that doesn't support 2356 * station API since the cab queue is not included in the 2357 * tfd_queue_mask. 2358 */ 2359 if (iwl_mvm_has_new_tx_api(mvm)) { 2360 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2361 0, 2362 timeout); 2363 if (queue < 0) { 2364 ret = queue; 2365 goto err; 2366 } 2367 mvmvif->cab_queue = queue; 2368 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2369 IWL_UCODE_TLV_API_STA_TYPE)) 2370 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2371 timeout); 2372 2373 return 0; 2374 err: 2375 iwl_mvm_dealloc_int_sta(mvm, msta); 2376 return ret; 2377 } 2378 2379 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2380 struct ieee80211_key_conf *keyconf, 2381 bool mcast) 2382 { 2383 union { 2384 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2385 struct iwl_mvm_add_sta_key_cmd cmd; 2386 } u = {}; 2387 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2388 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2389 __le16 key_flags; 2390 int ret, size; 2391 u32 status; 2392 2393 /* This is a valid situation for GTK removal */ 2394 if (sta_id == IWL_MVM_INVALID_STA) 2395 return 0; 2396 2397 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2398 STA_KEY_FLG_KEYID_MSK); 2399 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2400 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2401 2402 if (mcast) 2403 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2404 2405 /* 2406 * The fields assigned here are in the same location at the start 2407 * of the command, so we can do this union trick. 2408 */ 2409 u.cmd.common.key_flags = key_flags; 2410 u.cmd.common.key_offset = keyconf->hw_key_idx; 2411 u.cmd.common.sta_id = sta_id; 2412 2413 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2414 2415 status = ADD_STA_SUCCESS; 2416 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2417 &status); 2418 2419 switch (status) { 2420 case ADD_STA_SUCCESS: 2421 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2422 break; 2423 default: 2424 ret = -EIO; 2425 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2426 break; 2427 } 2428 2429 return ret; 2430 } 2431 2432 /* 2433 * Send the FW a request to remove the station from it's internal data 2434 * structures, and in addition remove it from the local data structure. 2435 */ 2436 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2437 { 2438 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2439 int ret; 2440 2441 lockdep_assert_held(&mvm->mutex); 2442 2443 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2444 2445 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2446 2447 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2448 if (ret) 2449 IWL_WARN(mvm, "Failed sending remove station\n"); 2450 2451 return ret; 2452 } 2453 2454 #define IWL_MAX_RX_BA_SESSIONS 16 2455 2456 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2457 { 2458 struct iwl_mvm_rss_sync_notif notif = { 2459 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2460 .metadata.sync = 1, 2461 .delba.baid = baid, 2462 }; 2463 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2464 }; 2465 2466 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2467 struct iwl_mvm_baid_data *data) 2468 { 2469 int i; 2470 2471 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2472 2473 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2474 int j; 2475 struct iwl_mvm_reorder_buffer *reorder_buf = 2476 &data->reorder_buf[i]; 2477 struct iwl_mvm_reorder_buf_entry *entries = 2478 &data->entries[i * data->entries_per_queue]; 2479 2480 spin_lock_bh(&reorder_buf->lock); 2481 if (likely(!reorder_buf->num_stored)) { 2482 spin_unlock_bh(&reorder_buf->lock); 2483 continue; 2484 } 2485 2486 /* 2487 * This shouldn't happen in regular DELBA since the internal 2488 * delBA notification should trigger a release of all frames in 2489 * the reorder buffer. 2490 */ 2491 WARN_ON(1); 2492 2493 for (j = 0; j < reorder_buf->buf_size; j++) 2494 __skb_queue_purge(&entries[j].e.frames); 2495 /* 2496 * Prevent timer re-arm. This prevents a very far fetched case 2497 * where we timed out on the notification. There may be prior 2498 * RX frames pending in the RX queue before the notification 2499 * that might get processed between now and the actual deletion 2500 * and we would re-arm the timer although we are deleting the 2501 * reorder buffer. 2502 */ 2503 reorder_buf->removed = true; 2504 spin_unlock_bh(&reorder_buf->lock); 2505 del_timer_sync(&reorder_buf->reorder_timer); 2506 } 2507 } 2508 2509 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2510 struct iwl_mvm_baid_data *data, 2511 u16 ssn, u16 buf_size) 2512 { 2513 int i; 2514 2515 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2516 struct iwl_mvm_reorder_buffer *reorder_buf = 2517 &data->reorder_buf[i]; 2518 struct iwl_mvm_reorder_buf_entry *entries = 2519 &data->entries[i * data->entries_per_queue]; 2520 int j; 2521 2522 reorder_buf->num_stored = 0; 2523 reorder_buf->head_sn = ssn; 2524 reorder_buf->buf_size = buf_size; 2525 /* rx reorder timer */ 2526 timer_setup(&reorder_buf->reorder_timer, 2527 iwl_mvm_reorder_timer_expired, 0); 2528 spin_lock_init(&reorder_buf->lock); 2529 reorder_buf->mvm = mvm; 2530 reorder_buf->queue = i; 2531 reorder_buf->valid = false; 2532 for (j = 0; j < reorder_buf->buf_size; j++) 2533 __skb_queue_head_init(&entries[j].e.frames); 2534 } 2535 } 2536 2537 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2538 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2539 { 2540 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2541 struct iwl_mvm_add_sta_cmd cmd = {}; 2542 struct iwl_mvm_baid_data *baid_data = NULL; 2543 int ret; 2544 u32 status; 2545 2546 lockdep_assert_held(&mvm->mutex); 2547 2548 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2549 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2550 return -ENOSPC; 2551 } 2552 2553 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2554 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2555 2556 /* sparse doesn't like the __align() so don't check */ 2557 #ifndef __CHECKER__ 2558 /* 2559 * The division below will be OK if either the cache line size 2560 * can be divided by the entry size (ALIGN will round up) or if 2561 * if the entry size can be divided by the cache line size, in 2562 * which case the ALIGN() will do nothing. 2563 */ 2564 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2565 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2566 #endif 2567 2568 /* 2569 * Upward align the reorder buffer size to fill an entire cache 2570 * line for each queue, to avoid sharing cache lines between 2571 * different queues. 2572 */ 2573 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2574 2575 /* 2576 * Allocate here so if allocation fails we can bail out early 2577 * before starting the BA session in the firmware 2578 */ 2579 baid_data = kzalloc(sizeof(*baid_data) + 2580 mvm->trans->num_rx_queues * 2581 reorder_buf_size, 2582 GFP_KERNEL); 2583 if (!baid_data) 2584 return -ENOMEM; 2585 2586 /* 2587 * This division is why we need the above BUILD_BUG_ON(), 2588 * if that doesn't hold then this will not be right. 2589 */ 2590 baid_data->entries_per_queue = 2591 reorder_buf_size / sizeof(baid_data->entries[0]); 2592 } 2593 2594 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2595 cmd.sta_id = mvm_sta->sta_id; 2596 cmd.add_modify = STA_MODE_MODIFY; 2597 if (start) { 2598 cmd.add_immediate_ba_tid = (u8) tid; 2599 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2600 cmd.rx_ba_window = cpu_to_le16(buf_size); 2601 } else { 2602 cmd.remove_immediate_ba_tid = (u8) tid; 2603 } 2604 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2605 STA_MODIFY_REMOVE_BA_TID; 2606 2607 status = ADD_STA_SUCCESS; 2608 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2609 iwl_mvm_add_sta_cmd_size(mvm), 2610 &cmd, &status); 2611 if (ret) 2612 goto out_free; 2613 2614 switch (status & IWL_ADD_STA_STATUS_MASK) { 2615 case ADD_STA_SUCCESS: 2616 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2617 start ? "start" : "stopp"); 2618 break; 2619 case ADD_STA_IMMEDIATE_BA_FAILURE: 2620 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2621 ret = -ENOSPC; 2622 break; 2623 default: 2624 ret = -EIO; 2625 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2626 start ? "start" : "stopp", status); 2627 break; 2628 } 2629 2630 if (ret) 2631 goto out_free; 2632 2633 if (start) { 2634 u8 baid; 2635 2636 mvm->rx_ba_sessions++; 2637 2638 if (!iwl_mvm_has_new_rx_api(mvm)) 2639 return 0; 2640 2641 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2642 ret = -EINVAL; 2643 goto out_free; 2644 } 2645 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2646 IWL_ADD_STA_BAID_SHIFT); 2647 baid_data->baid = baid; 2648 baid_data->timeout = timeout; 2649 baid_data->last_rx = jiffies; 2650 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2651 timer_setup(&baid_data->session_timer, 2652 iwl_mvm_rx_agg_session_expired, 0); 2653 baid_data->mvm = mvm; 2654 baid_data->tid = tid; 2655 baid_data->sta_id = mvm_sta->sta_id; 2656 2657 mvm_sta->tid_to_baid[tid] = baid; 2658 if (timeout) 2659 mod_timer(&baid_data->session_timer, 2660 TU_TO_EXP_TIME(timeout * 2)); 2661 2662 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2663 /* 2664 * protect the BA data with RCU to cover a case where our 2665 * internal RX sync mechanism will timeout (not that it's 2666 * supposed to happen) and we will free the session data while 2667 * RX is being processed in parallel 2668 */ 2669 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2670 mvm_sta->sta_id, tid, baid); 2671 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2672 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2673 } else { 2674 u8 baid = mvm_sta->tid_to_baid[tid]; 2675 2676 if (mvm->rx_ba_sessions > 0) 2677 /* check that restart flow didn't zero the counter */ 2678 mvm->rx_ba_sessions--; 2679 if (!iwl_mvm_has_new_rx_api(mvm)) 2680 return 0; 2681 2682 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2683 return -EINVAL; 2684 2685 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2686 if (WARN_ON(!baid_data)) 2687 return -EINVAL; 2688 2689 /* synchronize all rx queues so we can safely delete */ 2690 iwl_mvm_free_reorder(mvm, baid_data); 2691 del_timer_sync(&baid_data->session_timer); 2692 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2693 kfree_rcu(baid_data, rcu_head); 2694 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2695 } 2696 return 0; 2697 2698 out_free: 2699 kfree(baid_data); 2700 return ret; 2701 } 2702 2703 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2704 int tid, u8 queue, bool start) 2705 { 2706 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2707 struct iwl_mvm_add_sta_cmd cmd = {}; 2708 int ret; 2709 u32 status; 2710 2711 lockdep_assert_held(&mvm->mutex); 2712 2713 if (start) { 2714 mvm_sta->tfd_queue_msk |= BIT(queue); 2715 mvm_sta->tid_disable_agg &= ~BIT(tid); 2716 } else { 2717 /* In DQA-mode the queue isn't removed on agg termination */ 2718 mvm_sta->tid_disable_agg |= BIT(tid); 2719 } 2720 2721 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2722 cmd.sta_id = mvm_sta->sta_id; 2723 cmd.add_modify = STA_MODE_MODIFY; 2724 if (!iwl_mvm_has_new_tx_api(mvm)) 2725 cmd.modify_mask = STA_MODIFY_QUEUES; 2726 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2727 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2728 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2729 2730 status = ADD_STA_SUCCESS; 2731 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2732 iwl_mvm_add_sta_cmd_size(mvm), 2733 &cmd, &status); 2734 if (ret) 2735 return ret; 2736 2737 switch (status & IWL_ADD_STA_STATUS_MASK) { 2738 case ADD_STA_SUCCESS: 2739 break; 2740 default: 2741 ret = -EIO; 2742 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2743 start ? "start" : "stopp", status); 2744 break; 2745 } 2746 2747 return ret; 2748 } 2749 2750 const u8 tid_to_mac80211_ac[] = { 2751 IEEE80211_AC_BE, 2752 IEEE80211_AC_BK, 2753 IEEE80211_AC_BK, 2754 IEEE80211_AC_BE, 2755 IEEE80211_AC_VI, 2756 IEEE80211_AC_VI, 2757 IEEE80211_AC_VO, 2758 IEEE80211_AC_VO, 2759 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2760 }; 2761 2762 static const u8 tid_to_ucode_ac[] = { 2763 AC_BE, 2764 AC_BK, 2765 AC_BK, 2766 AC_BE, 2767 AC_VI, 2768 AC_VI, 2769 AC_VO, 2770 AC_VO, 2771 }; 2772 2773 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2774 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2775 { 2776 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2777 struct iwl_mvm_tid_data *tid_data; 2778 u16 normalized_ssn; 2779 u16 txq_id; 2780 int ret; 2781 2782 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2783 return -EINVAL; 2784 2785 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2786 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2787 IWL_ERR(mvm, 2788 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2789 mvmsta->tid_data[tid].state); 2790 return -ENXIO; 2791 } 2792 2793 lockdep_assert_held(&mvm->mutex); 2794 2795 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2796 iwl_mvm_has_new_tx_api(mvm)) { 2797 u8 ac = tid_to_mac80211_ac[tid]; 2798 2799 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2800 if (ret) 2801 return ret; 2802 } 2803 2804 spin_lock_bh(&mvmsta->lock); 2805 2806 /* 2807 * Note the possible cases: 2808 * 1. An enabled TXQ - TXQ needs to become agg'ed 2809 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2810 * it as reserved 2811 */ 2812 txq_id = mvmsta->tid_data[tid].txq_id; 2813 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2814 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2815 IWL_MVM_DQA_MIN_DATA_QUEUE, 2816 IWL_MVM_DQA_MAX_DATA_QUEUE); 2817 if (ret < 0) { 2818 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2819 goto out; 2820 } 2821 2822 txq_id = ret; 2823 2824 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2825 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2826 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2827 ret = -ENXIO; 2828 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2829 tid, IWL_MAX_HW_QUEUES - 1); 2830 goto out; 2831 2832 } else if (unlikely(mvm->queue_info[txq_id].status == 2833 IWL_MVM_QUEUE_SHARED)) { 2834 ret = -ENXIO; 2835 IWL_DEBUG_TX_QUEUES(mvm, 2836 "Can't start tid %d agg on shared queue!\n", 2837 tid); 2838 goto out; 2839 } 2840 2841 IWL_DEBUG_TX_QUEUES(mvm, 2842 "AGG for tid %d will be on queue #%d\n", 2843 tid, txq_id); 2844 2845 tid_data = &mvmsta->tid_data[tid]; 2846 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2847 tid_data->txq_id = txq_id; 2848 *ssn = tid_data->ssn; 2849 2850 IWL_DEBUG_TX_QUEUES(mvm, 2851 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2852 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2853 tid_data->next_reclaimed); 2854 2855 /* 2856 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2857 * to align the wrap around of ssn so we compare relevant values. 2858 */ 2859 normalized_ssn = tid_data->ssn; 2860 if (mvm->trans->trans_cfg->gen2) 2861 normalized_ssn &= 0xff; 2862 2863 if (normalized_ssn == tid_data->next_reclaimed) { 2864 tid_data->state = IWL_AGG_STARTING; 2865 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2866 } else { 2867 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2868 ret = 0; 2869 } 2870 2871 out: 2872 spin_unlock_bh(&mvmsta->lock); 2873 2874 return ret; 2875 } 2876 2877 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2878 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2879 bool amsdu) 2880 { 2881 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2882 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2883 unsigned int wdg_timeout = 2884 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2885 int queue, ret; 2886 bool alloc_queue = true; 2887 enum iwl_mvm_queue_status queue_status; 2888 u16 ssn; 2889 2890 struct iwl_trans_txq_scd_cfg cfg = { 2891 .sta_id = mvmsta->sta_id, 2892 .tid = tid, 2893 .frame_limit = buf_size, 2894 .aggregate = true, 2895 }; 2896 2897 /* 2898 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2899 * manager, so this function should never be called in this case. 2900 */ 2901 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2902 return -EINVAL; 2903 2904 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2905 != IWL_MAX_TID_COUNT); 2906 2907 spin_lock_bh(&mvmsta->lock); 2908 ssn = tid_data->ssn; 2909 queue = tid_data->txq_id; 2910 tid_data->state = IWL_AGG_ON; 2911 mvmsta->agg_tids |= BIT(tid); 2912 tid_data->ssn = 0xffff; 2913 tid_data->amsdu_in_ampdu_allowed = amsdu; 2914 spin_unlock_bh(&mvmsta->lock); 2915 2916 if (iwl_mvm_has_new_tx_api(mvm)) { 2917 /* 2918 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2919 * would have failed, so if we are here there is no need to 2920 * allocate a queue. 2921 * However, if aggregation size is different than the default 2922 * size, the scheduler should be reconfigured. 2923 * We cannot do this with the new TX API, so return unsupported 2924 * for now, until it will be offloaded to firmware.. 2925 * Note that if SCD default value changes - this condition 2926 * should be updated as well. 2927 */ 2928 if (buf_size < IWL_FRAME_LIMIT) 2929 return -ENOTSUPP; 2930 2931 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2932 if (ret) 2933 return -EIO; 2934 goto out; 2935 } 2936 2937 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2938 2939 queue_status = mvm->queue_info[queue].status; 2940 2941 /* Maybe there is no need to even alloc a queue... */ 2942 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2943 alloc_queue = false; 2944 2945 /* 2946 * Only reconfig the SCD for the queue if the window size has 2947 * changed from current (become smaller) 2948 */ 2949 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2950 /* 2951 * If reconfiguring an existing queue, it first must be 2952 * drained 2953 */ 2954 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2955 BIT(queue)); 2956 if (ret) { 2957 IWL_ERR(mvm, 2958 "Error draining queue before reconfig\n"); 2959 return ret; 2960 } 2961 2962 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2963 mvmsta->sta_id, tid, 2964 buf_size, ssn); 2965 if (ret) { 2966 IWL_ERR(mvm, 2967 "Error reconfiguring TXQ #%d\n", queue); 2968 return ret; 2969 } 2970 } 2971 2972 if (alloc_queue) 2973 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2974 &cfg, wdg_timeout); 2975 2976 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2977 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2978 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2979 if (ret) 2980 return -EIO; 2981 } 2982 2983 /* No need to mark as reserved */ 2984 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2985 2986 out: 2987 /* 2988 * Even though in theory the peer could have different 2989 * aggregation reorder buffer sizes for different sessions, 2990 * our ucode doesn't allow for that and has a global limit 2991 * for each station. Therefore, use the minimum of all the 2992 * aggregation sessions and our default value. 2993 */ 2994 mvmsta->max_agg_bufsize = 2995 min(mvmsta->max_agg_bufsize, buf_size); 2996 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2997 2998 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2999 sta->addr, tid); 3000 3001 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 3002 } 3003 3004 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3005 struct iwl_mvm_sta *mvmsta, 3006 struct iwl_mvm_tid_data *tid_data) 3007 { 3008 u16 txq_id = tid_data->txq_id; 3009 3010 lockdep_assert_held(&mvm->mutex); 3011 3012 if (iwl_mvm_has_new_tx_api(mvm)) 3013 return; 3014 3015 /* 3016 * The TXQ is marked as reserved only if no traffic came through yet 3017 * This means no traffic has been sent on this TID (agg'd or not), so 3018 * we no longer have use for the queue. Since it hasn't even been 3019 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3020 * free. 3021 */ 3022 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3023 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3024 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3025 } 3026 } 3027 3028 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3029 struct ieee80211_sta *sta, u16 tid) 3030 { 3031 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3032 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3033 u16 txq_id; 3034 int err; 3035 3036 /* 3037 * If mac80211 is cleaning its state, then say that we finished since 3038 * our state has been cleared anyway. 3039 */ 3040 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3041 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3042 return 0; 3043 } 3044 3045 spin_lock_bh(&mvmsta->lock); 3046 3047 txq_id = tid_data->txq_id; 3048 3049 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3050 mvmsta->sta_id, tid, txq_id, tid_data->state); 3051 3052 mvmsta->agg_tids &= ~BIT(tid); 3053 3054 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3055 3056 switch (tid_data->state) { 3057 case IWL_AGG_ON: 3058 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3059 3060 IWL_DEBUG_TX_QUEUES(mvm, 3061 "ssn = %d, next_recl = %d\n", 3062 tid_data->ssn, tid_data->next_reclaimed); 3063 3064 tid_data->ssn = 0xffff; 3065 tid_data->state = IWL_AGG_OFF; 3066 spin_unlock_bh(&mvmsta->lock); 3067 3068 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3069 3070 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3071 return 0; 3072 case IWL_AGG_STARTING: 3073 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3074 /* 3075 * The agg session has been stopped before it was set up. This 3076 * can happen when the AddBA timer times out for example. 3077 */ 3078 3079 /* No barriers since we are under mutex */ 3080 lockdep_assert_held(&mvm->mutex); 3081 3082 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3083 tid_data->state = IWL_AGG_OFF; 3084 err = 0; 3085 break; 3086 default: 3087 IWL_ERR(mvm, 3088 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3089 mvmsta->sta_id, tid, tid_data->state); 3090 IWL_ERR(mvm, 3091 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3092 err = -EINVAL; 3093 } 3094 3095 spin_unlock_bh(&mvmsta->lock); 3096 3097 return err; 3098 } 3099 3100 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3101 struct ieee80211_sta *sta, u16 tid) 3102 { 3103 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3104 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3105 u16 txq_id; 3106 enum iwl_mvm_agg_state old_state; 3107 3108 /* 3109 * First set the agg state to OFF to avoid calling 3110 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3111 */ 3112 spin_lock_bh(&mvmsta->lock); 3113 txq_id = tid_data->txq_id; 3114 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3115 mvmsta->sta_id, tid, txq_id, tid_data->state); 3116 old_state = tid_data->state; 3117 tid_data->state = IWL_AGG_OFF; 3118 mvmsta->agg_tids &= ~BIT(tid); 3119 spin_unlock_bh(&mvmsta->lock); 3120 3121 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3122 3123 if (old_state >= IWL_AGG_ON) { 3124 iwl_mvm_drain_sta(mvm, mvmsta, true); 3125 3126 if (iwl_mvm_has_new_tx_api(mvm)) { 3127 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3128 BIT(tid), 0)) 3129 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3130 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3131 } else { 3132 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3133 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3134 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3135 } 3136 3137 iwl_mvm_drain_sta(mvm, mvmsta, false); 3138 3139 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3140 } 3141 3142 return 0; 3143 } 3144 3145 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3146 { 3147 int i, max = -1, max_offs = -1; 3148 3149 lockdep_assert_held(&mvm->mutex); 3150 3151 /* Pick the unused key offset with the highest 'deleted' 3152 * counter. Every time a key is deleted, all the counters 3153 * are incremented and the one that was just deleted is 3154 * reset to zero. Thus, the highest counter is the one 3155 * that was deleted longest ago. Pick that one. 3156 */ 3157 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3158 if (test_bit(i, mvm->fw_key_table)) 3159 continue; 3160 if (mvm->fw_key_deleted[i] > max) { 3161 max = mvm->fw_key_deleted[i]; 3162 max_offs = i; 3163 } 3164 } 3165 3166 if (max_offs < 0) 3167 return STA_KEY_IDX_INVALID; 3168 3169 return max_offs; 3170 } 3171 3172 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3173 struct ieee80211_vif *vif, 3174 struct ieee80211_sta *sta) 3175 { 3176 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3177 3178 if (sta) 3179 return iwl_mvm_sta_from_mac80211(sta); 3180 3181 /* 3182 * The device expects GTKs for station interfaces to be 3183 * installed as GTKs for the AP station. If we have no 3184 * station ID, then use AP's station ID. 3185 */ 3186 if (vif->type == NL80211_IFTYPE_STATION && 3187 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3188 u8 sta_id = mvmvif->ap_sta_id; 3189 3190 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3191 lockdep_is_held(&mvm->mutex)); 3192 3193 /* 3194 * It is possible that the 'sta' parameter is NULL, 3195 * for example when a GTK is removed - the sta_id will then 3196 * be the AP ID, and no station was passed by mac80211. 3197 */ 3198 if (IS_ERR_OR_NULL(sta)) 3199 return NULL; 3200 3201 return iwl_mvm_sta_from_mac80211(sta); 3202 } 3203 3204 return NULL; 3205 } 3206 3207 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3208 u32 sta_id, 3209 struct ieee80211_key_conf *key, bool mcast, 3210 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3211 u8 key_offset, bool mfp) 3212 { 3213 union { 3214 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3215 struct iwl_mvm_add_sta_key_cmd cmd; 3216 } u = {}; 3217 __le16 key_flags; 3218 int ret; 3219 u32 status; 3220 u16 keyidx; 3221 u64 pn = 0; 3222 int i, size; 3223 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3224 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3225 3226 if (sta_id == IWL_MVM_INVALID_STA) 3227 return -EINVAL; 3228 3229 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3230 STA_KEY_FLG_KEYID_MSK; 3231 key_flags = cpu_to_le16(keyidx); 3232 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3233 3234 switch (key->cipher) { 3235 case WLAN_CIPHER_SUITE_TKIP: 3236 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3237 if (new_api) { 3238 memcpy((void *)&u.cmd.tx_mic_key, 3239 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3240 IWL_MIC_KEY_SIZE); 3241 3242 memcpy((void *)&u.cmd.rx_mic_key, 3243 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3244 IWL_MIC_KEY_SIZE); 3245 pn = atomic64_read(&key->tx_pn); 3246 3247 } else { 3248 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3249 for (i = 0; i < 5; i++) 3250 u.cmd_v1.tkip_rx_ttak[i] = 3251 cpu_to_le16(tkip_p1k[i]); 3252 } 3253 memcpy(u.cmd.common.key, key->key, key->keylen); 3254 break; 3255 case WLAN_CIPHER_SUITE_CCMP: 3256 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3257 memcpy(u.cmd.common.key, key->key, key->keylen); 3258 if (new_api) 3259 pn = atomic64_read(&key->tx_pn); 3260 break; 3261 case WLAN_CIPHER_SUITE_WEP104: 3262 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3263 /* fall through */ 3264 case WLAN_CIPHER_SUITE_WEP40: 3265 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3266 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3267 break; 3268 case WLAN_CIPHER_SUITE_GCMP_256: 3269 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3270 /* fall through */ 3271 case WLAN_CIPHER_SUITE_GCMP: 3272 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3273 memcpy(u.cmd.common.key, key->key, key->keylen); 3274 if (new_api) 3275 pn = atomic64_read(&key->tx_pn); 3276 break; 3277 default: 3278 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3279 memcpy(u.cmd.common.key, key->key, key->keylen); 3280 } 3281 3282 if (mcast) 3283 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3284 if (mfp) 3285 key_flags |= cpu_to_le16(STA_KEY_MFP); 3286 3287 u.cmd.common.key_offset = key_offset; 3288 u.cmd.common.key_flags = key_flags; 3289 u.cmd.common.sta_id = sta_id; 3290 3291 if (new_api) { 3292 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3293 size = sizeof(u.cmd); 3294 } else { 3295 size = sizeof(u.cmd_v1); 3296 } 3297 3298 status = ADD_STA_SUCCESS; 3299 if (cmd_flags & CMD_ASYNC) 3300 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3301 &u.cmd); 3302 else 3303 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3304 &u.cmd, &status); 3305 3306 switch (status) { 3307 case ADD_STA_SUCCESS: 3308 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3309 break; 3310 default: 3311 ret = -EIO; 3312 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3313 break; 3314 } 3315 3316 return ret; 3317 } 3318 3319 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3320 struct ieee80211_key_conf *keyconf, 3321 u8 sta_id, bool remove_key) 3322 { 3323 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3324 3325 /* verify the key details match the required command's expectations */ 3326 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3327 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3328 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3329 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3330 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3331 return -EINVAL; 3332 3333 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3334 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3335 return -EINVAL; 3336 3337 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3338 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3339 3340 if (remove_key) { 3341 /* This is a valid situation for IGTK */ 3342 if (sta_id == IWL_MVM_INVALID_STA) 3343 return 0; 3344 3345 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3346 } else { 3347 struct ieee80211_key_seq seq; 3348 const u8 *pn; 3349 3350 switch (keyconf->cipher) { 3351 case WLAN_CIPHER_SUITE_AES_CMAC: 3352 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3353 break; 3354 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3355 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3356 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3357 break; 3358 default: 3359 return -EINVAL; 3360 } 3361 3362 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3363 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3364 igtk_cmd.ctrl_flags |= 3365 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3366 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3367 pn = seq.aes_cmac.pn; 3368 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3369 ((u64) pn[4] << 8) | 3370 ((u64) pn[3] << 16) | 3371 ((u64) pn[2] << 24) | 3372 ((u64) pn[1] << 32) | 3373 ((u64) pn[0] << 40)); 3374 } 3375 3376 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3377 remove_key ? "removing" : "installing", 3378 igtk_cmd.sta_id); 3379 3380 if (!iwl_mvm_has_new_rx_api(mvm)) { 3381 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3382 .ctrl_flags = igtk_cmd.ctrl_flags, 3383 .key_id = igtk_cmd.key_id, 3384 .sta_id = igtk_cmd.sta_id, 3385 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3386 }; 3387 3388 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3389 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3390 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3391 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3392 } 3393 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3394 sizeof(igtk_cmd), &igtk_cmd); 3395 } 3396 3397 3398 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3399 struct ieee80211_vif *vif, 3400 struct ieee80211_sta *sta) 3401 { 3402 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3403 3404 if (sta) 3405 return sta->addr; 3406 3407 if (vif->type == NL80211_IFTYPE_STATION && 3408 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3409 u8 sta_id = mvmvif->ap_sta_id; 3410 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3411 lockdep_is_held(&mvm->mutex)); 3412 return sta->addr; 3413 } 3414 3415 3416 return NULL; 3417 } 3418 3419 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3420 struct ieee80211_vif *vif, 3421 struct ieee80211_sta *sta, 3422 struct ieee80211_key_conf *keyconf, 3423 u8 key_offset, 3424 bool mcast) 3425 { 3426 int ret; 3427 const u8 *addr; 3428 struct ieee80211_key_seq seq; 3429 u16 p1k[5]; 3430 u32 sta_id; 3431 bool mfp = false; 3432 3433 if (sta) { 3434 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3435 3436 sta_id = mvm_sta->sta_id; 3437 mfp = sta->mfp; 3438 } else if (vif->type == NL80211_IFTYPE_AP && 3439 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3440 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3441 3442 sta_id = mvmvif->mcast_sta.sta_id; 3443 } else { 3444 IWL_ERR(mvm, "Failed to find station id\n"); 3445 return -EINVAL; 3446 } 3447 3448 switch (keyconf->cipher) { 3449 case WLAN_CIPHER_SUITE_TKIP: 3450 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3451 /* get phase 1 key from mac80211 */ 3452 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3453 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3454 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3455 seq.tkip.iv32, p1k, 0, key_offset, 3456 mfp); 3457 break; 3458 case WLAN_CIPHER_SUITE_CCMP: 3459 case WLAN_CIPHER_SUITE_WEP40: 3460 case WLAN_CIPHER_SUITE_WEP104: 3461 case WLAN_CIPHER_SUITE_GCMP: 3462 case WLAN_CIPHER_SUITE_GCMP_256: 3463 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3464 0, NULL, 0, key_offset, mfp); 3465 break; 3466 default: 3467 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3468 0, NULL, 0, key_offset, mfp); 3469 } 3470 3471 return ret; 3472 } 3473 3474 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3475 struct ieee80211_vif *vif, 3476 struct ieee80211_sta *sta, 3477 struct ieee80211_key_conf *keyconf, 3478 u8 key_offset) 3479 { 3480 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3481 struct iwl_mvm_sta *mvm_sta; 3482 u8 sta_id = IWL_MVM_INVALID_STA; 3483 int ret; 3484 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3485 3486 lockdep_assert_held(&mvm->mutex); 3487 3488 if (vif->type != NL80211_IFTYPE_AP || 3489 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3490 /* Get the station id from the mvm local station table */ 3491 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3492 if (!mvm_sta) { 3493 IWL_ERR(mvm, "Failed to find station\n"); 3494 return -EINVAL; 3495 } 3496 sta_id = mvm_sta->sta_id; 3497 3498 /* 3499 * It is possible that the 'sta' parameter is NULL, and thus 3500 * there is a need to retrieve the sta from the local station 3501 * table. 3502 */ 3503 if (!sta) { 3504 sta = rcu_dereference_protected( 3505 mvm->fw_id_to_mac_id[sta_id], 3506 lockdep_is_held(&mvm->mutex)); 3507 if (IS_ERR_OR_NULL(sta)) { 3508 IWL_ERR(mvm, "Invalid station id\n"); 3509 return -EINVAL; 3510 } 3511 } 3512 3513 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3514 return -EINVAL; 3515 } else { 3516 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3517 3518 sta_id = mvmvif->mcast_sta.sta_id; 3519 } 3520 3521 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3522 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3523 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3524 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3525 goto end; 3526 } 3527 3528 /* If the key_offset is not pre-assigned, we need to find a 3529 * new offset to use. In normal cases, the offset is not 3530 * pre-assigned, but during HW_RESTART we want to reuse the 3531 * same indices, so we pass them when this function is called. 3532 * 3533 * In D3 entry, we need to hardcoded the indices (because the 3534 * firmware hardcodes the PTK offset to 0). In this case, we 3535 * need to make sure we don't overwrite the hw_key_idx in the 3536 * keyconf structure, because otherwise we cannot configure 3537 * the original ones back when resuming. 3538 */ 3539 if (key_offset == STA_KEY_IDX_INVALID) { 3540 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3541 if (key_offset == STA_KEY_IDX_INVALID) 3542 return -ENOSPC; 3543 keyconf->hw_key_idx = key_offset; 3544 } 3545 3546 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3547 if (ret) 3548 goto end; 3549 3550 /* 3551 * For WEP, the same key is used for multicast and unicast. Upload it 3552 * again, using the same key offset, and now pointing the other one 3553 * to the same key slot (offset). 3554 * If this fails, remove the original as well. 3555 */ 3556 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3557 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3558 sta) { 3559 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3560 key_offset, !mcast); 3561 if (ret) { 3562 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3563 goto end; 3564 } 3565 } 3566 3567 __set_bit(key_offset, mvm->fw_key_table); 3568 3569 end: 3570 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3571 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3572 sta ? sta->addr : zero_addr, ret); 3573 return ret; 3574 } 3575 3576 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3577 struct ieee80211_vif *vif, 3578 struct ieee80211_sta *sta, 3579 struct ieee80211_key_conf *keyconf) 3580 { 3581 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3582 struct iwl_mvm_sta *mvm_sta; 3583 u8 sta_id = IWL_MVM_INVALID_STA; 3584 int ret, i; 3585 3586 lockdep_assert_held(&mvm->mutex); 3587 3588 /* Get the station from the mvm local station table */ 3589 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3590 if (mvm_sta) 3591 sta_id = mvm_sta->sta_id; 3592 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3593 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3594 3595 3596 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3597 keyconf->keyidx, sta_id); 3598 3599 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3600 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3601 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3602 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3603 3604 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3605 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3606 keyconf->hw_key_idx); 3607 return -ENOENT; 3608 } 3609 3610 /* track which key was deleted last */ 3611 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3612 if (mvm->fw_key_deleted[i] < U8_MAX) 3613 mvm->fw_key_deleted[i]++; 3614 } 3615 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3616 3617 if (sta && !mvm_sta) { 3618 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3619 return 0; 3620 } 3621 3622 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3623 if (ret) 3624 return ret; 3625 3626 /* delete WEP key twice to get rid of (now useless) offset */ 3627 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3628 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3629 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3630 3631 return ret; 3632 } 3633 3634 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3635 struct ieee80211_vif *vif, 3636 struct ieee80211_key_conf *keyconf, 3637 struct ieee80211_sta *sta, u32 iv32, 3638 u16 *phase1key) 3639 { 3640 struct iwl_mvm_sta *mvm_sta; 3641 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3642 bool mfp = sta ? sta->mfp : false; 3643 3644 rcu_read_lock(); 3645 3646 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3647 if (WARN_ON_ONCE(!mvm_sta)) 3648 goto unlock; 3649 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3650 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3651 mfp); 3652 3653 unlock: 3654 rcu_read_unlock(); 3655 } 3656 3657 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3658 struct ieee80211_sta *sta) 3659 { 3660 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3661 struct iwl_mvm_add_sta_cmd cmd = { 3662 .add_modify = STA_MODE_MODIFY, 3663 .sta_id = mvmsta->sta_id, 3664 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3665 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3666 }; 3667 int ret; 3668 3669 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3670 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3671 if (ret) 3672 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3673 } 3674 3675 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3676 struct ieee80211_sta *sta, 3677 enum ieee80211_frame_release_type reason, 3678 u16 cnt, u16 tids, bool more_data, 3679 bool single_sta_queue) 3680 { 3681 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3682 struct iwl_mvm_add_sta_cmd cmd = { 3683 .add_modify = STA_MODE_MODIFY, 3684 .sta_id = mvmsta->sta_id, 3685 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3686 .sleep_tx_count = cpu_to_le16(cnt), 3687 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3688 }; 3689 int tid, ret; 3690 unsigned long _tids = tids; 3691 3692 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3693 * Note that this field is reserved and unused by firmware not 3694 * supporting GO uAPSD, so it's safe to always do this. 3695 */ 3696 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3697 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3698 3699 /* If we're releasing frames from aggregation or dqa queues then check 3700 * if all the queues that we're releasing frames from, combined, have: 3701 * - more frames than the service period, in which case more_data 3702 * needs to be set 3703 * - fewer than 'cnt' frames, in which case we need to adjust the 3704 * firmware command (but do that unconditionally) 3705 */ 3706 if (single_sta_queue) { 3707 int remaining = cnt; 3708 int sleep_tx_count; 3709 3710 spin_lock_bh(&mvmsta->lock); 3711 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3712 struct iwl_mvm_tid_data *tid_data; 3713 u16 n_queued; 3714 3715 tid_data = &mvmsta->tid_data[tid]; 3716 3717 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3718 if (n_queued > remaining) { 3719 more_data = true; 3720 remaining = 0; 3721 break; 3722 } 3723 remaining -= n_queued; 3724 } 3725 sleep_tx_count = cnt - remaining; 3726 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3727 mvmsta->sleep_tx_count = sleep_tx_count; 3728 spin_unlock_bh(&mvmsta->lock); 3729 3730 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3731 if (WARN_ON(cnt - remaining == 0)) { 3732 ieee80211_sta_eosp(sta); 3733 return; 3734 } 3735 } 3736 3737 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3738 if (more_data) 3739 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3740 3741 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3742 mvmsta->next_status_eosp = true; 3743 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3744 } else { 3745 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3746 } 3747 3748 /* block the Tx queues until the FW updated the sleep Tx count */ 3749 iwl_trans_block_txq_ptrs(mvm->trans, true); 3750 3751 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3752 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3753 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3754 if (ret) 3755 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3756 } 3757 3758 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3759 struct iwl_rx_cmd_buffer *rxb) 3760 { 3761 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3762 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3763 struct ieee80211_sta *sta; 3764 u32 sta_id = le32_to_cpu(notif->sta_id); 3765 3766 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3767 return; 3768 3769 rcu_read_lock(); 3770 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3771 if (!IS_ERR_OR_NULL(sta)) 3772 ieee80211_sta_eosp(sta); 3773 rcu_read_unlock(); 3774 } 3775 3776 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3777 struct iwl_mvm_sta *mvmsta, bool disable) 3778 { 3779 struct iwl_mvm_add_sta_cmd cmd = { 3780 .add_modify = STA_MODE_MODIFY, 3781 .sta_id = mvmsta->sta_id, 3782 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3783 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3784 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3785 }; 3786 int ret; 3787 3788 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3789 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3790 if (ret) 3791 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3792 } 3793 3794 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3795 struct ieee80211_sta *sta, 3796 bool disable) 3797 { 3798 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3799 3800 spin_lock_bh(&mvm_sta->lock); 3801 3802 if (mvm_sta->disable_tx == disable) { 3803 spin_unlock_bh(&mvm_sta->lock); 3804 return; 3805 } 3806 3807 mvm_sta->disable_tx = disable; 3808 3809 /* Tell mac80211 to start/stop queuing tx for this station */ 3810 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3811 3812 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3813 3814 spin_unlock_bh(&mvm_sta->lock); 3815 } 3816 3817 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3818 struct iwl_mvm_vif *mvmvif, 3819 struct iwl_mvm_int_sta *sta, 3820 bool disable) 3821 { 3822 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3823 struct iwl_mvm_add_sta_cmd cmd = { 3824 .add_modify = STA_MODE_MODIFY, 3825 .sta_id = sta->sta_id, 3826 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3827 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3828 .mac_id_n_color = cpu_to_le32(id), 3829 }; 3830 int ret; 3831 3832 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3833 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3834 if (ret) 3835 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3836 } 3837 3838 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3839 struct iwl_mvm_vif *mvmvif, 3840 bool disable) 3841 { 3842 struct ieee80211_sta *sta; 3843 struct iwl_mvm_sta *mvm_sta; 3844 int i; 3845 3846 lockdep_assert_held(&mvm->mutex); 3847 3848 /* Block/unblock all the stations of the given mvmvif */ 3849 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3850 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3851 lockdep_is_held(&mvm->mutex)); 3852 if (IS_ERR_OR_NULL(sta)) 3853 continue; 3854 3855 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3856 if (mvm_sta->mac_id_n_color != 3857 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3858 continue; 3859 3860 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3861 } 3862 3863 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3864 return; 3865 3866 /* Need to block/unblock also multicast station */ 3867 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3868 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3869 &mvmvif->mcast_sta, disable); 3870 3871 /* 3872 * Only unblock the broadcast station (FW blocks it for immediate 3873 * quiet, not the driver) 3874 */ 3875 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3876 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3877 &mvmvif->bcast_sta, disable); 3878 } 3879 3880 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3881 { 3882 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3883 struct iwl_mvm_sta *mvmsta; 3884 3885 rcu_read_lock(); 3886 3887 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3888 3889 if (!WARN_ON(!mvmsta)) 3890 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3891 3892 rcu_read_unlock(); 3893 } 3894 3895 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3896 { 3897 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3898 3899 /* 3900 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3901 * to align the wrap around of ssn so we compare relevant values. 3902 */ 3903 if (mvm->trans->trans_cfg->gen2) 3904 sn &= 0xff; 3905 3906 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3907 } 3908