1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2015, 2018 - 2020 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2012 - 2015, 2018 - 2020 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include <net/mac80211.h> 63 64 #include "mvm.h" 65 #include "sta.h" 66 #include "rs.h" 67 68 /* 69 * New version of ADD_STA_sta command added new fields at the end of the 70 * structure, so sending the size of the relevant API's structure is enough to 71 * support both API versions. 72 */ 73 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 74 { 75 if (iwl_mvm_has_new_rx_api(mvm) || 76 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 77 return sizeof(struct iwl_mvm_add_sta_cmd); 78 else 79 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 80 } 81 82 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 83 enum nl80211_iftype iftype) 84 { 85 int sta_id; 86 u32 reserved_ids = 0; 87 88 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 89 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 90 91 lockdep_assert_held(&mvm->mutex); 92 93 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 94 if (iftype != NL80211_IFTYPE_STATION) 95 reserved_ids = BIT(0); 96 97 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 98 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 99 if (BIT(sta_id) & reserved_ids) 100 continue; 101 102 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 103 lockdep_is_held(&mvm->mutex))) 104 return sta_id; 105 } 106 return IWL_MVM_INVALID_STA; 107 } 108 109 /* send station add/update command to firmware */ 110 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 111 bool update, unsigned int flags) 112 { 113 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 114 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 115 .sta_id = mvm_sta->sta_id, 116 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 117 .add_modify = update ? 1 : 0, 118 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 119 STA_FLG_MIMO_EN_MSK | 120 STA_FLG_RTS_MIMO_PROT), 121 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 122 }; 123 int ret; 124 u32 status; 125 u32 agg_size = 0, mpdu_dens = 0; 126 127 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 128 add_sta_cmd.station_type = mvm_sta->sta_type; 129 130 if (!update || (flags & STA_MODIFY_QUEUES)) { 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 133 if (!iwl_mvm_has_new_tx_api(mvm)) { 134 add_sta_cmd.tfd_queue_msk = 135 cpu_to_le32(mvm_sta->tfd_queue_msk); 136 137 if (flags & STA_MODIFY_QUEUES) 138 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 139 } else { 140 WARN_ON(flags & STA_MODIFY_QUEUES); 141 } 142 } 143 144 switch (sta->bandwidth) { 145 case IEEE80211_STA_RX_BW_160: 146 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 147 /* fall through */ 148 case IEEE80211_STA_RX_BW_80: 149 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 150 /* fall through */ 151 case IEEE80211_STA_RX_BW_40: 152 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 153 /* fall through */ 154 case IEEE80211_STA_RX_BW_20: 155 if (sta->ht_cap.ht_supported) 156 add_sta_cmd.station_flags |= 157 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 158 break; 159 } 160 161 switch (sta->rx_nss) { 162 case 1: 163 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 164 break; 165 case 2: 166 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 167 break; 168 case 3 ... 8: 169 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 170 break; 171 } 172 173 switch (sta->smps_mode) { 174 case IEEE80211_SMPS_AUTOMATIC: 175 case IEEE80211_SMPS_NUM_MODES: 176 WARN_ON(1); 177 break; 178 case IEEE80211_SMPS_STATIC: 179 /* override NSS */ 180 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 181 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 182 break; 183 case IEEE80211_SMPS_DYNAMIC: 184 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 185 break; 186 case IEEE80211_SMPS_OFF: 187 /* nothing */ 188 break; 189 } 190 191 if (sta->ht_cap.ht_supported) { 192 add_sta_cmd.station_flags_msk |= 193 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 194 STA_FLG_AGG_MPDU_DENS_MSK); 195 196 mpdu_dens = sta->ht_cap.ampdu_density; 197 } 198 199 if (sta->vht_cap.vht_supported) { 200 agg_size = sta->vht_cap.cap & 201 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 202 agg_size >>= 203 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 204 } else if (sta->ht_cap.ht_supported) { 205 agg_size = sta->ht_cap.ampdu_factor; 206 } 207 208 add_sta_cmd.station_flags |= 209 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 210 add_sta_cmd.station_flags |= 211 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 212 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC) 213 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 214 215 if (sta->wme) { 216 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 217 218 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 219 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 220 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 221 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 223 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 225 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 226 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 227 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 228 } 229 230 status = ADD_STA_SUCCESS; 231 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 232 iwl_mvm_add_sta_cmd_size(mvm), 233 &add_sta_cmd, &status); 234 if (ret) 235 return ret; 236 237 switch (status & IWL_ADD_STA_STATUS_MASK) { 238 case ADD_STA_SUCCESS: 239 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 240 break; 241 default: 242 ret = -EIO; 243 IWL_ERR(mvm, "ADD_STA failed\n"); 244 break; 245 } 246 247 return ret; 248 } 249 250 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 251 { 252 struct iwl_mvm_baid_data *data = 253 from_timer(data, t, session_timer); 254 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 255 struct iwl_mvm_baid_data *ba_data; 256 struct ieee80211_sta *sta; 257 struct iwl_mvm_sta *mvm_sta; 258 unsigned long timeout; 259 260 rcu_read_lock(); 261 262 ba_data = rcu_dereference(*rcu_ptr); 263 264 if (WARN_ON(!ba_data)) 265 goto unlock; 266 267 if (!ba_data->timeout) 268 goto unlock; 269 270 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 271 if (time_is_after_jiffies(timeout)) { 272 mod_timer(&ba_data->session_timer, timeout); 273 goto unlock; 274 } 275 276 /* Timer expired */ 277 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 278 279 /* 280 * sta should be valid unless the following happens: 281 * The firmware asserts which triggers a reconfig flow, but 282 * the reconfig fails before we set the pointer to sta into 283 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 284 * A-MDPU and hence the timer continues to run. Then, the 285 * timer expires and sta is NULL. 286 */ 287 if (!sta) 288 goto unlock; 289 290 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 291 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 292 sta->addr, ba_data->tid); 293 unlock: 294 rcu_read_unlock(); 295 } 296 297 /* Disable aggregations for a bitmap of TIDs for a given station */ 298 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 299 unsigned long disable_agg_tids, 300 bool remove_queue) 301 { 302 struct iwl_mvm_add_sta_cmd cmd = {}; 303 struct ieee80211_sta *sta; 304 struct iwl_mvm_sta *mvmsta; 305 u32 status; 306 u8 sta_id; 307 308 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 309 return -EINVAL; 310 311 sta_id = mvm->queue_info[queue].ra_sta_id; 312 313 rcu_read_lock(); 314 315 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 316 317 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 318 rcu_read_unlock(); 319 return -EINVAL; 320 } 321 322 mvmsta = iwl_mvm_sta_from_mac80211(sta); 323 324 mvmsta->tid_disable_agg |= disable_agg_tids; 325 326 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 327 cmd.sta_id = mvmsta->sta_id; 328 cmd.add_modify = STA_MODE_MODIFY; 329 cmd.modify_mask = STA_MODIFY_QUEUES; 330 if (disable_agg_tids) 331 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 332 if (remove_queue) 333 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 334 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 335 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 336 337 rcu_read_unlock(); 338 339 /* Notify FW of queue removal from the STA queues */ 340 status = ADD_STA_SUCCESS; 341 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 342 iwl_mvm_add_sta_cmd_size(mvm), 343 &cmd, &status); 344 } 345 346 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 347 int queue, u8 tid, u8 flags) 348 { 349 struct iwl_scd_txq_cfg_cmd cmd = { 350 .scd_queue = queue, 351 .action = SCD_CFG_DISABLE_QUEUE, 352 }; 353 int ret; 354 355 if (iwl_mvm_has_new_tx_api(mvm)) { 356 iwl_trans_txq_free(mvm->trans, queue); 357 358 return 0; 359 } 360 361 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) 362 return 0; 363 364 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 365 366 cmd.action = mvm->queue_info[queue].tid_bitmap ? 367 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE; 368 if (cmd.action == SCD_CFG_DISABLE_QUEUE) 369 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE; 370 371 IWL_DEBUG_TX_QUEUES(mvm, 372 "Disabling TXQ #%d tids=0x%x\n", 373 queue, 374 mvm->queue_info[queue].tid_bitmap); 375 376 /* If the queue is still enabled - nothing left to do in this func */ 377 if (cmd.action == SCD_CFG_ENABLE_QUEUE) 378 return 0; 379 380 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 381 cmd.tid = mvm->queue_info[queue].txq_tid; 382 383 /* Make sure queue info is correct even though we overwrite it */ 384 WARN(mvm->queue_info[queue].tid_bitmap, 385 "TXQ #%d info out-of-sync - tids=0x%x\n", 386 queue, mvm->queue_info[queue].tid_bitmap); 387 388 /* If we are here - the queue is freed and we can zero out these vals */ 389 mvm->queue_info[queue].tid_bitmap = 0; 390 391 if (sta) { 392 struct iwl_mvm_txq *mvmtxq = 393 iwl_mvm_txq_from_tid(sta, tid); 394 395 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 396 } 397 398 /* Regardless if this is a reserved TXQ for a STA - mark it as false */ 399 mvm->queue_info[queue].reserved = false; 400 401 iwl_trans_txq_disable(mvm->trans, queue, false); 402 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags, 403 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd); 404 405 if (ret) 406 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n", 407 queue, ret); 408 return ret; 409 } 410 411 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 412 { 413 struct ieee80211_sta *sta; 414 struct iwl_mvm_sta *mvmsta; 415 unsigned long tid_bitmap; 416 unsigned long agg_tids = 0; 417 u8 sta_id; 418 int tid; 419 420 lockdep_assert_held(&mvm->mutex); 421 422 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 423 return -EINVAL; 424 425 sta_id = mvm->queue_info[queue].ra_sta_id; 426 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 427 428 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 429 lockdep_is_held(&mvm->mutex)); 430 431 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 432 return -EINVAL; 433 434 mvmsta = iwl_mvm_sta_from_mac80211(sta); 435 436 spin_lock_bh(&mvmsta->lock); 437 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 438 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 439 agg_tids |= BIT(tid); 440 } 441 spin_unlock_bh(&mvmsta->lock); 442 443 return agg_tids; 444 } 445 446 /* 447 * Remove a queue from a station's resources. 448 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 449 * doesn't disable the queue 450 */ 451 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 452 { 453 struct ieee80211_sta *sta; 454 struct iwl_mvm_sta *mvmsta; 455 unsigned long tid_bitmap; 456 unsigned long disable_agg_tids = 0; 457 u8 sta_id; 458 int tid; 459 460 lockdep_assert_held(&mvm->mutex); 461 462 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 463 return -EINVAL; 464 465 sta_id = mvm->queue_info[queue].ra_sta_id; 466 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 467 468 rcu_read_lock(); 469 470 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 471 472 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 473 rcu_read_unlock(); 474 return 0; 475 } 476 477 mvmsta = iwl_mvm_sta_from_mac80211(sta); 478 479 spin_lock_bh(&mvmsta->lock); 480 /* Unmap MAC queues and TIDs from this queue */ 481 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 482 struct iwl_mvm_txq *mvmtxq = 483 iwl_mvm_txq_from_tid(sta, tid); 484 485 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 486 disable_agg_tids |= BIT(tid); 487 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 488 489 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 490 } 491 492 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 493 spin_unlock_bh(&mvmsta->lock); 494 495 rcu_read_unlock(); 496 497 /* 498 * The TX path may have been using this TXQ_ID from the tid_data, 499 * so make sure it's no longer running so that we can safely reuse 500 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE 501 * above, but nothing guarantees we've stopped using them. Thus, 502 * without this, we could get to iwl_mvm_disable_txq() and remove 503 * the queue while still sending frames to it. 504 */ 505 synchronize_net(); 506 507 return disable_agg_tids; 508 } 509 510 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 511 struct ieee80211_sta *old_sta, 512 u8 new_sta_id) 513 { 514 struct iwl_mvm_sta *mvmsta; 515 u8 sta_id, tid; 516 unsigned long disable_agg_tids = 0; 517 bool same_sta; 518 int ret; 519 520 lockdep_assert_held(&mvm->mutex); 521 522 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 523 return -EINVAL; 524 525 sta_id = mvm->queue_info[queue].ra_sta_id; 526 tid = mvm->queue_info[queue].txq_tid; 527 528 same_sta = sta_id == new_sta_id; 529 530 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 531 if (WARN_ON(!mvmsta)) 532 return -EINVAL; 533 534 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 535 /* Disable the queue */ 536 if (disable_agg_tids) 537 iwl_mvm_invalidate_sta_queue(mvm, queue, 538 disable_agg_tids, false); 539 540 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0); 541 if (ret) { 542 IWL_ERR(mvm, 543 "Failed to free inactive queue %d (ret=%d)\n", 544 queue, ret); 545 546 return ret; 547 } 548 549 /* If TXQ is allocated to another STA, update removal in FW */ 550 if (!same_sta) 551 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 552 553 return 0; 554 } 555 556 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 557 unsigned long tfd_queue_mask, u8 ac) 558 { 559 int queue = 0; 560 u8 ac_to_queue[IEEE80211_NUM_ACS]; 561 int i; 562 563 /* 564 * This protects us against grabbing a queue that's being reconfigured 565 * by the inactivity checker. 566 */ 567 lockdep_assert_held(&mvm->mutex); 568 569 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 570 return -EINVAL; 571 572 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 573 574 /* See what ACs the existing queues for this STA have */ 575 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 576 /* Only DATA queues can be shared */ 577 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 578 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 579 continue; 580 581 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 582 } 583 584 /* 585 * The queue to share is chosen only from DATA queues as follows (in 586 * descending priority): 587 * 1. An AC_BE queue 588 * 2. Same AC queue 589 * 3. Highest AC queue that is lower than new AC 590 * 4. Any existing AC (there always is at least 1 DATA queue) 591 */ 592 593 /* Priority 1: An AC_BE queue */ 594 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 595 queue = ac_to_queue[IEEE80211_AC_BE]; 596 /* Priority 2: Same AC queue */ 597 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 598 queue = ac_to_queue[ac]; 599 /* Priority 3a: If new AC is VO and VI exists - use VI */ 600 else if (ac == IEEE80211_AC_VO && 601 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 602 queue = ac_to_queue[IEEE80211_AC_VI]; 603 /* Priority 3b: No BE so only AC less than the new one is BK */ 604 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 605 queue = ac_to_queue[IEEE80211_AC_BK]; 606 /* Priority 4a: No BE nor BK - use VI if exists */ 607 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 608 queue = ac_to_queue[IEEE80211_AC_VI]; 609 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 610 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 611 queue = ac_to_queue[IEEE80211_AC_VO]; 612 613 /* Make sure queue found (or not) is legal */ 614 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 615 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 616 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 617 IWL_ERR(mvm, "No DATA queues available to share\n"); 618 return -ENOSPC; 619 } 620 621 return queue; 622 } 623 624 /* 625 * If a given queue has a higher AC than the TID stream that is being compared 626 * to, the queue needs to be redirected to the lower AC. This function does that 627 * in such a case, otherwise - if no redirection required - it does nothing, 628 * unless the %force param is true. 629 */ 630 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, 631 int ac, int ssn, unsigned int wdg_timeout, 632 bool force, struct iwl_mvm_txq *txq) 633 { 634 struct iwl_scd_txq_cfg_cmd cmd = { 635 .scd_queue = queue, 636 .action = SCD_CFG_DISABLE_QUEUE, 637 }; 638 bool shared_queue; 639 int ret; 640 641 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 642 return -EINVAL; 643 644 /* 645 * If the AC is lower than current one - FIFO needs to be redirected to 646 * the lowest one of the streams in the queue. Check if this is needed 647 * here. 648 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 649 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 650 * we need to check if the numerical value of X is LARGER than of Y. 651 */ 652 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 653 IWL_DEBUG_TX_QUEUES(mvm, 654 "No redirection needed on TXQ #%d\n", 655 queue); 656 return 0; 657 } 658 659 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 660 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 661 cmd.tid = mvm->queue_info[queue].txq_tid; 662 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1; 663 664 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 665 queue, iwl_mvm_ac_to_tx_fifo[ac]); 666 667 /* Stop the queue and wait for it to empty */ 668 txq->stopped = true; 669 670 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 671 if (ret) { 672 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 673 queue); 674 ret = -EIO; 675 goto out; 676 } 677 678 /* Before redirecting the queue we need to de-activate it */ 679 iwl_trans_txq_disable(mvm->trans, queue, false); 680 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 681 if (ret) 682 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 683 ret); 684 685 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 686 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 687 688 /* Update the TID "owner" of the queue */ 689 mvm->queue_info[queue].txq_tid = tid; 690 691 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 692 693 /* Redirect to lower AC */ 694 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 695 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 696 697 /* Update AC marking of the queue */ 698 mvm->queue_info[queue].mac80211_ac = ac; 699 700 /* 701 * Mark queue as shared in transport if shared 702 * Note this has to be done after queue enablement because enablement 703 * can also set this value, and there is no indication there to shared 704 * queues 705 */ 706 if (shared_queue) 707 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 708 709 out: 710 /* Continue using the queue */ 711 txq->stopped = false; 712 713 return ret; 714 } 715 716 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, 717 u8 minq, u8 maxq) 718 { 719 int i; 720 721 lockdep_assert_held(&mvm->mutex); 722 723 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues, 724 "max queue %d >= num_of_queues (%d)", maxq, 725 mvm->trans->trans_cfg->base_params->num_of_queues)) 726 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1; 727 728 /* This should not be hit with new TX path */ 729 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 730 return -ENOSPC; 731 732 /* Start by looking for a free queue */ 733 for (i = minq; i <= maxq; i++) 734 if (mvm->queue_info[i].tid_bitmap == 0 && 735 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) 736 return i; 737 738 return -ENOSPC; 739 } 740 741 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, 742 u8 sta_id, u8 tid, unsigned int timeout) 743 { 744 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE, 745 mvm->trans->cfg->min_256_ba_txq_size); 746 747 if (tid == IWL_MAX_TID_COUNT) { 748 tid = IWL_MGMT_TID; 749 size = max_t(u32, IWL_MGMT_QUEUE_SIZE, 750 mvm->trans->cfg->min_txq_size); 751 } 752 753 do { 754 __le16 enable = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE); 755 756 queue = iwl_trans_txq_alloc(mvm->trans, enable, 757 sta_id, tid, SCD_QUEUE_CFG, 758 size, timeout); 759 760 if (queue < 0) 761 IWL_DEBUG_TX_QUEUES(mvm, 762 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n", 763 size, sta_id, tid, queue); 764 size /= 2; 765 } while (queue < 0 && size >= 16); 766 767 if (queue < 0) 768 return queue; 769 770 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n", 771 queue, sta_id, tid); 772 773 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue); 774 775 return queue; 776 } 777 778 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 779 struct ieee80211_sta *sta, u8 ac, 780 int tid) 781 { 782 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 783 struct iwl_mvm_txq *mvmtxq = 784 iwl_mvm_txq_from_tid(sta, tid); 785 unsigned int wdg_timeout = 786 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 787 int queue = -1; 788 789 lockdep_assert_held(&mvm->mutex); 790 791 IWL_DEBUG_TX_QUEUES(mvm, 792 "Allocating queue for sta %d on tid %d\n", 793 mvmsta->sta_id, tid); 794 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout); 795 if (queue < 0) 796 return queue; 797 798 mvmtxq->txq_id = queue; 799 mvm->tvqm_info[queue].txq_tid = tid; 800 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id; 801 802 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 803 804 spin_lock_bh(&mvmsta->lock); 805 mvmsta->tid_data[tid].txq_id = queue; 806 spin_unlock_bh(&mvmsta->lock); 807 808 return 0; 809 } 810 811 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, 812 struct ieee80211_sta *sta, 813 int queue, u8 sta_id, u8 tid) 814 { 815 bool enable_queue = true; 816 817 /* Make sure this TID isn't already enabled */ 818 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) { 819 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n", 820 queue, tid); 821 return false; 822 } 823 824 /* Update mappings and refcounts */ 825 if (mvm->queue_info[queue].tid_bitmap) 826 enable_queue = false; 827 828 mvm->queue_info[queue].tid_bitmap |= BIT(tid); 829 mvm->queue_info[queue].ra_sta_id = sta_id; 830 831 if (enable_queue) { 832 if (tid != IWL_MAX_TID_COUNT) 833 mvm->queue_info[queue].mac80211_ac = 834 tid_to_mac80211_ac[tid]; 835 else 836 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO; 837 838 mvm->queue_info[queue].txq_tid = tid; 839 } 840 841 if (sta) { 842 struct iwl_mvm_txq *mvmtxq = 843 iwl_mvm_txq_from_tid(sta, tid); 844 845 mvmtxq->txq_id = queue; 846 } 847 848 IWL_DEBUG_TX_QUEUES(mvm, 849 "Enabling TXQ #%d tids=0x%x\n", 850 queue, mvm->queue_info[queue].tid_bitmap); 851 852 return enable_queue; 853 } 854 855 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 856 int queue, u16 ssn, 857 const struct iwl_trans_txq_scd_cfg *cfg, 858 unsigned int wdg_timeout) 859 { 860 struct iwl_scd_txq_cfg_cmd cmd = { 861 .scd_queue = queue, 862 .action = SCD_CFG_ENABLE_QUEUE, 863 .window = cfg->frame_limit, 864 .sta_id = cfg->sta_id, 865 .ssn = cpu_to_le16(ssn), 866 .tx_fifo = cfg->fifo, 867 .aggregate = cfg->aggregate, 868 .tid = cfg->tid, 869 }; 870 bool inc_ssn; 871 872 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 873 return false; 874 875 /* Send the enabling command if we need to */ 876 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid)) 877 return false; 878 879 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, 880 NULL, wdg_timeout); 881 if (inc_ssn) 882 le16_add_cpu(&cmd.ssn, 1); 883 884 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), 885 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo); 886 887 return inc_ssn; 888 } 889 890 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue) 891 { 892 struct iwl_scd_txq_cfg_cmd cmd = { 893 .scd_queue = queue, 894 .action = SCD_CFG_UPDATE_QUEUE_TID, 895 }; 896 int tid; 897 unsigned long tid_bitmap; 898 int ret; 899 900 lockdep_assert_held(&mvm->mutex); 901 902 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 903 return; 904 905 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 906 907 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 908 return; 909 910 /* Find any TID for queue */ 911 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 912 cmd.tid = tid; 913 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 914 915 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 916 if (ret) { 917 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 918 queue, ret); 919 return; 920 } 921 922 mvm->queue_info[queue].txq_tid = tid; 923 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 924 queue, tid); 925 } 926 927 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 928 { 929 struct ieee80211_sta *sta; 930 struct iwl_mvm_sta *mvmsta; 931 u8 sta_id; 932 int tid = -1; 933 unsigned long tid_bitmap; 934 unsigned int wdg_timeout; 935 int ssn; 936 int ret = true; 937 938 /* queue sharing is disabled on new TX path */ 939 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 940 return; 941 942 lockdep_assert_held(&mvm->mutex); 943 944 sta_id = mvm->queue_info[queue].ra_sta_id; 945 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 946 947 /* Find TID for queue, and make sure it is the only one on the queue */ 948 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 949 if (tid_bitmap != BIT(tid)) { 950 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 951 queue, tid_bitmap); 952 return; 953 } 954 955 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 956 tid); 957 958 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 959 lockdep_is_held(&mvm->mutex)); 960 961 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 962 return; 963 964 mvmsta = iwl_mvm_sta_from_mac80211(sta); 965 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 966 967 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 968 969 ret = iwl_mvm_redirect_queue(mvm, queue, tid, 970 tid_to_mac80211_ac[tid], ssn, 971 wdg_timeout, true, 972 iwl_mvm_txq_from_tid(sta, tid)); 973 if (ret) { 974 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 975 return; 976 } 977 978 /* If aggs should be turned back on - do it */ 979 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 980 struct iwl_mvm_add_sta_cmd cmd = {0}; 981 982 mvmsta->tid_disable_agg &= ~BIT(tid); 983 984 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 985 cmd.sta_id = mvmsta->sta_id; 986 cmd.add_modify = STA_MODE_MODIFY; 987 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 988 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 989 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 990 991 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 992 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 993 if (!ret) { 994 IWL_DEBUG_TX_QUEUES(mvm, 995 "TXQ #%d is now aggregated again\n", 996 queue); 997 998 /* Mark queue intenally as aggregating again */ 999 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1000 } 1001 } 1002 1003 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1004 } 1005 1006 /* 1007 * Remove inactive TIDs of a given queue. 1008 * If all queue TIDs are inactive - mark the queue as inactive 1009 * If only some the queue TIDs are inactive - unmap them from the queue 1010 * 1011 * Returns %true if all TIDs were removed and the queue could be reused. 1012 */ 1013 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, 1014 struct iwl_mvm_sta *mvmsta, int queue, 1015 unsigned long tid_bitmap, 1016 unsigned long *unshare_queues, 1017 unsigned long *changetid_queues) 1018 { 1019 int tid; 1020 1021 lockdep_assert_held(&mvmsta->lock); 1022 lockdep_assert_held(&mvm->mutex); 1023 1024 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1025 return false; 1026 1027 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */ 1028 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1029 /* If some TFDs are still queued - don't mark TID as inactive */ 1030 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid])) 1031 tid_bitmap &= ~BIT(tid); 1032 1033 /* Don't mark as inactive any TID that has an active BA */ 1034 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) 1035 tid_bitmap &= ~BIT(tid); 1036 } 1037 1038 /* If all TIDs in the queue are inactive - return it can be reused */ 1039 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) { 1040 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); 1041 return true; 1042 } 1043 1044 /* 1045 * If we are here, this is a shared queue and not all TIDs timed-out. 1046 * Remove the ones that did. 1047 */ 1048 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1049 u16 tid_bitmap; 1050 1051 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 1052 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid); 1053 1054 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1055 1056 /* 1057 * We need to take into account a situation in which a TXQ was 1058 * allocated to TID x, and then turned shared by adding TIDs y 1059 * and z. If TID x becomes inactive and is removed from the TXQ, 1060 * ownership must be given to one of the remaining TIDs. 1061 * This is mainly because if TID x continues - a new queue can't 1062 * be allocated for it as long as it is an owner of another TXQ. 1063 * 1064 * Mark this queue in the right bitmap, we'll send the command 1065 * to the firmware later. 1066 */ 1067 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid))) 1068 set_bit(queue, changetid_queues); 1069 1070 IWL_DEBUG_TX_QUEUES(mvm, 1071 "Removing inactive TID %d from shared Q:%d\n", 1072 tid, queue); 1073 } 1074 1075 IWL_DEBUG_TX_QUEUES(mvm, 1076 "TXQ #%d left with tid bitmap 0x%x\n", queue, 1077 mvm->queue_info[queue].tid_bitmap); 1078 1079 /* 1080 * There may be different TIDs with the same mac queues, so make 1081 * sure all TIDs have existing corresponding mac queues enabled 1082 */ 1083 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1084 1085 /* If the queue is marked as shared - "unshare" it */ 1086 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 && 1087 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) { 1088 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n", 1089 queue); 1090 set_bit(queue, unshare_queues); 1091 } 1092 1093 return false; 1094 } 1095 1096 /* 1097 * Check for inactivity - this includes checking if any queue 1098 * can be unshared and finding one (and only one) that can be 1099 * reused. 1100 * This function is also invoked as a sort of clean-up task, 1101 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA. 1102 * 1103 * Returns the queue number, or -ENOSPC. 1104 */ 1105 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta) 1106 { 1107 unsigned long now = jiffies; 1108 unsigned long unshare_queues = 0; 1109 unsigned long changetid_queues = 0; 1110 int i, ret, free_queue = -ENOSPC; 1111 struct ieee80211_sta *queue_owner = NULL; 1112 1113 lockdep_assert_held(&mvm->mutex); 1114 1115 if (iwl_mvm_has_new_tx_api(mvm)) 1116 return -ENOSPC; 1117 1118 rcu_read_lock(); 1119 1120 /* we skip the CMD queue below by starting at 1 */ 1121 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0); 1122 1123 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { 1124 struct ieee80211_sta *sta; 1125 struct iwl_mvm_sta *mvmsta; 1126 u8 sta_id; 1127 int tid; 1128 unsigned long inactive_tid_bitmap = 0; 1129 unsigned long queue_tid_bitmap; 1130 1131 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; 1132 if (!queue_tid_bitmap) 1133 continue; 1134 1135 /* If TXQ isn't in active use anyway - nothing to do here... */ 1136 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY && 1137 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) 1138 continue; 1139 1140 /* Check to see if there are inactive TIDs on this queue */ 1141 for_each_set_bit(tid, &queue_tid_bitmap, 1142 IWL_MAX_TID_COUNT + 1) { 1143 if (time_after(mvm->queue_info[i].last_frame_time[tid] + 1144 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1145 continue; 1146 1147 inactive_tid_bitmap |= BIT(tid); 1148 } 1149 1150 /* If all TIDs are active - finish check on this queue */ 1151 if (!inactive_tid_bitmap) 1152 continue; 1153 1154 /* 1155 * If we are here - the queue hadn't been served recently and is 1156 * in use 1157 */ 1158 1159 sta_id = mvm->queue_info[i].ra_sta_id; 1160 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1161 1162 /* 1163 * If the STA doesn't exist anymore, it isn't an error. It could 1164 * be that it was removed since getting the queues, and in this 1165 * case it should've inactivated its queues anyway. 1166 */ 1167 if (IS_ERR_OR_NULL(sta)) 1168 continue; 1169 1170 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1171 1172 spin_lock_bh(&mvmsta->lock); 1173 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i, 1174 inactive_tid_bitmap, 1175 &unshare_queues, 1176 &changetid_queues); 1177 if (ret && free_queue < 0) { 1178 queue_owner = sta; 1179 free_queue = i; 1180 } 1181 /* only unlock sta lock - we still need the queue info lock */ 1182 spin_unlock_bh(&mvmsta->lock); 1183 } 1184 1185 1186 /* Reconfigure queues requiring reconfiguation */ 1187 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES) 1188 iwl_mvm_unshare_queue(mvm, i); 1189 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES) 1190 iwl_mvm_change_queue_tid(mvm, i); 1191 1192 rcu_read_unlock(); 1193 1194 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) { 1195 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner, 1196 alloc_for_sta); 1197 if (ret) 1198 return ret; 1199 } 1200 1201 return free_queue; 1202 } 1203 1204 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 1205 struct ieee80211_sta *sta, u8 ac, int tid) 1206 { 1207 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1208 struct iwl_trans_txq_scd_cfg cfg = { 1209 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 1210 .sta_id = mvmsta->sta_id, 1211 .tid = tid, 1212 .frame_limit = IWL_FRAME_LIMIT, 1213 }; 1214 unsigned int wdg_timeout = 1215 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1216 int queue = -1; 1217 unsigned long disable_agg_tids = 0; 1218 enum iwl_mvm_agg_state queue_state; 1219 bool shared_queue = false, inc_ssn; 1220 int ssn; 1221 unsigned long tfd_queue_mask; 1222 int ret; 1223 1224 lockdep_assert_held(&mvm->mutex); 1225 1226 if (iwl_mvm_has_new_tx_api(mvm)) 1227 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 1228 1229 spin_lock_bh(&mvmsta->lock); 1230 tfd_queue_mask = mvmsta->tfd_queue_msk; 1231 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1232 spin_unlock_bh(&mvmsta->lock); 1233 1234 if (tid == IWL_MAX_TID_COUNT) { 1235 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1236 IWL_MVM_DQA_MIN_MGMT_QUEUE, 1237 IWL_MVM_DQA_MAX_MGMT_QUEUE); 1238 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 1239 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 1240 queue); 1241 1242 /* If no such queue is found, we'll use a DATA queue instead */ 1243 } 1244 1245 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 1246 (mvm->queue_info[mvmsta->reserved_queue].status == 1247 IWL_MVM_QUEUE_RESERVED)) { 1248 queue = mvmsta->reserved_queue; 1249 mvm->queue_info[queue].reserved = true; 1250 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 1251 } 1252 1253 if (queue < 0) 1254 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1255 IWL_MVM_DQA_MIN_DATA_QUEUE, 1256 IWL_MVM_DQA_MAX_DATA_QUEUE); 1257 if (queue < 0) { 1258 /* try harder - perhaps kill an inactive queue */ 1259 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1260 } 1261 1262 /* No free queue - we'll have to share */ 1263 if (queue <= 0) { 1264 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 1265 if (queue > 0) { 1266 shared_queue = true; 1267 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 1268 } 1269 } 1270 1271 /* 1272 * Mark TXQ as ready, even though it hasn't been fully configured yet, 1273 * to make sure no one else takes it. 1274 * This will allow avoiding re-acquiring the lock at the end of the 1275 * configuration. On error we'll mark it back as free. 1276 */ 1277 if (queue > 0 && !shared_queue) 1278 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1279 1280 /* This shouldn't happen - out of queues */ 1281 if (WARN_ON(queue <= 0)) { 1282 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 1283 tid, cfg.sta_id); 1284 return queue; 1285 } 1286 1287 /* 1288 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 1289 * but for configuring the SCD to send A-MPDUs we need to mark the queue 1290 * as aggregatable. 1291 * Mark all DATA queues as allowing to be aggregated at some point 1292 */ 1293 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1294 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1295 1296 IWL_DEBUG_TX_QUEUES(mvm, 1297 "Allocating %squeue #%d to sta %d on tid %d\n", 1298 shared_queue ? "shared " : "", queue, 1299 mvmsta->sta_id, tid); 1300 1301 if (shared_queue) { 1302 /* Disable any open aggs on this queue */ 1303 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 1304 1305 if (disable_agg_tids) { 1306 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 1307 queue); 1308 iwl_mvm_invalidate_sta_queue(mvm, queue, 1309 disable_agg_tids, false); 1310 } 1311 } 1312 1313 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout); 1314 1315 /* 1316 * Mark queue as shared in transport if shared 1317 * Note this has to be done after queue enablement because enablement 1318 * can also set this value, and there is no indication there to shared 1319 * queues 1320 */ 1321 if (shared_queue) 1322 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 1323 1324 spin_lock_bh(&mvmsta->lock); 1325 /* 1326 * This looks racy, but it is not. We have only one packet for 1327 * this ra/tid in our Tx path since we stop the Qdisc when we 1328 * need to allocate a new TFD queue. 1329 */ 1330 if (inc_ssn) { 1331 mvmsta->tid_data[tid].seq_number += 0x10; 1332 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 1333 } 1334 mvmsta->tid_data[tid].txq_id = queue; 1335 mvmsta->tfd_queue_msk |= BIT(queue); 1336 queue_state = mvmsta->tid_data[tid].state; 1337 1338 if (mvmsta->reserved_queue == queue) 1339 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 1340 spin_unlock_bh(&mvmsta->lock); 1341 1342 if (!shared_queue) { 1343 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 1344 if (ret) 1345 goto out_err; 1346 1347 /* If we need to re-enable aggregations... */ 1348 if (queue_state == IWL_AGG_ON) { 1349 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1350 if (ret) 1351 goto out_err; 1352 } 1353 } else { 1354 /* Redirect queue, if needed */ 1355 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn, 1356 wdg_timeout, false, 1357 iwl_mvm_txq_from_tid(sta, tid)); 1358 if (ret) 1359 goto out_err; 1360 } 1361 1362 return 0; 1363 1364 out_err: 1365 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0); 1366 1367 return ret; 1368 } 1369 1370 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1371 { 1372 if (tid == IWL_MAX_TID_COUNT) 1373 return IEEE80211_AC_VO; /* MGMT */ 1374 1375 return tid_to_mac80211_ac[tid]; 1376 } 1377 1378 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1379 { 1380 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1381 add_stream_wk); 1382 1383 mutex_lock(&mvm->mutex); 1384 1385 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1386 1387 while (!list_empty(&mvm->add_stream_txqs)) { 1388 struct iwl_mvm_txq *mvmtxq; 1389 struct ieee80211_txq *txq; 1390 u8 tid; 1391 1392 mvmtxq = list_first_entry(&mvm->add_stream_txqs, 1393 struct iwl_mvm_txq, list); 1394 1395 txq = container_of((void *)mvmtxq, struct ieee80211_txq, 1396 drv_priv); 1397 tid = txq->tid; 1398 if (tid == IEEE80211_NUM_TIDS) 1399 tid = IWL_MAX_TID_COUNT; 1400 1401 /* 1402 * We can't really do much here, but if this fails we can't 1403 * transmit anyway - so just don't transmit the frame etc. 1404 * and let them back up ... we've tried our best to allocate 1405 * a queue in the function itself. 1406 */ 1407 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) { 1408 list_del_init(&mvmtxq->list); 1409 continue; 1410 } 1411 1412 list_del_init(&mvmtxq->list); 1413 local_bh_disable(); 1414 iwl_mvm_mac_itxq_xmit(mvm->hw, txq); 1415 local_bh_enable(); 1416 } 1417 1418 mutex_unlock(&mvm->mutex); 1419 } 1420 1421 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1422 struct ieee80211_sta *sta, 1423 enum nl80211_iftype vif_type) 1424 { 1425 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1426 int queue; 1427 1428 /* queue reserving is disabled on new TX path */ 1429 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1430 return 0; 1431 1432 /* run the general cleanup/unsharing of queues */ 1433 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA); 1434 1435 /* Make sure we have free resources for this STA */ 1436 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1437 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap && 1438 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1439 IWL_MVM_QUEUE_FREE)) 1440 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1441 else 1442 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1443 IWL_MVM_DQA_MIN_DATA_QUEUE, 1444 IWL_MVM_DQA_MAX_DATA_QUEUE); 1445 if (queue < 0) { 1446 /* try again - this time kick out a queue if needed */ 1447 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id); 1448 if (queue < 0) { 1449 IWL_ERR(mvm, "No available queues for new station\n"); 1450 return -ENOSPC; 1451 } 1452 } 1453 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1454 1455 mvmsta->reserved_queue = queue; 1456 1457 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1458 queue, mvmsta->sta_id); 1459 1460 return 0; 1461 } 1462 1463 /* 1464 * In DQA mode, after a HW restart the queues should be allocated as before, in 1465 * order to avoid race conditions when there are shared queues. This function 1466 * does the re-mapping and queue allocation. 1467 * 1468 * Note that re-enabling aggregations isn't done in this function. 1469 */ 1470 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1471 struct ieee80211_sta *sta) 1472 { 1473 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1474 unsigned int wdg = 1475 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1476 int i; 1477 struct iwl_trans_txq_scd_cfg cfg = { 1478 .sta_id = mvm_sta->sta_id, 1479 .frame_limit = IWL_FRAME_LIMIT, 1480 }; 1481 1482 /* Make sure reserved queue is still marked as such (if allocated) */ 1483 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1484 mvm->queue_info[mvm_sta->reserved_queue].status = 1485 IWL_MVM_QUEUE_RESERVED; 1486 1487 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1488 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1489 int txq_id = tid_data->txq_id; 1490 int ac; 1491 1492 if (txq_id == IWL_MVM_INVALID_QUEUE) 1493 continue; 1494 1495 ac = tid_to_mac80211_ac[i]; 1496 1497 if (iwl_mvm_has_new_tx_api(mvm)) { 1498 IWL_DEBUG_TX_QUEUES(mvm, 1499 "Re-mapping sta %d tid %d\n", 1500 mvm_sta->sta_id, i); 1501 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id, 1502 i, wdg); 1503 /* 1504 * on failures, just set it to IWL_MVM_INVALID_QUEUE 1505 * to try again later, we have no other good way of 1506 * failing here 1507 */ 1508 if (txq_id < 0) 1509 txq_id = IWL_MVM_INVALID_QUEUE; 1510 tid_data->txq_id = txq_id; 1511 1512 /* 1513 * Since we don't set the seq number after reset, and HW 1514 * sets it now, FW reset will cause the seq num to start 1515 * at 0 again, so driver will need to update it 1516 * internally as well, so it keeps in sync with real val 1517 */ 1518 tid_data->seq_number = 0; 1519 } else { 1520 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1521 1522 cfg.tid = i; 1523 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1524 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1525 txq_id == 1526 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1527 1528 IWL_DEBUG_TX_QUEUES(mvm, 1529 "Re-mapping sta %d tid %d to queue %d\n", 1530 mvm_sta->sta_id, i, txq_id); 1531 1532 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg); 1533 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1534 } 1535 } 1536 } 1537 1538 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1539 struct iwl_mvm_int_sta *sta, 1540 const u8 *addr, 1541 u16 mac_id, u16 color) 1542 { 1543 struct iwl_mvm_add_sta_cmd cmd; 1544 int ret; 1545 u32 status = ADD_STA_SUCCESS; 1546 1547 lockdep_assert_held(&mvm->mutex); 1548 1549 memset(&cmd, 0, sizeof(cmd)); 1550 cmd.sta_id = sta->sta_id; 1551 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1552 color)); 1553 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1554 cmd.station_type = sta->type; 1555 1556 if (!iwl_mvm_has_new_tx_api(mvm)) 1557 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1558 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1559 1560 if (addr) 1561 memcpy(cmd.addr, addr, ETH_ALEN); 1562 1563 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1564 iwl_mvm_add_sta_cmd_size(mvm), 1565 &cmd, &status); 1566 if (ret) 1567 return ret; 1568 1569 switch (status & IWL_ADD_STA_STATUS_MASK) { 1570 case ADD_STA_SUCCESS: 1571 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1572 return 0; 1573 default: 1574 ret = -EIO; 1575 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1576 status); 1577 break; 1578 } 1579 return ret; 1580 } 1581 1582 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1583 struct ieee80211_vif *vif, 1584 struct ieee80211_sta *sta) 1585 { 1586 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1587 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1588 struct iwl_mvm_rxq_dup_data *dup_data; 1589 int i, ret, sta_id; 1590 bool sta_update = false; 1591 unsigned int sta_flags = 0; 1592 1593 lockdep_assert_held(&mvm->mutex); 1594 1595 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1596 sta_id = iwl_mvm_find_free_sta_id(mvm, 1597 ieee80211_vif_type_p2p(vif)); 1598 else 1599 sta_id = mvm_sta->sta_id; 1600 1601 if (sta_id == IWL_MVM_INVALID_STA) 1602 return -ENOSPC; 1603 1604 spin_lock_init(&mvm_sta->lock); 1605 1606 /* if this is a HW restart re-alloc existing queues */ 1607 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1608 struct iwl_mvm_int_sta tmp_sta = { 1609 .sta_id = sta_id, 1610 .type = mvm_sta->sta_type, 1611 }; 1612 1613 /* 1614 * First add an empty station since allocating 1615 * a queue requires a valid station 1616 */ 1617 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1618 mvmvif->id, mvmvif->color); 1619 if (ret) 1620 goto err; 1621 1622 iwl_mvm_realloc_queues_after_restart(mvm, sta); 1623 sta_update = true; 1624 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1625 goto update_fw; 1626 } 1627 1628 mvm_sta->sta_id = sta_id; 1629 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1630 mvmvif->color); 1631 mvm_sta->vif = vif; 1632 if (!mvm->trans->trans_cfg->gen2) 1633 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1634 else 1635 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1636 mvm_sta->tx_protection = 0; 1637 mvm_sta->tt_tx_protection = false; 1638 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1639 1640 /* HW restart, don't assume the memory has been zeroed */ 1641 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1642 mvm_sta->tfd_queue_msk = 0; 1643 1644 /* for HW restart - reset everything but the sequence number */ 1645 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1646 u16 seq = mvm_sta->tid_data[i].seq_number; 1647 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1648 mvm_sta->tid_data[i].seq_number = seq; 1649 1650 /* 1651 * Mark all queues for this STA as unallocated and defer TX 1652 * frames until the queue is allocated 1653 */ 1654 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1655 } 1656 1657 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1658 struct iwl_mvm_txq *mvmtxq = 1659 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1660 1661 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1662 INIT_LIST_HEAD(&mvmtxq->list); 1663 atomic_set(&mvmtxq->tx_request, 0); 1664 } 1665 1666 mvm_sta->agg_tids = 0; 1667 1668 if (iwl_mvm_has_new_rx_api(mvm) && 1669 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1670 int q; 1671 1672 dup_data = kcalloc(mvm->trans->num_rx_queues, 1673 sizeof(*dup_data), GFP_KERNEL); 1674 if (!dup_data) 1675 return -ENOMEM; 1676 /* 1677 * Initialize all the last_seq values to 0xffff which can never 1678 * compare equal to the frame's seq_ctrl in the check in 1679 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1680 * number and fragmented packets don't reach that function. 1681 * 1682 * This thus allows receiving a packet with seqno 0 and the 1683 * retry bit set as the very first packet on a new TID. 1684 */ 1685 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1686 memset(dup_data[q].last_seq, 0xff, 1687 sizeof(dup_data[q].last_seq)); 1688 mvm_sta->dup_data = dup_data; 1689 } 1690 1691 if (!iwl_mvm_has_new_tx_api(mvm)) { 1692 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1693 ieee80211_vif_type_p2p(vif)); 1694 if (ret) 1695 goto err; 1696 } 1697 1698 /* 1699 * if rs is registered with mac80211, then "add station" will be handled 1700 * via the corresponding ops, otherwise need to notify rate scaling here 1701 */ 1702 if (iwl_mvm_has_tlc_offload(mvm)) 1703 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1704 else 1705 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock); 1706 1707 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant); 1708 1709 update_fw: 1710 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1711 if (ret) 1712 goto err; 1713 1714 if (vif->type == NL80211_IFTYPE_STATION) { 1715 if (!sta->tdls) { 1716 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1717 mvmvif->ap_sta_id = sta_id; 1718 } else { 1719 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1720 } 1721 } 1722 1723 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1724 1725 return 0; 1726 1727 err: 1728 return ret; 1729 } 1730 1731 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1732 bool drain) 1733 { 1734 struct iwl_mvm_add_sta_cmd cmd = {}; 1735 int ret; 1736 u32 status; 1737 1738 lockdep_assert_held(&mvm->mutex); 1739 1740 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1741 cmd.sta_id = mvmsta->sta_id; 1742 cmd.add_modify = STA_MODE_MODIFY; 1743 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1744 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1745 1746 status = ADD_STA_SUCCESS; 1747 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1748 iwl_mvm_add_sta_cmd_size(mvm), 1749 &cmd, &status); 1750 if (ret) 1751 return ret; 1752 1753 switch (status & IWL_ADD_STA_STATUS_MASK) { 1754 case ADD_STA_SUCCESS: 1755 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1756 mvmsta->sta_id); 1757 break; 1758 default: 1759 ret = -EIO; 1760 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1761 mvmsta->sta_id); 1762 break; 1763 } 1764 1765 return ret; 1766 } 1767 1768 /* 1769 * Remove a station from the FW table. Before sending the command to remove 1770 * the station validate that the station is indeed known to the driver (sanity 1771 * only). 1772 */ 1773 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1774 { 1775 struct ieee80211_sta *sta; 1776 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1777 .sta_id = sta_id, 1778 }; 1779 int ret; 1780 1781 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1782 lockdep_is_held(&mvm->mutex)); 1783 1784 /* Note: internal stations are marked as error values */ 1785 if (!sta) { 1786 IWL_ERR(mvm, "Invalid station id\n"); 1787 return -EINVAL; 1788 } 1789 1790 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1791 sizeof(rm_sta_cmd), &rm_sta_cmd); 1792 if (ret) { 1793 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1794 return ret; 1795 } 1796 1797 return 0; 1798 } 1799 1800 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1801 struct ieee80211_vif *vif, 1802 struct ieee80211_sta *sta) 1803 { 1804 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1805 int i; 1806 1807 lockdep_assert_held(&mvm->mutex); 1808 1809 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1810 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1811 continue; 1812 1813 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i, 1814 0); 1815 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1816 } 1817 1818 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 1819 struct iwl_mvm_txq *mvmtxq = 1820 iwl_mvm_txq_from_mac80211(sta->txq[i]); 1821 1822 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE; 1823 } 1824 } 1825 1826 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1827 struct iwl_mvm_sta *mvm_sta) 1828 { 1829 int i; 1830 1831 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1832 u16 txq_id; 1833 int ret; 1834 1835 spin_lock_bh(&mvm_sta->lock); 1836 txq_id = mvm_sta->tid_data[i].txq_id; 1837 spin_unlock_bh(&mvm_sta->lock); 1838 1839 if (txq_id == IWL_MVM_INVALID_QUEUE) 1840 continue; 1841 1842 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1843 if (ret) 1844 return ret; 1845 } 1846 1847 return 0; 1848 } 1849 1850 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1851 struct ieee80211_vif *vif, 1852 struct ieee80211_sta *sta) 1853 { 1854 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1855 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1856 u8 sta_id = mvm_sta->sta_id; 1857 int ret; 1858 1859 lockdep_assert_held(&mvm->mutex); 1860 1861 if (iwl_mvm_has_new_rx_api(mvm)) 1862 kfree(mvm_sta->dup_data); 1863 1864 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1865 if (ret) 1866 return ret; 1867 1868 /* flush its queues here since we are freeing mvm_sta */ 1869 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1870 if (ret) 1871 return ret; 1872 if (iwl_mvm_has_new_tx_api(mvm)) { 1873 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1874 } else { 1875 u32 q_mask = mvm_sta->tfd_queue_msk; 1876 1877 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1878 q_mask); 1879 } 1880 if (ret) 1881 return ret; 1882 1883 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1884 1885 iwl_mvm_disable_sta_queues(mvm, vif, sta); 1886 1887 /* If there is a TXQ still marked as reserved - free it */ 1888 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1889 u8 reserved_txq = mvm_sta->reserved_queue; 1890 enum iwl_mvm_queue_status *status; 1891 1892 /* 1893 * If no traffic has gone through the reserved TXQ - it 1894 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1895 * should be manually marked as free again 1896 */ 1897 status = &mvm->queue_info[reserved_txq].status; 1898 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1899 (*status != IWL_MVM_QUEUE_FREE), 1900 "sta_id %d reserved txq %d status %d", 1901 sta_id, reserved_txq, *status)) 1902 return -EINVAL; 1903 1904 *status = IWL_MVM_QUEUE_FREE; 1905 } 1906 1907 if (vif->type == NL80211_IFTYPE_STATION && 1908 mvmvif->ap_sta_id == sta_id) { 1909 /* if associated - we can't remove the AP STA now */ 1910 if (vif->bss_conf.assoc) 1911 return ret; 1912 1913 /* unassoc - go ahead - remove the AP STA now */ 1914 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1915 } 1916 1917 /* 1918 * This shouldn't happen - the TDLS channel switch should be canceled 1919 * before the STA is removed. 1920 */ 1921 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1922 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1923 cancel_delayed_work(&mvm->tdls_cs.dwork); 1924 } 1925 1926 /* 1927 * Make sure that the tx response code sees the station as -EBUSY and 1928 * calls the drain worker. 1929 */ 1930 spin_lock_bh(&mvm_sta->lock); 1931 spin_unlock_bh(&mvm_sta->lock); 1932 1933 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1934 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1935 1936 return ret; 1937 } 1938 1939 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1940 struct ieee80211_vif *vif, 1941 u8 sta_id) 1942 { 1943 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1944 1945 lockdep_assert_held(&mvm->mutex); 1946 1947 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1948 return ret; 1949 } 1950 1951 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1952 struct iwl_mvm_int_sta *sta, 1953 u32 qmask, enum nl80211_iftype iftype, 1954 enum iwl_sta_type type) 1955 { 1956 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1957 sta->sta_id == IWL_MVM_INVALID_STA) { 1958 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1959 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1960 return -ENOSPC; 1961 } 1962 1963 sta->tfd_queue_msk = qmask; 1964 sta->type = type; 1965 1966 /* put a non-NULL value so iterating over the stations won't stop */ 1967 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1968 return 0; 1969 } 1970 1971 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1972 { 1973 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1974 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1975 sta->sta_id = IWL_MVM_INVALID_STA; 1976 } 1977 1978 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue, 1979 u8 sta_id, u8 fifo) 1980 { 1981 unsigned int wdg_timeout = 1982 mvm->trans->trans_cfg->base_params->wd_timeout; 1983 struct iwl_trans_txq_scd_cfg cfg = { 1984 .fifo = fifo, 1985 .sta_id = sta_id, 1986 .tid = IWL_MAX_TID_COUNT, 1987 .aggregate = false, 1988 .frame_limit = IWL_FRAME_LIMIT, 1989 }; 1990 1991 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1992 1993 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 1994 } 1995 1996 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id) 1997 { 1998 unsigned int wdg_timeout = 1999 mvm->trans->trans_cfg->base_params->wd_timeout; 2000 2001 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2002 2003 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT, 2004 wdg_timeout); 2005 } 2006 2007 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, 2008 int maccolor, 2009 struct iwl_mvm_int_sta *sta, 2010 u16 *queue, int fifo) 2011 { 2012 int ret; 2013 2014 /* Map queue to fifo - needs to happen before adding station */ 2015 if (!iwl_mvm_has_new_tx_api(mvm)) 2016 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo); 2017 2018 ret = iwl_mvm_add_int_sta_common(mvm, sta, NULL, macidx, maccolor); 2019 if (ret) { 2020 if (!iwl_mvm_has_new_tx_api(mvm)) 2021 iwl_mvm_disable_txq(mvm, NULL, *queue, 2022 IWL_MAX_TID_COUNT, 0); 2023 return ret; 2024 } 2025 2026 /* 2027 * For 22000 firmware and on we cannot add queue to a station unknown 2028 * to firmware so enable queue here - after the station was added 2029 */ 2030 if (iwl_mvm_has_new_tx_api(mvm)) { 2031 int txq; 2032 2033 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id); 2034 if (txq < 0) { 2035 iwl_mvm_rm_sta_common(mvm, sta->sta_id); 2036 return txq; 2037 } 2038 2039 *queue = txq; 2040 } 2041 2042 return 0; 2043 } 2044 2045 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 2046 { 2047 int ret; 2048 2049 lockdep_assert_held(&mvm->mutex); 2050 2051 /* Allocate aux station and assign to it the aux queue */ 2052 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 2053 NL80211_IFTYPE_UNSPECIFIED, 2054 IWL_STA_AUX_ACTIVITY); 2055 if (ret) 2056 return ret; 2057 2058 ret = iwl_mvm_add_int_sta_with_queue(mvm, MAC_INDEX_AUX, 0, 2059 &mvm->aux_sta, &mvm->aux_queue, 2060 IWL_MVM_TX_FIFO_MCAST); 2061 if (ret) { 2062 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2063 return ret; 2064 } 2065 2066 return 0; 2067 } 2068 2069 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2070 { 2071 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2072 2073 lockdep_assert_held(&mvm->mutex); 2074 2075 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color, 2076 &mvm->snif_sta, &mvm->snif_queue, 2077 IWL_MVM_TX_FIFO_BE); 2078 } 2079 2080 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2081 { 2082 int ret; 2083 2084 lockdep_assert_held(&mvm->mutex); 2085 2086 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0); 2087 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 2088 if (ret) 2089 IWL_WARN(mvm, "Failed sending remove station\n"); 2090 2091 return ret; 2092 } 2093 2094 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm) 2095 { 2096 int ret; 2097 2098 lockdep_assert_held(&mvm->mutex); 2099 2100 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_queue, IWL_MAX_TID_COUNT, 0); 2101 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id); 2102 if (ret) 2103 IWL_WARN(mvm, "Failed sending remove station\n"); 2104 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 2105 2106 return ret; 2107 } 2108 2109 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 2110 { 2111 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 2112 } 2113 2114 /* 2115 * Send the add station command for the vif's broadcast station. 2116 * Assumes that the station was already allocated. 2117 * 2118 * @mvm: the mvm component 2119 * @vif: the interface to which the broadcast station is added 2120 * @bsta: the broadcast station to add. 2121 */ 2122 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2123 { 2124 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2125 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2126 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 2127 const u8 *baddr = _baddr; 2128 int queue; 2129 int ret; 2130 unsigned int wdg_timeout = 2131 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2132 struct iwl_trans_txq_scd_cfg cfg = { 2133 .fifo = IWL_MVM_TX_FIFO_VO, 2134 .sta_id = mvmvif->bcast_sta.sta_id, 2135 .tid = IWL_MAX_TID_COUNT, 2136 .aggregate = false, 2137 .frame_limit = IWL_FRAME_LIMIT, 2138 }; 2139 2140 lockdep_assert_held(&mvm->mutex); 2141 2142 if (!iwl_mvm_has_new_tx_api(mvm)) { 2143 if (vif->type == NL80211_IFTYPE_AP || 2144 vif->type == NL80211_IFTYPE_ADHOC) { 2145 queue = mvm->probe_queue; 2146 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2147 queue = mvm->p2p_dev_queue; 2148 } else { 2149 WARN(1, "Missing required TXQ for adding bcast STA\n"); 2150 return -EINVAL; 2151 } 2152 2153 bsta->tfd_queue_msk |= BIT(queue); 2154 2155 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout); 2156 } 2157 2158 if (vif->type == NL80211_IFTYPE_ADHOC) 2159 baddr = vif->bss_conf.bssid; 2160 2161 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2162 return -ENOSPC; 2163 2164 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2165 mvmvif->id, mvmvif->color); 2166 if (ret) 2167 return ret; 2168 2169 /* 2170 * For 22000 firmware and on we cannot add queue to a station unknown 2171 * to firmware so enable queue here - after the station was added 2172 */ 2173 if (iwl_mvm_has_new_tx_api(mvm)) { 2174 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id, 2175 IWL_MAX_TID_COUNT, 2176 wdg_timeout); 2177 if (queue < 0) { 2178 iwl_mvm_rm_sta_common(mvm, bsta->sta_id); 2179 return queue; 2180 } 2181 2182 if (vif->type == NL80211_IFTYPE_AP || 2183 vif->type == NL80211_IFTYPE_ADHOC) 2184 mvm->probe_queue = queue; 2185 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2186 mvm->p2p_dev_queue = queue; 2187 } 2188 2189 return 0; 2190 } 2191 2192 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2193 struct ieee80211_vif *vif) 2194 { 2195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2196 int queue; 2197 2198 lockdep_assert_held(&mvm->mutex); 2199 2200 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2201 2202 switch (vif->type) { 2203 case NL80211_IFTYPE_AP: 2204 case NL80211_IFTYPE_ADHOC: 2205 queue = mvm->probe_queue; 2206 break; 2207 case NL80211_IFTYPE_P2P_DEVICE: 2208 queue = mvm->p2p_dev_queue; 2209 break; 2210 default: 2211 WARN(1, "Can't free bcast queue on vif type %d\n", 2212 vif->type); 2213 return; 2214 } 2215 2216 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0); 2217 if (iwl_mvm_has_new_tx_api(mvm)) 2218 return; 2219 2220 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2221 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2222 } 2223 2224 /* Send the FW a request to remove the station from it's internal data 2225 * structures, but DO NOT remove the entry from the local data structures. */ 2226 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2227 { 2228 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2229 int ret; 2230 2231 lockdep_assert_held(&mvm->mutex); 2232 2233 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2234 2235 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2236 if (ret) 2237 IWL_WARN(mvm, "Failed sending remove station\n"); 2238 return ret; 2239 } 2240 2241 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2242 { 2243 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2244 2245 lockdep_assert_held(&mvm->mutex); 2246 2247 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 2248 ieee80211_vif_type_p2p(vif), 2249 IWL_STA_GENERAL_PURPOSE); 2250 } 2251 2252 /* Allocate a new station entry for the broadcast station to the given vif, 2253 * and send it to the FW. 2254 * Note that each P2P mac should have its own broadcast station. 2255 * 2256 * @mvm: the mvm component 2257 * @vif: the interface to which the broadcast station is added 2258 * @bsta: the broadcast station to add. */ 2259 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2260 { 2261 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2262 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2263 int ret; 2264 2265 lockdep_assert_held(&mvm->mutex); 2266 2267 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2268 if (ret) 2269 return ret; 2270 2271 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2272 2273 if (ret) 2274 iwl_mvm_dealloc_int_sta(mvm, bsta); 2275 2276 return ret; 2277 } 2278 2279 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2280 { 2281 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2282 2283 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2284 } 2285 2286 /* 2287 * Send the FW a request to remove the station from it's internal data 2288 * structures, and in addition remove it from the local data structure. 2289 */ 2290 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2291 { 2292 int ret; 2293 2294 lockdep_assert_held(&mvm->mutex); 2295 2296 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2297 2298 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2299 2300 return ret; 2301 } 2302 2303 /* 2304 * Allocate a new station entry for the multicast station to the given vif, 2305 * and send it to the FW. 2306 * Note that each AP/GO mac should have its own multicast station. 2307 * 2308 * @mvm: the mvm component 2309 * @vif: the interface to which the multicast station is added 2310 */ 2311 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2312 { 2313 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2314 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2315 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2316 const u8 *maddr = _maddr; 2317 struct iwl_trans_txq_scd_cfg cfg = { 2318 .fifo = vif->type == NL80211_IFTYPE_AP ? 2319 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE, 2320 .sta_id = msta->sta_id, 2321 .tid = 0, 2322 .aggregate = false, 2323 .frame_limit = IWL_FRAME_LIMIT, 2324 }; 2325 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2326 int ret; 2327 2328 lockdep_assert_held(&mvm->mutex); 2329 2330 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2331 vif->type != NL80211_IFTYPE_ADHOC)) 2332 return -ENOTSUPP; 2333 2334 /* 2335 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2336 * invalid, so make sure we use the queue we want. 2337 * Note that this is done here as we want to avoid making DQA 2338 * changes in mac80211 layer. 2339 */ 2340 if (vif->type == NL80211_IFTYPE_ADHOC) 2341 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2342 2343 /* 2344 * While in previous FWs we had to exclude cab queue from TFD queue 2345 * mask, now it is needed as any other queue. 2346 */ 2347 if (!iwl_mvm_has_new_tx_api(mvm) && 2348 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2349 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2350 timeout); 2351 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue); 2352 } 2353 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2354 mvmvif->id, mvmvif->color); 2355 if (ret) 2356 goto err; 2357 2358 /* 2359 * Enable cab queue after the ADD_STA command is sent. 2360 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2361 * command with unknown station id, and for FW that doesn't support 2362 * station API since the cab queue is not included in the 2363 * tfd_queue_mask. 2364 */ 2365 if (iwl_mvm_has_new_tx_api(mvm)) { 2366 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id, 2367 0, 2368 timeout); 2369 if (queue < 0) { 2370 ret = queue; 2371 goto err; 2372 } 2373 mvmvif->cab_queue = queue; 2374 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2375 IWL_UCODE_TLV_API_STA_TYPE)) 2376 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg, 2377 timeout); 2378 2379 return 0; 2380 err: 2381 iwl_mvm_dealloc_int_sta(mvm, msta); 2382 return ret; 2383 } 2384 2385 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2386 struct ieee80211_key_conf *keyconf, 2387 bool mcast) 2388 { 2389 union { 2390 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2391 struct iwl_mvm_add_sta_key_cmd cmd; 2392 } u = {}; 2393 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2394 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2395 __le16 key_flags; 2396 int ret, size; 2397 u32 status; 2398 2399 /* This is a valid situation for GTK removal */ 2400 if (sta_id == IWL_MVM_INVALID_STA) 2401 return 0; 2402 2403 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2404 STA_KEY_FLG_KEYID_MSK); 2405 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2406 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2407 2408 if (mcast) 2409 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2410 2411 /* 2412 * The fields assigned here are in the same location at the start 2413 * of the command, so we can do this union trick. 2414 */ 2415 u.cmd.common.key_flags = key_flags; 2416 u.cmd.common.key_offset = keyconf->hw_key_idx; 2417 u.cmd.common.sta_id = sta_id; 2418 2419 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 2420 2421 status = ADD_STA_SUCCESS; 2422 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 2423 &status); 2424 2425 switch (status) { 2426 case ADD_STA_SUCCESS: 2427 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2428 break; 2429 default: 2430 ret = -EIO; 2431 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2432 break; 2433 } 2434 2435 return ret; 2436 } 2437 2438 /* 2439 * Send the FW a request to remove the station from it's internal data 2440 * structures, and in addition remove it from the local data structure. 2441 */ 2442 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2443 { 2444 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2445 int ret; 2446 2447 lockdep_assert_held(&mvm->mutex); 2448 2449 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2450 2451 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0); 2452 2453 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2454 if (ret) 2455 IWL_WARN(mvm, "Failed sending remove station\n"); 2456 2457 return ret; 2458 } 2459 2460 #define IWL_MAX_RX_BA_SESSIONS 16 2461 2462 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2463 { 2464 struct iwl_mvm_rss_sync_notif notif = { 2465 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2466 .metadata.sync = 1, 2467 .delba.baid = baid, 2468 }; 2469 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2470 }; 2471 2472 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2473 struct iwl_mvm_baid_data *data) 2474 { 2475 int i; 2476 2477 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2478 2479 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2480 int j; 2481 struct iwl_mvm_reorder_buffer *reorder_buf = 2482 &data->reorder_buf[i]; 2483 struct iwl_mvm_reorder_buf_entry *entries = 2484 &data->entries[i * data->entries_per_queue]; 2485 2486 spin_lock_bh(&reorder_buf->lock); 2487 if (likely(!reorder_buf->num_stored)) { 2488 spin_unlock_bh(&reorder_buf->lock); 2489 continue; 2490 } 2491 2492 /* 2493 * This shouldn't happen in regular DELBA since the internal 2494 * delBA notification should trigger a release of all frames in 2495 * the reorder buffer. 2496 */ 2497 WARN_ON(1); 2498 2499 for (j = 0; j < reorder_buf->buf_size; j++) 2500 __skb_queue_purge(&entries[j].e.frames); 2501 /* 2502 * Prevent timer re-arm. This prevents a very far fetched case 2503 * where we timed out on the notification. There may be prior 2504 * RX frames pending in the RX queue before the notification 2505 * that might get processed between now and the actual deletion 2506 * and we would re-arm the timer although we are deleting the 2507 * reorder buffer. 2508 */ 2509 reorder_buf->removed = true; 2510 spin_unlock_bh(&reorder_buf->lock); 2511 del_timer_sync(&reorder_buf->reorder_timer); 2512 } 2513 } 2514 2515 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2516 struct iwl_mvm_baid_data *data, 2517 u16 ssn, u16 buf_size) 2518 { 2519 int i; 2520 2521 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2522 struct iwl_mvm_reorder_buffer *reorder_buf = 2523 &data->reorder_buf[i]; 2524 struct iwl_mvm_reorder_buf_entry *entries = 2525 &data->entries[i * data->entries_per_queue]; 2526 int j; 2527 2528 reorder_buf->num_stored = 0; 2529 reorder_buf->head_sn = ssn; 2530 reorder_buf->buf_size = buf_size; 2531 /* rx reorder timer */ 2532 timer_setup(&reorder_buf->reorder_timer, 2533 iwl_mvm_reorder_timer_expired, 0); 2534 spin_lock_init(&reorder_buf->lock); 2535 reorder_buf->mvm = mvm; 2536 reorder_buf->queue = i; 2537 reorder_buf->valid = false; 2538 for (j = 0; j < reorder_buf->buf_size; j++) 2539 __skb_queue_head_init(&entries[j].e.frames); 2540 } 2541 } 2542 2543 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2544 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout) 2545 { 2546 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2547 struct iwl_mvm_add_sta_cmd cmd = {}; 2548 struct iwl_mvm_baid_data *baid_data = NULL; 2549 int ret; 2550 u32 status; 2551 2552 lockdep_assert_held(&mvm->mutex); 2553 2554 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2555 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2556 return -ENOSPC; 2557 } 2558 2559 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2560 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2561 2562 /* sparse doesn't like the __align() so don't check */ 2563 #ifndef __CHECKER__ 2564 /* 2565 * The division below will be OK if either the cache line size 2566 * can be divided by the entry size (ALIGN will round up) or if 2567 * if the entry size can be divided by the cache line size, in 2568 * which case the ALIGN() will do nothing. 2569 */ 2570 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2571 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2572 #endif 2573 2574 /* 2575 * Upward align the reorder buffer size to fill an entire cache 2576 * line for each queue, to avoid sharing cache lines between 2577 * different queues. 2578 */ 2579 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2580 2581 /* 2582 * Allocate here so if allocation fails we can bail out early 2583 * before starting the BA session in the firmware 2584 */ 2585 baid_data = kzalloc(sizeof(*baid_data) + 2586 mvm->trans->num_rx_queues * 2587 reorder_buf_size, 2588 GFP_KERNEL); 2589 if (!baid_data) 2590 return -ENOMEM; 2591 2592 /* 2593 * This division is why we need the above BUILD_BUG_ON(), 2594 * if that doesn't hold then this will not be right. 2595 */ 2596 baid_data->entries_per_queue = 2597 reorder_buf_size / sizeof(baid_data->entries[0]); 2598 } 2599 2600 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2601 cmd.sta_id = mvm_sta->sta_id; 2602 cmd.add_modify = STA_MODE_MODIFY; 2603 if (start) { 2604 cmd.add_immediate_ba_tid = (u8) tid; 2605 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2606 cmd.rx_ba_window = cpu_to_le16(buf_size); 2607 } else { 2608 cmd.remove_immediate_ba_tid = (u8) tid; 2609 } 2610 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2611 STA_MODIFY_REMOVE_BA_TID; 2612 2613 status = ADD_STA_SUCCESS; 2614 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2615 iwl_mvm_add_sta_cmd_size(mvm), 2616 &cmd, &status); 2617 if (ret) 2618 goto out_free; 2619 2620 switch (status & IWL_ADD_STA_STATUS_MASK) { 2621 case ADD_STA_SUCCESS: 2622 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2623 start ? "start" : "stopp"); 2624 break; 2625 case ADD_STA_IMMEDIATE_BA_FAILURE: 2626 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2627 ret = -ENOSPC; 2628 break; 2629 default: 2630 ret = -EIO; 2631 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2632 start ? "start" : "stopp", status); 2633 break; 2634 } 2635 2636 if (ret) 2637 goto out_free; 2638 2639 if (start) { 2640 u8 baid; 2641 2642 mvm->rx_ba_sessions++; 2643 2644 if (!iwl_mvm_has_new_rx_api(mvm)) 2645 return 0; 2646 2647 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2648 ret = -EINVAL; 2649 goto out_free; 2650 } 2651 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2652 IWL_ADD_STA_BAID_SHIFT); 2653 baid_data->baid = baid; 2654 baid_data->timeout = timeout; 2655 baid_data->last_rx = jiffies; 2656 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2657 timer_setup(&baid_data->session_timer, 2658 iwl_mvm_rx_agg_session_expired, 0); 2659 baid_data->mvm = mvm; 2660 baid_data->tid = tid; 2661 baid_data->sta_id = mvm_sta->sta_id; 2662 2663 mvm_sta->tid_to_baid[tid] = baid; 2664 if (timeout) 2665 mod_timer(&baid_data->session_timer, 2666 TU_TO_EXP_TIME(timeout * 2)); 2667 2668 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2669 /* 2670 * protect the BA data with RCU to cover a case where our 2671 * internal RX sync mechanism will timeout (not that it's 2672 * supposed to happen) and we will free the session data while 2673 * RX is being processed in parallel 2674 */ 2675 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2676 mvm_sta->sta_id, tid, baid); 2677 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2678 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2679 } else { 2680 u8 baid = mvm_sta->tid_to_baid[tid]; 2681 2682 if (mvm->rx_ba_sessions > 0) 2683 /* check that restart flow didn't zero the counter */ 2684 mvm->rx_ba_sessions--; 2685 if (!iwl_mvm_has_new_rx_api(mvm)) 2686 return 0; 2687 2688 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2689 return -EINVAL; 2690 2691 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2692 if (WARN_ON(!baid_data)) 2693 return -EINVAL; 2694 2695 /* synchronize all rx queues so we can safely delete */ 2696 iwl_mvm_free_reorder(mvm, baid_data); 2697 del_timer_sync(&baid_data->session_timer); 2698 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2699 kfree_rcu(baid_data, rcu_head); 2700 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2701 } 2702 return 0; 2703 2704 out_free: 2705 kfree(baid_data); 2706 return ret; 2707 } 2708 2709 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2710 int tid, u8 queue, bool start) 2711 { 2712 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2713 struct iwl_mvm_add_sta_cmd cmd = {}; 2714 int ret; 2715 u32 status; 2716 2717 lockdep_assert_held(&mvm->mutex); 2718 2719 if (start) { 2720 mvm_sta->tfd_queue_msk |= BIT(queue); 2721 mvm_sta->tid_disable_agg &= ~BIT(tid); 2722 } else { 2723 /* In DQA-mode the queue isn't removed on agg termination */ 2724 mvm_sta->tid_disable_agg |= BIT(tid); 2725 } 2726 2727 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2728 cmd.sta_id = mvm_sta->sta_id; 2729 cmd.add_modify = STA_MODE_MODIFY; 2730 if (!iwl_mvm_has_new_tx_api(mvm)) 2731 cmd.modify_mask = STA_MODIFY_QUEUES; 2732 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2733 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2734 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2735 2736 status = ADD_STA_SUCCESS; 2737 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2738 iwl_mvm_add_sta_cmd_size(mvm), 2739 &cmd, &status); 2740 if (ret) 2741 return ret; 2742 2743 switch (status & IWL_ADD_STA_STATUS_MASK) { 2744 case ADD_STA_SUCCESS: 2745 break; 2746 default: 2747 ret = -EIO; 2748 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2749 start ? "start" : "stopp", status); 2750 break; 2751 } 2752 2753 return ret; 2754 } 2755 2756 const u8 tid_to_mac80211_ac[] = { 2757 IEEE80211_AC_BE, 2758 IEEE80211_AC_BK, 2759 IEEE80211_AC_BK, 2760 IEEE80211_AC_BE, 2761 IEEE80211_AC_VI, 2762 IEEE80211_AC_VI, 2763 IEEE80211_AC_VO, 2764 IEEE80211_AC_VO, 2765 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2766 }; 2767 2768 static const u8 tid_to_ucode_ac[] = { 2769 AC_BE, 2770 AC_BK, 2771 AC_BK, 2772 AC_BE, 2773 AC_VI, 2774 AC_VI, 2775 AC_VO, 2776 AC_VO, 2777 }; 2778 2779 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2780 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2781 { 2782 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2783 struct iwl_mvm_tid_data *tid_data; 2784 u16 normalized_ssn; 2785 u16 txq_id; 2786 int ret; 2787 2788 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2789 return -EINVAL; 2790 2791 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2792 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2793 IWL_ERR(mvm, 2794 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2795 mvmsta->tid_data[tid].state); 2796 return -ENXIO; 2797 } 2798 2799 lockdep_assert_held(&mvm->mutex); 2800 2801 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE && 2802 iwl_mvm_has_new_tx_api(mvm)) { 2803 u8 ac = tid_to_mac80211_ac[tid]; 2804 2805 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 2806 if (ret) 2807 return ret; 2808 } 2809 2810 spin_lock_bh(&mvmsta->lock); 2811 2812 /* 2813 * Note the possible cases: 2814 * 1. An enabled TXQ - TXQ needs to become agg'ed 2815 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2816 * it as reserved 2817 */ 2818 txq_id = mvmsta->tid_data[tid].txq_id; 2819 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2820 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2821 IWL_MVM_DQA_MIN_DATA_QUEUE, 2822 IWL_MVM_DQA_MAX_DATA_QUEUE); 2823 if (ret < 0) { 2824 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2825 goto out; 2826 } 2827 2828 txq_id = ret; 2829 2830 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2831 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2832 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { 2833 ret = -ENXIO; 2834 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", 2835 tid, IWL_MAX_HW_QUEUES - 1); 2836 goto out; 2837 2838 } else if (unlikely(mvm->queue_info[txq_id].status == 2839 IWL_MVM_QUEUE_SHARED)) { 2840 ret = -ENXIO; 2841 IWL_DEBUG_TX_QUEUES(mvm, 2842 "Can't start tid %d agg on shared queue!\n", 2843 tid); 2844 goto out; 2845 } 2846 2847 IWL_DEBUG_TX_QUEUES(mvm, 2848 "AGG for tid %d will be on queue #%d\n", 2849 tid, txq_id); 2850 2851 tid_data = &mvmsta->tid_data[tid]; 2852 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2853 tid_data->txq_id = txq_id; 2854 *ssn = tid_data->ssn; 2855 2856 IWL_DEBUG_TX_QUEUES(mvm, 2857 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2858 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2859 tid_data->next_reclaimed); 2860 2861 /* 2862 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2863 * to align the wrap around of ssn so we compare relevant values. 2864 */ 2865 normalized_ssn = tid_data->ssn; 2866 if (mvm->trans->trans_cfg->gen2) 2867 normalized_ssn &= 0xff; 2868 2869 if (normalized_ssn == tid_data->next_reclaimed) { 2870 tid_data->state = IWL_AGG_STARTING; 2871 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2872 } else { 2873 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2874 ret = 0; 2875 } 2876 2877 out: 2878 spin_unlock_bh(&mvmsta->lock); 2879 2880 return ret; 2881 } 2882 2883 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2884 struct ieee80211_sta *sta, u16 tid, u16 buf_size, 2885 bool amsdu) 2886 { 2887 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2888 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2889 unsigned int wdg_timeout = 2890 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2891 int queue, ret; 2892 bool alloc_queue = true; 2893 enum iwl_mvm_queue_status queue_status; 2894 u16 ssn; 2895 2896 struct iwl_trans_txq_scd_cfg cfg = { 2897 .sta_id = mvmsta->sta_id, 2898 .tid = tid, 2899 .frame_limit = buf_size, 2900 .aggregate = true, 2901 }; 2902 2903 /* 2904 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2905 * manager, so this function should never be called in this case. 2906 */ 2907 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2908 return -EINVAL; 2909 2910 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2911 != IWL_MAX_TID_COUNT); 2912 2913 spin_lock_bh(&mvmsta->lock); 2914 ssn = tid_data->ssn; 2915 queue = tid_data->txq_id; 2916 tid_data->state = IWL_AGG_ON; 2917 mvmsta->agg_tids |= BIT(tid); 2918 tid_data->ssn = 0xffff; 2919 tid_data->amsdu_in_ampdu_allowed = amsdu; 2920 spin_unlock_bh(&mvmsta->lock); 2921 2922 if (iwl_mvm_has_new_tx_api(mvm)) { 2923 /* 2924 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2925 * would have failed, so if we are here there is no need to 2926 * allocate a queue. 2927 * However, if aggregation size is different than the default 2928 * size, the scheduler should be reconfigured. 2929 * We cannot do this with the new TX API, so return unsupported 2930 * for now, until it will be offloaded to firmware.. 2931 * Note that if SCD default value changes - this condition 2932 * should be updated as well. 2933 */ 2934 if (buf_size < IWL_FRAME_LIMIT) 2935 return -ENOTSUPP; 2936 2937 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2938 if (ret) 2939 return -EIO; 2940 goto out; 2941 } 2942 2943 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2944 2945 queue_status = mvm->queue_info[queue].status; 2946 2947 /* Maybe there is no need to even alloc a queue... */ 2948 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2949 alloc_queue = false; 2950 2951 /* 2952 * Only reconfig the SCD for the queue if the window size has 2953 * changed from current (become smaller) 2954 */ 2955 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2956 /* 2957 * If reconfiguring an existing queue, it first must be 2958 * drained 2959 */ 2960 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2961 BIT(queue)); 2962 if (ret) { 2963 IWL_ERR(mvm, 2964 "Error draining queue before reconfig\n"); 2965 return ret; 2966 } 2967 2968 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2969 mvmsta->sta_id, tid, 2970 buf_size, ssn); 2971 if (ret) { 2972 IWL_ERR(mvm, 2973 "Error reconfiguring TXQ #%d\n", queue); 2974 return ret; 2975 } 2976 } 2977 2978 if (alloc_queue) 2979 iwl_mvm_enable_txq(mvm, sta, queue, ssn, 2980 &cfg, wdg_timeout); 2981 2982 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2983 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2984 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2985 if (ret) 2986 return -EIO; 2987 } 2988 2989 /* No need to mark as reserved */ 2990 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2991 2992 out: 2993 /* 2994 * Even though in theory the peer could have different 2995 * aggregation reorder buffer sizes for different sessions, 2996 * our ucode doesn't allow for that and has a global limit 2997 * for each station. Therefore, use the minimum of all the 2998 * aggregation sessions and our default value. 2999 */ 3000 mvmsta->max_agg_bufsize = 3001 min(mvmsta->max_agg_bufsize, buf_size); 3002 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 3003 3004 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 3005 sta->addr, tid); 3006 3007 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq); 3008 } 3009 3010 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 3011 struct iwl_mvm_sta *mvmsta, 3012 struct iwl_mvm_tid_data *tid_data) 3013 { 3014 u16 txq_id = tid_data->txq_id; 3015 3016 lockdep_assert_held(&mvm->mutex); 3017 3018 if (iwl_mvm_has_new_tx_api(mvm)) 3019 return; 3020 3021 /* 3022 * The TXQ is marked as reserved only if no traffic came through yet 3023 * This means no traffic has been sent on this TID (agg'd or not), so 3024 * we no longer have use for the queue. Since it hasn't even been 3025 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 3026 * free. 3027 */ 3028 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 3029 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 3030 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 3031 } 3032 } 3033 3034 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3035 struct ieee80211_sta *sta, u16 tid) 3036 { 3037 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3038 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3039 u16 txq_id; 3040 int err; 3041 3042 /* 3043 * If mac80211 is cleaning its state, then say that we finished since 3044 * our state has been cleared anyway. 3045 */ 3046 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 3047 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3048 return 0; 3049 } 3050 3051 spin_lock_bh(&mvmsta->lock); 3052 3053 txq_id = tid_data->txq_id; 3054 3055 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 3056 mvmsta->sta_id, tid, txq_id, tid_data->state); 3057 3058 mvmsta->agg_tids &= ~BIT(tid); 3059 3060 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3061 3062 switch (tid_data->state) { 3063 case IWL_AGG_ON: 3064 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3065 3066 IWL_DEBUG_TX_QUEUES(mvm, 3067 "ssn = %d, next_recl = %d\n", 3068 tid_data->ssn, tid_data->next_reclaimed); 3069 3070 tid_data->ssn = 0xffff; 3071 tid_data->state = IWL_AGG_OFF; 3072 spin_unlock_bh(&mvmsta->lock); 3073 3074 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3075 3076 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3077 return 0; 3078 case IWL_AGG_STARTING: 3079 case IWL_EMPTYING_HW_QUEUE_ADDBA: 3080 /* 3081 * The agg session has been stopped before it was set up. This 3082 * can happen when the AddBA timer times out for example. 3083 */ 3084 3085 /* No barriers since we are under mutex */ 3086 lockdep_assert_held(&mvm->mutex); 3087 3088 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 3089 tid_data->state = IWL_AGG_OFF; 3090 err = 0; 3091 break; 3092 default: 3093 IWL_ERR(mvm, 3094 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 3095 mvmsta->sta_id, tid, tid_data->state); 3096 IWL_ERR(mvm, 3097 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 3098 err = -EINVAL; 3099 } 3100 3101 spin_unlock_bh(&mvmsta->lock); 3102 3103 return err; 3104 } 3105 3106 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 3107 struct ieee80211_sta *sta, u16 tid) 3108 { 3109 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3110 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 3111 u16 txq_id; 3112 enum iwl_mvm_agg_state old_state; 3113 3114 /* 3115 * First set the agg state to OFF to avoid calling 3116 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 3117 */ 3118 spin_lock_bh(&mvmsta->lock); 3119 txq_id = tid_data->txq_id; 3120 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 3121 mvmsta->sta_id, tid, txq_id, tid_data->state); 3122 old_state = tid_data->state; 3123 tid_data->state = IWL_AGG_OFF; 3124 mvmsta->agg_tids &= ~BIT(tid); 3125 spin_unlock_bh(&mvmsta->lock); 3126 3127 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 3128 3129 if (old_state >= IWL_AGG_ON) { 3130 iwl_mvm_drain_sta(mvm, mvmsta, true); 3131 3132 if (iwl_mvm_has_new_tx_api(mvm)) { 3133 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 3134 BIT(tid), 0)) 3135 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3136 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 3137 } else { 3138 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 3139 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 3140 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 3141 } 3142 3143 iwl_mvm_drain_sta(mvm, mvmsta, false); 3144 3145 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 3146 } 3147 3148 return 0; 3149 } 3150 3151 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 3152 { 3153 int i, max = -1, max_offs = -1; 3154 3155 lockdep_assert_held(&mvm->mutex); 3156 3157 /* Pick the unused key offset with the highest 'deleted' 3158 * counter. Every time a key is deleted, all the counters 3159 * are incremented and the one that was just deleted is 3160 * reset to zero. Thus, the highest counter is the one 3161 * that was deleted longest ago. Pick that one. 3162 */ 3163 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3164 if (test_bit(i, mvm->fw_key_table)) 3165 continue; 3166 if (mvm->fw_key_deleted[i] > max) { 3167 max = mvm->fw_key_deleted[i]; 3168 max_offs = i; 3169 } 3170 } 3171 3172 if (max_offs < 0) 3173 return STA_KEY_IDX_INVALID; 3174 3175 return max_offs; 3176 } 3177 3178 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3179 struct ieee80211_vif *vif, 3180 struct ieee80211_sta *sta) 3181 { 3182 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3183 3184 if (sta) 3185 return iwl_mvm_sta_from_mac80211(sta); 3186 3187 /* 3188 * The device expects GTKs for station interfaces to be 3189 * installed as GTKs for the AP station. If we have no 3190 * station ID, then use AP's station ID. 3191 */ 3192 if (vif->type == NL80211_IFTYPE_STATION && 3193 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3194 u8 sta_id = mvmvif->ap_sta_id; 3195 3196 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3197 lockdep_is_held(&mvm->mutex)); 3198 3199 /* 3200 * It is possible that the 'sta' parameter is NULL, 3201 * for example when a GTK is removed - the sta_id will then 3202 * be the AP ID, and no station was passed by mac80211. 3203 */ 3204 if (IS_ERR_OR_NULL(sta)) 3205 return NULL; 3206 3207 return iwl_mvm_sta_from_mac80211(sta); 3208 } 3209 3210 return NULL; 3211 } 3212 3213 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3214 u32 sta_id, 3215 struct ieee80211_key_conf *key, bool mcast, 3216 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3217 u8 key_offset, bool mfp) 3218 { 3219 union { 3220 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3221 struct iwl_mvm_add_sta_key_cmd cmd; 3222 } u = {}; 3223 __le16 key_flags; 3224 int ret; 3225 u32 status; 3226 u16 keyidx; 3227 u64 pn = 0; 3228 int i, size; 3229 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3230 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3231 3232 if (sta_id == IWL_MVM_INVALID_STA) 3233 return -EINVAL; 3234 3235 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3236 STA_KEY_FLG_KEYID_MSK; 3237 key_flags = cpu_to_le16(keyidx); 3238 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3239 3240 switch (key->cipher) { 3241 case WLAN_CIPHER_SUITE_TKIP: 3242 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3243 if (new_api) { 3244 memcpy((void *)&u.cmd.tx_mic_key, 3245 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3246 IWL_MIC_KEY_SIZE); 3247 3248 memcpy((void *)&u.cmd.rx_mic_key, 3249 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3250 IWL_MIC_KEY_SIZE); 3251 pn = atomic64_read(&key->tx_pn); 3252 3253 } else { 3254 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3255 for (i = 0; i < 5; i++) 3256 u.cmd_v1.tkip_rx_ttak[i] = 3257 cpu_to_le16(tkip_p1k[i]); 3258 } 3259 memcpy(u.cmd.common.key, key->key, key->keylen); 3260 break; 3261 case WLAN_CIPHER_SUITE_CCMP: 3262 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3263 memcpy(u.cmd.common.key, key->key, key->keylen); 3264 if (new_api) 3265 pn = atomic64_read(&key->tx_pn); 3266 break; 3267 case WLAN_CIPHER_SUITE_WEP104: 3268 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3269 /* fall through */ 3270 case WLAN_CIPHER_SUITE_WEP40: 3271 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3272 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3273 break; 3274 case WLAN_CIPHER_SUITE_GCMP_256: 3275 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3276 /* fall through */ 3277 case WLAN_CIPHER_SUITE_GCMP: 3278 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3279 memcpy(u.cmd.common.key, key->key, key->keylen); 3280 if (new_api) 3281 pn = atomic64_read(&key->tx_pn); 3282 break; 3283 default: 3284 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3285 memcpy(u.cmd.common.key, key->key, key->keylen); 3286 } 3287 3288 if (mcast) 3289 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3290 if (mfp) 3291 key_flags |= cpu_to_le16(STA_KEY_MFP); 3292 3293 u.cmd.common.key_offset = key_offset; 3294 u.cmd.common.key_flags = key_flags; 3295 u.cmd.common.sta_id = sta_id; 3296 3297 if (new_api) { 3298 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3299 size = sizeof(u.cmd); 3300 } else { 3301 size = sizeof(u.cmd_v1); 3302 } 3303 3304 status = ADD_STA_SUCCESS; 3305 if (cmd_flags & CMD_ASYNC) 3306 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3307 &u.cmd); 3308 else 3309 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3310 &u.cmd, &status); 3311 3312 switch (status) { 3313 case ADD_STA_SUCCESS: 3314 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3315 break; 3316 default: 3317 ret = -EIO; 3318 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3319 break; 3320 } 3321 3322 return ret; 3323 } 3324 3325 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3326 struct ieee80211_key_conf *keyconf, 3327 u8 sta_id, bool remove_key) 3328 { 3329 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3330 3331 /* verify the key details match the required command's expectations */ 3332 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3333 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3334 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3335 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3336 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3337 return -EINVAL; 3338 3339 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3340 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3341 return -EINVAL; 3342 3343 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3344 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3345 3346 if (remove_key) { 3347 /* This is a valid situation for IGTK */ 3348 if (sta_id == IWL_MVM_INVALID_STA) 3349 return 0; 3350 3351 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3352 } else { 3353 struct ieee80211_key_seq seq; 3354 const u8 *pn; 3355 3356 switch (keyconf->cipher) { 3357 case WLAN_CIPHER_SUITE_AES_CMAC: 3358 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3359 break; 3360 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3361 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3362 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3363 break; 3364 default: 3365 return -EINVAL; 3366 } 3367 3368 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3369 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3370 igtk_cmd.ctrl_flags |= 3371 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3372 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3373 pn = seq.aes_cmac.pn; 3374 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3375 ((u64) pn[4] << 8) | 3376 ((u64) pn[3] << 16) | 3377 ((u64) pn[2] << 24) | 3378 ((u64) pn[1] << 32) | 3379 ((u64) pn[0] << 40)); 3380 } 3381 3382 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3383 remove_key ? "removing" : "installing", 3384 igtk_cmd.sta_id); 3385 3386 if (!iwl_mvm_has_new_rx_api(mvm)) { 3387 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3388 .ctrl_flags = igtk_cmd.ctrl_flags, 3389 .key_id = igtk_cmd.key_id, 3390 .sta_id = igtk_cmd.sta_id, 3391 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3392 }; 3393 3394 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3395 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3396 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3397 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3398 } 3399 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3400 sizeof(igtk_cmd), &igtk_cmd); 3401 } 3402 3403 3404 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3405 struct ieee80211_vif *vif, 3406 struct ieee80211_sta *sta) 3407 { 3408 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3409 3410 if (sta) 3411 return sta->addr; 3412 3413 if (vif->type == NL80211_IFTYPE_STATION && 3414 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3415 u8 sta_id = mvmvif->ap_sta_id; 3416 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3417 lockdep_is_held(&mvm->mutex)); 3418 return sta->addr; 3419 } 3420 3421 3422 return NULL; 3423 } 3424 3425 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3426 struct ieee80211_vif *vif, 3427 struct ieee80211_sta *sta, 3428 struct ieee80211_key_conf *keyconf, 3429 u8 key_offset, 3430 bool mcast) 3431 { 3432 int ret; 3433 const u8 *addr; 3434 struct ieee80211_key_seq seq; 3435 u16 p1k[5]; 3436 u32 sta_id; 3437 bool mfp = false; 3438 3439 if (sta) { 3440 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3441 3442 sta_id = mvm_sta->sta_id; 3443 mfp = sta->mfp; 3444 } else if (vif->type == NL80211_IFTYPE_AP && 3445 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3446 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3447 3448 sta_id = mvmvif->mcast_sta.sta_id; 3449 } else { 3450 IWL_ERR(mvm, "Failed to find station id\n"); 3451 return -EINVAL; 3452 } 3453 3454 switch (keyconf->cipher) { 3455 case WLAN_CIPHER_SUITE_TKIP: 3456 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3457 /* get phase 1 key from mac80211 */ 3458 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3459 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3460 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3461 seq.tkip.iv32, p1k, 0, key_offset, 3462 mfp); 3463 break; 3464 case WLAN_CIPHER_SUITE_CCMP: 3465 case WLAN_CIPHER_SUITE_WEP40: 3466 case WLAN_CIPHER_SUITE_WEP104: 3467 case WLAN_CIPHER_SUITE_GCMP: 3468 case WLAN_CIPHER_SUITE_GCMP_256: 3469 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3470 0, NULL, 0, key_offset, mfp); 3471 break; 3472 default: 3473 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3474 0, NULL, 0, key_offset, mfp); 3475 } 3476 3477 return ret; 3478 } 3479 3480 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3481 struct ieee80211_vif *vif, 3482 struct ieee80211_sta *sta, 3483 struct ieee80211_key_conf *keyconf, 3484 u8 key_offset) 3485 { 3486 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3487 struct iwl_mvm_sta *mvm_sta; 3488 u8 sta_id = IWL_MVM_INVALID_STA; 3489 int ret; 3490 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3491 3492 lockdep_assert_held(&mvm->mutex); 3493 3494 if (vif->type != NL80211_IFTYPE_AP || 3495 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3496 /* Get the station id from the mvm local station table */ 3497 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3498 if (!mvm_sta) { 3499 IWL_ERR(mvm, "Failed to find station\n"); 3500 return -EINVAL; 3501 } 3502 sta_id = mvm_sta->sta_id; 3503 3504 /* 3505 * It is possible that the 'sta' parameter is NULL, and thus 3506 * there is a need to retrieve the sta from the local station 3507 * table. 3508 */ 3509 if (!sta) { 3510 sta = rcu_dereference_protected( 3511 mvm->fw_id_to_mac_id[sta_id], 3512 lockdep_is_held(&mvm->mutex)); 3513 if (IS_ERR_OR_NULL(sta)) { 3514 IWL_ERR(mvm, "Invalid station id\n"); 3515 return -EINVAL; 3516 } 3517 } 3518 3519 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3520 return -EINVAL; 3521 } else { 3522 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3523 3524 sta_id = mvmvif->mcast_sta.sta_id; 3525 } 3526 3527 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3528 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3529 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3530 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3531 goto end; 3532 } 3533 3534 /* If the key_offset is not pre-assigned, we need to find a 3535 * new offset to use. In normal cases, the offset is not 3536 * pre-assigned, but during HW_RESTART we want to reuse the 3537 * same indices, so we pass them when this function is called. 3538 * 3539 * In D3 entry, we need to hardcoded the indices (because the 3540 * firmware hardcodes the PTK offset to 0). In this case, we 3541 * need to make sure we don't overwrite the hw_key_idx in the 3542 * keyconf structure, because otherwise we cannot configure 3543 * the original ones back when resuming. 3544 */ 3545 if (key_offset == STA_KEY_IDX_INVALID) { 3546 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3547 if (key_offset == STA_KEY_IDX_INVALID) 3548 return -ENOSPC; 3549 keyconf->hw_key_idx = key_offset; 3550 } 3551 3552 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3553 if (ret) 3554 goto end; 3555 3556 /* 3557 * For WEP, the same key is used for multicast and unicast. Upload it 3558 * again, using the same key offset, and now pointing the other one 3559 * to the same key slot (offset). 3560 * If this fails, remove the original as well. 3561 */ 3562 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3563 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3564 sta) { 3565 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3566 key_offset, !mcast); 3567 if (ret) { 3568 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3569 goto end; 3570 } 3571 } 3572 3573 __set_bit(key_offset, mvm->fw_key_table); 3574 3575 end: 3576 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3577 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3578 sta ? sta->addr : zero_addr, ret); 3579 return ret; 3580 } 3581 3582 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3583 struct ieee80211_vif *vif, 3584 struct ieee80211_sta *sta, 3585 struct ieee80211_key_conf *keyconf) 3586 { 3587 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3588 struct iwl_mvm_sta *mvm_sta; 3589 u8 sta_id = IWL_MVM_INVALID_STA; 3590 int ret, i; 3591 3592 lockdep_assert_held(&mvm->mutex); 3593 3594 /* Get the station from the mvm local station table */ 3595 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3596 if (mvm_sta) 3597 sta_id = mvm_sta->sta_id; 3598 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3599 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3600 3601 3602 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3603 keyconf->keyidx, sta_id); 3604 3605 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3606 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3607 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3608 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3609 3610 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3611 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3612 keyconf->hw_key_idx); 3613 return -ENOENT; 3614 } 3615 3616 /* track which key was deleted last */ 3617 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3618 if (mvm->fw_key_deleted[i] < U8_MAX) 3619 mvm->fw_key_deleted[i]++; 3620 } 3621 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3622 3623 if (sta && !mvm_sta) { 3624 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3625 return 0; 3626 } 3627 3628 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3629 if (ret) 3630 return ret; 3631 3632 /* delete WEP key twice to get rid of (now useless) offset */ 3633 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3634 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3635 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3636 3637 return ret; 3638 } 3639 3640 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3641 struct ieee80211_vif *vif, 3642 struct ieee80211_key_conf *keyconf, 3643 struct ieee80211_sta *sta, u32 iv32, 3644 u16 *phase1key) 3645 { 3646 struct iwl_mvm_sta *mvm_sta; 3647 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3648 bool mfp = sta ? sta->mfp : false; 3649 3650 rcu_read_lock(); 3651 3652 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3653 if (WARN_ON_ONCE(!mvm_sta)) 3654 goto unlock; 3655 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3656 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx, 3657 mfp); 3658 3659 unlock: 3660 rcu_read_unlock(); 3661 } 3662 3663 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3664 struct ieee80211_sta *sta) 3665 { 3666 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3667 struct iwl_mvm_add_sta_cmd cmd = { 3668 .add_modify = STA_MODE_MODIFY, 3669 .sta_id = mvmsta->sta_id, 3670 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3671 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3672 }; 3673 int ret; 3674 3675 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3676 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3677 if (ret) 3678 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3679 } 3680 3681 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3682 struct ieee80211_sta *sta, 3683 enum ieee80211_frame_release_type reason, 3684 u16 cnt, u16 tids, bool more_data, 3685 bool single_sta_queue) 3686 { 3687 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3688 struct iwl_mvm_add_sta_cmd cmd = { 3689 .add_modify = STA_MODE_MODIFY, 3690 .sta_id = mvmsta->sta_id, 3691 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3692 .sleep_tx_count = cpu_to_le16(cnt), 3693 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3694 }; 3695 int tid, ret; 3696 unsigned long _tids = tids; 3697 3698 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3699 * Note that this field is reserved and unused by firmware not 3700 * supporting GO uAPSD, so it's safe to always do this. 3701 */ 3702 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3703 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3704 3705 /* If we're releasing frames from aggregation or dqa queues then check 3706 * if all the queues that we're releasing frames from, combined, have: 3707 * - more frames than the service period, in which case more_data 3708 * needs to be set 3709 * - fewer than 'cnt' frames, in which case we need to adjust the 3710 * firmware command (but do that unconditionally) 3711 */ 3712 if (single_sta_queue) { 3713 int remaining = cnt; 3714 int sleep_tx_count; 3715 3716 spin_lock_bh(&mvmsta->lock); 3717 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3718 struct iwl_mvm_tid_data *tid_data; 3719 u16 n_queued; 3720 3721 tid_data = &mvmsta->tid_data[tid]; 3722 3723 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3724 if (n_queued > remaining) { 3725 more_data = true; 3726 remaining = 0; 3727 break; 3728 } 3729 remaining -= n_queued; 3730 } 3731 sleep_tx_count = cnt - remaining; 3732 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3733 mvmsta->sleep_tx_count = sleep_tx_count; 3734 spin_unlock_bh(&mvmsta->lock); 3735 3736 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3737 if (WARN_ON(cnt - remaining == 0)) { 3738 ieee80211_sta_eosp(sta); 3739 return; 3740 } 3741 } 3742 3743 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3744 if (more_data) 3745 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3746 3747 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3748 mvmsta->next_status_eosp = true; 3749 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3750 } else { 3751 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3752 } 3753 3754 /* block the Tx queues until the FW updated the sleep Tx count */ 3755 iwl_trans_block_txq_ptrs(mvm->trans, true); 3756 3757 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3758 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3759 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3760 if (ret) 3761 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3762 } 3763 3764 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3765 struct iwl_rx_cmd_buffer *rxb) 3766 { 3767 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3768 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3769 struct ieee80211_sta *sta; 3770 u32 sta_id = le32_to_cpu(notif->sta_id); 3771 3772 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3773 return; 3774 3775 rcu_read_lock(); 3776 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3777 if (!IS_ERR_OR_NULL(sta)) 3778 ieee80211_sta_eosp(sta); 3779 rcu_read_unlock(); 3780 } 3781 3782 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3783 struct iwl_mvm_sta *mvmsta, bool disable) 3784 { 3785 struct iwl_mvm_add_sta_cmd cmd = { 3786 .add_modify = STA_MODE_MODIFY, 3787 .sta_id = mvmsta->sta_id, 3788 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3789 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3790 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3791 }; 3792 int ret; 3793 3794 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3795 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3796 if (ret) 3797 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3798 } 3799 3800 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3801 struct ieee80211_sta *sta, 3802 bool disable) 3803 { 3804 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3805 3806 spin_lock_bh(&mvm_sta->lock); 3807 3808 if (mvm_sta->disable_tx == disable) { 3809 spin_unlock_bh(&mvm_sta->lock); 3810 return; 3811 } 3812 3813 mvm_sta->disable_tx = disable; 3814 3815 /* Tell mac80211 to start/stop queuing tx for this station */ 3816 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3817 3818 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3819 3820 spin_unlock_bh(&mvm_sta->lock); 3821 } 3822 3823 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3824 struct iwl_mvm_vif *mvmvif, 3825 struct iwl_mvm_int_sta *sta, 3826 bool disable) 3827 { 3828 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3829 struct iwl_mvm_add_sta_cmd cmd = { 3830 .add_modify = STA_MODE_MODIFY, 3831 .sta_id = sta->sta_id, 3832 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3833 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3834 .mac_id_n_color = cpu_to_le32(id), 3835 }; 3836 int ret; 3837 3838 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3839 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3840 if (ret) 3841 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3842 } 3843 3844 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3845 struct iwl_mvm_vif *mvmvif, 3846 bool disable) 3847 { 3848 struct ieee80211_sta *sta; 3849 struct iwl_mvm_sta *mvm_sta; 3850 int i; 3851 3852 lockdep_assert_held(&mvm->mutex); 3853 3854 /* Block/unblock all the stations of the given mvmvif */ 3855 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3856 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3857 lockdep_is_held(&mvm->mutex)); 3858 if (IS_ERR_OR_NULL(sta)) 3859 continue; 3860 3861 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3862 if (mvm_sta->mac_id_n_color != 3863 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3864 continue; 3865 3866 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3867 } 3868 3869 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3870 return; 3871 3872 /* Need to block/unblock also multicast station */ 3873 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3874 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3875 &mvmvif->mcast_sta, disable); 3876 3877 /* 3878 * Only unblock the broadcast station (FW blocks it for immediate 3879 * quiet, not the driver) 3880 */ 3881 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3882 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3883 &mvmvif->bcast_sta, disable); 3884 } 3885 3886 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3887 { 3888 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3889 struct iwl_mvm_sta *mvmsta; 3890 3891 rcu_read_lock(); 3892 3893 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3894 3895 if (!WARN_ON(!mvmsta)) 3896 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3897 3898 rcu_read_unlock(); 3899 } 3900 3901 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3902 { 3903 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3904 3905 /* 3906 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3907 * to align the wrap around of ssn so we compare relevant values. 3908 */ 3909 if (mvm->trans->trans_cfg->gen2) 3910 sn &= 0xff; 3911 3912 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3913 } 3914