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