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 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <net/mac80211.h> 68 69 #include "mvm.h" 70 #include "sta.h" 71 #include "rs.h" 72 73 /* 74 * New version of ADD_STA_sta command added new fields at the end of the 75 * structure, so sending the size of the relevant API's structure is enough to 76 * support both API versions. 77 */ 78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) 79 { 80 return iwl_mvm_has_new_rx_api(mvm) ? 81 sizeof(struct iwl_mvm_add_sta_cmd) : 82 sizeof(struct iwl_mvm_add_sta_cmd_v7); 83 } 84 85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 86 enum nl80211_iftype iftype) 87 { 88 int sta_id; 89 u32 reserved_ids = 0; 90 91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 93 94 lockdep_assert_held(&mvm->mutex); 95 96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 97 if (iftype != NL80211_IFTYPE_STATION) 98 reserved_ids = BIT(0); 99 100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { 102 if (BIT(sta_id) & reserved_ids) 103 continue; 104 105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 106 lockdep_is_held(&mvm->mutex))) 107 return sta_id; 108 } 109 return IWL_MVM_STATION_COUNT; 110 } 111 112 /* send station add/update command to firmware */ 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 114 bool update, unsigned int flags) 115 { 116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 117 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 118 .sta_id = mvm_sta->sta_id, 119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 120 .add_modify = update ? 1 : 0, 121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 122 STA_FLG_MIMO_EN_MSK), 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 (!update || (flags & STA_MODIFY_QUEUES)) { 130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 133 if (flags & STA_MODIFY_QUEUES) 134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 135 } 136 137 switch (sta->bandwidth) { 138 case IEEE80211_STA_RX_BW_160: 139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 140 /* fall through */ 141 case IEEE80211_STA_RX_BW_80: 142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 143 /* fall through */ 144 case IEEE80211_STA_RX_BW_40: 145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 146 /* fall through */ 147 case IEEE80211_STA_RX_BW_20: 148 if (sta->ht_cap.ht_supported) 149 add_sta_cmd.station_flags |= 150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 151 break; 152 } 153 154 switch (sta->rx_nss) { 155 case 1: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 157 break; 158 case 2: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 160 break; 161 case 3 ... 8: 162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 163 break; 164 } 165 166 switch (sta->smps_mode) { 167 case IEEE80211_SMPS_AUTOMATIC: 168 case IEEE80211_SMPS_NUM_MODES: 169 WARN_ON(1); 170 break; 171 case IEEE80211_SMPS_STATIC: 172 /* override NSS */ 173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 175 break; 176 case IEEE80211_SMPS_DYNAMIC: 177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 178 break; 179 case IEEE80211_SMPS_OFF: 180 /* nothing */ 181 break; 182 } 183 184 if (sta->ht_cap.ht_supported) { 185 add_sta_cmd.station_flags_msk |= 186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 187 STA_FLG_AGG_MPDU_DENS_MSK); 188 189 mpdu_dens = sta->ht_cap.ampdu_density; 190 } 191 192 if (sta->vht_cap.vht_supported) { 193 agg_size = sta->vht_cap.cap & 194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 195 agg_size >>= 196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 197 } else if (sta->ht_cap.ht_supported) { 198 agg_size = sta->ht_cap.ampdu_factor; 199 } 200 201 add_sta_cmd.station_flags |= 202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 203 add_sta_cmd.station_flags |= 204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 205 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 206 207 if (sta->wme) { 208 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 209 210 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 211 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK); 212 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 213 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE); 214 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 215 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI); 216 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 217 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO); 218 } 219 220 status = ADD_STA_SUCCESS; 221 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 222 iwl_mvm_add_sta_cmd_size(mvm), 223 &add_sta_cmd, &status); 224 if (ret) 225 return ret; 226 227 switch (status & IWL_ADD_STA_STATUS_MASK) { 228 case ADD_STA_SUCCESS: 229 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 230 break; 231 default: 232 ret = -EIO; 233 IWL_ERR(mvm, "ADD_STA failed\n"); 234 break; 235 } 236 237 return ret; 238 } 239 240 static void iwl_mvm_rx_agg_session_expired(unsigned long data) 241 { 242 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data; 243 struct iwl_mvm_baid_data *ba_data; 244 struct ieee80211_sta *sta; 245 struct iwl_mvm_sta *mvm_sta; 246 unsigned long timeout; 247 248 rcu_read_lock(); 249 250 ba_data = rcu_dereference(*rcu_ptr); 251 252 if (WARN_ON(!ba_data)) 253 goto unlock; 254 255 if (!ba_data->timeout) 256 goto unlock; 257 258 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 259 if (time_is_after_jiffies(timeout)) { 260 mod_timer(&ba_data->session_timer, timeout); 261 goto unlock; 262 } 263 264 /* Timer expired */ 265 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 266 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 267 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif, 268 sta->addr, ba_data->tid); 269 unlock: 270 rcu_read_unlock(); 271 } 272 273 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, 274 struct ieee80211_sta *sta) 275 { 276 unsigned long used_hw_queues; 277 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 278 unsigned int wdg_timeout = 279 iwl_mvm_get_wd_timeout(mvm, NULL, true, false); 280 u32 ac; 281 282 lockdep_assert_held(&mvm->mutex); 283 284 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); 285 286 /* Find available queues, and allocate them to the ACs */ 287 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 288 u8 queue = find_first_zero_bit(&used_hw_queues, 289 mvm->first_agg_queue); 290 291 if (queue >= mvm->first_agg_queue) { 292 IWL_ERR(mvm, "Failed to allocate STA queue\n"); 293 return -EBUSY; 294 } 295 296 __set_bit(queue, &used_hw_queues); 297 mvmsta->hw_queue[ac] = queue; 298 } 299 300 /* Found a place for all queues - enable them */ 301 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 302 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], 303 mvmsta->hw_queue[ac], 304 iwl_mvm_ac_to_tx_fifo[ac], 0, 305 wdg_timeout); 306 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); 307 } 308 309 return 0; 310 } 311 312 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, 313 struct ieee80211_sta *sta) 314 { 315 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 316 unsigned long sta_msk; 317 int i; 318 319 lockdep_assert_held(&mvm->mutex); 320 321 /* disable the TDLS STA-specific queues */ 322 sta_msk = mvmsta->tfd_queue_msk; 323 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) 324 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); 325 } 326 327 /* Disable aggregations for a bitmap of TIDs for a given station */ 328 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 329 unsigned long disable_agg_tids, 330 bool remove_queue) 331 { 332 struct iwl_mvm_add_sta_cmd cmd = {}; 333 struct ieee80211_sta *sta; 334 struct iwl_mvm_sta *mvmsta; 335 u32 status; 336 u8 sta_id; 337 int ret; 338 339 spin_lock_bh(&mvm->queue_info_lock); 340 sta_id = mvm->queue_info[queue].ra_sta_id; 341 spin_unlock_bh(&mvm->queue_info_lock); 342 343 rcu_read_lock(); 344 345 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 346 347 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 348 rcu_read_unlock(); 349 return -EINVAL; 350 } 351 352 mvmsta = iwl_mvm_sta_from_mac80211(sta); 353 354 mvmsta->tid_disable_agg |= disable_agg_tids; 355 356 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 357 cmd.sta_id = mvmsta->sta_id; 358 cmd.add_modify = STA_MODE_MODIFY; 359 cmd.modify_mask = STA_MODIFY_QUEUES; 360 if (disable_agg_tids) 361 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 362 if (remove_queue) 363 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 364 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 365 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 366 367 rcu_read_unlock(); 368 369 /* Notify FW of queue removal from the STA queues */ 370 status = ADD_STA_SUCCESS; 371 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 372 iwl_mvm_add_sta_cmd_size(mvm), 373 &cmd, &status); 374 375 return ret; 376 } 377 378 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 379 { 380 struct ieee80211_sta *sta; 381 struct iwl_mvm_sta *mvmsta; 382 unsigned long tid_bitmap; 383 unsigned long agg_tids = 0; 384 s8 sta_id; 385 int tid; 386 387 lockdep_assert_held(&mvm->mutex); 388 389 spin_lock_bh(&mvm->queue_info_lock); 390 sta_id = mvm->queue_info[queue].ra_sta_id; 391 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 392 spin_unlock_bh(&mvm->queue_info_lock); 393 394 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 395 lockdep_is_held(&mvm->mutex)); 396 397 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 398 return -EINVAL; 399 400 mvmsta = iwl_mvm_sta_from_mac80211(sta); 401 402 spin_lock_bh(&mvmsta->lock); 403 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 404 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 405 agg_tids |= BIT(tid); 406 } 407 spin_unlock_bh(&mvmsta->lock); 408 409 return agg_tids; 410 } 411 412 /* 413 * Remove a queue from a station's resources. 414 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 415 * doesn't disable the queue 416 */ 417 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 418 { 419 struct ieee80211_sta *sta; 420 struct iwl_mvm_sta *mvmsta; 421 unsigned long tid_bitmap; 422 unsigned long disable_agg_tids = 0; 423 u8 sta_id; 424 int tid; 425 426 lockdep_assert_held(&mvm->mutex); 427 428 spin_lock_bh(&mvm->queue_info_lock); 429 sta_id = mvm->queue_info[queue].ra_sta_id; 430 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 431 spin_unlock_bh(&mvm->queue_info_lock); 432 433 rcu_read_lock(); 434 435 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 436 437 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 438 rcu_read_unlock(); 439 return 0; 440 } 441 442 mvmsta = iwl_mvm_sta_from_mac80211(sta); 443 444 spin_lock_bh(&mvmsta->lock); 445 /* Unmap MAC queues and TIDs from this queue */ 446 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 447 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 448 disable_agg_tids |= BIT(tid); 449 mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE; 450 } 451 452 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 453 spin_unlock_bh(&mvmsta->lock); 454 455 rcu_read_unlock(); 456 457 spin_lock_bh(&mvm->queue_info_lock); 458 /* Unmap MAC queues and TIDs from this queue */ 459 mvm->queue_info[queue].hw_queue_to_mac80211 = 0; 460 mvm->queue_info[queue].hw_queue_refcount = 0; 461 mvm->queue_info[queue].tid_bitmap = 0; 462 spin_unlock_bh(&mvm->queue_info_lock); 463 464 return disable_agg_tids; 465 } 466 467 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 468 unsigned long tfd_queue_mask, u8 ac) 469 { 470 int queue = 0; 471 u8 ac_to_queue[IEEE80211_NUM_ACS]; 472 int i; 473 474 lockdep_assert_held(&mvm->queue_info_lock); 475 476 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 477 478 /* See what ACs the existing queues for this STA have */ 479 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 480 /* Only DATA queues can be shared */ 481 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 482 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 483 continue; 484 485 /* Don't try and take queues being reconfigured */ 486 if (mvm->queue_info[queue].status == 487 IWL_MVM_QUEUE_RECONFIGURING) 488 continue; 489 490 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 491 } 492 493 /* 494 * The queue to share is chosen only from DATA queues as follows (in 495 * descending priority): 496 * 1. An AC_BE queue 497 * 2. Same AC queue 498 * 3. Highest AC queue that is lower than new AC 499 * 4. Any existing AC (there always is at least 1 DATA queue) 500 */ 501 502 /* Priority 1: An AC_BE queue */ 503 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 504 queue = ac_to_queue[IEEE80211_AC_BE]; 505 /* Priority 2: Same AC queue */ 506 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 507 queue = ac_to_queue[ac]; 508 /* Priority 3a: If new AC is VO and VI exists - use VI */ 509 else if (ac == IEEE80211_AC_VO && 510 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 511 queue = ac_to_queue[IEEE80211_AC_VI]; 512 /* Priority 3b: No BE so only AC less than the new one is BK */ 513 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 514 queue = ac_to_queue[IEEE80211_AC_BK]; 515 /* Priority 4a: No BE nor BK - use VI if exists */ 516 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 517 queue = ac_to_queue[IEEE80211_AC_VI]; 518 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 519 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 520 queue = ac_to_queue[IEEE80211_AC_VO]; 521 522 /* Make sure queue found (or not) is legal */ 523 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 524 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 525 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 526 IWL_ERR(mvm, "No DATA queues available to share\n"); 527 return -ENOSPC; 528 } 529 530 /* Make sure the queue isn't in the middle of being reconfigured */ 531 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 532 IWL_ERR(mvm, 533 "TXQ %d is in the middle of re-config - try again\n", 534 queue); 535 return -EBUSY; 536 } 537 538 return queue; 539 } 540 541 /* 542 * If a given queue has a higher AC than the TID stream that is being compared 543 * to, the queue needs to be redirected to the lower AC. This function does that 544 * in such a case, otherwise - if no redirection required - it does nothing, 545 * unless the %force param is true. 546 */ 547 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 548 int ac, int ssn, unsigned int wdg_timeout, 549 bool force) 550 { 551 struct iwl_scd_txq_cfg_cmd cmd = { 552 .scd_queue = queue, 553 .action = SCD_CFG_DISABLE_QUEUE, 554 }; 555 bool shared_queue; 556 unsigned long mq; 557 int ret; 558 559 /* 560 * If the AC is lower than current one - FIFO needs to be redirected to 561 * the lowest one of the streams in the queue. Check if this is needed 562 * here. 563 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 564 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 565 * we need to check if the numerical value of X is LARGER than of Y. 566 */ 567 spin_lock_bh(&mvm->queue_info_lock); 568 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 569 spin_unlock_bh(&mvm->queue_info_lock); 570 571 IWL_DEBUG_TX_QUEUES(mvm, 572 "No redirection needed on TXQ #%d\n", 573 queue); 574 return 0; 575 } 576 577 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 578 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 579 cmd.tid = mvm->queue_info[queue].txq_tid; 580 mq = mvm->queue_info[queue].hw_queue_to_mac80211; 581 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 582 spin_unlock_bh(&mvm->queue_info_lock); 583 584 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 585 queue, iwl_mvm_ac_to_tx_fifo[ac]); 586 587 /* Stop MAC queues and wait for this queue to empty */ 588 iwl_mvm_stop_mac_queues(mvm, mq); 589 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue)); 590 if (ret) { 591 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 592 queue); 593 ret = -EIO; 594 goto out; 595 } 596 597 /* Before redirecting the queue we need to de-activate it */ 598 iwl_trans_txq_disable(mvm->trans, queue, false); 599 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 600 if (ret) 601 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 602 ret); 603 604 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 605 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 606 607 /* Update the TID "owner" of the queue */ 608 spin_lock_bh(&mvm->queue_info_lock); 609 mvm->queue_info[queue].txq_tid = tid; 610 spin_unlock_bh(&mvm->queue_info_lock); 611 612 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 613 614 /* Redirect to lower AC */ 615 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 616 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, 617 ssn); 618 619 /* Update AC marking of the queue */ 620 spin_lock_bh(&mvm->queue_info_lock); 621 mvm->queue_info[queue].mac80211_ac = ac; 622 spin_unlock_bh(&mvm->queue_info_lock); 623 624 /* 625 * Mark queue as shared in transport if shared 626 * Note this has to be done after queue enablement because enablement 627 * can also set this value, and there is no indication there to shared 628 * queues 629 */ 630 if (shared_queue) 631 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 632 633 out: 634 /* Continue using the MAC queues */ 635 iwl_mvm_start_mac_queues(mvm, mq); 636 637 return ret; 638 } 639 640 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 641 struct ieee80211_sta *sta, u8 ac, int tid, 642 struct ieee80211_hdr *hdr) 643 { 644 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 645 struct iwl_trans_txq_scd_cfg cfg = { 646 .fifo = iwl_mvm_ac_to_tx_fifo[ac], 647 .sta_id = mvmsta->sta_id, 648 .tid = tid, 649 .frame_limit = IWL_FRAME_LIMIT, 650 }; 651 unsigned int wdg_timeout = 652 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 653 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 654 int queue = -1; 655 bool using_inactive_queue = false; 656 unsigned long disable_agg_tids = 0; 657 enum iwl_mvm_agg_state queue_state; 658 bool shared_queue = false; 659 int ssn; 660 unsigned long tfd_queue_mask; 661 int ret; 662 663 lockdep_assert_held(&mvm->mutex); 664 665 spin_lock_bh(&mvmsta->lock); 666 tfd_queue_mask = mvmsta->tfd_queue_msk; 667 spin_unlock_bh(&mvmsta->lock); 668 669 spin_lock_bh(&mvm->queue_info_lock); 670 671 /* 672 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 673 * exists 674 */ 675 if (!ieee80211_is_data_qos(hdr->frame_control) || 676 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 677 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 678 IWL_MVM_DQA_MIN_MGMT_QUEUE, 679 IWL_MVM_DQA_MAX_MGMT_QUEUE); 680 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 681 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 682 queue); 683 684 /* If no such queue is found, we'll use a DATA queue instead */ 685 } 686 687 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 688 (mvm->queue_info[mvmsta->reserved_queue].status == 689 IWL_MVM_QUEUE_RESERVED || 690 mvm->queue_info[mvmsta->reserved_queue].status == 691 IWL_MVM_QUEUE_INACTIVE)) { 692 queue = mvmsta->reserved_queue; 693 mvm->queue_info[queue].reserved = true; 694 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 695 } 696 697 if (queue < 0) 698 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 699 IWL_MVM_DQA_MIN_DATA_QUEUE, 700 IWL_MVM_DQA_MAX_DATA_QUEUE); 701 702 /* 703 * Check if this queue is already allocated but inactive. 704 * In such a case, we'll need to first free this queue before enabling 705 * it again, so we'll mark it as reserved to make sure no new traffic 706 * arrives on it 707 */ 708 if (queue > 0 && 709 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 710 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 711 using_inactive_queue = true; 712 IWL_DEBUG_TX_QUEUES(mvm, 713 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 714 queue, mvmsta->sta_id, tid); 715 } 716 717 /* No free queue - we'll have to share */ 718 if (queue <= 0) { 719 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 720 if (queue > 0) { 721 shared_queue = true; 722 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 723 } 724 } 725 726 /* 727 * Mark TXQ as ready, even though it hasn't been fully configured yet, 728 * to make sure no one else takes it. 729 * This will allow avoiding re-acquiring the lock at the end of the 730 * configuration. On error we'll mark it back as free. 731 */ 732 if ((queue > 0) && !shared_queue) 733 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 734 735 spin_unlock_bh(&mvm->queue_info_lock); 736 737 /* This shouldn't happen - out of queues */ 738 if (WARN_ON(queue <= 0)) { 739 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 740 tid, cfg.sta_id); 741 return queue; 742 } 743 744 /* 745 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 746 * but for configuring the SCD to send A-MPDUs we need to mark the queue 747 * as aggregatable. 748 * Mark all DATA queues as allowing to be aggregated at some point 749 */ 750 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 751 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 752 753 /* 754 * If this queue was previously inactive (idle) - we need to free it 755 * first 756 */ 757 if (using_inactive_queue) { 758 struct iwl_scd_txq_cfg_cmd cmd = { 759 .scd_queue = queue, 760 .action = SCD_CFG_DISABLE_QUEUE, 761 }; 762 u8 txq_curr_ac; 763 764 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 765 766 spin_lock_bh(&mvm->queue_info_lock); 767 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 768 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 769 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[txq_curr_ac]; 770 cmd.tid = mvm->queue_info[queue].txq_tid; 771 spin_unlock_bh(&mvm->queue_info_lock); 772 773 /* Disable the queue */ 774 if (disable_agg_tids) 775 iwl_mvm_invalidate_sta_queue(mvm, queue, 776 disable_agg_tids, false); 777 iwl_trans_txq_disable(mvm->trans, queue, false); 778 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), 779 &cmd); 780 if (ret) { 781 IWL_ERR(mvm, 782 "Failed to free inactive queue %d (ret=%d)\n", 783 queue, ret); 784 785 /* Re-mark the inactive queue as inactive */ 786 spin_lock_bh(&mvm->queue_info_lock); 787 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 788 spin_unlock_bh(&mvm->queue_info_lock); 789 790 return ret; 791 } 792 793 /* If TXQ is allocated to another STA, update removal in FW */ 794 if (cmd.sta_id != mvmsta->sta_id) 795 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 796 } 797 798 IWL_DEBUG_TX_QUEUES(mvm, 799 "Allocating %squeue #%d to sta %d on tid %d\n", 800 shared_queue ? "shared " : "", queue, 801 mvmsta->sta_id, tid); 802 803 if (shared_queue) { 804 /* Disable any open aggs on this queue */ 805 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 806 807 if (disable_agg_tids) { 808 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 809 queue); 810 iwl_mvm_invalidate_sta_queue(mvm, queue, 811 disable_agg_tids, false); 812 } 813 } 814 815 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 816 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg, 817 wdg_timeout); 818 819 /* 820 * Mark queue as shared in transport if shared 821 * Note this has to be done after queue enablement because enablement 822 * can also set this value, and there is no indication there to shared 823 * queues 824 */ 825 if (shared_queue) 826 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 827 828 spin_lock_bh(&mvmsta->lock); 829 mvmsta->tid_data[tid].txq_id = queue; 830 mvmsta->tid_data[tid].is_tid_active = true; 831 mvmsta->tfd_queue_msk |= BIT(queue); 832 queue_state = mvmsta->tid_data[tid].state; 833 834 if (mvmsta->reserved_queue == queue) 835 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 836 spin_unlock_bh(&mvmsta->lock); 837 838 if (!shared_queue) { 839 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 840 if (ret) 841 goto out_err; 842 843 /* If we need to re-enable aggregations... */ 844 if (queue_state == IWL_AGG_ON) { 845 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 846 if (ret) 847 goto out_err; 848 } 849 } else { 850 /* Redirect queue, if needed */ 851 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 852 wdg_timeout, false); 853 if (ret) 854 goto out_err; 855 } 856 857 return 0; 858 859 out_err: 860 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 861 862 return ret; 863 } 864 865 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 866 { 867 struct iwl_scd_txq_cfg_cmd cmd = { 868 .scd_queue = queue, 869 .action = SCD_CFG_UPDATE_QUEUE_TID, 870 }; 871 s8 sta_id; 872 int tid; 873 unsigned long tid_bitmap; 874 int ret; 875 876 lockdep_assert_held(&mvm->mutex); 877 878 spin_lock_bh(&mvm->queue_info_lock); 879 sta_id = mvm->queue_info[queue].ra_sta_id; 880 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 881 spin_unlock_bh(&mvm->queue_info_lock); 882 883 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 884 return; 885 886 /* Find any TID for queue */ 887 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 888 cmd.tid = tid; 889 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 890 891 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 892 if (ret) { 893 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 894 queue, ret); 895 return; 896 } 897 898 spin_lock_bh(&mvm->queue_info_lock); 899 mvm->queue_info[queue].txq_tid = tid; 900 spin_unlock_bh(&mvm->queue_info_lock); 901 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 902 queue, tid); 903 } 904 905 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 906 { 907 struct ieee80211_sta *sta; 908 struct iwl_mvm_sta *mvmsta; 909 s8 sta_id; 910 int tid = -1; 911 unsigned long tid_bitmap; 912 unsigned int wdg_timeout; 913 int ssn; 914 int ret = true; 915 916 lockdep_assert_held(&mvm->mutex); 917 918 spin_lock_bh(&mvm->queue_info_lock); 919 sta_id = mvm->queue_info[queue].ra_sta_id; 920 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 921 spin_unlock_bh(&mvm->queue_info_lock); 922 923 /* Find TID for queue, and make sure it is the only one on the queue */ 924 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 925 if (tid_bitmap != BIT(tid)) { 926 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 927 queue, tid_bitmap); 928 return; 929 } 930 931 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 932 tid); 933 934 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 935 lockdep_is_held(&mvm->mutex)); 936 937 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 938 return; 939 940 mvmsta = iwl_mvm_sta_from_mac80211(sta); 941 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 942 943 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 944 945 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 946 tid_to_mac80211_ac[tid], ssn, 947 wdg_timeout, true); 948 if (ret) { 949 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 950 return; 951 } 952 953 /* If aggs should be turned back on - do it */ 954 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 955 struct iwl_mvm_add_sta_cmd cmd = {0}; 956 957 mvmsta->tid_disable_agg &= ~BIT(tid); 958 959 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 960 cmd.sta_id = mvmsta->sta_id; 961 cmd.add_modify = STA_MODE_MODIFY; 962 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 963 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 964 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 965 966 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 967 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 968 if (!ret) { 969 IWL_DEBUG_TX_QUEUES(mvm, 970 "TXQ #%d is now aggregated again\n", 971 queue); 972 973 /* Mark queue intenally as aggregating again */ 974 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 975 } 976 } 977 978 spin_lock_bh(&mvm->queue_info_lock); 979 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 980 spin_unlock_bh(&mvm->queue_info_lock); 981 } 982 983 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 984 { 985 if (tid == IWL_MAX_TID_COUNT) 986 return IEEE80211_AC_VO; /* MGMT */ 987 988 return tid_to_mac80211_ac[tid]; 989 } 990 991 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 992 struct ieee80211_sta *sta, int tid) 993 { 994 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 995 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 996 struct sk_buff *skb; 997 struct ieee80211_hdr *hdr; 998 struct sk_buff_head deferred_tx; 999 u8 mac_queue; 1000 bool no_queue = false; /* Marks if there is a problem with the queue */ 1001 u8 ac; 1002 1003 lockdep_assert_held(&mvm->mutex); 1004 1005 skb = skb_peek(&tid_data->deferred_tx_frames); 1006 if (!skb) 1007 return; 1008 hdr = (void *)skb->data; 1009 1010 ac = iwl_mvm_tid_to_ac_queue(tid); 1011 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1012 1013 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE && 1014 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1015 IWL_ERR(mvm, 1016 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1017 mvmsta->sta_id, tid); 1018 1019 /* 1020 * Mark queue as problematic so later the deferred traffic is 1021 * freed, as we can do nothing with it 1022 */ 1023 no_queue = true; 1024 } 1025 1026 __skb_queue_head_init(&deferred_tx); 1027 1028 /* Disable bottom-halves when entering TX path */ 1029 local_bh_disable(); 1030 spin_lock(&mvmsta->lock); 1031 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1032 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1033 spin_unlock(&mvmsta->lock); 1034 1035 while ((skb = __skb_dequeue(&deferred_tx))) 1036 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1037 ieee80211_free_txskb(mvm->hw, skb); 1038 local_bh_enable(); 1039 1040 /* Wake queue */ 1041 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1042 } 1043 1044 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1045 { 1046 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1047 add_stream_wk); 1048 struct ieee80211_sta *sta; 1049 struct iwl_mvm_sta *mvmsta; 1050 unsigned long deferred_tid_traffic; 1051 int queue, sta_id, tid; 1052 1053 /* Check inactivity of queues */ 1054 iwl_mvm_inactivity_check(mvm); 1055 1056 mutex_lock(&mvm->mutex); 1057 1058 /* Reconfigure queues requiring reconfiguation */ 1059 for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) { 1060 bool reconfig; 1061 bool change_owner; 1062 1063 spin_lock_bh(&mvm->queue_info_lock); 1064 reconfig = (mvm->queue_info[queue].status == 1065 IWL_MVM_QUEUE_RECONFIGURING); 1066 1067 /* 1068 * We need to take into account a situation in which a TXQ was 1069 * allocated to TID x, and then turned shared by adding TIDs y 1070 * and z. If TID x becomes inactive and is removed from the TXQ, 1071 * ownership must be given to one of the remaining TIDs. 1072 * This is mainly because if TID x continues - a new queue can't 1073 * be allocated for it as long as it is an owner of another TXQ. 1074 */ 1075 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1076 BIT(mvm->queue_info[queue].txq_tid)) && 1077 (mvm->queue_info[queue].status == 1078 IWL_MVM_QUEUE_SHARED); 1079 spin_unlock_bh(&mvm->queue_info_lock); 1080 1081 if (reconfig) 1082 iwl_mvm_unshare_queue(mvm, queue); 1083 else if (change_owner) 1084 iwl_mvm_change_queue_owner(mvm, queue); 1085 } 1086 1087 /* Go over all stations with deferred traffic */ 1088 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1089 IWL_MVM_STATION_COUNT) { 1090 clear_bit(sta_id, mvm->sta_deferred_frames); 1091 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1092 lockdep_is_held(&mvm->mutex)); 1093 if (IS_ERR_OR_NULL(sta)) 1094 continue; 1095 1096 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1097 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1098 1099 for_each_set_bit(tid, &deferred_tid_traffic, 1100 IWL_MAX_TID_COUNT + 1) 1101 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1102 } 1103 1104 mutex_unlock(&mvm->mutex); 1105 } 1106 1107 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1108 struct ieee80211_sta *sta, 1109 enum nl80211_iftype vif_type) 1110 { 1111 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1112 int queue; 1113 1114 /* 1115 * Check for inactive queues, so we don't reach a situation where we 1116 * can't add a STA due to a shortage in queues that doesn't really exist 1117 */ 1118 iwl_mvm_inactivity_check(mvm); 1119 1120 spin_lock_bh(&mvm->queue_info_lock); 1121 1122 /* Make sure we have free resources for this STA */ 1123 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1124 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1125 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1126 IWL_MVM_QUEUE_FREE)) 1127 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1128 else 1129 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1130 IWL_MVM_DQA_MIN_DATA_QUEUE, 1131 IWL_MVM_DQA_MAX_DATA_QUEUE); 1132 if (queue < 0) { 1133 spin_unlock_bh(&mvm->queue_info_lock); 1134 IWL_ERR(mvm, "No available queues for new station\n"); 1135 return -ENOSPC; 1136 } 1137 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1138 1139 spin_unlock_bh(&mvm->queue_info_lock); 1140 1141 mvmsta->reserved_queue = queue; 1142 1143 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1144 queue, mvmsta->sta_id); 1145 1146 return 0; 1147 } 1148 1149 /* 1150 * In DQA mode, after a HW restart the queues should be allocated as before, in 1151 * order to avoid race conditions when there are shared queues. This function 1152 * does the re-mapping and queue allocation. 1153 * 1154 * Note that re-enabling aggregations isn't done in this function. 1155 */ 1156 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1157 struct iwl_mvm_sta *mvm_sta) 1158 { 1159 unsigned int wdg_timeout = 1160 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1161 int i; 1162 struct iwl_trans_txq_scd_cfg cfg = { 1163 .sta_id = mvm_sta->sta_id, 1164 .frame_limit = IWL_FRAME_LIMIT, 1165 }; 1166 1167 /* Make sure reserved queue is still marked as such (or allocated) */ 1168 mvm->queue_info[mvm_sta->reserved_queue].status = 1169 IWL_MVM_QUEUE_RESERVED; 1170 1171 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1172 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1173 int txq_id = tid_data->txq_id; 1174 int ac; 1175 u8 mac_queue; 1176 1177 if (txq_id == IEEE80211_INVAL_HW_QUEUE) 1178 continue; 1179 1180 skb_queue_head_init(&tid_data->deferred_tx_frames); 1181 1182 ac = tid_to_mac80211_ac[i]; 1183 mac_queue = mvm_sta->vif->hw_queue[ac]; 1184 1185 cfg.tid = i; 1186 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac]; 1187 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1188 txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1189 1190 IWL_DEBUG_TX_QUEUES(mvm, 1191 "Re-mapping sta %d tid %d to queue %d\n", 1192 mvm_sta->sta_id, i, txq_id); 1193 1194 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, 1195 IEEE80211_SEQ_TO_SN(tid_data->seq_number), 1196 &cfg, wdg_timeout); 1197 1198 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1199 } 1200 1201 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0); 1202 } 1203 1204 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1205 struct ieee80211_vif *vif, 1206 struct ieee80211_sta *sta) 1207 { 1208 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1209 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1210 struct iwl_mvm_rxq_dup_data *dup_data; 1211 int i, ret, sta_id; 1212 1213 lockdep_assert_held(&mvm->mutex); 1214 1215 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1216 sta_id = iwl_mvm_find_free_sta_id(mvm, 1217 ieee80211_vif_type_p2p(vif)); 1218 else 1219 sta_id = mvm_sta->sta_id; 1220 1221 if (sta_id == IWL_MVM_STATION_COUNT) 1222 return -ENOSPC; 1223 1224 spin_lock_init(&mvm_sta->lock); 1225 1226 /* In DQA mode, if this is a HW restart, re-alloc existing queues */ 1227 if (iwl_mvm_is_dqa_supported(mvm) && 1228 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1229 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1230 goto update_fw; 1231 } 1232 1233 mvm_sta->sta_id = sta_id; 1234 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1235 mvmvif->color); 1236 mvm_sta->vif = vif; 1237 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1238 mvm_sta->tx_protection = 0; 1239 mvm_sta->tt_tx_protection = false; 1240 1241 /* HW restart, don't assume the memory has been zeroed */ 1242 atomic_set(&mvm->pending_frames[sta_id], 0); 1243 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1244 mvm_sta->tfd_queue_msk = 0; 1245 1246 /* 1247 * Allocate new queues for a TDLS station, unless we're in DQA mode, 1248 * and then they'll be allocated dynamically 1249 */ 1250 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) { 1251 ret = iwl_mvm_tdls_sta_init(mvm, sta); 1252 if (ret) 1253 return ret; 1254 } else if (!iwl_mvm_is_dqa_supported(mvm)) { 1255 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1256 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 1257 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); 1258 } 1259 1260 /* for HW restart - reset everything but the sequence number */ 1261 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1262 u16 seq = mvm_sta->tid_data[i].seq_number; 1263 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1264 mvm_sta->tid_data[i].seq_number = seq; 1265 1266 if (!iwl_mvm_is_dqa_supported(mvm)) 1267 continue; 1268 1269 /* 1270 * Mark all queues for this STA as unallocated and defer TX 1271 * frames until the queue is allocated 1272 */ 1273 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; 1274 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1275 } 1276 mvm_sta->deferred_traffic_tid_map = 0; 1277 mvm_sta->agg_tids = 0; 1278 1279 if (iwl_mvm_has_new_rx_api(mvm) && 1280 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1281 dup_data = kcalloc(mvm->trans->num_rx_queues, 1282 sizeof(*dup_data), 1283 GFP_KERNEL); 1284 if (!dup_data) 1285 return -ENOMEM; 1286 mvm_sta->dup_data = dup_data; 1287 } 1288 1289 if (iwl_mvm_is_dqa_supported(mvm)) { 1290 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1291 ieee80211_vif_type_p2p(vif)); 1292 if (ret) 1293 goto err; 1294 } 1295 1296 update_fw: 1297 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0); 1298 if (ret) 1299 goto err; 1300 1301 if (vif->type == NL80211_IFTYPE_STATION) { 1302 if (!sta->tdls) { 1303 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); 1304 mvmvif->ap_sta_id = sta_id; 1305 } else { 1306 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); 1307 } 1308 } 1309 1310 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1311 1312 return 0; 1313 1314 err: 1315 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1316 iwl_mvm_tdls_sta_deinit(mvm, sta); 1317 return ret; 1318 } 1319 1320 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1321 bool drain) 1322 { 1323 struct iwl_mvm_add_sta_cmd cmd = {}; 1324 int ret; 1325 u32 status; 1326 1327 lockdep_assert_held(&mvm->mutex); 1328 1329 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1330 cmd.sta_id = mvmsta->sta_id; 1331 cmd.add_modify = STA_MODE_MODIFY; 1332 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1333 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1334 1335 status = ADD_STA_SUCCESS; 1336 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1337 iwl_mvm_add_sta_cmd_size(mvm), 1338 &cmd, &status); 1339 if (ret) 1340 return ret; 1341 1342 switch (status & IWL_ADD_STA_STATUS_MASK) { 1343 case ADD_STA_SUCCESS: 1344 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1345 mvmsta->sta_id); 1346 break; 1347 default: 1348 ret = -EIO; 1349 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1350 mvmsta->sta_id); 1351 break; 1352 } 1353 1354 return ret; 1355 } 1356 1357 /* 1358 * Remove a station from the FW table. Before sending the command to remove 1359 * the station validate that the station is indeed known to the driver (sanity 1360 * only). 1361 */ 1362 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1363 { 1364 struct ieee80211_sta *sta; 1365 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1366 .sta_id = sta_id, 1367 }; 1368 int ret; 1369 1370 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1371 lockdep_is_held(&mvm->mutex)); 1372 1373 /* Note: internal stations are marked as error values */ 1374 if (!sta) { 1375 IWL_ERR(mvm, "Invalid station id\n"); 1376 return -EINVAL; 1377 } 1378 1379 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1380 sizeof(rm_sta_cmd), &rm_sta_cmd); 1381 if (ret) { 1382 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1383 return ret; 1384 } 1385 1386 return 0; 1387 } 1388 1389 void iwl_mvm_sta_drained_wk(struct work_struct *wk) 1390 { 1391 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); 1392 u8 sta_id; 1393 1394 /* 1395 * The mutex is needed because of the SYNC cmd, but not only: if the 1396 * work would run concurrently with iwl_mvm_rm_sta, it would run before 1397 * iwl_mvm_rm_sta sets the station as busy, and exit. Then 1398 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean 1399 * that later. 1400 */ 1401 mutex_lock(&mvm->mutex); 1402 1403 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { 1404 int ret; 1405 struct ieee80211_sta *sta = 1406 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1407 lockdep_is_held(&mvm->mutex)); 1408 1409 /* 1410 * This station is in use or RCU-removed; the latter happens in 1411 * managed mode, where mac80211 removes the station before we 1412 * can remove it from firmware (we can only do that after the 1413 * MAC is marked unassociated), and possibly while the deauth 1414 * frame to disconnect from the AP is still queued. Then, the 1415 * station pointer is -ENOENT when the last skb is reclaimed. 1416 */ 1417 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) 1418 continue; 1419 1420 if (PTR_ERR(sta) == -EINVAL) { 1421 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", 1422 sta_id); 1423 continue; 1424 } 1425 1426 if (!sta) { 1427 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", 1428 sta_id); 1429 continue; 1430 } 1431 1432 WARN_ON(PTR_ERR(sta) != -EBUSY); 1433 /* This station was removed and we waited until it got drained, 1434 * we can now proceed and remove it. 1435 */ 1436 ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1437 if (ret) { 1438 IWL_ERR(mvm, 1439 "Couldn't remove sta %d after it was drained\n", 1440 sta_id); 1441 continue; 1442 } 1443 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1444 clear_bit(sta_id, mvm->sta_drained); 1445 1446 if (mvm->tfd_drained[sta_id]) { 1447 unsigned long i, msk = mvm->tfd_drained[sta_id]; 1448 1449 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) 1450 iwl_mvm_disable_txq(mvm, i, i, 1451 IWL_MAX_TID_COUNT, 0); 1452 1453 mvm->tfd_drained[sta_id] = 0; 1454 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", 1455 sta_id, msk); 1456 } 1457 } 1458 1459 mutex_unlock(&mvm->mutex); 1460 } 1461 1462 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1463 struct ieee80211_vif *vif, 1464 struct iwl_mvm_sta *mvm_sta) 1465 { 1466 int ac; 1467 int i; 1468 1469 lockdep_assert_held(&mvm->mutex); 1470 1471 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1472 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE) 1473 continue; 1474 1475 ac = iwl_mvm_tid_to_ac_queue(i); 1476 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1477 vif->hw_queue[ac], i, 0); 1478 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; 1479 } 1480 } 1481 1482 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1483 struct ieee80211_vif *vif, 1484 struct ieee80211_sta *sta) 1485 { 1486 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1487 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1488 int ret; 1489 1490 lockdep_assert_held(&mvm->mutex); 1491 1492 if (iwl_mvm_has_new_rx_api(mvm)) 1493 kfree(mvm_sta->dup_data); 1494 1495 if ((vif->type == NL80211_IFTYPE_STATION && 1496 mvmvif->ap_sta_id == mvm_sta->sta_id) || 1497 iwl_mvm_is_dqa_supported(mvm)){ 1498 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1499 if (ret) 1500 return ret; 1501 /* flush its queues here since we are freeing mvm_sta */ 1502 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); 1503 if (ret) 1504 return ret; 1505 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 1506 mvm_sta->tfd_queue_msk); 1507 if (ret) 1508 return ret; 1509 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1510 1511 /* If DQA is supported - the queues can be disabled now */ 1512 if (iwl_mvm_is_dqa_supported(mvm)) 1513 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1514 1515 /* If there is a TXQ still marked as reserved - free it */ 1516 if (iwl_mvm_is_dqa_supported(mvm) && 1517 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1518 u8 reserved_txq = mvm_sta->reserved_queue; 1519 enum iwl_mvm_queue_status *status; 1520 1521 /* 1522 * If no traffic has gone through the reserved TXQ - it 1523 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1524 * should be manually marked as free again 1525 */ 1526 spin_lock_bh(&mvm->queue_info_lock); 1527 status = &mvm->queue_info[reserved_txq].status; 1528 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1529 (*status != IWL_MVM_QUEUE_FREE), 1530 "sta_id %d reserved txq %d status %d", 1531 mvm_sta->sta_id, reserved_txq, *status)) { 1532 spin_unlock_bh(&mvm->queue_info_lock); 1533 return -EINVAL; 1534 } 1535 1536 *status = IWL_MVM_QUEUE_FREE; 1537 spin_unlock_bh(&mvm->queue_info_lock); 1538 } 1539 1540 if (vif->type == NL80211_IFTYPE_STATION && 1541 mvmvif->ap_sta_id == mvm_sta->sta_id) { 1542 /* if associated - we can't remove the AP STA now */ 1543 if (vif->bss_conf.assoc) 1544 return ret; 1545 1546 /* unassoc - go ahead - remove the AP STA now */ 1547 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 1548 1549 /* clear d0i3_ap_sta_id if no longer relevant */ 1550 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id) 1551 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; 1552 } 1553 } 1554 1555 /* 1556 * This shouldn't happen - the TDLS channel switch should be canceled 1557 * before the STA is removed. 1558 */ 1559 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) { 1560 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; 1561 cancel_delayed_work(&mvm->tdls_cs.dwork); 1562 } 1563 1564 /* 1565 * Make sure that the tx response code sees the station as -EBUSY and 1566 * calls the drain worker. 1567 */ 1568 spin_lock_bh(&mvm_sta->lock); 1569 /* 1570 * There are frames pending on the AC queues for this station. 1571 * We need to wait until all the frames are drained... 1572 */ 1573 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { 1574 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], 1575 ERR_PTR(-EBUSY)); 1576 spin_unlock_bh(&mvm_sta->lock); 1577 1578 /* disable TDLS sta queues on drain complete */ 1579 if (sta->tdls) { 1580 mvm->tfd_drained[mvm_sta->sta_id] = 1581 mvm_sta->tfd_queue_msk; 1582 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", 1583 mvm_sta->sta_id); 1584 } 1585 1586 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1587 } else { 1588 spin_unlock_bh(&mvm_sta->lock); 1589 1590 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1591 iwl_mvm_tdls_sta_deinit(mvm, sta); 1592 1593 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1594 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1595 } 1596 1597 return ret; 1598 } 1599 1600 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1601 struct ieee80211_vif *vif, 1602 u8 sta_id) 1603 { 1604 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1605 1606 lockdep_assert_held(&mvm->mutex); 1607 1608 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1609 return ret; 1610 } 1611 1612 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1613 struct iwl_mvm_int_sta *sta, 1614 u32 qmask, enum nl80211_iftype iftype) 1615 { 1616 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1617 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1618 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) 1619 return -ENOSPC; 1620 } 1621 1622 sta->tfd_queue_msk = qmask; 1623 1624 /* put a non-NULL value so iterating over the stations won't stop */ 1625 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1626 return 0; 1627 } 1628 1629 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, 1630 struct iwl_mvm_int_sta *sta) 1631 { 1632 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1633 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1634 sta->sta_id = IWL_MVM_STATION_COUNT; 1635 } 1636 1637 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1638 struct iwl_mvm_int_sta *sta, 1639 const u8 *addr, 1640 u16 mac_id, u16 color) 1641 { 1642 struct iwl_mvm_add_sta_cmd cmd; 1643 int ret; 1644 u32 status; 1645 1646 lockdep_assert_held(&mvm->mutex); 1647 1648 memset(&cmd, 0, sizeof(cmd)); 1649 cmd.sta_id = sta->sta_id; 1650 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1651 color)); 1652 1653 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1654 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1655 1656 if (addr) 1657 memcpy(cmd.addr, addr, ETH_ALEN); 1658 1659 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1660 iwl_mvm_add_sta_cmd_size(mvm), 1661 &cmd, &status); 1662 if (ret) 1663 return ret; 1664 1665 switch (status & IWL_ADD_STA_STATUS_MASK) { 1666 case ADD_STA_SUCCESS: 1667 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1668 return 0; 1669 default: 1670 ret = -EIO; 1671 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1672 status); 1673 break; 1674 } 1675 return ret; 1676 } 1677 1678 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1679 { 1680 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1681 mvm->cfg->base_params->wd_timeout : 1682 IWL_WATCHDOG_DISABLED; 1683 int ret; 1684 1685 lockdep_assert_held(&mvm->mutex); 1686 1687 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1688 if (!iwl_mvm_is_dqa_supported(mvm)) 1689 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, 1690 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 1691 1692 /* Allocate aux station and assign to it the aux queue */ 1693 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1694 NL80211_IFTYPE_UNSPECIFIED); 1695 if (ret) 1696 return ret; 1697 1698 if (iwl_mvm_is_dqa_supported(mvm)) { 1699 struct iwl_trans_txq_scd_cfg cfg = { 1700 .fifo = IWL_MVM_TX_FIFO_MCAST, 1701 .sta_id = mvm->aux_sta.sta_id, 1702 .tid = IWL_MAX_TID_COUNT, 1703 .aggregate = false, 1704 .frame_limit = IWL_FRAME_LIMIT, 1705 }; 1706 1707 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg, 1708 wdg_timeout); 1709 } 1710 1711 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1712 MAC_INDEX_AUX, 0); 1713 1714 if (ret) 1715 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1716 return ret; 1717 } 1718 1719 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1720 { 1721 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1722 1723 lockdep_assert_held(&mvm->mutex); 1724 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1725 mvmvif->id, 0); 1726 } 1727 1728 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1729 { 1730 int ret; 1731 1732 lockdep_assert_held(&mvm->mutex); 1733 1734 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1735 if (ret) 1736 IWL_WARN(mvm, "Failed sending remove station\n"); 1737 1738 return ret; 1739 } 1740 1741 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1742 { 1743 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1744 } 1745 1746 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1747 { 1748 lockdep_assert_held(&mvm->mutex); 1749 1750 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1751 } 1752 1753 /* 1754 * Send the add station command for the vif's broadcast station. 1755 * Assumes that the station was already allocated. 1756 * 1757 * @mvm: the mvm component 1758 * @vif: the interface to which the broadcast station is added 1759 * @bsta: the broadcast station to add. 1760 */ 1761 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1762 { 1763 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1764 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1765 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1766 const u8 *baddr = _baddr; 1767 1768 lockdep_assert_held(&mvm->mutex); 1769 1770 if (iwl_mvm_is_dqa_supported(mvm)) { 1771 struct iwl_trans_txq_scd_cfg cfg = { 1772 .fifo = IWL_MVM_TX_FIFO_VO, 1773 .sta_id = mvmvif->bcast_sta.sta_id, 1774 .tid = IWL_MAX_TID_COUNT, 1775 .aggregate = false, 1776 .frame_limit = IWL_FRAME_LIMIT, 1777 }; 1778 unsigned int wdg_timeout = 1779 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1780 int queue; 1781 1782 if ((vif->type == NL80211_IFTYPE_AP) && 1783 (mvmvif->bcast_sta.tfd_queue_msk & 1784 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE))) 1785 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 1786 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) && 1787 (mvmvif->bcast_sta.tfd_queue_msk & 1788 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE))) 1789 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE; 1790 else if (WARN(1, "Missed required TXQ for adding bcast STA\n")) 1791 return -EINVAL; 1792 1793 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg, 1794 wdg_timeout); 1795 } 1796 1797 if (vif->type == NL80211_IFTYPE_ADHOC) 1798 baddr = vif->bss_conf.bssid; 1799 1800 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) 1801 return -ENOSPC; 1802 1803 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1804 mvmvif->id, mvmvif->color); 1805 } 1806 1807 /* Send the FW a request to remove the station from it's internal data 1808 * structures, but DO NOT remove the entry from the local data structures. */ 1809 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1810 { 1811 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1812 int ret; 1813 1814 lockdep_assert_held(&mvm->mutex); 1815 1816 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1817 if (ret) 1818 IWL_WARN(mvm, "Failed sending remove station\n"); 1819 return ret; 1820 } 1821 1822 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1823 { 1824 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1825 u32 qmask = 0; 1826 1827 lockdep_assert_held(&mvm->mutex); 1828 1829 if (!iwl_mvm_is_dqa_supported(mvm)) 1830 qmask = iwl_mvm_mac_get_queues_mask(vif); 1831 1832 if (vif->type == NL80211_IFTYPE_AP) { 1833 /* 1834 * The firmware defines the TFD queue mask to only be relevant 1835 * for *unicast* queues, so the multicast (CAB) queue shouldn't 1836 * be included. 1837 */ 1838 qmask &= ~BIT(vif->cab_queue); 1839 1840 if (iwl_mvm_is_dqa_supported(mvm)) 1841 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE); 1842 } else if (iwl_mvm_is_dqa_supported(mvm) && 1843 vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1844 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE); 1845 } 1846 1847 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, 1848 ieee80211_vif_type_p2p(vif)); 1849 } 1850 1851 /* Allocate a new station entry for the broadcast station to the given vif, 1852 * and send it to the FW. 1853 * Note that each P2P mac should have its own broadcast station. 1854 * 1855 * @mvm: the mvm component 1856 * @vif: the interface to which the broadcast station is added 1857 * @bsta: the broadcast station to add. */ 1858 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1859 { 1860 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1861 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1862 int ret; 1863 1864 lockdep_assert_held(&mvm->mutex); 1865 1866 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1867 if (ret) 1868 return ret; 1869 1870 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 1871 1872 if (ret) 1873 iwl_mvm_dealloc_int_sta(mvm, bsta); 1874 1875 return ret; 1876 } 1877 1878 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1879 { 1880 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1881 1882 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 1883 } 1884 1885 /* 1886 * Send the FW a request to remove the station from it's internal data 1887 * structures, and in addition remove it from the local data structure. 1888 */ 1889 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1890 { 1891 int ret; 1892 1893 lockdep_assert_held(&mvm->mutex); 1894 1895 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 1896 1897 iwl_mvm_dealloc_bcast_sta(mvm, vif); 1898 1899 return ret; 1900 } 1901 1902 #define IWL_MAX_RX_BA_SESSIONS 16 1903 1904 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 1905 { 1906 struct iwl_mvm_delba_notif notif = { 1907 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 1908 .metadata.sync = 1, 1909 .delba.baid = baid, 1910 }; 1911 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 1912 }; 1913 1914 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 1915 struct iwl_mvm_baid_data *data) 1916 { 1917 int i; 1918 1919 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 1920 1921 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 1922 int j; 1923 struct iwl_mvm_reorder_buffer *reorder_buf = 1924 &data->reorder_buf[i]; 1925 1926 spin_lock_bh(&reorder_buf->lock); 1927 if (likely(!reorder_buf->num_stored)) { 1928 spin_unlock_bh(&reorder_buf->lock); 1929 continue; 1930 } 1931 1932 /* 1933 * This shouldn't happen in regular DELBA since the internal 1934 * delBA notification should trigger a release of all frames in 1935 * the reorder buffer. 1936 */ 1937 WARN_ON(1); 1938 1939 for (j = 0; j < reorder_buf->buf_size; j++) 1940 __skb_queue_purge(&reorder_buf->entries[j]); 1941 /* 1942 * Prevent timer re-arm. This prevents a very far fetched case 1943 * where we timed out on the notification. There may be prior 1944 * RX frames pending in the RX queue before the notification 1945 * that might get processed between now and the actual deletion 1946 * and we would re-arm the timer although we are deleting the 1947 * reorder buffer. 1948 */ 1949 reorder_buf->removed = true; 1950 spin_unlock_bh(&reorder_buf->lock); 1951 del_timer_sync(&reorder_buf->reorder_timer); 1952 } 1953 } 1954 1955 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 1956 u32 sta_id, 1957 struct iwl_mvm_baid_data *data, 1958 u16 ssn, u8 buf_size) 1959 { 1960 int i; 1961 1962 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 1963 struct iwl_mvm_reorder_buffer *reorder_buf = 1964 &data->reorder_buf[i]; 1965 int j; 1966 1967 reorder_buf->num_stored = 0; 1968 reorder_buf->head_sn = ssn; 1969 reorder_buf->buf_size = buf_size; 1970 /* rx reorder timer */ 1971 reorder_buf->reorder_timer.function = 1972 iwl_mvm_reorder_timer_expired; 1973 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 1974 init_timer(&reorder_buf->reorder_timer); 1975 spin_lock_init(&reorder_buf->lock); 1976 reorder_buf->mvm = mvm; 1977 reorder_buf->queue = i; 1978 reorder_buf->sta_id = sta_id; 1979 for (j = 0; j < reorder_buf->buf_size; j++) 1980 __skb_queue_head_init(&reorder_buf->entries[j]); 1981 } 1982 } 1983 1984 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 1985 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 1986 { 1987 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1988 struct iwl_mvm_add_sta_cmd cmd = {}; 1989 struct iwl_mvm_baid_data *baid_data = NULL; 1990 int ret; 1991 u32 status; 1992 1993 lockdep_assert_held(&mvm->mutex); 1994 1995 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 1996 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 1997 return -ENOSPC; 1998 } 1999 2000 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2001 /* 2002 * Allocate here so if allocation fails we can bail out early 2003 * before starting the BA session in the firmware 2004 */ 2005 baid_data = kzalloc(sizeof(*baid_data) + 2006 mvm->trans->num_rx_queues * 2007 sizeof(baid_data->reorder_buf[0]), 2008 GFP_KERNEL); 2009 if (!baid_data) 2010 return -ENOMEM; 2011 } 2012 2013 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2014 cmd.sta_id = mvm_sta->sta_id; 2015 cmd.add_modify = STA_MODE_MODIFY; 2016 if (start) { 2017 cmd.add_immediate_ba_tid = (u8) tid; 2018 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2019 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2020 } else { 2021 cmd.remove_immediate_ba_tid = (u8) tid; 2022 } 2023 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2024 STA_MODIFY_REMOVE_BA_TID; 2025 2026 status = ADD_STA_SUCCESS; 2027 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2028 iwl_mvm_add_sta_cmd_size(mvm), 2029 &cmd, &status); 2030 if (ret) 2031 goto out_free; 2032 2033 switch (status & IWL_ADD_STA_STATUS_MASK) { 2034 case ADD_STA_SUCCESS: 2035 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2036 start ? "start" : "stopp"); 2037 break; 2038 case ADD_STA_IMMEDIATE_BA_FAILURE: 2039 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2040 ret = -ENOSPC; 2041 break; 2042 default: 2043 ret = -EIO; 2044 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2045 start ? "start" : "stopp", status); 2046 break; 2047 } 2048 2049 if (ret) 2050 goto out_free; 2051 2052 if (start) { 2053 u8 baid; 2054 2055 mvm->rx_ba_sessions++; 2056 2057 if (!iwl_mvm_has_new_rx_api(mvm)) 2058 return 0; 2059 2060 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2061 ret = -EINVAL; 2062 goto out_free; 2063 } 2064 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2065 IWL_ADD_STA_BAID_SHIFT); 2066 baid_data->baid = baid; 2067 baid_data->timeout = timeout; 2068 baid_data->last_rx = jiffies; 2069 setup_timer(&baid_data->session_timer, 2070 iwl_mvm_rx_agg_session_expired, 2071 (unsigned long)&mvm->baid_map[baid]); 2072 baid_data->mvm = mvm; 2073 baid_data->tid = tid; 2074 baid_data->sta_id = mvm_sta->sta_id; 2075 2076 mvm_sta->tid_to_baid[tid] = baid; 2077 if (timeout) 2078 mod_timer(&baid_data->session_timer, 2079 TU_TO_EXP_TIME(timeout * 2)); 2080 2081 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 2082 baid_data, ssn, buf_size); 2083 /* 2084 * protect the BA data with RCU to cover a case where our 2085 * internal RX sync mechanism will timeout (not that it's 2086 * supposed to happen) and we will free the session data while 2087 * RX is being processed in parallel 2088 */ 2089 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2090 mvm_sta->sta_id, tid, baid); 2091 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2092 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2093 } else { 2094 u8 baid = mvm_sta->tid_to_baid[tid]; 2095 2096 if (mvm->rx_ba_sessions > 0) 2097 /* check that restart flow didn't zero the counter */ 2098 mvm->rx_ba_sessions--; 2099 if (!iwl_mvm_has_new_rx_api(mvm)) 2100 return 0; 2101 2102 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2103 return -EINVAL; 2104 2105 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2106 if (WARN_ON(!baid_data)) 2107 return -EINVAL; 2108 2109 /* synchronize all rx queues so we can safely delete */ 2110 iwl_mvm_free_reorder(mvm, baid_data); 2111 del_timer_sync(&baid_data->session_timer); 2112 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2113 kfree_rcu(baid_data, rcu_head); 2114 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2115 } 2116 return 0; 2117 2118 out_free: 2119 kfree(baid_data); 2120 return ret; 2121 } 2122 2123 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2124 int tid, u8 queue, bool start) 2125 { 2126 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2127 struct iwl_mvm_add_sta_cmd cmd = {}; 2128 int ret; 2129 u32 status; 2130 2131 lockdep_assert_held(&mvm->mutex); 2132 2133 if (start) { 2134 mvm_sta->tfd_queue_msk |= BIT(queue); 2135 mvm_sta->tid_disable_agg &= ~BIT(tid); 2136 } else { 2137 /* In DQA-mode the queue isn't removed on agg termination */ 2138 if (!iwl_mvm_is_dqa_supported(mvm)) 2139 mvm_sta->tfd_queue_msk &= ~BIT(queue); 2140 mvm_sta->tid_disable_agg |= BIT(tid); 2141 } 2142 2143 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2144 cmd.sta_id = mvm_sta->sta_id; 2145 cmd.add_modify = STA_MODE_MODIFY; 2146 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; 2147 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2148 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2149 2150 status = ADD_STA_SUCCESS; 2151 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2152 iwl_mvm_add_sta_cmd_size(mvm), 2153 &cmd, &status); 2154 if (ret) 2155 return ret; 2156 2157 switch (status & IWL_ADD_STA_STATUS_MASK) { 2158 case ADD_STA_SUCCESS: 2159 break; 2160 default: 2161 ret = -EIO; 2162 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2163 start ? "start" : "stopp", status); 2164 break; 2165 } 2166 2167 return ret; 2168 } 2169 2170 const u8 tid_to_mac80211_ac[] = { 2171 IEEE80211_AC_BE, 2172 IEEE80211_AC_BK, 2173 IEEE80211_AC_BK, 2174 IEEE80211_AC_BE, 2175 IEEE80211_AC_VI, 2176 IEEE80211_AC_VI, 2177 IEEE80211_AC_VO, 2178 IEEE80211_AC_VO, 2179 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2180 }; 2181 2182 static const u8 tid_to_ucode_ac[] = { 2183 AC_BE, 2184 AC_BK, 2185 AC_BK, 2186 AC_BE, 2187 AC_VI, 2188 AC_VI, 2189 AC_VO, 2190 AC_VO, 2191 }; 2192 2193 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2194 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2195 { 2196 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2197 struct iwl_mvm_tid_data *tid_data; 2198 int txq_id; 2199 int ret; 2200 2201 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2202 return -EINVAL; 2203 2204 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2205 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 2206 mvmsta->tid_data[tid].state); 2207 return -ENXIO; 2208 } 2209 2210 lockdep_assert_held(&mvm->mutex); 2211 2212 spin_lock_bh(&mvmsta->lock); 2213 2214 /* possible race condition - we entered D0i3 while starting agg */ 2215 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2216 spin_unlock_bh(&mvmsta->lock); 2217 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2218 return -EIO; 2219 } 2220 2221 spin_lock(&mvm->queue_info_lock); 2222 2223 /* 2224 * Note the possible cases: 2225 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2226 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2227 * one and mark it as reserved 2228 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2229 * non-DQA mode, since the TXQ hasn't yet been allocated 2230 */ 2231 txq_id = mvmsta->tid_data[tid].txq_id; 2232 if (iwl_mvm_is_dqa_supported(mvm) && 2233 unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) { 2234 ret = -ENXIO; 2235 IWL_DEBUG_TX_QUEUES(mvm, 2236 "Can't start tid %d agg on shared queue!\n", 2237 tid); 2238 goto release_locks; 2239 } else if (!iwl_mvm_is_dqa_supported(mvm) || 2240 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2241 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2242 mvm->first_agg_queue, 2243 mvm->last_agg_queue); 2244 if (txq_id < 0) { 2245 ret = txq_id; 2246 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2247 goto release_locks; 2248 } 2249 2250 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2251 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2252 } 2253 2254 spin_unlock(&mvm->queue_info_lock); 2255 2256 IWL_DEBUG_TX_QUEUES(mvm, 2257 "AGG for tid %d will be on queue #%d\n", 2258 tid, txq_id); 2259 2260 tid_data = &mvmsta->tid_data[tid]; 2261 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2262 tid_data->txq_id = txq_id; 2263 *ssn = tid_data->ssn; 2264 2265 IWL_DEBUG_TX_QUEUES(mvm, 2266 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2267 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2268 tid_data->next_reclaimed); 2269 2270 if (tid_data->ssn == tid_data->next_reclaimed) { 2271 tid_data->state = IWL_AGG_STARTING; 2272 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2273 } else { 2274 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2275 } 2276 2277 ret = 0; 2278 goto out; 2279 2280 release_locks: 2281 spin_unlock(&mvm->queue_info_lock); 2282 out: 2283 spin_unlock_bh(&mvmsta->lock); 2284 2285 return ret; 2286 } 2287 2288 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2289 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2290 bool amsdu) 2291 { 2292 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2293 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2294 unsigned int wdg_timeout = 2295 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2296 int queue, ret; 2297 bool alloc_queue = true; 2298 enum iwl_mvm_queue_status queue_status; 2299 u16 ssn; 2300 2301 struct iwl_trans_txq_scd_cfg cfg = { 2302 .sta_id = mvmsta->sta_id, 2303 .tid = tid, 2304 .frame_limit = buf_size, 2305 .aggregate = true, 2306 }; 2307 2308 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2309 != IWL_MAX_TID_COUNT); 2310 2311 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2312 2313 spin_lock_bh(&mvmsta->lock); 2314 ssn = tid_data->ssn; 2315 queue = tid_data->txq_id; 2316 tid_data->state = IWL_AGG_ON; 2317 mvmsta->agg_tids |= BIT(tid); 2318 tid_data->ssn = 0xffff; 2319 tid_data->amsdu_in_ampdu_allowed = amsdu; 2320 spin_unlock_bh(&mvmsta->lock); 2321 2322 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2323 2324 spin_lock_bh(&mvm->queue_info_lock); 2325 queue_status = mvm->queue_info[queue].status; 2326 spin_unlock_bh(&mvm->queue_info_lock); 2327 2328 /* In DQA mode, the existing queue might need to be reconfigured */ 2329 if (iwl_mvm_is_dqa_supported(mvm)) { 2330 /* Maybe there is no need to even alloc a queue... */ 2331 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2332 alloc_queue = false; 2333 2334 /* 2335 * Only reconfig the SCD for the queue if the window size has 2336 * changed from current (become smaller) 2337 */ 2338 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2339 /* 2340 * If reconfiguring an existing queue, it first must be 2341 * drained 2342 */ 2343 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 2344 BIT(queue)); 2345 if (ret) { 2346 IWL_ERR(mvm, 2347 "Error draining queue before reconfig\n"); 2348 return ret; 2349 } 2350 2351 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2352 mvmsta->sta_id, tid, 2353 buf_size, ssn); 2354 if (ret) { 2355 IWL_ERR(mvm, 2356 "Error reconfiguring TXQ #%d\n", queue); 2357 return ret; 2358 } 2359 } 2360 } 2361 2362 if (alloc_queue) 2363 iwl_mvm_enable_txq(mvm, queue, 2364 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2365 &cfg, wdg_timeout); 2366 2367 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2368 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2369 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2370 if (ret) 2371 return -EIO; 2372 } 2373 2374 /* No need to mark as reserved */ 2375 spin_lock_bh(&mvm->queue_info_lock); 2376 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2377 spin_unlock_bh(&mvm->queue_info_lock); 2378 2379 /* 2380 * Even though in theory the peer could have different 2381 * aggregation reorder buffer sizes for different sessions, 2382 * our ucode doesn't allow for that and has a global limit 2383 * for each station. Therefore, use the minimum of all the 2384 * aggregation sessions and our default value. 2385 */ 2386 mvmsta->max_agg_bufsize = 2387 min(mvmsta->max_agg_bufsize, buf_size); 2388 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2389 2390 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2391 sta->addr, tid); 2392 2393 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2394 } 2395 2396 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2397 struct ieee80211_sta *sta, u16 tid) 2398 { 2399 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2400 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2401 u16 txq_id; 2402 int err; 2403 2404 /* 2405 * If mac80211 is cleaning its state, then say that we finished since 2406 * our state has been cleared anyway. 2407 */ 2408 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2409 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2410 return 0; 2411 } 2412 2413 spin_lock_bh(&mvmsta->lock); 2414 2415 txq_id = tid_data->txq_id; 2416 2417 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2418 mvmsta->sta_id, tid, txq_id, tid_data->state); 2419 2420 mvmsta->agg_tids &= ~BIT(tid); 2421 2422 spin_lock_bh(&mvm->queue_info_lock); 2423 /* 2424 * The TXQ is marked as reserved only if no traffic came through yet 2425 * This means no traffic has been sent on this TID (agg'd or not), so 2426 * we no longer have use for the queue. Since it hasn't even been 2427 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2428 * free. 2429 */ 2430 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2431 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2432 2433 spin_unlock_bh(&mvm->queue_info_lock); 2434 2435 switch (tid_data->state) { 2436 case IWL_AGG_ON: 2437 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2438 2439 IWL_DEBUG_TX_QUEUES(mvm, 2440 "ssn = %d, next_recl = %d\n", 2441 tid_data->ssn, tid_data->next_reclaimed); 2442 2443 /* There are still packets for this RA / TID in the HW */ 2444 if (tid_data->ssn != tid_data->next_reclaimed) { 2445 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; 2446 err = 0; 2447 break; 2448 } 2449 2450 tid_data->ssn = 0xffff; 2451 tid_data->state = IWL_AGG_OFF; 2452 spin_unlock_bh(&mvmsta->lock); 2453 2454 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2455 2456 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2457 2458 if (!iwl_mvm_is_dqa_supported(mvm)) { 2459 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2460 2461 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0); 2462 } 2463 return 0; 2464 case IWL_AGG_STARTING: 2465 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2466 /* 2467 * The agg session has been stopped before it was set up. This 2468 * can happen when the AddBA timer times out for example. 2469 */ 2470 2471 /* No barriers since we are under mutex */ 2472 lockdep_assert_held(&mvm->mutex); 2473 2474 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2475 tid_data->state = IWL_AGG_OFF; 2476 err = 0; 2477 break; 2478 default: 2479 IWL_ERR(mvm, 2480 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2481 mvmsta->sta_id, tid, tid_data->state); 2482 IWL_ERR(mvm, 2483 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2484 err = -EINVAL; 2485 } 2486 2487 spin_unlock_bh(&mvmsta->lock); 2488 2489 return err; 2490 } 2491 2492 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2493 struct ieee80211_sta *sta, u16 tid) 2494 { 2495 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2496 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2497 u16 txq_id; 2498 enum iwl_mvm_agg_state old_state; 2499 2500 /* 2501 * First set the agg state to OFF to avoid calling 2502 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2503 */ 2504 spin_lock_bh(&mvmsta->lock); 2505 txq_id = tid_data->txq_id; 2506 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2507 mvmsta->sta_id, tid, txq_id, tid_data->state); 2508 old_state = tid_data->state; 2509 tid_data->state = IWL_AGG_OFF; 2510 mvmsta->agg_tids &= ~BIT(tid); 2511 spin_unlock_bh(&mvmsta->lock); 2512 2513 spin_lock_bh(&mvm->queue_info_lock); 2514 /* 2515 * The TXQ is marked as reserved only if no traffic came through yet 2516 * This means no traffic has been sent on this TID (agg'd or not), so 2517 * we no longer have use for the queue. Since it hasn't even been 2518 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2519 * free. 2520 */ 2521 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2522 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2523 spin_unlock_bh(&mvm->queue_info_lock); 2524 2525 if (old_state >= IWL_AGG_ON) { 2526 iwl_mvm_drain_sta(mvm, mvmsta, true); 2527 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2528 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2529 iwl_trans_wait_tx_queue_empty(mvm->trans, 2530 mvmsta->tfd_queue_msk); 2531 iwl_mvm_drain_sta(mvm, mvmsta, false); 2532 2533 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2534 2535 if (!iwl_mvm_is_dqa_supported(mvm)) { 2536 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2537 2538 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue, 2539 tid, 0); 2540 } 2541 } 2542 2543 return 0; 2544 } 2545 2546 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2547 { 2548 int i, max = -1, max_offs = -1; 2549 2550 lockdep_assert_held(&mvm->mutex); 2551 2552 /* Pick the unused key offset with the highest 'deleted' 2553 * counter. Every time a key is deleted, all the counters 2554 * are incremented and the one that was just deleted is 2555 * reset to zero. Thus, the highest counter is the one 2556 * that was deleted longest ago. Pick that one. 2557 */ 2558 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2559 if (test_bit(i, mvm->fw_key_table)) 2560 continue; 2561 if (mvm->fw_key_deleted[i] > max) { 2562 max = mvm->fw_key_deleted[i]; 2563 max_offs = i; 2564 } 2565 } 2566 2567 if (max_offs < 0) 2568 return STA_KEY_IDX_INVALID; 2569 2570 return max_offs; 2571 } 2572 2573 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2574 struct ieee80211_vif *vif, 2575 struct ieee80211_sta *sta) 2576 { 2577 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2578 2579 if (sta) 2580 return iwl_mvm_sta_from_mac80211(sta); 2581 2582 /* 2583 * The device expects GTKs for station interfaces to be 2584 * installed as GTKs for the AP station. If we have no 2585 * station ID, then use AP's station ID. 2586 */ 2587 if (vif->type == NL80211_IFTYPE_STATION && 2588 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 2589 u8 sta_id = mvmvif->ap_sta_id; 2590 2591 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2592 lockdep_is_held(&mvm->mutex)); 2593 2594 /* 2595 * It is possible that the 'sta' parameter is NULL, 2596 * for example when a GTK is removed - the sta_id will then 2597 * be the AP ID, and no station was passed by mac80211. 2598 */ 2599 if (IS_ERR_OR_NULL(sta)) 2600 return NULL; 2601 2602 return iwl_mvm_sta_from_mac80211(sta); 2603 } 2604 2605 return NULL; 2606 } 2607 2608 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2609 struct iwl_mvm_sta *mvm_sta, 2610 struct ieee80211_key_conf *keyconf, bool mcast, 2611 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2612 u8 key_offset) 2613 { 2614 struct iwl_mvm_add_sta_key_cmd cmd = {}; 2615 __le16 key_flags; 2616 int ret; 2617 u32 status; 2618 u16 keyidx; 2619 int i; 2620 u8 sta_id = mvm_sta->sta_id; 2621 2622 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2623 STA_KEY_FLG_KEYID_MSK; 2624 key_flags = cpu_to_le16(keyidx); 2625 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2626 2627 switch (keyconf->cipher) { 2628 case WLAN_CIPHER_SUITE_TKIP: 2629 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2630 cmd.tkip_rx_tsc_byte2 = tkip_iv32; 2631 for (i = 0; i < 5; i++) 2632 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); 2633 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2634 break; 2635 case WLAN_CIPHER_SUITE_CCMP: 2636 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2637 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2638 break; 2639 case WLAN_CIPHER_SUITE_WEP104: 2640 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2641 /* fall through */ 2642 case WLAN_CIPHER_SUITE_WEP40: 2643 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2644 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); 2645 break; 2646 case WLAN_CIPHER_SUITE_GCMP_256: 2647 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2648 /* fall through */ 2649 case WLAN_CIPHER_SUITE_GCMP: 2650 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2651 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2652 break; 2653 default: 2654 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2655 memcpy(cmd.key, keyconf->key, keyconf->keylen); 2656 } 2657 2658 if (mcast) 2659 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2660 2661 cmd.key_offset = key_offset; 2662 cmd.key_flags = key_flags; 2663 cmd.sta_id = sta_id; 2664 2665 status = ADD_STA_SUCCESS; 2666 if (cmd_flags & CMD_ASYNC) 2667 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, 2668 sizeof(cmd), &cmd); 2669 else 2670 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 2671 &cmd, &status); 2672 2673 switch (status) { 2674 case ADD_STA_SUCCESS: 2675 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2676 break; 2677 default: 2678 ret = -EIO; 2679 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2680 break; 2681 } 2682 2683 return ret; 2684 } 2685 2686 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2687 struct ieee80211_key_conf *keyconf, 2688 u8 sta_id, bool remove_key) 2689 { 2690 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 2691 2692 /* verify the key details match the required command's expectations */ 2693 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 2694 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 2695 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 2696 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 2697 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 2698 return -EINVAL; 2699 2700 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 2701 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 2702 return -EINVAL; 2703 2704 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 2705 igtk_cmd.sta_id = cpu_to_le32(sta_id); 2706 2707 if (remove_key) { 2708 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 2709 } else { 2710 struct ieee80211_key_seq seq; 2711 const u8 *pn; 2712 2713 switch (keyconf->cipher) { 2714 case WLAN_CIPHER_SUITE_AES_CMAC: 2715 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 2716 break; 2717 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 2718 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 2719 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 2720 break; 2721 default: 2722 return -EINVAL; 2723 } 2724 2725 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 2726 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2727 igtk_cmd.ctrl_flags |= 2728 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 2729 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2730 pn = seq.aes_cmac.pn; 2731 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 2732 ((u64) pn[4] << 8) | 2733 ((u64) pn[3] << 16) | 2734 ((u64) pn[2] << 24) | 2735 ((u64) pn[1] << 32) | 2736 ((u64) pn[0] << 40)); 2737 } 2738 2739 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 2740 remove_key ? "removing" : "installing", 2741 igtk_cmd.sta_id); 2742 2743 if (!iwl_mvm_has_new_rx_api(mvm)) { 2744 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 2745 .ctrl_flags = igtk_cmd.ctrl_flags, 2746 .key_id = igtk_cmd.key_id, 2747 .sta_id = igtk_cmd.sta_id, 2748 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 2749 }; 2750 2751 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 2752 ARRAY_SIZE(igtk_cmd_v1.igtk)); 2753 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2754 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 2755 } 2756 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2757 sizeof(igtk_cmd), &igtk_cmd); 2758 } 2759 2760 2761 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 2762 struct ieee80211_vif *vif, 2763 struct ieee80211_sta *sta) 2764 { 2765 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2766 2767 if (sta) 2768 return sta->addr; 2769 2770 if (vif->type == NL80211_IFTYPE_STATION && 2771 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 2772 u8 sta_id = mvmvif->ap_sta_id; 2773 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 2774 lockdep_is_held(&mvm->mutex)); 2775 return sta->addr; 2776 } 2777 2778 2779 return NULL; 2780 } 2781 2782 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 2783 struct ieee80211_vif *vif, 2784 struct ieee80211_sta *sta, 2785 struct ieee80211_key_conf *keyconf, 2786 u8 key_offset, 2787 bool mcast) 2788 { 2789 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2790 int ret; 2791 const u8 *addr; 2792 struct ieee80211_key_seq seq; 2793 u16 p1k[5]; 2794 2795 switch (keyconf->cipher) { 2796 case WLAN_CIPHER_SUITE_TKIP: 2797 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 2798 /* get phase 1 key from mac80211 */ 2799 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2800 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 2801 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2802 seq.tkip.iv32, p1k, 0, key_offset); 2803 break; 2804 case WLAN_CIPHER_SUITE_CCMP: 2805 case WLAN_CIPHER_SUITE_WEP40: 2806 case WLAN_CIPHER_SUITE_WEP104: 2807 case WLAN_CIPHER_SUITE_GCMP: 2808 case WLAN_CIPHER_SUITE_GCMP_256: 2809 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2810 0, NULL, 0, key_offset); 2811 break; 2812 default: 2813 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 2814 0, NULL, 0, key_offset); 2815 } 2816 2817 return ret; 2818 } 2819 2820 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 2821 struct ieee80211_key_conf *keyconf, 2822 bool mcast) 2823 { 2824 struct iwl_mvm_add_sta_key_cmd cmd = {}; 2825 __le16 key_flags; 2826 int ret; 2827 u32 status; 2828 2829 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 2830 STA_KEY_FLG_KEYID_MSK); 2831 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 2832 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 2833 2834 if (mcast) 2835 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2836 2837 cmd.key_flags = key_flags; 2838 cmd.key_offset = keyconf->hw_key_idx; 2839 cmd.sta_id = sta_id; 2840 2841 status = ADD_STA_SUCCESS; 2842 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 2843 &cmd, &status); 2844 2845 switch (status) { 2846 case ADD_STA_SUCCESS: 2847 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 2848 break; 2849 default: 2850 ret = -EIO; 2851 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 2852 break; 2853 } 2854 2855 return ret; 2856 } 2857 2858 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 2859 struct ieee80211_vif *vif, 2860 struct ieee80211_sta *sta, 2861 struct ieee80211_key_conf *keyconf, 2862 u8 key_offset) 2863 { 2864 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 2865 struct iwl_mvm_sta *mvm_sta; 2866 u8 sta_id; 2867 int ret; 2868 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 2869 2870 lockdep_assert_held(&mvm->mutex); 2871 2872 /* Get the station id from the mvm local station table */ 2873 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 2874 if (!mvm_sta) { 2875 IWL_ERR(mvm, "Failed to find station\n"); 2876 return -EINVAL; 2877 } 2878 sta_id = mvm_sta->sta_id; 2879 2880 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 2881 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 2882 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 2883 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 2884 goto end; 2885 } 2886 2887 /* 2888 * It is possible that the 'sta' parameter is NULL, and thus 2889 * there is a need to retrieve the sta from the local station table. 2890 */ 2891 if (!sta) { 2892 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 2893 lockdep_is_held(&mvm->mutex)); 2894 if (IS_ERR_OR_NULL(sta)) { 2895 IWL_ERR(mvm, "Invalid station id\n"); 2896 return -EINVAL; 2897 } 2898 } 2899 2900 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 2901 return -EINVAL; 2902 2903 /* If the key_offset is not pre-assigned, we need to find a 2904 * new offset to use. In normal cases, the offset is not 2905 * pre-assigned, but during HW_RESTART we want to reuse the 2906 * same indices, so we pass them when this function is called. 2907 * 2908 * In D3 entry, we need to hardcoded the indices (because the 2909 * firmware hardcodes the PTK offset to 0). In this case, we 2910 * need to make sure we don't overwrite the hw_key_idx in the 2911 * keyconf structure, because otherwise we cannot configure 2912 * the original ones back when resuming. 2913 */ 2914 if (key_offset == STA_KEY_IDX_INVALID) { 2915 key_offset = iwl_mvm_set_fw_key_idx(mvm); 2916 if (key_offset == STA_KEY_IDX_INVALID) 2917 return -ENOSPC; 2918 keyconf->hw_key_idx = key_offset; 2919 } 2920 2921 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 2922 if (ret) 2923 goto end; 2924 2925 /* 2926 * For WEP, the same key is used for multicast and unicast. Upload it 2927 * again, using the same key offset, and now pointing the other one 2928 * to the same key slot (offset). 2929 * If this fails, remove the original as well. 2930 */ 2931 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 2932 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { 2933 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 2934 key_offset, !mcast); 2935 if (ret) { 2936 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 2937 goto end; 2938 } 2939 } 2940 2941 __set_bit(key_offset, mvm->fw_key_table); 2942 2943 end: 2944 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 2945 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 2946 sta ? sta->addr : zero_addr, ret); 2947 return ret; 2948 } 2949 2950 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 2951 struct ieee80211_vif *vif, 2952 struct ieee80211_sta *sta, 2953 struct ieee80211_key_conf *keyconf) 2954 { 2955 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 2956 struct iwl_mvm_sta *mvm_sta; 2957 u8 sta_id = IWL_MVM_STATION_COUNT; 2958 int ret, i; 2959 2960 lockdep_assert_held(&mvm->mutex); 2961 2962 /* Get the station from the mvm local station table */ 2963 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 2964 2965 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 2966 keyconf->keyidx, sta_id); 2967 2968 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 2969 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 2970 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2971 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 2972 2973 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 2974 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 2975 keyconf->hw_key_idx); 2976 return -ENOENT; 2977 } 2978 2979 /* track which key was deleted last */ 2980 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2981 if (mvm->fw_key_deleted[i] < U8_MAX) 2982 mvm->fw_key_deleted[i]++; 2983 } 2984 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 2985 2986 if (!mvm_sta) { 2987 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 2988 return 0; 2989 } 2990 2991 sta_id = mvm_sta->sta_id; 2992 2993 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 2994 if (ret) 2995 return ret; 2996 2997 /* delete WEP key twice to get rid of (now useless) offset */ 2998 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 2999 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3000 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3001 3002 return ret; 3003 } 3004 3005 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3006 struct ieee80211_vif *vif, 3007 struct ieee80211_key_conf *keyconf, 3008 struct ieee80211_sta *sta, u32 iv32, 3009 u16 *phase1key) 3010 { 3011 struct iwl_mvm_sta *mvm_sta; 3012 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3013 3014 rcu_read_lock(); 3015 3016 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3017 if (WARN_ON_ONCE(!mvm_sta)) 3018 goto unlock; 3019 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 3020 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3021 3022 unlock: 3023 rcu_read_unlock(); 3024 } 3025 3026 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3027 struct ieee80211_sta *sta) 3028 { 3029 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3030 struct iwl_mvm_add_sta_cmd cmd = { 3031 .add_modify = STA_MODE_MODIFY, 3032 .sta_id = mvmsta->sta_id, 3033 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3034 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3035 }; 3036 int ret; 3037 3038 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3039 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3040 if (ret) 3041 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3042 } 3043 3044 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3045 struct ieee80211_sta *sta, 3046 enum ieee80211_frame_release_type reason, 3047 u16 cnt, u16 tids, bool more_data, 3048 bool agg) 3049 { 3050 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3051 struct iwl_mvm_add_sta_cmd cmd = { 3052 .add_modify = STA_MODE_MODIFY, 3053 .sta_id = mvmsta->sta_id, 3054 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3055 .sleep_tx_count = cpu_to_le16(cnt), 3056 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3057 }; 3058 int tid, ret; 3059 unsigned long _tids = tids; 3060 3061 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3062 * Note that this field is reserved and unused by firmware not 3063 * supporting GO uAPSD, so it's safe to always do this. 3064 */ 3065 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3066 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3067 3068 /* If we're releasing frames from aggregation queues then check if the 3069 * all queues combined that we're releasing frames from have 3070 * - more frames than the service period, in which case more_data 3071 * needs to be set 3072 * - fewer than 'cnt' frames, in which case we need to adjust the 3073 * firmware command (but do that unconditionally) 3074 */ 3075 if (agg) { 3076 int remaining = cnt; 3077 int sleep_tx_count; 3078 3079 spin_lock_bh(&mvmsta->lock); 3080 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3081 struct iwl_mvm_tid_data *tid_data; 3082 u16 n_queued; 3083 3084 tid_data = &mvmsta->tid_data[tid]; 3085 if (WARN(tid_data->state != IWL_AGG_ON && 3086 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, 3087 "TID %d state is %d\n", 3088 tid, tid_data->state)) { 3089 spin_unlock_bh(&mvmsta->lock); 3090 ieee80211_sta_eosp(sta); 3091 return; 3092 } 3093 3094 n_queued = iwl_mvm_tid_queued(tid_data); 3095 if (n_queued > remaining) { 3096 more_data = true; 3097 remaining = 0; 3098 break; 3099 } 3100 remaining -= n_queued; 3101 } 3102 sleep_tx_count = cnt - remaining; 3103 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3104 mvmsta->sleep_tx_count = sleep_tx_count; 3105 spin_unlock_bh(&mvmsta->lock); 3106 3107 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3108 if (WARN_ON(cnt - remaining == 0)) { 3109 ieee80211_sta_eosp(sta); 3110 return; 3111 } 3112 } 3113 3114 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3115 if (more_data) 3116 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); 3117 3118 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3119 mvmsta->next_status_eosp = true; 3120 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); 3121 } else { 3122 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); 3123 } 3124 3125 /* block the Tx queues until the FW updated the sleep Tx count */ 3126 iwl_trans_block_txq_ptrs(mvm->trans, true); 3127 3128 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3129 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3130 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3131 if (ret) 3132 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3133 } 3134 3135 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3136 struct iwl_rx_cmd_buffer *rxb) 3137 { 3138 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3139 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3140 struct ieee80211_sta *sta; 3141 u32 sta_id = le32_to_cpu(notif->sta_id); 3142 3143 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3144 return; 3145 3146 rcu_read_lock(); 3147 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3148 if (!IS_ERR_OR_NULL(sta)) 3149 ieee80211_sta_eosp(sta); 3150 rcu_read_unlock(); 3151 } 3152 3153 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3154 struct iwl_mvm_sta *mvmsta, bool disable) 3155 { 3156 struct iwl_mvm_add_sta_cmd cmd = { 3157 .add_modify = STA_MODE_MODIFY, 3158 .sta_id = mvmsta->sta_id, 3159 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3160 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3161 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3162 }; 3163 int ret; 3164 3165 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3166 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3167 if (ret) 3168 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3169 } 3170 3171 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3172 struct ieee80211_sta *sta, 3173 bool disable) 3174 { 3175 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3176 3177 spin_lock_bh(&mvm_sta->lock); 3178 3179 if (mvm_sta->disable_tx == disable) { 3180 spin_unlock_bh(&mvm_sta->lock); 3181 return; 3182 } 3183 3184 mvm_sta->disable_tx = disable; 3185 3186 /* 3187 * Tell mac80211 to start/stop queuing tx for this station, 3188 * but don't stop queuing if there are still pending frames 3189 * for this station. 3190 */ 3191 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) 3192 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3193 3194 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3195 3196 spin_unlock_bh(&mvm_sta->lock); 3197 } 3198 3199 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3200 struct iwl_mvm_vif *mvmvif, 3201 bool disable) 3202 { 3203 struct ieee80211_sta *sta; 3204 struct iwl_mvm_sta *mvm_sta; 3205 int i; 3206 3207 lockdep_assert_held(&mvm->mutex); 3208 3209 /* Block/unblock all the stations of the given mvmvif */ 3210 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { 3211 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3212 lockdep_is_held(&mvm->mutex)); 3213 if (IS_ERR_OR_NULL(sta)) 3214 continue; 3215 3216 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3217 if (mvm_sta->mac_id_n_color != 3218 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3219 continue; 3220 3221 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3222 } 3223 } 3224 3225 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3226 { 3227 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3228 struct iwl_mvm_sta *mvmsta; 3229 3230 rcu_read_lock(); 3231 3232 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3233 3234 if (!WARN_ON(!mvmsta)) 3235 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3236 3237 rcu_read_unlock(); 3238 } 3239