1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 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 - 2017 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 if (iwl_mvm_has_new_rx_api(mvm) || 81 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 82 return sizeof(struct iwl_mvm_add_sta_cmd); 83 else 84 return sizeof(struct iwl_mvm_add_sta_cmd_v7); 85 } 86 87 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 88 enum nl80211_iftype iftype) 89 { 90 int sta_id; 91 u32 reserved_ids = 0; 92 93 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 94 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 95 96 lockdep_assert_held(&mvm->mutex); 97 98 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 99 if (iftype != NL80211_IFTYPE_STATION) 100 reserved_ids = BIT(0); 101 102 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 103 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) { 104 if (BIT(sta_id) & reserved_ids) 105 continue; 106 107 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 108 lockdep_is_held(&mvm->mutex))) 109 return sta_id; 110 } 111 return IWL_MVM_INVALID_STA; 112 } 113 114 /* send station add/update command to firmware */ 115 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 116 bool update, unsigned int flags) 117 { 118 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 119 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 120 .sta_id = mvm_sta->sta_id, 121 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 122 .add_modify = update ? 1 : 0, 123 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 124 STA_FLG_MIMO_EN_MSK), 125 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 126 }; 127 int ret; 128 u32 status; 129 u32 agg_size = 0, mpdu_dens = 0; 130 131 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 132 add_sta_cmd.station_type = mvm_sta->sta_type; 133 134 if (!update || (flags & STA_MODIFY_QUEUES)) { 135 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 136 137 if (!iwl_mvm_has_new_tx_api(mvm)) { 138 add_sta_cmd.tfd_queue_msk = 139 cpu_to_le32(mvm_sta->tfd_queue_msk); 140 141 if (flags & STA_MODIFY_QUEUES) 142 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 143 } else { 144 WARN_ON(flags & STA_MODIFY_QUEUES); 145 } 146 } 147 148 switch (sta->bandwidth) { 149 case IEEE80211_STA_RX_BW_160: 150 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 151 /* fall through */ 152 case IEEE80211_STA_RX_BW_80: 153 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 154 /* fall through */ 155 case IEEE80211_STA_RX_BW_40: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 157 /* fall through */ 158 case IEEE80211_STA_RX_BW_20: 159 if (sta->ht_cap.ht_supported) 160 add_sta_cmd.station_flags |= 161 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 162 break; 163 } 164 165 switch (sta->rx_nss) { 166 case 1: 167 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 168 break; 169 case 2: 170 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 171 break; 172 case 3 ... 8: 173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 174 break; 175 } 176 177 switch (sta->smps_mode) { 178 case IEEE80211_SMPS_AUTOMATIC: 179 case IEEE80211_SMPS_NUM_MODES: 180 WARN_ON(1); 181 break; 182 case IEEE80211_SMPS_STATIC: 183 /* override NSS */ 184 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 186 break; 187 case IEEE80211_SMPS_DYNAMIC: 188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 189 break; 190 case IEEE80211_SMPS_OFF: 191 /* nothing */ 192 break; 193 } 194 195 if (sta->ht_cap.ht_supported) { 196 add_sta_cmd.station_flags_msk |= 197 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 198 STA_FLG_AGG_MPDU_DENS_MSK); 199 200 mpdu_dens = sta->ht_cap.ampdu_density; 201 } 202 203 if (sta->vht_cap.vht_supported) { 204 agg_size = sta->vht_cap.cap & 205 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 206 agg_size >>= 207 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 208 } else if (sta->ht_cap.ht_supported) { 209 agg_size = sta->ht_cap.ampdu_factor; 210 } 211 212 add_sta_cmd.station_flags |= 213 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 214 add_sta_cmd.station_flags |= 215 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 216 if (mvm_sta->associated) 217 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 218 219 if (sta->wme) { 220 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 221 222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 223 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 225 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 226 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 227 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 229 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 230 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 231 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 232 } 233 234 status = ADD_STA_SUCCESS; 235 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 236 iwl_mvm_add_sta_cmd_size(mvm), 237 &add_sta_cmd, &status); 238 if (ret) 239 return ret; 240 241 switch (status & IWL_ADD_STA_STATUS_MASK) { 242 case ADD_STA_SUCCESS: 243 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 244 break; 245 default: 246 ret = -EIO; 247 IWL_ERR(mvm, "ADD_STA failed\n"); 248 break; 249 } 250 251 return ret; 252 } 253 254 static void iwl_mvm_rx_agg_session_expired(unsigned long data) 255 { 256 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data; 257 struct iwl_mvm_baid_data *ba_data; 258 struct ieee80211_sta *sta; 259 struct iwl_mvm_sta *mvm_sta; 260 unsigned long timeout; 261 262 rcu_read_lock(); 263 264 ba_data = rcu_dereference(*rcu_ptr); 265 266 if (WARN_ON(!ba_data)) 267 goto unlock; 268 269 if (!ba_data->timeout) 270 goto unlock; 271 272 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 273 if (time_is_after_jiffies(timeout)) { 274 mod_timer(&ba_data->session_timer, timeout); 275 goto unlock; 276 } 277 278 /* Timer expired */ 279 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 280 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 281 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif, 282 sta->addr, ba_data->tid); 283 unlock: 284 rcu_read_unlock(); 285 } 286 287 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, 288 struct ieee80211_sta *sta) 289 { 290 unsigned long used_hw_queues; 291 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 292 unsigned int wdg_timeout = 293 iwl_mvm_get_wd_timeout(mvm, NULL, true, false); 294 u32 ac; 295 296 lockdep_assert_held(&mvm->mutex); 297 298 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); 299 300 /* Find available queues, and allocate them to the ACs */ 301 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 302 u8 queue = find_first_zero_bit(&used_hw_queues, 303 mvm->first_agg_queue); 304 305 if (queue >= mvm->first_agg_queue) { 306 IWL_ERR(mvm, "Failed to allocate STA queue\n"); 307 return -EBUSY; 308 } 309 310 __set_bit(queue, &used_hw_queues); 311 mvmsta->hw_queue[ac] = queue; 312 } 313 314 /* Found a place for all queues - enable them */ 315 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 316 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], 317 mvmsta->hw_queue[ac], 318 iwl_mvm_ac_to_tx_fifo[ac], 0, 319 wdg_timeout); 320 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); 321 } 322 323 return 0; 324 } 325 326 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, 327 struct ieee80211_sta *sta) 328 { 329 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 330 unsigned long sta_msk; 331 int i; 332 333 lockdep_assert_held(&mvm->mutex); 334 335 /* disable the TDLS STA-specific queues */ 336 sta_msk = mvmsta->tfd_queue_msk; 337 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) 338 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); 339 } 340 341 /* Disable aggregations for a bitmap of TIDs for a given station */ 342 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 343 unsigned long disable_agg_tids, 344 bool remove_queue) 345 { 346 struct iwl_mvm_add_sta_cmd cmd = {}; 347 struct ieee80211_sta *sta; 348 struct iwl_mvm_sta *mvmsta; 349 u32 status; 350 u8 sta_id; 351 int ret; 352 353 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 354 return -EINVAL; 355 356 spin_lock_bh(&mvm->queue_info_lock); 357 sta_id = mvm->queue_info[queue].ra_sta_id; 358 spin_unlock_bh(&mvm->queue_info_lock); 359 360 rcu_read_lock(); 361 362 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 363 364 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 365 rcu_read_unlock(); 366 return -EINVAL; 367 } 368 369 mvmsta = iwl_mvm_sta_from_mac80211(sta); 370 371 mvmsta->tid_disable_agg |= disable_agg_tids; 372 373 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 374 cmd.sta_id = mvmsta->sta_id; 375 cmd.add_modify = STA_MODE_MODIFY; 376 cmd.modify_mask = STA_MODIFY_QUEUES; 377 if (disable_agg_tids) 378 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 379 if (remove_queue) 380 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 381 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 382 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 383 384 rcu_read_unlock(); 385 386 /* Notify FW of queue removal from the STA queues */ 387 status = ADD_STA_SUCCESS; 388 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 389 iwl_mvm_add_sta_cmd_size(mvm), 390 &cmd, &status); 391 392 return ret; 393 } 394 395 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 396 { 397 struct ieee80211_sta *sta; 398 struct iwl_mvm_sta *mvmsta; 399 unsigned long tid_bitmap; 400 unsigned long agg_tids = 0; 401 u8 sta_id; 402 int tid; 403 404 lockdep_assert_held(&mvm->mutex); 405 406 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 407 return -EINVAL; 408 409 spin_lock_bh(&mvm->queue_info_lock); 410 sta_id = mvm->queue_info[queue].ra_sta_id; 411 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 412 spin_unlock_bh(&mvm->queue_info_lock); 413 414 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 415 lockdep_is_held(&mvm->mutex)); 416 417 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 418 return -EINVAL; 419 420 mvmsta = iwl_mvm_sta_from_mac80211(sta); 421 422 spin_lock_bh(&mvmsta->lock); 423 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 424 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 425 agg_tids |= BIT(tid); 426 } 427 spin_unlock_bh(&mvmsta->lock); 428 429 return agg_tids; 430 } 431 432 /* 433 * Remove a queue from a station's resources. 434 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 435 * doesn't disable the queue 436 */ 437 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 438 { 439 struct ieee80211_sta *sta; 440 struct iwl_mvm_sta *mvmsta; 441 unsigned long tid_bitmap; 442 unsigned long disable_agg_tids = 0; 443 u8 sta_id; 444 int tid; 445 446 lockdep_assert_held(&mvm->mutex); 447 448 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 449 return -EINVAL; 450 451 spin_lock_bh(&mvm->queue_info_lock); 452 sta_id = mvm->queue_info[queue].ra_sta_id; 453 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 454 spin_unlock_bh(&mvm->queue_info_lock); 455 456 rcu_read_lock(); 457 458 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 459 460 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 461 rcu_read_unlock(); 462 return 0; 463 } 464 465 mvmsta = iwl_mvm_sta_from_mac80211(sta); 466 467 spin_lock_bh(&mvmsta->lock); 468 /* Unmap MAC queues and TIDs from this queue */ 469 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 470 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 471 disable_agg_tids |= BIT(tid); 472 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 473 } 474 475 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 476 spin_unlock_bh(&mvmsta->lock); 477 478 rcu_read_unlock(); 479 480 return disable_agg_tids; 481 } 482 483 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 484 bool same_sta) 485 { 486 struct iwl_mvm_sta *mvmsta; 487 u8 txq_curr_ac, sta_id, tid; 488 unsigned long disable_agg_tids = 0; 489 int ret; 490 491 lockdep_assert_held(&mvm->mutex); 492 493 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 494 return -EINVAL; 495 496 spin_lock_bh(&mvm->queue_info_lock); 497 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 498 sta_id = mvm->queue_info[queue].ra_sta_id; 499 tid = mvm->queue_info[queue].txq_tid; 500 spin_unlock_bh(&mvm->queue_info_lock); 501 502 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 503 if (WARN_ON(!mvmsta)) 504 return -EINVAL; 505 506 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 507 /* Disable the queue */ 508 if (disable_agg_tids) 509 iwl_mvm_invalidate_sta_queue(mvm, queue, 510 disable_agg_tids, false); 511 512 ret = iwl_mvm_disable_txq(mvm, queue, 513 mvmsta->vif->hw_queue[txq_curr_ac], 514 tid, 0); 515 if (ret) { 516 /* Re-mark the inactive queue as inactive */ 517 spin_lock_bh(&mvm->queue_info_lock); 518 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 519 spin_unlock_bh(&mvm->queue_info_lock); 520 IWL_ERR(mvm, 521 "Failed to free inactive queue %d (ret=%d)\n", 522 queue, ret); 523 524 return ret; 525 } 526 527 /* If TXQ is allocated to another STA, update removal in FW */ 528 if (!same_sta) 529 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 530 531 return 0; 532 } 533 534 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 535 unsigned long tfd_queue_mask, u8 ac) 536 { 537 int queue = 0; 538 u8 ac_to_queue[IEEE80211_NUM_ACS]; 539 int i; 540 541 lockdep_assert_held(&mvm->queue_info_lock); 542 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 543 return -EINVAL; 544 545 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 546 547 /* See what ACs the existing queues for this STA have */ 548 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 549 /* Only DATA queues can be shared */ 550 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 551 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 552 continue; 553 554 /* Don't try and take queues being reconfigured */ 555 if (mvm->queue_info[queue].status == 556 IWL_MVM_QUEUE_RECONFIGURING) 557 continue; 558 559 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 560 } 561 562 /* 563 * The queue to share is chosen only from DATA queues as follows (in 564 * descending priority): 565 * 1. An AC_BE queue 566 * 2. Same AC queue 567 * 3. Highest AC queue that is lower than new AC 568 * 4. Any existing AC (there always is at least 1 DATA queue) 569 */ 570 571 /* Priority 1: An AC_BE queue */ 572 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 573 queue = ac_to_queue[IEEE80211_AC_BE]; 574 /* Priority 2: Same AC queue */ 575 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 576 queue = ac_to_queue[ac]; 577 /* Priority 3a: If new AC is VO and VI exists - use VI */ 578 else if (ac == IEEE80211_AC_VO && 579 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 580 queue = ac_to_queue[IEEE80211_AC_VI]; 581 /* Priority 3b: No BE so only AC less than the new one is BK */ 582 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 583 queue = ac_to_queue[IEEE80211_AC_BK]; 584 /* Priority 4a: No BE nor BK - use VI if exists */ 585 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 586 queue = ac_to_queue[IEEE80211_AC_VI]; 587 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 588 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 589 queue = ac_to_queue[IEEE80211_AC_VO]; 590 591 /* Make sure queue found (or not) is legal */ 592 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 593 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 594 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 595 IWL_ERR(mvm, "No DATA queues available to share\n"); 596 return -ENOSPC; 597 } 598 599 /* Make sure the queue isn't in the middle of being reconfigured */ 600 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 601 IWL_ERR(mvm, 602 "TXQ %d is in the middle of re-config - try again\n", 603 queue); 604 return -EBUSY; 605 } 606 607 return queue; 608 } 609 610 /* 611 * If a given queue has a higher AC than the TID stream that is being compared 612 * to, the queue needs to be redirected to the lower AC. This function does that 613 * in such a case, otherwise - if no redirection required - it does nothing, 614 * unless the %force param is true. 615 */ 616 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 617 int ac, int ssn, unsigned int wdg_timeout, 618 bool force) 619 { 620 struct iwl_scd_txq_cfg_cmd cmd = { 621 .scd_queue = queue, 622 .action = SCD_CFG_DISABLE_QUEUE, 623 }; 624 bool shared_queue; 625 unsigned long mq; 626 int ret; 627 628 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 629 return -EINVAL; 630 631 /* 632 * If the AC is lower than current one - FIFO needs to be redirected to 633 * the lowest one of the streams in the queue. Check if this is needed 634 * here. 635 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 636 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 637 * we need to check if the numerical value of X is LARGER than of Y. 638 */ 639 spin_lock_bh(&mvm->queue_info_lock); 640 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 641 spin_unlock_bh(&mvm->queue_info_lock); 642 643 IWL_DEBUG_TX_QUEUES(mvm, 644 "No redirection needed on TXQ #%d\n", 645 queue); 646 return 0; 647 } 648 649 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 650 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 651 cmd.tid = mvm->queue_info[queue].txq_tid; 652 mq = mvm->hw_queue_to_mac80211[queue]; 653 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 654 spin_unlock_bh(&mvm->queue_info_lock); 655 656 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 657 queue, iwl_mvm_ac_to_tx_fifo[ac]); 658 659 /* Stop MAC queues and wait for this queue to empty */ 660 iwl_mvm_stop_mac_queues(mvm, mq); 661 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 662 if (ret) { 663 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 664 queue); 665 ret = -EIO; 666 goto out; 667 } 668 669 /* Before redirecting the queue we need to de-activate it */ 670 iwl_trans_txq_disable(mvm->trans, queue, false); 671 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 672 if (ret) 673 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 674 ret); 675 676 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 677 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 678 679 /* Update the TID "owner" of the queue */ 680 spin_lock_bh(&mvm->queue_info_lock); 681 mvm->queue_info[queue].txq_tid = tid; 682 spin_unlock_bh(&mvm->queue_info_lock); 683 684 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 685 686 /* Redirect to lower AC */ 687 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 688 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, 689 ssn); 690 691 /* Update AC marking of the queue */ 692 spin_lock_bh(&mvm->queue_info_lock); 693 mvm->queue_info[queue].mac80211_ac = ac; 694 spin_unlock_bh(&mvm->queue_info_lock); 695 696 /* 697 * Mark queue as shared in transport if shared 698 * Note this has to be done after queue enablement because enablement 699 * can also set this value, and there is no indication there to shared 700 * queues 701 */ 702 if (shared_queue) 703 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 704 705 out: 706 /* Continue using the MAC queues */ 707 iwl_mvm_start_mac_queues(mvm, mq); 708 709 return ret; 710 } 711 712 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 713 struct ieee80211_sta *sta, u8 ac, 714 int tid) 715 { 716 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 717 unsigned int wdg_timeout = 718 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 719 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 720 int queue = -1; 721 722 lockdep_assert_held(&mvm->mutex); 723 724 IWL_DEBUG_TX_QUEUES(mvm, 725 "Allocating queue for sta %d on tid %d\n", 726 mvmsta->sta_id, tid); 727 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid, 728 wdg_timeout); 729 if (queue < 0) 730 return queue; 731 732 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 733 734 spin_lock_bh(&mvmsta->lock); 735 mvmsta->tid_data[tid].txq_id = queue; 736 mvmsta->tid_data[tid].is_tid_active = true; 737 spin_unlock_bh(&mvmsta->lock); 738 739 return 0; 740 } 741 742 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 743 struct ieee80211_sta *sta, u8 ac, int tid, 744 struct ieee80211_hdr *hdr) 745 { 746 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 747 struct iwl_trans_txq_scd_cfg cfg = { 748 .fifo = iwl_mvm_ac_to_tx_fifo[ac], 749 .sta_id = mvmsta->sta_id, 750 .tid = tid, 751 .frame_limit = IWL_FRAME_LIMIT, 752 }; 753 unsigned int wdg_timeout = 754 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 755 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 756 int queue = -1; 757 bool using_inactive_queue = false, same_sta = false; 758 unsigned long disable_agg_tids = 0; 759 enum iwl_mvm_agg_state queue_state; 760 bool shared_queue = false, inc_ssn; 761 int ssn; 762 unsigned long tfd_queue_mask; 763 int ret; 764 765 lockdep_assert_held(&mvm->mutex); 766 767 if (iwl_mvm_has_new_tx_api(mvm)) 768 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 769 770 spin_lock_bh(&mvmsta->lock); 771 tfd_queue_mask = mvmsta->tfd_queue_msk; 772 spin_unlock_bh(&mvmsta->lock); 773 774 spin_lock_bh(&mvm->queue_info_lock); 775 776 /* 777 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 778 * exists 779 */ 780 if (!ieee80211_is_data_qos(hdr->frame_control) || 781 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 782 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 783 IWL_MVM_DQA_MIN_MGMT_QUEUE, 784 IWL_MVM_DQA_MAX_MGMT_QUEUE); 785 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 786 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 787 queue); 788 789 /* If no such queue is found, we'll use a DATA queue instead */ 790 } 791 792 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 793 (mvm->queue_info[mvmsta->reserved_queue].status == 794 IWL_MVM_QUEUE_RESERVED || 795 mvm->queue_info[mvmsta->reserved_queue].status == 796 IWL_MVM_QUEUE_INACTIVE)) { 797 queue = mvmsta->reserved_queue; 798 mvm->queue_info[queue].reserved = true; 799 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 800 } 801 802 if (queue < 0) 803 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 804 IWL_MVM_DQA_MIN_DATA_QUEUE, 805 IWL_MVM_DQA_MAX_DATA_QUEUE); 806 807 /* 808 * Check if this queue is already allocated but inactive. 809 * In such a case, we'll need to first free this queue before enabling 810 * it again, so we'll mark it as reserved to make sure no new traffic 811 * arrives on it 812 */ 813 if (queue > 0 && 814 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 815 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 816 using_inactive_queue = true; 817 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 818 IWL_DEBUG_TX_QUEUES(mvm, 819 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 820 queue, mvmsta->sta_id, tid); 821 } 822 823 /* No free queue - we'll have to share */ 824 if (queue <= 0) { 825 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 826 if (queue > 0) { 827 shared_queue = true; 828 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 829 } 830 } 831 832 /* 833 * Mark TXQ as ready, even though it hasn't been fully configured yet, 834 * to make sure no one else takes it. 835 * This will allow avoiding re-acquiring the lock at the end of the 836 * configuration. On error we'll mark it back as free. 837 */ 838 if ((queue > 0) && !shared_queue) 839 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 840 841 spin_unlock_bh(&mvm->queue_info_lock); 842 843 /* This shouldn't happen - out of queues */ 844 if (WARN_ON(queue <= 0)) { 845 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 846 tid, cfg.sta_id); 847 return queue; 848 } 849 850 /* 851 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 852 * but for configuring the SCD to send A-MPDUs we need to mark the queue 853 * as aggregatable. 854 * Mark all DATA queues as allowing to be aggregated at some point 855 */ 856 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 857 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 858 859 /* 860 * If this queue was previously inactive (idle) - we need to free it 861 * first 862 */ 863 if (using_inactive_queue) { 864 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 865 if (ret) 866 return ret; 867 } 868 869 IWL_DEBUG_TX_QUEUES(mvm, 870 "Allocating %squeue #%d to sta %d on tid %d\n", 871 shared_queue ? "shared " : "", queue, 872 mvmsta->sta_id, tid); 873 874 if (shared_queue) { 875 /* Disable any open aggs on this queue */ 876 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 877 878 if (disable_agg_tids) { 879 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 880 queue); 881 iwl_mvm_invalidate_sta_queue(mvm, queue, 882 disable_agg_tids, false); 883 } 884 } 885 886 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 887 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue, 888 ssn, &cfg, wdg_timeout); 889 if (inc_ssn) { 890 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 891 le16_add_cpu(&hdr->seq_ctrl, 0x10); 892 } 893 894 /* 895 * Mark queue as shared in transport if shared 896 * Note this has to be done after queue enablement because enablement 897 * can also set this value, and there is no indication there to shared 898 * queues 899 */ 900 if (shared_queue) 901 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 902 903 spin_lock_bh(&mvmsta->lock); 904 /* 905 * This looks racy, but it is not. We have only one packet for 906 * this ra/tid in our Tx path since we stop the Qdisc when we 907 * need to allocate a new TFD queue. 908 */ 909 if (inc_ssn) 910 mvmsta->tid_data[tid].seq_number += 0x10; 911 mvmsta->tid_data[tid].txq_id = queue; 912 mvmsta->tid_data[tid].is_tid_active = true; 913 mvmsta->tfd_queue_msk |= BIT(queue); 914 queue_state = mvmsta->tid_data[tid].state; 915 916 if (mvmsta->reserved_queue == queue) 917 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 918 spin_unlock_bh(&mvmsta->lock); 919 920 if (!shared_queue) { 921 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 922 if (ret) 923 goto out_err; 924 925 /* If we need to re-enable aggregations... */ 926 if (queue_state == IWL_AGG_ON) { 927 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 928 if (ret) 929 goto out_err; 930 } 931 } else { 932 /* Redirect queue, if needed */ 933 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 934 wdg_timeout, false); 935 if (ret) 936 goto out_err; 937 } 938 939 return 0; 940 941 out_err: 942 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 943 944 return ret; 945 } 946 947 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 948 { 949 struct iwl_scd_txq_cfg_cmd cmd = { 950 .scd_queue = queue, 951 .action = SCD_CFG_UPDATE_QUEUE_TID, 952 }; 953 int tid; 954 unsigned long tid_bitmap; 955 int ret; 956 957 lockdep_assert_held(&mvm->mutex); 958 959 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 960 return; 961 962 spin_lock_bh(&mvm->queue_info_lock); 963 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 964 spin_unlock_bh(&mvm->queue_info_lock); 965 966 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 967 return; 968 969 /* Find any TID for queue */ 970 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 971 cmd.tid = tid; 972 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 973 974 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 975 if (ret) { 976 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 977 queue, ret); 978 return; 979 } 980 981 spin_lock_bh(&mvm->queue_info_lock); 982 mvm->queue_info[queue].txq_tid = tid; 983 spin_unlock_bh(&mvm->queue_info_lock); 984 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 985 queue, tid); 986 } 987 988 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 989 { 990 struct ieee80211_sta *sta; 991 struct iwl_mvm_sta *mvmsta; 992 u8 sta_id; 993 int tid = -1; 994 unsigned long tid_bitmap; 995 unsigned int wdg_timeout; 996 int ssn; 997 int ret = true; 998 999 /* queue sharing is disabled on new TX path */ 1000 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1001 return; 1002 1003 lockdep_assert_held(&mvm->mutex); 1004 1005 spin_lock_bh(&mvm->queue_info_lock); 1006 sta_id = mvm->queue_info[queue].ra_sta_id; 1007 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1008 spin_unlock_bh(&mvm->queue_info_lock); 1009 1010 /* Find TID for queue, and make sure it is the only one on the queue */ 1011 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1012 if (tid_bitmap != BIT(tid)) { 1013 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 1014 queue, tid_bitmap); 1015 return; 1016 } 1017 1018 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 1019 tid); 1020 1021 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1022 lockdep_is_held(&mvm->mutex)); 1023 1024 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1025 return; 1026 1027 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1028 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1029 1030 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1031 1032 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 1033 tid_to_mac80211_ac[tid], ssn, 1034 wdg_timeout, true); 1035 if (ret) { 1036 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 1037 return; 1038 } 1039 1040 /* If aggs should be turned back on - do it */ 1041 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1042 struct iwl_mvm_add_sta_cmd cmd = {0}; 1043 1044 mvmsta->tid_disable_agg &= ~BIT(tid); 1045 1046 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1047 cmd.sta_id = mvmsta->sta_id; 1048 cmd.add_modify = STA_MODE_MODIFY; 1049 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1050 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1051 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1052 1053 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1054 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1055 if (!ret) { 1056 IWL_DEBUG_TX_QUEUES(mvm, 1057 "TXQ #%d is now aggregated again\n", 1058 queue); 1059 1060 /* Mark queue intenally as aggregating again */ 1061 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1062 } 1063 } 1064 1065 spin_lock_bh(&mvm->queue_info_lock); 1066 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1067 spin_unlock_bh(&mvm->queue_info_lock); 1068 } 1069 1070 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1071 { 1072 if (tid == IWL_MAX_TID_COUNT) 1073 return IEEE80211_AC_VO; /* MGMT */ 1074 1075 return tid_to_mac80211_ac[tid]; 1076 } 1077 1078 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 1079 struct ieee80211_sta *sta, int tid) 1080 { 1081 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1082 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1083 struct sk_buff *skb; 1084 struct ieee80211_hdr *hdr; 1085 struct sk_buff_head deferred_tx; 1086 u8 mac_queue; 1087 bool no_queue = false; /* Marks if there is a problem with the queue */ 1088 u8 ac; 1089 1090 lockdep_assert_held(&mvm->mutex); 1091 1092 skb = skb_peek(&tid_data->deferred_tx_frames); 1093 if (!skb) 1094 return; 1095 hdr = (void *)skb->data; 1096 1097 ac = iwl_mvm_tid_to_ac_queue(tid); 1098 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1099 1100 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE && 1101 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1102 IWL_ERR(mvm, 1103 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1104 mvmsta->sta_id, tid); 1105 1106 /* 1107 * Mark queue as problematic so later the deferred traffic is 1108 * freed, as we can do nothing with it 1109 */ 1110 no_queue = true; 1111 } 1112 1113 __skb_queue_head_init(&deferred_tx); 1114 1115 /* Disable bottom-halves when entering TX path */ 1116 local_bh_disable(); 1117 spin_lock(&mvmsta->lock); 1118 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1119 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1120 spin_unlock(&mvmsta->lock); 1121 1122 while ((skb = __skb_dequeue(&deferred_tx))) 1123 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1124 ieee80211_free_txskb(mvm->hw, skb); 1125 local_bh_enable(); 1126 1127 /* Wake queue */ 1128 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1129 } 1130 1131 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1132 { 1133 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1134 add_stream_wk); 1135 struct ieee80211_sta *sta; 1136 struct iwl_mvm_sta *mvmsta; 1137 unsigned long deferred_tid_traffic; 1138 int queue, sta_id, tid; 1139 1140 /* Check inactivity of queues */ 1141 iwl_mvm_inactivity_check(mvm); 1142 1143 mutex_lock(&mvm->mutex); 1144 1145 /* No queue reconfiguration in TVQM mode */ 1146 if (iwl_mvm_has_new_tx_api(mvm)) 1147 goto alloc_queues; 1148 1149 /* Reconfigure queues requiring reconfiguation */ 1150 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) { 1151 bool reconfig; 1152 bool change_owner; 1153 1154 spin_lock_bh(&mvm->queue_info_lock); 1155 reconfig = (mvm->queue_info[queue].status == 1156 IWL_MVM_QUEUE_RECONFIGURING); 1157 1158 /* 1159 * We need to take into account a situation in which a TXQ was 1160 * allocated to TID x, and then turned shared by adding TIDs y 1161 * and z. If TID x becomes inactive and is removed from the TXQ, 1162 * ownership must be given to one of the remaining TIDs. 1163 * This is mainly because if TID x continues - a new queue can't 1164 * be allocated for it as long as it is an owner of another TXQ. 1165 */ 1166 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1167 BIT(mvm->queue_info[queue].txq_tid)) && 1168 (mvm->queue_info[queue].status == 1169 IWL_MVM_QUEUE_SHARED); 1170 spin_unlock_bh(&mvm->queue_info_lock); 1171 1172 if (reconfig) 1173 iwl_mvm_unshare_queue(mvm, queue); 1174 else if (change_owner) 1175 iwl_mvm_change_queue_owner(mvm, queue); 1176 } 1177 1178 alloc_queues: 1179 /* Go over all stations with deferred traffic */ 1180 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1181 IWL_MVM_STATION_COUNT) { 1182 clear_bit(sta_id, mvm->sta_deferred_frames); 1183 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1184 lockdep_is_held(&mvm->mutex)); 1185 if (IS_ERR_OR_NULL(sta)) 1186 continue; 1187 1188 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1189 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1190 1191 for_each_set_bit(tid, &deferred_tid_traffic, 1192 IWL_MAX_TID_COUNT + 1) 1193 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1194 } 1195 1196 mutex_unlock(&mvm->mutex); 1197 } 1198 1199 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1200 struct ieee80211_sta *sta, 1201 enum nl80211_iftype vif_type) 1202 { 1203 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1204 int queue; 1205 bool using_inactive_queue = false, same_sta = false; 1206 1207 /* queue reserving is disabled on new TX path */ 1208 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1209 return 0; 1210 1211 /* 1212 * Check for inactive queues, so we don't reach a situation where we 1213 * can't add a STA due to a shortage in queues that doesn't really exist 1214 */ 1215 iwl_mvm_inactivity_check(mvm); 1216 1217 spin_lock_bh(&mvm->queue_info_lock); 1218 1219 /* Make sure we have free resources for this STA */ 1220 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1221 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1222 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1223 IWL_MVM_QUEUE_FREE)) 1224 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1225 else 1226 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1227 IWL_MVM_DQA_MIN_DATA_QUEUE, 1228 IWL_MVM_DQA_MAX_DATA_QUEUE); 1229 if (queue < 0) { 1230 spin_unlock_bh(&mvm->queue_info_lock); 1231 IWL_ERR(mvm, "No available queues for new station\n"); 1232 return -ENOSPC; 1233 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 1234 /* 1235 * If this queue is already allocated but inactive we'll need to 1236 * first free this queue before enabling it again, we'll mark 1237 * it as reserved to make sure no new traffic arrives on it 1238 */ 1239 using_inactive_queue = true; 1240 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 1241 } 1242 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1243 1244 spin_unlock_bh(&mvm->queue_info_lock); 1245 1246 mvmsta->reserved_queue = queue; 1247 1248 if (using_inactive_queue) 1249 iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 1250 1251 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1252 queue, mvmsta->sta_id); 1253 1254 return 0; 1255 } 1256 1257 /* 1258 * In DQA mode, after a HW restart the queues should be allocated as before, in 1259 * order to avoid race conditions when there are shared queues. This function 1260 * does the re-mapping and queue allocation. 1261 * 1262 * Note that re-enabling aggregations isn't done in this function. 1263 */ 1264 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1265 struct iwl_mvm_sta *mvm_sta) 1266 { 1267 unsigned int wdg_timeout = 1268 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1269 int i; 1270 struct iwl_trans_txq_scd_cfg cfg = { 1271 .sta_id = mvm_sta->sta_id, 1272 .frame_limit = IWL_FRAME_LIMIT, 1273 }; 1274 1275 /* Make sure reserved queue is still marked as such (if allocated) */ 1276 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1277 mvm->queue_info[mvm_sta->reserved_queue].status = 1278 IWL_MVM_QUEUE_RESERVED; 1279 1280 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1281 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1282 int txq_id = tid_data->txq_id; 1283 int ac; 1284 u8 mac_queue; 1285 1286 if (txq_id == IWL_MVM_INVALID_QUEUE) 1287 continue; 1288 1289 skb_queue_head_init(&tid_data->deferred_tx_frames); 1290 1291 ac = tid_to_mac80211_ac[i]; 1292 mac_queue = mvm_sta->vif->hw_queue[ac]; 1293 1294 if (iwl_mvm_has_new_tx_api(mvm)) { 1295 IWL_DEBUG_TX_QUEUES(mvm, 1296 "Re-mapping sta %d tid %d\n", 1297 mvm_sta->sta_id, i); 1298 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, 1299 mvm_sta->sta_id, 1300 i, wdg_timeout); 1301 tid_data->txq_id = txq_id; 1302 } else { 1303 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1304 1305 cfg.tid = i; 1306 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac]; 1307 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1308 txq_id == 1309 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1310 1311 IWL_DEBUG_TX_QUEUES(mvm, 1312 "Re-mapping sta %d tid %d to queue %d\n", 1313 mvm_sta->sta_id, i, txq_id); 1314 1315 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg, 1316 wdg_timeout); 1317 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1318 } 1319 } 1320 1321 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0); 1322 } 1323 1324 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1325 struct ieee80211_vif *vif, 1326 struct ieee80211_sta *sta) 1327 { 1328 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1329 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1330 struct iwl_mvm_rxq_dup_data *dup_data; 1331 int i, ret, sta_id; 1332 1333 lockdep_assert_held(&mvm->mutex); 1334 1335 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1336 sta_id = iwl_mvm_find_free_sta_id(mvm, 1337 ieee80211_vif_type_p2p(vif)); 1338 else 1339 sta_id = mvm_sta->sta_id; 1340 1341 if (sta_id == IWL_MVM_INVALID_STA) 1342 return -ENOSPC; 1343 1344 spin_lock_init(&mvm_sta->lock); 1345 1346 /* In DQA mode, if this is a HW restart, re-alloc existing queues */ 1347 if (iwl_mvm_is_dqa_supported(mvm) && 1348 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1349 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1350 goto update_fw; 1351 } 1352 1353 mvm_sta->sta_id = sta_id; 1354 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1355 mvmvif->color); 1356 mvm_sta->vif = vif; 1357 if (!mvm->trans->cfg->gen2) 1358 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1359 else 1360 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1361 mvm_sta->tx_protection = 0; 1362 mvm_sta->tt_tx_protection = false; 1363 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1364 1365 /* HW restart, don't assume the memory has been zeroed */ 1366 atomic_set(&mvm->pending_frames[sta_id], 0); 1367 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1368 mvm_sta->tfd_queue_msk = 0; 1369 1370 /* 1371 * Allocate new queues for a TDLS station, unless we're in DQA mode, 1372 * and then they'll be allocated dynamically 1373 */ 1374 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) { 1375 ret = iwl_mvm_tdls_sta_init(mvm, sta); 1376 if (ret) 1377 return ret; 1378 } else if (!iwl_mvm_is_dqa_supported(mvm)) { 1379 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1380 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 1381 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); 1382 } 1383 1384 /* for HW restart - reset everything but the sequence number */ 1385 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1386 u16 seq = mvm_sta->tid_data[i].seq_number; 1387 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1388 mvm_sta->tid_data[i].seq_number = seq; 1389 1390 if (!iwl_mvm_is_dqa_supported(mvm)) 1391 continue; 1392 1393 /* 1394 * Mark all queues for this STA as unallocated and defer TX 1395 * frames until the queue is allocated 1396 */ 1397 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1398 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1399 } 1400 mvm_sta->deferred_traffic_tid_map = 0; 1401 mvm_sta->agg_tids = 0; 1402 1403 if (iwl_mvm_has_new_rx_api(mvm) && 1404 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1405 int q; 1406 1407 dup_data = kcalloc(mvm->trans->num_rx_queues, 1408 sizeof(*dup_data), GFP_KERNEL); 1409 if (!dup_data) 1410 return -ENOMEM; 1411 /* 1412 * Initialize all the last_seq values to 0xffff which can never 1413 * compare equal to the frame's seq_ctrl in the check in 1414 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1415 * number and fragmented packets don't reach that function. 1416 * 1417 * This thus allows receiving a packet with seqno 0 and the 1418 * retry bit set as the very first packet on a new TID. 1419 */ 1420 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1421 memset(dup_data[q].last_seq, 0xff, 1422 sizeof(dup_data[q].last_seq)); 1423 mvm_sta->dup_data = dup_data; 1424 } 1425 1426 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1427 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1428 ieee80211_vif_type_p2p(vif)); 1429 if (ret) 1430 goto err; 1431 } 1432 1433 update_fw: 1434 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0); 1435 if (ret) 1436 goto err; 1437 1438 if (vif->type == NL80211_IFTYPE_STATION) { 1439 if (!sta->tdls) { 1440 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1441 mvmvif->ap_sta_id = sta_id; 1442 } else { 1443 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1444 } 1445 } 1446 1447 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1448 1449 return 0; 1450 1451 err: 1452 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1453 iwl_mvm_tdls_sta_deinit(mvm, sta); 1454 return ret; 1455 } 1456 1457 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1458 bool drain) 1459 { 1460 struct iwl_mvm_add_sta_cmd cmd = {}; 1461 int ret; 1462 u32 status; 1463 1464 lockdep_assert_held(&mvm->mutex); 1465 1466 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1467 cmd.sta_id = mvmsta->sta_id; 1468 cmd.add_modify = STA_MODE_MODIFY; 1469 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1470 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1471 1472 status = ADD_STA_SUCCESS; 1473 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1474 iwl_mvm_add_sta_cmd_size(mvm), 1475 &cmd, &status); 1476 if (ret) 1477 return ret; 1478 1479 switch (status & IWL_ADD_STA_STATUS_MASK) { 1480 case ADD_STA_SUCCESS: 1481 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1482 mvmsta->sta_id); 1483 break; 1484 default: 1485 ret = -EIO; 1486 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1487 mvmsta->sta_id); 1488 break; 1489 } 1490 1491 return ret; 1492 } 1493 1494 /* 1495 * Remove a station from the FW table. Before sending the command to remove 1496 * the station validate that the station is indeed known to the driver (sanity 1497 * only). 1498 */ 1499 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1500 { 1501 struct ieee80211_sta *sta; 1502 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1503 .sta_id = sta_id, 1504 }; 1505 int ret; 1506 1507 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1508 lockdep_is_held(&mvm->mutex)); 1509 1510 /* Note: internal stations are marked as error values */ 1511 if (!sta) { 1512 IWL_ERR(mvm, "Invalid station id\n"); 1513 return -EINVAL; 1514 } 1515 1516 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1517 sizeof(rm_sta_cmd), &rm_sta_cmd); 1518 if (ret) { 1519 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1520 return ret; 1521 } 1522 1523 return 0; 1524 } 1525 1526 void iwl_mvm_sta_drained_wk(struct work_struct *wk) 1527 { 1528 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); 1529 u8 sta_id; 1530 1531 /* 1532 * The mutex is needed because of the SYNC cmd, but not only: if the 1533 * work would run concurrently with iwl_mvm_rm_sta, it would run before 1534 * iwl_mvm_rm_sta sets the station as busy, and exit. Then 1535 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean 1536 * that later. 1537 */ 1538 mutex_lock(&mvm->mutex); 1539 1540 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { 1541 int ret; 1542 struct ieee80211_sta *sta = 1543 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1544 lockdep_is_held(&mvm->mutex)); 1545 1546 /* 1547 * This station is in use or RCU-removed; the latter happens in 1548 * managed mode, where mac80211 removes the station before we 1549 * can remove it from firmware (we can only do that after the 1550 * MAC is marked unassociated), and possibly while the deauth 1551 * frame to disconnect from the AP is still queued. Then, the 1552 * station pointer is -ENOENT when the last skb is reclaimed. 1553 */ 1554 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) 1555 continue; 1556 1557 if (PTR_ERR(sta) == -EINVAL) { 1558 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", 1559 sta_id); 1560 continue; 1561 } 1562 1563 if (!sta) { 1564 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", 1565 sta_id); 1566 continue; 1567 } 1568 1569 WARN_ON(PTR_ERR(sta) != -EBUSY); 1570 /* This station was removed and we waited until it got drained, 1571 * we can now proceed and remove it. 1572 */ 1573 ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1574 if (ret) { 1575 IWL_ERR(mvm, 1576 "Couldn't remove sta %d after it was drained\n", 1577 sta_id); 1578 continue; 1579 } 1580 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1581 clear_bit(sta_id, mvm->sta_drained); 1582 1583 if (mvm->tfd_drained[sta_id]) { 1584 unsigned long i, msk = mvm->tfd_drained[sta_id]; 1585 1586 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) 1587 iwl_mvm_disable_txq(mvm, i, i, 1588 IWL_MAX_TID_COUNT, 0); 1589 1590 mvm->tfd_drained[sta_id] = 0; 1591 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", 1592 sta_id, msk); 1593 } 1594 } 1595 1596 mutex_unlock(&mvm->mutex); 1597 } 1598 1599 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1600 struct ieee80211_vif *vif, 1601 struct iwl_mvm_sta *mvm_sta) 1602 { 1603 int ac; 1604 int i; 1605 1606 lockdep_assert_held(&mvm->mutex); 1607 1608 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1609 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1610 continue; 1611 1612 ac = iwl_mvm_tid_to_ac_queue(i); 1613 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1614 vif->hw_queue[ac], i, 0); 1615 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1616 } 1617 } 1618 1619 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1620 struct iwl_mvm_sta *mvm_sta) 1621 { 1622 int i, ret; 1623 1624 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1625 u16 txq_id; 1626 1627 spin_lock_bh(&mvm_sta->lock); 1628 txq_id = mvm_sta->tid_data[i].txq_id; 1629 spin_unlock_bh(&mvm_sta->lock); 1630 1631 if (txq_id == IWL_MVM_INVALID_QUEUE) 1632 continue; 1633 1634 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1635 if (ret) 1636 break; 1637 } 1638 1639 return ret; 1640 } 1641 1642 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1643 struct ieee80211_vif *vif, 1644 struct ieee80211_sta *sta) 1645 { 1646 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1647 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1648 u8 sta_id = mvm_sta->sta_id; 1649 int ret; 1650 1651 lockdep_assert_held(&mvm->mutex); 1652 1653 if (iwl_mvm_has_new_rx_api(mvm)) 1654 kfree(mvm_sta->dup_data); 1655 1656 if ((vif->type == NL80211_IFTYPE_STATION && 1657 mvmvif->ap_sta_id == sta_id) || 1658 iwl_mvm_is_dqa_supported(mvm)){ 1659 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1660 if (ret) 1661 return ret; 1662 /* flush its queues here since we are freeing mvm_sta */ 1663 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1664 if (ret) 1665 return ret; 1666 if (iwl_mvm_has_new_tx_api(mvm)) { 1667 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1668 } else { 1669 u32 q_mask = mvm_sta->tfd_queue_msk; 1670 1671 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1672 q_mask); 1673 } 1674 if (ret) 1675 return ret; 1676 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1677 1678 /* If DQA is supported - the queues can be disabled now */ 1679 if (iwl_mvm_is_dqa_supported(mvm)) { 1680 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1681 /* 1682 * If pending_frames is set at this point - it must be 1683 * driver internal logic error, since queues are empty 1684 * and removed successuly. 1685 * warn on it but set it to 0 anyway to avoid station 1686 * not being removed later in the function 1687 */ 1688 WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0)); 1689 } 1690 1691 /* If there is a TXQ still marked as reserved - free it */ 1692 if (iwl_mvm_is_dqa_supported(mvm) && 1693 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1694 u8 reserved_txq = mvm_sta->reserved_queue; 1695 enum iwl_mvm_queue_status *status; 1696 1697 /* 1698 * If no traffic has gone through the reserved TXQ - it 1699 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1700 * should be manually marked as free again 1701 */ 1702 spin_lock_bh(&mvm->queue_info_lock); 1703 status = &mvm->queue_info[reserved_txq].status; 1704 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1705 (*status != IWL_MVM_QUEUE_FREE), 1706 "sta_id %d reserved txq %d status %d", 1707 sta_id, reserved_txq, *status)) { 1708 spin_unlock_bh(&mvm->queue_info_lock); 1709 return -EINVAL; 1710 } 1711 1712 *status = IWL_MVM_QUEUE_FREE; 1713 spin_unlock_bh(&mvm->queue_info_lock); 1714 } 1715 1716 if (vif->type == NL80211_IFTYPE_STATION && 1717 mvmvif->ap_sta_id == sta_id) { 1718 /* if associated - we can't remove the AP STA now */ 1719 if (vif->bss_conf.assoc) 1720 return ret; 1721 1722 /* unassoc - go ahead - remove the AP STA now */ 1723 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1724 1725 /* clear d0i3_ap_sta_id if no longer relevant */ 1726 if (mvm->d0i3_ap_sta_id == sta_id) 1727 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1728 } 1729 } 1730 1731 /* 1732 * This shouldn't happen - the TDLS channel switch should be canceled 1733 * before the STA is removed. 1734 */ 1735 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1736 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1737 cancel_delayed_work(&mvm->tdls_cs.dwork); 1738 } 1739 1740 /* 1741 * Make sure that the tx response code sees the station as -EBUSY and 1742 * calls the drain worker. 1743 */ 1744 spin_lock_bh(&mvm_sta->lock); 1745 1746 /* 1747 * There are frames pending on the AC queues for this station. 1748 * We need to wait until all the frames are drained... 1749 */ 1750 if (atomic_read(&mvm->pending_frames[sta_id])) { 1751 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], 1752 ERR_PTR(-EBUSY)); 1753 spin_unlock_bh(&mvm_sta->lock); 1754 1755 /* disable TDLS sta queues on drain complete */ 1756 if (sta->tdls) { 1757 mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk; 1758 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id); 1759 } 1760 1761 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1762 } else { 1763 spin_unlock_bh(&mvm_sta->lock); 1764 1765 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1766 iwl_mvm_tdls_sta_deinit(mvm, sta); 1767 1768 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1769 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1770 } 1771 1772 return ret; 1773 } 1774 1775 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1776 struct ieee80211_vif *vif, 1777 u8 sta_id) 1778 { 1779 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1780 1781 lockdep_assert_held(&mvm->mutex); 1782 1783 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1784 return ret; 1785 } 1786 1787 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1788 struct iwl_mvm_int_sta *sta, 1789 u32 qmask, enum nl80211_iftype iftype, 1790 enum iwl_sta_type type) 1791 { 1792 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1793 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1794 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1795 return -ENOSPC; 1796 } 1797 1798 sta->tfd_queue_msk = qmask; 1799 sta->type = type; 1800 1801 /* put a non-NULL value so iterating over the stations won't stop */ 1802 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1803 return 0; 1804 } 1805 1806 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1807 { 1808 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1809 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1810 sta->sta_id = IWL_MVM_INVALID_STA; 1811 } 1812 1813 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1814 struct iwl_mvm_int_sta *sta, 1815 const u8 *addr, 1816 u16 mac_id, u16 color) 1817 { 1818 struct iwl_mvm_add_sta_cmd cmd; 1819 int ret; 1820 u32 status; 1821 1822 lockdep_assert_held(&mvm->mutex); 1823 1824 memset(&cmd, 0, sizeof(cmd)); 1825 cmd.sta_id = sta->sta_id; 1826 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1827 color)); 1828 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1829 cmd.station_type = sta->type; 1830 1831 if (!iwl_mvm_has_new_tx_api(mvm)) 1832 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1833 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1834 1835 if (addr) 1836 memcpy(cmd.addr, addr, ETH_ALEN); 1837 1838 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1839 iwl_mvm_add_sta_cmd_size(mvm), 1840 &cmd, &status); 1841 if (ret) 1842 return ret; 1843 1844 switch (status & IWL_ADD_STA_STATUS_MASK) { 1845 case ADD_STA_SUCCESS: 1846 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1847 return 0; 1848 default: 1849 ret = -EIO; 1850 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1851 status); 1852 break; 1853 } 1854 return ret; 1855 } 1856 1857 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm) 1858 { 1859 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1860 mvm->cfg->base_params->wd_timeout : 1861 IWL_WATCHDOG_DISABLED; 1862 1863 if (iwl_mvm_has_new_tx_api(mvm)) { 1864 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue, 1865 mvm->aux_sta.sta_id, 1866 IWL_MAX_TID_COUNT, 1867 wdg_timeout); 1868 mvm->aux_queue = queue; 1869 } else if (iwl_mvm_is_dqa_supported(mvm)) { 1870 struct iwl_trans_txq_scd_cfg cfg = { 1871 .fifo = IWL_MVM_TX_FIFO_MCAST, 1872 .sta_id = mvm->aux_sta.sta_id, 1873 .tid = IWL_MAX_TID_COUNT, 1874 .aggregate = false, 1875 .frame_limit = IWL_FRAME_LIMIT, 1876 }; 1877 1878 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg, 1879 wdg_timeout); 1880 } else { 1881 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, 1882 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 1883 } 1884 } 1885 1886 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1887 { 1888 int ret; 1889 1890 lockdep_assert_held(&mvm->mutex); 1891 1892 /* Allocate aux station and assign to it the aux queue */ 1893 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1894 NL80211_IFTYPE_UNSPECIFIED, 1895 IWL_STA_AUX_ACTIVITY); 1896 if (ret) 1897 return ret; 1898 1899 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1900 if (!iwl_mvm_has_new_tx_api(mvm)) 1901 iwl_mvm_enable_aux_queue(mvm); 1902 1903 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1904 MAC_INDEX_AUX, 0); 1905 if (ret) { 1906 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1907 return ret; 1908 } 1909 1910 /* 1911 * For a000 firmware and on we cannot add queue to a station unknown 1912 * to firmware so enable queue here - after the station was added 1913 */ 1914 if (iwl_mvm_has_new_tx_api(mvm)) 1915 iwl_mvm_enable_aux_queue(mvm); 1916 1917 return 0; 1918 } 1919 1920 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1921 { 1922 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1923 1924 lockdep_assert_held(&mvm->mutex); 1925 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1926 mvmvif->id, 0); 1927 } 1928 1929 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1930 { 1931 int ret; 1932 1933 lockdep_assert_held(&mvm->mutex); 1934 1935 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1936 if (ret) 1937 IWL_WARN(mvm, "Failed sending remove station\n"); 1938 1939 return ret; 1940 } 1941 1942 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1943 { 1944 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1945 } 1946 1947 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1948 { 1949 lockdep_assert_held(&mvm->mutex); 1950 1951 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1952 } 1953 1954 /* 1955 * Send the add station command for the vif's broadcast station. 1956 * Assumes that the station was already allocated. 1957 * 1958 * @mvm: the mvm component 1959 * @vif: the interface to which the broadcast station is added 1960 * @bsta: the broadcast station to add. 1961 */ 1962 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1963 { 1964 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1965 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1966 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1967 const u8 *baddr = _baddr; 1968 int queue; 1969 int ret; 1970 unsigned int wdg_timeout = 1971 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1972 struct iwl_trans_txq_scd_cfg cfg = { 1973 .fifo = IWL_MVM_TX_FIFO_VO, 1974 .sta_id = mvmvif->bcast_sta.sta_id, 1975 .tid = IWL_MAX_TID_COUNT, 1976 .aggregate = false, 1977 .frame_limit = IWL_FRAME_LIMIT, 1978 }; 1979 1980 lockdep_assert_held(&mvm->mutex); 1981 1982 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1983 if (vif->type == NL80211_IFTYPE_AP || 1984 vif->type == NL80211_IFTYPE_ADHOC) 1985 queue = mvm->probe_queue; 1986 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1987 queue = mvm->p2p_dev_queue; 1988 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 1989 return -EINVAL; 1990 1991 bsta->tfd_queue_msk |= BIT(queue); 1992 1993 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, 1994 &cfg, wdg_timeout); 1995 } 1996 1997 if (vif->type == NL80211_IFTYPE_ADHOC) 1998 baddr = vif->bss_conf.bssid; 1999 2000 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2001 return -ENOSPC; 2002 2003 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2004 mvmvif->id, mvmvif->color); 2005 if (ret) 2006 return ret; 2007 2008 /* 2009 * For a000 firmware and on we cannot add queue to a station unknown 2010 * to firmware so enable queue here - after the station was added 2011 */ 2012 if (iwl_mvm_has_new_tx_api(mvm)) { 2013 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0], 2014 bsta->sta_id, 2015 IWL_MAX_TID_COUNT, 2016 wdg_timeout); 2017 2018 if (vif->type == NL80211_IFTYPE_AP) 2019 mvm->probe_queue = queue; 2020 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2021 mvm->p2p_dev_queue = queue; 2022 } 2023 2024 return 0; 2025 } 2026 2027 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2028 struct ieee80211_vif *vif) 2029 { 2030 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2031 int queue; 2032 2033 lockdep_assert_held(&mvm->mutex); 2034 2035 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2036 2037 switch (vif->type) { 2038 case NL80211_IFTYPE_AP: 2039 case NL80211_IFTYPE_ADHOC: 2040 queue = mvm->probe_queue; 2041 break; 2042 case NL80211_IFTYPE_P2P_DEVICE: 2043 queue = mvm->p2p_dev_queue; 2044 break; 2045 default: 2046 WARN(1, "Can't free bcast queue on vif type %d\n", 2047 vif->type); 2048 return; 2049 } 2050 2051 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0); 2052 if (iwl_mvm_has_new_tx_api(mvm)) 2053 return; 2054 2055 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2056 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2057 } 2058 2059 /* Send the FW a request to remove the station from it's internal data 2060 * structures, but DO NOT remove the entry from the local data structures. */ 2061 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2062 { 2063 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2064 int ret; 2065 2066 lockdep_assert_held(&mvm->mutex); 2067 2068 if (iwl_mvm_is_dqa_supported(mvm)) 2069 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2070 2071 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2072 if (ret) 2073 IWL_WARN(mvm, "Failed sending remove station\n"); 2074 return ret; 2075 } 2076 2077 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2078 { 2079 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2080 u32 qmask = 0; 2081 2082 lockdep_assert_held(&mvm->mutex); 2083 2084 if (!iwl_mvm_is_dqa_supported(mvm)) { 2085 qmask = iwl_mvm_mac_get_queues_mask(vif); 2086 2087 /* 2088 * The firmware defines the TFD queue mask to only be relevant 2089 * for *unicast* queues, so the multicast (CAB) queue shouldn't 2090 * be included. This only happens in NL80211_IFTYPE_AP vif type, 2091 * so the next line will only have an effect there. 2092 */ 2093 qmask &= ~BIT(vif->cab_queue); 2094 } 2095 2096 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, 2097 ieee80211_vif_type_p2p(vif), 2098 IWL_STA_GENERAL_PURPOSE); 2099 } 2100 2101 /* Allocate a new station entry for the broadcast station to the given vif, 2102 * and send it to the FW. 2103 * Note that each P2P mac should have its own broadcast station. 2104 * 2105 * @mvm: the mvm component 2106 * @vif: the interface to which the broadcast station is added 2107 * @bsta: the broadcast station to add. */ 2108 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2109 { 2110 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2111 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2112 int ret; 2113 2114 lockdep_assert_held(&mvm->mutex); 2115 2116 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2117 if (ret) 2118 return ret; 2119 2120 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2121 2122 if (ret) 2123 iwl_mvm_dealloc_int_sta(mvm, bsta); 2124 2125 return ret; 2126 } 2127 2128 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2129 { 2130 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2131 2132 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2133 } 2134 2135 /* 2136 * Send the FW a request to remove the station from it's internal data 2137 * structures, and in addition remove it from the local data structure. 2138 */ 2139 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2140 { 2141 int ret; 2142 2143 lockdep_assert_held(&mvm->mutex); 2144 2145 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2146 2147 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2148 2149 return ret; 2150 } 2151 2152 /* 2153 * Allocate a new station entry for the multicast station to the given vif, 2154 * and send it to the FW. 2155 * Note that each AP/GO mac should have its own multicast station. 2156 * 2157 * @mvm: the mvm component 2158 * @vif: the interface to which the multicast station is added 2159 */ 2160 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2161 { 2162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2163 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2164 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2165 const u8 *maddr = _maddr; 2166 struct iwl_trans_txq_scd_cfg cfg = { 2167 .fifo = IWL_MVM_TX_FIFO_MCAST, 2168 .sta_id = msta->sta_id, 2169 .tid = IWL_MAX_TID_COUNT, 2170 .aggregate = false, 2171 .frame_limit = IWL_FRAME_LIMIT, 2172 }; 2173 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2174 int ret; 2175 2176 lockdep_assert_held(&mvm->mutex); 2177 2178 if (!iwl_mvm_is_dqa_supported(mvm)) 2179 return 0; 2180 2181 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2182 vif->type != NL80211_IFTYPE_ADHOC)) 2183 return -ENOTSUPP; 2184 2185 /* 2186 * While in previous FWs we had to exclude cab queue from TFD queue 2187 * mask, now it is needed as any other queue. 2188 */ 2189 if (!iwl_mvm_has_new_tx_api(mvm) && 2190 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2191 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2192 &cfg, timeout); 2193 msta->tfd_queue_msk |= BIT(vif->cab_queue); 2194 } 2195 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2196 mvmvif->id, mvmvif->color); 2197 if (ret) { 2198 iwl_mvm_dealloc_int_sta(mvm, msta); 2199 return ret; 2200 } 2201 2202 /* 2203 * Enable cab queue after the ADD_STA command is sent. 2204 * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG 2205 * command with unknown station id, and for FW that doesn't support 2206 * station API since the cab queue is not included in the 2207 * tfd_queue_mask. 2208 */ 2209 if (iwl_mvm_has_new_tx_api(mvm)) { 2210 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue, 2211 msta->sta_id, 2212 IWL_MAX_TID_COUNT, 2213 timeout); 2214 mvmvif->cab_queue = queue; 2215 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2216 IWL_UCODE_TLV_API_STA_TYPE)) { 2217 /* 2218 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2219 * invalid, so make sure we use the queue we want. 2220 * Note that this is done here as we want to avoid making DQA 2221 * changes in mac80211 layer. 2222 */ 2223 if (vif->type == NL80211_IFTYPE_ADHOC) { 2224 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2225 mvmvif->cab_queue = vif->cab_queue; 2226 } 2227 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2228 &cfg, timeout); 2229 } 2230 2231 return 0; 2232 } 2233 2234 /* 2235 * Send the FW a request to remove the station from it's internal data 2236 * structures, and in addition remove it from the local data structure. 2237 */ 2238 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2239 { 2240 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2241 int ret; 2242 2243 lockdep_assert_held(&mvm->mutex); 2244 2245 if (!iwl_mvm_is_dqa_supported(mvm)) 2246 return 0; 2247 2248 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2249 2250 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue, 2251 IWL_MAX_TID_COUNT, 0); 2252 2253 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2254 if (ret) 2255 IWL_WARN(mvm, "Failed sending remove station\n"); 2256 2257 return ret; 2258 } 2259 2260 #define IWL_MAX_RX_BA_SESSIONS 16 2261 2262 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2263 { 2264 struct iwl_mvm_delba_notif notif = { 2265 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2266 .metadata.sync = 1, 2267 .delba.baid = baid, 2268 }; 2269 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2270 }; 2271 2272 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2273 struct iwl_mvm_baid_data *data) 2274 { 2275 int i; 2276 2277 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2278 2279 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2280 int j; 2281 struct iwl_mvm_reorder_buffer *reorder_buf = 2282 &data->reorder_buf[i]; 2283 2284 spin_lock_bh(&reorder_buf->lock); 2285 if (likely(!reorder_buf->num_stored)) { 2286 spin_unlock_bh(&reorder_buf->lock); 2287 continue; 2288 } 2289 2290 /* 2291 * This shouldn't happen in regular DELBA since the internal 2292 * delBA notification should trigger a release of all frames in 2293 * the reorder buffer. 2294 */ 2295 WARN_ON(1); 2296 2297 for (j = 0; j < reorder_buf->buf_size; j++) 2298 __skb_queue_purge(&reorder_buf->entries[j]); 2299 /* 2300 * Prevent timer re-arm. This prevents a very far fetched case 2301 * where we timed out on the notification. There may be prior 2302 * RX frames pending in the RX queue before the notification 2303 * that might get processed between now and the actual deletion 2304 * and we would re-arm the timer although we are deleting the 2305 * reorder buffer. 2306 */ 2307 reorder_buf->removed = true; 2308 spin_unlock_bh(&reorder_buf->lock); 2309 del_timer_sync(&reorder_buf->reorder_timer); 2310 } 2311 } 2312 2313 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2314 u32 sta_id, 2315 struct iwl_mvm_baid_data *data, 2316 u16 ssn, u8 buf_size) 2317 { 2318 int i; 2319 2320 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2321 struct iwl_mvm_reorder_buffer *reorder_buf = 2322 &data->reorder_buf[i]; 2323 int j; 2324 2325 reorder_buf->num_stored = 0; 2326 reorder_buf->head_sn = ssn; 2327 reorder_buf->buf_size = buf_size; 2328 /* rx reorder timer */ 2329 reorder_buf->reorder_timer.function = 2330 iwl_mvm_reorder_timer_expired; 2331 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 2332 init_timer(&reorder_buf->reorder_timer); 2333 spin_lock_init(&reorder_buf->lock); 2334 reorder_buf->mvm = mvm; 2335 reorder_buf->queue = i; 2336 reorder_buf->sta_id = sta_id; 2337 reorder_buf->valid = false; 2338 for (j = 0; j < reorder_buf->buf_size; j++) 2339 __skb_queue_head_init(&reorder_buf->entries[j]); 2340 } 2341 } 2342 2343 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2344 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2345 { 2346 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2347 struct iwl_mvm_add_sta_cmd cmd = {}; 2348 struct iwl_mvm_baid_data *baid_data = NULL; 2349 int ret; 2350 u32 status; 2351 2352 lockdep_assert_held(&mvm->mutex); 2353 2354 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2355 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2356 return -ENOSPC; 2357 } 2358 2359 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2360 /* 2361 * Allocate here so if allocation fails we can bail out early 2362 * before starting the BA session in the firmware 2363 */ 2364 baid_data = kzalloc(sizeof(*baid_data) + 2365 mvm->trans->num_rx_queues * 2366 sizeof(baid_data->reorder_buf[0]), 2367 GFP_KERNEL); 2368 if (!baid_data) 2369 return -ENOMEM; 2370 } 2371 2372 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2373 cmd.sta_id = mvm_sta->sta_id; 2374 cmd.add_modify = STA_MODE_MODIFY; 2375 if (start) { 2376 cmd.add_immediate_ba_tid = (u8) tid; 2377 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2378 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2379 } else { 2380 cmd.remove_immediate_ba_tid = (u8) tid; 2381 } 2382 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2383 STA_MODIFY_REMOVE_BA_TID; 2384 2385 status = ADD_STA_SUCCESS; 2386 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2387 iwl_mvm_add_sta_cmd_size(mvm), 2388 &cmd, &status); 2389 if (ret) 2390 goto out_free; 2391 2392 switch (status & IWL_ADD_STA_STATUS_MASK) { 2393 case ADD_STA_SUCCESS: 2394 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2395 start ? "start" : "stopp"); 2396 break; 2397 case ADD_STA_IMMEDIATE_BA_FAILURE: 2398 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2399 ret = -ENOSPC; 2400 break; 2401 default: 2402 ret = -EIO; 2403 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2404 start ? "start" : "stopp", status); 2405 break; 2406 } 2407 2408 if (ret) 2409 goto out_free; 2410 2411 if (start) { 2412 u8 baid; 2413 2414 mvm->rx_ba_sessions++; 2415 2416 if (!iwl_mvm_has_new_rx_api(mvm)) 2417 return 0; 2418 2419 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2420 ret = -EINVAL; 2421 goto out_free; 2422 } 2423 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2424 IWL_ADD_STA_BAID_SHIFT); 2425 baid_data->baid = baid; 2426 baid_data->timeout = timeout; 2427 baid_data->last_rx = jiffies; 2428 setup_timer(&baid_data->session_timer, 2429 iwl_mvm_rx_agg_session_expired, 2430 (unsigned long)&mvm->baid_map[baid]); 2431 baid_data->mvm = mvm; 2432 baid_data->tid = tid; 2433 baid_data->sta_id = mvm_sta->sta_id; 2434 2435 mvm_sta->tid_to_baid[tid] = baid; 2436 if (timeout) 2437 mod_timer(&baid_data->session_timer, 2438 TU_TO_EXP_TIME(timeout * 2)); 2439 2440 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 2441 baid_data, ssn, buf_size); 2442 /* 2443 * protect the BA data with RCU to cover a case where our 2444 * internal RX sync mechanism will timeout (not that it's 2445 * supposed to happen) and we will free the session data while 2446 * RX is being processed in parallel 2447 */ 2448 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2449 mvm_sta->sta_id, tid, baid); 2450 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2451 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2452 } else { 2453 u8 baid = mvm_sta->tid_to_baid[tid]; 2454 2455 if (mvm->rx_ba_sessions > 0) 2456 /* check that restart flow didn't zero the counter */ 2457 mvm->rx_ba_sessions--; 2458 if (!iwl_mvm_has_new_rx_api(mvm)) 2459 return 0; 2460 2461 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2462 return -EINVAL; 2463 2464 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2465 if (WARN_ON(!baid_data)) 2466 return -EINVAL; 2467 2468 /* synchronize all rx queues so we can safely delete */ 2469 iwl_mvm_free_reorder(mvm, baid_data); 2470 del_timer_sync(&baid_data->session_timer); 2471 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2472 kfree_rcu(baid_data, rcu_head); 2473 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2474 } 2475 return 0; 2476 2477 out_free: 2478 kfree(baid_data); 2479 return ret; 2480 } 2481 2482 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2483 int tid, u8 queue, bool start) 2484 { 2485 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2486 struct iwl_mvm_add_sta_cmd cmd = {}; 2487 int ret; 2488 u32 status; 2489 2490 lockdep_assert_held(&mvm->mutex); 2491 2492 if (start) { 2493 mvm_sta->tfd_queue_msk |= BIT(queue); 2494 mvm_sta->tid_disable_agg &= ~BIT(tid); 2495 } else { 2496 /* In DQA-mode the queue isn't removed on agg termination */ 2497 if (!iwl_mvm_is_dqa_supported(mvm)) 2498 mvm_sta->tfd_queue_msk &= ~BIT(queue); 2499 mvm_sta->tid_disable_agg |= BIT(tid); 2500 } 2501 2502 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2503 cmd.sta_id = mvm_sta->sta_id; 2504 cmd.add_modify = STA_MODE_MODIFY; 2505 if (!iwl_mvm_has_new_tx_api(mvm)) 2506 cmd.modify_mask = STA_MODIFY_QUEUES; 2507 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2508 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2509 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2510 2511 status = ADD_STA_SUCCESS; 2512 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2513 iwl_mvm_add_sta_cmd_size(mvm), 2514 &cmd, &status); 2515 if (ret) 2516 return ret; 2517 2518 switch (status & IWL_ADD_STA_STATUS_MASK) { 2519 case ADD_STA_SUCCESS: 2520 break; 2521 default: 2522 ret = -EIO; 2523 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2524 start ? "start" : "stopp", status); 2525 break; 2526 } 2527 2528 return ret; 2529 } 2530 2531 const u8 tid_to_mac80211_ac[] = { 2532 IEEE80211_AC_BE, 2533 IEEE80211_AC_BK, 2534 IEEE80211_AC_BK, 2535 IEEE80211_AC_BE, 2536 IEEE80211_AC_VI, 2537 IEEE80211_AC_VI, 2538 IEEE80211_AC_VO, 2539 IEEE80211_AC_VO, 2540 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2541 }; 2542 2543 static const u8 tid_to_ucode_ac[] = { 2544 AC_BE, 2545 AC_BK, 2546 AC_BK, 2547 AC_BE, 2548 AC_VI, 2549 AC_VI, 2550 AC_VO, 2551 AC_VO, 2552 }; 2553 2554 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2555 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2556 { 2557 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2558 struct iwl_mvm_tid_data *tid_data; 2559 u16 normalized_ssn; 2560 int txq_id; 2561 int ret; 2562 2563 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2564 return -EINVAL; 2565 2566 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2567 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 2568 mvmsta->tid_data[tid].state); 2569 return -ENXIO; 2570 } 2571 2572 lockdep_assert_held(&mvm->mutex); 2573 2574 spin_lock_bh(&mvmsta->lock); 2575 2576 /* possible race condition - we entered D0i3 while starting agg */ 2577 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2578 spin_unlock_bh(&mvmsta->lock); 2579 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2580 return -EIO; 2581 } 2582 2583 spin_lock(&mvm->queue_info_lock); 2584 2585 /* 2586 * Note the possible cases: 2587 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2588 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2589 * one and mark it as reserved 2590 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2591 * non-DQA mode, since the TXQ hasn't yet been allocated 2592 * Don't support case 3 for new TX path as it is not expected to happen 2593 * and aggregation will be offloaded soon anyway 2594 */ 2595 txq_id = mvmsta->tid_data[tid].txq_id; 2596 if (iwl_mvm_has_new_tx_api(mvm)) { 2597 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2598 ret = -ENXIO; 2599 goto release_locks; 2600 } 2601 } else if (iwl_mvm_is_dqa_supported(mvm) && 2602 unlikely(mvm->queue_info[txq_id].status == 2603 IWL_MVM_QUEUE_SHARED)) { 2604 ret = -ENXIO; 2605 IWL_DEBUG_TX_QUEUES(mvm, 2606 "Can't start tid %d agg on shared queue!\n", 2607 tid); 2608 goto release_locks; 2609 } else if (!iwl_mvm_is_dqa_supported(mvm) || 2610 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2611 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2612 mvm->first_agg_queue, 2613 mvm->last_agg_queue); 2614 if (txq_id < 0) { 2615 ret = txq_id; 2616 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2617 goto release_locks; 2618 } 2619 /* 2620 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2621 * an inactive queue from iwl_mvm_find_free_queue() is 2622 * certainly a bug 2623 */ 2624 WARN_ON(mvm->queue_info[txq_id].status == 2625 IWL_MVM_QUEUE_INACTIVE); 2626 2627 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2628 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2629 } 2630 2631 spin_unlock(&mvm->queue_info_lock); 2632 2633 IWL_DEBUG_TX_QUEUES(mvm, 2634 "AGG for tid %d will be on queue #%d\n", 2635 tid, txq_id); 2636 2637 tid_data = &mvmsta->tid_data[tid]; 2638 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2639 tid_data->txq_id = txq_id; 2640 *ssn = tid_data->ssn; 2641 2642 IWL_DEBUG_TX_QUEUES(mvm, 2643 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2644 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2645 tid_data->next_reclaimed); 2646 2647 /* 2648 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 2649 * to align the wrap around of ssn so we compare relevant values. 2650 */ 2651 normalized_ssn = tid_data->ssn; 2652 if (mvm->trans->cfg->gen2) 2653 normalized_ssn &= 0xff; 2654 2655 if (normalized_ssn == tid_data->next_reclaimed) { 2656 tid_data->state = IWL_AGG_STARTING; 2657 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2658 } else { 2659 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2660 } 2661 2662 ret = 0; 2663 goto out; 2664 2665 release_locks: 2666 spin_unlock(&mvm->queue_info_lock); 2667 out: 2668 spin_unlock_bh(&mvmsta->lock); 2669 2670 return ret; 2671 } 2672 2673 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2674 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2675 bool amsdu) 2676 { 2677 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2678 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2679 unsigned int wdg_timeout = 2680 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2681 int queue, ret; 2682 bool alloc_queue = true; 2683 enum iwl_mvm_queue_status queue_status; 2684 u16 ssn; 2685 2686 struct iwl_trans_txq_scd_cfg cfg = { 2687 .sta_id = mvmsta->sta_id, 2688 .tid = tid, 2689 .frame_limit = buf_size, 2690 .aggregate = true, 2691 }; 2692 2693 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2694 != IWL_MAX_TID_COUNT); 2695 2696 if (!mvm->trans->cfg->gen2) 2697 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2698 else 2699 buf_size = min_t(int, buf_size, 2700 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF); 2701 2702 spin_lock_bh(&mvmsta->lock); 2703 ssn = tid_data->ssn; 2704 queue = tid_data->txq_id; 2705 tid_data->state = IWL_AGG_ON; 2706 mvmsta->agg_tids |= BIT(tid); 2707 tid_data->ssn = 0xffff; 2708 tid_data->amsdu_in_ampdu_allowed = amsdu; 2709 spin_unlock_bh(&mvmsta->lock); 2710 2711 if (iwl_mvm_has_new_tx_api(mvm)) { 2712 /* 2713 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so 2714 * no need to check queue's status 2715 */ 2716 if (buf_size < mvmsta->max_agg_bufsize) 2717 return -ENOTSUPP; 2718 2719 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2720 if (ret) 2721 return -EIO; 2722 goto out; 2723 } 2724 2725 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2726 2727 spin_lock_bh(&mvm->queue_info_lock); 2728 queue_status = mvm->queue_info[queue].status; 2729 spin_unlock_bh(&mvm->queue_info_lock); 2730 2731 /* In DQA mode, the existing queue might need to be reconfigured */ 2732 if (iwl_mvm_is_dqa_supported(mvm)) { 2733 /* Maybe there is no need to even alloc a queue... */ 2734 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2735 alloc_queue = false; 2736 2737 /* 2738 * Only reconfig the SCD for the queue if the window size has 2739 * changed from current (become smaller) 2740 */ 2741 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2742 /* 2743 * If reconfiguring an existing queue, it first must be 2744 * drained 2745 */ 2746 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2747 BIT(queue)); 2748 if (ret) { 2749 IWL_ERR(mvm, 2750 "Error draining queue before reconfig\n"); 2751 return ret; 2752 } 2753 2754 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2755 mvmsta->sta_id, tid, 2756 buf_size, ssn); 2757 if (ret) { 2758 IWL_ERR(mvm, 2759 "Error reconfiguring TXQ #%d\n", queue); 2760 return ret; 2761 } 2762 } 2763 } 2764 2765 if (alloc_queue) 2766 iwl_mvm_enable_txq(mvm, queue, 2767 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2768 &cfg, wdg_timeout); 2769 2770 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2771 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2772 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2773 if (ret) 2774 return -EIO; 2775 } 2776 2777 /* No need to mark as reserved */ 2778 spin_lock_bh(&mvm->queue_info_lock); 2779 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2780 spin_unlock_bh(&mvm->queue_info_lock); 2781 2782 out: 2783 /* 2784 * Even though in theory the peer could have different 2785 * aggregation reorder buffer sizes for different sessions, 2786 * our ucode doesn't allow for that and has a global limit 2787 * for each station. Therefore, use the minimum of all the 2788 * aggregation sessions and our default value. 2789 */ 2790 mvmsta->max_agg_bufsize = 2791 min(mvmsta->max_agg_bufsize, buf_size); 2792 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2793 2794 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2795 sta->addr, tid); 2796 2797 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2798 } 2799 2800 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2801 struct iwl_mvm_sta *mvmsta, 2802 u16 txq_id) 2803 { 2804 if (iwl_mvm_has_new_tx_api(mvm)) 2805 return; 2806 2807 spin_lock_bh(&mvm->queue_info_lock); 2808 /* 2809 * The TXQ is marked as reserved only if no traffic came through yet 2810 * This means no traffic has been sent on this TID (agg'd or not), so 2811 * we no longer have use for the queue. Since it hasn't even been 2812 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2813 * free. 2814 */ 2815 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2816 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2817 2818 spin_unlock_bh(&mvm->queue_info_lock); 2819 } 2820 2821 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2822 struct ieee80211_sta *sta, u16 tid) 2823 { 2824 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2825 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2826 u16 txq_id; 2827 int err; 2828 2829 /* 2830 * If mac80211 is cleaning its state, then say that we finished since 2831 * our state has been cleared anyway. 2832 */ 2833 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2834 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2835 return 0; 2836 } 2837 2838 spin_lock_bh(&mvmsta->lock); 2839 2840 txq_id = tid_data->txq_id; 2841 2842 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2843 mvmsta->sta_id, tid, txq_id, tid_data->state); 2844 2845 mvmsta->agg_tids &= ~BIT(tid); 2846 2847 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2848 2849 switch (tid_data->state) { 2850 case IWL_AGG_ON: 2851 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2852 2853 IWL_DEBUG_TX_QUEUES(mvm, 2854 "ssn = %d, next_recl = %d\n", 2855 tid_data->ssn, tid_data->next_reclaimed); 2856 2857 /* 2858 * There are still packets for this RA / TID in the HW. 2859 * Not relevant for DQA mode, since there is no need to disable 2860 * the queue. 2861 */ 2862 if (!iwl_mvm_is_dqa_supported(mvm) && 2863 tid_data->ssn != tid_data->next_reclaimed) { 2864 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; 2865 err = 0; 2866 break; 2867 } 2868 2869 tid_data->ssn = 0xffff; 2870 tid_data->state = IWL_AGG_OFF; 2871 spin_unlock_bh(&mvmsta->lock); 2872 2873 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2874 2875 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2876 2877 if (!iwl_mvm_is_dqa_supported(mvm)) { 2878 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2879 2880 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0); 2881 } 2882 return 0; 2883 case IWL_AGG_STARTING: 2884 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2885 /* 2886 * The agg session has been stopped before it was set up. This 2887 * can happen when the AddBA timer times out for example. 2888 */ 2889 2890 /* No barriers since we are under mutex */ 2891 lockdep_assert_held(&mvm->mutex); 2892 2893 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2894 tid_data->state = IWL_AGG_OFF; 2895 err = 0; 2896 break; 2897 default: 2898 IWL_ERR(mvm, 2899 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2900 mvmsta->sta_id, tid, tid_data->state); 2901 IWL_ERR(mvm, 2902 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2903 err = -EINVAL; 2904 } 2905 2906 spin_unlock_bh(&mvmsta->lock); 2907 2908 return err; 2909 } 2910 2911 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2912 struct ieee80211_sta *sta, u16 tid) 2913 { 2914 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2915 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2916 u16 txq_id; 2917 enum iwl_mvm_agg_state old_state; 2918 2919 /* 2920 * First set the agg state to OFF to avoid calling 2921 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2922 */ 2923 spin_lock_bh(&mvmsta->lock); 2924 txq_id = tid_data->txq_id; 2925 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2926 mvmsta->sta_id, tid, txq_id, tid_data->state); 2927 old_state = tid_data->state; 2928 tid_data->state = IWL_AGG_OFF; 2929 mvmsta->agg_tids &= ~BIT(tid); 2930 spin_unlock_bh(&mvmsta->lock); 2931 2932 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2933 2934 if (old_state >= IWL_AGG_ON) { 2935 iwl_mvm_drain_sta(mvm, mvmsta, true); 2936 2937 if (iwl_mvm_has_new_tx_api(mvm)) { 2938 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2939 BIT(tid), 0)) 2940 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2941 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2942 } else { 2943 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2944 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2945 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2946 } 2947 2948 iwl_mvm_drain_sta(mvm, mvmsta, false); 2949 2950 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2951 2952 if (!iwl_mvm_is_dqa_supported(mvm)) { 2953 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2954 2955 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue, 2956 tid, 0); 2957 } 2958 } 2959 2960 return 0; 2961 } 2962 2963 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2964 { 2965 int i, max = -1, max_offs = -1; 2966 2967 lockdep_assert_held(&mvm->mutex); 2968 2969 /* Pick the unused key offset with the highest 'deleted' 2970 * counter. Every time a key is deleted, all the counters 2971 * are incremented and the one that was just deleted is 2972 * reset to zero. Thus, the highest counter is the one 2973 * that was deleted longest ago. Pick that one. 2974 */ 2975 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2976 if (test_bit(i, mvm->fw_key_table)) 2977 continue; 2978 if (mvm->fw_key_deleted[i] > max) { 2979 max = mvm->fw_key_deleted[i]; 2980 max_offs = i; 2981 } 2982 } 2983 2984 if (max_offs < 0) 2985 return STA_KEY_IDX_INVALID; 2986 2987 return max_offs; 2988 } 2989 2990 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2991 struct ieee80211_vif *vif, 2992 struct ieee80211_sta *sta) 2993 { 2994 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2995 2996 if (sta) 2997 return iwl_mvm_sta_from_mac80211(sta); 2998 2999 /* 3000 * The device expects GTKs for station interfaces to be 3001 * installed as GTKs for the AP station. If we have no 3002 * station ID, then use AP's station ID. 3003 */ 3004 if (vif->type == NL80211_IFTYPE_STATION && 3005 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3006 u8 sta_id = mvmvif->ap_sta_id; 3007 3008 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3009 lockdep_is_held(&mvm->mutex)); 3010 3011 /* 3012 * It is possible that the 'sta' parameter is NULL, 3013 * for example when a GTK is removed - the sta_id will then 3014 * be the AP ID, and no station was passed by mac80211. 3015 */ 3016 if (IS_ERR_OR_NULL(sta)) 3017 return NULL; 3018 3019 return iwl_mvm_sta_from_mac80211(sta); 3020 } 3021 3022 return NULL; 3023 } 3024 3025 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3026 u32 sta_id, 3027 struct ieee80211_key_conf *key, bool mcast, 3028 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3029 u8 key_offset) 3030 { 3031 union { 3032 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3033 struct iwl_mvm_add_sta_key_cmd cmd; 3034 } u = {}; 3035 __le16 key_flags; 3036 int ret; 3037 u32 status; 3038 u16 keyidx; 3039 u64 pn = 0; 3040 int i, size; 3041 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3042 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3043 3044 if (sta_id == IWL_MVM_INVALID_STA) 3045 return -EINVAL; 3046 3047 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3048 STA_KEY_FLG_KEYID_MSK; 3049 key_flags = cpu_to_le16(keyidx); 3050 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3051 3052 switch (key->cipher) { 3053 case WLAN_CIPHER_SUITE_TKIP: 3054 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3055 if (new_api) { 3056 memcpy((void *)&u.cmd.tx_mic_key, 3057 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3058 IWL_MIC_KEY_SIZE); 3059 3060 memcpy((void *)&u.cmd.rx_mic_key, 3061 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3062 IWL_MIC_KEY_SIZE); 3063 pn = atomic64_read(&key->tx_pn); 3064 3065 } else { 3066 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3067 for (i = 0; i < 5; i++) 3068 u.cmd_v1.tkip_rx_ttak[i] = 3069 cpu_to_le16(tkip_p1k[i]); 3070 } 3071 memcpy(u.cmd.common.key, key->key, key->keylen); 3072 break; 3073 case WLAN_CIPHER_SUITE_CCMP: 3074 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3075 memcpy(u.cmd.common.key, key->key, key->keylen); 3076 if (new_api) 3077 pn = atomic64_read(&key->tx_pn); 3078 break; 3079 case WLAN_CIPHER_SUITE_WEP104: 3080 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3081 /* fall through */ 3082 case WLAN_CIPHER_SUITE_WEP40: 3083 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3084 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3085 break; 3086 case WLAN_CIPHER_SUITE_GCMP_256: 3087 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3088 /* fall through */ 3089 case WLAN_CIPHER_SUITE_GCMP: 3090 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3091 memcpy(u.cmd.common.key, key->key, key->keylen); 3092 if (new_api) 3093 pn = atomic64_read(&key->tx_pn); 3094 break; 3095 default: 3096 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3097 memcpy(u.cmd.common.key, key->key, key->keylen); 3098 } 3099 3100 if (mcast) 3101 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3102 3103 u.cmd.common.key_offset = key_offset; 3104 u.cmd.common.key_flags = key_flags; 3105 u.cmd.common.sta_id = sta_id; 3106 3107 if (new_api) { 3108 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3109 size = sizeof(u.cmd); 3110 } else { 3111 size = sizeof(u.cmd_v1); 3112 } 3113 3114 status = ADD_STA_SUCCESS; 3115 if (cmd_flags & CMD_ASYNC) 3116 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3117 &u.cmd); 3118 else 3119 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3120 &u.cmd, &status); 3121 3122 switch (status) { 3123 case ADD_STA_SUCCESS: 3124 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3125 break; 3126 default: 3127 ret = -EIO; 3128 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3129 break; 3130 } 3131 3132 return ret; 3133 } 3134 3135 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3136 struct ieee80211_key_conf *keyconf, 3137 u8 sta_id, bool remove_key) 3138 { 3139 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3140 3141 /* verify the key details match the required command's expectations */ 3142 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3143 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3144 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3145 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3146 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3147 return -EINVAL; 3148 3149 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3150 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3151 return -EINVAL; 3152 3153 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3154 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3155 3156 if (remove_key) { 3157 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3158 } else { 3159 struct ieee80211_key_seq seq; 3160 const u8 *pn; 3161 3162 switch (keyconf->cipher) { 3163 case WLAN_CIPHER_SUITE_AES_CMAC: 3164 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3165 break; 3166 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3167 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3168 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3169 break; 3170 default: 3171 return -EINVAL; 3172 } 3173 3174 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3175 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3176 igtk_cmd.ctrl_flags |= 3177 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3178 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3179 pn = seq.aes_cmac.pn; 3180 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3181 ((u64) pn[4] << 8) | 3182 ((u64) pn[3] << 16) | 3183 ((u64) pn[2] << 24) | 3184 ((u64) pn[1] << 32) | 3185 ((u64) pn[0] << 40)); 3186 } 3187 3188 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3189 remove_key ? "removing" : "installing", 3190 igtk_cmd.sta_id); 3191 3192 if (!iwl_mvm_has_new_rx_api(mvm)) { 3193 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3194 .ctrl_flags = igtk_cmd.ctrl_flags, 3195 .key_id = igtk_cmd.key_id, 3196 .sta_id = igtk_cmd.sta_id, 3197 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3198 }; 3199 3200 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3201 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3202 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3203 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3204 } 3205 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3206 sizeof(igtk_cmd), &igtk_cmd); 3207 } 3208 3209 3210 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3211 struct ieee80211_vif *vif, 3212 struct ieee80211_sta *sta) 3213 { 3214 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3215 3216 if (sta) 3217 return sta->addr; 3218 3219 if (vif->type == NL80211_IFTYPE_STATION && 3220 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3221 u8 sta_id = mvmvif->ap_sta_id; 3222 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3223 lockdep_is_held(&mvm->mutex)); 3224 return sta->addr; 3225 } 3226 3227 3228 return NULL; 3229 } 3230 3231 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3232 struct ieee80211_vif *vif, 3233 struct ieee80211_sta *sta, 3234 struct ieee80211_key_conf *keyconf, 3235 u8 key_offset, 3236 bool mcast) 3237 { 3238 int ret; 3239 const u8 *addr; 3240 struct ieee80211_key_seq seq; 3241 u16 p1k[5]; 3242 u32 sta_id; 3243 3244 if (sta) { 3245 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3246 3247 sta_id = mvm_sta->sta_id; 3248 } else if (vif->type == NL80211_IFTYPE_AP && 3249 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3250 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3251 3252 sta_id = mvmvif->mcast_sta.sta_id; 3253 } else { 3254 IWL_ERR(mvm, "Failed to find station id\n"); 3255 return -EINVAL; 3256 } 3257 3258 switch (keyconf->cipher) { 3259 case WLAN_CIPHER_SUITE_TKIP: 3260 if (vif->type == NL80211_IFTYPE_AP) { 3261 ret = -EINVAL; 3262 break; 3263 } 3264 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3265 /* get phase 1 key from mac80211 */ 3266 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3267 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3268 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3269 seq.tkip.iv32, p1k, 0, key_offset); 3270 break; 3271 case WLAN_CIPHER_SUITE_CCMP: 3272 case WLAN_CIPHER_SUITE_WEP40: 3273 case WLAN_CIPHER_SUITE_WEP104: 3274 case WLAN_CIPHER_SUITE_GCMP: 3275 case WLAN_CIPHER_SUITE_GCMP_256: 3276 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3277 0, NULL, 0, key_offset); 3278 break; 3279 default: 3280 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3281 0, NULL, 0, key_offset); 3282 } 3283 3284 return ret; 3285 } 3286 3287 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3288 struct ieee80211_key_conf *keyconf, 3289 bool mcast) 3290 { 3291 union { 3292 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3293 struct iwl_mvm_add_sta_key_cmd cmd; 3294 } u = {}; 3295 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3296 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3297 __le16 key_flags; 3298 int ret, size; 3299 u32 status; 3300 3301 if (sta_id == IWL_MVM_INVALID_STA) 3302 return -EINVAL; 3303 3304 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3305 STA_KEY_FLG_KEYID_MSK); 3306 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3307 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3308 3309 if (mcast) 3310 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3311 3312 /* 3313 * The fields assigned here are in the same location at the start 3314 * of the command, so we can do this union trick. 3315 */ 3316 u.cmd.common.key_flags = key_flags; 3317 u.cmd.common.key_offset = keyconf->hw_key_idx; 3318 u.cmd.common.sta_id = sta_id; 3319 3320 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3321 3322 status = ADD_STA_SUCCESS; 3323 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3324 &status); 3325 3326 switch (status) { 3327 case ADD_STA_SUCCESS: 3328 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3329 break; 3330 default: 3331 ret = -EIO; 3332 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3333 break; 3334 } 3335 3336 return ret; 3337 } 3338 3339 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3340 struct ieee80211_vif *vif, 3341 struct ieee80211_sta *sta, 3342 struct ieee80211_key_conf *keyconf, 3343 u8 key_offset) 3344 { 3345 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3346 struct iwl_mvm_sta *mvm_sta; 3347 u8 sta_id = IWL_MVM_INVALID_STA; 3348 int ret; 3349 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3350 3351 lockdep_assert_held(&mvm->mutex); 3352 3353 if (vif->type != NL80211_IFTYPE_AP || 3354 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3355 /* Get the station id from the mvm local station table */ 3356 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3357 if (!mvm_sta) { 3358 IWL_ERR(mvm, "Failed to find station\n"); 3359 return -EINVAL; 3360 } 3361 sta_id = mvm_sta->sta_id; 3362 3363 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3364 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3365 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3366 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, 3367 false); 3368 goto end; 3369 } 3370 3371 /* 3372 * It is possible that the 'sta' parameter is NULL, and thus 3373 * there is a need to retrieve the sta from the local station 3374 * table. 3375 */ 3376 if (!sta) { 3377 sta = rcu_dereference_protected( 3378 mvm->fw_id_to_mac_id[sta_id], 3379 lockdep_is_held(&mvm->mutex)); 3380 if (IS_ERR_OR_NULL(sta)) { 3381 IWL_ERR(mvm, "Invalid station id\n"); 3382 return -EINVAL; 3383 } 3384 } 3385 3386 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3387 return -EINVAL; 3388 } 3389 3390 /* If the key_offset is not pre-assigned, we need to find a 3391 * new offset to use. In normal cases, the offset is not 3392 * pre-assigned, but during HW_RESTART we want to reuse the 3393 * same indices, so we pass them when this function is called. 3394 * 3395 * In D3 entry, we need to hardcoded the indices (because the 3396 * firmware hardcodes the PTK offset to 0). In this case, we 3397 * need to make sure we don't overwrite the hw_key_idx in the 3398 * keyconf structure, because otherwise we cannot configure 3399 * the original ones back when resuming. 3400 */ 3401 if (key_offset == STA_KEY_IDX_INVALID) { 3402 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3403 if (key_offset == STA_KEY_IDX_INVALID) 3404 return -ENOSPC; 3405 keyconf->hw_key_idx = key_offset; 3406 } 3407 3408 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3409 if (ret) 3410 goto end; 3411 3412 /* 3413 * For WEP, the same key is used for multicast and unicast. Upload it 3414 * again, using the same key offset, and now pointing the other one 3415 * to the same key slot (offset). 3416 * If this fails, remove the original as well. 3417 */ 3418 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3419 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3420 sta) { 3421 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3422 key_offset, !mcast); 3423 if (ret) { 3424 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3425 goto end; 3426 } 3427 } 3428 3429 __set_bit(key_offset, mvm->fw_key_table); 3430 3431 end: 3432 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3433 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3434 sta ? sta->addr : zero_addr, ret); 3435 return ret; 3436 } 3437 3438 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3439 struct ieee80211_vif *vif, 3440 struct ieee80211_sta *sta, 3441 struct ieee80211_key_conf *keyconf) 3442 { 3443 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3444 struct iwl_mvm_sta *mvm_sta; 3445 u8 sta_id = IWL_MVM_INVALID_STA; 3446 int ret, i; 3447 3448 lockdep_assert_held(&mvm->mutex); 3449 3450 /* Get the station from the mvm local station table */ 3451 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3452 if (mvm_sta) 3453 sta_id = mvm_sta->sta_id; 3454 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3455 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3456 3457 3458 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3459 keyconf->keyidx, sta_id); 3460 3461 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3462 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3463 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3464 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3465 3466 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3467 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3468 keyconf->hw_key_idx); 3469 return -ENOENT; 3470 } 3471 3472 /* track which key was deleted last */ 3473 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3474 if (mvm->fw_key_deleted[i] < U8_MAX) 3475 mvm->fw_key_deleted[i]++; 3476 } 3477 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3478 3479 if (sta && !mvm_sta) { 3480 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3481 return 0; 3482 } 3483 3484 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3485 if (ret) 3486 return ret; 3487 3488 /* delete WEP key twice to get rid of (now useless) offset */ 3489 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3490 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3491 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3492 3493 return ret; 3494 } 3495 3496 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3497 struct ieee80211_vif *vif, 3498 struct ieee80211_key_conf *keyconf, 3499 struct ieee80211_sta *sta, u32 iv32, 3500 u16 *phase1key) 3501 { 3502 struct iwl_mvm_sta *mvm_sta; 3503 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3504 3505 rcu_read_lock(); 3506 3507 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3508 if (WARN_ON_ONCE(!mvm_sta)) 3509 goto unlock; 3510 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3511 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3512 3513 unlock: 3514 rcu_read_unlock(); 3515 } 3516 3517 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3518 struct ieee80211_sta *sta) 3519 { 3520 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3521 struct iwl_mvm_add_sta_cmd cmd = { 3522 .add_modify = STA_MODE_MODIFY, 3523 .sta_id = mvmsta->sta_id, 3524 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3525 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3526 }; 3527 int ret; 3528 3529 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3530 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3531 if (ret) 3532 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3533 } 3534 3535 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3536 struct ieee80211_sta *sta, 3537 enum ieee80211_frame_release_type reason, 3538 u16 cnt, u16 tids, bool more_data, 3539 bool single_sta_queue) 3540 { 3541 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3542 struct iwl_mvm_add_sta_cmd cmd = { 3543 .add_modify = STA_MODE_MODIFY, 3544 .sta_id = mvmsta->sta_id, 3545 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3546 .sleep_tx_count = cpu_to_le16(cnt), 3547 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3548 }; 3549 int tid, ret; 3550 unsigned long _tids = tids; 3551 3552 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3553 * Note that this field is reserved and unused by firmware not 3554 * supporting GO uAPSD, so it's safe to always do this. 3555 */ 3556 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3557 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3558 3559 /* If we're releasing frames from aggregation or dqa queues then check 3560 * if all the queues that we're releasing frames from, combined, have: 3561 * - more frames than the service period, in which case more_data 3562 * needs to be set 3563 * - fewer than 'cnt' frames, in which case we need to adjust the 3564 * firmware command (but do that unconditionally) 3565 */ 3566 if (single_sta_queue) { 3567 int remaining = cnt; 3568 int sleep_tx_count; 3569 3570 spin_lock_bh(&mvmsta->lock); 3571 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3572 struct iwl_mvm_tid_data *tid_data; 3573 u16 n_queued; 3574 3575 tid_data = &mvmsta->tid_data[tid]; 3576 if (WARN(!iwl_mvm_is_dqa_supported(mvm) && 3577 tid_data->state != IWL_AGG_ON && 3578 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, 3579 "TID %d state is %d\n", 3580 tid, tid_data->state)) { 3581 spin_unlock_bh(&mvmsta->lock); 3582 ieee80211_sta_eosp(sta); 3583 return; 3584 } 3585 3586 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3587 if (n_queued > remaining) { 3588 more_data = true; 3589 remaining = 0; 3590 break; 3591 } 3592 remaining -= n_queued; 3593 } 3594 sleep_tx_count = cnt - remaining; 3595 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3596 mvmsta->sleep_tx_count = sleep_tx_count; 3597 spin_unlock_bh(&mvmsta->lock); 3598 3599 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3600 if (WARN_ON(cnt - remaining == 0)) { 3601 ieee80211_sta_eosp(sta); 3602 return; 3603 } 3604 } 3605 3606 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3607 if (more_data) 3608 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3609 3610 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3611 mvmsta->next_status_eosp = true; 3612 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3613 } else { 3614 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3615 } 3616 3617 /* block the Tx queues until the FW updated the sleep Tx count */ 3618 iwl_trans_block_txq_ptrs(mvm->trans, true); 3619 3620 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3621 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3622 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3623 if (ret) 3624 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3625 } 3626 3627 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3628 struct iwl_rx_cmd_buffer *rxb) 3629 { 3630 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3631 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3632 struct ieee80211_sta *sta; 3633 u32 sta_id = le32_to_cpu(notif->sta_id); 3634 3635 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3636 return; 3637 3638 rcu_read_lock(); 3639 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3640 if (!IS_ERR_OR_NULL(sta)) 3641 ieee80211_sta_eosp(sta); 3642 rcu_read_unlock(); 3643 } 3644 3645 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3646 struct iwl_mvm_sta *mvmsta, bool disable) 3647 { 3648 struct iwl_mvm_add_sta_cmd cmd = { 3649 .add_modify = STA_MODE_MODIFY, 3650 .sta_id = mvmsta->sta_id, 3651 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3652 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3653 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3654 }; 3655 int ret; 3656 3657 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3658 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3659 if (ret) 3660 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3661 } 3662 3663 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3664 struct ieee80211_sta *sta, 3665 bool disable) 3666 { 3667 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3668 3669 spin_lock_bh(&mvm_sta->lock); 3670 3671 if (mvm_sta->disable_tx == disable) { 3672 spin_unlock_bh(&mvm_sta->lock); 3673 return; 3674 } 3675 3676 mvm_sta->disable_tx = disable; 3677 3678 /* 3679 * Tell mac80211 to start/stop queuing tx for this station, 3680 * but don't stop queuing if there are still pending frames 3681 * for this station. 3682 */ 3683 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) 3684 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3685 3686 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3687 3688 spin_unlock_bh(&mvm_sta->lock); 3689 } 3690 3691 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3692 struct iwl_mvm_vif *mvmvif, 3693 struct iwl_mvm_int_sta *sta, 3694 bool disable) 3695 { 3696 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3697 struct iwl_mvm_add_sta_cmd cmd = { 3698 .add_modify = STA_MODE_MODIFY, 3699 .sta_id = sta->sta_id, 3700 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3701 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3702 .mac_id_n_color = cpu_to_le32(id), 3703 }; 3704 int ret; 3705 3706 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3707 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3708 if (ret) 3709 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3710 } 3711 3712 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3713 struct iwl_mvm_vif *mvmvif, 3714 bool disable) 3715 { 3716 struct ieee80211_sta *sta; 3717 struct iwl_mvm_sta *mvm_sta; 3718 int i; 3719 3720 lockdep_assert_held(&mvm->mutex); 3721 3722 /* Block/unblock all the stations of the given mvmvif */ 3723 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3724 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3725 lockdep_is_held(&mvm->mutex)); 3726 if (IS_ERR_OR_NULL(sta)) 3727 continue; 3728 3729 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3730 if (mvm_sta->mac_id_n_color != 3731 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3732 continue; 3733 3734 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3735 } 3736 3737 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3738 return; 3739 3740 /* Need to block/unblock also multicast station */ 3741 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3742 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3743 &mvmvif->mcast_sta, disable); 3744 3745 /* 3746 * Only unblock the broadcast station (FW blocks it for immediate 3747 * quiet, not the driver) 3748 */ 3749 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3750 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3751 &mvmvif->bcast_sta, disable); 3752 } 3753 3754 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3755 { 3756 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3757 struct iwl_mvm_sta *mvmsta; 3758 3759 rcu_read_lock(); 3760 3761 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3762 3763 if (!WARN_ON(!mvmsta)) 3764 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3765 3766 rcu_read_unlock(); 3767 } 3768 3769 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3770 { 3771 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3772 3773 /* 3774 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 3775 * to align the wrap around of ssn so we compare relevant values. 3776 */ 3777 if (mvm->trans->cfg->gen2) 3778 sn &= 0xff; 3779 3780 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3781 } 3782