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 STA_FLG_RTS_MIMO_PROT), 126 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 127 }; 128 int ret; 129 u32 status; 130 u32 agg_size = 0, mpdu_dens = 0; 131 132 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 133 add_sta_cmd.station_type = mvm_sta->sta_type; 134 135 if (!update || (flags & STA_MODIFY_QUEUES)) { 136 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 137 138 if (!iwl_mvm_has_new_tx_api(mvm)) { 139 add_sta_cmd.tfd_queue_msk = 140 cpu_to_le32(mvm_sta->tfd_queue_msk); 141 142 if (flags & STA_MODIFY_QUEUES) 143 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; 144 } else { 145 WARN_ON(flags & STA_MODIFY_QUEUES); 146 } 147 } 148 149 switch (sta->bandwidth) { 150 case IEEE80211_STA_RX_BW_160: 151 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 152 /* fall through */ 153 case IEEE80211_STA_RX_BW_80: 154 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 155 /* fall through */ 156 case IEEE80211_STA_RX_BW_40: 157 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 158 /* fall through */ 159 case IEEE80211_STA_RX_BW_20: 160 if (sta->ht_cap.ht_supported) 161 add_sta_cmd.station_flags |= 162 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 163 break; 164 } 165 166 switch (sta->rx_nss) { 167 case 1: 168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 169 break; 170 case 2: 171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 172 break; 173 case 3 ... 8: 174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 175 break; 176 } 177 178 switch (sta->smps_mode) { 179 case IEEE80211_SMPS_AUTOMATIC: 180 case IEEE80211_SMPS_NUM_MODES: 181 WARN_ON(1); 182 break; 183 case IEEE80211_SMPS_STATIC: 184 /* override NSS */ 185 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 186 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 187 break; 188 case IEEE80211_SMPS_DYNAMIC: 189 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 190 break; 191 case IEEE80211_SMPS_OFF: 192 /* nothing */ 193 break; 194 } 195 196 if (sta->ht_cap.ht_supported) { 197 add_sta_cmd.station_flags_msk |= 198 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 199 STA_FLG_AGG_MPDU_DENS_MSK); 200 201 mpdu_dens = sta->ht_cap.ampdu_density; 202 } 203 204 if (sta->vht_cap.vht_supported) { 205 agg_size = sta->vht_cap.cap & 206 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 207 agg_size >>= 208 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 209 } else if (sta->ht_cap.ht_supported) { 210 agg_size = sta->ht_cap.ampdu_factor; 211 } 212 213 add_sta_cmd.station_flags |= 214 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 215 add_sta_cmd.station_flags |= 216 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 217 if (mvm_sta->associated) 218 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid); 219 220 if (sta->wme) { 221 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS; 222 223 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 224 add_sta_cmd.uapsd_acs |= BIT(AC_BK); 225 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 226 add_sta_cmd.uapsd_acs |= BIT(AC_BE); 227 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 228 add_sta_cmd.uapsd_acs |= BIT(AC_VI); 229 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 230 add_sta_cmd.uapsd_acs |= BIT(AC_VO); 231 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4; 232 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128; 233 } 234 235 status = ADD_STA_SUCCESS; 236 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 237 iwl_mvm_add_sta_cmd_size(mvm), 238 &add_sta_cmd, &status); 239 if (ret) 240 return ret; 241 242 switch (status & IWL_ADD_STA_STATUS_MASK) { 243 case ADD_STA_SUCCESS: 244 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 245 break; 246 default: 247 ret = -EIO; 248 IWL_ERR(mvm, "ADD_STA failed\n"); 249 break; 250 } 251 252 return ret; 253 } 254 255 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t) 256 { 257 struct iwl_mvm_baid_data *data = 258 from_timer(data, t, session_timer); 259 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr; 260 struct iwl_mvm_baid_data *ba_data; 261 struct ieee80211_sta *sta; 262 struct iwl_mvm_sta *mvm_sta; 263 unsigned long timeout; 264 265 rcu_read_lock(); 266 267 ba_data = rcu_dereference(*rcu_ptr); 268 269 if (WARN_ON(!ba_data)) 270 goto unlock; 271 272 if (!ba_data->timeout) 273 goto unlock; 274 275 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 276 if (time_is_after_jiffies(timeout)) { 277 mod_timer(&ba_data->session_timer, timeout); 278 goto unlock; 279 } 280 281 /* Timer expired */ 282 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 283 284 /* 285 * sta should be valid unless the following happens: 286 * The firmware asserts which triggers a reconfig flow, but 287 * the reconfig fails before we set the pointer to sta into 288 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 289 * A-MDPU and hence the timer continues to run. Then, the 290 * timer expires and sta is NULL. 291 */ 292 if (!sta) 293 goto unlock; 294 295 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 296 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 297 sta->addr, ba_data->tid); 298 unlock: 299 rcu_read_unlock(); 300 } 301 302 /* Disable aggregations for a bitmap of TIDs for a given station */ 303 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 304 unsigned long disable_agg_tids, 305 bool remove_queue) 306 { 307 struct iwl_mvm_add_sta_cmd cmd = {}; 308 struct ieee80211_sta *sta; 309 struct iwl_mvm_sta *mvmsta; 310 u32 status; 311 u8 sta_id; 312 int ret; 313 314 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 315 return -EINVAL; 316 317 spin_lock_bh(&mvm->queue_info_lock); 318 sta_id = mvm->queue_info[queue].ra_sta_id; 319 spin_unlock_bh(&mvm->queue_info_lock); 320 321 rcu_read_lock(); 322 323 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 324 325 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 326 rcu_read_unlock(); 327 return -EINVAL; 328 } 329 330 mvmsta = iwl_mvm_sta_from_mac80211(sta); 331 332 mvmsta->tid_disable_agg |= disable_agg_tids; 333 334 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 335 cmd.sta_id = mvmsta->sta_id; 336 cmd.add_modify = STA_MODE_MODIFY; 337 cmd.modify_mask = STA_MODIFY_QUEUES; 338 if (disable_agg_tids) 339 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 340 if (remove_queue) 341 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 342 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 343 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 344 345 rcu_read_unlock(); 346 347 /* Notify FW of queue removal from the STA queues */ 348 status = ADD_STA_SUCCESS; 349 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 350 iwl_mvm_add_sta_cmd_size(mvm), 351 &cmd, &status); 352 353 return ret; 354 } 355 356 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 357 { 358 struct ieee80211_sta *sta; 359 struct iwl_mvm_sta *mvmsta; 360 unsigned long tid_bitmap; 361 unsigned long agg_tids = 0; 362 u8 sta_id; 363 int tid; 364 365 lockdep_assert_held(&mvm->mutex); 366 367 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 368 return -EINVAL; 369 370 spin_lock_bh(&mvm->queue_info_lock); 371 sta_id = mvm->queue_info[queue].ra_sta_id; 372 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 373 spin_unlock_bh(&mvm->queue_info_lock); 374 375 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 376 lockdep_is_held(&mvm->mutex)); 377 378 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 379 return -EINVAL; 380 381 mvmsta = iwl_mvm_sta_from_mac80211(sta); 382 383 spin_lock_bh(&mvmsta->lock); 384 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 385 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 386 agg_tids |= BIT(tid); 387 } 388 spin_unlock_bh(&mvmsta->lock); 389 390 return agg_tids; 391 } 392 393 /* 394 * Remove a queue from a station's resources. 395 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 396 * doesn't disable the queue 397 */ 398 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 399 { 400 struct ieee80211_sta *sta; 401 struct iwl_mvm_sta *mvmsta; 402 unsigned long tid_bitmap; 403 unsigned long disable_agg_tids = 0; 404 u8 sta_id; 405 int tid; 406 407 lockdep_assert_held(&mvm->mutex); 408 409 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 410 return -EINVAL; 411 412 spin_lock_bh(&mvm->queue_info_lock); 413 sta_id = mvm->queue_info[queue].ra_sta_id; 414 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 415 spin_unlock_bh(&mvm->queue_info_lock); 416 417 rcu_read_lock(); 418 419 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 420 421 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 422 rcu_read_unlock(); 423 return 0; 424 } 425 426 mvmsta = iwl_mvm_sta_from_mac80211(sta); 427 428 spin_lock_bh(&mvmsta->lock); 429 /* Unmap MAC queues and TIDs from this queue */ 430 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 431 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 432 disable_agg_tids |= BIT(tid); 433 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 434 } 435 436 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 437 spin_unlock_bh(&mvmsta->lock); 438 439 rcu_read_unlock(); 440 441 return disable_agg_tids; 442 } 443 444 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 445 bool same_sta) 446 { 447 struct iwl_mvm_sta *mvmsta; 448 u8 txq_curr_ac, sta_id, tid; 449 unsigned long disable_agg_tids = 0; 450 int ret; 451 452 lockdep_assert_held(&mvm->mutex); 453 454 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 455 return -EINVAL; 456 457 spin_lock_bh(&mvm->queue_info_lock); 458 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 459 sta_id = mvm->queue_info[queue].ra_sta_id; 460 tid = mvm->queue_info[queue].txq_tid; 461 spin_unlock_bh(&mvm->queue_info_lock); 462 463 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 464 if (WARN_ON(!mvmsta)) 465 return -EINVAL; 466 467 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 468 /* Disable the queue */ 469 if (disable_agg_tids) 470 iwl_mvm_invalidate_sta_queue(mvm, queue, 471 disable_agg_tids, false); 472 473 ret = iwl_mvm_disable_txq(mvm, queue, 474 mvmsta->vif->hw_queue[txq_curr_ac], 475 tid, 0); 476 if (ret) { 477 /* Re-mark the inactive queue as inactive */ 478 spin_lock_bh(&mvm->queue_info_lock); 479 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 480 spin_unlock_bh(&mvm->queue_info_lock); 481 IWL_ERR(mvm, 482 "Failed to free inactive queue %d (ret=%d)\n", 483 queue, ret); 484 485 return ret; 486 } 487 488 /* If TXQ is allocated to another STA, update removal in FW */ 489 if (!same_sta) 490 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 491 492 return 0; 493 } 494 495 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 496 unsigned long tfd_queue_mask, u8 ac) 497 { 498 int queue = 0; 499 u8 ac_to_queue[IEEE80211_NUM_ACS]; 500 int i; 501 502 lockdep_assert_held(&mvm->queue_info_lock); 503 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 504 return -EINVAL; 505 506 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 507 508 /* See what ACs the existing queues for this STA have */ 509 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 510 /* Only DATA queues can be shared */ 511 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 512 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 513 continue; 514 515 /* Don't try and take queues being reconfigured */ 516 if (mvm->queue_info[queue].status == 517 IWL_MVM_QUEUE_RECONFIGURING) 518 continue; 519 520 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 521 } 522 523 /* 524 * The queue to share is chosen only from DATA queues as follows (in 525 * descending priority): 526 * 1. An AC_BE queue 527 * 2. Same AC queue 528 * 3. Highest AC queue that is lower than new AC 529 * 4. Any existing AC (there always is at least 1 DATA queue) 530 */ 531 532 /* Priority 1: An AC_BE queue */ 533 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 534 queue = ac_to_queue[IEEE80211_AC_BE]; 535 /* Priority 2: Same AC queue */ 536 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 537 queue = ac_to_queue[ac]; 538 /* Priority 3a: If new AC is VO and VI exists - use VI */ 539 else if (ac == IEEE80211_AC_VO && 540 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 541 queue = ac_to_queue[IEEE80211_AC_VI]; 542 /* Priority 3b: No BE so only AC less than the new one is BK */ 543 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 544 queue = ac_to_queue[IEEE80211_AC_BK]; 545 /* Priority 4a: No BE nor BK - use VI if exists */ 546 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 547 queue = ac_to_queue[IEEE80211_AC_VI]; 548 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 549 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 550 queue = ac_to_queue[IEEE80211_AC_VO]; 551 552 /* Make sure queue found (or not) is legal */ 553 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 554 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 555 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 556 IWL_ERR(mvm, "No DATA queues available to share\n"); 557 return -ENOSPC; 558 } 559 560 /* Make sure the queue isn't in the middle of being reconfigured */ 561 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 562 IWL_ERR(mvm, 563 "TXQ %d is in the middle of re-config - try again\n", 564 queue); 565 return -EBUSY; 566 } 567 568 return queue; 569 } 570 571 /* 572 * If a given queue has a higher AC than the TID stream that is being compared 573 * to, the queue needs to be redirected to the lower AC. This function does that 574 * in such a case, otherwise - if no redirection required - it does nothing, 575 * unless the %force param is true. 576 */ 577 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 578 int ac, int ssn, unsigned int wdg_timeout, 579 bool force) 580 { 581 struct iwl_scd_txq_cfg_cmd cmd = { 582 .scd_queue = queue, 583 .action = SCD_CFG_DISABLE_QUEUE, 584 }; 585 bool shared_queue; 586 unsigned long mq; 587 int ret; 588 589 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 590 return -EINVAL; 591 592 /* 593 * If the AC is lower than current one - FIFO needs to be redirected to 594 * the lowest one of the streams in the queue. Check if this is needed 595 * here. 596 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 597 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 598 * we need to check if the numerical value of X is LARGER than of Y. 599 */ 600 spin_lock_bh(&mvm->queue_info_lock); 601 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 602 spin_unlock_bh(&mvm->queue_info_lock); 603 604 IWL_DEBUG_TX_QUEUES(mvm, 605 "No redirection needed on TXQ #%d\n", 606 queue); 607 return 0; 608 } 609 610 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 611 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 612 cmd.tid = mvm->queue_info[queue].txq_tid; 613 mq = mvm->hw_queue_to_mac80211[queue]; 614 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 615 spin_unlock_bh(&mvm->queue_info_lock); 616 617 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 618 queue, iwl_mvm_ac_to_tx_fifo[ac]); 619 620 /* Stop MAC queues and wait for this queue to empty */ 621 iwl_mvm_stop_mac_queues(mvm, mq); 622 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 623 if (ret) { 624 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 625 queue); 626 ret = -EIO; 627 goto out; 628 } 629 630 /* Before redirecting the queue we need to de-activate it */ 631 iwl_trans_txq_disable(mvm->trans, queue, false); 632 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 633 if (ret) 634 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 635 ret); 636 637 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 638 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 639 640 /* Update the TID "owner" of the queue */ 641 spin_lock_bh(&mvm->queue_info_lock); 642 mvm->queue_info[queue].txq_tid = tid; 643 spin_unlock_bh(&mvm->queue_info_lock); 644 645 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 646 647 /* Redirect to lower AC */ 648 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 649 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn); 650 651 /* Update AC marking of the queue */ 652 spin_lock_bh(&mvm->queue_info_lock); 653 mvm->queue_info[queue].mac80211_ac = ac; 654 spin_unlock_bh(&mvm->queue_info_lock); 655 656 /* 657 * Mark queue as shared in transport if shared 658 * Note this has to be done after queue enablement because enablement 659 * can also set this value, and there is no indication there to shared 660 * queues 661 */ 662 if (shared_queue) 663 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 664 665 out: 666 /* Continue using the MAC queues */ 667 iwl_mvm_start_mac_queues(mvm, mq); 668 669 return ret; 670 } 671 672 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 673 struct ieee80211_sta *sta, u8 ac, 674 int tid) 675 { 676 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 677 unsigned int wdg_timeout = 678 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 679 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 680 int queue = -1; 681 682 lockdep_assert_held(&mvm->mutex); 683 684 IWL_DEBUG_TX_QUEUES(mvm, 685 "Allocating queue for sta %d on tid %d\n", 686 mvmsta->sta_id, tid); 687 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid, 688 wdg_timeout); 689 if (queue < 0) 690 return queue; 691 692 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 693 694 spin_lock_bh(&mvmsta->lock); 695 mvmsta->tid_data[tid].txq_id = queue; 696 mvmsta->tid_data[tid].is_tid_active = true; 697 spin_unlock_bh(&mvmsta->lock); 698 699 return 0; 700 } 701 702 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 703 struct ieee80211_sta *sta, u8 ac, int tid, 704 struct ieee80211_hdr *hdr) 705 { 706 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 707 struct iwl_trans_txq_scd_cfg cfg = { 708 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 709 .sta_id = mvmsta->sta_id, 710 .tid = tid, 711 .frame_limit = IWL_FRAME_LIMIT, 712 }; 713 unsigned int wdg_timeout = 714 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 715 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 716 int queue = -1; 717 bool using_inactive_queue = false, same_sta = false; 718 unsigned long disable_agg_tids = 0; 719 enum iwl_mvm_agg_state queue_state; 720 bool shared_queue = false, inc_ssn; 721 int ssn; 722 unsigned long tfd_queue_mask; 723 int ret; 724 725 lockdep_assert_held(&mvm->mutex); 726 727 if (iwl_mvm_has_new_tx_api(mvm)) 728 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 729 730 spin_lock_bh(&mvmsta->lock); 731 tfd_queue_mask = mvmsta->tfd_queue_msk; 732 spin_unlock_bh(&mvmsta->lock); 733 734 spin_lock_bh(&mvm->queue_info_lock); 735 736 /* 737 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 738 * exists 739 */ 740 if (!ieee80211_is_data_qos(hdr->frame_control) || 741 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 742 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 743 IWL_MVM_DQA_MIN_MGMT_QUEUE, 744 IWL_MVM_DQA_MAX_MGMT_QUEUE); 745 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 746 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 747 queue); 748 749 /* If no such queue is found, we'll use a DATA queue instead */ 750 } 751 752 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 753 (mvm->queue_info[mvmsta->reserved_queue].status == 754 IWL_MVM_QUEUE_RESERVED || 755 mvm->queue_info[mvmsta->reserved_queue].status == 756 IWL_MVM_QUEUE_INACTIVE)) { 757 queue = mvmsta->reserved_queue; 758 mvm->queue_info[queue].reserved = true; 759 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 760 } 761 762 if (queue < 0) 763 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 764 IWL_MVM_DQA_MIN_DATA_QUEUE, 765 IWL_MVM_DQA_MAX_DATA_QUEUE); 766 767 /* 768 * Check if this queue is already allocated but inactive. 769 * In such a case, we'll need to first free this queue before enabling 770 * it again, so we'll mark it as reserved to make sure no new traffic 771 * arrives on it 772 */ 773 if (queue > 0 && 774 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 775 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 776 using_inactive_queue = true; 777 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 778 IWL_DEBUG_TX_QUEUES(mvm, 779 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 780 queue, mvmsta->sta_id, tid); 781 } 782 783 /* No free queue - we'll have to share */ 784 if (queue <= 0) { 785 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 786 if (queue > 0) { 787 shared_queue = true; 788 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 789 } 790 } 791 792 /* 793 * Mark TXQ as ready, even though it hasn't been fully configured yet, 794 * to make sure no one else takes it. 795 * This will allow avoiding re-acquiring the lock at the end of the 796 * configuration. On error we'll mark it back as free. 797 */ 798 if ((queue > 0) && !shared_queue) 799 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 800 801 spin_unlock_bh(&mvm->queue_info_lock); 802 803 /* This shouldn't happen - out of queues */ 804 if (WARN_ON(queue <= 0)) { 805 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 806 tid, cfg.sta_id); 807 return queue; 808 } 809 810 /* 811 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 812 * but for configuring the SCD to send A-MPDUs we need to mark the queue 813 * as aggregatable. 814 * Mark all DATA queues as allowing to be aggregated at some point 815 */ 816 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 817 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 818 819 /* 820 * If this queue was previously inactive (idle) - we need to free it 821 * first 822 */ 823 if (using_inactive_queue) { 824 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 825 if (ret) 826 return ret; 827 } 828 829 IWL_DEBUG_TX_QUEUES(mvm, 830 "Allocating %squeue #%d to sta %d on tid %d\n", 831 shared_queue ? "shared " : "", queue, 832 mvmsta->sta_id, tid); 833 834 if (shared_queue) { 835 /* Disable any open aggs on this queue */ 836 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 837 838 if (disable_agg_tids) { 839 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 840 queue); 841 iwl_mvm_invalidate_sta_queue(mvm, queue, 842 disable_agg_tids, false); 843 } 844 } 845 846 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 847 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue, 848 ssn, &cfg, wdg_timeout); 849 if (inc_ssn) { 850 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 851 le16_add_cpu(&hdr->seq_ctrl, 0x10); 852 } 853 854 /* 855 * Mark queue as shared in transport if shared 856 * Note this has to be done after queue enablement because enablement 857 * can also set this value, and there is no indication there to shared 858 * queues 859 */ 860 if (shared_queue) 861 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 862 863 spin_lock_bh(&mvmsta->lock); 864 /* 865 * This looks racy, but it is not. We have only one packet for 866 * this ra/tid in our Tx path since we stop the Qdisc when we 867 * need to allocate a new TFD queue. 868 */ 869 if (inc_ssn) 870 mvmsta->tid_data[tid].seq_number += 0x10; 871 mvmsta->tid_data[tid].txq_id = queue; 872 mvmsta->tid_data[tid].is_tid_active = true; 873 mvmsta->tfd_queue_msk |= BIT(queue); 874 queue_state = mvmsta->tid_data[tid].state; 875 876 if (mvmsta->reserved_queue == queue) 877 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 878 spin_unlock_bh(&mvmsta->lock); 879 880 if (!shared_queue) { 881 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 882 if (ret) 883 goto out_err; 884 885 /* If we need to re-enable aggregations... */ 886 if (queue_state == IWL_AGG_ON) { 887 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 888 if (ret) 889 goto out_err; 890 } 891 } else { 892 /* Redirect queue, if needed */ 893 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 894 wdg_timeout, false); 895 if (ret) 896 goto out_err; 897 } 898 899 return 0; 900 901 out_err: 902 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 903 904 return ret; 905 } 906 907 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 908 { 909 struct iwl_scd_txq_cfg_cmd cmd = { 910 .scd_queue = queue, 911 .action = SCD_CFG_UPDATE_QUEUE_TID, 912 }; 913 int tid; 914 unsigned long tid_bitmap; 915 int ret; 916 917 lockdep_assert_held(&mvm->mutex); 918 919 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 920 return; 921 922 spin_lock_bh(&mvm->queue_info_lock); 923 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 924 spin_unlock_bh(&mvm->queue_info_lock); 925 926 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 927 return; 928 929 /* Find any TID for queue */ 930 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 931 cmd.tid = tid; 932 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 933 934 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 935 if (ret) { 936 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 937 queue, ret); 938 return; 939 } 940 941 spin_lock_bh(&mvm->queue_info_lock); 942 mvm->queue_info[queue].txq_tid = tid; 943 spin_unlock_bh(&mvm->queue_info_lock); 944 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 945 queue, tid); 946 } 947 948 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 949 { 950 struct ieee80211_sta *sta; 951 struct iwl_mvm_sta *mvmsta; 952 u8 sta_id; 953 int tid = -1; 954 unsigned long tid_bitmap; 955 unsigned int wdg_timeout; 956 int ssn; 957 int ret = true; 958 959 /* queue sharing is disabled on new TX path */ 960 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 961 return; 962 963 lockdep_assert_held(&mvm->mutex); 964 965 spin_lock_bh(&mvm->queue_info_lock); 966 sta_id = mvm->queue_info[queue].ra_sta_id; 967 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 968 spin_unlock_bh(&mvm->queue_info_lock); 969 970 /* Find TID for queue, and make sure it is the only one on the queue */ 971 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 972 if (tid_bitmap != BIT(tid)) { 973 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 974 queue, tid_bitmap); 975 return; 976 } 977 978 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 979 tid); 980 981 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 982 lockdep_is_held(&mvm->mutex)); 983 984 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 985 return; 986 987 mvmsta = iwl_mvm_sta_from_mac80211(sta); 988 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 989 990 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 991 992 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 993 tid_to_mac80211_ac[tid], ssn, 994 wdg_timeout, true); 995 if (ret) { 996 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 997 return; 998 } 999 1000 /* If aggs should be turned back on - do it */ 1001 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1002 struct iwl_mvm_add_sta_cmd cmd = {0}; 1003 1004 mvmsta->tid_disable_agg &= ~BIT(tid); 1005 1006 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1007 cmd.sta_id = mvmsta->sta_id; 1008 cmd.add_modify = STA_MODE_MODIFY; 1009 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1010 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1011 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1012 1013 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1014 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1015 if (!ret) { 1016 IWL_DEBUG_TX_QUEUES(mvm, 1017 "TXQ #%d is now aggregated again\n", 1018 queue); 1019 1020 /* Mark queue intenally as aggregating again */ 1021 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1022 } 1023 } 1024 1025 spin_lock_bh(&mvm->queue_info_lock); 1026 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1027 spin_unlock_bh(&mvm->queue_info_lock); 1028 } 1029 1030 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1031 { 1032 if (tid == IWL_MAX_TID_COUNT) 1033 return IEEE80211_AC_VO; /* MGMT */ 1034 1035 return tid_to_mac80211_ac[tid]; 1036 } 1037 1038 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 1039 struct ieee80211_sta *sta, int tid) 1040 { 1041 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1042 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1043 struct sk_buff *skb; 1044 struct ieee80211_hdr *hdr; 1045 struct sk_buff_head deferred_tx; 1046 u8 mac_queue; 1047 bool no_queue = false; /* Marks if there is a problem with the queue */ 1048 u8 ac; 1049 1050 lockdep_assert_held(&mvm->mutex); 1051 1052 skb = skb_peek(&tid_data->deferred_tx_frames); 1053 if (!skb) 1054 return; 1055 hdr = (void *)skb->data; 1056 1057 ac = iwl_mvm_tid_to_ac_queue(tid); 1058 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1059 1060 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE && 1061 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1062 IWL_ERR(mvm, 1063 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1064 mvmsta->sta_id, tid); 1065 1066 /* 1067 * Mark queue as problematic so later the deferred traffic is 1068 * freed, as we can do nothing with it 1069 */ 1070 no_queue = true; 1071 } 1072 1073 __skb_queue_head_init(&deferred_tx); 1074 1075 /* Disable bottom-halves when entering TX path */ 1076 local_bh_disable(); 1077 spin_lock(&mvmsta->lock); 1078 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1079 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1080 spin_unlock(&mvmsta->lock); 1081 1082 while ((skb = __skb_dequeue(&deferred_tx))) 1083 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1084 ieee80211_free_txskb(mvm->hw, skb); 1085 local_bh_enable(); 1086 1087 /* Wake queue */ 1088 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1089 } 1090 1091 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1092 { 1093 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1094 add_stream_wk); 1095 struct ieee80211_sta *sta; 1096 struct iwl_mvm_sta *mvmsta; 1097 unsigned long deferred_tid_traffic; 1098 int queue, sta_id, tid; 1099 1100 /* Check inactivity of queues */ 1101 iwl_mvm_inactivity_check(mvm); 1102 1103 mutex_lock(&mvm->mutex); 1104 1105 /* No queue reconfiguration in TVQM mode */ 1106 if (iwl_mvm_has_new_tx_api(mvm)) 1107 goto alloc_queues; 1108 1109 /* Reconfigure queues requiring reconfiguation */ 1110 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) { 1111 bool reconfig; 1112 bool change_owner; 1113 1114 spin_lock_bh(&mvm->queue_info_lock); 1115 reconfig = (mvm->queue_info[queue].status == 1116 IWL_MVM_QUEUE_RECONFIGURING); 1117 1118 /* 1119 * We need to take into account a situation in which a TXQ was 1120 * allocated to TID x, and then turned shared by adding TIDs y 1121 * and z. If TID x becomes inactive and is removed from the TXQ, 1122 * ownership must be given to one of the remaining TIDs. 1123 * This is mainly because if TID x continues - a new queue can't 1124 * be allocated for it as long as it is an owner of another TXQ. 1125 */ 1126 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1127 BIT(mvm->queue_info[queue].txq_tid)) && 1128 (mvm->queue_info[queue].status == 1129 IWL_MVM_QUEUE_SHARED); 1130 spin_unlock_bh(&mvm->queue_info_lock); 1131 1132 if (reconfig) 1133 iwl_mvm_unshare_queue(mvm, queue); 1134 else if (change_owner) 1135 iwl_mvm_change_queue_owner(mvm, queue); 1136 } 1137 1138 alloc_queues: 1139 /* Go over all stations with deferred traffic */ 1140 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1141 IWL_MVM_STATION_COUNT) { 1142 clear_bit(sta_id, mvm->sta_deferred_frames); 1143 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1144 lockdep_is_held(&mvm->mutex)); 1145 if (IS_ERR_OR_NULL(sta)) 1146 continue; 1147 1148 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1149 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1150 1151 for_each_set_bit(tid, &deferred_tid_traffic, 1152 IWL_MAX_TID_COUNT + 1) 1153 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1154 } 1155 1156 mutex_unlock(&mvm->mutex); 1157 } 1158 1159 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1160 struct ieee80211_sta *sta, 1161 enum nl80211_iftype vif_type) 1162 { 1163 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1164 int queue; 1165 bool using_inactive_queue = false, same_sta = false; 1166 1167 /* queue reserving is disabled on new TX path */ 1168 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1169 return 0; 1170 1171 /* 1172 * Check for inactive queues, so we don't reach a situation where we 1173 * can't add a STA due to a shortage in queues that doesn't really exist 1174 */ 1175 iwl_mvm_inactivity_check(mvm); 1176 1177 spin_lock_bh(&mvm->queue_info_lock); 1178 1179 /* Make sure we have free resources for this STA */ 1180 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1181 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1182 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1183 IWL_MVM_QUEUE_FREE)) 1184 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1185 else 1186 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1187 IWL_MVM_DQA_MIN_DATA_QUEUE, 1188 IWL_MVM_DQA_MAX_DATA_QUEUE); 1189 if (queue < 0) { 1190 spin_unlock_bh(&mvm->queue_info_lock); 1191 IWL_ERR(mvm, "No available queues for new station\n"); 1192 return -ENOSPC; 1193 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 1194 /* 1195 * If this queue is already allocated but inactive we'll need to 1196 * first free this queue before enabling it again, we'll mark 1197 * it as reserved to make sure no new traffic arrives on it 1198 */ 1199 using_inactive_queue = true; 1200 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 1201 } 1202 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1203 1204 spin_unlock_bh(&mvm->queue_info_lock); 1205 1206 mvmsta->reserved_queue = queue; 1207 1208 if (using_inactive_queue) 1209 iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 1210 1211 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1212 queue, mvmsta->sta_id); 1213 1214 return 0; 1215 } 1216 1217 /* 1218 * In DQA mode, after a HW restart the queues should be allocated as before, in 1219 * order to avoid race conditions when there are shared queues. This function 1220 * does the re-mapping and queue allocation. 1221 * 1222 * Note that re-enabling aggregations isn't done in this function. 1223 */ 1224 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1225 struct iwl_mvm_sta *mvm_sta) 1226 { 1227 unsigned int wdg_timeout = 1228 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1229 int i; 1230 struct iwl_trans_txq_scd_cfg cfg = { 1231 .sta_id = mvm_sta->sta_id, 1232 .frame_limit = IWL_FRAME_LIMIT, 1233 }; 1234 1235 /* Make sure reserved queue is still marked as such (if allocated) */ 1236 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1237 mvm->queue_info[mvm_sta->reserved_queue].status = 1238 IWL_MVM_QUEUE_RESERVED; 1239 1240 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1241 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1242 int txq_id = tid_data->txq_id; 1243 int ac; 1244 u8 mac_queue; 1245 1246 if (txq_id == IWL_MVM_INVALID_QUEUE) 1247 continue; 1248 1249 skb_queue_head_init(&tid_data->deferred_tx_frames); 1250 1251 ac = tid_to_mac80211_ac[i]; 1252 mac_queue = mvm_sta->vif->hw_queue[ac]; 1253 1254 if (iwl_mvm_has_new_tx_api(mvm)) { 1255 IWL_DEBUG_TX_QUEUES(mvm, 1256 "Re-mapping sta %d tid %d\n", 1257 mvm_sta->sta_id, i); 1258 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, 1259 mvm_sta->sta_id, 1260 i, wdg_timeout); 1261 tid_data->txq_id = txq_id; 1262 1263 /* 1264 * Since we don't set the seq number after reset, and HW 1265 * sets it now, FW reset will cause the seq num to start 1266 * at 0 again, so driver will need to update it 1267 * internally as well, so it keeps in sync with real val 1268 */ 1269 tid_data->seq_number = 0; 1270 } else { 1271 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1272 1273 cfg.tid = i; 1274 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1275 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1276 txq_id == 1277 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1278 1279 IWL_DEBUG_TX_QUEUES(mvm, 1280 "Re-mapping sta %d tid %d to queue %d\n", 1281 mvm_sta->sta_id, i, txq_id); 1282 1283 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg, 1284 wdg_timeout); 1285 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1286 } 1287 } 1288 } 1289 1290 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1291 struct iwl_mvm_int_sta *sta, 1292 const u8 *addr, 1293 u16 mac_id, u16 color) 1294 { 1295 struct iwl_mvm_add_sta_cmd cmd; 1296 int ret; 1297 u32 status = ADD_STA_SUCCESS; 1298 1299 lockdep_assert_held(&mvm->mutex); 1300 1301 memset(&cmd, 0, sizeof(cmd)); 1302 cmd.sta_id = sta->sta_id; 1303 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1304 color)); 1305 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1306 cmd.station_type = sta->type; 1307 1308 if (!iwl_mvm_has_new_tx_api(mvm)) 1309 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1310 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1311 1312 if (addr) 1313 memcpy(cmd.addr, addr, ETH_ALEN); 1314 1315 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1316 iwl_mvm_add_sta_cmd_size(mvm), 1317 &cmd, &status); 1318 if (ret) 1319 return ret; 1320 1321 switch (status & IWL_ADD_STA_STATUS_MASK) { 1322 case ADD_STA_SUCCESS: 1323 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1324 return 0; 1325 default: 1326 ret = -EIO; 1327 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1328 status); 1329 break; 1330 } 1331 return ret; 1332 } 1333 1334 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1335 struct ieee80211_vif *vif, 1336 struct ieee80211_sta *sta) 1337 { 1338 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1339 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1340 struct iwl_mvm_rxq_dup_data *dup_data; 1341 int i, ret, sta_id; 1342 bool sta_update = false; 1343 unsigned int sta_flags = 0; 1344 1345 lockdep_assert_held(&mvm->mutex); 1346 1347 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1348 sta_id = iwl_mvm_find_free_sta_id(mvm, 1349 ieee80211_vif_type_p2p(vif)); 1350 else 1351 sta_id = mvm_sta->sta_id; 1352 1353 if (sta_id == IWL_MVM_INVALID_STA) 1354 return -ENOSPC; 1355 1356 spin_lock_init(&mvm_sta->lock); 1357 1358 /* if this is a HW restart re-alloc existing queues */ 1359 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1360 struct iwl_mvm_int_sta tmp_sta = { 1361 .sta_id = sta_id, 1362 .type = mvm_sta->sta_type, 1363 }; 1364 1365 /* 1366 * First add an empty station since allocating 1367 * a queue requires a valid station 1368 */ 1369 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1370 mvmvif->id, mvmvif->color); 1371 if (ret) 1372 goto err; 1373 1374 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1375 sta_update = true; 1376 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1377 goto update_fw; 1378 } 1379 1380 mvm_sta->sta_id = sta_id; 1381 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1382 mvmvif->color); 1383 mvm_sta->vif = vif; 1384 if (!mvm->trans->cfg->gen2) 1385 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1386 else 1387 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1388 mvm_sta->tx_protection = 0; 1389 mvm_sta->tt_tx_protection = false; 1390 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1391 1392 /* HW restart, don't assume the memory has been zeroed */ 1393 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1394 mvm_sta->tfd_queue_msk = 0; 1395 1396 /* for HW restart - reset everything but the sequence number */ 1397 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1398 u16 seq = mvm_sta->tid_data[i].seq_number; 1399 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1400 mvm_sta->tid_data[i].seq_number = seq; 1401 1402 /* 1403 * Mark all queues for this STA as unallocated and defer TX 1404 * frames until the queue is allocated 1405 */ 1406 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1407 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1408 } 1409 mvm_sta->deferred_traffic_tid_map = 0; 1410 mvm_sta->agg_tids = 0; 1411 1412 if (iwl_mvm_has_new_rx_api(mvm) && 1413 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1414 int q; 1415 1416 dup_data = kcalloc(mvm->trans->num_rx_queues, 1417 sizeof(*dup_data), GFP_KERNEL); 1418 if (!dup_data) 1419 return -ENOMEM; 1420 /* 1421 * Initialize all the last_seq values to 0xffff which can never 1422 * compare equal to the frame's seq_ctrl in the check in 1423 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1424 * number and fragmented packets don't reach that function. 1425 * 1426 * This thus allows receiving a packet with seqno 0 and the 1427 * retry bit set as the very first packet on a new TID. 1428 */ 1429 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1430 memset(dup_data[q].last_seq, 0xff, 1431 sizeof(dup_data[q].last_seq)); 1432 mvm_sta->dup_data = dup_data; 1433 } 1434 1435 if (!iwl_mvm_has_new_tx_api(mvm)) { 1436 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1437 ieee80211_vif_type_p2p(vif)); 1438 if (ret) 1439 goto err; 1440 } 1441 1442 /* 1443 * if rs is registered with mac80211, then "add station" will be handled 1444 * via the corresponding ops, otherwise need to notify rate scaling here 1445 */ 1446 if (iwl_mvm_has_tlc_offload(mvm)) 1447 iwl_mvm_rs_add_sta(mvm, mvm_sta); 1448 1449 update_fw: 1450 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1451 if (ret) 1452 goto err; 1453 1454 if (vif->type == NL80211_IFTYPE_STATION) { 1455 if (!sta->tdls) { 1456 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1457 mvmvif->ap_sta_id = sta_id; 1458 } else { 1459 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1460 } 1461 } 1462 1463 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1464 1465 return 0; 1466 1467 err: 1468 return ret; 1469 } 1470 1471 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1472 bool drain) 1473 { 1474 struct iwl_mvm_add_sta_cmd cmd = {}; 1475 int ret; 1476 u32 status; 1477 1478 lockdep_assert_held(&mvm->mutex); 1479 1480 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1481 cmd.sta_id = mvmsta->sta_id; 1482 cmd.add_modify = STA_MODE_MODIFY; 1483 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1484 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1485 1486 status = ADD_STA_SUCCESS; 1487 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1488 iwl_mvm_add_sta_cmd_size(mvm), 1489 &cmd, &status); 1490 if (ret) 1491 return ret; 1492 1493 switch (status & IWL_ADD_STA_STATUS_MASK) { 1494 case ADD_STA_SUCCESS: 1495 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1496 mvmsta->sta_id); 1497 break; 1498 default: 1499 ret = -EIO; 1500 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1501 mvmsta->sta_id); 1502 break; 1503 } 1504 1505 return ret; 1506 } 1507 1508 /* 1509 * Remove a station from the FW table. Before sending the command to remove 1510 * the station validate that the station is indeed known to the driver (sanity 1511 * only). 1512 */ 1513 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1514 { 1515 struct ieee80211_sta *sta; 1516 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1517 .sta_id = sta_id, 1518 }; 1519 int ret; 1520 1521 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1522 lockdep_is_held(&mvm->mutex)); 1523 1524 /* Note: internal stations are marked as error values */ 1525 if (!sta) { 1526 IWL_ERR(mvm, "Invalid station id\n"); 1527 return -EINVAL; 1528 } 1529 1530 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1531 sizeof(rm_sta_cmd), &rm_sta_cmd); 1532 if (ret) { 1533 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1534 return ret; 1535 } 1536 1537 return 0; 1538 } 1539 1540 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1541 struct ieee80211_vif *vif, 1542 struct iwl_mvm_sta *mvm_sta) 1543 { 1544 int ac; 1545 int i; 1546 1547 lockdep_assert_held(&mvm->mutex); 1548 1549 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1550 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1551 continue; 1552 1553 ac = iwl_mvm_tid_to_ac_queue(i); 1554 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1555 vif->hw_queue[ac], i, 0); 1556 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1557 } 1558 } 1559 1560 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1561 struct iwl_mvm_sta *mvm_sta) 1562 { 1563 int i; 1564 1565 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1566 u16 txq_id; 1567 int ret; 1568 1569 spin_lock_bh(&mvm_sta->lock); 1570 txq_id = mvm_sta->tid_data[i].txq_id; 1571 spin_unlock_bh(&mvm_sta->lock); 1572 1573 if (txq_id == IWL_MVM_INVALID_QUEUE) 1574 continue; 1575 1576 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1577 if (ret) 1578 return ret; 1579 } 1580 1581 return 0; 1582 } 1583 1584 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1585 struct ieee80211_vif *vif, 1586 struct ieee80211_sta *sta) 1587 { 1588 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1589 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1590 u8 sta_id = mvm_sta->sta_id; 1591 int ret; 1592 1593 lockdep_assert_held(&mvm->mutex); 1594 1595 if (iwl_mvm_has_new_rx_api(mvm)) 1596 kfree(mvm_sta->dup_data); 1597 1598 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1599 if (ret) 1600 return ret; 1601 1602 /* flush its queues here since we are freeing mvm_sta */ 1603 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1604 if (ret) 1605 return ret; 1606 if (iwl_mvm_has_new_tx_api(mvm)) { 1607 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1608 } else { 1609 u32 q_mask = mvm_sta->tfd_queue_msk; 1610 1611 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1612 q_mask); 1613 } 1614 if (ret) 1615 return ret; 1616 1617 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1618 1619 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1620 1621 /* If there is a TXQ still marked as reserved - free it */ 1622 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1623 u8 reserved_txq = mvm_sta->reserved_queue; 1624 enum iwl_mvm_queue_status *status; 1625 1626 /* 1627 * If no traffic has gone through the reserved TXQ - it 1628 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1629 * should be manually marked as free again 1630 */ 1631 spin_lock_bh(&mvm->queue_info_lock); 1632 status = &mvm->queue_info[reserved_txq].status; 1633 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1634 (*status != IWL_MVM_QUEUE_FREE), 1635 "sta_id %d reserved txq %d status %d", 1636 sta_id, reserved_txq, *status)) { 1637 spin_unlock_bh(&mvm->queue_info_lock); 1638 return -EINVAL; 1639 } 1640 1641 *status = IWL_MVM_QUEUE_FREE; 1642 spin_unlock_bh(&mvm->queue_info_lock); 1643 } 1644 1645 if (vif->type == NL80211_IFTYPE_STATION && 1646 mvmvif->ap_sta_id == sta_id) { 1647 /* if associated - we can't remove the AP STA now */ 1648 if (vif->bss_conf.assoc) 1649 return ret; 1650 1651 /* unassoc - go ahead - remove the AP STA now */ 1652 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1653 1654 /* clear d0i3_ap_sta_id if no longer relevant */ 1655 if (mvm->d0i3_ap_sta_id == sta_id) 1656 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1657 } 1658 1659 /* 1660 * This shouldn't happen - the TDLS channel switch should be canceled 1661 * before the STA is removed. 1662 */ 1663 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1664 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1665 cancel_delayed_work(&mvm->tdls_cs.dwork); 1666 } 1667 1668 /* 1669 * Make sure that the tx response code sees the station as -EBUSY and 1670 * calls the drain worker. 1671 */ 1672 spin_lock_bh(&mvm_sta->lock); 1673 spin_unlock_bh(&mvm_sta->lock); 1674 1675 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1676 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1677 1678 return ret; 1679 } 1680 1681 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1682 struct ieee80211_vif *vif, 1683 u8 sta_id) 1684 { 1685 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1686 1687 lockdep_assert_held(&mvm->mutex); 1688 1689 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1690 return ret; 1691 } 1692 1693 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1694 struct iwl_mvm_int_sta *sta, 1695 u32 qmask, enum nl80211_iftype iftype, 1696 enum iwl_sta_type type) 1697 { 1698 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 1699 sta->sta_id == IWL_MVM_INVALID_STA) { 1700 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1701 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1702 return -ENOSPC; 1703 } 1704 1705 sta->tfd_queue_msk = qmask; 1706 sta->type = type; 1707 1708 /* put a non-NULL value so iterating over the stations won't stop */ 1709 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1710 return 0; 1711 } 1712 1713 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1714 { 1715 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1716 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1717 sta->sta_id = IWL_MVM_INVALID_STA; 1718 } 1719 1720 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1721 u8 sta_id, u8 fifo) 1722 { 1723 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1724 mvm->cfg->base_params->wd_timeout : 1725 IWL_WATCHDOG_DISABLED; 1726 1727 if (iwl_mvm_has_new_tx_api(mvm)) { 1728 int tvqm_queue = 1729 iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id, 1730 IWL_MAX_TID_COUNT, 1731 wdg_timeout); 1732 *queue = tvqm_queue; 1733 } else { 1734 struct iwl_trans_txq_scd_cfg cfg = { 1735 .fifo = fifo, 1736 .sta_id = sta_id, 1737 .tid = IWL_MAX_TID_COUNT, 1738 .aggregate = false, 1739 .frame_limit = IWL_FRAME_LIMIT, 1740 }; 1741 1742 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout); 1743 } 1744 } 1745 1746 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1747 { 1748 int ret; 1749 1750 lockdep_assert_held(&mvm->mutex); 1751 1752 /* Allocate aux station and assign to it the aux queue */ 1753 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1754 NL80211_IFTYPE_UNSPECIFIED, 1755 IWL_STA_AUX_ACTIVITY); 1756 if (ret) 1757 return ret; 1758 1759 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1760 if (!iwl_mvm_has_new_tx_api(mvm)) 1761 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1762 mvm->aux_sta.sta_id, 1763 IWL_MVM_TX_FIFO_MCAST); 1764 1765 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1766 MAC_INDEX_AUX, 0); 1767 if (ret) { 1768 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1769 return ret; 1770 } 1771 1772 /* 1773 * For 22000 firmware and on we cannot add queue to a station unknown 1774 * to firmware so enable queue here - after the station was added 1775 */ 1776 if (iwl_mvm_has_new_tx_api(mvm)) 1777 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1778 mvm->aux_sta.sta_id, 1779 IWL_MVM_TX_FIFO_MCAST); 1780 1781 return 0; 1782 } 1783 1784 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1785 { 1786 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1787 int ret; 1788 1789 lockdep_assert_held(&mvm->mutex); 1790 1791 /* Map snif queue to fifo - must happen before adding snif station */ 1792 if (!iwl_mvm_has_new_tx_api(mvm)) 1793 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 1794 mvm->snif_sta.sta_id, 1795 IWL_MVM_TX_FIFO_BE); 1796 1797 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1798 mvmvif->id, 0); 1799 if (ret) 1800 return ret; 1801 1802 /* 1803 * For 22000 firmware and on we cannot add queue to a station unknown 1804 * to firmware so enable queue here - after the station was added 1805 */ 1806 if (iwl_mvm_has_new_tx_api(mvm)) 1807 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 1808 mvm->snif_sta.sta_id, 1809 IWL_MVM_TX_FIFO_BE); 1810 1811 return 0; 1812 } 1813 1814 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1815 { 1816 int ret; 1817 1818 lockdep_assert_held(&mvm->mutex); 1819 1820 iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue, 1821 IWL_MAX_TID_COUNT, 0); 1822 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1823 if (ret) 1824 IWL_WARN(mvm, "Failed sending remove station\n"); 1825 1826 return ret; 1827 } 1828 1829 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1830 { 1831 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1832 } 1833 1834 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1835 { 1836 lockdep_assert_held(&mvm->mutex); 1837 1838 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1839 } 1840 1841 /* 1842 * Send the add station command for the vif's broadcast station. 1843 * Assumes that the station was already allocated. 1844 * 1845 * @mvm: the mvm component 1846 * @vif: the interface to which the broadcast station is added 1847 * @bsta: the broadcast station to add. 1848 */ 1849 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1850 { 1851 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1852 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1853 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1854 const u8 *baddr = _baddr; 1855 int queue; 1856 int ret; 1857 unsigned int wdg_timeout = 1858 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1859 struct iwl_trans_txq_scd_cfg cfg = { 1860 .fifo = IWL_MVM_TX_FIFO_VO, 1861 .sta_id = mvmvif->bcast_sta.sta_id, 1862 .tid = IWL_MAX_TID_COUNT, 1863 .aggregate = false, 1864 .frame_limit = IWL_FRAME_LIMIT, 1865 }; 1866 1867 lockdep_assert_held(&mvm->mutex); 1868 1869 if (!iwl_mvm_has_new_tx_api(mvm)) { 1870 if (vif->type == NL80211_IFTYPE_AP || 1871 vif->type == NL80211_IFTYPE_ADHOC) 1872 queue = mvm->probe_queue; 1873 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1874 queue = mvm->p2p_dev_queue; 1875 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 1876 return -EINVAL; 1877 1878 bsta->tfd_queue_msk |= BIT(queue); 1879 1880 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, 1881 &cfg, wdg_timeout); 1882 } 1883 1884 if (vif->type == NL80211_IFTYPE_ADHOC) 1885 baddr = vif->bss_conf.bssid; 1886 1887 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 1888 return -ENOSPC; 1889 1890 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1891 mvmvif->id, mvmvif->color); 1892 if (ret) 1893 return ret; 1894 1895 /* 1896 * For 22000 firmware and on we cannot add queue to a station unknown 1897 * to firmware so enable queue here - after the station was added 1898 */ 1899 if (iwl_mvm_has_new_tx_api(mvm)) { 1900 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0], 1901 bsta->sta_id, 1902 IWL_MAX_TID_COUNT, 1903 wdg_timeout); 1904 1905 if (vif->type == NL80211_IFTYPE_AP || 1906 vif->type == NL80211_IFTYPE_ADHOC) 1907 mvm->probe_queue = queue; 1908 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1909 mvm->p2p_dev_queue = queue; 1910 } 1911 1912 return 0; 1913 } 1914 1915 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 1916 struct ieee80211_vif *vif) 1917 { 1918 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1919 int queue; 1920 1921 lockdep_assert_held(&mvm->mutex); 1922 1923 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 1924 1925 switch (vif->type) { 1926 case NL80211_IFTYPE_AP: 1927 case NL80211_IFTYPE_ADHOC: 1928 queue = mvm->probe_queue; 1929 break; 1930 case NL80211_IFTYPE_P2P_DEVICE: 1931 queue = mvm->p2p_dev_queue; 1932 break; 1933 default: 1934 WARN(1, "Can't free bcast queue on vif type %d\n", 1935 vif->type); 1936 return; 1937 } 1938 1939 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0); 1940 if (iwl_mvm_has_new_tx_api(mvm)) 1941 return; 1942 1943 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 1944 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 1945 } 1946 1947 /* Send the FW a request to remove the station from it's internal data 1948 * structures, but DO NOT remove the entry from the local data structures. */ 1949 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1950 { 1951 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1952 int ret; 1953 1954 lockdep_assert_held(&mvm->mutex); 1955 1956 iwl_mvm_free_bcast_sta_queues(mvm, vif); 1957 1958 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1959 if (ret) 1960 IWL_WARN(mvm, "Failed sending remove station\n"); 1961 return ret; 1962 } 1963 1964 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1965 { 1966 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1967 1968 lockdep_assert_held(&mvm->mutex); 1969 1970 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 1971 ieee80211_vif_type_p2p(vif), 1972 IWL_STA_GENERAL_PURPOSE); 1973 } 1974 1975 /* Allocate a new station entry for the broadcast station to the given vif, 1976 * and send it to the FW. 1977 * Note that each P2P mac should have its own broadcast station. 1978 * 1979 * @mvm: the mvm component 1980 * @vif: the interface to which the broadcast station is added 1981 * @bsta: the broadcast station to add. */ 1982 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1983 { 1984 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1985 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1986 int ret; 1987 1988 lockdep_assert_held(&mvm->mutex); 1989 1990 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1991 if (ret) 1992 return ret; 1993 1994 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 1995 1996 if (ret) 1997 iwl_mvm_dealloc_int_sta(mvm, bsta); 1998 1999 return ret; 2000 } 2001 2002 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2003 { 2004 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2005 2006 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2007 } 2008 2009 /* 2010 * Send the FW a request to remove the station from it's internal data 2011 * structures, and in addition remove it from the local data structure. 2012 */ 2013 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2014 { 2015 int ret; 2016 2017 lockdep_assert_held(&mvm->mutex); 2018 2019 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2020 2021 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2022 2023 return ret; 2024 } 2025 2026 /* 2027 * Allocate a new station entry for the multicast station to the given vif, 2028 * and send it to the FW. 2029 * Note that each AP/GO mac should have its own multicast station. 2030 * 2031 * @mvm: the mvm component 2032 * @vif: the interface to which the multicast station is added 2033 */ 2034 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2035 { 2036 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2037 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2038 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2039 const u8 *maddr = _maddr; 2040 struct iwl_trans_txq_scd_cfg cfg = { 2041 .fifo = IWL_MVM_TX_FIFO_MCAST, 2042 .sta_id = msta->sta_id, 2043 .tid = 0, 2044 .aggregate = false, 2045 .frame_limit = IWL_FRAME_LIMIT, 2046 }; 2047 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2048 int ret; 2049 2050 lockdep_assert_held(&mvm->mutex); 2051 2052 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2053 vif->type != NL80211_IFTYPE_ADHOC)) 2054 return -ENOTSUPP; 2055 2056 /* 2057 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2058 * invalid, so make sure we use the queue we want. 2059 * Note that this is done here as we want to avoid making DQA 2060 * changes in mac80211 layer. 2061 */ 2062 if (vif->type == NL80211_IFTYPE_ADHOC) { 2063 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2064 mvmvif->cab_queue = vif->cab_queue; 2065 } 2066 2067 /* 2068 * While in previous FWs we had to exclude cab queue from TFD queue 2069 * mask, now it is needed as any other queue. 2070 */ 2071 if (!iwl_mvm_has_new_tx_api(mvm) && 2072 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2073 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2074 &cfg, timeout); 2075 msta->tfd_queue_msk |= BIT(vif->cab_queue); 2076 } 2077 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2078 mvmvif->id, mvmvif->color); 2079 if (ret) { 2080 iwl_mvm_dealloc_int_sta(mvm, msta); 2081 return ret; 2082 } 2083 2084 /* 2085 * Enable cab queue after the ADD_STA command is sent. 2086 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG 2087 * command with unknown station id, and for FW that doesn't support 2088 * station API since the cab queue is not included in the 2089 * tfd_queue_mask. 2090 */ 2091 if (iwl_mvm_has_new_tx_api(mvm)) { 2092 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue, 2093 msta->sta_id, 2094 0, 2095 timeout); 2096 mvmvif->cab_queue = queue; 2097 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2098 IWL_UCODE_TLV_API_STA_TYPE)) 2099 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2100 &cfg, timeout); 2101 2102 return 0; 2103 } 2104 2105 /* 2106 * Send the FW a request to remove the station from it's internal data 2107 * structures, and in addition remove it from the local data structure. 2108 */ 2109 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2110 { 2111 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2112 int ret; 2113 2114 lockdep_assert_held(&mvm->mutex); 2115 2116 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2117 2118 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue, 2119 0, 0); 2120 2121 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2122 if (ret) 2123 IWL_WARN(mvm, "Failed sending remove station\n"); 2124 2125 return ret; 2126 } 2127 2128 #define IWL_MAX_RX_BA_SESSIONS 16 2129 2130 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2131 { 2132 struct iwl_mvm_delba_notif notif = { 2133 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2134 .metadata.sync = 1, 2135 .delba.baid = baid, 2136 }; 2137 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2138 }; 2139 2140 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2141 struct iwl_mvm_baid_data *data) 2142 { 2143 int i; 2144 2145 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2146 2147 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2148 int j; 2149 struct iwl_mvm_reorder_buffer *reorder_buf = 2150 &data->reorder_buf[i]; 2151 struct iwl_mvm_reorder_buf_entry *entries = 2152 &data->entries[i * data->entries_per_queue]; 2153 2154 spin_lock_bh(&reorder_buf->lock); 2155 if (likely(!reorder_buf->num_stored)) { 2156 spin_unlock_bh(&reorder_buf->lock); 2157 continue; 2158 } 2159 2160 /* 2161 * This shouldn't happen in regular DELBA since the internal 2162 * delBA notification should trigger a release of all frames in 2163 * the reorder buffer. 2164 */ 2165 WARN_ON(1); 2166 2167 for (j = 0; j < reorder_buf->buf_size; j++) 2168 __skb_queue_purge(&entries[j].e.frames); 2169 /* 2170 * Prevent timer re-arm. This prevents a very far fetched case 2171 * where we timed out on the notification. There may be prior 2172 * RX frames pending in the RX queue before the notification 2173 * that might get processed between now and the actual deletion 2174 * and we would re-arm the timer although we are deleting the 2175 * reorder buffer. 2176 */ 2177 reorder_buf->removed = true; 2178 spin_unlock_bh(&reorder_buf->lock); 2179 del_timer_sync(&reorder_buf->reorder_timer); 2180 } 2181 } 2182 2183 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2184 struct iwl_mvm_baid_data *data, 2185 u16 ssn, u8 buf_size) 2186 { 2187 int i; 2188 2189 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2190 struct iwl_mvm_reorder_buffer *reorder_buf = 2191 &data->reorder_buf[i]; 2192 struct iwl_mvm_reorder_buf_entry *entries = 2193 &data->entries[i * data->entries_per_queue]; 2194 int j; 2195 2196 reorder_buf->num_stored = 0; 2197 reorder_buf->head_sn = ssn; 2198 reorder_buf->buf_size = buf_size; 2199 /* rx reorder timer */ 2200 timer_setup(&reorder_buf->reorder_timer, 2201 iwl_mvm_reorder_timer_expired, 0); 2202 spin_lock_init(&reorder_buf->lock); 2203 reorder_buf->mvm = mvm; 2204 reorder_buf->queue = i; 2205 reorder_buf->valid = false; 2206 for (j = 0; j < reorder_buf->buf_size; j++) 2207 __skb_queue_head_init(&entries[j].e.frames); 2208 } 2209 } 2210 2211 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2212 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2213 { 2214 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2215 struct iwl_mvm_add_sta_cmd cmd = {}; 2216 struct iwl_mvm_baid_data *baid_data = NULL; 2217 int ret; 2218 u32 status; 2219 2220 lockdep_assert_held(&mvm->mutex); 2221 2222 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2223 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2224 return -ENOSPC; 2225 } 2226 2227 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2228 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2229 2230 /* sparse doesn't like the __align() so don't check */ 2231 #ifndef __CHECKER__ 2232 /* 2233 * The division below will be OK if either the cache line size 2234 * can be divided by the entry size (ALIGN will round up) or if 2235 * if the entry size can be divided by the cache line size, in 2236 * which case the ALIGN() will do nothing. 2237 */ 2238 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2239 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2240 #endif 2241 2242 /* 2243 * Upward align the reorder buffer size to fill an entire cache 2244 * line for each queue, to avoid sharing cache lines between 2245 * different queues. 2246 */ 2247 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2248 2249 /* 2250 * Allocate here so if allocation fails we can bail out early 2251 * before starting the BA session in the firmware 2252 */ 2253 baid_data = kzalloc(sizeof(*baid_data) + 2254 mvm->trans->num_rx_queues * 2255 reorder_buf_size, 2256 GFP_KERNEL); 2257 if (!baid_data) 2258 return -ENOMEM; 2259 2260 /* 2261 * This division is why we need the above BUILD_BUG_ON(), 2262 * if that doesn't hold then this will not be right. 2263 */ 2264 baid_data->entries_per_queue = 2265 reorder_buf_size / sizeof(baid_data->entries[0]); 2266 } 2267 2268 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2269 cmd.sta_id = mvm_sta->sta_id; 2270 cmd.add_modify = STA_MODE_MODIFY; 2271 if (start) { 2272 cmd.add_immediate_ba_tid = (u8) tid; 2273 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2274 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2275 } else { 2276 cmd.remove_immediate_ba_tid = (u8) tid; 2277 } 2278 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2279 STA_MODIFY_REMOVE_BA_TID; 2280 2281 status = ADD_STA_SUCCESS; 2282 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2283 iwl_mvm_add_sta_cmd_size(mvm), 2284 &cmd, &status); 2285 if (ret) 2286 goto out_free; 2287 2288 switch (status & IWL_ADD_STA_STATUS_MASK) { 2289 case ADD_STA_SUCCESS: 2290 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2291 start ? "start" : "stopp"); 2292 break; 2293 case ADD_STA_IMMEDIATE_BA_FAILURE: 2294 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2295 ret = -ENOSPC; 2296 break; 2297 default: 2298 ret = -EIO; 2299 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2300 start ? "start" : "stopp", status); 2301 break; 2302 } 2303 2304 if (ret) 2305 goto out_free; 2306 2307 if (start) { 2308 u8 baid; 2309 2310 mvm->rx_ba_sessions++; 2311 2312 if (!iwl_mvm_has_new_rx_api(mvm)) 2313 return 0; 2314 2315 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2316 ret = -EINVAL; 2317 goto out_free; 2318 } 2319 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2320 IWL_ADD_STA_BAID_SHIFT); 2321 baid_data->baid = baid; 2322 baid_data->timeout = timeout; 2323 baid_data->last_rx = jiffies; 2324 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2325 timer_setup(&baid_data->session_timer, 2326 iwl_mvm_rx_agg_session_expired, 0); 2327 baid_data->mvm = mvm; 2328 baid_data->tid = tid; 2329 baid_data->sta_id = mvm_sta->sta_id; 2330 2331 mvm_sta->tid_to_baid[tid] = baid; 2332 if (timeout) 2333 mod_timer(&baid_data->session_timer, 2334 TU_TO_EXP_TIME(timeout * 2)); 2335 2336 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2337 /* 2338 * protect the BA data with RCU to cover a case where our 2339 * internal RX sync mechanism will timeout (not that it's 2340 * supposed to happen) and we will free the session data while 2341 * RX is being processed in parallel 2342 */ 2343 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2344 mvm_sta->sta_id, tid, baid); 2345 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2346 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2347 } else { 2348 u8 baid = mvm_sta->tid_to_baid[tid]; 2349 2350 if (mvm->rx_ba_sessions > 0) 2351 /* check that restart flow didn't zero the counter */ 2352 mvm->rx_ba_sessions--; 2353 if (!iwl_mvm_has_new_rx_api(mvm)) 2354 return 0; 2355 2356 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2357 return -EINVAL; 2358 2359 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2360 if (WARN_ON(!baid_data)) 2361 return -EINVAL; 2362 2363 /* synchronize all rx queues so we can safely delete */ 2364 iwl_mvm_free_reorder(mvm, baid_data); 2365 del_timer_sync(&baid_data->session_timer); 2366 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2367 kfree_rcu(baid_data, rcu_head); 2368 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2369 } 2370 return 0; 2371 2372 out_free: 2373 kfree(baid_data); 2374 return ret; 2375 } 2376 2377 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2378 int tid, u8 queue, bool start) 2379 { 2380 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2381 struct iwl_mvm_add_sta_cmd cmd = {}; 2382 int ret; 2383 u32 status; 2384 2385 lockdep_assert_held(&mvm->mutex); 2386 2387 if (start) { 2388 mvm_sta->tfd_queue_msk |= BIT(queue); 2389 mvm_sta->tid_disable_agg &= ~BIT(tid); 2390 } else { 2391 /* In DQA-mode the queue isn't removed on agg termination */ 2392 mvm_sta->tid_disable_agg |= BIT(tid); 2393 } 2394 2395 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2396 cmd.sta_id = mvm_sta->sta_id; 2397 cmd.add_modify = STA_MODE_MODIFY; 2398 if (!iwl_mvm_has_new_tx_api(mvm)) 2399 cmd.modify_mask = STA_MODIFY_QUEUES; 2400 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2401 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2402 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2403 2404 status = ADD_STA_SUCCESS; 2405 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2406 iwl_mvm_add_sta_cmd_size(mvm), 2407 &cmd, &status); 2408 if (ret) 2409 return ret; 2410 2411 switch (status & IWL_ADD_STA_STATUS_MASK) { 2412 case ADD_STA_SUCCESS: 2413 break; 2414 default: 2415 ret = -EIO; 2416 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2417 start ? "start" : "stopp", status); 2418 break; 2419 } 2420 2421 return ret; 2422 } 2423 2424 const u8 tid_to_mac80211_ac[] = { 2425 IEEE80211_AC_BE, 2426 IEEE80211_AC_BK, 2427 IEEE80211_AC_BK, 2428 IEEE80211_AC_BE, 2429 IEEE80211_AC_VI, 2430 IEEE80211_AC_VI, 2431 IEEE80211_AC_VO, 2432 IEEE80211_AC_VO, 2433 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2434 }; 2435 2436 static const u8 tid_to_ucode_ac[] = { 2437 AC_BE, 2438 AC_BK, 2439 AC_BK, 2440 AC_BE, 2441 AC_VI, 2442 AC_VI, 2443 AC_VO, 2444 AC_VO, 2445 }; 2446 2447 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2448 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2449 { 2450 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2451 struct iwl_mvm_tid_data *tid_data; 2452 u16 normalized_ssn; 2453 int txq_id; 2454 int ret; 2455 2456 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2457 return -EINVAL; 2458 2459 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2460 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2461 IWL_ERR(mvm, 2462 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2463 mvmsta->tid_data[tid].state); 2464 return -ENXIO; 2465 } 2466 2467 lockdep_assert_held(&mvm->mutex); 2468 2469 spin_lock_bh(&mvmsta->lock); 2470 2471 /* possible race condition - we entered D0i3 while starting agg */ 2472 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2473 spin_unlock_bh(&mvmsta->lock); 2474 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2475 return -EIO; 2476 } 2477 2478 spin_lock(&mvm->queue_info_lock); 2479 2480 /* 2481 * Note the possible cases: 2482 * 1. An enabled TXQ - TXQ needs to become agg'ed 2483 * 2. The TXQ hasn't yet been enabled, so find a free one and mark 2484 * it as reserved 2485 */ 2486 txq_id = mvmsta->tid_data[tid].txq_id; 2487 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2488 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2489 IWL_MVM_DQA_MIN_DATA_QUEUE, 2490 IWL_MVM_DQA_MAX_DATA_QUEUE); 2491 if (txq_id < 0) { 2492 ret = txq_id; 2493 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2494 goto release_locks; 2495 } 2496 2497 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2498 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2499 } else if (unlikely(mvm->queue_info[txq_id].status == 2500 IWL_MVM_QUEUE_SHARED)) { 2501 ret = -ENXIO; 2502 IWL_DEBUG_TX_QUEUES(mvm, 2503 "Can't start tid %d agg on shared queue!\n", 2504 tid); 2505 goto release_locks; 2506 } 2507 2508 spin_unlock(&mvm->queue_info_lock); 2509 2510 IWL_DEBUG_TX_QUEUES(mvm, 2511 "AGG for tid %d will be on queue #%d\n", 2512 tid, txq_id); 2513 2514 tid_data = &mvmsta->tid_data[tid]; 2515 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2516 tid_data->txq_id = txq_id; 2517 *ssn = tid_data->ssn; 2518 2519 IWL_DEBUG_TX_QUEUES(mvm, 2520 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2521 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2522 tid_data->next_reclaimed); 2523 2524 /* 2525 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 2526 * to align the wrap around of ssn so we compare relevant values. 2527 */ 2528 normalized_ssn = tid_data->ssn; 2529 if (mvm->trans->cfg->gen2) 2530 normalized_ssn &= 0xff; 2531 2532 if (normalized_ssn == tid_data->next_reclaimed) { 2533 tid_data->state = IWL_AGG_STARTING; 2534 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2535 } else { 2536 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2537 } 2538 2539 ret = 0; 2540 goto out; 2541 2542 release_locks: 2543 spin_unlock(&mvm->queue_info_lock); 2544 out: 2545 spin_unlock_bh(&mvmsta->lock); 2546 2547 return ret; 2548 } 2549 2550 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2551 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2552 bool amsdu) 2553 { 2554 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2555 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2556 unsigned int wdg_timeout = 2557 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2558 int queue, ret; 2559 bool alloc_queue = true; 2560 enum iwl_mvm_queue_status queue_status; 2561 u16 ssn; 2562 2563 struct iwl_trans_txq_scd_cfg cfg = { 2564 .sta_id = mvmsta->sta_id, 2565 .tid = tid, 2566 .frame_limit = buf_size, 2567 .aggregate = true, 2568 }; 2569 2570 /* 2571 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation 2572 * manager, so this function should never be called in this case. 2573 */ 2574 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm))) 2575 return -EINVAL; 2576 2577 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2578 != IWL_MAX_TID_COUNT); 2579 2580 spin_lock_bh(&mvmsta->lock); 2581 ssn = tid_data->ssn; 2582 queue = tid_data->txq_id; 2583 tid_data->state = IWL_AGG_ON; 2584 mvmsta->agg_tids |= BIT(tid); 2585 tid_data->ssn = 0xffff; 2586 tid_data->amsdu_in_ampdu_allowed = amsdu; 2587 spin_unlock_bh(&mvmsta->lock); 2588 2589 if (iwl_mvm_has_new_tx_api(mvm)) { 2590 /* 2591 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2592 * would have failed, so if we are here there is no need to 2593 * allocate a queue. 2594 * However, if aggregation size is different than the default 2595 * size, the scheduler should be reconfigured. 2596 * We cannot do this with the new TX API, so return unsupported 2597 * for now, until it will be offloaded to firmware.. 2598 * Note that if SCD default value changes - this condition 2599 * should be updated as well. 2600 */ 2601 if (buf_size < IWL_FRAME_LIMIT) 2602 return -ENOTSUPP; 2603 2604 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2605 if (ret) 2606 return -EIO; 2607 goto out; 2608 } 2609 2610 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2611 2612 spin_lock_bh(&mvm->queue_info_lock); 2613 queue_status = mvm->queue_info[queue].status; 2614 spin_unlock_bh(&mvm->queue_info_lock); 2615 2616 /* Maybe there is no need to even alloc a queue... */ 2617 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2618 alloc_queue = false; 2619 2620 /* 2621 * Only reconfig the SCD for the queue if the window size has 2622 * changed from current (become smaller) 2623 */ 2624 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2625 /* 2626 * If reconfiguring an existing queue, it first must be 2627 * drained 2628 */ 2629 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2630 BIT(queue)); 2631 if (ret) { 2632 IWL_ERR(mvm, 2633 "Error draining queue before reconfig\n"); 2634 return ret; 2635 } 2636 2637 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2638 mvmsta->sta_id, tid, 2639 buf_size, ssn); 2640 if (ret) { 2641 IWL_ERR(mvm, 2642 "Error reconfiguring TXQ #%d\n", queue); 2643 return ret; 2644 } 2645 } 2646 2647 if (alloc_queue) 2648 iwl_mvm_enable_txq(mvm, queue, 2649 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2650 &cfg, wdg_timeout); 2651 2652 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2653 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2654 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2655 if (ret) 2656 return -EIO; 2657 } 2658 2659 /* No need to mark as reserved */ 2660 spin_lock_bh(&mvm->queue_info_lock); 2661 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2662 spin_unlock_bh(&mvm->queue_info_lock); 2663 2664 out: 2665 /* 2666 * Even though in theory the peer could have different 2667 * aggregation reorder buffer sizes for different sessions, 2668 * our ucode doesn't allow for that and has a global limit 2669 * for each station. Therefore, use the minimum of all the 2670 * aggregation sessions and our default value. 2671 */ 2672 mvmsta->max_agg_bufsize = 2673 min(mvmsta->max_agg_bufsize, buf_size); 2674 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2675 2676 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2677 sta->addr, tid); 2678 2679 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false); 2680 } 2681 2682 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2683 struct iwl_mvm_sta *mvmsta, 2684 struct iwl_mvm_tid_data *tid_data) 2685 { 2686 u16 txq_id = tid_data->txq_id; 2687 2688 if (iwl_mvm_has_new_tx_api(mvm)) 2689 return; 2690 2691 spin_lock_bh(&mvm->queue_info_lock); 2692 /* 2693 * The TXQ is marked as reserved only if no traffic came through yet 2694 * This means no traffic has been sent on this TID (agg'd or not), so 2695 * we no longer have use for the queue. Since it hasn't even been 2696 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2697 * free. 2698 */ 2699 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) { 2700 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2701 tid_data->txq_id = IWL_MVM_INVALID_QUEUE; 2702 } 2703 2704 spin_unlock_bh(&mvm->queue_info_lock); 2705 } 2706 2707 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2708 struct ieee80211_sta *sta, u16 tid) 2709 { 2710 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2711 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2712 u16 txq_id; 2713 int err; 2714 2715 /* 2716 * If mac80211 is cleaning its state, then say that we finished since 2717 * our state has been cleared anyway. 2718 */ 2719 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2720 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2721 return 0; 2722 } 2723 2724 spin_lock_bh(&mvmsta->lock); 2725 2726 txq_id = tid_data->txq_id; 2727 2728 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2729 mvmsta->sta_id, tid, txq_id, tid_data->state); 2730 2731 mvmsta->agg_tids &= ~BIT(tid); 2732 2733 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 2734 2735 switch (tid_data->state) { 2736 case IWL_AGG_ON: 2737 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2738 2739 IWL_DEBUG_TX_QUEUES(mvm, 2740 "ssn = %d, next_recl = %d\n", 2741 tid_data->ssn, tid_data->next_reclaimed); 2742 2743 tid_data->ssn = 0xffff; 2744 tid_data->state = IWL_AGG_OFF; 2745 spin_unlock_bh(&mvmsta->lock); 2746 2747 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2748 2749 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2750 return 0; 2751 case IWL_AGG_STARTING: 2752 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2753 /* 2754 * The agg session has been stopped before it was set up. This 2755 * can happen when the AddBA timer times out for example. 2756 */ 2757 2758 /* No barriers since we are under mutex */ 2759 lockdep_assert_held(&mvm->mutex); 2760 2761 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2762 tid_data->state = IWL_AGG_OFF; 2763 err = 0; 2764 break; 2765 default: 2766 IWL_ERR(mvm, 2767 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2768 mvmsta->sta_id, tid, tid_data->state); 2769 IWL_ERR(mvm, 2770 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2771 err = -EINVAL; 2772 } 2773 2774 spin_unlock_bh(&mvmsta->lock); 2775 2776 return err; 2777 } 2778 2779 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2780 struct ieee80211_sta *sta, u16 tid) 2781 { 2782 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2783 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2784 u16 txq_id; 2785 enum iwl_mvm_agg_state old_state; 2786 2787 /* 2788 * First set the agg state to OFF to avoid calling 2789 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2790 */ 2791 spin_lock_bh(&mvmsta->lock); 2792 txq_id = tid_data->txq_id; 2793 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2794 mvmsta->sta_id, tid, txq_id, tid_data->state); 2795 old_state = tid_data->state; 2796 tid_data->state = IWL_AGG_OFF; 2797 mvmsta->agg_tids &= ~BIT(tid); 2798 spin_unlock_bh(&mvmsta->lock); 2799 2800 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data); 2801 2802 if (old_state >= IWL_AGG_ON) { 2803 iwl_mvm_drain_sta(mvm, mvmsta, true); 2804 2805 if (iwl_mvm_has_new_tx_api(mvm)) { 2806 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2807 BIT(tid), 0)) 2808 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2809 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2810 } else { 2811 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2812 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2813 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2814 } 2815 2816 iwl_mvm_drain_sta(mvm, mvmsta, false); 2817 2818 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2819 } 2820 2821 return 0; 2822 } 2823 2824 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2825 { 2826 int i, max = -1, max_offs = -1; 2827 2828 lockdep_assert_held(&mvm->mutex); 2829 2830 /* Pick the unused key offset with the highest 'deleted' 2831 * counter. Every time a key is deleted, all the counters 2832 * are incremented and the one that was just deleted is 2833 * reset to zero. Thus, the highest counter is the one 2834 * that was deleted longest ago. Pick that one. 2835 */ 2836 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2837 if (test_bit(i, mvm->fw_key_table)) 2838 continue; 2839 if (mvm->fw_key_deleted[i] > max) { 2840 max = mvm->fw_key_deleted[i]; 2841 max_offs = i; 2842 } 2843 } 2844 2845 if (max_offs < 0) 2846 return STA_KEY_IDX_INVALID; 2847 2848 return max_offs; 2849 } 2850 2851 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2852 struct ieee80211_vif *vif, 2853 struct ieee80211_sta *sta) 2854 { 2855 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2856 2857 if (sta) 2858 return iwl_mvm_sta_from_mac80211(sta); 2859 2860 /* 2861 * The device expects GTKs for station interfaces to be 2862 * installed as GTKs for the AP station. If we have no 2863 * station ID, then use AP's station ID. 2864 */ 2865 if (vif->type == NL80211_IFTYPE_STATION && 2866 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 2867 u8 sta_id = mvmvif->ap_sta_id; 2868 2869 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2870 lockdep_is_held(&mvm->mutex)); 2871 2872 /* 2873 * It is possible that the 'sta' parameter is NULL, 2874 * for example when a GTK is removed - the sta_id will then 2875 * be the AP ID, and no station was passed by mac80211. 2876 */ 2877 if (IS_ERR_OR_NULL(sta)) 2878 return NULL; 2879 2880 return iwl_mvm_sta_from_mac80211(sta); 2881 } 2882 2883 return NULL; 2884 } 2885 2886 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2887 u32 sta_id, 2888 struct ieee80211_key_conf *key, bool mcast, 2889 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2890 u8 key_offset) 2891 { 2892 union { 2893 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2894 struct iwl_mvm_add_sta_key_cmd cmd; 2895 } u = {}; 2896 __le16 key_flags; 2897 int ret; 2898 u32 status; 2899 u16 keyidx; 2900 u64 pn = 0; 2901 int i, size; 2902 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2903 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2904 2905 if (sta_id == IWL_MVM_INVALID_STA) 2906 return -EINVAL; 2907 2908 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 2909 STA_KEY_FLG_KEYID_MSK; 2910 key_flags = cpu_to_le16(keyidx); 2911 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2912 2913 switch (key->cipher) { 2914 case WLAN_CIPHER_SUITE_TKIP: 2915 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2916 if (new_api) { 2917 memcpy((void *)&u.cmd.tx_mic_key, 2918 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 2919 IWL_MIC_KEY_SIZE); 2920 2921 memcpy((void *)&u.cmd.rx_mic_key, 2922 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 2923 IWL_MIC_KEY_SIZE); 2924 pn = atomic64_read(&key->tx_pn); 2925 2926 } else { 2927 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 2928 for (i = 0; i < 5; i++) 2929 u.cmd_v1.tkip_rx_ttak[i] = 2930 cpu_to_le16(tkip_p1k[i]); 2931 } 2932 memcpy(u.cmd.common.key, key->key, key->keylen); 2933 break; 2934 case WLAN_CIPHER_SUITE_CCMP: 2935 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2936 memcpy(u.cmd.common.key, key->key, key->keylen); 2937 if (new_api) 2938 pn = atomic64_read(&key->tx_pn); 2939 break; 2940 case WLAN_CIPHER_SUITE_WEP104: 2941 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2942 /* fall through */ 2943 case WLAN_CIPHER_SUITE_WEP40: 2944 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2945 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 2946 break; 2947 case WLAN_CIPHER_SUITE_GCMP_256: 2948 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2949 /* fall through */ 2950 case WLAN_CIPHER_SUITE_GCMP: 2951 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2952 memcpy(u.cmd.common.key, key->key, key->keylen); 2953 if (new_api) 2954 pn = atomic64_read(&key->tx_pn); 2955 break; 2956 default: 2957 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2958 memcpy(u.cmd.common.key, key->key, key->keylen); 2959 } 2960 2961 if (mcast) 2962 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2963 2964 u.cmd.common.key_offset = key_offset; 2965 u.cmd.common.key_flags = key_flags; 2966 u.cmd.common.sta_id = sta_id; 2967 2968 if (new_api) { 2969 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 2970 size = sizeof(u.cmd); 2971 } else { 2972 size = sizeof(u.cmd_v1); 2973 } 2974 2975 status = ADD_STA_SUCCESS; 2976 if (cmd_flags & CMD_ASYNC) 2977 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 2978 &u.cmd); 2979 else 2980 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 2981 &u.cmd, &status); 2982 2983 switch (status) { 2984 case ADD_STA_SUCCESS: 2985 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2986 break; 2987 default: 2988 ret = -EIO; 2989 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2990 break; 2991 } 2992 2993 return ret; 2994 } 2995 2996 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2997 struct ieee80211_key_conf *keyconf, 2998 u8 sta_id, bool remove_key) 2999 { 3000 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3001 3002 /* verify the key details match the required command's expectations */ 3003 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3004 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3005 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3006 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3007 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3008 return -EINVAL; 3009 3010 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3011 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3012 return -EINVAL; 3013 3014 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3015 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3016 3017 if (remove_key) { 3018 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3019 } else { 3020 struct ieee80211_key_seq seq; 3021 const u8 *pn; 3022 3023 switch (keyconf->cipher) { 3024 case WLAN_CIPHER_SUITE_AES_CMAC: 3025 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3026 break; 3027 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3028 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3029 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3030 break; 3031 default: 3032 return -EINVAL; 3033 } 3034 3035 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3036 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3037 igtk_cmd.ctrl_flags |= 3038 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3039 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3040 pn = seq.aes_cmac.pn; 3041 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3042 ((u64) pn[4] << 8) | 3043 ((u64) pn[3] << 16) | 3044 ((u64) pn[2] << 24) | 3045 ((u64) pn[1] << 32) | 3046 ((u64) pn[0] << 40)); 3047 } 3048 3049 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3050 remove_key ? "removing" : "installing", 3051 igtk_cmd.sta_id); 3052 3053 if (!iwl_mvm_has_new_rx_api(mvm)) { 3054 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3055 .ctrl_flags = igtk_cmd.ctrl_flags, 3056 .key_id = igtk_cmd.key_id, 3057 .sta_id = igtk_cmd.sta_id, 3058 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3059 }; 3060 3061 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3062 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3063 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3064 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3065 } 3066 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3067 sizeof(igtk_cmd), &igtk_cmd); 3068 } 3069 3070 3071 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3072 struct ieee80211_vif *vif, 3073 struct ieee80211_sta *sta) 3074 { 3075 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3076 3077 if (sta) 3078 return sta->addr; 3079 3080 if (vif->type == NL80211_IFTYPE_STATION && 3081 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3082 u8 sta_id = mvmvif->ap_sta_id; 3083 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3084 lockdep_is_held(&mvm->mutex)); 3085 return sta->addr; 3086 } 3087 3088 3089 return NULL; 3090 } 3091 3092 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3093 struct ieee80211_vif *vif, 3094 struct ieee80211_sta *sta, 3095 struct ieee80211_key_conf *keyconf, 3096 u8 key_offset, 3097 bool mcast) 3098 { 3099 int ret; 3100 const u8 *addr; 3101 struct ieee80211_key_seq seq; 3102 u16 p1k[5]; 3103 u32 sta_id; 3104 3105 if (sta) { 3106 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3107 3108 sta_id = mvm_sta->sta_id; 3109 } else if (vif->type == NL80211_IFTYPE_AP && 3110 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3111 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3112 3113 sta_id = mvmvif->mcast_sta.sta_id; 3114 } else { 3115 IWL_ERR(mvm, "Failed to find station id\n"); 3116 return -EINVAL; 3117 } 3118 3119 switch (keyconf->cipher) { 3120 case WLAN_CIPHER_SUITE_TKIP: 3121 if (vif->type == NL80211_IFTYPE_AP) { 3122 ret = -EINVAL; 3123 break; 3124 } 3125 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3126 /* get phase 1 key from mac80211 */ 3127 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3128 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3129 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3130 seq.tkip.iv32, p1k, 0, key_offset); 3131 break; 3132 case WLAN_CIPHER_SUITE_CCMP: 3133 case WLAN_CIPHER_SUITE_WEP40: 3134 case WLAN_CIPHER_SUITE_WEP104: 3135 case WLAN_CIPHER_SUITE_GCMP: 3136 case WLAN_CIPHER_SUITE_GCMP_256: 3137 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3138 0, NULL, 0, key_offset); 3139 break; 3140 default: 3141 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3142 0, NULL, 0, key_offset); 3143 } 3144 3145 return ret; 3146 } 3147 3148 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3149 struct ieee80211_key_conf *keyconf, 3150 bool mcast) 3151 { 3152 union { 3153 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3154 struct iwl_mvm_add_sta_key_cmd cmd; 3155 } u = {}; 3156 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3157 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3158 __le16 key_flags; 3159 int ret, size; 3160 u32 status; 3161 3162 /* This is a valid situation for GTK removal */ 3163 if (sta_id == IWL_MVM_INVALID_STA) 3164 return 0; 3165 3166 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3167 STA_KEY_FLG_KEYID_MSK); 3168 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3169 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3170 3171 if (mcast) 3172 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3173 3174 /* 3175 * The fields assigned here are in the same location at the start 3176 * of the command, so we can do this union trick. 3177 */ 3178 u.cmd.common.key_flags = key_flags; 3179 u.cmd.common.key_offset = keyconf->hw_key_idx; 3180 u.cmd.common.sta_id = sta_id; 3181 3182 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3183 3184 status = ADD_STA_SUCCESS; 3185 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3186 &status); 3187 3188 switch (status) { 3189 case ADD_STA_SUCCESS: 3190 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3191 break; 3192 default: 3193 ret = -EIO; 3194 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3195 break; 3196 } 3197 3198 return ret; 3199 } 3200 3201 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3202 struct ieee80211_vif *vif, 3203 struct ieee80211_sta *sta, 3204 struct ieee80211_key_conf *keyconf, 3205 u8 key_offset) 3206 { 3207 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3208 struct iwl_mvm_sta *mvm_sta; 3209 u8 sta_id = IWL_MVM_INVALID_STA; 3210 int ret; 3211 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3212 3213 lockdep_assert_held(&mvm->mutex); 3214 3215 if (vif->type != NL80211_IFTYPE_AP || 3216 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3217 /* Get the station id from the mvm local station table */ 3218 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3219 if (!mvm_sta) { 3220 IWL_ERR(mvm, "Failed to find station\n"); 3221 return -EINVAL; 3222 } 3223 sta_id = mvm_sta->sta_id; 3224 3225 /* 3226 * It is possible that the 'sta' parameter is NULL, and thus 3227 * there is a need to retrieve the sta from the local station 3228 * table. 3229 */ 3230 if (!sta) { 3231 sta = rcu_dereference_protected( 3232 mvm->fw_id_to_mac_id[sta_id], 3233 lockdep_is_held(&mvm->mutex)); 3234 if (IS_ERR_OR_NULL(sta)) { 3235 IWL_ERR(mvm, "Invalid station id\n"); 3236 return -EINVAL; 3237 } 3238 } 3239 3240 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3241 return -EINVAL; 3242 } else { 3243 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3244 3245 sta_id = mvmvif->mcast_sta.sta_id; 3246 } 3247 3248 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3249 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3250 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3251 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 3252 goto end; 3253 } 3254 3255 /* If the key_offset is not pre-assigned, we need to find a 3256 * new offset to use. In normal cases, the offset is not 3257 * pre-assigned, but during HW_RESTART we want to reuse the 3258 * same indices, so we pass them when this function is called. 3259 * 3260 * In D3 entry, we need to hardcoded the indices (because the 3261 * firmware hardcodes the PTK offset to 0). In this case, we 3262 * need to make sure we don't overwrite the hw_key_idx in the 3263 * keyconf structure, because otherwise we cannot configure 3264 * the original ones back when resuming. 3265 */ 3266 if (key_offset == STA_KEY_IDX_INVALID) { 3267 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3268 if (key_offset == STA_KEY_IDX_INVALID) 3269 return -ENOSPC; 3270 keyconf->hw_key_idx = key_offset; 3271 } 3272 3273 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3274 if (ret) 3275 goto end; 3276 3277 /* 3278 * For WEP, the same key is used for multicast and unicast. Upload it 3279 * again, using the same key offset, and now pointing the other one 3280 * to the same key slot (offset). 3281 * If this fails, remove the original as well. 3282 */ 3283 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3284 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3285 sta) { 3286 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3287 key_offset, !mcast); 3288 if (ret) { 3289 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3290 goto end; 3291 } 3292 } 3293 3294 __set_bit(key_offset, mvm->fw_key_table); 3295 3296 end: 3297 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3298 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3299 sta ? sta->addr : zero_addr, ret); 3300 return ret; 3301 } 3302 3303 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3304 struct ieee80211_vif *vif, 3305 struct ieee80211_sta *sta, 3306 struct ieee80211_key_conf *keyconf) 3307 { 3308 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3309 struct iwl_mvm_sta *mvm_sta; 3310 u8 sta_id = IWL_MVM_INVALID_STA; 3311 int ret, i; 3312 3313 lockdep_assert_held(&mvm->mutex); 3314 3315 /* Get the station from the mvm local station table */ 3316 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3317 if (mvm_sta) 3318 sta_id = mvm_sta->sta_id; 3319 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3320 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3321 3322 3323 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3324 keyconf->keyidx, sta_id); 3325 3326 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3327 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3328 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3329 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3330 3331 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3332 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3333 keyconf->hw_key_idx); 3334 return -ENOENT; 3335 } 3336 3337 /* track which key was deleted last */ 3338 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3339 if (mvm->fw_key_deleted[i] < U8_MAX) 3340 mvm->fw_key_deleted[i]++; 3341 } 3342 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3343 3344 if (sta && !mvm_sta) { 3345 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3346 return 0; 3347 } 3348 3349 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3350 if (ret) 3351 return ret; 3352 3353 /* delete WEP key twice to get rid of (now useless) offset */ 3354 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3355 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3356 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3357 3358 return ret; 3359 } 3360 3361 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3362 struct ieee80211_vif *vif, 3363 struct ieee80211_key_conf *keyconf, 3364 struct ieee80211_sta *sta, u32 iv32, 3365 u16 *phase1key) 3366 { 3367 struct iwl_mvm_sta *mvm_sta; 3368 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3369 3370 rcu_read_lock(); 3371 3372 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3373 if (WARN_ON_ONCE(!mvm_sta)) 3374 goto unlock; 3375 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3376 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3377 3378 unlock: 3379 rcu_read_unlock(); 3380 } 3381 3382 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3383 struct ieee80211_sta *sta) 3384 { 3385 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3386 struct iwl_mvm_add_sta_cmd cmd = { 3387 .add_modify = STA_MODE_MODIFY, 3388 .sta_id = mvmsta->sta_id, 3389 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3390 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3391 }; 3392 int ret; 3393 3394 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3395 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3396 if (ret) 3397 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3398 } 3399 3400 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3401 struct ieee80211_sta *sta, 3402 enum ieee80211_frame_release_type reason, 3403 u16 cnt, u16 tids, bool more_data, 3404 bool single_sta_queue) 3405 { 3406 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3407 struct iwl_mvm_add_sta_cmd cmd = { 3408 .add_modify = STA_MODE_MODIFY, 3409 .sta_id = mvmsta->sta_id, 3410 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3411 .sleep_tx_count = cpu_to_le16(cnt), 3412 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3413 }; 3414 int tid, ret; 3415 unsigned long _tids = tids; 3416 3417 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3418 * Note that this field is reserved and unused by firmware not 3419 * supporting GO uAPSD, so it's safe to always do this. 3420 */ 3421 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3422 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3423 3424 /* If we're releasing frames from aggregation or dqa queues then check 3425 * if all the queues that we're releasing frames from, combined, have: 3426 * - more frames than the service period, in which case more_data 3427 * needs to be set 3428 * - fewer than 'cnt' frames, in which case we need to adjust the 3429 * firmware command (but do that unconditionally) 3430 */ 3431 if (single_sta_queue) { 3432 int remaining = cnt; 3433 int sleep_tx_count; 3434 3435 spin_lock_bh(&mvmsta->lock); 3436 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3437 struct iwl_mvm_tid_data *tid_data; 3438 u16 n_queued; 3439 3440 tid_data = &mvmsta->tid_data[tid]; 3441 3442 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3443 if (n_queued > remaining) { 3444 more_data = true; 3445 remaining = 0; 3446 break; 3447 } 3448 remaining -= n_queued; 3449 } 3450 sleep_tx_count = cnt - remaining; 3451 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3452 mvmsta->sleep_tx_count = sleep_tx_count; 3453 spin_unlock_bh(&mvmsta->lock); 3454 3455 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3456 if (WARN_ON(cnt - remaining == 0)) { 3457 ieee80211_sta_eosp(sta); 3458 return; 3459 } 3460 } 3461 3462 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3463 if (more_data) 3464 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3465 3466 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3467 mvmsta->next_status_eosp = true; 3468 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3469 } else { 3470 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3471 } 3472 3473 /* block the Tx queues until the FW updated the sleep Tx count */ 3474 iwl_trans_block_txq_ptrs(mvm->trans, true); 3475 3476 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3477 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3478 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3479 if (ret) 3480 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3481 } 3482 3483 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3484 struct iwl_rx_cmd_buffer *rxb) 3485 { 3486 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3487 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3488 struct ieee80211_sta *sta; 3489 u32 sta_id = le32_to_cpu(notif->sta_id); 3490 3491 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3492 return; 3493 3494 rcu_read_lock(); 3495 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3496 if (!IS_ERR_OR_NULL(sta)) 3497 ieee80211_sta_eosp(sta); 3498 rcu_read_unlock(); 3499 } 3500 3501 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3502 struct iwl_mvm_sta *mvmsta, bool disable) 3503 { 3504 struct iwl_mvm_add_sta_cmd cmd = { 3505 .add_modify = STA_MODE_MODIFY, 3506 .sta_id = mvmsta->sta_id, 3507 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3508 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3509 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3510 }; 3511 int ret; 3512 3513 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3514 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3515 if (ret) 3516 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3517 } 3518 3519 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3520 struct ieee80211_sta *sta, 3521 bool disable) 3522 { 3523 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3524 3525 spin_lock_bh(&mvm_sta->lock); 3526 3527 if (mvm_sta->disable_tx == disable) { 3528 spin_unlock_bh(&mvm_sta->lock); 3529 return; 3530 } 3531 3532 mvm_sta->disable_tx = disable; 3533 3534 /* Tell mac80211 to start/stop queuing tx for this station */ 3535 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3536 3537 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3538 3539 spin_unlock_bh(&mvm_sta->lock); 3540 } 3541 3542 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3543 struct iwl_mvm_vif *mvmvif, 3544 struct iwl_mvm_int_sta *sta, 3545 bool disable) 3546 { 3547 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3548 struct iwl_mvm_add_sta_cmd cmd = { 3549 .add_modify = STA_MODE_MODIFY, 3550 .sta_id = sta->sta_id, 3551 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3552 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3553 .mac_id_n_color = cpu_to_le32(id), 3554 }; 3555 int ret; 3556 3557 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3558 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3559 if (ret) 3560 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3561 } 3562 3563 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3564 struct iwl_mvm_vif *mvmvif, 3565 bool disable) 3566 { 3567 struct ieee80211_sta *sta; 3568 struct iwl_mvm_sta *mvm_sta; 3569 int i; 3570 3571 lockdep_assert_held(&mvm->mutex); 3572 3573 /* Block/unblock all the stations of the given mvmvif */ 3574 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3575 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3576 lockdep_is_held(&mvm->mutex)); 3577 if (IS_ERR_OR_NULL(sta)) 3578 continue; 3579 3580 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3581 if (mvm_sta->mac_id_n_color != 3582 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3583 continue; 3584 3585 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3586 } 3587 3588 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3589 return; 3590 3591 /* Need to block/unblock also multicast station */ 3592 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3593 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3594 &mvmvif->mcast_sta, disable); 3595 3596 /* 3597 * Only unblock the broadcast station (FW blocks it for immediate 3598 * quiet, not the driver) 3599 */ 3600 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3601 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3602 &mvmvif->bcast_sta, disable); 3603 } 3604 3605 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3606 { 3607 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3608 struct iwl_mvm_sta *mvmsta; 3609 3610 rcu_read_lock(); 3611 3612 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3613 3614 if (!WARN_ON(!mvmsta)) 3615 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3616 3617 rcu_read_unlock(); 3618 } 3619 3620 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3621 { 3622 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3623 3624 /* 3625 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 3626 * to align the wrap around of ssn so we compare relevant values. 3627 */ 3628 if (mvm->trans->cfg->gen2) 3629 sn &= 0xff; 3630 3631 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3632 } 3633