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 update_fw: 1443 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1444 if (ret) 1445 goto err; 1446 1447 if (vif->type == NL80211_IFTYPE_STATION) { 1448 if (!sta->tdls) { 1449 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1450 mvmvif->ap_sta_id = sta_id; 1451 } else { 1452 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1453 } 1454 } 1455 1456 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1457 1458 return 0; 1459 1460 err: 1461 return ret; 1462 } 1463 1464 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1465 bool drain) 1466 { 1467 struct iwl_mvm_add_sta_cmd cmd = {}; 1468 int ret; 1469 u32 status; 1470 1471 lockdep_assert_held(&mvm->mutex); 1472 1473 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1474 cmd.sta_id = mvmsta->sta_id; 1475 cmd.add_modify = STA_MODE_MODIFY; 1476 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1477 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1478 1479 status = ADD_STA_SUCCESS; 1480 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1481 iwl_mvm_add_sta_cmd_size(mvm), 1482 &cmd, &status); 1483 if (ret) 1484 return ret; 1485 1486 switch (status & IWL_ADD_STA_STATUS_MASK) { 1487 case ADD_STA_SUCCESS: 1488 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1489 mvmsta->sta_id); 1490 break; 1491 default: 1492 ret = -EIO; 1493 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1494 mvmsta->sta_id); 1495 break; 1496 } 1497 1498 return ret; 1499 } 1500 1501 /* 1502 * Remove a station from the FW table. Before sending the command to remove 1503 * the station validate that the station is indeed known to the driver (sanity 1504 * only). 1505 */ 1506 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1507 { 1508 struct ieee80211_sta *sta; 1509 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1510 .sta_id = sta_id, 1511 }; 1512 int ret; 1513 1514 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1515 lockdep_is_held(&mvm->mutex)); 1516 1517 /* Note: internal stations are marked as error values */ 1518 if (!sta) { 1519 IWL_ERR(mvm, "Invalid station id\n"); 1520 return -EINVAL; 1521 } 1522 1523 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1524 sizeof(rm_sta_cmd), &rm_sta_cmd); 1525 if (ret) { 1526 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1527 return ret; 1528 } 1529 1530 return 0; 1531 } 1532 1533 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1534 struct ieee80211_vif *vif, 1535 struct iwl_mvm_sta *mvm_sta) 1536 { 1537 int ac; 1538 int i; 1539 1540 lockdep_assert_held(&mvm->mutex); 1541 1542 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1543 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1544 continue; 1545 1546 ac = iwl_mvm_tid_to_ac_queue(i); 1547 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1548 vif->hw_queue[ac], i, 0); 1549 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1550 } 1551 } 1552 1553 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1554 struct iwl_mvm_sta *mvm_sta) 1555 { 1556 int i; 1557 1558 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1559 u16 txq_id; 1560 int ret; 1561 1562 spin_lock_bh(&mvm_sta->lock); 1563 txq_id = mvm_sta->tid_data[i].txq_id; 1564 spin_unlock_bh(&mvm_sta->lock); 1565 1566 if (txq_id == IWL_MVM_INVALID_QUEUE) 1567 continue; 1568 1569 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1570 if (ret) 1571 return ret; 1572 } 1573 1574 return 0; 1575 } 1576 1577 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1578 struct ieee80211_vif *vif, 1579 struct ieee80211_sta *sta) 1580 { 1581 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1582 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1583 u8 sta_id = mvm_sta->sta_id; 1584 int ret; 1585 1586 lockdep_assert_held(&mvm->mutex); 1587 1588 if (iwl_mvm_has_new_rx_api(mvm)) 1589 kfree(mvm_sta->dup_data); 1590 1591 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1592 if (ret) 1593 return ret; 1594 1595 /* flush its queues here since we are freeing mvm_sta */ 1596 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1597 if (ret) 1598 return ret; 1599 if (iwl_mvm_has_new_tx_api(mvm)) { 1600 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1601 } else { 1602 u32 q_mask = mvm_sta->tfd_queue_msk; 1603 1604 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1605 q_mask); 1606 } 1607 if (ret) 1608 return ret; 1609 1610 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1611 1612 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1613 1614 /* If there is a TXQ still marked as reserved - free it */ 1615 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1616 u8 reserved_txq = mvm_sta->reserved_queue; 1617 enum iwl_mvm_queue_status *status; 1618 1619 /* 1620 * If no traffic has gone through the reserved TXQ - it 1621 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1622 * should be manually marked as free again 1623 */ 1624 spin_lock_bh(&mvm->queue_info_lock); 1625 status = &mvm->queue_info[reserved_txq].status; 1626 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1627 (*status != IWL_MVM_QUEUE_FREE), 1628 "sta_id %d reserved txq %d status %d", 1629 sta_id, reserved_txq, *status)) { 1630 spin_unlock_bh(&mvm->queue_info_lock); 1631 return -EINVAL; 1632 } 1633 1634 *status = IWL_MVM_QUEUE_FREE; 1635 spin_unlock_bh(&mvm->queue_info_lock); 1636 } 1637 1638 if (vif->type == NL80211_IFTYPE_STATION && 1639 mvmvif->ap_sta_id == sta_id) { 1640 /* if associated - we can't remove the AP STA now */ 1641 if (vif->bss_conf.assoc) 1642 return ret; 1643 1644 /* unassoc - go ahead - remove the AP STA now */ 1645 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1646 1647 /* clear d0i3_ap_sta_id if no longer relevant */ 1648 if (mvm->d0i3_ap_sta_id == sta_id) 1649 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1650 } 1651 1652 /* 1653 * This shouldn't happen - the TDLS channel switch should be canceled 1654 * before the STA is removed. 1655 */ 1656 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1657 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1658 cancel_delayed_work(&mvm->tdls_cs.dwork); 1659 } 1660 1661 /* 1662 * Make sure that the tx response code sees the station as -EBUSY and 1663 * calls the drain worker. 1664 */ 1665 spin_lock_bh(&mvm_sta->lock); 1666 spin_unlock_bh(&mvm_sta->lock); 1667 1668 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1669 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1670 1671 return ret; 1672 } 1673 1674 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1675 struct ieee80211_vif *vif, 1676 u8 sta_id) 1677 { 1678 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1679 1680 lockdep_assert_held(&mvm->mutex); 1681 1682 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1683 return ret; 1684 } 1685 1686 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1687 struct iwl_mvm_int_sta *sta, 1688 u32 qmask, enum nl80211_iftype iftype, 1689 enum iwl_sta_type type) 1690 { 1691 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1692 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1693 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1694 return -ENOSPC; 1695 } 1696 1697 sta->tfd_queue_msk = qmask; 1698 sta->type = type; 1699 1700 /* put a non-NULL value so iterating over the stations won't stop */ 1701 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1702 return 0; 1703 } 1704 1705 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1706 { 1707 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1708 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1709 sta->sta_id = IWL_MVM_INVALID_STA; 1710 } 1711 1712 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue, 1713 u8 sta_id, u8 fifo) 1714 { 1715 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1716 mvm->cfg->base_params->wd_timeout : 1717 IWL_WATCHDOG_DISABLED; 1718 1719 if (iwl_mvm_has_new_tx_api(mvm)) { 1720 int tvqm_queue = 1721 iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id, 1722 IWL_MAX_TID_COUNT, 1723 wdg_timeout); 1724 *queue = tvqm_queue; 1725 } else { 1726 struct iwl_trans_txq_scd_cfg cfg = { 1727 .fifo = fifo, 1728 .sta_id = sta_id, 1729 .tid = IWL_MAX_TID_COUNT, 1730 .aggregate = false, 1731 .frame_limit = IWL_FRAME_LIMIT, 1732 }; 1733 1734 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout); 1735 } 1736 } 1737 1738 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1739 { 1740 int ret; 1741 1742 lockdep_assert_held(&mvm->mutex); 1743 1744 /* Allocate aux station and assign to it the aux queue */ 1745 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1746 NL80211_IFTYPE_UNSPECIFIED, 1747 IWL_STA_AUX_ACTIVITY); 1748 if (ret) 1749 return ret; 1750 1751 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1752 if (!iwl_mvm_has_new_tx_api(mvm)) 1753 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1754 mvm->aux_sta.sta_id, 1755 IWL_MVM_TX_FIFO_MCAST); 1756 1757 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1758 MAC_INDEX_AUX, 0); 1759 if (ret) { 1760 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1761 return ret; 1762 } 1763 1764 /* 1765 * For a000 firmware and on we cannot add queue to a station unknown 1766 * to firmware so enable queue here - after the station was added 1767 */ 1768 if (iwl_mvm_has_new_tx_api(mvm)) 1769 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue, 1770 mvm->aux_sta.sta_id, 1771 IWL_MVM_TX_FIFO_MCAST); 1772 1773 return 0; 1774 } 1775 1776 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1777 { 1778 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1779 int ret; 1780 1781 lockdep_assert_held(&mvm->mutex); 1782 1783 /* Map snif queue to fifo - must happen before adding snif station */ 1784 if (!iwl_mvm_has_new_tx_api(mvm)) 1785 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 1786 mvm->snif_sta.sta_id, 1787 IWL_MVM_TX_FIFO_BE); 1788 1789 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1790 mvmvif->id, 0); 1791 if (ret) 1792 return ret; 1793 1794 /* 1795 * For 22000 firmware and on we cannot add queue to a station unknown 1796 * to firmware so enable queue here - after the station was added 1797 */ 1798 if (iwl_mvm_has_new_tx_api(mvm)) 1799 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue, 1800 mvm->snif_sta.sta_id, 1801 IWL_MVM_TX_FIFO_BE); 1802 1803 return 0; 1804 } 1805 1806 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1807 { 1808 int ret; 1809 1810 lockdep_assert_held(&mvm->mutex); 1811 1812 iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue, 1813 IWL_MAX_TID_COUNT, 0); 1814 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1815 if (ret) 1816 IWL_WARN(mvm, "Failed sending remove station\n"); 1817 1818 return ret; 1819 } 1820 1821 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1822 { 1823 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1824 } 1825 1826 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1827 { 1828 lockdep_assert_held(&mvm->mutex); 1829 1830 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1831 } 1832 1833 /* 1834 * Send the add station command for the vif's broadcast station. 1835 * Assumes that the station was already allocated. 1836 * 1837 * @mvm: the mvm component 1838 * @vif: the interface to which the broadcast station is added 1839 * @bsta: the broadcast station to add. 1840 */ 1841 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1842 { 1843 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1844 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1845 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1846 const u8 *baddr = _baddr; 1847 int queue; 1848 int ret; 1849 unsigned int wdg_timeout = 1850 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1851 struct iwl_trans_txq_scd_cfg cfg = { 1852 .fifo = IWL_MVM_TX_FIFO_VO, 1853 .sta_id = mvmvif->bcast_sta.sta_id, 1854 .tid = IWL_MAX_TID_COUNT, 1855 .aggregate = false, 1856 .frame_limit = IWL_FRAME_LIMIT, 1857 }; 1858 1859 lockdep_assert_held(&mvm->mutex); 1860 1861 if (!iwl_mvm_has_new_tx_api(mvm)) { 1862 if (vif->type == NL80211_IFTYPE_AP || 1863 vif->type == NL80211_IFTYPE_ADHOC) 1864 queue = mvm->probe_queue; 1865 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1866 queue = mvm->p2p_dev_queue; 1867 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 1868 return -EINVAL; 1869 1870 bsta->tfd_queue_msk |= BIT(queue); 1871 1872 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, 1873 &cfg, wdg_timeout); 1874 } 1875 1876 if (vif->type == NL80211_IFTYPE_ADHOC) 1877 baddr = vif->bss_conf.bssid; 1878 1879 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 1880 return -ENOSPC; 1881 1882 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1883 mvmvif->id, mvmvif->color); 1884 if (ret) 1885 return ret; 1886 1887 /* 1888 * For a000 firmware and on we cannot add queue to a station unknown 1889 * to firmware so enable queue here - after the station was added 1890 */ 1891 if (iwl_mvm_has_new_tx_api(mvm)) { 1892 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0], 1893 bsta->sta_id, 1894 IWL_MAX_TID_COUNT, 1895 wdg_timeout); 1896 1897 if (vif->type == NL80211_IFTYPE_AP || 1898 vif->type == NL80211_IFTYPE_ADHOC) 1899 mvm->probe_queue = queue; 1900 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1901 mvm->p2p_dev_queue = queue; 1902 } 1903 1904 return 0; 1905 } 1906 1907 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 1908 struct ieee80211_vif *vif) 1909 { 1910 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1911 int queue; 1912 1913 lockdep_assert_held(&mvm->mutex); 1914 1915 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 1916 1917 switch (vif->type) { 1918 case NL80211_IFTYPE_AP: 1919 case NL80211_IFTYPE_ADHOC: 1920 queue = mvm->probe_queue; 1921 break; 1922 case NL80211_IFTYPE_P2P_DEVICE: 1923 queue = mvm->p2p_dev_queue; 1924 break; 1925 default: 1926 WARN(1, "Can't free bcast queue on vif type %d\n", 1927 vif->type); 1928 return; 1929 } 1930 1931 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0); 1932 if (iwl_mvm_has_new_tx_api(mvm)) 1933 return; 1934 1935 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 1936 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 1937 } 1938 1939 /* Send the FW a request to remove the station from it's internal data 1940 * structures, but DO NOT remove the entry from the local data structures. */ 1941 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1942 { 1943 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1944 int ret; 1945 1946 lockdep_assert_held(&mvm->mutex); 1947 1948 iwl_mvm_free_bcast_sta_queues(mvm, vif); 1949 1950 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1951 if (ret) 1952 IWL_WARN(mvm, "Failed sending remove station\n"); 1953 return ret; 1954 } 1955 1956 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1957 { 1958 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1959 1960 lockdep_assert_held(&mvm->mutex); 1961 1962 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 1963 ieee80211_vif_type_p2p(vif), 1964 IWL_STA_GENERAL_PURPOSE); 1965 } 1966 1967 /* Allocate a new station entry for the broadcast station to the given vif, 1968 * and send it to the FW. 1969 * Note that each P2P mac should have its own broadcast station. 1970 * 1971 * @mvm: the mvm component 1972 * @vif: the interface to which the broadcast station is added 1973 * @bsta: the broadcast station to add. */ 1974 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1975 { 1976 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1977 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1978 int ret; 1979 1980 lockdep_assert_held(&mvm->mutex); 1981 1982 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1983 if (ret) 1984 return ret; 1985 1986 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 1987 1988 if (ret) 1989 iwl_mvm_dealloc_int_sta(mvm, bsta); 1990 1991 return ret; 1992 } 1993 1994 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1995 { 1996 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1997 1998 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 1999 } 2000 2001 /* 2002 * Send the FW a request to remove the station from it's internal data 2003 * structures, and in addition remove it from the local data structure. 2004 */ 2005 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2006 { 2007 int ret; 2008 2009 lockdep_assert_held(&mvm->mutex); 2010 2011 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2012 2013 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2014 2015 return ret; 2016 } 2017 2018 /* 2019 * Allocate a new station entry for the multicast station to the given vif, 2020 * and send it to the FW. 2021 * Note that each AP/GO mac should have its own multicast station. 2022 * 2023 * @mvm: the mvm component 2024 * @vif: the interface to which the multicast station is added 2025 */ 2026 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2027 { 2028 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2029 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2030 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2031 const u8 *maddr = _maddr; 2032 struct iwl_trans_txq_scd_cfg cfg = { 2033 .fifo = IWL_MVM_TX_FIFO_MCAST, 2034 .sta_id = msta->sta_id, 2035 .tid = IWL_MAX_TID_COUNT, 2036 .aggregate = false, 2037 .frame_limit = IWL_FRAME_LIMIT, 2038 }; 2039 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2040 int ret; 2041 2042 lockdep_assert_held(&mvm->mutex); 2043 2044 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2045 vif->type != NL80211_IFTYPE_ADHOC)) 2046 return -ENOTSUPP; 2047 2048 /* 2049 * While in previous FWs we had to exclude cab queue from TFD queue 2050 * mask, now it is needed as any other queue. 2051 */ 2052 if (!iwl_mvm_has_new_tx_api(mvm) && 2053 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2054 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2055 &cfg, timeout); 2056 msta->tfd_queue_msk |= BIT(vif->cab_queue); 2057 } 2058 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2059 mvmvif->id, mvmvif->color); 2060 if (ret) { 2061 iwl_mvm_dealloc_int_sta(mvm, msta); 2062 return ret; 2063 } 2064 2065 /* 2066 * Enable cab queue after the ADD_STA command is sent. 2067 * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG 2068 * command with unknown station id, and for FW that doesn't support 2069 * station API since the cab queue is not included in the 2070 * tfd_queue_mask. 2071 */ 2072 if (iwl_mvm_has_new_tx_api(mvm)) { 2073 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue, 2074 msta->sta_id, 2075 IWL_MAX_TID_COUNT, 2076 timeout); 2077 mvmvif->cab_queue = queue; 2078 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2079 IWL_UCODE_TLV_API_STA_TYPE)) { 2080 /* 2081 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2082 * invalid, so make sure we use the queue we want. 2083 * Note that this is done here as we want to avoid making DQA 2084 * changes in mac80211 layer. 2085 */ 2086 if (vif->type == NL80211_IFTYPE_ADHOC) { 2087 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2088 mvmvif->cab_queue = vif->cab_queue; 2089 } 2090 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2091 &cfg, timeout); 2092 } 2093 2094 return 0; 2095 } 2096 2097 /* 2098 * Send the FW a request to remove the station from it's internal data 2099 * structures, and in addition remove it from the local data structure. 2100 */ 2101 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2102 { 2103 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2104 int ret; 2105 2106 lockdep_assert_held(&mvm->mutex); 2107 2108 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2109 2110 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue, 2111 IWL_MAX_TID_COUNT, 0); 2112 2113 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2114 if (ret) 2115 IWL_WARN(mvm, "Failed sending remove station\n"); 2116 2117 return ret; 2118 } 2119 2120 #define IWL_MAX_RX_BA_SESSIONS 16 2121 2122 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2123 { 2124 struct iwl_mvm_delba_notif notif = { 2125 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2126 .metadata.sync = 1, 2127 .delba.baid = baid, 2128 }; 2129 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2130 }; 2131 2132 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2133 struct iwl_mvm_baid_data *data) 2134 { 2135 int i; 2136 2137 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2138 2139 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2140 int j; 2141 struct iwl_mvm_reorder_buffer *reorder_buf = 2142 &data->reorder_buf[i]; 2143 struct iwl_mvm_reorder_buf_entry *entries = 2144 &data->entries[i * data->entries_per_queue]; 2145 2146 spin_lock_bh(&reorder_buf->lock); 2147 if (likely(!reorder_buf->num_stored)) { 2148 spin_unlock_bh(&reorder_buf->lock); 2149 continue; 2150 } 2151 2152 /* 2153 * This shouldn't happen in regular DELBA since the internal 2154 * delBA notification should trigger a release of all frames in 2155 * the reorder buffer. 2156 */ 2157 WARN_ON(1); 2158 2159 for (j = 0; j < reorder_buf->buf_size; j++) 2160 __skb_queue_purge(&entries[j].e.frames); 2161 /* 2162 * Prevent timer re-arm. This prevents a very far fetched case 2163 * where we timed out on the notification. There may be prior 2164 * RX frames pending in the RX queue before the notification 2165 * that might get processed between now and the actual deletion 2166 * and we would re-arm the timer although we are deleting the 2167 * reorder buffer. 2168 */ 2169 reorder_buf->removed = true; 2170 spin_unlock_bh(&reorder_buf->lock); 2171 del_timer_sync(&reorder_buf->reorder_timer); 2172 } 2173 } 2174 2175 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2176 struct iwl_mvm_baid_data *data, 2177 u16 ssn, u8 buf_size) 2178 { 2179 int i; 2180 2181 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2182 struct iwl_mvm_reorder_buffer *reorder_buf = 2183 &data->reorder_buf[i]; 2184 struct iwl_mvm_reorder_buf_entry *entries = 2185 &data->entries[i * data->entries_per_queue]; 2186 int j; 2187 2188 reorder_buf->num_stored = 0; 2189 reorder_buf->head_sn = ssn; 2190 reorder_buf->buf_size = buf_size; 2191 /* rx reorder timer */ 2192 timer_setup(&reorder_buf->reorder_timer, 2193 iwl_mvm_reorder_timer_expired, 0); 2194 spin_lock_init(&reorder_buf->lock); 2195 reorder_buf->mvm = mvm; 2196 reorder_buf->queue = i; 2197 reorder_buf->valid = false; 2198 for (j = 0; j < reorder_buf->buf_size; j++) 2199 __skb_queue_head_init(&entries[j].e.frames); 2200 } 2201 } 2202 2203 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2204 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2205 { 2206 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2207 struct iwl_mvm_add_sta_cmd cmd = {}; 2208 struct iwl_mvm_baid_data *baid_data = NULL; 2209 int ret; 2210 u32 status; 2211 2212 lockdep_assert_held(&mvm->mutex); 2213 2214 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2215 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2216 return -ENOSPC; 2217 } 2218 2219 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2220 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2221 2222 /* sparse doesn't like the __align() so don't check */ 2223 #ifndef __CHECKER__ 2224 /* 2225 * The division below will be OK if either the cache line size 2226 * can be divided by the entry size (ALIGN will round up) or if 2227 * if the entry size can be divided by the cache line size, in 2228 * which case the ALIGN() will do nothing. 2229 */ 2230 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2231 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2232 #endif 2233 2234 /* 2235 * Upward align the reorder buffer size to fill an entire cache 2236 * line for each queue, to avoid sharing cache lines between 2237 * different queues. 2238 */ 2239 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2240 2241 /* 2242 * Allocate here so if allocation fails we can bail out early 2243 * before starting the BA session in the firmware 2244 */ 2245 baid_data = kzalloc(sizeof(*baid_data) + 2246 mvm->trans->num_rx_queues * 2247 reorder_buf_size, 2248 GFP_KERNEL); 2249 if (!baid_data) 2250 return -ENOMEM; 2251 2252 /* 2253 * This division is why we need the above BUILD_BUG_ON(), 2254 * if that doesn't hold then this will not be right. 2255 */ 2256 baid_data->entries_per_queue = 2257 reorder_buf_size / sizeof(baid_data->entries[0]); 2258 } 2259 2260 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2261 cmd.sta_id = mvm_sta->sta_id; 2262 cmd.add_modify = STA_MODE_MODIFY; 2263 if (start) { 2264 cmd.add_immediate_ba_tid = (u8) tid; 2265 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2266 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2267 } else { 2268 cmd.remove_immediate_ba_tid = (u8) tid; 2269 } 2270 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2271 STA_MODIFY_REMOVE_BA_TID; 2272 2273 status = ADD_STA_SUCCESS; 2274 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2275 iwl_mvm_add_sta_cmd_size(mvm), 2276 &cmd, &status); 2277 if (ret) 2278 goto out_free; 2279 2280 switch (status & IWL_ADD_STA_STATUS_MASK) { 2281 case ADD_STA_SUCCESS: 2282 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2283 start ? "start" : "stopp"); 2284 break; 2285 case ADD_STA_IMMEDIATE_BA_FAILURE: 2286 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2287 ret = -ENOSPC; 2288 break; 2289 default: 2290 ret = -EIO; 2291 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2292 start ? "start" : "stopp", status); 2293 break; 2294 } 2295 2296 if (ret) 2297 goto out_free; 2298 2299 if (start) { 2300 u8 baid; 2301 2302 mvm->rx_ba_sessions++; 2303 2304 if (!iwl_mvm_has_new_rx_api(mvm)) 2305 return 0; 2306 2307 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2308 ret = -EINVAL; 2309 goto out_free; 2310 } 2311 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2312 IWL_ADD_STA_BAID_SHIFT); 2313 baid_data->baid = baid; 2314 baid_data->timeout = timeout; 2315 baid_data->last_rx = jiffies; 2316 baid_data->rcu_ptr = &mvm->baid_map[baid]; 2317 timer_setup(&baid_data->session_timer, 2318 iwl_mvm_rx_agg_session_expired, 0); 2319 baid_data->mvm = mvm; 2320 baid_data->tid = tid; 2321 baid_data->sta_id = mvm_sta->sta_id; 2322 2323 mvm_sta->tid_to_baid[tid] = baid; 2324 if (timeout) 2325 mod_timer(&baid_data->session_timer, 2326 TU_TO_EXP_TIME(timeout * 2)); 2327 2328 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2329 /* 2330 * protect the BA data with RCU to cover a case where our 2331 * internal RX sync mechanism will timeout (not that it's 2332 * supposed to happen) and we will free the session data while 2333 * RX is being processed in parallel 2334 */ 2335 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2336 mvm_sta->sta_id, tid, baid); 2337 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2338 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2339 } else { 2340 u8 baid = mvm_sta->tid_to_baid[tid]; 2341 2342 if (mvm->rx_ba_sessions > 0) 2343 /* check that restart flow didn't zero the counter */ 2344 mvm->rx_ba_sessions--; 2345 if (!iwl_mvm_has_new_rx_api(mvm)) 2346 return 0; 2347 2348 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2349 return -EINVAL; 2350 2351 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2352 if (WARN_ON(!baid_data)) 2353 return -EINVAL; 2354 2355 /* synchronize all rx queues so we can safely delete */ 2356 iwl_mvm_free_reorder(mvm, baid_data); 2357 del_timer_sync(&baid_data->session_timer); 2358 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2359 kfree_rcu(baid_data, rcu_head); 2360 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2361 } 2362 return 0; 2363 2364 out_free: 2365 kfree(baid_data); 2366 return ret; 2367 } 2368 2369 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2370 int tid, u8 queue, bool start) 2371 { 2372 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2373 struct iwl_mvm_add_sta_cmd cmd = {}; 2374 int ret; 2375 u32 status; 2376 2377 lockdep_assert_held(&mvm->mutex); 2378 2379 if (start) { 2380 mvm_sta->tfd_queue_msk |= BIT(queue); 2381 mvm_sta->tid_disable_agg &= ~BIT(tid); 2382 } else { 2383 /* In DQA-mode the queue isn't removed on agg termination */ 2384 mvm_sta->tid_disable_agg |= BIT(tid); 2385 } 2386 2387 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2388 cmd.sta_id = mvm_sta->sta_id; 2389 cmd.add_modify = STA_MODE_MODIFY; 2390 if (!iwl_mvm_has_new_tx_api(mvm)) 2391 cmd.modify_mask = STA_MODIFY_QUEUES; 2392 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2393 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2394 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2395 2396 status = ADD_STA_SUCCESS; 2397 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2398 iwl_mvm_add_sta_cmd_size(mvm), 2399 &cmd, &status); 2400 if (ret) 2401 return ret; 2402 2403 switch (status & IWL_ADD_STA_STATUS_MASK) { 2404 case ADD_STA_SUCCESS: 2405 break; 2406 default: 2407 ret = -EIO; 2408 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2409 start ? "start" : "stopp", status); 2410 break; 2411 } 2412 2413 return ret; 2414 } 2415 2416 const u8 tid_to_mac80211_ac[] = { 2417 IEEE80211_AC_BE, 2418 IEEE80211_AC_BK, 2419 IEEE80211_AC_BK, 2420 IEEE80211_AC_BE, 2421 IEEE80211_AC_VI, 2422 IEEE80211_AC_VI, 2423 IEEE80211_AC_VO, 2424 IEEE80211_AC_VO, 2425 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2426 }; 2427 2428 static const u8 tid_to_ucode_ac[] = { 2429 AC_BE, 2430 AC_BK, 2431 AC_BK, 2432 AC_BE, 2433 AC_VI, 2434 AC_VI, 2435 AC_VO, 2436 AC_VO, 2437 }; 2438 2439 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2440 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2441 { 2442 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2443 struct iwl_mvm_tid_data *tid_data; 2444 u16 normalized_ssn; 2445 int txq_id; 2446 int ret; 2447 2448 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2449 return -EINVAL; 2450 2451 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2452 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2453 IWL_ERR(mvm, 2454 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2455 mvmsta->tid_data[tid].state); 2456 return -ENXIO; 2457 } 2458 2459 lockdep_assert_held(&mvm->mutex); 2460 2461 spin_lock_bh(&mvmsta->lock); 2462 2463 /* possible race condition - we entered D0i3 while starting agg */ 2464 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2465 spin_unlock_bh(&mvmsta->lock); 2466 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2467 return -EIO; 2468 } 2469 2470 spin_lock(&mvm->queue_info_lock); 2471 2472 /* 2473 * Note the possible cases: 2474 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2475 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2476 * one and mark it as reserved 2477 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2478 * non-DQA mode, since the TXQ hasn't yet been allocated 2479 * Don't support case 3 for new TX path as it is not expected to happen 2480 * and aggregation will be offloaded soon anyway 2481 */ 2482 txq_id = mvmsta->tid_data[tid].txq_id; 2483 if (iwl_mvm_has_new_tx_api(mvm)) { 2484 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2485 ret = -ENXIO; 2486 goto release_locks; 2487 } 2488 } else if (unlikely(mvm->queue_info[txq_id].status == 2489 IWL_MVM_QUEUE_SHARED)) { 2490 ret = -ENXIO; 2491 IWL_DEBUG_TX_QUEUES(mvm, 2492 "Can't start tid %d agg on shared queue!\n", 2493 tid); 2494 goto release_locks; 2495 } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2496 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2497 IWL_MVM_DQA_MIN_DATA_QUEUE, 2498 IWL_MVM_DQA_MAX_DATA_QUEUE); 2499 if (txq_id < 0) { 2500 ret = txq_id; 2501 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2502 goto release_locks; 2503 } 2504 /* 2505 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2506 * an inactive queue from iwl_mvm_find_free_queue() is 2507 * certainly a bug 2508 */ 2509 WARN_ON(mvm->queue_info[txq_id].status == 2510 IWL_MVM_QUEUE_INACTIVE); 2511 2512 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2513 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2514 } 2515 2516 spin_unlock(&mvm->queue_info_lock); 2517 2518 IWL_DEBUG_TX_QUEUES(mvm, 2519 "AGG for tid %d will be on queue #%d\n", 2520 tid, txq_id); 2521 2522 tid_data = &mvmsta->tid_data[tid]; 2523 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2524 tid_data->txq_id = txq_id; 2525 *ssn = tid_data->ssn; 2526 2527 IWL_DEBUG_TX_QUEUES(mvm, 2528 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2529 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2530 tid_data->next_reclaimed); 2531 2532 /* 2533 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 2534 * to align the wrap around of ssn so we compare relevant values. 2535 */ 2536 normalized_ssn = tid_data->ssn; 2537 if (mvm->trans->cfg->gen2) 2538 normalized_ssn &= 0xff; 2539 2540 if (normalized_ssn == tid_data->next_reclaimed) { 2541 tid_data->state = IWL_AGG_STARTING; 2542 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2543 } else { 2544 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2545 } 2546 2547 ret = 0; 2548 goto out; 2549 2550 release_locks: 2551 spin_unlock(&mvm->queue_info_lock); 2552 out: 2553 spin_unlock_bh(&mvmsta->lock); 2554 2555 return ret; 2556 } 2557 2558 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2559 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2560 bool amsdu) 2561 { 2562 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2563 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2564 unsigned int wdg_timeout = 2565 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2566 int queue, ret; 2567 bool alloc_queue = true; 2568 enum iwl_mvm_queue_status queue_status; 2569 u16 ssn; 2570 2571 struct iwl_trans_txq_scd_cfg cfg = { 2572 .sta_id = mvmsta->sta_id, 2573 .tid = tid, 2574 .frame_limit = buf_size, 2575 .aggregate = true, 2576 }; 2577 2578 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2579 != IWL_MAX_TID_COUNT); 2580 2581 spin_lock_bh(&mvmsta->lock); 2582 ssn = tid_data->ssn; 2583 queue = tid_data->txq_id; 2584 tid_data->state = IWL_AGG_ON; 2585 mvmsta->agg_tids |= BIT(tid); 2586 tid_data->ssn = 0xffff; 2587 tid_data->amsdu_in_ampdu_allowed = amsdu; 2588 spin_unlock_bh(&mvmsta->lock); 2589 2590 if (iwl_mvm_has_new_tx_api(mvm)) { 2591 /* 2592 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start() 2593 * would have failed, so if we are here there is no need to 2594 * allocate a queue. 2595 * However, if aggregation size is different than the default 2596 * size, the scheduler should be reconfigured. 2597 * We cannot do this with the new TX API, so return unsupported 2598 * for now, until it will be offloaded to firmware.. 2599 * Note that if SCD default value changes - this condition 2600 * should be updated as well. 2601 */ 2602 if (buf_size < IWL_FRAME_LIMIT) 2603 return -ENOTSUPP; 2604 2605 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2606 if (ret) 2607 return -EIO; 2608 goto out; 2609 } 2610 2611 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2612 2613 spin_lock_bh(&mvm->queue_info_lock); 2614 queue_status = mvm->queue_info[queue].status; 2615 spin_unlock_bh(&mvm->queue_info_lock); 2616 2617 /* Maybe there is no need to even alloc a queue... */ 2618 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2619 alloc_queue = false; 2620 2621 /* 2622 * Only reconfig the SCD for the queue if the window size has 2623 * changed from current (become smaller) 2624 */ 2625 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) { 2626 /* 2627 * If reconfiguring an existing queue, it first must be 2628 * drained 2629 */ 2630 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2631 BIT(queue)); 2632 if (ret) { 2633 IWL_ERR(mvm, 2634 "Error draining queue before reconfig\n"); 2635 return ret; 2636 } 2637 2638 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2639 mvmsta->sta_id, tid, 2640 buf_size, ssn); 2641 if (ret) { 2642 IWL_ERR(mvm, 2643 "Error reconfiguring TXQ #%d\n", queue); 2644 return ret; 2645 } 2646 } 2647 2648 if (alloc_queue) 2649 iwl_mvm_enable_txq(mvm, queue, 2650 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2651 &cfg, wdg_timeout); 2652 2653 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2654 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2655 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2656 if (ret) 2657 return -EIO; 2658 } 2659 2660 /* No need to mark as reserved */ 2661 spin_lock_bh(&mvm->queue_info_lock); 2662 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2663 spin_unlock_bh(&mvm->queue_info_lock); 2664 2665 out: 2666 /* 2667 * Even though in theory the peer could have different 2668 * aggregation reorder buffer sizes for different sessions, 2669 * our ucode doesn't allow for that and has a global limit 2670 * for each station. Therefore, use the minimum of all the 2671 * aggregation sessions and our default value. 2672 */ 2673 mvmsta->max_agg_bufsize = 2674 min(mvmsta->max_agg_bufsize, buf_size); 2675 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2676 2677 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2678 sta->addr, tid); 2679 2680 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2681 } 2682 2683 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2684 struct iwl_mvm_sta *mvmsta, 2685 u16 txq_id) 2686 { 2687 if (iwl_mvm_has_new_tx_api(mvm)) 2688 return; 2689 2690 spin_lock_bh(&mvm->queue_info_lock); 2691 /* 2692 * The TXQ is marked as reserved only if no traffic came through yet 2693 * This means no traffic has been sent on this TID (agg'd or not), so 2694 * we no longer have use for the queue. Since it hasn't even been 2695 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2696 * free. 2697 */ 2698 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2699 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2700 2701 spin_unlock_bh(&mvm->queue_info_lock); 2702 } 2703 2704 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2705 struct ieee80211_sta *sta, u16 tid) 2706 { 2707 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2708 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2709 u16 txq_id; 2710 int err; 2711 2712 /* 2713 * If mac80211 is cleaning its state, then say that we finished since 2714 * our state has been cleared anyway. 2715 */ 2716 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2717 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2718 return 0; 2719 } 2720 2721 spin_lock_bh(&mvmsta->lock); 2722 2723 txq_id = tid_data->txq_id; 2724 2725 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2726 mvmsta->sta_id, tid, txq_id, tid_data->state); 2727 2728 mvmsta->agg_tids &= ~BIT(tid); 2729 2730 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2731 2732 switch (tid_data->state) { 2733 case IWL_AGG_ON: 2734 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2735 2736 IWL_DEBUG_TX_QUEUES(mvm, 2737 "ssn = %d, next_recl = %d\n", 2738 tid_data->ssn, tid_data->next_reclaimed); 2739 2740 tid_data->ssn = 0xffff; 2741 tid_data->state = IWL_AGG_OFF; 2742 spin_unlock_bh(&mvmsta->lock); 2743 2744 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2745 2746 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2747 return 0; 2748 case IWL_AGG_STARTING: 2749 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2750 /* 2751 * The agg session has been stopped before it was set up. This 2752 * can happen when the AddBA timer times out for example. 2753 */ 2754 2755 /* No barriers since we are under mutex */ 2756 lockdep_assert_held(&mvm->mutex); 2757 2758 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2759 tid_data->state = IWL_AGG_OFF; 2760 err = 0; 2761 break; 2762 default: 2763 IWL_ERR(mvm, 2764 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2765 mvmsta->sta_id, tid, tid_data->state); 2766 IWL_ERR(mvm, 2767 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2768 err = -EINVAL; 2769 } 2770 2771 spin_unlock_bh(&mvmsta->lock); 2772 2773 return err; 2774 } 2775 2776 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2777 struct ieee80211_sta *sta, u16 tid) 2778 { 2779 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2780 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2781 u16 txq_id; 2782 enum iwl_mvm_agg_state old_state; 2783 2784 /* 2785 * First set the agg state to OFF to avoid calling 2786 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2787 */ 2788 spin_lock_bh(&mvmsta->lock); 2789 txq_id = tid_data->txq_id; 2790 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2791 mvmsta->sta_id, tid, txq_id, tid_data->state); 2792 old_state = tid_data->state; 2793 tid_data->state = IWL_AGG_OFF; 2794 mvmsta->agg_tids &= ~BIT(tid); 2795 spin_unlock_bh(&mvmsta->lock); 2796 2797 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2798 2799 if (old_state >= IWL_AGG_ON) { 2800 iwl_mvm_drain_sta(mvm, mvmsta, true); 2801 2802 if (iwl_mvm_has_new_tx_api(mvm)) { 2803 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2804 BIT(tid), 0)) 2805 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2806 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2807 } else { 2808 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2809 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2810 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2811 } 2812 2813 iwl_mvm_drain_sta(mvm, mvmsta, false); 2814 2815 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2816 } 2817 2818 return 0; 2819 } 2820 2821 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2822 { 2823 int i, max = -1, max_offs = -1; 2824 2825 lockdep_assert_held(&mvm->mutex); 2826 2827 /* Pick the unused key offset with the highest 'deleted' 2828 * counter. Every time a key is deleted, all the counters 2829 * are incremented and the one that was just deleted is 2830 * reset to zero. Thus, the highest counter is the one 2831 * that was deleted longest ago. Pick that one. 2832 */ 2833 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2834 if (test_bit(i, mvm->fw_key_table)) 2835 continue; 2836 if (mvm->fw_key_deleted[i] > max) { 2837 max = mvm->fw_key_deleted[i]; 2838 max_offs = i; 2839 } 2840 } 2841 2842 if (max_offs < 0) 2843 return STA_KEY_IDX_INVALID; 2844 2845 return max_offs; 2846 } 2847 2848 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2849 struct ieee80211_vif *vif, 2850 struct ieee80211_sta *sta) 2851 { 2852 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2853 2854 if (sta) 2855 return iwl_mvm_sta_from_mac80211(sta); 2856 2857 /* 2858 * The device expects GTKs for station interfaces to be 2859 * installed as GTKs for the AP station. If we have no 2860 * station ID, then use AP's station ID. 2861 */ 2862 if (vif->type == NL80211_IFTYPE_STATION && 2863 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 2864 u8 sta_id = mvmvif->ap_sta_id; 2865 2866 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2867 lockdep_is_held(&mvm->mutex)); 2868 2869 /* 2870 * It is possible that the 'sta' parameter is NULL, 2871 * for example when a GTK is removed - the sta_id will then 2872 * be the AP ID, and no station was passed by mac80211. 2873 */ 2874 if (IS_ERR_OR_NULL(sta)) 2875 return NULL; 2876 2877 return iwl_mvm_sta_from_mac80211(sta); 2878 } 2879 2880 return NULL; 2881 } 2882 2883 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2884 u32 sta_id, 2885 struct ieee80211_key_conf *key, bool mcast, 2886 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2887 u8 key_offset) 2888 { 2889 union { 2890 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2891 struct iwl_mvm_add_sta_key_cmd cmd; 2892 } u = {}; 2893 __le16 key_flags; 2894 int ret; 2895 u32 status; 2896 u16 keyidx; 2897 u64 pn = 0; 2898 int i, size; 2899 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2900 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2901 2902 if (sta_id == IWL_MVM_INVALID_STA) 2903 return -EINVAL; 2904 2905 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 2906 STA_KEY_FLG_KEYID_MSK; 2907 key_flags = cpu_to_le16(keyidx); 2908 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2909 2910 switch (key->cipher) { 2911 case WLAN_CIPHER_SUITE_TKIP: 2912 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2913 if (new_api) { 2914 memcpy((void *)&u.cmd.tx_mic_key, 2915 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 2916 IWL_MIC_KEY_SIZE); 2917 2918 memcpy((void *)&u.cmd.rx_mic_key, 2919 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 2920 IWL_MIC_KEY_SIZE); 2921 pn = atomic64_read(&key->tx_pn); 2922 2923 } else { 2924 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 2925 for (i = 0; i < 5; i++) 2926 u.cmd_v1.tkip_rx_ttak[i] = 2927 cpu_to_le16(tkip_p1k[i]); 2928 } 2929 memcpy(u.cmd.common.key, key->key, key->keylen); 2930 break; 2931 case WLAN_CIPHER_SUITE_CCMP: 2932 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2933 memcpy(u.cmd.common.key, key->key, key->keylen); 2934 if (new_api) 2935 pn = atomic64_read(&key->tx_pn); 2936 break; 2937 case WLAN_CIPHER_SUITE_WEP104: 2938 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2939 /* fall through */ 2940 case WLAN_CIPHER_SUITE_WEP40: 2941 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2942 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 2943 break; 2944 case WLAN_CIPHER_SUITE_GCMP_256: 2945 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2946 /* fall through */ 2947 case WLAN_CIPHER_SUITE_GCMP: 2948 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2949 memcpy(u.cmd.common.key, key->key, key->keylen); 2950 if (new_api) 2951 pn = atomic64_read(&key->tx_pn); 2952 break; 2953 default: 2954 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2955 memcpy(u.cmd.common.key, key->key, key->keylen); 2956 } 2957 2958 if (mcast) 2959 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2960 2961 u.cmd.common.key_offset = key_offset; 2962 u.cmd.common.key_flags = key_flags; 2963 u.cmd.common.sta_id = sta_id; 2964 2965 if (new_api) { 2966 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 2967 size = sizeof(u.cmd); 2968 } else { 2969 size = sizeof(u.cmd_v1); 2970 } 2971 2972 status = ADD_STA_SUCCESS; 2973 if (cmd_flags & CMD_ASYNC) 2974 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 2975 &u.cmd); 2976 else 2977 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 2978 &u.cmd, &status); 2979 2980 switch (status) { 2981 case ADD_STA_SUCCESS: 2982 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2983 break; 2984 default: 2985 ret = -EIO; 2986 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2987 break; 2988 } 2989 2990 return ret; 2991 } 2992 2993 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2994 struct ieee80211_key_conf *keyconf, 2995 u8 sta_id, bool remove_key) 2996 { 2997 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 2998 2999 /* verify the key details match the required command's expectations */ 3000 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3001 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3002 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3003 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3004 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3005 return -EINVAL; 3006 3007 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3008 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3009 return -EINVAL; 3010 3011 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3012 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3013 3014 if (remove_key) { 3015 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3016 } else { 3017 struct ieee80211_key_seq seq; 3018 const u8 *pn; 3019 3020 switch (keyconf->cipher) { 3021 case WLAN_CIPHER_SUITE_AES_CMAC: 3022 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3023 break; 3024 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3025 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3026 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3027 break; 3028 default: 3029 return -EINVAL; 3030 } 3031 3032 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3033 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3034 igtk_cmd.ctrl_flags |= 3035 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3036 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3037 pn = seq.aes_cmac.pn; 3038 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3039 ((u64) pn[4] << 8) | 3040 ((u64) pn[3] << 16) | 3041 ((u64) pn[2] << 24) | 3042 ((u64) pn[1] << 32) | 3043 ((u64) pn[0] << 40)); 3044 } 3045 3046 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3047 remove_key ? "removing" : "installing", 3048 igtk_cmd.sta_id); 3049 3050 if (!iwl_mvm_has_new_rx_api(mvm)) { 3051 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3052 .ctrl_flags = igtk_cmd.ctrl_flags, 3053 .key_id = igtk_cmd.key_id, 3054 .sta_id = igtk_cmd.sta_id, 3055 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3056 }; 3057 3058 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3059 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3060 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3061 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3062 } 3063 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3064 sizeof(igtk_cmd), &igtk_cmd); 3065 } 3066 3067 3068 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3069 struct ieee80211_vif *vif, 3070 struct ieee80211_sta *sta) 3071 { 3072 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3073 3074 if (sta) 3075 return sta->addr; 3076 3077 if (vif->type == NL80211_IFTYPE_STATION && 3078 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3079 u8 sta_id = mvmvif->ap_sta_id; 3080 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3081 lockdep_is_held(&mvm->mutex)); 3082 return sta->addr; 3083 } 3084 3085 3086 return NULL; 3087 } 3088 3089 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3090 struct ieee80211_vif *vif, 3091 struct ieee80211_sta *sta, 3092 struct ieee80211_key_conf *keyconf, 3093 u8 key_offset, 3094 bool mcast) 3095 { 3096 int ret; 3097 const u8 *addr; 3098 struct ieee80211_key_seq seq; 3099 u16 p1k[5]; 3100 u32 sta_id; 3101 3102 if (sta) { 3103 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3104 3105 sta_id = mvm_sta->sta_id; 3106 } else if (vif->type == NL80211_IFTYPE_AP && 3107 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3109 3110 sta_id = mvmvif->mcast_sta.sta_id; 3111 } else { 3112 IWL_ERR(mvm, "Failed to find station id\n"); 3113 return -EINVAL; 3114 } 3115 3116 switch (keyconf->cipher) { 3117 case WLAN_CIPHER_SUITE_TKIP: 3118 if (vif->type == NL80211_IFTYPE_AP) { 3119 ret = -EINVAL; 3120 break; 3121 } 3122 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3123 /* get phase 1 key from mac80211 */ 3124 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3125 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3126 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3127 seq.tkip.iv32, p1k, 0, key_offset); 3128 break; 3129 case WLAN_CIPHER_SUITE_CCMP: 3130 case WLAN_CIPHER_SUITE_WEP40: 3131 case WLAN_CIPHER_SUITE_WEP104: 3132 case WLAN_CIPHER_SUITE_GCMP: 3133 case WLAN_CIPHER_SUITE_GCMP_256: 3134 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3135 0, NULL, 0, key_offset); 3136 break; 3137 default: 3138 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3139 0, NULL, 0, key_offset); 3140 } 3141 3142 return ret; 3143 } 3144 3145 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3146 struct ieee80211_key_conf *keyconf, 3147 bool mcast) 3148 { 3149 union { 3150 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3151 struct iwl_mvm_add_sta_key_cmd cmd; 3152 } u = {}; 3153 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3154 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3155 __le16 key_flags; 3156 int ret, size; 3157 u32 status; 3158 3159 if (sta_id == IWL_MVM_INVALID_STA) 3160 return -EINVAL; 3161 3162 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3163 STA_KEY_FLG_KEYID_MSK); 3164 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3165 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3166 3167 if (mcast) 3168 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3169 3170 /* 3171 * The fields assigned here are in the same location at the start 3172 * of the command, so we can do this union trick. 3173 */ 3174 u.cmd.common.key_flags = key_flags; 3175 u.cmd.common.key_offset = keyconf->hw_key_idx; 3176 u.cmd.common.sta_id = sta_id; 3177 3178 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3179 3180 status = ADD_STA_SUCCESS; 3181 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3182 &status); 3183 3184 switch (status) { 3185 case ADD_STA_SUCCESS: 3186 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3187 break; 3188 default: 3189 ret = -EIO; 3190 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3191 break; 3192 } 3193 3194 return ret; 3195 } 3196 3197 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3198 struct ieee80211_vif *vif, 3199 struct ieee80211_sta *sta, 3200 struct ieee80211_key_conf *keyconf, 3201 u8 key_offset) 3202 { 3203 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3204 struct iwl_mvm_sta *mvm_sta; 3205 u8 sta_id = IWL_MVM_INVALID_STA; 3206 int ret; 3207 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3208 3209 lockdep_assert_held(&mvm->mutex); 3210 3211 if (vif->type != NL80211_IFTYPE_AP || 3212 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3213 /* Get the station id from the mvm local station table */ 3214 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3215 if (!mvm_sta) { 3216 IWL_ERR(mvm, "Failed to find station\n"); 3217 return -EINVAL; 3218 } 3219 sta_id = mvm_sta->sta_id; 3220 3221 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3222 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3223 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3224 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, 3225 false); 3226 goto end; 3227 } 3228 3229 /* 3230 * It is possible that the 'sta' parameter is NULL, and thus 3231 * there is a need to retrieve the sta from the local station 3232 * table. 3233 */ 3234 if (!sta) { 3235 sta = rcu_dereference_protected( 3236 mvm->fw_id_to_mac_id[sta_id], 3237 lockdep_is_held(&mvm->mutex)); 3238 if (IS_ERR_OR_NULL(sta)) { 3239 IWL_ERR(mvm, "Invalid station id\n"); 3240 return -EINVAL; 3241 } 3242 } 3243 3244 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3245 return -EINVAL; 3246 } 3247 3248 /* If the key_offset is not pre-assigned, we need to find a 3249 * new offset to use. In normal cases, the offset is not 3250 * pre-assigned, but during HW_RESTART we want to reuse the 3251 * same indices, so we pass them when this function is called. 3252 * 3253 * In D3 entry, we need to hardcoded the indices (because the 3254 * firmware hardcodes the PTK offset to 0). In this case, we 3255 * need to make sure we don't overwrite the hw_key_idx in the 3256 * keyconf structure, because otherwise we cannot configure 3257 * the original ones back when resuming. 3258 */ 3259 if (key_offset == STA_KEY_IDX_INVALID) { 3260 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3261 if (key_offset == STA_KEY_IDX_INVALID) 3262 return -ENOSPC; 3263 keyconf->hw_key_idx = key_offset; 3264 } 3265 3266 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3267 if (ret) 3268 goto end; 3269 3270 /* 3271 * For WEP, the same key is used for multicast and unicast. Upload it 3272 * again, using the same key offset, and now pointing the other one 3273 * to the same key slot (offset). 3274 * If this fails, remove the original as well. 3275 */ 3276 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3277 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3278 sta) { 3279 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3280 key_offset, !mcast); 3281 if (ret) { 3282 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3283 goto end; 3284 } 3285 } 3286 3287 __set_bit(key_offset, mvm->fw_key_table); 3288 3289 end: 3290 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3291 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3292 sta ? sta->addr : zero_addr, ret); 3293 return ret; 3294 } 3295 3296 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3297 struct ieee80211_vif *vif, 3298 struct ieee80211_sta *sta, 3299 struct ieee80211_key_conf *keyconf) 3300 { 3301 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3302 struct iwl_mvm_sta *mvm_sta; 3303 u8 sta_id = IWL_MVM_INVALID_STA; 3304 int ret, i; 3305 3306 lockdep_assert_held(&mvm->mutex); 3307 3308 /* Get the station from the mvm local station table */ 3309 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3310 if (mvm_sta) 3311 sta_id = mvm_sta->sta_id; 3312 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3313 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3314 3315 3316 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3317 keyconf->keyidx, sta_id); 3318 3319 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3320 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3321 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3322 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3323 3324 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3325 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3326 keyconf->hw_key_idx); 3327 return -ENOENT; 3328 } 3329 3330 /* track which key was deleted last */ 3331 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3332 if (mvm->fw_key_deleted[i] < U8_MAX) 3333 mvm->fw_key_deleted[i]++; 3334 } 3335 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3336 3337 if (sta && !mvm_sta) { 3338 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3339 return 0; 3340 } 3341 3342 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3343 if (ret) 3344 return ret; 3345 3346 /* delete WEP key twice to get rid of (now useless) offset */ 3347 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3348 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3349 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3350 3351 return ret; 3352 } 3353 3354 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3355 struct ieee80211_vif *vif, 3356 struct ieee80211_key_conf *keyconf, 3357 struct ieee80211_sta *sta, u32 iv32, 3358 u16 *phase1key) 3359 { 3360 struct iwl_mvm_sta *mvm_sta; 3361 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3362 3363 rcu_read_lock(); 3364 3365 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3366 if (WARN_ON_ONCE(!mvm_sta)) 3367 goto unlock; 3368 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3369 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3370 3371 unlock: 3372 rcu_read_unlock(); 3373 } 3374 3375 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3376 struct ieee80211_sta *sta) 3377 { 3378 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3379 struct iwl_mvm_add_sta_cmd cmd = { 3380 .add_modify = STA_MODE_MODIFY, 3381 .sta_id = mvmsta->sta_id, 3382 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3383 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3384 }; 3385 int ret; 3386 3387 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3388 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3389 if (ret) 3390 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3391 } 3392 3393 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3394 struct ieee80211_sta *sta, 3395 enum ieee80211_frame_release_type reason, 3396 u16 cnt, u16 tids, bool more_data, 3397 bool single_sta_queue) 3398 { 3399 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3400 struct iwl_mvm_add_sta_cmd cmd = { 3401 .add_modify = STA_MODE_MODIFY, 3402 .sta_id = mvmsta->sta_id, 3403 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3404 .sleep_tx_count = cpu_to_le16(cnt), 3405 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3406 }; 3407 int tid, ret; 3408 unsigned long _tids = tids; 3409 3410 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3411 * Note that this field is reserved and unused by firmware not 3412 * supporting GO uAPSD, so it's safe to always do this. 3413 */ 3414 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3415 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3416 3417 /* If we're releasing frames from aggregation or dqa queues then check 3418 * if all the queues that we're releasing frames from, combined, have: 3419 * - more frames than the service period, in which case more_data 3420 * needs to be set 3421 * - fewer than 'cnt' frames, in which case we need to adjust the 3422 * firmware command (but do that unconditionally) 3423 */ 3424 if (single_sta_queue) { 3425 int remaining = cnt; 3426 int sleep_tx_count; 3427 3428 spin_lock_bh(&mvmsta->lock); 3429 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3430 struct iwl_mvm_tid_data *tid_data; 3431 u16 n_queued; 3432 3433 tid_data = &mvmsta->tid_data[tid]; 3434 3435 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3436 if (n_queued > remaining) { 3437 more_data = true; 3438 remaining = 0; 3439 break; 3440 } 3441 remaining -= n_queued; 3442 } 3443 sleep_tx_count = cnt - remaining; 3444 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3445 mvmsta->sleep_tx_count = sleep_tx_count; 3446 spin_unlock_bh(&mvmsta->lock); 3447 3448 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3449 if (WARN_ON(cnt - remaining == 0)) { 3450 ieee80211_sta_eosp(sta); 3451 return; 3452 } 3453 } 3454 3455 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3456 if (more_data) 3457 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3458 3459 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3460 mvmsta->next_status_eosp = true; 3461 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3462 } else { 3463 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3464 } 3465 3466 /* block the Tx queues until the FW updated the sleep Tx count */ 3467 iwl_trans_block_txq_ptrs(mvm->trans, true); 3468 3469 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3470 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3471 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3472 if (ret) 3473 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3474 } 3475 3476 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3477 struct iwl_rx_cmd_buffer *rxb) 3478 { 3479 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3480 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3481 struct ieee80211_sta *sta; 3482 u32 sta_id = le32_to_cpu(notif->sta_id); 3483 3484 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3485 return; 3486 3487 rcu_read_lock(); 3488 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3489 if (!IS_ERR_OR_NULL(sta)) 3490 ieee80211_sta_eosp(sta); 3491 rcu_read_unlock(); 3492 } 3493 3494 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3495 struct iwl_mvm_sta *mvmsta, bool disable) 3496 { 3497 struct iwl_mvm_add_sta_cmd cmd = { 3498 .add_modify = STA_MODE_MODIFY, 3499 .sta_id = mvmsta->sta_id, 3500 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3501 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3502 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3503 }; 3504 int ret; 3505 3506 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3507 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3508 if (ret) 3509 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3510 } 3511 3512 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3513 struct ieee80211_sta *sta, 3514 bool disable) 3515 { 3516 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3517 3518 spin_lock_bh(&mvm_sta->lock); 3519 3520 if (mvm_sta->disable_tx == disable) { 3521 spin_unlock_bh(&mvm_sta->lock); 3522 return; 3523 } 3524 3525 mvm_sta->disable_tx = disable; 3526 3527 /* Tell mac80211 to start/stop queuing tx for this station */ 3528 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3529 3530 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3531 3532 spin_unlock_bh(&mvm_sta->lock); 3533 } 3534 3535 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3536 struct iwl_mvm_vif *mvmvif, 3537 struct iwl_mvm_int_sta *sta, 3538 bool disable) 3539 { 3540 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3541 struct iwl_mvm_add_sta_cmd cmd = { 3542 .add_modify = STA_MODE_MODIFY, 3543 .sta_id = sta->sta_id, 3544 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3545 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3546 .mac_id_n_color = cpu_to_le32(id), 3547 }; 3548 int ret; 3549 3550 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3551 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3552 if (ret) 3553 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3554 } 3555 3556 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3557 struct iwl_mvm_vif *mvmvif, 3558 bool disable) 3559 { 3560 struct ieee80211_sta *sta; 3561 struct iwl_mvm_sta *mvm_sta; 3562 int i; 3563 3564 lockdep_assert_held(&mvm->mutex); 3565 3566 /* Block/unblock all the stations of the given mvmvif */ 3567 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3568 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3569 lockdep_is_held(&mvm->mutex)); 3570 if (IS_ERR_OR_NULL(sta)) 3571 continue; 3572 3573 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3574 if (mvm_sta->mac_id_n_color != 3575 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3576 continue; 3577 3578 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3579 } 3580 3581 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3582 return; 3583 3584 /* Need to block/unblock also multicast station */ 3585 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3586 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3587 &mvmvif->mcast_sta, disable); 3588 3589 /* 3590 * Only unblock the broadcast station (FW blocks it for immediate 3591 * quiet, not the driver) 3592 */ 3593 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3594 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3595 &mvmvif->bcast_sta, disable); 3596 } 3597 3598 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3599 { 3600 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3601 struct iwl_mvm_sta *mvmsta; 3602 3603 rcu_read_lock(); 3604 3605 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3606 3607 if (!WARN_ON(!mvmsta)) 3608 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3609 3610 rcu_read_unlock(); 3611 } 3612 3613 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3614 { 3615 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3616 3617 /* 3618 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 3619 * to align the wrap around of ssn so we compare relevant values. 3620 */ 3621 if (mvm->trans->cfg->gen2) 3622 sn &= 0xff; 3623 3624 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3625 } 3626