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