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(unsigned long data) 256 { 257 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data; 258 struct iwl_mvm_baid_data *ba_data; 259 struct ieee80211_sta *sta; 260 struct iwl_mvm_sta *mvm_sta; 261 unsigned long timeout; 262 263 rcu_read_lock(); 264 265 ba_data = rcu_dereference(*rcu_ptr); 266 267 if (WARN_ON(!ba_data)) 268 goto unlock; 269 270 if (!ba_data->timeout) 271 goto unlock; 272 273 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); 274 if (time_is_after_jiffies(timeout)) { 275 mod_timer(&ba_data->session_timer, timeout); 276 goto unlock; 277 } 278 279 /* Timer expired */ 280 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); 281 282 /* 283 * sta should be valid unless the following happens: 284 * The firmware asserts which triggers a reconfig flow, but 285 * the reconfig fails before we set the pointer to sta into 286 * the fw_id_to_mac_id pointer table. Mac80211 can't stop 287 * A-MDPU and hence the timer continues to run. Then, the 288 * timer expires and sta is NULL. 289 */ 290 if (!sta) 291 goto unlock; 292 293 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 294 ieee80211_rx_ba_timer_expired(mvm_sta->vif, 295 sta->addr, ba_data->tid); 296 unlock: 297 rcu_read_unlock(); 298 } 299 300 /* Disable aggregations for a bitmap of TIDs for a given station */ 301 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 302 unsigned long disable_agg_tids, 303 bool remove_queue) 304 { 305 struct iwl_mvm_add_sta_cmd cmd = {}; 306 struct ieee80211_sta *sta; 307 struct iwl_mvm_sta *mvmsta; 308 u32 status; 309 u8 sta_id; 310 int ret; 311 312 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 313 return -EINVAL; 314 315 spin_lock_bh(&mvm->queue_info_lock); 316 sta_id = mvm->queue_info[queue].ra_sta_id; 317 spin_unlock_bh(&mvm->queue_info_lock); 318 319 rcu_read_lock(); 320 321 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 322 323 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 324 rcu_read_unlock(); 325 return -EINVAL; 326 } 327 328 mvmsta = iwl_mvm_sta_from_mac80211(sta); 329 330 mvmsta->tid_disable_agg |= disable_agg_tids; 331 332 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 333 cmd.sta_id = mvmsta->sta_id; 334 cmd.add_modify = STA_MODE_MODIFY; 335 cmd.modify_mask = STA_MODIFY_QUEUES; 336 if (disable_agg_tids) 337 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 338 if (remove_queue) 339 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 340 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 341 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 342 343 rcu_read_unlock(); 344 345 /* Notify FW of queue removal from the STA queues */ 346 status = ADD_STA_SUCCESS; 347 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 348 iwl_mvm_add_sta_cmd_size(mvm), 349 &cmd, &status); 350 351 return ret; 352 } 353 354 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 355 { 356 struct ieee80211_sta *sta; 357 struct iwl_mvm_sta *mvmsta; 358 unsigned long tid_bitmap; 359 unsigned long agg_tids = 0; 360 u8 sta_id; 361 int tid; 362 363 lockdep_assert_held(&mvm->mutex); 364 365 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 366 return -EINVAL; 367 368 spin_lock_bh(&mvm->queue_info_lock); 369 sta_id = mvm->queue_info[queue].ra_sta_id; 370 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 371 spin_unlock_bh(&mvm->queue_info_lock); 372 373 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 374 lockdep_is_held(&mvm->mutex)); 375 376 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 377 return -EINVAL; 378 379 mvmsta = iwl_mvm_sta_from_mac80211(sta); 380 381 spin_lock_bh(&mvmsta->lock); 382 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 383 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 384 agg_tids |= BIT(tid); 385 } 386 spin_unlock_bh(&mvmsta->lock); 387 388 return agg_tids; 389 } 390 391 /* 392 * Remove a queue from a station's resources. 393 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 394 * doesn't disable the queue 395 */ 396 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 397 { 398 struct ieee80211_sta *sta; 399 struct iwl_mvm_sta *mvmsta; 400 unsigned long tid_bitmap; 401 unsigned long disable_agg_tids = 0; 402 u8 sta_id; 403 int tid; 404 405 lockdep_assert_held(&mvm->mutex); 406 407 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 408 return -EINVAL; 409 410 spin_lock_bh(&mvm->queue_info_lock); 411 sta_id = mvm->queue_info[queue].ra_sta_id; 412 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 413 spin_unlock_bh(&mvm->queue_info_lock); 414 415 rcu_read_lock(); 416 417 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 418 419 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 420 rcu_read_unlock(); 421 return 0; 422 } 423 424 mvmsta = iwl_mvm_sta_from_mac80211(sta); 425 426 spin_lock_bh(&mvmsta->lock); 427 /* Unmap MAC queues and TIDs from this queue */ 428 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 429 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 430 disable_agg_tids |= BIT(tid); 431 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 432 } 433 434 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 435 spin_unlock_bh(&mvmsta->lock); 436 437 rcu_read_unlock(); 438 439 return disable_agg_tids; 440 } 441 442 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 443 bool same_sta) 444 { 445 struct iwl_mvm_sta *mvmsta; 446 u8 txq_curr_ac, sta_id, tid; 447 unsigned long disable_agg_tids = 0; 448 int ret; 449 450 lockdep_assert_held(&mvm->mutex); 451 452 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 453 return -EINVAL; 454 455 spin_lock_bh(&mvm->queue_info_lock); 456 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 457 sta_id = mvm->queue_info[queue].ra_sta_id; 458 tid = mvm->queue_info[queue].txq_tid; 459 spin_unlock_bh(&mvm->queue_info_lock); 460 461 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 462 if (WARN_ON(!mvmsta)) 463 return -EINVAL; 464 465 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 466 /* Disable the queue */ 467 if (disable_agg_tids) 468 iwl_mvm_invalidate_sta_queue(mvm, queue, 469 disable_agg_tids, false); 470 471 ret = iwl_mvm_disable_txq(mvm, queue, 472 mvmsta->vif->hw_queue[txq_curr_ac], 473 tid, 0); 474 if (ret) { 475 /* Re-mark the inactive queue as inactive */ 476 spin_lock_bh(&mvm->queue_info_lock); 477 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 478 spin_unlock_bh(&mvm->queue_info_lock); 479 IWL_ERR(mvm, 480 "Failed to free inactive queue %d (ret=%d)\n", 481 queue, ret); 482 483 return ret; 484 } 485 486 /* If TXQ is allocated to another STA, update removal in FW */ 487 if (!same_sta) 488 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 489 490 return 0; 491 } 492 493 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 494 unsigned long tfd_queue_mask, u8 ac) 495 { 496 int queue = 0; 497 u8 ac_to_queue[IEEE80211_NUM_ACS]; 498 int i; 499 500 lockdep_assert_held(&mvm->queue_info_lock); 501 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 502 return -EINVAL; 503 504 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 505 506 /* See what ACs the existing queues for this STA have */ 507 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 508 /* Only DATA queues can be shared */ 509 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 510 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 511 continue; 512 513 /* Don't try and take queues being reconfigured */ 514 if (mvm->queue_info[queue].status == 515 IWL_MVM_QUEUE_RECONFIGURING) 516 continue; 517 518 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 519 } 520 521 /* 522 * The queue to share is chosen only from DATA queues as follows (in 523 * descending priority): 524 * 1. An AC_BE queue 525 * 2. Same AC queue 526 * 3. Highest AC queue that is lower than new AC 527 * 4. Any existing AC (there always is at least 1 DATA queue) 528 */ 529 530 /* Priority 1: An AC_BE queue */ 531 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 532 queue = ac_to_queue[IEEE80211_AC_BE]; 533 /* Priority 2: Same AC queue */ 534 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 535 queue = ac_to_queue[ac]; 536 /* Priority 3a: If new AC is VO and VI exists - use VI */ 537 else if (ac == IEEE80211_AC_VO && 538 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 539 queue = ac_to_queue[IEEE80211_AC_VI]; 540 /* Priority 3b: No BE so only AC less than the new one is BK */ 541 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 542 queue = ac_to_queue[IEEE80211_AC_BK]; 543 /* Priority 4a: No BE nor BK - use VI if exists */ 544 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 545 queue = ac_to_queue[IEEE80211_AC_VI]; 546 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 547 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 548 queue = ac_to_queue[IEEE80211_AC_VO]; 549 550 /* Make sure queue found (or not) is legal */ 551 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 552 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 553 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 554 IWL_ERR(mvm, "No DATA queues available to share\n"); 555 return -ENOSPC; 556 } 557 558 /* Make sure the queue isn't in the middle of being reconfigured */ 559 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 560 IWL_ERR(mvm, 561 "TXQ %d is in the middle of re-config - try again\n", 562 queue); 563 return -EBUSY; 564 } 565 566 return queue; 567 } 568 569 /* 570 * If a given queue has a higher AC than the TID stream that is being compared 571 * to, the queue needs to be redirected to the lower AC. This function does that 572 * in such a case, otherwise - if no redirection required - it does nothing, 573 * unless the %force param is true. 574 */ 575 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 576 int ac, int ssn, unsigned int wdg_timeout, 577 bool force) 578 { 579 struct iwl_scd_txq_cfg_cmd cmd = { 580 .scd_queue = queue, 581 .action = SCD_CFG_DISABLE_QUEUE, 582 }; 583 bool shared_queue; 584 unsigned long mq; 585 int ret; 586 587 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 588 return -EINVAL; 589 590 /* 591 * If the AC is lower than current one - FIFO needs to be redirected to 592 * the lowest one of the streams in the queue. Check if this is needed 593 * here. 594 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 595 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 596 * we need to check if the numerical value of X is LARGER than of Y. 597 */ 598 spin_lock_bh(&mvm->queue_info_lock); 599 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 600 spin_unlock_bh(&mvm->queue_info_lock); 601 602 IWL_DEBUG_TX_QUEUES(mvm, 603 "No redirection needed on TXQ #%d\n", 604 queue); 605 return 0; 606 } 607 608 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 609 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 610 cmd.tid = mvm->queue_info[queue].txq_tid; 611 mq = mvm->hw_queue_to_mac80211[queue]; 612 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 613 spin_unlock_bh(&mvm->queue_info_lock); 614 615 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 616 queue, iwl_mvm_ac_to_tx_fifo[ac]); 617 618 /* Stop MAC queues and wait for this queue to empty */ 619 iwl_mvm_stop_mac_queues(mvm, mq); 620 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 621 if (ret) { 622 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 623 queue); 624 ret = -EIO; 625 goto out; 626 } 627 628 /* Before redirecting the queue we need to de-activate it */ 629 iwl_trans_txq_disable(mvm->trans, queue, false); 630 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 631 if (ret) 632 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 633 ret); 634 635 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 636 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 637 638 /* Update the TID "owner" of the queue */ 639 spin_lock_bh(&mvm->queue_info_lock); 640 mvm->queue_info[queue].txq_tid = tid; 641 spin_unlock_bh(&mvm->queue_info_lock); 642 643 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 644 645 /* Redirect to lower AC */ 646 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 647 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, 648 ssn); 649 650 /* Update AC marking of the queue */ 651 spin_lock_bh(&mvm->queue_info_lock); 652 mvm->queue_info[queue].mac80211_ac = ac; 653 spin_unlock_bh(&mvm->queue_info_lock); 654 655 /* 656 * Mark queue as shared in transport if shared 657 * Note this has to be done after queue enablement because enablement 658 * can also set this value, and there is no indication there to shared 659 * queues 660 */ 661 if (shared_queue) 662 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 663 664 out: 665 /* Continue using the MAC queues */ 666 iwl_mvm_start_mac_queues(mvm, mq); 667 668 return ret; 669 } 670 671 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 672 struct ieee80211_sta *sta, u8 ac, 673 int tid) 674 { 675 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 676 unsigned int wdg_timeout = 677 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 678 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 679 int queue = -1; 680 681 lockdep_assert_held(&mvm->mutex); 682 683 IWL_DEBUG_TX_QUEUES(mvm, 684 "Allocating queue for sta %d on tid %d\n", 685 mvmsta->sta_id, tid); 686 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid, 687 wdg_timeout); 688 if (queue < 0) 689 return queue; 690 691 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 692 693 spin_lock_bh(&mvmsta->lock); 694 mvmsta->tid_data[tid].txq_id = queue; 695 mvmsta->tid_data[tid].is_tid_active = true; 696 spin_unlock_bh(&mvmsta->lock); 697 698 return 0; 699 } 700 701 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 702 struct ieee80211_sta *sta, u8 ac, int tid, 703 struct ieee80211_hdr *hdr) 704 { 705 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 706 struct iwl_trans_txq_scd_cfg cfg = { 707 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac), 708 .sta_id = mvmsta->sta_id, 709 .tid = tid, 710 .frame_limit = IWL_FRAME_LIMIT, 711 }; 712 unsigned int wdg_timeout = 713 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 714 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 715 int queue = -1; 716 bool using_inactive_queue = false, same_sta = false; 717 unsigned long disable_agg_tids = 0; 718 enum iwl_mvm_agg_state queue_state; 719 bool shared_queue = false, inc_ssn; 720 int ssn; 721 unsigned long tfd_queue_mask; 722 int ret; 723 724 lockdep_assert_held(&mvm->mutex); 725 726 if (iwl_mvm_has_new_tx_api(mvm)) 727 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 728 729 spin_lock_bh(&mvmsta->lock); 730 tfd_queue_mask = mvmsta->tfd_queue_msk; 731 spin_unlock_bh(&mvmsta->lock); 732 733 spin_lock_bh(&mvm->queue_info_lock); 734 735 /* 736 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 737 * exists 738 */ 739 if (!ieee80211_is_data_qos(hdr->frame_control) || 740 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 741 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 742 IWL_MVM_DQA_MIN_MGMT_QUEUE, 743 IWL_MVM_DQA_MAX_MGMT_QUEUE); 744 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 745 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 746 queue); 747 748 /* If no such queue is found, we'll use a DATA queue instead */ 749 } 750 751 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 752 (mvm->queue_info[mvmsta->reserved_queue].status == 753 IWL_MVM_QUEUE_RESERVED || 754 mvm->queue_info[mvmsta->reserved_queue].status == 755 IWL_MVM_QUEUE_INACTIVE)) { 756 queue = mvmsta->reserved_queue; 757 mvm->queue_info[queue].reserved = true; 758 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 759 } 760 761 if (queue < 0) 762 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 763 IWL_MVM_DQA_MIN_DATA_QUEUE, 764 IWL_MVM_DQA_MAX_DATA_QUEUE); 765 766 /* 767 * Check if this queue is already allocated but inactive. 768 * In such a case, we'll need to first free this queue before enabling 769 * it again, so we'll mark it as reserved to make sure no new traffic 770 * arrives on it 771 */ 772 if (queue > 0 && 773 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 774 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 775 using_inactive_queue = true; 776 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 777 IWL_DEBUG_TX_QUEUES(mvm, 778 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 779 queue, mvmsta->sta_id, tid); 780 } 781 782 /* No free queue - we'll have to share */ 783 if (queue <= 0) { 784 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 785 if (queue > 0) { 786 shared_queue = true; 787 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 788 } 789 } 790 791 /* 792 * Mark TXQ as ready, even though it hasn't been fully configured yet, 793 * to make sure no one else takes it. 794 * This will allow avoiding re-acquiring the lock at the end of the 795 * configuration. On error we'll mark it back as free. 796 */ 797 if ((queue > 0) && !shared_queue) 798 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 799 800 spin_unlock_bh(&mvm->queue_info_lock); 801 802 /* This shouldn't happen - out of queues */ 803 if (WARN_ON(queue <= 0)) { 804 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 805 tid, cfg.sta_id); 806 return queue; 807 } 808 809 /* 810 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 811 * but for configuring the SCD to send A-MPDUs we need to mark the queue 812 * as aggregatable. 813 * Mark all DATA queues as allowing to be aggregated at some point 814 */ 815 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 816 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 817 818 /* 819 * If this queue was previously inactive (idle) - we need to free it 820 * first 821 */ 822 if (using_inactive_queue) { 823 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 824 if (ret) 825 return ret; 826 } 827 828 IWL_DEBUG_TX_QUEUES(mvm, 829 "Allocating %squeue #%d to sta %d on tid %d\n", 830 shared_queue ? "shared " : "", queue, 831 mvmsta->sta_id, tid); 832 833 if (shared_queue) { 834 /* Disable any open aggs on this queue */ 835 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 836 837 if (disable_agg_tids) { 838 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 839 queue); 840 iwl_mvm_invalidate_sta_queue(mvm, queue, 841 disable_agg_tids, false); 842 } 843 } 844 845 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 846 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue, 847 ssn, &cfg, wdg_timeout); 848 if (inc_ssn) { 849 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 850 le16_add_cpu(&hdr->seq_ctrl, 0x10); 851 } 852 853 /* 854 * Mark queue as shared in transport if shared 855 * Note this has to be done after queue enablement because enablement 856 * can also set this value, and there is no indication there to shared 857 * queues 858 */ 859 if (shared_queue) 860 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 861 862 spin_lock_bh(&mvmsta->lock); 863 /* 864 * This looks racy, but it is not. We have only one packet for 865 * this ra/tid in our Tx path since we stop the Qdisc when we 866 * need to allocate a new TFD queue. 867 */ 868 if (inc_ssn) 869 mvmsta->tid_data[tid].seq_number += 0x10; 870 mvmsta->tid_data[tid].txq_id = queue; 871 mvmsta->tid_data[tid].is_tid_active = true; 872 mvmsta->tfd_queue_msk |= BIT(queue); 873 queue_state = mvmsta->tid_data[tid].state; 874 875 if (mvmsta->reserved_queue == queue) 876 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 877 spin_unlock_bh(&mvmsta->lock); 878 879 if (!shared_queue) { 880 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 881 if (ret) 882 goto out_err; 883 884 /* If we need to re-enable aggregations... */ 885 if (queue_state == IWL_AGG_ON) { 886 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 887 if (ret) 888 goto out_err; 889 } 890 } else { 891 /* Redirect queue, if needed */ 892 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 893 wdg_timeout, false); 894 if (ret) 895 goto out_err; 896 } 897 898 return 0; 899 900 out_err: 901 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 902 903 return ret; 904 } 905 906 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 907 { 908 struct iwl_scd_txq_cfg_cmd cmd = { 909 .scd_queue = queue, 910 .action = SCD_CFG_UPDATE_QUEUE_TID, 911 }; 912 int tid; 913 unsigned long tid_bitmap; 914 int ret; 915 916 lockdep_assert_held(&mvm->mutex); 917 918 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 919 return; 920 921 spin_lock_bh(&mvm->queue_info_lock); 922 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 923 spin_unlock_bh(&mvm->queue_info_lock); 924 925 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 926 return; 927 928 /* Find any TID for queue */ 929 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 930 cmd.tid = tid; 931 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 932 933 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 934 if (ret) { 935 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 936 queue, ret); 937 return; 938 } 939 940 spin_lock_bh(&mvm->queue_info_lock); 941 mvm->queue_info[queue].txq_tid = tid; 942 spin_unlock_bh(&mvm->queue_info_lock); 943 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 944 queue, tid); 945 } 946 947 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 948 { 949 struct ieee80211_sta *sta; 950 struct iwl_mvm_sta *mvmsta; 951 u8 sta_id; 952 int tid = -1; 953 unsigned long tid_bitmap; 954 unsigned int wdg_timeout; 955 int ssn; 956 int ret = true; 957 958 /* queue sharing is disabled on new TX path */ 959 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 960 return; 961 962 lockdep_assert_held(&mvm->mutex); 963 964 spin_lock_bh(&mvm->queue_info_lock); 965 sta_id = mvm->queue_info[queue].ra_sta_id; 966 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 967 spin_unlock_bh(&mvm->queue_info_lock); 968 969 /* Find TID for queue, and make sure it is the only one on the queue */ 970 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 971 if (tid_bitmap != BIT(tid)) { 972 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 973 queue, tid_bitmap); 974 return; 975 } 976 977 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 978 tid); 979 980 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 981 lockdep_is_held(&mvm->mutex)); 982 983 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 984 return; 985 986 mvmsta = iwl_mvm_sta_from_mac80211(sta); 987 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 988 989 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 990 991 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 992 tid_to_mac80211_ac[tid], ssn, 993 wdg_timeout, true); 994 if (ret) { 995 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 996 return; 997 } 998 999 /* If aggs should be turned back on - do it */ 1000 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1001 struct iwl_mvm_add_sta_cmd cmd = {0}; 1002 1003 mvmsta->tid_disable_agg &= ~BIT(tid); 1004 1005 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1006 cmd.sta_id = mvmsta->sta_id; 1007 cmd.add_modify = STA_MODE_MODIFY; 1008 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1009 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1010 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1011 1012 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1013 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1014 if (!ret) { 1015 IWL_DEBUG_TX_QUEUES(mvm, 1016 "TXQ #%d is now aggregated again\n", 1017 queue); 1018 1019 /* Mark queue intenally as aggregating again */ 1020 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1021 } 1022 } 1023 1024 spin_lock_bh(&mvm->queue_info_lock); 1025 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1026 spin_unlock_bh(&mvm->queue_info_lock); 1027 } 1028 1029 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1030 { 1031 if (tid == IWL_MAX_TID_COUNT) 1032 return IEEE80211_AC_VO; /* MGMT */ 1033 1034 return tid_to_mac80211_ac[tid]; 1035 } 1036 1037 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 1038 struct ieee80211_sta *sta, int tid) 1039 { 1040 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1041 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1042 struct sk_buff *skb; 1043 struct ieee80211_hdr *hdr; 1044 struct sk_buff_head deferred_tx; 1045 u8 mac_queue; 1046 bool no_queue = false; /* Marks if there is a problem with the queue */ 1047 u8 ac; 1048 1049 lockdep_assert_held(&mvm->mutex); 1050 1051 skb = skb_peek(&tid_data->deferred_tx_frames); 1052 if (!skb) 1053 return; 1054 hdr = (void *)skb->data; 1055 1056 ac = iwl_mvm_tid_to_ac_queue(tid); 1057 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1058 1059 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE && 1060 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1061 IWL_ERR(mvm, 1062 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1063 mvmsta->sta_id, tid); 1064 1065 /* 1066 * Mark queue as problematic so later the deferred traffic is 1067 * freed, as we can do nothing with it 1068 */ 1069 no_queue = true; 1070 } 1071 1072 __skb_queue_head_init(&deferred_tx); 1073 1074 /* Disable bottom-halves when entering TX path */ 1075 local_bh_disable(); 1076 spin_lock(&mvmsta->lock); 1077 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1078 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1079 spin_unlock(&mvmsta->lock); 1080 1081 while ((skb = __skb_dequeue(&deferred_tx))) 1082 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1083 ieee80211_free_txskb(mvm->hw, skb); 1084 local_bh_enable(); 1085 1086 /* Wake queue */ 1087 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1088 } 1089 1090 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1091 { 1092 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1093 add_stream_wk); 1094 struct ieee80211_sta *sta; 1095 struct iwl_mvm_sta *mvmsta; 1096 unsigned long deferred_tid_traffic; 1097 int queue, sta_id, tid; 1098 1099 /* Check inactivity of queues */ 1100 iwl_mvm_inactivity_check(mvm); 1101 1102 mutex_lock(&mvm->mutex); 1103 1104 /* No queue reconfiguration in TVQM mode */ 1105 if (iwl_mvm_has_new_tx_api(mvm)) 1106 goto alloc_queues; 1107 1108 /* Reconfigure queues requiring reconfiguation */ 1109 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) { 1110 bool reconfig; 1111 bool change_owner; 1112 1113 spin_lock_bh(&mvm->queue_info_lock); 1114 reconfig = (mvm->queue_info[queue].status == 1115 IWL_MVM_QUEUE_RECONFIGURING); 1116 1117 /* 1118 * We need to take into account a situation in which a TXQ was 1119 * allocated to TID x, and then turned shared by adding TIDs y 1120 * and z. If TID x becomes inactive and is removed from the TXQ, 1121 * ownership must be given to one of the remaining TIDs. 1122 * This is mainly because if TID x continues - a new queue can't 1123 * be allocated for it as long as it is an owner of another TXQ. 1124 */ 1125 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1126 BIT(mvm->queue_info[queue].txq_tid)) && 1127 (mvm->queue_info[queue].status == 1128 IWL_MVM_QUEUE_SHARED); 1129 spin_unlock_bh(&mvm->queue_info_lock); 1130 1131 if (reconfig) 1132 iwl_mvm_unshare_queue(mvm, queue); 1133 else if (change_owner) 1134 iwl_mvm_change_queue_owner(mvm, queue); 1135 } 1136 1137 alloc_queues: 1138 /* Go over all stations with deferred traffic */ 1139 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1140 IWL_MVM_STATION_COUNT) { 1141 clear_bit(sta_id, mvm->sta_deferred_frames); 1142 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1143 lockdep_is_held(&mvm->mutex)); 1144 if (IS_ERR_OR_NULL(sta)) 1145 continue; 1146 1147 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1148 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1149 1150 for_each_set_bit(tid, &deferred_tid_traffic, 1151 IWL_MAX_TID_COUNT + 1) 1152 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1153 } 1154 1155 mutex_unlock(&mvm->mutex); 1156 } 1157 1158 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1159 struct ieee80211_sta *sta, 1160 enum nl80211_iftype vif_type) 1161 { 1162 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1163 int queue; 1164 bool using_inactive_queue = false, same_sta = false; 1165 1166 /* queue reserving is disabled on new TX path */ 1167 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1168 return 0; 1169 1170 /* 1171 * Check for inactive queues, so we don't reach a situation where we 1172 * can't add a STA due to a shortage in queues that doesn't really exist 1173 */ 1174 iwl_mvm_inactivity_check(mvm); 1175 1176 spin_lock_bh(&mvm->queue_info_lock); 1177 1178 /* Make sure we have free resources for this STA */ 1179 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1180 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1181 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1182 IWL_MVM_QUEUE_FREE)) 1183 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1184 else 1185 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1186 IWL_MVM_DQA_MIN_DATA_QUEUE, 1187 IWL_MVM_DQA_MAX_DATA_QUEUE); 1188 if (queue < 0) { 1189 spin_unlock_bh(&mvm->queue_info_lock); 1190 IWL_ERR(mvm, "No available queues for new station\n"); 1191 return -ENOSPC; 1192 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 1193 /* 1194 * If this queue is already allocated but inactive we'll need to 1195 * first free this queue before enabling it again, we'll mark 1196 * it as reserved to make sure no new traffic arrives on it 1197 */ 1198 using_inactive_queue = true; 1199 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 1200 } 1201 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1202 1203 spin_unlock_bh(&mvm->queue_info_lock); 1204 1205 mvmsta->reserved_queue = queue; 1206 1207 if (using_inactive_queue) 1208 iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 1209 1210 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1211 queue, mvmsta->sta_id); 1212 1213 return 0; 1214 } 1215 1216 /* 1217 * In DQA mode, after a HW restart the queues should be allocated as before, in 1218 * order to avoid race conditions when there are shared queues. This function 1219 * does the re-mapping and queue allocation. 1220 * 1221 * Note that re-enabling aggregations isn't done in this function. 1222 */ 1223 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1224 struct iwl_mvm_sta *mvm_sta) 1225 { 1226 unsigned int wdg_timeout = 1227 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1228 int i; 1229 struct iwl_trans_txq_scd_cfg cfg = { 1230 .sta_id = mvm_sta->sta_id, 1231 .frame_limit = IWL_FRAME_LIMIT, 1232 }; 1233 1234 /* Make sure reserved queue is still marked as such (if allocated) */ 1235 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1236 mvm->queue_info[mvm_sta->reserved_queue].status = 1237 IWL_MVM_QUEUE_RESERVED; 1238 1239 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1240 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1241 int txq_id = tid_data->txq_id; 1242 int ac; 1243 u8 mac_queue; 1244 1245 if (txq_id == IWL_MVM_INVALID_QUEUE) 1246 continue; 1247 1248 skb_queue_head_init(&tid_data->deferred_tx_frames); 1249 1250 ac = tid_to_mac80211_ac[i]; 1251 mac_queue = mvm_sta->vif->hw_queue[ac]; 1252 1253 if (iwl_mvm_has_new_tx_api(mvm)) { 1254 IWL_DEBUG_TX_QUEUES(mvm, 1255 "Re-mapping sta %d tid %d\n", 1256 mvm_sta->sta_id, i); 1257 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, 1258 mvm_sta->sta_id, 1259 i, wdg_timeout); 1260 tid_data->txq_id = txq_id; 1261 } else { 1262 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1263 1264 cfg.tid = i; 1265 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 1266 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1267 txq_id == 1268 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1269 1270 IWL_DEBUG_TX_QUEUES(mvm, 1271 "Re-mapping sta %d tid %d to queue %d\n", 1272 mvm_sta->sta_id, i, txq_id); 1273 1274 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg, 1275 wdg_timeout); 1276 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1277 } 1278 } 1279 } 1280 1281 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1282 struct iwl_mvm_int_sta *sta, 1283 const u8 *addr, 1284 u16 mac_id, u16 color) 1285 { 1286 struct iwl_mvm_add_sta_cmd cmd; 1287 int ret; 1288 u32 status; 1289 1290 lockdep_assert_held(&mvm->mutex); 1291 1292 memset(&cmd, 0, sizeof(cmd)); 1293 cmd.sta_id = sta->sta_id; 1294 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1295 color)); 1296 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1297 cmd.station_type = sta->type; 1298 1299 if (!iwl_mvm_has_new_tx_api(mvm)) 1300 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1301 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1302 1303 if (addr) 1304 memcpy(cmd.addr, addr, ETH_ALEN); 1305 1306 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1307 iwl_mvm_add_sta_cmd_size(mvm), 1308 &cmd, &status); 1309 if (ret) 1310 return ret; 1311 1312 switch (status & IWL_ADD_STA_STATUS_MASK) { 1313 case ADD_STA_SUCCESS: 1314 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1315 return 0; 1316 default: 1317 ret = -EIO; 1318 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1319 status); 1320 break; 1321 } 1322 return ret; 1323 } 1324 1325 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1326 struct ieee80211_vif *vif, 1327 struct ieee80211_sta *sta) 1328 { 1329 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1330 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1331 struct iwl_mvm_rxq_dup_data *dup_data; 1332 int i, ret, sta_id; 1333 bool sta_update = false; 1334 unsigned int sta_flags = 0; 1335 1336 lockdep_assert_held(&mvm->mutex); 1337 1338 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1339 sta_id = iwl_mvm_find_free_sta_id(mvm, 1340 ieee80211_vif_type_p2p(vif)); 1341 else 1342 sta_id = mvm_sta->sta_id; 1343 1344 if (sta_id == IWL_MVM_INVALID_STA) 1345 return -ENOSPC; 1346 1347 spin_lock_init(&mvm_sta->lock); 1348 1349 /* if this is a HW restart re-alloc existing queues */ 1350 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1351 struct iwl_mvm_int_sta tmp_sta = { 1352 .sta_id = sta_id, 1353 .type = mvm_sta->sta_type, 1354 }; 1355 1356 /* 1357 * First add an empty station since allocating 1358 * a queue requires a valid station 1359 */ 1360 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr, 1361 mvmvif->id, mvmvif->color); 1362 if (ret) 1363 goto err; 1364 1365 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1366 sta_update = true; 1367 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES; 1368 goto update_fw; 1369 } 1370 1371 mvm_sta->sta_id = sta_id; 1372 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1373 mvmvif->color); 1374 mvm_sta->vif = vif; 1375 if (!mvm->trans->cfg->gen2) 1376 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1377 else 1378 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1379 mvm_sta->tx_protection = 0; 1380 mvm_sta->tt_tx_protection = false; 1381 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1382 1383 /* HW restart, don't assume the memory has been zeroed */ 1384 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1385 mvm_sta->tfd_queue_msk = 0; 1386 1387 /* for HW restart - reset everything but the sequence number */ 1388 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1389 u16 seq = mvm_sta->tid_data[i].seq_number; 1390 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1391 mvm_sta->tid_data[i].seq_number = seq; 1392 1393 /* 1394 * Mark all queues for this STA as unallocated and defer TX 1395 * frames until the queue is allocated 1396 */ 1397 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1398 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1399 } 1400 mvm_sta->deferred_traffic_tid_map = 0; 1401 mvm_sta->agg_tids = 0; 1402 1403 if (iwl_mvm_has_new_rx_api(mvm) && 1404 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1405 int q; 1406 1407 dup_data = kcalloc(mvm->trans->num_rx_queues, 1408 sizeof(*dup_data), GFP_KERNEL); 1409 if (!dup_data) 1410 return -ENOMEM; 1411 /* 1412 * Initialize all the last_seq values to 0xffff which can never 1413 * compare equal to the frame's seq_ctrl in the check in 1414 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1415 * number and fragmented packets don't reach that function. 1416 * 1417 * This thus allows receiving a packet with seqno 0 and the 1418 * retry bit set as the very first packet on a new TID. 1419 */ 1420 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1421 memset(dup_data[q].last_seq, 0xff, 1422 sizeof(dup_data[q].last_seq)); 1423 mvm_sta->dup_data = dup_data; 1424 } 1425 1426 if (!iwl_mvm_has_new_tx_api(mvm)) { 1427 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1428 ieee80211_vif_type_p2p(vif)); 1429 if (ret) 1430 goto err; 1431 } 1432 1433 update_fw: 1434 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags); 1435 if (ret) 1436 goto err; 1437 1438 if (vif->type == NL80211_IFTYPE_STATION) { 1439 if (!sta->tdls) { 1440 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1441 mvmvif->ap_sta_id = sta_id; 1442 } else { 1443 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1444 } 1445 } 1446 1447 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1448 1449 return 0; 1450 1451 err: 1452 return ret; 1453 } 1454 1455 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1456 bool drain) 1457 { 1458 struct iwl_mvm_add_sta_cmd cmd = {}; 1459 int ret; 1460 u32 status; 1461 1462 lockdep_assert_held(&mvm->mutex); 1463 1464 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1465 cmd.sta_id = mvmsta->sta_id; 1466 cmd.add_modify = STA_MODE_MODIFY; 1467 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1468 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1469 1470 status = ADD_STA_SUCCESS; 1471 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1472 iwl_mvm_add_sta_cmd_size(mvm), 1473 &cmd, &status); 1474 if (ret) 1475 return ret; 1476 1477 switch (status & IWL_ADD_STA_STATUS_MASK) { 1478 case ADD_STA_SUCCESS: 1479 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1480 mvmsta->sta_id); 1481 break; 1482 default: 1483 ret = -EIO; 1484 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1485 mvmsta->sta_id); 1486 break; 1487 } 1488 1489 return ret; 1490 } 1491 1492 /* 1493 * Remove a station from the FW table. Before sending the command to remove 1494 * the station validate that the station is indeed known to the driver (sanity 1495 * only). 1496 */ 1497 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1498 { 1499 struct ieee80211_sta *sta; 1500 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1501 .sta_id = sta_id, 1502 }; 1503 int ret; 1504 1505 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1506 lockdep_is_held(&mvm->mutex)); 1507 1508 /* Note: internal stations are marked as error values */ 1509 if (!sta) { 1510 IWL_ERR(mvm, "Invalid station id\n"); 1511 return -EINVAL; 1512 } 1513 1514 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1515 sizeof(rm_sta_cmd), &rm_sta_cmd); 1516 if (ret) { 1517 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1518 return ret; 1519 } 1520 1521 return 0; 1522 } 1523 1524 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1525 struct ieee80211_vif *vif, 1526 struct iwl_mvm_sta *mvm_sta) 1527 { 1528 int ac; 1529 int i; 1530 1531 lockdep_assert_held(&mvm->mutex); 1532 1533 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1534 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1535 continue; 1536 1537 ac = iwl_mvm_tid_to_ac_queue(i); 1538 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1539 vif->hw_queue[ac], i, 0); 1540 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1541 } 1542 } 1543 1544 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1545 struct iwl_mvm_sta *mvm_sta) 1546 { 1547 int i; 1548 1549 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1550 u16 txq_id; 1551 int ret; 1552 1553 spin_lock_bh(&mvm_sta->lock); 1554 txq_id = mvm_sta->tid_data[i].txq_id; 1555 spin_unlock_bh(&mvm_sta->lock); 1556 1557 if (txq_id == IWL_MVM_INVALID_QUEUE) 1558 continue; 1559 1560 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1561 if (ret) 1562 return ret; 1563 } 1564 1565 return 0; 1566 } 1567 1568 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1569 struct ieee80211_vif *vif, 1570 struct ieee80211_sta *sta) 1571 { 1572 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1573 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1574 u8 sta_id = mvm_sta->sta_id; 1575 int ret; 1576 1577 lockdep_assert_held(&mvm->mutex); 1578 1579 if (iwl_mvm_has_new_rx_api(mvm)) 1580 kfree(mvm_sta->dup_data); 1581 1582 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1583 if (ret) 1584 return ret; 1585 1586 /* flush its queues here since we are freeing mvm_sta */ 1587 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1588 if (ret) 1589 return ret; 1590 if (iwl_mvm_has_new_tx_api(mvm)) { 1591 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1592 } else { 1593 u32 q_mask = mvm_sta->tfd_queue_msk; 1594 1595 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1596 q_mask); 1597 } 1598 if (ret) 1599 return ret; 1600 1601 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1602 1603 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1604 1605 /* If there is a TXQ still marked as reserved - free it */ 1606 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1607 u8 reserved_txq = mvm_sta->reserved_queue; 1608 enum iwl_mvm_queue_status *status; 1609 1610 /* 1611 * If no traffic has gone through the reserved TXQ - it 1612 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1613 * should be manually marked as free again 1614 */ 1615 spin_lock_bh(&mvm->queue_info_lock); 1616 status = &mvm->queue_info[reserved_txq].status; 1617 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1618 (*status != IWL_MVM_QUEUE_FREE), 1619 "sta_id %d reserved txq %d status %d", 1620 sta_id, reserved_txq, *status)) { 1621 spin_unlock_bh(&mvm->queue_info_lock); 1622 return -EINVAL; 1623 } 1624 1625 *status = IWL_MVM_QUEUE_FREE; 1626 spin_unlock_bh(&mvm->queue_info_lock); 1627 } 1628 1629 if (vif->type == NL80211_IFTYPE_STATION && 1630 mvmvif->ap_sta_id == sta_id) { 1631 /* if associated - we can't remove the AP STA now */ 1632 if (vif->bss_conf.assoc) 1633 return ret; 1634 1635 /* unassoc - go ahead - remove the AP STA now */ 1636 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1637 1638 /* clear d0i3_ap_sta_id if no longer relevant */ 1639 if (mvm->d0i3_ap_sta_id == sta_id) 1640 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1641 } 1642 1643 /* 1644 * This shouldn't happen - the TDLS channel switch should be canceled 1645 * before the STA is removed. 1646 */ 1647 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1648 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1649 cancel_delayed_work(&mvm->tdls_cs.dwork); 1650 } 1651 1652 /* 1653 * Make sure that the tx response code sees the station as -EBUSY and 1654 * calls the drain worker. 1655 */ 1656 spin_lock_bh(&mvm_sta->lock); 1657 spin_unlock_bh(&mvm_sta->lock); 1658 1659 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1660 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1661 1662 return ret; 1663 } 1664 1665 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1666 struct ieee80211_vif *vif, 1667 u8 sta_id) 1668 { 1669 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1670 1671 lockdep_assert_held(&mvm->mutex); 1672 1673 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1674 return ret; 1675 } 1676 1677 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1678 struct iwl_mvm_int_sta *sta, 1679 u32 qmask, enum nl80211_iftype iftype, 1680 enum iwl_sta_type type) 1681 { 1682 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1683 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1684 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1685 return -ENOSPC; 1686 } 1687 1688 sta->tfd_queue_msk = qmask; 1689 sta->type = type; 1690 1691 /* put a non-NULL value so iterating over the stations won't stop */ 1692 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1693 return 0; 1694 } 1695 1696 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1697 { 1698 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1699 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1700 sta->sta_id = IWL_MVM_INVALID_STA; 1701 } 1702 1703 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm) 1704 { 1705 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1706 mvm->cfg->base_params->wd_timeout : 1707 IWL_WATCHDOG_DISABLED; 1708 1709 if (iwl_mvm_has_new_tx_api(mvm)) { 1710 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue, 1711 mvm->aux_sta.sta_id, 1712 IWL_MAX_TID_COUNT, 1713 wdg_timeout); 1714 mvm->aux_queue = queue; 1715 } else { 1716 struct iwl_trans_txq_scd_cfg cfg = { 1717 .fifo = IWL_MVM_TX_FIFO_MCAST, 1718 .sta_id = mvm->aux_sta.sta_id, 1719 .tid = IWL_MAX_TID_COUNT, 1720 .aggregate = false, 1721 .frame_limit = IWL_FRAME_LIMIT, 1722 }; 1723 1724 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg, 1725 wdg_timeout); 1726 } 1727 } 1728 1729 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1730 { 1731 int ret; 1732 1733 lockdep_assert_held(&mvm->mutex); 1734 1735 /* Allocate aux station and assign to it the aux queue */ 1736 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1737 NL80211_IFTYPE_UNSPECIFIED, 1738 IWL_STA_AUX_ACTIVITY); 1739 if (ret) 1740 return ret; 1741 1742 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1743 if (!iwl_mvm_has_new_tx_api(mvm)) 1744 iwl_mvm_enable_aux_queue(mvm); 1745 1746 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1747 MAC_INDEX_AUX, 0); 1748 if (ret) { 1749 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1750 return ret; 1751 } 1752 1753 /* 1754 * For a000 firmware and on we cannot add queue to a station unknown 1755 * to firmware so enable queue here - after the station was added 1756 */ 1757 if (iwl_mvm_has_new_tx_api(mvm)) 1758 iwl_mvm_enable_aux_queue(mvm); 1759 1760 return 0; 1761 } 1762 1763 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1764 { 1765 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1766 1767 lockdep_assert_held(&mvm->mutex); 1768 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1769 mvmvif->id, 0); 1770 } 1771 1772 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1773 { 1774 int ret; 1775 1776 lockdep_assert_held(&mvm->mutex); 1777 1778 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1779 if (ret) 1780 IWL_WARN(mvm, "Failed sending remove station\n"); 1781 1782 return ret; 1783 } 1784 1785 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1786 { 1787 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1788 } 1789 1790 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1791 { 1792 lockdep_assert_held(&mvm->mutex); 1793 1794 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1795 } 1796 1797 /* 1798 * Send the add station command for the vif's broadcast station. 1799 * Assumes that the station was already allocated. 1800 * 1801 * @mvm: the mvm component 1802 * @vif: the interface to which the broadcast station is added 1803 * @bsta: the broadcast station to add. 1804 */ 1805 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1806 { 1807 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1808 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1809 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1810 const u8 *baddr = _baddr; 1811 int queue; 1812 int ret; 1813 unsigned int wdg_timeout = 1814 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1815 struct iwl_trans_txq_scd_cfg cfg = { 1816 .fifo = IWL_MVM_TX_FIFO_VO, 1817 .sta_id = mvmvif->bcast_sta.sta_id, 1818 .tid = IWL_MAX_TID_COUNT, 1819 .aggregate = false, 1820 .frame_limit = IWL_FRAME_LIMIT, 1821 }; 1822 1823 lockdep_assert_held(&mvm->mutex); 1824 1825 if (!iwl_mvm_has_new_tx_api(mvm)) { 1826 if (vif->type == NL80211_IFTYPE_AP || 1827 vif->type == NL80211_IFTYPE_ADHOC) 1828 queue = mvm->probe_queue; 1829 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1830 queue = mvm->p2p_dev_queue; 1831 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 1832 return -EINVAL; 1833 1834 bsta->tfd_queue_msk |= BIT(queue); 1835 1836 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, 1837 &cfg, wdg_timeout); 1838 } 1839 1840 if (vif->type == NL80211_IFTYPE_ADHOC) 1841 baddr = vif->bss_conf.bssid; 1842 1843 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 1844 return -ENOSPC; 1845 1846 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 1847 mvmvif->id, mvmvif->color); 1848 if (ret) 1849 return ret; 1850 1851 /* 1852 * For a000 firmware and on we cannot add queue to a station unknown 1853 * to firmware so enable queue here - after the station was added 1854 */ 1855 if (iwl_mvm_has_new_tx_api(mvm)) { 1856 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0], 1857 bsta->sta_id, 1858 IWL_MAX_TID_COUNT, 1859 wdg_timeout); 1860 1861 if (vif->type == NL80211_IFTYPE_AP || 1862 vif->type == NL80211_IFTYPE_ADHOC) 1863 mvm->probe_queue = queue; 1864 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 1865 mvm->p2p_dev_queue = queue; 1866 } 1867 1868 return 0; 1869 } 1870 1871 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 1872 struct ieee80211_vif *vif) 1873 { 1874 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1875 int queue; 1876 1877 lockdep_assert_held(&mvm->mutex); 1878 1879 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 1880 1881 switch (vif->type) { 1882 case NL80211_IFTYPE_AP: 1883 case NL80211_IFTYPE_ADHOC: 1884 queue = mvm->probe_queue; 1885 break; 1886 case NL80211_IFTYPE_P2P_DEVICE: 1887 queue = mvm->p2p_dev_queue; 1888 break; 1889 default: 1890 WARN(1, "Can't free bcast queue on vif type %d\n", 1891 vif->type); 1892 return; 1893 } 1894 1895 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0); 1896 if (iwl_mvm_has_new_tx_api(mvm)) 1897 return; 1898 1899 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 1900 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 1901 } 1902 1903 /* Send the FW a request to remove the station from it's internal data 1904 * structures, but DO NOT remove the entry from the local data structures. */ 1905 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1906 { 1907 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1908 int ret; 1909 1910 lockdep_assert_held(&mvm->mutex); 1911 1912 iwl_mvm_free_bcast_sta_queues(mvm, vif); 1913 1914 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 1915 if (ret) 1916 IWL_WARN(mvm, "Failed sending remove station\n"); 1917 return ret; 1918 } 1919 1920 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1921 { 1922 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1923 1924 lockdep_assert_held(&mvm->mutex); 1925 1926 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0, 1927 ieee80211_vif_type_p2p(vif), 1928 IWL_STA_GENERAL_PURPOSE); 1929 } 1930 1931 /* Allocate a new station entry for the broadcast station to the given vif, 1932 * and send it to the FW. 1933 * Note that each P2P mac should have its own broadcast station. 1934 * 1935 * @mvm: the mvm component 1936 * @vif: the interface to which the broadcast station is added 1937 * @bsta: the broadcast station to add. */ 1938 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1939 { 1940 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1941 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1942 int ret; 1943 1944 lockdep_assert_held(&mvm->mutex); 1945 1946 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1947 if (ret) 1948 return ret; 1949 1950 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 1951 1952 if (ret) 1953 iwl_mvm_dealloc_int_sta(mvm, bsta); 1954 1955 return ret; 1956 } 1957 1958 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1959 { 1960 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1961 1962 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 1963 } 1964 1965 /* 1966 * Send the FW a request to remove the station from it's internal data 1967 * structures, and in addition remove it from the local data structure. 1968 */ 1969 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1970 { 1971 int ret; 1972 1973 lockdep_assert_held(&mvm->mutex); 1974 1975 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 1976 1977 iwl_mvm_dealloc_bcast_sta(mvm, vif); 1978 1979 return ret; 1980 } 1981 1982 /* 1983 * Allocate a new station entry for the multicast station to the given vif, 1984 * and send it to the FW. 1985 * Note that each AP/GO mac should have its own multicast station. 1986 * 1987 * @mvm: the mvm component 1988 * @vif: the interface to which the multicast station is added 1989 */ 1990 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1991 { 1992 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1993 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 1994 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 1995 const u8 *maddr = _maddr; 1996 struct iwl_trans_txq_scd_cfg cfg = { 1997 .fifo = IWL_MVM_TX_FIFO_MCAST, 1998 .sta_id = msta->sta_id, 1999 .tid = IWL_MAX_TID_COUNT, 2000 .aggregate = false, 2001 .frame_limit = IWL_FRAME_LIMIT, 2002 }; 2003 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2004 int ret; 2005 2006 lockdep_assert_held(&mvm->mutex); 2007 2008 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2009 vif->type != NL80211_IFTYPE_ADHOC)) 2010 return -ENOTSUPP; 2011 2012 /* 2013 * While in previous FWs we had to exclude cab queue from TFD queue 2014 * mask, now it is needed as any other queue. 2015 */ 2016 if (!iwl_mvm_has_new_tx_api(mvm) && 2017 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2018 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2019 &cfg, timeout); 2020 msta->tfd_queue_msk |= BIT(vif->cab_queue); 2021 } 2022 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2023 mvmvif->id, mvmvif->color); 2024 if (ret) { 2025 iwl_mvm_dealloc_int_sta(mvm, msta); 2026 return ret; 2027 } 2028 2029 /* 2030 * Enable cab queue after the ADD_STA command is sent. 2031 * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG 2032 * command with unknown station id, and for FW that doesn't support 2033 * station API since the cab queue is not included in the 2034 * tfd_queue_mask. 2035 */ 2036 if (iwl_mvm_has_new_tx_api(mvm)) { 2037 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue, 2038 msta->sta_id, 2039 IWL_MAX_TID_COUNT, 2040 timeout); 2041 mvmvif->cab_queue = queue; 2042 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2043 IWL_UCODE_TLV_API_STA_TYPE)) { 2044 /* 2045 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2046 * invalid, so make sure we use the queue we want. 2047 * Note that this is done here as we want to avoid making DQA 2048 * changes in mac80211 layer. 2049 */ 2050 if (vif->type == NL80211_IFTYPE_ADHOC) { 2051 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2052 mvmvif->cab_queue = vif->cab_queue; 2053 } 2054 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2055 &cfg, timeout); 2056 } 2057 2058 return 0; 2059 } 2060 2061 /* 2062 * Send the FW a request to remove the station from it's internal data 2063 * structures, and in addition remove it from the local data structure. 2064 */ 2065 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2066 { 2067 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2068 int ret; 2069 2070 lockdep_assert_held(&mvm->mutex); 2071 2072 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2073 2074 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue, 2075 IWL_MAX_TID_COUNT, 0); 2076 2077 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2078 if (ret) 2079 IWL_WARN(mvm, "Failed sending remove station\n"); 2080 2081 return ret; 2082 } 2083 2084 #define IWL_MAX_RX_BA_SESSIONS 16 2085 2086 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2087 { 2088 struct iwl_mvm_delba_notif notif = { 2089 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2090 .metadata.sync = 1, 2091 .delba.baid = baid, 2092 }; 2093 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2094 }; 2095 2096 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2097 struct iwl_mvm_baid_data *data) 2098 { 2099 int i; 2100 2101 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2102 2103 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2104 int j; 2105 struct iwl_mvm_reorder_buffer *reorder_buf = 2106 &data->reorder_buf[i]; 2107 2108 spin_lock_bh(&reorder_buf->lock); 2109 if (likely(!reorder_buf->num_stored)) { 2110 spin_unlock_bh(&reorder_buf->lock); 2111 continue; 2112 } 2113 2114 /* 2115 * This shouldn't happen in regular DELBA since the internal 2116 * delBA notification should trigger a release of all frames in 2117 * the reorder buffer. 2118 */ 2119 WARN_ON(1); 2120 2121 for (j = 0; j < reorder_buf->buf_size; j++) 2122 __skb_queue_purge(&reorder_buf->entries[j]); 2123 /* 2124 * Prevent timer re-arm. This prevents a very far fetched case 2125 * where we timed out on the notification. There may be prior 2126 * RX frames pending in the RX queue before the notification 2127 * that might get processed between now and the actual deletion 2128 * and we would re-arm the timer although we are deleting the 2129 * reorder buffer. 2130 */ 2131 reorder_buf->removed = true; 2132 spin_unlock_bh(&reorder_buf->lock); 2133 del_timer_sync(&reorder_buf->reorder_timer); 2134 } 2135 } 2136 2137 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2138 u32 sta_id, 2139 struct iwl_mvm_baid_data *data, 2140 u16 ssn, u8 buf_size) 2141 { 2142 int i; 2143 2144 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2145 struct iwl_mvm_reorder_buffer *reorder_buf = 2146 &data->reorder_buf[i]; 2147 int j; 2148 2149 reorder_buf->num_stored = 0; 2150 reorder_buf->head_sn = ssn; 2151 reorder_buf->buf_size = buf_size; 2152 /* rx reorder timer */ 2153 reorder_buf->reorder_timer.function = 2154 iwl_mvm_reorder_timer_expired; 2155 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 2156 init_timer(&reorder_buf->reorder_timer); 2157 spin_lock_init(&reorder_buf->lock); 2158 reorder_buf->mvm = mvm; 2159 reorder_buf->queue = i; 2160 reorder_buf->sta_id = sta_id; 2161 reorder_buf->valid = false; 2162 for (j = 0; j < reorder_buf->buf_size; j++) 2163 __skb_queue_head_init(&reorder_buf->entries[j]); 2164 } 2165 } 2166 2167 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2168 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2169 { 2170 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2171 struct iwl_mvm_add_sta_cmd cmd = {}; 2172 struct iwl_mvm_baid_data *baid_data = NULL; 2173 int ret; 2174 u32 status; 2175 2176 lockdep_assert_held(&mvm->mutex); 2177 2178 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2179 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2180 return -ENOSPC; 2181 } 2182 2183 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2184 /* 2185 * Allocate here so if allocation fails we can bail out early 2186 * before starting the BA session in the firmware 2187 */ 2188 baid_data = kzalloc(sizeof(*baid_data) + 2189 mvm->trans->num_rx_queues * 2190 sizeof(baid_data->reorder_buf[0]), 2191 GFP_KERNEL); 2192 if (!baid_data) 2193 return -ENOMEM; 2194 } 2195 2196 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2197 cmd.sta_id = mvm_sta->sta_id; 2198 cmd.add_modify = STA_MODE_MODIFY; 2199 if (start) { 2200 cmd.add_immediate_ba_tid = (u8) tid; 2201 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2202 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2203 } else { 2204 cmd.remove_immediate_ba_tid = (u8) tid; 2205 } 2206 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2207 STA_MODIFY_REMOVE_BA_TID; 2208 2209 status = ADD_STA_SUCCESS; 2210 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2211 iwl_mvm_add_sta_cmd_size(mvm), 2212 &cmd, &status); 2213 if (ret) 2214 goto out_free; 2215 2216 switch (status & IWL_ADD_STA_STATUS_MASK) { 2217 case ADD_STA_SUCCESS: 2218 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2219 start ? "start" : "stopp"); 2220 break; 2221 case ADD_STA_IMMEDIATE_BA_FAILURE: 2222 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2223 ret = -ENOSPC; 2224 break; 2225 default: 2226 ret = -EIO; 2227 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2228 start ? "start" : "stopp", status); 2229 break; 2230 } 2231 2232 if (ret) 2233 goto out_free; 2234 2235 if (start) { 2236 u8 baid; 2237 2238 mvm->rx_ba_sessions++; 2239 2240 if (!iwl_mvm_has_new_rx_api(mvm)) 2241 return 0; 2242 2243 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2244 ret = -EINVAL; 2245 goto out_free; 2246 } 2247 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2248 IWL_ADD_STA_BAID_SHIFT); 2249 baid_data->baid = baid; 2250 baid_data->timeout = timeout; 2251 baid_data->last_rx = jiffies; 2252 setup_timer(&baid_data->session_timer, 2253 iwl_mvm_rx_agg_session_expired, 2254 (unsigned long)&mvm->baid_map[baid]); 2255 baid_data->mvm = mvm; 2256 baid_data->tid = tid; 2257 baid_data->sta_id = mvm_sta->sta_id; 2258 2259 mvm_sta->tid_to_baid[tid] = baid; 2260 if (timeout) 2261 mod_timer(&baid_data->session_timer, 2262 TU_TO_EXP_TIME(timeout * 2)); 2263 2264 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 2265 baid_data, ssn, buf_size); 2266 /* 2267 * protect the BA data with RCU to cover a case where our 2268 * internal RX sync mechanism will timeout (not that it's 2269 * supposed to happen) and we will free the session data while 2270 * RX is being processed in parallel 2271 */ 2272 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2273 mvm_sta->sta_id, tid, baid); 2274 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2275 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2276 } else { 2277 u8 baid = mvm_sta->tid_to_baid[tid]; 2278 2279 if (mvm->rx_ba_sessions > 0) 2280 /* check that restart flow didn't zero the counter */ 2281 mvm->rx_ba_sessions--; 2282 if (!iwl_mvm_has_new_rx_api(mvm)) 2283 return 0; 2284 2285 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2286 return -EINVAL; 2287 2288 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2289 if (WARN_ON(!baid_data)) 2290 return -EINVAL; 2291 2292 /* synchronize all rx queues so we can safely delete */ 2293 iwl_mvm_free_reorder(mvm, baid_data); 2294 del_timer_sync(&baid_data->session_timer); 2295 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2296 kfree_rcu(baid_data, rcu_head); 2297 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2298 } 2299 return 0; 2300 2301 out_free: 2302 kfree(baid_data); 2303 return ret; 2304 } 2305 2306 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2307 int tid, u8 queue, bool start) 2308 { 2309 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2310 struct iwl_mvm_add_sta_cmd cmd = {}; 2311 int ret; 2312 u32 status; 2313 2314 lockdep_assert_held(&mvm->mutex); 2315 2316 if (start) { 2317 mvm_sta->tfd_queue_msk |= BIT(queue); 2318 mvm_sta->tid_disable_agg &= ~BIT(tid); 2319 } else { 2320 /* In DQA-mode the queue isn't removed on agg termination */ 2321 mvm_sta->tid_disable_agg |= BIT(tid); 2322 } 2323 2324 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2325 cmd.sta_id = mvm_sta->sta_id; 2326 cmd.add_modify = STA_MODE_MODIFY; 2327 if (!iwl_mvm_has_new_tx_api(mvm)) 2328 cmd.modify_mask = STA_MODIFY_QUEUES; 2329 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2330 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2331 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2332 2333 status = ADD_STA_SUCCESS; 2334 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2335 iwl_mvm_add_sta_cmd_size(mvm), 2336 &cmd, &status); 2337 if (ret) 2338 return ret; 2339 2340 switch (status & IWL_ADD_STA_STATUS_MASK) { 2341 case ADD_STA_SUCCESS: 2342 break; 2343 default: 2344 ret = -EIO; 2345 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2346 start ? "start" : "stopp", status); 2347 break; 2348 } 2349 2350 return ret; 2351 } 2352 2353 const u8 tid_to_mac80211_ac[] = { 2354 IEEE80211_AC_BE, 2355 IEEE80211_AC_BK, 2356 IEEE80211_AC_BK, 2357 IEEE80211_AC_BE, 2358 IEEE80211_AC_VI, 2359 IEEE80211_AC_VI, 2360 IEEE80211_AC_VO, 2361 IEEE80211_AC_VO, 2362 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2363 }; 2364 2365 static const u8 tid_to_ucode_ac[] = { 2366 AC_BE, 2367 AC_BK, 2368 AC_BK, 2369 AC_BE, 2370 AC_VI, 2371 AC_VI, 2372 AC_VO, 2373 AC_VO, 2374 }; 2375 2376 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2377 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2378 { 2379 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2380 struct iwl_mvm_tid_data *tid_data; 2381 u16 normalized_ssn; 2382 int txq_id; 2383 int ret; 2384 2385 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2386 return -EINVAL; 2387 2388 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2389 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 2390 mvmsta->tid_data[tid].state); 2391 return -ENXIO; 2392 } 2393 2394 lockdep_assert_held(&mvm->mutex); 2395 2396 spin_lock_bh(&mvmsta->lock); 2397 2398 /* possible race condition - we entered D0i3 while starting agg */ 2399 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2400 spin_unlock_bh(&mvmsta->lock); 2401 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2402 return -EIO; 2403 } 2404 2405 spin_lock(&mvm->queue_info_lock); 2406 2407 /* 2408 * Note the possible cases: 2409 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2410 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2411 * one and mark it as reserved 2412 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2413 * non-DQA mode, since the TXQ hasn't yet been allocated 2414 * Don't support case 3 for new TX path as it is not expected to happen 2415 * and aggregation will be offloaded soon anyway 2416 */ 2417 txq_id = mvmsta->tid_data[tid].txq_id; 2418 if (iwl_mvm_has_new_tx_api(mvm)) { 2419 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2420 ret = -ENXIO; 2421 goto release_locks; 2422 } 2423 } else if (unlikely(mvm->queue_info[txq_id].status == 2424 IWL_MVM_QUEUE_SHARED)) { 2425 ret = -ENXIO; 2426 IWL_DEBUG_TX_QUEUES(mvm, 2427 "Can't start tid %d agg on shared queue!\n", 2428 tid); 2429 goto release_locks; 2430 } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2431 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2432 IWL_MVM_DQA_MIN_DATA_QUEUE, 2433 IWL_MVM_DQA_MAX_DATA_QUEUE); 2434 if (txq_id < 0) { 2435 ret = txq_id; 2436 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2437 goto release_locks; 2438 } 2439 /* 2440 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2441 * an inactive queue from iwl_mvm_find_free_queue() is 2442 * certainly a bug 2443 */ 2444 WARN_ON(mvm->queue_info[txq_id].status == 2445 IWL_MVM_QUEUE_INACTIVE); 2446 2447 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2448 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2449 } 2450 2451 spin_unlock(&mvm->queue_info_lock); 2452 2453 IWL_DEBUG_TX_QUEUES(mvm, 2454 "AGG for tid %d will be on queue #%d\n", 2455 tid, txq_id); 2456 2457 tid_data = &mvmsta->tid_data[tid]; 2458 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2459 tid_data->txq_id = txq_id; 2460 *ssn = tid_data->ssn; 2461 2462 IWL_DEBUG_TX_QUEUES(mvm, 2463 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2464 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2465 tid_data->next_reclaimed); 2466 2467 /* 2468 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 2469 * to align the wrap around of ssn so we compare relevant values. 2470 */ 2471 normalized_ssn = tid_data->ssn; 2472 if (mvm->trans->cfg->gen2) 2473 normalized_ssn &= 0xff; 2474 2475 if (normalized_ssn == tid_data->next_reclaimed) { 2476 tid_data->state = IWL_AGG_STARTING; 2477 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2478 } else { 2479 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2480 } 2481 2482 ret = 0; 2483 goto out; 2484 2485 release_locks: 2486 spin_unlock(&mvm->queue_info_lock); 2487 out: 2488 spin_unlock_bh(&mvmsta->lock); 2489 2490 return ret; 2491 } 2492 2493 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2494 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2495 bool amsdu) 2496 { 2497 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2498 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2499 unsigned int wdg_timeout = 2500 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2501 int queue, ret; 2502 bool alloc_queue = true; 2503 enum iwl_mvm_queue_status queue_status; 2504 u16 ssn; 2505 2506 struct iwl_trans_txq_scd_cfg cfg = { 2507 .sta_id = mvmsta->sta_id, 2508 .tid = tid, 2509 .frame_limit = buf_size, 2510 .aggregate = true, 2511 }; 2512 2513 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2514 != IWL_MAX_TID_COUNT); 2515 2516 if (!mvm->trans->cfg->gen2) 2517 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2518 else 2519 buf_size = min_t(int, buf_size, 2520 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF); 2521 2522 spin_lock_bh(&mvmsta->lock); 2523 ssn = tid_data->ssn; 2524 queue = tid_data->txq_id; 2525 tid_data->state = IWL_AGG_ON; 2526 mvmsta->agg_tids |= BIT(tid); 2527 tid_data->ssn = 0xffff; 2528 tid_data->amsdu_in_ampdu_allowed = amsdu; 2529 spin_unlock_bh(&mvmsta->lock); 2530 2531 if (iwl_mvm_has_new_tx_api(mvm)) { 2532 /* 2533 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so 2534 * no need to check queue's status 2535 */ 2536 if (buf_size < mvmsta->max_agg_bufsize) 2537 return -ENOTSUPP; 2538 2539 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2540 if (ret) 2541 return -EIO; 2542 goto out; 2543 } 2544 2545 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2546 2547 spin_lock_bh(&mvm->queue_info_lock); 2548 queue_status = mvm->queue_info[queue].status; 2549 spin_unlock_bh(&mvm->queue_info_lock); 2550 2551 /* Maybe there is no need to even alloc a queue... */ 2552 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2553 alloc_queue = false; 2554 2555 /* 2556 * Only reconfig the SCD for the queue if the window size has 2557 * changed from current (become smaller) 2558 */ 2559 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2560 /* 2561 * If reconfiguring an existing queue, it first must be 2562 * drained 2563 */ 2564 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2565 BIT(queue)); 2566 if (ret) { 2567 IWL_ERR(mvm, 2568 "Error draining queue before reconfig\n"); 2569 return ret; 2570 } 2571 2572 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2573 mvmsta->sta_id, tid, 2574 buf_size, ssn); 2575 if (ret) { 2576 IWL_ERR(mvm, 2577 "Error reconfiguring TXQ #%d\n", queue); 2578 return ret; 2579 } 2580 } 2581 2582 if (alloc_queue) 2583 iwl_mvm_enable_txq(mvm, queue, 2584 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2585 &cfg, wdg_timeout); 2586 2587 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2588 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2589 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2590 if (ret) 2591 return -EIO; 2592 } 2593 2594 /* No need to mark as reserved */ 2595 spin_lock_bh(&mvm->queue_info_lock); 2596 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2597 spin_unlock_bh(&mvm->queue_info_lock); 2598 2599 out: 2600 /* 2601 * Even though in theory the peer could have different 2602 * aggregation reorder buffer sizes for different sessions, 2603 * our ucode doesn't allow for that and has a global limit 2604 * for each station. Therefore, use the minimum of all the 2605 * aggregation sessions and our default value. 2606 */ 2607 mvmsta->max_agg_bufsize = 2608 min(mvmsta->max_agg_bufsize, buf_size); 2609 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2610 2611 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2612 sta->addr, tid); 2613 2614 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2615 } 2616 2617 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2618 struct iwl_mvm_sta *mvmsta, 2619 u16 txq_id) 2620 { 2621 if (iwl_mvm_has_new_tx_api(mvm)) 2622 return; 2623 2624 spin_lock_bh(&mvm->queue_info_lock); 2625 /* 2626 * The TXQ is marked as reserved only if no traffic came through yet 2627 * This means no traffic has been sent on this TID (agg'd or not), so 2628 * we no longer have use for the queue. Since it hasn't even been 2629 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2630 * free. 2631 */ 2632 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2633 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2634 2635 spin_unlock_bh(&mvm->queue_info_lock); 2636 } 2637 2638 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2639 struct ieee80211_sta *sta, u16 tid) 2640 { 2641 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2642 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2643 u16 txq_id; 2644 int err; 2645 2646 /* 2647 * If mac80211 is cleaning its state, then say that we finished since 2648 * our state has been cleared anyway. 2649 */ 2650 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2651 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2652 return 0; 2653 } 2654 2655 spin_lock_bh(&mvmsta->lock); 2656 2657 txq_id = tid_data->txq_id; 2658 2659 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2660 mvmsta->sta_id, tid, txq_id, tid_data->state); 2661 2662 mvmsta->agg_tids &= ~BIT(tid); 2663 2664 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2665 2666 switch (tid_data->state) { 2667 case IWL_AGG_ON: 2668 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2669 2670 IWL_DEBUG_TX_QUEUES(mvm, 2671 "ssn = %d, next_recl = %d\n", 2672 tid_data->ssn, tid_data->next_reclaimed); 2673 2674 tid_data->ssn = 0xffff; 2675 tid_data->state = IWL_AGG_OFF; 2676 spin_unlock_bh(&mvmsta->lock); 2677 2678 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2679 2680 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2681 return 0; 2682 case IWL_AGG_STARTING: 2683 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2684 /* 2685 * The agg session has been stopped before it was set up. This 2686 * can happen when the AddBA timer times out for example. 2687 */ 2688 2689 /* No barriers since we are under mutex */ 2690 lockdep_assert_held(&mvm->mutex); 2691 2692 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2693 tid_data->state = IWL_AGG_OFF; 2694 err = 0; 2695 break; 2696 default: 2697 IWL_ERR(mvm, 2698 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2699 mvmsta->sta_id, tid, tid_data->state); 2700 IWL_ERR(mvm, 2701 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2702 err = -EINVAL; 2703 } 2704 2705 spin_unlock_bh(&mvmsta->lock); 2706 2707 return err; 2708 } 2709 2710 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2711 struct ieee80211_sta *sta, u16 tid) 2712 { 2713 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2714 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2715 u16 txq_id; 2716 enum iwl_mvm_agg_state old_state; 2717 2718 /* 2719 * First set the agg state to OFF to avoid calling 2720 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2721 */ 2722 spin_lock_bh(&mvmsta->lock); 2723 txq_id = tid_data->txq_id; 2724 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2725 mvmsta->sta_id, tid, txq_id, tid_data->state); 2726 old_state = tid_data->state; 2727 tid_data->state = IWL_AGG_OFF; 2728 mvmsta->agg_tids &= ~BIT(tid); 2729 spin_unlock_bh(&mvmsta->lock); 2730 2731 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2732 2733 if (old_state >= IWL_AGG_ON) { 2734 iwl_mvm_drain_sta(mvm, mvmsta, true); 2735 2736 if (iwl_mvm_has_new_tx_api(mvm)) { 2737 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2738 BIT(tid), 0)) 2739 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2740 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2741 } else { 2742 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2743 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2744 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2745 } 2746 2747 iwl_mvm_drain_sta(mvm, mvmsta, false); 2748 2749 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2750 } 2751 2752 return 0; 2753 } 2754 2755 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2756 { 2757 int i, max = -1, max_offs = -1; 2758 2759 lockdep_assert_held(&mvm->mutex); 2760 2761 /* Pick the unused key offset with the highest 'deleted' 2762 * counter. Every time a key is deleted, all the counters 2763 * are incremented and the one that was just deleted is 2764 * reset to zero. Thus, the highest counter is the one 2765 * that was deleted longest ago. Pick that one. 2766 */ 2767 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2768 if (test_bit(i, mvm->fw_key_table)) 2769 continue; 2770 if (mvm->fw_key_deleted[i] > max) { 2771 max = mvm->fw_key_deleted[i]; 2772 max_offs = i; 2773 } 2774 } 2775 2776 if (max_offs < 0) 2777 return STA_KEY_IDX_INVALID; 2778 2779 return max_offs; 2780 } 2781 2782 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2783 struct ieee80211_vif *vif, 2784 struct ieee80211_sta *sta) 2785 { 2786 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2787 2788 if (sta) 2789 return iwl_mvm_sta_from_mac80211(sta); 2790 2791 /* 2792 * The device expects GTKs for station interfaces to be 2793 * installed as GTKs for the AP station. If we have no 2794 * station ID, then use AP's station ID. 2795 */ 2796 if (vif->type == NL80211_IFTYPE_STATION && 2797 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 2798 u8 sta_id = mvmvif->ap_sta_id; 2799 2800 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2801 lockdep_is_held(&mvm->mutex)); 2802 2803 /* 2804 * It is possible that the 'sta' parameter is NULL, 2805 * for example when a GTK is removed - the sta_id will then 2806 * be the AP ID, and no station was passed by mac80211. 2807 */ 2808 if (IS_ERR_OR_NULL(sta)) 2809 return NULL; 2810 2811 return iwl_mvm_sta_from_mac80211(sta); 2812 } 2813 2814 return NULL; 2815 } 2816 2817 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2818 u32 sta_id, 2819 struct ieee80211_key_conf *key, bool mcast, 2820 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2821 u8 key_offset) 2822 { 2823 union { 2824 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2825 struct iwl_mvm_add_sta_key_cmd cmd; 2826 } u = {}; 2827 __le16 key_flags; 2828 int ret; 2829 u32 status; 2830 u16 keyidx; 2831 u64 pn = 0; 2832 int i, size; 2833 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2834 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2835 2836 if (sta_id == IWL_MVM_INVALID_STA) 2837 return -EINVAL; 2838 2839 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 2840 STA_KEY_FLG_KEYID_MSK; 2841 key_flags = cpu_to_le16(keyidx); 2842 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2843 2844 switch (key->cipher) { 2845 case WLAN_CIPHER_SUITE_TKIP: 2846 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2847 if (new_api) { 2848 memcpy((void *)&u.cmd.tx_mic_key, 2849 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 2850 IWL_MIC_KEY_SIZE); 2851 2852 memcpy((void *)&u.cmd.rx_mic_key, 2853 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 2854 IWL_MIC_KEY_SIZE); 2855 pn = atomic64_read(&key->tx_pn); 2856 2857 } else { 2858 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 2859 for (i = 0; i < 5; i++) 2860 u.cmd_v1.tkip_rx_ttak[i] = 2861 cpu_to_le16(tkip_p1k[i]); 2862 } 2863 memcpy(u.cmd.common.key, key->key, key->keylen); 2864 break; 2865 case WLAN_CIPHER_SUITE_CCMP: 2866 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2867 memcpy(u.cmd.common.key, key->key, key->keylen); 2868 if (new_api) 2869 pn = atomic64_read(&key->tx_pn); 2870 break; 2871 case WLAN_CIPHER_SUITE_WEP104: 2872 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2873 /* fall through */ 2874 case WLAN_CIPHER_SUITE_WEP40: 2875 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2876 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 2877 break; 2878 case WLAN_CIPHER_SUITE_GCMP_256: 2879 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2880 /* fall through */ 2881 case WLAN_CIPHER_SUITE_GCMP: 2882 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2883 memcpy(u.cmd.common.key, key->key, key->keylen); 2884 if (new_api) 2885 pn = atomic64_read(&key->tx_pn); 2886 break; 2887 default: 2888 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2889 memcpy(u.cmd.common.key, key->key, key->keylen); 2890 } 2891 2892 if (mcast) 2893 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2894 2895 u.cmd.common.key_offset = key_offset; 2896 u.cmd.common.key_flags = key_flags; 2897 u.cmd.common.sta_id = sta_id; 2898 2899 if (new_api) { 2900 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 2901 size = sizeof(u.cmd); 2902 } else { 2903 size = sizeof(u.cmd_v1); 2904 } 2905 2906 status = ADD_STA_SUCCESS; 2907 if (cmd_flags & CMD_ASYNC) 2908 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 2909 &u.cmd); 2910 else 2911 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 2912 &u.cmd, &status); 2913 2914 switch (status) { 2915 case ADD_STA_SUCCESS: 2916 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2917 break; 2918 default: 2919 ret = -EIO; 2920 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2921 break; 2922 } 2923 2924 return ret; 2925 } 2926 2927 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2928 struct ieee80211_key_conf *keyconf, 2929 u8 sta_id, bool remove_key) 2930 { 2931 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 2932 2933 /* verify the key details match the required command's expectations */ 2934 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 2935 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 2936 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 2937 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 2938 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 2939 return -EINVAL; 2940 2941 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 2942 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 2943 return -EINVAL; 2944 2945 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 2946 igtk_cmd.sta_id = cpu_to_le32(sta_id); 2947 2948 if (remove_key) { 2949 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 2950 } else { 2951 struct ieee80211_key_seq seq; 2952 const u8 *pn; 2953 2954 switch (keyconf->cipher) { 2955 case WLAN_CIPHER_SUITE_AES_CMAC: 2956 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 2957 break; 2958 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 2959 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 2960 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 2961 break; 2962 default: 2963 return -EINVAL; 2964 } 2965 2966 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 2967 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2968 igtk_cmd.ctrl_flags |= 2969 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 2970 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2971 pn = seq.aes_cmac.pn; 2972 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 2973 ((u64) pn[4] << 8) | 2974 ((u64) pn[3] << 16) | 2975 ((u64) pn[2] << 24) | 2976 ((u64) pn[1] << 32) | 2977 ((u64) pn[0] << 40)); 2978 } 2979 2980 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 2981 remove_key ? "removing" : "installing", 2982 igtk_cmd.sta_id); 2983 2984 if (!iwl_mvm_has_new_rx_api(mvm)) { 2985 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 2986 .ctrl_flags = igtk_cmd.ctrl_flags, 2987 .key_id = igtk_cmd.key_id, 2988 .sta_id = igtk_cmd.sta_id, 2989 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 2990 }; 2991 2992 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 2993 ARRAY_SIZE(igtk_cmd_v1.igtk)); 2994 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2995 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 2996 } 2997 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2998 sizeof(igtk_cmd), &igtk_cmd); 2999 } 3000 3001 3002 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3003 struct ieee80211_vif *vif, 3004 struct ieee80211_sta *sta) 3005 { 3006 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3007 3008 if (sta) 3009 return sta->addr; 3010 3011 if (vif->type == NL80211_IFTYPE_STATION && 3012 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3013 u8 sta_id = mvmvif->ap_sta_id; 3014 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3015 lockdep_is_held(&mvm->mutex)); 3016 return sta->addr; 3017 } 3018 3019 3020 return NULL; 3021 } 3022 3023 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3024 struct ieee80211_vif *vif, 3025 struct ieee80211_sta *sta, 3026 struct ieee80211_key_conf *keyconf, 3027 u8 key_offset, 3028 bool mcast) 3029 { 3030 int ret; 3031 const u8 *addr; 3032 struct ieee80211_key_seq seq; 3033 u16 p1k[5]; 3034 u32 sta_id; 3035 3036 if (sta) { 3037 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3038 3039 sta_id = mvm_sta->sta_id; 3040 } else if (vif->type == NL80211_IFTYPE_AP && 3041 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3042 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3043 3044 sta_id = mvmvif->mcast_sta.sta_id; 3045 } else { 3046 IWL_ERR(mvm, "Failed to find station id\n"); 3047 return -EINVAL; 3048 } 3049 3050 switch (keyconf->cipher) { 3051 case WLAN_CIPHER_SUITE_TKIP: 3052 if (vif->type == NL80211_IFTYPE_AP) { 3053 ret = -EINVAL; 3054 break; 3055 } 3056 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3057 /* get phase 1 key from mac80211 */ 3058 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3059 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3060 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3061 seq.tkip.iv32, p1k, 0, key_offset); 3062 break; 3063 case WLAN_CIPHER_SUITE_CCMP: 3064 case WLAN_CIPHER_SUITE_WEP40: 3065 case WLAN_CIPHER_SUITE_WEP104: 3066 case WLAN_CIPHER_SUITE_GCMP: 3067 case WLAN_CIPHER_SUITE_GCMP_256: 3068 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3069 0, NULL, 0, key_offset); 3070 break; 3071 default: 3072 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3073 0, NULL, 0, key_offset); 3074 } 3075 3076 return ret; 3077 } 3078 3079 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3080 struct ieee80211_key_conf *keyconf, 3081 bool mcast) 3082 { 3083 union { 3084 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3085 struct iwl_mvm_add_sta_key_cmd cmd; 3086 } u = {}; 3087 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3088 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3089 __le16 key_flags; 3090 int ret, size; 3091 u32 status; 3092 3093 if (sta_id == IWL_MVM_INVALID_STA) 3094 return -EINVAL; 3095 3096 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3097 STA_KEY_FLG_KEYID_MSK); 3098 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3099 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3100 3101 if (mcast) 3102 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3103 3104 /* 3105 * The fields assigned here are in the same location at the start 3106 * of the command, so we can do this union trick. 3107 */ 3108 u.cmd.common.key_flags = key_flags; 3109 u.cmd.common.key_offset = keyconf->hw_key_idx; 3110 u.cmd.common.sta_id = sta_id; 3111 3112 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3113 3114 status = ADD_STA_SUCCESS; 3115 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3116 &status); 3117 3118 switch (status) { 3119 case ADD_STA_SUCCESS: 3120 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3121 break; 3122 default: 3123 ret = -EIO; 3124 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3125 break; 3126 } 3127 3128 return ret; 3129 } 3130 3131 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3132 struct ieee80211_vif *vif, 3133 struct ieee80211_sta *sta, 3134 struct ieee80211_key_conf *keyconf, 3135 u8 key_offset) 3136 { 3137 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3138 struct iwl_mvm_sta *mvm_sta; 3139 u8 sta_id = IWL_MVM_INVALID_STA; 3140 int ret; 3141 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3142 3143 lockdep_assert_held(&mvm->mutex); 3144 3145 if (vif->type != NL80211_IFTYPE_AP || 3146 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3147 /* Get the station id from the mvm local station table */ 3148 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3149 if (!mvm_sta) { 3150 IWL_ERR(mvm, "Failed to find station\n"); 3151 return -EINVAL; 3152 } 3153 sta_id = mvm_sta->sta_id; 3154 3155 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3156 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3157 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3158 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, 3159 false); 3160 goto end; 3161 } 3162 3163 /* 3164 * It is possible that the 'sta' parameter is NULL, and thus 3165 * there is a need to retrieve the sta from the local station 3166 * table. 3167 */ 3168 if (!sta) { 3169 sta = rcu_dereference_protected( 3170 mvm->fw_id_to_mac_id[sta_id], 3171 lockdep_is_held(&mvm->mutex)); 3172 if (IS_ERR_OR_NULL(sta)) { 3173 IWL_ERR(mvm, "Invalid station id\n"); 3174 return -EINVAL; 3175 } 3176 } 3177 3178 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3179 return -EINVAL; 3180 } 3181 3182 /* If the key_offset is not pre-assigned, we need to find a 3183 * new offset to use. In normal cases, the offset is not 3184 * pre-assigned, but during HW_RESTART we want to reuse the 3185 * same indices, so we pass them when this function is called. 3186 * 3187 * In D3 entry, we need to hardcoded the indices (because the 3188 * firmware hardcodes the PTK offset to 0). In this case, we 3189 * need to make sure we don't overwrite the hw_key_idx in the 3190 * keyconf structure, because otherwise we cannot configure 3191 * the original ones back when resuming. 3192 */ 3193 if (key_offset == STA_KEY_IDX_INVALID) { 3194 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3195 if (key_offset == STA_KEY_IDX_INVALID) 3196 return -ENOSPC; 3197 keyconf->hw_key_idx = key_offset; 3198 } 3199 3200 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3201 if (ret) 3202 goto end; 3203 3204 /* 3205 * For WEP, the same key is used for multicast and unicast. Upload it 3206 * again, using the same key offset, and now pointing the other one 3207 * to the same key slot (offset). 3208 * If this fails, remove the original as well. 3209 */ 3210 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3211 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3212 sta) { 3213 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3214 key_offset, !mcast); 3215 if (ret) { 3216 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3217 goto end; 3218 } 3219 } 3220 3221 __set_bit(key_offset, mvm->fw_key_table); 3222 3223 end: 3224 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3225 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3226 sta ? sta->addr : zero_addr, ret); 3227 return ret; 3228 } 3229 3230 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3231 struct ieee80211_vif *vif, 3232 struct ieee80211_sta *sta, 3233 struct ieee80211_key_conf *keyconf) 3234 { 3235 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3236 struct iwl_mvm_sta *mvm_sta; 3237 u8 sta_id = IWL_MVM_INVALID_STA; 3238 int ret, i; 3239 3240 lockdep_assert_held(&mvm->mutex); 3241 3242 /* Get the station from the mvm local station table */ 3243 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3244 if (mvm_sta) 3245 sta_id = mvm_sta->sta_id; 3246 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3247 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3248 3249 3250 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3251 keyconf->keyidx, sta_id); 3252 3253 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3254 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3255 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3256 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3257 3258 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3259 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3260 keyconf->hw_key_idx); 3261 return -ENOENT; 3262 } 3263 3264 /* track which key was deleted last */ 3265 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3266 if (mvm->fw_key_deleted[i] < U8_MAX) 3267 mvm->fw_key_deleted[i]++; 3268 } 3269 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3270 3271 if (sta && !mvm_sta) { 3272 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3273 return 0; 3274 } 3275 3276 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3277 if (ret) 3278 return ret; 3279 3280 /* delete WEP key twice to get rid of (now useless) offset */ 3281 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3282 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3283 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3284 3285 return ret; 3286 } 3287 3288 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3289 struct ieee80211_vif *vif, 3290 struct ieee80211_key_conf *keyconf, 3291 struct ieee80211_sta *sta, u32 iv32, 3292 u16 *phase1key) 3293 { 3294 struct iwl_mvm_sta *mvm_sta; 3295 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3296 3297 rcu_read_lock(); 3298 3299 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3300 if (WARN_ON_ONCE(!mvm_sta)) 3301 goto unlock; 3302 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3303 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3304 3305 unlock: 3306 rcu_read_unlock(); 3307 } 3308 3309 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3310 struct ieee80211_sta *sta) 3311 { 3312 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3313 struct iwl_mvm_add_sta_cmd cmd = { 3314 .add_modify = STA_MODE_MODIFY, 3315 .sta_id = mvmsta->sta_id, 3316 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3317 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3318 }; 3319 int ret; 3320 3321 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3322 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3323 if (ret) 3324 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3325 } 3326 3327 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3328 struct ieee80211_sta *sta, 3329 enum ieee80211_frame_release_type reason, 3330 u16 cnt, u16 tids, bool more_data, 3331 bool single_sta_queue) 3332 { 3333 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3334 struct iwl_mvm_add_sta_cmd cmd = { 3335 .add_modify = STA_MODE_MODIFY, 3336 .sta_id = mvmsta->sta_id, 3337 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3338 .sleep_tx_count = cpu_to_le16(cnt), 3339 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3340 }; 3341 int tid, ret; 3342 unsigned long _tids = tids; 3343 3344 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3345 * Note that this field is reserved and unused by firmware not 3346 * supporting GO uAPSD, so it's safe to always do this. 3347 */ 3348 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3349 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3350 3351 /* If we're releasing frames from aggregation or dqa queues then check 3352 * if all the queues that we're releasing frames from, combined, have: 3353 * - more frames than the service period, in which case more_data 3354 * needs to be set 3355 * - fewer than 'cnt' frames, in which case we need to adjust the 3356 * firmware command (but do that unconditionally) 3357 */ 3358 if (single_sta_queue) { 3359 int remaining = cnt; 3360 int sleep_tx_count; 3361 3362 spin_lock_bh(&mvmsta->lock); 3363 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3364 struct iwl_mvm_tid_data *tid_data; 3365 u16 n_queued; 3366 3367 tid_data = &mvmsta->tid_data[tid]; 3368 3369 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3370 if (n_queued > remaining) { 3371 more_data = true; 3372 remaining = 0; 3373 break; 3374 } 3375 remaining -= n_queued; 3376 } 3377 sleep_tx_count = cnt - remaining; 3378 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3379 mvmsta->sleep_tx_count = sleep_tx_count; 3380 spin_unlock_bh(&mvmsta->lock); 3381 3382 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3383 if (WARN_ON(cnt - remaining == 0)) { 3384 ieee80211_sta_eosp(sta); 3385 return; 3386 } 3387 } 3388 3389 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3390 if (more_data) 3391 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3392 3393 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3394 mvmsta->next_status_eosp = true; 3395 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3396 } else { 3397 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3398 } 3399 3400 /* block the Tx queues until the FW updated the sleep Tx count */ 3401 iwl_trans_block_txq_ptrs(mvm->trans, true); 3402 3403 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3404 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3405 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3406 if (ret) 3407 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3408 } 3409 3410 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3411 struct iwl_rx_cmd_buffer *rxb) 3412 { 3413 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3414 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3415 struct ieee80211_sta *sta; 3416 u32 sta_id = le32_to_cpu(notif->sta_id); 3417 3418 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3419 return; 3420 3421 rcu_read_lock(); 3422 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3423 if (!IS_ERR_OR_NULL(sta)) 3424 ieee80211_sta_eosp(sta); 3425 rcu_read_unlock(); 3426 } 3427 3428 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3429 struct iwl_mvm_sta *mvmsta, bool disable) 3430 { 3431 struct iwl_mvm_add_sta_cmd cmd = { 3432 .add_modify = STA_MODE_MODIFY, 3433 .sta_id = mvmsta->sta_id, 3434 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3435 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3436 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3437 }; 3438 int ret; 3439 3440 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3441 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3442 if (ret) 3443 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3444 } 3445 3446 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3447 struct ieee80211_sta *sta, 3448 bool disable) 3449 { 3450 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3451 3452 spin_lock_bh(&mvm_sta->lock); 3453 3454 if (mvm_sta->disable_tx == disable) { 3455 spin_unlock_bh(&mvm_sta->lock); 3456 return; 3457 } 3458 3459 mvm_sta->disable_tx = disable; 3460 3461 /* Tell mac80211 to start/stop queuing tx for this station */ 3462 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3463 3464 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3465 3466 spin_unlock_bh(&mvm_sta->lock); 3467 } 3468 3469 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3470 struct iwl_mvm_vif *mvmvif, 3471 struct iwl_mvm_int_sta *sta, 3472 bool disable) 3473 { 3474 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3475 struct iwl_mvm_add_sta_cmd cmd = { 3476 .add_modify = STA_MODE_MODIFY, 3477 .sta_id = sta->sta_id, 3478 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3479 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3480 .mac_id_n_color = cpu_to_le32(id), 3481 }; 3482 int ret; 3483 3484 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3485 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3486 if (ret) 3487 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3488 } 3489 3490 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3491 struct iwl_mvm_vif *mvmvif, 3492 bool disable) 3493 { 3494 struct ieee80211_sta *sta; 3495 struct iwl_mvm_sta *mvm_sta; 3496 int i; 3497 3498 lockdep_assert_held(&mvm->mutex); 3499 3500 /* Block/unblock all the stations of the given mvmvif */ 3501 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3502 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3503 lockdep_is_held(&mvm->mutex)); 3504 if (IS_ERR_OR_NULL(sta)) 3505 continue; 3506 3507 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3508 if (mvm_sta->mac_id_n_color != 3509 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3510 continue; 3511 3512 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3513 } 3514 3515 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3516 return; 3517 3518 /* Need to block/unblock also multicast station */ 3519 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3520 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3521 &mvmvif->mcast_sta, disable); 3522 3523 /* 3524 * Only unblock the broadcast station (FW blocks it for immediate 3525 * quiet, not the driver) 3526 */ 3527 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3528 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3529 &mvmvif->bcast_sta, disable); 3530 } 3531 3532 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3533 { 3534 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3535 struct iwl_mvm_sta *mvmsta; 3536 3537 rcu_read_lock(); 3538 3539 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3540 3541 if (!WARN_ON(!mvmsta)) 3542 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3543 3544 rcu_read_unlock(); 3545 } 3546 3547 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3548 { 3549 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3550 3551 /* 3552 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 3553 * to align the wrap around of ssn so we compare relevant values. 3554 */ 3555 if (mvm->trans->cfg->gen2) 3556 sn &= 0xff; 3557 3558 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3559 } 3560