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 = ADD_STA_SUCCESS; 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->tid = data->tid; 2162 reorder_buf->valid = false; 2163 for (j = 0; j < reorder_buf->buf_size; j++) 2164 __skb_queue_head_init(&reorder_buf->entries[j]); 2165 } 2166 } 2167 2168 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2169 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2170 { 2171 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2172 struct iwl_mvm_add_sta_cmd cmd = {}; 2173 struct iwl_mvm_baid_data *baid_data = NULL; 2174 int ret; 2175 u32 status; 2176 2177 lockdep_assert_held(&mvm->mutex); 2178 2179 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2180 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2181 return -ENOSPC; 2182 } 2183 2184 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2185 /* 2186 * Allocate here so if allocation fails we can bail out early 2187 * before starting the BA session in the firmware 2188 */ 2189 baid_data = kzalloc(sizeof(*baid_data) + 2190 mvm->trans->num_rx_queues * 2191 sizeof(baid_data->reorder_buf[0]), 2192 GFP_KERNEL); 2193 if (!baid_data) 2194 return -ENOMEM; 2195 } 2196 2197 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2198 cmd.sta_id = mvm_sta->sta_id; 2199 cmd.add_modify = STA_MODE_MODIFY; 2200 if (start) { 2201 cmd.add_immediate_ba_tid = (u8) tid; 2202 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2203 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2204 } else { 2205 cmd.remove_immediate_ba_tid = (u8) tid; 2206 } 2207 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2208 STA_MODIFY_REMOVE_BA_TID; 2209 2210 status = ADD_STA_SUCCESS; 2211 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2212 iwl_mvm_add_sta_cmd_size(mvm), 2213 &cmd, &status); 2214 if (ret) 2215 goto out_free; 2216 2217 switch (status & IWL_ADD_STA_STATUS_MASK) { 2218 case ADD_STA_SUCCESS: 2219 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2220 start ? "start" : "stopp"); 2221 break; 2222 case ADD_STA_IMMEDIATE_BA_FAILURE: 2223 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2224 ret = -ENOSPC; 2225 break; 2226 default: 2227 ret = -EIO; 2228 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2229 start ? "start" : "stopp", status); 2230 break; 2231 } 2232 2233 if (ret) 2234 goto out_free; 2235 2236 if (start) { 2237 u8 baid; 2238 2239 mvm->rx_ba_sessions++; 2240 2241 if (!iwl_mvm_has_new_rx_api(mvm)) 2242 return 0; 2243 2244 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2245 ret = -EINVAL; 2246 goto out_free; 2247 } 2248 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2249 IWL_ADD_STA_BAID_SHIFT); 2250 baid_data->baid = baid; 2251 baid_data->timeout = timeout; 2252 baid_data->last_rx = jiffies; 2253 setup_timer(&baid_data->session_timer, 2254 iwl_mvm_rx_agg_session_expired, 2255 (unsigned long)&mvm->baid_map[baid]); 2256 baid_data->mvm = mvm; 2257 baid_data->tid = tid; 2258 baid_data->sta_id = mvm_sta->sta_id; 2259 2260 mvm_sta->tid_to_baid[tid] = baid; 2261 if (timeout) 2262 mod_timer(&baid_data->session_timer, 2263 TU_TO_EXP_TIME(timeout * 2)); 2264 2265 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 2266 baid_data, ssn, buf_size); 2267 /* 2268 * protect the BA data with RCU to cover a case where our 2269 * internal RX sync mechanism will timeout (not that it's 2270 * supposed to happen) and we will free the session data while 2271 * RX is being processed in parallel 2272 */ 2273 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2274 mvm_sta->sta_id, tid, baid); 2275 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2276 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2277 } else { 2278 u8 baid = mvm_sta->tid_to_baid[tid]; 2279 2280 if (mvm->rx_ba_sessions > 0) 2281 /* check that restart flow didn't zero the counter */ 2282 mvm->rx_ba_sessions--; 2283 if (!iwl_mvm_has_new_rx_api(mvm)) 2284 return 0; 2285 2286 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2287 return -EINVAL; 2288 2289 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2290 if (WARN_ON(!baid_data)) 2291 return -EINVAL; 2292 2293 /* synchronize all rx queues so we can safely delete */ 2294 iwl_mvm_free_reorder(mvm, baid_data); 2295 del_timer_sync(&baid_data->session_timer); 2296 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2297 kfree_rcu(baid_data, rcu_head); 2298 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2299 } 2300 return 0; 2301 2302 out_free: 2303 kfree(baid_data); 2304 return ret; 2305 } 2306 2307 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2308 int tid, u8 queue, bool start) 2309 { 2310 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2311 struct iwl_mvm_add_sta_cmd cmd = {}; 2312 int ret; 2313 u32 status; 2314 2315 lockdep_assert_held(&mvm->mutex); 2316 2317 if (start) { 2318 mvm_sta->tfd_queue_msk |= BIT(queue); 2319 mvm_sta->tid_disable_agg &= ~BIT(tid); 2320 } else { 2321 /* In DQA-mode the queue isn't removed on agg termination */ 2322 mvm_sta->tid_disable_agg |= BIT(tid); 2323 } 2324 2325 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2326 cmd.sta_id = mvm_sta->sta_id; 2327 cmd.add_modify = STA_MODE_MODIFY; 2328 if (!iwl_mvm_has_new_tx_api(mvm)) 2329 cmd.modify_mask = STA_MODIFY_QUEUES; 2330 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2331 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2332 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2333 2334 status = ADD_STA_SUCCESS; 2335 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2336 iwl_mvm_add_sta_cmd_size(mvm), 2337 &cmd, &status); 2338 if (ret) 2339 return ret; 2340 2341 switch (status & IWL_ADD_STA_STATUS_MASK) { 2342 case ADD_STA_SUCCESS: 2343 break; 2344 default: 2345 ret = -EIO; 2346 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2347 start ? "start" : "stopp", status); 2348 break; 2349 } 2350 2351 return ret; 2352 } 2353 2354 const u8 tid_to_mac80211_ac[] = { 2355 IEEE80211_AC_BE, 2356 IEEE80211_AC_BK, 2357 IEEE80211_AC_BK, 2358 IEEE80211_AC_BE, 2359 IEEE80211_AC_VI, 2360 IEEE80211_AC_VI, 2361 IEEE80211_AC_VO, 2362 IEEE80211_AC_VO, 2363 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2364 }; 2365 2366 static const u8 tid_to_ucode_ac[] = { 2367 AC_BE, 2368 AC_BK, 2369 AC_BK, 2370 AC_BE, 2371 AC_VI, 2372 AC_VI, 2373 AC_VO, 2374 AC_VO, 2375 }; 2376 2377 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2378 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2379 { 2380 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2381 struct iwl_mvm_tid_data *tid_data; 2382 u16 normalized_ssn; 2383 int txq_id; 2384 int ret; 2385 2386 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2387 return -EINVAL; 2388 2389 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2390 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2391 IWL_ERR(mvm, 2392 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2393 mvmsta->tid_data[tid].state); 2394 return -ENXIO; 2395 } 2396 2397 lockdep_assert_held(&mvm->mutex); 2398 2399 spin_lock_bh(&mvmsta->lock); 2400 2401 /* possible race condition - we entered D0i3 while starting agg */ 2402 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2403 spin_unlock_bh(&mvmsta->lock); 2404 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2405 return -EIO; 2406 } 2407 2408 spin_lock(&mvm->queue_info_lock); 2409 2410 /* 2411 * Note the possible cases: 2412 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2413 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2414 * one and mark it as reserved 2415 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2416 * non-DQA mode, since the TXQ hasn't yet been allocated 2417 * Don't support case 3 for new TX path as it is not expected to happen 2418 * and aggregation will be offloaded soon anyway 2419 */ 2420 txq_id = mvmsta->tid_data[tid].txq_id; 2421 if (iwl_mvm_has_new_tx_api(mvm)) { 2422 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2423 ret = -ENXIO; 2424 goto release_locks; 2425 } 2426 } else if (unlikely(mvm->queue_info[txq_id].status == 2427 IWL_MVM_QUEUE_SHARED)) { 2428 ret = -ENXIO; 2429 IWL_DEBUG_TX_QUEUES(mvm, 2430 "Can't start tid %d agg on shared queue!\n", 2431 tid); 2432 goto release_locks; 2433 } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2434 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2435 IWL_MVM_DQA_MIN_DATA_QUEUE, 2436 IWL_MVM_DQA_MAX_DATA_QUEUE); 2437 if (txq_id < 0) { 2438 ret = txq_id; 2439 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2440 goto release_locks; 2441 } 2442 /* 2443 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2444 * an inactive queue from iwl_mvm_find_free_queue() is 2445 * certainly a bug 2446 */ 2447 WARN_ON(mvm->queue_info[txq_id].status == 2448 IWL_MVM_QUEUE_INACTIVE); 2449 2450 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2451 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2452 } 2453 2454 spin_unlock(&mvm->queue_info_lock); 2455 2456 IWL_DEBUG_TX_QUEUES(mvm, 2457 "AGG for tid %d will be on queue #%d\n", 2458 tid, txq_id); 2459 2460 tid_data = &mvmsta->tid_data[tid]; 2461 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2462 tid_data->txq_id = txq_id; 2463 *ssn = tid_data->ssn; 2464 2465 IWL_DEBUG_TX_QUEUES(mvm, 2466 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2467 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2468 tid_data->next_reclaimed); 2469 2470 /* 2471 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 2472 * to align the wrap around of ssn so we compare relevant values. 2473 */ 2474 normalized_ssn = tid_data->ssn; 2475 if (mvm->trans->cfg->gen2) 2476 normalized_ssn &= 0xff; 2477 2478 if (normalized_ssn == tid_data->next_reclaimed) { 2479 tid_data->state = IWL_AGG_STARTING; 2480 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2481 } else { 2482 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2483 } 2484 2485 ret = 0; 2486 goto out; 2487 2488 release_locks: 2489 spin_unlock(&mvm->queue_info_lock); 2490 out: 2491 spin_unlock_bh(&mvmsta->lock); 2492 2493 return ret; 2494 } 2495 2496 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2497 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2498 bool amsdu) 2499 { 2500 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2501 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2502 unsigned int wdg_timeout = 2503 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2504 int queue, ret; 2505 bool alloc_queue = true; 2506 enum iwl_mvm_queue_status queue_status; 2507 u16 ssn; 2508 2509 struct iwl_trans_txq_scd_cfg cfg = { 2510 .sta_id = mvmsta->sta_id, 2511 .tid = tid, 2512 .frame_limit = buf_size, 2513 .aggregate = true, 2514 }; 2515 2516 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2517 != IWL_MAX_TID_COUNT); 2518 2519 if (!mvm->trans->cfg->gen2) 2520 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2521 else 2522 buf_size = min_t(int, buf_size, 2523 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF); 2524 2525 spin_lock_bh(&mvmsta->lock); 2526 ssn = tid_data->ssn; 2527 queue = tid_data->txq_id; 2528 tid_data->state = IWL_AGG_ON; 2529 mvmsta->agg_tids |= BIT(tid); 2530 tid_data->ssn = 0xffff; 2531 tid_data->amsdu_in_ampdu_allowed = amsdu; 2532 spin_unlock_bh(&mvmsta->lock); 2533 2534 if (iwl_mvm_has_new_tx_api(mvm)) { 2535 /* 2536 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so 2537 * no need to check queue's status 2538 */ 2539 if (buf_size < mvmsta->max_agg_bufsize) 2540 return -ENOTSUPP; 2541 2542 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2543 if (ret) 2544 return -EIO; 2545 goto out; 2546 } 2547 2548 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2549 2550 spin_lock_bh(&mvm->queue_info_lock); 2551 queue_status = mvm->queue_info[queue].status; 2552 spin_unlock_bh(&mvm->queue_info_lock); 2553 2554 /* Maybe there is no need to even alloc a queue... */ 2555 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2556 alloc_queue = false; 2557 2558 /* 2559 * Only reconfig the SCD for the queue if the window size has 2560 * changed from current (become smaller) 2561 */ 2562 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2563 /* 2564 * If reconfiguring an existing queue, it first must be 2565 * drained 2566 */ 2567 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2568 BIT(queue)); 2569 if (ret) { 2570 IWL_ERR(mvm, 2571 "Error draining queue before reconfig\n"); 2572 return ret; 2573 } 2574 2575 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2576 mvmsta->sta_id, tid, 2577 buf_size, ssn); 2578 if (ret) { 2579 IWL_ERR(mvm, 2580 "Error reconfiguring TXQ #%d\n", queue); 2581 return ret; 2582 } 2583 } 2584 2585 if (alloc_queue) 2586 iwl_mvm_enable_txq(mvm, queue, 2587 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2588 &cfg, wdg_timeout); 2589 2590 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2591 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2592 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2593 if (ret) 2594 return -EIO; 2595 } 2596 2597 /* No need to mark as reserved */ 2598 spin_lock_bh(&mvm->queue_info_lock); 2599 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2600 spin_unlock_bh(&mvm->queue_info_lock); 2601 2602 out: 2603 /* 2604 * Even though in theory the peer could have different 2605 * aggregation reorder buffer sizes for different sessions, 2606 * our ucode doesn't allow for that and has a global limit 2607 * for each station. Therefore, use the minimum of all the 2608 * aggregation sessions and our default value. 2609 */ 2610 mvmsta->max_agg_bufsize = 2611 min(mvmsta->max_agg_bufsize, buf_size); 2612 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2613 2614 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2615 sta->addr, tid); 2616 2617 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2618 } 2619 2620 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2621 struct iwl_mvm_sta *mvmsta, 2622 u16 txq_id) 2623 { 2624 if (iwl_mvm_has_new_tx_api(mvm)) 2625 return; 2626 2627 spin_lock_bh(&mvm->queue_info_lock); 2628 /* 2629 * The TXQ is marked as reserved only if no traffic came through yet 2630 * This means no traffic has been sent on this TID (agg'd or not), so 2631 * we no longer have use for the queue. Since it hasn't even been 2632 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2633 * free. 2634 */ 2635 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2636 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2637 2638 spin_unlock_bh(&mvm->queue_info_lock); 2639 } 2640 2641 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2642 struct ieee80211_sta *sta, u16 tid) 2643 { 2644 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2645 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2646 u16 txq_id; 2647 int err; 2648 2649 /* 2650 * If mac80211 is cleaning its state, then say that we finished since 2651 * our state has been cleared anyway. 2652 */ 2653 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2654 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2655 return 0; 2656 } 2657 2658 spin_lock_bh(&mvmsta->lock); 2659 2660 txq_id = tid_data->txq_id; 2661 2662 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2663 mvmsta->sta_id, tid, txq_id, tid_data->state); 2664 2665 mvmsta->agg_tids &= ~BIT(tid); 2666 2667 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2668 2669 switch (tid_data->state) { 2670 case IWL_AGG_ON: 2671 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2672 2673 IWL_DEBUG_TX_QUEUES(mvm, 2674 "ssn = %d, next_recl = %d\n", 2675 tid_data->ssn, tid_data->next_reclaimed); 2676 2677 tid_data->ssn = 0xffff; 2678 tid_data->state = IWL_AGG_OFF; 2679 spin_unlock_bh(&mvmsta->lock); 2680 2681 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2682 2683 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2684 return 0; 2685 case IWL_AGG_STARTING: 2686 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2687 /* 2688 * The agg session has been stopped before it was set up. This 2689 * can happen when the AddBA timer times out for example. 2690 */ 2691 2692 /* No barriers since we are under mutex */ 2693 lockdep_assert_held(&mvm->mutex); 2694 2695 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2696 tid_data->state = IWL_AGG_OFF; 2697 err = 0; 2698 break; 2699 default: 2700 IWL_ERR(mvm, 2701 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2702 mvmsta->sta_id, tid, tid_data->state); 2703 IWL_ERR(mvm, 2704 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2705 err = -EINVAL; 2706 } 2707 2708 spin_unlock_bh(&mvmsta->lock); 2709 2710 return err; 2711 } 2712 2713 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2714 struct ieee80211_sta *sta, u16 tid) 2715 { 2716 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2717 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2718 u16 txq_id; 2719 enum iwl_mvm_agg_state old_state; 2720 2721 /* 2722 * First set the agg state to OFF to avoid calling 2723 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2724 */ 2725 spin_lock_bh(&mvmsta->lock); 2726 txq_id = tid_data->txq_id; 2727 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2728 mvmsta->sta_id, tid, txq_id, tid_data->state); 2729 old_state = tid_data->state; 2730 tid_data->state = IWL_AGG_OFF; 2731 mvmsta->agg_tids &= ~BIT(tid); 2732 spin_unlock_bh(&mvmsta->lock); 2733 2734 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2735 2736 if (old_state >= IWL_AGG_ON) { 2737 iwl_mvm_drain_sta(mvm, mvmsta, true); 2738 2739 if (iwl_mvm_has_new_tx_api(mvm)) { 2740 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2741 BIT(tid), 0)) 2742 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2743 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2744 } else { 2745 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2746 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2747 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2748 } 2749 2750 iwl_mvm_drain_sta(mvm, mvmsta, false); 2751 2752 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2753 } 2754 2755 return 0; 2756 } 2757 2758 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2759 { 2760 int i, max = -1, max_offs = -1; 2761 2762 lockdep_assert_held(&mvm->mutex); 2763 2764 /* Pick the unused key offset with the highest 'deleted' 2765 * counter. Every time a key is deleted, all the counters 2766 * are incremented and the one that was just deleted is 2767 * reset to zero. Thus, the highest counter is the one 2768 * that was deleted longest ago. Pick that one. 2769 */ 2770 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2771 if (test_bit(i, mvm->fw_key_table)) 2772 continue; 2773 if (mvm->fw_key_deleted[i] > max) { 2774 max = mvm->fw_key_deleted[i]; 2775 max_offs = i; 2776 } 2777 } 2778 2779 if (max_offs < 0) 2780 return STA_KEY_IDX_INVALID; 2781 2782 return max_offs; 2783 } 2784 2785 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2786 struct ieee80211_vif *vif, 2787 struct ieee80211_sta *sta) 2788 { 2789 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2790 2791 if (sta) 2792 return iwl_mvm_sta_from_mac80211(sta); 2793 2794 /* 2795 * The device expects GTKs for station interfaces to be 2796 * installed as GTKs for the AP station. If we have no 2797 * station ID, then use AP's station ID. 2798 */ 2799 if (vif->type == NL80211_IFTYPE_STATION && 2800 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 2801 u8 sta_id = mvmvif->ap_sta_id; 2802 2803 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2804 lockdep_is_held(&mvm->mutex)); 2805 2806 /* 2807 * It is possible that the 'sta' parameter is NULL, 2808 * for example when a GTK is removed - the sta_id will then 2809 * be the AP ID, and no station was passed by mac80211. 2810 */ 2811 if (IS_ERR_OR_NULL(sta)) 2812 return NULL; 2813 2814 return iwl_mvm_sta_from_mac80211(sta); 2815 } 2816 2817 return NULL; 2818 } 2819 2820 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2821 u32 sta_id, 2822 struct ieee80211_key_conf *key, bool mcast, 2823 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2824 u8 key_offset) 2825 { 2826 union { 2827 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2828 struct iwl_mvm_add_sta_key_cmd cmd; 2829 } u = {}; 2830 __le16 key_flags; 2831 int ret; 2832 u32 status; 2833 u16 keyidx; 2834 u64 pn = 0; 2835 int i, size; 2836 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2837 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2838 2839 if (sta_id == IWL_MVM_INVALID_STA) 2840 return -EINVAL; 2841 2842 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 2843 STA_KEY_FLG_KEYID_MSK; 2844 key_flags = cpu_to_le16(keyidx); 2845 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2846 2847 switch (key->cipher) { 2848 case WLAN_CIPHER_SUITE_TKIP: 2849 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2850 if (new_api) { 2851 memcpy((void *)&u.cmd.tx_mic_key, 2852 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 2853 IWL_MIC_KEY_SIZE); 2854 2855 memcpy((void *)&u.cmd.rx_mic_key, 2856 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 2857 IWL_MIC_KEY_SIZE); 2858 pn = atomic64_read(&key->tx_pn); 2859 2860 } else { 2861 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 2862 for (i = 0; i < 5; i++) 2863 u.cmd_v1.tkip_rx_ttak[i] = 2864 cpu_to_le16(tkip_p1k[i]); 2865 } 2866 memcpy(u.cmd.common.key, key->key, key->keylen); 2867 break; 2868 case WLAN_CIPHER_SUITE_CCMP: 2869 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2870 memcpy(u.cmd.common.key, key->key, key->keylen); 2871 if (new_api) 2872 pn = atomic64_read(&key->tx_pn); 2873 break; 2874 case WLAN_CIPHER_SUITE_WEP104: 2875 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2876 /* fall through */ 2877 case WLAN_CIPHER_SUITE_WEP40: 2878 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2879 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 2880 break; 2881 case WLAN_CIPHER_SUITE_GCMP_256: 2882 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2883 /* fall through */ 2884 case WLAN_CIPHER_SUITE_GCMP: 2885 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2886 memcpy(u.cmd.common.key, key->key, key->keylen); 2887 if (new_api) 2888 pn = atomic64_read(&key->tx_pn); 2889 break; 2890 default: 2891 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2892 memcpy(u.cmd.common.key, key->key, key->keylen); 2893 } 2894 2895 if (mcast) 2896 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2897 2898 u.cmd.common.key_offset = key_offset; 2899 u.cmd.common.key_flags = key_flags; 2900 u.cmd.common.sta_id = sta_id; 2901 2902 if (new_api) { 2903 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 2904 size = sizeof(u.cmd); 2905 } else { 2906 size = sizeof(u.cmd_v1); 2907 } 2908 2909 status = ADD_STA_SUCCESS; 2910 if (cmd_flags & CMD_ASYNC) 2911 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 2912 &u.cmd); 2913 else 2914 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 2915 &u.cmd, &status); 2916 2917 switch (status) { 2918 case ADD_STA_SUCCESS: 2919 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2920 break; 2921 default: 2922 ret = -EIO; 2923 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2924 break; 2925 } 2926 2927 return ret; 2928 } 2929 2930 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2931 struct ieee80211_key_conf *keyconf, 2932 u8 sta_id, bool remove_key) 2933 { 2934 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 2935 2936 /* verify the key details match the required command's expectations */ 2937 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 2938 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 2939 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 2940 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 2941 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 2942 return -EINVAL; 2943 2944 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 2945 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 2946 return -EINVAL; 2947 2948 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 2949 igtk_cmd.sta_id = cpu_to_le32(sta_id); 2950 2951 if (remove_key) { 2952 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 2953 } else { 2954 struct ieee80211_key_seq seq; 2955 const u8 *pn; 2956 2957 switch (keyconf->cipher) { 2958 case WLAN_CIPHER_SUITE_AES_CMAC: 2959 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 2960 break; 2961 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 2962 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 2963 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 2964 break; 2965 default: 2966 return -EINVAL; 2967 } 2968 2969 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 2970 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2971 igtk_cmd.ctrl_flags |= 2972 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 2973 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 2974 pn = seq.aes_cmac.pn; 2975 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 2976 ((u64) pn[4] << 8) | 2977 ((u64) pn[3] << 16) | 2978 ((u64) pn[2] << 24) | 2979 ((u64) pn[1] << 32) | 2980 ((u64) pn[0] << 40)); 2981 } 2982 2983 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 2984 remove_key ? "removing" : "installing", 2985 igtk_cmd.sta_id); 2986 2987 if (!iwl_mvm_has_new_rx_api(mvm)) { 2988 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 2989 .ctrl_flags = igtk_cmd.ctrl_flags, 2990 .key_id = igtk_cmd.key_id, 2991 .sta_id = igtk_cmd.sta_id, 2992 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 2993 }; 2994 2995 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 2996 ARRAY_SIZE(igtk_cmd_v1.igtk)); 2997 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 2998 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 2999 } 3000 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3001 sizeof(igtk_cmd), &igtk_cmd); 3002 } 3003 3004 3005 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3006 struct ieee80211_vif *vif, 3007 struct ieee80211_sta *sta) 3008 { 3009 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3010 3011 if (sta) 3012 return sta->addr; 3013 3014 if (vif->type == NL80211_IFTYPE_STATION && 3015 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3016 u8 sta_id = mvmvif->ap_sta_id; 3017 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3018 lockdep_is_held(&mvm->mutex)); 3019 return sta->addr; 3020 } 3021 3022 3023 return NULL; 3024 } 3025 3026 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3027 struct ieee80211_vif *vif, 3028 struct ieee80211_sta *sta, 3029 struct ieee80211_key_conf *keyconf, 3030 u8 key_offset, 3031 bool mcast) 3032 { 3033 int ret; 3034 const u8 *addr; 3035 struct ieee80211_key_seq seq; 3036 u16 p1k[5]; 3037 u32 sta_id; 3038 3039 if (sta) { 3040 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3041 3042 sta_id = mvm_sta->sta_id; 3043 } else if (vif->type == NL80211_IFTYPE_AP && 3044 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3045 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3046 3047 sta_id = mvmvif->mcast_sta.sta_id; 3048 } else { 3049 IWL_ERR(mvm, "Failed to find station id\n"); 3050 return -EINVAL; 3051 } 3052 3053 switch (keyconf->cipher) { 3054 case WLAN_CIPHER_SUITE_TKIP: 3055 if (vif->type == NL80211_IFTYPE_AP) { 3056 ret = -EINVAL; 3057 break; 3058 } 3059 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3060 /* get phase 1 key from mac80211 */ 3061 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3062 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3063 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3064 seq.tkip.iv32, p1k, 0, key_offset); 3065 break; 3066 case WLAN_CIPHER_SUITE_CCMP: 3067 case WLAN_CIPHER_SUITE_WEP40: 3068 case WLAN_CIPHER_SUITE_WEP104: 3069 case WLAN_CIPHER_SUITE_GCMP: 3070 case WLAN_CIPHER_SUITE_GCMP_256: 3071 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3072 0, NULL, 0, key_offset); 3073 break; 3074 default: 3075 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3076 0, NULL, 0, key_offset); 3077 } 3078 3079 return ret; 3080 } 3081 3082 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3083 struct ieee80211_key_conf *keyconf, 3084 bool mcast) 3085 { 3086 union { 3087 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3088 struct iwl_mvm_add_sta_key_cmd cmd; 3089 } u = {}; 3090 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3091 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3092 __le16 key_flags; 3093 int ret, size; 3094 u32 status; 3095 3096 if (sta_id == IWL_MVM_INVALID_STA) 3097 return -EINVAL; 3098 3099 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3100 STA_KEY_FLG_KEYID_MSK); 3101 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3102 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3103 3104 if (mcast) 3105 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3106 3107 /* 3108 * The fields assigned here are in the same location at the start 3109 * of the command, so we can do this union trick. 3110 */ 3111 u.cmd.common.key_flags = key_flags; 3112 u.cmd.common.key_offset = keyconf->hw_key_idx; 3113 u.cmd.common.sta_id = sta_id; 3114 3115 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3116 3117 status = ADD_STA_SUCCESS; 3118 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3119 &status); 3120 3121 switch (status) { 3122 case ADD_STA_SUCCESS: 3123 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3124 break; 3125 default: 3126 ret = -EIO; 3127 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3128 break; 3129 } 3130 3131 return ret; 3132 } 3133 3134 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3135 struct ieee80211_vif *vif, 3136 struct ieee80211_sta *sta, 3137 struct ieee80211_key_conf *keyconf, 3138 u8 key_offset) 3139 { 3140 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3141 struct iwl_mvm_sta *mvm_sta; 3142 u8 sta_id = IWL_MVM_INVALID_STA; 3143 int ret; 3144 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3145 3146 lockdep_assert_held(&mvm->mutex); 3147 3148 if (vif->type != NL80211_IFTYPE_AP || 3149 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3150 /* Get the station id from the mvm local station table */ 3151 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3152 if (!mvm_sta) { 3153 IWL_ERR(mvm, "Failed to find station\n"); 3154 return -EINVAL; 3155 } 3156 sta_id = mvm_sta->sta_id; 3157 3158 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3159 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3160 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3161 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, 3162 false); 3163 goto end; 3164 } 3165 3166 /* 3167 * It is possible that the 'sta' parameter is NULL, and thus 3168 * there is a need to retrieve the sta from the local station 3169 * table. 3170 */ 3171 if (!sta) { 3172 sta = rcu_dereference_protected( 3173 mvm->fw_id_to_mac_id[sta_id], 3174 lockdep_is_held(&mvm->mutex)); 3175 if (IS_ERR_OR_NULL(sta)) { 3176 IWL_ERR(mvm, "Invalid station id\n"); 3177 return -EINVAL; 3178 } 3179 } 3180 3181 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3182 return -EINVAL; 3183 } 3184 3185 /* If the key_offset is not pre-assigned, we need to find a 3186 * new offset to use. In normal cases, the offset is not 3187 * pre-assigned, but during HW_RESTART we want to reuse the 3188 * same indices, so we pass them when this function is called. 3189 * 3190 * In D3 entry, we need to hardcoded the indices (because the 3191 * firmware hardcodes the PTK offset to 0). In this case, we 3192 * need to make sure we don't overwrite the hw_key_idx in the 3193 * keyconf structure, because otherwise we cannot configure 3194 * the original ones back when resuming. 3195 */ 3196 if (key_offset == STA_KEY_IDX_INVALID) { 3197 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3198 if (key_offset == STA_KEY_IDX_INVALID) 3199 return -ENOSPC; 3200 keyconf->hw_key_idx = key_offset; 3201 } 3202 3203 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3204 if (ret) 3205 goto end; 3206 3207 /* 3208 * For WEP, the same key is used for multicast and unicast. Upload it 3209 * again, using the same key offset, and now pointing the other one 3210 * to the same key slot (offset). 3211 * If this fails, remove the original as well. 3212 */ 3213 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3214 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3215 sta) { 3216 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3217 key_offset, !mcast); 3218 if (ret) { 3219 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3220 goto end; 3221 } 3222 } 3223 3224 __set_bit(key_offset, mvm->fw_key_table); 3225 3226 end: 3227 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3228 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3229 sta ? sta->addr : zero_addr, ret); 3230 return ret; 3231 } 3232 3233 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3234 struct ieee80211_vif *vif, 3235 struct ieee80211_sta *sta, 3236 struct ieee80211_key_conf *keyconf) 3237 { 3238 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3239 struct iwl_mvm_sta *mvm_sta; 3240 u8 sta_id = IWL_MVM_INVALID_STA; 3241 int ret, i; 3242 3243 lockdep_assert_held(&mvm->mutex); 3244 3245 /* Get the station from the mvm local station table */ 3246 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3247 if (mvm_sta) 3248 sta_id = mvm_sta->sta_id; 3249 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3250 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3251 3252 3253 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3254 keyconf->keyidx, sta_id); 3255 3256 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3257 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3258 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3259 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3260 3261 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3262 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3263 keyconf->hw_key_idx); 3264 return -ENOENT; 3265 } 3266 3267 /* track which key was deleted last */ 3268 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3269 if (mvm->fw_key_deleted[i] < U8_MAX) 3270 mvm->fw_key_deleted[i]++; 3271 } 3272 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3273 3274 if (sta && !mvm_sta) { 3275 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3276 return 0; 3277 } 3278 3279 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3280 if (ret) 3281 return ret; 3282 3283 /* delete WEP key twice to get rid of (now useless) offset */ 3284 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3285 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3286 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3287 3288 return ret; 3289 } 3290 3291 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3292 struct ieee80211_vif *vif, 3293 struct ieee80211_key_conf *keyconf, 3294 struct ieee80211_sta *sta, u32 iv32, 3295 u16 *phase1key) 3296 { 3297 struct iwl_mvm_sta *mvm_sta; 3298 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3299 3300 rcu_read_lock(); 3301 3302 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3303 if (WARN_ON_ONCE(!mvm_sta)) 3304 goto unlock; 3305 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3306 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3307 3308 unlock: 3309 rcu_read_unlock(); 3310 } 3311 3312 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3313 struct ieee80211_sta *sta) 3314 { 3315 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3316 struct iwl_mvm_add_sta_cmd cmd = { 3317 .add_modify = STA_MODE_MODIFY, 3318 .sta_id = mvmsta->sta_id, 3319 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3320 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3321 }; 3322 int ret; 3323 3324 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3325 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3326 if (ret) 3327 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3328 } 3329 3330 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3331 struct ieee80211_sta *sta, 3332 enum ieee80211_frame_release_type reason, 3333 u16 cnt, u16 tids, bool more_data, 3334 bool single_sta_queue) 3335 { 3336 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3337 struct iwl_mvm_add_sta_cmd cmd = { 3338 .add_modify = STA_MODE_MODIFY, 3339 .sta_id = mvmsta->sta_id, 3340 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3341 .sleep_tx_count = cpu_to_le16(cnt), 3342 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3343 }; 3344 int tid, ret; 3345 unsigned long _tids = tids; 3346 3347 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3348 * Note that this field is reserved and unused by firmware not 3349 * supporting GO uAPSD, so it's safe to always do this. 3350 */ 3351 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3352 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3353 3354 /* If we're releasing frames from aggregation or dqa queues then check 3355 * if all the queues that we're releasing frames from, combined, have: 3356 * - more frames than the service period, in which case more_data 3357 * needs to be set 3358 * - fewer than 'cnt' frames, in which case we need to adjust the 3359 * firmware command (but do that unconditionally) 3360 */ 3361 if (single_sta_queue) { 3362 int remaining = cnt; 3363 int sleep_tx_count; 3364 3365 spin_lock_bh(&mvmsta->lock); 3366 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3367 struct iwl_mvm_tid_data *tid_data; 3368 u16 n_queued; 3369 3370 tid_data = &mvmsta->tid_data[tid]; 3371 3372 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3373 if (n_queued > remaining) { 3374 more_data = true; 3375 remaining = 0; 3376 break; 3377 } 3378 remaining -= n_queued; 3379 } 3380 sleep_tx_count = cnt - remaining; 3381 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3382 mvmsta->sleep_tx_count = sleep_tx_count; 3383 spin_unlock_bh(&mvmsta->lock); 3384 3385 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3386 if (WARN_ON(cnt - remaining == 0)) { 3387 ieee80211_sta_eosp(sta); 3388 return; 3389 } 3390 } 3391 3392 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3393 if (more_data) 3394 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3395 3396 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3397 mvmsta->next_status_eosp = true; 3398 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3399 } else { 3400 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3401 } 3402 3403 /* block the Tx queues until the FW updated the sleep Tx count */ 3404 iwl_trans_block_txq_ptrs(mvm->trans, true); 3405 3406 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3407 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3408 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3409 if (ret) 3410 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3411 } 3412 3413 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3414 struct iwl_rx_cmd_buffer *rxb) 3415 { 3416 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3417 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3418 struct ieee80211_sta *sta; 3419 u32 sta_id = le32_to_cpu(notif->sta_id); 3420 3421 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3422 return; 3423 3424 rcu_read_lock(); 3425 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3426 if (!IS_ERR_OR_NULL(sta)) 3427 ieee80211_sta_eosp(sta); 3428 rcu_read_unlock(); 3429 } 3430 3431 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3432 struct iwl_mvm_sta *mvmsta, bool disable) 3433 { 3434 struct iwl_mvm_add_sta_cmd cmd = { 3435 .add_modify = STA_MODE_MODIFY, 3436 .sta_id = mvmsta->sta_id, 3437 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3438 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3439 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3440 }; 3441 int ret; 3442 3443 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3444 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3445 if (ret) 3446 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3447 } 3448 3449 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3450 struct ieee80211_sta *sta, 3451 bool disable) 3452 { 3453 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3454 3455 spin_lock_bh(&mvm_sta->lock); 3456 3457 if (mvm_sta->disable_tx == disable) { 3458 spin_unlock_bh(&mvm_sta->lock); 3459 return; 3460 } 3461 3462 mvm_sta->disable_tx = disable; 3463 3464 /* Tell mac80211 to start/stop queuing tx for this station */ 3465 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3466 3467 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3468 3469 spin_unlock_bh(&mvm_sta->lock); 3470 } 3471 3472 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3473 struct iwl_mvm_vif *mvmvif, 3474 struct iwl_mvm_int_sta *sta, 3475 bool disable) 3476 { 3477 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3478 struct iwl_mvm_add_sta_cmd cmd = { 3479 .add_modify = STA_MODE_MODIFY, 3480 .sta_id = sta->sta_id, 3481 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3482 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3483 .mac_id_n_color = cpu_to_le32(id), 3484 }; 3485 int ret; 3486 3487 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3488 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3489 if (ret) 3490 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3491 } 3492 3493 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3494 struct iwl_mvm_vif *mvmvif, 3495 bool disable) 3496 { 3497 struct ieee80211_sta *sta; 3498 struct iwl_mvm_sta *mvm_sta; 3499 int i; 3500 3501 lockdep_assert_held(&mvm->mutex); 3502 3503 /* Block/unblock all the stations of the given mvmvif */ 3504 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3505 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3506 lockdep_is_held(&mvm->mutex)); 3507 if (IS_ERR_OR_NULL(sta)) 3508 continue; 3509 3510 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3511 if (mvm_sta->mac_id_n_color != 3512 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3513 continue; 3514 3515 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3516 } 3517 3518 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3519 return; 3520 3521 /* Need to block/unblock also multicast station */ 3522 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3523 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3524 &mvmvif->mcast_sta, disable); 3525 3526 /* 3527 * Only unblock the broadcast station (FW blocks it for immediate 3528 * quiet, not the driver) 3529 */ 3530 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3531 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3532 &mvmvif->bcast_sta, disable); 3533 } 3534 3535 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3536 { 3537 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3538 struct iwl_mvm_sta *mvmsta; 3539 3540 rcu_read_lock(); 3541 3542 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3543 3544 if (!WARN_ON(!mvmsta)) 3545 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3546 3547 rcu_read_unlock(); 3548 } 3549 3550 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3551 { 3552 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3553 3554 /* 3555 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 3556 * to align the wrap around of ssn so we compare relevant values. 3557 */ 3558 if (mvm->trans->cfg->gen2) 3559 sn &= 0xff; 3560 3561 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3562 } 3563