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 struct iwl_mvm_reorder_buf_entry *entries = 2108 &data->entries[i * data->entries_per_queue]; 2109 2110 spin_lock_bh(&reorder_buf->lock); 2111 if (likely(!reorder_buf->num_stored)) { 2112 spin_unlock_bh(&reorder_buf->lock); 2113 continue; 2114 } 2115 2116 /* 2117 * This shouldn't happen in regular DELBA since the internal 2118 * delBA notification should trigger a release of all frames in 2119 * the reorder buffer. 2120 */ 2121 WARN_ON(1); 2122 2123 for (j = 0; j < reorder_buf->buf_size; j++) 2124 __skb_queue_purge(&entries[j].e.frames); 2125 /* 2126 * Prevent timer re-arm. This prevents a very far fetched case 2127 * where we timed out on the notification. There may be prior 2128 * RX frames pending in the RX queue before the notification 2129 * that might get processed between now and the actual deletion 2130 * and we would re-arm the timer although we are deleting the 2131 * reorder buffer. 2132 */ 2133 reorder_buf->removed = true; 2134 spin_unlock_bh(&reorder_buf->lock); 2135 del_timer_sync(&reorder_buf->reorder_timer); 2136 } 2137 } 2138 2139 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2140 struct iwl_mvm_baid_data *data, 2141 u16 ssn, u8 buf_size) 2142 { 2143 int i; 2144 2145 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2146 struct iwl_mvm_reorder_buffer *reorder_buf = 2147 &data->reorder_buf[i]; 2148 struct iwl_mvm_reorder_buf_entry *entries = 2149 &data->entries[i * data->entries_per_queue]; 2150 int j; 2151 2152 reorder_buf->num_stored = 0; 2153 reorder_buf->head_sn = ssn; 2154 reorder_buf->buf_size = buf_size; 2155 /* rx reorder timer */ 2156 reorder_buf->reorder_timer.function = 2157 iwl_mvm_reorder_timer_expired; 2158 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 2159 init_timer(&reorder_buf->reorder_timer); 2160 spin_lock_init(&reorder_buf->lock); 2161 reorder_buf->mvm = mvm; 2162 reorder_buf->queue = i; 2163 reorder_buf->valid = false; 2164 for (j = 0; j < reorder_buf->buf_size; j++) 2165 __skb_queue_head_init(&entries[j].e.frames); 2166 } 2167 } 2168 2169 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2170 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2171 { 2172 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2173 struct iwl_mvm_add_sta_cmd cmd = {}; 2174 struct iwl_mvm_baid_data *baid_data = NULL; 2175 int ret; 2176 u32 status; 2177 2178 lockdep_assert_held(&mvm->mutex); 2179 2180 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2181 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2182 return -ENOSPC; 2183 } 2184 2185 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2186 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); 2187 2188 /* sparse doesn't like the __align() so don't check */ 2189 #ifndef __CHECKER__ 2190 /* 2191 * The division below will be OK if either the cache line size 2192 * can be divided by the entry size (ALIGN will round up) or if 2193 * if the entry size can be divided by the cache line size, in 2194 * which case the ALIGN() will do nothing. 2195 */ 2196 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) && 2197 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES); 2198 #endif 2199 2200 /* 2201 * Upward align the reorder buffer size to fill an entire cache 2202 * line for each queue, to avoid sharing cache lines between 2203 * different queues. 2204 */ 2205 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES); 2206 2207 /* 2208 * Allocate here so if allocation fails we can bail out early 2209 * before starting the BA session in the firmware 2210 */ 2211 baid_data = kzalloc(sizeof(*baid_data) + 2212 mvm->trans->num_rx_queues * 2213 reorder_buf_size, 2214 GFP_KERNEL); 2215 if (!baid_data) 2216 return -ENOMEM; 2217 2218 /* 2219 * This division is why we need the above BUILD_BUG_ON(), 2220 * if that doesn't hold then this will not be right. 2221 */ 2222 baid_data->entries_per_queue = 2223 reorder_buf_size / sizeof(baid_data->entries[0]); 2224 } 2225 2226 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2227 cmd.sta_id = mvm_sta->sta_id; 2228 cmd.add_modify = STA_MODE_MODIFY; 2229 if (start) { 2230 cmd.add_immediate_ba_tid = (u8) tid; 2231 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2232 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2233 } else { 2234 cmd.remove_immediate_ba_tid = (u8) tid; 2235 } 2236 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2237 STA_MODIFY_REMOVE_BA_TID; 2238 2239 status = ADD_STA_SUCCESS; 2240 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2241 iwl_mvm_add_sta_cmd_size(mvm), 2242 &cmd, &status); 2243 if (ret) 2244 goto out_free; 2245 2246 switch (status & IWL_ADD_STA_STATUS_MASK) { 2247 case ADD_STA_SUCCESS: 2248 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2249 start ? "start" : "stopp"); 2250 break; 2251 case ADD_STA_IMMEDIATE_BA_FAILURE: 2252 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2253 ret = -ENOSPC; 2254 break; 2255 default: 2256 ret = -EIO; 2257 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2258 start ? "start" : "stopp", status); 2259 break; 2260 } 2261 2262 if (ret) 2263 goto out_free; 2264 2265 if (start) { 2266 u8 baid; 2267 2268 mvm->rx_ba_sessions++; 2269 2270 if (!iwl_mvm_has_new_rx_api(mvm)) 2271 return 0; 2272 2273 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2274 ret = -EINVAL; 2275 goto out_free; 2276 } 2277 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2278 IWL_ADD_STA_BAID_SHIFT); 2279 baid_data->baid = baid; 2280 baid_data->timeout = timeout; 2281 baid_data->last_rx = jiffies; 2282 setup_timer(&baid_data->session_timer, 2283 iwl_mvm_rx_agg_session_expired, 2284 (unsigned long)&mvm->baid_map[baid]); 2285 baid_data->mvm = mvm; 2286 baid_data->tid = tid; 2287 baid_data->sta_id = mvm_sta->sta_id; 2288 2289 mvm_sta->tid_to_baid[tid] = baid; 2290 if (timeout) 2291 mod_timer(&baid_data->session_timer, 2292 TU_TO_EXP_TIME(timeout * 2)); 2293 2294 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size); 2295 /* 2296 * protect the BA data with RCU to cover a case where our 2297 * internal RX sync mechanism will timeout (not that it's 2298 * supposed to happen) and we will free the session data while 2299 * RX is being processed in parallel 2300 */ 2301 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2302 mvm_sta->sta_id, tid, baid); 2303 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2304 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2305 } else { 2306 u8 baid = mvm_sta->tid_to_baid[tid]; 2307 2308 if (mvm->rx_ba_sessions > 0) 2309 /* check that restart flow didn't zero the counter */ 2310 mvm->rx_ba_sessions--; 2311 if (!iwl_mvm_has_new_rx_api(mvm)) 2312 return 0; 2313 2314 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2315 return -EINVAL; 2316 2317 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2318 if (WARN_ON(!baid_data)) 2319 return -EINVAL; 2320 2321 /* synchronize all rx queues so we can safely delete */ 2322 iwl_mvm_free_reorder(mvm, baid_data); 2323 del_timer_sync(&baid_data->session_timer); 2324 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2325 kfree_rcu(baid_data, rcu_head); 2326 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2327 } 2328 return 0; 2329 2330 out_free: 2331 kfree(baid_data); 2332 return ret; 2333 } 2334 2335 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2336 int tid, u8 queue, bool start) 2337 { 2338 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2339 struct iwl_mvm_add_sta_cmd cmd = {}; 2340 int ret; 2341 u32 status; 2342 2343 lockdep_assert_held(&mvm->mutex); 2344 2345 if (start) { 2346 mvm_sta->tfd_queue_msk |= BIT(queue); 2347 mvm_sta->tid_disable_agg &= ~BIT(tid); 2348 } else { 2349 /* In DQA-mode the queue isn't removed on agg termination */ 2350 mvm_sta->tid_disable_agg |= BIT(tid); 2351 } 2352 2353 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2354 cmd.sta_id = mvm_sta->sta_id; 2355 cmd.add_modify = STA_MODE_MODIFY; 2356 if (!iwl_mvm_has_new_tx_api(mvm)) 2357 cmd.modify_mask = STA_MODIFY_QUEUES; 2358 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2359 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2360 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2361 2362 status = ADD_STA_SUCCESS; 2363 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2364 iwl_mvm_add_sta_cmd_size(mvm), 2365 &cmd, &status); 2366 if (ret) 2367 return ret; 2368 2369 switch (status & IWL_ADD_STA_STATUS_MASK) { 2370 case ADD_STA_SUCCESS: 2371 break; 2372 default: 2373 ret = -EIO; 2374 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2375 start ? "start" : "stopp", status); 2376 break; 2377 } 2378 2379 return ret; 2380 } 2381 2382 const u8 tid_to_mac80211_ac[] = { 2383 IEEE80211_AC_BE, 2384 IEEE80211_AC_BK, 2385 IEEE80211_AC_BK, 2386 IEEE80211_AC_BE, 2387 IEEE80211_AC_VI, 2388 IEEE80211_AC_VI, 2389 IEEE80211_AC_VO, 2390 IEEE80211_AC_VO, 2391 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2392 }; 2393 2394 static const u8 tid_to_ucode_ac[] = { 2395 AC_BE, 2396 AC_BK, 2397 AC_BK, 2398 AC_BE, 2399 AC_VI, 2400 AC_VI, 2401 AC_VO, 2402 AC_VO, 2403 }; 2404 2405 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2406 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2407 { 2408 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2409 struct iwl_mvm_tid_data *tid_data; 2410 u16 normalized_ssn; 2411 int txq_id; 2412 int ret; 2413 2414 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2415 return -EINVAL; 2416 2417 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED && 2418 mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2419 IWL_ERR(mvm, 2420 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n", 2421 mvmsta->tid_data[tid].state); 2422 return -ENXIO; 2423 } 2424 2425 lockdep_assert_held(&mvm->mutex); 2426 2427 spin_lock_bh(&mvmsta->lock); 2428 2429 /* possible race condition - we entered D0i3 while starting agg */ 2430 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2431 spin_unlock_bh(&mvmsta->lock); 2432 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2433 return -EIO; 2434 } 2435 2436 spin_lock(&mvm->queue_info_lock); 2437 2438 /* 2439 * Note the possible cases: 2440 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2441 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2442 * one and mark it as reserved 2443 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2444 * non-DQA mode, since the TXQ hasn't yet been allocated 2445 * Don't support case 3 for new TX path as it is not expected to happen 2446 * and aggregation will be offloaded soon anyway 2447 */ 2448 txq_id = mvmsta->tid_data[tid].txq_id; 2449 if (iwl_mvm_has_new_tx_api(mvm)) { 2450 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2451 ret = -ENXIO; 2452 goto release_locks; 2453 } 2454 } else if (unlikely(mvm->queue_info[txq_id].status == 2455 IWL_MVM_QUEUE_SHARED)) { 2456 ret = -ENXIO; 2457 IWL_DEBUG_TX_QUEUES(mvm, 2458 "Can't start tid %d agg on shared queue!\n", 2459 tid); 2460 goto release_locks; 2461 } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2462 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2463 IWL_MVM_DQA_MIN_DATA_QUEUE, 2464 IWL_MVM_DQA_MAX_DATA_QUEUE); 2465 if (txq_id < 0) { 2466 ret = txq_id; 2467 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2468 goto release_locks; 2469 } 2470 /* 2471 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2472 * an inactive queue from iwl_mvm_find_free_queue() is 2473 * certainly a bug 2474 */ 2475 WARN_ON(mvm->queue_info[txq_id].status == 2476 IWL_MVM_QUEUE_INACTIVE); 2477 2478 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2479 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2480 } 2481 2482 spin_unlock(&mvm->queue_info_lock); 2483 2484 IWL_DEBUG_TX_QUEUES(mvm, 2485 "AGG for tid %d will be on queue #%d\n", 2486 tid, txq_id); 2487 2488 tid_data = &mvmsta->tid_data[tid]; 2489 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2490 tid_data->txq_id = txq_id; 2491 *ssn = tid_data->ssn; 2492 2493 IWL_DEBUG_TX_QUEUES(mvm, 2494 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2495 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2496 tid_data->next_reclaimed); 2497 2498 /* 2499 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 2500 * to align the wrap around of ssn so we compare relevant values. 2501 */ 2502 normalized_ssn = tid_data->ssn; 2503 if (mvm->trans->cfg->gen2) 2504 normalized_ssn &= 0xff; 2505 2506 if (normalized_ssn == tid_data->next_reclaimed) { 2507 tid_data->state = IWL_AGG_STARTING; 2508 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2509 } else { 2510 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2511 } 2512 2513 ret = 0; 2514 goto out; 2515 2516 release_locks: 2517 spin_unlock(&mvm->queue_info_lock); 2518 out: 2519 spin_unlock_bh(&mvmsta->lock); 2520 2521 return ret; 2522 } 2523 2524 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2525 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2526 bool amsdu) 2527 { 2528 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2529 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2530 unsigned int wdg_timeout = 2531 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2532 int queue, ret; 2533 bool alloc_queue = true; 2534 enum iwl_mvm_queue_status queue_status; 2535 u16 ssn; 2536 2537 struct iwl_trans_txq_scd_cfg cfg = { 2538 .sta_id = mvmsta->sta_id, 2539 .tid = tid, 2540 .frame_limit = buf_size, 2541 .aggregate = true, 2542 }; 2543 2544 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2545 != IWL_MAX_TID_COUNT); 2546 2547 if (!mvm->trans->cfg->gen2) 2548 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2549 else 2550 buf_size = min_t(int, buf_size, 2551 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF); 2552 2553 spin_lock_bh(&mvmsta->lock); 2554 ssn = tid_data->ssn; 2555 queue = tid_data->txq_id; 2556 tid_data->state = IWL_AGG_ON; 2557 mvmsta->agg_tids |= BIT(tid); 2558 tid_data->ssn = 0xffff; 2559 tid_data->amsdu_in_ampdu_allowed = amsdu; 2560 spin_unlock_bh(&mvmsta->lock); 2561 2562 if (iwl_mvm_has_new_tx_api(mvm)) { 2563 /* 2564 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so 2565 * no need to check queue's status 2566 */ 2567 if (buf_size < mvmsta->max_agg_bufsize) 2568 return -ENOTSUPP; 2569 2570 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2571 if (ret) 2572 return -EIO; 2573 goto out; 2574 } 2575 2576 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2577 2578 spin_lock_bh(&mvm->queue_info_lock); 2579 queue_status = mvm->queue_info[queue].status; 2580 spin_unlock_bh(&mvm->queue_info_lock); 2581 2582 /* Maybe there is no need to even alloc a queue... */ 2583 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2584 alloc_queue = false; 2585 2586 /* 2587 * Only reconfig the SCD for the queue if the window size has 2588 * changed from current (become smaller) 2589 */ 2590 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2591 /* 2592 * If reconfiguring an existing queue, it first must be 2593 * drained 2594 */ 2595 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2596 BIT(queue)); 2597 if (ret) { 2598 IWL_ERR(mvm, 2599 "Error draining queue before reconfig\n"); 2600 return ret; 2601 } 2602 2603 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2604 mvmsta->sta_id, tid, 2605 buf_size, ssn); 2606 if (ret) { 2607 IWL_ERR(mvm, 2608 "Error reconfiguring TXQ #%d\n", queue); 2609 return ret; 2610 } 2611 } 2612 2613 if (alloc_queue) 2614 iwl_mvm_enable_txq(mvm, queue, 2615 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2616 &cfg, wdg_timeout); 2617 2618 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2619 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2620 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2621 if (ret) 2622 return -EIO; 2623 } 2624 2625 /* No need to mark as reserved */ 2626 spin_lock_bh(&mvm->queue_info_lock); 2627 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2628 spin_unlock_bh(&mvm->queue_info_lock); 2629 2630 out: 2631 /* 2632 * Even though in theory the peer could have different 2633 * aggregation reorder buffer sizes for different sessions, 2634 * our ucode doesn't allow for that and has a global limit 2635 * for each station. Therefore, use the minimum of all the 2636 * aggregation sessions and our default value. 2637 */ 2638 mvmsta->max_agg_bufsize = 2639 min(mvmsta->max_agg_bufsize, buf_size); 2640 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2641 2642 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2643 sta->addr, tid); 2644 2645 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2646 } 2647 2648 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2649 struct iwl_mvm_sta *mvmsta, 2650 u16 txq_id) 2651 { 2652 if (iwl_mvm_has_new_tx_api(mvm)) 2653 return; 2654 2655 spin_lock_bh(&mvm->queue_info_lock); 2656 /* 2657 * The TXQ is marked as reserved only if no traffic came through yet 2658 * This means no traffic has been sent on this TID (agg'd or not), so 2659 * we no longer have use for the queue. Since it hasn't even been 2660 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2661 * free. 2662 */ 2663 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2664 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2665 2666 spin_unlock_bh(&mvm->queue_info_lock); 2667 } 2668 2669 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2670 struct ieee80211_sta *sta, u16 tid) 2671 { 2672 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2673 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2674 u16 txq_id; 2675 int err; 2676 2677 /* 2678 * If mac80211 is cleaning its state, then say that we finished since 2679 * our state has been cleared anyway. 2680 */ 2681 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2682 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2683 return 0; 2684 } 2685 2686 spin_lock_bh(&mvmsta->lock); 2687 2688 txq_id = tid_data->txq_id; 2689 2690 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2691 mvmsta->sta_id, tid, txq_id, tid_data->state); 2692 2693 mvmsta->agg_tids &= ~BIT(tid); 2694 2695 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2696 2697 switch (tid_data->state) { 2698 case IWL_AGG_ON: 2699 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2700 2701 IWL_DEBUG_TX_QUEUES(mvm, 2702 "ssn = %d, next_recl = %d\n", 2703 tid_data->ssn, tid_data->next_reclaimed); 2704 2705 tid_data->ssn = 0xffff; 2706 tid_data->state = IWL_AGG_OFF; 2707 spin_unlock_bh(&mvmsta->lock); 2708 2709 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2710 2711 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2712 return 0; 2713 case IWL_AGG_STARTING: 2714 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2715 /* 2716 * The agg session has been stopped before it was set up. This 2717 * can happen when the AddBA timer times out for example. 2718 */ 2719 2720 /* No barriers since we are under mutex */ 2721 lockdep_assert_held(&mvm->mutex); 2722 2723 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2724 tid_data->state = IWL_AGG_OFF; 2725 err = 0; 2726 break; 2727 default: 2728 IWL_ERR(mvm, 2729 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2730 mvmsta->sta_id, tid, tid_data->state); 2731 IWL_ERR(mvm, 2732 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2733 err = -EINVAL; 2734 } 2735 2736 spin_unlock_bh(&mvmsta->lock); 2737 2738 return err; 2739 } 2740 2741 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2742 struct ieee80211_sta *sta, u16 tid) 2743 { 2744 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2745 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2746 u16 txq_id; 2747 enum iwl_mvm_agg_state old_state; 2748 2749 /* 2750 * First set the agg state to OFF to avoid calling 2751 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2752 */ 2753 spin_lock_bh(&mvmsta->lock); 2754 txq_id = tid_data->txq_id; 2755 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2756 mvmsta->sta_id, tid, txq_id, tid_data->state); 2757 old_state = tid_data->state; 2758 tid_data->state = IWL_AGG_OFF; 2759 mvmsta->agg_tids &= ~BIT(tid); 2760 spin_unlock_bh(&mvmsta->lock); 2761 2762 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2763 2764 if (old_state >= IWL_AGG_ON) { 2765 iwl_mvm_drain_sta(mvm, mvmsta, true); 2766 2767 if (iwl_mvm_has_new_tx_api(mvm)) { 2768 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2769 BIT(tid), 0)) 2770 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2771 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2772 } else { 2773 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2774 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2775 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2776 } 2777 2778 iwl_mvm_drain_sta(mvm, mvmsta, false); 2779 2780 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2781 } 2782 2783 return 0; 2784 } 2785 2786 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2787 { 2788 int i, max = -1, max_offs = -1; 2789 2790 lockdep_assert_held(&mvm->mutex); 2791 2792 /* Pick the unused key offset with the highest 'deleted' 2793 * counter. Every time a key is deleted, all the counters 2794 * are incremented and the one that was just deleted is 2795 * reset to zero. Thus, the highest counter is the one 2796 * that was deleted longest ago. Pick that one. 2797 */ 2798 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2799 if (test_bit(i, mvm->fw_key_table)) 2800 continue; 2801 if (mvm->fw_key_deleted[i] > max) { 2802 max = mvm->fw_key_deleted[i]; 2803 max_offs = i; 2804 } 2805 } 2806 2807 if (max_offs < 0) 2808 return STA_KEY_IDX_INVALID; 2809 2810 return max_offs; 2811 } 2812 2813 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 2814 struct ieee80211_vif *vif, 2815 struct ieee80211_sta *sta) 2816 { 2817 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2818 2819 if (sta) 2820 return iwl_mvm_sta_from_mac80211(sta); 2821 2822 /* 2823 * The device expects GTKs for station interfaces to be 2824 * installed as GTKs for the AP station. If we have no 2825 * station ID, then use AP's station ID. 2826 */ 2827 if (vif->type == NL80211_IFTYPE_STATION && 2828 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 2829 u8 sta_id = mvmvif->ap_sta_id; 2830 2831 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 2832 lockdep_is_held(&mvm->mutex)); 2833 2834 /* 2835 * It is possible that the 'sta' parameter is NULL, 2836 * for example when a GTK is removed - the sta_id will then 2837 * be the AP ID, and no station was passed by mac80211. 2838 */ 2839 if (IS_ERR_OR_NULL(sta)) 2840 return NULL; 2841 2842 return iwl_mvm_sta_from_mac80211(sta); 2843 } 2844 2845 return NULL; 2846 } 2847 2848 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 2849 u32 sta_id, 2850 struct ieee80211_key_conf *key, bool mcast, 2851 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 2852 u8 key_offset) 2853 { 2854 union { 2855 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 2856 struct iwl_mvm_add_sta_key_cmd cmd; 2857 } u = {}; 2858 __le16 key_flags; 2859 int ret; 2860 u32 status; 2861 u16 keyidx; 2862 u64 pn = 0; 2863 int i, size; 2864 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 2865 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 2866 2867 if (sta_id == IWL_MVM_INVALID_STA) 2868 return -EINVAL; 2869 2870 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 2871 STA_KEY_FLG_KEYID_MSK; 2872 key_flags = cpu_to_le16(keyidx); 2873 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 2874 2875 switch (key->cipher) { 2876 case WLAN_CIPHER_SUITE_TKIP: 2877 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 2878 if (new_api) { 2879 memcpy((void *)&u.cmd.tx_mic_key, 2880 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 2881 IWL_MIC_KEY_SIZE); 2882 2883 memcpy((void *)&u.cmd.rx_mic_key, 2884 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 2885 IWL_MIC_KEY_SIZE); 2886 pn = atomic64_read(&key->tx_pn); 2887 2888 } else { 2889 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 2890 for (i = 0; i < 5; i++) 2891 u.cmd_v1.tkip_rx_ttak[i] = 2892 cpu_to_le16(tkip_p1k[i]); 2893 } 2894 memcpy(u.cmd.common.key, key->key, key->keylen); 2895 break; 2896 case WLAN_CIPHER_SUITE_CCMP: 2897 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 2898 memcpy(u.cmd.common.key, key->key, key->keylen); 2899 if (new_api) 2900 pn = atomic64_read(&key->tx_pn); 2901 break; 2902 case WLAN_CIPHER_SUITE_WEP104: 2903 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 2904 /* fall through */ 2905 case WLAN_CIPHER_SUITE_WEP40: 2906 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 2907 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 2908 break; 2909 case WLAN_CIPHER_SUITE_GCMP_256: 2910 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 2911 /* fall through */ 2912 case WLAN_CIPHER_SUITE_GCMP: 2913 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 2914 memcpy(u.cmd.common.key, key->key, key->keylen); 2915 if (new_api) 2916 pn = atomic64_read(&key->tx_pn); 2917 break; 2918 default: 2919 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 2920 memcpy(u.cmd.common.key, key->key, key->keylen); 2921 } 2922 2923 if (mcast) 2924 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 2925 2926 u.cmd.common.key_offset = key_offset; 2927 u.cmd.common.key_flags = key_flags; 2928 u.cmd.common.sta_id = sta_id; 2929 2930 if (new_api) { 2931 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 2932 size = sizeof(u.cmd); 2933 } else { 2934 size = sizeof(u.cmd_v1); 2935 } 2936 2937 status = ADD_STA_SUCCESS; 2938 if (cmd_flags & CMD_ASYNC) 2939 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 2940 &u.cmd); 2941 else 2942 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 2943 &u.cmd, &status); 2944 2945 switch (status) { 2946 case ADD_STA_SUCCESS: 2947 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 2948 break; 2949 default: 2950 ret = -EIO; 2951 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 2952 break; 2953 } 2954 2955 return ret; 2956 } 2957 2958 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 2959 struct ieee80211_key_conf *keyconf, 2960 u8 sta_id, bool remove_key) 2961 { 2962 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 2963 2964 /* verify the key details match the required command's expectations */ 2965 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 2966 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 2967 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 2968 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 2969 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 2970 return -EINVAL; 2971 2972 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 2973 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 2974 return -EINVAL; 2975 2976 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 2977 igtk_cmd.sta_id = cpu_to_le32(sta_id); 2978 2979 if (remove_key) { 2980 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 2981 } else { 2982 struct ieee80211_key_seq seq; 2983 const u8 *pn; 2984 2985 switch (keyconf->cipher) { 2986 case WLAN_CIPHER_SUITE_AES_CMAC: 2987 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 2988 break; 2989 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 2990 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 2991 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 2992 break; 2993 default: 2994 return -EINVAL; 2995 } 2996 2997 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 2998 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2999 igtk_cmd.ctrl_flags |= 3000 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3001 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3002 pn = seq.aes_cmac.pn; 3003 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3004 ((u64) pn[4] << 8) | 3005 ((u64) pn[3] << 16) | 3006 ((u64) pn[2] << 24) | 3007 ((u64) pn[1] << 32) | 3008 ((u64) pn[0] << 40)); 3009 } 3010 3011 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3012 remove_key ? "removing" : "installing", 3013 igtk_cmd.sta_id); 3014 3015 if (!iwl_mvm_has_new_rx_api(mvm)) { 3016 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3017 .ctrl_flags = igtk_cmd.ctrl_flags, 3018 .key_id = igtk_cmd.key_id, 3019 .sta_id = igtk_cmd.sta_id, 3020 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3021 }; 3022 3023 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3024 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3025 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3026 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3027 } 3028 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3029 sizeof(igtk_cmd), &igtk_cmd); 3030 } 3031 3032 3033 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3034 struct ieee80211_vif *vif, 3035 struct ieee80211_sta *sta) 3036 { 3037 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3038 3039 if (sta) 3040 return sta->addr; 3041 3042 if (vif->type == NL80211_IFTYPE_STATION && 3043 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3044 u8 sta_id = mvmvif->ap_sta_id; 3045 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3046 lockdep_is_held(&mvm->mutex)); 3047 return sta->addr; 3048 } 3049 3050 3051 return NULL; 3052 } 3053 3054 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3055 struct ieee80211_vif *vif, 3056 struct ieee80211_sta *sta, 3057 struct ieee80211_key_conf *keyconf, 3058 u8 key_offset, 3059 bool mcast) 3060 { 3061 int ret; 3062 const u8 *addr; 3063 struct ieee80211_key_seq seq; 3064 u16 p1k[5]; 3065 u32 sta_id; 3066 3067 if (sta) { 3068 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3069 3070 sta_id = mvm_sta->sta_id; 3071 } else if (vif->type == NL80211_IFTYPE_AP && 3072 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3073 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3074 3075 sta_id = mvmvif->mcast_sta.sta_id; 3076 } else { 3077 IWL_ERR(mvm, "Failed to find station id\n"); 3078 return -EINVAL; 3079 } 3080 3081 switch (keyconf->cipher) { 3082 case WLAN_CIPHER_SUITE_TKIP: 3083 if (vif->type == NL80211_IFTYPE_AP) { 3084 ret = -EINVAL; 3085 break; 3086 } 3087 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3088 /* get phase 1 key from mac80211 */ 3089 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3090 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3091 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3092 seq.tkip.iv32, p1k, 0, key_offset); 3093 break; 3094 case WLAN_CIPHER_SUITE_CCMP: 3095 case WLAN_CIPHER_SUITE_WEP40: 3096 case WLAN_CIPHER_SUITE_WEP104: 3097 case WLAN_CIPHER_SUITE_GCMP: 3098 case WLAN_CIPHER_SUITE_GCMP_256: 3099 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3100 0, NULL, 0, key_offset); 3101 break; 3102 default: 3103 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3104 0, NULL, 0, key_offset); 3105 } 3106 3107 return ret; 3108 } 3109 3110 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3111 struct ieee80211_key_conf *keyconf, 3112 bool mcast) 3113 { 3114 union { 3115 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3116 struct iwl_mvm_add_sta_key_cmd cmd; 3117 } u = {}; 3118 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3119 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3120 __le16 key_flags; 3121 int ret, size; 3122 u32 status; 3123 3124 if (sta_id == IWL_MVM_INVALID_STA) 3125 return -EINVAL; 3126 3127 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3128 STA_KEY_FLG_KEYID_MSK); 3129 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3130 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3131 3132 if (mcast) 3133 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3134 3135 /* 3136 * The fields assigned here are in the same location at the start 3137 * of the command, so we can do this union trick. 3138 */ 3139 u.cmd.common.key_flags = key_flags; 3140 u.cmd.common.key_offset = keyconf->hw_key_idx; 3141 u.cmd.common.sta_id = sta_id; 3142 3143 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3144 3145 status = ADD_STA_SUCCESS; 3146 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3147 &status); 3148 3149 switch (status) { 3150 case ADD_STA_SUCCESS: 3151 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3152 break; 3153 default: 3154 ret = -EIO; 3155 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3156 break; 3157 } 3158 3159 return ret; 3160 } 3161 3162 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3163 struct ieee80211_vif *vif, 3164 struct ieee80211_sta *sta, 3165 struct ieee80211_key_conf *keyconf, 3166 u8 key_offset) 3167 { 3168 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3169 struct iwl_mvm_sta *mvm_sta; 3170 u8 sta_id = IWL_MVM_INVALID_STA; 3171 int ret; 3172 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3173 3174 lockdep_assert_held(&mvm->mutex); 3175 3176 if (vif->type != NL80211_IFTYPE_AP || 3177 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3178 /* Get the station id from the mvm local station table */ 3179 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3180 if (!mvm_sta) { 3181 IWL_ERR(mvm, "Failed to find station\n"); 3182 return -EINVAL; 3183 } 3184 sta_id = mvm_sta->sta_id; 3185 3186 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3187 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3188 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3189 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, 3190 false); 3191 goto end; 3192 } 3193 3194 /* 3195 * It is possible that the 'sta' parameter is NULL, and thus 3196 * there is a need to retrieve the sta from the local station 3197 * table. 3198 */ 3199 if (!sta) { 3200 sta = rcu_dereference_protected( 3201 mvm->fw_id_to_mac_id[sta_id], 3202 lockdep_is_held(&mvm->mutex)); 3203 if (IS_ERR_OR_NULL(sta)) { 3204 IWL_ERR(mvm, "Invalid station id\n"); 3205 return -EINVAL; 3206 } 3207 } 3208 3209 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3210 return -EINVAL; 3211 } 3212 3213 /* If the key_offset is not pre-assigned, we need to find a 3214 * new offset to use. In normal cases, the offset is not 3215 * pre-assigned, but during HW_RESTART we want to reuse the 3216 * same indices, so we pass them when this function is called. 3217 * 3218 * In D3 entry, we need to hardcoded the indices (because the 3219 * firmware hardcodes the PTK offset to 0). In this case, we 3220 * need to make sure we don't overwrite the hw_key_idx in the 3221 * keyconf structure, because otherwise we cannot configure 3222 * the original ones back when resuming. 3223 */ 3224 if (key_offset == STA_KEY_IDX_INVALID) { 3225 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3226 if (key_offset == STA_KEY_IDX_INVALID) 3227 return -ENOSPC; 3228 keyconf->hw_key_idx = key_offset; 3229 } 3230 3231 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3232 if (ret) 3233 goto end; 3234 3235 /* 3236 * For WEP, the same key is used for multicast and unicast. Upload it 3237 * again, using the same key offset, and now pointing the other one 3238 * to the same key slot (offset). 3239 * If this fails, remove the original as well. 3240 */ 3241 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3242 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3243 sta) { 3244 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3245 key_offset, !mcast); 3246 if (ret) { 3247 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3248 goto end; 3249 } 3250 } 3251 3252 __set_bit(key_offset, mvm->fw_key_table); 3253 3254 end: 3255 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3256 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3257 sta ? sta->addr : zero_addr, ret); 3258 return ret; 3259 } 3260 3261 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3262 struct ieee80211_vif *vif, 3263 struct ieee80211_sta *sta, 3264 struct ieee80211_key_conf *keyconf) 3265 { 3266 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3267 struct iwl_mvm_sta *mvm_sta; 3268 u8 sta_id = IWL_MVM_INVALID_STA; 3269 int ret, i; 3270 3271 lockdep_assert_held(&mvm->mutex); 3272 3273 /* Get the station from the mvm local station table */ 3274 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3275 if (mvm_sta) 3276 sta_id = mvm_sta->sta_id; 3277 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3278 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3279 3280 3281 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3282 keyconf->keyidx, sta_id); 3283 3284 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3285 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3286 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3287 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3288 3289 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3290 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3291 keyconf->hw_key_idx); 3292 return -ENOENT; 3293 } 3294 3295 /* track which key was deleted last */ 3296 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3297 if (mvm->fw_key_deleted[i] < U8_MAX) 3298 mvm->fw_key_deleted[i]++; 3299 } 3300 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3301 3302 if (sta && !mvm_sta) { 3303 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3304 return 0; 3305 } 3306 3307 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3308 if (ret) 3309 return ret; 3310 3311 /* delete WEP key twice to get rid of (now useless) offset */ 3312 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3313 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3314 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3315 3316 return ret; 3317 } 3318 3319 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3320 struct ieee80211_vif *vif, 3321 struct ieee80211_key_conf *keyconf, 3322 struct ieee80211_sta *sta, u32 iv32, 3323 u16 *phase1key) 3324 { 3325 struct iwl_mvm_sta *mvm_sta; 3326 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3327 3328 rcu_read_lock(); 3329 3330 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3331 if (WARN_ON_ONCE(!mvm_sta)) 3332 goto unlock; 3333 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3334 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3335 3336 unlock: 3337 rcu_read_unlock(); 3338 } 3339 3340 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3341 struct ieee80211_sta *sta) 3342 { 3343 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3344 struct iwl_mvm_add_sta_cmd cmd = { 3345 .add_modify = STA_MODE_MODIFY, 3346 .sta_id = mvmsta->sta_id, 3347 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3348 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3349 }; 3350 int ret; 3351 3352 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3353 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3354 if (ret) 3355 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3356 } 3357 3358 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3359 struct ieee80211_sta *sta, 3360 enum ieee80211_frame_release_type reason, 3361 u16 cnt, u16 tids, bool more_data, 3362 bool single_sta_queue) 3363 { 3364 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3365 struct iwl_mvm_add_sta_cmd cmd = { 3366 .add_modify = STA_MODE_MODIFY, 3367 .sta_id = mvmsta->sta_id, 3368 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3369 .sleep_tx_count = cpu_to_le16(cnt), 3370 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3371 }; 3372 int tid, ret; 3373 unsigned long _tids = tids; 3374 3375 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3376 * Note that this field is reserved and unused by firmware not 3377 * supporting GO uAPSD, so it's safe to always do this. 3378 */ 3379 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3380 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3381 3382 /* If we're releasing frames from aggregation or dqa queues then check 3383 * if all the queues that we're releasing frames from, combined, have: 3384 * - more frames than the service period, in which case more_data 3385 * needs to be set 3386 * - fewer than 'cnt' frames, in which case we need to adjust the 3387 * firmware command (but do that unconditionally) 3388 */ 3389 if (single_sta_queue) { 3390 int remaining = cnt; 3391 int sleep_tx_count; 3392 3393 spin_lock_bh(&mvmsta->lock); 3394 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3395 struct iwl_mvm_tid_data *tid_data; 3396 u16 n_queued; 3397 3398 tid_data = &mvmsta->tid_data[tid]; 3399 3400 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3401 if (n_queued > remaining) { 3402 more_data = true; 3403 remaining = 0; 3404 break; 3405 } 3406 remaining -= n_queued; 3407 } 3408 sleep_tx_count = cnt - remaining; 3409 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3410 mvmsta->sleep_tx_count = sleep_tx_count; 3411 spin_unlock_bh(&mvmsta->lock); 3412 3413 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3414 if (WARN_ON(cnt - remaining == 0)) { 3415 ieee80211_sta_eosp(sta); 3416 return; 3417 } 3418 } 3419 3420 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3421 if (more_data) 3422 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3423 3424 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3425 mvmsta->next_status_eosp = true; 3426 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3427 } else { 3428 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3429 } 3430 3431 /* block the Tx queues until the FW updated the sleep Tx count */ 3432 iwl_trans_block_txq_ptrs(mvm->trans, true); 3433 3434 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3435 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3436 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3437 if (ret) 3438 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3439 } 3440 3441 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3442 struct iwl_rx_cmd_buffer *rxb) 3443 { 3444 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3445 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3446 struct ieee80211_sta *sta; 3447 u32 sta_id = le32_to_cpu(notif->sta_id); 3448 3449 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3450 return; 3451 3452 rcu_read_lock(); 3453 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3454 if (!IS_ERR_OR_NULL(sta)) 3455 ieee80211_sta_eosp(sta); 3456 rcu_read_unlock(); 3457 } 3458 3459 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3460 struct iwl_mvm_sta *mvmsta, bool disable) 3461 { 3462 struct iwl_mvm_add_sta_cmd cmd = { 3463 .add_modify = STA_MODE_MODIFY, 3464 .sta_id = mvmsta->sta_id, 3465 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3466 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3467 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3468 }; 3469 int ret; 3470 3471 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3472 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3473 if (ret) 3474 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3475 } 3476 3477 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3478 struct ieee80211_sta *sta, 3479 bool disable) 3480 { 3481 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3482 3483 spin_lock_bh(&mvm_sta->lock); 3484 3485 if (mvm_sta->disable_tx == disable) { 3486 spin_unlock_bh(&mvm_sta->lock); 3487 return; 3488 } 3489 3490 mvm_sta->disable_tx = disable; 3491 3492 /* Tell mac80211 to start/stop queuing tx for this station */ 3493 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3494 3495 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3496 3497 spin_unlock_bh(&mvm_sta->lock); 3498 } 3499 3500 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3501 struct iwl_mvm_vif *mvmvif, 3502 struct iwl_mvm_int_sta *sta, 3503 bool disable) 3504 { 3505 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3506 struct iwl_mvm_add_sta_cmd cmd = { 3507 .add_modify = STA_MODE_MODIFY, 3508 .sta_id = sta->sta_id, 3509 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3510 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3511 .mac_id_n_color = cpu_to_le32(id), 3512 }; 3513 int ret; 3514 3515 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3516 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3517 if (ret) 3518 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3519 } 3520 3521 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3522 struct iwl_mvm_vif *mvmvif, 3523 bool disable) 3524 { 3525 struct ieee80211_sta *sta; 3526 struct iwl_mvm_sta *mvm_sta; 3527 int i; 3528 3529 lockdep_assert_held(&mvm->mutex); 3530 3531 /* Block/unblock all the stations of the given mvmvif */ 3532 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3533 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3534 lockdep_is_held(&mvm->mutex)); 3535 if (IS_ERR_OR_NULL(sta)) 3536 continue; 3537 3538 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3539 if (mvm_sta->mac_id_n_color != 3540 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3541 continue; 3542 3543 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3544 } 3545 3546 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3547 return; 3548 3549 /* Need to block/unblock also multicast station */ 3550 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3551 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3552 &mvmvif->mcast_sta, disable); 3553 3554 /* 3555 * Only unblock the broadcast station (FW blocks it for immediate 3556 * quiet, not the driver) 3557 */ 3558 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3559 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3560 &mvmvif->bcast_sta, disable); 3561 } 3562 3563 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3564 { 3565 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3566 struct iwl_mvm_sta *mvmsta; 3567 3568 rcu_read_lock(); 3569 3570 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3571 3572 if (!WARN_ON(!mvmsta)) 3573 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3574 3575 rcu_read_unlock(); 3576 } 3577 3578 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3579 { 3580 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3581 3582 /* 3583 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 3584 * to align the wrap around of ssn so we compare relevant values. 3585 */ 3586 if (mvm->trans->cfg->gen2) 3587 sn &= 0xff; 3588 3589 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3590 } 3591