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 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, 301 struct ieee80211_sta *sta) 302 { 303 unsigned long used_hw_queues; 304 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 305 unsigned int wdg_timeout = 306 iwl_mvm_get_wd_timeout(mvm, NULL, true, false); 307 u32 ac; 308 309 lockdep_assert_held(&mvm->mutex); 310 311 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); 312 313 /* Find available queues, and allocate them to the ACs */ 314 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 315 u8 queue = find_first_zero_bit(&used_hw_queues, 316 mvm->first_agg_queue); 317 318 if (queue >= mvm->first_agg_queue) { 319 IWL_ERR(mvm, "Failed to allocate STA queue\n"); 320 return -EBUSY; 321 } 322 323 __set_bit(queue, &used_hw_queues); 324 mvmsta->hw_queue[ac] = queue; 325 } 326 327 /* Found a place for all queues - enable them */ 328 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 329 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], 330 mvmsta->hw_queue[ac], 331 iwl_mvm_ac_to_tx_fifo[ac], 0, 332 wdg_timeout); 333 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); 334 } 335 336 return 0; 337 } 338 339 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, 340 struct ieee80211_sta *sta) 341 { 342 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 343 unsigned long sta_msk; 344 int i; 345 346 lockdep_assert_held(&mvm->mutex); 347 348 /* disable the TDLS STA-specific queues */ 349 sta_msk = mvmsta->tfd_queue_msk; 350 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) 351 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); 352 } 353 354 /* Disable aggregations for a bitmap of TIDs for a given station */ 355 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, 356 unsigned long disable_agg_tids, 357 bool remove_queue) 358 { 359 struct iwl_mvm_add_sta_cmd cmd = {}; 360 struct ieee80211_sta *sta; 361 struct iwl_mvm_sta *mvmsta; 362 u32 status; 363 u8 sta_id; 364 int ret; 365 366 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 367 return -EINVAL; 368 369 spin_lock_bh(&mvm->queue_info_lock); 370 sta_id = mvm->queue_info[queue].ra_sta_id; 371 spin_unlock_bh(&mvm->queue_info_lock); 372 373 rcu_read_lock(); 374 375 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 376 377 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 378 rcu_read_unlock(); 379 return -EINVAL; 380 } 381 382 mvmsta = iwl_mvm_sta_from_mac80211(sta); 383 384 mvmsta->tid_disable_agg |= disable_agg_tids; 385 386 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 387 cmd.sta_id = mvmsta->sta_id; 388 cmd.add_modify = STA_MODE_MODIFY; 389 cmd.modify_mask = STA_MODIFY_QUEUES; 390 if (disable_agg_tids) 391 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 392 if (remove_queue) 393 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; 394 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 395 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 396 397 rcu_read_unlock(); 398 399 /* Notify FW of queue removal from the STA queues */ 400 status = ADD_STA_SUCCESS; 401 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 402 iwl_mvm_add_sta_cmd_size(mvm), 403 &cmd, &status); 404 405 return ret; 406 } 407 408 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) 409 { 410 struct ieee80211_sta *sta; 411 struct iwl_mvm_sta *mvmsta; 412 unsigned long tid_bitmap; 413 unsigned long agg_tids = 0; 414 u8 sta_id; 415 int tid; 416 417 lockdep_assert_held(&mvm->mutex); 418 419 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 420 return -EINVAL; 421 422 spin_lock_bh(&mvm->queue_info_lock); 423 sta_id = mvm->queue_info[queue].ra_sta_id; 424 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 425 spin_unlock_bh(&mvm->queue_info_lock); 426 427 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 428 lockdep_is_held(&mvm->mutex)); 429 430 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 431 return -EINVAL; 432 433 mvmsta = iwl_mvm_sta_from_mac80211(sta); 434 435 spin_lock_bh(&mvmsta->lock); 436 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 437 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 438 agg_tids |= BIT(tid); 439 } 440 spin_unlock_bh(&mvmsta->lock); 441 442 return agg_tids; 443 } 444 445 /* 446 * Remove a queue from a station's resources. 447 * Note that this only marks as free. It DOESN'T delete a BA agreement, and 448 * doesn't disable the queue 449 */ 450 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) 451 { 452 struct ieee80211_sta *sta; 453 struct iwl_mvm_sta *mvmsta; 454 unsigned long tid_bitmap; 455 unsigned long disable_agg_tids = 0; 456 u8 sta_id; 457 int tid; 458 459 lockdep_assert_held(&mvm->mutex); 460 461 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 462 return -EINVAL; 463 464 spin_lock_bh(&mvm->queue_info_lock); 465 sta_id = mvm->queue_info[queue].ra_sta_id; 466 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 467 spin_unlock_bh(&mvm->queue_info_lock); 468 469 rcu_read_lock(); 470 471 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 472 473 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 474 rcu_read_unlock(); 475 return 0; 476 } 477 478 mvmsta = iwl_mvm_sta_from_mac80211(sta); 479 480 spin_lock_bh(&mvmsta->lock); 481 /* Unmap MAC queues and TIDs from this queue */ 482 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { 483 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) 484 disable_agg_tids |= BIT(tid); 485 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE; 486 } 487 488 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ 489 spin_unlock_bh(&mvmsta->lock); 490 491 rcu_read_unlock(); 492 493 return disable_agg_tids; 494 } 495 496 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, 497 bool same_sta) 498 { 499 struct iwl_mvm_sta *mvmsta; 500 u8 txq_curr_ac, sta_id, tid; 501 unsigned long disable_agg_tids = 0; 502 int ret; 503 504 lockdep_assert_held(&mvm->mutex); 505 506 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 507 return -EINVAL; 508 509 spin_lock_bh(&mvm->queue_info_lock); 510 txq_curr_ac = mvm->queue_info[queue].mac80211_ac; 511 sta_id = mvm->queue_info[queue].ra_sta_id; 512 tid = mvm->queue_info[queue].txq_tid; 513 spin_unlock_bh(&mvm->queue_info_lock); 514 515 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 516 if (WARN_ON(!mvmsta)) 517 return -EINVAL; 518 519 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); 520 /* Disable the queue */ 521 if (disable_agg_tids) 522 iwl_mvm_invalidate_sta_queue(mvm, queue, 523 disable_agg_tids, false); 524 525 ret = iwl_mvm_disable_txq(mvm, queue, 526 mvmsta->vif->hw_queue[txq_curr_ac], 527 tid, 0); 528 if (ret) { 529 /* Re-mark the inactive queue as inactive */ 530 spin_lock_bh(&mvm->queue_info_lock); 531 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; 532 spin_unlock_bh(&mvm->queue_info_lock); 533 IWL_ERR(mvm, 534 "Failed to free inactive queue %d (ret=%d)\n", 535 queue, ret); 536 537 return ret; 538 } 539 540 /* If TXQ is allocated to another STA, update removal in FW */ 541 if (!same_sta) 542 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); 543 544 return 0; 545 } 546 547 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, 548 unsigned long tfd_queue_mask, u8 ac) 549 { 550 int queue = 0; 551 u8 ac_to_queue[IEEE80211_NUM_ACS]; 552 int i; 553 554 lockdep_assert_held(&mvm->queue_info_lock); 555 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 556 return -EINVAL; 557 558 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); 559 560 /* See what ACs the existing queues for this STA have */ 561 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { 562 /* Only DATA queues can be shared */ 563 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && 564 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) 565 continue; 566 567 /* Don't try and take queues being reconfigured */ 568 if (mvm->queue_info[queue].status == 569 IWL_MVM_QUEUE_RECONFIGURING) 570 continue; 571 572 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; 573 } 574 575 /* 576 * The queue to share is chosen only from DATA queues as follows (in 577 * descending priority): 578 * 1. An AC_BE queue 579 * 2. Same AC queue 580 * 3. Highest AC queue that is lower than new AC 581 * 4. Any existing AC (there always is at least 1 DATA queue) 582 */ 583 584 /* Priority 1: An AC_BE queue */ 585 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) 586 queue = ac_to_queue[IEEE80211_AC_BE]; 587 /* Priority 2: Same AC queue */ 588 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 589 queue = ac_to_queue[ac]; 590 /* Priority 3a: If new AC is VO and VI exists - use VI */ 591 else if (ac == IEEE80211_AC_VO && 592 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 593 queue = ac_to_queue[IEEE80211_AC_VI]; 594 /* Priority 3b: No BE so only AC less than the new one is BK */ 595 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) 596 queue = ac_to_queue[IEEE80211_AC_BK]; 597 /* Priority 4a: No BE nor BK - use VI if exists */ 598 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) 599 queue = ac_to_queue[IEEE80211_AC_VI]; 600 /* Priority 4b: No BE, BK nor VI - use VO if exists */ 601 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) 602 queue = ac_to_queue[IEEE80211_AC_VO]; 603 604 /* Make sure queue found (or not) is legal */ 605 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && 606 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && 607 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { 608 IWL_ERR(mvm, "No DATA queues available to share\n"); 609 return -ENOSPC; 610 } 611 612 /* Make sure the queue isn't in the middle of being reconfigured */ 613 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { 614 IWL_ERR(mvm, 615 "TXQ %d is in the middle of re-config - try again\n", 616 queue); 617 return -EBUSY; 618 } 619 620 return queue; 621 } 622 623 /* 624 * If a given queue has a higher AC than the TID stream that is being compared 625 * to, the queue needs to be redirected to the lower AC. This function does that 626 * in such a case, otherwise - if no redirection required - it does nothing, 627 * unless the %force param is true. 628 */ 629 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, 630 int ac, int ssn, unsigned int wdg_timeout, 631 bool force) 632 { 633 struct iwl_scd_txq_cfg_cmd cmd = { 634 .scd_queue = queue, 635 .action = SCD_CFG_DISABLE_QUEUE, 636 }; 637 bool shared_queue; 638 unsigned long mq; 639 int ret; 640 641 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 642 return -EINVAL; 643 644 /* 645 * If the AC is lower than current one - FIFO needs to be redirected to 646 * the lowest one of the streams in the queue. Check if this is needed 647 * here. 648 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with 649 * value 3 and VO with value 0, so to check if ac X is lower than ac Y 650 * we need to check if the numerical value of X is LARGER than of Y. 651 */ 652 spin_lock_bh(&mvm->queue_info_lock); 653 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { 654 spin_unlock_bh(&mvm->queue_info_lock); 655 656 IWL_DEBUG_TX_QUEUES(mvm, 657 "No redirection needed on TXQ #%d\n", 658 queue); 659 return 0; 660 } 661 662 cmd.sta_id = mvm->queue_info[queue].ra_sta_id; 663 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; 664 cmd.tid = mvm->queue_info[queue].txq_tid; 665 mq = mvm->hw_queue_to_mac80211[queue]; 666 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); 667 spin_unlock_bh(&mvm->queue_info_lock); 668 669 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", 670 queue, iwl_mvm_ac_to_tx_fifo[ac]); 671 672 /* Stop MAC queues and wait for this queue to empty */ 673 iwl_mvm_stop_mac_queues(mvm, mq); 674 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); 675 if (ret) { 676 IWL_ERR(mvm, "Error draining queue %d before reconfig\n", 677 queue); 678 ret = -EIO; 679 goto out; 680 } 681 682 /* Before redirecting the queue we need to de-activate it */ 683 iwl_trans_txq_disable(mvm->trans, queue, false); 684 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 685 if (ret) 686 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, 687 ret); 688 689 /* Make sure the SCD wrptr is correctly set before reconfiguring */ 690 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout); 691 692 /* Update the TID "owner" of the queue */ 693 spin_lock_bh(&mvm->queue_info_lock); 694 mvm->queue_info[queue].txq_tid = tid; 695 spin_unlock_bh(&mvm->queue_info_lock); 696 697 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ 698 699 /* Redirect to lower AC */ 700 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], 701 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, 702 ssn); 703 704 /* Update AC marking of the queue */ 705 spin_lock_bh(&mvm->queue_info_lock); 706 mvm->queue_info[queue].mac80211_ac = ac; 707 spin_unlock_bh(&mvm->queue_info_lock); 708 709 /* 710 * Mark queue as shared in transport if shared 711 * Note this has to be done after queue enablement because enablement 712 * can also set this value, and there is no indication there to shared 713 * queues 714 */ 715 if (shared_queue) 716 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 717 718 out: 719 /* Continue using the MAC queues */ 720 iwl_mvm_start_mac_queues(mvm, mq); 721 722 return ret; 723 } 724 725 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm, 726 struct ieee80211_sta *sta, u8 ac, 727 int tid) 728 { 729 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 730 unsigned int wdg_timeout = 731 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 732 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 733 int queue = -1; 734 735 lockdep_assert_held(&mvm->mutex); 736 737 IWL_DEBUG_TX_QUEUES(mvm, 738 "Allocating queue for sta %d on tid %d\n", 739 mvmsta->sta_id, tid); 740 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid, 741 wdg_timeout); 742 if (queue < 0) 743 return queue; 744 745 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue); 746 747 spin_lock_bh(&mvmsta->lock); 748 mvmsta->tid_data[tid].txq_id = queue; 749 mvmsta->tid_data[tid].is_tid_active = true; 750 spin_unlock_bh(&mvmsta->lock); 751 752 return 0; 753 } 754 755 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, 756 struct ieee80211_sta *sta, u8 ac, int tid, 757 struct ieee80211_hdr *hdr) 758 { 759 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 760 struct iwl_trans_txq_scd_cfg cfg = { 761 .fifo = iwl_mvm_ac_to_tx_fifo[ac], 762 .sta_id = mvmsta->sta_id, 763 .tid = tid, 764 .frame_limit = IWL_FRAME_LIMIT, 765 }; 766 unsigned int wdg_timeout = 767 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 768 u8 mac_queue = mvmsta->vif->hw_queue[ac]; 769 int queue = -1; 770 bool using_inactive_queue = false, same_sta = false; 771 unsigned long disable_agg_tids = 0; 772 enum iwl_mvm_agg_state queue_state; 773 bool shared_queue = false, inc_ssn; 774 int ssn; 775 unsigned long tfd_queue_mask; 776 int ret; 777 778 lockdep_assert_held(&mvm->mutex); 779 780 if (iwl_mvm_has_new_tx_api(mvm)) 781 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid); 782 783 spin_lock_bh(&mvmsta->lock); 784 tfd_queue_mask = mvmsta->tfd_queue_msk; 785 spin_unlock_bh(&mvmsta->lock); 786 787 spin_lock_bh(&mvm->queue_info_lock); 788 789 /* 790 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one 791 * exists 792 */ 793 if (!ieee80211_is_data_qos(hdr->frame_control) || 794 ieee80211_is_qos_nullfunc(hdr->frame_control)) { 795 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 796 IWL_MVM_DQA_MIN_MGMT_QUEUE, 797 IWL_MVM_DQA_MAX_MGMT_QUEUE); 798 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) 799 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", 800 queue); 801 802 /* If no such queue is found, we'll use a DATA queue instead */ 803 } 804 805 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && 806 (mvm->queue_info[mvmsta->reserved_queue].status == 807 IWL_MVM_QUEUE_RESERVED || 808 mvm->queue_info[mvmsta->reserved_queue].status == 809 IWL_MVM_QUEUE_INACTIVE)) { 810 queue = mvmsta->reserved_queue; 811 mvm->queue_info[queue].reserved = true; 812 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); 813 } 814 815 if (queue < 0) 816 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 817 IWL_MVM_DQA_MIN_DATA_QUEUE, 818 IWL_MVM_DQA_MAX_DATA_QUEUE); 819 820 /* 821 * Check if this queue is already allocated but inactive. 822 * In such a case, we'll need to first free this queue before enabling 823 * it again, so we'll mark it as reserved to make sure no new traffic 824 * arrives on it 825 */ 826 if (queue > 0 && 827 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 828 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 829 using_inactive_queue = true; 830 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 831 IWL_DEBUG_TX_QUEUES(mvm, 832 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", 833 queue, mvmsta->sta_id, tid); 834 } 835 836 /* No free queue - we'll have to share */ 837 if (queue <= 0) { 838 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); 839 if (queue > 0) { 840 shared_queue = true; 841 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; 842 } 843 } 844 845 /* 846 * Mark TXQ as ready, even though it hasn't been fully configured yet, 847 * to make sure no one else takes it. 848 * This will allow avoiding re-acquiring the lock at the end of the 849 * configuration. On error we'll mark it back as free. 850 */ 851 if ((queue > 0) && !shared_queue) 852 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 853 854 spin_unlock_bh(&mvm->queue_info_lock); 855 856 /* This shouldn't happen - out of queues */ 857 if (WARN_ON(queue <= 0)) { 858 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", 859 tid, cfg.sta_id); 860 return queue; 861 } 862 863 /* 864 * Actual en/disablement of aggregations is through the ADD_STA HCMD, 865 * but for configuring the SCD to send A-MPDUs we need to mark the queue 866 * as aggregatable. 867 * Mark all DATA queues as allowing to be aggregated at some point 868 */ 869 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || 870 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); 871 872 /* 873 * If this queue was previously inactive (idle) - we need to free it 874 * first 875 */ 876 if (using_inactive_queue) { 877 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 878 if (ret) 879 return ret; 880 } 881 882 IWL_DEBUG_TX_QUEUES(mvm, 883 "Allocating %squeue #%d to sta %d on tid %d\n", 884 shared_queue ? "shared " : "", queue, 885 mvmsta->sta_id, tid); 886 887 if (shared_queue) { 888 /* Disable any open aggs on this queue */ 889 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); 890 891 if (disable_agg_tids) { 892 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", 893 queue); 894 iwl_mvm_invalidate_sta_queue(mvm, queue, 895 disable_agg_tids, false); 896 } 897 } 898 899 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); 900 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue, 901 ssn, &cfg, wdg_timeout); 902 if (inc_ssn) { 903 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ; 904 le16_add_cpu(&hdr->seq_ctrl, 0x10); 905 } 906 907 /* 908 * Mark queue as shared in transport if shared 909 * Note this has to be done after queue enablement because enablement 910 * can also set this value, and there is no indication there to shared 911 * queues 912 */ 913 if (shared_queue) 914 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); 915 916 spin_lock_bh(&mvmsta->lock); 917 /* 918 * This looks racy, but it is not. We have only one packet for 919 * this ra/tid in our Tx path since we stop the Qdisc when we 920 * need to allocate a new TFD queue. 921 */ 922 if (inc_ssn) 923 mvmsta->tid_data[tid].seq_number += 0x10; 924 mvmsta->tid_data[tid].txq_id = queue; 925 mvmsta->tid_data[tid].is_tid_active = true; 926 mvmsta->tfd_queue_msk |= BIT(queue); 927 queue_state = mvmsta->tid_data[tid].state; 928 929 if (mvmsta->reserved_queue == queue) 930 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; 931 spin_unlock_bh(&mvmsta->lock); 932 933 if (!shared_queue) { 934 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); 935 if (ret) 936 goto out_err; 937 938 /* If we need to re-enable aggregations... */ 939 if (queue_state == IWL_AGG_ON) { 940 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 941 if (ret) 942 goto out_err; 943 } 944 } else { 945 /* Redirect queue, if needed */ 946 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, 947 wdg_timeout, false); 948 if (ret) 949 goto out_err; 950 } 951 952 return 0; 953 954 out_err: 955 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); 956 957 return ret; 958 } 959 960 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue) 961 { 962 struct iwl_scd_txq_cfg_cmd cmd = { 963 .scd_queue = queue, 964 .action = SCD_CFG_UPDATE_QUEUE_TID, 965 }; 966 int tid; 967 unsigned long tid_bitmap; 968 int ret; 969 970 lockdep_assert_held(&mvm->mutex); 971 972 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 973 return; 974 975 spin_lock_bh(&mvm->queue_info_lock); 976 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 977 spin_unlock_bh(&mvm->queue_info_lock); 978 979 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) 980 return; 981 982 /* Find any TID for queue */ 983 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 984 cmd.tid = tid; 985 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 986 987 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); 988 if (ret) { 989 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n", 990 queue, ret); 991 return; 992 } 993 994 spin_lock_bh(&mvm->queue_info_lock); 995 mvm->queue_info[queue].txq_tid = tid; 996 spin_unlock_bh(&mvm->queue_info_lock); 997 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n", 998 queue, tid); 999 } 1000 1001 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) 1002 { 1003 struct ieee80211_sta *sta; 1004 struct iwl_mvm_sta *mvmsta; 1005 u8 sta_id; 1006 int tid = -1; 1007 unsigned long tid_bitmap; 1008 unsigned int wdg_timeout; 1009 int ssn; 1010 int ret = true; 1011 1012 /* queue sharing is disabled on new TX path */ 1013 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1014 return; 1015 1016 lockdep_assert_held(&mvm->mutex); 1017 1018 spin_lock_bh(&mvm->queue_info_lock); 1019 sta_id = mvm->queue_info[queue].ra_sta_id; 1020 tid_bitmap = mvm->queue_info[queue].tid_bitmap; 1021 spin_unlock_bh(&mvm->queue_info_lock); 1022 1023 /* Find TID for queue, and make sure it is the only one on the queue */ 1024 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); 1025 if (tid_bitmap != BIT(tid)) { 1026 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", 1027 queue, tid_bitmap); 1028 return; 1029 } 1030 1031 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, 1032 tid); 1033 1034 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1035 lockdep_is_held(&mvm->mutex)); 1036 1037 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1038 return; 1039 1040 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1041 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); 1042 1043 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); 1044 1045 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, 1046 tid_to_mac80211_ac[tid], ssn, 1047 wdg_timeout, true); 1048 if (ret) { 1049 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); 1050 return; 1051 } 1052 1053 /* If aggs should be turned back on - do it */ 1054 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { 1055 struct iwl_mvm_add_sta_cmd cmd = {0}; 1056 1057 mvmsta->tid_disable_agg &= ~BIT(tid); 1058 1059 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1060 cmd.sta_id = mvmsta->sta_id; 1061 cmd.add_modify = STA_MODE_MODIFY; 1062 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1063 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); 1064 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); 1065 1066 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1067 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1068 if (!ret) { 1069 IWL_DEBUG_TX_QUEUES(mvm, 1070 "TXQ #%d is now aggregated again\n", 1071 queue); 1072 1073 /* Mark queue intenally as aggregating again */ 1074 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); 1075 } 1076 } 1077 1078 spin_lock_bh(&mvm->queue_info_lock); 1079 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 1080 spin_unlock_bh(&mvm->queue_info_lock); 1081 } 1082 1083 static inline u8 iwl_mvm_tid_to_ac_queue(int tid) 1084 { 1085 if (tid == IWL_MAX_TID_COUNT) 1086 return IEEE80211_AC_VO; /* MGMT */ 1087 1088 return tid_to_mac80211_ac[tid]; 1089 } 1090 1091 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, 1092 struct ieee80211_sta *sta, int tid) 1093 { 1094 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1095 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1096 struct sk_buff *skb; 1097 struct ieee80211_hdr *hdr; 1098 struct sk_buff_head deferred_tx; 1099 u8 mac_queue; 1100 bool no_queue = false; /* Marks if there is a problem with the queue */ 1101 u8 ac; 1102 1103 lockdep_assert_held(&mvm->mutex); 1104 1105 skb = skb_peek(&tid_data->deferred_tx_frames); 1106 if (!skb) 1107 return; 1108 hdr = (void *)skb->data; 1109 1110 ac = iwl_mvm_tid_to_ac_queue(tid); 1111 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; 1112 1113 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE && 1114 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { 1115 IWL_ERR(mvm, 1116 "Can't alloc TXQ for sta %d tid %d - dropping frame\n", 1117 mvmsta->sta_id, tid); 1118 1119 /* 1120 * Mark queue as problematic so later the deferred traffic is 1121 * freed, as we can do nothing with it 1122 */ 1123 no_queue = true; 1124 } 1125 1126 __skb_queue_head_init(&deferred_tx); 1127 1128 /* Disable bottom-halves when entering TX path */ 1129 local_bh_disable(); 1130 spin_lock(&mvmsta->lock); 1131 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); 1132 mvmsta->deferred_traffic_tid_map &= ~BIT(tid); 1133 spin_unlock(&mvmsta->lock); 1134 1135 while ((skb = __skb_dequeue(&deferred_tx))) 1136 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) 1137 ieee80211_free_txskb(mvm->hw, skb); 1138 local_bh_enable(); 1139 1140 /* Wake queue */ 1141 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); 1142 } 1143 1144 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) 1145 { 1146 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, 1147 add_stream_wk); 1148 struct ieee80211_sta *sta; 1149 struct iwl_mvm_sta *mvmsta; 1150 unsigned long deferred_tid_traffic; 1151 int queue, sta_id, tid; 1152 1153 /* Check inactivity of queues */ 1154 iwl_mvm_inactivity_check(mvm); 1155 1156 mutex_lock(&mvm->mutex); 1157 1158 /* No queue reconfiguration in TVQM mode */ 1159 if (iwl_mvm_has_new_tx_api(mvm)) 1160 goto alloc_queues; 1161 1162 /* Reconfigure queues requiring reconfiguation */ 1163 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) { 1164 bool reconfig; 1165 bool change_owner; 1166 1167 spin_lock_bh(&mvm->queue_info_lock); 1168 reconfig = (mvm->queue_info[queue].status == 1169 IWL_MVM_QUEUE_RECONFIGURING); 1170 1171 /* 1172 * We need to take into account a situation in which a TXQ was 1173 * allocated to TID x, and then turned shared by adding TIDs y 1174 * and z. If TID x becomes inactive and is removed from the TXQ, 1175 * ownership must be given to one of the remaining TIDs. 1176 * This is mainly because if TID x continues - a new queue can't 1177 * be allocated for it as long as it is an owner of another TXQ. 1178 */ 1179 change_owner = !(mvm->queue_info[queue].tid_bitmap & 1180 BIT(mvm->queue_info[queue].txq_tid)) && 1181 (mvm->queue_info[queue].status == 1182 IWL_MVM_QUEUE_SHARED); 1183 spin_unlock_bh(&mvm->queue_info_lock); 1184 1185 if (reconfig) 1186 iwl_mvm_unshare_queue(mvm, queue); 1187 else if (change_owner) 1188 iwl_mvm_change_queue_owner(mvm, queue); 1189 } 1190 1191 alloc_queues: 1192 /* Go over all stations with deferred traffic */ 1193 for_each_set_bit(sta_id, mvm->sta_deferred_frames, 1194 IWL_MVM_STATION_COUNT) { 1195 clear_bit(sta_id, mvm->sta_deferred_frames); 1196 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1197 lockdep_is_held(&mvm->mutex)); 1198 if (IS_ERR_OR_NULL(sta)) 1199 continue; 1200 1201 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1202 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; 1203 1204 for_each_set_bit(tid, &deferred_tid_traffic, 1205 IWL_MAX_TID_COUNT + 1) 1206 iwl_mvm_tx_deferred_stream(mvm, sta, tid); 1207 } 1208 1209 mutex_unlock(&mvm->mutex); 1210 } 1211 1212 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, 1213 struct ieee80211_sta *sta, 1214 enum nl80211_iftype vif_type) 1215 { 1216 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1217 int queue; 1218 bool using_inactive_queue = false, same_sta = false; 1219 1220 /* queue reserving is disabled on new TX path */ 1221 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1222 return 0; 1223 1224 /* 1225 * Check for inactive queues, so we don't reach a situation where we 1226 * can't add a STA due to a shortage in queues that doesn't really exist 1227 */ 1228 iwl_mvm_inactivity_check(mvm); 1229 1230 spin_lock_bh(&mvm->queue_info_lock); 1231 1232 /* Make sure we have free resources for this STA */ 1233 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && 1234 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && 1235 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == 1236 IWL_MVM_QUEUE_FREE)) 1237 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 1238 else 1239 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 1240 IWL_MVM_DQA_MIN_DATA_QUEUE, 1241 IWL_MVM_DQA_MAX_DATA_QUEUE); 1242 if (queue < 0) { 1243 spin_unlock_bh(&mvm->queue_info_lock); 1244 IWL_ERR(mvm, "No available queues for new station\n"); 1245 return -ENOSPC; 1246 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { 1247 /* 1248 * If this queue is already allocated but inactive we'll need to 1249 * first free this queue before enabling it again, we'll mark 1250 * it as reserved to make sure no new traffic arrives on it 1251 */ 1252 using_inactive_queue = true; 1253 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id; 1254 } 1255 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; 1256 1257 spin_unlock_bh(&mvm->queue_info_lock); 1258 1259 mvmsta->reserved_queue = queue; 1260 1261 if (using_inactive_queue) 1262 iwl_mvm_free_inactive_queue(mvm, queue, same_sta); 1263 1264 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", 1265 queue, mvmsta->sta_id); 1266 1267 return 0; 1268 } 1269 1270 /* 1271 * In DQA mode, after a HW restart the queues should be allocated as before, in 1272 * order to avoid race conditions when there are shared queues. This function 1273 * does the re-mapping and queue allocation. 1274 * 1275 * Note that re-enabling aggregations isn't done in this function. 1276 */ 1277 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, 1278 struct iwl_mvm_sta *mvm_sta) 1279 { 1280 unsigned int wdg_timeout = 1281 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); 1282 int i; 1283 struct iwl_trans_txq_scd_cfg cfg = { 1284 .sta_id = mvm_sta->sta_id, 1285 .frame_limit = IWL_FRAME_LIMIT, 1286 }; 1287 1288 /* Make sure reserved queue is still marked as such (if allocated) */ 1289 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) 1290 mvm->queue_info[mvm_sta->reserved_queue].status = 1291 IWL_MVM_QUEUE_RESERVED; 1292 1293 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1294 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; 1295 int txq_id = tid_data->txq_id; 1296 int ac; 1297 u8 mac_queue; 1298 1299 if (txq_id == IWL_MVM_INVALID_QUEUE) 1300 continue; 1301 1302 skb_queue_head_init(&tid_data->deferred_tx_frames); 1303 1304 ac = tid_to_mac80211_ac[i]; 1305 mac_queue = mvm_sta->vif->hw_queue[ac]; 1306 1307 if (iwl_mvm_has_new_tx_api(mvm)) { 1308 IWL_DEBUG_TX_QUEUES(mvm, 1309 "Re-mapping sta %d tid %d\n", 1310 mvm_sta->sta_id, i); 1311 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, 1312 mvm_sta->sta_id, 1313 i, wdg_timeout); 1314 tid_data->txq_id = txq_id; 1315 } else { 1316 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1317 1318 cfg.tid = i; 1319 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac]; 1320 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || 1321 txq_id == 1322 IWL_MVM_DQA_BSS_CLIENT_QUEUE); 1323 1324 IWL_DEBUG_TX_QUEUES(mvm, 1325 "Re-mapping sta %d tid %d to queue %d\n", 1326 mvm_sta->sta_id, i, txq_id); 1327 1328 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg, 1329 wdg_timeout); 1330 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1331 } 1332 } 1333 1334 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0); 1335 } 1336 1337 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 1338 struct ieee80211_vif *vif, 1339 struct ieee80211_sta *sta) 1340 { 1341 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1342 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1343 struct iwl_mvm_rxq_dup_data *dup_data; 1344 int i, ret, sta_id; 1345 1346 lockdep_assert_held(&mvm->mutex); 1347 1348 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1349 sta_id = iwl_mvm_find_free_sta_id(mvm, 1350 ieee80211_vif_type_p2p(vif)); 1351 else 1352 sta_id = mvm_sta->sta_id; 1353 1354 if (sta_id == IWL_MVM_INVALID_STA) 1355 return -ENOSPC; 1356 1357 spin_lock_init(&mvm_sta->lock); 1358 1359 /* In DQA mode, if this is a HW restart, re-alloc existing queues */ 1360 if (iwl_mvm_is_dqa_supported(mvm) && 1361 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1362 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); 1363 goto update_fw; 1364 } 1365 1366 mvm_sta->sta_id = sta_id; 1367 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 1368 mvmvif->color); 1369 mvm_sta->vif = vif; 1370 if (!mvm->trans->cfg->gen2) 1371 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 1372 else 1373 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF; 1374 mvm_sta->tx_protection = 0; 1375 mvm_sta->tt_tx_protection = false; 1376 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK; 1377 1378 /* HW restart, don't assume the memory has been zeroed */ 1379 atomic_set(&mvm->pending_frames[sta_id], 0); 1380 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 1381 mvm_sta->tfd_queue_msk = 0; 1382 1383 /* 1384 * Allocate new queues for a TDLS station, unless we're in DQA mode, 1385 * and then they'll be allocated dynamically 1386 */ 1387 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) { 1388 ret = iwl_mvm_tdls_sta_init(mvm, sta); 1389 if (ret) 1390 return ret; 1391 } else if (!iwl_mvm_is_dqa_supported(mvm)) { 1392 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1393 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 1394 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); 1395 } 1396 1397 /* for HW restart - reset everything but the sequence number */ 1398 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 1399 u16 seq = mvm_sta->tid_data[i].seq_number; 1400 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 1401 mvm_sta->tid_data[i].seq_number = seq; 1402 1403 if (!iwl_mvm_is_dqa_supported(mvm)) 1404 continue; 1405 1406 /* 1407 * Mark all queues for this STA as unallocated and defer TX 1408 * frames until the queue is allocated 1409 */ 1410 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1411 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); 1412 } 1413 mvm_sta->deferred_traffic_tid_map = 0; 1414 mvm_sta->agg_tids = 0; 1415 1416 if (iwl_mvm_has_new_rx_api(mvm) && 1417 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1418 int q; 1419 1420 dup_data = kcalloc(mvm->trans->num_rx_queues, 1421 sizeof(*dup_data), GFP_KERNEL); 1422 if (!dup_data) 1423 return -ENOMEM; 1424 /* 1425 * Initialize all the last_seq values to 0xffff which can never 1426 * compare equal to the frame's seq_ctrl in the check in 1427 * iwl_mvm_is_dup() since the lower 4 bits are the fragment 1428 * number and fragmented packets don't reach that function. 1429 * 1430 * This thus allows receiving a packet with seqno 0 and the 1431 * retry bit set as the very first packet on a new TID. 1432 */ 1433 for (q = 0; q < mvm->trans->num_rx_queues; q++) 1434 memset(dup_data[q].last_seq, 0xff, 1435 sizeof(dup_data[q].last_seq)); 1436 mvm_sta->dup_data = dup_data; 1437 } 1438 1439 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1440 ret = iwl_mvm_reserve_sta_stream(mvm, sta, 1441 ieee80211_vif_type_p2p(vif)); 1442 if (ret) 1443 goto err; 1444 } 1445 1446 update_fw: 1447 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0); 1448 if (ret) 1449 goto err; 1450 1451 if (vif->type == NL80211_IFTYPE_STATION) { 1452 if (!sta->tdls) { 1453 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA); 1454 mvmvif->ap_sta_id = sta_id; 1455 } else { 1456 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA); 1457 } 1458 } 1459 1460 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 1461 1462 return 0; 1463 1464 err: 1465 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1466 iwl_mvm_tdls_sta_deinit(mvm, sta); 1467 return ret; 1468 } 1469 1470 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 1471 bool drain) 1472 { 1473 struct iwl_mvm_add_sta_cmd cmd = {}; 1474 int ret; 1475 u32 status; 1476 1477 lockdep_assert_held(&mvm->mutex); 1478 1479 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 1480 cmd.sta_id = mvmsta->sta_id; 1481 cmd.add_modify = STA_MODE_MODIFY; 1482 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 1483 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 1484 1485 status = ADD_STA_SUCCESS; 1486 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1487 iwl_mvm_add_sta_cmd_size(mvm), 1488 &cmd, &status); 1489 if (ret) 1490 return ret; 1491 1492 switch (status & IWL_ADD_STA_STATUS_MASK) { 1493 case ADD_STA_SUCCESS: 1494 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 1495 mvmsta->sta_id); 1496 break; 1497 default: 1498 ret = -EIO; 1499 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 1500 mvmsta->sta_id); 1501 break; 1502 } 1503 1504 return ret; 1505 } 1506 1507 /* 1508 * Remove a station from the FW table. Before sending the command to remove 1509 * the station validate that the station is indeed known to the driver (sanity 1510 * only). 1511 */ 1512 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 1513 { 1514 struct ieee80211_sta *sta; 1515 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 1516 .sta_id = sta_id, 1517 }; 1518 int ret; 1519 1520 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1521 lockdep_is_held(&mvm->mutex)); 1522 1523 /* Note: internal stations are marked as error values */ 1524 if (!sta) { 1525 IWL_ERR(mvm, "Invalid station id\n"); 1526 return -EINVAL; 1527 } 1528 1529 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 1530 sizeof(rm_sta_cmd), &rm_sta_cmd); 1531 if (ret) { 1532 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 1533 return ret; 1534 } 1535 1536 return 0; 1537 } 1538 1539 void iwl_mvm_sta_drained_wk(struct work_struct *wk) 1540 { 1541 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); 1542 u8 sta_id; 1543 1544 /* 1545 * The mutex is needed because of the SYNC cmd, but not only: if the 1546 * work would run concurrently with iwl_mvm_rm_sta, it would run before 1547 * iwl_mvm_rm_sta sets the station as busy, and exit. Then 1548 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean 1549 * that later. 1550 */ 1551 mutex_lock(&mvm->mutex); 1552 1553 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { 1554 int ret; 1555 struct ieee80211_sta *sta = 1556 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1557 lockdep_is_held(&mvm->mutex)); 1558 1559 /* 1560 * This station is in use or RCU-removed; the latter happens in 1561 * managed mode, where mac80211 removes the station before we 1562 * can remove it from firmware (we can only do that after the 1563 * MAC is marked unassociated), and possibly while the deauth 1564 * frame to disconnect from the AP is still queued. Then, the 1565 * station pointer is -ENOENT when the last skb is reclaimed. 1566 */ 1567 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) 1568 continue; 1569 1570 if (PTR_ERR(sta) == -EINVAL) { 1571 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", 1572 sta_id); 1573 continue; 1574 } 1575 1576 if (!sta) { 1577 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", 1578 sta_id); 1579 continue; 1580 } 1581 1582 WARN_ON(PTR_ERR(sta) != -EBUSY); 1583 /* This station was removed and we waited until it got drained, 1584 * we can now proceed and remove it. 1585 */ 1586 ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1587 if (ret) { 1588 IWL_ERR(mvm, 1589 "Couldn't remove sta %d after it was drained\n", 1590 sta_id); 1591 continue; 1592 } 1593 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1594 clear_bit(sta_id, mvm->sta_drained); 1595 1596 if (mvm->tfd_drained[sta_id]) { 1597 unsigned long i, msk = mvm->tfd_drained[sta_id]; 1598 1599 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) 1600 iwl_mvm_disable_txq(mvm, i, i, 1601 IWL_MAX_TID_COUNT, 0); 1602 1603 mvm->tfd_drained[sta_id] = 0; 1604 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", 1605 sta_id, msk); 1606 } 1607 } 1608 1609 mutex_unlock(&mvm->mutex); 1610 } 1611 1612 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, 1613 struct ieee80211_vif *vif, 1614 struct iwl_mvm_sta *mvm_sta) 1615 { 1616 int ac; 1617 int i; 1618 1619 lockdep_assert_held(&mvm->mutex); 1620 1621 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1622 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE) 1623 continue; 1624 1625 ac = iwl_mvm_tid_to_ac_queue(i); 1626 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, 1627 vif->hw_queue[ac], i, 0); 1628 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE; 1629 } 1630 } 1631 1632 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm, 1633 struct iwl_mvm_sta *mvm_sta) 1634 { 1635 int i, ret; 1636 1637 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { 1638 u16 txq_id; 1639 1640 spin_lock_bh(&mvm_sta->lock); 1641 txq_id = mvm_sta->tid_data[i].txq_id; 1642 spin_unlock_bh(&mvm_sta->lock); 1643 1644 if (txq_id == IWL_MVM_INVALID_QUEUE) 1645 continue; 1646 1647 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id); 1648 if (ret) 1649 break; 1650 } 1651 1652 return ret; 1653 } 1654 1655 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 1656 struct ieee80211_vif *vif, 1657 struct ieee80211_sta *sta) 1658 { 1659 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1660 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1661 u8 sta_id = mvm_sta->sta_id; 1662 int ret; 1663 1664 lockdep_assert_held(&mvm->mutex); 1665 1666 if (iwl_mvm_has_new_rx_api(mvm)) 1667 kfree(mvm_sta->dup_data); 1668 1669 if ((vif->type == NL80211_IFTYPE_STATION && 1670 mvmvif->ap_sta_id == sta_id) || 1671 iwl_mvm_is_dqa_supported(mvm)){ 1672 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1673 if (ret) 1674 return ret; 1675 /* flush its queues here since we are freeing mvm_sta */ 1676 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0); 1677 if (ret) 1678 return ret; 1679 if (iwl_mvm_has_new_tx_api(mvm)) { 1680 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta); 1681 } else { 1682 u32 q_mask = mvm_sta->tfd_queue_msk; 1683 1684 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 1685 q_mask); 1686 } 1687 if (ret) 1688 return ret; 1689 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 1690 1691 /* If DQA is supported - the queues can be disabled now */ 1692 if (iwl_mvm_is_dqa_supported(mvm)) { 1693 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); 1694 /* 1695 * If pending_frames is set at this point - it must be 1696 * driver internal logic error, since queues are empty 1697 * and removed successuly. 1698 * warn on it but set it to 0 anyway to avoid station 1699 * not being removed later in the function 1700 */ 1701 WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0)); 1702 } 1703 1704 /* If there is a TXQ still marked as reserved - free it */ 1705 if (iwl_mvm_is_dqa_supported(mvm) && 1706 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { 1707 u8 reserved_txq = mvm_sta->reserved_queue; 1708 enum iwl_mvm_queue_status *status; 1709 1710 /* 1711 * If no traffic has gone through the reserved TXQ - it 1712 * is still marked as IWL_MVM_QUEUE_RESERVED, and 1713 * should be manually marked as free again 1714 */ 1715 spin_lock_bh(&mvm->queue_info_lock); 1716 status = &mvm->queue_info[reserved_txq].status; 1717 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) && 1718 (*status != IWL_MVM_QUEUE_FREE), 1719 "sta_id %d reserved txq %d status %d", 1720 sta_id, reserved_txq, *status)) { 1721 spin_unlock_bh(&mvm->queue_info_lock); 1722 return -EINVAL; 1723 } 1724 1725 *status = IWL_MVM_QUEUE_FREE; 1726 spin_unlock_bh(&mvm->queue_info_lock); 1727 } 1728 1729 if (vif->type == NL80211_IFTYPE_STATION && 1730 mvmvif->ap_sta_id == sta_id) { 1731 /* if associated - we can't remove the AP STA now */ 1732 if (vif->bss_conf.assoc) 1733 return ret; 1734 1735 /* unassoc - go ahead - remove the AP STA now */ 1736 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1737 1738 /* clear d0i3_ap_sta_id if no longer relevant */ 1739 if (mvm->d0i3_ap_sta_id == sta_id) 1740 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1741 } 1742 } 1743 1744 /* 1745 * This shouldn't happen - the TDLS channel switch should be canceled 1746 * before the STA is removed. 1747 */ 1748 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) { 1749 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; 1750 cancel_delayed_work(&mvm->tdls_cs.dwork); 1751 } 1752 1753 /* 1754 * Make sure that the tx response code sees the station as -EBUSY and 1755 * calls the drain worker. 1756 */ 1757 spin_lock_bh(&mvm_sta->lock); 1758 1759 /* 1760 * There are frames pending on the AC queues for this station. 1761 * We need to wait until all the frames are drained... 1762 */ 1763 if (atomic_read(&mvm->pending_frames[sta_id])) { 1764 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], 1765 ERR_PTR(-EBUSY)); 1766 spin_unlock_bh(&mvm_sta->lock); 1767 1768 /* disable TDLS sta queues on drain complete */ 1769 if (sta->tdls) { 1770 mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk; 1771 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id); 1772 } 1773 1774 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 1775 } else { 1776 spin_unlock_bh(&mvm_sta->lock); 1777 1778 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) 1779 iwl_mvm_tdls_sta_deinit(mvm, sta); 1780 1781 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 1782 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 1783 } 1784 1785 return ret; 1786 } 1787 1788 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 1789 struct ieee80211_vif *vif, 1790 u8 sta_id) 1791 { 1792 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 1793 1794 lockdep_assert_held(&mvm->mutex); 1795 1796 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 1797 return ret; 1798 } 1799 1800 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 1801 struct iwl_mvm_int_sta *sta, 1802 u32 qmask, enum nl80211_iftype iftype, 1803 enum iwl_sta_type type) 1804 { 1805 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1806 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 1807 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA)) 1808 return -ENOSPC; 1809 } 1810 1811 sta->tfd_queue_msk = qmask; 1812 sta->type = type; 1813 1814 /* put a non-NULL value so iterating over the stations won't stop */ 1815 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 1816 return 0; 1817 } 1818 1819 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) 1820 { 1821 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 1822 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 1823 sta->sta_id = IWL_MVM_INVALID_STA; 1824 } 1825 1826 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 1827 struct iwl_mvm_int_sta *sta, 1828 const u8 *addr, 1829 u16 mac_id, u16 color) 1830 { 1831 struct iwl_mvm_add_sta_cmd cmd; 1832 int ret; 1833 u32 status; 1834 1835 lockdep_assert_held(&mvm->mutex); 1836 1837 memset(&cmd, 0, sizeof(cmd)); 1838 cmd.sta_id = sta->sta_id; 1839 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 1840 color)); 1841 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 1842 cmd.station_type = sta->type; 1843 1844 if (!iwl_mvm_has_new_tx_api(mvm)) 1845 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 1846 cmd.tid_disable_tx = cpu_to_le16(0xffff); 1847 1848 if (addr) 1849 memcpy(cmd.addr, addr, ETH_ALEN); 1850 1851 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 1852 iwl_mvm_add_sta_cmd_size(mvm), 1853 &cmd, &status); 1854 if (ret) 1855 return ret; 1856 1857 switch (status & IWL_ADD_STA_STATUS_MASK) { 1858 case ADD_STA_SUCCESS: 1859 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 1860 return 0; 1861 default: 1862 ret = -EIO; 1863 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 1864 status); 1865 break; 1866 } 1867 return ret; 1868 } 1869 1870 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm) 1871 { 1872 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 1873 mvm->cfg->base_params->wd_timeout : 1874 IWL_WATCHDOG_DISABLED; 1875 1876 if (iwl_mvm_has_new_tx_api(mvm)) { 1877 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue, 1878 mvm->aux_sta.sta_id, 1879 IWL_MAX_TID_COUNT, 1880 wdg_timeout); 1881 mvm->aux_queue = queue; 1882 } else if (iwl_mvm_is_dqa_supported(mvm)) { 1883 struct iwl_trans_txq_scd_cfg cfg = { 1884 .fifo = IWL_MVM_TX_FIFO_MCAST, 1885 .sta_id = mvm->aux_sta.sta_id, 1886 .tid = IWL_MAX_TID_COUNT, 1887 .aggregate = false, 1888 .frame_limit = IWL_FRAME_LIMIT, 1889 }; 1890 1891 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg, 1892 wdg_timeout); 1893 } else { 1894 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, 1895 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 1896 } 1897 } 1898 1899 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 1900 { 1901 int ret; 1902 1903 lockdep_assert_held(&mvm->mutex); 1904 1905 /* Allocate aux station and assign to it the aux queue */ 1906 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 1907 NL80211_IFTYPE_UNSPECIFIED, 1908 IWL_STA_AUX_ACTIVITY); 1909 if (ret) 1910 return ret; 1911 1912 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 1913 if (!iwl_mvm_has_new_tx_api(mvm)) 1914 iwl_mvm_enable_aux_queue(mvm); 1915 1916 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 1917 MAC_INDEX_AUX, 0); 1918 if (ret) { 1919 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1920 return ret; 1921 } 1922 1923 /* 1924 * For a000 firmware and on we cannot add queue to a station unknown 1925 * to firmware so enable queue here - after the station was added 1926 */ 1927 if (iwl_mvm_has_new_tx_api(mvm)) 1928 iwl_mvm_enable_aux_queue(mvm); 1929 1930 return 0; 1931 } 1932 1933 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1934 { 1935 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1936 1937 lockdep_assert_held(&mvm->mutex); 1938 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 1939 mvmvif->id, 0); 1940 } 1941 1942 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1943 { 1944 int ret; 1945 1946 lockdep_assert_held(&mvm->mutex); 1947 1948 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 1949 if (ret) 1950 IWL_WARN(mvm, "Failed sending remove station\n"); 1951 1952 return ret; 1953 } 1954 1955 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 1956 { 1957 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 1958 } 1959 1960 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 1961 { 1962 lockdep_assert_held(&mvm->mutex); 1963 1964 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 1965 } 1966 1967 /* 1968 * Send the add station command for the vif's broadcast station. 1969 * Assumes that the station was already allocated. 1970 * 1971 * @mvm: the mvm component 1972 * @vif: the interface to which the broadcast station is added 1973 * @bsta: the broadcast station to add. 1974 */ 1975 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1976 { 1977 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1978 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 1979 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1980 const u8 *baddr = _baddr; 1981 int queue; 1982 int ret; 1983 unsigned int wdg_timeout = 1984 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 1985 struct iwl_trans_txq_scd_cfg cfg = { 1986 .fifo = IWL_MVM_TX_FIFO_VO, 1987 .sta_id = mvmvif->bcast_sta.sta_id, 1988 .tid = IWL_MAX_TID_COUNT, 1989 .aggregate = false, 1990 .frame_limit = IWL_FRAME_LIMIT, 1991 }; 1992 1993 lockdep_assert_held(&mvm->mutex); 1994 1995 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1996 if (vif->type == NL80211_IFTYPE_AP || 1997 vif->type == NL80211_IFTYPE_ADHOC) 1998 queue = mvm->probe_queue; 1999 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2000 queue = mvm->p2p_dev_queue; 2001 else if (WARN(1, "Missing required TXQ for adding bcast STA\n")) 2002 return -EINVAL; 2003 2004 bsta->tfd_queue_msk |= BIT(queue); 2005 2006 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, 2007 &cfg, wdg_timeout); 2008 } 2009 2010 if (vif->type == NL80211_IFTYPE_ADHOC) 2011 baddr = vif->bss_conf.bssid; 2012 2013 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA)) 2014 return -ENOSPC; 2015 2016 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 2017 mvmvif->id, mvmvif->color); 2018 if (ret) 2019 return ret; 2020 2021 /* 2022 * For a000 firmware and on we cannot add queue to a station unknown 2023 * to firmware so enable queue here - after the station was added 2024 */ 2025 if (iwl_mvm_has_new_tx_api(mvm)) { 2026 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0], 2027 bsta->sta_id, 2028 IWL_MAX_TID_COUNT, 2029 wdg_timeout); 2030 2031 if (vif->type == NL80211_IFTYPE_AP || 2032 vif->type == NL80211_IFTYPE_ADHOC) 2033 mvm->probe_queue = queue; 2034 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 2035 mvm->p2p_dev_queue = queue; 2036 } 2037 2038 return 0; 2039 } 2040 2041 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm, 2042 struct ieee80211_vif *vif) 2043 { 2044 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2045 int queue; 2046 2047 lockdep_assert_held(&mvm->mutex); 2048 2049 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0); 2050 2051 switch (vif->type) { 2052 case NL80211_IFTYPE_AP: 2053 case NL80211_IFTYPE_ADHOC: 2054 queue = mvm->probe_queue; 2055 break; 2056 case NL80211_IFTYPE_P2P_DEVICE: 2057 queue = mvm->p2p_dev_queue; 2058 break; 2059 default: 2060 WARN(1, "Can't free bcast queue on vif type %d\n", 2061 vif->type); 2062 return; 2063 } 2064 2065 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0); 2066 if (iwl_mvm_has_new_tx_api(mvm)) 2067 return; 2068 2069 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue))); 2070 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue); 2071 } 2072 2073 /* Send the FW a request to remove the station from it's internal data 2074 * structures, but DO NOT remove the entry from the local data structures. */ 2075 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2076 { 2077 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2078 int ret; 2079 2080 lockdep_assert_held(&mvm->mutex); 2081 2082 if (iwl_mvm_is_dqa_supported(mvm)) 2083 iwl_mvm_free_bcast_sta_queues(mvm, vif); 2084 2085 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 2086 if (ret) 2087 IWL_WARN(mvm, "Failed sending remove station\n"); 2088 return ret; 2089 } 2090 2091 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2092 { 2093 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2094 u32 qmask = 0; 2095 2096 lockdep_assert_held(&mvm->mutex); 2097 2098 if (!iwl_mvm_is_dqa_supported(mvm)) { 2099 qmask = iwl_mvm_mac_get_queues_mask(vif); 2100 2101 /* 2102 * The firmware defines the TFD queue mask to only be relevant 2103 * for *unicast* queues, so the multicast (CAB) queue shouldn't 2104 * be included. This only happens in NL80211_IFTYPE_AP vif type, 2105 * so the next line will only have an effect there. 2106 */ 2107 qmask &= ~BIT(vif->cab_queue); 2108 } 2109 2110 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, 2111 ieee80211_vif_type_p2p(vif), 2112 IWL_STA_GENERAL_PURPOSE); 2113 } 2114 2115 /* Allocate a new station entry for the broadcast station to the given vif, 2116 * and send it to the FW. 2117 * Note that each P2P mac should have its own broadcast station. 2118 * 2119 * @mvm: the mvm component 2120 * @vif: the interface to which the broadcast station is added 2121 * @bsta: the broadcast station to add. */ 2122 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2123 { 2124 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2125 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 2126 int ret; 2127 2128 lockdep_assert_held(&mvm->mutex); 2129 2130 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 2131 if (ret) 2132 return ret; 2133 2134 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2135 2136 if (ret) 2137 iwl_mvm_dealloc_int_sta(mvm, bsta); 2138 2139 return ret; 2140 } 2141 2142 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2143 { 2144 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2145 2146 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 2147 } 2148 2149 /* 2150 * Send the FW a request to remove the station from it's internal data 2151 * structures, and in addition remove it from the local data structure. 2152 */ 2153 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2154 { 2155 int ret; 2156 2157 lockdep_assert_held(&mvm->mutex); 2158 2159 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 2160 2161 iwl_mvm_dealloc_bcast_sta(mvm, vif); 2162 2163 return ret; 2164 } 2165 2166 /* 2167 * Allocate a new station entry for the multicast station to the given vif, 2168 * and send it to the FW. 2169 * Note that each AP/GO mac should have its own multicast station. 2170 * 2171 * @mvm: the mvm component 2172 * @vif: the interface to which the multicast station is added 2173 */ 2174 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2175 { 2176 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2177 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta; 2178 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00}; 2179 const u8 *maddr = _maddr; 2180 struct iwl_trans_txq_scd_cfg cfg = { 2181 .fifo = IWL_MVM_TX_FIFO_MCAST, 2182 .sta_id = msta->sta_id, 2183 .tid = IWL_MAX_TID_COUNT, 2184 .aggregate = false, 2185 .frame_limit = IWL_FRAME_LIMIT, 2186 }; 2187 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false); 2188 int ret; 2189 2190 lockdep_assert_held(&mvm->mutex); 2191 2192 if (!iwl_mvm_is_dqa_supported(mvm)) 2193 return 0; 2194 2195 if (WARN_ON(vif->type != NL80211_IFTYPE_AP && 2196 vif->type != NL80211_IFTYPE_ADHOC)) 2197 return -ENOTSUPP; 2198 2199 /* 2200 * While in previous FWs we had to exclude cab queue from TFD queue 2201 * mask, now it is needed as any other queue. 2202 */ 2203 if (!iwl_mvm_has_new_tx_api(mvm) && 2204 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) { 2205 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2206 &cfg, timeout); 2207 msta->tfd_queue_msk |= BIT(vif->cab_queue); 2208 } 2209 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr, 2210 mvmvif->id, mvmvif->color); 2211 if (ret) { 2212 iwl_mvm_dealloc_int_sta(mvm, msta); 2213 return ret; 2214 } 2215 2216 /* 2217 * Enable cab queue after the ADD_STA command is sent. 2218 * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG 2219 * command with unknown station id, and for FW that doesn't support 2220 * station API since the cab queue is not included in the 2221 * tfd_queue_mask. 2222 */ 2223 if (iwl_mvm_has_new_tx_api(mvm)) { 2224 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue, 2225 msta->sta_id, 2226 IWL_MAX_TID_COUNT, 2227 timeout); 2228 mvmvif->cab_queue = queue; 2229 } else if (!fw_has_api(&mvm->fw->ucode_capa, 2230 IWL_UCODE_TLV_API_STA_TYPE)) { 2231 /* 2232 * In IBSS, ieee80211_check_queues() sets the cab_queue to be 2233 * invalid, so make sure we use the queue we want. 2234 * Note that this is done here as we want to avoid making DQA 2235 * changes in mac80211 layer. 2236 */ 2237 if (vif->type == NL80211_IFTYPE_ADHOC) { 2238 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; 2239 mvmvif->cab_queue = vif->cab_queue; 2240 } 2241 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, 2242 &cfg, timeout); 2243 } 2244 2245 return 0; 2246 } 2247 2248 /* 2249 * Send the FW a request to remove the station from it's internal data 2250 * structures, and in addition remove it from the local data structure. 2251 */ 2252 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 2253 { 2254 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2255 int ret; 2256 2257 lockdep_assert_held(&mvm->mutex); 2258 2259 if (!iwl_mvm_is_dqa_supported(mvm)) 2260 return 0; 2261 2262 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0); 2263 2264 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue, 2265 IWL_MAX_TID_COUNT, 0); 2266 2267 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id); 2268 if (ret) 2269 IWL_WARN(mvm, "Failed sending remove station\n"); 2270 2271 return ret; 2272 } 2273 2274 #define IWL_MAX_RX_BA_SESSIONS 16 2275 2276 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) 2277 { 2278 struct iwl_mvm_delba_notif notif = { 2279 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, 2280 .metadata.sync = 1, 2281 .delba.baid = baid, 2282 }; 2283 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); 2284 }; 2285 2286 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, 2287 struct iwl_mvm_baid_data *data) 2288 { 2289 int i; 2290 2291 iwl_mvm_sync_rxq_del_ba(mvm, data->baid); 2292 2293 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2294 int j; 2295 struct iwl_mvm_reorder_buffer *reorder_buf = 2296 &data->reorder_buf[i]; 2297 2298 spin_lock_bh(&reorder_buf->lock); 2299 if (likely(!reorder_buf->num_stored)) { 2300 spin_unlock_bh(&reorder_buf->lock); 2301 continue; 2302 } 2303 2304 /* 2305 * This shouldn't happen in regular DELBA since the internal 2306 * delBA notification should trigger a release of all frames in 2307 * the reorder buffer. 2308 */ 2309 WARN_ON(1); 2310 2311 for (j = 0; j < reorder_buf->buf_size; j++) 2312 __skb_queue_purge(&reorder_buf->entries[j]); 2313 /* 2314 * Prevent timer re-arm. This prevents a very far fetched case 2315 * where we timed out on the notification. There may be prior 2316 * RX frames pending in the RX queue before the notification 2317 * that might get processed between now and the actual deletion 2318 * and we would re-arm the timer although we are deleting the 2319 * reorder buffer. 2320 */ 2321 reorder_buf->removed = true; 2322 spin_unlock_bh(&reorder_buf->lock); 2323 del_timer_sync(&reorder_buf->reorder_timer); 2324 } 2325 } 2326 2327 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, 2328 u32 sta_id, 2329 struct iwl_mvm_baid_data *data, 2330 u16 ssn, u8 buf_size) 2331 { 2332 int i; 2333 2334 for (i = 0; i < mvm->trans->num_rx_queues; i++) { 2335 struct iwl_mvm_reorder_buffer *reorder_buf = 2336 &data->reorder_buf[i]; 2337 int j; 2338 2339 reorder_buf->num_stored = 0; 2340 reorder_buf->head_sn = ssn; 2341 reorder_buf->buf_size = buf_size; 2342 /* rx reorder timer */ 2343 reorder_buf->reorder_timer.function = 2344 iwl_mvm_reorder_timer_expired; 2345 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; 2346 init_timer(&reorder_buf->reorder_timer); 2347 spin_lock_init(&reorder_buf->lock); 2348 reorder_buf->mvm = mvm; 2349 reorder_buf->queue = i; 2350 reorder_buf->sta_id = sta_id; 2351 reorder_buf->valid = false; 2352 for (j = 0; j < reorder_buf->buf_size; j++) 2353 __skb_queue_head_init(&reorder_buf->entries[j]); 2354 } 2355 } 2356 2357 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2358 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) 2359 { 2360 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2361 struct iwl_mvm_add_sta_cmd cmd = {}; 2362 struct iwl_mvm_baid_data *baid_data = NULL; 2363 int ret; 2364 u32 status; 2365 2366 lockdep_assert_held(&mvm->mutex); 2367 2368 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 2369 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 2370 return -ENOSPC; 2371 } 2372 2373 if (iwl_mvm_has_new_rx_api(mvm) && start) { 2374 /* 2375 * Allocate here so if allocation fails we can bail out early 2376 * before starting the BA session in the firmware 2377 */ 2378 baid_data = kzalloc(sizeof(*baid_data) + 2379 mvm->trans->num_rx_queues * 2380 sizeof(baid_data->reorder_buf[0]), 2381 GFP_KERNEL); 2382 if (!baid_data) 2383 return -ENOMEM; 2384 } 2385 2386 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2387 cmd.sta_id = mvm_sta->sta_id; 2388 cmd.add_modify = STA_MODE_MODIFY; 2389 if (start) { 2390 cmd.add_immediate_ba_tid = (u8) tid; 2391 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 2392 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 2393 } else { 2394 cmd.remove_immediate_ba_tid = (u8) tid; 2395 } 2396 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 2397 STA_MODIFY_REMOVE_BA_TID; 2398 2399 status = ADD_STA_SUCCESS; 2400 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2401 iwl_mvm_add_sta_cmd_size(mvm), 2402 &cmd, &status); 2403 if (ret) 2404 goto out_free; 2405 2406 switch (status & IWL_ADD_STA_STATUS_MASK) { 2407 case ADD_STA_SUCCESS: 2408 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", 2409 start ? "start" : "stopp"); 2410 break; 2411 case ADD_STA_IMMEDIATE_BA_FAILURE: 2412 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 2413 ret = -ENOSPC; 2414 break; 2415 default: 2416 ret = -EIO; 2417 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 2418 start ? "start" : "stopp", status); 2419 break; 2420 } 2421 2422 if (ret) 2423 goto out_free; 2424 2425 if (start) { 2426 u8 baid; 2427 2428 mvm->rx_ba_sessions++; 2429 2430 if (!iwl_mvm_has_new_rx_api(mvm)) 2431 return 0; 2432 2433 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { 2434 ret = -EINVAL; 2435 goto out_free; 2436 } 2437 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> 2438 IWL_ADD_STA_BAID_SHIFT); 2439 baid_data->baid = baid; 2440 baid_data->timeout = timeout; 2441 baid_data->last_rx = jiffies; 2442 setup_timer(&baid_data->session_timer, 2443 iwl_mvm_rx_agg_session_expired, 2444 (unsigned long)&mvm->baid_map[baid]); 2445 baid_data->mvm = mvm; 2446 baid_data->tid = tid; 2447 baid_data->sta_id = mvm_sta->sta_id; 2448 2449 mvm_sta->tid_to_baid[tid] = baid; 2450 if (timeout) 2451 mod_timer(&baid_data->session_timer, 2452 TU_TO_EXP_TIME(timeout * 2)); 2453 2454 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, 2455 baid_data, ssn, buf_size); 2456 /* 2457 * protect the BA data with RCU to cover a case where our 2458 * internal RX sync mechanism will timeout (not that it's 2459 * supposed to happen) and we will free the session data while 2460 * RX is being processed in parallel 2461 */ 2462 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", 2463 mvm_sta->sta_id, tid, baid); 2464 WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); 2465 rcu_assign_pointer(mvm->baid_map[baid], baid_data); 2466 } else { 2467 u8 baid = mvm_sta->tid_to_baid[tid]; 2468 2469 if (mvm->rx_ba_sessions > 0) 2470 /* check that restart flow didn't zero the counter */ 2471 mvm->rx_ba_sessions--; 2472 if (!iwl_mvm_has_new_rx_api(mvm)) 2473 return 0; 2474 2475 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 2476 return -EINVAL; 2477 2478 baid_data = rcu_access_pointer(mvm->baid_map[baid]); 2479 if (WARN_ON(!baid_data)) 2480 return -EINVAL; 2481 2482 /* synchronize all rx queues so we can safely delete */ 2483 iwl_mvm_free_reorder(mvm, baid_data); 2484 del_timer_sync(&baid_data->session_timer); 2485 RCU_INIT_POINTER(mvm->baid_map[baid], NULL); 2486 kfree_rcu(baid_data, rcu_head); 2487 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); 2488 } 2489 return 0; 2490 2491 out_free: 2492 kfree(baid_data); 2493 return ret; 2494 } 2495 2496 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 2497 int tid, u8 queue, bool start) 2498 { 2499 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2500 struct iwl_mvm_add_sta_cmd cmd = {}; 2501 int ret; 2502 u32 status; 2503 2504 lockdep_assert_held(&mvm->mutex); 2505 2506 if (start) { 2507 mvm_sta->tfd_queue_msk |= BIT(queue); 2508 mvm_sta->tid_disable_agg &= ~BIT(tid); 2509 } else { 2510 /* In DQA-mode the queue isn't removed on agg termination */ 2511 if (!iwl_mvm_is_dqa_supported(mvm)) 2512 mvm_sta->tfd_queue_msk &= ~BIT(queue); 2513 mvm_sta->tid_disable_agg |= BIT(tid); 2514 } 2515 2516 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 2517 cmd.sta_id = mvm_sta->sta_id; 2518 cmd.add_modify = STA_MODE_MODIFY; 2519 if (!iwl_mvm_has_new_tx_api(mvm)) 2520 cmd.modify_mask = STA_MODIFY_QUEUES; 2521 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; 2522 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 2523 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 2524 2525 status = ADD_STA_SUCCESS; 2526 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 2527 iwl_mvm_add_sta_cmd_size(mvm), 2528 &cmd, &status); 2529 if (ret) 2530 return ret; 2531 2532 switch (status & IWL_ADD_STA_STATUS_MASK) { 2533 case ADD_STA_SUCCESS: 2534 break; 2535 default: 2536 ret = -EIO; 2537 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 2538 start ? "start" : "stopp", status); 2539 break; 2540 } 2541 2542 return ret; 2543 } 2544 2545 const u8 tid_to_mac80211_ac[] = { 2546 IEEE80211_AC_BE, 2547 IEEE80211_AC_BK, 2548 IEEE80211_AC_BK, 2549 IEEE80211_AC_BE, 2550 IEEE80211_AC_VI, 2551 IEEE80211_AC_VI, 2552 IEEE80211_AC_VO, 2553 IEEE80211_AC_VO, 2554 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ 2555 }; 2556 2557 static const u8 tid_to_ucode_ac[] = { 2558 AC_BE, 2559 AC_BK, 2560 AC_BK, 2561 AC_BE, 2562 AC_VI, 2563 AC_VI, 2564 AC_VO, 2565 AC_VO, 2566 }; 2567 2568 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2569 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 2570 { 2571 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2572 struct iwl_mvm_tid_data *tid_data; 2573 u16 normalized_ssn; 2574 int txq_id; 2575 int ret; 2576 2577 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 2578 return -EINVAL; 2579 2580 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 2581 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 2582 mvmsta->tid_data[tid].state); 2583 return -ENXIO; 2584 } 2585 2586 lockdep_assert_held(&mvm->mutex); 2587 2588 spin_lock_bh(&mvmsta->lock); 2589 2590 /* possible race condition - we entered D0i3 while starting agg */ 2591 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 2592 spin_unlock_bh(&mvmsta->lock); 2593 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 2594 return -EIO; 2595 } 2596 2597 spin_lock(&mvm->queue_info_lock); 2598 2599 /* 2600 * Note the possible cases: 2601 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed 2602 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free 2603 * one and mark it as reserved 2604 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in 2605 * non-DQA mode, since the TXQ hasn't yet been allocated 2606 * Don't support case 3 for new TX path as it is not expected to happen 2607 * and aggregation will be offloaded soon anyway 2608 */ 2609 txq_id = mvmsta->tid_data[tid].txq_id; 2610 if (iwl_mvm_has_new_tx_api(mvm)) { 2611 if (txq_id == IWL_MVM_INVALID_QUEUE) { 2612 ret = -ENXIO; 2613 goto release_locks; 2614 } 2615 } else if (iwl_mvm_is_dqa_supported(mvm) && 2616 unlikely(mvm->queue_info[txq_id].status == 2617 IWL_MVM_QUEUE_SHARED)) { 2618 ret = -ENXIO; 2619 IWL_DEBUG_TX_QUEUES(mvm, 2620 "Can't start tid %d agg on shared queue!\n", 2621 tid); 2622 goto release_locks; 2623 } else if (!iwl_mvm_is_dqa_supported(mvm) || 2624 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { 2625 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, 2626 mvm->first_agg_queue, 2627 mvm->last_agg_queue); 2628 if (txq_id < 0) { 2629 ret = txq_id; 2630 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 2631 goto release_locks; 2632 } 2633 /* 2634 * TXQ shouldn't be in inactive mode for non-DQA, so getting 2635 * an inactive queue from iwl_mvm_find_free_queue() is 2636 * certainly a bug 2637 */ 2638 WARN_ON(mvm->queue_info[txq_id].status == 2639 IWL_MVM_QUEUE_INACTIVE); 2640 2641 /* TXQ hasn't yet been enabled, so mark it only as reserved */ 2642 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; 2643 } 2644 2645 spin_unlock(&mvm->queue_info_lock); 2646 2647 IWL_DEBUG_TX_QUEUES(mvm, 2648 "AGG for tid %d will be on queue #%d\n", 2649 tid, txq_id); 2650 2651 tid_data = &mvmsta->tid_data[tid]; 2652 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2653 tid_data->txq_id = txq_id; 2654 *ssn = tid_data->ssn; 2655 2656 IWL_DEBUG_TX_QUEUES(mvm, 2657 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 2658 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 2659 tid_data->next_reclaimed); 2660 2661 /* 2662 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 2663 * to align the wrap around of ssn so we compare relevant values. 2664 */ 2665 normalized_ssn = tid_data->ssn; 2666 if (mvm->trans->cfg->gen2) 2667 normalized_ssn &= 0xff; 2668 2669 if (normalized_ssn == tid_data->next_reclaimed) { 2670 tid_data->state = IWL_AGG_STARTING; 2671 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2672 } else { 2673 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 2674 } 2675 2676 ret = 0; 2677 goto out; 2678 2679 release_locks: 2680 spin_unlock(&mvm->queue_info_lock); 2681 out: 2682 spin_unlock_bh(&mvmsta->lock); 2683 2684 return ret; 2685 } 2686 2687 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2688 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 2689 bool amsdu) 2690 { 2691 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2692 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2693 unsigned int wdg_timeout = 2694 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 2695 int queue, ret; 2696 bool alloc_queue = true; 2697 enum iwl_mvm_queue_status queue_status; 2698 u16 ssn; 2699 2700 struct iwl_trans_txq_scd_cfg cfg = { 2701 .sta_id = mvmsta->sta_id, 2702 .tid = tid, 2703 .frame_limit = buf_size, 2704 .aggregate = true, 2705 }; 2706 2707 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 2708 != IWL_MAX_TID_COUNT); 2709 2710 if (!mvm->trans->cfg->gen2) 2711 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 2712 else 2713 buf_size = min_t(int, buf_size, 2714 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF); 2715 2716 spin_lock_bh(&mvmsta->lock); 2717 ssn = tid_data->ssn; 2718 queue = tid_data->txq_id; 2719 tid_data->state = IWL_AGG_ON; 2720 mvmsta->agg_tids |= BIT(tid); 2721 tid_data->ssn = 0xffff; 2722 tid_data->amsdu_in_ampdu_allowed = amsdu; 2723 spin_unlock_bh(&mvmsta->lock); 2724 2725 if (iwl_mvm_has_new_tx_api(mvm)) { 2726 /* 2727 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so 2728 * no need to check queue's status 2729 */ 2730 if (buf_size < mvmsta->max_agg_bufsize) 2731 return -ENOTSUPP; 2732 2733 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2734 if (ret) 2735 return -EIO; 2736 goto out; 2737 } 2738 2739 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 2740 2741 spin_lock_bh(&mvm->queue_info_lock); 2742 queue_status = mvm->queue_info[queue].status; 2743 spin_unlock_bh(&mvm->queue_info_lock); 2744 2745 /* In DQA mode, the existing queue might need to be reconfigured */ 2746 if (iwl_mvm_is_dqa_supported(mvm)) { 2747 /* Maybe there is no need to even alloc a queue... */ 2748 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) 2749 alloc_queue = false; 2750 2751 /* 2752 * Only reconfig the SCD for the queue if the window size has 2753 * changed from current (become smaller) 2754 */ 2755 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { 2756 /* 2757 * If reconfiguring an existing queue, it first must be 2758 * drained 2759 */ 2760 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, 2761 BIT(queue)); 2762 if (ret) { 2763 IWL_ERR(mvm, 2764 "Error draining queue before reconfig\n"); 2765 return ret; 2766 } 2767 2768 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, 2769 mvmsta->sta_id, tid, 2770 buf_size, ssn); 2771 if (ret) { 2772 IWL_ERR(mvm, 2773 "Error reconfiguring TXQ #%d\n", queue); 2774 return ret; 2775 } 2776 } 2777 } 2778 2779 if (alloc_queue) 2780 iwl_mvm_enable_txq(mvm, queue, 2781 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, 2782 &cfg, wdg_timeout); 2783 2784 /* Send ADD_STA command to enable aggs only if the queue isn't shared */ 2785 if (queue_status != IWL_MVM_QUEUE_SHARED) { 2786 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 2787 if (ret) 2788 return -EIO; 2789 } 2790 2791 /* No need to mark as reserved */ 2792 spin_lock_bh(&mvm->queue_info_lock); 2793 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; 2794 spin_unlock_bh(&mvm->queue_info_lock); 2795 2796 out: 2797 /* 2798 * Even though in theory the peer could have different 2799 * aggregation reorder buffer sizes for different sessions, 2800 * our ucode doesn't allow for that and has a global limit 2801 * for each station. Therefore, use the minimum of all the 2802 * aggregation sessions and our default value. 2803 */ 2804 mvmsta->max_agg_bufsize = 2805 min(mvmsta->max_agg_bufsize, buf_size); 2806 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 2807 2808 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 2809 sta->addr, tid); 2810 2811 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 2812 } 2813 2814 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm, 2815 struct iwl_mvm_sta *mvmsta, 2816 u16 txq_id) 2817 { 2818 if (iwl_mvm_has_new_tx_api(mvm)) 2819 return; 2820 2821 spin_lock_bh(&mvm->queue_info_lock); 2822 /* 2823 * The TXQ is marked as reserved only if no traffic came through yet 2824 * This means no traffic has been sent on this TID (agg'd or not), so 2825 * we no longer have use for the queue. Since it hasn't even been 2826 * allocated through iwl_mvm_enable_txq, so we can just mark it back as 2827 * free. 2828 */ 2829 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) 2830 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; 2831 2832 spin_unlock_bh(&mvm->queue_info_lock); 2833 } 2834 2835 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2836 struct ieee80211_sta *sta, u16 tid) 2837 { 2838 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2839 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2840 u16 txq_id; 2841 int err; 2842 2843 /* 2844 * If mac80211 is cleaning its state, then say that we finished since 2845 * our state has been cleared anyway. 2846 */ 2847 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 2848 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2849 return 0; 2850 } 2851 2852 spin_lock_bh(&mvmsta->lock); 2853 2854 txq_id = tid_data->txq_id; 2855 2856 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 2857 mvmsta->sta_id, tid, txq_id, tid_data->state); 2858 2859 mvmsta->agg_tids &= ~BIT(tid); 2860 2861 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2862 2863 switch (tid_data->state) { 2864 case IWL_AGG_ON: 2865 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2866 2867 IWL_DEBUG_TX_QUEUES(mvm, 2868 "ssn = %d, next_recl = %d\n", 2869 tid_data->ssn, tid_data->next_reclaimed); 2870 2871 /* 2872 * There are still packets for this RA / TID in the HW. 2873 * Not relevant for DQA mode, since there is no need to disable 2874 * the queue. 2875 */ 2876 if (!iwl_mvm_is_dqa_supported(mvm) && 2877 tid_data->ssn != tid_data->next_reclaimed) { 2878 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; 2879 err = 0; 2880 break; 2881 } 2882 2883 tid_data->ssn = 0xffff; 2884 tid_data->state = IWL_AGG_OFF; 2885 spin_unlock_bh(&mvmsta->lock); 2886 2887 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2888 2889 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2890 2891 if (!iwl_mvm_is_dqa_supported(mvm)) { 2892 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2893 2894 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0); 2895 } 2896 return 0; 2897 case IWL_AGG_STARTING: 2898 case IWL_EMPTYING_HW_QUEUE_ADDBA: 2899 /* 2900 * The agg session has been stopped before it was set up. This 2901 * can happen when the AddBA timer times out for example. 2902 */ 2903 2904 /* No barriers since we are under mutex */ 2905 lockdep_assert_held(&mvm->mutex); 2906 2907 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2908 tid_data->state = IWL_AGG_OFF; 2909 err = 0; 2910 break; 2911 default: 2912 IWL_ERR(mvm, 2913 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 2914 mvmsta->sta_id, tid, tid_data->state); 2915 IWL_ERR(mvm, 2916 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 2917 err = -EINVAL; 2918 } 2919 2920 spin_unlock_bh(&mvmsta->lock); 2921 2922 return err; 2923 } 2924 2925 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2926 struct ieee80211_sta *sta, u16 tid) 2927 { 2928 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2929 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2930 u16 txq_id; 2931 enum iwl_mvm_agg_state old_state; 2932 2933 /* 2934 * First set the agg state to OFF to avoid calling 2935 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 2936 */ 2937 spin_lock_bh(&mvmsta->lock); 2938 txq_id = tid_data->txq_id; 2939 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 2940 mvmsta->sta_id, tid, txq_id, tid_data->state); 2941 old_state = tid_data->state; 2942 tid_data->state = IWL_AGG_OFF; 2943 mvmsta->agg_tids &= ~BIT(tid); 2944 spin_unlock_bh(&mvmsta->lock); 2945 2946 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id); 2947 2948 if (old_state >= IWL_AGG_ON) { 2949 iwl_mvm_drain_sta(mvm, mvmsta, true); 2950 2951 if (iwl_mvm_has_new_tx_api(mvm)) { 2952 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id, 2953 BIT(tid), 0)) 2954 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2955 iwl_trans_wait_txq_empty(mvm->trans, txq_id); 2956 } else { 2957 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 2958 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 2959 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id)); 2960 } 2961 2962 iwl_mvm_drain_sta(mvm, mvmsta, false); 2963 2964 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 2965 2966 if (!iwl_mvm_is_dqa_supported(mvm)) { 2967 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; 2968 2969 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue, 2970 tid, 0); 2971 } 2972 } 2973 2974 return 0; 2975 } 2976 2977 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 2978 { 2979 int i, max = -1, max_offs = -1; 2980 2981 lockdep_assert_held(&mvm->mutex); 2982 2983 /* Pick the unused key offset with the highest 'deleted' 2984 * counter. Every time a key is deleted, all the counters 2985 * are incremented and the one that was just deleted is 2986 * reset to zero. Thus, the highest counter is the one 2987 * that was deleted longest ago. Pick that one. 2988 */ 2989 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 2990 if (test_bit(i, mvm->fw_key_table)) 2991 continue; 2992 if (mvm->fw_key_deleted[i] > max) { 2993 max = mvm->fw_key_deleted[i]; 2994 max_offs = i; 2995 } 2996 } 2997 2998 if (max_offs < 0) 2999 return STA_KEY_IDX_INVALID; 3000 3001 return max_offs; 3002 } 3003 3004 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 3005 struct ieee80211_vif *vif, 3006 struct ieee80211_sta *sta) 3007 { 3008 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3009 3010 if (sta) 3011 return iwl_mvm_sta_from_mac80211(sta); 3012 3013 /* 3014 * The device expects GTKs for station interfaces to be 3015 * installed as GTKs for the AP station. If we have no 3016 * station ID, then use AP's station ID. 3017 */ 3018 if (vif->type == NL80211_IFTYPE_STATION && 3019 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3020 u8 sta_id = mvmvif->ap_sta_id; 3021 3022 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 3023 lockdep_is_held(&mvm->mutex)); 3024 3025 /* 3026 * It is possible that the 'sta' parameter is NULL, 3027 * for example when a GTK is removed - the sta_id will then 3028 * be the AP ID, and no station was passed by mac80211. 3029 */ 3030 if (IS_ERR_OR_NULL(sta)) 3031 return NULL; 3032 3033 return iwl_mvm_sta_from_mac80211(sta); 3034 } 3035 3036 return NULL; 3037 } 3038 3039 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 3040 u32 sta_id, 3041 struct ieee80211_key_conf *key, bool mcast, 3042 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 3043 u8 key_offset) 3044 { 3045 union { 3046 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3047 struct iwl_mvm_add_sta_key_cmd cmd; 3048 } u = {}; 3049 __le16 key_flags; 3050 int ret; 3051 u32 status; 3052 u16 keyidx; 3053 u64 pn = 0; 3054 int i, size; 3055 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3056 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3057 3058 if (sta_id == IWL_MVM_INVALID_STA) 3059 return -EINVAL; 3060 3061 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) & 3062 STA_KEY_FLG_KEYID_MSK; 3063 key_flags = cpu_to_le16(keyidx); 3064 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 3065 3066 switch (key->cipher) { 3067 case WLAN_CIPHER_SUITE_TKIP: 3068 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 3069 if (new_api) { 3070 memcpy((void *)&u.cmd.tx_mic_key, 3071 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 3072 IWL_MIC_KEY_SIZE); 3073 3074 memcpy((void *)&u.cmd.rx_mic_key, 3075 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 3076 IWL_MIC_KEY_SIZE); 3077 pn = atomic64_read(&key->tx_pn); 3078 3079 } else { 3080 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32; 3081 for (i = 0; i < 5; i++) 3082 u.cmd_v1.tkip_rx_ttak[i] = 3083 cpu_to_le16(tkip_p1k[i]); 3084 } 3085 memcpy(u.cmd.common.key, key->key, key->keylen); 3086 break; 3087 case WLAN_CIPHER_SUITE_CCMP: 3088 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 3089 memcpy(u.cmd.common.key, key->key, key->keylen); 3090 if (new_api) 3091 pn = atomic64_read(&key->tx_pn); 3092 break; 3093 case WLAN_CIPHER_SUITE_WEP104: 3094 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 3095 /* fall through */ 3096 case WLAN_CIPHER_SUITE_WEP40: 3097 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 3098 memcpy(u.cmd.common.key + 3, key->key, key->keylen); 3099 break; 3100 case WLAN_CIPHER_SUITE_GCMP_256: 3101 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); 3102 /* fall through */ 3103 case WLAN_CIPHER_SUITE_GCMP: 3104 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); 3105 memcpy(u.cmd.common.key, key->key, key->keylen); 3106 if (new_api) 3107 pn = atomic64_read(&key->tx_pn); 3108 break; 3109 default: 3110 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 3111 memcpy(u.cmd.common.key, key->key, key->keylen); 3112 } 3113 3114 if (mcast) 3115 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3116 3117 u.cmd.common.key_offset = key_offset; 3118 u.cmd.common.key_flags = key_flags; 3119 u.cmd.common.sta_id = sta_id; 3120 3121 if (new_api) { 3122 u.cmd.transmit_seq_cnt = cpu_to_le64(pn); 3123 size = sizeof(u.cmd); 3124 } else { 3125 size = sizeof(u.cmd_v1); 3126 } 3127 3128 status = ADD_STA_SUCCESS; 3129 if (cmd_flags & CMD_ASYNC) 3130 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size, 3131 &u.cmd); 3132 else 3133 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, 3134 &u.cmd, &status); 3135 3136 switch (status) { 3137 case ADD_STA_SUCCESS: 3138 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 3139 break; 3140 default: 3141 ret = -EIO; 3142 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 3143 break; 3144 } 3145 3146 return ret; 3147 } 3148 3149 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 3150 struct ieee80211_key_conf *keyconf, 3151 u8 sta_id, bool remove_key) 3152 { 3153 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 3154 3155 /* verify the key details match the required command's expectations */ 3156 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 3157 (keyconf->keyidx != 4 && keyconf->keyidx != 5) || 3158 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && 3159 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && 3160 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) 3161 return -EINVAL; 3162 3163 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && 3164 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) 3165 return -EINVAL; 3166 3167 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 3168 igtk_cmd.sta_id = cpu_to_le32(sta_id); 3169 3170 if (remove_key) { 3171 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 3172 } else { 3173 struct ieee80211_key_seq seq; 3174 const u8 *pn; 3175 3176 switch (keyconf->cipher) { 3177 case WLAN_CIPHER_SUITE_AES_CMAC: 3178 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); 3179 break; 3180 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 3181 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 3182 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); 3183 break; 3184 default: 3185 return -EINVAL; 3186 } 3187 3188 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); 3189 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 3190 igtk_cmd.ctrl_flags |= 3191 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); 3192 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3193 pn = seq.aes_cmac.pn; 3194 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 3195 ((u64) pn[4] << 8) | 3196 ((u64) pn[3] << 16) | 3197 ((u64) pn[2] << 24) | 3198 ((u64) pn[1] << 32) | 3199 ((u64) pn[0] << 40)); 3200 } 3201 3202 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 3203 remove_key ? "removing" : "installing", 3204 igtk_cmd.sta_id); 3205 3206 if (!iwl_mvm_has_new_rx_api(mvm)) { 3207 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { 3208 .ctrl_flags = igtk_cmd.ctrl_flags, 3209 .key_id = igtk_cmd.key_id, 3210 .sta_id = igtk_cmd.sta_id, 3211 .receive_seq_cnt = igtk_cmd.receive_seq_cnt 3212 }; 3213 3214 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, 3215 ARRAY_SIZE(igtk_cmd_v1.igtk)); 3216 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3217 sizeof(igtk_cmd_v1), &igtk_cmd_v1); 3218 } 3219 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 3220 sizeof(igtk_cmd), &igtk_cmd); 3221 } 3222 3223 3224 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 3225 struct ieee80211_vif *vif, 3226 struct ieee80211_sta *sta) 3227 { 3228 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3229 3230 if (sta) 3231 return sta->addr; 3232 3233 if (vif->type == NL80211_IFTYPE_STATION && 3234 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 3235 u8 sta_id = mvmvif->ap_sta_id; 3236 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 3237 lockdep_is_held(&mvm->mutex)); 3238 return sta->addr; 3239 } 3240 3241 3242 return NULL; 3243 } 3244 3245 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3246 struct ieee80211_vif *vif, 3247 struct ieee80211_sta *sta, 3248 struct ieee80211_key_conf *keyconf, 3249 u8 key_offset, 3250 bool mcast) 3251 { 3252 int ret; 3253 const u8 *addr; 3254 struct ieee80211_key_seq seq; 3255 u16 p1k[5]; 3256 u32 sta_id; 3257 3258 if (sta) { 3259 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3260 3261 sta_id = mvm_sta->sta_id; 3262 } else if (vif->type == NL80211_IFTYPE_AP && 3263 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 3264 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3265 3266 sta_id = mvmvif->mcast_sta.sta_id; 3267 } else { 3268 IWL_ERR(mvm, "Failed to find station id\n"); 3269 return -EINVAL; 3270 } 3271 3272 switch (keyconf->cipher) { 3273 case WLAN_CIPHER_SUITE_TKIP: 3274 if (vif->type == NL80211_IFTYPE_AP) { 3275 ret = -EINVAL; 3276 break; 3277 } 3278 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 3279 /* get phase 1 key from mac80211 */ 3280 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 3281 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 3282 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3283 seq.tkip.iv32, p1k, 0, key_offset); 3284 break; 3285 case WLAN_CIPHER_SUITE_CCMP: 3286 case WLAN_CIPHER_SUITE_WEP40: 3287 case WLAN_CIPHER_SUITE_WEP104: 3288 case WLAN_CIPHER_SUITE_GCMP: 3289 case WLAN_CIPHER_SUITE_GCMP_256: 3290 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3291 0, NULL, 0, key_offset); 3292 break; 3293 default: 3294 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast, 3295 0, NULL, 0, key_offset); 3296 } 3297 3298 return ret; 3299 } 3300 3301 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 3302 struct ieee80211_key_conf *keyconf, 3303 bool mcast) 3304 { 3305 union { 3306 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1; 3307 struct iwl_mvm_add_sta_key_cmd cmd; 3308 } u = {}; 3309 bool new_api = fw_has_api(&mvm->fw->ucode_capa, 3310 IWL_UCODE_TLV_API_TKIP_MIC_KEYS); 3311 __le16 key_flags; 3312 int ret, size; 3313 u32 status; 3314 3315 if (sta_id == IWL_MVM_INVALID_STA) 3316 return -EINVAL; 3317 3318 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 3319 STA_KEY_FLG_KEYID_MSK); 3320 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 3321 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 3322 3323 if (mcast) 3324 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 3325 3326 /* 3327 * The fields assigned here are in the same location at the start 3328 * of the command, so we can do this union trick. 3329 */ 3330 u.cmd.common.key_flags = key_flags; 3331 u.cmd.common.key_offset = keyconf->hw_key_idx; 3332 u.cmd.common.sta_id = sta_id; 3333 3334 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1); 3335 3336 status = ADD_STA_SUCCESS; 3337 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd, 3338 &status); 3339 3340 switch (status) { 3341 case ADD_STA_SUCCESS: 3342 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 3343 break; 3344 default: 3345 ret = -EIO; 3346 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 3347 break; 3348 } 3349 3350 return ret; 3351 } 3352 3353 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 3354 struct ieee80211_vif *vif, 3355 struct ieee80211_sta *sta, 3356 struct ieee80211_key_conf *keyconf, 3357 u8 key_offset) 3358 { 3359 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3360 struct iwl_mvm_sta *mvm_sta; 3361 u8 sta_id = IWL_MVM_INVALID_STA; 3362 int ret; 3363 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 3364 3365 lockdep_assert_held(&mvm->mutex); 3366 3367 if (vif->type != NL80211_IFTYPE_AP || 3368 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 3369 /* Get the station id from the mvm local station table */ 3370 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3371 if (!mvm_sta) { 3372 IWL_ERR(mvm, "Failed to find station\n"); 3373 return -EINVAL; 3374 } 3375 sta_id = mvm_sta->sta_id; 3376 3377 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3378 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3379 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { 3380 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, 3381 false); 3382 goto end; 3383 } 3384 3385 /* 3386 * It is possible that the 'sta' parameter is NULL, and thus 3387 * there is a need to retrieve the sta from the local station 3388 * table. 3389 */ 3390 if (!sta) { 3391 sta = rcu_dereference_protected( 3392 mvm->fw_id_to_mac_id[sta_id], 3393 lockdep_is_held(&mvm->mutex)); 3394 if (IS_ERR_OR_NULL(sta)) { 3395 IWL_ERR(mvm, "Invalid station id\n"); 3396 return -EINVAL; 3397 } 3398 } 3399 3400 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 3401 return -EINVAL; 3402 } 3403 3404 /* If the key_offset is not pre-assigned, we need to find a 3405 * new offset to use. In normal cases, the offset is not 3406 * pre-assigned, but during HW_RESTART we want to reuse the 3407 * same indices, so we pass them when this function is called. 3408 * 3409 * In D3 entry, we need to hardcoded the indices (because the 3410 * firmware hardcodes the PTK offset to 0). In this case, we 3411 * need to make sure we don't overwrite the hw_key_idx in the 3412 * keyconf structure, because otherwise we cannot configure 3413 * the original ones back when resuming. 3414 */ 3415 if (key_offset == STA_KEY_IDX_INVALID) { 3416 key_offset = iwl_mvm_set_fw_key_idx(mvm); 3417 if (key_offset == STA_KEY_IDX_INVALID) 3418 return -ENOSPC; 3419 keyconf->hw_key_idx = key_offset; 3420 } 3421 3422 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 3423 if (ret) 3424 goto end; 3425 3426 /* 3427 * For WEP, the same key is used for multicast and unicast. Upload it 3428 * again, using the same key offset, and now pointing the other one 3429 * to the same key slot (offset). 3430 * If this fails, remove the original as well. 3431 */ 3432 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3433 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) && 3434 sta) { 3435 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 3436 key_offset, !mcast); 3437 if (ret) { 3438 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3439 goto end; 3440 } 3441 } 3442 3443 __set_bit(key_offset, mvm->fw_key_table); 3444 3445 end: 3446 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 3447 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 3448 sta ? sta->addr : zero_addr, ret); 3449 return ret; 3450 } 3451 3452 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 3453 struct ieee80211_vif *vif, 3454 struct ieee80211_sta *sta, 3455 struct ieee80211_key_conf *keyconf) 3456 { 3457 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3458 struct iwl_mvm_sta *mvm_sta; 3459 u8 sta_id = IWL_MVM_INVALID_STA; 3460 int ret, i; 3461 3462 lockdep_assert_held(&mvm->mutex); 3463 3464 /* Get the station from the mvm local station table */ 3465 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3466 if (mvm_sta) 3467 sta_id = mvm_sta->sta_id; 3468 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast) 3469 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id; 3470 3471 3472 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 3473 keyconf->keyidx, sta_id); 3474 3475 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 3476 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 3477 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)) 3478 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 3479 3480 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 3481 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 3482 keyconf->hw_key_idx); 3483 return -ENOENT; 3484 } 3485 3486 /* track which key was deleted last */ 3487 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 3488 if (mvm->fw_key_deleted[i] < U8_MAX) 3489 mvm->fw_key_deleted[i]++; 3490 } 3491 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 3492 3493 if (sta && !mvm_sta) { 3494 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 3495 return 0; 3496 } 3497 3498 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 3499 if (ret) 3500 return ret; 3501 3502 /* delete WEP key twice to get rid of (now useless) offset */ 3503 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 3504 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 3505 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 3506 3507 return ret; 3508 } 3509 3510 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 3511 struct ieee80211_vif *vif, 3512 struct ieee80211_key_conf *keyconf, 3513 struct ieee80211_sta *sta, u32 iv32, 3514 u16 *phase1key) 3515 { 3516 struct iwl_mvm_sta *mvm_sta; 3517 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 3518 3519 rcu_read_lock(); 3520 3521 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 3522 if (WARN_ON_ONCE(!mvm_sta)) 3523 goto unlock; 3524 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast, 3525 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 3526 3527 unlock: 3528 rcu_read_unlock(); 3529 } 3530 3531 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 3532 struct ieee80211_sta *sta) 3533 { 3534 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3535 struct iwl_mvm_add_sta_cmd cmd = { 3536 .add_modify = STA_MODE_MODIFY, 3537 .sta_id = mvmsta->sta_id, 3538 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 3539 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3540 }; 3541 int ret; 3542 3543 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3544 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3545 if (ret) 3546 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3547 } 3548 3549 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 3550 struct ieee80211_sta *sta, 3551 enum ieee80211_frame_release_type reason, 3552 u16 cnt, u16 tids, bool more_data, 3553 bool single_sta_queue) 3554 { 3555 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 3556 struct iwl_mvm_add_sta_cmd cmd = { 3557 .add_modify = STA_MODE_MODIFY, 3558 .sta_id = mvmsta->sta_id, 3559 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 3560 .sleep_tx_count = cpu_to_le16(cnt), 3561 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3562 }; 3563 int tid, ret; 3564 unsigned long _tids = tids; 3565 3566 /* convert TIDs to ACs - we don't support TSPEC so that's OK 3567 * Note that this field is reserved and unused by firmware not 3568 * supporting GO uAPSD, so it's safe to always do this. 3569 */ 3570 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 3571 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 3572 3573 /* If we're releasing frames from aggregation or dqa queues then check 3574 * if all the queues that we're releasing frames from, combined, have: 3575 * - more frames than the service period, in which case more_data 3576 * needs to be set 3577 * - fewer than 'cnt' frames, in which case we need to adjust the 3578 * firmware command (but do that unconditionally) 3579 */ 3580 if (single_sta_queue) { 3581 int remaining = cnt; 3582 int sleep_tx_count; 3583 3584 spin_lock_bh(&mvmsta->lock); 3585 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 3586 struct iwl_mvm_tid_data *tid_data; 3587 u16 n_queued; 3588 3589 tid_data = &mvmsta->tid_data[tid]; 3590 if (WARN(!iwl_mvm_is_dqa_supported(mvm) && 3591 tid_data->state != IWL_AGG_ON && 3592 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, 3593 "TID %d state is %d\n", 3594 tid, tid_data->state)) { 3595 spin_unlock_bh(&mvmsta->lock); 3596 ieee80211_sta_eosp(sta); 3597 return; 3598 } 3599 3600 n_queued = iwl_mvm_tid_queued(mvm, tid_data); 3601 if (n_queued > remaining) { 3602 more_data = true; 3603 remaining = 0; 3604 break; 3605 } 3606 remaining -= n_queued; 3607 } 3608 sleep_tx_count = cnt - remaining; 3609 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 3610 mvmsta->sleep_tx_count = sleep_tx_count; 3611 spin_unlock_bh(&mvmsta->lock); 3612 3613 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 3614 if (WARN_ON(cnt - remaining == 0)) { 3615 ieee80211_sta_eosp(sta); 3616 return; 3617 } 3618 } 3619 3620 /* Note: this is ignored by firmware not supporting GO uAPSD */ 3621 if (more_data) 3622 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA; 3623 3624 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 3625 mvmsta->next_status_eosp = true; 3626 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL; 3627 } else { 3628 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD; 3629 } 3630 3631 /* block the Tx queues until the FW updated the sleep Tx count */ 3632 iwl_trans_block_txq_ptrs(mvm->trans, true); 3633 3634 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 3635 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 3636 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3637 if (ret) 3638 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3639 } 3640 3641 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 3642 struct iwl_rx_cmd_buffer *rxb) 3643 { 3644 struct iwl_rx_packet *pkt = rxb_addr(rxb); 3645 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 3646 struct ieee80211_sta *sta; 3647 u32 sta_id = le32_to_cpu(notif->sta_id); 3648 3649 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 3650 return; 3651 3652 rcu_read_lock(); 3653 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 3654 if (!IS_ERR_OR_NULL(sta)) 3655 ieee80211_sta_eosp(sta); 3656 rcu_read_unlock(); 3657 } 3658 3659 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 3660 struct iwl_mvm_sta *mvmsta, bool disable) 3661 { 3662 struct iwl_mvm_add_sta_cmd cmd = { 3663 .add_modify = STA_MODE_MODIFY, 3664 .sta_id = mvmsta->sta_id, 3665 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3666 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3667 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 3668 }; 3669 int ret; 3670 3671 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 3672 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3673 if (ret) 3674 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3675 } 3676 3677 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 3678 struct ieee80211_sta *sta, 3679 bool disable) 3680 { 3681 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3682 3683 spin_lock_bh(&mvm_sta->lock); 3684 3685 if (mvm_sta->disable_tx == disable) { 3686 spin_unlock_bh(&mvm_sta->lock); 3687 return; 3688 } 3689 3690 mvm_sta->disable_tx = disable; 3691 3692 /* 3693 * Tell mac80211 to start/stop queuing tx for this station, 3694 * but don't stop queuing if there are still pending frames 3695 * for this station. 3696 */ 3697 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) 3698 ieee80211_sta_block_awake(mvm->hw, sta, disable); 3699 3700 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 3701 3702 spin_unlock_bh(&mvm_sta->lock); 3703 } 3704 3705 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm, 3706 struct iwl_mvm_vif *mvmvif, 3707 struct iwl_mvm_int_sta *sta, 3708 bool disable) 3709 { 3710 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); 3711 struct iwl_mvm_add_sta_cmd cmd = { 3712 .add_modify = STA_MODE_MODIFY, 3713 .sta_id = sta->sta_id, 3714 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 3715 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 3716 .mac_id_n_color = cpu_to_le32(id), 3717 }; 3718 int ret; 3719 3720 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0, 3721 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 3722 if (ret) 3723 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 3724 } 3725 3726 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 3727 struct iwl_mvm_vif *mvmvif, 3728 bool disable) 3729 { 3730 struct ieee80211_sta *sta; 3731 struct iwl_mvm_sta *mvm_sta; 3732 int i; 3733 3734 lockdep_assert_held(&mvm->mutex); 3735 3736 /* Block/unblock all the stations of the given mvmvif */ 3737 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 3738 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 3739 lockdep_is_held(&mvm->mutex)); 3740 if (IS_ERR_OR_NULL(sta)) 3741 continue; 3742 3743 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3744 if (mvm_sta->mac_id_n_color != 3745 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 3746 continue; 3747 3748 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 3749 } 3750 3751 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 3752 return; 3753 3754 /* Need to block/unblock also multicast station */ 3755 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA) 3756 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3757 &mvmvif->mcast_sta, disable); 3758 3759 /* 3760 * Only unblock the broadcast station (FW blocks it for immediate 3761 * quiet, not the driver) 3762 */ 3763 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA) 3764 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif, 3765 &mvmvif->bcast_sta, disable); 3766 } 3767 3768 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 3769 { 3770 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3771 struct iwl_mvm_sta *mvmsta; 3772 3773 rcu_read_lock(); 3774 3775 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 3776 3777 if (!WARN_ON(!mvmsta)) 3778 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 3779 3780 rcu_read_unlock(); 3781 } 3782 3783 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data) 3784 { 3785 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 3786 3787 /* 3788 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 3789 * to align the wrap around of ssn so we compare relevant values. 3790 */ 3791 if (mvm->trans->cfg->gen2) 3792 sn &= 0xff; 3793 3794 return ieee80211_sn_sub(sn, tid_data->next_reclaimed); 3795 } 3796