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 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 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 return iwl_mvm_has_new_rx_api(mvm) ? 81 sizeof(struct iwl_mvm_add_sta_cmd) : 82 sizeof(struct iwl_mvm_add_sta_cmd_v7); 83 } 84 85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, 86 enum nl80211_iftype iftype) 87 { 88 int sta_id; 89 u32 reserved_ids = 0; 90 91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); 92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); 93 94 lockdep_assert_held(&mvm->mutex); 95 96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ 97 if (iftype != NL80211_IFTYPE_STATION) 98 reserved_ids = BIT(0); 99 100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ 101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { 102 if (BIT(sta_id) & reserved_ids) 103 continue; 104 105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 106 lockdep_is_held(&mvm->mutex))) 107 return sta_id; 108 } 109 return IWL_MVM_STATION_COUNT; 110 } 111 112 /* send station add/update command to firmware */ 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 114 bool update) 115 { 116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 117 struct iwl_mvm_add_sta_cmd add_sta_cmd = { 118 .sta_id = mvm_sta->sta_id, 119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), 120 .add_modify = update ? 1 : 0, 121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | 122 STA_FLG_MIMO_EN_MSK), 123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), 124 }; 125 int ret; 126 u32 status; 127 u32 agg_size = 0, mpdu_dens = 0; 128 129 if (!update) { 130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); 132 } 133 134 switch (sta->bandwidth) { 135 case IEEE80211_STA_RX_BW_160: 136 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); 137 /* fall through */ 138 case IEEE80211_STA_RX_BW_80: 139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); 140 /* fall through */ 141 case IEEE80211_STA_RX_BW_40: 142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); 143 /* fall through */ 144 case IEEE80211_STA_RX_BW_20: 145 if (sta->ht_cap.ht_supported) 146 add_sta_cmd.station_flags |= 147 cpu_to_le32(STA_FLG_FAT_EN_20MHZ); 148 break; 149 } 150 151 switch (sta->rx_nss) { 152 case 1: 153 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 154 break; 155 case 2: 156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); 157 break; 158 case 3 ... 8: 159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); 160 break; 161 } 162 163 switch (sta->smps_mode) { 164 case IEEE80211_SMPS_AUTOMATIC: 165 case IEEE80211_SMPS_NUM_MODES: 166 WARN_ON(1); 167 break; 168 case IEEE80211_SMPS_STATIC: 169 /* override NSS */ 170 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); 171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); 172 break; 173 case IEEE80211_SMPS_DYNAMIC: 174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); 175 break; 176 case IEEE80211_SMPS_OFF: 177 /* nothing */ 178 break; 179 } 180 181 if (sta->ht_cap.ht_supported) { 182 add_sta_cmd.station_flags_msk |= 183 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | 184 STA_FLG_AGG_MPDU_DENS_MSK); 185 186 mpdu_dens = sta->ht_cap.ampdu_density; 187 } 188 189 if (sta->vht_cap.vht_supported) { 190 agg_size = sta->vht_cap.cap & 191 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; 192 agg_size >>= 193 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; 194 } else if (sta->ht_cap.ht_supported) { 195 agg_size = sta->ht_cap.ampdu_factor; 196 } 197 198 add_sta_cmd.station_flags |= 199 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); 200 add_sta_cmd.station_flags |= 201 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); 202 203 status = ADD_STA_SUCCESS; 204 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 205 iwl_mvm_add_sta_cmd_size(mvm), 206 &add_sta_cmd, &status); 207 if (ret) 208 return ret; 209 210 switch (status & IWL_ADD_STA_STATUS_MASK) { 211 case ADD_STA_SUCCESS: 212 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); 213 break; 214 default: 215 ret = -EIO; 216 IWL_ERR(mvm, "ADD_STA failed\n"); 217 break; 218 } 219 220 return ret; 221 } 222 223 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, 224 struct ieee80211_sta *sta) 225 { 226 unsigned long used_hw_queues; 227 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 228 unsigned int wdg_timeout = 229 iwl_mvm_get_wd_timeout(mvm, NULL, true, false); 230 u32 ac; 231 232 lockdep_assert_held(&mvm->mutex); 233 234 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); 235 236 /* Find available queues, and allocate them to the ACs */ 237 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 238 u8 queue = find_first_zero_bit(&used_hw_queues, 239 mvm->first_agg_queue); 240 241 if (queue >= mvm->first_agg_queue) { 242 IWL_ERR(mvm, "Failed to allocate STA queue\n"); 243 return -EBUSY; 244 } 245 246 __set_bit(queue, &used_hw_queues); 247 mvmsta->hw_queue[ac] = queue; 248 } 249 250 /* Found a place for all queues - enable them */ 251 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 252 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], 253 mvmsta->hw_queue[ac], 254 iwl_mvm_ac_to_tx_fifo[ac], 0, 255 wdg_timeout); 256 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); 257 } 258 259 return 0; 260 } 261 262 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, 263 struct ieee80211_sta *sta) 264 { 265 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 266 unsigned long sta_msk; 267 int i; 268 269 lockdep_assert_held(&mvm->mutex); 270 271 /* disable the TDLS STA-specific queues */ 272 sta_msk = mvmsta->tfd_queue_msk; 273 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) 274 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); 275 } 276 277 int iwl_mvm_add_sta(struct iwl_mvm *mvm, 278 struct ieee80211_vif *vif, 279 struct ieee80211_sta *sta) 280 { 281 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 282 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 283 struct iwl_mvm_rxq_dup_data *dup_data; 284 int i, ret, sta_id; 285 286 lockdep_assert_held(&mvm->mutex); 287 288 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 289 sta_id = iwl_mvm_find_free_sta_id(mvm, 290 ieee80211_vif_type_p2p(vif)); 291 else 292 sta_id = mvm_sta->sta_id; 293 294 if (sta_id == IWL_MVM_STATION_COUNT) 295 return -ENOSPC; 296 297 spin_lock_init(&mvm_sta->lock); 298 299 mvm_sta->sta_id = sta_id; 300 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, 301 mvmvif->color); 302 mvm_sta->vif = vif; 303 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 304 mvm_sta->tx_protection = 0; 305 mvm_sta->tt_tx_protection = false; 306 307 /* HW restart, don't assume the memory has been zeroed */ 308 atomic_set(&mvm->pending_frames[sta_id], 0); 309 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ 310 mvm_sta->tfd_queue_msk = 0; 311 312 /* allocate new queues for a TDLS station */ 313 if (sta->tdls) { 314 ret = iwl_mvm_tdls_sta_init(mvm, sta); 315 if (ret) 316 return ret; 317 } else { 318 for (i = 0; i < IEEE80211_NUM_ACS; i++) 319 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 320 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); 321 } 322 323 /* for HW restart - reset everything but the sequence number */ 324 for (i = 0; i < IWL_MAX_TID_COUNT; i++) { 325 u16 seq = mvm_sta->tid_data[i].seq_number; 326 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); 327 mvm_sta->tid_data[i].seq_number = seq; 328 } 329 mvm_sta->agg_tids = 0; 330 331 if (iwl_mvm_has_new_rx_api(mvm) && 332 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 333 dup_data = kcalloc(mvm->trans->num_rx_queues, 334 sizeof(*dup_data), 335 GFP_KERNEL); 336 if (!dup_data) 337 return -ENOMEM; 338 mvm_sta->dup_data = dup_data; 339 } 340 341 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false); 342 if (ret) 343 goto err; 344 345 if (vif->type == NL80211_IFTYPE_STATION) { 346 if (!sta->tdls) { 347 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); 348 mvmvif->ap_sta_id = sta_id; 349 } else { 350 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); 351 } 352 } 353 354 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); 355 356 return 0; 357 358 err: 359 iwl_mvm_tdls_sta_deinit(mvm, sta); 360 return ret; 361 } 362 363 int iwl_mvm_update_sta(struct iwl_mvm *mvm, 364 struct ieee80211_vif *vif, 365 struct ieee80211_sta *sta) 366 { 367 return iwl_mvm_sta_send_to_fw(mvm, sta, true); 368 } 369 370 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 371 bool drain) 372 { 373 struct iwl_mvm_add_sta_cmd cmd = {}; 374 int ret; 375 u32 status; 376 377 lockdep_assert_held(&mvm->mutex); 378 379 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); 380 cmd.sta_id = mvmsta->sta_id; 381 cmd.add_modify = STA_MODE_MODIFY; 382 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; 383 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); 384 385 status = ADD_STA_SUCCESS; 386 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 387 iwl_mvm_add_sta_cmd_size(mvm), 388 &cmd, &status); 389 if (ret) 390 return ret; 391 392 switch (status & IWL_ADD_STA_STATUS_MASK) { 393 case ADD_STA_SUCCESS: 394 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", 395 mvmsta->sta_id); 396 break; 397 default: 398 ret = -EIO; 399 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", 400 mvmsta->sta_id); 401 break; 402 } 403 404 return ret; 405 } 406 407 /* 408 * Remove a station from the FW table. Before sending the command to remove 409 * the station validate that the station is indeed known to the driver (sanity 410 * only). 411 */ 412 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) 413 { 414 struct ieee80211_sta *sta; 415 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { 416 .sta_id = sta_id, 417 }; 418 int ret; 419 420 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 421 lockdep_is_held(&mvm->mutex)); 422 423 /* Note: internal stations are marked as error values */ 424 if (!sta) { 425 IWL_ERR(mvm, "Invalid station id\n"); 426 return -EINVAL; 427 } 428 429 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, 430 sizeof(rm_sta_cmd), &rm_sta_cmd); 431 if (ret) { 432 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); 433 return ret; 434 } 435 436 return 0; 437 } 438 439 void iwl_mvm_sta_drained_wk(struct work_struct *wk) 440 { 441 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); 442 u8 sta_id; 443 444 /* 445 * The mutex is needed because of the SYNC cmd, but not only: if the 446 * work would run concurrently with iwl_mvm_rm_sta, it would run before 447 * iwl_mvm_rm_sta sets the station as busy, and exit. Then 448 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean 449 * that later. 450 */ 451 mutex_lock(&mvm->mutex); 452 453 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { 454 int ret; 455 struct ieee80211_sta *sta = 456 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 457 lockdep_is_held(&mvm->mutex)); 458 459 /* 460 * This station is in use or RCU-removed; the latter happens in 461 * managed mode, where mac80211 removes the station before we 462 * can remove it from firmware (we can only do that after the 463 * MAC is marked unassociated), and possibly while the deauth 464 * frame to disconnect from the AP is still queued. Then, the 465 * station pointer is -ENOENT when the last skb is reclaimed. 466 */ 467 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) 468 continue; 469 470 if (PTR_ERR(sta) == -EINVAL) { 471 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", 472 sta_id); 473 continue; 474 } 475 476 if (!sta) { 477 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", 478 sta_id); 479 continue; 480 } 481 482 WARN_ON(PTR_ERR(sta) != -EBUSY); 483 /* This station was removed and we waited until it got drained, 484 * we can now proceed and remove it. 485 */ 486 ret = iwl_mvm_rm_sta_common(mvm, sta_id); 487 if (ret) { 488 IWL_ERR(mvm, 489 "Couldn't remove sta %d after it was drained\n", 490 sta_id); 491 continue; 492 } 493 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 494 clear_bit(sta_id, mvm->sta_drained); 495 496 if (mvm->tfd_drained[sta_id]) { 497 unsigned long i, msk = mvm->tfd_drained[sta_id]; 498 499 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) 500 iwl_mvm_disable_txq(mvm, i, i, 501 IWL_MAX_TID_COUNT, 0); 502 503 mvm->tfd_drained[sta_id] = 0; 504 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", 505 sta_id, msk); 506 } 507 } 508 509 mutex_unlock(&mvm->mutex); 510 } 511 512 int iwl_mvm_rm_sta(struct iwl_mvm *mvm, 513 struct ieee80211_vif *vif, 514 struct ieee80211_sta *sta) 515 { 516 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 517 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 518 int ret; 519 520 lockdep_assert_held(&mvm->mutex); 521 522 if (iwl_mvm_has_new_rx_api(mvm)) 523 kfree(mvm_sta->dup_data); 524 525 if (vif->type == NL80211_IFTYPE_STATION && 526 mvmvif->ap_sta_id == mvm_sta->sta_id) { 527 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 528 if (ret) 529 return ret; 530 /* flush its queues here since we are freeing mvm_sta */ 531 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); 532 if (ret) 533 return ret; 534 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, 535 mvm_sta->tfd_queue_msk); 536 if (ret) 537 return ret; 538 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); 539 540 /* if we are associated - we can't remove the AP STA now */ 541 if (vif->bss_conf.assoc) 542 return ret; 543 544 /* unassoc - go ahead - remove the AP STA now */ 545 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 546 547 /* clear d0i3_ap_sta_id if no longer relevant */ 548 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id) 549 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; 550 } 551 552 /* 553 * This shouldn't happen - the TDLS channel switch should be canceled 554 * before the STA is removed. 555 */ 556 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) { 557 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; 558 cancel_delayed_work(&mvm->tdls_cs.dwork); 559 } 560 561 /* 562 * Make sure that the tx response code sees the station as -EBUSY and 563 * calls the drain worker. 564 */ 565 spin_lock_bh(&mvm_sta->lock); 566 /* 567 * There are frames pending on the AC queues for this station. 568 * We need to wait until all the frames are drained... 569 */ 570 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { 571 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], 572 ERR_PTR(-EBUSY)); 573 spin_unlock_bh(&mvm_sta->lock); 574 575 /* disable TDLS sta queues on drain complete */ 576 if (sta->tdls) { 577 mvm->tfd_drained[mvm_sta->sta_id] = 578 mvm_sta->tfd_queue_msk; 579 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", 580 mvm_sta->sta_id); 581 } 582 583 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); 584 } else { 585 spin_unlock_bh(&mvm_sta->lock); 586 587 if (sta->tdls) 588 iwl_mvm_tdls_sta_deinit(mvm, sta); 589 590 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); 591 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); 592 } 593 594 return ret; 595 } 596 597 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, 598 struct ieee80211_vif *vif, 599 u8 sta_id) 600 { 601 int ret = iwl_mvm_rm_sta_common(mvm, sta_id); 602 603 lockdep_assert_held(&mvm->mutex); 604 605 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); 606 return ret; 607 } 608 609 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, 610 struct iwl_mvm_int_sta *sta, 611 u32 qmask, enum nl80211_iftype iftype) 612 { 613 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 614 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); 615 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) 616 return -ENOSPC; 617 } 618 619 sta->tfd_queue_msk = qmask; 620 621 /* put a non-NULL value so iterating over the stations won't stop */ 622 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); 623 return 0; 624 } 625 626 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, 627 struct iwl_mvm_int_sta *sta) 628 { 629 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); 630 memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); 631 sta->sta_id = IWL_MVM_STATION_COUNT; 632 } 633 634 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, 635 struct iwl_mvm_int_sta *sta, 636 const u8 *addr, 637 u16 mac_id, u16 color) 638 { 639 struct iwl_mvm_add_sta_cmd cmd; 640 int ret; 641 u32 status; 642 643 lockdep_assert_held(&mvm->mutex); 644 645 memset(&cmd, 0, sizeof(cmd)); 646 cmd.sta_id = sta->sta_id; 647 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, 648 color)); 649 650 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); 651 cmd.tid_disable_tx = cpu_to_le16(0xffff); 652 653 if (addr) 654 memcpy(cmd.addr, addr, ETH_ALEN); 655 656 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 657 iwl_mvm_add_sta_cmd_size(mvm), 658 &cmd, &status); 659 if (ret) 660 return ret; 661 662 switch (status & IWL_ADD_STA_STATUS_MASK) { 663 case ADD_STA_SUCCESS: 664 IWL_DEBUG_INFO(mvm, "Internal station added.\n"); 665 return 0; 666 default: 667 ret = -EIO; 668 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", 669 status); 670 break; 671 } 672 return ret; 673 } 674 675 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) 676 { 677 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? 678 mvm->cfg->base_params->wd_timeout : 679 IWL_WATCHDOG_DISABLED; 680 int ret; 681 682 lockdep_assert_held(&mvm->mutex); 683 684 /* Map Aux queue to fifo - needs to happen before adding Aux station */ 685 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, 686 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 687 688 /* Allocate aux station and assign to it the aux queue */ 689 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), 690 NL80211_IFTYPE_UNSPECIFIED); 691 if (ret) 692 return ret; 693 694 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, 695 MAC_INDEX_AUX, 0); 696 697 if (ret) 698 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 699 return ret; 700 } 701 702 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 703 { 704 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 705 706 lockdep_assert_held(&mvm->mutex); 707 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, 708 mvmvif->id, 0); 709 } 710 711 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 712 { 713 int ret; 714 715 lockdep_assert_held(&mvm->mutex); 716 717 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); 718 if (ret) 719 IWL_WARN(mvm, "Failed sending remove station\n"); 720 721 return ret; 722 } 723 724 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) 725 { 726 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); 727 } 728 729 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) 730 { 731 lockdep_assert_held(&mvm->mutex); 732 733 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); 734 } 735 736 /* 737 * Send the add station command for the vif's broadcast station. 738 * Assumes that the station was already allocated. 739 * 740 * @mvm: the mvm component 741 * @vif: the interface to which the broadcast station is added 742 * @bsta: the broadcast station to add. 743 */ 744 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 745 { 746 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 747 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 748 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 749 const u8 *baddr = _baddr; 750 751 lockdep_assert_held(&mvm->mutex); 752 753 if (vif->type == NL80211_IFTYPE_ADHOC) 754 baddr = vif->bss_conf.bssid; 755 756 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) 757 return -ENOSPC; 758 759 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, 760 mvmvif->id, mvmvif->color); 761 } 762 763 /* Send the FW a request to remove the station from it's internal data 764 * structures, but DO NOT remove the entry from the local data structures. */ 765 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 766 { 767 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 768 int ret; 769 770 lockdep_assert_held(&mvm->mutex); 771 772 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); 773 if (ret) 774 IWL_WARN(mvm, "Failed sending remove station\n"); 775 return ret; 776 } 777 778 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 779 { 780 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 781 u32 qmask; 782 783 lockdep_assert_held(&mvm->mutex); 784 785 qmask = iwl_mvm_mac_get_queues_mask(vif); 786 787 /* 788 * The firmware defines the TFD queue mask to only be relevant 789 * for *unicast* queues, so the multicast (CAB) queue shouldn't 790 * be included. 791 */ 792 if (vif->type == NL80211_IFTYPE_AP) 793 qmask &= ~BIT(vif->cab_queue); 794 795 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, 796 ieee80211_vif_type_p2p(vif)); 797 } 798 799 /* Allocate a new station entry for the broadcast station to the given vif, 800 * and send it to the FW. 801 * Note that each P2P mac should have its own broadcast station. 802 * 803 * @mvm: the mvm component 804 * @vif: the interface to which the broadcast station is added 805 * @bsta: the broadcast station to add. */ 806 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 807 { 808 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 809 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; 810 int ret; 811 812 lockdep_assert_held(&mvm->mutex); 813 814 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 815 if (ret) 816 return ret; 817 818 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 819 820 if (ret) 821 iwl_mvm_dealloc_int_sta(mvm, bsta); 822 823 return ret; 824 } 825 826 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 827 { 828 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 829 830 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); 831 } 832 833 /* 834 * Send the FW a request to remove the station from it's internal data 835 * structures, and in addition remove it from the local data structure. 836 */ 837 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 838 { 839 int ret; 840 841 lockdep_assert_held(&mvm->mutex); 842 843 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); 844 845 iwl_mvm_dealloc_bcast_sta(mvm, vif); 846 847 return ret; 848 } 849 850 #define IWL_MAX_RX_BA_SESSIONS 16 851 852 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 853 int tid, u16 ssn, bool start, u8 buf_size) 854 { 855 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 856 struct iwl_mvm_add_sta_cmd cmd = {}; 857 int ret; 858 u32 status; 859 860 lockdep_assert_held(&mvm->mutex); 861 862 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { 863 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); 864 return -ENOSPC; 865 } 866 867 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 868 cmd.sta_id = mvm_sta->sta_id; 869 cmd.add_modify = STA_MODE_MODIFY; 870 if (start) { 871 cmd.add_immediate_ba_tid = (u8) tid; 872 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 873 cmd.rx_ba_window = cpu_to_le16((u16)buf_size); 874 } else { 875 cmd.remove_immediate_ba_tid = (u8) tid; 876 } 877 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : 878 STA_MODIFY_REMOVE_BA_TID; 879 880 status = ADD_STA_SUCCESS; 881 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 882 iwl_mvm_add_sta_cmd_size(mvm), 883 &cmd, &status); 884 if (ret) 885 return ret; 886 887 switch (status & IWL_ADD_STA_STATUS_MASK) { 888 case ADD_STA_SUCCESS: 889 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n", 890 start ? "start" : "stopp"); 891 break; 892 case ADD_STA_IMMEDIATE_BA_FAILURE: 893 IWL_WARN(mvm, "RX BA Session refused by fw\n"); 894 ret = -ENOSPC; 895 break; 896 default: 897 ret = -EIO; 898 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", 899 start ? "start" : "stopp", status); 900 break; 901 } 902 903 if (!ret) { 904 if (start) 905 mvm->rx_ba_sessions++; 906 else if (mvm->rx_ba_sessions > 0) 907 /* check that restart flow didn't zero the counter */ 908 mvm->rx_ba_sessions--; 909 } 910 911 return ret; 912 } 913 914 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 915 int tid, u8 queue, bool start) 916 { 917 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 918 struct iwl_mvm_add_sta_cmd cmd = {}; 919 int ret; 920 u32 status; 921 922 lockdep_assert_held(&mvm->mutex); 923 924 if (start) { 925 mvm_sta->tfd_queue_msk |= BIT(queue); 926 mvm_sta->tid_disable_agg &= ~BIT(tid); 927 } else { 928 mvm_sta->tfd_queue_msk &= ~BIT(queue); 929 mvm_sta->tid_disable_agg |= BIT(tid); 930 } 931 932 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); 933 cmd.sta_id = mvm_sta->sta_id; 934 cmd.add_modify = STA_MODE_MODIFY; 935 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; 936 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); 937 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); 938 939 status = ADD_STA_SUCCESS; 940 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 941 iwl_mvm_add_sta_cmd_size(mvm), 942 &cmd, &status); 943 if (ret) 944 return ret; 945 946 switch (status & IWL_ADD_STA_STATUS_MASK) { 947 case ADD_STA_SUCCESS: 948 break; 949 default: 950 ret = -EIO; 951 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", 952 start ? "start" : "stopp", status); 953 break; 954 } 955 956 return ret; 957 } 958 959 const u8 tid_to_mac80211_ac[] = { 960 IEEE80211_AC_BE, 961 IEEE80211_AC_BK, 962 IEEE80211_AC_BK, 963 IEEE80211_AC_BE, 964 IEEE80211_AC_VI, 965 IEEE80211_AC_VI, 966 IEEE80211_AC_VO, 967 IEEE80211_AC_VO, 968 }; 969 970 static const u8 tid_to_ucode_ac[] = { 971 AC_BE, 972 AC_BK, 973 AC_BK, 974 AC_BE, 975 AC_VI, 976 AC_VI, 977 AC_VO, 978 AC_VO, 979 }; 980 981 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 982 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 983 { 984 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 985 struct iwl_mvm_tid_data *tid_data; 986 int txq_id; 987 int ret; 988 989 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 990 return -EINVAL; 991 992 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { 993 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", 994 mvmsta->tid_data[tid].state); 995 return -ENXIO; 996 } 997 998 lockdep_assert_held(&mvm->mutex); 999 1000 spin_lock_bh(&mvmsta->lock); 1001 1002 /* possible race condition - we entered D0i3 while starting agg */ 1003 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { 1004 spin_unlock_bh(&mvmsta->lock); 1005 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); 1006 return -EIO; 1007 } 1008 1009 spin_lock_bh(&mvm->queue_info_lock); 1010 1011 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue, 1012 mvm->last_agg_queue); 1013 if (txq_id < 0) { 1014 ret = txq_id; 1015 spin_unlock_bh(&mvm->queue_info_lock); 1016 IWL_ERR(mvm, "Failed to allocate agg queue\n"); 1017 goto release_locks; 1018 } 1019 mvm->queue_info[txq_id].setup_reserved = true; 1020 spin_unlock_bh(&mvm->queue_info_lock); 1021 1022 tid_data = &mvmsta->tid_data[tid]; 1023 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1024 tid_data->txq_id = txq_id; 1025 *ssn = tid_data->ssn; 1026 1027 IWL_DEBUG_TX_QUEUES(mvm, 1028 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", 1029 mvmsta->sta_id, tid, txq_id, tid_data->ssn, 1030 tid_data->next_reclaimed); 1031 1032 if (tid_data->ssn == tid_data->next_reclaimed) { 1033 tid_data->state = IWL_AGG_STARTING; 1034 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1035 } else { 1036 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; 1037 } 1038 1039 ret = 0; 1040 1041 release_locks: 1042 spin_unlock_bh(&mvmsta->lock); 1043 1044 return ret; 1045 } 1046 1047 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1048 struct ieee80211_sta *sta, u16 tid, u8 buf_size, 1049 bool amsdu) 1050 { 1051 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1052 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1053 unsigned int wdg_timeout = 1054 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); 1055 int queue, ret; 1056 u16 ssn; 1057 1058 struct iwl_trans_txq_scd_cfg cfg = { 1059 .sta_id = mvmsta->sta_id, 1060 .tid = tid, 1061 .frame_limit = buf_size, 1062 .aggregate = true, 1063 }; 1064 1065 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) 1066 != IWL_MAX_TID_COUNT); 1067 1068 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 1069 1070 spin_lock_bh(&mvmsta->lock); 1071 ssn = tid_data->ssn; 1072 queue = tid_data->txq_id; 1073 tid_data->state = IWL_AGG_ON; 1074 mvmsta->agg_tids |= BIT(tid); 1075 tid_data->ssn = 0xffff; 1076 tid_data->amsdu_in_ampdu_allowed = amsdu; 1077 spin_unlock_bh(&mvmsta->lock); 1078 1079 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 1080 1081 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[tid_to_mac80211_ac[tid]], 1082 ssn, &cfg, wdg_timeout); 1083 1084 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); 1085 if (ret) 1086 return -EIO; 1087 1088 /* No need to mark as reserved */ 1089 spin_lock_bh(&mvm->queue_info_lock); 1090 mvm->queue_info[queue].setup_reserved = false; 1091 spin_unlock_bh(&mvm->queue_info_lock); 1092 1093 /* 1094 * Even though in theory the peer could have different 1095 * aggregation reorder buffer sizes for different sessions, 1096 * our ucode doesn't allow for that and has a global limit 1097 * for each station. Therefore, use the minimum of all the 1098 * aggregation sessions and our default value. 1099 */ 1100 mvmsta->max_agg_bufsize = 1101 min(mvmsta->max_agg_bufsize, buf_size); 1102 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; 1103 1104 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", 1105 sta->addr, tid); 1106 1107 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); 1108 } 1109 1110 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1111 struct ieee80211_sta *sta, u16 tid) 1112 { 1113 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1114 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1115 u16 txq_id; 1116 int err; 1117 1118 1119 /* 1120 * If mac80211 is cleaning its state, then say that we finished since 1121 * our state has been cleared anyway. 1122 */ 1123 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1124 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1125 return 0; 1126 } 1127 1128 spin_lock_bh(&mvmsta->lock); 1129 1130 txq_id = tid_data->txq_id; 1131 1132 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", 1133 mvmsta->sta_id, tid, txq_id, tid_data->state); 1134 1135 mvmsta->agg_tids &= ~BIT(tid); 1136 1137 /* No need to mark as reserved anymore */ 1138 spin_lock_bh(&mvm->queue_info_lock); 1139 mvm->queue_info[txq_id].setup_reserved = false; 1140 spin_unlock_bh(&mvm->queue_info_lock); 1141 1142 switch (tid_data->state) { 1143 case IWL_AGG_ON: 1144 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 1145 1146 IWL_DEBUG_TX_QUEUES(mvm, 1147 "ssn = %d, next_recl = %d\n", 1148 tid_data->ssn, tid_data->next_reclaimed); 1149 1150 /* There are still packets for this RA / TID in the HW */ 1151 if (tid_data->ssn != tid_data->next_reclaimed) { 1152 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; 1153 err = 0; 1154 break; 1155 } 1156 1157 tid_data->ssn = 0xffff; 1158 tid_data->state = IWL_AGG_OFF; 1159 spin_unlock_bh(&mvmsta->lock); 1160 1161 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1162 1163 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 1164 1165 iwl_mvm_disable_txq(mvm, txq_id, 1166 vif->hw_queue[tid_to_mac80211_ac[tid]], tid, 1167 0); 1168 return 0; 1169 case IWL_AGG_STARTING: 1170 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1171 /* 1172 * The agg session has been stopped before it was set up. This 1173 * can happen when the AddBA timer times out for example. 1174 */ 1175 1176 /* No barriers since we are under mutex */ 1177 lockdep_assert_held(&mvm->mutex); 1178 1179 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1180 tid_data->state = IWL_AGG_OFF; 1181 err = 0; 1182 break; 1183 default: 1184 IWL_ERR(mvm, 1185 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 1186 mvmsta->sta_id, tid, tid_data->state); 1187 IWL_ERR(mvm, 1188 "\ttid_data->txq_id = %d\n", tid_data->txq_id); 1189 err = -EINVAL; 1190 } 1191 1192 spin_unlock_bh(&mvmsta->lock); 1193 1194 return err; 1195 } 1196 1197 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1198 struct ieee80211_sta *sta, u16 tid) 1199 { 1200 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1201 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1202 u16 txq_id; 1203 enum iwl_mvm_agg_state old_state; 1204 1205 /* 1206 * First set the agg state to OFF to avoid calling 1207 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. 1208 */ 1209 spin_lock_bh(&mvmsta->lock); 1210 txq_id = tid_data->txq_id; 1211 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", 1212 mvmsta->sta_id, tid, txq_id, tid_data->state); 1213 old_state = tid_data->state; 1214 tid_data->state = IWL_AGG_OFF; 1215 mvmsta->agg_tids &= ~BIT(tid); 1216 spin_unlock_bh(&mvmsta->lock); 1217 1218 /* No need to mark as reserved */ 1219 spin_lock_bh(&mvm->queue_info_lock); 1220 mvm->queue_info[txq_id].setup_reserved = false; 1221 spin_unlock_bh(&mvm->queue_info_lock); 1222 1223 if (old_state >= IWL_AGG_ON) { 1224 iwl_mvm_drain_sta(mvm, mvmsta, true); 1225 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) 1226 IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); 1227 iwl_trans_wait_tx_queue_empty(mvm->trans, 1228 mvmsta->tfd_queue_msk); 1229 iwl_mvm_drain_sta(mvm, mvmsta, false); 1230 1231 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); 1232 1233 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1234 vif->hw_queue[tid_to_mac80211_ac[tid]], tid, 1235 0); 1236 } 1237 1238 return 0; 1239 } 1240 1241 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) 1242 { 1243 int i, max = -1, max_offs = -1; 1244 1245 lockdep_assert_held(&mvm->mutex); 1246 1247 /* Pick the unused key offset with the highest 'deleted' 1248 * counter. Every time a key is deleted, all the counters 1249 * are incremented and the one that was just deleted is 1250 * reset to zero. Thus, the highest counter is the one 1251 * that was deleted longest ago. Pick that one. 1252 */ 1253 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 1254 if (test_bit(i, mvm->fw_key_table)) 1255 continue; 1256 if (mvm->fw_key_deleted[i] > max) { 1257 max = mvm->fw_key_deleted[i]; 1258 max_offs = i; 1259 } 1260 } 1261 1262 if (max_offs < 0) 1263 return STA_KEY_IDX_INVALID; 1264 1265 return max_offs; 1266 } 1267 1268 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, 1269 struct ieee80211_vif *vif, 1270 struct ieee80211_sta *sta) 1271 { 1272 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1273 1274 if (sta) 1275 return iwl_mvm_sta_from_mac80211(sta); 1276 1277 /* 1278 * The device expects GTKs for station interfaces to be 1279 * installed as GTKs for the AP station. If we have no 1280 * station ID, then use AP's station ID. 1281 */ 1282 if (vif->type == NL80211_IFTYPE_STATION && 1283 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 1284 u8 sta_id = mvmvif->ap_sta_id; 1285 1286 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], 1287 lockdep_is_held(&mvm->mutex)); 1288 /* 1289 * It is possible that the 'sta' parameter is NULL, 1290 * for example when a GTK is removed - the sta_id will then 1291 * be the AP ID, and no station was passed by mac80211. 1292 */ 1293 if (IS_ERR_OR_NULL(sta)) 1294 return NULL; 1295 1296 return iwl_mvm_sta_from_mac80211(sta); 1297 } 1298 1299 return NULL; 1300 } 1301 1302 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, 1303 struct iwl_mvm_sta *mvm_sta, 1304 struct ieee80211_key_conf *keyconf, bool mcast, 1305 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, 1306 u8 key_offset) 1307 { 1308 struct iwl_mvm_add_sta_key_cmd cmd = {}; 1309 __le16 key_flags; 1310 int ret; 1311 u32 status; 1312 u16 keyidx; 1313 int i; 1314 u8 sta_id = mvm_sta->sta_id; 1315 1316 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 1317 STA_KEY_FLG_KEYID_MSK; 1318 key_flags = cpu_to_le16(keyidx); 1319 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); 1320 1321 switch (keyconf->cipher) { 1322 case WLAN_CIPHER_SUITE_TKIP: 1323 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); 1324 cmd.tkip_rx_tsc_byte2 = tkip_iv32; 1325 for (i = 0; i < 5; i++) 1326 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); 1327 memcpy(cmd.key, keyconf->key, keyconf->keylen); 1328 break; 1329 case WLAN_CIPHER_SUITE_CCMP: 1330 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); 1331 memcpy(cmd.key, keyconf->key, keyconf->keylen); 1332 break; 1333 case WLAN_CIPHER_SUITE_WEP104: 1334 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); 1335 /* fall through */ 1336 case WLAN_CIPHER_SUITE_WEP40: 1337 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); 1338 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); 1339 break; 1340 default: 1341 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); 1342 memcpy(cmd.key, keyconf->key, keyconf->keylen); 1343 } 1344 1345 if (mcast) 1346 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 1347 1348 cmd.key_offset = key_offset; 1349 cmd.key_flags = key_flags; 1350 cmd.sta_id = sta_id; 1351 1352 status = ADD_STA_SUCCESS; 1353 if (cmd_flags & CMD_ASYNC) 1354 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, 1355 sizeof(cmd), &cmd); 1356 else 1357 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 1358 &cmd, &status); 1359 1360 switch (status) { 1361 case ADD_STA_SUCCESS: 1362 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); 1363 break; 1364 default: 1365 ret = -EIO; 1366 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); 1367 break; 1368 } 1369 1370 return ret; 1371 } 1372 1373 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, 1374 struct ieee80211_key_conf *keyconf, 1375 u8 sta_id, bool remove_key) 1376 { 1377 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; 1378 1379 /* verify the key details match the required command's expectations */ 1380 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) || 1381 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || 1382 (keyconf->keyidx != 4 && keyconf->keyidx != 5))) 1383 return -EINVAL; 1384 1385 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); 1386 igtk_cmd.sta_id = cpu_to_le32(sta_id); 1387 1388 if (remove_key) { 1389 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); 1390 } else { 1391 struct ieee80211_key_seq seq; 1392 const u8 *pn; 1393 1394 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen); 1395 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 1396 pn = seq.aes_cmac.pn; 1397 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | 1398 ((u64) pn[4] << 8) | 1399 ((u64) pn[3] << 16) | 1400 ((u64) pn[2] << 24) | 1401 ((u64) pn[1] << 32) | 1402 ((u64) pn[0] << 40)); 1403 } 1404 1405 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", 1406 remove_key ? "removing" : "installing", 1407 igtk_cmd.sta_id); 1408 1409 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, 1410 sizeof(igtk_cmd), &igtk_cmd); 1411 } 1412 1413 1414 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, 1415 struct ieee80211_vif *vif, 1416 struct ieee80211_sta *sta) 1417 { 1418 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1419 1420 if (sta) 1421 return sta->addr; 1422 1423 if (vif->type == NL80211_IFTYPE_STATION && 1424 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { 1425 u8 sta_id = mvmvif->ap_sta_id; 1426 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1427 lockdep_is_held(&mvm->mutex)); 1428 return sta->addr; 1429 } 1430 1431 1432 return NULL; 1433 } 1434 1435 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 1436 struct ieee80211_vif *vif, 1437 struct ieee80211_sta *sta, 1438 struct ieee80211_key_conf *keyconf, 1439 u8 key_offset, 1440 bool mcast) 1441 { 1442 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1443 int ret; 1444 const u8 *addr; 1445 struct ieee80211_key_seq seq; 1446 u16 p1k[5]; 1447 1448 switch (keyconf->cipher) { 1449 case WLAN_CIPHER_SUITE_TKIP: 1450 addr = iwl_mvm_get_mac_addr(mvm, vif, sta); 1451 /* get phase 1 key from mac80211 */ 1452 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 1453 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 1454 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 1455 seq.tkip.iv32, p1k, 0, key_offset); 1456 break; 1457 case WLAN_CIPHER_SUITE_CCMP: 1458 case WLAN_CIPHER_SUITE_WEP40: 1459 case WLAN_CIPHER_SUITE_WEP104: 1460 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 1461 0, NULL, 0, key_offset); 1462 break; 1463 default: 1464 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 1465 0, NULL, 0, key_offset); 1466 } 1467 1468 return ret; 1469 } 1470 1471 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, 1472 struct ieee80211_key_conf *keyconf, 1473 bool mcast) 1474 { 1475 struct iwl_mvm_add_sta_key_cmd cmd = {}; 1476 __le16 key_flags; 1477 int ret; 1478 u32 status; 1479 1480 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & 1481 STA_KEY_FLG_KEYID_MSK); 1482 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); 1483 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); 1484 1485 if (mcast) 1486 key_flags |= cpu_to_le16(STA_KEY_MULTICAST); 1487 1488 cmd.key_flags = key_flags; 1489 cmd.key_offset = keyconf->hw_key_idx; 1490 cmd.sta_id = sta_id; 1491 1492 status = ADD_STA_SUCCESS; 1493 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), 1494 &cmd, &status); 1495 1496 switch (status) { 1497 case ADD_STA_SUCCESS: 1498 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); 1499 break; 1500 default: 1501 ret = -EIO; 1502 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); 1503 break; 1504 } 1505 1506 return ret; 1507 } 1508 1509 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, 1510 struct ieee80211_vif *vif, 1511 struct ieee80211_sta *sta, 1512 struct ieee80211_key_conf *keyconf, 1513 u8 key_offset) 1514 { 1515 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 1516 struct iwl_mvm_sta *mvm_sta; 1517 u8 sta_id; 1518 int ret; 1519 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; 1520 1521 lockdep_assert_held(&mvm->mutex); 1522 1523 /* Get the station id from the mvm local station table */ 1524 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 1525 if (!mvm_sta) { 1526 IWL_ERR(mvm, "Failed to find station\n"); 1527 return -EINVAL; 1528 } 1529 sta_id = mvm_sta->sta_id; 1530 1531 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { 1532 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); 1533 goto end; 1534 } 1535 1536 /* 1537 * It is possible that the 'sta' parameter is NULL, and thus 1538 * there is a need to retrieve the sta from the local station table. 1539 */ 1540 if (!sta) { 1541 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], 1542 lockdep_is_held(&mvm->mutex)); 1543 if (IS_ERR_OR_NULL(sta)) { 1544 IWL_ERR(mvm, "Invalid station id\n"); 1545 return -EINVAL; 1546 } 1547 } 1548 1549 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) 1550 return -EINVAL; 1551 1552 /* If the key_offset is not pre-assigned, we need to find a 1553 * new offset to use. In normal cases, the offset is not 1554 * pre-assigned, but during HW_RESTART we want to reuse the 1555 * same indices, so we pass them when this function is called. 1556 * 1557 * In D3 entry, we need to hardcoded the indices (because the 1558 * firmware hardcodes the PTK offset to 0). In this case, we 1559 * need to make sure we don't overwrite the hw_key_idx in the 1560 * keyconf structure, because otherwise we cannot configure 1561 * the original ones back when resuming. 1562 */ 1563 if (key_offset == STA_KEY_IDX_INVALID) { 1564 key_offset = iwl_mvm_set_fw_key_idx(mvm); 1565 if (key_offset == STA_KEY_IDX_INVALID) 1566 return -ENOSPC; 1567 keyconf->hw_key_idx = key_offset; 1568 } 1569 1570 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); 1571 if (ret) 1572 goto end; 1573 1574 /* 1575 * For WEP, the same key is used for multicast and unicast. Upload it 1576 * again, using the same key offset, and now pointing the other one 1577 * to the same key slot (offset). 1578 * If this fails, remove the original as well. 1579 */ 1580 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 1581 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { 1582 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, 1583 key_offset, !mcast); 1584 if (ret) { 1585 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 1586 goto end; 1587 } 1588 } 1589 1590 __set_bit(key_offset, mvm->fw_key_table); 1591 1592 end: 1593 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 1594 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 1595 sta ? sta->addr : zero_addr, ret); 1596 return ret; 1597 } 1598 1599 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, 1600 struct ieee80211_vif *vif, 1601 struct ieee80211_sta *sta, 1602 struct ieee80211_key_conf *keyconf) 1603 { 1604 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 1605 struct iwl_mvm_sta *mvm_sta; 1606 u8 sta_id = IWL_MVM_STATION_COUNT; 1607 int ret, i; 1608 1609 lockdep_assert_held(&mvm->mutex); 1610 1611 /* Get the station from the mvm local station table */ 1612 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 1613 1614 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", 1615 keyconf->keyidx, sta_id); 1616 1617 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) 1618 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); 1619 1620 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { 1621 IWL_ERR(mvm, "offset %d not used in fw key table.\n", 1622 keyconf->hw_key_idx); 1623 return -ENOENT; 1624 } 1625 1626 /* track which key was deleted last */ 1627 for (i = 0; i < STA_KEY_MAX_NUM; i++) { 1628 if (mvm->fw_key_deleted[i] < U8_MAX) 1629 mvm->fw_key_deleted[i]++; 1630 } 1631 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; 1632 1633 if (!mvm_sta) { 1634 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); 1635 return 0; 1636 } 1637 1638 sta_id = mvm_sta->sta_id; 1639 1640 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); 1641 if (ret) 1642 return ret; 1643 1644 /* delete WEP key twice to get rid of (now useless) offset */ 1645 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || 1646 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) 1647 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); 1648 1649 return ret; 1650 } 1651 1652 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, 1653 struct ieee80211_vif *vif, 1654 struct ieee80211_key_conf *keyconf, 1655 struct ieee80211_sta *sta, u32 iv32, 1656 u16 *phase1key) 1657 { 1658 struct iwl_mvm_sta *mvm_sta; 1659 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); 1660 1661 rcu_read_lock(); 1662 1663 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); 1664 if (WARN_ON_ONCE(!mvm_sta)) 1665 goto unlock; 1666 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 1667 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); 1668 1669 unlock: 1670 rcu_read_unlock(); 1671 } 1672 1673 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, 1674 struct ieee80211_sta *sta) 1675 { 1676 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1677 struct iwl_mvm_add_sta_cmd cmd = { 1678 .add_modify = STA_MODE_MODIFY, 1679 .sta_id = mvmsta->sta_id, 1680 .station_flags_msk = cpu_to_le32(STA_FLG_PS), 1681 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 1682 }; 1683 int ret; 1684 1685 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1686 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1687 if (ret) 1688 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 1689 } 1690 1691 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, 1692 struct ieee80211_sta *sta, 1693 enum ieee80211_frame_release_type reason, 1694 u16 cnt, u16 tids, bool more_data, 1695 bool agg) 1696 { 1697 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1698 struct iwl_mvm_add_sta_cmd cmd = { 1699 .add_modify = STA_MODE_MODIFY, 1700 .sta_id = mvmsta->sta_id, 1701 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, 1702 .sleep_tx_count = cpu_to_le16(cnt), 1703 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 1704 }; 1705 int tid, ret; 1706 unsigned long _tids = tids; 1707 1708 /* convert TIDs to ACs - we don't support TSPEC so that's OK 1709 * Note that this field is reserved and unused by firmware not 1710 * supporting GO uAPSD, so it's safe to always do this. 1711 */ 1712 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) 1713 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); 1714 1715 /* If we're releasing frames from aggregation queues then check if the 1716 * all queues combined that we're releasing frames from have 1717 * - more frames than the service period, in which case more_data 1718 * needs to be set 1719 * - fewer than 'cnt' frames, in which case we need to adjust the 1720 * firmware command (but do that unconditionally) 1721 */ 1722 if (agg) { 1723 int remaining = cnt; 1724 int sleep_tx_count; 1725 1726 spin_lock_bh(&mvmsta->lock); 1727 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { 1728 struct iwl_mvm_tid_data *tid_data; 1729 u16 n_queued; 1730 1731 tid_data = &mvmsta->tid_data[tid]; 1732 if (WARN(tid_data->state != IWL_AGG_ON && 1733 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, 1734 "TID %d state is %d\n", 1735 tid, tid_data->state)) { 1736 spin_unlock_bh(&mvmsta->lock); 1737 ieee80211_sta_eosp(sta); 1738 return; 1739 } 1740 1741 n_queued = iwl_mvm_tid_queued(tid_data); 1742 if (n_queued > remaining) { 1743 more_data = true; 1744 remaining = 0; 1745 break; 1746 } 1747 remaining -= n_queued; 1748 } 1749 sleep_tx_count = cnt - remaining; 1750 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 1751 mvmsta->sleep_tx_count = sleep_tx_count; 1752 spin_unlock_bh(&mvmsta->lock); 1753 1754 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); 1755 if (WARN_ON(cnt - remaining == 0)) { 1756 ieee80211_sta_eosp(sta); 1757 return; 1758 } 1759 } 1760 1761 /* Note: this is ignored by firmware not supporting GO uAPSD */ 1762 if (more_data) 1763 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); 1764 1765 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { 1766 mvmsta->next_status_eosp = true; 1767 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); 1768 } else { 1769 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); 1770 } 1771 1772 /* block the Tx queues until the FW updated the sleep Tx count */ 1773 iwl_trans_block_txq_ptrs(mvm->trans, true); 1774 1775 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 1776 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, 1777 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1778 if (ret) 1779 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 1780 } 1781 1782 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, 1783 struct iwl_rx_cmd_buffer *rxb) 1784 { 1785 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1786 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; 1787 struct ieee80211_sta *sta; 1788 u32 sta_id = le32_to_cpu(notif->sta_id); 1789 1790 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) 1791 return; 1792 1793 rcu_read_lock(); 1794 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1795 if (!IS_ERR_OR_NULL(sta)) 1796 ieee80211_sta_eosp(sta); 1797 rcu_read_unlock(); 1798 } 1799 1800 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, 1801 struct iwl_mvm_sta *mvmsta, bool disable) 1802 { 1803 struct iwl_mvm_add_sta_cmd cmd = { 1804 .add_modify = STA_MODE_MODIFY, 1805 .sta_id = mvmsta->sta_id, 1806 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, 1807 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), 1808 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), 1809 }; 1810 int ret; 1811 1812 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, 1813 iwl_mvm_add_sta_cmd_size(mvm), &cmd); 1814 if (ret) 1815 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); 1816 } 1817 1818 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, 1819 struct ieee80211_sta *sta, 1820 bool disable) 1821 { 1822 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1823 1824 spin_lock_bh(&mvm_sta->lock); 1825 1826 if (mvm_sta->disable_tx == disable) { 1827 spin_unlock_bh(&mvm_sta->lock); 1828 return; 1829 } 1830 1831 mvm_sta->disable_tx = disable; 1832 1833 /* 1834 * Tell mac80211 to start/stop queuing tx for this station, 1835 * but don't stop queuing if there are still pending frames 1836 * for this station. 1837 */ 1838 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) 1839 ieee80211_sta_block_awake(mvm->hw, sta, disable); 1840 1841 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); 1842 1843 spin_unlock_bh(&mvm_sta->lock); 1844 } 1845 1846 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, 1847 struct iwl_mvm_vif *mvmvif, 1848 bool disable) 1849 { 1850 struct ieee80211_sta *sta; 1851 struct iwl_mvm_sta *mvm_sta; 1852 int i; 1853 1854 lockdep_assert_held(&mvm->mutex); 1855 1856 /* Block/unblock all the stations of the given mvmvif */ 1857 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { 1858 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 1859 lockdep_is_held(&mvm->mutex)); 1860 if (IS_ERR_OR_NULL(sta)) 1861 continue; 1862 1863 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 1864 if (mvm_sta->mac_id_n_color != 1865 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) 1866 continue; 1867 1868 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); 1869 } 1870 } 1871 1872 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1873 { 1874 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1875 struct iwl_mvm_sta *mvmsta; 1876 1877 rcu_read_lock(); 1878 1879 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); 1880 1881 if (!WARN_ON(!mvmsta)) 1882 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); 1883 1884 rcu_read_unlock(); 1885 } 1886