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 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2015 - 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 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 *****************************************************************************/ 61 #include <linux/etherdevice.h> 62 #include <linux/skbuff.h> 63 #include "iwl-trans.h" 64 #include "mvm.h" 65 #include "fw-api.h" 66 67 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, 68 int queue, struct ieee80211_sta *sta) 69 { 70 struct iwl_mvm_sta *mvmsta; 71 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 72 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); 73 struct iwl_mvm_key_pn *ptk_pn; 74 u8 tid, keyidx; 75 u8 pn[IEEE80211_CCMP_PN_LEN]; 76 u8 *extiv; 77 78 /* do PN checking */ 79 80 /* multicast and non-data only arrives on default queue */ 81 if (!ieee80211_is_data(hdr->frame_control) || 82 is_multicast_ether_addr(hdr->addr1)) 83 return 0; 84 85 /* do not check PN for open AP */ 86 if (!(stats->flag & RX_FLAG_DECRYPTED)) 87 return 0; 88 89 /* 90 * avoid checking for default queue - we don't want to replicate 91 * all the logic that's necessary for checking the PN on fragmented 92 * frames, leave that to mac80211 93 */ 94 if (queue == 0) 95 return 0; 96 97 /* if we are here - this for sure is either CCMP or GCMP */ 98 if (IS_ERR_OR_NULL(sta)) { 99 IWL_ERR(mvm, 100 "expected hw-decrypted unicast frame for station\n"); 101 return -1; 102 } 103 104 mvmsta = iwl_mvm_sta_from_mac80211(sta); 105 106 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 107 keyidx = extiv[3] >> 6; 108 109 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); 110 if (!ptk_pn) 111 return -1; 112 113 if (ieee80211_is_data_qos(hdr->frame_control)) 114 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 115 else 116 tid = 0; 117 118 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ 119 if (tid >= IWL_MAX_TID_COUNT) 120 return -1; 121 122 /* load pn */ 123 pn[0] = extiv[7]; 124 pn[1] = extiv[6]; 125 pn[2] = extiv[5]; 126 pn[3] = extiv[4]; 127 pn[4] = extiv[1]; 128 pn[5] = extiv[0]; 129 130 if (memcmp(pn, ptk_pn->q[queue].pn[tid], 131 IEEE80211_CCMP_PN_LEN) <= 0) 132 return -1; 133 134 if (!(stats->flag & RX_FLAG_AMSDU_MORE)) 135 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); 136 stats->flag |= RX_FLAG_PN_VALIDATED; 137 138 return 0; 139 } 140 141 /* iwl_mvm_create_skb Adds the rxb to a new skb */ 142 static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr, 143 u16 len, u8 crypt_len, 144 struct iwl_rx_cmd_buffer *rxb) 145 { 146 struct iwl_rx_packet *pkt = rxb_addr(rxb); 147 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 148 unsigned int headlen, fraglen, pad_len = 0; 149 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 150 151 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 152 pad_len = 2; 153 154 /* 155 * If the device inserted padding it means that (it thought) 156 * the 802.11 header wasn't a multiple of 4 bytes long. In 157 * this case, reserve two bytes at the start of the SKB to 158 * align the payload properly in case we end up copying it. 159 */ 160 skb_reserve(skb, pad_len); 161 } 162 len -= pad_len; 163 164 /* If frame is small enough to fit in skb->head, pull it completely. 165 * If not, only pull ieee80211_hdr (including crypto if present, and 166 * an additional 8 bytes for SNAP/ethertype, see below) so that 167 * splice() or TCP coalesce are more efficient. 168 * 169 * Since, in addition, ieee80211_data_to_8023() always pull in at 170 * least 8 bytes (possibly more for mesh) we can do the same here 171 * to save the cost of doing it later. That still doesn't pull in 172 * the actual IP header since the typical case has a SNAP header. 173 * If the latter changes (there are efforts in the standards group 174 * to do so) we should revisit this and ieee80211_data_to_8023(). 175 */ 176 headlen = (len <= skb_tailroom(skb)) ? len : 177 hdrlen + crypt_len + 8; 178 179 /* The firmware may align the packet to DWORD. 180 * The padding is inserted after the IV. 181 * After copying the header + IV skip the padding if 182 * present before copying packet data. 183 */ 184 hdrlen += crypt_len; 185 skb_put_data(skb, hdr, hdrlen); 186 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen); 187 188 fraglen = len - headlen; 189 190 if (fraglen) { 191 int offset = (void *)hdr + headlen + pad_len - 192 rxb_addr(rxb) + rxb_offset(rxb); 193 194 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 195 fraglen, rxb->truesize); 196 } 197 } 198 199 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ 200 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 201 struct napi_struct *napi, 202 struct sk_buff *skb, int queue, 203 struct ieee80211_sta *sta) 204 { 205 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) 206 kfree_skb(skb); 207 else 208 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 209 } 210 211 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 212 struct iwl_rx_mpdu_desc *desc, 213 struct ieee80211_rx_status *rx_status) 214 { 215 int energy_a, energy_b, max_energy; 216 u32 rate_flags = le32_to_cpu(desc->rate_n_flags); 217 218 energy_a = desc->energy_a; 219 energy_a = energy_a ? -energy_a : S8_MIN; 220 energy_b = desc->energy_b; 221 energy_b = energy_b ? -energy_b : S8_MIN; 222 max_energy = max(energy_a, energy_b); 223 224 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 225 energy_a, energy_b, max_energy); 226 227 rx_status->signal = max_energy; 228 rx_status->chains = 229 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 230 rx_status->chain_signal[0] = energy_a; 231 rx_status->chain_signal[1] = energy_b; 232 rx_status->chain_signal[2] = S8_MIN; 233 } 234 235 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, 236 struct ieee80211_rx_status *stats, 237 struct iwl_rx_mpdu_desc *desc, u32 pkt_flags, 238 int queue, u8 *crypt_len) 239 { 240 u16 status = le16_to_cpu(desc->status); 241 242 if (!ieee80211_has_protected(hdr->frame_control) || 243 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 244 IWL_RX_MPDU_STATUS_SEC_NONE) 245 return 0; 246 247 /* TODO: handle packets encrypted with unknown alg */ 248 249 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 250 case IWL_RX_MPDU_STATUS_SEC_CCM: 251 case IWL_RX_MPDU_STATUS_SEC_GCM: 252 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 253 /* alg is CCM: check MIC only */ 254 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 255 return -1; 256 257 stats->flag |= RX_FLAG_DECRYPTED; 258 if (pkt_flags & FH_RSCSR_RADA_EN) 259 stats->flag |= RX_FLAG_MIC_STRIPPED; 260 *crypt_len = IEEE80211_CCMP_HDR_LEN; 261 return 0; 262 case IWL_RX_MPDU_STATUS_SEC_TKIP: 263 /* Don't drop the frame and decrypt it in SW */ 264 if (!fw_has_api(&mvm->fw->ucode_capa, 265 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 266 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 267 return 0; 268 269 *crypt_len = IEEE80211_TKIP_IV_LEN; 270 /* fall through if TTAK OK */ 271 case IWL_RX_MPDU_STATUS_SEC_WEP: 272 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 273 return -1; 274 275 stats->flag |= RX_FLAG_DECRYPTED; 276 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 277 IWL_RX_MPDU_STATUS_SEC_WEP) 278 *crypt_len = IEEE80211_WEP_IV_LEN; 279 280 if (pkt_flags & FH_RSCSR_RADA_EN) 281 stats->flag |= RX_FLAG_ICV_STRIPPED; 282 283 return 0; 284 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 285 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 286 return -1; 287 stats->flag |= RX_FLAG_DECRYPTED; 288 return 0; 289 default: 290 /* Expected in monitor (not having the keys) */ 291 if (!mvm->monitor_on) 292 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 293 } 294 295 return 0; 296 } 297 298 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 299 struct sk_buff *skb, 300 struct iwl_rx_mpdu_desc *desc) 301 { 302 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 303 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 304 u16 flags = le16_to_cpu(desc->l3l4_flags); 305 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 306 IWL_RX_L3_PROTO_POS); 307 308 if (mvmvif->features & NETIF_F_RXCSUM && 309 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 310 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 311 l3_prot == IWL_RX_L3_TYPE_IPV6 || 312 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 313 skb->ip_summed = CHECKSUM_UNNECESSARY; 314 } 315 316 /* 317 * returns true if a packet outside BA session is a duplicate and 318 * should be dropped 319 */ 320 static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue, 321 struct ieee80211_rx_status *rx_status, 322 struct ieee80211_hdr *hdr, 323 struct iwl_rx_mpdu_desc *desc) 324 { 325 struct iwl_mvm_sta *mvm_sta; 326 struct iwl_mvm_rxq_dup_data *dup_data; 327 u8 baid, tid, sub_frame_idx; 328 329 if (WARN_ON(IS_ERR_OR_NULL(sta))) 330 return false; 331 332 baid = (le32_to_cpu(desc->reorder_data) & 333 IWL_RX_MPDU_REORDER_BAID_MASK) >> 334 IWL_RX_MPDU_REORDER_BAID_SHIFT; 335 336 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) 337 return false; 338 339 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 340 dup_data = &mvm_sta->dup_data[queue]; 341 342 /* 343 * Drop duplicate 802.11 retransmissions 344 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 345 */ 346 if (ieee80211_is_ctl(hdr->frame_control) || 347 ieee80211_is_qos_nullfunc(hdr->frame_control) || 348 is_multicast_ether_addr(hdr->addr1)) { 349 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 350 return false; 351 } 352 353 if (ieee80211_is_data_qos(hdr->frame_control)) 354 /* frame has qos control */ 355 tid = *ieee80211_get_qos_ctl(hdr) & 356 IEEE80211_QOS_CTL_TID_MASK; 357 else 358 tid = IWL_MAX_TID_COUNT; 359 360 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 361 sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 362 363 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 364 dup_data->last_seq[tid] == hdr->seq_ctrl && 365 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 366 return true; 367 368 dup_data->last_seq[tid] = hdr->seq_ctrl; 369 dup_data->last_sub_frame[tid] = sub_frame_idx; 370 371 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 372 373 return false; 374 } 375 376 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, 377 const u8 *data, u32 count) 378 { 379 struct iwl_rxq_sync_cmd *cmd; 380 u32 data_size = sizeof(*cmd) + count; 381 int ret; 382 383 /* should be DWORD aligned */ 384 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) 385 return -EINVAL; 386 387 cmd = kzalloc(data_size, GFP_KERNEL); 388 if (!cmd) 389 return -ENOMEM; 390 391 cmd->rxq_mask = cpu_to_le32(rxq_mask); 392 cmd->count = cpu_to_le32(count); 393 cmd->flags = 0; 394 memcpy(cmd->payload, data, count); 395 396 ret = iwl_mvm_send_cmd_pdu(mvm, 397 WIDE_ID(DATA_PATH_GROUP, 398 TRIGGER_RX_QUEUES_NOTIF_CMD), 399 0, data_size, cmd); 400 401 kfree(cmd); 402 return ret; 403 } 404 405 /* 406 * Returns true if sn2 - buffer_size < sn1 < sn2. 407 * To be used only in order to compare reorder buffer head with NSSN. 408 * We fully trust NSSN unless it is behind us due to reorder timeout. 409 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 410 */ 411 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 412 { 413 return ieee80211_sn_less(sn1, sn2) && 414 !ieee80211_sn_less(sn1, sn2 - buffer_size); 415 } 416 417 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 418 419 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 420 struct ieee80211_sta *sta, 421 struct napi_struct *napi, 422 struct iwl_mvm_baid_data *baid_data, 423 struct iwl_mvm_reorder_buffer *reorder_buf, 424 u16 nssn) 425 { 426 struct iwl_mvm_reorder_buf_entry *entries = 427 &baid_data->entries[reorder_buf->queue * 428 baid_data->entries_per_queue]; 429 u16 ssn = reorder_buf->head_sn; 430 431 lockdep_assert_held(&reorder_buf->lock); 432 433 /* ignore nssn smaller than head sn - this can happen due to timeout */ 434 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 435 goto set_timer; 436 437 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 438 int index = ssn % reorder_buf->buf_size; 439 struct sk_buff_head *skb_list = &entries[index].e.frames; 440 struct sk_buff *skb; 441 442 ssn = ieee80211_sn_inc(ssn); 443 444 /* 445 * Empty the list. Will have more than one frame for A-MSDU. 446 * Empty list is valid as well since nssn indicates frames were 447 * received. 448 */ 449 while ((skb = __skb_dequeue(skb_list))) { 450 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 451 reorder_buf->queue, 452 sta); 453 reorder_buf->num_stored--; 454 } 455 } 456 reorder_buf->head_sn = nssn; 457 458 set_timer: 459 if (reorder_buf->num_stored && !reorder_buf->removed) { 460 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 461 462 while (skb_queue_empty(&entries[index].e.frames)) 463 index = (index + 1) % reorder_buf->buf_size; 464 /* modify timer to match next frame's expiration time */ 465 mod_timer(&reorder_buf->reorder_timer, 466 entries[index].e.reorder_time + 1 + 467 RX_REORDER_BUF_TIMEOUT_MQ); 468 } else { 469 del_timer(&reorder_buf->reorder_timer); 470 } 471 } 472 473 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 474 { 475 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 476 struct iwl_mvm_baid_data *baid_data = 477 iwl_mvm_baid_data_from_reorder_buf(buf); 478 struct iwl_mvm_reorder_buf_entry *entries = 479 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 480 int i; 481 u16 sn = 0, index = 0; 482 bool expired = false; 483 bool cont = false; 484 485 spin_lock(&buf->lock); 486 487 if (!buf->num_stored || buf->removed) { 488 spin_unlock(&buf->lock); 489 return; 490 } 491 492 for (i = 0; i < buf->buf_size ; i++) { 493 index = (buf->head_sn + i) % buf->buf_size; 494 495 if (skb_queue_empty(&entries[index].e.frames)) { 496 /* 497 * If there is a hole and the next frame didn't expire 498 * we want to break and not advance SN 499 */ 500 cont = false; 501 continue; 502 } 503 if (!cont && 504 !time_after(jiffies, entries[index].e.reorder_time + 505 RX_REORDER_BUF_TIMEOUT_MQ)) 506 break; 507 508 expired = true; 509 /* continue until next hole after this expired frames */ 510 cont = true; 511 sn = ieee80211_sn_add(buf->head_sn, i + 1); 512 } 513 514 if (expired) { 515 struct ieee80211_sta *sta; 516 struct iwl_mvm_sta *mvmsta; 517 u8 sta_id = baid_data->sta_id; 518 519 rcu_read_lock(); 520 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 521 mvmsta = iwl_mvm_sta_from_mac80211(sta); 522 523 /* SN is set to the last expired frame + 1 */ 524 IWL_DEBUG_HT(buf->mvm, 525 "Releasing expired frames for sta %u, sn %d\n", 526 sta_id, sn); 527 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 528 sta, baid_data->tid); 529 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn); 530 rcu_read_unlock(); 531 } else { 532 /* 533 * If no frame expired and there are stored frames, index is now 534 * pointing to the first unexpired frame - modify timer 535 * accordingly to this frame. 536 */ 537 mod_timer(&buf->reorder_timer, 538 entries[index].e.reorder_time + 539 1 + RX_REORDER_BUF_TIMEOUT_MQ); 540 } 541 spin_unlock(&buf->lock); 542 } 543 544 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 545 struct iwl_mvm_delba_data *data) 546 { 547 struct iwl_mvm_baid_data *ba_data; 548 struct ieee80211_sta *sta; 549 struct iwl_mvm_reorder_buffer *reorder_buf; 550 u8 baid = data->baid; 551 552 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 553 return; 554 555 rcu_read_lock(); 556 557 ba_data = rcu_dereference(mvm->baid_map[baid]); 558 if (WARN_ON_ONCE(!ba_data)) 559 goto out; 560 561 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 562 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 563 goto out; 564 565 reorder_buf = &ba_data->reorder_buf[queue]; 566 567 /* release all frames that are in the reorder buffer to the stack */ 568 spin_lock_bh(&reorder_buf->lock); 569 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 570 ieee80211_sn_add(reorder_buf->head_sn, 571 reorder_buf->buf_size)); 572 spin_unlock_bh(&reorder_buf->lock); 573 del_timer_sync(&reorder_buf->reorder_timer); 574 575 out: 576 rcu_read_unlock(); 577 } 578 579 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 580 int queue) 581 { 582 struct iwl_rx_packet *pkt = rxb_addr(rxb); 583 struct iwl_rxq_sync_notification *notif; 584 struct iwl_mvm_internal_rxq_notif *internal_notif; 585 586 notif = (void *)pkt->data; 587 internal_notif = (void *)notif->payload; 588 589 if (internal_notif->sync) { 590 if (mvm->queue_sync_cookie != internal_notif->cookie) { 591 WARN_ONCE(1, 592 "Received expired RX queue sync message\n"); 593 return; 594 } 595 if (!atomic_dec_return(&mvm->queue_sync_counter)) 596 wake_up(&mvm->rx_sync_waitq); 597 } 598 599 switch (internal_notif->type) { 600 case IWL_MVM_RXQ_EMPTY: 601 break; 602 case IWL_MVM_RXQ_NOTIF_DEL_BA: 603 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 604 break; 605 default: 606 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 607 } 608 } 609 610 /* 611 * Returns true if the MPDU was buffered\dropped, false if it should be passed 612 * to upper layer. 613 */ 614 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 615 struct napi_struct *napi, 616 int queue, 617 struct ieee80211_sta *sta, 618 struct sk_buff *skb, 619 struct iwl_rx_mpdu_desc *desc) 620 { 621 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 622 struct iwl_mvm_sta *mvm_sta; 623 struct iwl_mvm_baid_data *baid_data; 624 struct iwl_mvm_reorder_buffer *buffer; 625 struct sk_buff *tail; 626 u32 reorder = le32_to_cpu(desc->reorder_data); 627 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 628 bool last_subframe = 629 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 630 u8 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 631 u8 sub_frame_idx = desc->amsdu_info & 632 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 633 struct iwl_mvm_reorder_buf_entry *entries; 634 int index; 635 u16 nssn, sn; 636 u8 baid; 637 638 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 639 IWL_RX_MPDU_REORDER_BAID_SHIFT; 640 641 /* 642 * This also covers the case of receiving a Block Ack Request 643 * outside a BA session; we'll pass it to mac80211 and that 644 * then sends a delBA action frame. 645 */ 646 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 647 return false; 648 649 /* no sta yet */ 650 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 651 "Got valid BAID without a valid station assigned\n")) 652 return false; 653 654 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 655 656 /* not a data packet or a bar */ 657 if (!ieee80211_is_back_req(hdr->frame_control) && 658 (!ieee80211_is_data_qos(hdr->frame_control) || 659 is_multicast_ether_addr(hdr->addr1))) 660 return false; 661 662 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 663 return false; 664 665 baid_data = rcu_dereference(mvm->baid_map[baid]); 666 if (!baid_data) { 667 IWL_DEBUG_RX(mvm, 668 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 669 baid, reorder); 670 return false; 671 } 672 673 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 674 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 675 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 676 tid)) 677 return false; 678 679 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 680 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 681 IWL_RX_MPDU_REORDER_SN_SHIFT; 682 683 buffer = &baid_data->reorder_buf[queue]; 684 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 685 686 spin_lock_bh(&buffer->lock); 687 688 if (!buffer->valid) { 689 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 690 spin_unlock_bh(&buffer->lock); 691 return false; 692 } 693 buffer->valid = true; 694 } 695 696 if (ieee80211_is_back_req(hdr->frame_control)) { 697 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 698 goto drop; 699 } 700 701 /* 702 * If there was a significant jump in the nssn - adjust. 703 * If the SN is smaller than the NSSN it might need to first go into 704 * the reorder buffer, in which case we just release up to it and the 705 * rest of the function will take care of storing it and releasing up to 706 * the nssn 707 */ 708 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 709 buffer->buf_size) || 710 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 711 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 712 713 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 714 min_sn); 715 } 716 717 /* drop any oudated packets */ 718 if (ieee80211_sn_less(sn, buffer->head_sn)) 719 goto drop; 720 721 /* release immediately if allowed by nssn and no stored frames */ 722 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 723 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 724 buffer->buf_size) && 725 (!amsdu || last_subframe)) 726 buffer->head_sn = nssn; 727 /* No need to update AMSDU last SN - we are moving the head */ 728 spin_unlock_bh(&buffer->lock); 729 return false; 730 } 731 732 /* 733 * release immediately if there are no stored frames, and the sn is 734 * equal to the head. 735 * This can happen due to reorder timer, where NSSN is behind head_sn. 736 * When we released everything, and we got the next frame in the 737 * sequence, according to the NSSN we can't release immediately, 738 * while technically there is no hole and we can move forward. 739 */ 740 if (!buffer->num_stored && sn == buffer->head_sn) { 741 if (!amsdu || last_subframe) 742 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 743 /* No need to update AMSDU last SN - we are moving the head */ 744 spin_unlock_bh(&buffer->lock); 745 return false; 746 } 747 748 index = sn % buffer->buf_size; 749 750 /* 751 * Check if we already stored this frame 752 * As AMSDU is either received or not as whole, logic is simple: 753 * If we have frames in that position in the buffer and the last frame 754 * originated from AMSDU had a different SN then it is a retransmission. 755 * If it is the same SN then if the subframe index is incrementing it 756 * is the same AMSDU - otherwise it is a retransmission. 757 */ 758 tail = skb_peek_tail(&entries[index].e.frames); 759 if (tail && !amsdu) 760 goto drop; 761 else if (tail && (sn != buffer->last_amsdu || 762 buffer->last_sub_index >= sub_frame_idx)) 763 goto drop; 764 765 /* put in reorder buffer */ 766 __skb_queue_tail(&entries[index].e.frames, skb); 767 buffer->num_stored++; 768 entries[index].e.reorder_time = jiffies; 769 770 if (amsdu) { 771 buffer->last_amsdu = sn; 772 buffer->last_sub_index = sub_frame_idx; 773 } 774 775 /* 776 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 777 * The reason is that NSSN advances on the first sub-frame, and may 778 * cause the reorder buffer to advance before all the sub-frames arrive. 779 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 780 * SN 1. NSSN for first sub frame will be 3 with the result of driver 781 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 782 * already ahead and it will be dropped. 783 * If the last sub-frame is not on this queue - we will get frame 784 * release notification with up to date NSSN. 785 */ 786 if (!amsdu || last_subframe) 787 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 788 789 spin_unlock_bh(&buffer->lock); 790 return true; 791 792 drop: 793 kfree_skb(skb); 794 spin_unlock_bh(&buffer->lock); 795 return true; 796 } 797 798 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 799 u32 reorder_data, u8 baid) 800 { 801 unsigned long now = jiffies; 802 unsigned long timeout; 803 struct iwl_mvm_baid_data *data; 804 805 rcu_read_lock(); 806 807 data = rcu_dereference(mvm->baid_map[baid]); 808 if (!data) { 809 IWL_DEBUG_RX(mvm, 810 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 811 baid, reorder_data); 812 goto out; 813 } 814 815 if (!data->timeout) 816 goto out; 817 818 timeout = data->timeout; 819 /* 820 * Do not update last rx all the time to avoid cache bouncing 821 * between the rx queues. 822 * Update it every timeout. Worst case is the session will 823 * expire after ~ 2 * timeout, which doesn't matter that much. 824 */ 825 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 826 /* Update is atomic */ 827 data->last_rx = now; 828 829 out: 830 rcu_read_unlock(); 831 } 832 833 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 834 struct iwl_rx_cmd_buffer *rxb, int queue) 835 { 836 struct ieee80211_rx_status *rx_status; 837 struct iwl_rx_packet *pkt = rxb_addr(rxb); 838 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 839 struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc)); 840 u32 len = le16_to_cpu(desc->mpdu_len); 841 u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags); 842 u16 phy_info = le16_to_cpu(desc->phy_info); 843 struct ieee80211_sta *sta = NULL; 844 struct sk_buff *skb; 845 u8 crypt_len = 0; 846 847 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 848 return; 849 850 /* Dont use dev_alloc_skb(), we'll have enough headroom once 851 * ieee80211_hdr pulled. 852 */ 853 skb = alloc_skb(128, GFP_ATOMIC); 854 if (!skb) { 855 IWL_ERR(mvm, "alloc_skb failed\n"); 856 return; 857 } 858 859 rx_status = IEEE80211_SKB_RXCB(skb); 860 861 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, 862 le32_to_cpu(pkt->len_n_flags), queue, 863 &crypt_len)) { 864 kfree_skb(skb); 865 return; 866 } 867 868 /* 869 * Keep packets with CRC errors (and with overrun) for monitor mode 870 * (otherwise the firmware discards them) but mark them as bad. 871 */ 872 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || 873 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 874 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 875 le16_to_cpu(desc->status)); 876 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 877 } 878 /* set the preamble flag if appropriate */ 879 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 880 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 881 882 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 883 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise); 884 /* TSF as indicated by the firmware is at INA time */ 885 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 886 } 887 rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise); 888 rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ : 889 NL80211_BAND_2GHZ; 890 rx_status->freq = ieee80211_channel_to_frequency(desc->channel, 891 rx_status->band); 892 iwl_mvm_get_signal_strength(mvm, desc, rx_status); 893 894 /* update aggregation data for monitor sake on default queue */ 895 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 896 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 897 898 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 899 rx_status->ampdu_reference = mvm->ampdu_ref; 900 /* toggle is switched whenever new aggregation starts */ 901 if (toggle_bit != mvm->ampdu_toggle) { 902 mvm->ampdu_ref++; 903 mvm->ampdu_toggle = toggle_bit; 904 } 905 } 906 907 rcu_read_lock(); 908 909 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 910 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; 911 912 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 913 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 914 if (IS_ERR(sta)) 915 sta = NULL; 916 } 917 } else if (!is_multicast_ether_addr(hdr->addr2)) { 918 /* 919 * This is fine since we prevent two stations with the same 920 * address from being added. 921 */ 922 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 923 } 924 925 if (sta) { 926 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 927 struct ieee80211_vif *tx_blocked_vif = 928 rcu_dereference(mvm->csa_tx_blocked_vif); 929 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 930 IWL_RX_MPDU_REORDER_BAID_MASK) >> 931 IWL_RX_MPDU_REORDER_BAID_SHIFT); 932 933 /* 934 * We have tx blocked stations (with CS bit). If we heard 935 * frames from a blocked station on a new channel we can 936 * TX to it again. 937 */ 938 if (unlikely(tx_blocked_vif) && 939 tx_blocked_vif == mvmsta->vif) { 940 struct iwl_mvm_vif *mvmvif = 941 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 942 943 if (mvmvif->csa_target_freq == rx_status->freq) 944 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 945 false); 946 } 947 948 rs_update_last_rssi(mvm, mvmsta, rx_status); 949 950 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 951 ieee80211_is_beacon(hdr->frame_control)) { 952 struct iwl_fw_dbg_trigger_tlv *trig; 953 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 954 bool trig_check; 955 s32 rssi; 956 957 trig = iwl_fw_dbg_get_trigger(mvm->fw, 958 FW_DBG_TRIGGER_RSSI); 959 rssi_trig = (void *)trig->data; 960 rssi = le32_to_cpu(rssi_trig->rssi); 961 962 trig_check = 963 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 964 ieee80211_vif_to_wdev(mvmsta->vif), 965 trig); 966 if (trig_check && rx_status->signal < rssi) 967 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 968 NULL); 969 } 970 971 if (ieee80211_is_data(hdr->frame_control)) 972 iwl_mvm_rx_csum(sta, skb, desc); 973 974 if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) { 975 kfree_skb(skb); 976 goto out; 977 } 978 979 /* 980 * Our hardware de-aggregates AMSDUs but copies the mac header 981 * as it to the de-aggregated MPDUs. We need to turn off the 982 * AMSDU bit in the QoS control ourselves. 983 * In addition, HW reverses addr3 and addr4 - reverse it back. 984 */ 985 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 986 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 987 int i; 988 u8 *qc = ieee80211_get_qos_ctl(hdr); 989 u8 mac_addr[ETH_ALEN]; 990 991 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 992 993 for (i = 0; i < ETH_ALEN; i++) 994 mac_addr[i] = hdr->addr3[ETH_ALEN - i - 1]; 995 ether_addr_copy(hdr->addr3, mac_addr); 996 997 if (ieee80211_has_a4(hdr->frame_control)) { 998 for (i = 0; i < ETH_ALEN; i++) 999 mac_addr[i] = 1000 hdr->addr4[ETH_ALEN - i - 1]; 1001 ether_addr_copy(hdr->addr4, mac_addr); 1002 } 1003 } 1004 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1005 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1006 1007 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1008 } 1009 } 1010 1011 /* Set up the HT phy flags */ 1012 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1013 case RATE_MCS_CHAN_WIDTH_20: 1014 break; 1015 case RATE_MCS_CHAN_WIDTH_40: 1016 rx_status->bw = RATE_INFO_BW_40; 1017 break; 1018 case RATE_MCS_CHAN_WIDTH_80: 1019 rx_status->bw = RATE_INFO_BW_80; 1020 break; 1021 case RATE_MCS_CHAN_WIDTH_160: 1022 rx_status->bw = RATE_INFO_BW_160; 1023 break; 1024 } 1025 1026 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1027 rate_n_flags & RATE_MCS_SGI_MSK) 1028 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1029 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1030 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1031 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1032 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1033 if (rate_n_flags & RATE_MCS_HT_MSK) { 1034 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1035 RATE_MCS_STBC_POS; 1036 rx_status->encoding = RX_ENC_HT; 1037 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1038 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1039 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1040 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1041 RATE_MCS_STBC_POS; 1042 rx_status->nss = 1043 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1044 RATE_VHT_MCS_NSS_POS) + 1; 1045 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1046 rx_status->encoding = RX_ENC_VHT; 1047 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1048 if (rate_n_flags & RATE_MCS_BF_MSK) 1049 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1050 } else { 1051 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1052 rx_status->band); 1053 1054 if (WARN(rate < 0 || rate > 0xFF, 1055 "Invalid rate flags 0x%x, band %d,\n", 1056 rate_n_flags, rx_status->band)) { 1057 kfree_skb(skb); 1058 goto out; 1059 } 1060 rx_status->rate_idx = rate; 1061 1062 } 1063 1064 /* management stuff on default queue */ 1065 if (!queue) { 1066 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 1067 ieee80211_is_probe_resp(hdr->frame_control)) && 1068 mvm->sched_scan_pass_all == 1069 SCHED_SCAN_PASS_ALL_ENABLED)) 1070 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 1071 1072 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 1073 ieee80211_is_probe_resp(hdr->frame_control))) 1074 rx_status->boottime_ns = ktime_get_boot_ns(); 1075 } 1076 1077 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); 1078 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 1079 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); 1080 out: 1081 rcu_read_unlock(); 1082 } 1083 1084 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 1085 struct iwl_rx_cmd_buffer *rxb, int queue) 1086 { 1087 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1088 struct iwl_frame_release *release = (void *)pkt->data; 1089 struct ieee80211_sta *sta; 1090 struct iwl_mvm_reorder_buffer *reorder_buf; 1091 struct iwl_mvm_baid_data *ba_data; 1092 1093 int baid = release->baid; 1094 1095 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 1096 release->baid, le16_to_cpu(release->nssn)); 1097 1098 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1099 return; 1100 1101 rcu_read_lock(); 1102 1103 ba_data = rcu_dereference(mvm->baid_map[baid]); 1104 if (WARN_ON_ONCE(!ba_data)) 1105 goto out; 1106 1107 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 1108 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1109 goto out; 1110 1111 reorder_buf = &ba_data->reorder_buf[queue]; 1112 1113 spin_lock_bh(&reorder_buf->lock); 1114 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf, 1115 le16_to_cpu(release->nssn)); 1116 spin_unlock_bh(&reorder_buf->lock); 1117 1118 out: 1119 rcu_read_unlock(); 1120 } 1121