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 int res; 75 u8 tid, keyidx; 76 u8 pn[IEEE80211_CCMP_PN_LEN]; 77 u8 *extiv; 78 79 /* do PN checking */ 80 81 /* multicast and non-data only arrives on default queue */ 82 if (!ieee80211_is_data(hdr->frame_control) || 83 is_multicast_ether_addr(hdr->addr1)) 84 return 0; 85 86 /* do not check PN for open AP */ 87 if (!(stats->flag & RX_FLAG_DECRYPTED)) 88 return 0; 89 90 /* 91 * avoid checking for default queue - we don't want to replicate 92 * all the logic that's necessary for checking the PN on fragmented 93 * frames, leave that to mac80211 94 */ 95 if (queue == 0) 96 return 0; 97 98 /* if we are here - this for sure is either CCMP or GCMP */ 99 if (IS_ERR_OR_NULL(sta)) { 100 IWL_ERR(mvm, 101 "expected hw-decrypted unicast frame for station\n"); 102 return -1; 103 } 104 105 mvmsta = iwl_mvm_sta_from_mac80211(sta); 106 107 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 108 keyidx = extiv[3] >> 6; 109 110 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); 111 if (!ptk_pn) 112 return -1; 113 114 if (ieee80211_is_data_qos(hdr->frame_control)) 115 tid = ieee80211_get_tid(hdr); 116 else 117 tid = 0; 118 119 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ 120 if (tid >= IWL_MAX_TID_COUNT) 121 return -1; 122 123 /* load pn */ 124 pn[0] = extiv[7]; 125 pn[1] = extiv[6]; 126 pn[2] = extiv[5]; 127 pn[3] = extiv[4]; 128 pn[4] = extiv[1]; 129 pn[5] = extiv[0]; 130 131 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN); 132 if (res < 0) 133 return -1; 134 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN)) 135 return -1; 136 137 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); 138 stats->flag |= RX_FLAG_PN_VALIDATED; 139 140 return 0; 141 } 142 143 /* iwl_mvm_create_skb Adds the rxb to a new skb */ 144 static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr, 145 u16 len, u8 crypt_len, 146 struct iwl_rx_cmd_buffer *rxb) 147 { 148 struct iwl_rx_packet *pkt = rxb_addr(rxb); 149 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 150 unsigned int headlen, fraglen, pad_len = 0; 151 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 152 153 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 154 len -= 2; 155 pad_len = 2; 156 } 157 158 /* If frame is small enough to fit in skb->head, pull it completely. 159 * If not, only pull ieee80211_hdr (including crypto if present, and 160 * an additional 8 bytes for SNAP/ethertype, see below) so that 161 * splice() or TCP coalesce are more efficient. 162 * 163 * Since, in addition, ieee80211_data_to_8023() always pull in at 164 * least 8 bytes (possibly more for mesh) we can do the same here 165 * to save the cost of doing it later. That still doesn't pull in 166 * the actual IP header since the typical case has a SNAP header. 167 * If the latter changes (there are efforts in the standards group 168 * to do so) we should revisit this and ieee80211_data_to_8023(). 169 */ 170 headlen = (len <= skb_tailroom(skb)) ? len : 171 hdrlen + crypt_len + 8; 172 173 /* The firmware may align the packet to DWORD. 174 * The padding is inserted after the IV. 175 * After copying the header + IV skip the padding if 176 * present before copying packet data. 177 */ 178 hdrlen += crypt_len; 179 skb_put_data(skb, hdr, hdrlen); 180 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen); 181 182 fraglen = len - headlen; 183 184 if (fraglen) { 185 int offset = (void *)hdr + headlen + pad_len - 186 rxb_addr(rxb) + rxb_offset(rxb); 187 188 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 189 fraglen, rxb->truesize); 190 } 191 } 192 193 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ 194 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 195 struct napi_struct *napi, 196 struct sk_buff *skb, int queue, 197 struct ieee80211_sta *sta) 198 { 199 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) 200 kfree_skb(skb); 201 else 202 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 203 } 204 205 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 206 struct iwl_rx_mpdu_desc *desc, 207 struct ieee80211_rx_status *rx_status) 208 { 209 int energy_a, energy_b, max_energy; 210 u32 rate_flags = le32_to_cpu(desc->rate_n_flags); 211 212 energy_a = desc->energy_a; 213 energy_a = energy_a ? -energy_a : S8_MIN; 214 energy_b = desc->energy_b; 215 energy_b = energy_b ? -energy_b : S8_MIN; 216 max_energy = max(energy_a, energy_b); 217 218 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 219 energy_a, energy_b, max_energy); 220 221 rx_status->signal = max_energy; 222 rx_status->chains = 223 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 224 rx_status->chain_signal[0] = energy_a; 225 rx_status->chain_signal[1] = energy_b; 226 rx_status->chain_signal[2] = S8_MIN; 227 } 228 229 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, 230 struct ieee80211_rx_status *stats, 231 struct iwl_rx_mpdu_desc *desc, u32 pkt_flags, 232 int queue, u8 *crypt_len) 233 { 234 u16 status = le16_to_cpu(desc->status); 235 236 if (!ieee80211_has_protected(hdr->frame_control) || 237 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 238 IWL_RX_MPDU_STATUS_SEC_NONE) 239 return 0; 240 241 /* TODO: handle packets encrypted with unknown alg */ 242 243 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 244 case IWL_RX_MPDU_STATUS_SEC_CCM: 245 case IWL_RX_MPDU_STATUS_SEC_GCM: 246 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 247 /* alg is CCM: check MIC only */ 248 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 249 return -1; 250 251 stats->flag |= RX_FLAG_DECRYPTED; 252 if (pkt_flags & FH_RSCSR_RADA_EN) 253 stats->flag |= RX_FLAG_MIC_STRIPPED; 254 *crypt_len = IEEE80211_CCMP_HDR_LEN; 255 return 0; 256 case IWL_RX_MPDU_STATUS_SEC_TKIP: 257 /* Don't drop the frame and decrypt it in SW */ 258 if (!fw_has_api(&mvm->fw->ucode_capa, 259 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 260 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 261 return 0; 262 263 *crypt_len = IEEE80211_TKIP_IV_LEN; 264 /* fall through if TTAK OK */ 265 case IWL_RX_MPDU_STATUS_SEC_WEP: 266 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 267 return -1; 268 269 stats->flag |= RX_FLAG_DECRYPTED; 270 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 271 IWL_RX_MPDU_STATUS_SEC_WEP) 272 *crypt_len = IEEE80211_WEP_IV_LEN; 273 274 if (pkt_flags & FH_RSCSR_RADA_EN) 275 stats->flag |= RX_FLAG_ICV_STRIPPED; 276 277 return 0; 278 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 279 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 280 return -1; 281 stats->flag |= RX_FLAG_DECRYPTED; 282 return 0; 283 default: 284 /* Expected in monitor (not having the keys) */ 285 if (!mvm->monitor_on) 286 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 287 } 288 289 return 0; 290 } 291 292 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 293 struct sk_buff *skb, 294 struct iwl_rx_mpdu_desc *desc) 295 { 296 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 297 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 298 u16 flags = le16_to_cpu(desc->l3l4_flags); 299 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 300 IWL_RX_L3_PROTO_POS); 301 302 if (mvmvif->features & NETIF_F_RXCSUM && 303 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 304 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 305 l3_prot == IWL_RX_L3_TYPE_IPV6 || 306 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 307 skb->ip_summed = CHECKSUM_UNNECESSARY; 308 } 309 310 /* 311 * returns true if a packet is a duplicate and should be dropped. 312 * Updates AMSDU PN tracking info 313 */ 314 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 315 struct ieee80211_rx_status *rx_status, 316 struct ieee80211_hdr *hdr, 317 struct iwl_rx_mpdu_desc *desc) 318 { 319 struct iwl_mvm_sta *mvm_sta; 320 struct iwl_mvm_rxq_dup_data *dup_data; 321 u8 tid, sub_frame_idx; 322 323 if (WARN_ON(IS_ERR_OR_NULL(sta))) 324 return false; 325 326 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 327 dup_data = &mvm_sta->dup_data[queue]; 328 329 /* 330 * Drop duplicate 802.11 retransmissions 331 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 332 */ 333 if (ieee80211_is_ctl(hdr->frame_control) || 334 ieee80211_is_qos_nullfunc(hdr->frame_control) || 335 is_multicast_ether_addr(hdr->addr1)) { 336 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 337 return false; 338 } 339 340 if (ieee80211_is_data_qos(hdr->frame_control)) 341 /* frame has qos control */ 342 tid = ieee80211_get_tid(hdr); 343 else 344 tid = IWL_MAX_TID_COUNT; 345 346 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 347 sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 348 349 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 350 dup_data->last_seq[tid] == hdr->seq_ctrl && 351 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 352 return true; 353 354 /* Allow same PN as the first subframe for following sub frames */ 355 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 356 sub_frame_idx > dup_data->last_sub_frame[tid] && 357 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 358 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 359 360 dup_data->last_seq[tid] = hdr->seq_ctrl; 361 dup_data->last_sub_frame[tid] = sub_frame_idx; 362 363 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 364 365 return false; 366 } 367 368 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, 369 const u8 *data, u32 count) 370 { 371 struct iwl_rxq_sync_cmd *cmd; 372 u32 data_size = sizeof(*cmd) + count; 373 int ret; 374 375 /* should be DWORD aligned */ 376 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) 377 return -EINVAL; 378 379 cmd = kzalloc(data_size, GFP_KERNEL); 380 if (!cmd) 381 return -ENOMEM; 382 383 cmd->rxq_mask = cpu_to_le32(rxq_mask); 384 cmd->count = cpu_to_le32(count); 385 cmd->flags = 0; 386 memcpy(cmd->payload, data, count); 387 388 ret = iwl_mvm_send_cmd_pdu(mvm, 389 WIDE_ID(DATA_PATH_GROUP, 390 TRIGGER_RX_QUEUES_NOTIF_CMD), 391 0, data_size, cmd); 392 393 kfree(cmd); 394 return ret; 395 } 396 397 /* 398 * Returns true if sn2 - buffer_size < sn1 < sn2. 399 * To be used only in order to compare reorder buffer head with NSSN. 400 * We fully trust NSSN unless it is behind us due to reorder timeout. 401 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 402 */ 403 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 404 { 405 return ieee80211_sn_less(sn1, sn2) && 406 !ieee80211_sn_less(sn1, sn2 - buffer_size); 407 } 408 409 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 410 411 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 412 struct ieee80211_sta *sta, 413 struct napi_struct *napi, 414 struct iwl_mvm_baid_data *baid_data, 415 struct iwl_mvm_reorder_buffer *reorder_buf, 416 u16 nssn) 417 { 418 struct iwl_mvm_reorder_buf_entry *entries = 419 &baid_data->entries[reorder_buf->queue * 420 baid_data->entries_per_queue]; 421 u16 ssn = reorder_buf->head_sn; 422 423 lockdep_assert_held(&reorder_buf->lock); 424 425 /* ignore nssn smaller than head sn - this can happen due to timeout */ 426 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 427 goto set_timer; 428 429 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 430 int index = ssn % reorder_buf->buf_size; 431 struct sk_buff_head *skb_list = &entries[index].e.frames; 432 struct sk_buff *skb; 433 434 ssn = ieee80211_sn_inc(ssn); 435 436 /* 437 * Empty the list. Will have more than one frame for A-MSDU. 438 * Empty list is valid as well since nssn indicates frames were 439 * received. 440 */ 441 while ((skb = __skb_dequeue(skb_list))) { 442 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 443 reorder_buf->queue, 444 sta); 445 reorder_buf->num_stored--; 446 } 447 } 448 reorder_buf->head_sn = nssn; 449 450 set_timer: 451 if (reorder_buf->num_stored && !reorder_buf->removed) { 452 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 453 454 while (skb_queue_empty(&entries[index].e.frames)) 455 index = (index + 1) % reorder_buf->buf_size; 456 /* modify timer to match next frame's expiration time */ 457 mod_timer(&reorder_buf->reorder_timer, 458 entries[index].e.reorder_time + 1 + 459 RX_REORDER_BUF_TIMEOUT_MQ); 460 } else { 461 del_timer(&reorder_buf->reorder_timer); 462 } 463 } 464 465 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 466 { 467 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 468 struct iwl_mvm_baid_data *baid_data = 469 iwl_mvm_baid_data_from_reorder_buf(buf); 470 struct iwl_mvm_reorder_buf_entry *entries = 471 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 472 int i; 473 u16 sn = 0, index = 0; 474 bool expired = false; 475 bool cont = false; 476 477 spin_lock(&buf->lock); 478 479 if (!buf->num_stored || buf->removed) { 480 spin_unlock(&buf->lock); 481 return; 482 } 483 484 for (i = 0; i < buf->buf_size ; i++) { 485 index = (buf->head_sn + i) % buf->buf_size; 486 487 if (skb_queue_empty(&entries[index].e.frames)) { 488 /* 489 * If there is a hole and the next frame didn't expire 490 * we want to break and not advance SN 491 */ 492 cont = false; 493 continue; 494 } 495 if (!cont && 496 !time_after(jiffies, entries[index].e.reorder_time + 497 RX_REORDER_BUF_TIMEOUT_MQ)) 498 break; 499 500 expired = true; 501 /* continue until next hole after this expired frames */ 502 cont = true; 503 sn = ieee80211_sn_add(buf->head_sn, i + 1); 504 } 505 506 if (expired) { 507 struct ieee80211_sta *sta; 508 struct iwl_mvm_sta *mvmsta; 509 u8 sta_id = baid_data->sta_id; 510 511 rcu_read_lock(); 512 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 513 mvmsta = iwl_mvm_sta_from_mac80211(sta); 514 515 /* SN is set to the last expired frame + 1 */ 516 IWL_DEBUG_HT(buf->mvm, 517 "Releasing expired frames for sta %u, sn %d\n", 518 sta_id, sn); 519 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 520 sta, baid_data->tid); 521 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn); 522 rcu_read_unlock(); 523 } else { 524 /* 525 * If no frame expired and there are stored frames, index is now 526 * pointing to the first unexpired frame - modify timer 527 * accordingly to this frame. 528 */ 529 mod_timer(&buf->reorder_timer, 530 entries[index].e.reorder_time + 531 1 + RX_REORDER_BUF_TIMEOUT_MQ); 532 } 533 spin_unlock(&buf->lock); 534 } 535 536 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 537 struct iwl_mvm_delba_data *data) 538 { 539 struct iwl_mvm_baid_data *ba_data; 540 struct ieee80211_sta *sta; 541 struct iwl_mvm_reorder_buffer *reorder_buf; 542 u8 baid = data->baid; 543 544 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 545 return; 546 547 rcu_read_lock(); 548 549 ba_data = rcu_dereference(mvm->baid_map[baid]); 550 if (WARN_ON_ONCE(!ba_data)) 551 goto out; 552 553 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 554 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 555 goto out; 556 557 reorder_buf = &ba_data->reorder_buf[queue]; 558 559 /* release all frames that are in the reorder buffer to the stack */ 560 spin_lock_bh(&reorder_buf->lock); 561 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 562 ieee80211_sn_add(reorder_buf->head_sn, 563 reorder_buf->buf_size)); 564 spin_unlock_bh(&reorder_buf->lock); 565 del_timer_sync(&reorder_buf->reorder_timer); 566 567 out: 568 rcu_read_unlock(); 569 } 570 571 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 572 int queue) 573 { 574 struct iwl_rx_packet *pkt = rxb_addr(rxb); 575 struct iwl_rxq_sync_notification *notif; 576 struct iwl_mvm_internal_rxq_notif *internal_notif; 577 578 notif = (void *)pkt->data; 579 internal_notif = (void *)notif->payload; 580 581 if (internal_notif->sync) { 582 if (mvm->queue_sync_cookie != internal_notif->cookie) { 583 WARN_ONCE(1, 584 "Received expired RX queue sync message\n"); 585 return; 586 } 587 if (!atomic_dec_return(&mvm->queue_sync_counter)) 588 wake_up(&mvm->rx_sync_waitq); 589 } 590 591 switch (internal_notif->type) { 592 case IWL_MVM_RXQ_EMPTY: 593 break; 594 case IWL_MVM_RXQ_NOTIF_DEL_BA: 595 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 596 break; 597 default: 598 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 599 } 600 } 601 602 /* 603 * Returns true if the MPDU was buffered\dropped, false if it should be passed 604 * to upper layer. 605 */ 606 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 607 struct napi_struct *napi, 608 int queue, 609 struct ieee80211_sta *sta, 610 struct sk_buff *skb, 611 struct iwl_rx_mpdu_desc *desc) 612 { 613 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 614 struct iwl_mvm_sta *mvm_sta; 615 struct iwl_mvm_baid_data *baid_data; 616 struct iwl_mvm_reorder_buffer *buffer; 617 struct sk_buff *tail; 618 u32 reorder = le32_to_cpu(desc->reorder_data); 619 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 620 bool last_subframe = 621 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 622 u8 tid = ieee80211_get_tid(hdr); 623 u8 sub_frame_idx = desc->amsdu_info & 624 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 625 struct iwl_mvm_reorder_buf_entry *entries; 626 int index; 627 u16 nssn, sn; 628 u8 baid; 629 630 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 631 IWL_RX_MPDU_REORDER_BAID_SHIFT; 632 633 /* 634 * This also covers the case of receiving a Block Ack Request 635 * outside a BA session; we'll pass it to mac80211 and that 636 * then sends a delBA action frame. 637 */ 638 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 639 return false; 640 641 /* no sta yet */ 642 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 643 "Got valid BAID without a valid station assigned\n")) 644 return false; 645 646 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 647 648 /* not a data packet or a bar */ 649 if (!ieee80211_is_back_req(hdr->frame_control) && 650 (!ieee80211_is_data_qos(hdr->frame_control) || 651 is_multicast_ether_addr(hdr->addr1))) 652 return false; 653 654 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 655 return false; 656 657 baid_data = rcu_dereference(mvm->baid_map[baid]); 658 if (!baid_data) { 659 IWL_DEBUG_RX(mvm, 660 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 661 baid, reorder); 662 return false; 663 } 664 665 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 666 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 667 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 668 tid)) 669 return false; 670 671 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 672 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 673 IWL_RX_MPDU_REORDER_SN_SHIFT; 674 675 buffer = &baid_data->reorder_buf[queue]; 676 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 677 678 spin_lock_bh(&buffer->lock); 679 680 if (!buffer->valid) { 681 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 682 spin_unlock_bh(&buffer->lock); 683 return false; 684 } 685 buffer->valid = true; 686 } 687 688 if (ieee80211_is_back_req(hdr->frame_control)) { 689 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 690 goto drop; 691 } 692 693 /* 694 * If there was a significant jump in the nssn - adjust. 695 * If the SN is smaller than the NSSN it might need to first go into 696 * the reorder buffer, in which case we just release up to it and the 697 * rest of the function will take care of storing it and releasing up to 698 * the nssn 699 */ 700 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 701 buffer->buf_size) || 702 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 703 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 704 705 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 706 min_sn); 707 } 708 709 /* drop any oudated packets */ 710 if (ieee80211_sn_less(sn, buffer->head_sn)) 711 goto drop; 712 713 /* release immediately if allowed by nssn and no stored frames */ 714 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 715 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 716 buffer->buf_size) && 717 (!amsdu || last_subframe)) 718 buffer->head_sn = nssn; 719 /* No need to update AMSDU last SN - we are moving the head */ 720 spin_unlock_bh(&buffer->lock); 721 return false; 722 } 723 724 /* 725 * release immediately if there are no stored frames, and the sn is 726 * equal to the head. 727 * This can happen due to reorder timer, where NSSN is behind head_sn. 728 * When we released everything, and we got the next frame in the 729 * sequence, according to the NSSN we can't release immediately, 730 * while technically there is no hole and we can move forward. 731 */ 732 if (!buffer->num_stored && sn == buffer->head_sn) { 733 if (!amsdu || last_subframe) 734 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 735 /* No need to update AMSDU last SN - we are moving the head */ 736 spin_unlock_bh(&buffer->lock); 737 return false; 738 } 739 740 index = sn % buffer->buf_size; 741 742 /* 743 * Check if we already stored this frame 744 * As AMSDU is either received or not as whole, logic is simple: 745 * If we have frames in that position in the buffer and the last frame 746 * originated from AMSDU had a different SN then it is a retransmission. 747 * If it is the same SN then if the subframe index is incrementing it 748 * is the same AMSDU - otherwise it is a retransmission. 749 */ 750 tail = skb_peek_tail(&entries[index].e.frames); 751 if (tail && !amsdu) 752 goto drop; 753 else if (tail && (sn != buffer->last_amsdu || 754 buffer->last_sub_index >= sub_frame_idx)) 755 goto drop; 756 757 /* put in reorder buffer */ 758 __skb_queue_tail(&entries[index].e.frames, skb); 759 buffer->num_stored++; 760 entries[index].e.reorder_time = jiffies; 761 762 if (amsdu) { 763 buffer->last_amsdu = sn; 764 buffer->last_sub_index = sub_frame_idx; 765 } 766 767 /* 768 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 769 * The reason is that NSSN advances on the first sub-frame, and may 770 * cause the reorder buffer to advance before all the sub-frames arrive. 771 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 772 * SN 1. NSSN for first sub frame will be 3 with the result of driver 773 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 774 * already ahead and it will be dropped. 775 * If the last sub-frame is not on this queue - we will get frame 776 * release notification with up to date NSSN. 777 */ 778 if (!amsdu || last_subframe) 779 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 780 781 spin_unlock_bh(&buffer->lock); 782 return true; 783 784 drop: 785 kfree_skb(skb); 786 spin_unlock_bh(&buffer->lock); 787 return true; 788 } 789 790 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 791 u32 reorder_data, u8 baid) 792 { 793 unsigned long now = jiffies; 794 unsigned long timeout; 795 struct iwl_mvm_baid_data *data; 796 797 rcu_read_lock(); 798 799 data = rcu_dereference(mvm->baid_map[baid]); 800 if (!data) { 801 IWL_DEBUG_RX(mvm, 802 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 803 baid, reorder_data); 804 goto out; 805 } 806 807 if (!data->timeout) 808 goto out; 809 810 timeout = data->timeout; 811 /* 812 * Do not update last rx all the time to avoid cache bouncing 813 * between the rx queues. 814 * Update it every timeout. Worst case is the session will 815 * expire after ~ 2 * timeout, which doesn't matter that much. 816 */ 817 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 818 /* Update is atomic */ 819 data->last_rx = now; 820 821 out: 822 rcu_read_unlock(); 823 } 824 825 static void iwl_mvm_flip_address(u8 *addr) 826 { 827 int i; 828 u8 mac_addr[ETH_ALEN]; 829 830 for (i = 0; i < ETH_ALEN; i++) 831 mac_addr[i] = addr[ETH_ALEN - i - 1]; 832 ether_addr_copy(addr, mac_addr); 833 } 834 835 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 836 struct iwl_rx_cmd_buffer *rxb, int queue) 837 { 838 struct ieee80211_rx_status *rx_status; 839 struct iwl_rx_packet *pkt = rxb_addr(rxb); 840 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 841 struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc)); 842 u32 len = le16_to_cpu(desc->mpdu_len); 843 u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags); 844 u16 phy_info = le16_to_cpu(desc->phy_info); 845 struct ieee80211_sta *sta = NULL; 846 struct sk_buff *skb; 847 u8 crypt_len = 0; 848 849 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 850 return; 851 852 /* Dont use dev_alloc_skb(), we'll have enough headroom once 853 * ieee80211_hdr pulled. 854 */ 855 skb = alloc_skb(128, GFP_ATOMIC); 856 if (!skb) { 857 IWL_ERR(mvm, "alloc_skb failed\n"); 858 return; 859 } 860 861 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 862 /* 863 * If the device inserted padding it means that (it thought) 864 * the 802.11 header wasn't a multiple of 4 bytes long. In 865 * this case, reserve two bytes at the start of the SKB to 866 * align the payload properly in case we end up copying it. 867 */ 868 skb_reserve(skb, 2); 869 } 870 871 rx_status = IEEE80211_SKB_RXCB(skb); 872 873 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, 874 le32_to_cpu(pkt->len_n_flags), queue, 875 &crypt_len)) { 876 kfree_skb(skb); 877 return; 878 } 879 880 /* 881 * Keep packets with CRC errors (and with overrun) for monitor mode 882 * (otherwise the firmware discards them) but mark them as bad. 883 */ 884 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || 885 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 886 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 887 le16_to_cpu(desc->status)); 888 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 889 } 890 /* set the preamble flag if appropriate */ 891 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 892 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 893 894 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 895 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise); 896 /* TSF as indicated by the firmware is at INA time */ 897 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 898 } 899 rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise); 900 rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ : 901 NL80211_BAND_2GHZ; 902 rx_status->freq = ieee80211_channel_to_frequency(desc->channel, 903 rx_status->band); 904 iwl_mvm_get_signal_strength(mvm, desc, rx_status); 905 906 /* update aggregation data for monitor sake on default queue */ 907 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 908 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 909 910 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 911 rx_status->ampdu_reference = mvm->ampdu_ref; 912 /* toggle is switched whenever new aggregation starts */ 913 if (toggle_bit != mvm->ampdu_toggle) { 914 mvm->ampdu_ref++; 915 mvm->ampdu_toggle = toggle_bit; 916 } 917 } 918 919 rcu_read_lock(); 920 921 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 922 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; 923 924 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 925 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 926 if (IS_ERR(sta)) 927 sta = NULL; 928 } 929 } else if (!is_multicast_ether_addr(hdr->addr2)) { 930 /* 931 * This is fine since we prevent two stations with the same 932 * address from being added. 933 */ 934 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 935 } 936 937 if (sta) { 938 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 939 struct ieee80211_vif *tx_blocked_vif = 940 rcu_dereference(mvm->csa_tx_blocked_vif); 941 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 942 IWL_RX_MPDU_REORDER_BAID_MASK) >> 943 IWL_RX_MPDU_REORDER_BAID_SHIFT); 944 945 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 946 !is_multicast_ether_addr(hdr->addr1) && 947 ieee80211_is_data(hdr->frame_control) && 948 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 949 schedule_delayed_work(&mvm->tcm.work, 0); 950 951 /* 952 * We have tx blocked stations (with CS bit). If we heard 953 * frames from a blocked station on a new channel we can 954 * TX to it again. 955 */ 956 if (unlikely(tx_blocked_vif) && 957 tx_blocked_vif == mvmsta->vif) { 958 struct iwl_mvm_vif *mvmvif = 959 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 960 961 if (mvmvif->csa_target_freq == rx_status->freq) 962 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 963 false); 964 } 965 966 rs_update_last_rssi(mvm, mvmsta, rx_status); 967 968 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 969 ieee80211_is_beacon(hdr->frame_control)) { 970 struct iwl_fw_dbg_trigger_tlv *trig; 971 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 972 bool trig_check; 973 s32 rssi; 974 975 trig = iwl_fw_dbg_get_trigger(mvm->fw, 976 FW_DBG_TRIGGER_RSSI); 977 rssi_trig = (void *)trig->data; 978 rssi = le32_to_cpu(rssi_trig->rssi); 979 980 trig_check = 981 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 982 ieee80211_vif_to_wdev(mvmsta->vif), 983 trig); 984 if (trig_check && rx_status->signal < rssi) 985 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 986 NULL); 987 } 988 989 if (ieee80211_is_data(hdr->frame_control)) 990 iwl_mvm_rx_csum(sta, skb, desc); 991 992 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 993 kfree_skb(skb); 994 goto out; 995 } 996 997 /* 998 * Our hardware de-aggregates AMSDUs but copies the mac header 999 * as it to the de-aggregated MPDUs. We need to turn off the 1000 * AMSDU bit in the QoS control ourselves. 1001 * In addition, HW reverses addr3 and addr4 - reverse it back. 1002 */ 1003 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1004 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1005 u8 *qc = ieee80211_get_qos_ctl(hdr); 1006 1007 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1008 1009 if (mvm->trans->cfg->device_family == 1010 IWL_DEVICE_FAMILY_9000) { 1011 iwl_mvm_flip_address(hdr->addr3); 1012 1013 if (ieee80211_has_a4(hdr->frame_control)) 1014 iwl_mvm_flip_address(hdr->addr4); 1015 } 1016 } 1017 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1018 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1019 1020 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1021 } 1022 } 1023 1024 /* Set up the HT phy flags */ 1025 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1026 case RATE_MCS_CHAN_WIDTH_20: 1027 break; 1028 case RATE_MCS_CHAN_WIDTH_40: 1029 rx_status->bw = RATE_INFO_BW_40; 1030 break; 1031 case RATE_MCS_CHAN_WIDTH_80: 1032 rx_status->bw = RATE_INFO_BW_80; 1033 break; 1034 case RATE_MCS_CHAN_WIDTH_160: 1035 rx_status->bw = RATE_INFO_BW_160; 1036 break; 1037 } 1038 1039 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1040 rate_n_flags & RATE_MCS_SGI_MSK) 1041 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1042 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1043 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1044 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1045 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1046 if (rate_n_flags & RATE_MCS_HT_MSK) { 1047 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1048 RATE_MCS_STBC_POS; 1049 rx_status->encoding = RX_ENC_HT; 1050 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1051 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1052 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1053 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1054 RATE_MCS_STBC_POS; 1055 rx_status->nss = 1056 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1057 RATE_VHT_MCS_NSS_POS) + 1; 1058 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1059 rx_status->encoding = RX_ENC_VHT; 1060 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1061 if (rate_n_flags & RATE_MCS_BF_MSK) 1062 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1063 } else { 1064 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1065 rx_status->band); 1066 1067 if (WARN(rate < 0 || rate > 0xFF, 1068 "Invalid rate flags 0x%x, band %d,\n", 1069 rate_n_flags, rx_status->band)) { 1070 kfree_skb(skb); 1071 goto out; 1072 } 1073 rx_status->rate_idx = rate; 1074 1075 } 1076 1077 /* management stuff on default queue */ 1078 if (!queue) { 1079 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 1080 ieee80211_is_probe_resp(hdr->frame_control)) && 1081 mvm->sched_scan_pass_all == 1082 SCHED_SCAN_PASS_ALL_ENABLED)) 1083 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 1084 1085 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 1086 ieee80211_is_probe_resp(hdr->frame_control))) 1087 rx_status->boottime_ns = ktime_get_boot_ns(); 1088 } 1089 1090 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); 1091 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 1092 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); 1093 out: 1094 rcu_read_unlock(); 1095 } 1096 1097 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 1098 struct iwl_rx_cmd_buffer *rxb, int queue) 1099 { 1100 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1101 struct iwl_frame_release *release = (void *)pkt->data; 1102 struct ieee80211_sta *sta; 1103 struct iwl_mvm_reorder_buffer *reorder_buf; 1104 struct iwl_mvm_baid_data *ba_data; 1105 1106 int baid = release->baid; 1107 1108 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 1109 release->baid, le16_to_cpu(release->nssn)); 1110 1111 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1112 return; 1113 1114 rcu_read_lock(); 1115 1116 ba_data = rcu_dereference(mvm->baid_map[baid]); 1117 if (WARN_ON_ONCE(!ba_data)) 1118 goto out; 1119 1120 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 1121 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1122 goto out; 1123 1124 reorder_buf = &ba_data->reorder_buf[queue]; 1125 1126 spin_lock_bh(&reorder_buf->lock); 1127 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf, 1128 le16_to_cpu(release->nssn)); 1129 spin_unlock_bh(&reorder_buf->lock); 1130 1131 out: 1132 rcu_read_unlock(); 1133 } 1134