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, u16 phy_info, 231 struct iwl_rx_mpdu_desc *desc, 232 u32 pkt_flags, int queue, u8 *crypt_len) 233 { 234 u16 status = le16_to_cpu(desc->status); 235 236 /* 237 * Drop UNKNOWN frames in aggregation, unless in monitor mode 238 * (where we don't have the keys). 239 * We limit this to aggregation because in TKIP this is a valid 240 * scenario, since we may not have the (correct) TTAK (phase 1 241 * key) in the firmware. 242 */ 243 if (phy_info & IWL_RX_MPDU_PHY_AMPDU && 244 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 245 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on) 246 return -1; 247 248 if (!ieee80211_has_protected(hdr->frame_control) || 249 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 250 IWL_RX_MPDU_STATUS_SEC_NONE) 251 return 0; 252 253 /* TODO: handle packets encrypted with unknown alg */ 254 255 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 256 case IWL_RX_MPDU_STATUS_SEC_CCM: 257 case IWL_RX_MPDU_STATUS_SEC_GCM: 258 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 259 /* alg is CCM: check MIC only */ 260 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 261 return -1; 262 263 stats->flag |= RX_FLAG_DECRYPTED; 264 if (pkt_flags & FH_RSCSR_RADA_EN) 265 stats->flag |= RX_FLAG_MIC_STRIPPED; 266 *crypt_len = IEEE80211_CCMP_HDR_LEN; 267 return 0; 268 case IWL_RX_MPDU_STATUS_SEC_TKIP: 269 /* Don't drop the frame and decrypt it in SW */ 270 if (!fw_has_api(&mvm->fw->ucode_capa, 271 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 272 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 273 return 0; 274 275 *crypt_len = IEEE80211_TKIP_IV_LEN; 276 /* fall through if TTAK OK */ 277 case IWL_RX_MPDU_STATUS_SEC_WEP: 278 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 279 return -1; 280 281 stats->flag |= RX_FLAG_DECRYPTED; 282 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 283 IWL_RX_MPDU_STATUS_SEC_WEP) 284 *crypt_len = IEEE80211_WEP_IV_LEN; 285 286 if (pkt_flags & FH_RSCSR_RADA_EN) 287 stats->flag |= RX_FLAG_ICV_STRIPPED; 288 289 return 0; 290 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 291 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 292 return -1; 293 stats->flag |= RX_FLAG_DECRYPTED; 294 return 0; 295 default: 296 /* Expected in monitor (not having the keys) */ 297 if (!mvm->monitor_on) 298 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 299 } 300 301 return 0; 302 } 303 304 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 305 struct sk_buff *skb, 306 struct iwl_rx_mpdu_desc *desc) 307 { 308 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 309 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 310 u16 flags = le16_to_cpu(desc->l3l4_flags); 311 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 312 IWL_RX_L3_PROTO_POS); 313 314 if (mvmvif->features & NETIF_F_RXCSUM && 315 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 316 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 317 l3_prot == IWL_RX_L3_TYPE_IPV6 || 318 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 319 skb->ip_summed = CHECKSUM_UNNECESSARY; 320 } 321 322 /* 323 * returns true if a packet is a duplicate and should be dropped. 324 * Updates AMSDU PN tracking info 325 */ 326 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 327 struct ieee80211_rx_status *rx_status, 328 struct ieee80211_hdr *hdr, 329 struct iwl_rx_mpdu_desc *desc) 330 { 331 struct iwl_mvm_sta *mvm_sta; 332 struct iwl_mvm_rxq_dup_data *dup_data; 333 u8 tid, sub_frame_idx; 334 335 if (WARN_ON(IS_ERR_OR_NULL(sta))) 336 return false; 337 338 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 339 dup_data = &mvm_sta->dup_data[queue]; 340 341 /* 342 * Drop duplicate 802.11 retransmissions 343 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 344 */ 345 if (ieee80211_is_ctl(hdr->frame_control) || 346 ieee80211_is_qos_nullfunc(hdr->frame_control) || 347 is_multicast_ether_addr(hdr->addr1)) { 348 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 349 return false; 350 } 351 352 if (ieee80211_is_data_qos(hdr->frame_control)) 353 /* frame has qos control */ 354 tid = ieee80211_get_tid(hdr); 355 else 356 tid = IWL_MAX_TID_COUNT; 357 358 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 359 sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 360 361 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 362 dup_data->last_seq[tid] == hdr->seq_ctrl && 363 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 364 return true; 365 366 /* Allow same PN as the first subframe for following sub frames */ 367 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 368 sub_frame_idx > dup_data->last_sub_frame[tid] && 369 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 370 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 371 372 dup_data->last_seq[tid] = hdr->seq_ctrl; 373 dup_data->last_sub_frame[tid] = sub_frame_idx; 374 375 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 376 377 return false; 378 } 379 380 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, 381 const u8 *data, u32 count) 382 { 383 struct iwl_rxq_sync_cmd *cmd; 384 u32 data_size = sizeof(*cmd) + count; 385 int ret; 386 387 /* should be DWORD aligned */ 388 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) 389 return -EINVAL; 390 391 cmd = kzalloc(data_size, GFP_KERNEL); 392 if (!cmd) 393 return -ENOMEM; 394 395 cmd->rxq_mask = cpu_to_le32(rxq_mask); 396 cmd->count = cpu_to_le32(count); 397 cmd->flags = 0; 398 memcpy(cmd->payload, data, count); 399 400 ret = iwl_mvm_send_cmd_pdu(mvm, 401 WIDE_ID(DATA_PATH_GROUP, 402 TRIGGER_RX_QUEUES_NOTIF_CMD), 403 0, data_size, cmd); 404 405 kfree(cmd); 406 return ret; 407 } 408 409 /* 410 * Returns true if sn2 - buffer_size < sn1 < sn2. 411 * To be used only in order to compare reorder buffer head with NSSN. 412 * We fully trust NSSN unless it is behind us due to reorder timeout. 413 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 414 */ 415 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 416 { 417 return ieee80211_sn_less(sn1, sn2) && 418 !ieee80211_sn_less(sn1, sn2 - buffer_size); 419 } 420 421 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 422 423 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 424 struct ieee80211_sta *sta, 425 struct napi_struct *napi, 426 struct iwl_mvm_baid_data *baid_data, 427 struct iwl_mvm_reorder_buffer *reorder_buf, 428 u16 nssn) 429 { 430 struct iwl_mvm_reorder_buf_entry *entries = 431 &baid_data->entries[reorder_buf->queue * 432 baid_data->entries_per_queue]; 433 u16 ssn = reorder_buf->head_sn; 434 435 lockdep_assert_held(&reorder_buf->lock); 436 437 /* ignore nssn smaller than head sn - this can happen due to timeout */ 438 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 439 goto set_timer; 440 441 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 442 int index = ssn % reorder_buf->buf_size; 443 struct sk_buff_head *skb_list = &entries[index].e.frames; 444 struct sk_buff *skb; 445 446 ssn = ieee80211_sn_inc(ssn); 447 448 /* 449 * Empty the list. Will have more than one frame for A-MSDU. 450 * Empty list is valid as well since nssn indicates frames were 451 * received. 452 */ 453 while ((skb = __skb_dequeue(skb_list))) { 454 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 455 reorder_buf->queue, 456 sta); 457 reorder_buf->num_stored--; 458 } 459 } 460 reorder_buf->head_sn = nssn; 461 462 set_timer: 463 if (reorder_buf->num_stored && !reorder_buf->removed) { 464 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 465 466 while (skb_queue_empty(&entries[index].e.frames)) 467 index = (index + 1) % reorder_buf->buf_size; 468 /* modify timer to match next frame's expiration time */ 469 mod_timer(&reorder_buf->reorder_timer, 470 entries[index].e.reorder_time + 1 + 471 RX_REORDER_BUF_TIMEOUT_MQ); 472 } else { 473 del_timer(&reorder_buf->reorder_timer); 474 } 475 } 476 477 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 478 { 479 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 480 struct iwl_mvm_baid_data *baid_data = 481 iwl_mvm_baid_data_from_reorder_buf(buf); 482 struct iwl_mvm_reorder_buf_entry *entries = 483 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 484 int i; 485 u16 sn = 0, index = 0; 486 bool expired = false; 487 bool cont = false; 488 489 spin_lock(&buf->lock); 490 491 if (!buf->num_stored || buf->removed) { 492 spin_unlock(&buf->lock); 493 return; 494 } 495 496 for (i = 0; i < buf->buf_size ; i++) { 497 index = (buf->head_sn + i) % buf->buf_size; 498 499 if (skb_queue_empty(&entries[index].e.frames)) { 500 /* 501 * If there is a hole and the next frame didn't expire 502 * we want to break and not advance SN 503 */ 504 cont = false; 505 continue; 506 } 507 if (!cont && 508 !time_after(jiffies, entries[index].e.reorder_time + 509 RX_REORDER_BUF_TIMEOUT_MQ)) 510 break; 511 512 expired = true; 513 /* continue until next hole after this expired frames */ 514 cont = true; 515 sn = ieee80211_sn_add(buf->head_sn, i + 1); 516 } 517 518 if (expired) { 519 struct ieee80211_sta *sta; 520 struct iwl_mvm_sta *mvmsta; 521 u8 sta_id = baid_data->sta_id; 522 523 rcu_read_lock(); 524 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 525 mvmsta = iwl_mvm_sta_from_mac80211(sta); 526 527 /* SN is set to the last expired frame + 1 */ 528 IWL_DEBUG_HT(buf->mvm, 529 "Releasing expired frames for sta %u, sn %d\n", 530 sta_id, sn); 531 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 532 sta, baid_data->tid); 533 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn); 534 rcu_read_unlock(); 535 } else { 536 /* 537 * If no frame expired and there are stored frames, index is now 538 * pointing to the first unexpired frame - modify timer 539 * accordingly to this frame. 540 */ 541 mod_timer(&buf->reorder_timer, 542 entries[index].e.reorder_time + 543 1 + RX_REORDER_BUF_TIMEOUT_MQ); 544 } 545 spin_unlock(&buf->lock); 546 } 547 548 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 549 struct iwl_mvm_delba_data *data) 550 { 551 struct iwl_mvm_baid_data *ba_data; 552 struct ieee80211_sta *sta; 553 struct iwl_mvm_reorder_buffer *reorder_buf; 554 u8 baid = data->baid; 555 556 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 557 return; 558 559 rcu_read_lock(); 560 561 ba_data = rcu_dereference(mvm->baid_map[baid]); 562 if (WARN_ON_ONCE(!ba_data)) 563 goto out; 564 565 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 566 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 567 goto out; 568 569 reorder_buf = &ba_data->reorder_buf[queue]; 570 571 /* release all frames that are in the reorder buffer to the stack */ 572 spin_lock_bh(&reorder_buf->lock); 573 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 574 ieee80211_sn_add(reorder_buf->head_sn, 575 reorder_buf->buf_size)); 576 spin_unlock_bh(&reorder_buf->lock); 577 del_timer_sync(&reorder_buf->reorder_timer); 578 579 out: 580 rcu_read_unlock(); 581 } 582 583 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 584 int queue) 585 { 586 struct iwl_rx_packet *pkt = rxb_addr(rxb); 587 struct iwl_rxq_sync_notification *notif; 588 struct iwl_mvm_internal_rxq_notif *internal_notif; 589 590 notif = (void *)pkt->data; 591 internal_notif = (void *)notif->payload; 592 593 if (internal_notif->sync && 594 mvm->queue_sync_cookie != internal_notif->cookie) { 595 WARN_ONCE(1, "Received expired RX queue sync message\n"); 596 return; 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 if (internal_notif->sync && 610 !atomic_dec_return(&mvm->queue_sync_counter)) 611 wake_up(&mvm->rx_sync_waitq); 612 } 613 614 /* 615 * Returns true if the MPDU was buffered\dropped, false if it should be passed 616 * to upper layer. 617 */ 618 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 619 struct napi_struct *napi, 620 int queue, 621 struct ieee80211_sta *sta, 622 struct sk_buff *skb, 623 struct iwl_rx_mpdu_desc *desc) 624 { 625 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 626 struct iwl_mvm_sta *mvm_sta; 627 struct iwl_mvm_baid_data *baid_data; 628 struct iwl_mvm_reorder_buffer *buffer; 629 struct sk_buff *tail; 630 u32 reorder = le32_to_cpu(desc->reorder_data); 631 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 632 bool last_subframe = 633 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 634 u8 tid = ieee80211_get_tid(hdr); 635 u8 sub_frame_idx = desc->amsdu_info & 636 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 637 struct iwl_mvm_reorder_buf_entry *entries; 638 int index; 639 u16 nssn, sn; 640 u8 baid; 641 642 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 643 IWL_RX_MPDU_REORDER_BAID_SHIFT; 644 645 /* 646 * This also covers the case of receiving a Block Ack Request 647 * outside a BA session; we'll pass it to mac80211 and that 648 * then sends a delBA action frame. 649 */ 650 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 651 return false; 652 653 /* no sta yet */ 654 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 655 "Got valid BAID without a valid station assigned\n")) 656 return false; 657 658 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 659 660 /* not a data packet or a bar */ 661 if (!ieee80211_is_back_req(hdr->frame_control) && 662 (!ieee80211_is_data_qos(hdr->frame_control) || 663 is_multicast_ether_addr(hdr->addr1))) 664 return false; 665 666 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 667 return false; 668 669 baid_data = rcu_dereference(mvm->baid_map[baid]); 670 if (!baid_data) { 671 IWL_DEBUG_RX(mvm, 672 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 673 baid, reorder); 674 return false; 675 } 676 677 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 678 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 679 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 680 tid)) 681 return false; 682 683 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 684 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 685 IWL_RX_MPDU_REORDER_SN_SHIFT; 686 687 buffer = &baid_data->reorder_buf[queue]; 688 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 689 690 spin_lock_bh(&buffer->lock); 691 692 if (!buffer->valid) { 693 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 694 spin_unlock_bh(&buffer->lock); 695 return false; 696 } 697 buffer->valid = true; 698 } 699 700 if (ieee80211_is_back_req(hdr->frame_control)) { 701 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 702 goto drop; 703 } 704 705 /* 706 * If there was a significant jump in the nssn - adjust. 707 * If the SN is smaller than the NSSN it might need to first go into 708 * the reorder buffer, in which case we just release up to it and the 709 * rest of the function will take care of storing it and releasing up to 710 * the nssn 711 */ 712 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 713 buffer->buf_size) || 714 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 715 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 716 717 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 718 min_sn); 719 } 720 721 /* drop any oudated packets */ 722 if (ieee80211_sn_less(sn, buffer->head_sn)) 723 goto drop; 724 725 /* release immediately if allowed by nssn and no stored frames */ 726 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 727 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 728 buffer->buf_size) && 729 (!amsdu || last_subframe)) 730 buffer->head_sn = nssn; 731 /* No need to update AMSDU last SN - we are moving the head */ 732 spin_unlock_bh(&buffer->lock); 733 return false; 734 } 735 736 /* 737 * release immediately if there are no stored frames, and the sn is 738 * equal to the head. 739 * This can happen due to reorder timer, where NSSN is behind head_sn. 740 * When we released everything, and we got the next frame in the 741 * sequence, according to the NSSN we can't release immediately, 742 * while technically there is no hole and we can move forward. 743 */ 744 if (!buffer->num_stored && sn == buffer->head_sn) { 745 if (!amsdu || last_subframe) 746 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 747 /* No need to update AMSDU last SN - we are moving the head */ 748 spin_unlock_bh(&buffer->lock); 749 return false; 750 } 751 752 index = sn % buffer->buf_size; 753 754 /* 755 * Check if we already stored this frame 756 * As AMSDU is either received or not as whole, logic is simple: 757 * If we have frames in that position in the buffer and the last frame 758 * originated from AMSDU had a different SN then it is a retransmission. 759 * If it is the same SN then if the subframe index is incrementing it 760 * is the same AMSDU - otherwise it is a retransmission. 761 */ 762 tail = skb_peek_tail(&entries[index].e.frames); 763 if (tail && !amsdu) 764 goto drop; 765 else if (tail && (sn != buffer->last_amsdu || 766 buffer->last_sub_index >= sub_frame_idx)) 767 goto drop; 768 769 /* put in reorder buffer */ 770 __skb_queue_tail(&entries[index].e.frames, skb); 771 buffer->num_stored++; 772 entries[index].e.reorder_time = jiffies; 773 774 if (amsdu) { 775 buffer->last_amsdu = sn; 776 buffer->last_sub_index = sub_frame_idx; 777 } 778 779 /* 780 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 781 * The reason is that NSSN advances on the first sub-frame, and may 782 * cause the reorder buffer to advance before all the sub-frames arrive. 783 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 784 * SN 1. NSSN for first sub frame will be 3 with the result of driver 785 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 786 * already ahead and it will be dropped. 787 * If the last sub-frame is not on this queue - we will get frame 788 * release notification with up to date NSSN. 789 */ 790 if (!amsdu || last_subframe) 791 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 792 793 spin_unlock_bh(&buffer->lock); 794 return true; 795 796 drop: 797 kfree_skb(skb); 798 spin_unlock_bh(&buffer->lock); 799 return true; 800 } 801 802 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 803 u32 reorder_data, u8 baid) 804 { 805 unsigned long now = jiffies; 806 unsigned long timeout; 807 struct iwl_mvm_baid_data *data; 808 809 rcu_read_lock(); 810 811 data = rcu_dereference(mvm->baid_map[baid]); 812 if (!data) { 813 IWL_DEBUG_RX(mvm, 814 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 815 baid, reorder_data); 816 goto out; 817 } 818 819 if (!data->timeout) 820 goto out; 821 822 timeout = data->timeout; 823 /* 824 * Do not update last rx all the time to avoid cache bouncing 825 * between the rx queues. 826 * Update it every timeout. Worst case is the session will 827 * expire after ~ 2 * timeout, which doesn't matter that much. 828 */ 829 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 830 /* Update is atomic */ 831 data->last_rx = now; 832 833 out: 834 rcu_read_unlock(); 835 } 836 837 static void iwl_mvm_flip_address(u8 *addr) 838 { 839 int i; 840 u8 mac_addr[ETH_ALEN]; 841 842 for (i = 0; i < ETH_ALEN; i++) 843 mac_addr[i] = addr[ETH_ALEN - i - 1]; 844 ether_addr_copy(addr, mac_addr); 845 } 846 847 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 848 struct iwl_rx_cmd_buffer *rxb, int queue) 849 { 850 struct ieee80211_rx_status *rx_status; 851 struct iwl_rx_packet *pkt = rxb_addr(rxb); 852 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 853 struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc)); 854 u32 len = le16_to_cpu(desc->mpdu_len); 855 u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags); 856 u16 phy_info = le16_to_cpu(desc->phy_info); 857 struct ieee80211_sta *sta = NULL; 858 struct sk_buff *skb; 859 u8 crypt_len = 0; 860 861 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 862 return; 863 864 /* Dont use dev_alloc_skb(), we'll have enough headroom once 865 * ieee80211_hdr pulled. 866 */ 867 skb = alloc_skb(128, GFP_ATOMIC); 868 if (!skb) { 869 IWL_ERR(mvm, "alloc_skb failed\n"); 870 return; 871 } 872 873 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 874 /* 875 * If the device inserted padding it means that (it thought) 876 * the 802.11 header wasn't a multiple of 4 bytes long. In 877 * this case, reserve two bytes at the start of the SKB to 878 * align the payload properly in case we end up copying it. 879 */ 880 skb_reserve(skb, 2); 881 } 882 883 rx_status = IEEE80211_SKB_RXCB(skb); 884 885 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc, 886 le32_to_cpu(pkt->len_n_flags), queue, 887 &crypt_len)) { 888 kfree_skb(skb); 889 return; 890 } 891 892 /* 893 * Keep packets with CRC errors (and with overrun) for monitor mode 894 * (otherwise the firmware discards them) but mark them as bad. 895 */ 896 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || 897 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 898 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 899 le16_to_cpu(desc->status)); 900 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 901 } 902 /* set the preamble flag if appropriate */ 903 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 904 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 905 906 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 907 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise); 908 /* TSF as indicated by the firmware is at INA time */ 909 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 910 } 911 rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise); 912 rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ : 913 NL80211_BAND_2GHZ; 914 rx_status->freq = ieee80211_channel_to_frequency(desc->channel, 915 rx_status->band); 916 iwl_mvm_get_signal_strength(mvm, desc, rx_status); 917 918 /* update aggregation data for monitor sake on default queue */ 919 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 920 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 921 922 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 923 rx_status->ampdu_reference = mvm->ampdu_ref; 924 /* toggle is switched whenever new aggregation starts */ 925 if (toggle_bit != mvm->ampdu_toggle) { 926 mvm->ampdu_ref++; 927 mvm->ampdu_toggle = toggle_bit; 928 } 929 } 930 931 rcu_read_lock(); 932 933 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 934 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; 935 936 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 937 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 938 if (IS_ERR(sta)) 939 sta = NULL; 940 } 941 } else if (!is_multicast_ether_addr(hdr->addr2)) { 942 /* 943 * This is fine since we prevent two stations with the same 944 * address from being added. 945 */ 946 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 947 } 948 949 if (sta) { 950 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 951 struct ieee80211_vif *tx_blocked_vif = 952 rcu_dereference(mvm->csa_tx_blocked_vif); 953 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 954 IWL_RX_MPDU_REORDER_BAID_MASK) >> 955 IWL_RX_MPDU_REORDER_BAID_SHIFT); 956 957 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 958 !is_multicast_ether_addr(hdr->addr1) && 959 ieee80211_is_data(hdr->frame_control) && 960 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 961 schedule_delayed_work(&mvm->tcm.work, 0); 962 963 /* 964 * We have tx blocked stations (with CS bit). If we heard 965 * frames from a blocked station on a new channel we can 966 * TX to it again. 967 */ 968 if (unlikely(tx_blocked_vif) && 969 tx_blocked_vif == mvmsta->vif) { 970 struct iwl_mvm_vif *mvmvif = 971 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 972 973 if (mvmvif->csa_target_freq == rx_status->freq) 974 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 975 false); 976 } 977 978 rs_update_last_rssi(mvm, mvmsta, rx_status); 979 980 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 981 ieee80211_is_beacon(hdr->frame_control)) { 982 struct iwl_fw_dbg_trigger_tlv *trig; 983 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 984 bool trig_check; 985 s32 rssi; 986 987 trig = iwl_fw_dbg_get_trigger(mvm->fw, 988 FW_DBG_TRIGGER_RSSI); 989 rssi_trig = (void *)trig->data; 990 rssi = le32_to_cpu(rssi_trig->rssi); 991 992 trig_check = 993 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 994 ieee80211_vif_to_wdev(mvmsta->vif), 995 trig); 996 if (trig_check && rx_status->signal < rssi) 997 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 998 NULL); 999 } 1000 1001 if (ieee80211_is_data(hdr->frame_control)) 1002 iwl_mvm_rx_csum(sta, skb, desc); 1003 1004 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1005 kfree_skb(skb); 1006 goto out; 1007 } 1008 1009 /* 1010 * Our hardware de-aggregates AMSDUs but copies the mac header 1011 * as it to the de-aggregated MPDUs. We need to turn off the 1012 * AMSDU bit in the QoS control ourselves. 1013 * In addition, HW reverses addr3 and addr4 - reverse it back. 1014 */ 1015 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1016 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1017 u8 *qc = ieee80211_get_qos_ctl(hdr); 1018 1019 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1020 1021 if (mvm->trans->cfg->device_family == 1022 IWL_DEVICE_FAMILY_9000) { 1023 iwl_mvm_flip_address(hdr->addr3); 1024 1025 if (ieee80211_has_a4(hdr->frame_control)) 1026 iwl_mvm_flip_address(hdr->addr4); 1027 } 1028 } 1029 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1030 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1031 1032 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1033 } 1034 } 1035 1036 /* Set up the HT phy flags */ 1037 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1038 case RATE_MCS_CHAN_WIDTH_20: 1039 break; 1040 case RATE_MCS_CHAN_WIDTH_40: 1041 rx_status->bw = RATE_INFO_BW_40; 1042 break; 1043 case RATE_MCS_CHAN_WIDTH_80: 1044 rx_status->bw = RATE_INFO_BW_80; 1045 break; 1046 case RATE_MCS_CHAN_WIDTH_160: 1047 rx_status->bw = RATE_INFO_BW_160; 1048 break; 1049 } 1050 1051 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1052 rate_n_flags & RATE_MCS_SGI_MSK) 1053 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1054 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1055 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1056 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1057 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1058 if (rate_n_flags & RATE_MCS_HT_MSK) { 1059 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1060 RATE_MCS_STBC_POS; 1061 rx_status->encoding = RX_ENC_HT; 1062 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1063 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1064 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1065 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1066 RATE_MCS_STBC_POS; 1067 rx_status->nss = 1068 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1069 RATE_VHT_MCS_NSS_POS) + 1; 1070 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1071 rx_status->encoding = RX_ENC_VHT; 1072 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1073 if (rate_n_flags & RATE_MCS_BF_MSK) 1074 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1075 } else { 1076 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1077 rx_status->band); 1078 1079 if (WARN(rate < 0 || rate > 0xFF, 1080 "Invalid rate flags 0x%x, band %d,\n", 1081 rate_n_flags, rx_status->band)) { 1082 kfree_skb(skb); 1083 goto out; 1084 } 1085 rx_status->rate_idx = rate; 1086 1087 } 1088 1089 /* management stuff on default queue */ 1090 if (!queue) { 1091 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 1092 ieee80211_is_probe_resp(hdr->frame_control)) && 1093 mvm->sched_scan_pass_all == 1094 SCHED_SCAN_PASS_ALL_ENABLED)) 1095 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 1096 1097 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 1098 ieee80211_is_probe_resp(hdr->frame_control))) 1099 rx_status->boottime_ns = ktime_get_boot_ns(); 1100 } 1101 1102 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); 1103 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 1104 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); 1105 out: 1106 rcu_read_unlock(); 1107 } 1108 1109 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 1110 struct iwl_rx_cmd_buffer *rxb, int queue) 1111 { 1112 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1113 struct iwl_frame_release *release = (void *)pkt->data; 1114 struct ieee80211_sta *sta; 1115 struct iwl_mvm_reorder_buffer *reorder_buf; 1116 struct iwl_mvm_baid_data *ba_data; 1117 1118 int baid = release->baid; 1119 1120 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 1121 release->baid, le16_to_cpu(release->nssn)); 1122 1123 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1124 return; 1125 1126 rcu_read_lock(); 1127 1128 ba_data = rcu_dereference(mvm->baid_map[baid]); 1129 if (WARN_ON_ONCE(!ba_data)) 1130 goto out; 1131 1132 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 1133 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1134 goto out; 1135 1136 reorder_buf = &ba_data->reorder_buf[queue]; 1137 1138 spin_lock_bh(&reorder_buf->lock); 1139 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf, 1140 le16_to_cpu(release->nssn)); 1141 spin_unlock_bh(&reorder_buf->lock); 1142 1143 out: 1144 rcu_read_unlock(); 1145 } 1146