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 * Copyright(c) 2018 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <ilw@linux.intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 *****************************************************************************/ 63 #include <linux/etherdevice.h> 64 #include <linux/skbuff.h> 65 #include "iwl-trans.h" 66 #include "mvm.h" 67 #include "fw-api.h" 68 69 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, 70 int queue, struct ieee80211_sta *sta) 71 { 72 struct iwl_mvm_sta *mvmsta; 73 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 74 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); 75 struct iwl_mvm_key_pn *ptk_pn; 76 int res; 77 u8 tid, keyidx; 78 u8 pn[IEEE80211_CCMP_PN_LEN]; 79 u8 *extiv; 80 81 /* do PN checking */ 82 83 /* multicast and non-data only arrives on default queue */ 84 if (!ieee80211_is_data(hdr->frame_control) || 85 is_multicast_ether_addr(hdr->addr1)) 86 return 0; 87 88 /* do not check PN for open AP */ 89 if (!(stats->flag & RX_FLAG_DECRYPTED)) 90 return 0; 91 92 /* 93 * avoid checking for default queue - we don't want to replicate 94 * all the logic that's necessary for checking the PN on fragmented 95 * frames, leave that to mac80211 96 */ 97 if (queue == 0) 98 return 0; 99 100 /* if we are here - this for sure is either CCMP or GCMP */ 101 if (IS_ERR_OR_NULL(sta)) { 102 IWL_ERR(mvm, 103 "expected hw-decrypted unicast frame for station\n"); 104 return -1; 105 } 106 107 mvmsta = iwl_mvm_sta_from_mac80211(sta); 108 109 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 110 keyidx = extiv[3] >> 6; 111 112 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); 113 if (!ptk_pn) 114 return -1; 115 116 if (ieee80211_is_data_qos(hdr->frame_control)) 117 tid = ieee80211_get_tid(hdr); 118 else 119 tid = 0; 120 121 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ 122 if (tid >= IWL_MAX_TID_COUNT) 123 return -1; 124 125 /* load pn */ 126 pn[0] = extiv[7]; 127 pn[1] = extiv[6]; 128 pn[2] = extiv[5]; 129 pn[3] = extiv[4]; 130 pn[4] = extiv[1]; 131 pn[5] = extiv[0]; 132 133 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN); 134 if (res < 0) 135 return -1; 136 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN)) 137 return -1; 138 139 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); 140 stats->flag |= RX_FLAG_PN_VALIDATED; 141 142 return 0; 143 } 144 145 /* iwl_mvm_create_skb Adds the rxb to a new skb */ 146 static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr, 147 u16 len, u8 crypt_len, 148 struct iwl_rx_cmd_buffer *rxb) 149 { 150 struct iwl_rx_packet *pkt = rxb_addr(rxb); 151 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 152 unsigned int headlen, fraglen, pad_len = 0; 153 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 154 155 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 156 len -= 2; 157 pad_len = 2; 158 } 159 160 /* If frame is small enough to fit in skb->head, pull it completely. 161 * If not, only pull ieee80211_hdr (including crypto if present, and 162 * an additional 8 bytes for SNAP/ethertype, see below) so that 163 * splice() or TCP coalesce are more efficient. 164 * 165 * Since, in addition, ieee80211_data_to_8023() always pull in at 166 * least 8 bytes (possibly more for mesh) we can do the same here 167 * to save the cost of doing it later. That still doesn't pull in 168 * the actual IP header since the typical case has a SNAP header. 169 * If the latter changes (there are efforts in the standards group 170 * to do so) we should revisit this and ieee80211_data_to_8023(). 171 */ 172 headlen = (len <= skb_tailroom(skb)) ? len : 173 hdrlen + crypt_len + 8; 174 175 /* The firmware may align the packet to DWORD. 176 * The padding is inserted after the IV. 177 * After copying the header + IV skip the padding if 178 * present before copying packet data. 179 */ 180 hdrlen += crypt_len; 181 skb_put_data(skb, hdr, hdrlen); 182 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen); 183 184 fraglen = len - headlen; 185 186 if (fraglen) { 187 int offset = (void *)hdr + headlen + pad_len - 188 rxb_addr(rxb) + rxb_offset(rxb); 189 190 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 191 fraglen, rxb->truesize); 192 } 193 } 194 195 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ 196 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 197 struct napi_struct *napi, 198 struct sk_buff *skb, int queue, 199 struct ieee80211_sta *sta) 200 { 201 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 202 203 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) { 204 kfree_skb(skb); 205 } else { 206 unsigned int radiotap_len = 0; 207 208 if (rx_status->flag & RX_FLAG_RADIOTAP_HE) 209 radiotap_len += sizeof(struct ieee80211_radiotap_he); 210 if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU) 211 radiotap_len += sizeof(struct ieee80211_radiotap_he_mu); 212 __skb_push(skb, radiotap_len); 213 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 214 } 215 } 216 217 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 218 struct ieee80211_rx_status *rx_status, 219 u32 rate_n_flags, int energy_a, 220 int energy_b) 221 { 222 int max_energy; 223 u32 rate_flags = rate_n_flags; 224 225 energy_a = energy_a ? -energy_a : S8_MIN; 226 energy_b = energy_b ? -energy_b : S8_MIN; 227 max_energy = max(energy_a, energy_b); 228 229 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 230 energy_a, energy_b, max_energy); 231 232 rx_status->signal = max_energy; 233 rx_status->chains = 234 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 235 rx_status->chain_signal[0] = energy_a; 236 rx_status->chain_signal[1] = energy_b; 237 rx_status->chain_signal[2] = S8_MIN; 238 } 239 240 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, 241 struct ieee80211_rx_status *stats, u16 phy_info, 242 struct iwl_rx_mpdu_desc *desc, 243 u32 pkt_flags, int queue, u8 *crypt_len) 244 { 245 u16 status = le16_to_cpu(desc->status); 246 247 /* 248 * Drop UNKNOWN frames in aggregation, unless in monitor mode 249 * (where we don't have the keys). 250 * We limit this to aggregation because in TKIP this is a valid 251 * scenario, since we may not have the (correct) TTAK (phase 1 252 * key) in the firmware. 253 */ 254 if (phy_info & IWL_RX_MPDU_PHY_AMPDU && 255 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 256 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on) 257 return -1; 258 259 if (!ieee80211_has_protected(hdr->frame_control) || 260 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 261 IWL_RX_MPDU_STATUS_SEC_NONE) 262 return 0; 263 264 /* TODO: handle packets encrypted with unknown alg */ 265 266 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 267 case IWL_RX_MPDU_STATUS_SEC_CCM: 268 case IWL_RX_MPDU_STATUS_SEC_GCM: 269 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 270 /* alg is CCM: check MIC only */ 271 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 272 return -1; 273 274 stats->flag |= RX_FLAG_DECRYPTED; 275 if (pkt_flags & FH_RSCSR_RADA_EN) 276 stats->flag |= RX_FLAG_MIC_STRIPPED; 277 *crypt_len = IEEE80211_CCMP_HDR_LEN; 278 return 0; 279 case IWL_RX_MPDU_STATUS_SEC_TKIP: 280 /* Don't drop the frame and decrypt it in SW */ 281 if (!fw_has_api(&mvm->fw->ucode_capa, 282 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 283 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 284 return 0; 285 286 *crypt_len = IEEE80211_TKIP_IV_LEN; 287 /* fall through if TTAK OK */ 288 case IWL_RX_MPDU_STATUS_SEC_WEP: 289 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 290 return -1; 291 292 stats->flag |= RX_FLAG_DECRYPTED; 293 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 294 IWL_RX_MPDU_STATUS_SEC_WEP) 295 *crypt_len = IEEE80211_WEP_IV_LEN; 296 297 if (pkt_flags & FH_RSCSR_RADA_EN) 298 stats->flag |= RX_FLAG_ICV_STRIPPED; 299 300 return 0; 301 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 302 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 303 return -1; 304 stats->flag |= RX_FLAG_DECRYPTED; 305 return 0; 306 default: 307 /* Expected in monitor (not having the keys) */ 308 if (!mvm->monitor_on) 309 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 310 } 311 312 return 0; 313 } 314 315 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 316 struct sk_buff *skb, 317 struct iwl_rx_mpdu_desc *desc) 318 { 319 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 320 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 321 u16 flags = le16_to_cpu(desc->l3l4_flags); 322 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 323 IWL_RX_L3_PROTO_POS); 324 325 if (mvmvif->features & NETIF_F_RXCSUM && 326 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 327 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 328 l3_prot == IWL_RX_L3_TYPE_IPV6 || 329 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 330 skb->ip_summed = CHECKSUM_UNNECESSARY; 331 } 332 333 /* 334 * returns true if a packet is a duplicate and should be dropped. 335 * Updates AMSDU PN tracking info 336 */ 337 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 338 struct ieee80211_rx_status *rx_status, 339 struct ieee80211_hdr *hdr, 340 struct iwl_rx_mpdu_desc *desc) 341 { 342 struct iwl_mvm_sta *mvm_sta; 343 struct iwl_mvm_rxq_dup_data *dup_data; 344 u8 tid, sub_frame_idx; 345 346 if (WARN_ON(IS_ERR_OR_NULL(sta))) 347 return false; 348 349 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 350 dup_data = &mvm_sta->dup_data[queue]; 351 352 /* 353 * Drop duplicate 802.11 retransmissions 354 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 355 */ 356 if (ieee80211_is_ctl(hdr->frame_control) || 357 ieee80211_is_qos_nullfunc(hdr->frame_control) || 358 is_multicast_ether_addr(hdr->addr1)) { 359 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 360 return false; 361 } 362 363 if (ieee80211_is_data_qos(hdr->frame_control)) 364 /* frame has qos control */ 365 tid = ieee80211_get_tid(hdr); 366 else 367 tid = IWL_MAX_TID_COUNT; 368 369 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 370 sub_frame_idx = desc->amsdu_info & 371 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 372 373 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 374 dup_data->last_seq[tid] == hdr->seq_ctrl && 375 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 376 return true; 377 378 /* Allow same PN as the first subframe for following sub frames */ 379 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 380 sub_frame_idx > dup_data->last_sub_frame[tid] && 381 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 382 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 383 384 dup_data->last_seq[tid] = hdr->seq_ctrl; 385 dup_data->last_sub_frame[tid] = sub_frame_idx; 386 387 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 388 389 return false; 390 } 391 392 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, 393 const u8 *data, u32 count) 394 { 395 struct iwl_rxq_sync_cmd *cmd; 396 u32 data_size = sizeof(*cmd) + count; 397 int ret; 398 399 /* should be DWORD aligned */ 400 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) 401 return -EINVAL; 402 403 cmd = kzalloc(data_size, GFP_KERNEL); 404 if (!cmd) 405 return -ENOMEM; 406 407 cmd->rxq_mask = cpu_to_le32(rxq_mask); 408 cmd->count = cpu_to_le32(count); 409 cmd->flags = 0; 410 memcpy(cmd->payload, data, count); 411 412 ret = iwl_mvm_send_cmd_pdu(mvm, 413 WIDE_ID(DATA_PATH_GROUP, 414 TRIGGER_RX_QUEUES_NOTIF_CMD), 415 0, data_size, cmd); 416 417 kfree(cmd); 418 return ret; 419 } 420 421 /* 422 * Returns true if sn2 - buffer_size < sn1 < sn2. 423 * To be used only in order to compare reorder buffer head with NSSN. 424 * We fully trust NSSN unless it is behind us due to reorder timeout. 425 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 426 */ 427 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 428 { 429 return ieee80211_sn_less(sn1, sn2) && 430 !ieee80211_sn_less(sn1, sn2 - buffer_size); 431 } 432 433 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 434 435 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 436 struct ieee80211_sta *sta, 437 struct napi_struct *napi, 438 struct iwl_mvm_baid_data *baid_data, 439 struct iwl_mvm_reorder_buffer *reorder_buf, 440 u16 nssn) 441 { 442 struct iwl_mvm_reorder_buf_entry *entries = 443 &baid_data->entries[reorder_buf->queue * 444 baid_data->entries_per_queue]; 445 u16 ssn = reorder_buf->head_sn; 446 447 lockdep_assert_held(&reorder_buf->lock); 448 449 /* ignore nssn smaller than head sn - this can happen due to timeout */ 450 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 451 goto set_timer; 452 453 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 454 int index = ssn % reorder_buf->buf_size; 455 struct sk_buff_head *skb_list = &entries[index].e.frames; 456 struct sk_buff *skb; 457 458 ssn = ieee80211_sn_inc(ssn); 459 460 /* 461 * Empty the list. Will have more than one frame for A-MSDU. 462 * Empty list is valid as well since nssn indicates frames were 463 * received. 464 */ 465 while ((skb = __skb_dequeue(skb_list))) { 466 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 467 reorder_buf->queue, 468 sta); 469 reorder_buf->num_stored--; 470 } 471 } 472 reorder_buf->head_sn = nssn; 473 474 set_timer: 475 if (reorder_buf->num_stored && !reorder_buf->removed) { 476 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 477 478 while (skb_queue_empty(&entries[index].e.frames)) 479 index = (index + 1) % reorder_buf->buf_size; 480 /* modify timer to match next frame's expiration time */ 481 mod_timer(&reorder_buf->reorder_timer, 482 entries[index].e.reorder_time + 1 + 483 RX_REORDER_BUF_TIMEOUT_MQ); 484 } else { 485 del_timer(&reorder_buf->reorder_timer); 486 } 487 } 488 489 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 490 { 491 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 492 struct iwl_mvm_baid_data *baid_data = 493 iwl_mvm_baid_data_from_reorder_buf(buf); 494 struct iwl_mvm_reorder_buf_entry *entries = 495 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 496 int i; 497 u16 sn = 0, index = 0; 498 bool expired = false; 499 bool cont = false; 500 501 spin_lock(&buf->lock); 502 503 if (!buf->num_stored || buf->removed) { 504 spin_unlock(&buf->lock); 505 return; 506 } 507 508 for (i = 0; i < buf->buf_size ; i++) { 509 index = (buf->head_sn + i) % buf->buf_size; 510 511 if (skb_queue_empty(&entries[index].e.frames)) { 512 /* 513 * If there is a hole and the next frame didn't expire 514 * we want to break and not advance SN 515 */ 516 cont = false; 517 continue; 518 } 519 if (!cont && 520 !time_after(jiffies, entries[index].e.reorder_time + 521 RX_REORDER_BUF_TIMEOUT_MQ)) 522 break; 523 524 expired = true; 525 /* continue until next hole after this expired frames */ 526 cont = true; 527 sn = ieee80211_sn_add(buf->head_sn, i + 1); 528 } 529 530 if (expired) { 531 struct ieee80211_sta *sta; 532 struct iwl_mvm_sta *mvmsta; 533 u8 sta_id = baid_data->sta_id; 534 535 rcu_read_lock(); 536 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 537 mvmsta = iwl_mvm_sta_from_mac80211(sta); 538 539 /* SN is set to the last expired frame + 1 */ 540 IWL_DEBUG_HT(buf->mvm, 541 "Releasing expired frames for sta %u, sn %d\n", 542 sta_id, sn); 543 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 544 sta, baid_data->tid); 545 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn); 546 rcu_read_unlock(); 547 } else { 548 /* 549 * If no frame expired and there are stored frames, index is now 550 * pointing to the first unexpired frame - modify timer 551 * accordingly to this frame. 552 */ 553 mod_timer(&buf->reorder_timer, 554 entries[index].e.reorder_time + 555 1 + RX_REORDER_BUF_TIMEOUT_MQ); 556 } 557 spin_unlock(&buf->lock); 558 } 559 560 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 561 struct iwl_mvm_delba_data *data) 562 { 563 struct iwl_mvm_baid_data *ba_data; 564 struct ieee80211_sta *sta; 565 struct iwl_mvm_reorder_buffer *reorder_buf; 566 u8 baid = data->baid; 567 568 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 569 return; 570 571 rcu_read_lock(); 572 573 ba_data = rcu_dereference(mvm->baid_map[baid]); 574 if (WARN_ON_ONCE(!ba_data)) 575 goto out; 576 577 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 578 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 579 goto out; 580 581 reorder_buf = &ba_data->reorder_buf[queue]; 582 583 /* release all frames that are in the reorder buffer to the stack */ 584 spin_lock_bh(&reorder_buf->lock); 585 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 586 ieee80211_sn_add(reorder_buf->head_sn, 587 reorder_buf->buf_size)); 588 spin_unlock_bh(&reorder_buf->lock); 589 del_timer_sync(&reorder_buf->reorder_timer); 590 591 out: 592 rcu_read_unlock(); 593 } 594 595 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 596 int queue) 597 { 598 struct iwl_rx_packet *pkt = rxb_addr(rxb); 599 struct iwl_rxq_sync_notification *notif; 600 struct iwl_mvm_internal_rxq_notif *internal_notif; 601 602 notif = (void *)pkt->data; 603 internal_notif = (void *)notif->payload; 604 605 if (internal_notif->sync && 606 mvm->queue_sync_cookie != internal_notif->cookie) { 607 WARN_ONCE(1, "Received expired RX queue sync message\n"); 608 return; 609 } 610 611 switch (internal_notif->type) { 612 case IWL_MVM_RXQ_EMPTY: 613 break; 614 case IWL_MVM_RXQ_NOTIF_DEL_BA: 615 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 616 break; 617 default: 618 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 619 } 620 621 if (internal_notif->sync && 622 !atomic_dec_return(&mvm->queue_sync_counter)) 623 wake_up(&mvm->rx_sync_waitq); 624 } 625 626 /* 627 * Returns true if the MPDU was buffered\dropped, false if it should be passed 628 * to upper layer. 629 */ 630 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 631 struct napi_struct *napi, 632 int queue, 633 struct ieee80211_sta *sta, 634 struct sk_buff *skb, 635 struct iwl_rx_mpdu_desc *desc) 636 { 637 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 638 struct iwl_mvm_sta *mvm_sta; 639 struct iwl_mvm_baid_data *baid_data; 640 struct iwl_mvm_reorder_buffer *buffer; 641 struct sk_buff *tail; 642 u32 reorder = le32_to_cpu(desc->reorder_data); 643 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 644 bool last_subframe = 645 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 646 u8 tid = ieee80211_get_tid(hdr); 647 u8 sub_frame_idx = desc->amsdu_info & 648 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 649 struct iwl_mvm_reorder_buf_entry *entries; 650 int index; 651 u16 nssn, sn; 652 u8 baid; 653 654 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 655 IWL_RX_MPDU_REORDER_BAID_SHIFT; 656 657 /* 658 * This also covers the case of receiving a Block Ack Request 659 * outside a BA session; we'll pass it to mac80211 and that 660 * then sends a delBA action frame. 661 */ 662 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 663 return false; 664 665 /* no sta yet */ 666 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 667 "Got valid BAID without a valid station assigned\n")) 668 return false; 669 670 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 671 672 /* not a data packet or a bar */ 673 if (!ieee80211_is_back_req(hdr->frame_control) && 674 (!ieee80211_is_data_qos(hdr->frame_control) || 675 is_multicast_ether_addr(hdr->addr1))) 676 return false; 677 678 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 679 return false; 680 681 baid_data = rcu_dereference(mvm->baid_map[baid]); 682 if (!baid_data) { 683 IWL_DEBUG_RX(mvm, 684 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 685 baid, reorder); 686 return false; 687 } 688 689 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 690 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 691 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 692 tid)) 693 return false; 694 695 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 696 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 697 IWL_RX_MPDU_REORDER_SN_SHIFT; 698 699 buffer = &baid_data->reorder_buf[queue]; 700 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 701 702 spin_lock_bh(&buffer->lock); 703 704 if (!buffer->valid) { 705 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 706 spin_unlock_bh(&buffer->lock); 707 return false; 708 } 709 buffer->valid = true; 710 } 711 712 if (ieee80211_is_back_req(hdr->frame_control)) { 713 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 714 goto drop; 715 } 716 717 /* 718 * If there was a significant jump in the nssn - adjust. 719 * If the SN is smaller than the NSSN it might need to first go into 720 * the reorder buffer, in which case we just release up to it and the 721 * rest of the function will take care of storing it and releasing up to 722 * the nssn 723 */ 724 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 725 buffer->buf_size) || 726 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 727 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 728 729 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 730 min_sn); 731 } 732 733 /* drop any oudated packets */ 734 if (ieee80211_sn_less(sn, buffer->head_sn)) 735 goto drop; 736 737 /* release immediately if allowed by nssn and no stored frames */ 738 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 739 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 740 buffer->buf_size) && 741 (!amsdu || last_subframe)) 742 buffer->head_sn = nssn; 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 /* 749 * release immediately if there are no stored frames, and the sn is 750 * equal to the head. 751 * This can happen due to reorder timer, where NSSN is behind head_sn. 752 * When we released everything, and we got the next frame in the 753 * sequence, according to the NSSN we can't release immediately, 754 * while technically there is no hole and we can move forward. 755 */ 756 if (!buffer->num_stored && sn == buffer->head_sn) { 757 if (!amsdu || last_subframe) 758 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 759 /* No need to update AMSDU last SN - we are moving the head */ 760 spin_unlock_bh(&buffer->lock); 761 return false; 762 } 763 764 index = sn % buffer->buf_size; 765 766 /* 767 * Check if we already stored this frame 768 * As AMSDU is either received or not as whole, logic is simple: 769 * If we have frames in that position in the buffer and the last frame 770 * originated from AMSDU had a different SN then it is a retransmission. 771 * If it is the same SN then if the subframe index is incrementing it 772 * is the same AMSDU - otherwise it is a retransmission. 773 */ 774 tail = skb_peek_tail(&entries[index].e.frames); 775 if (tail && !amsdu) 776 goto drop; 777 else if (tail && (sn != buffer->last_amsdu || 778 buffer->last_sub_index >= sub_frame_idx)) 779 goto drop; 780 781 /* put in reorder buffer */ 782 __skb_queue_tail(&entries[index].e.frames, skb); 783 buffer->num_stored++; 784 entries[index].e.reorder_time = jiffies; 785 786 if (amsdu) { 787 buffer->last_amsdu = sn; 788 buffer->last_sub_index = sub_frame_idx; 789 } 790 791 /* 792 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 793 * The reason is that NSSN advances on the first sub-frame, and may 794 * cause the reorder buffer to advance before all the sub-frames arrive. 795 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 796 * SN 1. NSSN for first sub frame will be 3 with the result of driver 797 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 798 * already ahead and it will be dropped. 799 * If the last sub-frame is not on this queue - we will get frame 800 * release notification with up to date NSSN. 801 */ 802 if (!amsdu || last_subframe) 803 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 804 805 spin_unlock_bh(&buffer->lock); 806 return true; 807 808 drop: 809 kfree_skb(skb); 810 spin_unlock_bh(&buffer->lock); 811 return true; 812 } 813 814 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 815 u32 reorder_data, u8 baid) 816 { 817 unsigned long now = jiffies; 818 unsigned long timeout; 819 struct iwl_mvm_baid_data *data; 820 821 rcu_read_lock(); 822 823 data = rcu_dereference(mvm->baid_map[baid]); 824 if (!data) { 825 IWL_DEBUG_RX(mvm, 826 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 827 baid, reorder_data); 828 goto out; 829 } 830 831 if (!data->timeout) 832 goto out; 833 834 timeout = data->timeout; 835 /* 836 * Do not update last rx all the time to avoid cache bouncing 837 * between the rx queues. 838 * Update it every timeout. Worst case is the session will 839 * expire after ~ 2 * timeout, which doesn't matter that much. 840 */ 841 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 842 /* Update is atomic */ 843 data->last_rx = now; 844 845 out: 846 rcu_read_unlock(); 847 } 848 849 static void iwl_mvm_flip_address(u8 *addr) 850 { 851 int i; 852 u8 mac_addr[ETH_ALEN]; 853 854 for (i = 0; i < ETH_ALEN; i++) 855 mac_addr[i] = addr[ETH_ALEN - i - 1]; 856 ether_addr_copy(addr, mac_addr); 857 } 858 859 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 860 struct iwl_rx_cmd_buffer *rxb, int queue) 861 { 862 struct ieee80211_rx_status *rx_status; 863 struct iwl_rx_packet *pkt = rxb_addr(rxb); 864 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 865 struct ieee80211_hdr *hdr; 866 u32 len = le16_to_cpu(desc->mpdu_len); 867 u32 rate_n_flags, gp2_on_air_rise; 868 u16 phy_info = le16_to_cpu(desc->phy_info); 869 struct ieee80211_sta *sta = NULL; 870 struct sk_buff *skb; 871 u8 crypt_len = 0, channel, energy_a, energy_b; 872 struct ieee80211_radiotap_he *he = NULL; 873 struct ieee80211_radiotap_he_mu *he_mu = NULL; 874 u32 he_type = 0xffffffff; 875 /* this is invalid e.g. because puncture type doesn't allow 0b11 */ 876 #define HE_PHY_DATA_INVAL ((u64)-1) 877 u64 he_phy_data = HE_PHY_DATA_INVAL; 878 size_t desc_size; 879 880 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 881 return; 882 883 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) { 884 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags); 885 channel = desc->v3.channel; 886 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise); 887 energy_a = desc->v3.energy_a; 888 energy_b = desc->v3.energy_b; 889 desc_size = sizeof(*desc); 890 } else { 891 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags); 892 channel = desc->v1.channel; 893 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise); 894 energy_a = desc->v1.energy_a; 895 energy_b = desc->v1.energy_b; 896 desc_size = IWL_RX_DESC_SIZE_V1; 897 } 898 899 hdr = (void *)(pkt->data + desc_size); 900 /* Dont use dev_alloc_skb(), we'll have enough headroom once 901 * ieee80211_hdr pulled. 902 */ 903 skb = alloc_skb(128, GFP_ATOMIC); 904 if (!skb) { 905 IWL_ERR(mvm, "alloc_skb failed\n"); 906 return; 907 } 908 909 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 910 /* 911 * If the device inserted padding it means that (it thought) 912 * the 802.11 header wasn't a multiple of 4 bytes long. In 913 * this case, reserve two bytes at the start of the SKB to 914 * align the payload properly in case we end up copying it. 915 */ 916 skb_reserve(skb, 2); 917 } 918 919 rx_status = IEEE80211_SKB_RXCB(skb); 920 921 if (rate_n_flags & RATE_MCS_HE_MSK) { 922 static const struct ieee80211_radiotap_he known = { 923 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 924 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 925 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | 926 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), 927 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | 928 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), 929 }; 930 static const struct ieee80211_radiotap_he_mu mu_known = { 931 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | 932 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | 933 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | 934 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), 935 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN), 936 }; 937 unsigned int radiotap_len = 0; 938 939 he = skb_put_data(skb, &known, sizeof(known)); 940 radiotap_len += sizeof(known); 941 rx_status->flag |= RX_FLAG_RADIOTAP_HE; 942 943 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 944 945 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) { 946 if (mvm->trans->cfg->device_family >= 947 IWL_DEVICE_FAMILY_22560) 948 he_phy_data = le64_to_cpu(desc->v3.he_phy_data); 949 else 950 he_phy_data = le64_to_cpu(desc->v1.he_phy_data); 951 952 if (he_type == RATE_MCS_HE_TYPE_MU) { 953 he_mu = skb_put_data(skb, &mu_known, 954 sizeof(mu_known)); 955 radiotap_len += sizeof(mu_known); 956 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; 957 } 958 } 959 960 /* temporarily hide the radiotap data */ 961 __skb_pull(skb, radiotap_len); 962 } 963 964 rx_status = IEEE80211_SKB_RXCB(skb); 965 966 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc, 967 le32_to_cpu(pkt->len_n_flags), queue, 968 &crypt_len)) { 969 kfree_skb(skb); 970 return; 971 } 972 973 /* 974 * Keep packets with CRC errors (and with overrun) for monitor mode 975 * (otherwise the firmware discards them) but mark them as bad. 976 */ 977 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || 978 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 979 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 980 le16_to_cpu(desc->status)); 981 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 982 } 983 /* set the preamble flag if appropriate */ 984 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 985 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 986 987 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 988 u64 tsf_on_air_rise; 989 990 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) 991 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise); 992 else 993 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise); 994 995 rx_status->mactime = tsf_on_air_rise; 996 /* TSF as indicated by the firmware is at INA time */ 997 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 998 } else if (he_type == RATE_MCS_HE_TYPE_SU) { 999 u64 he_phy_data; 1000 1001 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) 1002 he_phy_data = le64_to_cpu(desc->v3.he_phy_data); 1003 else 1004 he_phy_data = le64_to_cpu(desc->v1.he_phy_data); 1005 1006 he->data1 |= 1007 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); 1008 if (FIELD_GET(IWL_RX_HE_PHY_UPLINK, 1009 he_phy_data)) 1010 he->data3 |= 1011 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA3_UL_DL); 1012 1013 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1014 rx_status->ampdu_reference = mvm->ampdu_ref; 1015 mvm->ampdu_ref++; 1016 1017 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1018 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1019 if (FIELD_GET(IWL_RX_HE_PHY_DELIM_EOF, 1020 he_phy_data)) 1021 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1022 } 1023 } else if (he_mu && he_phy_data != HE_PHY_DATA_INVAL) { 1024 he_mu->flags1 |= 1025 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIBG_SYM_OR_USER_NUM_MASK, 1026 he_phy_data), 1027 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); 1028 he_mu->flags1 |= 1029 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_DCM, 1030 he_phy_data), 1031 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); 1032 he_mu->flags1 |= 1033 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_MCS_MASK, 1034 he_phy_data), 1035 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); 1036 he_mu->flags2 |= 1037 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_COMPRESSION, 1038 he_phy_data), 1039 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); 1040 he_mu->flags2 |= 1041 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_PREAMBLE_PUNC_TYPE_MASK, 1042 he_phy_data), 1043 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); 1044 } 1045 rx_status->device_timestamp = gp2_on_air_rise; 1046 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1047 NL80211_BAND_2GHZ; 1048 rx_status->freq = ieee80211_channel_to_frequency(channel, 1049 rx_status->band); 1050 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1051 energy_b); 1052 1053 /* update aggregation data for monitor sake on default queue */ 1054 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1055 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1056 u64 he_phy_data; 1057 1058 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) 1059 he_phy_data = le64_to_cpu(desc->v3.he_phy_data); 1060 else 1061 he_phy_data = le64_to_cpu(desc->v1.he_phy_data); 1062 1063 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1064 rx_status->ampdu_reference = mvm->ampdu_ref; 1065 /* toggle is switched whenever new aggregation starts */ 1066 if (toggle_bit != mvm->ampdu_toggle) { 1067 mvm->ampdu_ref++; 1068 mvm->ampdu_toggle = toggle_bit; 1069 1070 if (he_phy_data != HE_PHY_DATA_INVAL && 1071 he_type == RATE_MCS_HE_TYPE_MU) { 1072 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1073 if (FIELD_GET(IWL_RX_HE_PHY_DELIM_EOF, 1074 he_phy_data)) 1075 rx_status->flag |= 1076 RX_FLAG_AMPDU_EOF_BIT; 1077 } 1078 } 1079 } 1080 1081 rcu_read_lock(); 1082 1083 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 1084 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; 1085 1086 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 1087 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 1088 if (IS_ERR(sta)) 1089 sta = NULL; 1090 } 1091 } else if (!is_multicast_ether_addr(hdr->addr2)) { 1092 /* 1093 * This is fine since we prevent two stations with the same 1094 * address from being added. 1095 */ 1096 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 1097 } 1098 1099 if (sta) { 1100 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1101 struct ieee80211_vif *tx_blocked_vif = 1102 rcu_dereference(mvm->csa_tx_blocked_vif); 1103 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 1104 IWL_RX_MPDU_REORDER_BAID_MASK) >> 1105 IWL_RX_MPDU_REORDER_BAID_SHIFT); 1106 1107 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 1108 !is_multicast_ether_addr(hdr->addr1) && 1109 ieee80211_is_data(hdr->frame_control) && 1110 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1111 schedule_delayed_work(&mvm->tcm.work, 0); 1112 1113 /* 1114 * We have tx blocked stations (with CS bit). If we heard 1115 * frames from a blocked station on a new channel we can 1116 * TX to it again. 1117 */ 1118 if (unlikely(tx_blocked_vif) && 1119 tx_blocked_vif == mvmsta->vif) { 1120 struct iwl_mvm_vif *mvmvif = 1121 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1122 1123 if (mvmvif->csa_target_freq == rx_status->freq) 1124 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 1125 false); 1126 } 1127 1128 rs_update_last_rssi(mvm, mvmsta, rx_status); 1129 1130 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 1131 ieee80211_is_beacon(hdr->frame_control)) { 1132 struct iwl_fw_dbg_trigger_tlv *trig; 1133 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 1134 bool trig_check; 1135 s32 rssi; 1136 1137 trig = iwl_fw_dbg_get_trigger(mvm->fw, 1138 FW_DBG_TRIGGER_RSSI); 1139 rssi_trig = (void *)trig->data; 1140 rssi = le32_to_cpu(rssi_trig->rssi); 1141 1142 trig_check = 1143 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 1144 ieee80211_vif_to_wdev(mvmsta->vif), 1145 trig); 1146 if (trig_check && rx_status->signal < rssi) 1147 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1148 NULL); 1149 } 1150 1151 if (ieee80211_is_data(hdr->frame_control)) 1152 iwl_mvm_rx_csum(sta, skb, desc); 1153 1154 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1155 kfree_skb(skb); 1156 goto out; 1157 } 1158 1159 /* 1160 * Our hardware de-aggregates AMSDUs but copies the mac header 1161 * as it to the de-aggregated MPDUs. We need to turn off the 1162 * AMSDU bit in the QoS control ourselves. 1163 * In addition, HW reverses addr3 and addr4 - reverse it back. 1164 */ 1165 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1166 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1167 u8 *qc = ieee80211_get_qos_ctl(hdr); 1168 1169 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1170 1171 if (mvm->trans->cfg->device_family == 1172 IWL_DEVICE_FAMILY_9000) { 1173 iwl_mvm_flip_address(hdr->addr3); 1174 1175 if (ieee80211_has_a4(hdr->frame_control)) 1176 iwl_mvm_flip_address(hdr->addr4); 1177 } 1178 } 1179 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1180 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1181 1182 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1183 } 1184 } 1185 1186 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1187 case RATE_MCS_CHAN_WIDTH_20: 1188 break; 1189 case RATE_MCS_CHAN_WIDTH_40: 1190 rx_status->bw = RATE_INFO_BW_40; 1191 break; 1192 case RATE_MCS_CHAN_WIDTH_80: 1193 rx_status->bw = RATE_INFO_BW_80; 1194 break; 1195 case RATE_MCS_CHAN_WIDTH_160: 1196 rx_status->bw = RATE_INFO_BW_160; 1197 break; 1198 } 1199 1200 if (he_type == RATE_MCS_HE_TYPE_EXT_SU && 1201 rate_n_flags & RATE_MCS_HE_106T_MSK) { 1202 rx_status->bw = RATE_INFO_BW_HE_RU; 1203 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1204 } 1205 1206 if (rate_n_flags & RATE_MCS_HE_MSK && 1207 phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD && 1208 he_type == RATE_MCS_HE_TYPE_MU) { 1209 /* 1210 * Unfortunately, we have to leave the mac80211 data 1211 * incorrect for the case that we receive an HE-MU 1212 * transmission and *don't* have the he_mu pointer, 1213 * i.e. we don't have the phy data (due to the bits 1214 * being used for TSF). This shouldn't happen though 1215 * as management frames where we need the TSF/timers 1216 * are not be transmitted in HE-MU, I think. 1217 */ 1218 u8 ru = FIELD_GET(IWL_RX_HE_PHY_RU_ALLOC_MASK, he_phy_data); 1219 u8 offs = 0; 1220 1221 rx_status->bw = RATE_INFO_BW_HE_RU; 1222 1223 switch (ru) { 1224 case 0 ... 36: 1225 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26; 1226 offs = ru; 1227 break; 1228 case 37 ... 52: 1229 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52; 1230 offs = ru - 37; 1231 break; 1232 case 53 ... 60: 1233 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1234 offs = ru - 53; 1235 break; 1236 case 61 ... 64: 1237 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242; 1238 offs = ru - 61; 1239 break; 1240 case 65 ... 66: 1241 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484; 1242 offs = ru - 65; 1243 break; 1244 case 67: 1245 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996; 1246 break; 1247 case 68: 1248 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; 1249 break; 1250 } 1251 he->data2 |= 1252 le16_encode_bits(offs, 1253 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); 1254 he->data2 |= 1255 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN); 1256 if (he_phy_data & IWL_RX_HE_PHY_RU_ALLOC_SEC80) 1257 he->data2 |= 1258 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); 1259 } else if (he) { 1260 he->data1 |= 1261 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1262 } 1263 1264 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1265 rate_n_flags & RATE_MCS_SGI_MSK) 1266 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1267 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1268 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1269 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1270 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1271 if (rate_n_flags & RATE_MCS_HT_MSK) { 1272 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1273 RATE_MCS_STBC_POS; 1274 rx_status->encoding = RX_ENC_HT; 1275 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1276 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1277 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1278 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1279 RATE_MCS_STBC_POS; 1280 rx_status->nss = 1281 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1282 RATE_VHT_MCS_NSS_POS) + 1; 1283 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1284 rx_status->encoding = RX_ENC_VHT; 1285 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1286 if (rate_n_flags & RATE_MCS_BF_MSK) 1287 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1288 } else if (he) { 1289 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1290 RATE_MCS_STBC_POS; 1291 rx_status->nss = 1292 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1293 RATE_VHT_MCS_NSS_POS) + 1; 1294 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1295 rx_status->encoding = RX_ENC_HE; 1296 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1297 if (rate_n_flags & RATE_MCS_BF_MSK) 1298 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1299 1300 rx_status->he_dcm = 1301 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); 1302 1303 #define CHECK_TYPE(F) \ 1304 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ 1305 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) 1306 1307 CHECK_TYPE(SU); 1308 CHECK_TYPE(EXT_SU); 1309 CHECK_TYPE(MU); 1310 CHECK_TYPE(TRIG); 1311 1312 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); 1313 1314 if (rate_n_flags & RATE_MCS_BF_POS) 1315 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); 1316 1317 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> 1318 RATE_MCS_HE_GI_LTF_POS) { 1319 case 0: 1320 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1321 break; 1322 case 1: 1323 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1324 break; 1325 case 2: 1326 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1327 break; 1328 case 3: 1329 if (rate_n_flags & RATE_MCS_SGI_MSK) 1330 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1331 else 1332 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1333 break; 1334 } 1335 1336 switch (he_type) { 1337 case RATE_MCS_HE_TYPE_SU: { 1338 u16 val; 1339 1340 /* LTF syms correspond to streams */ 1341 he->data2 |= 1342 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1343 switch (rx_status->nss) { 1344 case 1: 1345 val = 0; 1346 break; 1347 case 2: 1348 val = 1; 1349 break; 1350 case 3: 1351 case 4: 1352 val = 2; 1353 break; 1354 case 5: 1355 case 6: 1356 val = 3; 1357 break; 1358 case 7: 1359 case 8: 1360 val = 4; 1361 break; 1362 default: 1363 WARN_ONCE(1, "invalid nss: %d\n", 1364 rx_status->nss); 1365 val = 0; 1366 } 1367 he->data5 |= 1368 le16_encode_bits(val, 1369 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); 1370 } 1371 break; 1372 case RATE_MCS_HE_TYPE_MU: { 1373 u16 val; 1374 u64 he_phy_data; 1375 1376 if (mvm->trans->cfg->device_family >= 1377 IWL_DEVICE_FAMILY_22560) 1378 he_phy_data = le64_to_cpu(desc->v3.he_phy_data); 1379 else 1380 he_phy_data = le64_to_cpu(desc->v1.he_phy_data); 1381 1382 if (he_phy_data == HE_PHY_DATA_INVAL) 1383 break; 1384 1385 val = FIELD_GET(IWL_RX_HE_PHY_HE_LTF_NUM_MASK, 1386 he_phy_data); 1387 1388 he->data2 |= 1389 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1390 he->data5 |= 1391 cpu_to_le16(FIELD_PREP( 1392 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS, 1393 val)); 1394 } 1395 break; 1396 case RATE_MCS_HE_TYPE_EXT_SU: 1397 case RATE_MCS_HE_TYPE_TRIG: 1398 /* not supported yet */ 1399 break; 1400 } 1401 } else { 1402 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1403 rx_status->band); 1404 1405 if (WARN(rate < 0 || rate > 0xFF, 1406 "Invalid rate flags 0x%x, band %d,\n", 1407 rate_n_flags, rx_status->band)) { 1408 kfree_skb(skb); 1409 goto out; 1410 } 1411 rx_status->rate_idx = rate; 1412 1413 } 1414 1415 /* management stuff on default queue */ 1416 if (!queue) { 1417 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 1418 ieee80211_is_probe_resp(hdr->frame_control)) && 1419 mvm->sched_scan_pass_all == 1420 SCHED_SCAN_PASS_ALL_ENABLED)) 1421 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 1422 1423 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 1424 ieee80211_is_probe_resp(hdr->frame_control))) 1425 rx_status->boottime_ns = ktime_get_boot_ns(); 1426 } 1427 1428 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); 1429 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 1430 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); 1431 out: 1432 rcu_read_unlock(); 1433 } 1434 1435 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 1436 struct iwl_rx_cmd_buffer *rxb, int queue) 1437 { 1438 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1439 struct iwl_frame_release *release = (void *)pkt->data; 1440 struct ieee80211_sta *sta; 1441 struct iwl_mvm_reorder_buffer *reorder_buf; 1442 struct iwl_mvm_baid_data *ba_data; 1443 1444 int baid = release->baid; 1445 1446 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 1447 release->baid, le16_to_cpu(release->nssn)); 1448 1449 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1450 return; 1451 1452 rcu_read_lock(); 1453 1454 ba_data = rcu_dereference(mvm->baid_map[baid]); 1455 if (WARN_ON_ONCE(!ba_data)) 1456 goto out; 1457 1458 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 1459 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1460 goto out; 1461 1462 reorder_buf = &ba_data->reorder_buf[queue]; 1463 1464 spin_lock_bh(&reorder_buf->lock); 1465 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf, 1466 le16_to_cpu(release->nssn)); 1467 spin_unlock_bh(&reorder_buf->lock); 1468 1469 out: 1470 rcu_read_unlock(); 1471 } 1472