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 (!(rx_status->flag & RX_FLAG_NO_PSDU) && 204 iwl_mvm_check_pn(mvm, skb, queue, sta)) { 205 kfree_skb(skb); 206 } else { 207 unsigned int radiotap_len = 0; 208 209 if (rx_status->flag & RX_FLAG_RADIOTAP_HE) 210 radiotap_len += sizeof(struct ieee80211_radiotap_he); 211 if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU) 212 radiotap_len += sizeof(struct ieee80211_radiotap_he_mu); 213 __skb_push(skb, radiotap_len); 214 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 215 } 216 } 217 218 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 219 struct ieee80211_rx_status *rx_status, 220 u32 rate_n_flags, int energy_a, 221 int energy_b) 222 { 223 int max_energy; 224 u32 rate_flags = rate_n_flags; 225 226 energy_a = energy_a ? -energy_a : S8_MIN; 227 energy_b = energy_b ? -energy_b : S8_MIN; 228 max_energy = max(energy_a, energy_b); 229 230 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 231 energy_a, energy_b, max_energy); 232 233 rx_status->signal = max_energy; 234 rx_status->chains = 235 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 236 rx_status->chain_signal[0] = energy_a; 237 rx_status->chain_signal[1] = energy_b; 238 rx_status->chain_signal[2] = S8_MIN; 239 } 240 241 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, 242 struct ieee80211_rx_status *stats, u16 phy_info, 243 struct iwl_rx_mpdu_desc *desc, 244 u32 pkt_flags, int queue, u8 *crypt_len) 245 { 246 u16 status = le16_to_cpu(desc->status); 247 248 /* 249 * Drop UNKNOWN frames in aggregation, unless in monitor mode 250 * (where we don't have the keys). 251 * We limit this to aggregation because in TKIP this is a valid 252 * scenario, since we may not have the (correct) TTAK (phase 1 253 * key) in the firmware. 254 */ 255 if (phy_info & IWL_RX_MPDU_PHY_AMPDU && 256 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 257 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on) 258 return -1; 259 260 if (!ieee80211_has_protected(hdr->frame_control) || 261 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 262 IWL_RX_MPDU_STATUS_SEC_NONE) 263 return 0; 264 265 /* TODO: handle packets encrypted with unknown alg */ 266 267 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 268 case IWL_RX_MPDU_STATUS_SEC_CCM: 269 case IWL_RX_MPDU_STATUS_SEC_GCM: 270 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 271 /* alg is CCM: check MIC only */ 272 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 273 return -1; 274 275 stats->flag |= RX_FLAG_DECRYPTED; 276 if (pkt_flags & FH_RSCSR_RADA_EN) 277 stats->flag |= RX_FLAG_MIC_STRIPPED; 278 *crypt_len = IEEE80211_CCMP_HDR_LEN; 279 return 0; 280 case IWL_RX_MPDU_STATUS_SEC_TKIP: 281 /* Don't drop the frame and decrypt it in SW */ 282 if (!fw_has_api(&mvm->fw->ucode_capa, 283 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 284 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 285 return 0; 286 287 if (mvm->trans->cfg->gen2 && 288 !(status & RX_MPDU_RES_STATUS_MIC_OK)) 289 stats->flag |= RX_FLAG_MMIC_ERROR; 290 291 *crypt_len = IEEE80211_TKIP_IV_LEN; 292 /* fall through if TTAK OK */ 293 case IWL_RX_MPDU_STATUS_SEC_WEP: 294 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 295 return -1; 296 297 stats->flag |= RX_FLAG_DECRYPTED; 298 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 299 IWL_RX_MPDU_STATUS_SEC_WEP) 300 *crypt_len = IEEE80211_WEP_IV_LEN; 301 302 if (pkt_flags & FH_RSCSR_RADA_EN) { 303 stats->flag |= RX_FLAG_ICV_STRIPPED; 304 if (mvm->trans->cfg->gen2) 305 stats->flag |= RX_FLAG_MMIC_STRIPPED; 306 } 307 308 return 0; 309 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 310 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 311 return -1; 312 stats->flag |= RX_FLAG_DECRYPTED; 313 return 0; 314 default: 315 /* Expected in monitor (not having the keys) */ 316 if (!mvm->monitor_on) 317 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 318 } 319 320 return 0; 321 } 322 323 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 324 struct sk_buff *skb, 325 struct iwl_rx_mpdu_desc *desc) 326 { 327 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 328 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 329 u16 flags = le16_to_cpu(desc->l3l4_flags); 330 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 331 IWL_RX_L3_PROTO_POS); 332 333 if (mvmvif->features & NETIF_F_RXCSUM && 334 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 335 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 336 l3_prot == IWL_RX_L3_TYPE_IPV6 || 337 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 338 skb->ip_summed = CHECKSUM_UNNECESSARY; 339 } 340 341 /* 342 * returns true if a packet is a duplicate and should be dropped. 343 * Updates AMSDU PN tracking info 344 */ 345 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 346 struct ieee80211_rx_status *rx_status, 347 struct ieee80211_hdr *hdr, 348 struct iwl_rx_mpdu_desc *desc) 349 { 350 struct iwl_mvm_sta *mvm_sta; 351 struct iwl_mvm_rxq_dup_data *dup_data; 352 u8 tid, sub_frame_idx; 353 354 if (WARN_ON(IS_ERR_OR_NULL(sta))) 355 return false; 356 357 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 358 dup_data = &mvm_sta->dup_data[queue]; 359 360 /* 361 * Drop duplicate 802.11 retransmissions 362 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 363 */ 364 if (ieee80211_is_ctl(hdr->frame_control) || 365 ieee80211_is_qos_nullfunc(hdr->frame_control) || 366 is_multicast_ether_addr(hdr->addr1)) { 367 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 368 return false; 369 } 370 371 if (ieee80211_is_data_qos(hdr->frame_control)) 372 /* frame has qos control */ 373 tid = ieee80211_get_tid(hdr); 374 else 375 tid = IWL_MAX_TID_COUNT; 376 377 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 378 sub_frame_idx = desc->amsdu_info & 379 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 380 381 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 382 dup_data->last_seq[tid] == hdr->seq_ctrl && 383 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 384 return true; 385 386 /* Allow same PN as the first subframe for following sub frames */ 387 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 388 sub_frame_idx > dup_data->last_sub_frame[tid] && 389 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 390 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 391 392 dup_data->last_seq[tid] = hdr->seq_ctrl; 393 dup_data->last_sub_frame[tid] = sub_frame_idx; 394 395 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 396 397 return false; 398 } 399 400 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, 401 const u8 *data, u32 count) 402 { 403 struct iwl_rxq_sync_cmd *cmd; 404 u32 data_size = sizeof(*cmd) + count; 405 int ret; 406 407 /* should be DWORD aligned */ 408 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) 409 return -EINVAL; 410 411 cmd = kzalloc(data_size, GFP_KERNEL); 412 if (!cmd) 413 return -ENOMEM; 414 415 cmd->rxq_mask = cpu_to_le32(rxq_mask); 416 cmd->count = cpu_to_le32(count); 417 cmd->flags = 0; 418 memcpy(cmd->payload, data, count); 419 420 ret = iwl_mvm_send_cmd_pdu(mvm, 421 WIDE_ID(DATA_PATH_GROUP, 422 TRIGGER_RX_QUEUES_NOTIF_CMD), 423 0, data_size, cmd); 424 425 kfree(cmd); 426 return ret; 427 } 428 429 /* 430 * Returns true if sn2 - buffer_size < sn1 < sn2. 431 * To be used only in order to compare reorder buffer head with NSSN. 432 * We fully trust NSSN unless it is behind us due to reorder timeout. 433 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 434 */ 435 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 436 { 437 return ieee80211_sn_less(sn1, sn2) && 438 !ieee80211_sn_less(sn1, sn2 - buffer_size); 439 } 440 441 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 442 443 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 444 struct ieee80211_sta *sta, 445 struct napi_struct *napi, 446 struct iwl_mvm_baid_data *baid_data, 447 struct iwl_mvm_reorder_buffer *reorder_buf, 448 u16 nssn) 449 { 450 struct iwl_mvm_reorder_buf_entry *entries = 451 &baid_data->entries[reorder_buf->queue * 452 baid_data->entries_per_queue]; 453 u16 ssn = reorder_buf->head_sn; 454 455 lockdep_assert_held(&reorder_buf->lock); 456 457 /* ignore nssn smaller than head sn - this can happen due to timeout */ 458 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 459 goto set_timer; 460 461 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 462 int index = ssn % reorder_buf->buf_size; 463 struct sk_buff_head *skb_list = &entries[index].e.frames; 464 struct sk_buff *skb; 465 466 ssn = ieee80211_sn_inc(ssn); 467 468 /* 469 * Empty the list. Will have more than one frame for A-MSDU. 470 * Empty list is valid as well since nssn indicates frames were 471 * received. 472 */ 473 while ((skb = __skb_dequeue(skb_list))) { 474 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 475 reorder_buf->queue, 476 sta); 477 reorder_buf->num_stored--; 478 } 479 } 480 reorder_buf->head_sn = nssn; 481 482 set_timer: 483 if (reorder_buf->num_stored && !reorder_buf->removed) { 484 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 485 486 while (skb_queue_empty(&entries[index].e.frames)) 487 index = (index + 1) % reorder_buf->buf_size; 488 /* modify timer to match next frame's expiration time */ 489 mod_timer(&reorder_buf->reorder_timer, 490 entries[index].e.reorder_time + 1 + 491 RX_REORDER_BUF_TIMEOUT_MQ); 492 } else { 493 del_timer(&reorder_buf->reorder_timer); 494 } 495 } 496 497 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 498 { 499 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 500 struct iwl_mvm_baid_data *baid_data = 501 iwl_mvm_baid_data_from_reorder_buf(buf); 502 struct iwl_mvm_reorder_buf_entry *entries = 503 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 504 int i; 505 u16 sn = 0, index = 0; 506 bool expired = false; 507 bool cont = false; 508 509 spin_lock(&buf->lock); 510 511 if (!buf->num_stored || buf->removed) { 512 spin_unlock(&buf->lock); 513 return; 514 } 515 516 for (i = 0; i < buf->buf_size ; i++) { 517 index = (buf->head_sn + i) % buf->buf_size; 518 519 if (skb_queue_empty(&entries[index].e.frames)) { 520 /* 521 * If there is a hole and the next frame didn't expire 522 * we want to break and not advance SN 523 */ 524 cont = false; 525 continue; 526 } 527 if (!cont && 528 !time_after(jiffies, entries[index].e.reorder_time + 529 RX_REORDER_BUF_TIMEOUT_MQ)) 530 break; 531 532 expired = true; 533 /* continue until next hole after this expired frames */ 534 cont = true; 535 sn = ieee80211_sn_add(buf->head_sn, i + 1); 536 } 537 538 if (expired) { 539 struct ieee80211_sta *sta; 540 struct iwl_mvm_sta *mvmsta; 541 u8 sta_id = baid_data->sta_id; 542 543 rcu_read_lock(); 544 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 545 mvmsta = iwl_mvm_sta_from_mac80211(sta); 546 547 /* SN is set to the last expired frame + 1 */ 548 IWL_DEBUG_HT(buf->mvm, 549 "Releasing expired frames for sta %u, sn %d\n", 550 sta_id, sn); 551 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 552 sta, baid_data->tid); 553 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn); 554 rcu_read_unlock(); 555 } else { 556 /* 557 * If no frame expired and there are stored frames, index is now 558 * pointing to the first unexpired frame - modify timer 559 * accordingly to this frame. 560 */ 561 mod_timer(&buf->reorder_timer, 562 entries[index].e.reorder_time + 563 1 + RX_REORDER_BUF_TIMEOUT_MQ); 564 } 565 spin_unlock(&buf->lock); 566 } 567 568 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 569 struct iwl_mvm_delba_data *data) 570 { 571 struct iwl_mvm_baid_data *ba_data; 572 struct ieee80211_sta *sta; 573 struct iwl_mvm_reorder_buffer *reorder_buf; 574 u8 baid = data->baid; 575 576 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 577 return; 578 579 rcu_read_lock(); 580 581 ba_data = rcu_dereference(mvm->baid_map[baid]); 582 if (WARN_ON_ONCE(!ba_data)) 583 goto out; 584 585 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 586 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 587 goto out; 588 589 reorder_buf = &ba_data->reorder_buf[queue]; 590 591 /* release all frames that are in the reorder buffer to the stack */ 592 spin_lock_bh(&reorder_buf->lock); 593 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 594 ieee80211_sn_add(reorder_buf->head_sn, 595 reorder_buf->buf_size)); 596 spin_unlock_bh(&reorder_buf->lock); 597 del_timer_sync(&reorder_buf->reorder_timer); 598 599 out: 600 rcu_read_unlock(); 601 } 602 603 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 604 int queue) 605 { 606 struct iwl_rx_packet *pkt = rxb_addr(rxb); 607 struct iwl_rxq_sync_notification *notif; 608 struct iwl_mvm_internal_rxq_notif *internal_notif; 609 610 notif = (void *)pkt->data; 611 internal_notif = (void *)notif->payload; 612 613 if (internal_notif->sync && 614 mvm->queue_sync_cookie != internal_notif->cookie) { 615 WARN_ONCE(1, "Received expired RX queue sync message\n"); 616 return; 617 } 618 619 switch (internal_notif->type) { 620 case IWL_MVM_RXQ_EMPTY: 621 break; 622 case IWL_MVM_RXQ_NOTIF_DEL_BA: 623 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 624 break; 625 default: 626 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 627 } 628 629 if (internal_notif->sync && 630 !atomic_dec_return(&mvm->queue_sync_counter)) 631 wake_up(&mvm->rx_sync_waitq); 632 } 633 634 /* 635 * Returns true if the MPDU was buffered\dropped, false if it should be passed 636 * to upper layer. 637 */ 638 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 639 struct napi_struct *napi, 640 int queue, 641 struct ieee80211_sta *sta, 642 struct sk_buff *skb, 643 struct iwl_rx_mpdu_desc *desc) 644 { 645 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 646 struct iwl_mvm_sta *mvm_sta; 647 struct iwl_mvm_baid_data *baid_data; 648 struct iwl_mvm_reorder_buffer *buffer; 649 struct sk_buff *tail; 650 u32 reorder = le32_to_cpu(desc->reorder_data); 651 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 652 bool last_subframe = 653 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 654 u8 tid = ieee80211_get_tid(hdr); 655 u8 sub_frame_idx = desc->amsdu_info & 656 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 657 struct iwl_mvm_reorder_buf_entry *entries; 658 int index; 659 u16 nssn, sn; 660 u8 baid; 661 662 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 663 IWL_RX_MPDU_REORDER_BAID_SHIFT; 664 665 /* 666 * This also covers the case of receiving a Block Ack Request 667 * outside a BA session; we'll pass it to mac80211 and that 668 * then sends a delBA action frame. 669 */ 670 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 671 return false; 672 673 /* no sta yet */ 674 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 675 "Got valid BAID without a valid station assigned\n")) 676 return false; 677 678 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 679 680 /* not a data packet or a bar */ 681 if (!ieee80211_is_back_req(hdr->frame_control) && 682 (!ieee80211_is_data_qos(hdr->frame_control) || 683 is_multicast_ether_addr(hdr->addr1))) 684 return false; 685 686 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 687 return false; 688 689 baid_data = rcu_dereference(mvm->baid_map[baid]); 690 if (!baid_data) { 691 IWL_DEBUG_RX(mvm, 692 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 693 baid, reorder); 694 return false; 695 } 696 697 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 698 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 699 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 700 tid)) 701 return false; 702 703 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 704 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 705 IWL_RX_MPDU_REORDER_SN_SHIFT; 706 707 buffer = &baid_data->reorder_buf[queue]; 708 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 709 710 spin_lock_bh(&buffer->lock); 711 712 if (!buffer->valid) { 713 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 714 spin_unlock_bh(&buffer->lock); 715 return false; 716 } 717 buffer->valid = true; 718 } 719 720 if (ieee80211_is_back_req(hdr->frame_control)) { 721 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 722 goto drop; 723 } 724 725 /* 726 * If there was a significant jump in the nssn - adjust. 727 * If the SN is smaller than the NSSN it might need to first go into 728 * the reorder buffer, in which case we just release up to it and the 729 * rest of the function will take care of storing it and releasing up to 730 * the nssn 731 */ 732 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 733 buffer->buf_size) || 734 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 735 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 736 737 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 738 min_sn); 739 } 740 741 /* drop any oudated packets */ 742 if (ieee80211_sn_less(sn, buffer->head_sn)) 743 goto drop; 744 745 /* release immediately if allowed by nssn and no stored frames */ 746 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 747 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 748 buffer->buf_size) && 749 (!amsdu || last_subframe)) 750 buffer->head_sn = nssn; 751 /* No need to update AMSDU last SN - we are moving the head */ 752 spin_unlock_bh(&buffer->lock); 753 return false; 754 } 755 756 /* 757 * release immediately if there are no stored frames, and the sn is 758 * equal to the head. 759 * This can happen due to reorder timer, where NSSN is behind head_sn. 760 * When we released everything, and we got the next frame in the 761 * sequence, according to the NSSN we can't release immediately, 762 * while technically there is no hole and we can move forward. 763 */ 764 if (!buffer->num_stored && sn == buffer->head_sn) { 765 if (!amsdu || last_subframe) 766 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 767 /* No need to update AMSDU last SN - we are moving the head */ 768 spin_unlock_bh(&buffer->lock); 769 return false; 770 } 771 772 index = sn % buffer->buf_size; 773 774 /* 775 * Check if we already stored this frame 776 * As AMSDU is either received or not as whole, logic is simple: 777 * If we have frames in that position in the buffer and the last frame 778 * originated from AMSDU had a different SN then it is a retransmission. 779 * If it is the same SN then if the subframe index is incrementing it 780 * is the same AMSDU - otherwise it is a retransmission. 781 */ 782 tail = skb_peek_tail(&entries[index].e.frames); 783 if (tail && !amsdu) 784 goto drop; 785 else if (tail && (sn != buffer->last_amsdu || 786 buffer->last_sub_index >= sub_frame_idx)) 787 goto drop; 788 789 /* put in reorder buffer */ 790 __skb_queue_tail(&entries[index].e.frames, skb); 791 buffer->num_stored++; 792 entries[index].e.reorder_time = jiffies; 793 794 if (amsdu) { 795 buffer->last_amsdu = sn; 796 buffer->last_sub_index = sub_frame_idx; 797 } 798 799 /* 800 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 801 * The reason is that NSSN advances on the first sub-frame, and may 802 * cause the reorder buffer to advance before all the sub-frames arrive. 803 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 804 * SN 1. NSSN for first sub frame will be 3 with the result of driver 805 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 806 * already ahead and it will be dropped. 807 * If the last sub-frame is not on this queue - we will get frame 808 * release notification with up to date NSSN. 809 */ 810 if (!amsdu || last_subframe) 811 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn); 812 813 spin_unlock_bh(&buffer->lock); 814 return true; 815 816 drop: 817 kfree_skb(skb); 818 spin_unlock_bh(&buffer->lock); 819 return true; 820 } 821 822 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 823 u32 reorder_data, u8 baid) 824 { 825 unsigned long now = jiffies; 826 unsigned long timeout; 827 struct iwl_mvm_baid_data *data; 828 829 rcu_read_lock(); 830 831 data = rcu_dereference(mvm->baid_map[baid]); 832 if (!data) { 833 IWL_DEBUG_RX(mvm, 834 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 835 baid, reorder_data); 836 goto out; 837 } 838 839 if (!data->timeout) 840 goto out; 841 842 timeout = data->timeout; 843 /* 844 * Do not update last rx all the time to avoid cache bouncing 845 * between the rx queues. 846 * Update it every timeout. Worst case is the session will 847 * expire after ~ 2 * timeout, which doesn't matter that much. 848 */ 849 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 850 /* Update is atomic */ 851 data->last_rx = now; 852 853 out: 854 rcu_read_unlock(); 855 } 856 857 static void iwl_mvm_flip_address(u8 *addr) 858 { 859 int i; 860 u8 mac_addr[ETH_ALEN]; 861 862 for (i = 0; i < ETH_ALEN; i++) 863 mac_addr[i] = addr[ETH_ALEN - i - 1]; 864 ether_addr_copy(addr, mac_addr); 865 } 866 867 struct iwl_mvm_rx_phy_data { 868 enum iwl_rx_phy_info_type info_type; 869 __le32 d0, d1, d2, d3; 870 __le16 d4; 871 }; 872 873 static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm, 874 struct iwl_mvm_rx_phy_data *phy_data, 875 u32 rate_n_flags, 876 struct ieee80211_radiotap_he_mu *he_mu) 877 { 878 u32 phy_data2 = le32_to_cpu(phy_data->d2); 879 u32 phy_data3 = le32_to_cpu(phy_data->d3); 880 u16 phy_data4 = le16_to_cpu(phy_data->d4); 881 882 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) { 883 he_mu->flags1 |= 884 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN | 885 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN); 886 887 he_mu->flags1 |= 888 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU, 889 phy_data4), 890 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU); 891 892 he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0, 893 phy_data2); 894 he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1, 895 phy_data3); 896 he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2, 897 phy_data2); 898 he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3, 899 phy_data3); 900 } 901 902 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) && 903 (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) != RATE_MCS_CHAN_WIDTH_20) { 904 he_mu->flags1 |= 905 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN | 906 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN); 907 908 he_mu->flags2 |= 909 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU, 910 phy_data4), 911 IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU); 912 913 he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0, 914 phy_data2); 915 he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1, 916 phy_data3); 917 he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2, 918 phy_data2); 919 he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3, 920 phy_data3); 921 } 922 } 923 924 static void 925 iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data, 926 u32 rate_n_flags, 927 struct ieee80211_radiotap_he *he, 928 struct ieee80211_radiotap_he_mu *he_mu, 929 struct ieee80211_rx_status *rx_status) 930 { 931 /* 932 * Unfortunately, we have to leave the mac80211 data 933 * incorrect for the case that we receive an HE-MU 934 * transmission and *don't* have the HE phy data (due 935 * to the bits being used for TSF). This shouldn't 936 * happen though as management frames where we need 937 * the TSF/timers are not be transmitted in HE-MU. 938 */ 939 u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK); 940 u8 offs = 0; 941 942 rx_status->bw = RATE_INFO_BW_HE_RU; 943 944 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 945 946 switch (ru) { 947 case 0 ... 36: 948 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26; 949 offs = ru; 950 break; 951 case 37 ... 52: 952 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52; 953 offs = ru - 37; 954 break; 955 case 53 ... 60: 956 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 957 offs = ru - 53; 958 break; 959 case 61 ... 64: 960 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242; 961 offs = ru - 61; 962 break; 963 case 65 ... 66: 964 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484; 965 offs = ru - 65; 966 break; 967 case 67: 968 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996; 969 break; 970 case 68: 971 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; 972 break; 973 } 974 he->data2 |= le16_encode_bits(offs, 975 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); 976 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN | 977 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN); 978 if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80)) 979 he->data2 |= 980 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); 981 982 if (he_mu) { 983 #define CHECK_BW(bw) \ 984 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \ 985 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS) 986 CHECK_BW(20); 987 CHECK_BW(40); 988 CHECK_BW(80); 989 CHECK_BW(160); 990 he_mu->flags2 |= 991 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK, 992 rate_n_flags), 993 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW); 994 } 995 } 996 997 static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm, 998 struct iwl_mvm_rx_phy_data *phy_data, 999 struct ieee80211_radiotap_he *he, 1000 struct ieee80211_radiotap_he_mu *he_mu, 1001 struct ieee80211_rx_status *rx_status, 1002 u32 rate_n_flags, int queue) 1003 { 1004 switch (phy_data->info_type) { 1005 case IWL_RX_PHY_INFO_TYPE_NONE: 1006 case IWL_RX_PHY_INFO_TYPE_CCK: 1007 case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY: 1008 case IWL_RX_PHY_INFO_TYPE_HT: 1009 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1010 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1011 return; 1012 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1013 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN | 1014 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN | 1015 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN | 1016 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN); 1017 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1018 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1), 1019 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1); 1020 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1021 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2), 1022 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2); 1023 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1024 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3), 1025 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3); 1026 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1027 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4), 1028 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4); 1029 /* fall through */ 1030 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1031 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1032 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1033 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1034 /* HE common */ 1035 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN | 1036 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN | 1037 IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN | 1038 IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN); 1039 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN | 1040 IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN | 1041 IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN | 1042 IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1043 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1044 IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK), 1045 IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR); 1046 if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB && 1047 phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) { 1048 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); 1049 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1050 IWL_RX_PHY_DATA0_HE_UPLINK), 1051 IEEE80211_RADIOTAP_HE_DATA3_UL_DL); 1052 } 1053 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1054 IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM), 1055 IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG); 1056 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1057 IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK), 1058 IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE); 1059 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1060 IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK), 1061 IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD); 1062 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1063 IWL_RX_PHY_DATA0_HE_PE_DISAMBIG), 1064 IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG); 1065 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1, 1066 IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK), 1067 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); 1068 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1069 IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK), 1070 IEEE80211_RADIOTAP_HE_DATA6_TXOP); 1071 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1072 IWL_RX_PHY_DATA0_HE_DOPPLER), 1073 IEEE80211_RADIOTAP_HE_DATA6_DOPPLER); 1074 break; 1075 } 1076 1077 switch (phy_data->info_type) { 1078 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1079 he_mu->flags1 |= 1080 le16_encode_bits(le16_get_bits(phy_data->d4, 1081 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM), 1082 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); 1083 he_mu->flags1 |= 1084 le16_encode_bits(le16_get_bits(phy_data->d4, 1085 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK), 1086 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); 1087 he_mu->flags2 |= 1088 le16_encode_bits(le16_get_bits(phy_data->d4, 1089 IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK), 1090 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); 1091 iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu); 1092 /* fall through */ 1093 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1094 he_mu->flags2 |= 1095 le16_encode_bits(le32_get_bits(phy_data->d1, 1096 IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK), 1097 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); 1098 he_mu->flags2 |= 1099 le16_encode_bits(le32_get_bits(phy_data->d1, 1100 IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION), 1101 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); 1102 /* fall through */ 1103 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1104 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1105 iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags, 1106 he, he_mu, rx_status); 1107 break; 1108 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1109 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN); 1110 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1111 IWL_RX_PHY_DATA0_HE_BEAM_CHNG), 1112 IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE); 1113 break; 1114 default: 1115 /* nothing */ 1116 break; 1117 } 1118 } 1119 1120 static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb, 1121 struct iwl_mvm_rx_phy_data *phy_data, 1122 u32 rate_n_flags, u16 phy_info, int queue) 1123 { 1124 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1125 struct ieee80211_radiotap_he *he = NULL; 1126 struct ieee80211_radiotap_he_mu *he_mu = NULL; 1127 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 1128 u8 stbc, ltf; 1129 static const struct ieee80211_radiotap_he known = { 1130 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 1131 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 1132 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | 1133 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), 1134 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | 1135 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), 1136 }; 1137 static const struct ieee80211_radiotap_he_mu mu_known = { 1138 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | 1139 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | 1140 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | 1141 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), 1142 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN | 1143 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN), 1144 }; 1145 unsigned int radiotap_len = 0; 1146 1147 he = skb_put_data(skb, &known, sizeof(known)); 1148 radiotap_len += sizeof(known); 1149 rx_status->flag |= RX_FLAG_RADIOTAP_HE; 1150 1151 if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU || 1152 phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) { 1153 he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known)); 1154 radiotap_len += sizeof(mu_known); 1155 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; 1156 } 1157 1158 /* temporarily hide the radiotap data */ 1159 __skb_pull(skb, radiotap_len); 1160 1161 if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_SU) { 1162 /* report the AMPDU-EOF bit on single frames */ 1163 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1164 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1165 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1166 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1167 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1168 } 1169 } 1170 1171 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1172 iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status, 1173 rate_n_flags, queue); 1174 1175 /* update aggregation data for monitor sake on default queue */ 1176 if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) && 1177 (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1178 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1179 1180 /* toggle is switched whenever new aggregation starts */ 1181 if (toggle_bit != mvm->ampdu_toggle && 1182 (he_type == RATE_MCS_HE_TYPE_MU || 1183 he_type == RATE_MCS_HE_TYPE_SU)) { 1184 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1185 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1186 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1187 } 1188 } 1189 1190 if (he_type == RATE_MCS_HE_TYPE_EXT_SU && 1191 rate_n_flags & RATE_MCS_HE_106T_MSK) { 1192 rx_status->bw = RATE_INFO_BW_HE_RU; 1193 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1194 } 1195 1196 /* actually data is filled in mac80211 */ 1197 if (he_type == RATE_MCS_HE_TYPE_SU || 1198 he_type == RATE_MCS_HE_TYPE_EXT_SU) 1199 he->data1 |= 1200 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1201 1202 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS; 1203 rx_status->nss = 1204 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1205 RATE_VHT_MCS_NSS_POS) + 1; 1206 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1207 rx_status->encoding = RX_ENC_HE; 1208 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1209 if (rate_n_flags & RATE_MCS_BF_MSK) 1210 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1211 1212 rx_status->he_dcm = 1213 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); 1214 1215 #define CHECK_TYPE(F) \ 1216 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ 1217 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) 1218 1219 CHECK_TYPE(SU); 1220 CHECK_TYPE(EXT_SU); 1221 CHECK_TYPE(MU); 1222 CHECK_TYPE(TRIG); 1223 1224 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); 1225 1226 if (rate_n_flags & RATE_MCS_BF_MSK) 1227 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); 1228 1229 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> 1230 RATE_MCS_HE_GI_LTF_POS) { 1231 case 0: 1232 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1233 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1234 else 1235 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1236 if (he_type == RATE_MCS_HE_TYPE_MU) 1237 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1238 else 1239 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X; 1240 break; 1241 case 1: 1242 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1243 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1244 else 1245 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1246 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1247 break; 1248 case 2: 1249 if (he_type == RATE_MCS_HE_TYPE_TRIG) { 1250 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1251 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1252 } else { 1253 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1254 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1255 } 1256 break; 1257 case 3: 1258 if ((he_type == RATE_MCS_HE_TYPE_SU || 1259 he_type == RATE_MCS_HE_TYPE_EXT_SU) && 1260 rate_n_flags & RATE_MCS_SGI_MSK) 1261 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1262 else 1263 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1264 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1265 break; 1266 } 1267 1268 he->data5 |= le16_encode_bits(ltf, 1269 IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE); 1270 } 1271 1272 static void iwl_mvm_decode_lsig(struct sk_buff *skb, 1273 struct iwl_mvm_rx_phy_data *phy_data) 1274 { 1275 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1276 struct ieee80211_radiotap_lsig *lsig; 1277 1278 switch (phy_data->info_type) { 1279 case IWL_RX_PHY_INFO_TYPE_HT: 1280 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1281 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1282 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1283 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1284 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1285 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1286 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1287 lsig = skb_put(skb, sizeof(*lsig)); 1288 lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN); 1289 lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1, 1290 IWL_RX_PHY_DATA1_LSIG_LEN_MASK), 1291 IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH); 1292 rx_status->flag |= RX_FLAG_RADIOTAP_LSIG; 1293 break; 1294 default: 1295 break; 1296 } 1297 } 1298 1299 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 1300 struct iwl_rx_cmd_buffer *rxb, int queue) 1301 { 1302 struct ieee80211_rx_status *rx_status; 1303 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1304 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 1305 struct ieee80211_hdr *hdr; 1306 u32 len = le16_to_cpu(desc->mpdu_len); 1307 u32 rate_n_flags, gp2_on_air_rise; 1308 u16 phy_info = le16_to_cpu(desc->phy_info); 1309 struct ieee80211_sta *sta = NULL; 1310 struct sk_buff *skb; 1311 u8 crypt_len = 0, channel, energy_a, energy_b; 1312 size_t desc_size; 1313 struct iwl_mvm_rx_phy_data phy_data = { 1314 .d4 = desc->phy_data4, 1315 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1316 }; 1317 1318 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1319 return; 1320 1321 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) { 1322 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags); 1323 channel = desc->v3.channel; 1324 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise); 1325 energy_a = desc->v3.energy_a; 1326 energy_b = desc->v3.energy_b; 1327 desc_size = sizeof(*desc); 1328 1329 phy_data.d0 = desc->v3.phy_data0; 1330 phy_data.d1 = desc->v3.phy_data1; 1331 phy_data.d2 = desc->v3.phy_data2; 1332 phy_data.d3 = desc->v3.phy_data3; 1333 } else { 1334 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags); 1335 channel = desc->v1.channel; 1336 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise); 1337 energy_a = desc->v1.energy_a; 1338 energy_b = desc->v1.energy_b; 1339 desc_size = IWL_RX_DESC_SIZE_V1; 1340 1341 phy_data.d0 = desc->v1.phy_data0; 1342 phy_data.d1 = desc->v1.phy_data1; 1343 phy_data.d2 = desc->v1.phy_data2; 1344 phy_data.d3 = desc->v1.phy_data3; 1345 } 1346 1347 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1348 phy_data.info_type = 1349 le32_get_bits(phy_data.d1, 1350 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1351 1352 hdr = (void *)(pkt->data + desc_size); 1353 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1354 * ieee80211_hdr pulled. 1355 */ 1356 skb = alloc_skb(128, GFP_ATOMIC); 1357 if (!skb) { 1358 IWL_ERR(mvm, "alloc_skb failed\n"); 1359 return; 1360 } 1361 1362 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 1363 /* 1364 * If the device inserted padding it means that (it thought) 1365 * the 802.11 header wasn't a multiple of 4 bytes long. In 1366 * this case, reserve two bytes at the start of the SKB to 1367 * align the payload properly in case we end up copying it. 1368 */ 1369 skb_reserve(skb, 2); 1370 } 1371 1372 rx_status = IEEE80211_SKB_RXCB(skb); 1373 1374 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1375 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1376 case RATE_MCS_CHAN_WIDTH_20: 1377 break; 1378 case RATE_MCS_CHAN_WIDTH_40: 1379 rx_status->bw = RATE_INFO_BW_40; 1380 break; 1381 case RATE_MCS_CHAN_WIDTH_80: 1382 rx_status->bw = RATE_INFO_BW_80; 1383 break; 1384 case RATE_MCS_CHAN_WIDTH_160: 1385 rx_status->bw = RATE_INFO_BW_160; 1386 break; 1387 } 1388 1389 if (rate_n_flags & RATE_MCS_HE_MSK) 1390 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1391 phy_info, queue); 1392 1393 iwl_mvm_decode_lsig(skb, &phy_data); 1394 1395 rx_status = IEEE80211_SKB_RXCB(skb); 1396 1397 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc, 1398 le32_to_cpu(pkt->len_n_flags), queue, 1399 &crypt_len)) { 1400 kfree_skb(skb); 1401 return; 1402 } 1403 1404 /* 1405 * Keep packets with CRC errors (and with overrun) for monitor mode 1406 * (otherwise the firmware discards them) but mark them as bad. 1407 */ 1408 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || 1409 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 1410 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 1411 le16_to_cpu(desc->status)); 1412 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 1413 } 1414 /* set the preamble flag if appropriate */ 1415 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 1416 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 1417 1418 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 1419 u64 tsf_on_air_rise; 1420 1421 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) 1422 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise); 1423 else 1424 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise); 1425 1426 rx_status->mactime = tsf_on_air_rise; 1427 /* TSF as indicated by the firmware is at INA time */ 1428 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 1429 } 1430 1431 rx_status->device_timestamp = gp2_on_air_rise; 1432 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1433 NL80211_BAND_2GHZ; 1434 rx_status->freq = ieee80211_channel_to_frequency(channel, 1435 rx_status->band); 1436 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1437 energy_b); 1438 1439 /* update aggregation data for monitor sake on default queue */ 1440 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1441 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1442 1443 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1444 rx_status->ampdu_reference = mvm->ampdu_ref; 1445 /* toggle is switched whenever new aggregation starts */ 1446 if (toggle_bit != mvm->ampdu_toggle) { 1447 mvm->ampdu_ref++; 1448 mvm->ampdu_toggle = toggle_bit; 1449 } 1450 } 1451 1452 rcu_read_lock(); 1453 1454 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 1455 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; 1456 1457 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 1458 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 1459 if (IS_ERR(sta)) 1460 sta = NULL; 1461 } 1462 } else if (!is_multicast_ether_addr(hdr->addr2)) { 1463 /* 1464 * This is fine since we prevent two stations with the same 1465 * address from being added. 1466 */ 1467 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 1468 } 1469 1470 if (sta) { 1471 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1472 struct ieee80211_vif *tx_blocked_vif = 1473 rcu_dereference(mvm->csa_tx_blocked_vif); 1474 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 1475 IWL_RX_MPDU_REORDER_BAID_MASK) >> 1476 IWL_RX_MPDU_REORDER_BAID_SHIFT); 1477 struct iwl_fw_dbg_trigger_tlv *trig; 1478 struct ieee80211_vif *vif = mvmsta->vif; 1479 1480 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 1481 !is_multicast_ether_addr(hdr->addr1) && 1482 ieee80211_is_data(hdr->frame_control) && 1483 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1484 schedule_delayed_work(&mvm->tcm.work, 0); 1485 1486 /* 1487 * We have tx blocked stations (with CS bit). If we heard 1488 * frames from a blocked station on a new channel we can 1489 * TX to it again. 1490 */ 1491 if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) { 1492 struct iwl_mvm_vif *mvmvif = 1493 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1494 1495 if (mvmvif->csa_target_freq == rx_status->freq) 1496 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 1497 false); 1498 } 1499 1500 rs_update_last_rssi(mvm, mvmsta, rx_status); 1501 1502 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 1503 ieee80211_vif_to_wdev(vif), 1504 FW_DBG_TRIGGER_RSSI); 1505 1506 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 1507 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 1508 s32 rssi; 1509 1510 rssi_trig = (void *)trig->data; 1511 rssi = le32_to_cpu(rssi_trig->rssi); 1512 1513 if (rx_status->signal < rssi) 1514 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1515 NULL); 1516 } 1517 1518 if (ieee80211_is_data(hdr->frame_control)) 1519 iwl_mvm_rx_csum(sta, skb, desc); 1520 1521 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1522 kfree_skb(skb); 1523 goto out; 1524 } 1525 1526 /* 1527 * Our hardware de-aggregates AMSDUs but copies the mac header 1528 * as it to the de-aggregated MPDUs. We need to turn off the 1529 * AMSDU bit in the QoS control ourselves. 1530 * In addition, HW reverses addr3 and addr4 - reverse it back. 1531 */ 1532 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1533 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1534 u8 *qc = ieee80211_get_qos_ctl(hdr); 1535 1536 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1537 1538 if (mvm->trans->cfg->device_family == 1539 IWL_DEVICE_FAMILY_9000) { 1540 iwl_mvm_flip_address(hdr->addr3); 1541 1542 if (ieee80211_has_a4(hdr->frame_control)) 1543 iwl_mvm_flip_address(hdr->addr4); 1544 } 1545 } 1546 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1547 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1548 1549 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1550 } 1551 } 1552 1553 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1554 rate_n_flags & RATE_MCS_SGI_MSK) 1555 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1556 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1557 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1558 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1559 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1560 if (rate_n_flags & RATE_MCS_HT_MSK) { 1561 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1562 RATE_MCS_STBC_POS; 1563 rx_status->encoding = RX_ENC_HT; 1564 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1565 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1566 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1567 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1568 RATE_MCS_STBC_POS; 1569 rx_status->nss = 1570 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1571 RATE_VHT_MCS_NSS_POS) + 1; 1572 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1573 rx_status->encoding = RX_ENC_VHT; 1574 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1575 if (rate_n_flags & RATE_MCS_BF_MSK) 1576 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1577 } else if (!(rate_n_flags & RATE_MCS_HE_MSK)) { 1578 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1579 rx_status->band); 1580 1581 if (WARN(rate < 0 || rate > 0xFF, 1582 "Invalid rate flags 0x%x, band %d,\n", 1583 rate_n_flags, rx_status->band)) { 1584 kfree_skb(skb); 1585 goto out; 1586 } 1587 rx_status->rate_idx = rate; 1588 } 1589 1590 /* management stuff on default queue */ 1591 if (!queue) { 1592 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 1593 ieee80211_is_probe_resp(hdr->frame_control)) && 1594 mvm->sched_scan_pass_all == 1595 SCHED_SCAN_PASS_ALL_ENABLED)) 1596 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 1597 1598 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 1599 ieee80211_is_probe_resp(hdr->frame_control))) 1600 rx_status->boottime_ns = ktime_get_boot_ns(); 1601 } 1602 1603 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); 1604 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 1605 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); 1606 out: 1607 rcu_read_unlock(); 1608 } 1609 1610 void iwl_mvm_rx_monitor_ndp(struct iwl_mvm *mvm, struct napi_struct *napi, 1611 struct iwl_rx_cmd_buffer *rxb, int queue) 1612 { 1613 struct ieee80211_rx_status *rx_status; 1614 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1615 struct iwl_rx_no_data *desc = (void *)pkt->data; 1616 u32 rate_n_flags = le32_to_cpu(desc->rate); 1617 u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time); 1618 u32 rssi = le32_to_cpu(desc->rssi); 1619 u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK; 1620 u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD; 1621 struct ieee80211_sta *sta = NULL; 1622 struct sk_buff *skb; 1623 u8 channel, energy_a, energy_b; 1624 struct iwl_mvm_rx_phy_data phy_data = { 1625 .d0 = desc->phy_info[0], 1626 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1627 }; 1628 1629 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1630 return; 1631 1632 /* Currently only NDP type is supported */ 1633 if (info_type != RX_NO_DATA_INFO_TYPE_NDP) 1634 return; 1635 1636 energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS; 1637 energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS; 1638 channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS; 1639 1640 phy_data.info_type = 1641 le32_get_bits(desc->phy_info[1], 1642 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1643 1644 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1645 * ieee80211_hdr pulled. 1646 */ 1647 skb = alloc_skb(128, GFP_ATOMIC); 1648 if (!skb) { 1649 IWL_ERR(mvm, "alloc_skb failed\n"); 1650 return; 1651 } 1652 1653 rx_status = IEEE80211_SKB_RXCB(skb); 1654 1655 /* 0-length PSDU */ 1656 rx_status->flag |= RX_FLAG_NO_PSDU; 1657 /* currently this is the only type for which we get this notif */ 1658 rx_status->zero_length_psdu_type = 1659 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING; 1660 1661 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1662 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1663 case RATE_MCS_CHAN_WIDTH_20: 1664 break; 1665 case RATE_MCS_CHAN_WIDTH_40: 1666 rx_status->bw = RATE_INFO_BW_40; 1667 break; 1668 case RATE_MCS_CHAN_WIDTH_80: 1669 rx_status->bw = RATE_INFO_BW_80; 1670 break; 1671 case RATE_MCS_CHAN_WIDTH_160: 1672 rx_status->bw = RATE_INFO_BW_160; 1673 break; 1674 } 1675 1676 if (rate_n_flags & RATE_MCS_HE_MSK) 1677 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1678 phy_info, queue); 1679 1680 iwl_mvm_decode_lsig(skb, &phy_data); 1681 1682 rx_status->device_timestamp = gp2_on_air_rise; 1683 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1684 NL80211_BAND_2GHZ; 1685 rx_status->freq = ieee80211_channel_to_frequency(channel, 1686 rx_status->band); 1687 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1688 energy_b); 1689 1690 rcu_read_lock(); 1691 1692 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 1693 rate_n_flags & RATE_MCS_SGI_MSK) 1694 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1695 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1696 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 1697 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1698 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1699 if (rate_n_flags & RATE_MCS_HT_MSK) { 1700 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1701 RATE_MCS_STBC_POS; 1702 rx_status->encoding = RX_ENC_HT; 1703 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1704 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1705 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1706 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1707 RATE_MCS_STBC_POS; 1708 rx_status->nss = 1709 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1710 RATE_VHT_MCS_NSS_POS) + 1; 1711 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 1712 rx_status->encoding = RX_ENC_VHT; 1713 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1714 if (rate_n_flags & RATE_MCS_BF_MSK) 1715 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1716 } else if (!(rate_n_flags & RATE_MCS_HE_MSK)) { 1717 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1718 rx_status->band); 1719 1720 if (WARN(rate < 0 || rate > 0xFF, 1721 "Invalid rate flags 0x%x, band %d,\n", 1722 rate_n_flags, rx_status->band)) { 1723 kfree_skb(skb); 1724 goto out; 1725 } 1726 rx_status->rate_idx = rate; 1727 } 1728 1729 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); 1730 out: 1731 rcu_read_unlock(); 1732 } 1733 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 1734 struct iwl_rx_cmd_buffer *rxb, int queue) 1735 { 1736 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1737 struct iwl_frame_release *release = (void *)pkt->data; 1738 struct ieee80211_sta *sta; 1739 struct iwl_mvm_reorder_buffer *reorder_buf; 1740 struct iwl_mvm_baid_data *ba_data; 1741 1742 int baid = release->baid; 1743 1744 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 1745 release->baid, le16_to_cpu(release->nssn)); 1746 1747 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) 1748 return; 1749 1750 rcu_read_lock(); 1751 1752 ba_data = rcu_dereference(mvm->baid_map[baid]); 1753 if (WARN_ON_ONCE(!ba_data)) 1754 goto out; 1755 1756 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 1757 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 1758 goto out; 1759 1760 reorder_buf = &ba_data->reorder_buf[queue]; 1761 1762 spin_lock_bh(&reorder_buf->lock); 1763 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf, 1764 le16_to_cpu(release->nssn)); 1765 spin_unlock_bh(&reorder_buf->lock); 1766 1767 out: 1768 rcu_read_unlock(); 1769 } 1770