1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2015-2017 Intel Deutschland GmbH 6 */ 7 #include <linux/etherdevice.h> 8 #include <linux/skbuff.h> 9 #include "iwl-trans.h" 10 #include "mvm.h" 11 #include "fw-api.h" 12 13 static void *iwl_mvm_skb_get_hdr(struct sk_buff *skb) 14 { 15 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 16 u8 *data = skb->data; 17 18 /* Alignment concerns */ 19 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) % 4); 20 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) % 4); 21 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) % 4); 22 BUILD_BUG_ON(sizeof(struct ieee80211_vendor_radiotap) % 4); 23 24 if (rx_status->flag & RX_FLAG_RADIOTAP_HE) 25 data += sizeof(struct ieee80211_radiotap_he); 26 if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU) 27 data += sizeof(struct ieee80211_radiotap_he_mu); 28 if (rx_status->flag & RX_FLAG_RADIOTAP_LSIG) 29 data += sizeof(struct ieee80211_radiotap_lsig); 30 if (rx_status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { 31 struct ieee80211_vendor_radiotap *radiotap = (void *)data; 32 33 data += sizeof(*radiotap) + radiotap->len + radiotap->pad; 34 } 35 36 return data; 37 } 38 39 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, 40 int queue, struct ieee80211_sta *sta) 41 { 42 struct iwl_mvm_sta *mvmsta; 43 struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb); 44 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); 45 struct iwl_mvm_key_pn *ptk_pn; 46 int res; 47 u8 tid, keyidx; 48 u8 pn[IEEE80211_CCMP_PN_LEN]; 49 u8 *extiv; 50 51 /* do PN checking */ 52 53 /* multicast and non-data only arrives on default queue */ 54 if (!ieee80211_is_data(hdr->frame_control) || 55 is_multicast_ether_addr(hdr->addr1)) 56 return 0; 57 58 /* do not check PN for open AP */ 59 if (!(stats->flag & RX_FLAG_DECRYPTED)) 60 return 0; 61 62 /* 63 * avoid checking for default queue - we don't want to replicate 64 * all the logic that's necessary for checking the PN on fragmented 65 * frames, leave that to mac80211 66 */ 67 if (queue == 0) 68 return 0; 69 70 /* if we are here - this for sure is either CCMP or GCMP */ 71 if (IS_ERR_OR_NULL(sta)) { 72 IWL_DEBUG_DROP(mvm, 73 "expected hw-decrypted unicast frame for station\n"); 74 return -1; 75 } 76 77 mvmsta = iwl_mvm_sta_from_mac80211(sta); 78 79 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 80 keyidx = extiv[3] >> 6; 81 82 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); 83 if (!ptk_pn) 84 return -1; 85 86 if (ieee80211_is_data_qos(hdr->frame_control)) 87 tid = ieee80211_get_tid(hdr); 88 else 89 tid = 0; 90 91 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ 92 if (tid >= IWL_MAX_TID_COUNT) 93 return -1; 94 95 /* load pn */ 96 pn[0] = extiv[7]; 97 pn[1] = extiv[6]; 98 pn[2] = extiv[5]; 99 pn[3] = extiv[4]; 100 pn[4] = extiv[1]; 101 pn[5] = extiv[0]; 102 103 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN); 104 if (res < 0) 105 return -1; 106 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN)) 107 return -1; 108 109 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); 110 stats->flag |= RX_FLAG_PN_VALIDATED; 111 112 return 0; 113 } 114 115 /* iwl_mvm_create_skb Adds the rxb to a new skb */ 116 static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 117 struct ieee80211_hdr *hdr, u16 len, u8 crypt_len, 118 struct iwl_rx_cmd_buffer *rxb) 119 { 120 struct iwl_rx_packet *pkt = rxb_addr(rxb); 121 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 122 unsigned int headlen, fraglen, pad_len = 0; 123 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 124 u8 mic_crc_len = u8_get_bits(desc->mac_flags1, 125 IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK) << 1; 126 127 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 128 len -= 2; 129 pad_len = 2; 130 } 131 132 /* 133 * For non monitor interface strip the bytes the RADA might not have 134 * removed. As monitor interface cannot exist with other interfaces 135 * this removal is safe. 136 */ 137 if (mic_crc_len && !ieee80211_hw_check(mvm->hw, RX_INCLUDES_FCS)) { 138 u32 pkt_flags = le32_to_cpu(pkt->len_n_flags); 139 140 /* 141 * If RADA was not enabled then decryption was not performed so 142 * the MIC cannot be removed. 143 */ 144 if (!(pkt_flags & FH_RSCSR_RADA_EN)) { 145 if (WARN_ON(crypt_len > mic_crc_len)) 146 return -EINVAL; 147 148 mic_crc_len -= crypt_len; 149 } 150 151 if (WARN_ON(mic_crc_len > len)) 152 return -EINVAL; 153 154 len -= mic_crc_len; 155 } 156 157 /* If frame is small enough to fit in skb->head, pull it completely. 158 * If not, only pull ieee80211_hdr (including crypto if present, and 159 * an additional 8 bytes for SNAP/ethertype, see below) so that 160 * splice() or TCP coalesce are more efficient. 161 * 162 * Since, in addition, ieee80211_data_to_8023() always pull in at 163 * least 8 bytes (possibly more for mesh) we can do the same here 164 * to save the cost of doing it later. That still doesn't pull in 165 * the actual IP header since the typical case has a SNAP header. 166 * If the latter changes (there are efforts in the standards group 167 * to do so) we should revisit this and ieee80211_data_to_8023(). 168 */ 169 headlen = (len <= skb_tailroom(skb)) ? len : 170 hdrlen + crypt_len + 8; 171 172 /* The firmware may align the packet to DWORD. 173 * The padding is inserted after the IV. 174 * After copying the header + IV skip the padding if 175 * present before copying packet data. 176 */ 177 hdrlen += crypt_len; 178 179 if (unlikely(headlen < hdrlen)) 180 return -EINVAL; 181 182 skb_put_data(skb, hdr, hdrlen); 183 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen); 184 185 /* 186 * If we did CHECKSUM_COMPLETE, the hardware only does it right for 187 * certain cases and starts the checksum after the SNAP. Check if 188 * this is the case - it's easier to just bail out to CHECKSUM_NONE 189 * in the cases the hardware didn't handle, since it's rare to see 190 * such packets, even though the hardware did calculate the checksum 191 * in this case, just starting after the MAC header instead. 192 * 193 * Starting from Bz hardware, it calculates starting directly after 194 * the MAC header, so that matches mac80211's expectation. 195 */ 196 if (skb->ip_summed == CHECKSUM_COMPLETE && 197 mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ) { 198 struct { 199 u8 hdr[6]; 200 __be16 type; 201 } __packed *shdr = (void *)((u8 *)hdr + hdrlen + pad_len); 202 203 if (unlikely(headlen - hdrlen < sizeof(*shdr) || 204 !ether_addr_equal(shdr->hdr, rfc1042_header) || 205 (shdr->type != htons(ETH_P_IP) && 206 shdr->type != htons(ETH_P_ARP) && 207 shdr->type != htons(ETH_P_IPV6) && 208 shdr->type != htons(ETH_P_8021Q) && 209 shdr->type != htons(ETH_P_PAE) && 210 shdr->type != htons(ETH_P_TDLS)))) 211 skb->ip_summed = CHECKSUM_NONE; 212 } 213 214 fraglen = len - headlen; 215 216 if (fraglen) { 217 int offset = (void *)hdr + headlen + pad_len - 218 rxb_addr(rxb) + rxb_offset(rxb); 219 220 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 221 fraglen, rxb->truesize); 222 } 223 224 return 0; 225 } 226 227 static void iwl_mvm_add_rtap_sniffer_config(struct iwl_mvm *mvm, 228 struct sk_buff *skb) 229 { 230 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 231 struct ieee80211_vendor_radiotap *radiotap; 232 const int size = sizeof(*radiotap) + sizeof(__le16); 233 234 if (!mvm->cur_aid) 235 return; 236 237 /* ensure alignment */ 238 BUILD_BUG_ON((size + 2) % 4); 239 240 radiotap = skb_put(skb, size + 2); 241 radiotap->align = 1; 242 /* Intel OUI */ 243 radiotap->oui[0] = 0xf6; 244 radiotap->oui[1] = 0x54; 245 radiotap->oui[2] = 0x25; 246 /* radiotap sniffer config sub-namespace */ 247 radiotap->subns = 1; 248 radiotap->present = 0x1; 249 radiotap->len = size - sizeof(*radiotap); 250 radiotap->pad = 2; 251 252 /* fill the data now */ 253 memcpy(radiotap->data, &mvm->cur_aid, sizeof(mvm->cur_aid)); 254 /* and clear the padding */ 255 memset(radiotap->data + sizeof(__le16), 0, radiotap->pad); 256 257 rx_status->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA; 258 } 259 260 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ 261 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 262 struct napi_struct *napi, 263 struct sk_buff *skb, int queue, 264 struct ieee80211_sta *sta) 265 { 266 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) 267 kfree_skb(skb); 268 else 269 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 270 } 271 272 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 273 struct ieee80211_rx_status *rx_status, 274 u32 rate_n_flags, int energy_a, 275 int energy_b) 276 { 277 int max_energy; 278 u32 rate_flags = rate_n_flags; 279 280 energy_a = energy_a ? -energy_a : S8_MIN; 281 energy_b = energy_b ? -energy_b : S8_MIN; 282 max_energy = max(energy_a, energy_b); 283 284 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 285 energy_a, energy_b, max_energy); 286 287 rx_status->signal = max_energy; 288 rx_status->chains = 289 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 290 rx_status->chain_signal[0] = energy_a; 291 rx_status->chain_signal[1] = energy_b; 292 } 293 294 static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta, 295 struct ieee80211_hdr *hdr, 296 struct iwl_rx_mpdu_desc *desc, 297 u32 status) 298 { 299 struct iwl_mvm_sta *mvmsta; 300 struct iwl_mvm_vif *mvmvif; 301 u8 keyid; 302 struct ieee80211_key_conf *key; 303 u32 len = le16_to_cpu(desc->mpdu_len); 304 const u8 *frame = (void *)hdr; 305 306 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == IWL_RX_MPDU_STATUS_SEC_NONE) 307 return 0; 308 309 /* 310 * For non-beacon, we don't really care. But beacons may 311 * be filtered out, and we thus need the firmware's replay 312 * detection, otherwise beacons the firmware previously 313 * filtered could be replayed, or something like that, and 314 * it can filter a lot - though usually only if nothing has 315 * changed. 316 */ 317 if (!ieee80211_is_beacon(hdr->frame_control)) 318 return 0; 319 320 /* key mismatch - will also report !MIC_OK but we shouldn't count it */ 321 if (!(status & IWL_RX_MPDU_STATUS_KEY_VALID)) 322 return -1; 323 324 /* good cases */ 325 if (likely(status & IWL_RX_MPDU_STATUS_MIC_OK && 326 !(status & IWL_RX_MPDU_STATUS_REPLAY_ERROR))) 327 return 0; 328 329 if (!sta) 330 return -1; 331 332 mvmsta = iwl_mvm_sta_from_mac80211(sta); 333 334 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 335 336 /* 337 * both keys will have the same cipher and MIC length, use 338 * whichever one is available 339 */ 340 key = rcu_dereference(mvmvif->bcn_prot.keys[0]); 341 if (!key) { 342 key = rcu_dereference(mvmvif->bcn_prot.keys[1]); 343 if (!key) 344 return -1; 345 } 346 347 if (len < key->icv_len + IEEE80211_GMAC_PN_LEN + 2) 348 return -1; 349 350 /* get the real key ID */ 351 keyid = frame[len - key->icv_len - IEEE80211_GMAC_PN_LEN - 2]; 352 /* and if that's the other key, look it up */ 353 if (keyid != key->keyidx) { 354 /* 355 * shouldn't happen since firmware checked, but be safe 356 * in case the MIC length is wrong too, for example 357 */ 358 if (keyid != 6 && keyid != 7) 359 return -1; 360 key = rcu_dereference(mvmvif->bcn_prot.keys[keyid - 6]); 361 if (!key) 362 return -1; 363 } 364 365 /* Report status to mac80211 */ 366 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 367 ieee80211_key_mic_failure(key); 368 else if (status & IWL_RX_MPDU_STATUS_REPLAY_ERROR) 369 ieee80211_key_replay(key); 370 371 return -1; 372 } 373 374 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 375 struct ieee80211_hdr *hdr, 376 struct ieee80211_rx_status *stats, u16 phy_info, 377 struct iwl_rx_mpdu_desc *desc, 378 u32 pkt_flags, int queue, u8 *crypt_len) 379 { 380 u32 status = le32_to_cpu(desc->status); 381 382 /* 383 * Drop UNKNOWN frames in aggregation, unless in monitor mode 384 * (where we don't have the keys). 385 * We limit this to aggregation because in TKIP this is a valid 386 * scenario, since we may not have the (correct) TTAK (phase 1 387 * key) in the firmware. 388 */ 389 if (phy_info & IWL_RX_MPDU_PHY_AMPDU && 390 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 391 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on) 392 return -1; 393 394 if (unlikely(ieee80211_is_mgmt(hdr->frame_control) && 395 !ieee80211_has_protected(hdr->frame_control))) 396 return iwl_mvm_rx_mgmt_prot(sta, hdr, desc, status); 397 398 if (!ieee80211_has_protected(hdr->frame_control) || 399 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 400 IWL_RX_MPDU_STATUS_SEC_NONE) 401 return 0; 402 403 /* TODO: handle packets encrypted with unknown alg */ 404 405 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 406 case IWL_RX_MPDU_STATUS_SEC_CCM: 407 case IWL_RX_MPDU_STATUS_SEC_GCM: 408 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 409 /* alg is CCM: check MIC only */ 410 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 411 return -1; 412 413 stats->flag |= RX_FLAG_DECRYPTED; 414 if (pkt_flags & FH_RSCSR_RADA_EN) 415 stats->flag |= RX_FLAG_MIC_STRIPPED; 416 *crypt_len = IEEE80211_CCMP_HDR_LEN; 417 return 0; 418 case IWL_RX_MPDU_STATUS_SEC_TKIP: 419 /* Don't drop the frame and decrypt it in SW */ 420 if (!fw_has_api(&mvm->fw->ucode_capa, 421 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 422 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 423 return 0; 424 425 if (mvm->trans->trans_cfg->gen2 && 426 !(status & RX_MPDU_RES_STATUS_MIC_OK)) 427 stats->flag |= RX_FLAG_MMIC_ERROR; 428 429 *crypt_len = IEEE80211_TKIP_IV_LEN; 430 fallthrough; 431 case IWL_RX_MPDU_STATUS_SEC_WEP: 432 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 433 return -1; 434 435 stats->flag |= RX_FLAG_DECRYPTED; 436 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 437 IWL_RX_MPDU_STATUS_SEC_WEP) 438 *crypt_len = IEEE80211_WEP_IV_LEN; 439 440 if (pkt_flags & FH_RSCSR_RADA_EN) { 441 stats->flag |= RX_FLAG_ICV_STRIPPED; 442 if (mvm->trans->trans_cfg->gen2) 443 stats->flag |= RX_FLAG_MMIC_STRIPPED; 444 } 445 446 return 0; 447 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 448 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 449 return -1; 450 stats->flag |= RX_FLAG_DECRYPTED; 451 return 0; 452 case RX_MPDU_RES_STATUS_SEC_CMAC_GMAC_ENC: 453 break; 454 default: 455 /* 456 * Sometimes we can get frames that were not decrypted 457 * because the firmware didn't have the keys yet. This can 458 * happen after connection where we can get multicast frames 459 * before the GTK is installed. 460 * Silently drop those frames. 461 * Also drop un-decrypted frames in monitor mode. 462 */ 463 if (!is_multicast_ether_addr(hdr->addr1) && 464 !mvm->monitor_on && net_ratelimit()) 465 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 466 } 467 468 return 0; 469 } 470 471 static void iwl_mvm_rx_csum(struct iwl_mvm *mvm, 472 struct ieee80211_sta *sta, 473 struct sk_buff *skb, 474 struct iwl_rx_packet *pkt) 475 { 476 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 477 478 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 479 if (pkt->len_n_flags & cpu_to_le32(FH_RSCSR_RPA_EN)) { 480 u16 hwsum = be16_to_cpu(desc->v3.raw_xsum); 481 482 skb->ip_summed = CHECKSUM_COMPLETE; 483 skb->csum = csum_unfold(~(__force __sum16)hwsum); 484 } 485 } else { 486 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 487 struct iwl_mvm_vif *mvmvif; 488 u16 flags = le16_to_cpu(desc->l3l4_flags); 489 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 490 IWL_RX_L3_PROTO_POS); 491 492 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 493 494 if (mvmvif->features & NETIF_F_RXCSUM && 495 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 496 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 497 l3_prot == IWL_RX_L3_TYPE_IPV6 || 498 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 499 skb->ip_summed = CHECKSUM_UNNECESSARY; 500 } 501 } 502 503 /* 504 * returns true if a packet is a duplicate and should be dropped. 505 * Updates AMSDU PN tracking info 506 */ 507 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 508 struct ieee80211_rx_status *rx_status, 509 struct ieee80211_hdr *hdr, 510 struct iwl_rx_mpdu_desc *desc) 511 { 512 struct iwl_mvm_sta *mvm_sta; 513 struct iwl_mvm_rxq_dup_data *dup_data; 514 u8 tid, sub_frame_idx; 515 516 if (WARN_ON(IS_ERR_OR_NULL(sta))) 517 return false; 518 519 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 520 dup_data = &mvm_sta->dup_data[queue]; 521 522 /* 523 * Drop duplicate 802.11 retransmissions 524 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 525 */ 526 if (ieee80211_is_ctl(hdr->frame_control) || 527 ieee80211_is_qos_nullfunc(hdr->frame_control) || 528 is_multicast_ether_addr(hdr->addr1)) { 529 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 530 return false; 531 } 532 533 if (ieee80211_is_data_qos(hdr->frame_control)) 534 /* frame has qos control */ 535 tid = ieee80211_get_tid(hdr); 536 else 537 tid = IWL_MAX_TID_COUNT; 538 539 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 540 sub_frame_idx = desc->amsdu_info & 541 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 542 543 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 544 dup_data->last_seq[tid] == hdr->seq_ctrl && 545 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 546 return true; 547 548 /* Allow same PN as the first subframe for following sub frames */ 549 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 550 sub_frame_idx > dup_data->last_sub_frame[tid] && 551 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 552 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 553 554 dup_data->last_seq[tid] = hdr->seq_ctrl; 555 dup_data->last_sub_frame[tid] = sub_frame_idx; 556 557 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 558 559 return false; 560 } 561 562 /* 563 * Returns true if sn2 - buffer_size < sn1 < sn2. 564 * To be used only in order to compare reorder buffer head with NSSN. 565 * We fully trust NSSN unless it is behind us due to reorder timeout. 566 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 567 */ 568 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 569 { 570 return ieee80211_sn_less(sn1, sn2) && 571 !ieee80211_sn_less(sn1, sn2 - buffer_size); 572 } 573 574 static void iwl_mvm_sync_nssn(struct iwl_mvm *mvm, u8 baid, u16 nssn) 575 { 576 if (IWL_MVM_USE_NSSN_SYNC) { 577 struct iwl_mvm_nssn_sync_data notif = { 578 .baid = baid, 579 .nssn = nssn, 580 }; 581 582 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NSSN_SYNC, false, 583 ¬if, sizeof(notif)); 584 } 585 } 586 587 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 588 589 enum iwl_mvm_release_flags { 590 IWL_MVM_RELEASE_SEND_RSS_SYNC = BIT(0), 591 IWL_MVM_RELEASE_FROM_RSS_SYNC = BIT(1), 592 }; 593 594 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 595 struct ieee80211_sta *sta, 596 struct napi_struct *napi, 597 struct iwl_mvm_baid_data *baid_data, 598 struct iwl_mvm_reorder_buffer *reorder_buf, 599 u16 nssn, u32 flags) 600 { 601 struct iwl_mvm_reorder_buf_entry *entries = 602 &baid_data->entries[reorder_buf->queue * 603 baid_data->entries_per_queue]; 604 u16 ssn = reorder_buf->head_sn; 605 606 lockdep_assert_held(&reorder_buf->lock); 607 608 /* 609 * We keep the NSSN not too far behind, if we are sync'ing it and it 610 * is more than 2048 ahead of us, it must be behind us. Discard it. 611 * This can happen if the queue that hit the 0 / 2048 seqno was lagging 612 * behind and this queue already processed packets. The next if 613 * would have caught cases where this queue would have processed less 614 * than 64 packets, but it may have processed more than 64 packets. 615 */ 616 if ((flags & IWL_MVM_RELEASE_FROM_RSS_SYNC) && 617 ieee80211_sn_less(nssn, ssn)) 618 goto set_timer; 619 620 /* ignore nssn smaller than head sn - this can happen due to timeout */ 621 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 622 goto set_timer; 623 624 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 625 int index = ssn % reorder_buf->buf_size; 626 struct sk_buff_head *skb_list = &entries[index].e.frames; 627 struct sk_buff *skb; 628 629 ssn = ieee80211_sn_inc(ssn); 630 if ((flags & IWL_MVM_RELEASE_SEND_RSS_SYNC) && 631 (ssn == 2048 || ssn == 0)) 632 iwl_mvm_sync_nssn(mvm, baid_data->baid, ssn); 633 634 /* 635 * Empty the list. Will have more than one frame for A-MSDU. 636 * Empty list is valid as well since nssn indicates frames were 637 * received. 638 */ 639 while ((skb = __skb_dequeue(skb_list))) { 640 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 641 reorder_buf->queue, 642 sta); 643 reorder_buf->num_stored--; 644 } 645 } 646 reorder_buf->head_sn = nssn; 647 648 set_timer: 649 if (reorder_buf->num_stored && !reorder_buf->removed) { 650 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 651 652 while (skb_queue_empty(&entries[index].e.frames)) 653 index = (index + 1) % reorder_buf->buf_size; 654 /* modify timer to match next frame's expiration time */ 655 mod_timer(&reorder_buf->reorder_timer, 656 entries[index].e.reorder_time + 1 + 657 RX_REORDER_BUF_TIMEOUT_MQ); 658 } else { 659 del_timer(&reorder_buf->reorder_timer); 660 } 661 } 662 663 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 664 { 665 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 666 struct iwl_mvm_baid_data *baid_data = 667 iwl_mvm_baid_data_from_reorder_buf(buf); 668 struct iwl_mvm_reorder_buf_entry *entries = 669 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 670 int i; 671 u16 sn = 0, index = 0; 672 bool expired = false; 673 bool cont = false; 674 675 spin_lock(&buf->lock); 676 677 if (!buf->num_stored || buf->removed) { 678 spin_unlock(&buf->lock); 679 return; 680 } 681 682 for (i = 0; i < buf->buf_size ; i++) { 683 index = (buf->head_sn + i) % buf->buf_size; 684 685 if (skb_queue_empty(&entries[index].e.frames)) { 686 /* 687 * If there is a hole and the next frame didn't expire 688 * we want to break and not advance SN 689 */ 690 cont = false; 691 continue; 692 } 693 if (!cont && 694 !time_after(jiffies, entries[index].e.reorder_time + 695 RX_REORDER_BUF_TIMEOUT_MQ)) 696 break; 697 698 expired = true; 699 /* continue until next hole after this expired frames */ 700 cont = true; 701 sn = ieee80211_sn_add(buf->head_sn, i + 1); 702 } 703 704 if (expired) { 705 struct ieee80211_sta *sta; 706 struct iwl_mvm_sta *mvmsta; 707 u8 sta_id = baid_data->sta_id; 708 709 rcu_read_lock(); 710 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 711 mvmsta = iwl_mvm_sta_from_mac80211(sta); 712 713 /* SN is set to the last expired frame + 1 */ 714 IWL_DEBUG_HT(buf->mvm, 715 "Releasing expired frames for sta %u, sn %d\n", 716 sta_id, sn); 717 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 718 sta, baid_data->tid); 719 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, 720 buf, sn, IWL_MVM_RELEASE_SEND_RSS_SYNC); 721 rcu_read_unlock(); 722 } else { 723 /* 724 * If no frame expired and there are stored frames, index is now 725 * pointing to the first unexpired frame - modify timer 726 * accordingly to this frame. 727 */ 728 mod_timer(&buf->reorder_timer, 729 entries[index].e.reorder_time + 730 1 + RX_REORDER_BUF_TIMEOUT_MQ); 731 } 732 spin_unlock(&buf->lock); 733 } 734 735 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 736 struct iwl_mvm_delba_data *data) 737 { 738 struct iwl_mvm_baid_data *ba_data; 739 struct ieee80211_sta *sta; 740 struct iwl_mvm_reorder_buffer *reorder_buf; 741 u8 baid = data->baid; 742 743 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 744 return; 745 746 rcu_read_lock(); 747 748 ba_data = rcu_dereference(mvm->baid_map[baid]); 749 if (WARN_ON_ONCE(!ba_data)) 750 goto out; 751 752 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 753 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 754 goto out; 755 756 reorder_buf = &ba_data->reorder_buf[queue]; 757 758 /* release all frames that are in the reorder buffer to the stack */ 759 spin_lock_bh(&reorder_buf->lock); 760 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 761 ieee80211_sn_add(reorder_buf->head_sn, 762 reorder_buf->buf_size), 763 0); 764 spin_unlock_bh(&reorder_buf->lock); 765 del_timer_sync(&reorder_buf->reorder_timer); 766 767 out: 768 rcu_read_unlock(); 769 } 770 771 static void iwl_mvm_release_frames_from_notif(struct iwl_mvm *mvm, 772 struct napi_struct *napi, 773 u8 baid, u16 nssn, int queue, 774 u32 flags) 775 { 776 struct ieee80211_sta *sta; 777 struct iwl_mvm_reorder_buffer *reorder_buf; 778 struct iwl_mvm_baid_data *ba_data; 779 780 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 781 baid, nssn); 782 783 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID || 784 baid >= ARRAY_SIZE(mvm->baid_map))) 785 return; 786 787 rcu_read_lock(); 788 789 ba_data = rcu_dereference(mvm->baid_map[baid]); 790 if (!ba_data) { 791 WARN(!(flags & IWL_MVM_RELEASE_FROM_RSS_SYNC), 792 "BAID %d not found in map\n", baid); 793 goto out; 794 } 795 796 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 797 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 798 goto out; 799 800 reorder_buf = &ba_data->reorder_buf[queue]; 801 802 spin_lock_bh(&reorder_buf->lock); 803 iwl_mvm_release_frames(mvm, sta, napi, ba_data, 804 reorder_buf, nssn, flags); 805 spin_unlock_bh(&reorder_buf->lock); 806 807 out: 808 rcu_read_unlock(); 809 } 810 811 static void iwl_mvm_nssn_sync(struct iwl_mvm *mvm, 812 struct napi_struct *napi, int queue, 813 const struct iwl_mvm_nssn_sync_data *data) 814 { 815 iwl_mvm_release_frames_from_notif(mvm, napi, data->baid, 816 data->nssn, queue, 817 IWL_MVM_RELEASE_FROM_RSS_SYNC); 818 } 819 820 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct napi_struct *napi, 821 struct iwl_rx_cmd_buffer *rxb, int queue) 822 { 823 struct iwl_rx_packet *pkt = rxb_addr(rxb); 824 struct iwl_rxq_sync_notification *notif; 825 struct iwl_mvm_internal_rxq_notif *internal_notif; 826 u32 len = iwl_rx_packet_payload_len(pkt); 827 828 notif = (void *)pkt->data; 829 internal_notif = (void *)notif->payload; 830 831 if (WARN_ONCE(len < sizeof(*notif) + sizeof(*internal_notif), 832 "invalid notification size %d (%d)", 833 len, (int)(sizeof(*notif) + sizeof(*internal_notif)))) 834 return; 835 len -= sizeof(*notif) + sizeof(*internal_notif); 836 837 if (internal_notif->sync && 838 mvm->queue_sync_cookie != internal_notif->cookie) { 839 WARN_ONCE(1, "Received expired RX queue sync message\n"); 840 return; 841 } 842 843 switch (internal_notif->type) { 844 case IWL_MVM_RXQ_EMPTY: 845 WARN_ONCE(len, "invalid empty notification size %d", len); 846 break; 847 case IWL_MVM_RXQ_NOTIF_DEL_BA: 848 if (WARN_ONCE(len != sizeof(struct iwl_mvm_delba_data), 849 "invalid delba notification size %d (%d)", 850 len, (int)sizeof(struct iwl_mvm_delba_data))) 851 break; 852 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 853 break; 854 case IWL_MVM_RXQ_NSSN_SYNC: 855 if (WARN_ONCE(len != sizeof(struct iwl_mvm_nssn_sync_data), 856 "invalid nssn sync notification size %d (%d)", 857 len, (int)sizeof(struct iwl_mvm_nssn_sync_data))) 858 break; 859 iwl_mvm_nssn_sync(mvm, napi, queue, 860 (void *)internal_notif->data); 861 break; 862 default: 863 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 864 } 865 866 if (internal_notif->sync) { 867 WARN_ONCE(!test_and_clear_bit(queue, &mvm->queue_sync_state), 868 "queue sync: queue %d responded a second time!\n", 869 queue); 870 if (READ_ONCE(mvm->queue_sync_state) == 0) 871 wake_up(&mvm->rx_sync_waitq); 872 } 873 } 874 875 static void iwl_mvm_oldsn_workaround(struct iwl_mvm *mvm, 876 struct ieee80211_sta *sta, int tid, 877 struct iwl_mvm_reorder_buffer *buffer, 878 u32 reorder, u32 gp2, int queue) 879 { 880 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 881 882 if (gp2 != buffer->consec_oldsn_ampdu_gp2) { 883 /* we have a new (A-)MPDU ... */ 884 885 /* 886 * reset counter to 0 if we didn't have any oldsn in 887 * the last A-MPDU (as detected by GP2 being identical) 888 */ 889 if (!buffer->consec_oldsn_prev_drop) 890 buffer->consec_oldsn_drops = 0; 891 892 /* either way, update our tracking state */ 893 buffer->consec_oldsn_ampdu_gp2 = gp2; 894 } else if (buffer->consec_oldsn_prev_drop) { 895 /* 896 * tracking state didn't change, and we had an old SN 897 * indication before - do nothing in this case, we 898 * already noted this one down and are waiting for the 899 * next A-MPDU (by GP2) 900 */ 901 return; 902 } 903 904 /* return unless this MPDU has old SN */ 905 if (!(reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN)) 906 return; 907 908 /* update state */ 909 buffer->consec_oldsn_prev_drop = 1; 910 buffer->consec_oldsn_drops++; 911 912 /* if limit is reached, send del BA and reset state */ 913 if (buffer->consec_oldsn_drops == IWL_MVM_AMPDU_CONSEC_DROPS_DELBA) { 914 IWL_WARN(mvm, 915 "reached %d old SN frames from %pM on queue %d, stopping BA session on TID %d\n", 916 IWL_MVM_AMPDU_CONSEC_DROPS_DELBA, 917 sta->addr, queue, tid); 918 ieee80211_stop_rx_ba_session(mvmsta->vif, BIT(tid), sta->addr); 919 buffer->consec_oldsn_prev_drop = 0; 920 buffer->consec_oldsn_drops = 0; 921 } 922 } 923 924 /* 925 * Returns true if the MPDU was buffered\dropped, false if it should be passed 926 * to upper layer. 927 */ 928 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 929 struct napi_struct *napi, 930 int queue, 931 struct ieee80211_sta *sta, 932 struct sk_buff *skb, 933 struct iwl_rx_mpdu_desc *desc) 934 { 935 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 936 struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb); 937 struct iwl_mvm_sta *mvm_sta; 938 struct iwl_mvm_baid_data *baid_data; 939 struct iwl_mvm_reorder_buffer *buffer; 940 struct sk_buff *tail; 941 u32 reorder = le32_to_cpu(desc->reorder_data); 942 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 943 bool last_subframe = 944 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 945 u8 tid = ieee80211_get_tid(hdr); 946 u8 sub_frame_idx = desc->amsdu_info & 947 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 948 struct iwl_mvm_reorder_buf_entry *entries; 949 int index; 950 u16 nssn, sn; 951 u8 baid; 952 953 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 954 IWL_RX_MPDU_REORDER_BAID_SHIFT; 955 956 /* 957 * This also covers the case of receiving a Block Ack Request 958 * outside a BA session; we'll pass it to mac80211 and that 959 * then sends a delBA action frame. 960 * This also covers pure monitor mode, in which case we won't 961 * have any BA sessions. 962 */ 963 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 964 return false; 965 966 /* no sta yet */ 967 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 968 "Got valid BAID without a valid station assigned\n")) 969 return false; 970 971 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 972 973 /* not a data packet or a bar */ 974 if (!ieee80211_is_back_req(hdr->frame_control) && 975 (!ieee80211_is_data_qos(hdr->frame_control) || 976 is_multicast_ether_addr(hdr->addr1))) 977 return false; 978 979 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 980 return false; 981 982 baid_data = rcu_dereference(mvm->baid_map[baid]); 983 if (!baid_data) { 984 IWL_DEBUG_RX(mvm, 985 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 986 baid, reorder); 987 return false; 988 } 989 990 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 991 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 992 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 993 tid)) 994 return false; 995 996 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 997 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 998 IWL_RX_MPDU_REORDER_SN_SHIFT; 999 1000 buffer = &baid_data->reorder_buf[queue]; 1001 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 1002 1003 spin_lock_bh(&buffer->lock); 1004 1005 if (!buffer->valid) { 1006 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 1007 spin_unlock_bh(&buffer->lock); 1008 return false; 1009 } 1010 buffer->valid = true; 1011 } 1012 1013 if (ieee80211_is_back_req(hdr->frame_control)) { 1014 iwl_mvm_release_frames(mvm, sta, napi, baid_data, 1015 buffer, nssn, 0); 1016 goto drop; 1017 } 1018 1019 /* 1020 * If there was a significant jump in the nssn - adjust. 1021 * If the SN is smaller than the NSSN it might need to first go into 1022 * the reorder buffer, in which case we just release up to it and the 1023 * rest of the function will take care of storing it and releasing up to 1024 * the nssn. 1025 * This should not happen. This queue has been lagging and it should 1026 * have been updated by a IWL_MVM_RXQ_NSSN_SYNC notification. Be nice 1027 * and update the other queues. 1028 */ 1029 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 1030 buffer->buf_size) || 1031 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 1032 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 1033 1034 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 1035 min_sn, IWL_MVM_RELEASE_SEND_RSS_SYNC); 1036 } 1037 1038 iwl_mvm_oldsn_workaround(mvm, sta, tid, buffer, reorder, 1039 rx_status->device_timestamp, queue); 1040 1041 /* drop any oudated packets */ 1042 if (ieee80211_sn_less(sn, buffer->head_sn)) 1043 goto drop; 1044 1045 /* release immediately if allowed by nssn and no stored frames */ 1046 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 1047 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 1048 buffer->buf_size) && 1049 (!amsdu || last_subframe)) { 1050 /* 1051 * If we crossed the 2048 or 0 SN, notify all the 1052 * queues. This is done in order to avoid having a 1053 * head_sn that lags behind for too long. When that 1054 * happens, we can get to a situation where the head_sn 1055 * is within the interval [nssn - buf_size : nssn] 1056 * which will make us think that the nssn is a packet 1057 * that we already freed because of the reordering 1058 * buffer and we will ignore it. So maintain the 1059 * head_sn somewhat updated across all the queues: 1060 * when it crosses 0 and 2048. 1061 */ 1062 if (sn == 2048 || sn == 0) 1063 iwl_mvm_sync_nssn(mvm, baid, sn); 1064 buffer->head_sn = nssn; 1065 } 1066 /* No need to update AMSDU last SN - we are moving the head */ 1067 spin_unlock_bh(&buffer->lock); 1068 return false; 1069 } 1070 1071 /* 1072 * release immediately if there are no stored frames, and the sn is 1073 * equal to the head. 1074 * This can happen due to reorder timer, where NSSN is behind head_sn. 1075 * When we released everything, and we got the next frame in the 1076 * sequence, according to the NSSN we can't release immediately, 1077 * while technically there is no hole and we can move forward. 1078 */ 1079 if (!buffer->num_stored && sn == buffer->head_sn) { 1080 if (!amsdu || last_subframe) { 1081 if (sn == 2048 || sn == 0) 1082 iwl_mvm_sync_nssn(mvm, baid, sn); 1083 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 1084 } 1085 /* No need to update AMSDU last SN - we are moving the head */ 1086 spin_unlock_bh(&buffer->lock); 1087 return false; 1088 } 1089 1090 index = sn % buffer->buf_size; 1091 1092 /* 1093 * Check if we already stored this frame 1094 * As AMSDU is either received or not as whole, logic is simple: 1095 * If we have frames in that position in the buffer and the last frame 1096 * originated from AMSDU had a different SN then it is a retransmission. 1097 * If it is the same SN then if the subframe index is incrementing it 1098 * is the same AMSDU - otherwise it is a retransmission. 1099 */ 1100 tail = skb_peek_tail(&entries[index].e.frames); 1101 if (tail && !amsdu) 1102 goto drop; 1103 else if (tail && (sn != buffer->last_amsdu || 1104 buffer->last_sub_index >= sub_frame_idx)) 1105 goto drop; 1106 1107 /* put in reorder buffer */ 1108 __skb_queue_tail(&entries[index].e.frames, skb); 1109 buffer->num_stored++; 1110 entries[index].e.reorder_time = jiffies; 1111 1112 if (amsdu) { 1113 buffer->last_amsdu = sn; 1114 buffer->last_sub_index = sub_frame_idx; 1115 } 1116 1117 /* 1118 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 1119 * The reason is that NSSN advances on the first sub-frame, and may 1120 * cause the reorder buffer to advance before all the sub-frames arrive. 1121 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 1122 * SN 1. NSSN for first sub frame will be 3 with the result of driver 1123 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 1124 * already ahead and it will be dropped. 1125 * If the last sub-frame is not on this queue - we will get frame 1126 * release notification with up to date NSSN. 1127 */ 1128 if (!amsdu || last_subframe) 1129 iwl_mvm_release_frames(mvm, sta, napi, baid_data, 1130 buffer, nssn, 1131 IWL_MVM_RELEASE_SEND_RSS_SYNC); 1132 1133 spin_unlock_bh(&buffer->lock); 1134 return true; 1135 1136 drop: 1137 kfree_skb(skb); 1138 spin_unlock_bh(&buffer->lock); 1139 return true; 1140 } 1141 1142 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 1143 u32 reorder_data, u8 baid) 1144 { 1145 unsigned long now = jiffies; 1146 unsigned long timeout; 1147 struct iwl_mvm_baid_data *data; 1148 1149 rcu_read_lock(); 1150 1151 data = rcu_dereference(mvm->baid_map[baid]); 1152 if (!data) { 1153 IWL_DEBUG_RX(mvm, 1154 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 1155 baid, reorder_data); 1156 goto out; 1157 } 1158 1159 if (!data->timeout) 1160 goto out; 1161 1162 timeout = data->timeout; 1163 /* 1164 * Do not update last rx all the time to avoid cache bouncing 1165 * between the rx queues. 1166 * Update it every timeout. Worst case is the session will 1167 * expire after ~ 2 * timeout, which doesn't matter that much. 1168 */ 1169 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 1170 /* Update is atomic */ 1171 data->last_rx = now; 1172 1173 out: 1174 rcu_read_unlock(); 1175 } 1176 1177 static void iwl_mvm_flip_address(u8 *addr) 1178 { 1179 int i; 1180 u8 mac_addr[ETH_ALEN]; 1181 1182 for (i = 0; i < ETH_ALEN; i++) 1183 mac_addr[i] = addr[ETH_ALEN - i - 1]; 1184 ether_addr_copy(addr, mac_addr); 1185 } 1186 1187 struct iwl_mvm_rx_phy_data { 1188 enum iwl_rx_phy_info_type info_type; 1189 __le32 d0, d1, d2, d3; 1190 __le16 d4; 1191 }; 1192 1193 static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm, 1194 struct iwl_mvm_rx_phy_data *phy_data, 1195 u32 rate_n_flags, 1196 struct ieee80211_radiotap_he_mu *he_mu) 1197 { 1198 u32 phy_data2 = le32_to_cpu(phy_data->d2); 1199 u32 phy_data3 = le32_to_cpu(phy_data->d3); 1200 u16 phy_data4 = le16_to_cpu(phy_data->d4); 1201 1202 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) { 1203 he_mu->flags1 |= 1204 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN | 1205 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN); 1206 1207 he_mu->flags1 |= 1208 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU, 1209 phy_data4), 1210 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU); 1211 1212 he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0, 1213 phy_data2); 1214 he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1, 1215 phy_data3); 1216 he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2, 1217 phy_data2); 1218 he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3, 1219 phy_data3); 1220 } 1221 1222 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) && 1223 (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) != RATE_MCS_CHAN_WIDTH_20) { 1224 he_mu->flags1 |= 1225 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN | 1226 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN); 1227 1228 he_mu->flags2 |= 1229 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU, 1230 phy_data4), 1231 IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU); 1232 1233 he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0, 1234 phy_data2); 1235 he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1, 1236 phy_data3); 1237 he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2, 1238 phy_data2); 1239 he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3, 1240 phy_data3); 1241 } 1242 } 1243 1244 static void 1245 iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data, 1246 u32 rate_n_flags, 1247 struct ieee80211_radiotap_he *he, 1248 struct ieee80211_radiotap_he_mu *he_mu, 1249 struct ieee80211_rx_status *rx_status) 1250 { 1251 /* 1252 * Unfortunately, we have to leave the mac80211 data 1253 * incorrect for the case that we receive an HE-MU 1254 * transmission and *don't* have the HE phy data (due 1255 * to the bits being used for TSF). This shouldn't 1256 * happen though as management frames where we need 1257 * the TSF/timers are not be transmitted in HE-MU. 1258 */ 1259 u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK); 1260 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK_V1; 1261 u8 offs = 0; 1262 1263 rx_status->bw = RATE_INFO_BW_HE_RU; 1264 1265 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1266 1267 switch (ru) { 1268 case 0 ... 36: 1269 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26; 1270 offs = ru; 1271 break; 1272 case 37 ... 52: 1273 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52; 1274 offs = ru - 37; 1275 break; 1276 case 53 ... 60: 1277 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1278 offs = ru - 53; 1279 break; 1280 case 61 ... 64: 1281 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242; 1282 offs = ru - 61; 1283 break; 1284 case 65 ... 66: 1285 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484; 1286 offs = ru - 65; 1287 break; 1288 case 67: 1289 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996; 1290 break; 1291 case 68: 1292 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; 1293 break; 1294 } 1295 he->data2 |= le16_encode_bits(offs, 1296 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); 1297 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN | 1298 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN); 1299 if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80)) 1300 he->data2 |= 1301 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); 1302 1303 #define CHECK_BW(bw) \ 1304 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \ 1305 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS); \ 1306 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_ ## bw ## MHZ != \ 1307 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS) 1308 CHECK_BW(20); 1309 CHECK_BW(40); 1310 CHECK_BW(80); 1311 CHECK_BW(160); 1312 1313 if (he_mu) 1314 he_mu->flags2 |= 1315 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1, 1316 rate_n_flags), 1317 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW); 1318 else if (he_type == RATE_MCS_HE_TYPE_TRIG_V1) 1319 he->data6 |= 1320 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_KNOWN) | 1321 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1, 1322 rate_n_flags), 1323 IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW); 1324 } 1325 1326 static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm, 1327 struct iwl_mvm_rx_phy_data *phy_data, 1328 struct ieee80211_radiotap_he *he, 1329 struct ieee80211_radiotap_he_mu *he_mu, 1330 struct ieee80211_rx_status *rx_status, 1331 u32 rate_n_flags, int queue) 1332 { 1333 switch (phy_data->info_type) { 1334 case IWL_RX_PHY_INFO_TYPE_NONE: 1335 case IWL_RX_PHY_INFO_TYPE_CCK: 1336 case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY: 1337 case IWL_RX_PHY_INFO_TYPE_HT: 1338 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1339 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1340 return; 1341 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1342 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN | 1343 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN | 1344 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN | 1345 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN); 1346 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1347 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1), 1348 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1); 1349 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1350 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2), 1351 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2); 1352 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1353 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3), 1354 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3); 1355 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1356 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4), 1357 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4); 1358 fallthrough; 1359 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1360 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1361 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1362 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1363 /* HE common */ 1364 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN | 1365 IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN | 1366 IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN); 1367 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN | 1368 IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN | 1369 IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN | 1370 IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1371 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1372 IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK), 1373 IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR); 1374 if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB && 1375 phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) { 1376 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); 1377 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1378 IWL_RX_PHY_DATA0_HE_UPLINK), 1379 IEEE80211_RADIOTAP_HE_DATA3_UL_DL); 1380 } 1381 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1382 IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM), 1383 IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG); 1384 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1385 IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK), 1386 IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD); 1387 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1388 IWL_RX_PHY_DATA0_HE_PE_DISAMBIG), 1389 IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG); 1390 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1, 1391 IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK), 1392 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); 1393 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1394 IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK), 1395 IEEE80211_RADIOTAP_HE_DATA6_TXOP); 1396 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1397 IWL_RX_PHY_DATA0_HE_DOPPLER), 1398 IEEE80211_RADIOTAP_HE_DATA6_DOPPLER); 1399 break; 1400 } 1401 1402 switch (phy_data->info_type) { 1403 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1404 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1405 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1406 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN); 1407 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1408 IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK), 1409 IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE); 1410 break; 1411 default: 1412 /* nothing here */ 1413 break; 1414 } 1415 1416 switch (phy_data->info_type) { 1417 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1418 he_mu->flags1 |= 1419 le16_encode_bits(le16_get_bits(phy_data->d4, 1420 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM), 1421 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); 1422 he_mu->flags1 |= 1423 le16_encode_bits(le16_get_bits(phy_data->d4, 1424 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK), 1425 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); 1426 he_mu->flags2 |= 1427 le16_encode_bits(le16_get_bits(phy_data->d4, 1428 IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK), 1429 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); 1430 iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu); 1431 fallthrough; 1432 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1433 he_mu->flags2 |= 1434 le16_encode_bits(le32_get_bits(phy_data->d1, 1435 IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK), 1436 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); 1437 he_mu->flags2 |= 1438 le16_encode_bits(le32_get_bits(phy_data->d1, 1439 IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION), 1440 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); 1441 fallthrough; 1442 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1443 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1444 iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags, 1445 he, he_mu, rx_status); 1446 break; 1447 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1448 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN); 1449 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1450 IWL_RX_PHY_DATA0_HE_BEAM_CHNG), 1451 IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE); 1452 break; 1453 default: 1454 /* nothing */ 1455 break; 1456 } 1457 } 1458 1459 static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb, 1460 struct iwl_mvm_rx_phy_data *phy_data, 1461 u32 rate_n_flags, u16 phy_info, int queue) 1462 { 1463 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1464 struct ieee80211_radiotap_he *he = NULL; 1465 struct ieee80211_radiotap_he_mu *he_mu = NULL; 1466 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 1467 u8 stbc, ltf; 1468 static const struct ieee80211_radiotap_he known = { 1469 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 1470 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 1471 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | 1472 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), 1473 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | 1474 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), 1475 }; 1476 static const struct ieee80211_radiotap_he_mu mu_known = { 1477 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | 1478 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | 1479 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | 1480 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), 1481 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN | 1482 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN), 1483 }; 1484 1485 he = skb_put_data(skb, &known, sizeof(known)); 1486 rx_status->flag |= RX_FLAG_RADIOTAP_HE; 1487 1488 if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU || 1489 phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) { 1490 he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known)); 1491 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; 1492 } 1493 1494 /* report the AMPDU-EOF bit on single frames */ 1495 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1496 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1497 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1498 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1499 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1500 } 1501 1502 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1503 iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status, 1504 rate_n_flags, queue); 1505 1506 /* update aggregation data for monitor sake on default queue */ 1507 if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) && 1508 (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1509 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1510 1511 /* toggle is switched whenever new aggregation starts */ 1512 if (toggle_bit != mvm->ampdu_toggle) { 1513 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1514 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1515 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1516 } 1517 } 1518 1519 if (he_type == RATE_MCS_HE_TYPE_EXT_SU && 1520 rate_n_flags & RATE_MCS_HE_106T_MSK) { 1521 rx_status->bw = RATE_INFO_BW_HE_RU; 1522 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1523 } 1524 1525 /* actually data is filled in mac80211 */ 1526 if (he_type == RATE_MCS_HE_TYPE_SU || 1527 he_type == RATE_MCS_HE_TYPE_EXT_SU) 1528 he->data1 |= 1529 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1530 1531 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS; 1532 rx_status->nss = 1533 ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1534 RATE_MCS_NSS_POS) + 1; 1535 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 1536 rx_status->encoding = RX_ENC_HE; 1537 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1538 if (rate_n_flags & RATE_MCS_BF_MSK) 1539 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1540 1541 rx_status->he_dcm = 1542 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); 1543 1544 #define CHECK_TYPE(F) \ 1545 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ 1546 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) 1547 1548 CHECK_TYPE(SU); 1549 CHECK_TYPE(EXT_SU); 1550 CHECK_TYPE(MU); 1551 CHECK_TYPE(TRIG); 1552 1553 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); 1554 1555 if (rate_n_flags & RATE_MCS_BF_MSK) 1556 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); 1557 1558 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> 1559 RATE_MCS_HE_GI_LTF_POS) { 1560 case 0: 1561 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1562 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1563 else 1564 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1565 if (he_type == RATE_MCS_HE_TYPE_MU) 1566 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1567 else 1568 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X; 1569 break; 1570 case 1: 1571 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1572 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1573 else 1574 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1575 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1576 break; 1577 case 2: 1578 if (he_type == RATE_MCS_HE_TYPE_TRIG) { 1579 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1580 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1581 } else { 1582 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1583 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1584 } 1585 break; 1586 case 3: 1587 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1588 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1589 break; 1590 case 4: 1591 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1592 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1593 break; 1594 default: 1595 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_UNKNOWN; 1596 } 1597 1598 he->data5 |= le16_encode_bits(ltf, 1599 IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE); 1600 } 1601 1602 static void iwl_mvm_decode_lsig(struct sk_buff *skb, 1603 struct iwl_mvm_rx_phy_data *phy_data) 1604 { 1605 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1606 struct ieee80211_radiotap_lsig *lsig; 1607 1608 switch (phy_data->info_type) { 1609 case IWL_RX_PHY_INFO_TYPE_HT: 1610 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1611 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1612 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1613 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1614 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1615 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1616 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1617 lsig = skb_put(skb, sizeof(*lsig)); 1618 lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN); 1619 lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1, 1620 IWL_RX_PHY_DATA1_LSIG_LEN_MASK), 1621 IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH); 1622 rx_status->flag |= RX_FLAG_RADIOTAP_LSIG; 1623 break; 1624 default: 1625 break; 1626 } 1627 } 1628 1629 static inline u8 iwl_mvm_nl80211_band_from_rx_msdu(u8 phy_band) 1630 { 1631 switch (phy_band) { 1632 case PHY_BAND_24: 1633 return NL80211_BAND_2GHZ; 1634 case PHY_BAND_5: 1635 return NL80211_BAND_5GHZ; 1636 case PHY_BAND_6: 1637 return NL80211_BAND_6GHZ; 1638 default: 1639 WARN_ONCE(1, "Unsupported phy band (%u)\n", phy_band); 1640 return NL80211_BAND_5GHZ; 1641 } 1642 } 1643 1644 struct iwl_rx_sta_csa { 1645 bool all_sta_unblocked; 1646 struct ieee80211_vif *vif; 1647 }; 1648 1649 static void iwl_mvm_rx_get_sta_block_tx(void *data, struct ieee80211_sta *sta) 1650 { 1651 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1652 struct iwl_rx_sta_csa *rx_sta_csa = data; 1653 1654 if (mvmsta->vif != rx_sta_csa->vif) 1655 return; 1656 1657 if (mvmsta->disable_tx) 1658 rx_sta_csa->all_sta_unblocked = false; 1659 } 1660 1661 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 1662 struct iwl_rx_cmd_buffer *rxb, int queue) 1663 { 1664 struct ieee80211_rx_status *rx_status; 1665 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1666 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 1667 struct ieee80211_hdr *hdr; 1668 u32 len; 1669 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 1670 u32 rate_n_flags, gp2_on_air_rise; 1671 u16 phy_info; 1672 struct ieee80211_sta *sta = NULL; 1673 struct sk_buff *skb; 1674 u8 crypt_len = 0, channel, energy_a, energy_b; 1675 size_t desc_size; 1676 struct iwl_mvm_rx_phy_data phy_data = { 1677 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1678 }; 1679 u32 format; 1680 bool is_sgi; 1681 1682 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1683 return; 1684 1685 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1686 desc_size = sizeof(*desc); 1687 else 1688 desc_size = IWL_RX_DESC_SIZE_V1; 1689 1690 if (unlikely(pkt_len < desc_size)) { 1691 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n"); 1692 return; 1693 } 1694 1695 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 1696 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags); 1697 channel = desc->v3.channel; 1698 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise); 1699 energy_a = desc->v3.energy_a; 1700 energy_b = desc->v3.energy_b; 1701 1702 phy_data.d0 = desc->v3.phy_data0; 1703 phy_data.d1 = desc->v3.phy_data1; 1704 phy_data.d2 = desc->v3.phy_data2; 1705 phy_data.d3 = desc->v3.phy_data3; 1706 } else { 1707 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags); 1708 channel = desc->v1.channel; 1709 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise); 1710 energy_a = desc->v1.energy_a; 1711 energy_b = desc->v1.energy_b; 1712 1713 phy_data.d0 = desc->v1.phy_data0; 1714 phy_data.d1 = desc->v1.phy_data1; 1715 phy_data.d2 = desc->v1.phy_data2; 1716 phy_data.d3 = desc->v1.phy_data3; 1717 } 1718 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 1719 REPLY_RX_MPDU_CMD, 0) < 4) { 1720 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1721 IWL_DEBUG_DROP(mvm, "Got old format rate, converting. New rate: 0x%x\n", 1722 rate_n_flags); 1723 } 1724 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1725 1726 len = le16_to_cpu(desc->mpdu_len); 1727 1728 if (unlikely(len + desc_size > pkt_len)) { 1729 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 1730 return; 1731 } 1732 1733 phy_info = le16_to_cpu(desc->phy_info); 1734 phy_data.d4 = desc->phy_data4; 1735 1736 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1737 phy_data.info_type = 1738 le32_get_bits(phy_data.d1, 1739 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1740 1741 hdr = (void *)(pkt->data + desc_size); 1742 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1743 * ieee80211_hdr pulled. 1744 */ 1745 skb = alloc_skb(128, GFP_ATOMIC); 1746 if (!skb) { 1747 IWL_ERR(mvm, "alloc_skb failed\n"); 1748 return; 1749 } 1750 1751 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 1752 /* 1753 * If the device inserted padding it means that (it thought) 1754 * the 802.11 header wasn't a multiple of 4 bytes long. In 1755 * this case, reserve two bytes at the start of the SKB to 1756 * align the payload properly in case we end up copying it. 1757 */ 1758 skb_reserve(skb, 2); 1759 } 1760 1761 rx_status = IEEE80211_SKB_RXCB(skb); 1762 1763 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1764 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1765 case RATE_MCS_CHAN_WIDTH_20: 1766 break; 1767 case RATE_MCS_CHAN_WIDTH_40: 1768 rx_status->bw = RATE_INFO_BW_40; 1769 break; 1770 case RATE_MCS_CHAN_WIDTH_80: 1771 rx_status->bw = RATE_INFO_BW_80; 1772 break; 1773 case RATE_MCS_CHAN_WIDTH_160: 1774 rx_status->bw = RATE_INFO_BW_160; 1775 break; 1776 } 1777 1778 if (format == RATE_MCS_HE_MSK) 1779 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1780 phy_info, queue); 1781 1782 iwl_mvm_decode_lsig(skb, &phy_data); 1783 1784 /* 1785 * Keep packets with CRC errors (and with overrun) for monitor mode 1786 * (otherwise the firmware discards them) but mark them as bad. 1787 */ 1788 if (!(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_CRC_OK)) || 1789 !(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 1790 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 1791 le32_to_cpu(desc->status)); 1792 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 1793 } 1794 /* set the preamble flag if appropriate */ 1795 if (format == RATE_MCS_CCK_MSK && 1796 phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 1797 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 1798 1799 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 1800 u64 tsf_on_air_rise; 1801 1802 if (mvm->trans->trans_cfg->device_family >= 1803 IWL_DEVICE_FAMILY_AX210) 1804 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise); 1805 else 1806 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise); 1807 1808 rx_status->mactime = tsf_on_air_rise; 1809 /* TSF as indicated by the firmware is at INA time */ 1810 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 1811 } 1812 1813 rx_status->device_timestamp = gp2_on_air_rise; 1814 if (iwl_mvm_is_band_in_rx_supported(mvm)) { 1815 u8 band = BAND_IN_RX_STATUS(desc->mac_phy_idx); 1816 1817 rx_status->band = iwl_mvm_nl80211_band_from_rx_msdu(band); 1818 } else { 1819 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1820 NL80211_BAND_2GHZ; 1821 } 1822 rx_status->freq = ieee80211_channel_to_frequency(channel, 1823 rx_status->band); 1824 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1825 energy_b); 1826 1827 /* update aggregation data for monitor sake on default queue */ 1828 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1829 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1830 1831 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1832 /* 1833 * Toggle is switched whenever new aggregation starts. Make 1834 * sure ampdu_reference is never 0 so we can later use it to 1835 * see if the frame was really part of an A-MPDU or not. 1836 */ 1837 if (toggle_bit != mvm->ampdu_toggle) { 1838 mvm->ampdu_ref++; 1839 if (mvm->ampdu_ref == 0) 1840 mvm->ampdu_ref++; 1841 mvm->ampdu_toggle = toggle_bit; 1842 } 1843 rx_status->ampdu_reference = mvm->ampdu_ref; 1844 } 1845 1846 if (unlikely(mvm->monitor_on)) 1847 iwl_mvm_add_rtap_sniffer_config(mvm, skb); 1848 1849 rcu_read_lock(); 1850 1851 if (desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 1852 u8 id = le32_get_bits(desc->status, IWL_RX_MPDU_STATUS_STA_ID); 1853 1854 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 1855 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 1856 if (IS_ERR(sta)) 1857 sta = NULL; 1858 } 1859 } else if (!is_multicast_ether_addr(hdr->addr2)) { 1860 /* 1861 * This is fine since we prevent two stations with the same 1862 * address from being added. 1863 */ 1864 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 1865 } 1866 1867 if (iwl_mvm_rx_crypto(mvm, sta, hdr, rx_status, phy_info, desc, 1868 le32_to_cpu(pkt->len_n_flags), queue, 1869 &crypt_len)) { 1870 kfree_skb(skb); 1871 goto out; 1872 } 1873 1874 if (sta) { 1875 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1876 struct ieee80211_vif *tx_blocked_vif = 1877 rcu_dereference(mvm->csa_tx_blocked_vif); 1878 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 1879 IWL_RX_MPDU_REORDER_BAID_MASK) >> 1880 IWL_RX_MPDU_REORDER_BAID_SHIFT); 1881 struct iwl_fw_dbg_trigger_tlv *trig; 1882 struct ieee80211_vif *vif = mvmsta->vif; 1883 1884 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 1885 !is_multicast_ether_addr(hdr->addr1) && 1886 ieee80211_is_data(hdr->frame_control) && 1887 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1888 schedule_delayed_work(&mvm->tcm.work, 0); 1889 1890 /* 1891 * We have tx blocked stations (with CS bit). If we heard 1892 * frames from a blocked station on a new channel we can 1893 * TX to it again. 1894 */ 1895 if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) { 1896 struct iwl_mvm_vif *mvmvif = 1897 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1898 struct iwl_rx_sta_csa rx_sta_csa = { 1899 .all_sta_unblocked = true, 1900 .vif = tx_blocked_vif, 1901 }; 1902 1903 if (mvmvif->csa_target_freq == rx_status->freq) 1904 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 1905 false); 1906 ieee80211_iterate_stations_atomic(mvm->hw, 1907 iwl_mvm_rx_get_sta_block_tx, 1908 &rx_sta_csa); 1909 1910 if (rx_sta_csa.all_sta_unblocked) { 1911 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1912 /* Unblock BCAST / MCAST station */ 1913 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1914 cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork); 1915 } 1916 } 1917 1918 rs_update_last_rssi(mvm, mvmsta, rx_status); 1919 1920 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 1921 ieee80211_vif_to_wdev(vif), 1922 FW_DBG_TRIGGER_RSSI); 1923 1924 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 1925 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 1926 s32 rssi; 1927 1928 rssi_trig = (void *)trig->data; 1929 rssi = le32_to_cpu(rssi_trig->rssi); 1930 1931 if (rx_status->signal < rssi) 1932 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1933 NULL); 1934 } 1935 1936 if (ieee80211_is_data(hdr->frame_control)) 1937 iwl_mvm_rx_csum(mvm, sta, skb, pkt); 1938 1939 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1940 kfree_skb(skb); 1941 goto out; 1942 } 1943 1944 /* 1945 * Our hardware de-aggregates AMSDUs but copies the mac header 1946 * as it to the de-aggregated MPDUs. We need to turn off the 1947 * AMSDU bit in the QoS control ourselves. 1948 * In addition, HW reverses addr3 and addr4 - reverse it back. 1949 */ 1950 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1951 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1952 u8 *qc = ieee80211_get_qos_ctl(hdr); 1953 1954 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1955 1956 if (mvm->trans->trans_cfg->device_family == 1957 IWL_DEVICE_FAMILY_9000) { 1958 iwl_mvm_flip_address(hdr->addr3); 1959 1960 if (ieee80211_has_a4(hdr->frame_control)) 1961 iwl_mvm_flip_address(hdr->addr4); 1962 } 1963 } 1964 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1965 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1966 1967 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1968 } 1969 } 1970 1971 is_sgi = format == RATE_MCS_HE_MSK ? 1972 iwl_he_is_sgi(rate_n_flags) : 1973 rate_n_flags & RATE_MCS_SGI_MSK; 1974 1975 if (!(format == RATE_MCS_CCK_MSK) && is_sgi) 1976 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1977 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1978 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 1979 if (format == RATE_MCS_HT_MSK) { 1980 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1981 RATE_MCS_STBC_POS; 1982 rx_status->encoding = RX_ENC_HT; 1983 rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags); 1984 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1985 } else if (format == RATE_MCS_VHT_MSK) { 1986 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 1987 RATE_MCS_STBC_POS; 1988 rx_status->nss = ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1989 RATE_MCS_NSS_POS) + 1; 1990 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 1991 rx_status->encoding = RX_ENC_VHT; 1992 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1993 if (rate_n_flags & RATE_MCS_BF_MSK) 1994 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1995 } else if (!(format == RATE_MCS_HE_MSK)) { 1996 int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1997 rx_status->band); 1998 1999 if (WARN(rate < 0 || rate > 0xFF, 2000 "Invalid rate flags 0x%x, band %d,\n", 2001 rate_n_flags, rx_status->band)) { 2002 kfree_skb(skb); 2003 goto out; 2004 } 2005 rx_status->rate_idx = rate; 2006 } 2007 2008 /* management stuff on default queue */ 2009 if (!queue) { 2010 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 2011 ieee80211_is_probe_resp(hdr->frame_control)) && 2012 mvm->sched_scan_pass_all == 2013 SCHED_SCAN_PASS_ALL_ENABLED)) 2014 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 2015 2016 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 2017 ieee80211_is_probe_resp(hdr->frame_control))) 2018 rx_status->boottime_ns = ktime_get_boottime_ns(); 2019 } 2020 2021 if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) { 2022 kfree_skb(skb); 2023 goto out; 2024 } 2025 2026 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 2027 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, 2028 sta); 2029 out: 2030 rcu_read_unlock(); 2031 } 2032 2033 void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi, 2034 struct iwl_rx_cmd_buffer *rxb, int queue) 2035 { 2036 struct ieee80211_rx_status *rx_status; 2037 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2038 struct iwl_rx_no_data *desc = (void *)pkt->data; 2039 u32 rate_n_flags = le32_to_cpu(desc->rate); 2040 u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time); 2041 u32 rssi = le32_to_cpu(desc->rssi); 2042 u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK; 2043 u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD; 2044 struct ieee80211_sta *sta = NULL; 2045 struct sk_buff *skb; 2046 u8 channel, energy_a, energy_b; 2047 u32 format; 2048 struct iwl_mvm_rx_phy_data phy_data = { 2049 .info_type = le32_get_bits(desc->phy_info[1], 2050 IWL_RX_PHY_DATA1_INFO_TYPE_MASK), 2051 .d0 = desc->phy_info[0], 2052 .d1 = desc->phy_info[1], 2053 }; 2054 bool is_sgi; 2055 2056 if (iwl_fw_lookup_notif_ver(mvm->fw, DATA_PATH_GROUP, 2057 RX_NO_DATA_NOTIF, 0) < 2) { 2058 IWL_DEBUG_DROP(mvm, "Got an old rate format. Old rate: 0x%x\n", 2059 rate_n_flags); 2060 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 2061 IWL_DEBUG_DROP(mvm, " Rate after conversion to the new format: 0x%x\n", 2062 rate_n_flags); 2063 } 2064 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 2065 2066 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*desc))) 2067 return; 2068 2069 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 2070 return; 2071 2072 energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS; 2073 energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS; 2074 channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS; 2075 2076 /* Dont use dev_alloc_skb(), we'll have enough headroom once 2077 * ieee80211_hdr pulled. 2078 */ 2079 skb = alloc_skb(128, GFP_ATOMIC); 2080 if (!skb) { 2081 IWL_ERR(mvm, "alloc_skb failed\n"); 2082 return; 2083 } 2084 2085 rx_status = IEEE80211_SKB_RXCB(skb); 2086 2087 /* 0-length PSDU */ 2088 rx_status->flag |= RX_FLAG_NO_PSDU; 2089 2090 switch (info_type) { 2091 case RX_NO_DATA_INFO_TYPE_NDP: 2092 rx_status->zero_length_psdu_type = 2093 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING; 2094 break; 2095 case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED: 2096 case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED: 2097 rx_status->zero_length_psdu_type = 2098 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED; 2099 break; 2100 default: 2101 rx_status->zero_length_psdu_type = 2102 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR; 2103 break; 2104 } 2105 2106 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 2107 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 2108 case RATE_MCS_CHAN_WIDTH_20: 2109 break; 2110 case RATE_MCS_CHAN_WIDTH_40: 2111 rx_status->bw = RATE_INFO_BW_40; 2112 break; 2113 case RATE_MCS_CHAN_WIDTH_80: 2114 rx_status->bw = RATE_INFO_BW_80; 2115 break; 2116 case RATE_MCS_CHAN_WIDTH_160: 2117 rx_status->bw = RATE_INFO_BW_160; 2118 break; 2119 } 2120 2121 if (format == RATE_MCS_HE_MSK) 2122 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 2123 phy_info, queue); 2124 2125 iwl_mvm_decode_lsig(skb, &phy_data); 2126 2127 rx_status->device_timestamp = gp2_on_air_rise; 2128 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 2129 NL80211_BAND_2GHZ; 2130 rx_status->freq = ieee80211_channel_to_frequency(channel, 2131 rx_status->band); 2132 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 2133 energy_b); 2134 2135 rcu_read_lock(); 2136 2137 is_sgi = format == RATE_MCS_HE_MSK ? 2138 iwl_he_is_sgi(rate_n_flags) : 2139 rate_n_flags & RATE_MCS_SGI_MSK; 2140 2141 if (!(format == RATE_MCS_CCK_MSK) && is_sgi) 2142 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 2143 if (rate_n_flags & RATE_MCS_LDPC_MSK) 2144 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 2145 if (format == RATE_MCS_HT_MSK) { 2146 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2147 RATE_MCS_STBC_POS; 2148 rx_status->encoding = RX_ENC_HT; 2149 rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags); 2150 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2151 } else if (format == RATE_MCS_VHT_MSK) { 2152 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2153 RATE_MCS_STBC_POS; 2154 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 2155 rx_status->encoding = RX_ENC_VHT; 2156 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2157 if (rate_n_flags & RATE_MCS_BF_MSK) 2158 rx_status->enc_flags |= RX_ENC_FLAG_BF; 2159 /* 2160 * take the nss from the rx_vec since the rate_n_flags has 2161 * only 2 bits for the nss which gives a max of 4 ss but 2162 * there may be up to 8 spatial streams 2163 */ 2164 rx_status->nss = 2165 le32_get_bits(desc->rx_vec[0], 2166 RX_NO_DATA_RX_VEC0_VHT_NSTS_MSK) + 1; 2167 } else if (format == RATE_MCS_HE_MSK) { 2168 rx_status->nss = 2169 le32_get_bits(desc->rx_vec[0], 2170 RX_NO_DATA_RX_VEC0_HE_NSTS_MSK) + 1; 2171 } else { 2172 int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 2173 rx_status->band); 2174 2175 if (WARN(rate < 0 || rate > 0xFF, 2176 "Invalid rate flags 0x%x, band %d,\n", 2177 rate_n_flags, rx_status->band)) { 2178 kfree_skb(skb); 2179 goto out; 2180 } 2181 rx_status->rate_idx = rate; 2182 } 2183 2184 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 2185 out: 2186 rcu_read_unlock(); 2187 } 2188 2189 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 2190 struct iwl_rx_cmd_buffer *rxb, int queue) 2191 { 2192 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2193 struct iwl_frame_release *release = (void *)pkt->data; 2194 2195 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release))) 2196 return; 2197 2198 iwl_mvm_release_frames_from_notif(mvm, napi, release->baid, 2199 le16_to_cpu(release->nssn), 2200 queue, 0); 2201 } 2202 2203 void iwl_mvm_rx_bar_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 2204 struct iwl_rx_cmd_buffer *rxb, int queue) 2205 { 2206 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2207 struct iwl_bar_frame_release *release = (void *)pkt->data; 2208 unsigned int baid = le32_get_bits(release->ba_info, 2209 IWL_BAR_FRAME_RELEASE_BAID_MASK); 2210 unsigned int nssn = le32_get_bits(release->ba_info, 2211 IWL_BAR_FRAME_RELEASE_NSSN_MASK); 2212 unsigned int sta_id = le32_get_bits(release->sta_tid, 2213 IWL_BAR_FRAME_RELEASE_STA_MASK); 2214 unsigned int tid = le32_get_bits(release->sta_tid, 2215 IWL_BAR_FRAME_RELEASE_TID_MASK); 2216 struct iwl_mvm_baid_data *baid_data; 2217 2218 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release))) 2219 return; 2220 2221 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID || 2222 baid >= ARRAY_SIZE(mvm->baid_map))) 2223 return; 2224 2225 rcu_read_lock(); 2226 baid_data = rcu_dereference(mvm->baid_map[baid]); 2227 if (!baid_data) { 2228 IWL_DEBUG_RX(mvm, 2229 "Got valid BAID %d but not allocated, invalid BAR release!\n", 2230 baid); 2231 goto out; 2232 } 2233 2234 if (WARN(tid != baid_data->tid || sta_id != baid_data->sta_id, 2235 "baid 0x%x is mapped to sta:%d tid:%d, but BAR release received for sta:%d tid:%d\n", 2236 baid, baid_data->sta_id, baid_data->tid, sta_id, 2237 tid)) 2238 goto out; 2239 2240 iwl_mvm_release_frames_from_notif(mvm, napi, baid, nssn, queue, 0); 2241 out: 2242 rcu_read_unlock(); 2243 } 2244