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 #if defined(__FreeBSD__) 10 #include <net/ieee80211_radiotap.h> 11 #endif 12 #include "iwl-trans.h" 13 #include "mvm.h" 14 #include "fw-api.h" 15 16 static void *iwl_mvm_skb_get_hdr(struct sk_buff *skb) 17 { 18 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 19 u8 *data = skb->data; 20 21 /* Alignment concerns */ 22 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) % 4); 23 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) % 4); 24 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) % 4); 25 BUILD_BUG_ON(sizeof(struct ieee80211_vendor_radiotap) % 4); 26 27 if (rx_status->flag & RX_FLAG_RADIOTAP_HE) 28 data += sizeof(struct ieee80211_radiotap_he); 29 if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU) 30 data += sizeof(struct ieee80211_radiotap_he_mu); 31 if (rx_status->flag & RX_FLAG_RADIOTAP_LSIG) 32 data += sizeof(struct ieee80211_radiotap_lsig); 33 if (rx_status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) { 34 struct ieee80211_vendor_radiotap *radiotap = (void *)data; 35 36 data += sizeof(*radiotap) + radiotap->len + radiotap->pad; 37 } 38 39 return data; 40 } 41 42 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, 43 int queue, struct ieee80211_sta *sta) 44 { 45 struct iwl_mvm_sta *mvmsta; 46 struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb); 47 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); 48 struct iwl_mvm_key_pn *ptk_pn; 49 int res; 50 u8 tid, keyidx; 51 u8 pn[IEEE80211_CCMP_PN_LEN]; 52 u8 *extiv; 53 54 /* do PN checking */ 55 56 /* multicast and non-data only arrives on default queue */ 57 if (!ieee80211_is_data(hdr->frame_control) || 58 is_multicast_ether_addr(hdr->addr1)) 59 return 0; 60 61 /* do not check PN for open AP */ 62 if (!(stats->flag & RX_FLAG_DECRYPTED)) 63 return 0; 64 65 /* 66 * avoid checking for default queue - we don't want to replicate 67 * all the logic that's necessary for checking the PN on fragmented 68 * frames, leave that to mac80211 69 */ 70 if (queue == 0) 71 return 0; 72 73 /* if we are here - this for sure is either CCMP or GCMP */ 74 if (IS_ERR_OR_NULL(sta)) { 75 IWL_DEBUG_DROP(mvm, 76 "expected hw-decrypted unicast frame for station\n"); 77 return -1; 78 } 79 80 mvmsta = iwl_mvm_sta_from_mac80211(sta); 81 82 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 83 keyidx = extiv[3] >> 6; 84 85 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); 86 if (!ptk_pn) 87 return -1; 88 89 if (ieee80211_is_data_qos(hdr->frame_control)) 90 tid = ieee80211_get_tid(hdr); 91 else 92 tid = 0; 93 94 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ 95 if (tid >= IWL_MAX_TID_COUNT) 96 return -1; 97 98 /* load pn */ 99 pn[0] = extiv[7]; 100 pn[1] = extiv[6]; 101 pn[2] = extiv[5]; 102 pn[3] = extiv[4]; 103 pn[4] = extiv[1]; 104 pn[5] = extiv[0]; 105 106 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN); 107 if (res < 0) 108 return -1; 109 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN)) 110 return -1; 111 112 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); 113 stats->flag |= RX_FLAG_PN_VALIDATED; 114 115 return 0; 116 } 117 118 /* iwl_mvm_create_skb Adds the rxb to a new skb */ 119 static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 120 struct ieee80211_hdr *hdr, u16 len, u8 crypt_len, 121 struct iwl_rx_cmd_buffer *rxb) 122 { 123 struct iwl_rx_packet *pkt = rxb_addr(rxb); 124 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 125 unsigned int headlen, fraglen, pad_len = 0; 126 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 127 u8 mic_crc_len = u8_get_bits(desc->mac_flags1, 128 IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK) << 1; 129 130 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 131 len -= 2; 132 pad_len = 2; 133 } 134 135 /* 136 * For non monitor interface strip the bytes the RADA might not have 137 * removed. As monitor interface cannot exist with other interfaces 138 * this removal is safe. 139 */ 140 if (mic_crc_len && !ieee80211_hw_check(mvm->hw, RX_INCLUDES_FCS)) { 141 u32 pkt_flags = le32_to_cpu(pkt->len_n_flags); 142 143 /* 144 * If RADA was not enabled then decryption was not performed so 145 * the MIC cannot be removed. 146 */ 147 if (!(pkt_flags & FH_RSCSR_RADA_EN)) { 148 if (WARN_ON(crypt_len > mic_crc_len)) 149 return -EINVAL; 150 151 mic_crc_len -= crypt_len; 152 } 153 154 if (WARN_ON(mic_crc_len > len)) 155 return -EINVAL; 156 157 len -= mic_crc_len; 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; 181 182 if (unlikely(headlen < hdrlen)) 183 return -EINVAL; 184 185 skb_put_data(skb, hdr, hdrlen); 186 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen); 187 188 /* 189 * If we did CHECKSUM_COMPLETE, the hardware only does it right for 190 * certain cases and starts the checksum after the SNAP. Check if 191 * this is the case - it's easier to just bail out to CHECKSUM_NONE 192 * in the cases the hardware didn't handle, since it's rare to see 193 * such packets, even though the hardware did calculate the checksum 194 * in this case, just starting after the MAC header instead. 195 * 196 * Starting from Bz hardware, it calculates starting directly after 197 * the MAC header, so that matches mac80211's expectation. 198 */ 199 if (skb->ip_summed == CHECKSUM_COMPLETE && 200 mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ) { 201 struct { 202 u8 hdr[6]; 203 __be16 type; 204 } __packed *shdr = (void *)((u8 *)hdr + hdrlen + pad_len); 205 206 if (unlikely(headlen - hdrlen < sizeof(*shdr) || 207 !ether_addr_equal(shdr->hdr, rfc1042_header) || 208 (shdr->type != htons(ETH_P_IP) && 209 shdr->type != htons(ETH_P_ARP) && 210 shdr->type != htons(ETH_P_IPV6) && 211 shdr->type != htons(ETH_P_8021Q) && 212 shdr->type != htons(ETH_P_PAE) && 213 shdr->type != htons(ETH_P_TDLS)))) 214 skb->ip_summed = CHECKSUM_NONE; 215 else 216 /* mac80211 assumes full CSUM including SNAP header */ 217 skb_postpush_rcsum(skb, shdr, sizeof(*shdr)); 218 } 219 220 fraglen = len - headlen; 221 222 if (fraglen) { 223 int offset = (u8 *)hdr + headlen + pad_len - 224 (u8 *)rxb_addr(rxb) + rxb_offset(rxb); 225 226 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 227 fraglen, rxb->truesize); 228 } 229 230 return 0; 231 } 232 233 static void iwl_mvm_add_rtap_sniffer_config(struct iwl_mvm *mvm, 234 struct sk_buff *skb) 235 { 236 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 237 struct ieee80211_vendor_radiotap *radiotap; 238 const int size = sizeof(*radiotap) + sizeof(__le16); 239 240 if (!mvm->cur_aid) 241 return; 242 243 /* ensure alignment */ 244 BUILD_BUG_ON((size + 2) % 4); 245 246 radiotap = skb_put(skb, size + 2); 247 radiotap->align = 1; 248 /* Intel OUI */ 249 radiotap->oui[0] = 0xf6; 250 radiotap->oui[1] = 0x54; 251 radiotap->oui[2] = 0x25; 252 /* radiotap sniffer config sub-namespace */ 253 radiotap->subns = 1; 254 radiotap->present = 0x1; 255 radiotap->len = size - sizeof(*radiotap); 256 radiotap->pad = 2; 257 258 /* fill the data now */ 259 memcpy(radiotap->data, &mvm->cur_aid, sizeof(mvm->cur_aid)); 260 /* and clear the padding */ 261 memset(radiotap->data + sizeof(__le16), 0, radiotap->pad); 262 263 rx_status->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA; 264 } 265 266 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ 267 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 268 struct napi_struct *napi, 269 struct sk_buff *skb, int queue, 270 struct ieee80211_sta *sta) 271 { 272 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) 273 kfree_skb(skb); 274 else 275 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 276 } 277 278 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 279 struct ieee80211_rx_status *rx_status, 280 u32 rate_n_flags, int energy_a, 281 int energy_b) 282 { 283 int max_energy; 284 u32 rate_flags = rate_n_flags; 285 286 energy_a = energy_a ? -energy_a : S8_MIN; 287 energy_b = energy_b ? -energy_b : S8_MIN; 288 max_energy = max(energy_a, energy_b); 289 290 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", 291 energy_a, energy_b, max_energy); 292 293 rx_status->signal = max_energy; 294 rx_status->chains = 295 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 296 rx_status->chain_signal[0] = energy_a; 297 rx_status->chain_signal[1] = energy_b; 298 } 299 300 static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta, 301 struct ieee80211_hdr *hdr, 302 struct iwl_rx_mpdu_desc *desc, 303 u32 status) 304 { 305 struct iwl_mvm_sta *mvmsta; 306 struct iwl_mvm_vif *mvmvif; 307 u8 keyid; 308 struct ieee80211_key_conf *key; 309 u32 len = le16_to_cpu(desc->mpdu_len); 310 const u8 *frame = (void *)hdr; 311 312 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == IWL_RX_MPDU_STATUS_SEC_NONE) 313 return 0; 314 315 /* 316 * For non-beacon, we don't really care. But beacons may 317 * be filtered out, and we thus need the firmware's replay 318 * detection, otherwise beacons the firmware previously 319 * filtered could be replayed, or something like that, and 320 * it can filter a lot - though usually only if nothing has 321 * changed. 322 */ 323 if (!ieee80211_is_beacon(hdr->frame_control)) 324 return 0; 325 326 /* key mismatch - will also report !MIC_OK but we shouldn't count it */ 327 if (!(status & IWL_RX_MPDU_STATUS_KEY_VALID)) 328 return -1; 329 330 /* good cases */ 331 if (likely(status & IWL_RX_MPDU_STATUS_MIC_OK && 332 !(status & IWL_RX_MPDU_STATUS_REPLAY_ERROR))) 333 return 0; 334 335 if (!sta) 336 return -1; 337 338 mvmsta = iwl_mvm_sta_from_mac80211(sta); 339 340 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 341 342 /* 343 * both keys will have the same cipher and MIC length, use 344 * whichever one is available 345 */ 346 key = rcu_dereference(mvmvif->bcn_prot.keys[0]); 347 if (!key) { 348 key = rcu_dereference(mvmvif->bcn_prot.keys[1]); 349 if (!key) 350 return -1; 351 } 352 353 if (len < key->icv_len + IEEE80211_GMAC_PN_LEN + 2) 354 return -1; 355 356 /* get the real key ID */ 357 keyid = frame[len - key->icv_len - IEEE80211_GMAC_PN_LEN - 2]; 358 /* and if that's the other key, look it up */ 359 if (keyid != key->keyidx) { 360 /* 361 * shouldn't happen since firmware checked, but be safe 362 * in case the MIC length is wrong too, for example 363 */ 364 if (keyid != 6 && keyid != 7) 365 return -1; 366 key = rcu_dereference(mvmvif->bcn_prot.keys[keyid - 6]); 367 if (!key) 368 return -1; 369 } 370 371 /* Report status to mac80211 */ 372 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 373 ieee80211_key_mic_failure(key); 374 else if (status & IWL_RX_MPDU_STATUS_REPLAY_ERROR) 375 ieee80211_key_replay(key); 376 377 return -1; 378 } 379 380 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 381 struct ieee80211_hdr *hdr, 382 struct ieee80211_rx_status *stats, u16 phy_info, 383 struct iwl_rx_mpdu_desc *desc, 384 u32 pkt_flags, int queue, u8 *crypt_len) 385 { 386 u32 status = le32_to_cpu(desc->status); 387 388 /* 389 * Drop UNKNOWN frames in aggregation, unless in monitor mode 390 * (where we don't have the keys). 391 * We limit this to aggregation because in TKIP this is a valid 392 * scenario, since we may not have the (correct) TTAK (phase 1 393 * key) in the firmware. 394 */ 395 if (phy_info & IWL_RX_MPDU_PHY_AMPDU && 396 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 397 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on) 398 return -1; 399 400 if (unlikely(ieee80211_is_mgmt(hdr->frame_control) && 401 !ieee80211_has_protected(hdr->frame_control))) 402 return iwl_mvm_rx_mgmt_prot(sta, hdr, desc, status); 403 404 if (!ieee80211_has_protected(hdr->frame_control) || 405 (status & IWL_RX_MPDU_STATUS_SEC_MASK) == 406 IWL_RX_MPDU_STATUS_SEC_NONE) 407 return 0; 408 409 /* TODO: handle packets encrypted with unknown alg */ 410 #if defined(__FreeBSD__) 411 /* XXX-BZ do similar to rx.c for now as these are plenty. */ 412 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 413 IWL_RX_MPDU_STATUS_SEC_ENC_ERR) 414 return (0); 415 #endif 416 417 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { 418 case IWL_RX_MPDU_STATUS_SEC_CCM: 419 case IWL_RX_MPDU_STATUS_SEC_GCM: 420 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); 421 /* alg is CCM: check MIC only */ 422 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 423 return -1; 424 425 stats->flag |= RX_FLAG_DECRYPTED; 426 if (pkt_flags & FH_RSCSR_RADA_EN) 427 stats->flag |= RX_FLAG_MIC_STRIPPED; 428 *crypt_len = IEEE80211_CCMP_HDR_LEN; 429 return 0; 430 case IWL_RX_MPDU_STATUS_SEC_TKIP: 431 /* Don't drop the frame and decrypt it in SW */ 432 if (!fw_has_api(&mvm->fw->ucode_capa, 433 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 434 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) 435 return 0; 436 437 if (mvm->trans->trans_cfg->gen2 && 438 !(status & RX_MPDU_RES_STATUS_MIC_OK)) 439 stats->flag |= RX_FLAG_MMIC_ERROR; 440 441 *crypt_len = IEEE80211_TKIP_IV_LEN; 442 fallthrough; 443 case IWL_RX_MPDU_STATUS_SEC_WEP: 444 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) 445 return -1; 446 447 stats->flag |= RX_FLAG_DECRYPTED; 448 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == 449 IWL_RX_MPDU_STATUS_SEC_WEP) 450 *crypt_len = IEEE80211_WEP_IV_LEN; 451 452 if (pkt_flags & FH_RSCSR_RADA_EN) { 453 stats->flag |= RX_FLAG_ICV_STRIPPED; 454 if (mvm->trans->trans_cfg->gen2) 455 stats->flag |= RX_FLAG_MMIC_STRIPPED; 456 } 457 458 return 0; 459 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: 460 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) 461 return -1; 462 stats->flag |= RX_FLAG_DECRYPTED; 463 return 0; 464 case RX_MPDU_RES_STATUS_SEC_CMAC_GMAC_ENC: 465 break; 466 default: 467 /* 468 * Sometimes we can get frames that were not decrypted 469 * because the firmware didn't have the keys yet. This can 470 * happen after connection where we can get multicast frames 471 * before the GTK is installed. 472 * Silently drop those frames. 473 * Also drop un-decrypted frames in monitor mode. 474 */ 475 if (!is_multicast_ether_addr(hdr->addr1) && 476 !mvm->monitor_on && net_ratelimit()) 477 #if defined(__linux__) 478 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); 479 #elif defined(__FreeBSD__) 480 IWL_ERR(mvm, "%s: Unhandled alg: 0x%x\n", 481 __func__, status); 482 #endif 483 } 484 485 return 0; 486 } 487 488 static void iwl_mvm_rx_csum(struct iwl_mvm *mvm, 489 struct ieee80211_sta *sta, 490 struct sk_buff *skb, 491 struct iwl_rx_packet *pkt) 492 { 493 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 494 495 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 496 if (pkt->len_n_flags & cpu_to_le32(FH_RSCSR_RPA_EN)) { 497 u16 hwsum = be16_to_cpu(desc->v3.raw_xsum); 498 499 skb->ip_summed = CHECKSUM_COMPLETE; 500 skb->csum = csum_unfold(~(__force __sum16)hwsum); 501 } 502 } else { 503 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 504 struct iwl_mvm_vif *mvmvif; 505 u16 flags = le16_to_cpu(desc->l3l4_flags); 506 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> 507 IWL_RX_L3_PROTO_POS); 508 509 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 510 511 if (mvmvif->features & NETIF_F_RXCSUM && 512 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && 513 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || 514 l3_prot == IWL_RX_L3_TYPE_IPV6 || 515 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) 516 skb->ip_summed = CHECKSUM_UNNECESSARY; 517 } 518 } 519 520 /* 521 * returns true if a packet is a duplicate and should be dropped. 522 * Updates AMSDU PN tracking info 523 */ 524 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, 525 struct ieee80211_rx_status *rx_status, 526 struct ieee80211_hdr *hdr, 527 struct iwl_rx_mpdu_desc *desc) 528 { 529 struct iwl_mvm_sta *mvm_sta; 530 struct iwl_mvm_rxq_dup_data *dup_data; 531 u8 tid, sub_frame_idx; 532 533 if (WARN_ON(IS_ERR_OR_NULL(sta))) 534 return false; 535 536 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 537 #if defined(__FreeBSD__) 538 if (WARN_ON(mvm_sta->dup_data == NULL)) 539 return false; 540 #endif 541 dup_data = &mvm_sta->dup_data[queue]; 542 543 /* 544 * Drop duplicate 802.11 retransmissions 545 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") 546 */ 547 if (ieee80211_is_ctl(hdr->frame_control) || 548 ieee80211_is_qos_nullfunc(hdr->frame_control) || 549 is_multicast_ether_addr(hdr->addr1)) { 550 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 551 return false; 552 } 553 554 if (ieee80211_is_data_qos(hdr->frame_control)) 555 /* frame has qos control */ 556 tid = ieee80211_get_tid(hdr); 557 else 558 tid = IWL_MAX_TID_COUNT; 559 560 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ 561 sub_frame_idx = desc->amsdu_info & 562 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 563 564 if (unlikely(ieee80211_has_retry(hdr->frame_control) && 565 dup_data->last_seq[tid] == hdr->seq_ctrl && 566 dup_data->last_sub_frame[tid] >= sub_frame_idx)) 567 return true; 568 569 /* Allow same PN as the first subframe for following sub frames */ 570 if (dup_data->last_seq[tid] == hdr->seq_ctrl && 571 sub_frame_idx > dup_data->last_sub_frame[tid] && 572 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) 573 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; 574 575 dup_data->last_seq[tid] = hdr->seq_ctrl; 576 dup_data->last_sub_frame[tid] = sub_frame_idx; 577 578 rx_status->flag |= RX_FLAG_DUP_VALIDATED; 579 580 return false; 581 } 582 583 /* 584 * Returns true if sn2 - buffer_size < sn1 < sn2. 585 * To be used only in order to compare reorder buffer head with NSSN. 586 * We fully trust NSSN unless it is behind us due to reorder timeout. 587 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN. 588 */ 589 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size) 590 { 591 return ieee80211_sn_less(sn1, sn2) && 592 !ieee80211_sn_less(sn1, sn2 - buffer_size); 593 } 594 595 static void iwl_mvm_sync_nssn(struct iwl_mvm *mvm, u8 baid, u16 nssn) 596 { 597 if (IWL_MVM_USE_NSSN_SYNC) { 598 struct iwl_mvm_nssn_sync_data notif = { 599 .baid = baid, 600 .nssn = nssn, 601 }; 602 603 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NSSN_SYNC, false, 604 ¬if, sizeof(notif)); 605 } 606 } 607 608 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10) 609 610 enum iwl_mvm_release_flags { 611 IWL_MVM_RELEASE_SEND_RSS_SYNC = BIT(0), 612 IWL_MVM_RELEASE_FROM_RSS_SYNC = BIT(1), 613 }; 614 615 static void iwl_mvm_release_frames(struct iwl_mvm *mvm, 616 struct ieee80211_sta *sta, 617 struct napi_struct *napi, 618 struct iwl_mvm_baid_data *baid_data, 619 struct iwl_mvm_reorder_buffer *reorder_buf, 620 u16 nssn, u32 flags) 621 { 622 struct iwl_mvm_reorder_buf_entry *entries = 623 &baid_data->entries[reorder_buf->queue * 624 baid_data->entries_per_queue]; 625 u16 ssn = reorder_buf->head_sn; 626 627 lockdep_assert_held(&reorder_buf->lock); 628 629 /* 630 * We keep the NSSN not too far behind, if we are sync'ing it and it 631 * is more than 2048 ahead of us, it must be behind us. Discard it. 632 * This can happen if the queue that hit the 0 / 2048 seqno was lagging 633 * behind and this queue already processed packets. The next if 634 * would have caught cases where this queue would have processed less 635 * than 64 packets, but it may have processed more than 64 packets. 636 */ 637 if ((flags & IWL_MVM_RELEASE_FROM_RSS_SYNC) && 638 ieee80211_sn_less(nssn, ssn)) 639 goto set_timer; 640 641 /* ignore nssn smaller than head sn - this can happen due to timeout */ 642 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size)) 643 goto set_timer; 644 645 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) { 646 int index = ssn % reorder_buf->buf_size; 647 struct sk_buff_head *skb_list = &entries[index].e.frames; 648 struct sk_buff *skb; 649 650 ssn = ieee80211_sn_inc(ssn); 651 if ((flags & IWL_MVM_RELEASE_SEND_RSS_SYNC) && 652 (ssn == 2048 || ssn == 0)) 653 iwl_mvm_sync_nssn(mvm, baid_data->baid, ssn); 654 655 /* 656 * Empty the list. Will have more than one frame for A-MSDU. 657 * Empty list is valid as well since nssn indicates frames were 658 * received. 659 */ 660 while ((skb = __skb_dequeue(skb_list))) { 661 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, 662 reorder_buf->queue, 663 sta); 664 reorder_buf->num_stored--; 665 } 666 } 667 reorder_buf->head_sn = nssn; 668 669 set_timer: 670 if (reorder_buf->num_stored && !reorder_buf->removed) { 671 u16 index = reorder_buf->head_sn % reorder_buf->buf_size; 672 673 while (skb_queue_empty(&entries[index].e.frames)) 674 index = (index + 1) % reorder_buf->buf_size; 675 /* modify timer to match next frame's expiration time */ 676 mod_timer(&reorder_buf->reorder_timer, 677 entries[index].e.reorder_time + 1 + 678 RX_REORDER_BUF_TIMEOUT_MQ); 679 } else { 680 del_timer(&reorder_buf->reorder_timer); 681 } 682 } 683 684 void iwl_mvm_reorder_timer_expired(struct timer_list *t) 685 { 686 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer); 687 struct iwl_mvm_baid_data *baid_data = 688 iwl_mvm_baid_data_from_reorder_buf(buf); 689 struct iwl_mvm_reorder_buf_entry *entries = 690 &baid_data->entries[buf->queue * baid_data->entries_per_queue]; 691 int i; 692 u16 sn = 0, index = 0; 693 bool expired = false; 694 bool cont = false; 695 696 spin_lock(&buf->lock); 697 698 if (!buf->num_stored || buf->removed) { 699 spin_unlock(&buf->lock); 700 return; 701 } 702 703 for (i = 0; i < buf->buf_size ; i++) { 704 index = (buf->head_sn + i) % buf->buf_size; 705 706 if (skb_queue_empty(&entries[index].e.frames)) { 707 /* 708 * If there is a hole and the next frame didn't expire 709 * we want to break and not advance SN 710 */ 711 cont = false; 712 continue; 713 } 714 if (!cont && 715 !time_after(jiffies, entries[index].e.reorder_time + 716 RX_REORDER_BUF_TIMEOUT_MQ)) 717 break; 718 719 expired = true; 720 /* continue until next hole after this expired frames */ 721 cont = true; 722 sn = ieee80211_sn_add(buf->head_sn, i + 1); 723 } 724 725 if (expired) { 726 struct ieee80211_sta *sta; 727 struct iwl_mvm_sta *mvmsta; 728 u8 sta_id = baid_data->sta_id; 729 730 rcu_read_lock(); 731 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]); 732 mvmsta = iwl_mvm_sta_from_mac80211(sta); 733 734 /* SN is set to the last expired frame + 1 */ 735 IWL_DEBUG_HT(buf->mvm, 736 "Releasing expired frames for sta %u, sn %d\n", 737 sta_id, sn); 738 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif, 739 sta, baid_data->tid); 740 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, 741 buf, sn, IWL_MVM_RELEASE_SEND_RSS_SYNC); 742 rcu_read_unlock(); 743 } else { 744 /* 745 * If no frame expired and there are stored frames, index is now 746 * pointing to the first unexpired frame - modify timer 747 * accordingly to this frame. 748 */ 749 mod_timer(&buf->reorder_timer, 750 entries[index].e.reorder_time + 751 1 + RX_REORDER_BUF_TIMEOUT_MQ); 752 } 753 spin_unlock(&buf->lock); 754 } 755 756 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue, 757 struct iwl_mvm_delba_data *data) 758 { 759 struct iwl_mvm_baid_data *ba_data; 760 struct ieee80211_sta *sta; 761 struct iwl_mvm_reorder_buffer *reorder_buf; 762 u8 baid = data->baid; 763 764 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid)) 765 return; 766 767 rcu_read_lock(); 768 769 ba_data = rcu_dereference(mvm->baid_map[baid]); 770 if (WARN_ON_ONCE(!ba_data)) 771 goto out; 772 773 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 774 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 775 goto out; 776 777 reorder_buf = &ba_data->reorder_buf[queue]; 778 779 /* release all frames that are in the reorder buffer to the stack */ 780 spin_lock_bh(&reorder_buf->lock); 781 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf, 782 ieee80211_sn_add(reorder_buf->head_sn, 783 reorder_buf->buf_size), 784 0); 785 spin_unlock_bh(&reorder_buf->lock); 786 del_timer_sync(&reorder_buf->reorder_timer); 787 788 out: 789 rcu_read_unlock(); 790 } 791 792 static void iwl_mvm_release_frames_from_notif(struct iwl_mvm *mvm, 793 struct napi_struct *napi, 794 u8 baid, u16 nssn, int queue, 795 u32 flags) 796 { 797 struct ieee80211_sta *sta; 798 struct iwl_mvm_reorder_buffer *reorder_buf; 799 struct iwl_mvm_baid_data *ba_data; 800 801 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n", 802 baid, nssn); 803 804 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID || 805 baid >= ARRAY_SIZE(mvm->baid_map))) 806 return; 807 808 rcu_read_lock(); 809 810 ba_data = rcu_dereference(mvm->baid_map[baid]); 811 if (!ba_data) { 812 WARN(!(flags & IWL_MVM_RELEASE_FROM_RSS_SYNC), 813 "BAID %d not found in map\n", baid); 814 goto out; 815 } 816 817 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]); 818 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) 819 goto out; 820 821 reorder_buf = &ba_data->reorder_buf[queue]; 822 823 spin_lock_bh(&reorder_buf->lock); 824 iwl_mvm_release_frames(mvm, sta, napi, ba_data, 825 reorder_buf, nssn, flags); 826 spin_unlock_bh(&reorder_buf->lock); 827 828 out: 829 rcu_read_unlock(); 830 } 831 832 static void iwl_mvm_nssn_sync(struct iwl_mvm *mvm, 833 struct napi_struct *napi, int queue, 834 const struct iwl_mvm_nssn_sync_data *data) 835 { 836 iwl_mvm_release_frames_from_notif(mvm, napi, data->baid, 837 data->nssn, queue, 838 IWL_MVM_RELEASE_FROM_RSS_SYNC); 839 } 840 841 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct napi_struct *napi, 842 struct iwl_rx_cmd_buffer *rxb, int queue) 843 { 844 struct iwl_rx_packet *pkt = rxb_addr(rxb); 845 struct iwl_rxq_sync_notification *notif; 846 struct iwl_mvm_internal_rxq_notif *internal_notif; 847 u32 len = iwl_rx_packet_payload_len(pkt); 848 849 notif = (void *)pkt->data; 850 internal_notif = (void *)notif->payload; 851 852 if (WARN_ONCE(len < sizeof(*notif) + sizeof(*internal_notif), 853 "invalid notification size %d (%d)", 854 len, (int)(sizeof(*notif) + sizeof(*internal_notif)))) 855 return; 856 len -= sizeof(*notif) + sizeof(*internal_notif); 857 858 if (internal_notif->sync && 859 mvm->queue_sync_cookie != internal_notif->cookie) { 860 WARN_ONCE(1, "Received expired RX queue sync message\n"); 861 return; 862 } 863 864 switch (internal_notif->type) { 865 case IWL_MVM_RXQ_EMPTY: 866 WARN_ONCE(len, "invalid empty notification size %d", len); 867 break; 868 case IWL_MVM_RXQ_NOTIF_DEL_BA: 869 if (WARN_ONCE(len != sizeof(struct iwl_mvm_delba_data), 870 "invalid delba notification size %d (%d)", 871 len, (int)sizeof(struct iwl_mvm_delba_data))) 872 break; 873 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data); 874 break; 875 case IWL_MVM_RXQ_NSSN_SYNC: 876 if (WARN_ONCE(len != sizeof(struct iwl_mvm_nssn_sync_data), 877 "invalid nssn sync notification size %d (%d)", 878 len, (int)sizeof(struct iwl_mvm_nssn_sync_data))) 879 break; 880 iwl_mvm_nssn_sync(mvm, napi, queue, 881 (void *)internal_notif->data); 882 break; 883 default: 884 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); 885 } 886 887 if (internal_notif->sync) { 888 WARN_ONCE(!test_and_clear_bit(queue, &mvm->queue_sync_state), 889 "queue sync: queue %d responded a second time!\n", 890 queue); 891 if (READ_ONCE(mvm->queue_sync_state) == 0) 892 wake_up(&mvm->rx_sync_waitq); 893 } 894 } 895 896 static void iwl_mvm_oldsn_workaround(struct iwl_mvm *mvm, 897 struct ieee80211_sta *sta, int tid, 898 struct iwl_mvm_reorder_buffer *buffer, 899 u32 reorder, u32 gp2, int queue) 900 { 901 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 902 903 if (gp2 != buffer->consec_oldsn_ampdu_gp2) { 904 /* we have a new (A-)MPDU ... */ 905 906 /* 907 * reset counter to 0 if we didn't have any oldsn in 908 * the last A-MPDU (as detected by GP2 being identical) 909 */ 910 if (!buffer->consec_oldsn_prev_drop) 911 buffer->consec_oldsn_drops = 0; 912 913 /* either way, update our tracking state */ 914 buffer->consec_oldsn_ampdu_gp2 = gp2; 915 } else if (buffer->consec_oldsn_prev_drop) { 916 /* 917 * tracking state didn't change, and we had an old SN 918 * indication before - do nothing in this case, we 919 * already noted this one down and are waiting for the 920 * next A-MPDU (by GP2) 921 */ 922 return; 923 } 924 925 /* return unless this MPDU has old SN */ 926 if (!(reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN)) 927 return; 928 929 /* update state */ 930 buffer->consec_oldsn_prev_drop = 1; 931 buffer->consec_oldsn_drops++; 932 933 /* if limit is reached, send del BA and reset state */ 934 if (buffer->consec_oldsn_drops == IWL_MVM_AMPDU_CONSEC_DROPS_DELBA) { 935 IWL_WARN(mvm, 936 "reached %d old SN frames from %pM on queue %d, stopping BA session on TID %d\n", 937 IWL_MVM_AMPDU_CONSEC_DROPS_DELBA, 938 sta->addr, queue, tid); 939 ieee80211_stop_rx_ba_session(mvmsta->vif, BIT(tid), sta->addr); 940 buffer->consec_oldsn_prev_drop = 0; 941 buffer->consec_oldsn_drops = 0; 942 } 943 } 944 945 /* 946 * Returns true if the MPDU was buffered\dropped, false if it should be passed 947 * to upper layer. 948 */ 949 static bool iwl_mvm_reorder(struct iwl_mvm *mvm, 950 struct napi_struct *napi, 951 int queue, 952 struct ieee80211_sta *sta, 953 struct sk_buff *skb, 954 struct iwl_rx_mpdu_desc *desc) 955 { 956 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 957 struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb); 958 struct iwl_mvm_sta *mvm_sta; 959 struct iwl_mvm_baid_data *baid_data; 960 struct iwl_mvm_reorder_buffer *buffer; 961 struct sk_buff *tail; 962 u32 reorder = le32_to_cpu(desc->reorder_data); 963 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU; 964 bool last_subframe = 965 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME; 966 #if defined(__linux__) 967 u8 tid = ieee80211_get_tid(hdr); 968 #elif defined(__FreeBSD__) 969 u8 tid; 970 #endif 971 u8 sub_frame_idx = desc->amsdu_info & 972 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 973 struct iwl_mvm_reorder_buf_entry *entries; 974 int index; 975 u16 nssn, sn; 976 u8 baid; 977 978 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 979 IWL_RX_MPDU_REORDER_BAID_SHIFT; 980 981 /* 982 * This also covers the case of receiving a Block Ack Request 983 * outside a BA session; we'll pass it to mac80211 and that 984 * then sends a delBA action frame. 985 * This also covers pure monitor mode, in which case we won't 986 * have any BA sessions. 987 */ 988 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 989 return false; 990 991 /* no sta yet */ 992 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 993 "Got valid BAID without a valid station assigned\n")) 994 return false; 995 996 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 997 998 /* not a data packet or a bar */ 999 if (!ieee80211_is_back_req(hdr->frame_control) && 1000 (!ieee80211_is_data_qos(hdr->frame_control) || 1001 is_multicast_ether_addr(hdr->addr1))) 1002 return false; 1003 1004 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 1005 return false; 1006 1007 baid_data = rcu_dereference(mvm->baid_map[baid]); 1008 if (!baid_data) { 1009 IWL_DEBUG_RX(mvm, 1010 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 1011 baid, reorder); 1012 return false; 1013 } 1014 1015 #if defined(__FreeBSD__) 1016 tid = ieee80211_get_tid(hdr); 1017 #endif 1018 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 1019 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 1020 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 1021 tid)) 1022 return false; 1023 1024 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 1025 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 1026 IWL_RX_MPDU_REORDER_SN_SHIFT; 1027 1028 buffer = &baid_data->reorder_buf[queue]; 1029 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 1030 1031 spin_lock_bh(&buffer->lock); 1032 1033 if (!buffer->valid) { 1034 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 1035 spin_unlock_bh(&buffer->lock); 1036 return false; 1037 } 1038 buffer->valid = true; 1039 } 1040 1041 if (ieee80211_is_back_req(hdr->frame_control)) { 1042 iwl_mvm_release_frames(mvm, sta, napi, baid_data, 1043 buffer, nssn, 0); 1044 goto drop; 1045 } 1046 1047 /* 1048 * If there was a significant jump in the nssn - adjust. 1049 * If the SN is smaller than the NSSN it might need to first go into 1050 * the reorder buffer, in which case we just release up to it and the 1051 * rest of the function will take care of storing it and releasing up to 1052 * the nssn. 1053 * This should not happen. This queue has been lagging and it should 1054 * have been updated by a IWL_MVM_RXQ_NSSN_SYNC notification. Be nice 1055 * and update the other queues. 1056 */ 1057 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 1058 buffer->buf_size) || 1059 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 1060 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 1061 1062 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 1063 min_sn, IWL_MVM_RELEASE_SEND_RSS_SYNC); 1064 } 1065 1066 iwl_mvm_oldsn_workaround(mvm, sta, tid, buffer, reorder, 1067 rx_status->device_timestamp, queue); 1068 1069 /* drop any oudated packets */ 1070 if (ieee80211_sn_less(sn, buffer->head_sn)) 1071 goto drop; 1072 1073 /* release immediately if allowed by nssn and no stored frames */ 1074 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 1075 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 1076 buffer->buf_size) && 1077 (!amsdu || last_subframe)) { 1078 /* 1079 * If we crossed the 2048 or 0 SN, notify all the 1080 * queues. This is done in order to avoid having a 1081 * head_sn that lags behind for too long. When that 1082 * happens, we can get to a situation where the head_sn 1083 * is within the interval [nssn - buf_size : nssn] 1084 * which will make us think that the nssn is a packet 1085 * that we already freed because of the reordering 1086 * buffer and we will ignore it. So maintain the 1087 * head_sn somewhat updated across all the queues: 1088 * when it crosses 0 and 2048. 1089 */ 1090 if (sn == 2048 || sn == 0) 1091 iwl_mvm_sync_nssn(mvm, baid, sn); 1092 buffer->head_sn = nssn; 1093 } 1094 /* No need to update AMSDU last SN - we are moving the head */ 1095 spin_unlock_bh(&buffer->lock); 1096 return false; 1097 } 1098 1099 /* 1100 * release immediately if there are no stored frames, and the sn is 1101 * equal to the head. 1102 * This can happen due to reorder timer, where NSSN is behind head_sn. 1103 * When we released everything, and we got the next frame in the 1104 * sequence, according to the NSSN we can't release immediately, 1105 * while technically there is no hole and we can move forward. 1106 */ 1107 if (!buffer->num_stored && sn == buffer->head_sn) { 1108 if (!amsdu || last_subframe) { 1109 if (sn == 2048 || sn == 0) 1110 iwl_mvm_sync_nssn(mvm, baid, sn); 1111 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 1112 } 1113 /* No need to update AMSDU last SN - we are moving the head */ 1114 spin_unlock_bh(&buffer->lock); 1115 return false; 1116 } 1117 1118 index = sn % buffer->buf_size; 1119 1120 /* 1121 * Check if we already stored this frame 1122 * As AMSDU is either received or not as whole, logic is simple: 1123 * If we have frames in that position in the buffer and the last frame 1124 * originated from AMSDU had a different SN then it is a retransmission. 1125 * If it is the same SN then if the subframe index is incrementing it 1126 * is the same AMSDU - otherwise it is a retransmission. 1127 */ 1128 tail = skb_peek_tail(&entries[index].e.frames); 1129 if (tail && !amsdu) 1130 goto drop; 1131 else if (tail && (sn != buffer->last_amsdu || 1132 buffer->last_sub_index >= sub_frame_idx)) 1133 goto drop; 1134 1135 /* put in reorder buffer */ 1136 __skb_queue_tail(&entries[index].e.frames, skb); 1137 buffer->num_stored++; 1138 entries[index].e.reorder_time = jiffies; 1139 1140 if (amsdu) { 1141 buffer->last_amsdu = sn; 1142 buffer->last_sub_index = sub_frame_idx; 1143 } 1144 1145 /* 1146 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 1147 * The reason is that NSSN advances on the first sub-frame, and may 1148 * cause the reorder buffer to advance before all the sub-frames arrive. 1149 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 1150 * SN 1. NSSN for first sub frame will be 3 with the result of driver 1151 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 1152 * already ahead and it will be dropped. 1153 * If the last sub-frame is not on this queue - we will get frame 1154 * release notification with up to date NSSN. 1155 */ 1156 if (!amsdu || last_subframe) 1157 iwl_mvm_release_frames(mvm, sta, napi, baid_data, 1158 buffer, nssn, 1159 IWL_MVM_RELEASE_SEND_RSS_SYNC); 1160 1161 spin_unlock_bh(&buffer->lock); 1162 return true; 1163 1164 drop: 1165 kfree_skb(skb); 1166 spin_unlock_bh(&buffer->lock); 1167 return true; 1168 } 1169 1170 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 1171 u32 reorder_data, u8 baid) 1172 { 1173 unsigned long now = jiffies; 1174 unsigned long timeout; 1175 struct iwl_mvm_baid_data *data; 1176 1177 rcu_read_lock(); 1178 1179 data = rcu_dereference(mvm->baid_map[baid]); 1180 if (!data) { 1181 IWL_DEBUG_RX(mvm, 1182 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 1183 baid, reorder_data); 1184 goto out; 1185 } 1186 1187 if (!data->timeout) 1188 goto out; 1189 1190 timeout = data->timeout; 1191 /* 1192 * Do not update last rx all the time to avoid cache bouncing 1193 * between the rx queues. 1194 * Update it every timeout. Worst case is the session will 1195 * expire after ~ 2 * timeout, which doesn't matter that much. 1196 */ 1197 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 1198 /* Update is atomic */ 1199 data->last_rx = now; 1200 1201 out: 1202 rcu_read_unlock(); 1203 } 1204 1205 static void iwl_mvm_flip_address(u8 *addr) 1206 { 1207 int i; 1208 u8 mac_addr[ETH_ALEN]; 1209 1210 for (i = 0; i < ETH_ALEN; i++) 1211 mac_addr[i] = addr[ETH_ALEN - i - 1]; 1212 ether_addr_copy(addr, mac_addr); 1213 } 1214 1215 struct iwl_mvm_rx_phy_data { 1216 enum iwl_rx_phy_info_type info_type; 1217 __le32 d0, d1, d2, d3; 1218 __le16 d4; 1219 }; 1220 1221 static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm, 1222 struct iwl_mvm_rx_phy_data *phy_data, 1223 u32 rate_n_flags, 1224 struct ieee80211_radiotap_he_mu *he_mu) 1225 { 1226 u32 phy_data2 = le32_to_cpu(phy_data->d2); 1227 u32 phy_data3 = le32_to_cpu(phy_data->d3); 1228 u16 phy_data4 = le16_to_cpu(phy_data->d4); 1229 1230 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) { 1231 he_mu->flags1 |= 1232 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN | 1233 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN); 1234 1235 he_mu->flags1 |= 1236 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU, 1237 phy_data4), 1238 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU); 1239 1240 he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0, 1241 phy_data2); 1242 he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1, 1243 phy_data3); 1244 he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2, 1245 phy_data2); 1246 he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3, 1247 phy_data3); 1248 } 1249 1250 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) && 1251 (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) != RATE_MCS_CHAN_WIDTH_20) { 1252 he_mu->flags1 |= 1253 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN | 1254 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN); 1255 1256 he_mu->flags2 |= 1257 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU, 1258 phy_data4), 1259 IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU); 1260 1261 he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0, 1262 phy_data2); 1263 he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1, 1264 phy_data3); 1265 he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2, 1266 phy_data2); 1267 he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3, 1268 phy_data3); 1269 } 1270 } 1271 1272 static void 1273 iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data, 1274 u32 rate_n_flags, 1275 struct ieee80211_radiotap_he *he, 1276 struct ieee80211_radiotap_he_mu *he_mu, 1277 struct ieee80211_rx_status *rx_status) 1278 { 1279 /* 1280 * Unfortunately, we have to leave the mac80211 data 1281 * incorrect for the case that we receive an HE-MU 1282 * transmission and *don't* have the HE phy data (due 1283 * to the bits being used for TSF). This shouldn't 1284 * happen though as management frames where we need 1285 * the TSF/timers are not be transmitted in HE-MU. 1286 */ 1287 u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK); 1288 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK_V1; 1289 u8 offs = 0; 1290 1291 rx_status->bw = RATE_INFO_BW_HE_RU; 1292 1293 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1294 1295 switch (ru) { 1296 case 0 ... 36: 1297 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26; 1298 offs = ru; 1299 break; 1300 case 37 ... 52: 1301 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52; 1302 offs = ru - 37; 1303 break; 1304 case 53 ... 60: 1305 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1306 offs = ru - 53; 1307 break; 1308 case 61 ... 64: 1309 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242; 1310 offs = ru - 61; 1311 break; 1312 case 65 ... 66: 1313 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484; 1314 offs = ru - 65; 1315 break; 1316 case 67: 1317 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996; 1318 break; 1319 case 68: 1320 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; 1321 break; 1322 } 1323 he->data2 |= le16_encode_bits(offs, 1324 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); 1325 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN | 1326 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN); 1327 if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80)) 1328 he->data2 |= 1329 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); 1330 1331 #define CHECK_BW(bw) \ 1332 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \ 1333 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS); \ 1334 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_ ## bw ## MHZ != \ 1335 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS) 1336 CHECK_BW(20); 1337 CHECK_BW(40); 1338 CHECK_BW(80); 1339 CHECK_BW(160); 1340 1341 if (he_mu) 1342 he_mu->flags2 |= 1343 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1, 1344 rate_n_flags), 1345 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW); 1346 else if (he_type == RATE_MCS_HE_TYPE_TRIG_V1) 1347 he->data6 |= 1348 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_KNOWN) | 1349 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1, 1350 rate_n_flags), 1351 IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW); 1352 } 1353 1354 static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm, 1355 struct iwl_mvm_rx_phy_data *phy_data, 1356 struct ieee80211_radiotap_he *he, 1357 struct ieee80211_radiotap_he_mu *he_mu, 1358 struct ieee80211_rx_status *rx_status, 1359 u32 rate_n_flags, int queue) 1360 { 1361 switch (phy_data->info_type) { 1362 case IWL_RX_PHY_INFO_TYPE_NONE: 1363 case IWL_RX_PHY_INFO_TYPE_CCK: 1364 case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY: 1365 case IWL_RX_PHY_INFO_TYPE_HT: 1366 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1367 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1368 return; 1369 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1370 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN | 1371 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN | 1372 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN | 1373 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN); 1374 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1375 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1), 1376 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1); 1377 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1378 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2), 1379 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2); 1380 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1381 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3), 1382 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3); 1383 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1384 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4), 1385 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4); 1386 fallthrough; 1387 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1388 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1389 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1390 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1391 /* HE common */ 1392 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN | 1393 IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN | 1394 IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN); 1395 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN | 1396 IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN | 1397 IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN | 1398 IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1399 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1400 IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK), 1401 IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR); 1402 if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB && 1403 phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) { 1404 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); 1405 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1406 IWL_RX_PHY_DATA0_HE_UPLINK), 1407 IEEE80211_RADIOTAP_HE_DATA3_UL_DL); 1408 } 1409 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1410 IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM), 1411 IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG); 1412 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1413 IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK), 1414 IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD); 1415 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1416 IWL_RX_PHY_DATA0_HE_PE_DISAMBIG), 1417 IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG); 1418 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1, 1419 IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK), 1420 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); 1421 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1422 IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK), 1423 IEEE80211_RADIOTAP_HE_DATA6_TXOP); 1424 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1425 IWL_RX_PHY_DATA0_HE_DOPPLER), 1426 IEEE80211_RADIOTAP_HE_DATA6_DOPPLER); 1427 break; 1428 } 1429 1430 switch (phy_data->info_type) { 1431 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1432 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1433 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1434 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN); 1435 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1436 IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK), 1437 IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE); 1438 break; 1439 default: 1440 /* nothing here */ 1441 break; 1442 } 1443 1444 switch (phy_data->info_type) { 1445 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1446 he_mu->flags1 |= 1447 le16_encode_bits(le16_get_bits(phy_data->d4, 1448 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM), 1449 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); 1450 he_mu->flags1 |= 1451 le16_encode_bits(le16_get_bits(phy_data->d4, 1452 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK), 1453 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); 1454 he_mu->flags2 |= 1455 le16_encode_bits(le16_get_bits(phy_data->d4, 1456 IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK), 1457 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); 1458 iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu); 1459 fallthrough; 1460 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1461 he_mu->flags2 |= 1462 le16_encode_bits(le32_get_bits(phy_data->d1, 1463 IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK), 1464 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); 1465 he_mu->flags2 |= 1466 le16_encode_bits(le32_get_bits(phy_data->d1, 1467 IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION), 1468 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); 1469 fallthrough; 1470 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1471 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1472 iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags, 1473 he, he_mu, rx_status); 1474 break; 1475 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1476 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN); 1477 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1478 IWL_RX_PHY_DATA0_HE_BEAM_CHNG), 1479 IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE); 1480 break; 1481 default: 1482 /* nothing */ 1483 break; 1484 } 1485 } 1486 1487 static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb, 1488 struct iwl_mvm_rx_phy_data *phy_data, 1489 u32 rate_n_flags, u16 phy_info, int queue) 1490 { 1491 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1492 struct ieee80211_radiotap_he *he = NULL; 1493 struct ieee80211_radiotap_he_mu *he_mu = NULL; 1494 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 1495 u8 stbc, ltf; 1496 static const struct ieee80211_radiotap_he known = { 1497 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 1498 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 1499 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | 1500 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), 1501 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | 1502 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), 1503 }; 1504 static const struct ieee80211_radiotap_he_mu mu_known = { 1505 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | 1506 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | 1507 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | 1508 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), 1509 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN | 1510 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN), 1511 }; 1512 1513 he = skb_put_data(skb, &known, sizeof(known)); 1514 rx_status->flag |= RX_FLAG_RADIOTAP_HE; 1515 1516 if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU || 1517 phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) { 1518 he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known)); 1519 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; 1520 } 1521 1522 /* report the AMPDU-EOF bit on single frames */ 1523 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1524 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1525 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1526 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1527 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1528 } 1529 1530 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1531 iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status, 1532 rate_n_flags, queue); 1533 1534 /* update aggregation data for monitor sake on default queue */ 1535 if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) && 1536 (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1537 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1538 1539 /* toggle is switched whenever new aggregation starts */ 1540 if (toggle_bit != mvm->ampdu_toggle) { 1541 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1542 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1543 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1544 } 1545 } 1546 1547 if (he_type == RATE_MCS_HE_TYPE_EXT_SU && 1548 rate_n_flags & RATE_MCS_HE_106T_MSK) { 1549 rx_status->bw = RATE_INFO_BW_HE_RU; 1550 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1551 } 1552 1553 /* actually data is filled in mac80211 */ 1554 if (he_type == RATE_MCS_HE_TYPE_SU || 1555 he_type == RATE_MCS_HE_TYPE_EXT_SU) 1556 he->data1 |= 1557 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1558 1559 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS; 1560 rx_status->nss = 1561 ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1562 RATE_MCS_NSS_POS) + 1; 1563 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 1564 rx_status->encoding = RX_ENC_HE; 1565 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1566 if (rate_n_flags & RATE_MCS_BF_MSK) 1567 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1568 1569 rx_status->he_dcm = 1570 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); 1571 1572 #define CHECK_TYPE(F) \ 1573 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ 1574 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) 1575 1576 CHECK_TYPE(SU); 1577 CHECK_TYPE(EXT_SU); 1578 CHECK_TYPE(MU); 1579 CHECK_TYPE(TRIG); 1580 1581 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); 1582 1583 if (rate_n_flags & RATE_MCS_BF_MSK) 1584 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); 1585 1586 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> 1587 RATE_MCS_HE_GI_LTF_POS) { 1588 case 0: 1589 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1590 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1591 else 1592 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1593 if (he_type == RATE_MCS_HE_TYPE_MU) 1594 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1595 else 1596 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X; 1597 break; 1598 case 1: 1599 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1600 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1601 else 1602 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1603 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1604 break; 1605 case 2: 1606 if (he_type == RATE_MCS_HE_TYPE_TRIG) { 1607 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1608 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1609 } else { 1610 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1611 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1612 } 1613 break; 1614 case 3: 1615 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1616 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1617 break; 1618 case 4: 1619 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1620 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1621 break; 1622 default: 1623 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_UNKNOWN; 1624 } 1625 1626 he->data5 |= le16_encode_bits(ltf, 1627 IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE); 1628 } 1629 1630 static void iwl_mvm_decode_lsig(struct sk_buff *skb, 1631 struct iwl_mvm_rx_phy_data *phy_data) 1632 { 1633 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1634 struct ieee80211_radiotap_lsig *lsig; 1635 1636 switch (phy_data->info_type) { 1637 case IWL_RX_PHY_INFO_TYPE_HT: 1638 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1639 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1640 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1641 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1642 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1643 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1644 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1645 lsig = skb_put(skb, sizeof(*lsig)); 1646 lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN); 1647 lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1, 1648 IWL_RX_PHY_DATA1_LSIG_LEN_MASK), 1649 IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH); 1650 rx_status->flag |= RX_FLAG_RADIOTAP_LSIG; 1651 break; 1652 default: 1653 break; 1654 } 1655 } 1656 1657 static inline u8 iwl_mvm_nl80211_band_from_rx_msdu(u8 phy_band) 1658 { 1659 switch (phy_band) { 1660 case PHY_BAND_24: 1661 return NL80211_BAND_2GHZ; 1662 case PHY_BAND_5: 1663 return NL80211_BAND_5GHZ; 1664 case PHY_BAND_6: 1665 return NL80211_BAND_6GHZ; 1666 default: 1667 WARN_ONCE(1, "Unsupported phy band (%u)\n", phy_band); 1668 return NL80211_BAND_5GHZ; 1669 } 1670 } 1671 1672 struct iwl_rx_sta_csa { 1673 bool all_sta_unblocked; 1674 struct ieee80211_vif *vif; 1675 }; 1676 1677 static void iwl_mvm_rx_get_sta_block_tx(void *data, struct ieee80211_sta *sta) 1678 { 1679 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1680 struct iwl_rx_sta_csa *rx_sta_csa = data; 1681 1682 if (mvmsta->vif != rx_sta_csa->vif) 1683 return; 1684 1685 if (mvmsta->disable_tx) 1686 rx_sta_csa->all_sta_unblocked = false; 1687 } 1688 1689 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 1690 struct iwl_rx_cmd_buffer *rxb, int queue) 1691 { 1692 struct ieee80211_rx_status *rx_status; 1693 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1694 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 1695 struct ieee80211_hdr *hdr; 1696 u32 len; 1697 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 1698 u32 rate_n_flags, gp2_on_air_rise; 1699 u16 phy_info; 1700 struct ieee80211_sta *sta = NULL; 1701 struct sk_buff *skb; 1702 u8 crypt_len = 0, channel, energy_a, energy_b; 1703 size_t desc_size; 1704 struct iwl_mvm_rx_phy_data phy_data = { 1705 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1706 }; 1707 u32 format; 1708 bool is_sgi; 1709 1710 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1711 return; 1712 1713 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1714 desc_size = sizeof(*desc); 1715 else 1716 desc_size = IWL_RX_DESC_SIZE_V1; 1717 1718 if (unlikely(pkt_len < desc_size)) { 1719 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n"); 1720 return; 1721 } 1722 1723 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 1724 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags); 1725 channel = desc->v3.channel; 1726 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise); 1727 energy_a = desc->v3.energy_a; 1728 energy_b = desc->v3.energy_b; 1729 1730 phy_data.d0 = desc->v3.phy_data0; 1731 phy_data.d1 = desc->v3.phy_data1; 1732 phy_data.d2 = desc->v3.phy_data2; 1733 phy_data.d3 = desc->v3.phy_data3; 1734 } else { 1735 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags); 1736 channel = desc->v1.channel; 1737 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise); 1738 energy_a = desc->v1.energy_a; 1739 energy_b = desc->v1.energy_b; 1740 1741 phy_data.d0 = desc->v1.phy_data0; 1742 phy_data.d1 = desc->v1.phy_data1; 1743 phy_data.d2 = desc->v1.phy_data2; 1744 phy_data.d3 = desc->v1.phy_data3; 1745 } 1746 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 1747 REPLY_RX_MPDU_CMD, 0) < 4) { 1748 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1749 IWL_DEBUG_DROP(mvm, "Got old format rate, converting. New rate: 0x%x\n", 1750 rate_n_flags); 1751 } 1752 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1753 1754 len = le16_to_cpu(desc->mpdu_len); 1755 1756 if (unlikely(len + desc_size > pkt_len)) { 1757 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 1758 return; 1759 } 1760 1761 phy_info = le16_to_cpu(desc->phy_info); 1762 phy_data.d4 = desc->phy_data4; 1763 1764 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1765 phy_data.info_type = 1766 le32_get_bits(phy_data.d1, 1767 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1768 1769 hdr = (void *)(pkt->data + desc_size); 1770 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1771 * ieee80211_hdr pulled. 1772 */ 1773 skb = alloc_skb(128, GFP_ATOMIC); 1774 if (!skb) { 1775 IWL_ERR(mvm, "alloc_skb failed\n"); 1776 return; 1777 } 1778 1779 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 1780 /* 1781 * If the device inserted padding it means that (it thought) 1782 * the 802.11 header wasn't a multiple of 4 bytes long. In 1783 * this case, reserve two bytes at the start of the SKB to 1784 * align the payload properly in case we end up copying it. 1785 */ 1786 skb_reserve(skb, 2); 1787 } 1788 1789 rx_status = IEEE80211_SKB_RXCB(skb); 1790 1791 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1792 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1793 case RATE_MCS_CHAN_WIDTH_20: 1794 break; 1795 case RATE_MCS_CHAN_WIDTH_40: 1796 rx_status->bw = RATE_INFO_BW_40; 1797 break; 1798 case RATE_MCS_CHAN_WIDTH_80: 1799 rx_status->bw = RATE_INFO_BW_80; 1800 break; 1801 case RATE_MCS_CHAN_WIDTH_160: 1802 rx_status->bw = RATE_INFO_BW_160; 1803 break; 1804 } 1805 1806 if (format == RATE_MCS_HE_MSK) 1807 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1808 phy_info, queue); 1809 1810 iwl_mvm_decode_lsig(skb, &phy_data); 1811 1812 /* 1813 * Keep packets with CRC errors (and with overrun) for monitor mode 1814 * (otherwise the firmware discards them) but mark them as bad. 1815 */ 1816 if (!(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_CRC_OK)) || 1817 !(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 1818 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 1819 le32_to_cpu(desc->status)); 1820 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 1821 } 1822 /* set the preamble flag if appropriate */ 1823 if (format == RATE_MCS_CCK_MSK && 1824 phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 1825 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 1826 1827 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 1828 u64 tsf_on_air_rise; 1829 1830 if (mvm->trans->trans_cfg->device_family >= 1831 IWL_DEVICE_FAMILY_AX210) 1832 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise); 1833 else 1834 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise); 1835 1836 rx_status->mactime = tsf_on_air_rise; 1837 /* TSF as indicated by the firmware is at INA time */ 1838 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 1839 } 1840 1841 rx_status->device_timestamp = gp2_on_air_rise; 1842 if (iwl_mvm_is_band_in_rx_supported(mvm)) { 1843 u8 band = BAND_IN_RX_STATUS(desc->mac_phy_idx); 1844 1845 rx_status->band = iwl_mvm_nl80211_band_from_rx_msdu(band); 1846 } else { 1847 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1848 NL80211_BAND_2GHZ; 1849 } 1850 rx_status->freq = ieee80211_channel_to_frequency(channel, 1851 rx_status->band); 1852 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1853 energy_b); 1854 1855 /* update aggregation data for monitor sake on default queue */ 1856 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1857 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1858 1859 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1860 /* 1861 * Toggle is switched whenever new aggregation starts. Make 1862 * sure ampdu_reference is never 0 so we can later use it to 1863 * see if the frame was really part of an A-MPDU or not. 1864 */ 1865 if (toggle_bit != mvm->ampdu_toggle) { 1866 mvm->ampdu_ref++; 1867 if (mvm->ampdu_ref == 0) 1868 mvm->ampdu_ref++; 1869 mvm->ampdu_toggle = toggle_bit; 1870 } 1871 rx_status->ampdu_reference = mvm->ampdu_ref; 1872 } 1873 1874 if (unlikely(mvm->monitor_on)) 1875 iwl_mvm_add_rtap_sniffer_config(mvm, skb); 1876 1877 rcu_read_lock(); 1878 1879 if (desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 1880 u8 id = le32_get_bits(desc->status, IWL_RX_MPDU_STATUS_STA_ID); 1881 1882 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 1883 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 1884 if (IS_ERR(sta)) 1885 sta = NULL; 1886 } 1887 } else if (!is_multicast_ether_addr(hdr->addr2)) { 1888 /* 1889 * This is fine since we prevent two stations with the same 1890 * address from being added. 1891 */ 1892 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 1893 } 1894 1895 if (iwl_mvm_rx_crypto(mvm, sta, hdr, rx_status, phy_info, desc, 1896 le32_to_cpu(pkt->len_n_flags), queue, 1897 &crypt_len)) { 1898 kfree_skb(skb); 1899 goto out; 1900 } 1901 1902 if (sta) { 1903 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1904 struct ieee80211_vif *tx_blocked_vif = 1905 rcu_dereference(mvm->csa_tx_blocked_vif); 1906 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 1907 IWL_RX_MPDU_REORDER_BAID_MASK) >> 1908 IWL_RX_MPDU_REORDER_BAID_SHIFT); 1909 struct iwl_fw_dbg_trigger_tlv *trig; 1910 struct ieee80211_vif *vif = mvmsta->vif; 1911 1912 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 1913 !is_multicast_ether_addr(hdr->addr1) && 1914 ieee80211_is_data(hdr->frame_control) && 1915 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1916 schedule_delayed_work(&mvm->tcm.work, 0); 1917 1918 /* 1919 * We have tx blocked stations (with CS bit). If we heard 1920 * frames from a blocked station on a new channel we can 1921 * TX to it again. 1922 */ 1923 if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) { 1924 struct iwl_mvm_vif *mvmvif = 1925 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1926 struct iwl_rx_sta_csa rx_sta_csa = { 1927 .all_sta_unblocked = true, 1928 .vif = tx_blocked_vif, 1929 }; 1930 1931 if (mvmvif->csa_target_freq == rx_status->freq) 1932 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 1933 false); 1934 ieee80211_iterate_stations_atomic(mvm->hw, 1935 iwl_mvm_rx_get_sta_block_tx, 1936 &rx_sta_csa); 1937 1938 if (rx_sta_csa.all_sta_unblocked) { 1939 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1940 /* Unblock BCAST / MCAST station */ 1941 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1942 cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork); 1943 } 1944 } 1945 1946 rs_update_last_rssi(mvm, mvmsta, rx_status); 1947 1948 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 1949 ieee80211_vif_to_wdev(vif), 1950 FW_DBG_TRIGGER_RSSI); 1951 1952 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 1953 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 1954 s32 rssi; 1955 1956 rssi_trig = (void *)trig->data; 1957 rssi = le32_to_cpu(rssi_trig->rssi); 1958 1959 if (rx_status->signal < rssi) 1960 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1961 #if defined(__linux__) 1962 NULL); 1963 #elif defined(__FreeBSD__) 1964 ""); 1965 #endif 1966 } 1967 1968 if (ieee80211_is_data(hdr->frame_control)) 1969 iwl_mvm_rx_csum(mvm, sta, skb, pkt); 1970 1971 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1972 kfree_skb(skb); 1973 goto out; 1974 } 1975 1976 /* 1977 * Our hardware de-aggregates AMSDUs but copies the mac header 1978 * as it to the de-aggregated MPDUs. We need to turn off the 1979 * AMSDU bit in the QoS control ourselves. 1980 * In addition, HW reverses addr3 and addr4 - reverse it back. 1981 */ 1982 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1983 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1984 u8 *qc = ieee80211_get_qos_ctl(hdr); 1985 1986 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1987 1988 if (mvm->trans->trans_cfg->device_family == 1989 IWL_DEVICE_FAMILY_9000) { 1990 iwl_mvm_flip_address(hdr->addr3); 1991 1992 if (ieee80211_has_a4(hdr->frame_control)) 1993 iwl_mvm_flip_address(hdr->addr4); 1994 } 1995 } 1996 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1997 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1998 1999 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 2000 } 2001 } 2002 2003 is_sgi = format == RATE_MCS_HE_MSK ? 2004 iwl_he_is_sgi(rate_n_flags) : 2005 rate_n_flags & RATE_MCS_SGI_MSK; 2006 2007 if (!(format == RATE_MCS_CCK_MSK) && is_sgi) 2008 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 2009 if (rate_n_flags & RATE_MCS_LDPC_MSK) 2010 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 2011 if (format == RATE_MCS_HT_MSK) { 2012 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2013 RATE_MCS_STBC_POS; 2014 rx_status->encoding = RX_ENC_HT; 2015 rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags); 2016 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2017 } else if (format == RATE_MCS_VHT_MSK) { 2018 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2019 RATE_MCS_STBC_POS; 2020 rx_status->nss = ((rate_n_flags & RATE_MCS_NSS_MSK) >> 2021 RATE_MCS_NSS_POS) + 1; 2022 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 2023 rx_status->encoding = RX_ENC_VHT; 2024 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2025 if (rate_n_flags & RATE_MCS_BF_MSK) 2026 rx_status->enc_flags |= RX_ENC_FLAG_BF; 2027 } else if (!(format == RATE_MCS_HE_MSK)) { 2028 int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 2029 rx_status->band); 2030 2031 if (WARN(rate < 0 || rate > 0xFF, 2032 "Invalid rate flags 0x%x, band %d,\n", 2033 rate_n_flags, rx_status->band)) { 2034 kfree_skb(skb); 2035 goto out; 2036 } 2037 rx_status->rate_idx = rate; 2038 } 2039 2040 /* management stuff on default queue */ 2041 if (!queue) { 2042 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 2043 ieee80211_is_probe_resp(hdr->frame_control)) && 2044 mvm->sched_scan_pass_all == 2045 SCHED_SCAN_PASS_ALL_ENABLED)) 2046 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 2047 2048 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 2049 ieee80211_is_probe_resp(hdr->frame_control))) 2050 rx_status->boottime_ns = ktime_get_boottime_ns(); 2051 } 2052 2053 if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) { 2054 kfree_skb(skb); 2055 goto out; 2056 } 2057 2058 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 2059 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, 2060 sta); 2061 out: 2062 rcu_read_unlock(); 2063 } 2064 2065 void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi, 2066 struct iwl_rx_cmd_buffer *rxb, int queue) 2067 { 2068 struct ieee80211_rx_status *rx_status; 2069 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2070 struct iwl_rx_no_data *desc = (void *)pkt->data; 2071 u32 rate_n_flags = le32_to_cpu(desc->rate); 2072 u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time); 2073 u32 rssi = le32_to_cpu(desc->rssi); 2074 u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK; 2075 u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD; 2076 struct ieee80211_sta *sta = NULL; 2077 struct sk_buff *skb; 2078 u8 channel, energy_a, energy_b; 2079 u32 format; 2080 struct iwl_mvm_rx_phy_data phy_data = { 2081 .info_type = le32_get_bits(desc->phy_info[1], 2082 IWL_RX_PHY_DATA1_INFO_TYPE_MASK), 2083 .d0 = desc->phy_info[0], 2084 .d1 = desc->phy_info[1], 2085 }; 2086 bool is_sgi; 2087 2088 if (iwl_fw_lookup_notif_ver(mvm->fw, DATA_PATH_GROUP, 2089 RX_NO_DATA_NOTIF, 0) < 2) { 2090 IWL_DEBUG_DROP(mvm, "Got an old rate format. Old rate: 0x%x\n", 2091 rate_n_flags); 2092 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 2093 IWL_DEBUG_DROP(mvm, " Rate after conversion to the new format: 0x%x\n", 2094 rate_n_flags); 2095 } 2096 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 2097 2098 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*desc))) 2099 return; 2100 2101 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 2102 return; 2103 2104 energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS; 2105 energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS; 2106 channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS; 2107 2108 /* Dont use dev_alloc_skb(), we'll have enough headroom once 2109 * ieee80211_hdr pulled. 2110 */ 2111 skb = alloc_skb(128, GFP_ATOMIC); 2112 if (!skb) { 2113 IWL_ERR(mvm, "alloc_skb failed\n"); 2114 return; 2115 } 2116 2117 rx_status = IEEE80211_SKB_RXCB(skb); 2118 2119 /* 0-length PSDU */ 2120 rx_status->flag |= RX_FLAG_NO_PSDU; 2121 2122 switch (info_type) { 2123 case RX_NO_DATA_INFO_TYPE_NDP: 2124 rx_status->zero_length_psdu_type = 2125 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING; 2126 break; 2127 case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED: 2128 case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED: 2129 rx_status->zero_length_psdu_type = 2130 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED; 2131 break; 2132 default: 2133 rx_status->zero_length_psdu_type = 2134 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR; 2135 break; 2136 } 2137 2138 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 2139 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 2140 case RATE_MCS_CHAN_WIDTH_20: 2141 break; 2142 case RATE_MCS_CHAN_WIDTH_40: 2143 rx_status->bw = RATE_INFO_BW_40; 2144 break; 2145 case RATE_MCS_CHAN_WIDTH_80: 2146 rx_status->bw = RATE_INFO_BW_80; 2147 break; 2148 case RATE_MCS_CHAN_WIDTH_160: 2149 rx_status->bw = RATE_INFO_BW_160; 2150 break; 2151 } 2152 2153 if (format == RATE_MCS_HE_MSK) 2154 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 2155 phy_info, queue); 2156 2157 iwl_mvm_decode_lsig(skb, &phy_data); 2158 2159 rx_status->device_timestamp = gp2_on_air_rise; 2160 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 2161 NL80211_BAND_2GHZ; 2162 rx_status->freq = ieee80211_channel_to_frequency(channel, 2163 rx_status->band); 2164 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 2165 energy_b); 2166 2167 rcu_read_lock(); 2168 2169 is_sgi = format == RATE_MCS_HE_MSK ? 2170 iwl_he_is_sgi(rate_n_flags) : 2171 rate_n_flags & RATE_MCS_SGI_MSK; 2172 2173 if (!(format == RATE_MCS_CCK_MSK) && is_sgi) 2174 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 2175 if (rate_n_flags & RATE_MCS_LDPC_MSK) 2176 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 2177 if (format == RATE_MCS_HT_MSK) { 2178 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2179 RATE_MCS_STBC_POS; 2180 rx_status->encoding = RX_ENC_HT; 2181 rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags); 2182 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2183 } else if (format == RATE_MCS_VHT_MSK) { 2184 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2185 RATE_MCS_STBC_POS; 2186 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 2187 rx_status->encoding = RX_ENC_VHT; 2188 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2189 if (rate_n_flags & RATE_MCS_BF_MSK) 2190 rx_status->enc_flags |= RX_ENC_FLAG_BF; 2191 /* 2192 * take the nss from the rx_vec since the rate_n_flags has 2193 * only 2 bits for the nss which gives a max of 4 ss but 2194 * there may be up to 8 spatial streams 2195 */ 2196 rx_status->nss = 2197 le32_get_bits(desc->rx_vec[0], 2198 RX_NO_DATA_RX_VEC0_VHT_NSTS_MSK) + 1; 2199 } else if (format == RATE_MCS_HE_MSK) { 2200 rx_status->nss = 2201 le32_get_bits(desc->rx_vec[0], 2202 RX_NO_DATA_RX_VEC0_HE_NSTS_MSK) + 1; 2203 } else { 2204 int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 2205 rx_status->band); 2206 2207 if (WARN(rate < 0 || rate > 0xFF, 2208 "Invalid rate flags 0x%x, band %d,\n", 2209 rate_n_flags, rx_status->band)) { 2210 kfree_skb(skb); 2211 goto out; 2212 } 2213 rx_status->rate_idx = rate; 2214 } 2215 2216 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 2217 out: 2218 rcu_read_unlock(); 2219 } 2220 2221 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 2222 struct iwl_rx_cmd_buffer *rxb, int queue) 2223 { 2224 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2225 struct iwl_frame_release *release = (void *)pkt->data; 2226 2227 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release))) 2228 return; 2229 2230 iwl_mvm_release_frames_from_notif(mvm, napi, release->baid, 2231 le16_to_cpu(release->nssn), 2232 queue, 0); 2233 } 2234 2235 void iwl_mvm_rx_bar_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 2236 struct iwl_rx_cmd_buffer *rxb, int queue) 2237 { 2238 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2239 struct iwl_bar_frame_release *release = (void *)pkt->data; 2240 unsigned int baid = le32_get_bits(release->ba_info, 2241 IWL_BAR_FRAME_RELEASE_BAID_MASK); 2242 unsigned int nssn = le32_get_bits(release->ba_info, 2243 IWL_BAR_FRAME_RELEASE_NSSN_MASK); 2244 unsigned int sta_id = le32_get_bits(release->sta_tid, 2245 IWL_BAR_FRAME_RELEASE_STA_MASK); 2246 unsigned int tid = le32_get_bits(release->sta_tid, 2247 IWL_BAR_FRAME_RELEASE_TID_MASK); 2248 struct iwl_mvm_baid_data *baid_data; 2249 2250 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release))) 2251 return; 2252 2253 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID || 2254 baid >= ARRAY_SIZE(mvm->baid_map))) 2255 return; 2256 2257 rcu_read_lock(); 2258 baid_data = rcu_dereference(mvm->baid_map[baid]); 2259 if (!baid_data) { 2260 IWL_DEBUG_RX(mvm, 2261 "Got valid BAID %d but not allocated, invalid BAR release!\n", 2262 baid); 2263 goto out; 2264 } 2265 2266 if (WARN(tid != baid_data->tid || sta_id != baid_data->sta_id, 2267 "baid 0x%x is mapped to sta:%d tid:%d, but BAR release received for sta:%d tid:%d\n", 2268 baid, baid_data->sta_id, baid_data->tid, sta_id, 2269 tid)) 2270 goto out; 2271 2272 iwl_mvm_release_frames_from_notif(mvm, napi, baid, nssn, queue, 0); 2273 out: 2274 rcu_read_unlock(); 2275 } 2276