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 u8 tid = ieee80211_get_tid(hdr); 967 u8 sub_frame_idx = desc->amsdu_info & 968 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; 969 struct iwl_mvm_reorder_buf_entry *entries; 970 int index; 971 u16 nssn, sn; 972 u8 baid; 973 974 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >> 975 IWL_RX_MPDU_REORDER_BAID_SHIFT; 976 977 /* 978 * This also covers the case of receiving a Block Ack Request 979 * outside a BA session; we'll pass it to mac80211 and that 980 * then sends a delBA action frame. 981 * This also covers pure monitor mode, in which case we won't 982 * have any BA sessions. 983 */ 984 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID) 985 return false; 986 987 /* no sta yet */ 988 if (WARN_ONCE(IS_ERR_OR_NULL(sta), 989 "Got valid BAID without a valid station assigned\n")) 990 return false; 991 992 mvm_sta = iwl_mvm_sta_from_mac80211(sta); 993 994 /* not a data packet or a bar */ 995 if (!ieee80211_is_back_req(hdr->frame_control) && 996 (!ieee80211_is_data_qos(hdr->frame_control) || 997 is_multicast_ether_addr(hdr->addr1))) 998 return false; 999 1000 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 1001 return false; 1002 1003 baid_data = rcu_dereference(mvm->baid_map[baid]); 1004 if (!baid_data) { 1005 IWL_DEBUG_RX(mvm, 1006 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 1007 baid, reorder); 1008 return false; 1009 } 1010 1011 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id, 1012 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n", 1013 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id, 1014 tid)) 1015 return false; 1016 1017 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; 1018 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >> 1019 IWL_RX_MPDU_REORDER_SN_SHIFT; 1020 1021 buffer = &baid_data->reorder_buf[queue]; 1022 entries = &baid_data->entries[queue * baid_data->entries_per_queue]; 1023 1024 spin_lock_bh(&buffer->lock); 1025 1026 if (!buffer->valid) { 1027 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) { 1028 spin_unlock_bh(&buffer->lock); 1029 return false; 1030 } 1031 buffer->valid = true; 1032 } 1033 1034 if (ieee80211_is_back_req(hdr->frame_control)) { 1035 iwl_mvm_release_frames(mvm, sta, napi, baid_data, 1036 buffer, nssn, 0); 1037 goto drop; 1038 } 1039 1040 /* 1041 * If there was a significant jump in the nssn - adjust. 1042 * If the SN is smaller than the NSSN it might need to first go into 1043 * the reorder buffer, in which case we just release up to it and the 1044 * rest of the function will take care of storing it and releasing up to 1045 * the nssn. 1046 * This should not happen. This queue has been lagging and it should 1047 * have been updated by a IWL_MVM_RXQ_NSSN_SYNC notification. Be nice 1048 * and update the other queues. 1049 */ 1050 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size, 1051 buffer->buf_size) || 1052 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) { 1053 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn; 1054 1055 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, 1056 min_sn, IWL_MVM_RELEASE_SEND_RSS_SYNC); 1057 } 1058 1059 iwl_mvm_oldsn_workaround(mvm, sta, tid, buffer, reorder, 1060 rx_status->device_timestamp, queue); 1061 1062 /* drop any oudated packets */ 1063 if (ieee80211_sn_less(sn, buffer->head_sn)) 1064 goto drop; 1065 1066 /* release immediately if allowed by nssn and no stored frames */ 1067 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) { 1068 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn, 1069 buffer->buf_size) && 1070 (!amsdu || last_subframe)) { 1071 /* 1072 * If we crossed the 2048 or 0 SN, notify all the 1073 * queues. This is done in order to avoid having a 1074 * head_sn that lags behind for too long. When that 1075 * happens, we can get to a situation where the head_sn 1076 * is within the interval [nssn - buf_size : nssn] 1077 * which will make us think that the nssn is a packet 1078 * that we already freed because of the reordering 1079 * buffer and we will ignore it. So maintain the 1080 * head_sn somewhat updated across all the queues: 1081 * when it crosses 0 and 2048. 1082 */ 1083 if (sn == 2048 || sn == 0) 1084 iwl_mvm_sync_nssn(mvm, baid, sn); 1085 buffer->head_sn = nssn; 1086 } 1087 /* No need to update AMSDU last SN - we are moving the head */ 1088 spin_unlock_bh(&buffer->lock); 1089 return false; 1090 } 1091 1092 /* 1093 * release immediately if there are no stored frames, and the sn is 1094 * equal to the head. 1095 * This can happen due to reorder timer, where NSSN is behind head_sn. 1096 * When we released everything, and we got the next frame in the 1097 * sequence, according to the NSSN we can't release immediately, 1098 * while technically there is no hole and we can move forward. 1099 */ 1100 if (!buffer->num_stored && sn == buffer->head_sn) { 1101 if (!amsdu || last_subframe) { 1102 if (sn == 2048 || sn == 0) 1103 iwl_mvm_sync_nssn(mvm, baid, sn); 1104 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn); 1105 } 1106 /* No need to update AMSDU last SN - we are moving the head */ 1107 spin_unlock_bh(&buffer->lock); 1108 return false; 1109 } 1110 1111 index = sn % buffer->buf_size; 1112 1113 /* 1114 * Check if we already stored this frame 1115 * As AMSDU is either received or not as whole, logic is simple: 1116 * If we have frames in that position in the buffer and the last frame 1117 * originated from AMSDU had a different SN then it is a retransmission. 1118 * If it is the same SN then if the subframe index is incrementing it 1119 * is the same AMSDU - otherwise it is a retransmission. 1120 */ 1121 tail = skb_peek_tail(&entries[index].e.frames); 1122 if (tail && !amsdu) 1123 goto drop; 1124 else if (tail && (sn != buffer->last_amsdu || 1125 buffer->last_sub_index >= sub_frame_idx)) 1126 goto drop; 1127 1128 /* put in reorder buffer */ 1129 __skb_queue_tail(&entries[index].e.frames, skb); 1130 buffer->num_stored++; 1131 entries[index].e.reorder_time = jiffies; 1132 1133 if (amsdu) { 1134 buffer->last_amsdu = sn; 1135 buffer->last_sub_index = sub_frame_idx; 1136 } 1137 1138 /* 1139 * We cannot trust NSSN for AMSDU sub-frames that are not the last. 1140 * The reason is that NSSN advances on the first sub-frame, and may 1141 * cause the reorder buffer to advance before all the sub-frames arrive. 1142 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with 1143 * SN 1. NSSN for first sub frame will be 3 with the result of driver 1144 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is 1145 * already ahead and it will be dropped. 1146 * If the last sub-frame is not on this queue - we will get frame 1147 * release notification with up to date NSSN. 1148 */ 1149 if (!amsdu || last_subframe) 1150 iwl_mvm_release_frames(mvm, sta, napi, baid_data, 1151 buffer, nssn, 1152 IWL_MVM_RELEASE_SEND_RSS_SYNC); 1153 1154 spin_unlock_bh(&buffer->lock); 1155 return true; 1156 1157 drop: 1158 kfree_skb(skb); 1159 spin_unlock_bh(&buffer->lock); 1160 return true; 1161 } 1162 1163 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, 1164 u32 reorder_data, u8 baid) 1165 { 1166 unsigned long now = jiffies; 1167 unsigned long timeout; 1168 struct iwl_mvm_baid_data *data; 1169 1170 rcu_read_lock(); 1171 1172 data = rcu_dereference(mvm->baid_map[baid]); 1173 if (!data) { 1174 IWL_DEBUG_RX(mvm, 1175 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n", 1176 baid, reorder_data); 1177 goto out; 1178 } 1179 1180 if (!data->timeout) 1181 goto out; 1182 1183 timeout = data->timeout; 1184 /* 1185 * Do not update last rx all the time to avoid cache bouncing 1186 * between the rx queues. 1187 * Update it every timeout. Worst case is the session will 1188 * expire after ~ 2 * timeout, which doesn't matter that much. 1189 */ 1190 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now)) 1191 /* Update is atomic */ 1192 data->last_rx = now; 1193 1194 out: 1195 rcu_read_unlock(); 1196 } 1197 1198 static void iwl_mvm_flip_address(u8 *addr) 1199 { 1200 int i; 1201 u8 mac_addr[ETH_ALEN]; 1202 1203 for (i = 0; i < ETH_ALEN; i++) 1204 mac_addr[i] = addr[ETH_ALEN - i - 1]; 1205 ether_addr_copy(addr, mac_addr); 1206 } 1207 1208 struct iwl_mvm_rx_phy_data { 1209 enum iwl_rx_phy_info_type info_type; 1210 __le32 d0, d1, d2, d3; 1211 __le16 d4; 1212 }; 1213 1214 static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm, 1215 struct iwl_mvm_rx_phy_data *phy_data, 1216 u32 rate_n_flags, 1217 struct ieee80211_radiotap_he_mu *he_mu) 1218 { 1219 u32 phy_data2 = le32_to_cpu(phy_data->d2); 1220 u32 phy_data3 = le32_to_cpu(phy_data->d3); 1221 u16 phy_data4 = le16_to_cpu(phy_data->d4); 1222 1223 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) { 1224 he_mu->flags1 |= 1225 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN | 1226 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN); 1227 1228 he_mu->flags1 |= 1229 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU, 1230 phy_data4), 1231 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU); 1232 1233 he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0, 1234 phy_data2); 1235 he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1, 1236 phy_data3); 1237 he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2, 1238 phy_data2); 1239 he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3, 1240 phy_data3); 1241 } 1242 1243 if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) && 1244 (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) != RATE_MCS_CHAN_WIDTH_20) { 1245 he_mu->flags1 |= 1246 cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN | 1247 IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN); 1248 1249 he_mu->flags2 |= 1250 le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU, 1251 phy_data4), 1252 IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU); 1253 1254 he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0, 1255 phy_data2); 1256 he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1, 1257 phy_data3); 1258 he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2, 1259 phy_data2); 1260 he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3, 1261 phy_data3); 1262 } 1263 } 1264 1265 static void 1266 iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data, 1267 u32 rate_n_flags, 1268 struct ieee80211_radiotap_he *he, 1269 struct ieee80211_radiotap_he_mu *he_mu, 1270 struct ieee80211_rx_status *rx_status) 1271 { 1272 /* 1273 * Unfortunately, we have to leave the mac80211 data 1274 * incorrect for the case that we receive an HE-MU 1275 * transmission and *don't* have the HE phy data (due 1276 * to the bits being used for TSF). This shouldn't 1277 * happen though as management frames where we need 1278 * the TSF/timers are not be transmitted in HE-MU. 1279 */ 1280 u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK); 1281 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK_V1; 1282 u8 offs = 0; 1283 1284 rx_status->bw = RATE_INFO_BW_HE_RU; 1285 1286 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1287 1288 switch (ru) { 1289 case 0 ... 36: 1290 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26; 1291 offs = ru; 1292 break; 1293 case 37 ... 52: 1294 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52; 1295 offs = ru - 37; 1296 break; 1297 case 53 ... 60: 1298 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1299 offs = ru - 53; 1300 break; 1301 case 61 ... 64: 1302 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242; 1303 offs = ru - 61; 1304 break; 1305 case 65 ... 66: 1306 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484; 1307 offs = ru - 65; 1308 break; 1309 case 67: 1310 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996; 1311 break; 1312 case 68: 1313 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996; 1314 break; 1315 } 1316 he->data2 |= le16_encode_bits(offs, 1317 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET); 1318 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN | 1319 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN); 1320 if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80)) 1321 he->data2 |= 1322 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC); 1323 1324 #define CHECK_BW(bw) \ 1325 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \ 1326 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS); \ 1327 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_ ## bw ## MHZ != \ 1328 RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS) 1329 CHECK_BW(20); 1330 CHECK_BW(40); 1331 CHECK_BW(80); 1332 CHECK_BW(160); 1333 1334 if (he_mu) 1335 he_mu->flags2 |= 1336 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1, 1337 rate_n_flags), 1338 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW); 1339 else if (he_type == RATE_MCS_HE_TYPE_TRIG_V1) 1340 he->data6 |= 1341 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_KNOWN) | 1342 le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1, 1343 rate_n_flags), 1344 IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW); 1345 } 1346 1347 static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm, 1348 struct iwl_mvm_rx_phy_data *phy_data, 1349 struct ieee80211_radiotap_he *he, 1350 struct ieee80211_radiotap_he_mu *he_mu, 1351 struct ieee80211_rx_status *rx_status, 1352 u32 rate_n_flags, int queue) 1353 { 1354 switch (phy_data->info_type) { 1355 case IWL_RX_PHY_INFO_TYPE_NONE: 1356 case IWL_RX_PHY_INFO_TYPE_CCK: 1357 case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY: 1358 case IWL_RX_PHY_INFO_TYPE_HT: 1359 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1360 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1361 return; 1362 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1363 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN | 1364 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN | 1365 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN | 1366 IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN); 1367 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1368 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1), 1369 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1); 1370 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1371 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2), 1372 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2); 1373 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1374 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3), 1375 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3); 1376 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2, 1377 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4), 1378 IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4); 1379 fallthrough; 1380 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1381 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1382 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1383 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1384 /* HE common */ 1385 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN | 1386 IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN | 1387 IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN); 1388 he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN | 1389 IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN | 1390 IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN | 1391 IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN); 1392 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1393 IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK), 1394 IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR); 1395 if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB && 1396 phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) { 1397 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN); 1398 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1399 IWL_RX_PHY_DATA0_HE_UPLINK), 1400 IEEE80211_RADIOTAP_HE_DATA3_UL_DL); 1401 } 1402 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1403 IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM), 1404 IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG); 1405 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1406 IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK), 1407 IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD); 1408 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1409 IWL_RX_PHY_DATA0_HE_PE_DISAMBIG), 1410 IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG); 1411 he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1, 1412 IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK), 1413 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS); 1414 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1415 IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK), 1416 IEEE80211_RADIOTAP_HE_DATA6_TXOP); 1417 he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1418 IWL_RX_PHY_DATA0_HE_DOPPLER), 1419 IEEE80211_RADIOTAP_HE_DATA6_DOPPLER); 1420 break; 1421 } 1422 1423 switch (phy_data->info_type) { 1424 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1425 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1426 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1427 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN); 1428 he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1429 IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK), 1430 IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE); 1431 break; 1432 default: 1433 /* nothing here */ 1434 break; 1435 } 1436 1437 switch (phy_data->info_type) { 1438 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1439 he_mu->flags1 |= 1440 le16_encode_bits(le16_get_bits(phy_data->d4, 1441 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM), 1442 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM); 1443 he_mu->flags1 |= 1444 le16_encode_bits(le16_get_bits(phy_data->d4, 1445 IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK), 1446 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS); 1447 he_mu->flags2 |= 1448 le16_encode_bits(le16_get_bits(phy_data->d4, 1449 IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK), 1450 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW); 1451 iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu); 1452 fallthrough; 1453 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1454 he_mu->flags2 |= 1455 le16_encode_bits(le32_get_bits(phy_data->d1, 1456 IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK), 1457 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS); 1458 he_mu->flags2 |= 1459 le16_encode_bits(le32_get_bits(phy_data->d1, 1460 IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION), 1461 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP); 1462 fallthrough; 1463 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1464 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1465 iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags, 1466 he, he_mu, rx_status); 1467 break; 1468 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1469 he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN); 1470 he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0, 1471 IWL_RX_PHY_DATA0_HE_BEAM_CHNG), 1472 IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE); 1473 break; 1474 default: 1475 /* nothing */ 1476 break; 1477 } 1478 } 1479 1480 static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb, 1481 struct iwl_mvm_rx_phy_data *phy_data, 1482 u32 rate_n_flags, u16 phy_info, int queue) 1483 { 1484 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1485 struct ieee80211_radiotap_he *he = NULL; 1486 struct ieee80211_radiotap_he_mu *he_mu = NULL; 1487 u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 1488 u8 stbc, ltf; 1489 static const struct ieee80211_radiotap_he known = { 1490 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 1491 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 1492 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN | 1493 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN), 1494 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN | 1495 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN), 1496 }; 1497 static const struct ieee80211_radiotap_he_mu mu_known = { 1498 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN | 1499 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN | 1500 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN | 1501 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN), 1502 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN | 1503 IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN), 1504 }; 1505 1506 he = skb_put_data(skb, &known, sizeof(known)); 1507 rx_status->flag |= RX_FLAG_RADIOTAP_HE; 1508 1509 if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU || 1510 phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) { 1511 he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known)); 1512 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU; 1513 } 1514 1515 /* report the AMPDU-EOF bit on single frames */ 1516 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1517 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1518 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1519 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1520 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1521 } 1522 1523 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1524 iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status, 1525 rate_n_flags, queue); 1526 1527 /* update aggregation data for monitor sake on default queue */ 1528 if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) && 1529 (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1530 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1531 1532 /* toggle is switched whenever new aggregation starts */ 1533 if (toggle_bit != mvm->ampdu_toggle) { 1534 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN; 1535 if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF)) 1536 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT; 1537 } 1538 } 1539 1540 if (he_type == RATE_MCS_HE_TYPE_EXT_SU && 1541 rate_n_flags & RATE_MCS_HE_106T_MSK) { 1542 rx_status->bw = RATE_INFO_BW_HE_RU; 1543 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106; 1544 } 1545 1546 /* actually data is filled in mac80211 */ 1547 if (he_type == RATE_MCS_HE_TYPE_SU || 1548 he_type == RATE_MCS_HE_TYPE_EXT_SU) 1549 he->data1 |= 1550 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 1551 1552 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS; 1553 rx_status->nss = 1554 ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1555 RATE_MCS_NSS_POS) + 1; 1556 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 1557 rx_status->encoding = RX_ENC_HE; 1558 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 1559 if (rate_n_flags & RATE_MCS_BF_MSK) 1560 rx_status->enc_flags |= RX_ENC_FLAG_BF; 1561 1562 rx_status->he_dcm = 1563 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK); 1564 1565 #define CHECK_TYPE(F) \ 1566 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \ 1567 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS)) 1568 1569 CHECK_TYPE(SU); 1570 CHECK_TYPE(EXT_SU); 1571 CHECK_TYPE(MU); 1572 CHECK_TYPE(TRIG); 1573 1574 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS); 1575 1576 if (rate_n_flags & RATE_MCS_BF_MSK) 1577 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF); 1578 1579 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >> 1580 RATE_MCS_HE_GI_LTF_POS) { 1581 case 0: 1582 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1583 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1584 else 1585 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1586 if (he_type == RATE_MCS_HE_TYPE_MU) 1587 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1588 else 1589 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X; 1590 break; 1591 case 1: 1592 if (he_type == RATE_MCS_HE_TYPE_TRIG) 1593 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1594 else 1595 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1596 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1597 break; 1598 case 2: 1599 if (he_type == RATE_MCS_HE_TYPE_TRIG) { 1600 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1601 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1602 } else { 1603 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6; 1604 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X; 1605 } 1606 break; 1607 case 3: 1608 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2; 1609 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1610 break; 1611 case 4: 1612 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8; 1613 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X; 1614 break; 1615 default: 1616 ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_UNKNOWN; 1617 } 1618 1619 he->data5 |= le16_encode_bits(ltf, 1620 IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE); 1621 } 1622 1623 static void iwl_mvm_decode_lsig(struct sk_buff *skb, 1624 struct iwl_mvm_rx_phy_data *phy_data) 1625 { 1626 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 1627 struct ieee80211_radiotap_lsig *lsig; 1628 1629 switch (phy_data->info_type) { 1630 case IWL_RX_PHY_INFO_TYPE_HT: 1631 case IWL_RX_PHY_INFO_TYPE_VHT_SU: 1632 case IWL_RX_PHY_INFO_TYPE_VHT_MU: 1633 case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT: 1634 case IWL_RX_PHY_INFO_TYPE_HE_SU: 1635 case IWL_RX_PHY_INFO_TYPE_HE_MU: 1636 case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT: 1637 case IWL_RX_PHY_INFO_TYPE_HE_TB: 1638 lsig = skb_put(skb, sizeof(*lsig)); 1639 lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN); 1640 lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1, 1641 IWL_RX_PHY_DATA1_LSIG_LEN_MASK), 1642 IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH); 1643 rx_status->flag |= RX_FLAG_RADIOTAP_LSIG; 1644 break; 1645 default: 1646 break; 1647 } 1648 } 1649 1650 static inline u8 iwl_mvm_nl80211_band_from_rx_msdu(u8 phy_band) 1651 { 1652 switch (phy_band) { 1653 case PHY_BAND_24: 1654 return NL80211_BAND_2GHZ; 1655 case PHY_BAND_5: 1656 return NL80211_BAND_5GHZ; 1657 case PHY_BAND_6: 1658 return NL80211_BAND_6GHZ; 1659 default: 1660 WARN_ONCE(1, "Unsupported phy band (%u)\n", phy_band); 1661 return NL80211_BAND_5GHZ; 1662 } 1663 } 1664 1665 struct iwl_rx_sta_csa { 1666 bool all_sta_unblocked; 1667 struct ieee80211_vif *vif; 1668 }; 1669 1670 static void iwl_mvm_rx_get_sta_block_tx(void *data, struct ieee80211_sta *sta) 1671 { 1672 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1673 struct iwl_rx_sta_csa *rx_sta_csa = data; 1674 1675 if (mvmsta->vif != rx_sta_csa->vif) 1676 return; 1677 1678 if (mvmsta->disable_tx) 1679 rx_sta_csa->all_sta_unblocked = false; 1680 } 1681 1682 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, 1683 struct iwl_rx_cmd_buffer *rxb, int queue) 1684 { 1685 struct ieee80211_rx_status *rx_status; 1686 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1687 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; 1688 struct ieee80211_hdr *hdr; 1689 u32 len; 1690 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 1691 u32 rate_n_flags, gp2_on_air_rise; 1692 u16 phy_info; 1693 struct ieee80211_sta *sta = NULL; 1694 struct sk_buff *skb; 1695 u8 crypt_len = 0, channel, energy_a, energy_b; 1696 size_t desc_size; 1697 struct iwl_mvm_rx_phy_data phy_data = { 1698 .info_type = IWL_RX_PHY_INFO_TYPE_NONE, 1699 }; 1700 u32 format; 1701 bool is_sgi; 1702 1703 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 1704 return; 1705 1706 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1707 desc_size = sizeof(*desc); 1708 else 1709 desc_size = IWL_RX_DESC_SIZE_V1; 1710 1711 if (unlikely(pkt_len < desc_size)) { 1712 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n"); 1713 return; 1714 } 1715 1716 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 1717 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags); 1718 channel = desc->v3.channel; 1719 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise); 1720 energy_a = desc->v3.energy_a; 1721 energy_b = desc->v3.energy_b; 1722 1723 phy_data.d0 = desc->v3.phy_data0; 1724 phy_data.d1 = desc->v3.phy_data1; 1725 phy_data.d2 = desc->v3.phy_data2; 1726 phy_data.d3 = desc->v3.phy_data3; 1727 } else { 1728 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags); 1729 channel = desc->v1.channel; 1730 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise); 1731 energy_a = desc->v1.energy_a; 1732 energy_b = desc->v1.energy_b; 1733 1734 phy_data.d0 = desc->v1.phy_data0; 1735 phy_data.d1 = desc->v1.phy_data1; 1736 phy_data.d2 = desc->v1.phy_data2; 1737 phy_data.d3 = desc->v1.phy_data3; 1738 } 1739 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 1740 REPLY_RX_MPDU_CMD, 0) < 4) { 1741 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1742 IWL_DEBUG_DROP(mvm, "Got old format rate, converting. New rate: 0x%x\n", 1743 rate_n_flags); 1744 } 1745 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1746 1747 len = le16_to_cpu(desc->mpdu_len); 1748 1749 if (unlikely(len + desc_size > pkt_len)) { 1750 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 1751 return; 1752 } 1753 1754 phy_info = le16_to_cpu(desc->phy_info); 1755 phy_data.d4 = desc->phy_data4; 1756 1757 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) 1758 phy_data.info_type = 1759 le32_get_bits(phy_data.d1, 1760 IWL_RX_PHY_DATA1_INFO_TYPE_MASK); 1761 1762 hdr = (void *)(pkt->data + desc_size); 1763 /* Dont use dev_alloc_skb(), we'll have enough headroom once 1764 * ieee80211_hdr pulled. 1765 */ 1766 skb = alloc_skb(128, GFP_ATOMIC); 1767 if (!skb) { 1768 IWL_ERR(mvm, "alloc_skb failed\n"); 1769 return; 1770 } 1771 1772 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) { 1773 /* 1774 * If the device inserted padding it means that (it thought) 1775 * the 802.11 header wasn't a multiple of 4 bytes long. In 1776 * this case, reserve two bytes at the start of the SKB to 1777 * align the payload properly in case we end up copying it. 1778 */ 1779 skb_reserve(skb, 2); 1780 } 1781 1782 rx_status = IEEE80211_SKB_RXCB(skb); 1783 1784 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 1785 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1786 case RATE_MCS_CHAN_WIDTH_20: 1787 break; 1788 case RATE_MCS_CHAN_WIDTH_40: 1789 rx_status->bw = RATE_INFO_BW_40; 1790 break; 1791 case RATE_MCS_CHAN_WIDTH_80: 1792 rx_status->bw = RATE_INFO_BW_80; 1793 break; 1794 case RATE_MCS_CHAN_WIDTH_160: 1795 rx_status->bw = RATE_INFO_BW_160; 1796 break; 1797 } 1798 1799 if (format == RATE_MCS_HE_MSK) 1800 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 1801 phy_info, queue); 1802 1803 iwl_mvm_decode_lsig(skb, &phy_data); 1804 1805 /* 1806 * Keep packets with CRC errors (and with overrun) for monitor mode 1807 * (otherwise the firmware discards them) but mark them as bad. 1808 */ 1809 if (!(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_CRC_OK)) || 1810 !(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { 1811 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", 1812 le32_to_cpu(desc->status)); 1813 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 1814 } 1815 /* set the preamble flag if appropriate */ 1816 if (format == RATE_MCS_CCK_MSK && 1817 phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE) 1818 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 1819 1820 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) { 1821 u64 tsf_on_air_rise; 1822 1823 if (mvm->trans->trans_cfg->device_family >= 1824 IWL_DEVICE_FAMILY_AX210) 1825 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise); 1826 else 1827 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise); 1828 1829 rx_status->mactime = tsf_on_air_rise; 1830 /* TSF as indicated by the firmware is at INA time */ 1831 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 1832 } 1833 1834 rx_status->device_timestamp = gp2_on_air_rise; 1835 if (iwl_mvm_is_band_in_rx_supported(mvm)) { 1836 u8 band = BAND_IN_RX_STATUS(desc->mac_phy_idx); 1837 1838 rx_status->band = iwl_mvm_nl80211_band_from_rx_msdu(band); 1839 } else { 1840 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 1841 NL80211_BAND_2GHZ; 1842 } 1843 rx_status->freq = ieee80211_channel_to_frequency(channel, 1844 rx_status->band); 1845 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 1846 energy_b); 1847 1848 /* update aggregation data for monitor sake on default queue */ 1849 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) { 1850 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE; 1851 1852 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 1853 /* 1854 * Toggle is switched whenever new aggregation starts. Make 1855 * sure ampdu_reference is never 0 so we can later use it to 1856 * see if the frame was really part of an A-MPDU or not. 1857 */ 1858 if (toggle_bit != mvm->ampdu_toggle) { 1859 mvm->ampdu_ref++; 1860 if (mvm->ampdu_ref == 0) 1861 mvm->ampdu_ref++; 1862 mvm->ampdu_toggle = toggle_bit; 1863 } 1864 rx_status->ampdu_reference = mvm->ampdu_ref; 1865 } 1866 1867 if (unlikely(mvm->monitor_on)) 1868 iwl_mvm_add_rtap_sniffer_config(mvm, skb); 1869 1870 rcu_read_lock(); 1871 1872 if (desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) { 1873 u8 id = le32_get_bits(desc->status, IWL_RX_MPDU_STATUS_STA_ID); 1874 1875 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 1876 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 1877 if (IS_ERR(sta)) 1878 sta = NULL; 1879 } 1880 } else if (!is_multicast_ether_addr(hdr->addr2)) { 1881 /* 1882 * This is fine since we prevent two stations with the same 1883 * address from being added. 1884 */ 1885 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 1886 } 1887 1888 if (iwl_mvm_rx_crypto(mvm, sta, hdr, rx_status, phy_info, desc, 1889 le32_to_cpu(pkt->len_n_flags), queue, 1890 &crypt_len)) { 1891 kfree_skb(skb); 1892 goto out; 1893 } 1894 1895 if (sta) { 1896 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1897 struct ieee80211_vif *tx_blocked_vif = 1898 rcu_dereference(mvm->csa_tx_blocked_vif); 1899 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) & 1900 IWL_RX_MPDU_REORDER_BAID_MASK) >> 1901 IWL_RX_MPDU_REORDER_BAID_SHIFT); 1902 struct iwl_fw_dbg_trigger_tlv *trig; 1903 struct ieee80211_vif *vif = mvmsta->vif; 1904 1905 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 1906 !is_multicast_ether_addr(hdr->addr1) && 1907 ieee80211_is_data(hdr->frame_control) && 1908 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1909 schedule_delayed_work(&mvm->tcm.work, 0); 1910 1911 /* 1912 * We have tx blocked stations (with CS bit). If we heard 1913 * frames from a blocked station on a new channel we can 1914 * TX to it again. 1915 */ 1916 if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) { 1917 struct iwl_mvm_vif *mvmvif = 1918 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1919 struct iwl_rx_sta_csa rx_sta_csa = { 1920 .all_sta_unblocked = true, 1921 .vif = tx_blocked_vif, 1922 }; 1923 1924 if (mvmvif->csa_target_freq == rx_status->freq) 1925 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 1926 false); 1927 ieee80211_iterate_stations_atomic(mvm->hw, 1928 iwl_mvm_rx_get_sta_block_tx, 1929 &rx_sta_csa); 1930 1931 if (rx_sta_csa.all_sta_unblocked) { 1932 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1933 /* Unblock BCAST / MCAST station */ 1934 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1935 cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork); 1936 } 1937 } 1938 1939 rs_update_last_rssi(mvm, mvmsta, rx_status); 1940 1941 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 1942 ieee80211_vif_to_wdev(vif), 1943 FW_DBG_TRIGGER_RSSI); 1944 1945 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 1946 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 1947 s32 rssi; 1948 1949 rssi_trig = (void *)trig->data; 1950 rssi = le32_to_cpu(rssi_trig->rssi); 1951 1952 if (rx_status->signal < rssi) 1953 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1954 NULL); 1955 } 1956 1957 if (ieee80211_is_data(hdr->frame_control)) 1958 iwl_mvm_rx_csum(mvm, sta, skb, pkt); 1959 1960 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { 1961 kfree_skb(skb); 1962 goto out; 1963 } 1964 1965 /* 1966 * Our hardware de-aggregates AMSDUs but copies the mac header 1967 * as it to the de-aggregated MPDUs. We need to turn off the 1968 * AMSDU bit in the QoS control ourselves. 1969 * In addition, HW reverses addr3 and addr4 - reverse it back. 1970 */ 1971 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && 1972 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { 1973 u8 *qc = ieee80211_get_qos_ctl(hdr); 1974 1975 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1976 1977 if (mvm->trans->trans_cfg->device_family == 1978 IWL_DEVICE_FAMILY_9000) { 1979 iwl_mvm_flip_address(hdr->addr3); 1980 1981 if (ieee80211_has_a4(hdr->frame_control)) 1982 iwl_mvm_flip_address(hdr->addr4); 1983 } 1984 } 1985 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) { 1986 u32 reorder_data = le32_to_cpu(desc->reorder_data); 1987 1988 iwl_mvm_agg_rx_received(mvm, reorder_data, baid); 1989 } 1990 } 1991 1992 is_sgi = format == RATE_MCS_HE_MSK ? 1993 iwl_he_is_sgi(rate_n_flags) : 1994 rate_n_flags & RATE_MCS_SGI_MSK; 1995 1996 if (!(format == RATE_MCS_CCK_MSK) && is_sgi) 1997 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 1998 if (rate_n_flags & RATE_MCS_LDPC_MSK) 1999 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 2000 if (format == RATE_MCS_HT_MSK) { 2001 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2002 RATE_MCS_STBC_POS; 2003 rx_status->encoding = RX_ENC_HT; 2004 rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags); 2005 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2006 } else if (format == RATE_MCS_VHT_MSK) { 2007 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2008 RATE_MCS_STBC_POS; 2009 rx_status->nss = ((rate_n_flags & RATE_MCS_NSS_MSK) >> 2010 RATE_MCS_NSS_POS) + 1; 2011 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 2012 rx_status->encoding = RX_ENC_VHT; 2013 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2014 if (rate_n_flags & RATE_MCS_BF_MSK) 2015 rx_status->enc_flags |= RX_ENC_FLAG_BF; 2016 } else if (!(format == RATE_MCS_HE_MSK)) { 2017 int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 2018 rx_status->band); 2019 2020 if (WARN(rate < 0 || rate > 0xFF, 2021 "Invalid rate flags 0x%x, band %d,\n", 2022 rate_n_flags, rx_status->band)) { 2023 kfree_skb(skb); 2024 goto out; 2025 } 2026 rx_status->rate_idx = rate; 2027 } 2028 2029 /* management stuff on default queue */ 2030 if (!queue) { 2031 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 2032 ieee80211_is_probe_resp(hdr->frame_control)) && 2033 mvm->sched_scan_pass_all == 2034 SCHED_SCAN_PASS_ALL_ENABLED)) 2035 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 2036 2037 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 2038 ieee80211_is_probe_resp(hdr->frame_control))) 2039 rx_status->boottime_ns = ktime_get_boottime_ns(); 2040 } 2041 2042 if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) { 2043 kfree_skb(skb); 2044 goto out; 2045 } 2046 2047 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc)) 2048 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, 2049 sta); 2050 out: 2051 rcu_read_unlock(); 2052 } 2053 2054 void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi, 2055 struct iwl_rx_cmd_buffer *rxb, int queue) 2056 { 2057 struct ieee80211_rx_status *rx_status; 2058 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2059 struct iwl_rx_no_data *desc = (void *)pkt->data; 2060 u32 rate_n_flags = le32_to_cpu(desc->rate); 2061 u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time); 2062 u32 rssi = le32_to_cpu(desc->rssi); 2063 u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK; 2064 u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD; 2065 struct ieee80211_sta *sta = NULL; 2066 struct sk_buff *skb; 2067 u8 channel, energy_a, energy_b; 2068 u32 format; 2069 struct iwl_mvm_rx_phy_data phy_data = { 2070 .info_type = le32_get_bits(desc->phy_info[1], 2071 IWL_RX_PHY_DATA1_INFO_TYPE_MASK), 2072 .d0 = desc->phy_info[0], 2073 .d1 = desc->phy_info[1], 2074 }; 2075 bool is_sgi; 2076 2077 if (iwl_fw_lookup_notif_ver(mvm->fw, DATA_PATH_GROUP, 2078 RX_NO_DATA_NOTIF, 0) < 2) { 2079 IWL_DEBUG_DROP(mvm, "Got an old rate format. Old rate: 0x%x\n", 2080 rate_n_flags); 2081 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 2082 IWL_DEBUG_DROP(mvm, " Rate after conversion to the new format: 0x%x\n", 2083 rate_n_flags); 2084 } 2085 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 2086 2087 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*desc))) 2088 return; 2089 2090 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 2091 return; 2092 2093 energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS; 2094 energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS; 2095 channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS; 2096 2097 /* Dont use dev_alloc_skb(), we'll have enough headroom once 2098 * ieee80211_hdr pulled. 2099 */ 2100 skb = alloc_skb(128, GFP_ATOMIC); 2101 if (!skb) { 2102 IWL_ERR(mvm, "alloc_skb failed\n"); 2103 return; 2104 } 2105 2106 rx_status = IEEE80211_SKB_RXCB(skb); 2107 2108 /* 0-length PSDU */ 2109 rx_status->flag |= RX_FLAG_NO_PSDU; 2110 2111 switch (info_type) { 2112 case RX_NO_DATA_INFO_TYPE_NDP: 2113 rx_status->zero_length_psdu_type = 2114 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING; 2115 break; 2116 case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED: 2117 case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED: 2118 rx_status->zero_length_psdu_type = 2119 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED; 2120 break; 2121 default: 2122 rx_status->zero_length_psdu_type = 2123 IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR; 2124 break; 2125 } 2126 2127 /* This may be overridden by iwl_mvm_rx_he() to HE_RU */ 2128 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 2129 case RATE_MCS_CHAN_WIDTH_20: 2130 break; 2131 case RATE_MCS_CHAN_WIDTH_40: 2132 rx_status->bw = RATE_INFO_BW_40; 2133 break; 2134 case RATE_MCS_CHAN_WIDTH_80: 2135 rx_status->bw = RATE_INFO_BW_80; 2136 break; 2137 case RATE_MCS_CHAN_WIDTH_160: 2138 rx_status->bw = RATE_INFO_BW_160; 2139 break; 2140 } 2141 2142 if (format == RATE_MCS_HE_MSK) 2143 iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags, 2144 phy_info, queue); 2145 2146 iwl_mvm_decode_lsig(skb, &phy_data); 2147 2148 rx_status->device_timestamp = gp2_on_air_rise; 2149 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ : 2150 NL80211_BAND_2GHZ; 2151 rx_status->freq = ieee80211_channel_to_frequency(channel, 2152 rx_status->band); 2153 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a, 2154 energy_b); 2155 2156 rcu_read_lock(); 2157 2158 is_sgi = format == RATE_MCS_HE_MSK ? 2159 iwl_he_is_sgi(rate_n_flags) : 2160 rate_n_flags & RATE_MCS_SGI_MSK; 2161 2162 if (!(format == RATE_MCS_CCK_MSK) && is_sgi) 2163 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 2164 if (rate_n_flags & RATE_MCS_LDPC_MSK) 2165 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 2166 if (format == RATE_MCS_HT_MSK) { 2167 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2168 RATE_MCS_STBC_POS; 2169 rx_status->encoding = RX_ENC_HT; 2170 rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags); 2171 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2172 } else if (format == RATE_MCS_VHT_MSK) { 2173 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 2174 RATE_MCS_STBC_POS; 2175 rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK; 2176 rx_status->encoding = RX_ENC_VHT; 2177 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 2178 if (rate_n_flags & RATE_MCS_BF_MSK) 2179 rx_status->enc_flags |= RX_ENC_FLAG_BF; 2180 /* 2181 * take the nss from the rx_vec since the rate_n_flags has 2182 * only 2 bits for the nss which gives a max of 4 ss but 2183 * there may be up to 8 spatial streams 2184 */ 2185 rx_status->nss = 2186 le32_get_bits(desc->rx_vec[0], 2187 RX_NO_DATA_RX_VEC0_VHT_NSTS_MSK) + 1; 2188 } else if (format == RATE_MCS_HE_MSK) { 2189 rx_status->nss = 2190 le32_get_bits(desc->rx_vec[0], 2191 RX_NO_DATA_RX_VEC0_HE_NSTS_MSK) + 1; 2192 } else { 2193 int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 2194 rx_status->band); 2195 2196 if (WARN(rate < 0 || rate > 0xFF, 2197 "Invalid rate flags 0x%x, band %d,\n", 2198 rate_n_flags, rx_status->band)) { 2199 kfree_skb(skb); 2200 goto out; 2201 } 2202 rx_status->rate_idx = rate; 2203 } 2204 2205 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 2206 out: 2207 rcu_read_unlock(); 2208 } 2209 2210 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 2211 struct iwl_rx_cmd_buffer *rxb, int queue) 2212 { 2213 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2214 struct iwl_frame_release *release = (void *)pkt->data; 2215 2216 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release))) 2217 return; 2218 2219 iwl_mvm_release_frames_from_notif(mvm, napi, release->baid, 2220 le16_to_cpu(release->nssn), 2221 queue, 0); 2222 } 2223 2224 void iwl_mvm_rx_bar_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi, 2225 struct iwl_rx_cmd_buffer *rxb, int queue) 2226 { 2227 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2228 struct iwl_bar_frame_release *release = (void *)pkt->data; 2229 unsigned int baid = le32_get_bits(release->ba_info, 2230 IWL_BAR_FRAME_RELEASE_BAID_MASK); 2231 unsigned int nssn = le32_get_bits(release->ba_info, 2232 IWL_BAR_FRAME_RELEASE_NSSN_MASK); 2233 unsigned int sta_id = le32_get_bits(release->sta_tid, 2234 IWL_BAR_FRAME_RELEASE_STA_MASK); 2235 unsigned int tid = le32_get_bits(release->sta_tid, 2236 IWL_BAR_FRAME_RELEASE_TID_MASK); 2237 struct iwl_mvm_baid_data *baid_data; 2238 2239 if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release))) 2240 return; 2241 2242 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID || 2243 baid >= ARRAY_SIZE(mvm->baid_map))) 2244 return; 2245 2246 rcu_read_lock(); 2247 baid_data = rcu_dereference(mvm->baid_map[baid]); 2248 if (!baid_data) { 2249 IWL_DEBUG_RX(mvm, 2250 "Got valid BAID %d but not allocated, invalid BAR release!\n", 2251 baid); 2252 goto out; 2253 } 2254 2255 if (WARN(tid != baid_data->tid || sta_id != baid_data->sta_id, 2256 "baid 0x%x is mapped to sta:%d tid:%d, but BAR release received for sta:%d tid:%d\n", 2257 baid, baid_data->sta_id, baid_data->tid, sta_id, 2258 tid)) 2259 goto out; 2260 2261 iwl_mvm_release_frames_from_notif(mvm, napi, baid, nssn, queue, 0); 2262 out: 2263 rcu_read_unlock(); 2264 } 2265