linux/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
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   1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2/*
   3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
   4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5 * Copyright (C) 2015-2017 Intel Deutschland GmbH
   6 */
   7#include <linux/etherdevice.h>
   8#include <linux/skbuff.h>
   9#include "iwl-trans.h"
  10#include "mvm.h"
  11#include "fw-api.h"
  12
  13static void *iwl_mvm_skb_get_hdr(struct sk_buff *skb)
  14{
  15        struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
  16        u8 *data = skb->data;
  17
  18        /* Alignment concerns */
  19        BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) % 4);
  20        BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) % 4);
  21        BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) % 4);
  22        BUILD_BUG_ON(sizeof(struct ieee80211_vendor_radiotap) % 4);
  23
  24        if (rx_status->flag & RX_FLAG_RADIOTAP_HE)
  25                data += sizeof(struct ieee80211_radiotap_he);
  26        if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU)
  27                data += sizeof(struct ieee80211_radiotap_he_mu);
  28        if (rx_status->flag & RX_FLAG_RADIOTAP_LSIG)
  29                data += sizeof(struct ieee80211_radiotap_lsig);
  30        if (rx_status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
  31                struct ieee80211_vendor_radiotap *radiotap = (void *)data;
  32
  33                data += sizeof(*radiotap) + radiotap->len + radiotap->pad;
  34        }
  35
  36        return data;
  37}
  38
  39static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
  40                                   int queue, struct ieee80211_sta *sta)
  41{
  42        struct iwl_mvm_sta *mvmsta;
  43        struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb);
  44        struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
  45        struct iwl_mvm_key_pn *ptk_pn;
  46        int res;
  47        u8 tid, keyidx;
  48        u8 pn[IEEE80211_CCMP_PN_LEN];
  49        u8 *extiv;
  50
  51        /* do PN checking */
  52
  53        /* multicast and non-data only arrives on default queue */
  54        if (!ieee80211_is_data(hdr->frame_control) ||
  55            is_multicast_ether_addr(hdr->addr1))
  56                return 0;
  57
  58        /* do not check PN for open AP */
  59        if (!(stats->flag & RX_FLAG_DECRYPTED))
  60                return 0;
  61
  62        /*
  63         * avoid checking for default queue - we don't want to replicate
  64         * all the logic that's necessary for checking the PN on fragmented
  65         * frames, leave that to mac80211
  66         */
  67        if (queue == 0)
  68                return 0;
  69
  70        /* if we are here - this for sure is either CCMP or GCMP */
  71        if (IS_ERR_OR_NULL(sta)) {
  72                IWL_DEBUG_DROP(mvm,
  73                               "expected hw-decrypted unicast frame for station\n");
  74                return -1;
  75        }
  76
  77        mvmsta = iwl_mvm_sta_from_mac80211(sta);
  78
  79        extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
  80        keyidx = extiv[3] >> 6;
  81
  82        ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
  83        if (!ptk_pn)
  84                return -1;
  85
  86        if (ieee80211_is_data_qos(hdr->frame_control))
  87                tid = ieee80211_get_tid(hdr);
  88        else
  89                tid = 0;
  90
  91        /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
  92        if (tid >= IWL_MAX_TID_COUNT)
  93                return -1;
  94
  95        /* load pn */
  96        pn[0] = extiv[7];
  97        pn[1] = extiv[6];
  98        pn[2] = extiv[5];
  99        pn[3] = extiv[4];
 100        pn[4] = extiv[1];
 101        pn[5] = extiv[0];
 102
 103        res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN);
 104        if (res < 0)
 105                return -1;
 106        if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN))
 107                return -1;
 108
 109        memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
 110        stats->flag |= RX_FLAG_PN_VALIDATED;
 111
 112        return 0;
 113}
 114
 115/* iwl_mvm_create_skb Adds the rxb to a new skb */
 116static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
 117                              struct ieee80211_hdr *hdr, u16 len, u8 crypt_len,
 118                              struct iwl_rx_cmd_buffer *rxb)
 119{
 120        struct iwl_rx_packet *pkt = rxb_addr(rxb);
 121        struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
 122        unsigned int headlen, fraglen, pad_len = 0;
 123        unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 124
 125        if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
 126                len -= 2;
 127                pad_len = 2;
 128        }
 129
 130        /* If frame is small enough to fit in skb->head, pull it completely.
 131         * If not, only pull ieee80211_hdr (including crypto if present, and
 132         * an additional 8 bytes for SNAP/ethertype, see below) so that
 133         * splice() or TCP coalesce are more efficient.
 134         *
 135         * Since, in addition, ieee80211_data_to_8023() always pull in at
 136         * least 8 bytes (possibly more for mesh) we can do the same here
 137         * to save the cost of doing it later. That still doesn't pull in
 138         * the actual IP header since the typical case has a SNAP header.
 139         * If the latter changes (there are efforts in the standards group
 140         * to do so) we should revisit this and ieee80211_data_to_8023().
 141         */
 142        headlen = (len <= skb_tailroom(skb)) ? len :
 143                                               hdrlen + crypt_len + 8;
 144
 145        /* The firmware may align the packet to DWORD.
 146         * The padding is inserted after the IV.
 147         * After copying the header + IV skip the padding if
 148         * present before copying packet data.
 149         */
 150        hdrlen += crypt_len;
 151
 152        if (WARN_ONCE(headlen < hdrlen,
 153                      "invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n",
 154                      hdrlen, len, crypt_len)) {
 155                /*
 156                 * We warn and trace because we want to be able to see
 157                 * it in trace-cmd as well.
 158                 */
 159                IWL_DEBUG_RX(mvm,
 160                             "invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n",
 161                             hdrlen, len, crypt_len);
 162                return -EINVAL;
 163        }
 164
 165        skb_put_data(skb, hdr, hdrlen);
 166        skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
 167
 168        /*
 169         * If we did CHECKSUM_COMPLETE, the hardware only does it right for
 170         * certain cases and starts the checksum after the SNAP. Check if
 171         * this is the case - it's easier to just bail out to CHECKSUM_NONE
 172         * in the cases the hardware didn't handle, since it's rare to see
 173         * such packets, even though the hardware did calculate the checksum
 174         * in this case, just starting after the MAC header instead.
 175         */
 176        if (skb->ip_summed == CHECKSUM_COMPLETE) {
 177                struct {
 178                        u8 hdr[6];
 179                        __be16 type;
 180                } __packed *shdr = (void *)((u8 *)hdr + hdrlen + pad_len);
 181
 182                if (unlikely(headlen - hdrlen < sizeof(*shdr) ||
 183                             !ether_addr_equal(shdr->hdr, rfc1042_header) ||
 184                             (shdr->type != htons(ETH_P_IP) &&
 185                              shdr->type != htons(ETH_P_ARP) &&
 186                              shdr->type != htons(ETH_P_IPV6) &&
 187                              shdr->type != htons(ETH_P_8021Q) &&
 188                              shdr->type != htons(ETH_P_PAE) &&
 189                              shdr->type != htons(ETH_P_TDLS))))
 190                        skb->ip_summed = CHECKSUM_NONE;
 191        }
 192
 193        fraglen = len - headlen;
 194
 195        if (fraglen) {
 196                int offset = (void *)hdr + headlen + pad_len -
 197                             rxb_addr(rxb) + rxb_offset(rxb);
 198
 199                skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 200                                fraglen, rxb->truesize);
 201        }
 202
 203        return 0;
 204}
 205
 206static void iwl_mvm_add_rtap_sniffer_config(struct iwl_mvm *mvm,
 207                                            struct sk_buff *skb)
 208{
 209        struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
 210        struct ieee80211_vendor_radiotap *radiotap;
 211        const int size = sizeof(*radiotap) + sizeof(__le16);
 212
 213        if (!mvm->cur_aid)
 214                return;
 215
 216        /* ensure alignment */
 217        BUILD_BUG_ON((size + 2) % 4);
 218
 219        radiotap = skb_put(skb, size + 2);
 220        radiotap->align = 1;
 221        /* Intel OUI */
 222        radiotap->oui[0] = 0xf6;
 223        radiotap->oui[1] = 0x54;
 224        radiotap->oui[2] = 0x25;
 225        /* radiotap sniffer config sub-namespace */
 226        radiotap->subns = 1;
 227        radiotap->present = 0x1;
 228        radiotap->len = size - sizeof(*radiotap);
 229        radiotap->pad = 2;
 230
 231        /* fill the data now */
 232        memcpy(radiotap->data, &mvm->cur_aid, sizeof(mvm->cur_aid));
 233        /* and clear the padding */
 234        memset(radiotap->data + sizeof(__le16), 0, radiotap->pad);
 235
 236        rx_status->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
 237}
 238
 239/* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
 240static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
 241                                            struct napi_struct *napi,
 242                                            struct sk_buff *skb, int queue,
 243                                            struct ieee80211_sta *sta,
 244                                            bool csi)
 245{
 246        if (iwl_mvm_check_pn(mvm, skb, queue, sta))
 247                kfree_skb(skb);
 248        else
 249                ieee80211_rx_napi(mvm->hw, sta, skb, napi);
 250}
 251
 252static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 253                                        struct ieee80211_rx_status *rx_status,
 254                                        u32 rate_n_flags, int energy_a,
 255                                        int energy_b)
 256{
 257        int max_energy;
 258        u32 rate_flags = rate_n_flags;
 259
 260        energy_a = energy_a ? -energy_a : S8_MIN;
 261        energy_b = energy_b ? -energy_b : S8_MIN;
 262        max_energy = max(energy_a, energy_b);
 263
 264        IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
 265                        energy_a, energy_b, max_energy);
 266
 267        rx_status->signal = max_energy;
 268        rx_status->chains =
 269                (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
 270        rx_status->chain_signal[0] = energy_a;
 271        rx_status->chain_signal[1] = energy_b;
 272        rx_status->chain_signal[2] = S8_MIN;
 273}
 274
 275static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 276                                struct ieee80211_hdr *hdr,
 277                                struct iwl_rx_mpdu_desc *desc,
 278                                u32 status)
 279{
 280        struct iwl_mvm_sta *mvmsta;
 281        struct iwl_mvm_vif *mvmvif;
 282        u8 keyid;
 283        struct ieee80211_key_conf *key;
 284        u32 len = le16_to_cpu(desc->mpdu_len);
 285        const u8 *frame = (void *)hdr;
 286
 287        if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == IWL_RX_MPDU_STATUS_SEC_NONE)
 288                return 0;
 289
 290        /*
 291         * For non-beacon, we don't really care. But beacons may
 292         * be filtered out, and we thus need the firmware's replay
 293         * detection, otherwise beacons the firmware previously
 294         * filtered could be replayed, or something like that, and
 295         * it can filter a lot - though usually only if nothing has
 296         * changed.
 297         */
 298        if (!ieee80211_is_beacon(hdr->frame_control))
 299                return 0;
 300
 301        /* key mismatch - will also report !MIC_OK but we shouldn't count it */
 302        if (!(status & IWL_RX_MPDU_STATUS_KEY_VALID))
 303                return -1;
 304
 305        /* good cases */
 306        if (likely(status & IWL_RX_MPDU_STATUS_MIC_OK &&
 307                   !(status & IWL_RX_MPDU_STATUS_REPLAY_ERROR)))
 308                return 0;
 309
 310        if (!sta)
 311                return -1;
 312
 313        mvmsta = iwl_mvm_sta_from_mac80211(sta);
 314
 315        mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 316
 317        /*
 318         * both keys will have the same cipher and MIC length, use
 319         * whichever one is available
 320         */
 321        key = rcu_dereference(mvmvif->bcn_prot.keys[0]);
 322        if (!key) {
 323                key = rcu_dereference(mvmvif->bcn_prot.keys[1]);
 324                if (!key)
 325                        return -1;
 326        }
 327
 328        if (len < key->icv_len + IEEE80211_GMAC_PN_LEN + 2)
 329                return -1;
 330
 331        /* get the real key ID */
 332        keyid = frame[len - key->icv_len - IEEE80211_GMAC_PN_LEN - 2];
 333        /* and if that's the other key, look it up */
 334        if (keyid != key->keyidx) {
 335                /*
 336                 * shouldn't happen since firmware checked, but be safe
 337                 * in case the MIC length is wrong too, for example
 338                 */
 339                if (keyid != 6 && keyid != 7)
 340                        return -1;
 341                key = rcu_dereference(mvmvif->bcn_prot.keys[keyid - 6]);
 342                if (!key)
 343                        return -1;
 344        }
 345
 346        /* Report status to mac80211 */
 347        if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 348                ieee80211_key_mic_failure(key);
 349        else if (status & IWL_RX_MPDU_STATUS_REPLAY_ERROR)
 350                ieee80211_key_replay(key);
 351
 352        return -1;
 353}
 354
 355static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 356                             struct ieee80211_hdr *hdr,
 357                             struct ieee80211_rx_status *stats, u16 phy_info,
 358                             struct iwl_rx_mpdu_desc *desc,
 359                             u32 pkt_flags, int queue, u8 *crypt_len)
 360{
 361        u32 status = le32_to_cpu(desc->status);
 362
 363        /*
 364         * Drop UNKNOWN frames in aggregation, unless in monitor mode
 365         * (where we don't have the keys).
 366         * We limit this to aggregation because in TKIP this is a valid
 367         * scenario, since we may not have the (correct) TTAK (phase 1
 368         * key) in the firmware.
 369         */
 370        if (phy_info & IWL_RX_MPDU_PHY_AMPDU &&
 371            (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 372            IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on)
 373                return -1;
 374
 375        if (unlikely(ieee80211_is_mgmt(hdr->frame_control) &&
 376                     !ieee80211_has_protected(hdr->frame_control)))
 377                return iwl_mvm_rx_mgmt_prot(sta, hdr, desc, status);
 378
 379        if (!ieee80211_has_protected(hdr->frame_control) ||
 380            (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 381            IWL_RX_MPDU_STATUS_SEC_NONE)
 382                return 0;
 383
 384        /* TODO: handle packets encrypted with unknown alg */
 385
 386        switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
 387        case IWL_RX_MPDU_STATUS_SEC_CCM:
 388        case IWL_RX_MPDU_STATUS_SEC_GCM:
 389                BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
 390                /* alg is CCM: check MIC only */
 391                if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 392                        return -1;
 393
 394                stats->flag |= RX_FLAG_DECRYPTED;
 395                if (pkt_flags & FH_RSCSR_RADA_EN)
 396                        stats->flag |= RX_FLAG_MIC_STRIPPED;
 397                *crypt_len = IEEE80211_CCMP_HDR_LEN;
 398                return 0;
 399        case IWL_RX_MPDU_STATUS_SEC_TKIP:
 400                /* Don't drop the frame and decrypt it in SW */
 401                if (!fw_has_api(&mvm->fw->ucode_capa,
 402                                IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
 403                    !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
 404                        return 0;
 405
 406                if (mvm->trans->trans_cfg->gen2 &&
 407                    !(status & RX_MPDU_RES_STATUS_MIC_OK))
 408                        stats->flag |= RX_FLAG_MMIC_ERROR;
 409
 410                *crypt_len = IEEE80211_TKIP_IV_LEN;
 411                fallthrough;
 412        case IWL_RX_MPDU_STATUS_SEC_WEP:
 413                if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
 414                        return -1;
 415
 416                stats->flag |= RX_FLAG_DECRYPTED;
 417                if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 418                                IWL_RX_MPDU_STATUS_SEC_WEP)
 419                        *crypt_len = IEEE80211_WEP_IV_LEN;
 420
 421                if (pkt_flags & FH_RSCSR_RADA_EN) {
 422                        stats->flag |= RX_FLAG_ICV_STRIPPED;
 423                        if (mvm->trans->trans_cfg->gen2)
 424                                stats->flag |= RX_FLAG_MMIC_STRIPPED;
 425                }
 426
 427                return 0;
 428        case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
 429                if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 430                        return -1;
 431                stats->flag |= RX_FLAG_DECRYPTED;
 432                return 0;
 433        case RX_MPDU_RES_STATUS_SEC_CMAC_GMAC_ENC:
 434                break;
 435        default:
 436                /*
 437                 * Sometimes we can get frames that were not decrypted
 438                 * because the firmware didn't have the keys yet. This can
 439                 * happen after connection where we can get multicast frames
 440                 * before the GTK is installed.
 441                 * Silently drop those frames.
 442                 * Also drop un-decrypted frames in monitor mode.
 443                 */
 444                if (!is_multicast_ether_addr(hdr->addr1) &&
 445                    !mvm->monitor_on && net_ratelimit())
 446                        IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
 447        }
 448
 449        return 0;
 450}
 451
 452static void iwl_mvm_rx_csum(struct iwl_mvm *mvm,
 453                            struct ieee80211_sta *sta,
 454                            struct sk_buff *skb,
 455                            struct iwl_rx_packet *pkt)
 456{
 457        struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
 458
 459        if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
 460                if (pkt->len_n_flags & cpu_to_le32(FH_RSCSR_RPA_EN)) {
 461                        u16 hwsum = be16_to_cpu(desc->v3.raw_xsum);
 462
 463                        skb->ip_summed = CHECKSUM_COMPLETE;
 464                        skb->csum = csum_unfold(~(__force __sum16)hwsum);
 465                }
 466        } else {
 467                struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 468                struct iwl_mvm_vif *mvmvif;
 469                u16 flags = le16_to_cpu(desc->l3l4_flags);
 470                u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
 471                                  IWL_RX_L3_PROTO_POS);
 472
 473                mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 474
 475                if (mvmvif->features & NETIF_F_RXCSUM &&
 476                    flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
 477                    (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
 478                     l3_prot == IWL_RX_L3_TYPE_IPV6 ||
 479                     l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
 480                        skb->ip_summed = CHECKSUM_UNNECESSARY;
 481        }
 482}
 483
 484/*
 485 * returns true if a packet is a duplicate and should be dropped.
 486 * Updates AMSDU PN tracking info
 487 */
 488static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue,
 489                           struct ieee80211_rx_status *rx_status,
 490                           struct ieee80211_hdr *hdr,
 491                           struct iwl_rx_mpdu_desc *desc)
 492{
 493        struct iwl_mvm_sta *mvm_sta;
 494        struct iwl_mvm_rxq_dup_data *dup_data;
 495        u8 tid, sub_frame_idx;
 496
 497        if (WARN_ON(IS_ERR_OR_NULL(sta)))
 498                return false;
 499
 500        mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 501        dup_data = &mvm_sta->dup_data[queue];
 502
 503        /*
 504         * Drop duplicate 802.11 retransmissions
 505         * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
 506         */
 507        if (ieee80211_is_ctl(hdr->frame_control) ||
 508            ieee80211_is_qos_nullfunc(hdr->frame_control) ||
 509            is_multicast_ether_addr(hdr->addr1)) {
 510                rx_status->flag |= RX_FLAG_DUP_VALIDATED;
 511                return false;
 512        }
 513
 514        if (ieee80211_is_data_qos(hdr->frame_control))
 515                /* frame has qos control */
 516                tid = ieee80211_get_tid(hdr);
 517        else
 518                tid = IWL_MAX_TID_COUNT;
 519
 520        /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
 521        sub_frame_idx = desc->amsdu_info &
 522                IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
 523
 524        if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
 525                     dup_data->last_seq[tid] == hdr->seq_ctrl &&
 526                     dup_data->last_sub_frame[tid] >= sub_frame_idx))
 527                return true;
 528
 529        /* Allow same PN as the first subframe for following sub frames */
 530        if (dup_data->last_seq[tid] == hdr->seq_ctrl &&
 531            sub_frame_idx > dup_data->last_sub_frame[tid] &&
 532            desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU)
 533                rx_status->flag |= RX_FLAG_ALLOW_SAME_PN;
 534
 535        dup_data->last_seq[tid] = hdr->seq_ctrl;
 536        dup_data->last_sub_frame[tid] = sub_frame_idx;
 537
 538        rx_status->flag |= RX_FLAG_DUP_VALIDATED;
 539
 540        return false;
 541}
 542
 543/*
 544 * Returns true if sn2 - buffer_size < sn1 < sn2.
 545 * To be used only in order to compare reorder buffer head with NSSN.
 546 * We fully trust NSSN unless it is behind us due to reorder timeout.
 547 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
 548 */
 549static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
 550{
 551        return ieee80211_sn_less(sn1, sn2) &&
 552               !ieee80211_sn_less(sn1, sn2 - buffer_size);
 553}
 554
 555static void iwl_mvm_sync_nssn(struct iwl_mvm *mvm, u8 baid, u16 nssn)
 556{
 557        if (IWL_MVM_USE_NSSN_SYNC) {
 558                struct iwl_mvm_nssn_sync_data notif = {
 559                        .baid = baid,
 560                        .nssn = nssn,
 561                };
 562
 563                iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NSSN_SYNC, false,
 564                                                &notif, sizeof(notif));
 565        }
 566}
 567
 568#define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
 569
 570enum iwl_mvm_release_flags {
 571        IWL_MVM_RELEASE_SEND_RSS_SYNC = BIT(0),
 572        IWL_MVM_RELEASE_FROM_RSS_SYNC = BIT(1),
 573};
 574
 575static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
 576                                   struct ieee80211_sta *sta,
 577                                   struct napi_struct *napi,
 578                                   struct iwl_mvm_baid_data *baid_data,
 579                                   struct iwl_mvm_reorder_buffer *reorder_buf,
 580                                   u16 nssn, u32 flags)
 581{
 582        struct iwl_mvm_reorder_buf_entry *entries =
 583                &baid_data->entries[reorder_buf->queue *
 584                                    baid_data->entries_per_queue];
 585        u16 ssn = reorder_buf->head_sn;
 586
 587        lockdep_assert_held(&reorder_buf->lock);
 588
 589        /*
 590         * We keep the NSSN not too far behind, if we are sync'ing it and it
 591         * is more than 2048 ahead of us, it must be behind us. Discard it.
 592         * This can happen if the queue that hit the 0 / 2048 seqno was lagging
 593         * behind and this queue already processed packets. The next if
 594         * would have caught cases where this queue would have processed less
 595         * than 64 packets, but it may have processed more than 64 packets.
 596         */
 597        if ((flags & IWL_MVM_RELEASE_FROM_RSS_SYNC) &&
 598            ieee80211_sn_less(nssn, ssn))
 599                goto set_timer;
 600
 601        /* ignore nssn smaller than head sn - this can happen due to timeout */
 602        if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
 603                goto set_timer;
 604
 605        while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
 606                int index = ssn % reorder_buf->buf_size;
 607                struct sk_buff_head *skb_list = &entries[index].e.frames;
 608                struct sk_buff *skb;
 609
 610                ssn = ieee80211_sn_inc(ssn);
 611                if ((flags & IWL_MVM_RELEASE_SEND_RSS_SYNC) &&
 612                    (ssn == 2048 || ssn == 0))
 613                        iwl_mvm_sync_nssn(mvm, baid_data->baid, ssn);
 614
 615                /*
 616                 * Empty the list. Will have more than one frame for A-MSDU.
 617                 * Empty list is valid as well since nssn indicates frames were
 618                 * received.
 619                 */
 620                while ((skb = __skb_dequeue(skb_list))) {
 621                        iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
 622                                                        reorder_buf->queue,
 623                                                        sta, false);
 624                        reorder_buf->num_stored--;
 625                }
 626        }
 627        reorder_buf->head_sn = nssn;
 628
 629set_timer:
 630        if (reorder_buf->num_stored && !reorder_buf->removed) {
 631                u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
 632
 633                while (skb_queue_empty(&entries[index].e.frames))
 634                        index = (index + 1) % reorder_buf->buf_size;
 635                /* modify timer to match next frame's expiration time */
 636                mod_timer(&reorder_buf->reorder_timer,
 637                          entries[index].e.reorder_time + 1 +
 638                          RX_REORDER_BUF_TIMEOUT_MQ);
 639        } else {
 640                del_timer(&reorder_buf->reorder_timer);
 641        }
 642}
 643
 644void iwl_mvm_reorder_timer_expired(struct timer_list *t)
 645{
 646        struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
 647        struct iwl_mvm_baid_data *baid_data =
 648                iwl_mvm_baid_data_from_reorder_buf(buf);
 649        struct iwl_mvm_reorder_buf_entry *entries =
 650                &baid_data->entries[buf->queue * baid_data->entries_per_queue];
 651        int i;
 652        u16 sn = 0, index = 0;
 653        bool expired = false;
 654        bool cont = false;
 655
 656        spin_lock(&buf->lock);
 657
 658        if (!buf->num_stored || buf->removed) {
 659                spin_unlock(&buf->lock);
 660                return;
 661        }
 662
 663        for (i = 0; i < buf->buf_size ; i++) {
 664                index = (buf->head_sn + i) % buf->buf_size;
 665
 666                if (skb_queue_empty(&entries[index].e.frames)) {
 667                        /*
 668                         * If there is a hole and the next frame didn't expire
 669                         * we want to break and not advance SN
 670                         */
 671                        cont = false;
 672                        continue;
 673                }
 674                if (!cont &&
 675                    !time_after(jiffies, entries[index].e.reorder_time +
 676                                         RX_REORDER_BUF_TIMEOUT_MQ))
 677                        break;
 678
 679                expired = true;
 680                /* continue until next hole after this expired frames */
 681                cont = true;
 682                sn = ieee80211_sn_add(buf->head_sn, i + 1);
 683        }
 684
 685        if (expired) {
 686                struct ieee80211_sta *sta;
 687                struct iwl_mvm_sta *mvmsta;
 688                u8 sta_id = baid_data->sta_id;
 689
 690                rcu_read_lock();
 691                sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
 692                mvmsta = iwl_mvm_sta_from_mac80211(sta);
 693
 694                /* SN is set to the last expired frame + 1 */
 695                IWL_DEBUG_HT(buf->mvm,
 696                             "Releasing expired frames for sta %u, sn %d\n",
 697                             sta_id, sn);
 698                iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
 699                                                     sta, baid_data->tid);
 700                iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data,
 701                                       buf, sn, IWL_MVM_RELEASE_SEND_RSS_SYNC);
 702                rcu_read_unlock();
 703        } else {
 704                /*
 705                 * If no frame expired and there are stored frames, index is now
 706                 * pointing to the first unexpired frame - modify timer
 707                 * accordingly to this frame.
 708                 */
 709                mod_timer(&buf->reorder_timer,
 710                          entries[index].e.reorder_time +
 711                          1 + RX_REORDER_BUF_TIMEOUT_MQ);
 712        }
 713        spin_unlock(&buf->lock);
 714}
 715
 716static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
 717                           struct iwl_mvm_delba_data *data)
 718{
 719        struct iwl_mvm_baid_data *ba_data;
 720        struct ieee80211_sta *sta;
 721        struct iwl_mvm_reorder_buffer *reorder_buf;
 722        u8 baid = data->baid;
 723
 724        if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
 725                return;
 726
 727        rcu_read_lock();
 728
 729        ba_data = rcu_dereference(mvm->baid_map[baid]);
 730        if (WARN_ON_ONCE(!ba_data))
 731                goto out;
 732
 733        sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
 734        if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 735                goto out;
 736
 737        reorder_buf = &ba_data->reorder_buf[queue];
 738
 739        /* release all frames that are in the reorder buffer to the stack */
 740        spin_lock_bh(&reorder_buf->lock);
 741        iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
 742                               ieee80211_sn_add(reorder_buf->head_sn,
 743                                                reorder_buf->buf_size),
 744                               0);
 745        spin_unlock_bh(&reorder_buf->lock);
 746        del_timer_sync(&reorder_buf->reorder_timer);
 747
 748out:
 749        rcu_read_unlock();
 750}
 751
 752static void iwl_mvm_release_frames_from_notif(struct iwl_mvm *mvm,
 753                                              struct napi_struct *napi,
 754                                              u8 baid, u16 nssn, int queue,
 755                                              u32 flags)
 756{
 757        struct ieee80211_sta *sta;
 758        struct iwl_mvm_reorder_buffer *reorder_buf;
 759        struct iwl_mvm_baid_data *ba_data;
 760
 761        IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
 762                     baid, nssn);
 763
 764        if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID ||
 765                         baid >= ARRAY_SIZE(mvm->baid_map)))
 766                return;
 767
 768        rcu_read_lock();
 769
 770        ba_data = rcu_dereference(mvm->baid_map[baid]);
 771        if (WARN_ON_ONCE(!ba_data))
 772                goto out;
 773
 774        sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
 775        if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 776                goto out;
 777
 778        reorder_buf = &ba_data->reorder_buf[queue];
 779
 780        spin_lock_bh(&reorder_buf->lock);
 781        iwl_mvm_release_frames(mvm, sta, napi, ba_data,
 782                               reorder_buf, nssn, flags);
 783        spin_unlock_bh(&reorder_buf->lock);
 784
 785out:
 786        rcu_read_unlock();
 787}
 788
 789static void iwl_mvm_nssn_sync(struct iwl_mvm *mvm,
 790                              struct napi_struct *napi, int queue,
 791                              const struct iwl_mvm_nssn_sync_data *data)
 792{
 793        iwl_mvm_release_frames_from_notif(mvm, napi, data->baid,
 794                                          data->nssn, queue,
 795                                          IWL_MVM_RELEASE_FROM_RSS_SYNC);
 796}
 797
 798void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct napi_struct *napi,
 799                            struct iwl_rx_cmd_buffer *rxb, int queue)
 800{
 801        struct iwl_rx_packet *pkt = rxb_addr(rxb);
 802        struct iwl_rxq_sync_notification *notif;
 803        struct iwl_mvm_internal_rxq_notif *internal_notif;
 804        u32 len = iwl_rx_packet_payload_len(pkt);
 805
 806        notif = (void *)pkt->data;
 807        internal_notif = (void *)notif->payload;
 808
 809        if (WARN_ONCE(len < sizeof(*notif) + sizeof(*internal_notif),
 810                      "invalid notification size %d (%d)",
 811                      len, (int)(sizeof(*notif) + sizeof(*internal_notif))))
 812                return;
 813        len -= sizeof(*notif) + sizeof(*internal_notif);
 814
 815        if (internal_notif->sync &&
 816            mvm->queue_sync_cookie != internal_notif->cookie) {
 817                WARN_ONCE(1, "Received expired RX queue sync message\n");
 818                return;
 819        }
 820
 821        switch (internal_notif->type) {
 822        case IWL_MVM_RXQ_EMPTY:
 823                WARN_ONCE(len, "invalid empty notification size %d", len);
 824                break;
 825        case IWL_MVM_RXQ_NOTIF_DEL_BA:
 826                if (WARN_ONCE(len != sizeof(struct iwl_mvm_delba_data),
 827                              "invalid delba notification size %d (%d)",
 828                              len, (int)sizeof(struct iwl_mvm_delba_data)))
 829                        break;
 830                iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
 831                break;
 832        case IWL_MVM_RXQ_NSSN_SYNC:
 833                if (WARN_ONCE(len != sizeof(struct iwl_mvm_nssn_sync_data),
 834                              "invalid nssn sync notification size %d (%d)",
 835                              len, (int)sizeof(struct iwl_mvm_nssn_sync_data)))
 836                        break;
 837                iwl_mvm_nssn_sync(mvm, napi, queue,
 838                                  (void *)internal_notif->data);
 839                break;
 840        default:
 841                WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
 842        }
 843
 844        if (internal_notif->sync) {
 845                WARN_ONCE(!test_and_clear_bit(queue, &mvm->queue_sync_state),
 846                          "queue sync: queue %d responded a second time!\n",
 847                          queue);
 848                if (READ_ONCE(mvm->queue_sync_state) == 0)
 849                        wake_up(&mvm->rx_sync_waitq);
 850        }
 851}
 852
 853static void iwl_mvm_oldsn_workaround(struct iwl_mvm *mvm,
 854                                     struct ieee80211_sta *sta, int tid,
 855                                     struct iwl_mvm_reorder_buffer *buffer,
 856                                     u32 reorder, u32 gp2, int queue)
 857{
 858        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 859
 860        if (gp2 != buffer->consec_oldsn_ampdu_gp2) {
 861                /* we have a new (A-)MPDU ... */
 862
 863                /*
 864                 * reset counter to 0 if we didn't have any oldsn in
 865                 * the last A-MPDU (as detected by GP2 being identical)
 866                 */
 867                if (!buffer->consec_oldsn_prev_drop)
 868                        buffer->consec_oldsn_drops = 0;
 869
 870                /* either way, update our tracking state */
 871                buffer->consec_oldsn_ampdu_gp2 = gp2;
 872        } else if (buffer->consec_oldsn_prev_drop) {
 873                /*
 874                 * tracking state didn't change, and we had an old SN
 875                 * indication before - do nothing in this case, we
 876                 * already noted this one down and are waiting for the
 877                 * next A-MPDU (by GP2)
 878                 */
 879                return;
 880        }
 881
 882        /* return unless this MPDU has old SN */
 883        if (!(reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN))
 884                return;
 885
 886        /* update state */
 887        buffer->consec_oldsn_prev_drop = 1;
 888        buffer->consec_oldsn_drops++;
 889
 890        /* if limit is reached, send del BA and reset state */
 891        if (buffer->consec_oldsn_drops == IWL_MVM_AMPDU_CONSEC_DROPS_DELBA) {
 892                IWL_WARN(mvm,
 893                         "reached %d old SN frames from %pM on queue %d, stopping BA session on TID %d\n",
 894                         IWL_MVM_AMPDU_CONSEC_DROPS_DELBA,
 895                         sta->addr, queue, tid);
 896                ieee80211_stop_rx_ba_session(mvmsta->vif, BIT(tid), sta->addr);
 897                buffer->consec_oldsn_prev_drop = 0;
 898                buffer->consec_oldsn_drops = 0;
 899        }
 900}
 901
 902/*
 903 * Returns true if the MPDU was buffered\dropped, false if it should be passed
 904 * to upper layer.
 905 */
 906static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
 907                            struct napi_struct *napi,
 908                            int queue,
 909                            struct ieee80211_sta *sta,
 910                            struct sk_buff *skb,
 911                            struct iwl_rx_mpdu_desc *desc)
 912{
 913        struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
 914        struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb);
 915        struct iwl_mvm_sta *mvm_sta;
 916        struct iwl_mvm_baid_data *baid_data;
 917        struct iwl_mvm_reorder_buffer *buffer;
 918        struct sk_buff *tail;
 919        u32 reorder = le32_to_cpu(desc->reorder_data);
 920        bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
 921        bool last_subframe =
 922                desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
 923        u8 tid = ieee80211_get_tid(hdr);
 924        u8 sub_frame_idx = desc->amsdu_info &
 925                           IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
 926        struct iwl_mvm_reorder_buf_entry *entries;
 927        int index;
 928        u16 nssn, sn;
 929        u8 baid;
 930
 931        baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
 932                IWL_RX_MPDU_REORDER_BAID_SHIFT;
 933
 934        /*
 935         * This also covers the case of receiving a Block Ack Request
 936         * outside a BA session; we'll pass it to mac80211 and that
 937         * then sends a delBA action frame.
 938         * This also covers pure monitor mode, in which case we won't
 939         * have any BA sessions.
 940         */
 941        if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
 942                return false;
 943
 944        /* no sta yet */
 945        if (WARN_ONCE(IS_ERR_OR_NULL(sta),
 946                      "Got valid BAID without a valid station assigned\n"))
 947                return false;
 948
 949        mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 950
 951        /* not a data packet or a bar */
 952        if (!ieee80211_is_back_req(hdr->frame_control) &&
 953            (!ieee80211_is_data_qos(hdr->frame_control) ||
 954             is_multicast_ether_addr(hdr->addr1)))
 955                return false;
 956
 957        if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
 958                return false;
 959
 960        baid_data = rcu_dereference(mvm->baid_map[baid]);
 961        if (!baid_data) {
 962                IWL_DEBUG_RX(mvm,
 963                             "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
 964                              baid, reorder);
 965                return false;
 966        }
 967
 968        if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
 969                 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
 970                 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
 971                 tid))
 972                return false;
 973
 974        nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
 975        sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
 976                IWL_RX_MPDU_REORDER_SN_SHIFT;
 977
 978        buffer = &baid_data->reorder_buf[queue];
 979        entries = &baid_data->entries[queue * baid_data->entries_per_queue];
 980
 981        spin_lock_bh(&buffer->lock);
 982
 983        if (!buffer->valid) {
 984                if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
 985                        spin_unlock_bh(&buffer->lock);
 986                        return false;
 987                }
 988                buffer->valid = true;
 989        }
 990
 991        if (ieee80211_is_back_req(hdr->frame_control)) {
 992                iwl_mvm_release_frames(mvm, sta, napi, baid_data,
 993                                       buffer, nssn, 0);
 994                goto drop;
 995        }
 996
 997        /*
 998         * If there was a significant jump in the nssn - adjust.
 999         * If the SN is smaller than the NSSN it might need to first go into
1000         * the reorder buffer, in which case we just release up to it and the
1001         * rest of the function will take care of storing it and releasing up to
1002         * the nssn.
1003         * This should not happen. This queue has been lagging and it should
1004         * have been updated by a IWL_MVM_RXQ_NSSN_SYNC notification. Be nice
1005         * and update the other queues.
1006         */
1007        if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
1008                                buffer->buf_size) ||
1009            !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
1010                u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
1011
1012                iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
1013                                       min_sn, IWL_MVM_RELEASE_SEND_RSS_SYNC);
1014        }
1015
1016        iwl_mvm_oldsn_workaround(mvm, sta, tid, buffer, reorder,
1017                                 rx_status->device_timestamp, queue);
1018
1019        /* drop any oudated packets */
1020        if (ieee80211_sn_less(sn, buffer->head_sn))
1021                goto drop;
1022
1023        /* release immediately if allowed by nssn and no stored frames */
1024        if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
1025                if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
1026                                       buffer->buf_size) &&
1027                   (!amsdu || last_subframe)) {
1028                        /*
1029                         * If we crossed the 2048 or 0 SN, notify all the
1030                         * queues. This is done in order to avoid having a
1031                         * head_sn that lags behind for too long. When that
1032                         * happens, we can get to a situation where the head_sn
1033                         * is within the interval [nssn - buf_size : nssn]
1034                         * which will make us think that the nssn is a packet
1035                         * that we already freed because of the reordering
1036                         * buffer and we will ignore it. So maintain the
1037                         * head_sn somewhat updated across all the queues:
1038                         * when it crosses 0 and 2048.
1039                         */
1040                        if (sn == 2048 || sn == 0)
1041                                iwl_mvm_sync_nssn(mvm, baid, sn);
1042                        buffer->head_sn = nssn;
1043                }
1044                /* No need to update AMSDU last SN - we are moving the head */
1045                spin_unlock_bh(&buffer->lock);
1046                return false;
1047        }
1048
1049        /*
1050         * release immediately if there are no stored frames, and the sn is
1051         * equal to the head.
1052         * This can happen due to reorder timer, where NSSN is behind head_sn.
1053         * When we released everything, and we got the next frame in the
1054         * sequence, according to the NSSN we can't release immediately,
1055         * while technically there is no hole and we can move forward.
1056         */
1057        if (!buffer->num_stored && sn == buffer->head_sn) {
1058                if (!amsdu || last_subframe) {
1059                        if (sn == 2048 || sn == 0)
1060                                iwl_mvm_sync_nssn(mvm, baid, sn);
1061                        buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
1062                }
1063                /* No need to update AMSDU last SN - we are moving the head */
1064                spin_unlock_bh(&buffer->lock);
1065                return false;
1066        }
1067
1068        index = sn % buffer->buf_size;
1069
1070        /*
1071         * Check if we already stored this frame
1072         * As AMSDU is either received or not as whole, logic is simple:
1073         * If we have frames in that position in the buffer and the last frame
1074         * originated from AMSDU had a different SN then it is a retransmission.
1075         * If it is the same SN then if the subframe index is incrementing it
1076         * is the same AMSDU - otherwise it is a retransmission.
1077         */
1078        tail = skb_peek_tail(&entries[index].e.frames);
1079        if (tail && !amsdu)
1080                goto drop;
1081        else if (tail && (sn != buffer->last_amsdu ||
1082                          buffer->last_sub_index >= sub_frame_idx))
1083                goto drop;
1084
1085        /* put in reorder buffer */
1086        __skb_queue_tail(&entries[index].e.frames, skb);
1087        buffer->num_stored++;
1088        entries[index].e.reorder_time = jiffies;
1089
1090        if (amsdu) {
1091                buffer->last_amsdu = sn;
1092                buffer->last_sub_index = sub_frame_idx;
1093        }
1094
1095        /*
1096         * We cannot trust NSSN for AMSDU sub-frames that are not the last.
1097         * The reason is that NSSN advances on the first sub-frame, and may
1098         * cause the reorder buffer to advance before all the sub-frames arrive.
1099         * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
1100         * SN 1. NSSN for first sub frame will be 3 with the result of driver
1101         * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
1102         * already ahead and it will be dropped.
1103         * If the last sub-frame is not on this queue - we will get frame
1104         * release notification with up to date NSSN.
1105         */
1106        if (!amsdu || last_subframe)
1107                iwl_mvm_release_frames(mvm, sta, napi, baid_data,
1108                                       buffer, nssn,
1109                                       IWL_MVM_RELEASE_SEND_RSS_SYNC);
1110
1111        spin_unlock_bh(&buffer->lock);
1112        return true;
1113
1114drop:
1115        kfree_skb(skb);
1116        spin_unlock_bh(&buffer->lock);
1117        return true;
1118}
1119
1120static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
1121                                    u32 reorder_data, u8 baid)
1122{
1123        unsigned long now = jiffies;
1124        unsigned long timeout;
1125        struct iwl_mvm_baid_data *data;
1126
1127        rcu_read_lock();
1128
1129        data = rcu_dereference(mvm->baid_map[baid]);
1130        if (!data) {
1131                IWL_DEBUG_RX(mvm,
1132                             "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
1133                              baid, reorder_data);
1134                goto out;
1135        }
1136
1137        if (!data->timeout)
1138                goto out;
1139
1140        timeout = data->timeout;
1141        /*
1142         * Do not update last rx all the time to avoid cache bouncing
1143         * between the rx queues.
1144         * Update it every timeout. Worst case is the session will
1145         * expire after ~ 2 * timeout, which doesn't matter that much.
1146         */
1147        if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
1148                /* Update is atomic */
1149                data->last_rx = now;
1150
1151out:
1152        rcu_read_unlock();
1153}
1154
1155static void iwl_mvm_flip_address(u8 *addr)
1156{
1157        int i;
1158        u8 mac_addr[ETH_ALEN];
1159
1160        for (i = 0; i < ETH_ALEN; i++)
1161                mac_addr[i] = addr[ETH_ALEN - i - 1];
1162        ether_addr_copy(addr, mac_addr);
1163}
1164
1165struct iwl_mvm_rx_phy_data {
1166        enum iwl_rx_phy_info_type info_type;
1167        __le32 d0, d1, d2, d3;
1168        __le16 d4;
1169};
1170
1171static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm,
1172                                     struct iwl_mvm_rx_phy_data *phy_data,
1173                                     u32 rate_n_flags,
1174                                     struct ieee80211_radiotap_he_mu *he_mu)
1175{
1176        u32 phy_data2 = le32_to_cpu(phy_data->d2);
1177        u32 phy_data3 = le32_to_cpu(phy_data->d3);
1178        u16 phy_data4 = le16_to_cpu(phy_data->d4);
1179
1180        if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) {
1181                he_mu->flags1 |=
1182                        cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN |
1183                                    IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN);
1184
1185                he_mu->flags1 |=
1186                        le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU,
1187                                                   phy_data4),
1188                                         IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU);
1189
1190                he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0,
1191                                             phy_data2);
1192                he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1,
1193                                             phy_data3);
1194                he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2,
1195                                             phy_data2);
1196                he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3,
1197                                             phy_data3);
1198        }
1199
1200        if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) &&
1201            (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) != RATE_MCS_CHAN_WIDTH_20) {
1202                he_mu->flags1 |=
1203                        cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN |
1204                                    IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN);
1205
1206                he_mu->flags2 |=
1207                        le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU,
1208                                                   phy_data4),
1209                                         IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU);
1210
1211                he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0,
1212                                             phy_data2);
1213                he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1,
1214                                             phy_data3);
1215                he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2,
1216                                             phy_data2);
1217                he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3,
1218                                             phy_data3);
1219        }
1220}
1221
1222static void
1223iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data,
1224                               u32 rate_n_flags,
1225                               struct ieee80211_radiotap_he *he,
1226                               struct ieee80211_radiotap_he_mu *he_mu,
1227                               struct ieee80211_rx_status *rx_status)
1228{
1229        /*
1230         * Unfortunately, we have to leave the mac80211 data
1231         * incorrect for the case that we receive an HE-MU
1232         * transmission and *don't* have the HE phy data (due
1233         * to the bits being used for TSF). This shouldn't
1234         * happen though as management frames where we need
1235         * the TSF/timers are not be transmitted in HE-MU.
1236         */
1237        u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK);
1238        u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK;
1239        u8 offs = 0;
1240
1241        rx_status->bw = RATE_INFO_BW_HE_RU;
1242
1243        he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
1244
1245        switch (ru) {
1246        case 0 ... 36:
1247                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
1248                offs = ru;
1249                break;
1250        case 37 ... 52:
1251                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
1252                offs = ru - 37;
1253                break;
1254        case 53 ... 60:
1255                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
1256                offs = ru - 53;
1257                break;
1258        case 61 ... 64:
1259                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
1260                offs = ru - 61;
1261                break;
1262        case 65 ... 66:
1263                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
1264                offs = ru - 65;
1265                break;
1266        case 67:
1267                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
1268                break;
1269        case 68:
1270                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
1271                break;
1272        }
1273        he->data2 |= le16_encode_bits(offs,
1274                                      IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
1275        he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN |
1276                                 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN);
1277        if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80))
1278                he->data2 |=
1279                        cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC);
1280
1281#define CHECK_BW(bw) \
1282        BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \
1283                     RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS); \
1284        BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_ ## bw ## MHZ != \
1285                     RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS)
1286        CHECK_BW(20);
1287        CHECK_BW(40);
1288        CHECK_BW(80);
1289        CHECK_BW(160);
1290
1291        if (he_mu)
1292                he_mu->flags2 |=
1293                        le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK,
1294                                                   rate_n_flags),
1295                                         IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW);
1296        else if (he_type == RATE_MCS_HE_TYPE_TRIG)
1297                he->data6 |=
1298                        cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_KNOWN) |
1299                        le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK,
1300                                                   rate_n_flags),
1301                                         IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW);
1302}
1303
1304static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm,
1305                                       struct iwl_mvm_rx_phy_data *phy_data,
1306                                       struct ieee80211_radiotap_he *he,
1307                                       struct ieee80211_radiotap_he_mu *he_mu,
1308                                       struct ieee80211_rx_status *rx_status,
1309                                       u32 rate_n_flags, int queue)
1310{
1311        switch (phy_data->info_type) {
1312        case IWL_RX_PHY_INFO_TYPE_NONE:
1313        case IWL_RX_PHY_INFO_TYPE_CCK:
1314        case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY:
1315        case IWL_RX_PHY_INFO_TYPE_HT:
1316        case IWL_RX_PHY_INFO_TYPE_VHT_SU:
1317        case IWL_RX_PHY_INFO_TYPE_VHT_MU:
1318                return;
1319        case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT:
1320                he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN |
1321                                         IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN |
1322                                         IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN |
1323                                         IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN);
1324                he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1325                                                            IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1),
1326                                              IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1);
1327                he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1328                                                            IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2),
1329                                              IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2);
1330                he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1331                                                            IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3),
1332                                              IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3);
1333                he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1334                                                            IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4),
1335                                              IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4);
1336                fallthrough;
1337        case IWL_RX_PHY_INFO_TYPE_HE_SU:
1338        case IWL_RX_PHY_INFO_TYPE_HE_MU:
1339        case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1340        case IWL_RX_PHY_INFO_TYPE_HE_TB:
1341                /* HE common */
1342                he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN |
1343                                         IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN |
1344                                         IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN);
1345                he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN |
1346                                         IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN |
1347                                         IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN |
1348                                         IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN);
1349                he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1350                                                            IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK),
1351                                              IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR);
1352                if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB &&
1353                    phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) {
1354                        he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN);
1355                        he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1356                                                            IWL_RX_PHY_DATA0_HE_UPLINK),
1357                                                      IEEE80211_RADIOTAP_HE_DATA3_UL_DL);
1358                }
1359                he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1360                                                            IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM),
1361                                              IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG);
1362                he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1363                                                            IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK),
1364                                              IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD);
1365                he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1366                                                            IWL_RX_PHY_DATA0_HE_PE_DISAMBIG),
1367                                              IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG);
1368                he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1,
1369                                                            IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK),
1370                                              IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS);
1371                he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1372                                                            IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK),
1373                                              IEEE80211_RADIOTAP_HE_DATA6_TXOP);
1374                he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1375                                                            IWL_RX_PHY_DATA0_HE_DOPPLER),
1376                                              IEEE80211_RADIOTAP_HE_DATA6_DOPPLER);
1377                break;
1378        }
1379
1380        switch (phy_data->info_type) {
1381        case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1382        case IWL_RX_PHY_INFO_TYPE_HE_MU:
1383        case IWL_RX_PHY_INFO_TYPE_HE_SU:
1384                he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN);
1385                he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1386                                                            IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK),
1387                                              IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE);
1388                break;
1389        default:
1390                /* nothing here */
1391                break;
1392        }
1393
1394        switch (phy_data->info_type) {
1395        case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1396                he_mu->flags1 |=
1397                        le16_encode_bits(le16_get_bits(phy_data->d4,
1398                                                       IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM),
1399                                         IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM);
1400                he_mu->flags1 |=
1401                        le16_encode_bits(le16_get_bits(phy_data->d4,
1402                                                       IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK),
1403                                         IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS);
1404                he_mu->flags2 |=
1405                        le16_encode_bits(le16_get_bits(phy_data->d4,
1406                                                       IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK),
1407                                         IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW);
1408                iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu);
1409                fallthrough;
1410        case IWL_RX_PHY_INFO_TYPE_HE_MU:
1411                he_mu->flags2 |=
1412                        le16_encode_bits(le32_get_bits(phy_data->d1,
1413                                                       IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK),
1414                                         IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS);
1415                he_mu->flags2 |=
1416                        le16_encode_bits(le32_get_bits(phy_data->d1,
1417                                                       IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION),
1418                                         IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP);
1419                fallthrough;
1420        case IWL_RX_PHY_INFO_TYPE_HE_TB:
1421        case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT:
1422                iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags,
1423                                               he, he_mu, rx_status);
1424                break;
1425        case IWL_RX_PHY_INFO_TYPE_HE_SU:
1426                he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN);
1427                he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1428                                                            IWL_RX_PHY_DATA0_HE_BEAM_CHNG),
1429                                              IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE);
1430                break;
1431        default:
1432                /* nothing */
1433                break;
1434        }
1435}
1436
1437static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb,
1438                          struct iwl_mvm_rx_phy_data *phy_data,
1439                          u32 rate_n_flags, u16 phy_info, int queue)
1440{
1441        struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1442        struct ieee80211_radiotap_he *he = NULL;
1443        struct ieee80211_radiotap_he_mu *he_mu = NULL;
1444        u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK;
1445        u8 stbc, ltf;
1446        static const struct ieee80211_radiotap_he known = {
1447                .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
1448                                     IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
1449                                     IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN |
1450                                     IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN),
1451                .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN |
1452                                     IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN),
1453        };
1454        static const struct ieee80211_radiotap_he_mu mu_known = {
1455                .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN |
1456                                      IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN |
1457                                      IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN |
1458                                      IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN),
1459                .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN |
1460                                      IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN),
1461        };
1462
1463        he = skb_put_data(skb, &known, sizeof(known));
1464        rx_status->flag |= RX_FLAG_RADIOTAP_HE;
1465
1466        if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU ||
1467            phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) {
1468                he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known));
1469                rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU;
1470        }
1471
1472        /* report the AMPDU-EOF bit on single frames */
1473        if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1474                rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
1475                rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
1476                if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF))
1477                        rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT;
1478        }
1479
1480        if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD)
1481                iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status,
1482                                           rate_n_flags, queue);
1483
1484        /* update aggregation data for monitor sake on default queue */
1485        if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) &&
1486            (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1487                bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
1488
1489                /* toggle is switched whenever new aggregation starts */
1490                if (toggle_bit != mvm->ampdu_toggle) {
1491                        rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
1492                        if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF))
1493                                rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT;
1494                }
1495        }
1496
1497        if (he_type == RATE_MCS_HE_TYPE_EXT_SU &&
1498            rate_n_flags & RATE_MCS_HE_106T_MSK) {
1499                rx_status->bw = RATE_INFO_BW_HE_RU;
1500                rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
1501        }
1502
1503        /* actually data is filled in mac80211 */
1504        if (he_type == RATE_MCS_HE_TYPE_SU ||
1505            he_type == RATE_MCS_HE_TYPE_EXT_SU)
1506                he->data1 |=
1507                        cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
1508
1509        stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS;
1510        rx_status->nss =
1511                ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1512                                        RATE_VHT_MCS_NSS_POS) + 1;
1513        rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1514        rx_status->encoding = RX_ENC_HE;
1515        rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1516        if (rate_n_flags & RATE_MCS_BF_MSK)
1517                rx_status->enc_flags |= RX_ENC_FLAG_BF;
1518
1519        rx_status->he_dcm =
1520                !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK);
1521
1522#define CHECK_TYPE(F)                                                   \
1523        BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F !=        \
1524                     (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS))
1525
1526        CHECK_TYPE(SU);
1527        CHECK_TYPE(EXT_SU);
1528        CHECK_TYPE(MU);
1529        CHECK_TYPE(TRIG);
1530
1531        he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS);
1532
1533        if (rate_n_flags & RATE_MCS_BF_MSK)
1534                he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF);
1535
1536        switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >>
1537                RATE_MCS_HE_GI_LTF_POS) {
1538        case 0:
1539                if (he_type == RATE_MCS_HE_TYPE_TRIG)
1540                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1541                else
1542                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1543                if (he_type == RATE_MCS_HE_TYPE_MU)
1544                        ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1545                else
1546                        ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X;
1547                break;
1548        case 1:
1549                if (he_type == RATE_MCS_HE_TYPE_TRIG)
1550                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1551                else
1552                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1553                ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X;
1554                break;
1555        case 2:
1556                if (he_type == RATE_MCS_HE_TYPE_TRIG) {
1557                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2;
1558                        ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1559                } else {
1560                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1561                        ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X;
1562                }
1563                break;
1564        case 3:
1565                if ((he_type == RATE_MCS_HE_TYPE_SU ||
1566                     he_type == RATE_MCS_HE_TYPE_EXT_SU) &&
1567                    rate_n_flags & RATE_MCS_SGI_MSK)
1568                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1569                else
1570                        rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2;
1571                ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1572                break;
1573        }
1574
1575        he->data5 |= le16_encode_bits(ltf,
1576                                      IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE);
1577}
1578
1579static void iwl_mvm_decode_lsig(struct sk_buff *skb,
1580                                struct iwl_mvm_rx_phy_data *phy_data)
1581{
1582        struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1583        struct ieee80211_radiotap_lsig *lsig;
1584
1585        switch (phy_data->info_type) {
1586        case IWL_RX_PHY_INFO_TYPE_HT:
1587        case IWL_RX_PHY_INFO_TYPE_VHT_SU:
1588        case IWL_RX_PHY_INFO_TYPE_VHT_MU:
1589        case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT:
1590        case IWL_RX_PHY_INFO_TYPE_HE_SU:
1591        case IWL_RX_PHY_INFO_TYPE_HE_MU:
1592        case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1593        case IWL_RX_PHY_INFO_TYPE_HE_TB:
1594                lsig = skb_put(skb, sizeof(*lsig));
1595                lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN);
1596                lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1,
1597                                                             IWL_RX_PHY_DATA1_LSIG_LEN_MASK),
1598                                               IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH);
1599                rx_status->flag |= RX_FLAG_RADIOTAP_LSIG;
1600                break;
1601        default:
1602                break;
1603        }
1604}
1605
1606static inline u8 iwl_mvm_nl80211_band_from_rx_msdu(u8 phy_band)
1607{
1608        switch (phy_band) {
1609        case PHY_BAND_24:
1610                return NL80211_BAND_2GHZ;
1611        case PHY_BAND_5:
1612                return NL80211_BAND_5GHZ;
1613        case PHY_BAND_6:
1614                return NL80211_BAND_6GHZ;
1615        default:
1616                WARN_ONCE(1, "Unsupported phy band (%u)\n", phy_band);
1617                return NL80211_BAND_5GHZ;
1618        }
1619}
1620
1621struct iwl_rx_sta_csa {
1622        bool all_sta_unblocked;
1623        struct ieee80211_vif *vif;
1624};
1625
1626static void iwl_mvm_rx_get_sta_block_tx(void *data, struct ieee80211_sta *sta)
1627{
1628        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1629        struct iwl_rx_sta_csa *rx_sta_csa = data;
1630
1631        if (mvmsta->vif != rx_sta_csa->vif)
1632                return;
1633
1634        if (mvmsta->disable_tx)
1635                rx_sta_csa->all_sta_unblocked = false;
1636}
1637
1638void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
1639                        struct iwl_rx_cmd_buffer *rxb, int queue)
1640{
1641        struct ieee80211_rx_status *rx_status;
1642        struct iwl_rx_packet *pkt = rxb_addr(rxb);
1643        struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
1644        struct ieee80211_hdr *hdr;
1645        u32 len;
1646        u32 pkt_len = iwl_rx_packet_payload_len(pkt);
1647        u32 rate_n_flags, gp2_on_air_rise;
1648        u16 phy_info;
1649        struct ieee80211_sta *sta = NULL;
1650        struct sk_buff *skb;
1651        u8 crypt_len = 0, channel, energy_a, energy_b;
1652        size_t desc_size;
1653        struct iwl_mvm_rx_phy_data phy_data = {
1654                .info_type = IWL_RX_PHY_INFO_TYPE_NONE,
1655        };
1656        bool csi = false;
1657
1658        if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
1659                return;
1660
1661        if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1662                desc_size = sizeof(*desc);
1663        else
1664                desc_size = IWL_RX_DESC_SIZE_V1;
1665
1666        if (unlikely(pkt_len < desc_size)) {
1667                IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
1668                return;
1669        }
1670
1671        if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
1672                rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags);
1673                channel = desc->v3.channel;
1674                gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise);
1675                energy_a = desc->v3.energy_a;
1676                energy_b = desc->v3.energy_b;
1677
1678                phy_data.d0 = desc->v3.phy_data0;
1679                phy_data.d1 = desc->v3.phy_data1;
1680                phy_data.d2 = desc->v3.phy_data2;
1681                phy_data.d3 = desc->v3.phy_data3;
1682        } else {
1683                rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags);
1684                channel = desc->v1.channel;
1685                gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise);
1686                energy_a = desc->v1.energy_a;
1687                energy_b = desc->v1.energy_b;
1688
1689                phy_data.d0 = desc->v1.phy_data0;
1690                phy_data.d1 = desc->v1.phy_data1;
1691                phy_data.d2 = desc->v1.phy_data2;
1692                phy_data.d3 = desc->v1.phy_data3;
1693        }
1694
1695        len = le16_to_cpu(desc->mpdu_len);
1696
1697        if (unlikely(len + desc_size > pkt_len)) {
1698                IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
1699                return;
1700        }
1701
1702        phy_info = le16_to_cpu(desc->phy_info);
1703        phy_data.d4 = desc->phy_data4;
1704
1705        if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD)
1706                phy_data.info_type =
1707                        le32_get_bits(phy_data.d1,
1708                                      IWL_RX_PHY_DATA1_INFO_TYPE_MASK);
1709
1710        hdr = (void *)(pkt->data + desc_size);
1711        /* Dont use dev_alloc_skb(), we'll have enough headroom once
1712         * ieee80211_hdr pulled.
1713         */
1714        skb = alloc_skb(128, GFP_ATOMIC);
1715        if (!skb) {
1716                IWL_ERR(mvm, "alloc_skb failed\n");
1717                return;
1718        }
1719
1720        if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
1721                /*
1722                 * If the device inserted padding it means that (it thought)
1723                 * the 802.11 header wasn't a multiple of 4 bytes long. In
1724                 * this case, reserve two bytes at the start of the SKB to
1725                 * align the payload properly in case we end up copying it.
1726                 */
1727                skb_reserve(skb, 2);
1728        }
1729
1730        rx_status = IEEE80211_SKB_RXCB(skb);
1731
1732        /* This may be overridden by iwl_mvm_rx_he() to HE_RU */
1733        switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1734        case RATE_MCS_CHAN_WIDTH_20:
1735                break;
1736        case RATE_MCS_CHAN_WIDTH_40:
1737                rx_status->bw = RATE_INFO_BW_40;
1738                break;
1739        case RATE_MCS_CHAN_WIDTH_80:
1740                rx_status->bw = RATE_INFO_BW_80;
1741                break;
1742        case RATE_MCS_CHAN_WIDTH_160:
1743                rx_status->bw = RATE_INFO_BW_160;
1744                break;
1745        }
1746
1747        if (rate_n_flags & RATE_MCS_HE_MSK)
1748                iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags,
1749                              phy_info, queue);
1750
1751        iwl_mvm_decode_lsig(skb, &phy_data);
1752
1753        /*
1754         * Keep packets with CRC errors (and with overrun) for monitor mode
1755         * (otherwise the firmware discards them) but mark them as bad.
1756         */
1757        if (!(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_CRC_OK)) ||
1758            !(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
1759                IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
1760                             le32_to_cpu(desc->status));
1761                rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
1762        }
1763        /* set the preamble flag if appropriate */
1764        if (rate_n_flags & RATE_MCS_CCK_MSK &&
1765            phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
1766                rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1767
1768        if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
1769                u64 tsf_on_air_rise;
1770
1771                if (mvm->trans->trans_cfg->device_family >=
1772                    IWL_DEVICE_FAMILY_AX210)
1773                        tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise);
1774                else
1775                        tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise);
1776
1777                rx_status->mactime = tsf_on_air_rise;
1778                /* TSF as indicated by the firmware is at INA time */
1779                rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
1780        }
1781
1782        rx_status->device_timestamp = gp2_on_air_rise;
1783        if (iwl_mvm_is_band_in_rx_supported(mvm)) {
1784                u8 band = BAND_IN_RX_STATUS(desc->mac_phy_idx);
1785
1786                rx_status->band = iwl_mvm_nl80211_band_from_rx_msdu(band);
1787        } else {
1788                rx_status->band = channel > 14 ? NL80211_BAND_5GHZ :
1789                        NL80211_BAND_2GHZ;
1790        }
1791        rx_status->freq = ieee80211_channel_to_frequency(channel,
1792                                                         rx_status->band);
1793        iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a,
1794                                    energy_b);
1795
1796        /* update aggregation data for monitor sake on default queue */
1797        if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1798                bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
1799
1800                rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
1801                /*
1802                 * Toggle is switched whenever new aggregation starts. Make
1803                 * sure ampdu_reference is never 0 so we can later use it to
1804                 * see if the frame was really part of an A-MPDU or not.
1805                 */
1806                if (toggle_bit != mvm->ampdu_toggle) {
1807                        mvm->ampdu_ref++;
1808                        if (mvm->ampdu_ref == 0)
1809                                mvm->ampdu_ref++;
1810                        mvm->ampdu_toggle = toggle_bit;
1811                }
1812                rx_status->ampdu_reference = mvm->ampdu_ref;
1813        }
1814
1815        if (unlikely(mvm->monitor_on))
1816                iwl_mvm_add_rtap_sniffer_config(mvm, skb);
1817
1818        rcu_read_lock();
1819
1820        if (desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
1821                u8 id = le32_get_bits(desc->status, IWL_RX_MPDU_STATUS_STA_ID);
1822
1823                if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
1824                        sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
1825                        if (IS_ERR(sta))
1826                                sta = NULL;
1827                }
1828        } else if (!is_multicast_ether_addr(hdr->addr2)) {
1829                /*
1830                 * This is fine since we prevent two stations with the same
1831                 * address from being added.
1832                 */
1833                sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
1834        }
1835
1836        if (iwl_mvm_rx_crypto(mvm, sta, hdr, rx_status, phy_info, desc,
1837                              le32_to_cpu(pkt->len_n_flags), queue,
1838                              &crypt_len)) {
1839                kfree_skb(skb);
1840                goto out;
1841        }
1842
1843        if (sta) {
1844                struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1845                struct ieee80211_vif *tx_blocked_vif =
1846                        rcu_dereference(mvm->csa_tx_blocked_vif);
1847                u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
1848                               IWL_RX_MPDU_REORDER_BAID_MASK) >>
1849                               IWL_RX_MPDU_REORDER_BAID_SHIFT);
1850                struct iwl_fw_dbg_trigger_tlv *trig;
1851                struct ieee80211_vif *vif = mvmsta->vif;
1852
1853                if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
1854                    !is_multicast_ether_addr(hdr->addr1) &&
1855                    ieee80211_is_data(hdr->frame_control) &&
1856                    time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1857                        schedule_delayed_work(&mvm->tcm.work, 0);
1858
1859                /*
1860                 * We have tx blocked stations (with CS bit). If we heard
1861                 * frames from a blocked station on a new channel we can
1862                 * TX to it again.
1863                 */
1864                if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) {
1865                        struct iwl_mvm_vif *mvmvif =
1866                                iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1867                        struct iwl_rx_sta_csa rx_sta_csa = {
1868                                .all_sta_unblocked = true,
1869                                .vif = tx_blocked_vif,
1870                        };
1871
1872                        if (mvmvif->csa_target_freq == rx_status->freq)
1873                                iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
1874                                                                 false);
1875                        ieee80211_iterate_stations_atomic(mvm->hw,
1876                                                          iwl_mvm_rx_get_sta_block_tx,
1877                                                          &rx_sta_csa);
1878
1879                        if (rx_sta_csa.all_sta_unblocked) {
1880                                RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1881                                /* Unblock BCAST / MCAST station */
1882                                iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1883                                cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1884                        }
1885                }
1886
1887                rs_update_last_rssi(mvm, mvmsta, rx_status);
1888
1889                trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
1890                                             ieee80211_vif_to_wdev(vif),
1891                                             FW_DBG_TRIGGER_RSSI);
1892
1893                if (trig && ieee80211_is_beacon(hdr->frame_control)) {
1894                        struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
1895                        s32 rssi;
1896
1897                        rssi_trig = (void *)trig->data;
1898                        rssi = le32_to_cpu(rssi_trig->rssi);
1899
1900                        if (rx_status->signal < rssi)
1901                                iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1902                                                        NULL);
1903                }
1904
1905                if (ieee80211_is_data(hdr->frame_control))
1906                        iwl_mvm_rx_csum(mvm, sta, skb, pkt);
1907
1908                if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) {
1909                        kfree_skb(skb);
1910                        goto out;
1911                }
1912
1913                /*
1914                 * Our hardware de-aggregates AMSDUs but copies the mac header
1915                 * as it to the de-aggregated MPDUs. We need to turn off the
1916                 * AMSDU bit in the QoS control ourselves.
1917                 * In addition, HW reverses addr3 and addr4 - reverse it back.
1918                 */
1919                if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
1920                    !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
1921                        u8 *qc = ieee80211_get_qos_ctl(hdr);
1922
1923                        *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1924
1925                        if (mvm->trans->trans_cfg->device_family ==
1926                            IWL_DEVICE_FAMILY_9000) {
1927                                iwl_mvm_flip_address(hdr->addr3);
1928
1929                                if (ieee80211_has_a4(hdr->frame_control))
1930                                        iwl_mvm_flip_address(hdr->addr4);
1931                        }
1932                }
1933                if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
1934                        u32 reorder_data = le32_to_cpu(desc->reorder_data);
1935
1936                        iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
1937                }
1938        }
1939
1940        if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
1941            rate_n_flags & RATE_MCS_SGI_MSK)
1942                rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1943        if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1944                rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
1945        if (rate_n_flags & RATE_MCS_LDPC_MSK)
1946                rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1947        if (rate_n_flags & RATE_MCS_HT_MSK) {
1948                u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1949                                RATE_MCS_STBC_POS;
1950                rx_status->encoding = RX_ENC_HT;
1951                rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1952                rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1953        } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1954                u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1955                                RATE_MCS_STBC_POS;
1956                rx_status->nss =
1957                        ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1958                                                RATE_VHT_MCS_NSS_POS) + 1;
1959                rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1960                rx_status->encoding = RX_ENC_VHT;
1961                rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1962                if (rate_n_flags & RATE_MCS_BF_MSK)
1963                        rx_status->enc_flags |= RX_ENC_FLAG_BF;
1964        } else if (!(rate_n_flags & RATE_MCS_HE_MSK)) {
1965                int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1966                                                               rx_status->band);
1967
1968                if (WARN(rate < 0 || rate > 0xFF,
1969                         "Invalid rate flags 0x%x, band %d,\n",
1970                         rate_n_flags, rx_status->band)) {
1971                        kfree_skb(skb);
1972                        goto out;
1973                }
1974                rx_status->rate_idx = rate;
1975        }
1976
1977        /* management stuff on default queue */
1978        if (!queue) {
1979                if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
1980                              ieee80211_is_probe_resp(hdr->frame_control)) &&
1981                             mvm->sched_scan_pass_all ==
1982                             SCHED_SCAN_PASS_ALL_ENABLED))
1983                        mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
1984
1985                if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
1986                             ieee80211_is_probe_resp(hdr->frame_control)))
1987                        rx_status->boottime_ns = ktime_get_boottime_ns();
1988        }
1989
1990        if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) {
1991                kfree_skb(skb);
1992                goto out;
1993        }
1994
1995        if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
1996                iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue,
1997                                                sta, csi);
1998out:
1999        rcu_read_unlock();
2000}
2001
2002void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi,
2003                                struct iwl_rx_cmd_buffer *rxb, int queue)
2004{
2005        struct ieee80211_rx_status *rx_status;
2006        struct iwl_rx_packet *pkt = rxb_addr(rxb);
2007        struct iwl_rx_no_data *desc = (void *)pkt->data;
2008        u32 rate_n_flags = le32_to_cpu(desc->rate);
2009        u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time);
2010        u32 rssi = le32_to_cpu(desc->rssi);
2011        u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK;
2012        u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD;
2013        struct ieee80211_sta *sta = NULL;
2014        struct sk_buff *skb;
2015        u8 channel, energy_a, energy_b;
2016        struct iwl_mvm_rx_phy_data phy_data = {
2017                .info_type = le32_get_bits(desc->phy_info[1],
2018                                           IWL_RX_PHY_DATA1_INFO_TYPE_MASK),
2019                .d0 = desc->phy_info[0],
2020                .d1 = desc->phy_info[1],
2021        };
2022
2023        if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*desc)))
2024                return;
2025
2026        if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
2027                return;
2028
2029        energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS;
2030        energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS;
2031        channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS;
2032
2033        /* Dont use dev_alloc_skb(), we'll have enough headroom once
2034         * ieee80211_hdr pulled.
2035         */
2036        skb = alloc_skb(128, GFP_ATOMIC);
2037        if (!skb) {
2038                IWL_ERR(mvm, "alloc_skb failed\n");
2039                return;
2040        }
2041
2042        rx_status = IEEE80211_SKB_RXCB(skb);
2043
2044        /* 0-length PSDU */
2045        rx_status->flag |= RX_FLAG_NO_PSDU;
2046
2047        switch (info_type) {
2048        case RX_NO_DATA_INFO_TYPE_NDP:
2049                rx_status->zero_length_psdu_type =
2050                        IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING;
2051                break;
2052        case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED:
2053        case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED:
2054                rx_status->zero_length_psdu_type =
2055                        IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED;
2056                break;
2057        default:
2058                rx_status->zero_length_psdu_type =
2059                        IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR;
2060                break;
2061        }
2062
2063        /* This may be overridden by iwl_mvm_rx_he() to HE_RU */
2064        switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
2065        case RATE_MCS_CHAN_WIDTH_20:
2066                break;
2067        case RATE_MCS_CHAN_WIDTH_40:
2068                rx_status->bw = RATE_INFO_BW_40;
2069                break;
2070        case RATE_MCS_CHAN_WIDTH_80:
2071                rx_status->bw = RATE_INFO_BW_80;
2072                break;
2073        case RATE_MCS_CHAN_WIDTH_160:
2074                rx_status->bw = RATE_INFO_BW_160;
2075                break;
2076        }
2077
2078        if (rate_n_flags & RATE_MCS_HE_MSK)
2079                iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags,
2080                              phy_info, queue);
2081
2082        iwl_mvm_decode_lsig(skb, &phy_data);
2083
2084        rx_status->device_timestamp = gp2_on_air_rise;
2085        rx_status->band = channel > 14 ? NL80211_BAND_5GHZ :
2086                NL80211_BAND_2GHZ;
2087        rx_status->freq = ieee80211_channel_to_frequency(channel,
2088                                                         rx_status->band);
2089        iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a,
2090                                    energy_b);
2091
2092        rcu_read_lock();
2093
2094        if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
2095            rate_n_flags & RATE_MCS_SGI_MSK)
2096                rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
2097        if (rate_n_flags & RATE_HT_MCS_GF_MSK)
2098                rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
2099        if (rate_n_flags & RATE_MCS_LDPC_MSK)
2100                rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
2101        if (rate_n_flags & RATE_MCS_HT_MSK) {
2102                u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
2103                                RATE_MCS_STBC_POS;
2104                rx_status->encoding = RX_ENC_HT;
2105                rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
2106                rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
2107        } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
2108                u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
2109                                RATE_MCS_STBC_POS;
2110                rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
2111                rx_status->encoding = RX_ENC_VHT;
2112                rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
2113                if (rate_n_flags & RATE_MCS_BF_MSK)
2114                        rx_status->enc_flags |= RX_ENC_FLAG_BF;
2115                /*
2116                 * take the nss from the rx_vec since the rate_n_flags has
2117                 * only 2 bits for the nss which gives a max of 4 ss but
2118                 * there may be up to 8 spatial streams
2119                 */
2120                rx_status->nss =
2121                        le32_get_bits(desc->rx_vec[0],
2122                                      RX_NO_DATA_RX_VEC0_VHT_NSTS_MSK) + 1;
2123        } else if (rate_n_flags & RATE_MCS_HE_MSK) {
2124                rx_status->nss =
2125                        le32_get_bits(desc->rx_vec[0],
2126                                      RX_NO_DATA_RX_VEC0_HE_NSTS_MSK) + 1;
2127        } else {
2128                int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
2129                                                               rx_status->band);
2130
2131                if (WARN(rate < 0 || rate > 0xFF,
2132                         "Invalid rate flags 0x%x, band %d,\n",
2133                         rate_n_flags, rx_status->band)) {
2134                        kfree_skb(skb);
2135                        goto out;
2136                }
2137                rx_status->rate_idx = rate;
2138        }
2139
2140        ieee80211_rx_napi(mvm->hw, sta, skb, napi);
2141out:
2142        rcu_read_unlock();
2143}
2144
2145void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
2146                              struct iwl_rx_cmd_buffer *rxb, int queue)
2147{
2148        struct iwl_rx_packet *pkt = rxb_addr(rxb);
2149        struct iwl_frame_release *release = (void *)pkt->data;
2150
2151        if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release)))
2152                return;
2153
2154        iwl_mvm_release_frames_from_notif(mvm, napi, release->baid,
2155                                          le16_to_cpu(release->nssn),
2156                                          queue, 0);
2157}
2158
2159void iwl_mvm_rx_bar_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
2160                                  struct iwl_rx_cmd_buffer *rxb, int queue)
2161{
2162        struct iwl_rx_packet *pkt = rxb_addr(rxb);
2163        struct iwl_bar_frame_release *release = (void *)pkt->data;
2164        unsigned int baid = le32_get_bits(release->ba_info,
2165                                          IWL_BAR_FRAME_RELEASE_BAID_MASK);
2166        unsigned int nssn = le32_get_bits(release->ba_info,
2167                                          IWL_BAR_FRAME_RELEASE_NSSN_MASK);
2168        unsigned int sta_id = le32_get_bits(release->sta_tid,
2169                                            IWL_BAR_FRAME_RELEASE_STA_MASK);
2170        unsigned int tid = le32_get_bits(release->sta_tid,
2171                                         IWL_BAR_FRAME_RELEASE_TID_MASK);
2172        struct iwl_mvm_baid_data *baid_data;
2173
2174        if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release)))
2175                return;
2176
2177        if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID ||
2178                         baid >= ARRAY_SIZE(mvm->baid_map)))
2179                return;
2180
2181        rcu_read_lock();
2182        baid_data = rcu_dereference(mvm->baid_map[baid]);
2183        if (!baid_data) {
2184                IWL_DEBUG_RX(mvm,
2185                             "Got valid BAID %d but not allocated, invalid BAR release!\n",
2186                              baid);
2187                goto out;
2188        }
2189
2190        if (WARN(tid != baid_data->tid || sta_id != baid_data->sta_id,
2191                 "baid 0x%x is mapped to sta:%d tid:%d, but BAR release received for sta:%d tid:%d\n",
2192                 baid, baid_data->sta_id, baid_data->tid, sta_id,
2193                 tid))
2194                goto out;
2195
2196        iwl_mvm_release_frames_from_notif(mvm, napi, baid, nssn, queue, 0);
2197out:
2198        rcu_read_unlock();
2199}
2200