iwlwifi/mvm/rxmq.c

0001 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
0002 /*
0003  * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
0004  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
0005  * Copyright (C) 2015-2017 Intel Deutschland GmbH
0006  */
0007 #include <linux/etherdevice.h>
0008 #include <linux/skbuff.h>
0009 #include "iwl-trans.h"
0010 #include "mvm.h"
0011 #include "fw-api.h"
0012
0013 static void *iwl_mvm_skb_get_hdr(struct sk_buff *skb)
0014 {
0015     struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
0016     u8 *data = skb->data;
0017
0018     /* Alignment concerns */
0019     BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) % 4);
0020     BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) % 4);
0021     BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) % 4);
0022     BUILD_BUG_ON(sizeof(struct ieee80211_vendor_radiotap) % 4);
0023
0024     if (rx_status->flag & RX_FLAG_RADIOTAP_HE)
0025         data += sizeof(struct ieee80211_radiotap_he);
0026     if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU)
0027         data += sizeof(struct ieee80211_radiotap_he_mu);
0028     if (rx_status->flag & RX_FLAG_RADIOTAP_LSIG)
0029         data += sizeof(struct ieee80211_radiotap_lsig);
0030     if (rx_status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
0031         struct ieee80211_vendor_radiotap *radiotap = (void *)data;
0032
0033         data += sizeof(*radiotap) + radiotap->len + radiotap->pad;
0034     }
0035
0036     return data;
0037 }
0038
0039 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
0040                    int queue, struct ieee80211_sta *sta)
0041 {
0042     struct iwl_mvm_sta *mvmsta;
0043     struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb);
0044     struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
0045     struct iwl_mvm_key_pn *ptk_pn;
0046     int res;
0047     u8 tid, keyidx;
0048     u8 pn[IEEE80211_CCMP_PN_LEN];
0049     u8 *extiv;
0050
0051     /* do PN checking */
0052
0053     /* multicast and non-data only arrives on default queue */
0054     if (!ieee80211_is_data(hdr->frame_control) ||
0055         is_multicast_ether_addr(hdr->addr1))
0056         return 0;
0057
0058     /* do not check PN for open AP */
0059     if (!(stats->flag & RX_FLAG_DECRYPTED))
0060         return 0;
0061
0062     /*
0063      * avoid checking for default queue - we don't want to replicate
0064      * all the logic that's necessary for checking the PN on fragmented
0065      * frames, leave that to mac80211
0066      */
0067     if (queue == 0)
0068         return 0;
0069
0070     /* if we are here - this for sure is either CCMP or GCMP */
0071     if (IS_ERR_OR_NULL(sta)) {
0072         IWL_DEBUG_DROP(mvm,
0073                    "expected hw-decrypted unicast frame for station\n");
0074         return -1;
0075     }
0076
0077     mvmsta = iwl_mvm_sta_from_mac80211(sta);
0078
0079     extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
0080     keyidx = extiv[3] >> 6;
0081
0082     ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
0083     if (!ptk_pn)
0084         return -1;
0085
0086     if (ieee80211_is_data_qos(hdr->frame_control))
0087         tid = ieee80211_get_tid(hdr);
0088     else
0089         tid = 0;
0090
0091     /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
0092     if (tid >= IWL_MAX_TID_COUNT)
0093         return -1;
0094
0095     /* load pn */
0096     pn[0] = extiv[7];
0097     pn[1] = extiv[6];
0098     pn[2] = extiv[5];
0099     pn[3] = extiv[4];
0100     pn[4] = extiv[1];
0101     pn[5] = extiv[0];
0102
0103     res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN);
0104     if (res < 0)
0105         return -1;
0106     if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN))
0107         return -1;
0108
0109     memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
0110     stats->flag |= RX_FLAG_PN_VALIDATED;
0111
0112     return 0;
0113 }
0114
0115 /* iwl_mvm_create_skb Adds the rxb to a new skb */
0116 static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
0117                   struct ieee80211_hdr *hdr, u16 len, u8 crypt_len,
0118                   struct iwl_rx_cmd_buffer *rxb)
0119 {
0120     struct iwl_rx_packet *pkt = rxb_addr(rxb);
0121     struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
0122     unsigned int headlen, fraglen, pad_len = 0;
0123     unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
0124     u8 mic_crc_len = u8_get_bits(desc->mac_flags1,
0125                      IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK) << 1;
0126
0127     if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
0128         len -= 2;
0129         pad_len = 2;
0130     }
0131
0132     /*
0133      * For non monitor interface strip the bytes the RADA might not have
0134      * removed. As monitor interface cannot exist with other interfaces
0135      * this removal is safe.
0136      */
0137     if (mic_crc_len && !ieee80211_hw_check(mvm->hw, RX_INCLUDES_FCS)) {
0138         u32 pkt_flags = le32_to_cpu(pkt->len_n_flags);
0139
0140         /*
0141          * If RADA was not enabled then decryption was not performed so
0142          * the MIC cannot be removed.
0143          */
0144         if (!(pkt_flags & FH_RSCSR_RADA_EN)) {
0145             if (WARN_ON(crypt_len > mic_crc_len))
0146                 return -EINVAL;
0147
0148             mic_crc_len -= crypt_len;
0149         }
0150
0151         if (WARN_ON(mic_crc_len > len))
0152             return -EINVAL;
0153
0154         len -= mic_crc_len;
0155     }
0156
0157     /* If frame is small enough to fit in skb->head, pull it completely.
0158      * If not, only pull ieee80211_hdr (including crypto if present, and
0159      * an additional 8 bytes for SNAP/ethertype, see below) so that
0160      * splice() or TCP coalesce are more efficient.
0161      *
0162      * Since, in addition, ieee80211_data_to_8023() always pull in at
0163      * least 8 bytes (possibly more for mesh) we can do the same here
0164      * to save the cost of doing it later. That still doesn't pull in
0165      * the actual IP header since the typical case has a SNAP header.
0166      * If the latter changes (there are efforts in the standards group
0167      * to do so) we should revisit this and ieee80211_data_to_8023().
0168      */
0169     headlen = (len <= skb_tailroom(skb)) ? len :
0170                            hdrlen + crypt_len + 8;
0171
0172     /* The firmware may align the packet to DWORD.
0173      * The padding is inserted after the IV.
0174      * After copying the header + IV skip the padding if
0175      * present before copying packet data.
0176      */
0177     hdrlen += crypt_len;
0178
0179     if (unlikely(headlen < hdrlen))
0180         return -EINVAL;
0181
0182     skb_put_data(skb, hdr, hdrlen);
0183     skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
0184
0185     /*
0186      * If we did CHECKSUM_COMPLETE, the hardware only does it right for
0187      * certain cases and starts the checksum after the SNAP. Check if
0188      * this is the case - it's easier to just bail out to CHECKSUM_NONE
0189      * in the cases the hardware didn't handle, since it's rare to see
0190      * such packets, even though the hardware did calculate the checksum
0191      * in this case, just starting after the MAC header instead.
0192      *
0193      * Starting from Bz hardware, it calculates starting directly after
0194      * the MAC header, so that matches mac80211's expectation.
0195      */
0196     if (skb->ip_summed == CHECKSUM_COMPLETE &&
0197         mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ) {
0198         struct {
0199             u8 hdr[6];
0200             __be16 type;
0201         } __packed *shdr = (void *)((u8 *)hdr + hdrlen + pad_len);
0202
0203         if (unlikely(headlen - hdrlen < sizeof(*shdr) ||
0204                  !ether_addr_equal(shdr->hdr, rfc1042_header) ||
0205                  (shdr->type != htons(ETH_P_IP) &&
0206                   shdr->type != htons(ETH_P_ARP) &&
0207                   shdr->type != htons(ETH_P_IPV6) &&
0208                   shdr->type != htons(ETH_P_8021Q) &&
0209                   shdr->type != htons(ETH_P_PAE) &&
0210                   shdr->type != htons(ETH_P_TDLS))))
0211             skb->ip_summed = CHECKSUM_NONE;
0212         else
0213             /* mac80211 assumes full CSUM including SNAP header */
0214             skb_postpush_rcsum(skb, shdr, sizeof(*shdr));
0215     }
0216
0217     fraglen = len - headlen;
0218
0219     if (fraglen) {
0220         int offset = (u8 *)hdr + headlen + pad_len -
0221                  (u8 *)rxb_addr(rxb) + rxb_offset(rxb);
0222
0223         skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
0224                 fraglen, rxb->truesize);
0225     }
0226
0227     return 0;
0228 }
0229
0230 static void iwl_mvm_add_rtap_sniffer_config(struct iwl_mvm *mvm,
0231                         struct sk_buff *skb)
0232 {
0233     struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
0234     struct ieee80211_vendor_radiotap *radiotap;
0235     const int size = sizeof(*radiotap) + sizeof(__le16);
0236
0237     if (!mvm->cur_aid)
0238         return;
0239
0240     /* ensure alignment */
0241     BUILD_BUG_ON((size + 2) % 4);
0242
0243     radiotap = skb_put(skb, size + 2);
0244     radiotap->align = 1;
0245     /* Intel OUI */
0246     radiotap->oui[0] = 0xf6;
0247     radiotap->oui[1] = 0x54;
0248     radiotap->oui[2] = 0x25;
0249     /* radiotap sniffer config sub-namespace */
0250     radiotap->subns = 1;
0251     radiotap->present = 0x1;
0252     radiotap->len = size - sizeof(*radiotap);
0253     radiotap->pad = 2;
0254
0255     /* fill the data now */
0256     memcpy(radiotap->data, &mvm->cur_aid, sizeof(mvm->cur_aid));
0257     /* and clear the padding */
0258     memset(radiotap->data + sizeof(__le16), 0, radiotap->pad);
0259
0260     rx_status->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
0261 }
0262
0263 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
0264 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
0265                         struct napi_struct *napi,
0266                         struct sk_buff *skb, int queue,
0267                         struct ieee80211_sta *sta)
0268 {
0269     if (iwl_mvm_check_pn(mvm, skb, queue, sta))
0270         kfree_skb(skb);
0271     else
0272         ieee80211_rx_napi(mvm->hw, sta, skb, napi);
0273 }
0274
0275 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
0276                     struct ieee80211_rx_status *rx_status,
0277                     u32 rate_n_flags, int energy_a,
0278                     int energy_b)
0279 {
0280     int max_energy;
0281     u32 rate_flags = rate_n_flags;
0282
0283     energy_a = energy_a ? -energy_a : S8_MIN;
0284     energy_b = energy_b ? -energy_b : S8_MIN;
0285     max_energy = max(energy_a, energy_b);
0286
0287     IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
0288             energy_a, energy_b, max_energy);
0289
0290     rx_status->signal = max_energy;
0291     rx_status->chains =
0292         (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
0293     rx_status->chain_signal[0] = energy_a;
0294     rx_status->chain_signal[1] = energy_b;
0295 }
0296
0297 static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
0298                 struct ieee80211_hdr *hdr,
0299                 struct iwl_rx_mpdu_desc *desc,
0300                 u32 status)
0301 {
0302     struct iwl_mvm_sta *mvmsta;
0303     struct iwl_mvm_vif *mvmvif;
0304     u8 keyid;
0305     struct ieee80211_key_conf *key;
0306     u32 len = le16_to_cpu(desc->mpdu_len);
0307     const u8 *frame = (void *)hdr;
0308
0309     if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == IWL_RX_MPDU_STATUS_SEC_NONE)
0310         return 0;
0311
0312     /*
0313      * For non-beacon, we don't really care. But beacons may
0314      * be filtered out, and we thus need the firmware's replay
0315      * detection, otherwise beacons the firmware previously
0316      * filtered could be replayed, or something like that, and
0317      * it can filter a lot - though usually only if nothing has
0318      * changed.
0319      */
0320     if (!ieee80211_is_beacon(hdr->frame_control))
0321         return 0;
0322
0323     /* key mismatch - will also report !MIC_OK but we shouldn't count it */
0324     if (!(status & IWL_RX_MPDU_STATUS_KEY_VALID))
0325         return -1;
0326
0327     /* good cases */
0328     if (likely(status & IWL_RX_MPDU_STATUS_MIC_OK &&
0329            !(status & IWL_RX_MPDU_STATUS_REPLAY_ERROR)))
0330         return 0;
0331
0332     if (!sta)
0333         return -1;
0334
0335     mvmsta = iwl_mvm_sta_from_mac80211(sta);
0336
0337     mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
0338
0339     /*
0340      * both keys will have the same cipher and MIC length, use
0341      * whichever one is available
0342      */
0343     key = rcu_dereference(mvmvif->bcn_prot.keys[0]);
0344     if (!key) {
0345         key = rcu_dereference(mvmvif->bcn_prot.keys[1]);
0346         if (!key)
0347             return -1;
0348     }
0349
0350     if (len < key->icv_len + IEEE80211_GMAC_PN_LEN + 2)
0351         return -1;
0352
0353     /* get the real key ID */
0354     keyid = frame[len - key->icv_len - IEEE80211_GMAC_PN_LEN - 2];
0355     /* and if that's the other key, look it up */
0356     if (keyid != key->keyidx) {
0357         /*
0358          * shouldn't happen since firmware checked, but be safe
0359          * in case the MIC length is wrong too, for example
0360          */
0361         if (keyid != 6 && keyid != 7)
0362             return -1;
0363         key = rcu_dereference(mvmvif->bcn_prot.keys[keyid - 6]);
0364         if (!key)
0365             return -1;
0366     }
0367
0368     /* Report status to mac80211 */
0369     if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
0370         ieee80211_key_mic_failure(key);
0371     else if (status & IWL_RX_MPDU_STATUS_REPLAY_ERROR)
0372         ieee80211_key_replay(key);
0373
0374     return -1;
0375 }
0376
0377 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
0378                  struct ieee80211_hdr *hdr,
0379                  struct ieee80211_rx_status *stats, u16 phy_info,
0380                  struct iwl_rx_mpdu_desc *desc,
0381                  u32 pkt_flags, int queue, u8 *crypt_len)
0382 {
0383     u32 status = le32_to_cpu(desc->status);
0384
0385     /*
0386      * Drop UNKNOWN frames in aggregation, unless in monitor mode
0387      * (where we don't have the keys).
0388      * We limit this to aggregation because in TKIP this is a valid
0389      * scenario, since we may not have the (correct) TTAK (phase 1
0390      * key) in the firmware.
0391      */
0392     if (phy_info & IWL_RX_MPDU_PHY_AMPDU &&
0393         (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
0394         IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on)
0395         return -1;
0396
0397     if (unlikely(ieee80211_is_mgmt(hdr->frame_control) &&
0398              !ieee80211_has_protected(hdr->frame_control)))
0399         return iwl_mvm_rx_mgmt_prot(sta, hdr, desc, status);
0400
0401     if (!ieee80211_has_protected(hdr->frame_control) ||
0402         (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
0403         IWL_RX_MPDU_STATUS_SEC_NONE)
0404         return 0;
0405
0406     /* TODO: handle packets encrypted with unknown alg */
0407
0408     switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
0409     case IWL_RX_MPDU_STATUS_SEC_CCM:
0410     case IWL_RX_MPDU_STATUS_SEC_GCM:
0411         BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
0412         /* alg is CCM: check MIC only */
0413         if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
0414             return -1;
0415
0416         stats->flag |= RX_FLAG_DECRYPTED;
0417         if (pkt_flags & FH_RSCSR_RADA_EN)
0418             stats->flag |= RX_FLAG_MIC_STRIPPED;
0419         *crypt_len = IEEE80211_CCMP_HDR_LEN;
0420         return 0;
0421     case IWL_RX_MPDU_STATUS_SEC_TKIP:
0422         /* Don't drop the frame and decrypt it in SW */
0423         if (!fw_has_api(&mvm->fw->ucode_capa,
0424                 IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
0425             !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
0426             return 0;
0427
0428         if (mvm->trans->trans_cfg->gen2 &&
0429             !(status & RX_MPDU_RES_STATUS_MIC_OK))
0430             stats->flag |= RX_FLAG_MMIC_ERROR;
0431
0432         *crypt_len = IEEE80211_TKIP_IV_LEN;
0433         fallthrough;
0434     case IWL_RX_MPDU_STATUS_SEC_WEP:
0435         if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
0436             return -1;
0437
0438         stats->flag |= RX_FLAG_DECRYPTED;
0439         if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
0440                 IWL_RX_MPDU_STATUS_SEC_WEP)
0441             *crypt_len = IEEE80211_WEP_IV_LEN;
0442
0443         if (pkt_flags & FH_RSCSR_RADA_EN) {
0444             stats->flag |= RX_FLAG_ICV_STRIPPED;
0445             if (mvm->trans->trans_cfg->gen2)
0446                 stats->flag |= RX_FLAG_MMIC_STRIPPED;
0447         }
0448
0449         return 0;
0450     case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
0451         if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
0452             return -1;
0453         stats->flag |= RX_FLAG_DECRYPTED;
0454         return 0;
0455     case RX_MPDU_RES_STATUS_SEC_CMAC_GMAC_ENC:
0456         break;
0457     default:
0458         /*
0459          * Sometimes we can get frames that were not decrypted
0460          * because the firmware didn't have the keys yet. This can
0461          * happen after connection where we can get multicast frames
0462          * before the GTK is installed.
0463          * Silently drop those frames.
0464          * Also drop un-decrypted frames in monitor mode.
0465          */
0466         if (!is_multicast_ether_addr(hdr->addr1) &&
0467             !mvm->monitor_on && net_ratelimit())
0468             IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
0469     }
0470
0471     return 0;
0472 }
0473
0474 static void iwl_mvm_rx_csum(struct iwl_mvm *mvm,
0475                 struct ieee80211_sta *sta,
0476                 struct sk_buff *skb,
0477                 struct iwl_rx_packet *pkt)
0478 {
0479     struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
0480
0481     if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
0482         if (pkt->len_n_flags & cpu_to_le32(FH_RSCSR_RPA_EN)) {
0483             u16 hwsum = be16_to_cpu(desc->v3.raw_xsum);
0484
0485             skb->ip_summed = CHECKSUM_COMPLETE;
0486             skb->csum = csum_unfold(~(__force __sum16)hwsum);
0487         }
0488     } else {
0489         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
0490         struct iwl_mvm_vif *mvmvif;
0491         u16 flags = le16_to_cpu(desc->l3l4_flags);
0492         u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
0493                   IWL_RX_L3_PROTO_POS);
0494
0495         mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
0496
0497         if (mvmvif->features & NETIF_F_RXCSUM &&
0498             flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
0499             (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
0500              l3_prot == IWL_RX_L3_TYPE_IPV6 ||
0501              l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
0502             skb->ip_summed = CHECKSUM_UNNECESSARY;
0503     }
0504 }
0505
0506 /*
0507  * returns true if a packet is a duplicate and should be dropped.
0508  * Updates AMSDU PN tracking info
0509  */
0510 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue,
0511                struct ieee80211_rx_status *rx_status,
0512                struct ieee80211_hdr *hdr,
0513                struct iwl_rx_mpdu_desc *desc)
0514 {
0515     struct iwl_mvm_sta *mvm_sta;
0516     struct iwl_mvm_rxq_dup_data *dup_data;
0517     u8 tid, sub_frame_idx;
0518
0519     if (WARN_ON(IS_ERR_OR_NULL(sta)))
0520         return false;
0521
0522     mvm_sta = iwl_mvm_sta_from_mac80211(sta);
0523     dup_data = &mvm_sta->dup_data[queue];
0524
0525     /*
0526      * Drop duplicate 802.11 retransmissions
0527      * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
0528      */
0529     if (ieee80211_is_ctl(hdr->frame_control) ||
0530         ieee80211_is_qos_nullfunc(hdr->frame_control) ||
0531         is_multicast_ether_addr(hdr->addr1)) {
0532         rx_status->flag |= RX_FLAG_DUP_VALIDATED;
0533         return false;
0534     }
0535
0536     if (ieee80211_is_data_qos(hdr->frame_control))
0537         /* frame has qos control */
0538         tid = ieee80211_get_tid(hdr);
0539     else
0540         tid = IWL_MAX_TID_COUNT;
0541
0542     /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
0543     sub_frame_idx = desc->amsdu_info &
0544         IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
0545
0546     if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
0547              dup_data->last_seq[tid] == hdr->seq_ctrl &&
0548              dup_data->last_sub_frame[tid] >= sub_frame_idx))
0549         return true;
0550
0551     /* Allow same PN as the first subframe for following sub frames */
0552     if (dup_data->last_seq[tid] == hdr->seq_ctrl &&
0553         sub_frame_idx > dup_data->last_sub_frame[tid] &&
0554         desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU)
0555         rx_status->flag |= RX_FLAG_ALLOW_SAME_PN;
0556
0557     dup_data->last_seq[tid] = hdr->seq_ctrl;
0558     dup_data->last_sub_frame[tid] = sub_frame_idx;
0559
0560     rx_status->flag |= RX_FLAG_DUP_VALIDATED;
0561
0562     return false;
0563 }
0564
0565 /*
0566  * Returns true if sn2 - buffer_size < sn1 < sn2.
0567  * To be used only in order to compare reorder buffer head with NSSN.
0568  * We fully trust NSSN unless it is behind us due to reorder timeout.
0569  * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
0570  */
0571 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
0572 {
0573     return ieee80211_sn_less(sn1, sn2) &&
0574            !ieee80211_sn_less(sn1, sn2 - buffer_size);
0575 }
0576
0577 static void iwl_mvm_sync_nssn(struct iwl_mvm *mvm, u8 baid, u16 nssn)
0578 {
0579     if (IWL_MVM_USE_NSSN_SYNC) {
0580         struct iwl_mvm_nssn_sync_data notif = {
0581             .baid = baid,
0582             .nssn = nssn,
0583         };
0584
0585         iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NSSN_SYNC, false,
0586                         &notif, sizeof(notif));
0587     }
0588 }
0589
0590 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
0591
0592 enum iwl_mvm_release_flags {
0593     IWL_MVM_RELEASE_SEND_RSS_SYNC = BIT(0),
0594     IWL_MVM_RELEASE_FROM_RSS_SYNC = BIT(1),
0595 };
0596
0597 static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
0598                    struct ieee80211_sta *sta,
0599                    struct napi_struct *napi,
0600                    struct iwl_mvm_baid_data *baid_data,
0601                    struct iwl_mvm_reorder_buffer *reorder_buf,
0602                    u16 nssn, u32 flags)
0603 {
0604     struct iwl_mvm_reorder_buf_entry *entries =
0605         &baid_data->entries[reorder_buf->queue *
0606                     baid_data->entries_per_queue];
0607     u16 ssn = reorder_buf->head_sn;
0608
0609     lockdep_assert_held(&reorder_buf->lock);
0610
0611     /*
0612      * We keep the NSSN not too far behind, if we are sync'ing it and it
0613      * is more than 2048 ahead of us, it must be behind us. Discard it.
0614      * This can happen if the queue that hit the 0 / 2048 seqno was lagging
0615      * behind and this queue already processed packets. The next if
0616      * would have caught cases where this queue would have processed less
0617      * than 64 packets, but it may have processed more than 64 packets.
0618      */
0619     if ((flags & IWL_MVM_RELEASE_FROM_RSS_SYNC) &&
0620         ieee80211_sn_less(nssn, ssn))
0621         goto set_timer;
0622
0623     /* ignore nssn smaller than head sn - this can happen due to timeout */
0624     if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
0625         goto set_timer;
0626
0627     while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
0628         int index = ssn % reorder_buf->buf_size;
0629         struct sk_buff_head *skb_list = &entries[index].e.frames;
0630         struct sk_buff *skb;
0631
0632         ssn = ieee80211_sn_inc(ssn);
0633         if ((flags & IWL_MVM_RELEASE_SEND_RSS_SYNC) &&
0634             (ssn == 2048 || ssn == 0))
0635             iwl_mvm_sync_nssn(mvm, baid_data->baid, ssn);
0636
0637         /*
0638          * Empty the list. Will have more than one frame for A-MSDU.
0639          * Empty list is valid as well since nssn indicates frames were
0640          * received.
0641          */
0642         while ((skb = __skb_dequeue(skb_list))) {
0643             iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
0644                             reorder_buf->queue,
0645                             sta);
0646             reorder_buf->num_stored--;
0647         }
0648     }
0649     reorder_buf->head_sn = nssn;
0650
0651 set_timer:
0652     if (reorder_buf->num_stored && !reorder_buf->removed) {
0653         u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
0654
0655         while (skb_queue_empty(&entries[index].e.frames))
0656             index = (index + 1) % reorder_buf->buf_size;
0657         /* modify timer to match next frame's expiration time */
0658         mod_timer(&reorder_buf->reorder_timer,
0659               entries[index].e.reorder_time + 1 +
0660               RX_REORDER_BUF_TIMEOUT_MQ);
0661     } else {
0662         del_timer(&reorder_buf->reorder_timer);
0663     }
0664 }
0665
0666 void iwl_mvm_reorder_timer_expired(struct timer_list *t)
0667 {
0668     struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
0669     struct iwl_mvm_baid_data *baid_data =
0670         iwl_mvm_baid_data_from_reorder_buf(buf);
0671     struct iwl_mvm_reorder_buf_entry *entries =
0672         &baid_data->entries[buf->queue * baid_data->entries_per_queue];
0673     int i;
0674     u16 sn = 0, index = 0;
0675     bool expired = false;
0676     bool cont = false;
0677
0678     spin_lock(&buf->lock);
0679
0680     if (!buf->num_stored || buf->removed) {
0681         spin_unlock(&buf->lock);
0682         return;
0683     }
0684
0685     for (i = 0; i < buf->buf_size ; i++) {
0686         index = (buf->head_sn + i) % buf->buf_size;
0687
0688         if (skb_queue_empty(&entries[index].e.frames)) {
0689             /*
0690              * If there is a hole and the next frame didn't expire
0691              * we want to break and not advance SN
0692              */
0693             cont = false;
0694             continue;
0695         }
0696         if (!cont &&
0697             !time_after(jiffies, entries[index].e.reorder_time +
0698                      RX_REORDER_BUF_TIMEOUT_MQ))
0699             break;
0700
0701         expired = true;
0702         /* continue until next hole after this expired frames */
0703         cont = true;
0704         sn = ieee80211_sn_add(buf->head_sn, i + 1);
0705     }
0706
0707     if (expired) {
0708         struct ieee80211_sta *sta;
0709         struct iwl_mvm_sta *mvmsta;
0710         u8 sta_id = baid_data->sta_id;
0711
0712         rcu_read_lock();
0713         sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
0714         mvmsta = iwl_mvm_sta_from_mac80211(sta);
0715
0716         /* SN is set to the last expired frame + 1 */
0717         IWL_DEBUG_HT(buf->mvm,
0718                  "Releasing expired frames for sta %u, sn %d\n",
0719                  sta_id, sn);
0720         iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
0721                              sta, baid_data->tid);
0722         iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data,
0723                        buf, sn, IWL_MVM_RELEASE_SEND_RSS_SYNC);
0724         rcu_read_unlock();
0725     } else {
0726         /*
0727          * If no frame expired and there are stored frames, index is now
0728          * pointing to the first unexpired frame - modify timer
0729          * accordingly to this frame.
0730          */
0731         mod_timer(&buf->reorder_timer,
0732               entries[index].e.reorder_time +
0733               1 + RX_REORDER_BUF_TIMEOUT_MQ);
0734     }
0735     spin_unlock(&buf->lock);
0736 }
0737
0738 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
0739                struct iwl_mvm_delba_data *data)
0740 {
0741     struct iwl_mvm_baid_data *ba_data;
0742     struct ieee80211_sta *sta;
0743     struct iwl_mvm_reorder_buffer *reorder_buf;
0744     u8 baid = data->baid;
0745
0746     if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
0747         return;
0748
0749     rcu_read_lock();
0750
0751     ba_data = rcu_dereference(mvm->baid_map[baid]);
0752     if (WARN_ON_ONCE(!ba_data))
0753         goto out;
0754
0755     sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
0756     if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
0757         goto out;
0758
0759     reorder_buf = &ba_data->reorder_buf[queue];
0760
0761     /* release all frames that are in the reorder buffer to the stack */
0762     spin_lock_bh(&reorder_buf->lock);
0763     iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
0764                    ieee80211_sn_add(reorder_buf->head_sn,
0765                         reorder_buf->buf_size),
0766                    0);
0767     spin_unlock_bh(&reorder_buf->lock);
0768     del_timer_sync(&reorder_buf->reorder_timer);
0769
0770 out:
0771     rcu_read_unlock();
0772 }
0773
0774 static void iwl_mvm_release_frames_from_notif(struct iwl_mvm *mvm,
0775                           struct napi_struct *napi,
0776                           u8 baid, u16 nssn, int queue,
0777                           u32 flags)
0778 {
0779     struct ieee80211_sta *sta;
0780     struct iwl_mvm_reorder_buffer *reorder_buf;
0781     struct iwl_mvm_baid_data *ba_data;
0782
0783     IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
0784              baid, nssn);
0785
0786     if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID ||
0787              baid >= ARRAY_SIZE(mvm->baid_map)))
0788         return;
0789
0790     rcu_read_lock();
0791
0792     ba_data = rcu_dereference(mvm->baid_map[baid]);
0793     if (!ba_data) {
0794         WARN(!(flags & IWL_MVM_RELEASE_FROM_RSS_SYNC),
0795              "BAID %d not found in map\n", baid);
0796         goto out;
0797     }
0798
0799     sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
0800     if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
0801         goto out;
0802
0803     reorder_buf = &ba_data->reorder_buf[queue];
0804
0805     spin_lock_bh(&reorder_buf->lock);
0806     iwl_mvm_release_frames(mvm, sta, napi, ba_data,
0807                    reorder_buf, nssn, flags);
0808     spin_unlock_bh(&reorder_buf->lock);
0809
0810 out:
0811     rcu_read_unlock();
0812 }
0813
0814 static void iwl_mvm_nssn_sync(struct iwl_mvm *mvm,
0815                   struct napi_struct *napi, int queue,
0816                   const struct iwl_mvm_nssn_sync_data *data)
0817 {
0818     iwl_mvm_release_frames_from_notif(mvm, napi, data->baid,
0819                       data->nssn, queue,
0820                       IWL_MVM_RELEASE_FROM_RSS_SYNC);
0821 }
0822
0823 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct napi_struct *napi,
0824                 struct iwl_rx_cmd_buffer *rxb, int queue)
0825 {
0826     struct iwl_rx_packet *pkt = rxb_addr(rxb);
0827     struct iwl_rxq_sync_notification *notif;
0828     struct iwl_mvm_internal_rxq_notif *internal_notif;
0829     u32 len = iwl_rx_packet_payload_len(pkt);
0830
0831     notif = (void *)pkt->data;
0832     internal_notif = (void *)notif->payload;
0833
0834     if (WARN_ONCE(len < sizeof(*notif) + sizeof(*internal_notif),
0835               "invalid notification size %d (%d)",
0836               len, (int)(sizeof(*notif) + sizeof(*internal_notif))))
0837         return;
0838     len -= sizeof(*notif) + sizeof(*internal_notif);
0839
0840     if (internal_notif->sync &&
0841         mvm->queue_sync_cookie != internal_notif->cookie) {
0842         WARN_ONCE(1, "Received expired RX queue sync message\n");
0843         return;
0844     }
0845
0846     switch (internal_notif->type) {
0847     case IWL_MVM_RXQ_EMPTY:
0848         WARN_ONCE(len, "invalid empty notification size %d", len);
0849         break;
0850     case IWL_MVM_RXQ_NOTIF_DEL_BA:
0851         if (WARN_ONCE(len != sizeof(struct iwl_mvm_delba_data),
0852                   "invalid delba notification size %d (%d)",
0853                   len, (int)sizeof(struct iwl_mvm_delba_data)))
0854             break;
0855         iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
0856         break;
0857     case IWL_MVM_RXQ_NSSN_SYNC:
0858         if (WARN_ONCE(len != sizeof(struct iwl_mvm_nssn_sync_data),
0859                   "invalid nssn sync notification size %d (%d)",
0860                   len, (int)sizeof(struct iwl_mvm_nssn_sync_data)))
0861             break;
0862         iwl_mvm_nssn_sync(mvm, napi, queue,
0863                   (void *)internal_notif->data);
0864         break;
0865     default:
0866         WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
0867     }
0868
0869     if (internal_notif->sync) {
0870         WARN_ONCE(!test_and_clear_bit(queue, &mvm->queue_sync_state),
0871               "queue sync: queue %d responded a second time!\n",
0872               queue);
0873         if (READ_ONCE(mvm->queue_sync_state) == 0)
0874             wake_up(&mvm->rx_sync_waitq);
0875     }
0876 }
0877
0878 static void iwl_mvm_oldsn_workaround(struct iwl_mvm *mvm,
0879                      struct ieee80211_sta *sta, int tid,
0880                      struct iwl_mvm_reorder_buffer *buffer,
0881                      u32 reorder, u32 gp2, int queue)
0882 {
0883     struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
0884
0885     if (gp2 != buffer->consec_oldsn_ampdu_gp2) {
0886         /* we have a new (A-)MPDU ... */
0887
0888         /*
0889          * reset counter to 0 if we didn't have any oldsn in
0890          * the last A-MPDU (as detected by GP2 being identical)
0891          */
0892         if (!buffer->consec_oldsn_prev_drop)
0893             buffer->consec_oldsn_drops = 0;
0894
0895         /* either way, update our tracking state */
0896         buffer->consec_oldsn_ampdu_gp2 = gp2;
0897     } else if (buffer->consec_oldsn_prev_drop) {
0898         /*
0899          * tracking state didn't change, and we had an old SN
0900          * indication before - do nothing in this case, we
0901          * already noted this one down and are waiting for the
0902          * next A-MPDU (by GP2)
0903          */
0904         return;
0905     }
0906
0907     /* return unless this MPDU has old SN */
0908     if (!(reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN))
0909         return;
0910
0911     /* update state */
0912     buffer->consec_oldsn_prev_drop = 1;
0913     buffer->consec_oldsn_drops++;
0914
0915     /* if limit is reached, send del BA and reset state */
0916     if (buffer->consec_oldsn_drops == IWL_MVM_AMPDU_CONSEC_DROPS_DELBA) {
0917         IWL_WARN(mvm,
0918              "reached %d old SN frames from %pM on queue %d, stopping BA session on TID %d\n",
0919              IWL_MVM_AMPDU_CONSEC_DROPS_DELBA,
0920              sta->addr, queue, tid);
0921         ieee80211_stop_rx_ba_session(mvmsta->vif, BIT(tid), sta->addr);
0922         buffer->consec_oldsn_prev_drop = 0;
0923         buffer->consec_oldsn_drops = 0;
0924     }
0925 }
0926
0927 /*
0928  * Returns true if the MPDU was buffered\dropped, false if it should be passed
0929  * to upper layer.
0930  */
0931 static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
0932                 struct napi_struct *napi,
0933                 int queue,
0934                 struct ieee80211_sta *sta,
0935                 struct sk_buff *skb,
0936                 struct iwl_rx_mpdu_desc *desc)
0937 {
0938     struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
0939     struct ieee80211_hdr *hdr = iwl_mvm_skb_get_hdr(skb);
0940     struct iwl_mvm_sta *mvm_sta;
0941     struct iwl_mvm_baid_data *baid_data;
0942     struct iwl_mvm_reorder_buffer *buffer;
0943     struct sk_buff *tail;
0944     u32 reorder = le32_to_cpu(desc->reorder_data);
0945     bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
0946     bool last_subframe =
0947         desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
0948     u8 tid = ieee80211_get_tid(hdr);
0949     u8 sub_frame_idx = desc->amsdu_info &
0950                IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
0951     struct iwl_mvm_reorder_buf_entry *entries;
0952     int index;
0953     u16 nssn, sn;
0954     u8 baid;
0955
0956     baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
0957         IWL_RX_MPDU_REORDER_BAID_SHIFT;
0958
0959     /*
0960      * This also covers the case of receiving a Block Ack Request
0961      * outside a BA session; we'll pass it to mac80211 and that
0962      * then sends a delBA action frame.
0963      * This also covers pure monitor mode, in which case we won't
0964      * have any BA sessions.
0965      */
0966     if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
0967         return false;
0968
0969     /* no sta yet */
0970     if (WARN_ONCE(IS_ERR_OR_NULL(sta),
0971               "Got valid BAID without a valid station assigned\n"))
0972         return false;
0973
0974     mvm_sta = iwl_mvm_sta_from_mac80211(sta);
0975
0976     /* not a data packet or a bar */
0977     if (!ieee80211_is_back_req(hdr->frame_control) &&
0978         (!ieee80211_is_data_qos(hdr->frame_control) ||
0979          is_multicast_ether_addr(hdr->addr1)))
0980         return false;
0981
0982     if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
0983         return false;
0984
0985     baid_data = rcu_dereference(mvm->baid_map[baid]);
0986     if (!baid_data) {
0987         IWL_DEBUG_RX(mvm,
0988                  "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
0989                   baid, reorder);
0990         return false;
0991     }
0992
0993     if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
0994          "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
0995          baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
0996          tid))
0997         return false;
0998
0999     nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
1000     sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
1001         IWL_RX_MPDU_REORDER_SN_SHIFT;
1002
1003     buffer = &baid_data->reorder_buf[queue];
1004     entries = &baid_data->entries[queue * baid_data->entries_per_queue];
1005
1006     spin_lock_bh(&buffer->lock);
1007
1008     if (!buffer->valid) {
1009         if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
1010             spin_unlock_bh(&buffer->lock);
1011             return false;
1012         }
1013         buffer->valid = true;
1014     }
1015
1016     if (ieee80211_is_back_req(hdr->frame_control)) {
1017         iwl_mvm_release_frames(mvm, sta, napi, baid_data,
1018                        buffer, nssn, 0);
1019         goto drop;
1020     }
1021
1022     /*
1023      * If there was a significant jump in the nssn - adjust.
1024      * If the SN is smaller than the NSSN it might need to first go into
1025      * the reorder buffer, in which case we just release up to it and the
1026      * rest of the function will take care of storing it and releasing up to
1027      * the nssn.
1028      * This should not happen. This queue has been lagging and it should
1029      * have been updated by a IWL_MVM_RXQ_NSSN_SYNC notification. Be nice
1030      * and update the other queues.
1031      */
1032     if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
1033                 buffer->buf_size) ||
1034         !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
1035         u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
1036
1037         iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
1038                        min_sn, IWL_MVM_RELEASE_SEND_RSS_SYNC);
1039     }
1040
1041     iwl_mvm_oldsn_workaround(mvm, sta, tid, buffer, reorder,
1042                  rx_status->device_timestamp, queue);
1043
1044     /* drop any oudated packets */
1045     if (ieee80211_sn_less(sn, buffer->head_sn))
1046         goto drop;
1047
1048     /* release immediately if allowed by nssn and no stored frames */
1049     if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
1050         if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
1051                        buffer->buf_size) &&
1052            (!amsdu || last_subframe)) {
1053             /*
1054              * If we crossed the 2048 or 0 SN, notify all the
1055              * queues. This is done in order to avoid having a
1056              * head_sn that lags behind for too long. When that
1057              * happens, we can get to a situation where the head_sn
1058              * is within the interval [nssn - buf_size : nssn]
1059              * which will make us think that the nssn is a packet
1060              * that we already freed because of the reordering
1061              * buffer and we will ignore it. So maintain the
1062              * head_sn somewhat updated across all the queues:
1063              * when it crosses 0 and 2048.
1064              */
1065             if (sn == 2048 || sn == 0)
1066                 iwl_mvm_sync_nssn(mvm, baid, sn);
1067             buffer->head_sn = nssn;
1068         }
1069         /* No need to update AMSDU last SN - we are moving the head */
1070         spin_unlock_bh(&buffer->lock);
1071         return false;
1072     }
1073
1074     /*
1075      * release immediately if there are no stored frames, and the sn is
1076      * equal to the head.
1077      * This can happen due to reorder timer, where NSSN is behind head_sn.
1078      * When we released everything, and we got the next frame in the
1079      * sequence, according to the NSSN we can't release immediately,
1080      * while technically there is no hole and we can move forward.
1081      */
1082     if (!buffer->num_stored && sn == buffer->head_sn) {
1083         if (!amsdu || last_subframe) {
1084             if (sn == 2048 || sn == 0)
1085                 iwl_mvm_sync_nssn(mvm, baid, sn);
1086             buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
1087         }
1088         /* No need to update AMSDU last SN - we are moving the head */
1089         spin_unlock_bh(&buffer->lock);
1090         return false;
1091     }
1092
1093     index = sn % buffer->buf_size;
1094
1095     /*
1096      * Check if we already stored this frame
1097      * As AMSDU is either received or not as whole, logic is simple:
1098      * If we have frames in that position in the buffer and the last frame
1099      * originated from AMSDU had a different SN then it is a retransmission.
1100      * If it is the same SN then if the subframe index is incrementing it
1101      * is the same AMSDU - otherwise it is a retransmission.
1102      */
1103     tail = skb_peek_tail(&entries[index].e.frames);
1104     if (tail && !amsdu)
1105         goto drop;
1106     else if (tail && (sn != buffer->last_amsdu ||
1107               buffer->last_sub_index >= sub_frame_idx))
1108         goto drop;
1109
1110     /* put in reorder buffer */
1111     __skb_queue_tail(&entries[index].e.frames, skb);
1112     buffer->num_stored++;
1113     entries[index].e.reorder_time = jiffies;
1114
1115     if (amsdu) {
1116         buffer->last_amsdu = sn;
1117         buffer->last_sub_index = sub_frame_idx;
1118     }
1119
1120     /*
1121      * We cannot trust NSSN for AMSDU sub-frames that are not the last.
1122      * The reason is that NSSN advances on the first sub-frame, and may
1123      * cause the reorder buffer to advance before all the sub-frames arrive.
1124      * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
1125      * SN 1. NSSN for first sub frame will be 3 with the result of driver
1126      * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
1127      * already ahead and it will be dropped.
1128      * If the last sub-frame is not on this queue - we will get frame
1129      * release notification with up to date NSSN.
1130      */
1131     if (!amsdu || last_subframe)
1132         iwl_mvm_release_frames(mvm, sta, napi, baid_data,
1133                        buffer, nssn,
1134                        IWL_MVM_RELEASE_SEND_RSS_SYNC);
1135
1136     spin_unlock_bh(&buffer->lock);
1137     return true;
1138
1139 drop:
1140     kfree_skb(skb);
1141     spin_unlock_bh(&buffer->lock);
1142     return true;
1143 }
1144
1145 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
1146                     u32 reorder_data, u8 baid)
1147 {
1148     unsigned long now = jiffies;
1149     unsigned long timeout;
1150     struct iwl_mvm_baid_data *data;
1151
1152     rcu_read_lock();
1153
1154     data = rcu_dereference(mvm->baid_map[baid]);
1155     if (!data) {
1156         IWL_DEBUG_RX(mvm,
1157                  "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
1158                   baid, reorder_data);
1159         goto out;
1160     }
1161
1162     if (!data->timeout)
1163         goto out;
1164
1165     timeout = data->timeout;
1166     /*
1167      * Do not update last rx all the time to avoid cache bouncing
1168      * between the rx queues.
1169      * Update it every timeout. Worst case is the session will
1170      * expire after ~ 2 * timeout, which doesn't matter that much.
1171      */
1172     if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
1173         /* Update is atomic */
1174         data->last_rx = now;
1175
1176 out:
1177     rcu_read_unlock();
1178 }
1179
1180 static void iwl_mvm_flip_address(u8 *addr)
1181 {
1182     int i;
1183     u8 mac_addr[ETH_ALEN];
1184
1185     for (i = 0; i < ETH_ALEN; i++)
1186         mac_addr[i] = addr[ETH_ALEN - i - 1];
1187     ether_addr_copy(addr, mac_addr);
1188 }
1189
1190 struct iwl_mvm_rx_phy_data {
1191     enum iwl_rx_phy_info_type info_type;
1192     __le32 d0, d1, d2, d3;
1193     __le16 d4;
1194 };
1195
1196 static void iwl_mvm_decode_he_mu_ext(struct iwl_mvm *mvm,
1197                      struct iwl_mvm_rx_phy_data *phy_data,
1198                      u32 rate_n_flags,
1199                      struct ieee80211_radiotap_he_mu *he_mu)
1200 {
1201     u32 phy_data2 = le32_to_cpu(phy_data->d2);
1202     u32 phy_data3 = le32_to_cpu(phy_data->d3);
1203     u16 phy_data4 = le16_to_cpu(phy_data->d4);
1204
1205     if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CRC_OK, phy_data4)) {
1206         he_mu->flags1 |=
1207             cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN |
1208                     IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN);
1209
1210         he_mu->flags1 |=
1211             le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH1_CTR_RU,
1212                            phy_data4),
1213                      IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU);
1214
1215         he_mu->ru_ch1[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU0,
1216                          phy_data2);
1217         he_mu->ru_ch1[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1,
1218                          phy_data3);
1219         he_mu->ru_ch1[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH1_RU2,
1220                          phy_data2);
1221         he_mu->ru_ch1[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU3,
1222                          phy_data3);
1223     }
1224
1225     if (FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CRC_OK, phy_data4) &&
1226         (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) != RATE_MCS_CHAN_WIDTH_20) {
1227         he_mu->flags1 |=
1228             cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN |
1229                     IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN);
1230
1231         he_mu->flags2 |=
1232             le16_encode_bits(FIELD_GET(IWL_RX_PHY_DATA4_HE_MU_EXT_CH2_CTR_RU,
1233                            phy_data4),
1234                      IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU);
1235
1236         he_mu->ru_ch2[0] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU0,
1237                          phy_data2);
1238         he_mu->ru_ch2[1] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU1,
1239                          phy_data3);
1240         he_mu->ru_ch2[2] = FIELD_GET(IWL_RX_PHY_DATA2_HE_MU_EXT_CH2_RU2,
1241                          phy_data2);
1242         he_mu->ru_ch2[3] = FIELD_GET(IWL_RX_PHY_DATA3_HE_MU_EXT_CH2_RU3,
1243                          phy_data3);
1244     }
1245 }
1246
1247 static void
1248 iwl_mvm_decode_he_phy_ru_alloc(struct iwl_mvm_rx_phy_data *phy_data,
1249                    u32 rate_n_flags,
1250                    struct ieee80211_radiotap_he *he,
1251                    struct ieee80211_radiotap_he_mu *he_mu,
1252                    struct ieee80211_rx_status *rx_status)
1253 {
1254     /*
1255      * Unfortunately, we have to leave the mac80211 data
1256      * incorrect for the case that we receive an HE-MU
1257      * transmission and *don't* have the HE phy data (due
1258      * to the bits being used for TSF). This shouldn't
1259      * happen though as management frames where we need
1260      * the TSF/timers are not be transmitted in HE-MU.
1261      */
1262     u8 ru = le32_get_bits(phy_data->d1, IWL_RX_PHY_DATA1_HE_RU_ALLOC_MASK);
1263     u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK_V1;
1264     u8 offs = 0;
1265
1266     rx_status->bw = RATE_INFO_BW_HE_RU;
1267
1268     he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
1269
1270     switch (ru) {
1271     case 0 ... 36:
1272         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
1273         offs = ru;
1274         break;
1275     case 37 ... 52:
1276         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
1277         offs = ru - 37;
1278         break;
1279     case 53 ... 60:
1280         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
1281         offs = ru - 53;
1282         break;
1283     case 61 ... 64:
1284         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
1285         offs = ru - 61;
1286         break;
1287     case 65 ... 66:
1288         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
1289         offs = ru - 65;
1290         break;
1291     case 67:
1292         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
1293         break;
1294     case 68:
1295         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
1296         break;
1297     }
1298     he->data2 |= le16_encode_bits(offs,
1299                       IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
1300     he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN |
1301                  IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN);
1302     if (phy_data->d1 & cpu_to_le32(IWL_RX_PHY_DATA1_HE_RU_ALLOC_SEC80))
1303         he->data2 |=
1304             cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC);
1305
1306 #define CHECK_BW(bw) \
1307     BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_ ## bw ## MHZ != \
1308              RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS); \
1309     BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_ ## bw ## MHZ != \
1310              RATE_MCS_CHAN_WIDTH_##bw >> RATE_MCS_CHAN_WIDTH_POS)
1311     CHECK_BW(20);
1312     CHECK_BW(40);
1313     CHECK_BW(80);
1314     CHECK_BW(160);
1315
1316     if (he_mu)
1317         he_mu->flags2 |=
1318             le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1,
1319                            rate_n_flags),
1320                      IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW);
1321     else if (he_type == RATE_MCS_HE_TYPE_TRIG_V1)
1322         he->data6 |=
1323             cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW_KNOWN) |
1324             le16_encode_bits(FIELD_GET(RATE_MCS_CHAN_WIDTH_MSK_V1,
1325                            rate_n_flags),
1326                      IEEE80211_RADIOTAP_HE_DATA6_TB_PPDU_BW);
1327 }
1328
1329 static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm,
1330                        struct iwl_mvm_rx_phy_data *phy_data,
1331                        struct ieee80211_radiotap_he *he,
1332                        struct ieee80211_radiotap_he_mu *he_mu,
1333                        struct ieee80211_rx_status *rx_status,
1334                        u32 rate_n_flags, int queue)
1335 {
1336     switch (phy_data->info_type) {
1337     case IWL_RX_PHY_INFO_TYPE_NONE:
1338     case IWL_RX_PHY_INFO_TYPE_CCK:
1339     case IWL_RX_PHY_INFO_TYPE_OFDM_LGCY:
1340     case IWL_RX_PHY_INFO_TYPE_HT:
1341     case IWL_RX_PHY_INFO_TYPE_VHT_SU:
1342     case IWL_RX_PHY_INFO_TYPE_VHT_MU:
1343         return;
1344     case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT:
1345         he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN |
1346                      IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN |
1347                      IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN |
1348                      IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN);
1349         he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1350                                 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE1),
1351                           IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1);
1352         he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1353                                 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE2),
1354                           IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2);
1355         he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1356                                 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE3),
1357                           IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3);
1358         he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d2,
1359                                 IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4),
1360                           IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4);
1361         fallthrough;
1362     case IWL_RX_PHY_INFO_TYPE_HE_SU:
1363     case IWL_RX_PHY_INFO_TYPE_HE_MU:
1364     case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1365     case IWL_RX_PHY_INFO_TYPE_HE_TB:
1366         /* HE common */
1367         he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN |
1368                      IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN |
1369                      IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN);
1370         he->data2 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN |
1371                      IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN |
1372                      IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN |
1373                      IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN);
1374         he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1375                                 IWL_RX_PHY_DATA0_HE_BSS_COLOR_MASK),
1376                           IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR);
1377         if (phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB &&
1378             phy_data->info_type != IWL_RX_PHY_INFO_TYPE_HE_TB_EXT) {
1379             he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN);
1380             he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1381                                 IWL_RX_PHY_DATA0_HE_UPLINK),
1382                               IEEE80211_RADIOTAP_HE_DATA3_UL_DL);
1383         }
1384         he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1385                                 IWL_RX_PHY_DATA0_HE_LDPC_EXT_SYM),
1386                           IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG);
1387         he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1388                                 IWL_RX_PHY_DATA0_HE_PRE_FEC_PAD_MASK),
1389                           IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD);
1390         he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1391                                 IWL_RX_PHY_DATA0_HE_PE_DISAMBIG),
1392                           IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG);
1393         he->data5 |= le16_encode_bits(le32_get_bits(phy_data->d1,
1394                                 IWL_RX_PHY_DATA1_HE_LTF_NUM_MASK),
1395                           IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS);
1396         he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1397                                 IWL_RX_PHY_DATA0_HE_TXOP_DUR_MASK),
1398                           IEEE80211_RADIOTAP_HE_DATA6_TXOP);
1399         he->data6 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1400                                 IWL_RX_PHY_DATA0_HE_DOPPLER),
1401                           IEEE80211_RADIOTAP_HE_DATA6_DOPPLER);
1402         break;
1403     }
1404
1405     switch (phy_data->info_type) {
1406     case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1407     case IWL_RX_PHY_INFO_TYPE_HE_MU:
1408     case IWL_RX_PHY_INFO_TYPE_HE_SU:
1409         he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN);
1410         he->data4 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1411                                 IWL_RX_PHY_DATA0_HE_SPATIAL_REUSE_MASK),
1412                           IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE);
1413         break;
1414     default:
1415         /* nothing here */
1416         break;
1417     }
1418
1419     switch (phy_data->info_type) {
1420     case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1421         he_mu->flags1 |=
1422             le16_encode_bits(le16_get_bits(phy_data->d4,
1423                                IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_DCM),
1424                      IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM);
1425         he_mu->flags1 |=
1426             le16_encode_bits(le16_get_bits(phy_data->d4,
1427                                IWL_RX_PHY_DATA4_HE_MU_EXT_SIGB_MCS_MASK),
1428                      IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS);
1429         he_mu->flags2 |=
1430             le16_encode_bits(le16_get_bits(phy_data->d4,
1431                                IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK),
1432                      IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW);
1433         iwl_mvm_decode_he_mu_ext(mvm, phy_data, rate_n_flags, he_mu);
1434         fallthrough;
1435     case IWL_RX_PHY_INFO_TYPE_HE_MU:
1436         he_mu->flags2 |=
1437             le16_encode_bits(le32_get_bits(phy_data->d1,
1438                                IWL_RX_PHY_DATA1_HE_MU_SIBG_SYM_OR_USER_NUM_MASK),
1439                      IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS);
1440         he_mu->flags2 |=
1441             le16_encode_bits(le32_get_bits(phy_data->d1,
1442                                IWL_RX_PHY_DATA1_HE_MU_SIGB_COMPRESSION),
1443                      IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP);
1444         fallthrough;
1445     case IWL_RX_PHY_INFO_TYPE_HE_TB:
1446     case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT:
1447         iwl_mvm_decode_he_phy_ru_alloc(phy_data, rate_n_flags,
1448                            he, he_mu, rx_status);
1449         break;
1450     case IWL_RX_PHY_INFO_TYPE_HE_SU:
1451         he->data1 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN);
1452         he->data3 |= le16_encode_bits(le32_get_bits(phy_data->d0,
1453                                 IWL_RX_PHY_DATA0_HE_BEAM_CHNG),
1454                           IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE);
1455         break;
1456     default:
1457         /* nothing */
1458         break;
1459     }
1460 }
1461
1462 static void iwl_mvm_rx_he(struct iwl_mvm *mvm, struct sk_buff *skb,
1463               struct iwl_mvm_rx_phy_data *phy_data,
1464               u32 rate_n_flags, u16 phy_info, int queue)
1465 {
1466     struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1467     struct ieee80211_radiotap_he *he = NULL;
1468     struct ieee80211_radiotap_he_mu *he_mu = NULL;
1469     u32 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK;
1470     u8 stbc, ltf;
1471     static const struct ieee80211_radiotap_he known = {
1472         .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
1473                      IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
1474                      IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN |
1475                      IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN),
1476         .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN |
1477                      IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN),
1478     };
1479     static const struct ieee80211_radiotap_he_mu mu_known = {
1480         .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN |
1481                       IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN |
1482                       IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN |
1483                       IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN),
1484         .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN |
1485                       IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN),
1486     };
1487
1488     he = skb_put_data(skb, &known, sizeof(known));
1489     rx_status->flag |= RX_FLAG_RADIOTAP_HE;
1490
1491     if (phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU ||
1492         phy_data->info_type == IWL_RX_PHY_INFO_TYPE_HE_MU_EXT) {
1493         he_mu = skb_put_data(skb, &mu_known, sizeof(mu_known));
1494         rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU;
1495     }
1496
1497     /* report the AMPDU-EOF bit on single frames */
1498     if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1499         rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
1500         rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
1501         if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF))
1502             rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT;
1503     }
1504
1505     if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD)
1506         iwl_mvm_decode_he_phy_data(mvm, phy_data, he, he_mu, rx_status,
1507                        rate_n_flags, queue);
1508
1509     /* update aggregation data for monitor sake on default queue */
1510     if (!queue && (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) &&
1511         (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1512         bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
1513
1514         /* toggle is switched whenever new aggregation starts */
1515         if (toggle_bit != mvm->ampdu_toggle) {
1516             rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
1517             if (phy_data->d0 & cpu_to_le32(IWL_RX_PHY_DATA0_HE_DELIM_EOF))
1518                 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT;
1519         }
1520     }
1521
1522     if (he_type == RATE_MCS_HE_TYPE_EXT_SU &&
1523         rate_n_flags & RATE_MCS_HE_106T_MSK) {
1524         rx_status->bw = RATE_INFO_BW_HE_RU;
1525         rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
1526     }
1527
1528     /* actually data is filled in mac80211 */
1529     if (he_type == RATE_MCS_HE_TYPE_SU ||
1530         he_type == RATE_MCS_HE_TYPE_EXT_SU)
1531         he->data1 |=
1532             cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
1533
1534     stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS;
1535     rx_status->nss =
1536         ((rate_n_flags & RATE_MCS_NSS_MSK) >>
1537          RATE_MCS_NSS_POS) + 1;
1538     rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK;
1539     rx_status->encoding = RX_ENC_HE;
1540     rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1541     if (rate_n_flags & RATE_MCS_BF_MSK)
1542         rx_status->enc_flags |= RX_ENC_FLAG_BF;
1543
1544     rx_status->he_dcm =
1545         !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK);
1546
1547 #define CHECK_TYPE(F)                           \
1548     BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F !=    \
1549              (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS))
1550
1551     CHECK_TYPE(SU);
1552     CHECK_TYPE(EXT_SU);
1553     CHECK_TYPE(MU);
1554     CHECK_TYPE(TRIG);
1555
1556     he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS);
1557
1558     if (rate_n_flags & RATE_MCS_BF_MSK)
1559         he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF);
1560
1561     switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >>
1562         RATE_MCS_HE_GI_LTF_POS) {
1563     case 0:
1564         if (he_type == RATE_MCS_HE_TYPE_TRIG)
1565             rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1566         else
1567             rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1568         if (he_type == RATE_MCS_HE_TYPE_MU)
1569             ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1570         else
1571             ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X;
1572         break;
1573     case 1:
1574         if (he_type == RATE_MCS_HE_TYPE_TRIG)
1575             rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1576         else
1577             rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1578         ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X;
1579         break;
1580     case 2:
1581         if (he_type == RATE_MCS_HE_TYPE_TRIG) {
1582             rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2;
1583             ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1584         } else {
1585             rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1586             ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X;
1587         }
1588         break;
1589     case 3:
1590         rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2;
1591         ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1592         break;
1593     case 4:
1594         rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1595         ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X;
1596         break;
1597     default:
1598         ltf = IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_UNKNOWN;
1599     }
1600
1601     he->data5 |= le16_encode_bits(ltf,
1602                       IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE);
1603 }
1604
1605 static void iwl_mvm_decode_lsig(struct sk_buff *skb,
1606                 struct iwl_mvm_rx_phy_data *phy_data)
1607 {
1608     struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1609     struct ieee80211_radiotap_lsig *lsig;
1610
1611     switch (phy_data->info_type) {
1612     case IWL_RX_PHY_INFO_TYPE_HT:
1613     case IWL_RX_PHY_INFO_TYPE_VHT_SU:
1614     case IWL_RX_PHY_INFO_TYPE_VHT_MU:
1615     case IWL_RX_PHY_INFO_TYPE_HE_TB_EXT:
1616     case IWL_RX_PHY_INFO_TYPE_HE_SU:
1617     case IWL_RX_PHY_INFO_TYPE_HE_MU:
1618     case IWL_RX_PHY_INFO_TYPE_HE_MU_EXT:
1619     case IWL_RX_PHY_INFO_TYPE_HE_TB:
1620         lsig = skb_put(skb, sizeof(*lsig));
1621         lsig->data1 = cpu_to_le16(IEEE80211_RADIOTAP_LSIG_DATA1_LENGTH_KNOWN);
1622         lsig->data2 = le16_encode_bits(le32_get_bits(phy_data->d1,
1623                                  IWL_RX_PHY_DATA1_LSIG_LEN_MASK),
1624                            IEEE80211_RADIOTAP_LSIG_DATA2_LENGTH);
1625         rx_status->flag |= RX_FLAG_RADIOTAP_LSIG;
1626         break;
1627     default:
1628         break;
1629     }
1630 }
1631
1632 static inline u8 iwl_mvm_nl80211_band_from_rx_msdu(u8 phy_band)
1633 {
1634     switch (phy_band) {
1635     case PHY_BAND_24:
1636         return NL80211_BAND_2GHZ;
1637     case PHY_BAND_5:
1638         return NL80211_BAND_5GHZ;
1639     case PHY_BAND_6:
1640         return NL80211_BAND_6GHZ;
1641     default:
1642         WARN_ONCE(1, "Unsupported phy band (%u)\n", phy_band);
1643         return NL80211_BAND_5GHZ;
1644     }
1645 }
1646
1647 struct iwl_rx_sta_csa {
1648     bool all_sta_unblocked;
1649     struct ieee80211_vif *vif;
1650 };
1651
1652 static void iwl_mvm_rx_get_sta_block_tx(void *data, struct ieee80211_sta *sta)
1653 {
1654     struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1655     struct iwl_rx_sta_csa *rx_sta_csa = data;
1656
1657     if (mvmsta->vif != rx_sta_csa->vif)
1658         return;
1659
1660     if (mvmsta->disable_tx)
1661         rx_sta_csa->all_sta_unblocked = false;
1662 }
1663
1664 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
1665             struct iwl_rx_cmd_buffer *rxb, int queue)
1666 {
1667     struct ieee80211_rx_status *rx_status;
1668     struct iwl_rx_packet *pkt = rxb_addr(rxb);
1669     struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
1670     struct ieee80211_hdr *hdr;
1671     u32 len;
1672     u32 pkt_len = iwl_rx_packet_payload_len(pkt);
1673     u32 rate_n_flags, gp2_on_air_rise;
1674     u16 phy_info;
1675     struct ieee80211_sta *sta = NULL;
1676     struct sk_buff *skb;
1677     u8 crypt_len = 0, channel, energy_a, energy_b;
1678     size_t desc_size;
1679     struct iwl_mvm_rx_phy_data phy_data = {
1680         .info_type = IWL_RX_PHY_INFO_TYPE_NONE,
1681     };
1682     u32 format;
1683     bool is_sgi;
1684
1685     if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
1686         return;
1687
1688     if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1689         desc_size = sizeof(*desc);
1690     else
1691         desc_size = IWL_RX_DESC_SIZE_V1;
1692
1693     if (unlikely(pkt_len < desc_size)) {
1694         IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
1695         return;
1696     }
1697
1698     if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
1699         rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags);
1700         channel = desc->v3.channel;
1701         gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise);
1702         energy_a = desc->v3.energy_a;
1703         energy_b = desc->v3.energy_b;
1704
1705         phy_data.d0 = desc->v3.phy_data0;
1706         phy_data.d1 = desc->v3.phy_data1;
1707         phy_data.d2 = desc->v3.phy_data2;
1708         phy_data.d3 = desc->v3.phy_data3;
1709     } else {
1710         rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags);
1711         channel = desc->v1.channel;
1712         gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise);
1713         energy_a = desc->v1.energy_a;
1714         energy_b = desc->v1.energy_b;
1715
1716         phy_data.d0 = desc->v1.phy_data0;
1717         phy_data.d1 = desc->v1.phy_data1;
1718         phy_data.d2 = desc->v1.phy_data2;
1719         phy_data.d3 = desc->v1.phy_data3;
1720     }
1721     if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
1722                     REPLY_RX_MPDU_CMD, 0) < 4) {
1723         rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1724         IWL_DEBUG_DROP(mvm, "Got old format rate, converting. New rate: 0x%x\n",
1725                    rate_n_flags);
1726     }
1727     format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1728
1729     len = le16_to_cpu(desc->mpdu_len);
1730
1731     if (unlikely(len + desc_size > pkt_len)) {
1732         IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
1733         return;
1734     }
1735
1736     phy_info = le16_to_cpu(desc->phy_info);
1737     phy_data.d4 = desc->phy_data4;
1738
1739     if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD)
1740         phy_data.info_type =
1741             le32_get_bits(phy_data.d1,
1742                       IWL_RX_PHY_DATA1_INFO_TYPE_MASK);
1743
1744     hdr = (void *)(pkt->data + desc_size);
1745     /* Dont use dev_alloc_skb(), we'll have enough headroom once
1746      * ieee80211_hdr pulled.
1747      */
1748     skb = alloc_skb(128, GFP_ATOMIC);
1749     if (!skb) {
1750         IWL_ERR(mvm, "alloc_skb failed\n");
1751         return;
1752     }
1753
1754     if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
1755         /*
1756          * If the device inserted padding it means that (it thought)
1757          * the 802.11 header wasn't a multiple of 4 bytes long. In
1758          * this case, reserve two bytes at the start of the SKB to
1759          * align the payload properly in case we end up copying it.
1760          */
1761         skb_reserve(skb, 2);
1762     }
1763
1764     rx_status = IEEE80211_SKB_RXCB(skb);
1765
1766     /* This may be overridden by iwl_mvm_rx_he() to HE_RU */
1767     switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1768     case RATE_MCS_CHAN_WIDTH_20:
1769         break;
1770     case RATE_MCS_CHAN_WIDTH_40:
1771         rx_status->bw = RATE_INFO_BW_40;
1772         break;
1773     case RATE_MCS_CHAN_WIDTH_80:
1774         rx_status->bw = RATE_INFO_BW_80;
1775         break;
1776     case RATE_MCS_CHAN_WIDTH_160:
1777         rx_status->bw = RATE_INFO_BW_160;
1778         break;
1779     }
1780
1781     if (format == RATE_MCS_HE_MSK)
1782         iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags,
1783                   phy_info, queue);
1784
1785     iwl_mvm_decode_lsig(skb, &phy_data);
1786
1787     /*
1788      * Keep packets with CRC errors (and with overrun) for monitor mode
1789      * (otherwise the firmware discards them) but mark them as bad.
1790      */
1791     if (!(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_CRC_OK)) ||
1792         !(desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
1793         IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
1794                  le32_to_cpu(desc->status));
1795         rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
1796     }
1797     /* set the preamble flag if appropriate */
1798     if (format == RATE_MCS_CCK_MSK &&
1799         phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
1800         rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1801
1802     if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
1803         u64 tsf_on_air_rise;
1804
1805         if (mvm->trans->trans_cfg->device_family >=
1806             IWL_DEVICE_FAMILY_AX210)
1807             tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise);
1808         else
1809             tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise);
1810
1811         rx_status->mactime = tsf_on_air_rise;
1812         /* TSF as indicated by the firmware is at INA time */
1813         rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
1814     }
1815
1816     rx_status->device_timestamp = gp2_on_air_rise;
1817     if (iwl_mvm_is_band_in_rx_supported(mvm)) {
1818         u8 band = BAND_IN_RX_STATUS(desc->mac_phy_idx);
1819
1820         rx_status->band = iwl_mvm_nl80211_band_from_rx_msdu(band);
1821     } else {
1822         rx_status->band = channel > 14 ? NL80211_BAND_5GHZ :
1823             NL80211_BAND_2GHZ;
1824     }
1825     rx_status->freq = ieee80211_channel_to_frequency(channel,
1826                              rx_status->band);
1827     iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a,
1828                     energy_b);
1829
1830     /* update aggregation data for monitor sake on default queue */
1831     if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1832         bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
1833
1834         rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
1835         /*
1836          * Toggle is switched whenever new aggregation starts. Make
1837          * sure ampdu_reference is never 0 so we can later use it to
1838          * see if the frame was really part of an A-MPDU or not.
1839          */
1840         if (toggle_bit != mvm->ampdu_toggle) {
1841             mvm->ampdu_ref++;
1842             if (mvm->ampdu_ref == 0)
1843                 mvm->ampdu_ref++;
1844             mvm->ampdu_toggle = toggle_bit;
1845         }
1846         rx_status->ampdu_reference = mvm->ampdu_ref;
1847     }
1848
1849     if (unlikely(mvm->monitor_on))
1850         iwl_mvm_add_rtap_sniffer_config(mvm, skb);
1851
1852     rcu_read_lock();
1853
1854     if (desc->status & cpu_to_le32(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
1855         u8 id = le32_get_bits(desc->status, IWL_RX_MPDU_STATUS_STA_ID);
1856
1857         if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
1858             sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
1859             if (IS_ERR(sta))
1860                 sta = NULL;
1861         }
1862     } else if (!is_multicast_ether_addr(hdr->addr2)) {
1863         /*
1864          * This is fine since we prevent two stations with the same
1865          * address from being added.
1866          */
1867         sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
1868     }
1869
1870     if (iwl_mvm_rx_crypto(mvm, sta, hdr, rx_status, phy_info, desc,
1871                   le32_to_cpu(pkt->len_n_flags), queue,
1872                   &crypt_len)) {
1873         kfree_skb(skb);
1874         goto out;
1875     }
1876
1877     if (sta) {
1878         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1879         struct ieee80211_vif *tx_blocked_vif =
1880             rcu_dereference(mvm->csa_tx_blocked_vif);
1881         u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
1882                    IWL_RX_MPDU_REORDER_BAID_MASK) >>
1883                    IWL_RX_MPDU_REORDER_BAID_SHIFT);
1884         struct iwl_fw_dbg_trigger_tlv *trig;
1885         struct ieee80211_vif *vif = mvmsta->vif;
1886
1887         if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
1888             !is_multicast_ether_addr(hdr->addr1) &&
1889             ieee80211_is_data(hdr->frame_control) &&
1890             time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1891             schedule_delayed_work(&mvm->tcm.work, 0);
1892
1893         /*
1894          * We have tx blocked stations (with CS bit). If we heard
1895          * frames from a blocked station on a new channel we can
1896          * TX to it again.
1897          */
1898         if (unlikely(tx_blocked_vif) && tx_blocked_vif == vif) {
1899             struct iwl_mvm_vif *mvmvif =
1900                 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1901             struct iwl_rx_sta_csa rx_sta_csa = {
1902                 .all_sta_unblocked = true,
1903                 .vif = tx_blocked_vif,
1904             };
1905
1906             if (mvmvif->csa_target_freq == rx_status->freq)
1907                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
1908                                  false);
1909             ieee80211_iterate_stations_atomic(mvm->hw,
1910                               iwl_mvm_rx_get_sta_block_tx,
1911                               &rx_sta_csa);
1912
1913             if (rx_sta_csa.all_sta_unblocked) {
1914                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1915                 /* Unblock BCAST / MCAST station */
1916                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1917                 cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1918             }
1919         }
1920
1921         rs_update_last_rssi(mvm, mvmsta, rx_status);
1922
1923         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
1924                          ieee80211_vif_to_wdev(vif),
1925                          FW_DBG_TRIGGER_RSSI);
1926
1927         if (trig && ieee80211_is_beacon(hdr->frame_control)) {
1928             struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
1929             s32 rssi;
1930
1931             rssi_trig = (void *)trig->data;
1932             rssi = le32_to_cpu(rssi_trig->rssi);
1933
1934             if (rx_status->signal < rssi)
1935                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1936                             NULL);
1937         }
1938
1939         if (ieee80211_is_data(hdr->frame_control))
1940             iwl_mvm_rx_csum(mvm, sta, skb, pkt);
1941
1942         if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) {
1943             kfree_skb(skb);
1944             goto out;
1945         }
1946
1947         /*
1948          * Our hardware de-aggregates AMSDUs but copies the mac header
1949          * as it to the de-aggregated MPDUs. We need to turn off the
1950          * AMSDU bit in the QoS control ourselves.
1951          * In addition, HW reverses addr3 and addr4 - reverse it back.
1952          */
1953         if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
1954             !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
1955             u8 *qc = ieee80211_get_qos_ctl(hdr);
1956
1957             *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1958
1959             if (mvm->trans->trans_cfg->device_family ==
1960                 IWL_DEVICE_FAMILY_9000) {
1961                 iwl_mvm_flip_address(hdr->addr3);
1962
1963                 if (ieee80211_has_a4(hdr->frame_control))
1964                     iwl_mvm_flip_address(hdr->addr4);
1965             }
1966         }
1967         if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
1968             u32 reorder_data = le32_to_cpu(desc->reorder_data);
1969
1970             iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
1971         }
1972     }
1973
1974     is_sgi = format == RATE_MCS_HE_MSK ?
1975         iwl_he_is_sgi(rate_n_flags) :
1976         rate_n_flags & RATE_MCS_SGI_MSK;
1977
1978     if (!(format == RATE_MCS_CCK_MSK) && is_sgi)
1979         rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1980     if (rate_n_flags & RATE_MCS_LDPC_MSK)
1981         rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1982     if (format == RATE_MCS_HT_MSK) {
1983         u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1984             RATE_MCS_STBC_POS;
1985         rx_status->encoding = RX_ENC_HT;
1986         rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags);
1987         rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1988     } else if (format == RATE_MCS_VHT_MSK) {
1989         u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1990             RATE_MCS_STBC_POS;
1991         rx_status->nss = ((rate_n_flags & RATE_MCS_NSS_MSK) >>
1992             RATE_MCS_NSS_POS) + 1;
1993         rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK;
1994         rx_status->encoding = RX_ENC_VHT;
1995         rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1996         if (rate_n_flags & RATE_MCS_BF_MSK)
1997             rx_status->enc_flags |= RX_ENC_FLAG_BF;
1998     } else if (!(format == RATE_MCS_HE_MSK)) {
1999         int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
2000                                  rx_status->band);
2001
2002         if (WARN(rate < 0 || rate > 0xFF,
2003              "Invalid rate flags 0x%x, band %d,\n",
2004              rate_n_flags, rx_status->band)) {
2005             kfree_skb(skb);
2006             goto out;
2007         }
2008         rx_status->rate_idx = rate;
2009     }
2010
2011     /* management stuff on default queue */
2012     if (!queue) {
2013         if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
2014                   ieee80211_is_probe_resp(hdr->frame_control)) &&
2015                  mvm->sched_scan_pass_all ==
2016                  SCHED_SCAN_PASS_ALL_ENABLED))
2017             mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
2018
2019         if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
2020                  ieee80211_is_probe_resp(hdr->frame_control)))
2021             rx_status->boottime_ns = ktime_get_boottime_ns();
2022     }
2023
2024     if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) {
2025         kfree_skb(skb);
2026         goto out;
2027     }
2028
2029     if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
2030         iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue,
2031                         sta);
2032 out:
2033     rcu_read_unlock();
2034 }
2035
2036 void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi,
2037                 struct iwl_rx_cmd_buffer *rxb, int queue)
2038 {
2039     struct ieee80211_rx_status *rx_status;
2040     struct iwl_rx_packet *pkt = rxb_addr(rxb);
2041     struct iwl_rx_no_data *desc = (void *)pkt->data;
2042     u32 rate_n_flags = le32_to_cpu(desc->rate);
2043     u32 gp2_on_air_rise = le32_to_cpu(desc->on_air_rise_time);
2044     u32 rssi = le32_to_cpu(desc->rssi);
2045     u32 info_type = le32_to_cpu(desc->info) & RX_NO_DATA_INFO_TYPE_MSK;
2046     u16 phy_info = IWL_RX_MPDU_PHY_TSF_OVERLOAD;
2047     struct ieee80211_sta *sta = NULL;
2048     struct sk_buff *skb;
2049     u8 channel, energy_a, energy_b;
2050     u32 format;
2051     struct iwl_mvm_rx_phy_data phy_data = {
2052         .info_type = le32_get_bits(desc->phy_info[1],
2053                        IWL_RX_PHY_DATA1_INFO_TYPE_MASK),
2054         .d0 = desc->phy_info[0],
2055         .d1 = desc->phy_info[1],
2056     };
2057     bool is_sgi;
2058
2059     if (iwl_fw_lookup_notif_ver(mvm->fw, DATA_PATH_GROUP,
2060                     RX_NO_DATA_NOTIF, 0) < 2) {
2061         IWL_DEBUG_DROP(mvm, "Got an old rate format. Old rate: 0x%x\n",
2062                    rate_n_flags);
2063         rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
2064         IWL_DEBUG_DROP(mvm, " Rate after conversion to the new format: 0x%x\n",
2065                    rate_n_flags);
2066     }
2067     format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
2068
2069     if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*desc)))
2070         return;
2071
2072     if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
2073         return;
2074
2075     energy_a = (rssi & RX_NO_DATA_CHAIN_A_MSK) >> RX_NO_DATA_CHAIN_A_POS;
2076     energy_b = (rssi & RX_NO_DATA_CHAIN_B_MSK) >> RX_NO_DATA_CHAIN_B_POS;
2077     channel = (rssi & RX_NO_DATA_CHANNEL_MSK) >> RX_NO_DATA_CHANNEL_POS;
2078
2079     /* Dont use dev_alloc_skb(), we'll have enough headroom once
2080      * ieee80211_hdr pulled.
2081      */
2082     skb = alloc_skb(128, GFP_ATOMIC);
2083     if (!skb) {
2084         IWL_ERR(mvm, "alloc_skb failed\n");
2085         return;
2086     }
2087
2088     rx_status = IEEE80211_SKB_RXCB(skb);
2089
2090     /* 0-length PSDU */
2091     rx_status->flag |= RX_FLAG_NO_PSDU;
2092
2093     switch (info_type) {
2094     case RX_NO_DATA_INFO_TYPE_NDP:
2095         rx_status->zero_length_psdu_type =
2096             IEEE80211_RADIOTAP_ZERO_LEN_PSDU_SOUNDING;
2097         break;
2098     case RX_NO_DATA_INFO_TYPE_MU_UNMATCHED:
2099     case RX_NO_DATA_INFO_TYPE_HE_TB_UNMATCHED:
2100         rx_status->zero_length_psdu_type =
2101             IEEE80211_RADIOTAP_ZERO_LEN_PSDU_NOT_CAPTURED;
2102         break;
2103     default:
2104         rx_status->zero_length_psdu_type =
2105             IEEE80211_RADIOTAP_ZERO_LEN_PSDU_VENDOR;
2106         break;
2107     }
2108
2109     /* This may be overridden by iwl_mvm_rx_he() to HE_RU */
2110     switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
2111     case RATE_MCS_CHAN_WIDTH_20:
2112         break;
2113     case RATE_MCS_CHAN_WIDTH_40:
2114         rx_status->bw = RATE_INFO_BW_40;
2115         break;
2116     case RATE_MCS_CHAN_WIDTH_80:
2117         rx_status->bw = RATE_INFO_BW_80;
2118         break;
2119     case RATE_MCS_CHAN_WIDTH_160:
2120         rx_status->bw = RATE_INFO_BW_160;
2121         break;
2122     }
2123
2124     if (format == RATE_MCS_HE_MSK)
2125         iwl_mvm_rx_he(mvm, skb, &phy_data, rate_n_flags,
2126                   phy_info, queue);
2127
2128     iwl_mvm_decode_lsig(skb, &phy_data);
2129
2130     rx_status->device_timestamp = gp2_on_air_rise;
2131     rx_status->band = channel > 14 ? NL80211_BAND_5GHZ :
2132         NL80211_BAND_2GHZ;
2133     rx_status->freq = ieee80211_channel_to_frequency(channel,
2134                              rx_status->band);
2135     iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a,
2136                     energy_b);
2137
2138     rcu_read_lock();
2139
2140     is_sgi = format == RATE_MCS_HE_MSK ?
2141         iwl_he_is_sgi(rate_n_flags) :
2142         rate_n_flags & RATE_MCS_SGI_MSK;
2143
2144     if (!(format == RATE_MCS_CCK_MSK) && is_sgi)
2145         rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
2146     if (rate_n_flags & RATE_MCS_LDPC_MSK)
2147         rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
2148     if (format == RATE_MCS_HT_MSK) {
2149         u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
2150                 RATE_MCS_STBC_POS;
2151         rx_status->encoding = RX_ENC_HT;
2152         rx_status->rate_idx = RATE_HT_MCS_INDEX(rate_n_flags);
2153         rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
2154     } else if (format == RATE_MCS_VHT_MSK) {
2155         u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
2156                 RATE_MCS_STBC_POS;
2157         rx_status->rate_idx = rate_n_flags & RATE_MCS_CODE_MSK;
2158         rx_status->encoding = RX_ENC_VHT;
2159         rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
2160         if (rate_n_flags & RATE_MCS_BF_MSK)
2161             rx_status->enc_flags |= RX_ENC_FLAG_BF;
2162         /*
2163          * take the nss from the rx_vec since the rate_n_flags has
2164          * only 2 bits for the nss which gives a max of 4 ss but
2165          * there may be up to 8 spatial streams
2166          */
2167         rx_status->nss =
2168             le32_get_bits(desc->rx_vec[0],
2169                       RX_NO_DATA_RX_VEC0_VHT_NSTS_MSK) + 1;
2170     } else if (format == RATE_MCS_HE_MSK) {
2171         rx_status->nss =
2172             le32_get_bits(desc->rx_vec[0],
2173                       RX_NO_DATA_RX_VEC0_HE_NSTS_MSK) + 1;
2174     } else {
2175         int rate = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
2176                                    rx_status->band);
2177
2178         if (WARN(rate < 0 || rate > 0xFF,
2179              "Invalid rate flags 0x%x, band %d,\n",
2180              rate_n_flags, rx_status->band)) {
2181             kfree_skb(skb);
2182             goto out;
2183         }
2184         rx_status->rate_idx = rate;
2185     }
2186
2187     ieee80211_rx_napi(mvm->hw, sta, skb, napi);
2188 out:
2189     rcu_read_unlock();
2190 }
2191
2192 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
2193                   struct iwl_rx_cmd_buffer *rxb, int queue)
2194 {
2195     struct iwl_rx_packet *pkt = rxb_addr(rxb);
2196     struct iwl_frame_release *release = (void *)pkt->data;
2197
2198     if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release)))
2199         return;
2200
2201     iwl_mvm_release_frames_from_notif(mvm, napi, release->baid,
2202                       le16_to_cpu(release->nssn),
2203                       queue, 0);
2204 }
2205
2206 void iwl_mvm_rx_bar_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
2207                   struct iwl_rx_cmd_buffer *rxb, int queue)
2208 {
2209     struct iwl_rx_packet *pkt = rxb_addr(rxb);
2210     struct iwl_bar_frame_release *release = (void *)pkt->data;
2211     unsigned int baid = le32_get_bits(release->ba_info,
2212                       IWL_BAR_FRAME_RELEASE_BAID_MASK);
2213     unsigned int nssn = le32_get_bits(release->ba_info,
2214                       IWL_BAR_FRAME_RELEASE_NSSN_MASK);
2215     unsigned int sta_id = le32_get_bits(release->sta_tid,
2216                         IWL_BAR_FRAME_RELEASE_STA_MASK);
2217     unsigned int tid = le32_get_bits(release->sta_tid,
2218                      IWL_BAR_FRAME_RELEASE_TID_MASK);
2219     struct iwl_mvm_baid_data *baid_data;
2220
2221     if (unlikely(iwl_rx_packet_payload_len(pkt) < sizeof(*release)))
2222         return;
2223
2224     if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID ||
2225              baid >= ARRAY_SIZE(mvm->baid_map)))
2226         return;
2227
2228     rcu_read_lock();
2229     baid_data = rcu_dereference(mvm->baid_map[baid]);
2230     if (!baid_data) {
2231         IWL_DEBUG_RX(mvm,
2232                  "Got valid BAID %d but not allocated, invalid BAR release!\n",
2233                   baid);
2234         goto out;
2235     }
2236
2237     if (WARN(tid != baid_data->tid || sta_id != baid_data->sta_id,
2238          "baid 0x%x is mapped to sta:%d tid:%d, but BAR release received for sta:%d tid:%d\n",
2239          baid, baid_data->sta_id, baid_data->tid, sta_id,
2240          tid))
2241         goto out;
2242
2243     iwl_mvm_release_frames_from_notif(mvm, napi, baid, nssn, queue, 0);
2244 out:
2245     rcu_read_unlock();
2246 }