/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include "iwl-trans.h"
#include "mvm.h"
#include "fw-api.h"
#include "fw-dbg.h"

void iwl_mvm_rx_phy_cmd_mq(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
        mvm->ampdu_ref++;

#ifdef CONFIG_IWLWIFI_DEBUGFS
        if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
                spin_lock(&mvm->drv_stats_lock);
                mvm->drv_rx_stats.ampdu_count++;
                spin_unlock(&mvm->drv_stats_lock);
        }
#endif
}

static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
                                   int queue, struct ieee80211_sta *sta)
{
        struct iwl_mvm_sta *mvmsta;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
        struct iwl_mvm_key_pn *ptk_pn;
        u8 tid, keyidx;
        u8 pn[IEEE80211_CCMP_PN_LEN];
        u8 *extiv;

        /* do PN checking */

        /* multicast and non-data only arrives on default queue */
        if (!ieee80211_is_data(hdr->frame_control) ||
            is_multicast_ether_addr(hdr->addr1))
                return 0;

        /* do not check PN for open AP */
        if (!(stats->flag & RX_FLAG_DECRYPTED))
                return 0;

        /*
         * avoid checking for default queue - we don't want to replicate
         * all the logic that's necessary for checking the PN on fragmented
         * frames, leave that to mac80211
         */
        if (queue == 0)
                return 0;

        /* if we are here - this for sure is either CCMP or GCMP */
        if (IS_ERR_OR_NULL(sta)) {
                IWL_ERR(mvm,
                        "expected hw-decrypted unicast frame for station\n");
                return -1;
        }

        mvmsta = iwl_mvm_sta_from_mac80211(sta);

        extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
        keyidx = extiv[3] >> 6;

        ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
        if (!ptk_pn)
                return -1;

        if (ieee80211_is_data_qos(hdr->frame_control))
                tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
        else
                tid = 0;

        /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
        if (tid >= IWL_MAX_TID_COUNT)
                return -1;

        /* load pn */
        pn[0] = extiv[7];
        pn[1] = extiv[6];
        pn[2] = extiv[5];
        pn[3] = extiv[4];
        pn[4] = extiv[1];
        pn[5] = extiv[0];

        if (memcmp(pn, ptk_pn->q[queue].pn[tid],
                   IEEE80211_CCMP_PN_LEN) <= 0)
                return -1;

        memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
        stats->flag |= RX_FLAG_PN_VALIDATED;

        return 0;
}

/* iwl_mvm_create_skb Adds the rxb to a new skb */
static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr,
                               u16 len, u8 crypt_len,
                               struct iwl_rx_cmd_buffer *rxb)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
        unsigned int headlen, fraglen, pad_len = 0;
        unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);

        if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD)
                pad_len = 2;
        len -= pad_len;

        /* If frame is small enough to fit in skb->head, pull it completely.
         * If not, only pull ieee80211_hdr (including crypto if present, and
         * an additional 8 bytes for SNAP/ethertype, see below) so that
         * splice() or TCP coalesce are more efficient.
         *
         * Since, in addition, ieee80211_data_to_8023() always pull in at
         * least 8 bytes (possibly more for mesh) we can do the same here
         * to save the cost of doing it later. That still doesn't pull in
         * the actual IP header since the typical case has a SNAP header.
         * If the latter changes (there are efforts in the standards group
         * to do so) we should revisit this and ieee80211_data_to_8023().
         */
        headlen = (len <= skb_tailroom(skb)) ? len :
                                               hdrlen + crypt_len + 8;

        /* The firmware may align the packet to DWORD.
         * The padding is inserted after the IV.
         * After copying the header + IV skip the padding if
         * present before copying packet data.
         */
        hdrlen += crypt_len;
        memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
        memcpy(skb_put(skb, headlen - hdrlen), (u8 *)hdr + hdrlen + pad_len,
               headlen - hdrlen);

        fraglen = len - headlen;

        if (fraglen) {
                int offset = (void *)hdr + headlen + pad_len -
                             rxb_addr(rxb) + rxb_offset(rxb);

                skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
                                fraglen, rxb->truesize);
        }
}

/* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
                                            struct napi_struct *napi,
                                            struct sk_buff *skb, int queue,
                                            struct ieee80211_sta *sta)
{
        if (iwl_mvm_check_pn(mvm, skb, queue, sta))
                kfree_skb(skb);
        else
                ieee80211_rx_napi(mvm->hw, skb, napi);
}

static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
                                        struct iwl_rx_mpdu_desc *desc,
                                        struct ieee80211_rx_status *rx_status)
{
        int energy_a, energy_b, max_energy;

        energy_a = desc->energy_a;
        energy_a = energy_a ? -energy_a : S8_MIN;
        energy_b = desc->energy_b;
        energy_b = energy_b ? -energy_b : S8_MIN;
        max_energy = max(energy_a, energy_b);

        IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
                        energy_a, energy_b, max_energy);

        rx_status->signal = max_energy;
        rx_status->chains = 0; /* TODO: phy info */
        rx_status->chain_signal[0] = energy_a;
        rx_status->chain_signal[1] = energy_b;
        rx_status->chain_signal[2] = S8_MIN;
}

static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
                             struct ieee80211_rx_status *stats,
                             struct iwl_rx_mpdu_desc *desc, int queue,
                             u8 *crypt_len)
{
        u16 status = le16_to_cpu(desc->status);

        if (!ieee80211_has_protected(hdr->frame_control) ||
            (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
            IWL_RX_MPDU_STATUS_SEC_NONE)
                return 0;

        /* TODO: handle packets encrypted with unknown alg */

        switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
        case IWL_RX_MPDU_STATUS_SEC_CCM:
        case IWL_RX_MPDU_STATUS_SEC_GCM:
                BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
                /* alg is CCM: check MIC only */
                if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
                        return -1;

                stats->flag |= RX_FLAG_DECRYPTED;
                *crypt_len = IEEE80211_CCMP_HDR_LEN;
                return 0;
        case IWL_RX_MPDU_STATUS_SEC_TKIP:
                /* Don't drop the frame and decrypt it in SW */
                if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
                        return 0;

                *crypt_len = IEEE80211_TKIP_IV_LEN;
                /* fall through if TTAK OK */
        case IWL_RX_MPDU_STATUS_SEC_WEP:
                if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
                        return -1;

                stats->flag |= RX_FLAG_DECRYPTED;
                if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
                                IWL_RX_MPDU_STATUS_SEC_WEP)
                        *crypt_len = IEEE80211_WEP_IV_LEN;
                return 0;
        case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
                if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
                        return -1;
                stats->flag |= RX_FLAG_DECRYPTED;
                return 0;
        default:
                IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
        }

        return 0;
}

static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
                            struct sk_buff *skb,
                            struct iwl_rx_mpdu_desc *desc)
{
        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);

        if (mvmvif->features & NETIF_F_RXCSUM &&
            desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_IP_HDR_CSUM_OK) &&
            desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_TCP_UDP_CSUM_OK))
                skb->ip_summed = CHECKSUM_UNNECESSARY;
}

/*
 * returns true if a packet outside BA session is a duplicate and
 * should be dropped
 */
static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue,
                                  struct ieee80211_rx_status *rx_status,
                                  struct ieee80211_hdr *hdr,
                                  struct iwl_rx_mpdu_desc *desc)
{
        struct iwl_mvm_sta *mvm_sta;
        struct iwl_mvm_rxq_dup_data *dup_data;
        u8 baid, tid, sub_frame_idx;

        if (WARN_ON(IS_ERR_OR_NULL(sta)))
                return false;

        baid = (le32_to_cpu(desc->reorder_data) &
                IWL_RX_MPDU_REORDER_BAID_MASK) >>
                IWL_RX_MPDU_REORDER_BAID_SHIFT;

        if (baid != IWL_RX_REORDER_DATA_INVALID_BAID)
                return false;

        mvm_sta = iwl_mvm_sta_from_mac80211(sta);
        dup_data = &mvm_sta->dup_data[queue];

        /*
         * Drop duplicate 802.11 retransmissions
         * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
         */
        if (ieee80211_is_ctl(hdr->frame_control) ||
            ieee80211_is_qos_nullfunc(hdr->frame_control) ||
            is_multicast_ether_addr(hdr->addr1)) {
                rx_status->flag |= RX_FLAG_DUP_VALIDATED;
                return false;
        }

        if (ieee80211_is_data_qos(hdr->frame_control))
                /* frame has qos control */
                tid = *ieee80211_get_qos_ctl(hdr) &
                        IEEE80211_QOS_CTL_TID_MASK;
        else
                tid = IWL_MAX_TID_COUNT;

        /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
        sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;

        if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
                     dup_data->last_seq[tid] == hdr->seq_ctrl &&
                     dup_data->last_sub_frame[tid] >= sub_frame_idx))
                return true;

        dup_data->last_seq[tid] = hdr->seq_ctrl;
        dup_data->last_sub_frame[tid] = sub_frame_idx;

        rx_status->flag |= RX_FLAG_DUP_VALIDATED;

        return false;
}

int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
                            const u8 *data, u32 count)
{
        struct iwl_rxq_sync_cmd *cmd;
        u32 data_size = sizeof(*cmd) + count;
        int ret;

        /* should be DWORD aligned */
        if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
                return -EINVAL;

        cmd = kzalloc(data_size, GFP_KERNEL);
        if (!cmd)
                return -ENOMEM;

        cmd->rxq_mask = cpu_to_le32(rxq_mask);
        cmd->count =  cpu_to_le32(count);
        cmd->flags = 0;
        memcpy(cmd->payload, data, count);

        ret = iwl_mvm_send_cmd_pdu(mvm,
                                   WIDE_ID(DATA_PATH_GROUP,
                                           TRIGGER_RX_QUEUES_NOTIF_CMD),
                                   0, data_size, cmd);

        kfree(cmd);
        return ret;
}

void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
                            int queue)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_rxq_sync_notification *notif;
        struct iwl_mvm_internal_rxq_notif *internal_notif;

        notif = (void *)pkt->data;
        internal_notif = (void *)notif->payload;

        switch (internal_notif->type) {
        case IWL_MVM_RXQ_NOTIF_DEL_BA:
                /* TODO */
                break;
        default:
                WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
        }
}

void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
                        struct iwl_rx_cmd_buffer *rxb, int queue)
{
        struct ieee80211_rx_status *rx_status;
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
        struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc));
        u32 len = le16_to_cpu(desc->mpdu_len);
        u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
        struct ieee80211_sta *sta = NULL;
        struct sk_buff *skb;
        u8 crypt_len = 0;

        /* Dont use dev_alloc_skb(), we'll have enough headroom once
         * ieee80211_hdr pulled.
         */
        skb = alloc_skb(128, GFP_ATOMIC);
        if (!skb) {
                IWL_ERR(mvm, "alloc_skb failed\n");
                return;
        }

        rx_status = IEEE80211_SKB_RXCB(skb);

        if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) {
                kfree_skb(skb);
                return;
        }

        /*
         * Keep packets with CRC errors (and with overrun) for monitor mode
         * (otherwise the firmware discards them) but mark them as bad.
         */
        if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
            !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
                IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
                             le16_to_cpu(desc->status));
                rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
        }

        rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
        rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
        rx_status->band = desc->channel > 14 ? IEEE80211_BAND_5GHZ :
                                               IEEE80211_BAND_2GHZ;
        rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
                                                         rx_status->band);
        iwl_mvm_get_signal_strength(mvm, desc, rx_status);
        /* TSF as indicated by the firmware is at INA time */
        rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;

        rcu_read_lock();

        if (le16_to_cpu(desc->status) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND) {
                u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;

                if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
                        sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
                        if (IS_ERR(sta))
                                sta = NULL;
                }
        } else if (!is_multicast_ether_addr(hdr->addr2)) {
                /*
                 * This is fine since we prevent two stations with the same
                 * address from being added.
                 */
                sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
        }

        if (sta) {
                struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);

                /*
                 * We have tx blocked stations (with CS bit). If we heard
                 * frames from a blocked station on a new channel we can
                 * TX to it again.
                 */
                if (unlikely(mvm->csa_tx_block_bcn_timeout))
                        iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);

                rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);

                if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
                    ieee80211_is_beacon(hdr->frame_control)) {
                        struct iwl_fw_dbg_trigger_tlv *trig;
                        struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
                        bool trig_check;
                        s32 rssi;

                        trig = iwl_fw_dbg_get_trigger(mvm->fw,
                                                      FW_DBG_TRIGGER_RSSI);
                        rssi_trig = (void *)trig->data;
                        rssi = le32_to_cpu(rssi_trig->rssi);

                        trig_check =
                                iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
                                                              trig);
                        if (trig_check && rx_status->signal < rssi)
                                iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
                }

                /* TODO: multi queue TCM */

                if (ieee80211_is_data(hdr->frame_control))
                        iwl_mvm_rx_csum(sta, skb, desc);

                if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) {
                        kfree_skb(skb);
                        rcu_read_unlock();
                        return;
                }

                /*
                 * Our hardware de-aggregates AMSDUs but copies the mac header
                 * as it to the de-aggregated MPDUs. We need to turn off the
                 * AMSDU bit in the QoS control ourselves.
                 */
                if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
                    !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
                        u8 *qc = ieee80211_get_qos_ctl(hdr);

                        *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
                }
        }

        /*
         * TODO: PHY info.
         * Verify we don't have the information in the MPDU descriptor and
         * that it is not needed.
         * Make sure for monitor mode that we are on default queue, update
         * ampdu_ref and the rest of phy info then
         */

        /* Set up the HT phy flags */
        switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
        case RATE_MCS_CHAN_WIDTH_20:
                break;
        case RATE_MCS_CHAN_WIDTH_40:
                rx_status->flag |= RX_FLAG_40MHZ;
                break;
        case RATE_MCS_CHAN_WIDTH_80:
                rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
                break;
        case RATE_MCS_CHAN_WIDTH_160:
                rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
                break;
        }
        if (rate_n_flags & RATE_MCS_SGI_MSK)
                rx_status->flag |= RX_FLAG_SHORT_GI;
        if (rate_n_flags & RATE_HT_MCS_GF_MSK)
                rx_status->flag |= RX_FLAG_HT_GF;
        if (rate_n_flags & RATE_MCS_LDPC_MSK)
                rx_status->flag |= RX_FLAG_LDPC;
        if (rate_n_flags & RATE_MCS_HT_MSK) {
                u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
                                RATE_MCS_STBC_POS;
                rx_status->flag |= RX_FLAG_HT;
                rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
                rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
        } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
                u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
                                RATE_MCS_STBC_POS;
                rx_status->vht_nss =
                        ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
                                                RATE_VHT_MCS_NSS_POS) + 1;
                rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
                rx_status->flag |= RX_FLAG_VHT;
                rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
                if (rate_n_flags & RATE_MCS_BF_MSK)
                        rx_status->vht_flag |= RX_VHT_FLAG_BF;
        } else {
                rx_status->rate_idx =
                        iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
                                                            rx_status->band);
        }

        /* TODO: PHY info - update ampdu queue statistics (for debugfs) */
        /* TODO: PHY info - gscan */

        iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb);
        iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
        rcu_read_unlock();
}

void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm,
                              struct iwl_rx_cmd_buffer *rxb, int queue)
{
        /* TODO */
}