/******************************************************************************
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
 * Copyright(c) 2018        Intel Corporation
 * 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 "src/iwlwifi/iwl-eeprom-parse.h"
#include "src/iwlwifi/iwl-trans.h"
#include "src/iwlwifi/mvm/mvm.h"
#include "src/iwlwifi/mvm/sta.h"
#include "src/iwlwifi/platform/ieee80211.h"
#include "src/iwlwifi/platform/kernel.h"

#if 0  // NEEDS_PORTING
static void iwl_mvm_bar_check_trigger(struct iwl_mvm* mvm, const uint8_t* addr, uint16_t tid,
                                      uint16_t ssn) {
    struct iwl_fw_dbg_trigger_tlv* trig;
    struct iwl_fw_dbg_trigger_ba* ba_trig;

    trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
    if (!trig) { return; }

    ba_trig = (void*)trig->data;

    if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) { return; }

    iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "BAR sent to %pM, tid %d, ssn %d", addr, tid, ssn);
}

#define OPT_HDR(type, skb, off) (type*)(skb_network_header(skb) + (off))

static uint16_t iwl_mvm_tx_csum(struct iwl_mvm* mvm, struct sk_buff* skb, struct ieee80211_hdr* hdr,
                                struct ieee80211_tx_info* info, uint16_t offload_assist) {
#if IS_ENABLED(CONFIG_INET)
    uint16_t mh_len = ieee80211_get_header_len(hdr->frame_control);
    uint8_t protocol = 0;

    /*
     * Do not compute checksum if already computed or if transport will
     * compute it
     */
    if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) { goto out; }

    /* We do not expect to be requested to csum stuff we do not support */
    if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
                      (skb->protocol != htons(ETH_P_IP) && skb->protocol != htons(ETH_P_IPV6)),
                  "No support for requested checksum\n")) {
        skb_checksum_help(skb);
        goto out;
    }

    if (skb->protocol == htons(ETH_P_IP)) {
        protocol = ip_hdr(skb)->protocol;
    } else {
#if IS_ENABLED(CONFIG_IPV6)
        struct ipv6hdr* ipv6h = (struct ipv6hdr*)skb_network_header(skb);
        unsigned int off = sizeof(*ipv6h);

        protocol = ipv6h->nexthdr;
        while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
            struct ipv6_opt_hdr* hp;

            /* only supported extension headers */
            if (protocol != NEXTHDR_ROUTING && protocol != NEXTHDR_HOP &&
                protocol != NEXTHDR_DEST) {
                skb_checksum_help(skb);
                goto out;
            }

            hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
            protocol = hp->nexthdr;
            off += ipv6_optlen(hp);
        }
        /* if we get here - protocol now should be TCP/UDP */
#endif
    }

    if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
        WARN_ON_ONCE(1);
        skb_checksum_help(skb);
        goto out;
    }

    /* enable L4 csum */
    offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);

    /*
     * Set offset to IP header (snap).
     * We don't support tunneling so no need to take care of inner header.
     * Size is in words.
     */
    offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);

    /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
    if (skb->protocol == htons(ETH_P_IP) && (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
        ip_hdr(skb)->check = 0;
        offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
    }

    /* reset UDP/TCP header csum */
    if (protocol == IPPROTO_TCP) {
        tcp_hdr(skb)->check = 0;
    } else {
        udp_hdr(skb)->check = 0;
    }

    /*
     * mac header len should include IV, size is in words unless
     * the IV is added by the firmware like in WEP.
     * In new Tx API, the IV is always added by the firmware.
     */
    if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
        info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
        info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) {
        mh_len += info->control.hw_key->iv_len;
    }
    mh_len /= 2;
    offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;

out:
#endif
    return offload_assist;
}
#endif  // NEEDS_PORTING

/*
 * Sets most of the Tx cmd's fields
 */
void iwl_mvm_set_tx_cmd(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
                        struct iwl_tx_cmd* tx_cmd, uint8_t sta_id) {
  uint32_t tx_flags = le32_to_cpu(tx_cmd->tx_flags);
  tx_flags |= TX_CMD_FLG_SEQ_CTL;
  tx_flags |= TX_CMD_FLG_BT_DIS;
  tx_flags |= TX_CMD_FLG_ACK;
  tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;

  // TODO(51120): below code needs rewrite to support QoS.
#if 0   // NEEDS_PORTING
    struct ieee80211_hdr* hdr = (void*)skb->data;
    __le16 fc = hdr->frame_control;
    uint32_t tx_flags = le32_to_cpu(tx_cmd->tx_flags);
    uint32_t len = skb->len + FCS_LEN;
    uint16_t offload_assist = 0;
    uint8_t ac;

    if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
        tx_flags |= TX_CMD_FLG_ACK;
    } else {
        tx_flags &= ~TX_CMD_FLG_ACK;
    }

    if (ieee80211_is_probe_resp(fc)) { tx_flags |= TX_CMD_FLG_TSF; }

    if (ieee80211_has_morefrags(fc)) { tx_flags |= TX_CMD_FLG_MORE_FRAG; }

    if (ieee80211_is_data_qos(fc)) {
        uint8_t* qc = ieee80211_get_qos_ctl(hdr);
        tx_cmd->tid_tspec = qc[0] & 0xf;
        tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
        if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) { offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); }
    } else if (ieee80211_is_back_req(fc)) {
        struct ieee80211_bar* bar = (void*)skb->data;
        uint16_t control = le16_to_cpu(bar->control);
        uint16_t ssn = le16_to_cpu(bar->start_seq_num);

        tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
        tx_cmd->tid_tspec =
            (control & IEEE80211_BAR_CTRL_TID_INFO_MASK) >> IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
        WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
        iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, ssn);
    } else {
        if (ieee80211_is_data(fc)) {
            tx_cmd->tid_tspec = IWL_TID_NON_QOS;
        } else {
            tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
        }

        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
            tx_flags |= TX_CMD_FLG_SEQ_CTL;
        } else {
            tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
        }
    }

    /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
    if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) {
        ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
    } else {
        ac = tid_to_mac80211_ac[0];
    }

    tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << TX_CMD_FLG_BT_PRIO_POS;

    if (ieee80211_is_mgmt(fc)) {
        if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) {
            tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
        } else if (ieee80211_is_action(fc)) {
            tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
        } else {
            tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
        }

        /* The spec allows Action frames in A-MPDU, we don't support
         * it
         */
        WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
    } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
        tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
    } else {
        tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
    }

    if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
        !is_multicast_ether_addr(ieee80211_get_DA(hdr))) {
        tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
    }

    if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
        ieee80211_action_contains_tpc(skb)) {
        tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
    }
#endif  // NEEDS_PORTING

  tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);

  tx_cmd->tx_flags = cpu_to_le32(tx_flags);
  /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
  tx_cmd->len = cpu_to_le16(pkt->header_size + pkt->headroom_used_size + pkt->body_size);
  tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
  tx_cmd->sta_id = sta_id;

#if 0   // NEEDS_PORTING
    /* padding is inserted later in transport */
    if (ieee80211_get_header_len(fc) % 4 && !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
        offload_assist |= BIT(TX_CMD_OFFLD_PAD);
    }

    tx_cmd->offload_assist |= cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, offload_assist));
#endif  // NEEDS_PORTING
}

#if 0  // NEEDS_PORTING
static uint32_t iwl_mvm_get_tx_ant(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
                                   struct ieee80211_sta* sta, __le16 fc) {
    if (info->band == NL80211_BAND_2GHZ && !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) {
        return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
    }

    if (sta && ieee80211_is_data(fc)) {
        struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);

        return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
    }

    return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
}

static uint32_t iwl_mvm_get_tx_rate(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
                                    struct ieee80211_sta* sta) {
    int rate_idx;
    uint8_t rate_plcp;
    uint32_t rate_flags = 0;

    /* HT rate doesn't make sense for a non data frame */
    WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
              "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
              info->control.rates[0].flags, info->control.rates[0].idx);

    rate_idx = info->control.rates[0].idx;
    /* if the rate isn't a well known legacy rate, take the lowest one */
    if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) {
        rate_idx = rate_lowest_index(&mvm->nvm_data->bands[info->band], sta);
    }

    /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
    if (info->band == NL80211_BAND_5GHZ) { rate_idx += IWL_FIRST_OFDM_RATE; }
#ifdef CPTCFG_IWLWIFI_FORCE_OFDM_RATE
    /* Force OFDM on each TX packet */
    rate_idx = IWL_FIRST_OFDM_RATE;
#endif

    /* For 2.4 GHZ band, check that there is no need to remap */
    BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);

    /* Get PLCP rate for tx_cmd->rate_n_flags */
    rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);

    /* Set CCK flag as needed */
    if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) {
        rate_flags |= RATE_MCS_CCK_MSK;
    }

    return (uint32_t)rate_plcp | rate_flags;
}

static uint32_t iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
                                            struct ieee80211_sta* sta, __le16 fc) {
    return iwl_mvm_get_tx_rate(mvm, info, sta) | iwl_mvm_get_tx_ant(mvm, info, sta, fc);
}
#endif  // NEEDS_PORTING

/*
 * Sets the fields in the Tx cmd that are rate related
 */
void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm* mvm, struct iwl_tx_cmd* tx_cmd) {
  /* Set retry limit on RTS packets */
  tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;

  tx_cmd->rate_n_flags = iwl_mvm_mac80211_idx_to_hwrate(IWL_FIRST_OFDM_RATE) |
                         (BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS);

  /* Set retry limit on DATA packets and Probe Responses*/
  tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
  // TODO(51120): below code needs rewrite to support QoS.
#if 0  // NEEDS_PORTING
    /* Set retry limit on DATA packets and Probe Responses*/
    if (ieee80211_is_probe_resp(fc)) {
        tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
        tx_cmd->rts_retry_limit = min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
    } else if (ieee80211_is_back_req(fc)) {
        tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
    } else {
        tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
    }

    /*
     * for data packets, rate info comes from the table inside the fw. This
     * table is controlled by LINK_QUALITY commands
     */

#ifndef CPTCFG_IWLWIFI_FORCE_OFDM_RATE
    if (ieee80211_is_data(fc) && sta) {
        struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);

        if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
            tx_cmd->initial_rate_index = 0;
            tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
            return;
        }
    } else if (ieee80211_is_back_req(fc)) {
        tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
    }
#else
    if (ieee80211_is_back_req(fc)) {
        tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
    }
#endif

    /* Set the rate in the TX cmd */
    tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
#endif  // NEEDS_PORTING
}

static void iwl_mvm_set_tx_cmd_pn(struct iwl_mvm_sta_key_conf* keyconf, uint8_t* ccmp_hdr) {
  uint64_t pn = atomic64_inc_return(&keyconf->tx_pn);
  ccmp_hdr[0] = pn;
  ccmp_hdr[2] = 0;
  ccmp_hdr[3] = 0x20 | (keyconf->keyidx << 6);
  ccmp_hdr[1] = pn >> 8;
  ccmp_hdr[4] = pn >> 16;
  ccmp_hdr[5] = pn >> 24;
  ccmp_hdr[6] = pn >> 32;
  ccmp_hdr[7] = pn >> 40;
}

/*
 * Sets the fields in the Tx cmd that are crypto related
 */
static zx_status_t iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm* mvm, struct iwl_mvm_sta_key_conf* key,
                                             struct iwl_tx_cmd* tx_cmd,
                                             struct ieee80211_mac_packet* pkt) {
  switch (key->cipher_type) {
    case CIPHER_SUITE_TYPE_CCMP_128:
      // Insert the CCMP header into the headroom space.
      if (sizeof(pkt->headroom) - pkt->headroom_used_size < 8) {
        return ZX_ERR_NO_SPACE;
      }
      iwl_mvm_set_tx_cmd_ccmp(key, tx_cmd);
      iwl_mvm_set_tx_cmd_pn(key, pkt->headroom + pkt->headroom_used_size);
      tx_cmd->len += 8;
      pkt->headroom_used_size += 8;
      break;
    default:
        tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
  }
  return ZX_OK;
}

/*
 * Allocates and sets the Tx cmd the driver data pointers in the skb
 *
 * An 'struct iwl_device_cmd' instance is passed in 'dev_cmd' as input. It also stores the output of
 * this function.
 *
 * Note that the 'struct iwl_device_cmd' includes two parts: the header and the payload. The header
 * size is fixed, while the *actual* payload is variable, which depends on the command type and in
 * this case it is sizeof(stuct iwl_tx_cmd). Also, worth to note that the 'struct iwl_device_cmd'
 * already contains the maximum payload size.
 *
 */
static zx_status_t iwl_mvm_set_tx_params(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
                                         const struct iwl_mvm_sta* mvmsta,
                                         struct iwl_device_cmd* dev_cmd) {
  zx_status_t ret = ZX_OK;
  uint8_t sta_id = mvmsta->sta_id;
  struct iwl_tx_cmd* tx_cmd;

  /* Make sure we zero enough of dev_cmd */
  BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
  BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));

  memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
  dev_cmd->hdr.cmd = TX_CMD;

#if 0   // NEEDS_PORTING
    if (iwl_mvm_has_new_tx_api(mvm)) {
        uint16_t offload_assist = 0;
        uint32_t rate_n_flags = 0;
        uint16_t flags = 0;
        struct iwl_mvm_sta* mvmsta = sta ? iwl_mvm_sta_from_mac80211(sta) : NULL;

        if (ieee80211_is_data_qos(hdr->frame_control)) {
            uint8_t* qc = ieee80211_get_qos_ctl(hdr);

            if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) {
                offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
            }
        }

        offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, offload_assist);

        /* padding is inserted later in transport */
        if (ieee80211_get_header_len(hdr->frame_control) % 4 &&
            !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
            offload_assist |= BIT(TX_CMD_OFFLD_PAD);
        }

        if (!info->control.hw_key) { flags |= IWL_TX_FLAGS_ENCRYPT_DIS; }

        /*
         * For data packets rate info comes from the fw. Only
         * set rate/antenna during connection establishment or in case
         * no station is given.
         */
        if (!sta || !ieee80211_is_data(hdr->frame_control) ||
            mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
            flags |= IWL_TX_FLAGS_CMD_RATE;
            rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, hdr->frame_control);
        }

        if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
            struct iwl_tx_cmd_gen3* cmd = (void*)dev_cmd->payload;

            cmd->offload_assist |= cpu_to_le32(offload_assist);

            /* Total # bytes to be transmitted */
            cmd->len = cpu_to_le16((uint16_t)skb->len);

            /* Copy MAC header from skb into command buffer */
            memcpy(cmd->hdr, hdr, hdrlen);

            cmd->flags = cpu_to_le16(flags);
            cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
        } else {
            struct iwl_tx_cmd_gen2* cmd = (void*)dev_cmd->payload;

            cmd->offload_assist |= cpu_to_le16(offload_assist);

            /* Total # bytes to be transmitted */
            cmd->len = cpu_to_le16((uint16_t)skb->len);

            /* Copy MAC header from skb into command buffer */
            memcpy(cmd->hdr, hdr, hdrlen);

            cmd->flags = cpu_to_le32(flags);
            cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
        }
        goto out;
    }
#endif  // NEEDS_PORTING

  tx_cmd = (struct iwl_tx_cmd*)dev_cmd->payload;
  iwl_mvm_set_tx_cmd(mvm, pkt, tx_cmd, sta_id);

  if (mvmsta->key_conf) {
    if ((ret = iwl_mvm_set_tx_cmd_crypto(mvm, mvmsta->key_conf, tx_cmd, pkt)) != ZX_OK) {
      return ret;
    }
  }

  iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd);

  /* Copy MAC header from pkt into command buffer */
  memcpy(tx_cmd->hdr, pkt->common_header, pkt->header_size);

  return ZX_OK;
}

#if 0  // NEEDS_PORTING
static void iwl_mvm_skb_prepare_status(struct sk_buff* skb, struct iwl_device_cmd* cmd) {
    struct ieee80211_tx_info* skb_info = IEEE80211_SKB_CB(skb);

    memset(&skb_info->status, 0, sizeof(skb_info->status));
    memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));

    skb_info->driver_data[1] = cmd;
}

static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
                                      struct ieee80211_hdr* hdr) {
    struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
    __le16 fc = hdr->frame_control;

    switch (info->control.vif->type) {
    case NL80211_IFTYPE_AP:
    case NL80211_IFTYPE_ADHOC:
        /*
         * Non-bufferable frames use the broadcast station, thus they
         * use the probe queue.
         * Also take care of the case where we send a deauth to a
         * station that we don't have, or similarly an association
         * response (with non-success status) for a station we can't
         * accept.
         * Also, disassociate frames might happen, particular with
         * reason 7 ("Class 3 frame received from nonassociated STA").
         */
        if (ieee80211_is_mgmt(fc) && (!ieee80211_is_bufferable_mmpdu(fc) ||
                                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) {
            return mvm->probe_queue;
        }

        if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
            is_multicast_ether_addr(hdr->addr1)) {
            return mvmvif->cab_queue;
        }

        WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, "fc=0x%02x", le16_to_cpu(fc));
        return mvm->probe_queue;
    case NL80211_IFTYPE_P2P_DEVICE:
        if (ieee80211_is_mgmt(fc)) { return mvm->p2p_dev_queue; }

        WARN_ON_ONCE(1);
        return mvm->p2p_dev_queue;
    default:
        WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
        return -1;
    }
}

static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm* mvm, struct sk_buff* skb) {
    struct ieee80211_tx_info* info = IEEE80211_SKB_CB(skb);
    struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
    struct ieee80211_mgmt* mgmt = (struct ieee80211_mgmt*)skb->data;
    int base_len = (uint8_t*)mgmt->u.probe_resp.variable - (uint8_t*)mgmt;
    struct iwl_probe_resp_data* resp_data;
    uint8_t *ie, *pos;
    uint8_t match[] = {
        (WLAN_OUI_WFA >> 16) & 0xff,
        (WLAN_OUI_WFA >> 8) & 0xff,
        WLAN_OUI_WFA & 0xff,
        WLAN_OUI_TYPE_WFA_P2P,
    };

    rcu_read_lock();

    resp_data = rcu_dereference(mvmvif->probe_resp_data);
    if (!resp_data) { goto out; }

    if (!resp_data->notif.noa_active) { goto out; }

    ie = (uint8_t*)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, mgmt->u.probe_resp.variable,
                                          skb->len - base_len, match, 4, 2);
    if (!ie) {
        IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
        goto out;
    }

    if (skb_tailroom(skb) < resp_data->noa_len) {
        if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
            IWL_ERR(mvm, "Failed to reallocate probe resp\n");
            goto out;
        }
    }

    pos = skb_put(skb, resp_data->noa_len);

    *pos++ = WLAN_EID_VENDOR_SPECIFIC;
    /* Set length of IE body (not including ID and length itself) */
    *pos++ = resp_data->noa_len - 2;
    *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
    *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
    *pos++ = WLAN_OUI_WFA & 0xff;
    *pos++ = WLAN_OUI_TYPE_WFA_P2P;

    memcpy(pos, &resp_data->notif.noa_attr,
           resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));

out:
    rcu_read_unlock();
}

int iwl_mvm_tx_skb_non_sta(struct iwl_mvm* mvm, struct sk_buff* skb) {
    struct ieee80211_hdr* hdr = (struct ieee80211_hdr*)skb->data;
    struct ieee80211_tx_info info;
    struct iwl_device_cmd* dev_cmd;
    uint8_t sta_id;
    int hdrlen = ieee80211_get_header_len(hdr->frame_control);
    __le16 fc = hdr->frame_control;
    bool offchannel = IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_TX_OFFCHAN;
    int queue = -1;

    memcpy(&info, skb->cb, sizeof(info));

    if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) { return -1; }

    if (info.control.vif) {
        struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(info.control.vif);

        if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
            info.control.vif->type == NL80211_IFTYPE_AP ||
            info.control.vif->type == NL80211_IFTYPE_ADHOC) {
            if (!ieee80211_is_data(hdr->frame_control)) {
                sta_id = mvmvif->bcast_sta.sta_id;
            } else {
                sta_id = mvmvif->mcast_sta.sta_id;
            }

            queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
        } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
            queue = mvm->snif_queue;
            sta_id = mvm->snif_sta.sta_id;
        } else if (info.control.vif->type == NL80211_IFTYPE_STATION && offchannel) {
            /*
             * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
             * that can be used in 2 different types of vifs, P2P &
             * STATION.
             * P2P uses the offchannel queue.
             * STATION (HS2.0) uses the auxiliary context of the FW,
             * and hence needs to be sent on the aux queue.
             */
            sta_id = mvm->aux_sta.sta_id;
            queue = mvm->aux_queue;
        }
    }

    if (queue < 0) {
        IWL_ERR(mvm, "No queue was found. Dropping TX\n");
        return -1;
    }

    if (unlikely(ieee80211_is_probe_resp(fc))) { iwl_mvm_probe_resp_set_noa(mvm, skb); }

    IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);

    dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
    if (!dev_cmd) { return -1; }

    /* From now on, we cannot access info->control */
    iwl_mvm_skb_prepare_status(skb, dev_cmd);

    if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
        iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
        return -1;
    }

    return 0;
}

unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm* mvm, struct ieee80211_sta* sta,
                                    unsigned int tid) {
    struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
    enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
    uint8_t ac = tid_to_mac80211_ac[tid];
    unsigned int txf;
    int lmac = IWL_LMAC_24G_INDEX;

    if (iwl_mvm_is_cdb_supported(mvm) && band == NL80211_BAND_5GHZ) { lmac = IWL_LMAC_5G_INDEX; }

    /* For HE redirect to trigger based fifos */
    if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) { ac += 4; }

    txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);

    /*
     * Don't send an AMSDU that will be longer than the TXF.
     * Add a security margin of 256 for the TX command + headers.
     * We also want to have the start of the next packet inside the
     * fifo to be able to send bursts.
     */
    return min_t(unsigned int, mvmsta->max_amsdu_len,
                 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
}

#ifdef CONFIG_INET

static int iwl_mvm_tx_tso_segment(struct sk_buff* skb, unsigned int num_subframes,
                                  netdev_features_t netdev_flags, struct sk_buff_head* mpdus_skb) {
    struct sk_buff *tmp, *next;
    struct ieee80211_hdr* hdr = (void*)skb->data;
    char cb[sizeof(skb->cb)];
    uint16_t i = 0;
    unsigned int tcp_payload_len;
    unsigned int mss = skb_shinfo(skb)->gso_size;
    bool ipv4 = (skb->protocol == htons(ETH_P_IP));
    uint16_t ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;

    skb_shinfo(skb)->gso_size = num_subframes * mss;
    memcpy(cb, skb->cb, sizeof(cb));

    next = skb_gso_segment(skb, netdev_flags);
    skb_shinfo(skb)->gso_size = mss;
    if (WARN_ON_ONCE(IS_ERR(next))) {
        return -EINVAL;
    } else if (next) {
        consume_skb(skb);
    }

    while (next) {
        tmp = next;
        next = tmp->next;

        memcpy(tmp->cb, cb, sizeof(tmp->cb));
        /*
         * Compute the length of all the data added for the A-MSDU.
         * This will be used to compute the length to write in the TX
         * command. We have: SNAP + IP + TCP for n -1 subframes and
         * ETH header for n subframes.
         */
        tcp_payload_len =
            skb_tail_pointer(tmp) - skb_transport_header(tmp) - tcp_hdrlen(tmp) + tmp->data_len;

        if (ipv4) { ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); }

        if (tcp_payload_len > mss) {
            skb_shinfo(tmp)->gso_size = mss;
        } else {
            if (ieee80211_is_data_qos(hdr->frame_control)) {
                uint8_t* qc;

                if (ipv4) { ip_send_check(ip_hdr(tmp)); }

                qc = ieee80211_get_qos_ctl((void*)tmp->data);
                *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
            }
            skb_shinfo(tmp)->gso_size = 0;
        }

        tmp->prev = NULL;
        tmp->next = NULL;

        __skb_queue_tail(mpdus_skb, tmp);
        i++;
    }

    return 0;
}

static int iwl_mvm_tx_tso(struct iwl_mvm* mvm, struct sk_buff* skb, struct ieee80211_tx_info* info,
                          struct ieee80211_sta* sta, struct sk_buff_head* mpdus_skb) {
    struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
    struct ieee80211_hdr* hdr = (void*)skb->data;
    unsigned int mss = skb_shinfo(skb)->gso_size;
    unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
    uint16_t snap_ip_tcp, pad;
    unsigned int dbg_max_amsdu_len;
    netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
    uint8_t tid;

    snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + tcp_hdrlen(skb);

    dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);

    if (!mvmsta->max_amsdu_len || !ieee80211_is_data_qos(hdr->frame_control) ||
        (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) {
        return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
    }

    /*
     * Do not build AMSDU for IPv6 with extension headers.
     * ask stack to segment and checkum the generated MPDUs for us.
     */
    if (skb->protocol == htons(ETH_P_IPV6) &&
        ((struct ipv6hdr*)skb_network_header(skb))->nexthdr != IPPROTO_TCP) {
        netdev_flags &= ~NETIF_F_CSUM_MASK;
        return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
    }

    tid = ieee80211_get_tid(hdr);
    if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) { return -EINVAL; }

    /*
     * No need to lock amsdu_in_ampdu_allowed since it can't be modified
     * during an BA session.
     */
    if (info->flags & IEEE80211_TX_CTL_AMPDU && !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
        return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
    }

    if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
        !(mvmsta->amsdu_enabled & BIT(tid))) {
        return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
    }

    max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);

    if (unlikely(dbg_max_amsdu_len)) {
        max_amsdu_len = min_t(unsigned int, max_amsdu_len, dbg_max_amsdu_len);
    }

    /*
     * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
     * supported. This is a spec requirement (IEEE 802.11-2015
     * section 8.7.3 NOTE 3).
     */
    if (info->flags & IEEE80211_TX_CTL_AMPDU && !sta->vht_cap.vht_supported) {
        max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
    }

    /* Sub frame header + SNAP + IP header + TCP header + MSS */
    subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
    pad = (4 - subf_len) & 0x3;

    /*
     * If we have N subframes in the A-MSDU, then the A-MSDU's size is
     * N * subf_len + (N - 1) * pad.
     */
    num_subframes = (max_amsdu_len + pad) / (subf_len + pad);

    if (sta->max_amsdu_subframes && num_subframes > sta->max_amsdu_subframes) {
        num_subframes = sta->max_amsdu_subframes;
    }

    tcp_payload_len =
        skb_tail_pointer(skb) - skb_transport_header(skb) - tcp_hdrlen(skb) + skb->data_len;

    /*
     * Make sure we have enough TBs for the A-MSDU:
     *  2 for each subframe
     *  1 more for each fragment
     *  1 more for the potential data in the header
     */
    if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > mvm->trans->max_skb_frags) {
        num_subframes = 1;
    }

    if (num_subframes > 1) { *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; }

    /* This skb fits in one single A-MSDU */
    if (num_subframes * mss >= tcp_payload_len) {
        __skb_queue_tail(mpdus_skb, skb);
        return 0;
    }

    /*
     * Trick the segmentation function to make it
     * create SKBs that can fit into one A-MSDU.
     */
    return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb);
}
#else /* CONFIG_INET */
static int iwl_mvm_tx_tso(struct iwl_mvm* mvm, struct sk_buff* skb, struct ieee80211_tx_info* info,
                          struct ieee80211_sta* sta, struct sk_buff_head* mpdus_skb) {
    /* Impossible to get TSO with CONFIG_INET */
    WARN_ON(1);

    return -1;
}
#endif

/* Check if there are any timed-out TIDs on a given shared TXQ */
static bool iwl_mvm_txq_should_update(struct iwl_mvm* mvm, int txq_id) {
    unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
    unsigned long now = jiffies;
    int tid;

    if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) { return false; }

    for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
        if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + IWL_MVM_DQA_QUEUE_TIMEOUT,
                        now)) {
            return true;
        }
    }

    return false;
}

static void iwl_mvm_tx_airtime(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, int airtime) {
    int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
    struct iwl_mvm_tcm_mac* mdata;

    if (mac >= NUM_MAC_INDEX_DRIVER) { return; }

    mdata = &mvm->tcm.data[mac];

    if (mvm->tcm.paused) { return; }

    if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) {
        schedule_delayed_work(&mvm->tcm.work, 0);
    }

    mdata->tx.airtime += airtime;
}
#endif  // NEEDS_PORTING

static zx_status_t iwl_mvm_tx_pkt_queued(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, int tid) {
  uint32_t ac = tid_to_mac80211_ac[tid];
  int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
  struct iwl_mvm_tcm_mac* mdata;

  if (mac >= NUM_MAC_INDEX_DRIVER) {
    IWL_ERR(mvm, "invliad mac value %d (> %d)\n", mac, NUM_MAC_INDEX_DRIVER);
    return ZX_ERR_INVALID_ARGS;
  }

  mdata = &mvm->tcm.data[mac];

  mdata->tx.pkts[ac]++;

  return ZX_OK;
}

zx_status_t iwl_mvm_tx_mpdu(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
                            struct iwl_mvm_sta* mvmsta) {
  zx_status_t ret = ZX_OK;
  uint8_t tid = IWL_MAX_TID_COUNT;  // TODO(51120): support QoS
  uint16_t txq_id = mvmsta->tid_data[tid].txq_id;

  struct iwl_device_cmd dev_cmd;
  if ((ret = iwl_mvm_set_tx_params(mvm, pkt, mvmsta, &dev_cmd)) != ZX_OK) {
    return ret;
  }

  mtx_lock(&mvmsta->lock);

  uint16_t seq_number = mvmsta->tid_data[tid].seq_number;
  IWL_DEBUG_TX(mvm, "iwl_mvm_tx_mpdu() TX to [std_id:%d|tid:%d] txq_id:%d - seq:0x%x\n",
               mvmsta->sta_id, tid, txq_id, seq_number >> 4);

  ret = iwl_trans_tx(mvm->trans, pkt, &dev_cmd, txq_id);
  mtx_unlock(&mvmsta->lock);
  if ((ret != ZX_OK)) {
    return ret;
  }

  return iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);

#if 0   // NEEDS_PORTING
    // TODO(fxbug.dev/49224): support power saving.
    /*
     * we handle that entirely ourselves -- for uAPSD the firmware
     * will always send a notification, and for PS-Poll responses
     * we'll notify mac80211 when getting frame status
     */
    info->flags &= ~IEEE80211_TX_STATUS_EOSP;

    spin_lock(&mvmsta->lock);

    /* nullfunc frames should go to the MGMT queue regardless of QOS,
     * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
     * assignment of MGMT TID
     */
    if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
        tid = ieee80211_get_tid(hdr);
        if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) { goto drop_unlock_sta; }

        is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
        if (WARN_ON_ONCE(is_ampdu && mvmsta->tid_data[tid].state != IWL_AGG_ON)) {
            goto drop_unlock_sta;
        }

        seq_number = mvmsta->tid_data[tid].seq_number;
        seq_number &= IEEE80211_SCTL_SEQ;

        if (!iwl_mvm_has_new_tx_api(mvm)) {
            struct iwl_tx_cmd* tx_cmd = (void*)dev_cmd->payload;

            hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
            hdr->seq_ctrl |= cpu_to_le16(seq_number);
            /* update the tx_cmd hdr as it was already copied */
            tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
        }
    } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
        tid = IWL_TID_NON_QOS;
    }

    txq_id = mvmsta->tid_data[tid].txq_id;

    WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);

    if (WARN_ON_ONCE(txq_id == IWL_MVM_INVALID_QUEUE)) {
        iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
        spin_unlock(&mvmsta->lock);
        return 0;
    }

    if (!iwl_mvm_has_new_tx_api(mvm)) {
        /* Keep track of the time of the last frame for this RA/TID */
        mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;

        /*
         * If we have timed-out TIDs - schedule the worker that will
         * reconfig the queues and update them
         *
         * Note that the no lock is taken here in order to not serialize
         * the TX flow. This isn't dangerous because scheduling
         * mvm->add_stream_wk can't ruin the state, and if we DON'T
         * schedule it due to some race condition then next TX we get
         * here we will.
         */
        if (unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED &&
                     iwl_mvm_txq_should_update(mvm, txq_id))) {
            schedule_work(&mvm->add_stream_wk);
        }
    }

    IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, tid, txq_id,
                 IEEE80211_SEQ_TO_SN(seq_number));

    /* From now on, we cannot access info->control */
    iwl_mvm_skb_prepare_status(skb, dev_cmd);

    if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) { goto drop_unlock_sta; }

    if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) {
        mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
    }

    spin_unlock(&mvmsta->lock);

    if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid)) { goto drop; }

    return 0;

drop_unlock_sta:
    iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
    spin_unlock(&mvmsta->lock);
drop:
    return -1;
#endif  // NEEDS_PORTING
}

zx_status_t iwl_mvm_tx_skb(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
                           struct iwl_mvm_sta* mvmsta) {
  if (!mvmsta) {
    IWL_ERR(mvm, "iwl_mvm_tx_skb(): mvmsta is NULL\n");
    return ZX_ERR_INVALID_ARGS;
  }

  if (mvmsta->sta_id == IWL_MVM_INVALID_STA) {
    IWL_ERR(mvm, "iwl_mvm_tx_skb(): mvmsta->sta_id is invalid\n");
    return ZX_ERR_INVALID_ARGS;
  }

  return iwl_mvm_tx_mpdu(mvm, pkt, mvmsta);

#if 0   // NEEDS_PORTING
    // TODO(fxbug.dev/61069): supports TSO (TCP Segment Offload)/
    memcpy(&info, skb->cb, sizeof(info));

    if (!skb_is_gso(skb)) { return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); }

    payload_len =
        skb_tail_pointer(skb) - skb_transport_header(skb) - tcp_hdrlen(skb) + skb->data_len;

    if (payload_len <= skb_shinfo(skb)->gso_size) { return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); }

    __skb_queue_head_init(&mpdus_skbs);

    ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
    if (ret) { return ret; }

    if (WARN_ON(skb_queue_empty(&mpdus_skbs))) { return ret; }

    while (!skb_queue_empty(&mpdus_skbs)) {
        skb = __skb_dequeue(&mpdus_skbs);

        ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
        if (ret) {
            __skb_queue_purge(&mpdus_skbs);
            return ret;
        }
    }

    return 0;
#endif  // NEEDS_PORTING
}

#if 0  // NEEDS_PORTING
static void iwl_mvm_check_ratid_empty(struct iwl_mvm* mvm, struct ieee80211_sta* sta, uint8_t tid) {
    struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
    struct iwl_mvm_tid_data* tid_data = &mvmsta->tid_data[tid];
    struct ieee80211_vif* vif = mvmsta->vif;
    uint16_t normalized_ssn;

    iwl_assert_lock_held(&mvmsta->lock);

    if ((tid_data->state == IWL_AGG_ON || tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
        iwl_mvm_tid_queued(mvm, tid_data) == 0) {
        /*
         * Now that this aggregation or DQA queue is empty tell
         * mac80211 so it knows we no longer have frames buffered for
         * the station on this TID (for the TIM bitmap calculation.)
         */
        ieee80211_sta_set_buffered(sta, tid, false);
    }

    /*
     * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
     * to align the wrap around of ssn so we compare relevant values.
     */
    normalized_ssn = tid_data->ssn;
    if (mvm->trans->cfg->gen2) { normalized_ssn &= 0xff; }

    if (normalized_ssn != tid_data->next_reclaimed) { return; }

    switch (tid_data->state) {
    case IWL_EMPTYING_HW_QUEUE_ADDBA:
        IWL_DEBUG_TX_QUEUES(mvm, "Can continue addBA flow ssn = next_recl = %d\n",
                            tid_data->next_reclaimed);
        tid_data->state = IWL_AGG_STARTING;
        ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
        break;

    case IWL_EMPTYING_HW_QUEUE_DELBA:
        IWL_DEBUG_TX_QUEUES(mvm, "Can continue DELBA flow ssn = next_recl = %d\n",
                            tid_data->next_reclaimed);
        tid_data->state = IWL_AGG_OFF;
        ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
        break;

    default:
        break;
    }
}

#ifdef CPTCFG_IWLWIFI_DEBUG
const char* iwl_mvm_get_tx_fail_reason(uint32_t status) {
#define TX_STATUS_FAIL(x)  \
  case TX_STATUS_FAIL_##x: \
    return #x
#define TX_STATUS_POSTPONE(x)  \
  case TX_STATUS_POSTPONE_##x: \
    return #x

    switch (status & TX_STATUS_MSK) {
    case TX_STATUS_SUCCESS:
        return "SUCCESS";
        TX_STATUS_POSTPONE(DELAY);
        TX_STATUS_POSTPONE(FEW_BYTES);
        TX_STATUS_POSTPONE(BT_PRIO);
        TX_STATUS_POSTPONE(QUIET_PERIOD);
        TX_STATUS_POSTPONE(CALC_TTAK);
        TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
        TX_STATUS_FAIL(SHORT_LIMIT);
        TX_STATUS_FAIL(LONG_LIMIT);
        TX_STATUS_FAIL(UNDERRUN);
        TX_STATUS_FAIL(DRAIN_FLOW);
        TX_STATUS_FAIL(RFKILL_FLUSH);
        TX_STATUS_FAIL(LIFE_EXPIRE);
        TX_STATUS_FAIL(DEST_PS);
        TX_STATUS_FAIL(HOST_ABORTED);
        TX_STATUS_FAIL(BT_RETRY);
        TX_STATUS_FAIL(STA_INVALID);
        TX_STATUS_FAIL(FRAG_DROPPED);
        TX_STATUS_FAIL(TID_DISABLE);
        TX_STATUS_FAIL(FIFO_FLUSHED);
        TX_STATUS_FAIL(SMALL_CF_POLL);
        TX_STATUS_FAIL(FW_DROP);
        TX_STATUS_FAIL(STA_COLOR_MISMATCH);
    }

    return "UNKNOWN";

#undef TX_STATUS_FAIL
#undef TX_STATUS_POSTPONE
}
#endif /* CPTCFG_IWLWIFI_DEBUG */

void iwl_mvm_hwrate_to_tx_rate(uint32_t rate_n_flags, enum nl80211_band band,
                               struct ieee80211_tx_rate* r) {
    if (rate_n_flags & RATE_HT_MCS_GF_MSK) { r->flags |= IEEE80211_TX_RC_GREEN_FIELD; }
    switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
    case RATE_MCS_CHAN_WIDTH_20:
        break;
    case RATE_MCS_CHAN_WIDTH_40:
        r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
        break;
    case RATE_MCS_CHAN_WIDTH_80:
        r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
        break;
    case RATE_MCS_CHAN_WIDTH_160:
        r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
        break;
    }
    if (rate_n_flags & RATE_MCS_SGI_MSK) { r->flags |= IEEE80211_TX_RC_SHORT_GI; }
    if (rate_n_flags & RATE_MCS_HT_MSK) {
        r->flags |= IEEE80211_TX_RC_MCS;
        r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
    } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
        ieee80211_rate_set_vht(r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
                               ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> RATE_VHT_MCS_NSS_POS) + 1);
        r->flags |= IEEE80211_TX_RC_VHT_MCS;
    } else {
        r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, band);
    }
}

/**
 * translate ucode response to mac80211 tx status control values
 */
static void iwl_mvm_hwrate_to_tx_status(uint32_t rate_n_flags, struct ieee80211_tx_info* info) {
    struct ieee80211_tx_rate* r = &info->status.rates[0];

    info->status.antenna = ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
    iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
}

#ifdef CPTCFG_MAC80211_LATENCY_MEASUREMENTS
static void iwl_mvm_tx_lat_add_ts_ack(struct sk_buff* skb) {
    s64 temp = ktime_to_ms(ktime_get());
    s64 ts_1 = ktime_to_ns(skb->tstamp) >> 32;
    s64 diff = temp - ts_1;

#if LINUX_VERSION_IS_LESS(4, 10, 0)
    skb->tstamp.tv64 += diff;
#else
    skb->tstamp += diff;
#endif
}
#endif

static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm* mvm, uint32_t status) {
    struct iwl_fw_dbg_trigger_tlv* trig;
    struct iwl_fw_dbg_trigger_tx_status* status_trig;
    int i;

    trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_TX_STATUS);
    if (!trig) { return; }

    status_trig = (void*)trig->data;

    for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
        /* don't collect on status 0 */
        if (!status_trig->statuses[i].status) { break; }

        if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) { continue; }

        iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "Tx status %d was received",
                                status & TX_STATUS_MSK);
        break;
    }
}
#endif  // NEEDS_PORTING

/**
 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
 * @tx_resp: the Tx response from the fw (agg or non-agg)
 *
 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
 * it can't know that everything will go well until the end of the AMPDU, it
 * can't know in advance the number of MPDUs that will be sent in the current
 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
 * Hence, it can't know in advance what the SSN of the SCD will be at the end
 * of the batch. This is why the SSN of the SCD is written at the end of the
 * whole struct at a variable offset. This function knows how to cope with the
 * variable offset and returns the SSN of the SCD.
 */
static inline uint32_t iwl_mvm_get_scd_ssn(struct iwl_mvm* mvm, struct iwl_mvm_tx_resp* tx_resp) {
  return le32_to_cpup((__le32*)iwl_mvm_get_agg_status(mvm, tx_resp) + tx_resp->frame_count) & 0xfff;
}

static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
  // Since we don't free any buffer in FX, this function is not used.
  uint16_t sequence = le16_to_cpu(pkt->hdr.sequence);
  int txq_id = SEQ_TO_QUEUE(sequence);
  /* struct iwl_mvm_tx_resp_v3 is almost the same */
  struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
  uint16_t ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
#if 0   // NEEDS_PORTING
    struct ieee80211_sta* sta;
    int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
    int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
    struct agg_tx_status* agg_status = iwl_mvm_get_agg_status(mvm, tx_resp);
    uint32_t status = le16_to_cpu(agg_status->status);
    struct sk_buff_head skbs;
    uint8_t skb_freed = 0;
    uint8_t lq_color;
    uint16_t next_reclaimed, seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
    bool is_ndp = false;

    __skb_queue_head_init(&skbs);
#endif  // NEEDS_PORTING

  if (iwl_mvm_has_new_tx_api(mvm)) {
    txq_id = le16_to_cpu(tx_resp->tx_queue);
  }

  /* we can free until ssn % q.n_bd not inclusive */
  iwl_trans_reclaim(mvm->trans, txq_id, ssn);

#if 0  // NEEDS_PORTING
    while (!skb_queue_empty(&skbs)) {
        struct sk_buff* skb = __skb_dequeue(&skbs);
        struct ieee80211_tx_info* info = IEEE80211_SKB_CB(skb);
        struct ieee80211_hdr* hdr = (void*)skb->data;
        bool flushed = false;

#ifdef CPTCFG_MAC80211_LATENCY_MEASUREMENTS
        iwl_mvm_tx_lat_add_ts_ack(skb);
#endif
        skb_freed++;

        iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);

        memset(&info->status, 0, sizeof(info->status));

        /* inform mac80211 about what happened with the frame */
        switch (status & TX_STATUS_MSK) {
        case TX_STATUS_SUCCESS:
        case TX_STATUS_DIRECT_DONE:
            info->flags |= IEEE80211_TX_STAT_ACK;
            break;
        case TX_STATUS_FAIL_FIFO_FLUSHED:
        case TX_STATUS_FAIL_DRAIN_FLOW:
            flushed = true;
            break;
        case TX_STATUS_FAIL_DEST_PS:
            /* the FW should have stopped the queue and not
             * return this status
             */
            WARN_ON(1);
            info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
            break;
        default:
            break;
        }

        if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
            ieee80211_is_mgmt(hdr->frame_control)) {
            iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
        }

        /*
         * If we are freeing multiple frames, mark all the frames
         * but the first one as acked, since they were acknowledged
         * before
         * */
        if (skb_freed > 1) { info->flags |= IEEE80211_TX_STAT_ACK; }

        iwl_mvm_tx_status_check_trigger(mvm, status);

        info->status.rates[0].count = tx_resp->failure_frame + 1;
        iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), info);
        info->status.status_driver_data[1] = (void*)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);

        /* Single frame failure in an AMPDU queue => send BAR */
        if (info->flags & IEEE80211_TX_CTL_AMPDU && !(info->flags & IEEE80211_TX_STAT_ACK) &&
            !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) &&
#ifdef CPTCFG_IWLMVM_AX_SOFTAP_TESTMODE
            !flushed && mvm->is_bar_enabled)
#else
            !flushed)
#endif
            info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
        info->flags &= ~IEEE80211_TX_CTL_AMPDU;

        /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
        if (ieee80211_is_back_req(hdr->frame_control)) {
            seq_ctl = 0;
        } else if (status != TX_STATUS_SUCCESS) {
            seq_ctl = le16_to_cpu(hdr->seq_ctrl);
        }

        if (unlikely(!seq_ctl)) {
            struct ieee80211_hdr* hdr = (void*)skb->data;

            /*
             * If it is an NDP, we can't update next_reclaim since
             * its sequence control is 0. Note that for that same
             * reason, NDPs are never sent to A-MPDU'able queues
             * so that we can never have more than one freed frame
             * for a single Tx resonse (see WARN_ON below).
             */
            if (ieee80211_is_qos_nullfunc(hdr->frame_control)) { is_ndp = true; }
        }

        /*
         * TODO: this is not accurate if we are freeing more than one
         * packet.
         */
        info->status.tx_time = le16_to_cpu(tx_resp->wireless_media_time);
        BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
        lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
        info->status.status_driver_data[0] = RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);

#ifdef CPTCFG_IWLMVM_TDLS_PEER_CACHE
        if (info->flags & IEEE80211_TX_STAT_ACK) {
            iwl_mvm_tdls_peer_cache_pkt(mvm, (void*)skb->data, skb->len, -1);
        }
#endif  /* CPTCFG_IWLMVM_TDLS_PEER_CACHE */

        ieee80211_tx_status(mvm->hw, skb);
    }

    // TODO(49530): Supports Shared Tx Queue.
    /* This is an aggregation queue or might become one, so we use
     * the ssn since: ssn = wifi seq_num % 256.
     * The seq_ctl is the sequence control of the packet to which
     * this Tx response relates. But if there is a hole in the
     * bitmap of the BA we received, this Tx response may allow to
     * reclaim the hole and all the subsequent packets that were
     * already acked. In that case, seq_ctl != ssn, and the next
     * packet to be reclaimed will be ssn and not seq_ctl. In that
     * case, several packets will be reclaimed even if
     * frame_count = 1.
     *
     * The ssn is the index (% 256) of the latest packet that has
     * treated (acked / dropped) + 1.
     */
    next_reclaimed = ssn;

    IWL_DEBUG_TX_REPLY(mvm, "TXQ %d status %s (0x%08x)\n", txq_id,
                       iwl_mvm_get_tx_fail_reason(status), status);

    IWL_DEBUG_TX_REPLY(
        mvm,
        "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
        le32_to_cpu(tx_resp->initial_rate), tx_resp->failure_frame, SEQ_TO_INDEX(sequence), ssn,
        next_reclaimed, seq_ctl);

    rcu_read_lock();

    sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
    /*
     * sta can't be NULL otherwise it'd mean that the sta has been freed in
     * the firmware while we still have packets for it in the Tx queues.
     */
    if (WARN_ON_ONCE(!sta)) { goto out; }

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

        iwl_mvm_tx_airtime(mvm, mvmsta, le16_to_cpu(tx_resp->wireless_media_time));

        if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
            mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
            iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
        }

        if (sta->wme && tid != IWL_MGMT_TID) {
            struct iwl_mvm_tid_data* tid_data = &mvmsta->tid_data[tid];
            bool send_eosp_ndp = false;

            spin_lock_bh(&mvmsta->lock);

            if (!is_ndp) {
                tid_data->next_reclaimed = next_reclaimed;
                IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", next_reclaimed);
            } else {
                IWL_DEBUG_TX_REPLY(mvm, "NDP - don't update next_reclaimed\n");
            }

            iwl_mvm_check_ratid_empty(mvm, sta, tid);

            if (mvmsta->sleep_tx_count) {
                mvmsta->sleep_tx_count--;
                if (mvmsta->sleep_tx_count && !iwl_mvm_tid_queued(mvm, tid_data)) {
                    /*
                     * The number of frames in the queue
                     * dropped to 0 even if we sent less
                     * frames than we thought we had on the
                     * Tx queue.
                     * This means we had holes in the BA
                     * window that we just filled, ask
                     * mac80211 to send EOSP since the
                     * firmware won't know how to do that.
                     * Send NDP and the firmware will send
                     * EOSP notification that will trigger
                     * a call to ieee80211_sta_eosp().
                     */
                    send_eosp_ndp = true;
                }
            }

            spin_unlock_bh(&mvmsta->lock);
            if (send_eosp_ndp) {
                iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, IEEE80211_FRAME_RELEASE_UAPSD, 1, tid,
                                                  false, false);
                mvmsta->sleep_tx_count = 0;
                ieee80211_send_eosp_nullfunc(sta, tid);
            }
        }

        if (mvmsta->next_status_eosp) {
            mvmsta->next_status_eosp = false;
            ieee80211_sta_eosp(sta);
        }
    }
out:
    rcu_read_unlock();
#endif  // NEEDS_PORTING
}

#if 0  // NEEDS_PORTING
#ifdef CPTCFG_IWLWIFI_DEBUG
#define AGG_TX_STATE_(x) \
  case AGG_TX_STATE_##x: \
    return #x
static const char* iwl_get_agg_tx_status(uint16_t status) {
    switch (status & AGG_TX_STATE_STATUS_MSK) {
        AGG_TX_STATE_(TRANSMITTED);
        AGG_TX_STATE_(UNDERRUN);
        AGG_TX_STATE_(BT_PRIO);
        AGG_TX_STATE_(FEW_BYTES);
        AGG_TX_STATE_(ABORT);
        AGG_TX_STATE_(TX_ON_AIR_DROP);
        AGG_TX_STATE_(LAST_SENT_TRY_CNT);
        AGG_TX_STATE_(LAST_SENT_BT_KILL);
        AGG_TX_STATE_(SCD_QUERY);
        AGG_TX_STATE_(TEST_BAD_CRC32);
        AGG_TX_STATE_(RESPONSE);
        AGG_TX_STATE_(DUMP_TX);
        AGG_TX_STATE_(DELAY_TX);
    }

    return "UNKNOWN";
}

static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
    struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
    struct agg_tx_status* frame_status = iwl_mvm_get_agg_status(mvm, tx_resp);
    int i;

    for (i = 0; i < tx_resp->frame_count; i++) {
        uint16_t fstatus = le16_to_cpu(frame_status[i].status);

        IWL_DEBUG_TX_REPLY(mvm, "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
                           iwl_get_agg_tx_status(fstatus), fstatus & AGG_TX_STATE_STATUS_MSK,
                           (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> AGG_TX_STATE_TRY_CNT_POS,
                           le16_to_cpu(frame_status[i].sequence));
    }
}
#else
static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {}
#endif  /* CPTCFG_IWLWIFI_DEBUG */
#endif  // NEEDS_PORTING

static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
#if 0   // NEEDS_PORTING
    struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
    int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
    int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
    uint16_t sequence = le16_to_cpu(pkt->hdr.sequence);
    struct iwl_mvm_sta* mvmsta;
    int queue = SEQ_TO_QUEUE(sequence);
    struct ieee80211_sta* sta;

    if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
                     (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) {
        return;
    }

    iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);

    rcu_read_lock();

    mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);

    sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
    if (WARN_ON_ONCE(!sta || !sta->wme)) {
        rcu_read_unlock();
        return;
    }

    if (!WARN_ON_ONCE(!mvmsta)) {
        mvmsta->tid_data[tid].rate_n_flags = le32_to_cpu(tx_resp->initial_rate);
        mvmsta->tid_data[tid].tx_time = le16_to_cpu(tx_resp->wireless_media_time);
        mvmsta->tid_data[tid].lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
        iwl_mvm_tx_airtime(mvm, mvmsta, le16_to_cpu(tx_resp->wireless_media_time));
    }

    rcu_read_unlock();
#endif  // NEEDS_PORTING
}

void iwl_mvm_rx_tx_cmd(struct iwl_mvm* mvm, struct iwl_rx_cmd_buffer* rxb) {
  struct iwl_rx_packet* pkt = rxb_addr(rxb);
  struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;

  if (tx_resp->frame_count == 1) {
    iwl_mvm_rx_tx_cmd_single(mvm, pkt);
  } else {
    iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
  }
}

#if 0  // NEEDS_PORTING
static void iwl_mvm_tx_reclaim(struct iwl_mvm* mvm, int sta_id, int tid, int txq, int index,
                               struct ieee80211_tx_info* ba_info, uint32_t rate) {
    struct sk_buff_head reclaimed_skbs;
    struct iwl_mvm_tid_data* tid_data;
    struct ieee80211_sta* sta;
    struct iwl_mvm_sta* mvmsta;
    struct sk_buff* skb;
    int freed;

    if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || tid > IWL_MAX_TID_COUNT, "sta_id %d tid %d",
                  sta_id, tid)) {
        return;
    }

    rcu_read_lock();

    sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

    /* Reclaiming frames for a station that has been deleted ? */
    if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
        rcu_read_unlock();
        return;
    }

    mvmsta = iwl_mvm_sta_from_mac80211(sta);
    tid_data = &mvmsta->tid_data[tid];

    if (tid_data->txq_id != txq) {
        IWL_ERR(mvm, "invalid BA notification: Q %d, tid %d\n", tid_data->txq_id, tid);
        rcu_read_unlock();
        return;
    }

    __skb_queue_head_init(&reclaimed_skbs);

    /*
     * Release all TFDs before the SSN, i.e. all TFDs in front of
     * block-ack window (we assume that they've been successfully
     * transmitted ... if not, it's too late anyway).
     */
    iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);

    spin_lock_bh(&mvmsta->lock);

    tid_data->next_reclaimed = index;

    iwl_mvm_check_ratid_empty(mvm, sta, tid);

    freed = 0;

    /* pack lq color from tid_data along the reduced txp */
    ba_info->status.status_driver_data[0] =
        RS_DRV_DATA_PACK(tid_data->lq_color, ba_info->status.status_driver_data[0]);
    ba_info->status.status_driver_data[1] = (void*)(uintptr_t)rate;

    skb_queue_walk(&reclaimed_skbs, skb) {
        struct ieee80211_hdr* hdr = (void*)skb->data;
        struct ieee80211_tx_info* info = IEEE80211_SKB_CB(skb);

#ifdef CPTCFG_MAC80211_LATENCY_MEASUREMENTS
        iwl_mvm_tx_lat_add_ts_ack(skb);
#endif
        if (ieee80211_is_data_qos(hdr->frame_control)) {
            freed++;
        } else {
            WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
        }

        iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);

        memset(&info->status, 0, sizeof(info->status));
        /* Packet was transmitted successfully, failures come as single
         * frames because before failing a frame the firmware transmits
         * it without aggregation at least once.
         */
        info->flags |= IEEE80211_TX_STAT_ACK;

#ifdef CPTCFG_IWLMVM_TDLS_PEER_CACHE
        iwl_mvm_tdls_peer_cache_pkt(mvm, hdr, skb->len, -1);
#endif  /* CPTCFG_IWLMVM_TDLS_PEER_CACHE */

        /* this is the first skb we deliver in this batch */
        /* put the rate scaling data there */
        if (freed == 1) {
            info->flags |= IEEE80211_TX_STAT_AMPDU;
            memcpy(&info->status, &ba_info->status, sizeof(ba_info->status));
            iwl_mvm_hwrate_to_tx_status(rate, info);
        }
    }

    spin_unlock_bh(&mvmsta->lock);

    /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
     * possible (i.e. first MPDU in the aggregation wasn't acked)
     * Still it's important to update RS about sent vs. acked.
     */
    if (skb_queue_empty(&reclaimed_skbs)) {
        struct ieee80211_chanctx_conf* chanctx_conf = NULL;

        if (mvmsta->vif) { chanctx_conf = rcu_dereference(mvmsta->vif->chanctx_conf); }

        if (WARN_ON_ONCE(!chanctx_conf)) { goto out; }

        ba_info->band = chanctx_conf->def.chan->band;
        iwl_mvm_hwrate_to_tx_status(rate, ba_info);

        if (!iwl_mvm_has_tlc_offload(mvm)) {
            IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
            iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
        }
    }

out:
    rcu_read_unlock();

    while (!skb_queue_empty(&reclaimed_skbs)) {
        skb = __skb_dequeue(&reclaimed_skbs);
        ieee80211_tx_status(mvm->hw, skb);
    }
}
#endif  // NEEDS_PORTING

void iwl_mvm_rx_ba_notif(struct iwl_mvm* mvm, struct iwl_rx_cmd_buffer* rxb) {
#if 0   // NEEDS_PORTING
    struct iwl_rx_packet* pkt = rxb_addr(rxb);
    int sta_id, tid, txq, index;
    struct ieee80211_tx_info ba_info = {};
    struct iwl_mvm_ba_notif* ba_notif;
    struct iwl_mvm_tid_data* tid_data;
    struct iwl_mvm_sta* mvmsta;

    ba_info.flags = IEEE80211_TX_STAT_AMPDU;

    if (iwl_mvm_has_new_tx_api(mvm)) {
        struct iwl_mvm_compressed_ba_notif* ba_res = (void*)pkt->data;
        uint8_t lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
        int i;

        sta_id = ba_res->sta_id;
        ba_info.status.ampdu_ack_len = (uint8_t)le16_to_cpu(ba_res->done);
        ba_info.status.ampdu_len = (uint8_t)le16_to_cpu(ba_res->txed);
        ba_info.status.tx_time = (uint16_t)le32_to_cpu(ba_res->wireless_time);
        ba_info.status.status_driver_data[0] = (void*)(uintptr_t)ba_res->reduced_txp;

        if (!le16_to_cpu(ba_res->tfd_cnt)) { goto out; }

        rcu_read_lock();

        mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
        if (!mvmsta) { goto out_unlock; }

        /* Free per TID */
        for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
            struct iwl_mvm_compressed_ba_tfd* ba_tfd = &ba_res->tfd[i];

            tid = ba_tfd->tid;
            if (tid == IWL_MGMT_TID) { tid = IWL_MAX_TID_COUNT; }

            mvmsta->tid_data[i].lq_color = lq_color;
            iwl_mvm_tx_reclaim(mvm, sta_id, tid, (int)(le16_to_cpu(ba_tfd->q_num)),
                               le16_to_cpu(ba_tfd->tfd_index), &ba_info,
                               le32_to_cpu(ba_res->tx_rate));
        }

        iwl_mvm_tx_airtime(mvm, mvmsta, le32_to_cpu(ba_res->wireless_time));
    out_unlock:
        rcu_read_unlock();
    out:
        IWL_DEBUG_TX_REPLY(
            mvm, "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", sta_id,
            le32_to_cpu(ba_res->flags), le16_to_cpu(ba_res->txed), le16_to_cpu(ba_res->done));
        return;
    }

    ba_notif = (void*)pkt->data;
    sta_id = ba_notif->sta_id;
    tid = ba_notif->tid;
    /* "flow" corresponds to Tx queue */
    txq = le16_to_cpu(ba_notif->scd_flow);
    /* "ssn" is start of block-ack Tx window, corresponds to index
     * (in Tx queue's circular buffer) of first TFD/frame in window */
    index = le16_to_cpu(ba_notif->scd_ssn);

    rcu_read_lock();
    mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
    if (WARN_ON_ONCE(!mvmsta)) {
        rcu_read_unlock();
        return;
    }

    tid_data = &mvmsta->tid_data[tid];

    ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
    ba_info.status.ampdu_len = ba_notif->txed;
    ba_info.status.tx_time = tid_data->tx_time;
    ba_info.status.status_driver_data[0] = (void*)(uintptr_t)ba_notif->reduced_txp;

    rcu_read_unlock();

    iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, tid_data->rate_n_flags);

    IWL_DEBUG_TX_REPLY(mvm, "BA_NOTIFICATION Received from %pM, sta_id = %d\n", ba_notif->sta_addr,
                       ba_notif->sta_id);

    IWL_DEBUG_TX_REPLY(
        mvm,
        "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
        ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), le64_to_cpu(ba_notif->bitmap), txq, index,
        ba_notif->txed, ba_notif->txed_2_done);

    IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", ba_notif->reduced_txp);
#endif  // NEEDS_PORTING
}

/*
 * Note that there are transports that buffer frames before they reach
 * the firmware. This means that after flush_tx_path is called, the
 * queue might not be empty. The race-free way to handle this is to:
 * 1) set the station as draining
 * 2) flush the Tx path
 * 3) wait for the transport queues to be empty
 */
zx_status_t iwl_mvm_flush_tx_path(struct iwl_mvm* mvm, uint32_t tfd_msk, uint32_t flags) {
  zx_status_t ret;
  struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
      .queues_ctl = cpu_to_le32(tfd_msk),
      .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
  };

  WARN_ON(iwl_mvm_has_new_tx_api(mvm));

  ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, sizeof(flush_cmd), &flush_cmd);
  if (ret != ZX_OK) {
    IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
  }
  return ret;
}

zx_status_t iwl_mvm_flush_sta_tids(struct iwl_mvm* mvm, uint32_t sta_id, uint16_t tids,
                                   uint32_t flags) {
  zx_status_t ret;
  struct iwl_tx_path_flush_cmd flush_cmd = {
      .sta_id = cpu_to_le32(sta_id),
      .tid_mask = cpu_to_le16(tids),
  };

  WARN_ON(!iwl_mvm_has_new_tx_api(mvm));

  ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, sizeof(flush_cmd), &flush_cmd);
  if (ret != ZX_OK) {
    IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
  }
  return ret;
}

zx_status_t iwl_mvm_flush_sta(struct iwl_mvm* mvm, void* sta, bool internal, uint32_t flags) {
  struct iwl_mvm_int_sta* int_sta = sta;
  struct iwl_mvm_sta* mvm_sta = sta;

  BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != offsetof(struct iwl_mvm_sta, sta_id));

  if (iwl_mvm_has_new_tx_api(mvm)) {
    return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xff | BIT(IWL_MGMT_TID), flags);
  }

  if (internal) {
    return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, flags);
  }

  return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
}