Merge remote-tracking branch 'wireless-next/master' into mac80211-next

1 files changed, 1388 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/tx.c b/drivers/net/wireless/iwlwifi/dvm/tx.c
new file mode 100644
index 00000000000..5971a23aa47
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/dvm/tx.c
@@ -0,0 +1,1388 @@
+/******************************************************************************
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ieee80211.h>
+#include "iwl-io.h"
+#include "iwl-trans.h"
+#include "iwl-agn-hw.h"
+#include "dev.h"
+#include "agn.h"
+
+static const u8 tid_to_ac[] = {
+        IEEE80211_AC_BE,
+        IEEE80211_AC_BK,
+        IEEE80211_AC_BK,
+        IEEE80211_AC_BE,
+        IEEE80211_AC_VI,
+        IEEE80211_AC_VI,
+        IEEE80211_AC_VO,
+        IEEE80211_AC_VO,
+};
+
+static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
+                                     struct ieee80211_tx_info *info,
+                                     __le16 fc, __le32 *tx_flags)
+{
+        if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
+            info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
+            info->flags & IEEE80211_TX_CTL_AMPDU)
+                *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
+}
+
+/*
+ * handle build REPLY_TX command notification.
+ */
+static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
+                                      struct sk_buff *skb,
+                                      struct iwl_tx_cmd *tx_cmd,
+                                      struct ieee80211_tx_info *info,
+                                      struct ieee80211_hdr *hdr, u8 sta_id)
+{
+        __le16 fc = hdr->frame_control;
+        __le32 tx_flags = tx_cmd->tx_flags;
+
+        tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
+
+        if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
+                tx_flags |= TX_CMD_FLG_ACK_MSK;
+        else
+                tx_flags &= ~TX_CMD_FLG_ACK_MSK;
+
+        if (ieee80211_is_probe_resp(fc))
+                tx_flags |= TX_CMD_FLG_TSF_MSK;
+        else if (ieee80211_is_back_req(fc))
+                tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
+        else if (info->band == IEEE80211_BAND_2GHZ &&
+                 priv->cfg->bt_params &&
+                 priv->cfg->bt_params->advanced_bt_coexist &&
+                 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
+                 ieee80211_is_reassoc_req(fc) ||
+                 skb->protocol == cpu_to_be16(ETH_P_PAE)))
+                tx_flags |= TX_CMD_FLG_IGNORE_BT;
+
+
+        tx_cmd->sta_id = sta_id;
+        if (ieee80211_has_morefrags(fc))
+                tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
+
+        if (ieee80211_is_data_qos(fc)) {
+                u8 *qc = ieee80211_get_qos_ctl(hdr);
+                tx_cmd->tid_tspec = qc[0] & 0xf;
+                tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
+        } else {
+                tx_cmd->tid_tspec = IWL_TID_NON_QOS;
+                if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
+                        tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
+                else
+                        tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
+        }
+
+        iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
+
+        tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
+        if (ieee80211_is_mgmt(fc)) {
+                if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
+                        tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
+                else
+                        tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
+        } else {
+                tx_cmd->timeout.pm_frame_timeout = 0;
+        }
+
+        tx_cmd->driver_txop = 0;
+        tx_cmd->tx_flags = tx_flags;
+        tx_cmd->next_frame_len = 0;
+}
+
+static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
+                                     struct iwl_tx_cmd *tx_cmd,
+                                     struct ieee80211_tx_info *info,
+                                     __le16 fc)
+{
+        u32 rate_flags;
+        int rate_idx;
+        u8 rts_retry_limit;
+        u8 data_retry_limit;
+        u8 rate_plcp;
+
+        if (priv->wowlan) {
+                rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
+                data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
+        } else {
+                /* Set retry limit on RTS packets */
+                rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
+
+                /* Set retry limit on DATA packets and Probe Responses*/
+                if (ieee80211_is_probe_resp(fc)) {
+                        data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
+                        rts_retry_limit =
+                                min(data_retry_limit, rts_retry_limit);
+                } else if (ieee80211_is_back_req(fc))
+                        data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
+                else
+                        data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
+        }
+
+        tx_cmd->data_retry_limit = data_retry_limit;
+        tx_cmd->rts_retry_limit = rts_retry_limit;
+
+        /* DATA packets will use the uCode station table for rate/antenna
+         * selection */
+        if (ieee80211_is_data(fc)) {
+                tx_cmd->initial_rate_index = 0;
+                tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
+#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
+                if (priv->tm_fixed_rate) {
+                        /*
+                         * rate overwrite by testmode
+                         * we not only send lq command to change rate
+                         * we also re-enforce per data pkt base.
+                         */
+                        tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
+                        memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
+                               sizeof(tx_cmd->rate_n_flags));
+                }
+#endif
+                return;
+        } else if (ieee80211_is_back_req(fc))
+                tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
+
+        /**
+         * If the current TX rate stored in mac80211 has the MCS bit set, it's
+         * not really a TX rate.  Thus, we use the lowest supported rate for
+         * this band.  Also use the lowest supported rate if the stored rate
+         * index is invalid.
+         */
+        rate_idx = info->control.rates[0].idx;
+        if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
+                        (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
+                rate_idx = rate_lowest_index(
+                                &priv->eeprom_data->bands[info->band],
+                                info->control.sta);
+        /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
+        if (info->band == IEEE80211_BAND_5GHZ)
+                rate_idx += IWL_FIRST_OFDM_RATE;
+        /* Get PLCP rate for tx_cmd->rate_n_flags */
+        rate_plcp = iwl_rates[rate_idx].plcp;
+        /* Zero out flags for this packet */
+        rate_flags = 0;
+
+        /* Set CCK flag as needed */
+        if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
+                rate_flags |= RATE_MCS_CCK_MSK;
+
+        /* Set up antennas */
+         if (priv->cfg->bt_params &&
+             priv->cfg->bt_params->advanced_bt_coexist &&
+             priv->bt_full_concurrent) {
+                /* operated as 1x1 in full concurrency mode */
+                priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
+                                first_antenna(priv->eeprom_data->valid_tx_ant));
+        } else
+                priv->mgmt_tx_ant = iwl_toggle_tx_ant(
+                                        priv, priv->mgmt_tx_ant,
+                                        priv->eeprom_data->valid_tx_ant);
+        rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
+
+        /* Set the rate in the TX cmd */
+        tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
+}
+
+static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
+                                         struct ieee80211_tx_info *info,
+                                         struct iwl_tx_cmd *tx_cmd,
+                                         struct sk_buff *skb_frag)
+{
+        struct ieee80211_key_conf *keyconf = info->control.hw_key;
+
+        switch (keyconf->cipher) {
+        case WLAN_CIPHER_SUITE_CCMP:
+                tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
+                memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
+                if (info->flags & IEEE80211_TX_CTL_AMPDU)
+                        tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
+                IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
+                break;
+
+        case WLAN_CIPHER_SUITE_TKIP:
+                tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
+                ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
+                IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
+                break;
+
+        case WLAN_CIPHER_SUITE_WEP104:
+                tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
+                /* fall through */
+        case WLAN_CIPHER_SUITE_WEP40:
+                tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
+                        (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
+
+                memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
+
+                IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
+                             "with key %d\n", keyconf->keyidx);
+                break;
+
+        default:
+                IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
+                break;
+        }
+}
+
+/**
+ * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
+ * @context: the current context
+ * @sta: mac80211 station
+ *
+ * In certain circumstances mac80211 passes a station pointer
+ * that may be %NULL, for example during TX or key setup. In
+ * that case, we need to use the broadcast station, so this
+ * inline wraps that pattern.
+ */
+static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
+                                   struct ieee80211_sta *sta)
+{
+        int sta_id;
+
+        if (!sta)
+                return context->bcast_sta_id;
+
+        sta_id = iwl_sta_id(sta);
+
+        /*
+         * mac80211 should not be passing a partially
+         * initialised station!
+         */
+        WARN_ON(sta_id == IWL_INVALID_STATION);
+
+        return sta_id;
+}
+
+/*
+ * start REPLY_TX command process
+ */
+int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
+{
+        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+        struct iwl_station_priv *sta_priv = NULL;
+        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+        struct iwl_device_cmd *dev_cmd;
+        struct iwl_tx_cmd *tx_cmd;
+        __le16 fc;
+        u8 hdr_len;
+        u16 len, seq_number = 0;
+        u8 sta_id, tid = IWL_MAX_TID_COUNT;
+        bool is_agg = false;
+        int txq_id;
+
+        if (info->control.vif)
+                ctx = iwl_rxon_ctx_from_vif(info->control.vif);
+
+        if (iwl_is_rfkill(priv)) {
+                IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
+                goto drop_unlock_priv;
+        }
+
+        fc = hdr->frame_control;
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if (ieee80211_is_auth(fc))
+                IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
+        else if (ieee80211_is_assoc_req(fc))
+                IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
+        else if (ieee80211_is_reassoc_req(fc))
+                IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
+#endif
+
+        if (unlikely(ieee80211_is_probe_resp(fc))) {
+                struct iwl_wipan_noa_data *noa_data =
+                        rcu_dereference(priv->noa_data);
+
+                if (noa_data &&
+                    pskb_expand_head(skb, 0, noa_data->length,
+                                     GFP_ATOMIC) == 0) {
+                        memcpy(skb_put(skb, noa_data->length),
+                               noa_data->data, noa_data->length);
+                        hdr = (struct ieee80211_hdr *)skb->data;
+                }
+        }
+
+        hdr_len = ieee80211_hdrlen(fc);
+
+        /* For management frames use broadcast id to do not break aggregation */
+        if (!ieee80211_is_data(fc))
+                sta_id = ctx->bcast_sta_id;
+        else {
+                /* Find index into station table for destination station */
+                sta_id = iwl_sta_id_or_broadcast(ctx, info->control.sta);
+                if (sta_id == IWL_INVALID_STATION) {
+                        IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
+                                       hdr->addr1);
+                        goto drop_unlock_priv;
+                }
+        }
+
+        IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
+
+        if (info->control.sta)
+                sta_priv = (void *)info->control.sta->drv_priv;
+
+        if (sta_priv && sta_priv->asleep &&
+            (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
+                /*
+                 * This sends an asynchronous command to the device,
+                 * but we can rely on it being processed before the
+                 * next frame is processed -- and the next frame to
+                 * this station is the one that will consume this
+                 * counter.
+                 * For now set the counter to just 1 since we do not
+                 * support uAPSD yet.
+                 *
+                 * FIXME: If we get two non-bufferable frames one
+                 * after the other, we might only send out one of
+                 * them because this is racy.
+                 */
+                iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
+        }
+
+        if (info->flags & IEEE80211_TX_CTL_AMPDU)
+                is_agg = true;
+
+        dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
+
+        if (unlikely(!dev_cmd))
+                goto drop_unlock_priv;
+
+        memset(dev_cmd, 0, sizeof(*dev_cmd));
+        tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
+
+        /* Total # bytes to be transmitted */
+        len = (u16)skb->len;
+        tx_cmd->len = cpu_to_le16(len);
+
+        if (info->control.hw_key)
+                iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
+
+        /* TODO need this for burst mode later on */
+        iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
+
+        iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
+
+        memset(&info->status, 0, sizeof(info->status));
+
+        info->driver_data[0] = ctx;
+        info->driver_data[1] = dev_cmd;
+        /* From now on, we cannot access info->control */
+
+        spin_lock(&priv->sta_lock);
+
+        if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
+                u8 *qc = NULL;
+                struct iwl_tid_data *tid_data;
+                qc = ieee80211_get_qos_ctl(hdr);
+                tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
+                if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
+                        goto drop_unlock_sta;
+                tid_data = &priv->tid_data[sta_id][tid];
+
+                /* aggregation is on for this <sta,tid> */
+                if (info->flags & IEEE80211_TX_CTL_AMPDU &&
+                    tid_data->agg.state != IWL_AGG_ON) {
+                        IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
+                                " Tx flags = 0x%08x, agg.state = %d",
+                                info->flags, tid_data->agg.state);
+                        IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
+                                sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
+                        goto drop_unlock_sta;
+                }
+
+                /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
+                 * only. Check this here.
+                 */
+                if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
+                    tid_data->agg.state != IWL_AGG_OFF,
+                    "Tx while agg.state = %d", tid_data->agg.state))
+                        goto drop_unlock_sta;
+
+                seq_number = tid_data->seq_number;
+                seq_number &= IEEE80211_SCTL_SEQ;
+                hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+                hdr->seq_ctrl |= cpu_to_le16(seq_number);
+                seq_number += 0x10;
+        }
+
+        /* Copy MAC header from skb into command buffer */
+        memcpy(tx_cmd->hdr, hdr, hdr_len);
+
+        if (is_agg)
+                txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
+        else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
+                /*
+                 * Send this frame after DTIM -- there's a special queue
+                 * reserved for this for contexts that support AP mode.
+                 */
+                txq_id = ctx->mcast_queue;
+
+                /*
+                 * The microcode will clear the more data
+                 * bit in the last frame it transmits.
+                 */
+                hdr->frame_control |=
+                        cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+        } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
+                txq_id = IWL_AUX_QUEUE;
+        else
+                txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
+
+        WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
+        WARN_ON_ONCE(is_agg &&
+                     priv->queue_to_mac80211[txq_id] != info->hw_queue);
+
+        if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
+                goto drop_unlock_sta;
+
+        if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
+            !ieee80211_has_morefrags(fc))
+                priv->tid_data[sta_id][tid].seq_number = seq_number;
+
+        spin_unlock(&priv->sta_lock);
+
+        /*
+         * Avoid atomic ops if it isn't an associated client.
+         * Also, if this is a packet for aggregation, don't
+         * increase the counter because the ucode will stop
+         * aggregation queues when their respective station
+         * goes to sleep.
+         */
+        if (sta_priv && sta_priv->client && !is_agg)
+                atomic_inc(&sta_priv->pending_frames);
+
+        if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
+                iwl_scan_offchannel_skb(priv);
+
+        return 0;
+
+drop_unlock_sta:
+        if (dev_cmd)
+                iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
+        spin_unlock(&priv->sta_lock);
+drop_unlock_priv:
+        return -1;
+}
+
+static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
+{
+        int q;
+
+        for (q = IWLAGN_FIRST_AMPDU_QUEUE;
+             q < priv->cfg->base_params->num_of_queues; q++) {
+                if (!test_and_set_bit(q, priv->agg_q_alloc)) {
+                        priv->queue_to_mac80211[q] = mq;
+                        return q;
+                }
+        }
+
+        return -ENOSPC;
+}
+
+static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
+{
+        clear_bit(q, priv->agg_q_alloc);
+        priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
+}
+
+int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
+                        struct ieee80211_sta *sta, u16 tid)
+{
+        struct iwl_tid_data *tid_data;
+        int sta_id, txq_id;
+        enum iwl_agg_state agg_state;
+
+        sta_id = iwl_sta_id(sta);
+
+        if (sta_id == IWL_INVALID_STATION) {
+                IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
+                return -ENXIO;
+        }
+
+        spin_lock_bh(&priv->sta_lock);
+
+        tid_data = &priv->tid_data[sta_id][tid];
+        txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
+
+        switch (priv->tid_data[sta_id][tid].agg.state) {
+        case IWL_EMPTYING_HW_QUEUE_ADDBA:
+                /*
+                * This can happen if the peer stops aggregation
+                * again before we've had a chance to drain the
+                * queue we selected previously, i.e. before the
+                * session was really started completely.
+                */
+                IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
+                goto turn_off;
+        case IWL_AGG_STARTING:
+                /*
+                 * This can happen when the session is stopped before
+                 * we receive ADDBA response
+                 */
+                IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
+                goto turn_off;
+        case IWL_AGG_ON:
+                break;
+        default:
+                IWL_WARN(priv, "Stopping AGG while state not ON "
+                         "or starting for %d on %d (%d)\n", sta_id, tid,
+                         priv->tid_data[sta_id][tid].agg.state);
+                spin_unlock_bh(&priv->sta_lock);
+                return 0;
+        }
+
+        tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
+
+        /* There are still packets for this RA / TID in the HW */
+        if (!test_bit(txq_id, priv->agg_q_alloc)) {
+                IWL_DEBUG_TX_QUEUES(priv,
+                        "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
+                        sta_id, tid, txq_id);
+        } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
+                IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
+                                    "next_recl = %d\n",
+                                    tid_data->agg.ssn,
+                                    tid_data->next_reclaimed);
+                priv->tid_data[sta_id][tid].agg.state =
+                        IWL_EMPTYING_HW_QUEUE_DELBA;
+                spin_unlock_bh(&priv->sta_lock);
+                return 0;
+        }
+
+        IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
+                            tid_data->agg.ssn);
+turn_off:
+        agg_state = priv->tid_data[sta_id][tid].agg.state;
+        priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
+
+        spin_unlock_bh(&priv->sta_lock);
+
+        if (test_bit(txq_id, priv->agg_q_alloc)) {
+                /*
+                 * If the transport didn't know that we wanted to start
+                 * agreggation, don't tell it that we want to stop them.
+                 * This can happen when we don't get the addBA response on
+                 * time, or we hadn't time to drain the AC queues.
+                 */
+                if (agg_state == IWL_AGG_ON)
+                        iwl_trans_txq_disable(priv->trans, txq_id);
+                else
+                        IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
+                                            agg_state);
+                iwlagn_dealloc_agg_txq(priv, txq_id);
+        }
+
+        ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+
+        return 0;
+}
+
+int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
+                        struct ieee80211_sta *sta, u16 tid, u16 *ssn)
+{
+        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+        struct iwl_tid_data *tid_data;
+        int sta_id, txq_id, ret;
+
+        IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
+                     sta->addr, tid);
+
+        sta_id = iwl_sta_id(sta);
+        if (sta_id == IWL_INVALID_STATION) {
+                IWL_ERR(priv, "Start AGG on invalid station\n");
+                return -ENXIO;
+        }
+        if (unlikely(tid >= IWL_MAX_TID_COUNT))
+                return -EINVAL;
+
+        if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
+                IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
+                return -ENXIO;
+        }
+
+        txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
+        if (txq_id < 0) {
+                IWL_DEBUG_TX_QUEUES(priv,
+                        "No free aggregation queue for %pM/%d\n",
+                        sta->addr, tid);
+                return txq_id;
+        }
+
+        ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
+        if (ret)
+                return ret;
+
+        spin_lock_bh(&priv->sta_lock);
+        tid_data = &priv->tid_data[sta_id][tid];
+        tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
+        tid_data->agg.txq_id = txq_id;
+
+        *ssn = tid_data->agg.ssn;
+
+        if (*ssn == tid_data->next_reclaimed) {
+                IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
+                                    tid_data->agg.ssn);
+                tid_data->agg.state = IWL_AGG_STARTING;
+                ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+        } else {
+                IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
+                                    "next_reclaimed = %d\n",
+                                    tid_data->agg.ssn,
+                                    tid_data->next_reclaimed);
+                tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
+        }
+        spin_unlock_bh(&priv->sta_lock);
+
+        return ret;
+}
+
+int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
+                        struct ieee80211_sta *sta, u16 tid, u8 buf_size)
+{
+        struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
+        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
+        int q, fifo;
+        u16 ssn;
+
+        buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
+
+        spin_lock_bh(&priv->sta_lock);
+        ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
+        q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
+        priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
+        spin_unlock_bh(&priv->sta_lock);
+
+        fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
+
+        iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
+                             buf_size, ssn);
+
+        /*
+         * If the limit is 0, then it wasn't initialised yet,
+         * use the default. We can do that since we take the
+         * minimum below, and we don't want to go above our
+         * default due to hardware restrictions.
+         */
+        if (sta_priv->max_agg_bufsize == 0)
+                sta_priv->max_agg_bufsize =
+                        LINK_QUAL_AGG_FRAME_LIMIT_DEF;
+
+        /*
+         * Even though in theory the peer could have different
+         * aggregation reorder buffer sizes for different sessions,
+         * our ucode doesn't allow for that and has a global limit
+         * for each station. Therefore, use the minimum of all the
+         * aggregation sessions and our default value.
+         */
+        sta_priv->max_agg_bufsize =
+                min(sta_priv->max_agg_bufsize, buf_size);
+
+        if (priv->hw_params.use_rts_for_aggregation) {
+                /*
+                 * switch to RTS/CTS if it is the prefer protection
+                 * method for HT traffic
+                 */
+
+                sta_priv->lq_sta.lq.general_params.flags |=
+                        LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
+        }
+        priv->agg_tids_count++;
+        IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
+                     priv->agg_tids_count);
+
+        sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
+                sta_priv->max_agg_bufsize;
+
+        IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
+                 sta->addr, tid);
+
+        return iwl_send_lq_cmd(priv, ctx,
+                        &sta_priv->lq_sta.lq, CMD_ASYNC, false);
+}
+
+static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
+{
+        struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
+        enum iwl_rxon_context_id ctx;
+        struct ieee80211_vif *vif;
+        u8 *addr;
+
+        lockdep_assert_held(&priv->sta_lock);
+
+        addr = priv->stations[sta_id].sta.sta.addr;
+        ctx = priv->stations[sta_id].ctxid;
+        vif = priv->contexts[ctx].vif;
+
+        switch (priv->tid_data[sta_id][tid].agg.state) {
+        case IWL_EMPTYING_HW_QUEUE_DELBA:
+                /* There are no packets for this RA / TID in the HW any more */
+                if (tid_data->agg.ssn == tid_data->next_reclaimed) {
+                        IWL_DEBUG_TX_QUEUES(priv,
+                                "Can continue DELBA flow ssn = next_recl ="
+                                " %d", tid_data->next_reclaimed);
+                        iwl_trans_txq_disable(priv->trans,
+                                              tid_data->agg.txq_id);
+                        iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
+                        tid_data->agg.state = IWL_AGG_OFF;
+                        ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
+                }
+                break;
+        case IWL_EMPTYING_HW_QUEUE_ADDBA:
+                /* There are no packets for this RA / TID in the HW any more */
+                if (tid_data->agg.ssn == tid_data->next_reclaimed) {
+                        IWL_DEBUG_TX_QUEUES(priv,
+                                "Can continue ADDBA flow ssn = next_recl ="
+                                " %d", tid_data->next_reclaimed);
+                        tid_data->agg.state = IWL_AGG_STARTING;
+                        ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
+                }
+                break;
+        default:
+                break;
+        }
+}
+
+static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
+                                     struct iwl_rxon_context *ctx,
+                                     const u8 *addr1)
+{
+        struct ieee80211_sta *sta;
+        struct iwl_station_priv *sta_priv;
+
+        rcu_read_lock();
+        sta = ieee80211_find_sta(ctx->vif, addr1);
+        if (sta) {
+                sta_priv = (void *)sta->drv_priv;
+                /* avoid atomic ops if this isn't a client */
+                if (sta_priv->client &&
+                    atomic_dec_return(&sta_priv->pending_frames) == 0)
+                        ieee80211_sta_block_awake(priv->hw, sta, false);
+        }
+        rcu_read_unlock();
+}
+
+/**
+ * translate ucode response to mac80211 tx status control values
+ */
+static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 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);
+        if (rate_n_flags & RATE_MCS_HT_MSK)
+                r->flags |= IEEE80211_TX_RC_MCS;
+        if (rate_n_flags & RATE_MCS_GF_MSK)
+                r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
+        if (rate_n_flags & RATE_MCS_HT40_MSK)
+                r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+        if (rate_n_flags & RATE_MCS_DUP_MSK)
+                r->flags |= IEEE80211_TX_RC_DUP_DATA;
+        if (rate_n_flags & RATE_MCS_SGI_MSK)
+                r->flags |= IEEE80211_TX_RC_SHORT_GI;
+        r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+const char *iwl_get_tx_fail_reason(u32 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(FIFO_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(INSUFFICIENT_CF_POLL);
+        TX_STATUS_FAIL(PASSIVE_NO_RX);
+        TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
+        }
+
+        return "UNKNOWN";
+
+#undef TX_STATUS_FAIL
+#undef TX_STATUS_POSTPONE
+}
+#endif /* CONFIG_IWLWIFI_DEBUG */
+
+static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
+{
+        status &= AGG_TX_STATUS_MSK;
+
+        switch (status) {
+        case AGG_TX_STATE_UNDERRUN_MSK:
+                priv->reply_agg_tx_stats.underrun++;
+                break;
+        case AGG_TX_STATE_BT_PRIO_MSK:
+                priv->reply_agg_tx_stats.bt_prio++;
+                break;
+        case AGG_TX_STATE_FEW_BYTES_MSK:
+                priv->reply_agg_tx_stats.few_bytes++;
+                break;
+        case AGG_TX_STATE_ABORT_MSK:
+                priv->reply_agg_tx_stats.abort++;
+                break;
+        case AGG_TX_STATE_LAST_SENT_TTL_MSK:
+                priv->reply_agg_tx_stats.last_sent_ttl++;
+                break;
+        case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
+                priv->reply_agg_tx_stats.last_sent_try++;
+                break;
+        case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
+                priv->reply_agg_tx_stats.last_sent_bt_kill++;
+                break;
+        case AGG_TX_STATE_SCD_QUERY_MSK:
+                priv->reply_agg_tx_stats.scd_query++;
+                break;
+        case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
+                priv->reply_agg_tx_stats.bad_crc32++;
+                break;
+        case AGG_TX_STATE_RESPONSE_MSK:
+                priv->reply_agg_tx_stats.response++;
+                break;
+        case AGG_TX_STATE_DUMP_TX_MSK:
+                priv->reply_agg_tx_stats.dump_tx++;
+                break;
+        case AGG_TX_STATE_DELAY_TX_MSK:
+                priv->reply_agg_tx_stats.delay_tx++;
+                break;
+        default:
+                priv->reply_agg_tx_stats.unknown++;
+                break;
+        }
+}
+
+static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
+                                struct iwlagn_tx_resp *tx_resp)
+{
+        struct agg_tx_status *frame_status = &tx_resp->status;
+        int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
+                IWLAGN_TX_RES_TID_POS;
+        int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
+                IWLAGN_TX_RES_RA_POS;
+        struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
+        u32 status = le16_to_cpu(tx_resp->status.status);
+        int i;
+
+        WARN_ON(tid == IWL_TID_NON_QOS);
+
+        if (agg->wait_for_ba)
+                IWL_DEBUG_TX_REPLY(priv,
+                        "got tx response w/o block-ack\n");
+
+        agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
+        agg->wait_for_ba = (tx_resp->frame_count > 1);
+
+        /*
+         * If the BT kill count is non-zero, we'll get this
+         * notification again.
+         */
+        if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
+            priv->cfg->bt_params &&
+            priv->cfg->bt_params->advanced_bt_coexist) {
+                IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
+        }
+
+        if (tx_resp->frame_count == 1)
+                return;
+
+        /* Construct bit-map of pending frames within Tx window */
+        for (i = 0; i < tx_resp->frame_count; i++) {
+                u16 fstatus = le16_to_cpu(frame_status[i].status);
+
+                if (status & AGG_TX_STATUS_MSK)
+                        iwlagn_count_agg_tx_err_status(priv, fstatus);
+
+                if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
+                              AGG_TX_STATE_ABORT_MSK))
+                        continue;
+
+                IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
+                                   "try-count (0x%08x)\n",
+                                   iwl_get_agg_tx_fail_reason(fstatus),
+                                   fstatus & AGG_TX_STATUS_MSK,
+                                   fstatus & AGG_TX_TRY_MSK);
+        }
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+#define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
+
+const char *iwl_get_agg_tx_fail_reason(u16 status)
+{
+        status &= AGG_TX_STATUS_MSK;
+        switch (status) {
+        case AGG_TX_STATE_TRANSMITTED:
+                return "SUCCESS";
+                AGG_TX_STATE_FAIL(UNDERRUN_MSK);
+                AGG_TX_STATE_FAIL(BT_PRIO_MSK);
+                AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
+                AGG_TX_STATE_FAIL(ABORT_MSK);
+                AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
+                AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
+                AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
+                AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
+                AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
+                AGG_TX_STATE_FAIL(RESPONSE_MSK);
+                AGG_TX_STATE_FAIL(DUMP_TX_MSK);
+                AGG_TX_STATE_FAIL(DELAY_TX_MSK);
+        }
+
+        return "UNKNOWN";
+}
+#endif /* CONFIG_IWLWIFI_DEBUG */
+
+static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
+{
+        return le32_to_cpup((__le32 *)&tx_resp->status +
+                            tx_resp->frame_count) & MAX_SN;
+}
+
+static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
+{
+        status &= TX_STATUS_MSK;
+
+        switch (status) {
+        case TX_STATUS_POSTPONE_DELAY:
+                priv->reply_tx_stats.pp_delay++;
+                break;
+        case TX_STATUS_POSTPONE_FEW_BYTES:
+                priv->reply_tx_stats.pp_few_bytes++;
+                break;
+        case TX_STATUS_POSTPONE_BT_PRIO:
+                priv->reply_tx_stats.pp_bt_prio++;
+                break;
+        case TX_STATUS_POSTPONE_QUIET_PERIOD:
+                priv->reply_tx_stats.pp_quiet_period++;
+                break;
+        case TX_STATUS_POSTPONE_CALC_TTAK:
+                priv->reply_tx_stats.pp_calc_ttak++;
+                break;
+        case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
+                priv->reply_tx_stats.int_crossed_retry++;
+                break;
+        case TX_STATUS_FAIL_SHORT_LIMIT:
+                priv->reply_tx_stats.short_limit++;
+                break;
+        case TX_STATUS_FAIL_LONG_LIMIT:
+                priv->reply_tx_stats.long_limit++;
+                break;
+        case TX_STATUS_FAIL_FIFO_UNDERRUN:
+                priv->reply_tx_stats.fifo_underrun++;
+                break;
+        case TX_STATUS_FAIL_DRAIN_FLOW:
+                priv->reply_tx_stats.drain_flow++;
+                break;
+        case TX_STATUS_FAIL_RFKILL_FLUSH:
+                priv->reply_tx_stats.rfkill_flush++;
+                break;
+        case TX_STATUS_FAIL_LIFE_EXPIRE:
+                priv->reply_tx_stats.life_expire++;
+                break;
+        case TX_STATUS_FAIL_DEST_PS:
+                priv->reply_tx_stats.dest_ps++;
+                break;
+        case TX_STATUS_FAIL_HOST_ABORTED:
+                priv->reply_tx_stats.host_abort++;
+                break;
+        case TX_STATUS_FAIL_BT_RETRY:
+                priv->reply_tx_stats.bt_retry++;
+                break;
+        case TX_STATUS_FAIL_STA_INVALID:
+                priv->reply_tx_stats.sta_invalid++;
+                break;
+        case TX_STATUS_FAIL_FRAG_DROPPED:
+                priv->reply_tx_stats.frag_drop++;
+                break;
+        case TX_STATUS_FAIL_TID_DISABLE:
+                priv->reply_tx_stats.tid_disable++;
+                break;
+        case TX_STATUS_FAIL_FIFO_FLUSHED:
+                priv->reply_tx_stats.fifo_flush++;
+                break;
+        case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
+                priv->reply_tx_stats.insuff_cf_poll++;
+                break;
+        case TX_STATUS_FAIL_PASSIVE_NO_RX:
+                priv->reply_tx_stats.fail_hw_drop++;
+                break;
+        case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
+                priv->reply_tx_stats.sta_color_mismatch++;
+                break;
+        default:
+                priv->reply_tx_stats.unknown++;
+                break;
+        }
+}
+
+static void iwlagn_set_tx_status(struct iwl_priv *priv,
+                                 struct ieee80211_tx_info *info,
+                                 struct iwlagn_tx_resp *tx_resp,
+                                 bool is_agg)
+{
+        u16  status = le16_to_cpu(tx_resp->status.status);
+
+        info->status.rates[0].count = tx_resp->failure_frame + 1;
+        if (is_agg)
+                info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+        info->flags |= iwl_tx_status_to_mac80211(status);
+        iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
+                                    info);
+        if (!iwl_is_tx_success(status))
+                iwlagn_count_tx_err_status(priv, status);
+}
+
+static void iwl_check_abort_status(struct iwl_priv *priv,
+                            u8 frame_count, u32 status)
+{
+        if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
+                IWL_ERR(priv, "Tx flush command to flush out all frames\n");
+                if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
+                        queue_work(priv->workqueue, &priv->tx_flush);
+        }
+}
+
+static int iwl_reclaim(struct iwl_priv *priv, int sta_id, int tid,
+                       int txq_id, int ssn, struct sk_buff_head *skbs)
+{
+        if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
+                     tid != IWL_TID_NON_QOS &&
+                     txq_id != priv->tid_data[sta_id][tid].agg.txq_id)) {
+                /*
+                 * FIXME: this is a uCode bug which need to be addressed,
+                 * log the information and return for now.
+                 * Since it is can possibly happen very often and in order
+                 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
+                 */
+                IWL_DEBUG_TX_QUEUES(priv,
+                        "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
+                        txq_id, sta_id, tid,
+                        priv->tid_data[sta_id][tid].agg.txq_id);
+                return 1;
+        }
+
+        iwl_trans_reclaim(priv->trans, txq_id, ssn, skbs);
+        return 0;
+}
+
+int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
+                               struct iwl_device_cmd *cmd)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        u16 sequence = le16_to_cpu(pkt->hdr.sequence);
+        int txq_id = SEQ_TO_QUEUE(sequence);
+        int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
+        struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
+        struct ieee80211_hdr *hdr;
+        u32 status = le16_to_cpu(tx_resp->status.status);
+        u16 ssn = iwlagn_get_scd_ssn(tx_resp);
+        int tid;
+        int sta_id;
+        int freed;
+        struct ieee80211_tx_info *info;
+        struct sk_buff_head skbs;
+        struct sk_buff *skb;
+        struct iwl_rxon_context *ctx;
+        bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
+        bool is_offchannel_skb;
+
+        tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
+                IWLAGN_TX_RES_TID_POS;
+        sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
+                IWLAGN_TX_RES_RA_POS;
+
+        spin_lock(&priv->sta_lock);
+
+        if (is_agg)
+                iwl_rx_reply_tx_agg(priv, tx_resp);
+
+        __skb_queue_head_init(&skbs);
+
+        is_offchannel_skb = false;
+
+        if (tx_resp->frame_count == 1) {
+                u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
+                next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
+
+                if (is_agg) {
+                        /* If this is an aggregation queue, we can rely on the
+                         * ssn since the wifi sequence number corresponds to
+                         * the index in the TFD ring (%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.
+                         */
+                        next_reclaimed = ssn;
+                }
+
+                if (tid != IWL_TID_NON_QOS) {
+                        priv->tid_data[sta_id][tid].next_reclaimed =
+                                next_reclaimed;
+                        IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
+                                                  next_reclaimed);
+                }
+
+                /*we can free until ssn % q.n_bd not inclusive */
+                WARN_ON_ONCE(iwl_reclaim(priv, sta_id, tid,
+                                         txq_id, ssn, &skbs));
+                iwlagn_check_ratid_empty(priv, sta_id, tid);
+                freed = 0;
+
+                /* process frames */
+                skb_queue_walk(&skbs, skb) {
+                        hdr = (struct ieee80211_hdr *)skb->data;
+
+                        if (!ieee80211_is_data_qos(hdr->frame_control))
+                                priv->last_seq_ctl = tx_resp->seq_ctl;
+
+                        info = IEEE80211_SKB_CB(skb);
+                        ctx = info->driver_data[0];
+                        iwl_trans_free_tx_cmd(priv->trans,
+                                              info->driver_data[1]);
+
+                        memset(&info->status, 0, sizeof(info->status));
+
+                        if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
+                            iwl_is_associated_ctx(ctx) && ctx->vif &&
+                            ctx->vif->type == NL80211_IFTYPE_STATION) {
+                                /* block and stop all queues */
+                                priv->passive_no_rx = true;
+                                IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
+                                                    "passive channel");
+                                ieee80211_stop_queues(priv->hw);
+
+                                IWL_DEBUG_TX_REPLY(priv,
+                                           "TXQ %d status %s (0x%08x) "
+                                           "rate_n_flags 0x%x retries %d\n",
+                                           txq_id,
+                                           iwl_get_tx_fail_reason(status),
+                                           status,
+                                           le32_to_cpu(tx_resp->rate_n_flags),
+                                           tx_resp->failure_frame);
+
+                                IWL_DEBUG_TX_REPLY(priv,
+                                           "FrameCnt = %d, idx=%d\n",
+                                           tx_resp->frame_count, cmd_index);
+                        }
+
+                        /* check if BAR is needed */
+                        if (is_agg && !iwl_is_tx_success(status))
+                                info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
+                        iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
+                                     tx_resp, is_agg);
+                        if (!is_agg)
+                                iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
+
+                        is_offchannel_skb =
+                                (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
+                        freed++;
+                }
+
+                WARN_ON(!is_agg && freed != 1);
+
+                /*
+                 * An offchannel frame can be send only on the AUX queue, where
+                 * there is no aggregation (and reordering) so it only is single
+                 * skb is expected to be processed.
+                 */
+                WARN_ON(is_offchannel_skb && freed != 1);
+        }
+
+        iwl_check_abort_status(priv, tx_resp->frame_count, status);
+        spin_unlock(&priv->sta_lock);
+
+        while (!skb_queue_empty(&skbs)) {
+                skb = __skb_dequeue(&skbs);
+                ieee80211_tx_status(priv->hw, skb);
+        }
+
+        if (is_offchannel_skb)
+                iwl_scan_offchannel_skb_status(priv);
+
+        return 0;
+}
+
+/**
+ * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
+ *
+ * Handles block-acknowledge notification from device, which reports success
+ * of frames sent via aggregation.
+ */
+int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
+                                   struct iwl_rx_cmd_buffer *rxb,
+                                   struct iwl_device_cmd *cmd)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
+        struct iwl_ht_agg *agg;
+        struct sk_buff_head reclaimed_skbs;
+        struct ieee80211_tx_info *info;
+        struct ieee80211_hdr *hdr;
+        struct sk_buff *skb;
+        int sta_id;
+        int tid;
+        int freed;
+
+        /* "flow" corresponds to Tx queue */
+        u16 scd_flow = le16_to_cpu(ba_resp->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 */
+        u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
+
+        if (scd_flow >= priv->cfg->base_params->num_of_queues) {
+                IWL_ERR(priv,
+                        "BUG_ON scd_flow is bigger than number of queues\n");
+                return 0;
+        }
+
+        sta_id = ba_resp->sta_id;
+        tid = ba_resp->tid;
+        agg = &priv->tid_data[sta_id][tid].agg;
+
+        spin_lock(&priv->sta_lock);
+
+        if (unlikely(!agg->wait_for_ba)) {
+                if (unlikely(ba_resp->bitmap))
+                        IWL_ERR(priv, "Received BA when not expected\n");
+                spin_unlock(&priv->sta_lock);
+                return 0;
+        }
+
+        __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). */
+        if (iwl_reclaim(priv, sta_id, tid, scd_flow,
+                        ba_resp_scd_ssn, &reclaimed_skbs)) {
+                spin_unlock(&priv->sta_lock);
+                return 0;
+        }
+
+        IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
+                           "sta_id = %d\n",
+                           agg->wait_for_ba,
+                           (u8 *) &ba_resp->sta_addr_lo32,
+                           ba_resp->sta_id);
+        IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
+                           "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
+                           ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
+                           (unsigned long long)le64_to_cpu(ba_resp->bitmap),
+                           scd_flow, ba_resp_scd_ssn, ba_resp->txed,
+                           ba_resp->txed_2_done);
+
+        /* Mark that the expected block-ack response arrived */
+        agg->wait_for_ba = false;
+
+        /* Sanity check values reported by uCode */
+        if (ba_resp->txed_2_done > ba_resp->txed) {
+                IWL_DEBUG_TX_REPLY(priv,
+                        "bogus sent(%d) and ack(%d) count\n",
+                        ba_resp->txed, ba_resp->txed_2_done);
+                /*
+                 * set txed_2_done = txed,
+                 * so it won't impact rate scale
+                 */
+                ba_resp->txed = ba_resp->txed_2_done;
+        }
+
+        priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
+
+        iwlagn_check_ratid_empty(priv, sta_id, tid);
+        freed = 0;
+
+        skb_queue_walk(&reclaimed_skbs, skb) {
+                hdr = (struct ieee80211_hdr *)skb->data;
+
+                if (ieee80211_is_data_qos(hdr->frame_control))
+                        freed++;
+                else
+                        WARN_ON_ONCE(1);
+
+                info = IEEE80211_SKB_CB(skb);
+                iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
+
+                if (freed == 1) {
+                        /* this is the first skb we deliver in this batch */
+                        /* put the rate scaling data there */
+                        info = IEEE80211_SKB_CB(skb);
+                        memset(&info->status, 0, sizeof(info->status));
+                        info->flags |= IEEE80211_TX_STAT_ACK;
+                        info->flags |= IEEE80211_TX_STAT_AMPDU;
+                        info->status.ampdu_ack_len = ba_resp->txed_2_done;
+                        info->status.ampdu_len = ba_resp->txed;
+                        iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
+                                                    info);
+                }
+        }
+
+        spin_unlock(&priv->sta_lock);
+
+        while (!skb_queue_empty(&reclaimed_skbs)) {
+                skb = __skb_dequeue(&reclaimed_skbs);
+                ieee80211_tx_status(priv->hw, skb);
+        }
+
+        return 0;
+}