drivers/net/wireless/intel/iwlwifi/dvm/tx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
   5  * Copyright (C) 2019 Intel Corporation
   6  * Copyright (C) 2023 Intel Corporation
   7  *****************************************************************************/
   8
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/sched.h>
  12 #include <linux/ieee80211.h>
  13 #include "iwl-io.h"
  14 #include "iwl-trans.h"
  15 #include "iwl-agn-hw.h"
  16 #include "dev.h"
  17 #include "agn.h"
  18
  19 static const u8 tid_to_ac[] = {
  20         IEEE80211_AC_BE,
  21         IEEE80211_AC_BK,
  22         IEEE80211_AC_BK,
  23         IEEE80211_AC_BE,
  24         IEEE80211_AC_VI,
  25         IEEE80211_AC_VI,
  26         IEEE80211_AC_VO,
  27         IEEE80211_AC_VO,
  28 };
  29
  30 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
  31                                      struct ieee80211_tx_info *info,
  32                                      __le16 fc, __le32 *tx_flags)
  33 {
  34         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
  35             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
  36             info->flags & IEEE80211_TX_CTL_AMPDU)
  37                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
  38 }
  39
  40 /*
  41  * handle build REPLY_TX command notification.
  42  */
  43 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
  44                                       struct sk_buff *skb,
  45                                       struct iwl_tx_cmd *tx_cmd,
  46                                       struct ieee80211_tx_info *info,
  47                                       struct ieee80211_hdr *hdr, u8 sta_id)
  48 {
  49         __le16 fc = hdr->frame_control;
  50         __le32 tx_flags = tx_cmd->tx_flags;
  51
  52         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
  53
  54         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  55                 tx_flags |= TX_CMD_FLG_ACK_MSK;
  56         else
  57                 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
  58
  59         if (ieee80211_is_probe_resp(fc))
  60                 tx_flags |= TX_CMD_FLG_TSF_MSK;
  61         else if (ieee80211_is_back_req(fc))
  62                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
  63         else if (info->band == NL80211_BAND_2GHZ &&
  64                  priv->lib->bt_params &&
  65                  priv->lib->bt_params->advanced_bt_coexist &&
  66                  (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
  67                  ieee80211_is_reassoc_req(fc) ||
  68                  info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
  69                 tx_flags |= TX_CMD_FLG_IGNORE_BT;
  70
  71
  72         tx_cmd->sta_id = sta_id;
  73         if (ieee80211_has_morefrags(fc))
  74                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
  75
  76         if (ieee80211_is_data_qos(fc)) {
  77                 u8 *qc = ieee80211_get_qos_ctl(hdr);
  78                 tx_cmd->tid_tspec = qc[0] & 0xf;
  79                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  80         } else {
  81                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
  82                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
  83                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
  84                 else
  85                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  86         }
  87
  88         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
  89
  90         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
  91         if (ieee80211_is_mgmt(fc)) {
  92                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
  93                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
  94                 else
  95                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
  96         } else {
  97                 tx_cmd->timeout.pm_frame_timeout = 0;
  98         }
  99
 100         tx_cmd->driver_txop = 0;
 101         tx_cmd->tx_flags = tx_flags;
 102         tx_cmd->next_frame_len = 0;
 103 }
 104
 105 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 106                                      struct iwl_tx_cmd *tx_cmd,
 107                                      struct ieee80211_tx_info *info,
 108                                      struct ieee80211_sta *sta,
 109                                      __le16 fc)
 110 {
 111         u32 rate_flags;
 112         int rate_idx;
 113         u8 rts_retry_limit;
 114         u8 data_retry_limit;
 115         u8 rate_plcp;
 116
 117         if (priv->wowlan) {
 118                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 119                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 120         } else {
 121                 /* Set retry limit on RTS packets */
 122                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 123
 124                 /* Set retry limit on DATA packets and Probe Responses*/
 125                 if (ieee80211_is_probe_resp(fc)) {
 126                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 127                         rts_retry_limit =
 128                                 min(data_retry_limit, rts_retry_limit);
 129                 } else if (ieee80211_is_back_req(fc))
 130                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 131                 else
 132                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 133         }
 134
 135         tx_cmd->data_retry_limit = data_retry_limit;
 136         tx_cmd->rts_retry_limit = rts_retry_limit;
 137
 138         /* DATA packets will use the uCode station table for rate/antenna
 139          * selection */
 140         if (ieee80211_is_data(fc)) {
 141                 tx_cmd->initial_rate_index = 0;
 142                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 143                 return;
 144         } else if (ieee80211_is_back_req(fc))
 145                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 146
 147         /**
 148          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 149          * not really a TX rate.  Thus, we use the lowest supported rate for
 150          * this band.  Also use the lowest supported rate if the stored rate
 151          * index is invalid.
 152          */
 153         rate_idx = info->control.rates[0].idx;
 154         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 155                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 156                 rate_idx = rate_lowest_index(
 157                                 &priv->nvm_data->bands[info->band], sta);
 158         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 159         if (info->band == NL80211_BAND_5GHZ)
 160                 rate_idx += IWL_FIRST_OFDM_RATE;
 161         /* Get PLCP rate for tx_cmd->rate_n_flags */
 162         rate_plcp = iwl_rates[rate_idx].plcp;
 163         /* Zero out flags for this packet */
 164         rate_flags = 0;
 165
 166         /* Set CCK flag as needed */
 167         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 168                 rate_flags |= RATE_MCS_CCK_MSK;
 169
 170         /* Set up antennas */
 171         if (priv->lib->bt_params &&
 172             priv->lib->bt_params->advanced_bt_coexist &&
 173             priv->bt_full_concurrent) {
 174                 /* operated as 1x1 in full concurrency mode */
 175                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 176                                 first_antenna(priv->nvm_data->valid_tx_ant));
 177         } else
 178                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
 179                                         priv, priv->mgmt_tx_ant,
 180                                         priv->nvm_data->valid_tx_ant);
 181         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 182
 183         /* Set the rate in the TX cmd */
 184         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 185 }
 186
 187 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 188                                          struct ieee80211_tx_info *info,
 189                                          struct iwl_tx_cmd *tx_cmd,
 190                                          struct sk_buff *skb_frag)
 191 {
 192         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 193
 194         switch (keyconf->cipher) {
 195         case WLAN_CIPHER_SUITE_CCMP:
 196                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 197                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 198                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 199                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 200                 break;
 201
 202         case WLAN_CIPHER_SUITE_TKIP:
 203                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 204                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 205                 break;
 206
 207         case WLAN_CIPHER_SUITE_WEP104:
 208                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 209                 fallthrough;
 210         case WLAN_CIPHER_SUITE_WEP40:
 211                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 212                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 213
 214                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 215
 216                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 217                              "with key %d\n", keyconf->keyidx);
 218                 break;
 219
 220         default:
 221                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 222                 break;
 223         }
 224 }
 225
 226 /**
 227  * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
 228  * @context: the current context
 229  * @sta: mac80211 station
 230  *
 231  * In certain circumstances mac80211 passes a station pointer
 232  * that may be %NULL, for example during TX or key setup. In
 233  * that case, we need to use the broadcast station, so this
 234  * inline wraps that pattern.
 235  */
 236 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
 237                                    struct ieee80211_sta *sta)
 238 {
 239         int sta_id;
 240
 241         if (!sta)
 242                 return context->bcast_sta_id;
 243
 244         sta_id = iwl_sta_id(sta);
 245
 246         /*
 247          * mac80211 should not be passing a partially
 248          * initialised station!
 249          */
 250         WARN_ON(sta_id == IWL_INVALID_STATION);
 251
 252         return sta_id;
 253 }
 254
 255 /*
 256  * start REPLY_TX command process
 257  */
 258 int iwlagn_tx_skb(struct iwl_priv *priv,
 259                   struct ieee80211_sta *sta,
 260                   struct sk_buff *skb)
 261 {
 262         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 263         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 264         struct iwl_station_priv *sta_priv = NULL;
 265         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 266         struct iwl_device_tx_cmd *dev_cmd;
 267         struct iwl_tx_cmd *tx_cmd;
 268         __le16 fc;
 269         u8 hdr_len;
 270         u16 len, seq_number = 0;
 271         u8 sta_id, tid = IWL_MAX_TID_COUNT;
 272         bool is_agg = false, is_data_qos = false;
 273         int txq_id;
 274
 275         if (info->control.vif)
 276                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 277
 278         if (iwl_is_rfkill(priv)) {
 279                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 280                 goto drop_unlock_priv;
 281         }
 282
 283         fc = hdr->frame_control;
 284
 285 #ifdef CONFIG_IWLWIFI_DEBUG
 286         if (ieee80211_is_auth(fc))
 287                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 288         else if (ieee80211_is_assoc_req(fc))
 289                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 290         else if (ieee80211_is_reassoc_req(fc))
 291                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 292 #endif
 293
 294         if (unlikely(ieee80211_is_probe_resp(fc))) {
 295                 struct iwl_wipan_noa_data *noa_data =
 296                         rcu_dereference(priv->noa_data);
 297
 298                 if (noa_data &&
 299                     pskb_expand_head(skb, 0, noa_data->length,
 300                                      GFP_ATOMIC) == 0) {
 301                         skb_put_data(skb, noa_data->data, noa_data->length);
 302                         hdr = (struct ieee80211_hdr *)skb->data;
 303                 }
 304         }
 305
 306         hdr_len = ieee80211_hdrlen(fc);
 307
 308         /* For management frames use broadcast id to do not break aggregation */
 309         if (!ieee80211_is_data(fc))
 310                 sta_id = ctx->bcast_sta_id;
 311         else {
 312                 /* Find index into station table for destination station */
 313                 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
 314                 if (sta_id == IWL_INVALID_STATION) {
 315                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 316                                        hdr->addr1);
 317                         goto drop_unlock_priv;
 318                 }
 319         }
 320
 321         if (sta)
 322                 sta_priv = (void *)sta->drv_priv;
 323
 324         if (sta_priv && sta_priv->asleep &&
 325             (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
 326                 /*
 327                  * This sends an asynchronous command to the device,
 328                  * but we can rely on it being processed before the
 329                  * next frame is processed -- and the next frame to
 330                  * this station is the one that will consume this
 331                  * counter.
 332                  * For now set the counter to just 1 since we do not
 333                  * support uAPSD yet.
 334                  *
 335                  * FIXME: If we get two non-bufferable frames one
 336                  * after the other, we might only send out one of
 337                  * them because this is racy.
 338                  */
 339                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 340         }
 341
 342         dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
 343
 344         if (unlikely(!dev_cmd))
 345                 goto drop_unlock_priv;
 346
 347         dev_cmd->hdr.cmd = REPLY_TX;
 348         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 349
 350         /* Total # bytes to be transmitted */
 351         len = (u16)skb->len;
 352         tx_cmd->len = cpu_to_le16(len);
 353
 354         if (info->control.hw_key)
 355                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
 356
 357         /* TODO need this for burst mode later on */
 358         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 359
 360         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
 361
 362         memset(&info->status, 0, sizeof(info->status));
 363         memset(info->driver_data, 0, sizeof(info->driver_data));
 364
 365         info->driver_data[0] = ctx;
 366         info->driver_data[1] = dev_cmd;
 367         /* From now on, we cannot access info->control */
 368
 369         spin_lock(&priv->sta_lock);
 370
 371         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
 372                 u8 *qc = NULL;
 373                 struct iwl_tid_data *tid_data;
 374                 qc = ieee80211_get_qos_ctl(hdr);
 375                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 376                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 377                         goto drop_unlock_sta;
 378                 tid_data = &priv->tid_data[sta_id][tid];
 379
 380                 /* aggregation is on for this <sta,tid> */
 381                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 382                     tid_data->agg.state != IWL_AGG_ON) {
 383                         IWL_ERR(priv,
 384                                 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
 385                                 info->flags, tid_data->agg.state);
 386                         IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
 387                                 sta_id, tid,
 388                                 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
 389                         goto drop_unlock_sta;
 390                 }
 391
 392                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 393                  * only. Check this here.
 394                  */
 395                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 396                               tid_data->agg.state != IWL_AGG_OFF,
 397                               "Tx while agg.state = %d\n", tid_data->agg.state))
 398                         goto drop_unlock_sta;
 399
 400                 seq_number = tid_data->seq_number;
 401                 seq_number &= IEEE80211_SCTL_SEQ;
 402                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 403                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 404                 seq_number += 0x10;
 405
 406                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 407                         is_agg = true;
 408                 is_data_qos = true;
 409         }
 410
 411         /* Copy MAC header from skb into command buffer */
 412         memcpy(tx_cmd->hdr, hdr, hdr_len);
 413
 414         txq_id = info->hw_queue;
 415
 416         if (is_agg)
 417                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 418         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 419                 /*
 420                  * The microcode will clear the more data
 421                  * bit in the last frame it transmits.
 422                  */
 423                 hdr->frame_control |=
 424                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 425         }
 426
 427         WARN_ON_ONCE(is_agg &&
 428                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 429
 430         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 431                      txq_id, seq_number);
 432
 433         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 434                 goto drop_unlock_sta;
 435
 436         if (is_data_qos && !ieee80211_has_morefrags(fc))
 437                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 438
 439         spin_unlock(&priv->sta_lock);
 440
 441         /*
 442          * Avoid atomic ops if it isn't an associated client.
 443          * Also, if this is a packet for aggregation, don't
 444          * increase the counter because the ucode will stop
 445          * aggregation queues when their respective station
 446          * goes to sleep.
 447          */
 448         if (sta_priv && sta_priv->client && !is_agg)
 449                 atomic_inc(&sta_priv->pending_frames);
 450
 451         return 0;
 452
 453 drop_unlock_sta:
 454         if (dev_cmd)
 455                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 456         spin_unlock(&priv->sta_lock);
 457 drop_unlock_priv:
 458         return -1;
 459 }
 460
 461 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 462 {
 463         int q;
 464
 465         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 466              q < priv->trans->trans_cfg->base_params->num_of_queues; q++) {
 467                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 468                         priv->queue_to_mac80211[q] = mq;
 469                         return q;
 470                 }
 471         }
 472
 473         return -ENOSPC;
 474 }
 475
 476 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 477 {
 478         clear_bit(q, priv->agg_q_alloc);
 479         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 480 }
 481
 482 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 483                         struct ieee80211_sta *sta, u16 tid)
 484 {
 485         struct iwl_tid_data *tid_data;
 486         int sta_id, txq_id;
 487         enum iwl_agg_state agg_state;
 488
 489         sta_id = iwl_sta_id(sta);
 490
 491         if (sta_id == IWL_INVALID_STATION) {
 492                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 493                 return -ENXIO;
 494         }
 495
 496         spin_lock_bh(&priv->sta_lock);
 497
 498         tid_data = &priv->tid_data[sta_id][tid];
 499         txq_id = tid_data->agg.txq_id;
 500
 501         switch (tid_data->agg.state) {
 502         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 503                 /*
 504                 * This can happen if the peer stops aggregation
 505                 * again before we've had a chance to drain the
 506                 * queue we selected previously, i.e. before the
 507                 * session was really started completely.
 508                 */
 509                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 510                 goto turn_off;
 511         case IWL_AGG_STARTING:
 512                 /*
 513                  * This can happen when the session is stopped before
 514                  * we receive ADDBA response
 515                  */
 516                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 517                 goto turn_off;
 518         case IWL_AGG_ON:
 519                 break;
 520         default:
 521                 IWL_WARN(priv,
 522                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 523                          sta_id, tid, tid_data->agg.state);
 524                 spin_unlock_bh(&priv->sta_lock);
 525                 return 0;
 526         }
 527
 528         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 529
 530         /* There are still packets for this RA / TID in the HW */
 531         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 532                 IWL_DEBUG_TX_QUEUES(priv,
 533                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 534                         sta_id, tid, txq_id);
 535         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 536                 IWL_DEBUG_TX_QUEUES(priv,
 537                                     "Can't proceed: ssn %d, next_recl = %d\n",
 538                                     tid_data->agg.ssn,
 539                                     tid_data->next_reclaimed);
 540                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 541                 spin_unlock_bh(&priv->sta_lock);
 542                 return 0;
 543         }
 544
 545         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 546                             tid_data->agg.ssn);
 547 turn_off:
 548         agg_state = tid_data->agg.state;
 549         tid_data->agg.state = IWL_AGG_OFF;
 550
 551         spin_unlock_bh(&priv->sta_lock);
 552
 553         if (test_bit(txq_id, priv->agg_q_alloc)) {
 554                 /*
 555                  * If the transport didn't know that we wanted to start
 556                  * agreggation, don't tell it that we want to stop them.
 557                  * This can happen when we don't get the addBA response on
 558                  * time, or we hadn't time to drain the AC queues.
 559                  */
 560                 if (agg_state == IWL_AGG_ON)
 561                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 562                 else
 563                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 564                                             agg_state);
 565                 iwlagn_dealloc_agg_txq(priv, txq_id);
 566         }
 567
 568         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 569
 570         return 0;
 571 }
 572
 573 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 574                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 575 {
 576         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 577         struct iwl_tid_data *tid_data;
 578         int sta_id, txq_id, ret;
 579
 580         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 581                      sta->addr, tid);
 582
 583         sta_id = iwl_sta_id(sta);
 584         if (sta_id == IWL_INVALID_STATION) {
 585                 IWL_ERR(priv, "Start AGG on invalid station\n");
 586                 return -ENXIO;
 587         }
 588         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 589                 return -EINVAL;
 590
 591         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 592                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 593                 return -ENXIO;
 594         }
 595
 596         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 597         if (txq_id < 0) {
 598                 IWL_DEBUG_TX_QUEUES(priv,
 599                         "No free aggregation queue for %pM/%d\n",
 600                         sta->addr, tid);
 601                 return txq_id;
 602         }
 603
 604         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 605         if (ret)
 606                 return ret;
 607
 608         spin_lock_bh(&priv->sta_lock);
 609         tid_data = &priv->tid_data[sta_id][tid];
 610         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 611         tid_data->agg.txq_id = txq_id;
 612
 613         *ssn = tid_data->agg.ssn;
 614
 615         if (*ssn == tid_data->next_reclaimed) {
 616                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 617                                     tid_data->agg.ssn);
 618                 tid_data->agg.state = IWL_AGG_STARTING;
 619                 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
 620         } else {
 621                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 622                                     "next_reclaimed = %d\n",
 623                                     tid_data->agg.ssn,
 624                                     tid_data->next_reclaimed);
 625                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 626         }
 627         spin_unlock_bh(&priv->sta_lock);
 628
 629         return ret;
 630 }
 631
 632 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
 633                         struct ieee80211_sta *sta, u16 tid)
 634 {
 635         struct iwl_tid_data *tid_data;
 636         enum iwl_agg_state agg_state;
 637         int sta_id, txq_id;
 638         sta_id = iwl_sta_id(sta);
 639
 640         /*
 641          * First set the agg state to OFF to avoid calling
 642          * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
 643          */
 644         spin_lock_bh(&priv->sta_lock);
 645
 646         tid_data = &priv->tid_data[sta_id][tid];
 647         txq_id = tid_data->agg.txq_id;
 648         agg_state = tid_data->agg.state;
 649         IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
 650                             sta_id, tid, txq_id, tid_data->agg.state);
 651
 652         tid_data->agg.state = IWL_AGG_OFF;
 653
 654         spin_unlock_bh(&priv->sta_lock);
 655
 656         if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
 657                 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
 658
 659         if (test_bit(txq_id, priv->agg_q_alloc)) {
 660                 /*
 661                  * If the transport didn't know that we wanted to start
 662                  * agreggation, don't tell it that we want to stop them.
 663                  * This can happen when we don't get the addBA response on
 664                  * time, or we hadn't time to drain the AC queues.
 665                  */
 666                 if (agg_state == IWL_AGG_ON)
 667                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 668                 else
 669                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 670                                             agg_state);
 671                 iwlagn_dealloc_agg_txq(priv, txq_id);
 672         }
 673
 674         return 0;
 675 }
 676
 677 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 678                         struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 679 {
 680         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 681         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 682         int q, fifo;
 683         u16 ssn;
 684
 685         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 686
 687         spin_lock_bh(&priv->sta_lock);
 688         ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
 689         q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
 690         priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
 691         spin_unlock_bh(&priv->sta_lock);
 692
 693         fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
 694
 695         iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
 696                              buf_size, ssn, 0);
 697
 698         /*
 699          * If the limit is 0, then it wasn't initialised yet,
 700          * use the default. We can do that since we take the
 701          * minimum below, and we don't want to go above our
 702          * default due to hardware restrictions.
 703          */
 704         if (sta_priv->max_agg_bufsize == 0)
 705                 sta_priv->max_agg_bufsize =
 706                         LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 707
 708         /*
 709          * Even though in theory the peer could have different
 710          * aggregation reorder buffer sizes for different sessions,
 711          * our ucode doesn't allow for that and has a global limit
 712          * for each station. Therefore, use the minimum of all the
 713          * aggregation sessions and our default value.
 714          */
 715         sta_priv->max_agg_bufsize =
 716                 min(sta_priv->max_agg_bufsize, buf_size);
 717
 718         if (priv->hw_params.use_rts_for_aggregation) {
 719                 /*
 720                  * switch to RTS/CTS if it is the prefer protection
 721                  * method for HT traffic
 722                  */
 723
 724                 sta_priv->lq_sta.lq.general_params.flags |=
 725                         LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 726         }
 727         priv->agg_tids_count++;
 728         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 729                      priv->agg_tids_count);
 730
 731         sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 732                 sta_priv->max_agg_bufsize;
 733
 734         IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 735                  sta->addr, tid);
 736
 737         return iwl_send_lq_cmd(priv, ctx,
 738                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 739 }
 740
 741 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
 742 {
 743         struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
 744         enum iwl_rxon_context_id ctx;
 745         struct ieee80211_vif *vif;
 746         u8 *addr;
 747
 748         lockdep_assert_held(&priv->sta_lock);
 749
 750         addr = priv->stations[sta_id].sta.sta.addr;
 751         ctx = priv->stations[sta_id].ctxid;
 752         vif = priv->contexts[ctx].vif;
 753
 754         switch (priv->tid_data[sta_id][tid].agg.state) {
 755         case IWL_EMPTYING_HW_QUEUE_DELBA:
 756                 /* There are no packets for this RA / TID in the HW any more */
 757                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 758                         IWL_DEBUG_TX_QUEUES(priv,
 759                                 "Can continue DELBA flow ssn = next_recl = %d\n",
 760                                 tid_data->next_reclaimed);
 761                         iwl_trans_txq_disable(priv->trans,
 762                                               tid_data->agg.txq_id, true);
 763                         iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
 764                         tid_data->agg.state = IWL_AGG_OFF;
 765                         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 766                 }
 767                 break;
 768         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 769                 /* There are no packets for this RA / TID in the HW any more */
 770                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 771                         IWL_DEBUG_TX_QUEUES(priv,
 772                                 "Can continue ADDBA flow ssn = next_recl = %d\n",
 773                                 tid_data->next_reclaimed);
 774                         tid_data->agg.state = IWL_AGG_STARTING;
 775                         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
 776                 }
 777                 break;
 778         default:
 779                 break;
 780         }
 781 }
 782
 783 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 784                                      struct iwl_rxon_context *ctx,
 785                                      const u8 *addr1)
 786 {
 787         struct ieee80211_sta *sta;
 788         struct iwl_station_priv *sta_priv;
 789
 790         rcu_read_lock();
 791         sta = ieee80211_find_sta(ctx->vif, addr1);
 792         if (sta) {
 793                 sta_priv = (void *)sta->drv_priv;
 794                 /* avoid atomic ops if this isn't a client */
 795                 if (sta_priv->client &&
 796                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 797                         ieee80211_sta_block_awake(priv->hw, sta, false);
 798         }
 799         rcu_read_unlock();
 800 }
 801
 802 /*
 803  * translate ucode response to mac80211 tx status control values
 804  */
 805 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 806                                   struct ieee80211_tx_info *info)
 807 {
 808         struct ieee80211_tx_rate *r = &info->status.rates[0];
 809
 810         info->status.antenna =
 811                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 812         if (rate_n_flags & RATE_MCS_HT_MSK)
 813                 r->flags |= IEEE80211_TX_RC_MCS;
 814         if (rate_n_flags & RATE_MCS_GF_MSK)
 815                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 816         if (rate_n_flags & RATE_MCS_HT40_MSK)
 817                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 818         if (rate_n_flags & RATE_MCS_DUP_MSK)
 819                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 820         if (rate_n_flags & RATE_MCS_SGI_MSK)
 821                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 822         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 823 }
 824
 825 #ifdef CONFIG_IWLWIFI_DEBUG
 826 const char *iwl_get_tx_fail_reason(u32 status)
 827 {
 828 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 829 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 830
 831         switch (status & TX_STATUS_MSK) {
 832         case TX_STATUS_SUCCESS:
 833                 return "SUCCESS";
 834         TX_STATUS_POSTPONE(DELAY);
 835         TX_STATUS_POSTPONE(FEW_BYTES);
 836         TX_STATUS_POSTPONE(BT_PRIO);
 837         TX_STATUS_POSTPONE(QUIET_PERIOD);
 838         TX_STATUS_POSTPONE(CALC_TTAK);
 839         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 840         TX_STATUS_FAIL(SHORT_LIMIT);
 841         TX_STATUS_FAIL(LONG_LIMIT);
 842         TX_STATUS_FAIL(FIFO_UNDERRUN);
 843         TX_STATUS_FAIL(DRAIN_FLOW);
 844         TX_STATUS_FAIL(RFKILL_FLUSH);
 845         TX_STATUS_FAIL(LIFE_EXPIRE);
 846         TX_STATUS_FAIL(DEST_PS);
 847         TX_STATUS_FAIL(HOST_ABORTED);
 848         TX_STATUS_FAIL(BT_RETRY);
 849         TX_STATUS_FAIL(STA_INVALID);
 850         TX_STATUS_FAIL(FRAG_DROPPED);
 851         TX_STATUS_FAIL(TID_DISABLE);
 852         TX_STATUS_FAIL(FIFO_FLUSHED);
 853         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 854         TX_STATUS_FAIL(PASSIVE_NO_RX);
 855         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 856         }
 857
 858         return "UNKNOWN";
 859
 860 #undef TX_STATUS_FAIL
 861 #undef TX_STATUS_POSTPONE
 862 }
 863 #endif /* CONFIG_IWLWIFI_DEBUG */
 864
 865 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 866 {
 867         status &= AGG_TX_STATUS_MSK;
 868
 869         switch (status) {
 870         case AGG_TX_STATE_UNDERRUN_MSK:
 871                 priv->reply_agg_tx_stats.underrun++;
 872                 break;
 873         case AGG_TX_STATE_BT_PRIO_MSK:
 874                 priv->reply_agg_tx_stats.bt_prio++;
 875                 break;
 876         case AGG_TX_STATE_FEW_BYTES_MSK:
 877                 priv->reply_agg_tx_stats.few_bytes++;
 878                 break;
 879         case AGG_TX_STATE_ABORT_MSK:
 880                 priv->reply_agg_tx_stats.abort++;
 881                 break;
 882         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 883                 priv->reply_agg_tx_stats.last_sent_ttl++;
 884                 break;
 885         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 886                 priv->reply_agg_tx_stats.last_sent_try++;
 887                 break;
 888         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 889                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 890                 break;
 891         case AGG_TX_STATE_SCD_QUERY_MSK:
 892                 priv->reply_agg_tx_stats.scd_query++;
 893                 break;
 894         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 895                 priv->reply_agg_tx_stats.bad_crc32++;
 896                 break;
 897         case AGG_TX_STATE_RESPONSE_MSK:
 898                 priv->reply_agg_tx_stats.response++;
 899                 break;
 900         case AGG_TX_STATE_DUMP_TX_MSK:
 901                 priv->reply_agg_tx_stats.dump_tx++;
 902                 break;
 903         case AGG_TX_STATE_DELAY_TX_MSK:
 904                 priv->reply_agg_tx_stats.delay_tx++;
 905                 break;
 906         default:
 907                 priv->reply_agg_tx_stats.unknown++;
 908                 break;
 909         }
 910 }
 911
 912 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 913 {
 914         return le32_to_cpup((__le32 *)&tx_resp->status +
 915                             tx_resp->frame_count) & IEEE80211_MAX_SN;
 916 }
 917
 918 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 919                                 struct iwlagn_tx_resp *tx_resp)
 920 {
 921         struct agg_tx_status *frame_status = &tx_resp->status;
 922         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 923                 IWLAGN_TX_RES_TID_POS;
 924         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 925                 IWLAGN_TX_RES_RA_POS;
 926         struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
 927         u32 status = le16_to_cpu(tx_resp->status.status);
 928         int i;
 929
 930         WARN_ON(tid == IWL_TID_NON_QOS);
 931
 932         if (agg->wait_for_ba)
 933                 IWL_DEBUG_TX_REPLY(priv,
 934                         "got tx response w/o block-ack\n");
 935
 936         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 937         agg->wait_for_ba = (tx_resp->frame_count > 1);
 938
 939         /*
 940          * If the BT kill count is non-zero, we'll get this
 941          * notification again.
 942          */
 943         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 944             priv->lib->bt_params &&
 945             priv->lib->bt_params->advanced_bt_coexist) {
 946                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 947         }
 948
 949         if (tx_resp->frame_count == 1)
 950                 return;
 951
 952         IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
 953                            agg->txq_id,
 954                            le32_to_cpu(tx_resp->rate_n_flags),
 955                            iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
 956
 957         /* Construct bit-map of pending frames within Tx window */
 958         for (i = 0; i < tx_resp->frame_count; i++) {
 959                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 960                 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
 961
 962                 if (status & AGG_TX_STATUS_MSK)
 963                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 964
 965                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 966                               AGG_TX_STATE_ABORT_MSK))
 967                         continue;
 968
 969                 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
 970                         IWL_DEBUG_TX_REPLY(priv,
 971                                            "%d: status %s (0x%04x), try-count (0x%01x)\n",
 972                                            i,
 973                                            iwl_get_agg_tx_fail_reason(fstatus),
 974                                            fstatus & AGG_TX_STATUS_MSK,
 975                                            retry_cnt);
 976         }
 977 }
 978
 979 #ifdef CONFIG_IWLWIFI_DEBUG
 980 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 981
 982 const char *iwl_get_agg_tx_fail_reason(u16 status)
 983 {
 984         status &= AGG_TX_STATUS_MSK;
 985         switch (status) {
 986         case AGG_TX_STATE_TRANSMITTED:
 987                 return "SUCCESS";
 988                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 989                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 990                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 991                 AGG_TX_STATE_FAIL(ABORT_MSK);
 992                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 993                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 994                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 995                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 996                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 997                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 998                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 999                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1000         }
1001
1002         return "UNKNOWN";
1003 }
1004 #endif /* CONFIG_IWLWIFI_DEBUG */
1005
1006 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1007 {
1008         status &= TX_STATUS_MSK;
1009
1010         switch (status) {
1011         case TX_STATUS_POSTPONE_DELAY:
1012                 priv->reply_tx_stats.pp_delay++;
1013                 break;
1014         case TX_STATUS_POSTPONE_FEW_BYTES:
1015                 priv->reply_tx_stats.pp_few_bytes++;
1016                 break;
1017         case TX_STATUS_POSTPONE_BT_PRIO:
1018                 priv->reply_tx_stats.pp_bt_prio++;
1019                 break;
1020         case TX_STATUS_POSTPONE_QUIET_PERIOD:
1021                 priv->reply_tx_stats.pp_quiet_period++;
1022                 break;
1023         case TX_STATUS_POSTPONE_CALC_TTAK:
1024                 priv->reply_tx_stats.pp_calc_ttak++;
1025                 break;
1026         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1027                 priv->reply_tx_stats.int_crossed_retry++;
1028                 break;
1029         case TX_STATUS_FAIL_SHORT_LIMIT:
1030                 priv->reply_tx_stats.short_limit++;
1031                 break;
1032         case TX_STATUS_FAIL_LONG_LIMIT:
1033                 priv->reply_tx_stats.long_limit++;
1034                 break;
1035         case TX_STATUS_FAIL_FIFO_UNDERRUN:
1036                 priv->reply_tx_stats.fifo_underrun++;
1037                 break;
1038         case TX_STATUS_FAIL_DRAIN_FLOW:
1039                 priv->reply_tx_stats.drain_flow++;
1040                 break;
1041         case TX_STATUS_FAIL_RFKILL_FLUSH:
1042                 priv->reply_tx_stats.rfkill_flush++;
1043                 break;
1044         case TX_STATUS_FAIL_LIFE_EXPIRE:
1045                 priv->reply_tx_stats.life_expire++;
1046                 break;
1047         case TX_STATUS_FAIL_DEST_PS:
1048                 priv->reply_tx_stats.dest_ps++;
1049                 break;
1050         case TX_STATUS_FAIL_HOST_ABORTED:
1051                 priv->reply_tx_stats.host_abort++;
1052                 break;
1053         case TX_STATUS_FAIL_BT_RETRY:
1054                 priv->reply_tx_stats.bt_retry++;
1055                 break;
1056         case TX_STATUS_FAIL_STA_INVALID:
1057                 priv->reply_tx_stats.sta_invalid++;
1058                 break;
1059         case TX_STATUS_FAIL_FRAG_DROPPED:
1060                 priv->reply_tx_stats.frag_drop++;
1061                 break;
1062         case TX_STATUS_FAIL_TID_DISABLE:
1063                 priv->reply_tx_stats.tid_disable++;
1064                 break;
1065         case TX_STATUS_FAIL_FIFO_FLUSHED:
1066                 priv->reply_tx_stats.fifo_flush++;
1067                 break;
1068         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1069                 priv->reply_tx_stats.insuff_cf_poll++;
1070                 break;
1071         case TX_STATUS_FAIL_PASSIVE_NO_RX:
1072                 priv->reply_tx_stats.fail_hw_drop++;
1073                 break;
1074         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1075                 priv->reply_tx_stats.sta_color_mismatch++;
1076                 break;
1077         default:
1078                 priv->reply_tx_stats.unknown++;
1079                 break;
1080         }
1081 }
1082
1083 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1084                                  struct ieee80211_tx_info *info,
1085                                  struct iwlagn_tx_resp *tx_resp)
1086 {
1087         u16 status = le16_to_cpu(tx_resp->status.status);
1088
1089         info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1090
1091         info->status.rates[0].count = tx_resp->failure_frame + 1;
1092         info->flags |= iwl_tx_status_to_mac80211(status);
1093         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1094                                     info);
1095         if (!iwl_is_tx_success(status))
1096                 iwlagn_count_tx_err_status(priv, status);
1097 }
1098
1099 static void iwl_check_abort_status(struct iwl_priv *priv,
1100                             u8 frame_count, u32 status)
1101 {
1102         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1103                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1104                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1105                         queue_work(priv->workqueue, &priv->tx_flush);
1106         }
1107 }
1108
1109 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1110 {
1111         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1112         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1113         int txq_id = SEQ_TO_QUEUE(sequence);
1114         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1115         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1116         struct ieee80211_hdr *hdr;
1117         u32 status = le16_to_cpu(tx_resp->status.status);
1118         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1119         int tid;
1120         int sta_id;
1121         int freed;
1122         struct ieee80211_tx_info *info;
1123         struct sk_buff_head skbs;
1124         struct sk_buff *skb;
1125         struct iwl_rxon_context *ctx;
1126         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1127
1128         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1129                 IWLAGN_TX_RES_TID_POS;
1130         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1131                 IWLAGN_TX_RES_RA_POS;
1132
1133         spin_lock_bh(&priv->sta_lock);
1134
1135         if (is_agg) {
1136                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1137                              tid >= IWL_MAX_TID_COUNT);
1138                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1139                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1140                                 priv->tid_data[sta_id][tid].agg.txq_id);
1141                 iwl_rx_reply_tx_agg(priv, tx_resp);
1142         }
1143
1144         __skb_queue_head_init(&skbs);
1145
1146         if (tx_resp->frame_count == 1) {
1147                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1148                 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1149
1150                 if (is_agg) {
1151                         /* If this is an aggregation queue, we can rely on the
1152                          * ssn since the wifi sequence number corresponds to
1153                          * the index in the TFD ring (%256).
1154                          * The seq_ctl is the sequence control of the packet
1155                          * to which this Tx response relates. But if there is a
1156                          * hole in the bitmap of the BA we received, this Tx
1157                          * response may allow to reclaim the hole and all the
1158                          * subsequent packets that were already acked.
1159                          * In that case, seq_ctl != ssn, and the next packet
1160                          * to be reclaimed will be ssn and not seq_ctl.
1161                          */
1162                         next_reclaimed = ssn;
1163                 }
1164
1165                 if (tid != IWL_TID_NON_QOS) {
1166                         priv->tid_data[sta_id][tid].next_reclaimed =
1167                                 next_reclaimed;
1168                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1169                                                   next_reclaimed);
1170                         iwlagn_check_ratid_empty(priv, sta_id, tid);
1171                 }
1172
1173                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs, false);
1174
1175                 freed = 0;
1176
1177                 /* process frames */
1178                 skb_queue_walk(&skbs, skb) {
1179                         hdr = (struct ieee80211_hdr *)skb->data;
1180
1181                         if (!ieee80211_is_data_qos(hdr->frame_control))
1182                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1183
1184                         info = IEEE80211_SKB_CB(skb);
1185                         ctx = info->driver_data[0];
1186                         iwl_trans_free_tx_cmd(priv->trans,
1187                                               info->driver_data[1]);
1188
1189                         memset(&info->status, 0, sizeof(info->status));
1190
1191                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1192                             ctx->vif &&
1193                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1194                                 /* block and stop all queues */
1195                                 priv->passive_no_rx = true;
1196                                 IWL_DEBUG_TX_QUEUES(priv,
1197                                         "stop all queues: passive channel\n");
1198                                 ieee80211_stop_queues(priv->hw);
1199
1200                                 IWL_DEBUG_TX_REPLY(priv,
1201                                            "TXQ %d status %s (0x%08x) "
1202                                            "rate_n_flags 0x%x retries %d\n",
1203                                            txq_id,
1204                                            iwl_get_tx_fail_reason(status),
1205                                            status,
1206                                            le32_to_cpu(tx_resp->rate_n_flags),
1207                                            tx_resp->failure_frame);
1208
1209                                 IWL_DEBUG_TX_REPLY(priv,
1210                                            "FrameCnt = %d, idx=%d\n",
1211                                            tx_resp->frame_count, cmd_index);
1212                         }
1213
1214                         /* check if BAR is needed */
1215                         if (is_agg && !iwl_is_tx_success(status))
1216                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1217                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1218                                      tx_resp);
1219                         if (!is_agg)
1220                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1221
1222                         freed++;
1223                 }
1224
1225                 if (tid != IWL_TID_NON_QOS) {
1226                         priv->tid_data[sta_id][tid].next_reclaimed =
1227                                 next_reclaimed;
1228                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1229                                            next_reclaimed);
1230                 }
1231
1232                 if (!is_agg && freed != 1)
1233                         IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1234
1235                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1236                                    iwl_get_tx_fail_reason(status), status);
1237
1238                 IWL_DEBUG_TX_REPLY(priv,
1239                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1240                                    le32_to_cpu(tx_resp->rate_n_flags),
1241                                    tx_resp->failure_frame,
1242                                    SEQ_TO_INDEX(sequence), ssn,
1243                                    le16_to_cpu(tx_resp->seq_ctl));
1244         }
1245
1246         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1247         spin_unlock_bh(&priv->sta_lock);
1248
1249         while (!skb_queue_empty(&skbs)) {
1250                 skb = __skb_dequeue(&skbs);
1251                 ieee80211_tx_status_skb(priv->hw, skb);
1252         }
1253 }
1254
1255 /*
1256  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1257  *
1258  * Handles block-acknowledge notification from device, which reports success
1259  * of frames sent via aggregation.
1260  */
1261 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1262                                    struct iwl_rx_cmd_buffer *rxb)
1263 {
1264         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1265         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1266         struct iwl_ht_agg *agg;
1267         struct sk_buff_head reclaimed_skbs;
1268         struct sk_buff *skb;
1269         int sta_id;
1270         int tid;
1271         int freed;
1272
1273         /* "flow" corresponds to Tx queue */
1274         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1275
1276         /* "ssn" is start of block-ack Tx window, corresponds to index
1277          * (in Tx queue's circular buffer) of first TFD/frame in window */
1278         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1279
1280         if (scd_flow >= priv->trans->trans_cfg->base_params->num_of_queues) {
1281                 IWL_ERR(priv,
1282                         "BUG_ON scd_flow is bigger than number of queues\n");
1283                 return;
1284         }
1285
1286         sta_id = ba_resp->sta_id;
1287         tid = ba_resp->tid;
1288         agg = &priv->tid_data[sta_id][tid].agg;
1289
1290         spin_lock_bh(&priv->sta_lock);
1291
1292         if (unlikely(!agg->wait_for_ba)) {
1293                 if (unlikely(ba_resp->bitmap))
1294                         IWL_ERR(priv, "Received BA when not expected\n");
1295                 spin_unlock_bh(&priv->sta_lock);
1296                 return;
1297         }
1298
1299         if (unlikely(scd_flow != agg->txq_id)) {
1300                 /*
1301                  * FIXME: this is a uCode bug which need to be addressed,
1302                  * log the information and return for now.
1303                  * Since it is can possibly happen very often and in order
1304                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1305                  */
1306                 IWL_DEBUG_TX_QUEUES(priv,
1307                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1308                                     scd_flow, sta_id, tid, agg->txq_id);
1309                 spin_unlock_bh(&priv->sta_lock);
1310                 return;
1311         }
1312
1313         __skb_queue_head_init(&reclaimed_skbs);
1314
1315         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1316          * block-ack window (we assume that they've been successfully
1317          * transmitted ... if not, it's too late anyway). */
1318         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1319                           &reclaimed_skbs, false);
1320
1321         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1322                            "sta_id = %d\n",
1323                            agg->wait_for_ba,
1324                            (u8 *) &ba_resp->sta_addr_lo32,
1325                            ba_resp->sta_id);
1326         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1327                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1328                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1329                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1330                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1331                            ba_resp->txed_2_done);
1332
1333         /* Mark that the expected block-ack response arrived */
1334         agg->wait_for_ba = false;
1335
1336         /* Sanity check values reported by uCode */
1337         if (ba_resp->txed_2_done > ba_resp->txed) {
1338                 IWL_DEBUG_TX_REPLY(priv,
1339                         "bogus sent(%d) and ack(%d) count\n",
1340                         ba_resp->txed, ba_resp->txed_2_done);
1341                 /*
1342                  * set txed_2_done = txed,
1343                  * so it won't impact rate scale
1344                  */
1345                 ba_resp->txed = ba_resp->txed_2_done;
1346         }
1347
1348         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1349
1350         iwlagn_check_ratid_empty(priv, sta_id, tid);
1351         freed = 0;
1352
1353         skb_queue_walk(&reclaimed_skbs, skb) {
1354                 struct ieee80211_hdr *hdr = (void *)skb->data;
1355                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1356
1357                 if (ieee80211_is_data_qos(hdr->frame_control))
1358                         freed++;
1359                 else
1360                         WARN_ON_ONCE(1);
1361
1362                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1363
1364                 memset(&info->status, 0, sizeof(info->status));
1365                 /* Packet was transmitted successfully, failures come as single
1366                  * frames because before failing a frame the firmware transmits
1367                  * it without aggregation at least once.
1368                  */
1369                 info->flags |= IEEE80211_TX_STAT_ACK;
1370
1371                 if (freed == 1) {
1372                         /* this is the first skb we deliver in this batch */
1373                         /* put the rate scaling data there */
1374                         info = IEEE80211_SKB_CB(skb);
1375                         memset(&info->status, 0, sizeof(info->status));
1376                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1377                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1378                         info->status.ampdu_len = ba_resp->txed;
1379                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1380                                                     info);
1381                 }
1382         }
1383
1384         spin_unlock_bh(&priv->sta_lock);
1385
1386         while (!skb_queue_empty(&reclaimed_skbs)) {
1387                 skb = __skb_dequeue(&reclaimed_skbs);
1388                 ieee80211_tx_status_skb(priv->hw, skb);
1389         }
1390 }