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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * The full GNU General Public License is included in this distribution
  17  * in the file called COPYING.
  18  *
  19  * Contact Information:
  20  *  Intel Linux Wireless <linuxwifi@intel.com>
  21  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  22  *
  23  *****************************************************************************/
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/sched.h>
  28 #include <linux/ieee80211.h>
  29 #include "iwl-io.h"
  30 #include "iwl-trans.h"
  31 #include "iwl-agn-hw.h"
  32 #include "dev.h"
  33 #include "agn.h"
  34
  35 static const u8 tid_to_ac[] = {
  36         IEEE80211_AC_BE,
  37         IEEE80211_AC_BK,
  38         IEEE80211_AC_BK,
  39         IEEE80211_AC_BE,
  40         IEEE80211_AC_VI,
  41         IEEE80211_AC_VI,
  42         IEEE80211_AC_VO,
  43         IEEE80211_AC_VO,
  44 };
  45
  46 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
  47                                      struct ieee80211_tx_info *info,
  48                                      __le16 fc, __le32 *tx_flags)
  49 {
  50         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
  51             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
  52             info->flags & IEEE80211_TX_CTL_AMPDU)
  53                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
  54 }
  55
  56 /*
  57  * handle build REPLY_TX command notification.
  58  */
  59 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
  60                                       struct sk_buff *skb,
  61                                       struct iwl_tx_cmd *tx_cmd,
  62                                       struct ieee80211_tx_info *info,
  63                                       struct ieee80211_hdr *hdr, u8 sta_id)
  64 {
  65         __le16 fc = hdr->frame_control;
  66         __le32 tx_flags = tx_cmd->tx_flags;
  67
  68         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
  69
  70         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  71                 tx_flags |= TX_CMD_FLG_ACK_MSK;
  72         else
  73                 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
  74
  75         if (ieee80211_is_probe_resp(fc))
  76                 tx_flags |= TX_CMD_FLG_TSF_MSK;
  77         else if (ieee80211_is_back_req(fc))
  78                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
  79         else if (info->band == NL80211_BAND_2GHZ &&
  80                  priv->lib->bt_params &&
  81                  priv->lib->bt_params->advanced_bt_coexist &&
  82                  (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
  83                  ieee80211_is_reassoc_req(fc) ||
  84                  info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
  85                 tx_flags |= TX_CMD_FLG_IGNORE_BT;
  86
  87
  88         tx_cmd->sta_id = sta_id;
  89         if (ieee80211_has_morefrags(fc))
  90                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
  91
  92         if (ieee80211_is_data_qos(fc)) {
  93                 u8 *qc = ieee80211_get_qos_ctl(hdr);
  94                 tx_cmd->tid_tspec = qc[0] & 0xf;
  95                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  96         } else {
  97                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
  98                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
  99                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 100                 else
 101                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 102         }
 103
 104         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
 105
 106         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 107         if (ieee80211_is_mgmt(fc)) {
 108                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 109                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 110                 else
 111                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 112         } else {
 113                 tx_cmd->timeout.pm_frame_timeout = 0;
 114         }
 115
 116         tx_cmd->driver_txop = 0;
 117         tx_cmd->tx_flags = tx_flags;
 118         tx_cmd->next_frame_len = 0;
 119 }
 120
 121 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 122                                      struct iwl_tx_cmd *tx_cmd,
 123                                      struct ieee80211_tx_info *info,
 124                                      struct ieee80211_sta *sta,
 125                                      __le16 fc)
 126 {
 127         u32 rate_flags;
 128         int rate_idx;
 129         u8 rts_retry_limit;
 130         u8 data_retry_limit;
 131         u8 rate_plcp;
 132
 133         if (priv->wowlan) {
 134                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 135                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 136         } else {
 137                 /* Set retry limit on RTS packets */
 138                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 139
 140                 /* Set retry limit on DATA packets and Probe Responses*/
 141                 if (ieee80211_is_probe_resp(fc)) {
 142                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 143                         rts_retry_limit =
 144                                 min(data_retry_limit, rts_retry_limit);
 145                 } else if (ieee80211_is_back_req(fc))
 146                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 147                 else
 148                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 149         }
 150
 151         tx_cmd->data_retry_limit = data_retry_limit;
 152         tx_cmd->rts_retry_limit = rts_retry_limit;
 153
 154         /* DATA packets will use the uCode station table for rate/antenna
 155          * selection */
 156         if (ieee80211_is_data(fc)) {
 157                 tx_cmd->initial_rate_index = 0;
 158                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 159                 return;
 160         } else if (ieee80211_is_back_req(fc))
 161                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 162
 163         /**
 164          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 165          * not really a TX rate.  Thus, we use the lowest supported rate for
 166          * this band.  Also use the lowest supported rate if the stored rate
 167          * index is invalid.
 168          */
 169         rate_idx = info->control.rates[0].idx;
 170         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 171                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 172                 rate_idx = rate_lowest_index(
 173                                 &priv->nvm_data->bands[info->band], sta);
 174         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 175         if (info->band == NL80211_BAND_5GHZ)
 176                 rate_idx += IWL_FIRST_OFDM_RATE;
 177         /* Get PLCP rate for tx_cmd->rate_n_flags */
 178         rate_plcp = iwl_rates[rate_idx].plcp;
 179         /* Zero out flags for this packet */
 180         rate_flags = 0;
 181
 182         /* Set CCK flag as needed */
 183         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 184                 rate_flags |= RATE_MCS_CCK_MSK;
 185
 186         /* Set up antennas */
 187         if (priv->lib->bt_params &&
 188             priv->lib->bt_params->advanced_bt_coexist &&
 189             priv->bt_full_concurrent) {
 190                 /* operated as 1x1 in full concurrency mode */
 191                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 192                                 first_antenna(priv->nvm_data->valid_tx_ant));
 193         } else
 194                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
 195                                         priv, priv->mgmt_tx_ant,
 196                                         priv->nvm_data->valid_tx_ant);
 197         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 198
 199         /* Set the rate in the TX cmd */
 200         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 201 }
 202
 203 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 204                                          struct ieee80211_tx_info *info,
 205                                          struct iwl_tx_cmd *tx_cmd,
 206                                          struct sk_buff *skb_frag)
 207 {
 208         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 209
 210         switch (keyconf->cipher) {
 211         case WLAN_CIPHER_SUITE_CCMP:
 212                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 213                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 214                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 215                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 216                 break;
 217
 218         case WLAN_CIPHER_SUITE_TKIP:
 219                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 220                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 221                 break;
 222
 223         case WLAN_CIPHER_SUITE_WEP104:
 224                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 225                 /* fall through */
 226         case WLAN_CIPHER_SUITE_WEP40:
 227                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 228                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 229
 230                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 231
 232                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 233                              "with key %d\n", keyconf->keyidx);
 234                 break;
 235
 236         default:
 237                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 238                 break;
 239         }
 240 }
 241
 242 /**
 243  * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
 244  * @context: the current context
 245  * @sta: mac80211 station
 246  *
 247  * In certain circumstances mac80211 passes a station pointer
 248  * that may be %NULL, for example during TX or key setup. In
 249  * that case, we need to use the broadcast station, so this
 250  * inline wraps that pattern.
 251  */
 252 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
 253                                    struct ieee80211_sta *sta)
 254 {
 255         int sta_id;
 256
 257         if (!sta)
 258                 return context->bcast_sta_id;
 259
 260         sta_id = iwl_sta_id(sta);
 261
 262         /*
 263          * mac80211 should not be passing a partially
 264          * initialised station!
 265          */
 266         WARN_ON(sta_id == IWL_INVALID_STATION);
 267
 268         return sta_id;
 269 }
 270
 271 /*
 272  * start REPLY_TX command process
 273  */
 274 int iwlagn_tx_skb(struct iwl_priv *priv,
 275                   struct ieee80211_sta *sta,
 276                   struct sk_buff *skb)
 277 {
 278         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 279         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 280         struct iwl_station_priv *sta_priv = NULL;
 281         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 282         struct iwl_device_cmd *dev_cmd;
 283         struct iwl_tx_cmd *tx_cmd;
 284         __le16 fc;
 285         u8 hdr_len;
 286         u16 len, seq_number = 0;
 287         u8 sta_id, tid = IWL_MAX_TID_COUNT;
 288         bool is_agg = false, is_data_qos = false;
 289         int txq_id;
 290
 291         if (info->control.vif)
 292                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 293
 294         if (iwl_is_rfkill(priv)) {
 295                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 296                 goto drop_unlock_priv;
 297         }
 298
 299         fc = hdr->frame_control;
 300
 301 #ifdef CONFIG_IWLWIFI_DEBUG
 302         if (ieee80211_is_auth(fc))
 303                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 304         else if (ieee80211_is_assoc_req(fc))
 305                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 306         else if (ieee80211_is_reassoc_req(fc))
 307                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 308 #endif
 309
 310         if (unlikely(ieee80211_is_probe_resp(fc))) {
 311                 struct iwl_wipan_noa_data *noa_data =
 312                         rcu_dereference(priv->noa_data);
 313
 314                 if (noa_data &&
 315                     pskb_expand_head(skb, 0, noa_data->length,
 316                                      GFP_ATOMIC) == 0) {
 317                         skb_put_data(skb, noa_data->data, noa_data->length);
 318                         hdr = (struct ieee80211_hdr *)skb->data;
 319                 }
 320         }
 321
 322         hdr_len = ieee80211_hdrlen(fc);
 323
 324         /* For management frames use broadcast id to do not break aggregation */
 325         if (!ieee80211_is_data(fc))
 326                 sta_id = ctx->bcast_sta_id;
 327         else {
 328                 /* Find index into station table for destination station */
 329                 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
 330                 if (sta_id == IWL_INVALID_STATION) {
 331                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 332                                        hdr->addr1);
 333                         goto drop_unlock_priv;
 334                 }
 335         }
 336
 337         if (sta)
 338                 sta_priv = (void *)sta->drv_priv;
 339
 340         if (sta_priv && sta_priv->asleep &&
 341             (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
 342                 /*
 343                  * This sends an asynchronous command to the device,
 344                  * but we can rely on it being processed before the
 345                  * next frame is processed -- and the next frame to
 346                  * this station is the one that will consume this
 347                  * counter.
 348                  * For now set the counter to just 1 since we do not
 349                  * support uAPSD yet.
 350                  *
 351                  * FIXME: If we get two non-bufferable frames one
 352                  * after the other, we might only send out one of
 353                  * them because this is racy.
 354                  */
 355                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 356         }
 357
 358         dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
 359
 360         if (unlikely(!dev_cmd))
 361                 goto drop_unlock_priv;
 362
 363         memset(dev_cmd, 0, sizeof(*dev_cmd));
 364         dev_cmd->hdr.cmd = REPLY_TX;
 365         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 366
 367         /* Total # bytes to be transmitted */
 368         len = (u16)skb->len;
 369         tx_cmd->len = cpu_to_le16(len);
 370
 371         if (info->control.hw_key)
 372                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
 373
 374         /* TODO need this for burst mode later on */
 375         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 376
 377         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
 378
 379         memset(&info->status, 0, sizeof(info->status));
 380         memset(info->driver_data, 0, sizeof(info->driver_data));
 381
 382         info->driver_data[0] = ctx;
 383         info->driver_data[1] = dev_cmd;
 384         /* From now on, we cannot access info->control */
 385
 386         spin_lock(&priv->sta_lock);
 387
 388         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
 389                 u8 *qc = NULL;
 390                 struct iwl_tid_data *tid_data;
 391                 qc = ieee80211_get_qos_ctl(hdr);
 392                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 393                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 394                         goto drop_unlock_sta;
 395                 tid_data = &priv->tid_data[sta_id][tid];
 396
 397                 /* aggregation is on for this <sta,tid> */
 398                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 399                     tid_data->agg.state != IWL_AGG_ON) {
 400                         IWL_ERR(priv,
 401                                 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
 402                                 info->flags, tid_data->agg.state);
 403                         IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
 404                                 sta_id, tid,
 405                                 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
 406                         goto drop_unlock_sta;
 407                 }
 408
 409                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 410                  * only. Check this here.
 411                  */
 412                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 413                               tid_data->agg.state != IWL_AGG_OFF,
 414                               "Tx while agg.state = %d\n", tid_data->agg.state))
 415                         goto drop_unlock_sta;
 416
 417                 seq_number = tid_data->seq_number;
 418                 seq_number &= IEEE80211_SCTL_SEQ;
 419                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 420                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 421                 seq_number += 0x10;
 422
 423                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 424                         is_agg = true;
 425                 is_data_qos = true;
 426         }
 427
 428         /* Copy MAC header from skb into command buffer */
 429         memcpy(tx_cmd->hdr, hdr, hdr_len);
 430
 431         txq_id = info->hw_queue;
 432
 433         if (is_agg)
 434                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 435         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 436                 /*
 437                  * The microcode will clear the more data
 438                  * bit in the last frame it transmits.
 439                  */
 440                 hdr->frame_control |=
 441                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 442         }
 443
 444         WARN_ON_ONCE(is_agg &&
 445                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 446
 447         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 448                      txq_id, seq_number);
 449
 450         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 451                 goto drop_unlock_sta;
 452
 453         if (is_data_qos && !ieee80211_has_morefrags(fc))
 454                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 455
 456         spin_unlock(&priv->sta_lock);
 457
 458         /*
 459          * Avoid atomic ops if it isn't an associated client.
 460          * Also, if this is a packet for aggregation, don't
 461          * increase the counter because the ucode will stop
 462          * aggregation queues when their respective station
 463          * goes to sleep.
 464          */
 465         if (sta_priv && sta_priv->client && !is_agg)
 466                 atomic_inc(&sta_priv->pending_frames);
 467
 468         return 0;
 469
 470 drop_unlock_sta:
 471         if (dev_cmd)
 472                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 473         spin_unlock(&priv->sta_lock);
 474 drop_unlock_priv:
 475         return -1;
 476 }
 477
 478 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 479 {
 480         int q;
 481
 482         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 483              q < priv->cfg->base_params->num_of_queues; q++) {
 484                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 485                         priv->queue_to_mac80211[q] = mq;
 486                         return q;
 487                 }
 488         }
 489
 490         return -ENOSPC;
 491 }
 492
 493 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 494 {
 495         clear_bit(q, priv->agg_q_alloc);
 496         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 497 }
 498
 499 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 500                         struct ieee80211_sta *sta, u16 tid)
 501 {
 502         struct iwl_tid_data *tid_data;
 503         int sta_id, txq_id;
 504         enum iwl_agg_state agg_state;
 505
 506         sta_id = iwl_sta_id(sta);
 507
 508         if (sta_id == IWL_INVALID_STATION) {
 509                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 510                 return -ENXIO;
 511         }
 512
 513         spin_lock_bh(&priv->sta_lock);
 514
 515         tid_data = &priv->tid_data[sta_id][tid];
 516         txq_id = tid_data->agg.txq_id;
 517
 518         switch (tid_data->agg.state) {
 519         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 520                 /*
 521                 * This can happen if the peer stops aggregation
 522                 * again before we've had a chance to drain the
 523                 * queue we selected previously, i.e. before the
 524                 * session was really started completely.
 525                 */
 526                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 527                 goto turn_off;
 528         case IWL_AGG_STARTING:
 529                 /*
 530                  * This can happen when the session is stopped before
 531                  * we receive ADDBA response
 532                  */
 533                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 534                 goto turn_off;
 535         case IWL_AGG_ON:
 536                 break;
 537         default:
 538                 IWL_WARN(priv,
 539                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 540                          sta_id, tid, tid_data->agg.state);
 541                 spin_unlock_bh(&priv->sta_lock);
 542                 return 0;
 543         }
 544
 545         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 546
 547         /* There are still packets for this RA / TID in the HW */
 548         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 549                 IWL_DEBUG_TX_QUEUES(priv,
 550                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 551                         sta_id, tid, txq_id);
 552         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 553                 IWL_DEBUG_TX_QUEUES(priv,
 554                                     "Can't proceed: ssn %d, next_recl = %d\n",
 555                                     tid_data->agg.ssn,
 556                                     tid_data->next_reclaimed);
 557                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 558                 spin_unlock_bh(&priv->sta_lock);
 559                 return 0;
 560         }
 561
 562         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 563                             tid_data->agg.ssn);
 564 turn_off:
 565         agg_state = tid_data->agg.state;
 566         tid_data->agg.state = IWL_AGG_OFF;
 567
 568         spin_unlock_bh(&priv->sta_lock);
 569
 570         if (test_bit(txq_id, priv->agg_q_alloc)) {
 571                 /*
 572                  * If the transport didn't know that we wanted to start
 573                  * agreggation, don't tell it that we want to stop them.
 574                  * This can happen when we don't get the addBA response on
 575                  * time, or we hadn't time to drain the AC queues.
 576                  */
 577                 if (agg_state == IWL_AGG_ON)
 578                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 579                 else
 580                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 581                                             agg_state);
 582                 iwlagn_dealloc_agg_txq(priv, txq_id);
 583         }
 584
 585         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 586
 587         return 0;
 588 }
 589
 590 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 591                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 592 {
 593         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 594         struct iwl_tid_data *tid_data;
 595         int sta_id, txq_id, ret;
 596
 597         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 598                      sta->addr, tid);
 599
 600         sta_id = iwl_sta_id(sta);
 601         if (sta_id == IWL_INVALID_STATION) {
 602                 IWL_ERR(priv, "Start AGG on invalid station\n");
 603                 return -ENXIO;
 604         }
 605         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 606                 return -EINVAL;
 607
 608         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 609                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 610                 return -ENXIO;
 611         }
 612
 613         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 614         if (txq_id < 0) {
 615                 IWL_DEBUG_TX_QUEUES(priv,
 616                         "No free aggregation queue for %pM/%d\n",
 617                         sta->addr, tid);
 618                 return txq_id;
 619         }
 620
 621         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 622         if (ret)
 623                 return ret;
 624
 625         spin_lock_bh(&priv->sta_lock);
 626         tid_data = &priv->tid_data[sta_id][tid];
 627         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 628         tid_data->agg.txq_id = txq_id;
 629
 630         *ssn = tid_data->agg.ssn;
 631
 632         if (*ssn == tid_data->next_reclaimed) {
 633                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 634                                     tid_data->agg.ssn);
 635                 tid_data->agg.state = IWL_AGG_STARTING;
 636                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 637         } else {
 638                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 639                                     "next_reclaimed = %d\n",
 640                                     tid_data->agg.ssn,
 641                                     tid_data->next_reclaimed);
 642                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 643         }
 644         spin_unlock_bh(&priv->sta_lock);
 645
 646         return ret;
 647 }
 648
 649 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
 650                         struct ieee80211_sta *sta, u16 tid)
 651 {
 652         struct iwl_tid_data *tid_data;
 653         enum iwl_agg_state agg_state;
 654         int sta_id, txq_id;
 655         sta_id = iwl_sta_id(sta);
 656
 657         /*
 658          * First set the agg state to OFF to avoid calling
 659          * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
 660          */
 661         spin_lock_bh(&priv->sta_lock);
 662
 663         tid_data = &priv->tid_data[sta_id][tid];
 664         txq_id = tid_data->agg.txq_id;
 665         agg_state = tid_data->agg.state;
 666         IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
 667                             sta_id, tid, txq_id, tid_data->agg.state);
 668
 669         tid_data->agg.state = IWL_AGG_OFF;
 670
 671         spin_unlock_bh(&priv->sta_lock);
 672
 673         if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
 674                 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
 675
 676         if (test_bit(txq_id, priv->agg_q_alloc)) {
 677                 /*
 678                  * If the transport didn't know that we wanted to start
 679                  * agreggation, don't tell it that we want to stop them.
 680                  * This can happen when we don't get the addBA response on
 681                  * time, or we hadn't time to drain the AC queues.
 682                  */
 683                 if (agg_state == IWL_AGG_ON)
 684                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 685                 else
 686                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 687                                             agg_state);
 688                 iwlagn_dealloc_agg_txq(priv, txq_id);
 689         }
 690
 691         return 0;
 692 }
 693
 694 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 695                         struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 696 {
 697         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 698         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 699         int q, fifo;
 700         u16 ssn;
 701
 702         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 703
 704         spin_lock_bh(&priv->sta_lock);
 705         ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
 706         q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
 707         priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
 708         spin_unlock_bh(&priv->sta_lock);
 709
 710         fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
 711
 712         iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
 713                              buf_size, ssn, 0);
 714
 715         /*
 716          * If the limit is 0, then it wasn't initialised yet,
 717          * use the default. We can do that since we take the
 718          * minimum below, and we don't want to go above our
 719          * default due to hardware restrictions.
 720          */
 721         if (sta_priv->max_agg_bufsize == 0)
 722                 sta_priv->max_agg_bufsize =
 723                         LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 724
 725         /*
 726          * Even though in theory the peer could have different
 727          * aggregation reorder buffer sizes for different sessions,
 728          * our ucode doesn't allow for that and has a global limit
 729          * for each station. Therefore, use the minimum of all the
 730          * aggregation sessions and our default value.
 731          */
 732         sta_priv->max_agg_bufsize =
 733                 min(sta_priv->max_agg_bufsize, buf_size);
 734
 735         if (priv->hw_params.use_rts_for_aggregation) {
 736                 /*
 737                  * switch to RTS/CTS if it is the prefer protection
 738                  * method for HT traffic
 739                  */
 740
 741                 sta_priv->lq_sta.lq.general_params.flags |=
 742                         LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 743         }
 744         priv->agg_tids_count++;
 745         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 746                      priv->agg_tids_count);
 747
 748         sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 749                 sta_priv->max_agg_bufsize;
 750
 751         IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 752                  sta->addr, tid);
 753
 754         return iwl_send_lq_cmd(priv, ctx,
 755                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 756 }
 757
 758 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
 759 {
 760         struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
 761         enum iwl_rxon_context_id ctx;
 762         struct ieee80211_vif *vif;
 763         u8 *addr;
 764
 765         lockdep_assert_held(&priv->sta_lock);
 766
 767         addr = priv->stations[sta_id].sta.sta.addr;
 768         ctx = priv->stations[sta_id].ctxid;
 769         vif = priv->contexts[ctx].vif;
 770
 771         switch (priv->tid_data[sta_id][tid].agg.state) {
 772         case IWL_EMPTYING_HW_QUEUE_DELBA:
 773                 /* There are no packets for this RA / TID in the HW any more */
 774                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 775                         IWL_DEBUG_TX_QUEUES(priv,
 776                                 "Can continue DELBA flow ssn = next_recl = %d\n",
 777                                 tid_data->next_reclaimed);
 778                         iwl_trans_txq_disable(priv->trans,
 779                                               tid_data->agg.txq_id, true);
 780                         iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
 781                         tid_data->agg.state = IWL_AGG_OFF;
 782                         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 783                 }
 784                 break;
 785         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 786                 /* There are no packets for this RA / TID in the HW any more */
 787                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 788                         IWL_DEBUG_TX_QUEUES(priv,
 789                                 "Can continue ADDBA flow ssn = next_recl = %d\n",
 790                                 tid_data->next_reclaimed);
 791                         tid_data->agg.state = IWL_AGG_STARTING;
 792                         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
 793                 }
 794                 break;
 795         default:
 796                 break;
 797         }
 798 }
 799
 800 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 801                                      struct iwl_rxon_context *ctx,
 802                                      const u8 *addr1)
 803 {
 804         struct ieee80211_sta *sta;
 805         struct iwl_station_priv *sta_priv;
 806
 807         rcu_read_lock();
 808         sta = ieee80211_find_sta(ctx->vif, addr1);
 809         if (sta) {
 810                 sta_priv = (void *)sta->drv_priv;
 811                 /* avoid atomic ops if this isn't a client */
 812                 if (sta_priv->client &&
 813                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 814                         ieee80211_sta_block_awake(priv->hw, sta, false);
 815         }
 816         rcu_read_unlock();
 817 }
 818
 819 /**
 820  * translate ucode response to mac80211 tx status control values
 821  */
 822 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 823                                   struct ieee80211_tx_info *info)
 824 {
 825         struct ieee80211_tx_rate *r = &info->status.rates[0];
 826
 827         info->status.antenna =
 828                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 829         if (rate_n_flags & RATE_MCS_HT_MSK)
 830                 r->flags |= IEEE80211_TX_RC_MCS;
 831         if (rate_n_flags & RATE_MCS_GF_MSK)
 832                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 833         if (rate_n_flags & RATE_MCS_HT40_MSK)
 834                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 835         if (rate_n_flags & RATE_MCS_DUP_MSK)
 836                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 837         if (rate_n_flags & RATE_MCS_SGI_MSK)
 838                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 839         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 840 }
 841
 842 #ifdef CONFIG_IWLWIFI_DEBUG
 843 const char *iwl_get_tx_fail_reason(u32 status)
 844 {
 845 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 846 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 847
 848         switch (status & TX_STATUS_MSK) {
 849         case TX_STATUS_SUCCESS:
 850                 return "SUCCESS";
 851         TX_STATUS_POSTPONE(DELAY);
 852         TX_STATUS_POSTPONE(FEW_BYTES);
 853         TX_STATUS_POSTPONE(BT_PRIO);
 854         TX_STATUS_POSTPONE(QUIET_PERIOD);
 855         TX_STATUS_POSTPONE(CALC_TTAK);
 856         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 857         TX_STATUS_FAIL(SHORT_LIMIT);
 858         TX_STATUS_FAIL(LONG_LIMIT);
 859         TX_STATUS_FAIL(FIFO_UNDERRUN);
 860         TX_STATUS_FAIL(DRAIN_FLOW);
 861         TX_STATUS_FAIL(RFKILL_FLUSH);
 862         TX_STATUS_FAIL(LIFE_EXPIRE);
 863         TX_STATUS_FAIL(DEST_PS);
 864         TX_STATUS_FAIL(HOST_ABORTED);
 865         TX_STATUS_FAIL(BT_RETRY);
 866         TX_STATUS_FAIL(STA_INVALID);
 867         TX_STATUS_FAIL(FRAG_DROPPED);
 868         TX_STATUS_FAIL(TID_DISABLE);
 869         TX_STATUS_FAIL(FIFO_FLUSHED);
 870         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 871         TX_STATUS_FAIL(PASSIVE_NO_RX);
 872         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 873         }
 874
 875         return "UNKNOWN";
 876
 877 #undef TX_STATUS_FAIL
 878 #undef TX_STATUS_POSTPONE
 879 }
 880 #endif /* CONFIG_IWLWIFI_DEBUG */
 881
 882 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 883 {
 884         status &= AGG_TX_STATUS_MSK;
 885
 886         switch (status) {
 887         case AGG_TX_STATE_UNDERRUN_MSK:
 888                 priv->reply_agg_tx_stats.underrun++;
 889                 break;
 890         case AGG_TX_STATE_BT_PRIO_MSK:
 891                 priv->reply_agg_tx_stats.bt_prio++;
 892                 break;
 893         case AGG_TX_STATE_FEW_BYTES_MSK:
 894                 priv->reply_agg_tx_stats.few_bytes++;
 895                 break;
 896         case AGG_TX_STATE_ABORT_MSK:
 897                 priv->reply_agg_tx_stats.abort++;
 898                 break;
 899         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 900                 priv->reply_agg_tx_stats.last_sent_ttl++;
 901                 break;
 902         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 903                 priv->reply_agg_tx_stats.last_sent_try++;
 904                 break;
 905         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 906                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 907                 break;
 908         case AGG_TX_STATE_SCD_QUERY_MSK:
 909                 priv->reply_agg_tx_stats.scd_query++;
 910                 break;
 911         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 912                 priv->reply_agg_tx_stats.bad_crc32++;
 913                 break;
 914         case AGG_TX_STATE_RESPONSE_MSK:
 915                 priv->reply_agg_tx_stats.response++;
 916                 break;
 917         case AGG_TX_STATE_DUMP_TX_MSK:
 918                 priv->reply_agg_tx_stats.dump_tx++;
 919                 break;
 920         case AGG_TX_STATE_DELAY_TX_MSK:
 921                 priv->reply_agg_tx_stats.delay_tx++;
 922                 break;
 923         default:
 924                 priv->reply_agg_tx_stats.unknown++;
 925                 break;
 926         }
 927 }
 928
 929 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 930 {
 931         return le32_to_cpup((__le32 *)&tx_resp->status +
 932                             tx_resp->frame_count) & IEEE80211_MAX_SN;
 933 }
 934
 935 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 936                                 struct iwlagn_tx_resp *tx_resp)
 937 {
 938         struct agg_tx_status *frame_status = &tx_resp->status;
 939         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 940                 IWLAGN_TX_RES_TID_POS;
 941         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 942                 IWLAGN_TX_RES_RA_POS;
 943         struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
 944         u32 status = le16_to_cpu(tx_resp->status.status);
 945         int i;
 946
 947         WARN_ON(tid == IWL_TID_NON_QOS);
 948
 949         if (agg->wait_for_ba)
 950                 IWL_DEBUG_TX_REPLY(priv,
 951                         "got tx response w/o block-ack\n");
 952
 953         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 954         agg->wait_for_ba = (tx_resp->frame_count > 1);
 955
 956         /*
 957          * If the BT kill count is non-zero, we'll get this
 958          * notification again.
 959          */
 960         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 961             priv->lib->bt_params &&
 962             priv->lib->bt_params->advanced_bt_coexist) {
 963                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 964         }
 965
 966         if (tx_resp->frame_count == 1)
 967                 return;
 968
 969         IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
 970                            agg->txq_id,
 971                            le32_to_cpu(tx_resp->rate_n_flags),
 972                            iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
 973
 974         /* Construct bit-map of pending frames within Tx window */
 975         for (i = 0; i < tx_resp->frame_count; i++) {
 976                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 977                 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
 978
 979                 if (status & AGG_TX_STATUS_MSK)
 980                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 981
 982                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 983                               AGG_TX_STATE_ABORT_MSK))
 984                         continue;
 985
 986                 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
 987                         IWL_DEBUG_TX_REPLY(priv,
 988                                            "%d: status %s (0x%04x), try-count (0x%01x)\n",
 989                                            i,
 990                                            iwl_get_agg_tx_fail_reason(fstatus),
 991                                            fstatus & AGG_TX_STATUS_MSK,
 992                                            retry_cnt);
 993         }
 994 }
 995
 996 #ifdef CONFIG_IWLWIFI_DEBUG
 997 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 998
 999 const char *iwl_get_agg_tx_fail_reason(u16 status)
1000 {
1001         status &= AGG_TX_STATUS_MSK;
1002         switch (status) {
1003         case AGG_TX_STATE_TRANSMITTED:
1004                 return "SUCCESS";
1005                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1006                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1007                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1008                 AGG_TX_STATE_FAIL(ABORT_MSK);
1009                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1010                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1011                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1012                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1013                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1014                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1015                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1016                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1017         }
1018
1019         return "UNKNOWN";
1020 }
1021 #endif /* CONFIG_IWLWIFI_DEBUG */
1022
1023 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1024 {
1025         status &= TX_STATUS_MSK;
1026
1027         switch (status) {
1028         case TX_STATUS_POSTPONE_DELAY:
1029                 priv->reply_tx_stats.pp_delay++;
1030                 break;
1031         case TX_STATUS_POSTPONE_FEW_BYTES:
1032                 priv->reply_tx_stats.pp_few_bytes++;
1033                 break;
1034         case TX_STATUS_POSTPONE_BT_PRIO:
1035                 priv->reply_tx_stats.pp_bt_prio++;
1036                 break;
1037         case TX_STATUS_POSTPONE_QUIET_PERIOD:
1038                 priv->reply_tx_stats.pp_quiet_period++;
1039                 break;
1040         case TX_STATUS_POSTPONE_CALC_TTAK:
1041                 priv->reply_tx_stats.pp_calc_ttak++;
1042                 break;
1043         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1044                 priv->reply_tx_stats.int_crossed_retry++;
1045                 break;
1046         case TX_STATUS_FAIL_SHORT_LIMIT:
1047                 priv->reply_tx_stats.short_limit++;
1048                 break;
1049         case TX_STATUS_FAIL_LONG_LIMIT:
1050                 priv->reply_tx_stats.long_limit++;
1051                 break;
1052         case TX_STATUS_FAIL_FIFO_UNDERRUN:
1053                 priv->reply_tx_stats.fifo_underrun++;
1054                 break;
1055         case TX_STATUS_FAIL_DRAIN_FLOW:
1056                 priv->reply_tx_stats.drain_flow++;
1057                 break;
1058         case TX_STATUS_FAIL_RFKILL_FLUSH:
1059                 priv->reply_tx_stats.rfkill_flush++;
1060                 break;
1061         case TX_STATUS_FAIL_LIFE_EXPIRE:
1062                 priv->reply_tx_stats.life_expire++;
1063                 break;
1064         case TX_STATUS_FAIL_DEST_PS:
1065                 priv->reply_tx_stats.dest_ps++;
1066                 break;
1067         case TX_STATUS_FAIL_HOST_ABORTED:
1068                 priv->reply_tx_stats.host_abort++;
1069                 break;
1070         case TX_STATUS_FAIL_BT_RETRY:
1071                 priv->reply_tx_stats.bt_retry++;
1072                 break;
1073         case TX_STATUS_FAIL_STA_INVALID:
1074                 priv->reply_tx_stats.sta_invalid++;
1075                 break;
1076         case TX_STATUS_FAIL_FRAG_DROPPED:
1077                 priv->reply_tx_stats.frag_drop++;
1078                 break;
1079         case TX_STATUS_FAIL_TID_DISABLE:
1080                 priv->reply_tx_stats.tid_disable++;
1081                 break;
1082         case TX_STATUS_FAIL_FIFO_FLUSHED:
1083                 priv->reply_tx_stats.fifo_flush++;
1084                 break;
1085         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1086                 priv->reply_tx_stats.insuff_cf_poll++;
1087                 break;
1088         case TX_STATUS_FAIL_PASSIVE_NO_RX:
1089                 priv->reply_tx_stats.fail_hw_drop++;
1090                 break;
1091         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1092                 priv->reply_tx_stats.sta_color_mismatch++;
1093                 break;
1094         default:
1095                 priv->reply_tx_stats.unknown++;
1096                 break;
1097         }
1098 }
1099
1100 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1101                                  struct ieee80211_tx_info *info,
1102                                  struct iwlagn_tx_resp *tx_resp)
1103 {
1104         u16 status = le16_to_cpu(tx_resp->status.status);
1105
1106         info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1107
1108         info->status.rates[0].count = tx_resp->failure_frame + 1;
1109         info->flags |= iwl_tx_status_to_mac80211(status);
1110         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1111                                     info);
1112         if (!iwl_is_tx_success(status))
1113                 iwlagn_count_tx_err_status(priv, status);
1114 }
1115
1116 static void iwl_check_abort_status(struct iwl_priv *priv,
1117                             u8 frame_count, u32 status)
1118 {
1119         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1120                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1121                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1122                         queue_work(priv->workqueue, &priv->tx_flush);
1123         }
1124 }
1125
1126 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1127 {
1128         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1129         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1130         int txq_id = SEQ_TO_QUEUE(sequence);
1131         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1132         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1133         struct ieee80211_hdr *hdr;
1134         u32 status = le16_to_cpu(tx_resp->status.status);
1135         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1136         int tid;
1137         int sta_id;
1138         int freed;
1139         struct ieee80211_tx_info *info;
1140         struct sk_buff_head skbs;
1141         struct sk_buff *skb;
1142         struct iwl_rxon_context *ctx;
1143         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1144
1145         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1146                 IWLAGN_TX_RES_TID_POS;
1147         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1148                 IWLAGN_TX_RES_RA_POS;
1149
1150         spin_lock_bh(&priv->sta_lock);
1151
1152         if (is_agg) {
1153                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1154                              tid >= IWL_MAX_TID_COUNT);
1155                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1156                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1157                                 priv->tid_data[sta_id][tid].agg.txq_id);
1158                 iwl_rx_reply_tx_agg(priv, tx_resp);
1159         }
1160
1161         __skb_queue_head_init(&skbs);
1162
1163         if (tx_resp->frame_count == 1) {
1164                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1165                 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1166
1167                 if (is_agg) {
1168                         /* If this is an aggregation queue, we can rely on the
1169                          * ssn since the wifi sequence number corresponds to
1170                          * the index in the TFD ring (%256).
1171                          * The seq_ctl is the sequence control of the packet
1172                          * to which this Tx response relates. But if there is a
1173                          * hole in the bitmap of the BA we received, this Tx
1174                          * response may allow to reclaim the hole and all the
1175                          * subsequent packets that were already acked.
1176                          * In that case, seq_ctl != ssn, and the next packet
1177                          * to be reclaimed will be ssn and not seq_ctl.
1178                          */
1179                         next_reclaimed = ssn;
1180                 }
1181
1182                 if (tid != IWL_TID_NON_QOS) {
1183                         priv->tid_data[sta_id][tid].next_reclaimed =
1184                                 next_reclaimed;
1185                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1186                                                   next_reclaimed);
1187                         iwlagn_check_ratid_empty(priv, sta_id, tid);
1188                 }
1189
1190                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1191
1192                 freed = 0;
1193
1194                 /* process frames */
1195                 skb_queue_walk(&skbs, skb) {
1196                         hdr = (struct ieee80211_hdr *)skb->data;
1197
1198                         if (!ieee80211_is_data_qos(hdr->frame_control))
1199                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1200
1201                         info = IEEE80211_SKB_CB(skb);
1202                         ctx = info->driver_data[0];
1203                         iwl_trans_free_tx_cmd(priv->trans,
1204                                               info->driver_data[1]);
1205
1206                         memset(&info->status, 0, sizeof(info->status));
1207
1208                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1209                             ctx->vif &&
1210                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1211                                 /* block and stop all queues */
1212                                 priv->passive_no_rx = true;
1213                                 IWL_DEBUG_TX_QUEUES(priv,
1214                                         "stop all queues: passive channel\n");
1215                                 ieee80211_stop_queues(priv->hw);
1216
1217                                 IWL_DEBUG_TX_REPLY(priv,
1218                                            "TXQ %d status %s (0x%08x) "
1219                                            "rate_n_flags 0x%x retries %d\n",
1220                                            txq_id,
1221                                            iwl_get_tx_fail_reason(status),
1222                                            status,
1223                                            le32_to_cpu(tx_resp->rate_n_flags),
1224                                            tx_resp->failure_frame);
1225
1226                                 IWL_DEBUG_TX_REPLY(priv,
1227                                            "FrameCnt = %d, idx=%d\n",
1228                                            tx_resp->frame_count, cmd_index);
1229                         }
1230
1231                         /* check if BAR is needed */
1232                         if (is_agg && !iwl_is_tx_success(status))
1233                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1234                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1235                                      tx_resp);
1236                         if (!is_agg)
1237                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1238
1239                         freed++;
1240                 }
1241
1242                 if (tid != IWL_TID_NON_QOS) {
1243                         priv->tid_data[sta_id][tid].next_reclaimed =
1244                                 next_reclaimed;
1245                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1246                                            next_reclaimed);
1247                 }
1248
1249                 if (!is_agg && freed != 1)
1250                         IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1251
1252                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1253                                    iwl_get_tx_fail_reason(status), status);
1254
1255                 IWL_DEBUG_TX_REPLY(priv,
1256                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1257                                    le32_to_cpu(tx_resp->rate_n_flags),
1258                                    tx_resp->failure_frame,
1259                                    SEQ_TO_INDEX(sequence), ssn,
1260                                    le16_to_cpu(tx_resp->seq_ctl));
1261         }
1262
1263         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1264         spin_unlock_bh(&priv->sta_lock);
1265
1266         while (!skb_queue_empty(&skbs)) {
1267                 skb = __skb_dequeue(&skbs);
1268                 ieee80211_tx_status(priv->hw, skb);
1269         }
1270 }
1271
1272 /**
1273  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1274  *
1275  * Handles block-acknowledge notification from device, which reports success
1276  * of frames sent via aggregation.
1277  */
1278 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1279                                    struct iwl_rx_cmd_buffer *rxb)
1280 {
1281         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1282         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1283         struct iwl_ht_agg *agg;
1284         struct sk_buff_head reclaimed_skbs;
1285         struct sk_buff *skb;
1286         int sta_id;
1287         int tid;
1288         int freed;
1289
1290         /* "flow" corresponds to Tx queue */
1291         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1292
1293         /* "ssn" is start of block-ack Tx window, corresponds to index
1294          * (in Tx queue's circular buffer) of first TFD/frame in window */
1295         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1296
1297         if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1298                 IWL_ERR(priv,
1299                         "BUG_ON scd_flow is bigger than number of queues\n");
1300                 return;
1301         }
1302
1303         sta_id = ba_resp->sta_id;
1304         tid = ba_resp->tid;
1305         agg = &priv->tid_data[sta_id][tid].agg;
1306
1307         spin_lock_bh(&priv->sta_lock);
1308
1309         if (unlikely(!agg->wait_for_ba)) {
1310                 if (unlikely(ba_resp->bitmap))
1311                         IWL_ERR(priv, "Received BA when not expected\n");
1312                 spin_unlock_bh(&priv->sta_lock);
1313                 return;
1314         }
1315
1316         if (unlikely(scd_flow != agg->txq_id)) {
1317                 /*
1318                  * FIXME: this is a uCode bug which need to be addressed,
1319                  * log the information and return for now.
1320                  * Since it is can possibly happen very often and in order
1321                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1322                  */
1323                 IWL_DEBUG_TX_QUEUES(priv,
1324                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1325                                     scd_flow, sta_id, tid, agg->txq_id);
1326                 spin_unlock_bh(&priv->sta_lock);
1327                 return;
1328         }
1329
1330         __skb_queue_head_init(&reclaimed_skbs);
1331
1332         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1333          * block-ack window (we assume that they've been successfully
1334          * transmitted ... if not, it's too late anyway). */
1335         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1336                           &reclaimed_skbs);
1337
1338         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1339                            "sta_id = %d\n",
1340                            agg->wait_for_ba,
1341                            (u8 *) &ba_resp->sta_addr_lo32,
1342                            ba_resp->sta_id);
1343         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1344                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1345                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1346                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1347                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1348                            ba_resp->txed_2_done);
1349
1350         /* Mark that the expected block-ack response arrived */
1351         agg->wait_for_ba = false;
1352
1353         /* Sanity check values reported by uCode */
1354         if (ba_resp->txed_2_done > ba_resp->txed) {
1355                 IWL_DEBUG_TX_REPLY(priv,
1356                         "bogus sent(%d) and ack(%d) count\n",
1357                         ba_resp->txed, ba_resp->txed_2_done);
1358                 /*
1359                  * set txed_2_done = txed,
1360                  * so it won't impact rate scale
1361                  */
1362                 ba_resp->txed = ba_resp->txed_2_done;
1363         }
1364
1365         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1366
1367         iwlagn_check_ratid_empty(priv, sta_id, tid);
1368         freed = 0;
1369
1370         skb_queue_walk(&reclaimed_skbs, skb) {
1371                 struct ieee80211_hdr *hdr = (void *)skb->data;
1372                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1373
1374                 if (ieee80211_is_data_qos(hdr->frame_control))
1375                         freed++;
1376                 else
1377                         WARN_ON_ONCE(1);
1378
1379                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1380
1381                 memset(&info->status, 0, sizeof(info->status));
1382                 /* Packet was transmitted successfully, failures come as single
1383                  * frames because before failing a frame the firmware transmits
1384                  * it without aggregation at least once.
1385                  */
1386                 info->flags |= IEEE80211_TX_STAT_ACK;
1387
1388                 if (freed == 1) {
1389                         /* this is the first skb we deliver in this batch */
1390                         /* put the rate scaling data there */
1391                         info = IEEE80211_SKB_CB(skb);
1392                         memset(&info->status, 0, sizeof(info->status));
1393                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1394                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1395                         info->status.ampdu_len = ba_resp->txed;
1396                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1397                                                     info);
1398                 }
1399         }
1400
1401         spin_unlock_bh(&priv->sta_lock);
1402
1403         while (!skb_queue_empty(&reclaimed_skbs)) {
1404                 skb = __skb_dequeue(&reclaimed_skbs);
1405                 ieee80211_tx_status(priv->hw, skb);
1406         }
1407 }