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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2013 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  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called COPYING.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/sched.h>
  34 #include <linux/ieee80211.h>
  35 #include "iwl-io.h"
  36 #include "iwl-trans.h"
  37 #include "iwl-agn-hw.h"
  38 #include "dev.h"
  39 #include "agn.h"
  40
  41 static const u8 tid_to_ac[] = {
  42         IEEE80211_AC_BE,
  43         IEEE80211_AC_BK,
  44         IEEE80211_AC_BK,
  45         IEEE80211_AC_BE,
  46         IEEE80211_AC_VI,
  47         IEEE80211_AC_VI,
  48         IEEE80211_AC_VO,
  49         IEEE80211_AC_VO,
  50 };
  51
  52 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
  53                                      struct ieee80211_tx_info *info,
  54                                      __le16 fc, __le32 *tx_flags)
  55 {
  56         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
  57             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
  58             info->flags & IEEE80211_TX_CTL_AMPDU)
  59                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
  60 }
  61
  62 /*
  63  * handle build REPLY_TX command notification.
  64  */
  65 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
  66                                       struct sk_buff *skb,
  67                                       struct iwl_tx_cmd *tx_cmd,
  68                                       struct ieee80211_tx_info *info,
  69                                       struct ieee80211_hdr *hdr, u8 sta_id)
  70 {
  71         __le16 fc = hdr->frame_control;
  72         __le32 tx_flags = tx_cmd->tx_flags;
  73
  74         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
  75
  76         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  77                 tx_flags |= TX_CMD_FLG_ACK_MSK;
  78         else
  79                 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
  80
  81         if (ieee80211_is_probe_resp(fc))
  82                 tx_flags |= TX_CMD_FLG_TSF_MSK;
  83         else if (ieee80211_is_back_req(fc))
  84                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
  85         else if (info->band == IEEE80211_BAND_2GHZ &&
  86                  priv->cfg->bt_params &&
  87                  priv->cfg->bt_params->advanced_bt_coexist &&
  88                  (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
  89                  ieee80211_is_reassoc_req(fc) ||
  90                  skb->protocol == cpu_to_be16(ETH_P_PAE)))
  91                 tx_flags |= TX_CMD_FLG_IGNORE_BT;
  92
  93
  94         tx_cmd->sta_id = sta_id;
  95         if (ieee80211_has_morefrags(fc))
  96                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
  97
  98         if (ieee80211_is_data_qos(fc)) {
  99                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 100                 tx_cmd->tid_tspec = qc[0] & 0xf;
 101                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 102         } else {
 103                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 104                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 105                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 106                 else
 107                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 108         }
 109
 110         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
 111
 112         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 113         if (ieee80211_is_mgmt(fc)) {
 114                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 115                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 116                 else
 117                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 118         } else {
 119                 tx_cmd->timeout.pm_frame_timeout = 0;
 120         }
 121
 122         tx_cmd->driver_txop = 0;
 123         tx_cmd->tx_flags = tx_flags;
 124         tx_cmd->next_frame_len = 0;
 125 }
 126
 127 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 128                                      struct iwl_tx_cmd *tx_cmd,
 129                                      struct ieee80211_tx_info *info,
 130                                      struct ieee80211_sta *sta,
 131                                      __le16 fc)
 132 {
 133         u32 rate_flags;
 134         int rate_idx;
 135         u8 rts_retry_limit;
 136         u8 data_retry_limit;
 137         u8 rate_plcp;
 138
 139         if (priv->wowlan) {
 140                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 141                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 142         } else {
 143                 /* Set retry limit on RTS packets */
 144                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 145
 146                 /* Set retry limit on DATA packets and Probe Responses*/
 147                 if (ieee80211_is_probe_resp(fc)) {
 148                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 149                         rts_retry_limit =
 150                                 min(data_retry_limit, rts_retry_limit);
 151                 } else if (ieee80211_is_back_req(fc))
 152                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 153                 else
 154                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 155         }
 156
 157         tx_cmd->data_retry_limit = data_retry_limit;
 158         tx_cmd->rts_retry_limit = rts_retry_limit;
 159
 160         /* DATA packets will use the uCode station table for rate/antenna
 161          * selection */
 162         if (ieee80211_is_data(fc)) {
 163                 tx_cmd->initial_rate_index = 0;
 164                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 165 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
 166                 if (priv->tm_fixed_rate) {
 167                         /*
 168                          * rate overwrite by testmode
 169                          * we not only send lq command to change rate
 170                          * we also re-enforce per data pkt base.
 171                          */
 172                         tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
 173                         memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
 174                                sizeof(tx_cmd->rate_n_flags));
 175                 }
 176 #endif
 177                 return;
 178         } else if (ieee80211_is_back_req(fc))
 179                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 180
 181         /**
 182          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 183          * not really a TX rate.  Thus, we use the lowest supported rate for
 184          * this band.  Also use the lowest supported rate if the stored rate
 185          * index is invalid.
 186          */
 187         rate_idx = info->control.rates[0].idx;
 188         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 189                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 190                 rate_idx = rate_lowest_index(
 191                                 &priv->nvm_data->bands[info->band], sta);
 192         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 193         if (info->band == IEEE80211_BAND_5GHZ)
 194                 rate_idx += IWL_FIRST_OFDM_RATE;
 195         /* Get PLCP rate for tx_cmd->rate_n_flags */
 196         rate_plcp = iwl_rates[rate_idx].plcp;
 197         /* Zero out flags for this packet */
 198         rate_flags = 0;
 199
 200         /* Set CCK flag as needed */
 201         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 202                 rate_flags |= RATE_MCS_CCK_MSK;
 203
 204         /* Set up antennas */
 205          if (priv->cfg->bt_params &&
 206              priv->cfg->bt_params->advanced_bt_coexist &&
 207              priv->bt_full_concurrent) {
 208                 /* operated as 1x1 in full concurrency mode */
 209                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 210                                 first_antenna(priv->nvm_data->valid_tx_ant));
 211         } else
 212                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
 213                                         priv, priv->mgmt_tx_ant,
 214                                         priv->nvm_data->valid_tx_ant);
 215         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 216
 217         /* Set the rate in the TX cmd */
 218         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 219 }
 220
 221 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 222                                          struct ieee80211_tx_info *info,
 223                                          struct iwl_tx_cmd *tx_cmd,
 224                                          struct sk_buff *skb_frag)
 225 {
 226         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 227
 228         switch (keyconf->cipher) {
 229         case WLAN_CIPHER_SUITE_CCMP:
 230                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 231                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 232                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 233                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 234                 break;
 235
 236         case WLAN_CIPHER_SUITE_TKIP:
 237                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 238                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 239                 break;
 240
 241         case WLAN_CIPHER_SUITE_WEP104:
 242                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 243                 /* fall through */
 244         case WLAN_CIPHER_SUITE_WEP40:
 245                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 246                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 247
 248                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 249
 250                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 251                              "with key %d\n", keyconf->keyidx);
 252                 break;
 253
 254         default:
 255                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 256                 break;
 257         }
 258 }
 259
 260 /**
 261  * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
 262  * @context: the current context
 263  * @sta: mac80211 station
 264  *
 265  * In certain circumstances mac80211 passes a station pointer
 266  * that may be %NULL, for example during TX or key setup. In
 267  * that case, we need to use the broadcast station, so this
 268  * inline wraps that pattern.
 269  */
 270 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
 271                                    struct ieee80211_sta *sta)
 272 {
 273         int sta_id;
 274
 275         if (!sta)
 276                 return context->bcast_sta_id;
 277
 278         sta_id = iwl_sta_id(sta);
 279
 280         /*
 281          * mac80211 should not be passing a partially
 282          * initialised station!
 283          */
 284         WARN_ON(sta_id == IWL_INVALID_STATION);
 285
 286         return sta_id;
 287 }
 288
 289 /*
 290  * start REPLY_TX command process
 291  */
 292 int iwlagn_tx_skb(struct iwl_priv *priv,
 293                   struct ieee80211_sta *sta,
 294                   struct sk_buff *skb)
 295 {
 296         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 297         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 298         struct iwl_station_priv *sta_priv = NULL;
 299         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 300         struct iwl_device_cmd *dev_cmd;
 301         struct iwl_tx_cmd *tx_cmd;
 302         __le16 fc;
 303         u8 hdr_len;
 304         u16 len, seq_number = 0;
 305         u8 sta_id, tid = IWL_MAX_TID_COUNT;
 306         bool is_agg = false, is_data_qos = false;
 307         int txq_id;
 308
 309         if (info->control.vif)
 310                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 311
 312         if (iwl_is_rfkill(priv)) {
 313                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 314                 goto drop_unlock_priv;
 315         }
 316
 317         fc = hdr->frame_control;
 318
 319 #ifdef CONFIG_IWLWIFI_DEBUG
 320         if (ieee80211_is_auth(fc))
 321                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 322         else if (ieee80211_is_assoc_req(fc))
 323                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 324         else if (ieee80211_is_reassoc_req(fc))
 325                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 326 #endif
 327
 328         if (unlikely(ieee80211_is_probe_resp(fc))) {
 329                 struct iwl_wipan_noa_data *noa_data =
 330                         rcu_dereference(priv->noa_data);
 331
 332                 if (noa_data &&
 333                     pskb_expand_head(skb, 0, noa_data->length,
 334                                      GFP_ATOMIC) == 0) {
 335                         memcpy(skb_put(skb, noa_data->length),
 336                                noa_data->data, noa_data->length);
 337                         hdr = (struct ieee80211_hdr *)skb->data;
 338                 }
 339         }
 340
 341         hdr_len = ieee80211_hdrlen(fc);
 342
 343         /* For management frames use broadcast id to do not break aggregation */
 344         if (!ieee80211_is_data(fc))
 345                 sta_id = ctx->bcast_sta_id;
 346         else {
 347                 /* Find index into station table for destination station */
 348                 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
 349                 if (sta_id == IWL_INVALID_STATION) {
 350                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 351                                        hdr->addr1);
 352                         goto drop_unlock_priv;
 353                 }
 354         }
 355
 356         if (sta)
 357                 sta_priv = (void *)sta->drv_priv;
 358
 359         if (sta_priv && sta_priv->asleep &&
 360             (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
 361                 /*
 362                  * This sends an asynchronous command to the device,
 363                  * but we can rely on it being processed before the
 364                  * next frame is processed -- and the next frame to
 365                  * this station is the one that will consume this
 366                  * counter.
 367                  * For now set the counter to just 1 since we do not
 368                  * support uAPSD yet.
 369                  *
 370                  * FIXME: If we get two non-bufferable frames one
 371                  * after the other, we might only send out one of
 372                  * them because this is racy.
 373                  */
 374                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 375         }
 376
 377         dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
 378
 379         if (unlikely(!dev_cmd))
 380                 goto drop_unlock_priv;
 381
 382         memset(dev_cmd, 0, sizeof(*dev_cmd));
 383         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 384
 385         /* Total # bytes to be transmitted */
 386         len = (u16)skb->len;
 387         tx_cmd->len = cpu_to_le16(len);
 388
 389         if (info->control.hw_key)
 390                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
 391
 392         /* TODO need this for burst mode later on */
 393         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 394
 395         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
 396
 397         memset(&info->status, 0, sizeof(info->status));
 398
 399         info->driver_data[0] = ctx;
 400         info->driver_data[1] = dev_cmd;
 401         /* From now on, we cannot access info->control */
 402
 403         spin_lock(&priv->sta_lock);
 404
 405         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
 406                 u8 *qc = NULL;
 407                 struct iwl_tid_data *tid_data;
 408                 qc = ieee80211_get_qos_ctl(hdr);
 409                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 410                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 411                         goto drop_unlock_sta;
 412                 tid_data = &priv->tid_data[sta_id][tid];
 413
 414                 /* aggregation is on for this <sta,tid> */
 415                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 416                     tid_data->agg.state != IWL_AGG_ON) {
 417                         IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
 418                                 " Tx flags = 0x%08x, agg.state = %d",
 419                                 info->flags, tid_data->agg.state);
 420                         IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
 421                                 sta_id, tid,
 422                                 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
 423                         goto drop_unlock_sta;
 424                 }
 425
 426                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 427                  * only. Check this here.
 428                  */
 429                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 430                               tid_data->agg.state != IWL_AGG_OFF,
 431                     "Tx while agg.state = %d", tid_data->agg.state))
 432                         goto drop_unlock_sta;
 433
 434                 seq_number = tid_data->seq_number;
 435                 seq_number &= IEEE80211_SCTL_SEQ;
 436                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 437                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 438                 seq_number += 0x10;
 439
 440                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 441                         is_agg = true;
 442                 is_data_qos = true;
 443         }
 444
 445         /* Copy MAC header from skb into command buffer */
 446         memcpy(tx_cmd->hdr, hdr, hdr_len);
 447
 448         if (is_agg)
 449                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 450         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 451                 /*
 452                  * Send this frame after DTIM -- there's a special queue
 453                  * reserved for this for contexts that support AP mode.
 454                  */
 455                 txq_id = ctx->mcast_queue;
 456
 457                 /*
 458                  * The microcode will clear the more data
 459                  * bit in the last frame it transmits.
 460                  */
 461                 hdr->frame_control |=
 462                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 463         } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
 464                 txq_id = IWL_AUX_QUEUE;
 465         else
 466                 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
 467
 468         WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
 469         WARN_ON_ONCE(is_agg &&
 470                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 471
 472         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 473                      txq_id, seq_number);
 474
 475         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 476                 goto drop_unlock_sta;
 477
 478         if (is_data_qos && !ieee80211_has_morefrags(fc))
 479                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 480
 481         spin_unlock(&priv->sta_lock);
 482
 483         /*
 484          * Avoid atomic ops if it isn't an associated client.
 485          * Also, if this is a packet for aggregation, don't
 486          * increase the counter because the ucode will stop
 487          * aggregation queues when their respective station
 488          * goes to sleep.
 489          */
 490         if (sta_priv && sta_priv->client && !is_agg)
 491                 atomic_inc(&sta_priv->pending_frames);
 492
 493         if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
 494                 iwl_scan_offchannel_skb(priv);
 495
 496         return 0;
 497
 498 drop_unlock_sta:
 499         if (dev_cmd)
 500                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 501         spin_unlock(&priv->sta_lock);
 502 drop_unlock_priv:
 503         return -1;
 504 }
 505
 506 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 507 {
 508         int q;
 509
 510         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 511              q < priv->cfg->base_params->num_of_queues; q++) {
 512                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 513                         priv->queue_to_mac80211[q] = mq;
 514                         return q;
 515                 }
 516         }
 517
 518         return -ENOSPC;
 519 }
 520
 521 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 522 {
 523         clear_bit(q, priv->agg_q_alloc);
 524         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 525 }
 526
 527 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 528                         struct ieee80211_sta *sta, u16 tid)
 529 {
 530         struct iwl_tid_data *tid_data;
 531         int sta_id, txq_id;
 532         enum iwl_agg_state agg_state;
 533
 534         sta_id = iwl_sta_id(sta);
 535
 536         if (sta_id == IWL_INVALID_STATION) {
 537                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 538                 return -ENXIO;
 539         }
 540
 541         spin_lock_bh(&priv->sta_lock);
 542
 543         tid_data = &priv->tid_data[sta_id][tid];
 544         txq_id = tid_data->agg.txq_id;
 545
 546         switch (tid_data->agg.state) {
 547         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 548                 /*
 549                 * This can happen if the peer stops aggregation
 550                 * again before we've had a chance to drain the
 551                 * queue we selected previously, i.e. before the
 552                 * session was really started completely.
 553                 */
 554                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 555                 goto turn_off;
 556         case IWL_AGG_STARTING:
 557                 /*
 558                  * This can happen when the session is stopped before
 559                  * we receive ADDBA response
 560                  */
 561                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 562                 goto turn_off;
 563         case IWL_AGG_ON:
 564                 break;
 565         default:
 566                 IWL_WARN(priv,
 567                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 568                          sta_id, tid, tid_data->agg.state);
 569                 spin_unlock_bh(&priv->sta_lock);
 570                 return 0;
 571         }
 572
 573         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 574
 575         /* There are still packets for this RA / TID in the HW */
 576         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 577                 IWL_DEBUG_TX_QUEUES(priv,
 578                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 579                         sta_id, tid, txq_id);
 580         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 581                 IWL_DEBUG_TX_QUEUES(priv,
 582                                     "Can't proceed: ssn %d, next_recl = %d\n",
 583                                     tid_data->agg.ssn,
 584                                     tid_data->next_reclaimed);
 585                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 586                 spin_unlock_bh(&priv->sta_lock);
 587                 return 0;
 588         }
 589
 590         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 591                             tid_data->agg.ssn);
 592 turn_off:
 593         agg_state = tid_data->agg.state;
 594         tid_data->agg.state = IWL_AGG_OFF;
 595
 596         spin_unlock_bh(&priv->sta_lock);
 597
 598         if (test_bit(txq_id, priv->agg_q_alloc)) {
 599                 /*
 600                  * If the transport didn't know that we wanted to start
 601                  * agreggation, don't tell it that we want to stop them.
 602                  * This can happen when we don't get the addBA response on
 603                  * time, or we hadn't time to drain the AC queues.
 604                  */
 605                 if (agg_state == IWL_AGG_ON)
 606                         iwl_trans_txq_disable(priv->trans, txq_id);
 607                 else
 608                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 609                                             agg_state);
 610                 iwlagn_dealloc_agg_txq(priv, txq_id);
 611         }
 612
 613         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 614
 615         return 0;
 616 }
 617
 618 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 619                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 620 {
 621         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 622         struct iwl_tid_data *tid_data;
 623         int sta_id, txq_id, ret;
 624
 625         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 626                      sta->addr, tid);
 627
 628         sta_id = iwl_sta_id(sta);
 629         if (sta_id == IWL_INVALID_STATION) {
 630                 IWL_ERR(priv, "Start AGG on invalid station\n");
 631                 return -ENXIO;
 632         }
 633         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 634                 return -EINVAL;
 635
 636         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 637                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 638                 return -ENXIO;
 639         }
 640
 641         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 642         if (txq_id < 0) {
 643                 IWL_DEBUG_TX_QUEUES(priv,
 644                         "No free aggregation queue for %pM/%d\n",
 645                         sta->addr, tid);
 646                 return txq_id;
 647         }
 648
 649         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 650         if (ret)
 651                 return ret;
 652
 653         spin_lock_bh(&priv->sta_lock);
 654         tid_data = &priv->tid_data[sta_id][tid];
 655         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 656         tid_data->agg.txq_id = txq_id;
 657
 658         *ssn = tid_data->agg.ssn;
 659
 660         if (*ssn == tid_data->next_reclaimed) {
 661                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 662                                     tid_data->agg.ssn);
 663                 tid_data->agg.state = IWL_AGG_STARTING;
 664                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 665         } else {
 666                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 667                                     "next_reclaimed = %d\n",
 668                                     tid_data->agg.ssn,
 669                                     tid_data->next_reclaimed);
 670                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 671         }
 672         spin_unlock_bh(&priv->sta_lock);
 673
 674         return ret;
 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);
 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 ="
 760                                 " %d", tid_data->next_reclaimed);
 761                         iwl_trans_txq_disable(priv->trans,
 762                                               tid_data->agg.txq_id);
 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 ="
 773                                 " %d", 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->cfg->bt_params &&
 945             priv->cfg->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 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1110                                struct iwl_device_cmd *cmd)
1111 {
1112         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1113         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1114         int txq_id = SEQ_TO_QUEUE(sequence);
1115         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1116         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1117         struct ieee80211_hdr *hdr;
1118         u32 status = le16_to_cpu(tx_resp->status.status);
1119         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1120         int tid;
1121         int sta_id;
1122         int freed;
1123         struct ieee80211_tx_info *info;
1124         struct sk_buff_head skbs;
1125         struct sk_buff *skb;
1126         struct iwl_rxon_context *ctx;
1127         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1128         bool is_offchannel_skb;
1129
1130         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1131                 IWLAGN_TX_RES_TID_POS;
1132         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1133                 IWLAGN_TX_RES_RA_POS;
1134
1135         spin_lock_bh(&priv->sta_lock);
1136
1137         if (is_agg) {
1138                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1139                              tid >= IWL_MAX_TID_COUNT);
1140                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1141                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1142                                 priv->tid_data[sta_id][tid].agg.txq_id);
1143                 iwl_rx_reply_tx_agg(priv, tx_resp);
1144         }
1145
1146         __skb_queue_head_init(&skbs);
1147
1148         is_offchannel_skb = false;
1149
1150         if (tx_resp->frame_count == 1) {
1151                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1152                 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1153
1154                 if (is_agg) {
1155                         /* If this is an aggregation queue, we can rely on the
1156                          * ssn since the wifi sequence number corresponds to
1157                          * the index in the TFD ring (%256).
1158                          * The seq_ctl is the sequence control of the packet
1159                          * to which this Tx response relates. But if there is a
1160                          * hole in the bitmap of the BA we received, this Tx
1161                          * response may allow to reclaim the hole and all the
1162                          * subsequent packets that were already acked.
1163                          * In that case, seq_ctl != ssn, and the next packet
1164                          * to be reclaimed will be ssn and not seq_ctl.
1165                          */
1166                         next_reclaimed = ssn;
1167                 }
1168
1169                 if (tid != IWL_TID_NON_QOS) {
1170                         priv->tid_data[sta_id][tid].next_reclaimed =
1171                                 next_reclaimed;
1172                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1173                                                   next_reclaimed);
1174                 }
1175
1176                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1177
1178                 iwlagn_check_ratid_empty(priv, sta_id, tid);
1179                 freed = 0;
1180
1181                 /* process frames */
1182                 skb_queue_walk(&skbs, skb) {
1183                         hdr = (struct ieee80211_hdr *)skb->data;
1184
1185                         if (!ieee80211_is_data_qos(hdr->frame_control))
1186                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1187
1188                         info = IEEE80211_SKB_CB(skb);
1189                         ctx = info->driver_data[0];
1190                         iwl_trans_free_tx_cmd(priv->trans,
1191                                               info->driver_data[1]);
1192
1193                         memset(&info->status, 0, sizeof(info->status));
1194
1195                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1196                             ctx->vif &&
1197                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1198                                 /* block and stop all queues */
1199                                 priv->passive_no_rx = true;
1200                                 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1201                                                     "passive channel");
1202                                 ieee80211_stop_queues(priv->hw);
1203
1204                                 IWL_DEBUG_TX_REPLY(priv,
1205                                            "TXQ %d status %s (0x%08x) "
1206                                            "rate_n_flags 0x%x retries %d\n",
1207                                            txq_id,
1208                                            iwl_get_tx_fail_reason(status),
1209                                            status,
1210                                            le32_to_cpu(tx_resp->rate_n_flags),
1211                                            tx_resp->failure_frame);
1212
1213                                 IWL_DEBUG_TX_REPLY(priv,
1214                                            "FrameCnt = %d, idx=%d\n",
1215                                            tx_resp->frame_count, cmd_index);
1216                         }
1217
1218                         /* check if BAR is needed */
1219                         if (is_agg && !iwl_is_tx_success(status))
1220                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1221                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1222                                      tx_resp);
1223                         if (!is_agg)
1224                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1225
1226                         is_offchannel_skb =
1227                                 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1228                         freed++;
1229                 }
1230
1231                 if (tid != IWL_TID_NON_QOS) {
1232                         priv->tid_data[sta_id][tid].next_reclaimed =
1233                                 next_reclaimed;
1234                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1235                                            next_reclaimed);
1236                 }
1237
1238                 if (!is_agg && freed != 1)
1239                         IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1240
1241                 /*
1242                  * An offchannel frame can be send only on the AUX queue, where
1243                  * there is no aggregation (and reordering) so it only is single
1244                  * skb is expected to be processed.
1245                  */
1246                 if (is_offchannel_skb && freed != 1)
1247                         IWL_ERR(priv, "OFFCHANNEL SKB freed %d\n", freed);
1248
1249                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1250                                    iwl_get_tx_fail_reason(status), status);
1251
1252                 IWL_DEBUG_TX_REPLY(priv,
1253                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1254                                    le32_to_cpu(tx_resp->rate_n_flags),
1255                                    tx_resp->failure_frame,
1256                                    SEQ_TO_INDEX(sequence), ssn,
1257                                    le16_to_cpu(tx_resp->seq_ctl));
1258         }
1259
1260         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1261         spin_unlock_bh(&priv->sta_lock);
1262
1263         while (!skb_queue_empty(&skbs)) {
1264                 skb = __skb_dequeue(&skbs);
1265                 ieee80211_tx_status_ni(priv->hw, skb);
1266         }
1267
1268         if (is_offchannel_skb)
1269                 iwl_scan_offchannel_skb_status(priv);
1270
1271         return 0;
1272 }
1273
1274 /**
1275  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1276  *
1277  * Handles block-acknowledge notification from device, which reports success
1278  * of frames sent via aggregation.
1279  */
1280 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1281                                    struct iwl_rx_cmd_buffer *rxb,
1282                                    struct iwl_device_cmd *cmd)
1283 {
1284         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1285         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1286         struct iwl_ht_agg *agg;
1287         struct sk_buff_head reclaimed_skbs;
1288         struct ieee80211_tx_info *info;
1289         struct ieee80211_hdr *hdr;
1290         struct sk_buff *skb;
1291         int sta_id;
1292         int tid;
1293         int freed;
1294
1295         /* "flow" corresponds to Tx queue */
1296         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1297
1298         /* "ssn" is start of block-ack Tx window, corresponds to index
1299          * (in Tx queue's circular buffer) of first TFD/frame in window */
1300         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1301
1302         if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1303                 IWL_ERR(priv,
1304                         "BUG_ON scd_flow is bigger than number of queues\n");
1305                 return 0;
1306         }
1307
1308         sta_id = ba_resp->sta_id;
1309         tid = ba_resp->tid;
1310         agg = &priv->tid_data[sta_id][tid].agg;
1311
1312         spin_lock_bh(&priv->sta_lock);
1313
1314         if (unlikely(!agg->wait_for_ba)) {
1315                 if (unlikely(ba_resp->bitmap))
1316                         IWL_ERR(priv, "Received BA when not expected\n");
1317                 spin_unlock_bh(&priv->sta_lock);
1318                 return 0;
1319         }
1320
1321         if (unlikely(scd_flow != agg->txq_id)) {
1322                 /*
1323                  * FIXME: this is a uCode bug which need to be addressed,
1324                  * log the information and return for now.
1325                  * Since it is can possibly happen very often and in order
1326                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1327                  */
1328                 IWL_DEBUG_TX_QUEUES(priv,
1329                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1330                                     scd_flow, sta_id, tid, agg->txq_id);
1331                 spin_unlock_bh(&priv->sta_lock);
1332                 return 0;
1333         }
1334
1335         __skb_queue_head_init(&reclaimed_skbs);
1336
1337         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1338          * block-ack window (we assume that they've been successfully
1339          * transmitted ... if not, it's too late anyway). */
1340         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1341                           &reclaimed_skbs);
1342
1343         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1344                            "sta_id = %d\n",
1345                            agg->wait_for_ba,
1346                            (u8 *) &ba_resp->sta_addr_lo32,
1347                            ba_resp->sta_id);
1348         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1349                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1350                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1351                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1352                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1353                            ba_resp->txed_2_done);
1354
1355         /* Mark that the expected block-ack response arrived */
1356         agg->wait_for_ba = false;
1357
1358         /* Sanity check values reported by uCode */
1359         if (ba_resp->txed_2_done > ba_resp->txed) {
1360                 IWL_DEBUG_TX_REPLY(priv,
1361                         "bogus sent(%d) and ack(%d) count\n",
1362                         ba_resp->txed, ba_resp->txed_2_done);
1363                 /*
1364                  * set txed_2_done = txed,
1365                  * so it won't impact rate scale
1366                  */
1367                 ba_resp->txed = ba_resp->txed_2_done;
1368         }
1369
1370         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1371
1372         iwlagn_check_ratid_empty(priv, sta_id, tid);
1373         freed = 0;
1374
1375         skb_queue_walk(&reclaimed_skbs, skb) {
1376                 hdr = (struct ieee80211_hdr *)skb->data;
1377
1378                 if (ieee80211_is_data_qos(hdr->frame_control))
1379                         freed++;
1380                 else
1381                         WARN_ON_ONCE(1);
1382
1383                 info = IEEE80211_SKB_CB(skb);
1384                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1385
1386                 if (freed == 1) {
1387                         /* this is the first skb we deliver in this batch */
1388                         /* put the rate scaling data there */
1389                         info = IEEE80211_SKB_CB(skb);
1390                         memset(&info->status, 0, sizeof(info->status));
1391                         info->flags |= IEEE80211_TX_STAT_ACK;
1392                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1393                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1394                         info->status.ampdu_len = ba_resp->txed;
1395                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1396                                                     info);
1397                 }
1398         }
1399
1400         spin_unlock_bh(&priv->sta_lock);
1401
1402         while (!skb_queue_empty(&reclaimed_skbs)) {
1403                 skb = __skb_dequeue(&reclaimed_skbs);
1404                 ieee80211_tx_status_ni(priv->hw, skb);
1405         }
1406
1407         return 0;
1408 }