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 LICENSE.GPL.
  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, SEQ_TO_SN(tid_data->seq_number));
 422                         goto drop_unlock_sta;
 423                 }
 424
 425                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 426                  * only. Check this here.
 427                  */
 428                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 429                               tid_data->agg.state != IWL_AGG_OFF,
 430                     "Tx while agg.state = %d", tid_data->agg.state))
 431                         goto drop_unlock_sta;
 432
 433                 seq_number = tid_data->seq_number;
 434                 seq_number &= IEEE80211_SCTL_SEQ;
 435                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 436                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 437                 seq_number += 0x10;
 438
 439                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 440                         is_agg = true;
 441                 is_data_qos = true;
 442         }
 443
 444         /* Copy MAC header from skb into command buffer */
 445         memcpy(tx_cmd->hdr, hdr, hdr_len);
 446
 447         if (is_agg)
 448                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 449         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 450                 /*
 451                  * Send this frame after DTIM -- there's a special queue
 452                  * reserved for this for contexts that support AP mode.
 453                  */
 454                 txq_id = ctx->mcast_queue;
 455
 456                 /*
 457                  * The microcode will clear the more data
 458                  * bit in the last frame it transmits.
 459                  */
 460                 hdr->frame_control |=
 461                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 462         } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
 463                 txq_id = IWL_AUX_QUEUE;
 464         else
 465                 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
 466
 467         WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
 468         WARN_ON_ONCE(is_agg &&
 469                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 470
 471         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 472                      txq_id, seq_number);
 473
 474         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 475                 goto drop_unlock_sta;
 476
 477         if (is_data_qos && !ieee80211_has_morefrags(fc))
 478                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 479
 480         spin_unlock(&priv->sta_lock);
 481
 482         /*
 483          * Avoid atomic ops if it isn't an associated client.
 484          * Also, if this is a packet for aggregation, don't
 485          * increase the counter because the ucode will stop
 486          * aggregation queues when their respective station
 487          * goes to sleep.
 488          */
 489         if (sta_priv && sta_priv->client && !is_agg)
 490                 atomic_inc(&sta_priv->pending_frames);
 491
 492         if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
 493                 iwl_scan_offchannel_skb(priv);
 494
 495         return 0;
 496
 497 drop_unlock_sta:
 498         if (dev_cmd)
 499                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 500         spin_unlock(&priv->sta_lock);
 501 drop_unlock_priv:
 502         return -1;
 503 }
 504
 505 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 506 {
 507         int q;
 508
 509         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 510              q < priv->cfg->base_params->num_of_queues; q++) {
 511                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 512                         priv->queue_to_mac80211[q] = mq;
 513                         return q;
 514                 }
 515         }
 516
 517         return -ENOSPC;
 518 }
 519
 520 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 521 {
 522         clear_bit(q, priv->agg_q_alloc);
 523         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 524 }
 525
 526 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 527                         struct ieee80211_sta *sta, u16 tid)
 528 {
 529         struct iwl_tid_data *tid_data;
 530         int sta_id, txq_id;
 531         enum iwl_agg_state agg_state;
 532
 533         sta_id = iwl_sta_id(sta);
 534
 535         if (sta_id == IWL_INVALID_STATION) {
 536                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 537                 return -ENXIO;
 538         }
 539
 540         spin_lock_bh(&priv->sta_lock);
 541
 542         tid_data = &priv->tid_data[sta_id][tid];
 543         txq_id = tid_data->agg.txq_id;
 544
 545         switch (tid_data->agg.state) {
 546         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 547                 /*
 548                 * This can happen if the peer stops aggregation
 549                 * again before we've had a chance to drain the
 550                 * queue we selected previously, i.e. before the
 551                 * session was really started completely.
 552                 */
 553                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 554                 goto turn_off;
 555         case IWL_AGG_STARTING:
 556                 /*
 557                  * This can happen when the session is stopped before
 558                  * we receive ADDBA response
 559                  */
 560                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 561                 goto turn_off;
 562         case IWL_AGG_ON:
 563                 break;
 564         default:
 565                 IWL_WARN(priv,
 566                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 567                          sta_id, tid, tid_data->agg.state);
 568                 spin_unlock_bh(&priv->sta_lock);
 569                 return 0;
 570         }
 571
 572         tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
 573
 574         /* There are still packets for this RA / TID in the HW */
 575         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 576                 IWL_DEBUG_TX_QUEUES(priv,
 577                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 578                         sta_id, tid, txq_id);
 579         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 580                 IWL_DEBUG_TX_QUEUES(priv,
 581                                     "Can't proceed: ssn %d, next_recl = %d\n",
 582                                     tid_data->agg.ssn,
 583                                     tid_data->next_reclaimed);
 584                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 585                 spin_unlock_bh(&priv->sta_lock);
 586                 return 0;
 587         }
 588
 589         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 590                             tid_data->agg.ssn);
 591 turn_off:
 592         agg_state = tid_data->agg.state;
 593         tid_data->agg.state = IWL_AGG_OFF;
 594
 595         spin_unlock_bh(&priv->sta_lock);
 596
 597         if (test_bit(txq_id, priv->agg_q_alloc)) {
 598                 /*
 599                  * If the transport didn't know that we wanted to start
 600                  * agreggation, don't tell it that we want to stop them.
 601                  * This can happen when we don't get the addBA response on
 602                  * time, or we hadn't time to drain the AC queues.
 603                  */
 604                 if (agg_state == IWL_AGG_ON)
 605                         iwl_trans_txq_disable(priv->trans, txq_id);
 606                 else
 607                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 608                                             agg_state);
 609                 iwlagn_dealloc_agg_txq(priv, txq_id);
 610         }
 611
 612         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 613
 614         return 0;
 615 }
 616
 617 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 618                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 619 {
 620         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 621         struct iwl_tid_data *tid_data;
 622         int sta_id, txq_id, ret;
 623
 624         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 625                      sta->addr, tid);
 626
 627         sta_id = iwl_sta_id(sta);
 628         if (sta_id == IWL_INVALID_STATION) {
 629                 IWL_ERR(priv, "Start AGG on invalid station\n");
 630                 return -ENXIO;
 631         }
 632         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 633                 return -EINVAL;
 634
 635         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 636                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 637                 return -ENXIO;
 638         }
 639
 640         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 641         if (txq_id < 0) {
 642                 IWL_DEBUG_TX_QUEUES(priv,
 643                         "No free aggregation queue for %pM/%d\n",
 644                         sta->addr, tid);
 645                 return txq_id;
 646         }
 647
 648         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 649         if (ret)
 650                 return ret;
 651
 652         spin_lock_bh(&priv->sta_lock);
 653         tid_data = &priv->tid_data[sta_id][tid];
 654         tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
 655         tid_data->agg.txq_id = txq_id;
 656
 657         *ssn = tid_data->agg.ssn;
 658
 659         if (*ssn == tid_data->next_reclaimed) {
 660                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 661                                     tid_data->agg.ssn);
 662                 tid_data->agg.state = IWL_AGG_STARTING;
 663                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 664         } else {
 665                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 666                                     "next_reclaimed = %d\n",
 667                                     tid_data->agg.ssn,
 668                                     tid_data->next_reclaimed);
 669                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 670         }
 671         spin_unlock_bh(&priv->sta_lock);
 672
 673         return ret;
 674 }
 675
 676 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 677                         struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 678 {
 679         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 680         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 681         int q, fifo;
 682         u16 ssn;
 683
 684         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 685
 686         spin_lock_bh(&priv->sta_lock);
 687         ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
 688         q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
 689         priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
 690         spin_unlock_bh(&priv->sta_lock);
 691
 692         fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
 693
 694         iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
 695                              buf_size, ssn);
 696
 697         /*
 698          * If the limit is 0, then it wasn't initialised yet,
 699          * use the default. We can do that since we take the
 700          * minimum below, and we don't want to go above our
 701          * default due to hardware restrictions.
 702          */
 703         if (sta_priv->max_agg_bufsize == 0)
 704                 sta_priv->max_agg_bufsize =
 705                         LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 706
 707         /*
 708          * Even though in theory the peer could have different
 709          * aggregation reorder buffer sizes for different sessions,
 710          * our ucode doesn't allow for that and has a global limit
 711          * for each station. Therefore, use the minimum of all the
 712          * aggregation sessions and our default value.
 713          */
 714         sta_priv->max_agg_bufsize =
 715                 min(sta_priv->max_agg_bufsize, buf_size);
 716
 717         if (priv->hw_params.use_rts_for_aggregation) {
 718                 /*
 719                  * switch to RTS/CTS if it is the prefer protection
 720                  * method for HT traffic
 721                  */
 722
 723                 sta_priv->lq_sta.lq.general_params.flags |=
 724                         LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 725         }
 726         priv->agg_tids_count++;
 727         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 728                      priv->agg_tids_count);
 729
 730         sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 731                 sta_priv->max_agg_bufsize;
 732
 733         IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 734                  sta->addr, tid);
 735
 736         return iwl_send_lq_cmd(priv, ctx,
 737                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 738 }
 739
 740 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
 741 {
 742         struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
 743         enum iwl_rxon_context_id ctx;
 744         struct ieee80211_vif *vif;
 745         u8 *addr;
 746
 747         lockdep_assert_held(&priv->sta_lock);
 748
 749         addr = priv->stations[sta_id].sta.sta.addr;
 750         ctx = priv->stations[sta_id].ctxid;
 751         vif = priv->contexts[ctx].vif;
 752
 753         switch (priv->tid_data[sta_id][tid].agg.state) {
 754         case IWL_EMPTYING_HW_QUEUE_DELBA:
 755                 /* There are no packets for this RA / TID in the HW any more */
 756                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 757                         IWL_DEBUG_TX_QUEUES(priv,
 758                                 "Can continue DELBA flow ssn = next_recl ="
 759                                 " %d", tid_data->next_reclaimed);
 760                         iwl_trans_txq_disable(priv->trans,
 761                                               tid_data->agg.txq_id);
 762                         iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
 763                         tid_data->agg.state = IWL_AGG_OFF;
 764                         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 765                 }
 766                 break;
 767         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 768                 /* There are no packets for this RA / TID in the HW any more */
 769                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 770                         IWL_DEBUG_TX_QUEUES(priv,
 771                                 "Can continue ADDBA flow ssn = next_recl ="
 772                                 " %d", tid_data->next_reclaimed);
 773                         tid_data->agg.state = IWL_AGG_STARTING;
 774                         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
 775                 }
 776                 break;
 777         default:
 778                 break;
 779         }
 780 }
 781
 782 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 783                                      struct iwl_rxon_context *ctx,
 784                                      const u8 *addr1)
 785 {
 786         struct ieee80211_sta *sta;
 787         struct iwl_station_priv *sta_priv;
 788
 789         rcu_read_lock();
 790         sta = ieee80211_find_sta(ctx->vif, addr1);
 791         if (sta) {
 792                 sta_priv = (void *)sta->drv_priv;
 793                 /* avoid atomic ops if this isn't a client */
 794                 if (sta_priv->client &&
 795                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 796                         ieee80211_sta_block_awake(priv->hw, sta, false);
 797         }
 798         rcu_read_unlock();
 799 }
 800
 801 /**
 802  * translate ucode response to mac80211 tx status control values
 803  */
 804 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 805                                   struct ieee80211_tx_info *info)
 806 {
 807         struct ieee80211_tx_rate *r = &info->status.rates[0];
 808
 809         info->status.antenna =
 810                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 811         if (rate_n_flags & RATE_MCS_HT_MSK)
 812                 r->flags |= IEEE80211_TX_RC_MCS;
 813         if (rate_n_flags & RATE_MCS_GF_MSK)
 814                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 815         if (rate_n_flags & RATE_MCS_HT40_MSK)
 816                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 817         if (rate_n_flags & RATE_MCS_DUP_MSK)
 818                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 819         if (rate_n_flags & RATE_MCS_SGI_MSK)
 820                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 821         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 822 }
 823
 824 #ifdef CONFIG_IWLWIFI_DEBUG
 825 const char *iwl_get_tx_fail_reason(u32 status)
 826 {
 827 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 828 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 829
 830         switch (status & TX_STATUS_MSK) {
 831         case TX_STATUS_SUCCESS:
 832                 return "SUCCESS";
 833         TX_STATUS_POSTPONE(DELAY);
 834         TX_STATUS_POSTPONE(FEW_BYTES);
 835         TX_STATUS_POSTPONE(BT_PRIO);
 836         TX_STATUS_POSTPONE(QUIET_PERIOD);
 837         TX_STATUS_POSTPONE(CALC_TTAK);
 838         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 839         TX_STATUS_FAIL(SHORT_LIMIT);
 840         TX_STATUS_FAIL(LONG_LIMIT);
 841         TX_STATUS_FAIL(FIFO_UNDERRUN);
 842         TX_STATUS_FAIL(DRAIN_FLOW);
 843         TX_STATUS_FAIL(RFKILL_FLUSH);
 844         TX_STATUS_FAIL(LIFE_EXPIRE);
 845         TX_STATUS_FAIL(DEST_PS);
 846         TX_STATUS_FAIL(HOST_ABORTED);
 847         TX_STATUS_FAIL(BT_RETRY);
 848         TX_STATUS_FAIL(STA_INVALID);
 849         TX_STATUS_FAIL(FRAG_DROPPED);
 850         TX_STATUS_FAIL(TID_DISABLE);
 851         TX_STATUS_FAIL(FIFO_FLUSHED);
 852         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 853         TX_STATUS_FAIL(PASSIVE_NO_RX);
 854         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 855         }
 856
 857         return "UNKNOWN";
 858
 859 #undef TX_STATUS_FAIL
 860 #undef TX_STATUS_POSTPONE
 861 }
 862 #endif /* CONFIG_IWLWIFI_DEBUG */
 863
 864 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 865 {
 866         status &= AGG_TX_STATUS_MSK;
 867
 868         switch (status) {
 869         case AGG_TX_STATE_UNDERRUN_MSK:
 870                 priv->reply_agg_tx_stats.underrun++;
 871                 break;
 872         case AGG_TX_STATE_BT_PRIO_MSK:
 873                 priv->reply_agg_tx_stats.bt_prio++;
 874                 break;
 875         case AGG_TX_STATE_FEW_BYTES_MSK:
 876                 priv->reply_agg_tx_stats.few_bytes++;
 877                 break;
 878         case AGG_TX_STATE_ABORT_MSK:
 879                 priv->reply_agg_tx_stats.abort++;
 880                 break;
 881         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 882                 priv->reply_agg_tx_stats.last_sent_ttl++;
 883                 break;
 884         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 885                 priv->reply_agg_tx_stats.last_sent_try++;
 886                 break;
 887         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 888                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 889                 break;
 890         case AGG_TX_STATE_SCD_QUERY_MSK:
 891                 priv->reply_agg_tx_stats.scd_query++;
 892                 break;
 893         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 894                 priv->reply_agg_tx_stats.bad_crc32++;
 895                 break;
 896         case AGG_TX_STATE_RESPONSE_MSK:
 897                 priv->reply_agg_tx_stats.response++;
 898                 break;
 899         case AGG_TX_STATE_DUMP_TX_MSK:
 900                 priv->reply_agg_tx_stats.dump_tx++;
 901                 break;
 902         case AGG_TX_STATE_DELAY_TX_MSK:
 903                 priv->reply_agg_tx_stats.delay_tx++;
 904                 break;
 905         default:
 906                 priv->reply_agg_tx_stats.unknown++;
 907                 break;
 908         }
 909 }
 910
 911 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 912 {
 913         return le32_to_cpup((__le32 *)&tx_resp->status +
 914                             tx_resp->frame_count) & MAX_SN;
 915 }
 916
 917 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 918                                 struct iwlagn_tx_resp *tx_resp)
 919 {
 920         struct agg_tx_status *frame_status = &tx_resp->status;
 921         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 922                 IWLAGN_TX_RES_TID_POS;
 923         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 924                 IWLAGN_TX_RES_RA_POS;
 925         struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
 926         u32 status = le16_to_cpu(tx_resp->status.status);
 927         int i;
 928
 929         WARN_ON(tid == IWL_TID_NON_QOS);
 930
 931         if (agg->wait_for_ba)
 932                 IWL_DEBUG_TX_REPLY(priv,
 933                         "got tx response w/o block-ack\n");
 934
 935         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 936         agg->wait_for_ba = (tx_resp->frame_count > 1);
 937
 938         /*
 939          * If the BT kill count is non-zero, we'll get this
 940          * notification again.
 941          */
 942         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 943             priv->cfg->bt_params &&
 944             priv->cfg->bt_params->advanced_bt_coexist) {
 945                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 946         }
 947
 948         if (tx_resp->frame_count == 1)
 949                 return;
 950
 951         IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
 952                            agg->txq_id,
 953                            le32_to_cpu(tx_resp->rate_n_flags),
 954                            iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
 955
 956         /* Construct bit-map of pending frames within Tx window */
 957         for (i = 0; i < tx_resp->frame_count; i++) {
 958                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 959                 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
 960
 961                 if (status & AGG_TX_STATUS_MSK)
 962                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 963
 964                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 965                               AGG_TX_STATE_ABORT_MSK))
 966                         continue;
 967
 968                 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
 969                         IWL_DEBUG_TX_REPLY(priv,
 970                                            "%d: status %s (0x%04x), try-count (0x%01x)\n",
 971                                            i,
 972                                            iwl_get_agg_tx_fail_reason(fstatus),
 973                                            fstatus & AGG_TX_STATUS_MSK,
 974                                            retry_cnt);
 975         }
 976 }
 977
 978 #ifdef CONFIG_IWLWIFI_DEBUG
 979 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 980
 981 const char *iwl_get_agg_tx_fail_reason(u16 status)
 982 {
 983         status &= AGG_TX_STATUS_MSK;
 984         switch (status) {
 985         case AGG_TX_STATE_TRANSMITTED:
 986                 return "SUCCESS";
 987                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 988                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 989                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 990                 AGG_TX_STATE_FAIL(ABORT_MSK);
 991                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 992                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 993                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 994                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 995                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 996                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 997                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 998                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
 999         }
1000
1001         return "UNKNOWN";
1002 }
1003 #endif /* CONFIG_IWLWIFI_DEBUG */
1004
1005 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1006 {
1007         status &= TX_STATUS_MSK;
1008
1009         switch (status) {
1010         case TX_STATUS_POSTPONE_DELAY:
1011                 priv->reply_tx_stats.pp_delay++;
1012                 break;
1013         case TX_STATUS_POSTPONE_FEW_BYTES:
1014                 priv->reply_tx_stats.pp_few_bytes++;
1015                 break;
1016         case TX_STATUS_POSTPONE_BT_PRIO:
1017                 priv->reply_tx_stats.pp_bt_prio++;
1018                 break;
1019         case TX_STATUS_POSTPONE_QUIET_PERIOD:
1020                 priv->reply_tx_stats.pp_quiet_period++;
1021                 break;
1022         case TX_STATUS_POSTPONE_CALC_TTAK:
1023                 priv->reply_tx_stats.pp_calc_ttak++;
1024                 break;
1025         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1026                 priv->reply_tx_stats.int_crossed_retry++;
1027                 break;
1028         case TX_STATUS_FAIL_SHORT_LIMIT:
1029                 priv->reply_tx_stats.short_limit++;
1030                 break;
1031         case TX_STATUS_FAIL_LONG_LIMIT:
1032                 priv->reply_tx_stats.long_limit++;
1033                 break;
1034         case TX_STATUS_FAIL_FIFO_UNDERRUN:
1035                 priv->reply_tx_stats.fifo_underrun++;
1036                 break;
1037         case TX_STATUS_FAIL_DRAIN_FLOW:
1038                 priv->reply_tx_stats.drain_flow++;
1039                 break;
1040         case TX_STATUS_FAIL_RFKILL_FLUSH:
1041                 priv->reply_tx_stats.rfkill_flush++;
1042                 break;
1043         case TX_STATUS_FAIL_LIFE_EXPIRE:
1044                 priv->reply_tx_stats.life_expire++;
1045                 break;
1046         case TX_STATUS_FAIL_DEST_PS:
1047                 priv->reply_tx_stats.dest_ps++;
1048                 break;
1049         case TX_STATUS_FAIL_HOST_ABORTED:
1050                 priv->reply_tx_stats.host_abort++;
1051                 break;
1052         case TX_STATUS_FAIL_BT_RETRY:
1053                 priv->reply_tx_stats.bt_retry++;
1054                 break;
1055         case TX_STATUS_FAIL_STA_INVALID:
1056                 priv->reply_tx_stats.sta_invalid++;
1057                 break;
1058         case TX_STATUS_FAIL_FRAG_DROPPED:
1059                 priv->reply_tx_stats.frag_drop++;
1060                 break;
1061         case TX_STATUS_FAIL_TID_DISABLE:
1062                 priv->reply_tx_stats.tid_disable++;
1063                 break;
1064         case TX_STATUS_FAIL_FIFO_FLUSHED:
1065                 priv->reply_tx_stats.fifo_flush++;
1066                 break;
1067         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1068                 priv->reply_tx_stats.insuff_cf_poll++;
1069                 break;
1070         case TX_STATUS_FAIL_PASSIVE_NO_RX:
1071                 priv->reply_tx_stats.fail_hw_drop++;
1072                 break;
1073         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1074                 priv->reply_tx_stats.sta_color_mismatch++;
1075                 break;
1076         default:
1077                 priv->reply_tx_stats.unknown++;
1078                 break;
1079         }
1080 }
1081
1082 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1083                                  struct ieee80211_tx_info *info,
1084                                  struct iwlagn_tx_resp *tx_resp)
1085 {
1086         u16 status = le16_to_cpu(tx_resp->status.status);
1087
1088         info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1089
1090         info->status.rates[0].count = tx_resp->failure_frame + 1;
1091         info->flags |= iwl_tx_status_to_mac80211(status);
1092         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1093                                     info);
1094         if (!iwl_is_tx_success(status))
1095                 iwlagn_count_tx_err_status(priv, status);
1096 }
1097
1098 static void iwl_check_abort_status(struct iwl_priv *priv,
1099                             u8 frame_count, u32 status)
1100 {
1101         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1102                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1103                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1104                         queue_work(priv->workqueue, &priv->tx_flush);
1105         }
1106 }
1107
1108 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1109                                struct iwl_device_cmd *cmd)
1110 {
1111         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1112         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1113         int txq_id = SEQ_TO_QUEUE(sequence);
1114         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1115         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1116         struct ieee80211_hdr *hdr;
1117         u32 status = le16_to_cpu(tx_resp->status.status);
1118         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1119         int tid;
1120         int sta_id;
1121         int freed;
1122         struct ieee80211_tx_info *info;
1123         struct sk_buff_head skbs;
1124         struct sk_buff *skb;
1125         struct iwl_rxon_context *ctx;
1126         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1127         bool is_offchannel_skb;
1128
1129         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1130                 IWLAGN_TX_RES_TID_POS;
1131         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1132                 IWLAGN_TX_RES_RA_POS;
1133
1134         spin_lock_bh(&priv->sta_lock);
1135
1136         if (is_agg) {
1137                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1138                              tid >= IWL_MAX_TID_COUNT);
1139                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1140                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1141                                 priv->tid_data[sta_id][tid].agg.txq_id);
1142                 iwl_rx_reply_tx_agg(priv, tx_resp);
1143         }
1144
1145         __skb_queue_head_init(&skbs);
1146
1147         is_offchannel_skb = false;
1148
1149         if (tx_resp->frame_count == 1) {
1150                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1151                 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1152
1153                 if (is_agg) {
1154                         /* If this is an aggregation queue, we can rely on the
1155                          * ssn since the wifi sequence number corresponds to
1156                          * the index in the TFD ring (%256).
1157                          * The seq_ctl is the sequence control of the packet
1158                          * to which this Tx response relates. But if there is a
1159                          * hole in the bitmap of the BA we received, this Tx
1160                          * response may allow to reclaim the hole and all the
1161                          * subsequent packets that were already acked.
1162                          * In that case, seq_ctl != ssn, and the next packet
1163                          * to be reclaimed will be ssn and not seq_ctl.
1164                          */
1165                         next_reclaimed = ssn;
1166                 }
1167
1168                 if (tid != IWL_TID_NON_QOS) {
1169                         priv->tid_data[sta_id][tid].next_reclaimed =
1170                                 next_reclaimed;
1171                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1172                                                   next_reclaimed);
1173                 }
1174
1175                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1176
1177                 iwlagn_check_ratid_empty(priv, sta_id, tid);
1178                 freed = 0;
1179
1180                 /* process frames */
1181                 skb_queue_walk(&skbs, skb) {
1182                         hdr = (struct ieee80211_hdr *)skb->data;
1183
1184                         if (!ieee80211_is_data_qos(hdr->frame_control))
1185                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1186
1187                         info = IEEE80211_SKB_CB(skb);
1188                         ctx = info->driver_data[0];
1189                         iwl_trans_free_tx_cmd(priv->trans,
1190                                               info->driver_data[1]);
1191
1192                         memset(&info->status, 0, sizeof(info->status));
1193
1194                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1195                             ctx->vif &&
1196                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1197                                 /* block and stop all queues */
1198                                 priv->passive_no_rx = true;
1199                                 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1200                                                     "passive channel");
1201                                 ieee80211_stop_queues(priv->hw);
1202
1203                                 IWL_DEBUG_TX_REPLY(priv,
1204                                            "TXQ %d status %s (0x%08x) "
1205                                            "rate_n_flags 0x%x retries %d\n",
1206                                            txq_id,
1207                                            iwl_get_tx_fail_reason(status),
1208                                            status,
1209                                            le32_to_cpu(tx_resp->rate_n_flags),
1210                                            tx_resp->failure_frame);
1211
1212                                 IWL_DEBUG_TX_REPLY(priv,
1213                                            "FrameCnt = %d, idx=%d\n",
1214                                            tx_resp->frame_count, cmd_index);
1215                         }
1216
1217                         /* check if BAR is needed */
1218                         if (is_agg && !iwl_is_tx_success(status))
1219                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1220                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1221                                      tx_resp);
1222                         if (!is_agg)
1223                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1224
1225                         is_offchannel_skb =
1226                                 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1227                         freed++;
1228                 }
1229
1230                 if (tid != IWL_TID_NON_QOS) {
1231                         priv->tid_data[sta_id][tid].next_reclaimed =
1232                                 next_reclaimed;
1233                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1234                                            next_reclaimed);
1235                 }
1236
1237                 if (!is_agg && freed != 1)
1238                         IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1239
1240                 /*
1241                  * An offchannel frame can be send only on the AUX queue, where
1242                  * there is no aggregation (and reordering) so it only is single
1243                  * skb is expected to be processed.
1244                  */
1245                 if (is_offchannel_skb && freed != 1)
1246                         IWL_ERR(priv, "OFFCHANNEL SKB freed %d\n", freed);
1247
1248                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1249                                    iwl_get_tx_fail_reason(status), status);
1250
1251                 IWL_DEBUG_TX_REPLY(priv,
1252                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1253                                    le32_to_cpu(tx_resp->rate_n_flags),
1254                                    tx_resp->failure_frame,
1255                                    SEQ_TO_INDEX(sequence), ssn,
1256                                    le16_to_cpu(tx_resp->seq_ctl));
1257         }
1258
1259         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1260         spin_unlock_bh(&priv->sta_lock);
1261
1262         while (!skb_queue_empty(&skbs)) {
1263                 skb = __skb_dequeue(&skbs);
1264                 ieee80211_tx_status_ni(priv->hw, skb);
1265         }
1266
1267         if (is_offchannel_skb)
1268                 iwl_scan_offchannel_skb_status(priv);
1269
1270         return 0;
1271 }
1272
1273 /**
1274  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1275  *
1276  * Handles block-acknowledge notification from device, which reports success
1277  * of frames sent via aggregation.
1278  */
1279 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1280                                    struct iwl_rx_cmd_buffer *rxb,
1281                                    struct iwl_device_cmd *cmd)
1282 {
1283         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1284         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1285         struct iwl_ht_agg *agg;
1286         struct sk_buff_head reclaimed_skbs;
1287         struct ieee80211_tx_info *info;
1288         struct ieee80211_hdr *hdr;
1289         struct sk_buff *skb;
1290         int sta_id;
1291         int tid;
1292         int freed;
1293
1294         /* "flow" corresponds to Tx queue */
1295         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1296
1297         /* "ssn" is start of block-ack Tx window, corresponds to index
1298          * (in Tx queue's circular buffer) of first TFD/frame in window */
1299         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1300
1301         if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1302                 IWL_ERR(priv,
1303                         "BUG_ON scd_flow is bigger than number of queues\n");
1304                 return 0;
1305         }
1306
1307         sta_id = ba_resp->sta_id;
1308         tid = ba_resp->tid;
1309         agg = &priv->tid_data[sta_id][tid].agg;
1310
1311         spin_lock_bh(&priv->sta_lock);
1312
1313         if (unlikely(!agg->wait_for_ba)) {
1314                 if (unlikely(ba_resp->bitmap))
1315                         IWL_ERR(priv, "Received BA when not expected\n");
1316                 spin_unlock_bh(&priv->sta_lock);
1317                 return 0;
1318         }
1319
1320         if (unlikely(scd_flow != agg->txq_id)) {
1321                 /*
1322                  * FIXME: this is a uCode bug which need to be addressed,
1323                  * log the information and return for now.
1324                  * Since it is can possibly happen very often and in order
1325                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1326                  */
1327                 IWL_DEBUG_TX_QUEUES(priv,
1328                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1329                                     scd_flow, sta_id, tid, agg->txq_id);
1330                 spin_unlock_bh(&priv->sta_lock);
1331                 return 0;
1332         }
1333
1334         __skb_queue_head_init(&reclaimed_skbs);
1335
1336         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1337          * block-ack window (we assume that they've been successfully
1338          * transmitted ... if not, it's too late anyway). */
1339         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1340                           &reclaimed_skbs);
1341
1342         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1343                            "sta_id = %d\n",
1344                            agg->wait_for_ba,
1345                            (u8 *) &ba_resp->sta_addr_lo32,
1346                            ba_resp->sta_id);
1347         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1348                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1349                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1350                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1351                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1352                            ba_resp->txed_2_done);
1353
1354         /* Mark that the expected block-ack response arrived */
1355         agg->wait_for_ba = false;
1356
1357         /* Sanity check values reported by uCode */
1358         if (ba_resp->txed_2_done > ba_resp->txed) {
1359                 IWL_DEBUG_TX_REPLY(priv,
1360                         "bogus sent(%d) and ack(%d) count\n",
1361                         ba_resp->txed, ba_resp->txed_2_done);
1362                 /*
1363                  * set txed_2_done = txed,
1364                  * so it won't impact rate scale
1365                  */
1366                 ba_resp->txed = ba_resp->txed_2_done;
1367         }
1368
1369         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1370
1371         iwlagn_check_ratid_empty(priv, sta_id, tid);
1372         freed = 0;
1373
1374         skb_queue_walk(&reclaimed_skbs, skb) {
1375                 hdr = (struct ieee80211_hdr *)skb->data;
1376
1377                 if (ieee80211_is_data_qos(hdr->frame_control))
1378                         freed++;
1379                 else
1380                         WARN_ON_ONCE(1);
1381
1382                 info = IEEE80211_SKB_CB(skb);
1383                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1384
1385                 if (freed == 1) {
1386                         /* this is the first skb we deliver in this batch */
1387                         /* put the rate scaling data there */
1388                         info = IEEE80211_SKB_CB(skb);
1389                         memset(&info->status, 0, sizeof(info->status));
1390                         info->flags |= IEEE80211_TX_STAT_ACK;
1391                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1392                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1393                         info->status.ampdu_len = ba_resp->txed;
1394                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1395                                                     info);
1396                 }
1397         }
1398
1399         spin_unlock_bh(&priv->sta_lock);
1400
1401         while (!skb_queue_empty(&reclaimed_skbs)) {
1402                 skb = __skb_dequeue(&reclaimed_skbs);
1403                 ieee80211_tx_status_ni(priv->hw, skb);
1404         }
1405
1406         return 0;
1407 }