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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * 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 <linuxwifi@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/sched.h>
  33 #include <linux/ieee80211.h>
  34 #include "iwl-io.h"
  35 #include "iwl-trans.h"
  36 #include "iwl-agn-hw.h"
  37 #include "dev.h"
  38 #include "agn.h"
  39
  40 static const u8 tid_to_ac[] = {
  41         IEEE80211_AC_BE,
  42         IEEE80211_AC_BK,
  43         IEEE80211_AC_BK,
  44         IEEE80211_AC_BE,
  45         IEEE80211_AC_VI,
  46         IEEE80211_AC_VI,
  47         IEEE80211_AC_VO,
  48         IEEE80211_AC_VO,
  49 };
  50
  51 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
  52                                      struct ieee80211_tx_info *info,
  53                                      __le16 fc, __le32 *tx_flags)
  54 {
  55         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
  56             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
  57             info->flags & IEEE80211_TX_CTL_AMPDU)
  58                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
  59 }
  60
  61 /*
  62  * handle build REPLY_TX command notification.
  63  */
  64 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
  65                                       struct sk_buff *skb,
  66                                       struct iwl_tx_cmd *tx_cmd,
  67                                       struct ieee80211_tx_info *info,
  68                                       struct ieee80211_hdr *hdr, u8 sta_id)
  69 {
  70         __le16 fc = hdr->frame_control;
  71         __le32 tx_flags = tx_cmd->tx_flags;
  72
  73         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
  74
  75         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  76                 tx_flags |= TX_CMD_FLG_ACK_MSK;
  77         else
  78                 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
  79
  80         if (ieee80211_is_probe_resp(fc))
  81                 tx_flags |= TX_CMD_FLG_TSF_MSK;
  82         else if (ieee80211_is_back_req(fc))
  83                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
  84         else if (info->band == NL80211_BAND_2GHZ &&
  85                  priv->lib->bt_params &&
  86                  priv->lib->bt_params->advanced_bt_coexist &&
  87                  (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
  88                  ieee80211_is_reassoc_req(fc) ||
  89                  info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
  90                 tx_flags |= TX_CMD_FLG_IGNORE_BT;
  91
  92
  93         tx_cmd->sta_id = sta_id;
  94         if (ieee80211_has_morefrags(fc))
  95                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
  96
  97         if (ieee80211_is_data_qos(fc)) {
  98                 u8 *qc = ieee80211_get_qos_ctl(hdr);
  99                 tx_cmd->tid_tspec = qc[0] & 0xf;
 100                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 101         } else {
 102                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 103                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 104                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 105                 else
 106                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 107         }
 108
 109         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
 110
 111         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 112         if (ieee80211_is_mgmt(fc)) {
 113                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 114                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 115                 else
 116                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 117         } else {
 118                 tx_cmd->timeout.pm_frame_timeout = 0;
 119         }
 120
 121         tx_cmd->driver_txop = 0;
 122         tx_cmd->tx_flags = tx_flags;
 123         tx_cmd->next_frame_len = 0;
 124 }
 125
 126 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 127                                      struct iwl_tx_cmd *tx_cmd,
 128                                      struct ieee80211_tx_info *info,
 129                                      struct ieee80211_sta *sta,
 130                                      __le16 fc)
 131 {
 132         u32 rate_flags;
 133         int rate_idx;
 134         u8 rts_retry_limit;
 135         u8 data_retry_limit;
 136         u8 rate_plcp;
 137
 138         if (priv->wowlan) {
 139                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 140                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 141         } else {
 142                 /* Set retry limit on RTS packets */
 143                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 144
 145                 /* Set retry limit on DATA packets and Probe Responses*/
 146                 if (ieee80211_is_probe_resp(fc)) {
 147                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 148                         rts_retry_limit =
 149                                 min(data_retry_limit, rts_retry_limit);
 150                 } else if (ieee80211_is_back_req(fc))
 151                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 152                 else
 153                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 154         }
 155
 156         tx_cmd->data_retry_limit = data_retry_limit;
 157         tx_cmd->rts_retry_limit = rts_retry_limit;
 158
 159         /* DATA packets will use the uCode station table for rate/antenna
 160          * selection */
 161         if (ieee80211_is_data(fc)) {
 162                 tx_cmd->initial_rate_index = 0;
 163                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 164                 return;
 165         } else if (ieee80211_is_back_req(fc))
 166                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 167
 168         /**
 169          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 170          * not really a TX rate.  Thus, we use the lowest supported rate for
 171          * this band.  Also use the lowest supported rate if the stored rate
 172          * index is invalid.
 173          */
 174         rate_idx = info->control.rates[0].idx;
 175         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 176                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 177                 rate_idx = rate_lowest_index(
 178                                 &priv->nvm_data->bands[info->band], sta);
 179         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 180         if (info->band == NL80211_BAND_5GHZ)
 181                 rate_idx += IWL_FIRST_OFDM_RATE;
 182         /* Get PLCP rate for tx_cmd->rate_n_flags */
 183         rate_plcp = iwl_rates[rate_idx].plcp;
 184         /* Zero out flags for this packet */
 185         rate_flags = 0;
 186
 187         /* Set CCK flag as needed */
 188         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 189                 rate_flags |= RATE_MCS_CCK_MSK;
 190
 191         /* Set up antennas */
 192         if (priv->lib->bt_params &&
 193             priv->lib->bt_params->advanced_bt_coexist &&
 194             priv->bt_full_concurrent) {
 195                 /* operated as 1x1 in full concurrency mode */
 196                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 197                                 first_antenna(priv->nvm_data->valid_tx_ant));
 198         } else
 199                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
 200                                         priv, priv->mgmt_tx_ant,
 201                                         priv->nvm_data->valid_tx_ant);
 202         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 203
 204         /* Set the rate in the TX cmd */
 205         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 206 }
 207
 208 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 209                                          struct ieee80211_tx_info *info,
 210                                          struct iwl_tx_cmd *tx_cmd,
 211                                          struct sk_buff *skb_frag)
 212 {
 213         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 214
 215         switch (keyconf->cipher) {
 216         case WLAN_CIPHER_SUITE_CCMP:
 217                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 218                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 219                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 220                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 221                 break;
 222
 223         case WLAN_CIPHER_SUITE_TKIP:
 224                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 225                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 226                 break;
 227
 228         case WLAN_CIPHER_SUITE_WEP104:
 229                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 230                 /* fall through */
 231         case WLAN_CIPHER_SUITE_WEP40:
 232                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 233                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 234
 235                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 236
 237                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 238                              "with key %d\n", keyconf->keyidx);
 239                 break;
 240
 241         default:
 242                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 243                 break;
 244         }
 245 }
 246
 247 /**
 248  * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
 249  * @context: the current context
 250  * @sta: mac80211 station
 251  *
 252  * In certain circumstances mac80211 passes a station pointer
 253  * that may be %NULL, for example during TX or key setup. In
 254  * that case, we need to use the broadcast station, so this
 255  * inline wraps that pattern.
 256  */
 257 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
 258                                    struct ieee80211_sta *sta)
 259 {
 260         int sta_id;
 261
 262         if (!sta)
 263                 return context->bcast_sta_id;
 264
 265         sta_id = iwl_sta_id(sta);
 266
 267         /*
 268          * mac80211 should not be passing a partially
 269          * initialised station!
 270          */
 271         WARN_ON(sta_id == IWL_INVALID_STATION);
 272
 273         return sta_id;
 274 }
 275
 276 /*
 277  * start REPLY_TX command process
 278  */
 279 int iwlagn_tx_skb(struct iwl_priv *priv,
 280                   struct ieee80211_sta *sta,
 281                   struct sk_buff *skb)
 282 {
 283         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 284         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 285         struct iwl_station_priv *sta_priv = NULL;
 286         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 287         struct iwl_device_cmd *dev_cmd;
 288         struct iwl_tx_cmd *tx_cmd;
 289         __le16 fc;
 290         u8 hdr_len;
 291         u16 len, seq_number = 0;
 292         u8 sta_id, tid = IWL_MAX_TID_COUNT;
 293         bool is_agg = false, is_data_qos = false;
 294         int txq_id;
 295
 296         if (info->control.vif)
 297                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 298
 299         if (iwl_is_rfkill(priv)) {
 300                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 301                 goto drop_unlock_priv;
 302         }
 303
 304         fc = hdr->frame_control;
 305
 306 #ifdef CONFIG_IWLWIFI_DEBUG
 307         if (ieee80211_is_auth(fc))
 308                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 309         else if (ieee80211_is_assoc_req(fc))
 310                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 311         else if (ieee80211_is_reassoc_req(fc))
 312                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 313 #endif
 314
 315         if (unlikely(ieee80211_is_probe_resp(fc))) {
 316                 struct iwl_wipan_noa_data *noa_data =
 317                         rcu_dereference(priv->noa_data);
 318
 319                 if (noa_data &&
 320                     pskb_expand_head(skb, 0, noa_data->length,
 321                                      GFP_ATOMIC) == 0) {
 322                         memcpy(skb_put(skb, noa_data->length),
 323                                noa_data->data, noa_data->length);
 324                         hdr = (struct ieee80211_hdr *)skb->data;
 325                 }
 326         }
 327
 328         hdr_len = ieee80211_hdrlen(fc);
 329
 330         /* For management frames use broadcast id to do not break aggregation */
 331         if (!ieee80211_is_data(fc))
 332                 sta_id = ctx->bcast_sta_id;
 333         else {
 334                 /* Find index into station table for destination station */
 335                 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
 336                 if (sta_id == IWL_INVALID_STATION) {
 337                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 338                                        hdr->addr1);
 339                         goto drop_unlock_priv;
 340                 }
 341         }
 342
 343         if (sta)
 344                 sta_priv = (void *)sta->drv_priv;
 345
 346         if (sta_priv && sta_priv->asleep &&
 347             (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
 348                 /*
 349                  * This sends an asynchronous command to the device,
 350                  * but we can rely on it being processed before the
 351                  * next frame is processed -- and the next frame to
 352                  * this station is the one that will consume this
 353                  * counter.
 354                  * For now set the counter to just 1 since we do not
 355                  * support uAPSD yet.
 356                  *
 357                  * FIXME: If we get two non-bufferable frames one
 358                  * after the other, we might only send out one of
 359                  * them because this is racy.
 360                  */
 361                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 362         }
 363
 364         dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
 365
 366         if (unlikely(!dev_cmd))
 367                 goto drop_unlock_priv;
 368
 369         memset(dev_cmd, 0, sizeof(*dev_cmd));
 370         dev_cmd->hdr.cmd = REPLY_TX;
 371         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 372
 373         /* Total # bytes to be transmitted */
 374         len = (u16)skb->len;
 375         tx_cmd->len = cpu_to_le16(len);
 376
 377         if (info->control.hw_key)
 378                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
 379
 380         /* TODO need this for burst mode later on */
 381         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 382
 383         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
 384
 385         memset(&info->status, 0, sizeof(info->status));
 386         memset(info->driver_data, 0, sizeof(info->driver_data));
 387
 388         info->driver_data[0] = ctx;
 389         info->driver_data[1] = dev_cmd;
 390         /* From now on, we cannot access info->control */
 391
 392         spin_lock(&priv->sta_lock);
 393
 394         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
 395                 u8 *qc = NULL;
 396                 struct iwl_tid_data *tid_data;
 397                 qc = ieee80211_get_qos_ctl(hdr);
 398                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 399                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 400                         goto drop_unlock_sta;
 401                 tid_data = &priv->tid_data[sta_id][tid];
 402
 403                 /* aggregation is on for this <sta,tid> */
 404                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 405                     tid_data->agg.state != IWL_AGG_ON) {
 406                         IWL_ERR(priv,
 407                                 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
 408                                 info->flags, tid_data->agg.state);
 409                         IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
 410                                 sta_id, tid,
 411                                 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
 412                         goto drop_unlock_sta;
 413                 }
 414
 415                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 416                  * only. Check this here.
 417                  */
 418                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 419                               tid_data->agg.state != IWL_AGG_OFF,
 420                               "Tx while agg.state = %d\n", tid_data->agg.state))
 421                         goto drop_unlock_sta;
 422
 423                 seq_number = tid_data->seq_number;
 424                 seq_number &= IEEE80211_SCTL_SEQ;
 425                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 426                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 427                 seq_number += 0x10;
 428
 429                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 430                         is_agg = true;
 431                 is_data_qos = true;
 432         }
 433
 434         /* Copy MAC header from skb into command buffer */
 435         memcpy(tx_cmd->hdr, hdr, hdr_len);
 436
 437         txq_id = info->hw_queue;
 438
 439         if (is_agg)
 440                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 441         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 442                 /*
 443                  * The microcode will clear the more data
 444                  * bit in the last frame it transmits.
 445                  */
 446                 hdr->frame_control |=
 447                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 448         }
 449
 450         WARN_ON_ONCE(is_agg &&
 451                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 452
 453         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 454                      txq_id, seq_number);
 455
 456         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 457                 goto drop_unlock_sta;
 458
 459         if (is_data_qos && !ieee80211_has_morefrags(fc))
 460                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 461
 462         spin_unlock(&priv->sta_lock);
 463
 464         /*
 465          * Avoid atomic ops if it isn't an associated client.
 466          * Also, if this is a packet for aggregation, don't
 467          * increase the counter because the ucode will stop
 468          * aggregation queues when their respective station
 469          * goes to sleep.
 470          */
 471         if (sta_priv && sta_priv->client && !is_agg)
 472                 atomic_inc(&sta_priv->pending_frames);
 473
 474         return 0;
 475
 476 drop_unlock_sta:
 477         if (dev_cmd)
 478                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 479         spin_unlock(&priv->sta_lock);
 480 drop_unlock_priv:
 481         return -1;
 482 }
 483
 484 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 485 {
 486         int q;
 487
 488         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 489              q < priv->cfg->base_params->num_of_queues; q++) {
 490                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 491                         priv->queue_to_mac80211[q] = mq;
 492                         return q;
 493                 }
 494         }
 495
 496         return -ENOSPC;
 497 }
 498
 499 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 500 {
 501         clear_bit(q, priv->agg_q_alloc);
 502         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 503 }
 504
 505 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 506                         struct ieee80211_sta *sta, u16 tid)
 507 {
 508         struct iwl_tid_data *tid_data;
 509         int sta_id, txq_id;
 510         enum iwl_agg_state agg_state;
 511
 512         sta_id = iwl_sta_id(sta);
 513
 514         if (sta_id == IWL_INVALID_STATION) {
 515                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 516                 return -ENXIO;
 517         }
 518
 519         spin_lock_bh(&priv->sta_lock);
 520
 521         tid_data = &priv->tid_data[sta_id][tid];
 522         txq_id = tid_data->agg.txq_id;
 523
 524         switch (tid_data->agg.state) {
 525         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 526                 /*
 527                 * This can happen if the peer stops aggregation
 528                 * again before we've had a chance to drain the
 529                 * queue we selected previously, i.e. before the
 530                 * session was really started completely.
 531                 */
 532                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 533                 goto turn_off;
 534         case IWL_AGG_STARTING:
 535                 /*
 536                  * This can happen when the session is stopped before
 537                  * we receive ADDBA response
 538                  */
 539                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 540                 goto turn_off;
 541         case IWL_AGG_ON:
 542                 break;
 543         default:
 544                 IWL_WARN(priv,
 545                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 546                          sta_id, tid, tid_data->agg.state);
 547                 spin_unlock_bh(&priv->sta_lock);
 548                 return 0;
 549         }
 550
 551         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 552
 553         /* There are still packets for this RA / TID in the HW */
 554         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 555                 IWL_DEBUG_TX_QUEUES(priv,
 556                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 557                         sta_id, tid, txq_id);
 558         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 559                 IWL_DEBUG_TX_QUEUES(priv,
 560                                     "Can't proceed: ssn %d, next_recl = %d\n",
 561                                     tid_data->agg.ssn,
 562                                     tid_data->next_reclaimed);
 563                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 564                 spin_unlock_bh(&priv->sta_lock);
 565                 return 0;
 566         }
 567
 568         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 569                             tid_data->agg.ssn);
 570 turn_off:
 571         agg_state = tid_data->agg.state;
 572         tid_data->agg.state = IWL_AGG_OFF;
 573
 574         spin_unlock_bh(&priv->sta_lock);
 575
 576         if (test_bit(txq_id, priv->agg_q_alloc)) {
 577                 /*
 578                  * If the transport didn't know that we wanted to start
 579                  * agreggation, don't tell it that we want to stop them.
 580                  * This can happen when we don't get the addBA response on
 581                  * time, or we hadn't time to drain the AC queues.
 582                  */
 583                 if (agg_state == IWL_AGG_ON)
 584                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 585                 else
 586                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 587                                             agg_state);
 588                 iwlagn_dealloc_agg_txq(priv, txq_id);
 589         }
 590
 591         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 592
 593         return 0;
 594 }
 595
 596 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 597                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 598 {
 599         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 600         struct iwl_tid_data *tid_data;
 601         int sta_id, txq_id, ret;
 602
 603         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 604                      sta->addr, tid);
 605
 606         sta_id = iwl_sta_id(sta);
 607         if (sta_id == IWL_INVALID_STATION) {
 608                 IWL_ERR(priv, "Start AGG on invalid station\n");
 609                 return -ENXIO;
 610         }
 611         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 612                 return -EINVAL;
 613
 614         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 615                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 616                 return -ENXIO;
 617         }
 618
 619         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 620         if (txq_id < 0) {
 621                 IWL_DEBUG_TX_QUEUES(priv,
 622                         "No free aggregation queue for %pM/%d\n",
 623                         sta->addr, tid);
 624                 return txq_id;
 625         }
 626
 627         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 628         if (ret)
 629                 return ret;
 630
 631         spin_lock_bh(&priv->sta_lock);
 632         tid_data = &priv->tid_data[sta_id][tid];
 633         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 634         tid_data->agg.txq_id = txq_id;
 635
 636         *ssn = tid_data->agg.ssn;
 637
 638         if (*ssn == tid_data->next_reclaimed) {
 639                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 640                                     tid_data->agg.ssn);
 641                 tid_data->agg.state = IWL_AGG_STARTING;
 642                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 643         } else {
 644                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 645                                     "next_reclaimed = %d\n",
 646                                     tid_data->agg.ssn,
 647                                     tid_data->next_reclaimed);
 648                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 649         }
 650         spin_unlock_bh(&priv->sta_lock);
 651
 652         return ret;
 653 }
 654
 655 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
 656                         struct ieee80211_sta *sta, u16 tid)
 657 {
 658         struct iwl_tid_data *tid_data;
 659         enum iwl_agg_state agg_state;
 660         int sta_id, txq_id;
 661         sta_id = iwl_sta_id(sta);
 662
 663         /*
 664          * First set the agg state to OFF to avoid calling
 665          * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
 666          */
 667         spin_lock_bh(&priv->sta_lock);
 668
 669         tid_data = &priv->tid_data[sta_id][tid];
 670         txq_id = tid_data->agg.txq_id;
 671         agg_state = tid_data->agg.state;
 672         IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
 673                             sta_id, tid, txq_id, tid_data->agg.state);
 674
 675         tid_data->agg.state = IWL_AGG_OFF;
 676
 677         spin_unlock_bh(&priv->sta_lock);
 678
 679         if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
 680                 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
 681
 682         if (test_bit(txq_id, priv->agg_q_alloc)) {
 683                 /*
 684                  * If the transport didn't know that we wanted to start
 685                  * agreggation, don't tell it that we want to stop them.
 686                  * This can happen when we don't get the addBA response on
 687                  * time, or we hadn't time to drain the AC queues.
 688                  */
 689                 if (agg_state == IWL_AGG_ON)
 690                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 691                 else
 692                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 693                                             agg_state);
 694                 iwlagn_dealloc_agg_txq(priv, txq_id);
 695         }
 696
 697         return 0;
 698 }
 699
 700 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 701                         struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 702 {
 703         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 704         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 705         int q, fifo;
 706         u16 ssn;
 707
 708         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 709
 710         spin_lock_bh(&priv->sta_lock);
 711         ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
 712         q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
 713         priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
 714         spin_unlock_bh(&priv->sta_lock);
 715
 716         fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
 717
 718         iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
 719                              buf_size, ssn, 0);
 720
 721         /*
 722          * If the limit is 0, then it wasn't initialised yet,
 723          * use the default. We can do that since we take the
 724          * minimum below, and we don't want to go above our
 725          * default due to hardware restrictions.
 726          */
 727         if (sta_priv->max_agg_bufsize == 0)
 728                 sta_priv->max_agg_bufsize =
 729                         LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 730
 731         /*
 732          * Even though in theory the peer could have different
 733          * aggregation reorder buffer sizes for different sessions,
 734          * our ucode doesn't allow for that and has a global limit
 735          * for each station. Therefore, use the minimum of all the
 736          * aggregation sessions and our default value.
 737          */
 738         sta_priv->max_agg_bufsize =
 739                 min(sta_priv->max_agg_bufsize, buf_size);
 740
 741         if (priv->hw_params.use_rts_for_aggregation) {
 742                 /*
 743                  * switch to RTS/CTS if it is the prefer protection
 744                  * method for HT traffic
 745                  */
 746
 747                 sta_priv->lq_sta.lq.general_params.flags |=
 748                         LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 749         }
 750         priv->agg_tids_count++;
 751         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 752                      priv->agg_tids_count);
 753
 754         sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 755                 sta_priv->max_agg_bufsize;
 756
 757         IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 758                  sta->addr, tid);
 759
 760         return iwl_send_lq_cmd(priv, ctx,
 761                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 762 }
 763
 764 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
 765 {
 766         struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
 767         enum iwl_rxon_context_id ctx;
 768         struct ieee80211_vif *vif;
 769         u8 *addr;
 770
 771         lockdep_assert_held(&priv->sta_lock);
 772
 773         addr = priv->stations[sta_id].sta.sta.addr;
 774         ctx = priv->stations[sta_id].ctxid;
 775         vif = priv->contexts[ctx].vif;
 776
 777         switch (priv->tid_data[sta_id][tid].agg.state) {
 778         case IWL_EMPTYING_HW_QUEUE_DELBA:
 779                 /* There are no packets for this RA / TID in the HW any more */
 780                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 781                         IWL_DEBUG_TX_QUEUES(priv,
 782                                 "Can continue DELBA flow ssn = next_recl = %d\n",
 783                                 tid_data->next_reclaimed);
 784                         iwl_trans_txq_disable(priv->trans,
 785                                               tid_data->agg.txq_id, true);
 786                         iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
 787                         tid_data->agg.state = IWL_AGG_OFF;
 788                         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 789                 }
 790                 break;
 791         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 792                 /* There are no packets for this RA / TID in the HW any more */
 793                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 794                         IWL_DEBUG_TX_QUEUES(priv,
 795                                 "Can continue ADDBA flow ssn = next_recl = %d\n",
 796                                 tid_data->next_reclaimed);
 797                         tid_data->agg.state = IWL_AGG_STARTING;
 798                         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
 799                 }
 800                 break;
 801         default:
 802                 break;
 803         }
 804 }
 805
 806 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 807                                      struct iwl_rxon_context *ctx,
 808                                      const u8 *addr1)
 809 {
 810         struct ieee80211_sta *sta;
 811         struct iwl_station_priv *sta_priv;
 812
 813         rcu_read_lock();
 814         sta = ieee80211_find_sta(ctx->vif, addr1);
 815         if (sta) {
 816                 sta_priv = (void *)sta->drv_priv;
 817                 /* avoid atomic ops if this isn't a client */
 818                 if (sta_priv->client &&
 819                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 820                         ieee80211_sta_block_awake(priv->hw, sta, false);
 821         }
 822         rcu_read_unlock();
 823 }
 824
 825 /**
 826  * translate ucode response to mac80211 tx status control values
 827  */
 828 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 829                                   struct ieee80211_tx_info *info)
 830 {
 831         struct ieee80211_tx_rate *r = &info->status.rates[0];
 832
 833         info->status.antenna =
 834                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 835         if (rate_n_flags & RATE_MCS_HT_MSK)
 836                 r->flags |= IEEE80211_TX_RC_MCS;
 837         if (rate_n_flags & RATE_MCS_GF_MSK)
 838                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 839         if (rate_n_flags & RATE_MCS_HT40_MSK)
 840                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 841         if (rate_n_flags & RATE_MCS_DUP_MSK)
 842                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 843         if (rate_n_flags & RATE_MCS_SGI_MSK)
 844                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 845         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 846 }
 847
 848 #ifdef CONFIG_IWLWIFI_DEBUG
 849 const char *iwl_get_tx_fail_reason(u32 status)
 850 {
 851 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 852 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 853
 854         switch (status & TX_STATUS_MSK) {
 855         case TX_STATUS_SUCCESS:
 856                 return "SUCCESS";
 857         TX_STATUS_POSTPONE(DELAY);
 858         TX_STATUS_POSTPONE(FEW_BYTES);
 859         TX_STATUS_POSTPONE(BT_PRIO);
 860         TX_STATUS_POSTPONE(QUIET_PERIOD);
 861         TX_STATUS_POSTPONE(CALC_TTAK);
 862         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 863         TX_STATUS_FAIL(SHORT_LIMIT);
 864         TX_STATUS_FAIL(LONG_LIMIT);
 865         TX_STATUS_FAIL(FIFO_UNDERRUN);
 866         TX_STATUS_FAIL(DRAIN_FLOW);
 867         TX_STATUS_FAIL(RFKILL_FLUSH);
 868         TX_STATUS_FAIL(LIFE_EXPIRE);
 869         TX_STATUS_FAIL(DEST_PS);
 870         TX_STATUS_FAIL(HOST_ABORTED);
 871         TX_STATUS_FAIL(BT_RETRY);
 872         TX_STATUS_FAIL(STA_INVALID);
 873         TX_STATUS_FAIL(FRAG_DROPPED);
 874         TX_STATUS_FAIL(TID_DISABLE);
 875         TX_STATUS_FAIL(FIFO_FLUSHED);
 876         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 877         TX_STATUS_FAIL(PASSIVE_NO_RX);
 878         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 879         }
 880
 881         return "UNKNOWN";
 882
 883 #undef TX_STATUS_FAIL
 884 #undef TX_STATUS_POSTPONE
 885 }
 886 #endif /* CONFIG_IWLWIFI_DEBUG */
 887
 888 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 889 {
 890         status &= AGG_TX_STATUS_MSK;
 891
 892         switch (status) {
 893         case AGG_TX_STATE_UNDERRUN_MSK:
 894                 priv->reply_agg_tx_stats.underrun++;
 895                 break;
 896         case AGG_TX_STATE_BT_PRIO_MSK:
 897                 priv->reply_agg_tx_stats.bt_prio++;
 898                 break;
 899         case AGG_TX_STATE_FEW_BYTES_MSK:
 900                 priv->reply_agg_tx_stats.few_bytes++;
 901                 break;
 902         case AGG_TX_STATE_ABORT_MSK:
 903                 priv->reply_agg_tx_stats.abort++;
 904                 break;
 905         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 906                 priv->reply_agg_tx_stats.last_sent_ttl++;
 907                 break;
 908         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 909                 priv->reply_agg_tx_stats.last_sent_try++;
 910                 break;
 911         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 912                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 913                 break;
 914         case AGG_TX_STATE_SCD_QUERY_MSK:
 915                 priv->reply_agg_tx_stats.scd_query++;
 916                 break;
 917         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 918                 priv->reply_agg_tx_stats.bad_crc32++;
 919                 break;
 920         case AGG_TX_STATE_RESPONSE_MSK:
 921                 priv->reply_agg_tx_stats.response++;
 922                 break;
 923         case AGG_TX_STATE_DUMP_TX_MSK:
 924                 priv->reply_agg_tx_stats.dump_tx++;
 925                 break;
 926         case AGG_TX_STATE_DELAY_TX_MSK:
 927                 priv->reply_agg_tx_stats.delay_tx++;
 928                 break;
 929         default:
 930                 priv->reply_agg_tx_stats.unknown++;
 931                 break;
 932         }
 933 }
 934
 935 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 936 {
 937         return le32_to_cpup((__le32 *)&tx_resp->status +
 938                             tx_resp->frame_count) & IEEE80211_MAX_SN;
 939 }
 940
 941 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 942                                 struct iwlagn_tx_resp *tx_resp)
 943 {
 944         struct agg_tx_status *frame_status = &tx_resp->status;
 945         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 946                 IWLAGN_TX_RES_TID_POS;
 947         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 948                 IWLAGN_TX_RES_RA_POS;
 949         struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
 950         u32 status = le16_to_cpu(tx_resp->status.status);
 951         int i;
 952
 953         WARN_ON(tid == IWL_TID_NON_QOS);
 954
 955         if (agg->wait_for_ba)
 956                 IWL_DEBUG_TX_REPLY(priv,
 957                         "got tx response w/o block-ack\n");
 958
 959         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 960         agg->wait_for_ba = (tx_resp->frame_count > 1);
 961
 962         /*
 963          * If the BT kill count is non-zero, we'll get this
 964          * notification again.
 965          */
 966         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 967             priv->lib->bt_params &&
 968             priv->lib->bt_params->advanced_bt_coexist) {
 969                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 970         }
 971
 972         if (tx_resp->frame_count == 1)
 973                 return;
 974
 975         IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
 976                            agg->txq_id,
 977                            le32_to_cpu(tx_resp->rate_n_flags),
 978                            iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
 979
 980         /* Construct bit-map of pending frames within Tx window */
 981         for (i = 0; i < tx_resp->frame_count; i++) {
 982                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 983                 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
 984
 985                 if (status & AGG_TX_STATUS_MSK)
 986                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 987
 988                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 989                               AGG_TX_STATE_ABORT_MSK))
 990                         continue;
 991
 992                 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
 993                         IWL_DEBUG_TX_REPLY(priv,
 994                                            "%d: status %s (0x%04x), try-count (0x%01x)\n",
 995                                            i,
 996                                            iwl_get_agg_tx_fail_reason(fstatus),
 997                                            fstatus & AGG_TX_STATUS_MSK,
 998                                            retry_cnt);
 999         }
1000 }
1001
1002 #ifdef CONFIG_IWLWIFI_DEBUG
1003 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
1004
1005 const char *iwl_get_agg_tx_fail_reason(u16 status)
1006 {
1007         status &= AGG_TX_STATUS_MSK;
1008         switch (status) {
1009         case AGG_TX_STATE_TRANSMITTED:
1010                 return "SUCCESS";
1011                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1012                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1013                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1014                 AGG_TX_STATE_FAIL(ABORT_MSK);
1015                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1016                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1017                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1018                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1019                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1020                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1021                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1022                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1023         }
1024
1025         return "UNKNOWN";
1026 }
1027 #endif /* CONFIG_IWLWIFI_DEBUG */
1028
1029 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1030 {
1031         status &= TX_STATUS_MSK;
1032
1033         switch (status) {
1034         case TX_STATUS_POSTPONE_DELAY:
1035                 priv->reply_tx_stats.pp_delay++;
1036                 break;
1037         case TX_STATUS_POSTPONE_FEW_BYTES:
1038                 priv->reply_tx_stats.pp_few_bytes++;
1039                 break;
1040         case TX_STATUS_POSTPONE_BT_PRIO:
1041                 priv->reply_tx_stats.pp_bt_prio++;
1042                 break;
1043         case TX_STATUS_POSTPONE_QUIET_PERIOD:
1044                 priv->reply_tx_stats.pp_quiet_period++;
1045                 break;
1046         case TX_STATUS_POSTPONE_CALC_TTAK:
1047                 priv->reply_tx_stats.pp_calc_ttak++;
1048                 break;
1049         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1050                 priv->reply_tx_stats.int_crossed_retry++;
1051                 break;
1052         case TX_STATUS_FAIL_SHORT_LIMIT:
1053                 priv->reply_tx_stats.short_limit++;
1054                 break;
1055         case TX_STATUS_FAIL_LONG_LIMIT:
1056                 priv->reply_tx_stats.long_limit++;
1057                 break;
1058         case TX_STATUS_FAIL_FIFO_UNDERRUN:
1059                 priv->reply_tx_stats.fifo_underrun++;
1060                 break;
1061         case TX_STATUS_FAIL_DRAIN_FLOW:
1062                 priv->reply_tx_stats.drain_flow++;
1063                 break;
1064         case TX_STATUS_FAIL_RFKILL_FLUSH:
1065                 priv->reply_tx_stats.rfkill_flush++;
1066                 break;
1067         case TX_STATUS_FAIL_LIFE_EXPIRE:
1068                 priv->reply_tx_stats.life_expire++;
1069                 break;
1070         case TX_STATUS_FAIL_DEST_PS:
1071                 priv->reply_tx_stats.dest_ps++;
1072                 break;
1073         case TX_STATUS_FAIL_HOST_ABORTED:
1074                 priv->reply_tx_stats.host_abort++;
1075                 break;
1076         case TX_STATUS_FAIL_BT_RETRY:
1077                 priv->reply_tx_stats.bt_retry++;
1078                 break;
1079         case TX_STATUS_FAIL_STA_INVALID:
1080                 priv->reply_tx_stats.sta_invalid++;
1081                 break;
1082         case TX_STATUS_FAIL_FRAG_DROPPED:
1083                 priv->reply_tx_stats.frag_drop++;
1084                 break;
1085         case TX_STATUS_FAIL_TID_DISABLE:
1086                 priv->reply_tx_stats.tid_disable++;
1087                 break;
1088         case TX_STATUS_FAIL_FIFO_FLUSHED:
1089                 priv->reply_tx_stats.fifo_flush++;
1090                 break;
1091         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1092                 priv->reply_tx_stats.insuff_cf_poll++;
1093                 break;
1094         case TX_STATUS_FAIL_PASSIVE_NO_RX:
1095                 priv->reply_tx_stats.fail_hw_drop++;
1096                 break;
1097         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1098                 priv->reply_tx_stats.sta_color_mismatch++;
1099                 break;
1100         default:
1101                 priv->reply_tx_stats.unknown++;
1102                 break;
1103         }
1104 }
1105
1106 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1107                                  struct ieee80211_tx_info *info,
1108                                  struct iwlagn_tx_resp *tx_resp)
1109 {
1110         u16 status = le16_to_cpu(tx_resp->status.status);
1111
1112         info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1113
1114         info->status.rates[0].count = tx_resp->failure_frame + 1;
1115         info->flags |= iwl_tx_status_to_mac80211(status);
1116         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1117                                     info);
1118         if (!iwl_is_tx_success(status))
1119                 iwlagn_count_tx_err_status(priv, status);
1120 }
1121
1122 static void iwl_check_abort_status(struct iwl_priv *priv,
1123                             u8 frame_count, u32 status)
1124 {
1125         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1126                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1127                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1128                         queue_work(priv->workqueue, &priv->tx_flush);
1129         }
1130 }
1131
1132 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1133 {
1134         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1135         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1136         int txq_id = SEQ_TO_QUEUE(sequence);
1137         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1138         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1139         struct ieee80211_hdr *hdr;
1140         u32 status = le16_to_cpu(tx_resp->status.status);
1141         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1142         int tid;
1143         int sta_id;
1144         int freed;
1145         struct ieee80211_tx_info *info;
1146         struct sk_buff_head skbs;
1147         struct sk_buff *skb;
1148         struct iwl_rxon_context *ctx;
1149         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1150
1151         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1152                 IWLAGN_TX_RES_TID_POS;
1153         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1154                 IWLAGN_TX_RES_RA_POS;
1155
1156         spin_lock_bh(&priv->sta_lock);
1157
1158         if (is_agg) {
1159                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1160                              tid >= IWL_MAX_TID_COUNT);
1161                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1162                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1163                                 priv->tid_data[sta_id][tid].agg.txq_id);
1164                 iwl_rx_reply_tx_agg(priv, tx_resp);
1165         }
1166
1167         __skb_queue_head_init(&skbs);
1168
1169         if (tx_resp->frame_count == 1) {
1170                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1171                 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1172
1173                 if (is_agg) {
1174                         /* If this is an aggregation queue, we can rely on the
1175                          * ssn since the wifi sequence number corresponds to
1176                          * the index in the TFD ring (%256).
1177                          * The seq_ctl is the sequence control of the packet
1178                          * to which this Tx response relates. But if there is a
1179                          * hole in the bitmap of the BA we received, this Tx
1180                          * response may allow to reclaim the hole and all the
1181                          * subsequent packets that were already acked.
1182                          * In that case, seq_ctl != ssn, and the next packet
1183                          * to be reclaimed will be ssn and not seq_ctl.
1184                          */
1185                         next_reclaimed = ssn;
1186                 }
1187
1188                 if (tid != IWL_TID_NON_QOS) {
1189                         priv->tid_data[sta_id][tid].next_reclaimed =
1190                                 next_reclaimed;
1191                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1192                                                   next_reclaimed);
1193                 }
1194
1195                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1196
1197                 iwlagn_check_ratid_empty(priv, sta_id, tid);
1198                 freed = 0;
1199
1200                 /* process frames */
1201                 skb_queue_walk(&skbs, skb) {
1202                         hdr = (struct ieee80211_hdr *)skb->data;
1203
1204                         if (!ieee80211_is_data_qos(hdr->frame_control))
1205                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1206
1207                         info = IEEE80211_SKB_CB(skb);
1208                         ctx = info->driver_data[0];
1209                         iwl_trans_free_tx_cmd(priv->trans,
1210                                               info->driver_data[1]);
1211
1212                         memset(&info->status, 0, sizeof(info->status));
1213
1214                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1215                             ctx->vif &&
1216                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1217                                 /* block and stop all queues */
1218                                 priv->passive_no_rx = true;
1219                                 IWL_DEBUG_TX_QUEUES(priv,
1220                                         "stop all queues: passive channel\n");
1221                                 ieee80211_stop_queues(priv->hw);
1222
1223                                 IWL_DEBUG_TX_REPLY(priv,
1224                                            "TXQ %d status %s (0x%08x) "
1225                                            "rate_n_flags 0x%x retries %d\n",
1226                                            txq_id,
1227                                            iwl_get_tx_fail_reason(status),
1228                                            status,
1229                                            le32_to_cpu(tx_resp->rate_n_flags),
1230                                            tx_resp->failure_frame);
1231
1232                                 IWL_DEBUG_TX_REPLY(priv,
1233                                            "FrameCnt = %d, idx=%d\n",
1234                                            tx_resp->frame_count, cmd_index);
1235                         }
1236
1237                         /* check if BAR is needed */
1238                         if (is_agg && !iwl_is_tx_success(status))
1239                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1240                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1241                                      tx_resp);
1242                         if (!is_agg)
1243                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1244
1245                         freed++;
1246                 }
1247
1248                 if (tid != IWL_TID_NON_QOS) {
1249                         priv->tid_data[sta_id][tid].next_reclaimed =
1250                                 next_reclaimed;
1251                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1252                                            next_reclaimed);
1253                 }
1254
1255                 if (!is_agg && freed != 1)
1256                         IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1257
1258                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1259                                    iwl_get_tx_fail_reason(status), status);
1260
1261                 IWL_DEBUG_TX_REPLY(priv,
1262                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1263                                    le32_to_cpu(tx_resp->rate_n_flags),
1264                                    tx_resp->failure_frame,
1265                                    SEQ_TO_INDEX(sequence), ssn,
1266                                    le16_to_cpu(tx_resp->seq_ctl));
1267         }
1268
1269         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1270         spin_unlock_bh(&priv->sta_lock);
1271
1272         while (!skb_queue_empty(&skbs)) {
1273                 skb = __skb_dequeue(&skbs);
1274                 ieee80211_tx_status(priv->hw, skb);
1275         }
1276 }
1277
1278 /**
1279  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1280  *
1281  * Handles block-acknowledge notification from device, which reports success
1282  * of frames sent via aggregation.
1283  */
1284 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1285                                    struct iwl_rx_cmd_buffer *rxb)
1286 {
1287         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1288         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1289         struct iwl_ht_agg *agg;
1290         struct sk_buff_head reclaimed_skbs;
1291         struct sk_buff *skb;
1292         int sta_id;
1293         int tid;
1294         int freed;
1295
1296         /* "flow" corresponds to Tx queue */
1297         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1298
1299         /* "ssn" is start of block-ack Tx window, corresponds to index
1300          * (in Tx queue's circular buffer) of first TFD/frame in window */
1301         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1302
1303         if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1304                 IWL_ERR(priv,
1305                         "BUG_ON scd_flow is bigger than number of queues\n");
1306                 return;
1307         }
1308
1309         sta_id = ba_resp->sta_id;
1310         tid = ba_resp->tid;
1311         agg = &priv->tid_data[sta_id][tid].agg;
1312
1313         spin_lock_bh(&priv->sta_lock);
1314
1315         if (unlikely(!agg->wait_for_ba)) {
1316                 if (unlikely(ba_resp->bitmap))
1317                         IWL_ERR(priv, "Received BA when not expected\n");
1318                 spin_unlock_bh(&priv->sta_lock);
1319                 return;
1320         }
1321
1322         if (unlikely(scd_flow != agg->txq_id)) {
1323                 /*
1324                  * FIXME: this is a uCode bug which need to be addressed,
1325                  * log the information and return for now.
1326                  * Since it is can possibly happen very often and in order
1327                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1328                  */
1329                 IWL_DEBUG_TX_QUEUES(priv,
1330                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1331                                     scd_flow, sta_id, tid, agg->txq_id);
1332                 spin_unlock_bh(&priv->sta_lock);
1333                 return;
1334         }
1335
1336         __skb_queue_head_init(&reclaimed_skbs);
1337
1338         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1339          * block-ack window (we assume that they've been successfully
1340          * transmitted ... if not, it's too late anyway). */
1341         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1342                           &reclaimed_skbs);
1343
1344         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1345                            "sta_id = %d\n",
1346                            agg->wait_for_ba,
1347                            (u8 *) &ba_resp->sta_addr_lo32,
1348                            ba_resp->sta_id);
1349         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1350                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1351                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1352                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1353                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1354                            ba_resp->txed_2_done);
1355
1356         /* Mark that the expected block-ack response arrived */
1357         agg->wait_for_ba = false;
1358
1359         /* Sanity check values reported by uCode */
1360         if (ba_resp->txed_2_done > ba_resp->txed) {
1361                 IWL_DEBUG_TX_REPLY(priv,
1362                         "bogus sent(%d) and ack(%d) count\n",
1363                         ba_resp->txed, ba_resp->txed_2_done);
1364                 /*
1365                  * set txed_2_done = txed,
1366                  * so it won't impact rate scale
1367                  */
1368                 ba_resp->txed = ba_resp->txed_2_done;
1369         }
1370
1371         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1372
1373         iwlagn_check_ratid_empty(priv, sta_id, tid);
1374         freed = 0;
1375
1376         skb_queue_walk(&reclaimed_skbs, skb) {
1377                 struct ieee80211_hdr *hdr = (void *)skb->data;
1378                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1379
1380                 if (ieee80211_is_data_qos(hdr->frame_control))
1381                         freed++;
1382                 else
1383                         WARN_ON_ONCE(1);
1384
1385                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1386
1387                 memset(&info->status, 0, sizeof(info->status));
1388                 /* Packet was transmitted successfully, failures come as single
1389                  * frames because before failing a frame the firmware transmits
1390                  * it without aggregation at least once.
1391                  */
1392                 info->flags |= IEEE80211_TX_STAT_ACK;
1393
1394                 if (freed == 1) {
1395                         /* this is the first skb we deliver in this batch */
1396                         /* put the rate scaling data there */
1397                         info = IEEE80211_SKB_CB(skb);
1398                         memset(&info->status, 0, sizeof(info->status));
1399                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1400                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1401                         info->status.ampdu_len = ba_resp->txed;
1402                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1403                                                     info);
1404                 }
1405         }
1406
1407         spin_unlock_bh(&priv->sta_lock);
1408
1409         while (!skb_queue_empty(&reclaimed_skbs)) {
1410                 skb = __skb_dequeue(&reclaimed_skbs);
1411                 ieee80211_tx_status(priv->hw, skb);
1412         }
1413 }