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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
   5  * Copyright (C) 2019 Intel Corporation
   6  *
   7  * Contact Information:
   8  *  Intel Linux Wireless <linuxwifi@intel.com>
   9  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  10  *
  11  *****************************************************************************/
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/sched.h>
  16 #include <linux/ieee80211.h>
  17 #include "iwl-io.h"
  18 #include "iwl-trans.h"
  19 #include "iwl-agn-hw.h"
  20 #include "dev.h"
  21 #include "agn.h"
  22
  23 static const u8 tid_to_ac[] = {
  24         IEEE80211_AC_BE,
  25         IEEE80211_AC_BK,
  26         IEEE80211_AC_BK,
  27         IEEE80211_AC_BE,
  28         IEEE80211_AC_VI,
  29         IEEE80211_AC_VI,
  30         IEEE80211_AC_VO,
  31         IEEE80211_AC_VO,
  32 };
  33
  34 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
  35                                      struct ieee80211_tx_info *info,
  36                                      __le16 fc, __le32 *tx_flags)
  37 {
  38         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
  39             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
  40             info->flags & IEEE80211_TX_CTL_AMPDU)
  41                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
  42 }
  43
  44 /*
  45  * handle build REPLY_TX command notification.
  46  */
  47 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
  48                                       struct sk_buff *skb,
  49                                       struct iwl_tx_cmd *tx_cmd,
  50                                       struct ieee80211_tx_info *info,
  51                                       struct ieee80211_hdr *hdr, u8 sta_id)
  52 {
  53         __le16 fc = hdr->frame_control;
  54         __le32 tx_flags = tx_cmd->tx_flags;
  55
  56         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
  57
  58         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  59                 tx_flags |= TX_CMD_FLG_ACK_MSK;
  60         else
  61                 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
  62
  63         if (ieee80211_is_probe_resp(fc))
  64                 tx_flags |= TX_CMD_FLG_TSF_MSK;
  65         else if (ieee80211_is_back_req(fc))
  66                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
  67         else if (info->band == NL80211_BAND_2GHZ &&
  68                  priv->lib->bt_params &&
  69                  priv->lib->bt_params->advanced_bt_coexist &&
  70                  (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
  71                  ieee80211_is_reassoc_req(fc) ||
  72                  info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
  73                 tx_flags |= TX_CMD_FLG_IGNORE_BT;
  74
  75
  76         tx_cmd->sta_id = sta_id;
  77         if (ieee80211_has_morefrags(fc))
  78                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
  79
  80         if (ieee80211_is_data_qos(fc)) {
  81                 u8 *qc = ieee80211_get_qos_ctl(hdr);
  82                 tx_cmd->tid_tspec = qc[0] & 0xf;
  83                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  84         } else {
  85                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
  86                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
  87                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
  88                 else
  89                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  90         }
  91
  92         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
  93
  94         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
  95         if (ieee80211_is_mgmt(fc)) {
  96                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
  97                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
  98                 else
  99                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 100         } else {
 101                 tx_cmd->timeout.pm_frame_timeout = 0;
 102         }
 103
 104         tx_cmd->driver_txop = 0;
 105         tx_cmd->tx_flags = tx_flags;
 106         tx_cmd->next_frame_len = 0;
 107 }
 108
 109 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 110                                      struct iwl_tx_cmd *tx_cmd,
 111                                      struct ieee80211_tx_info *info,
 112                                      struct ieee80211_sta *sta,
 113                                      __le16 fc)
 114 {
 115         u32 rate_flags;
 116         int rate_idx;
 117         u8 rts_retry_limit;
 118         u8 data_retry_limit;
 119         u8 rate_plcp;
 120
 121         if (priv->wowlan) {
 122                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 123                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 124         } else {
 125                 /* Set retry limit on RTS packets */
 126                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 127
 128                 /* Set retry limit on DATA packets and Probe Responses*/
 129                 if (ieee80211_is_probe_resp(fc)) {
 130                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 131                         rts_retry_limit =
 132                                 min(data_retry_limit, rts_retry_limit);
 133                 } else if (ieee80211_is_back_req(fc))
 134                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 135                 else
 136                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 137         }
 138
 139         tx_cmd->data_retry_limit = data_retry_limit;
 140         tx_cmd->rts_retry_limit = rts_retry_limit;
 141
 142         /* DATA packets will use the uCode station table for rate/antenna
 143          * selection */
 144         if (ieee80211_is_data(fc)) {
 145                 tx_cmd->initial_rate_index = 0;
 146                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 147                 return;
 148         } else if (ieee80211_is_back_req(fc))
 149                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 150
 151         /**
 152          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 153          * not really a TX rate.  Thus, we use the lowest supported rate for
 154          * this band.  Also use the lowest supported rate if the stored rate
 155          * index is invalid.
 156          */
 157         rate_idx = info->control.rates[0].idx;
 158         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 159                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 160                 rate_idx = rate_lowest_index(
 161                                 &priv->nvm_data->bands[info->band], sta);
 162         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 163         if (info->band == NL80211_BAND_5GHZ)
 164                 rate_idx += IWL_FIRST_OFDM_RATE;
 165         /* Get PLCP rate for tx_cmd->rate_n_flags */
 166         rate_plcp = iwl_rates[rate_idx].plcp;
 167         /* Zero out flags for this packet */
 168         rate_flags = 0;
 169
 170         /* Set CCK flag as needed */
 171         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 172                 rate_flags |= RATE_MCS_CCK_MSK;
 173
 174         /* Set up antennas */
 175         if (priv->lib->bt_params &&
 176             priv->lib->bt_params->advanced_bt_coexist &&
 177             priv->bt_full_concurrent) {
 178                 /* operated as 1x1 in full concurrency mode */
 179                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 180                                 first_antenna(priv->nvm_data->valid_tx_ant));
 181         } else
 182                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
 183                                         priv, priv->mgmt_tx_ant,
 184                                         priv->nvm_data->valid_tx_ant);
 185         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 186
 187         /* Set the rate in the TX cmd */
 188         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 189 }
 190
 191 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 192                                          struct ieee80211_tx_info *info,
 193                                          struct iwl_tx_cmd *tx_cmd,
 194                                          struct sk_buff *skb_frag)
 195 {
 196         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 197
 198         switch (keyconf->cipher) {
 199         case WLAN_CIPHER_SUITE_CCMP:
 200                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 201                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 202                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 203                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 204                 break;
 205
 206         case WLAN_CIPHER_SUITE_TKIP:
 207                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 208                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 209                 break;
 210
 211         case WLAN_CIPHER_SUITE_WEP104:
 212                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 213                 /* fall through */
 214         case WLAN_CIPHER_SUITE_WEP40:
 215                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 216                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 217
 218                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 219
 220                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 221                              "with key %d\n", keyconf->keyidx);
 222                 break;
 223
 224         default:
 225                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 226                 break;
 227         }
 228 }
 229
 230 /**
 231  * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
 232  * @context: the current context
 233  * @sta: mac80211 station
 234  *
 235  * In certain circumstances mac80211 passes a station pointer
 236  * that may be %NULL, for example during TX or key setup. In
 237  * that case, we need to use the broadcast station, so this
 238  * inline wraps that pattern.
 239  */
 240 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
 241                                    struct ieee80211_sta *sta)
 242 {
 243         int sta_id;
 244
 245         if (!sta)
 246                 return context->bcast_sta_id;
 247
 248         sta_id = iwl_sta_id(sta);
 249
 250         /*
 251          * mac80211 should not be passing a partially
 252          * initialised station!
 253          */
 254         WARN_ON(sta_id == IWL_INVALID_STATION);
 255
 256         return sta_id;
 257 }
 258
 259 /*
 260  * start REPLY_TX command process
 261  */
 262 int iwlagn_tx_skb(struct iwl_priv *priv,
 263                   struct ieee80211_sta *sta,
 264                   struct sk_buff *skb)
 265 {
 266         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 267         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 268         struct iwl_station_priv *sta_priv = NULL;
 269         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 270         struct iwl_device_cmd *dev_cmd;
 271         struct iwl_tx_cmd *tx_cmd;
 272         __le16 fc;
 273         u8 hdr_len;
 274         u16 len, seq_number = 0;
 275         u8 sta_id, tid = IWL_MAX_TID_COUNT;
 276         bool is_agg = false, is_data_qos = false;
 277         int txq_id;
 278
 279         if (info->control.vif)
 280                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 281
 282         if (iwl_is_rfkill(priv)) {
 283                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 284                 goto drop_unlock_priv;
 285         }
 286
 287         fc = hdr->frame_control;
 288
 289 #ifdef CONFIG_IWLWIFI_DEBUG
 290         if (ieee80211_is_auth(fc))
 291                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 292         else if (ieee80211_is_assoc_req(fc))
 293                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 294         else if (ieee80211_is_reassoc_req(fc))
 295                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 296 #endif
 297
 298         if (unlikely(ieee80211_is_probe_resp(fc))) {
 299                 struct iwl_wipan_noa_data *noa_data =
 300                         rcu_dereference(priv->noa_data);
 301
 302                 if (noa_data &&
 303                     pskb_expand_head(skb, 0, noa_data->length,
 304                                      GFP_ATOMIC) == 0) {
 305                         skb_put_data(skb, noa_data->data, noa_data->length);
 306                         hdr = (struct ieee80211_hdr *)skb->data;
 307                 }
 308         }
 309
 310         hdr_len = ieee80211_hdrlen(fc);
 311
 312         /* For management frames use broadcast id to do not break aggregation */
 313         if (!ieee80211_is_data(fc))
 314                 sta_id = ctx->bcast_sta_id;
 315         else {
 316                 /* Find index into station table for destination station */
 317                 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
 318                 if (sta_id == IWL_INVALID_STATION) {
 319                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 320                                        hdr->addr1);
 321                         goto drop_unlock_priv;
 322                 }
 323         }
 324
 325         if (sta)
 326                 sta_priv = (void *)sta->drv_priv;
 327
 328         if (sta_priv && sta_priv->asleep &&
 329             (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
 330                 /*
 331                  * This sends an asynchronous command to the device,
 332                  * but we can rely on it being processed before the
 333                  * next frame is processed -- and the next frame to
 334                  * this station is the one that will consume this
 335                  * counter.
 336                  * For now set the counter to just 1 since we do not
 337                  * support uAPSD yet.
 338                  *
 339                  * FIXME: If we get two non-bufferable frames one
 340                  * after the other, we might only send out one of
 341                  * them because this is racy.
 342                  */
 343                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 344         }
 345
 346         dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
 347
 348         if (unlikely(!dev_cmd))
 349                 goto drop_unlock_priv;
 350
 351         memset(dev_cmd, 0, sizeof(*dev_cmd));
 352         dev_cmd->hdr.cmd = REPLY_TX;
 353         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 354
 355         /* Total # bytes to be transmitted */
 356         len = (u16)skb->len;
 357         tx_cmd->len = cpu_to_le16(len);
 358
 359         if (info->control.hw_key)
 360                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
 361
 362         /* TODO need this for burst mode later on */
 363         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 364
 365         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
 366
 367         memset(&info->status, 0, sizeof(info->status));
 368         memset(info->driver_data, 0, sizeof(info->driver_data));
 369
 370         info->driver_data[0] = ctx;
 371         info->driver_data[1] = dev_cmd;
 372         /* From now on, we cannot access info->control */
 373
 374         spin_lock(&priv->sta_lock);
 375
 376         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
 377                 u8 *qc = NULL;
 378                 struct iwl_tid_data *tid_data;
 379                 qc = ieee80211_get_qos_ctl(hdr);
 380                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 381                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 382                         goto drop_unlock_sta;
 383                 tid_data = &priv->tid_data[sta_id][tid];
 384
 385                 /* aggregation is on for this <sta,tid> */
 386                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 387                     tid_data->agg.state != IWL_AGG_ON) {
 388                         IWL_ERR(priv,
 389                                 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
 390                                 info->flags, tid_data->agg.state);
 391                         IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
 392                                 sta_id, tid,
 393                                 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
 394                         goto drop_unlock_sta;
 395                 }
 396
 397                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 398                  * only. Check this here.
 399                  */
 400                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 401                               tid_data->agg.state != IWL_AGG_OFF,
 402                               "Tx while agg.state = %d\n", tid_data->agg.state))
 403                         goto drop_unlock_sta;
 404
 405                 seq_number = tid_data->seq_number;
 406                 seq_number &= IEEE80211_SCTL_SEQ;
 407                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 408                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 409                 seq_number += 0x10;
 410
 411                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 412                         is_agg = true;
 413                 is_data_qos = true;
 414         }
 415
 416         /* Copy MAC header from skb into command buffer */
 417         memcpy(tx_cmd->hdr, hdr, hdr_len);
 418
 419         txq_id = info->hw_queue;
 420
 421         if (is_agg)
 422                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 423         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 424                 /*
 425                  * The microcode will clear the more data
 426                  * bit in the last frame it transmits.
 427                  */
 428                 hdr->frame_control |=
 429                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 430         }
 431
 432         WARN_ON_ONCE(is_agg &&
 433                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 434
 435         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 436                      txq_id, seq_number);
 437
 438         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 439                 goto drop_unlock_sta;
 440
 441         if (is_data_qos && !ieee80211_has_morefrags(fc))
 442                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 443
 444         spin_unlock(&priv->sta_lock);
 445
 446         /*
 447          * Avoid atomic ops if it isn't an associated client.
 448          * Also, if this is a packet for aggregation, don't
 449          * increase the counter because the ucode will stop
 450          * aggregation queues when their respective station
 451          * goes to sleep.
 452          */
 453         if (sta_priv && sta_priv->client && !is_agg)
 454                 atomic_inc(&sta_priv->pending_frames);
 455
 456         return 0;
 457
 458 drop_unlock_sta:
 459         if (dev_cmd)
 460                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 461         spin_unlock(&priv->sta_lock);
 462 drop_unlock_priv:
 463         return -1;
 464 }
 465
 466 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 467 {
 468         int q;
 469
 470         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 471              q < priv->trans->trans_cfg->base_params->num_of_queues; q++) {
 472                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 473                         priv->queue_to_mac80211[q] = mq;
 474                         return q;
 475                 }
 476         }
 477
 478         return -ENOSPC;
 479 }
 480
 481 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 482 {
 483         clear_bit(q, priv->agg_q_alloc);
 484         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 485 }
 486
 487 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 488                         struct ieee80211_sta *sta, u16 tid)
 489 {
 490         struct iwl_tid_data *tid_data;
 491         int sta_id, txq_id;
 492         enum iwl_agg_state agg_state;
 493
 494         sta_id = iwl_sta_id(sta);
 495
 496         if (sta_id == IWL_INVALID_STATION) {
 497                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 498                 return -ENXIO;
 499         }
 500
 501         spin_lock_bh(&priv->sta_lock);
 502
 503         tid_data = &priv->tid_data[sta_id][tid];
 504         txq_id = tid_data->agg.txq_id;
 505
 506         switch (tid_data->agg.state) {
 507         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 508                 /*
 509                 * This can happen if the peer stops aggregation
 510                 * again before we've had a chance to drain the
 511                 * queue we selected previously, i.e. before the
 512                 * session was really started completely.
 513                 */
 514                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 515                 goto turn_off;
 516         case IWL_AGG_STARTING:
 517                 /*
 518                  * This can happen when the session is stopped before
 519                  * we receive ADDBA response
 520                  */
 521                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 522                 goto turn_off;
 523         case IWL_AGG_ON:
 524                 break;
 525         default:
 526                 IWL_WARN(priv,
 527                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 528                          sta_id, tid, tid_data->agg.state);
 529                 spin_unlock_bh(&priv->sta_lock);
 530                 return 0;
 531         }
 532
 533         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 534
 535         /* There are still packets for this RA / TID in the HW */
 536         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 537                 IWL_DEBUG_TX_QUEUES(priv,
 538                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 539                         sta_id, tid, txq_id);
 540         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 541                 IWL_DEBUG_TX_QUEUES(priv,
 542                                     "Can't proceed: ssn %d, next_recl = %d\n",
 543                                     tid_data->agg.ssn,
 544                                     tid_data->next_reclaimed);
 545                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 546                 spin_unlock_bh(&priv->sta_lock);
 547                 return 0;
 548         }
 549
 550         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 551                             tid_data->agg.ssn);
 552 turn_off:
 553         agg_state = tid_data->agg.state;
 554         tid_data->agg.state = IWL_AGG_OFF;
 555
 556         spin_unlock_bh(&priv->sta_lock);
 557
 558         if (test_bit(txq_id, priv->agg_q_alloc)) {
 559                 /*
 560                  * If the transport didn't know that we wanted to start
 561                  * agreggation, don't tell it that we want to stop them.
 562                  * This can happen when we don't get the addBA response on
 563                  * time, or we hadn't time to drain the AC queues.
 564                  */
 565                 if (agg_state == IWL_AGG_ON)
 566                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 567                 else
 568                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 569                                             agg_state);
 570                 iwlagn_dealloc_agg_txq(priv, txq_id);
 571         }
 572
 573         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 574
 575         return 0;
 576 }
 577
 578 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 579                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 580 {
 581         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 582         struct iwl_tid_data *tid_data;
 583         int sta_id, txq_id, ret;
 584
 585         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 586                      sta->addr, tid);
 587
 588         sta_id = iwl_sta_id(sta);
 589         if (sta_id == IWL_INVALID_STATION) {
 590                 IWL_ERR(priv, "Start AGG on invalid station\n");
 591                 return -ENXIO;
 592         }
 593         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 594                 return -EINVAL;
 595
 596         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 597                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 598                 return -ENXIO;
 599         }
 600
 601         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 602         if (txq_id < 0) {
 603                 IWL_DEBUG_TX_QUEUES(priv,
 604                         "No free aggregation queue for %pM/%d\n",
 605                         sta->addr, tid);
 606                 return txq_id;
 607         }
 608
 609         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 610         if (ret)
 611                 return ret;
 612
 613         spin_lock_bh(&priv->sta_lock);
 614         tid_data = &priv->tid_data[sta_id][tid];
 615         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 616         tid_data->agg.txq_id = txq_id;
 617
 618         *ssn = tid_data->agg.ssn;
 619
 620         if (*ssn == tid_data->next_reclaimed) {
 621                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 622                                     tid_data->agg.ssn);
 623                 tid_data->agg.state = IWL_AGG_STARTING;
 624                 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
 625         } else {
 626                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 627                                     "next_reclaimed = %d\n",
 628                                     tid_data->agg.ssn,
 629                                     tid_data->next_reclaimed);
 630                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 631         }
 632         spin_unlock_bh(&priv->sta_lock);
 633
 634         return ret;
 635 }
 636
 637 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
 638                         struct ieee80211_sta *sta, u16 tid)
 639 {
 640         struct iwl_tid_data *tid_data;
 641         enum iwl_agg_state agg_state;
 642         int sta_id, txq_id;
 643         sta_id = iwl_sta_id(sta);
 644
 645         /*
 646          * First set the agg state to OFF to avoid calling
 647          * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
 648          */
 649         spin_lock_bh(&priv->sta_lock);
 650
 651         tid_data = &priv->tid_data[sta_id][tid];
 652         txq_id = tid_data->agg.txq_id;
 653         agg_state = tid_data->agg.state;
 654         IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
 655                             sta_id, tid, txq_id, tid_data->agg.state);
 656
 657         tid_data->agg.state = IWL_AGG_OFF;
 658
 659         spin_unlock_bh(&priv->sta_lock);
 660
 661         if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
 662                 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
 663
 664         if (test_bit(txq_id, priv->agg_q_alloc)) {
 665                 /*
 666                  * If the transport didn't know that we wanted to start
 667                  * agreggation, don't tell it that we want to stop them.
 668                  * This can happen when we don't get the addBA response on
 669                  * time, or we hadn't time to drain the AC queues.
 670                  */
 671                 if (agg_state == IWL_AGG_ON)
 672                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 673                 else
 674                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 675                                             agg_state);
 676                 iwlagn_dealloc_agg_txq(priv, txq_id);
 677         }
 678
 679         return 0;
 680 }
 681
 682 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 683                         struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 684 {
 685         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 686         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 687         int q, fifo;
 688         u16 ssn;
 689
 690         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 691
 692         spin_lock_bh(&priv->sta_lock);
 693         ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
 694         q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
 695         priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
 696         spin_unlock_bh(&priv->sta_lock);
 697
 698         fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
 699
 700         iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
 701                              buf_size, ssn, 0);
 702
 703         /*
 704          * If the limit is 0, then it wasn't initialised yet,
 705          * use the default. We can do that since we take the
 706          * minimum below, and we don't want to go above our
 707          * default due to hardware restrictions.
 708          */
 709         if (sta_priv->max_agg_bufsize == 0)
 710                 sta_priv->max_agg_bufsize =
 711                         LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 712
 713         /*
 714          * Even though in theory the peer could have different
 715          * aggregation reorder buffer sizes for different sessions,
 716          * our ucode doesn't allow for that and has a global limit
 717          * for each station. Therefore, use the minimum of all the
 718          * aggregation sessions and our default value.
 719          */
 720         sta_priv->max_agg_bufsize =
 721                 min(sta_priv->max_agg_bufsize, buf_size);
 722
 723         if (priv->hw_params.use_rts_for_aggregation) {
 724                 /*
 725                  * switch to RTS/CTS if it is the prefer protection
 726                  * method for HT traffic
 727                  */
 728
 729                 sta_priv->lq_sta.lq.general_params.flags |=
 730                         LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 731         }
 732         priv->agg_tids_count++;
 733         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 734                      priv->agg_tids_count);
 735
 736         sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 737                 sta_priv->max_agg_bufsize;
 738
 739         IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 740                  sta->addr, tid);
 741
 742         return iwl_send_lq_cmd(priv, ctx,
 743                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 744 }
 745
 746 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
 747 {
 748         struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
 749         enum iwl_rxon_context_id ctx;
 750         struct ieee80211_vif *vif;
 751         u8 *addr;
 752
 753         lockdep_assert_held(&priv->sta_lock);
 754
 755         addr = priv->stations[sta_id].sta.sta.addr;
 756         ctx = priv->stations[sta_id].ctxid;
 757         vif = priv->contexts[ctx].vif;
 758
 759         switch (priv->tid_data[sta_id][tid].agg.state) {
 760         case IWL_EMPTYING_HW_QUEUE_DELBA:
 761                 /* There are no packets for this RA / TID in the HW any more */
 762                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 763                         IWL_DEBUG_TX_QUEUES(priv,
 764                                 "Can continue DELBA flow ssn = next_recl = %d\n",
 765                                 tid_data->next_reclaimed);
 766                         iwl_trans_txq_disable(priv->trans,
 767                                               tid_data->agg.txq_id, true);
 768                         iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
 769                         tid_data->agg.state = IWL_AGG_OFF;
 770                         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 771                 }
 772                 break;
 773         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 774                 /* There are no packets for this RA / TID in the HW any more */
 775                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 776                         IWL_DEBUG_TX_QUEUES(priv,
 777                                 "Can continue ADDBA flow ssn = next_recl = %d\n",
 778                                 tid_data->next_reclaimed);
 779                         tid_data->agg.state = IWL_AGG_STARTING;
 780                         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
 781                 }
 782                 break;
 783         default:
 784                 break;
 785         }
 786 }
 787
 788 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 789                                      struct iwl_rxon_context *ctx,
 790                                      const u8 *addr1)
 791 {
 792         struct ieee80211_sta *sta;
 793         struct iwl_station_priv *sta_priv;
 794
 795         rcu_read_lock();
 796         sta = ieee80211_find_sta(ctx->vif, addr1);
 797         if (sta) {
 798                 sta_priv = (void *)sta->drv_priv;
 799                 /* avoid atomic ops if this isn't a client */
 800                 if (sta_priv->client &&
 801                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 802                         ieee80211_sta_block_awake(priv->hw, sta, false);
 803         }
 804         rcu_read_unlock();
 805 }
 806
 807 /**
 808  * translate ucode response to mac80211 tx status control values
 809  */
 810 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 811                                   struct ieee80211_tx_info *info)
 812 {
 813         struct ieee80211_tx_rate *r = &info->status.rates[0];
 814
 815         info->status.antenna =
 816                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 817         if (rate_n_flags & RATE_MCS_HT_MSK)
 818                 r->flags |= IEEE80211_TX_RC_MCS;
 819         if (rate_n_flags & RATE_MCS_GF_MSK)
 820                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 821         if (rate_n_flags & RATE_MCS_HT40_MSK)
 822                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 823         if (rate_n_flags & RATE_MCS_DUP_MSK)
 824                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 825         if (rate_n_flags & RATE_MCS_SGI_MSK)
 826                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 827         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 828 }
 829
 830 #ifdef CONFIG_IWLWIFI_DEBUG
 831 const char *iwl_get_tx_fail_reason(u32 status)
 832 {
 833 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 834 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 835
 836         switch (status & TX_STATUS_MSK) {
 837         case TX_STATUS_SUCCESS:
 838                 return "SUCCESS";
 839         TX_STATUS_POSTPONE(DELAY);
 840         TX_STATUS_POSTPONE(FEW_BYTES);
 841         TX_STATUS_POSTPONE(BT_PRIO);
 842         TX_STATUS_POSTPONE(QUIET_PERIOD);
 843         TX_STATUS_POSTPONE(CALC_TTAK);
 844         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 845         TX_STATUS_FAIL(SHORT_LIMIT);
 846         TX_STATUS_FAIL(LONG_LIMIT);
 847         TX_STATUS_FAIL(FIFO_UNDERRUN);
 848         TX_STATUS_FAIL(DRAIN_FLOW);
 849         TX_STATUS_FAIL(RFKILL_FLUSH);
 850         TX_STATUS_FAIL(LIFE_EXPIRE);
 851         TX_STATUS_FAIL(DEST_PS);
 852         TX_STATUS_FAIL(HOST_ABORTED);
 853         TX_STATUS_FAIL(BT_RETRY);
 854         TX_STATUS_FAIL(STA_INVALID);
 855         TX_STATUS_FAIL(FRAG_DROPPED);
 856         TX_STATUS_FAIL(TID_DISABLE);
 857         TX_STATUS_FAIL(FIFO_FLUSHED);
 858         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 859         TX_STATUS_FAIL(PASSIVE_NO_RX);
 860         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 861         }
 862
 863         return "UNKNOWN";
 864
 865 #undef TX_STATUS_FAIL
 866 #undef TX_STATUS_POSTPONE
 867 }
 868 #endif /* CONFIG_IWLWIFI_DEBUG */
 869
 870 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 871 {
 872         status &= AGG_TX_STATUS_MSK;
 873
 874         switch (status) {
 875         case AGG_TX_STATE_UNDERRUN_MSK:
 876                 priv->reply_agg_tx_stats.underrun++;
 877                 break;
 878         case AGG_TX_STATE_BT_PRIO_MSK:
 879                 priv->reply_agg_tx_stats.bt_prio++;
 880                 break;
 881         case AGG_TX_STATE_FEW_BYTES_MSK:
 882                 priv->reply_agg_tx_stats.few_bytes++;
 883                 break;
 884         case AGG_TX_STATE_ABORT_MSK:
 885                 priv->reply_agg_tx_stats.abort++;
 886                 break;
 887         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 888                 priv->reply_agg_tx_stats.last_sent_ttl++;
 889                 break;
 890         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 891                 priv->reply_agg_tx_stats.last_sent_try++;
 892                 break;
 893         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 894                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 895                 break;
 896         case AGG_TX_STATE_SCD_QUERY_MSK:
 897                 priv->reply_agg_tx_stats.scd_query++;
 898                 break;
 899         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 900                 priv->reply_agg_tx_stats.bad_crc32++;
 901                 break;
 902         case AGG_TX_STATE_RESPONSE_MSK:
 903                 priv->reply_agg_tx_stats.response++;
 904                 break;
 905         case AGG_TX_STATE_DUMP_TX_MSK:
 906                 priv->reply_agg_tx_stats.dump_tx++;
 907                 break;
 908         case AGG_TX_STATE_DELAY_TX_MSK:
 909                 priv->reply_agg_tx_stats.delay_tx++;
 910                 break;
 911         default:
 912                 priv->reply_agg_tx_stats.unknown++;
 913                 break;
 914         }
 915 }
 916
 917 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 918 {
 919         return le32_to_cpup((__le32 *)&tx_resp->status +
 920                             tx_resp->frame_count) & IEEE80211_MAX_SN;
 921 }
 922
 923 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 924                                 struct iwlagn_tx_resp *tx_resp)
 925 {
 926         struct agg_tx_status *frame_status = &tx_resp->status;
 927         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 928                 IWLAGN_TX_RES_TID_POS;
 929         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 930                 IWLAGN_TX_RES_RA_POS;
 931         struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
 932         u32 status = le16_to_cpu(tx_resp->status.status);
 933         int i;
 934
 935         WARN_ON(tid == IWL_TID_NON_QOS);
 936
 937         if (agg->wait_for_ba)
 938                 IWL_DEBUG_TX_REPLY(priv,
 939                         "got tx response w/o block-ack\n");
 940
 941         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 942         agg->wait_for_ba = (tx_resp->frame_count > 1);
 943
 944         /*
 945          * If the BT kill count is non-zero, we'll get this
 946          * notification again.
 947          */
 948         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 949             priv->lib->bt_params &&
 950             priv->lib->bt_params->advanced_bt_coexist) {
 951                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 952         }
 953
 954         if (tx_resp->frame_count == 1)
 955                 return;
 956
 957         IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
 958                            agg->txq_id,
 959                            le32_to_cpu(tx_resp->rate_n_flags),
 960                            iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
 961
 962         /* Construct bit-map of pending frames within Tx window */
 963         for (i = 0; i < tx_resp->frame_count; i++) {
 964                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 965                 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
 966
 967                 if (status & AGG_TX_STATUS_MSK)
 968                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 969
 970                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 971                               AGG_TX_STATE_ABORT_MSK))
 972                         continue;
 973
 974                 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
 975                         IWL_DEBUG_TX_REPLY(priv,
 976                                            "%d: status %s (0x%04x), try-count (0x%01x)\n",
 977                                            i,
 978                                            iwl_get_agg_tx_fail_reason(fstatus),
 979                                            fstatus & AGG_TX_STATUS_MSK,
 980                                            retry_cnt);
 981         }
 982 }
 983
 984 #ifdef CONFIG_IWLWIFI_DEBUG
 985 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 986
 987 const char *iwl_get_agg_tx_fail_reason(u16 status)
 988 {
 989         status &= AGG_TX_STATUS_MSK;
 990         switch (status) {
 991         case AGG_TX_STATE_TRANSMITTED:
 992                 return "SUCCESS";
 993                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 994                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 995                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 996                 AGG_TX_STATE_FAIL(ABORT_MSK);
 997                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 998                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 999                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1000                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1001                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1002                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1003                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1004                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1005         }
1006
1007         return "UNKNOWN";
1008 }
1009 #endif /* CONFIG_IWLWIFI_DEBUG */
1010
1011 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1012 {
1013         status &= TX_STATUS_MSK;
1014
1015         switch (status) {
1016         case TX_STATUS_POSTPONE_DELAY:
1017                 priv->reply_tx_stats.pp_delay++;
1018                 break;
1019         case TX_STATUS_POSTPONE_FEW_BYTES:
1020                 priv->reply_tx_stats.pp_few_bytes++;
1021                 break;
1022         case TX_STATUS_POSTPONE_BT_PRIO:
1023                 priv->reply_tx_stats.pp_bt_prio++;
1024                 break;
1025         case TX_STATUS_POSTPONE_QUIET_PERIOD:
1026                 priv->reply_tx_stats.pp_quiet_period++;
1027                 break;
1028         case TX_STATUS_POSTPONE_CALC_TTAK:
1029                 priv->reply_tx_stats.pp_calc_ttak++;
1030                 break;
1031         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1032                 priv->reply_tx_stats.int_crossed_retry++;
1033                 break;
1034         case TX_STATUS_FAIL_SHORT_LIMIT:
1035                 priv->reply_tx_stats.short_limit++;
1036                 break;
1037         case TX_STATUS_FAIL_LONG_LIMIT:
1038                 priv->reply_tx_stats.long_limit++;
1039                 break;
1040         case TX_STATUS_FAIL_FIFO_UNDERRUN:
1041                 priv->reply_tx_stats.fifo_underrun++;
1042                 break;
1043         case TX_STATUS_FAIL_DRAIN_FLOW:
1044                 priv->reply_tx_stats.drain_flow++;
1045                 break;
1046         case TX_STATUS_FAIL_RFKILL_FLUSH:
1047                 priv->reply_tx_stats.rfkill_flush++;
1048                 break;
1049         case TX_STATUS_FAIL_LIFE_EXPIRE:
1050                 priv->reply_tx_stats.life_expire++;
1051                 break;
1052         case TX_STATUS_FAIL_DEST_PS:
1053                 priv->reply_tx_stats.dest_ps++;
1054                 break;
1055         case TX_STATUS_FAIL_HOST_ABORTED:
1056                 priv->reply_tx_stats.host_abort++;
1057                 break;
1058         case TX_STATUS_FAIL_BT_RETRY:
1059                 priv->reply_tx_stats.bt_retry++;
1060                 break;
1061         case TX_STATUS_FAIL_STA_INVALID:
1062                 priv->reply_tx_stats.sta_invalid++;
1063                 break;
1064         case TX_STATUS_FAIL_FRAG_DROPPED:
1065                 priv->reply_tx_stats.frag_drop++;
1066                 break;
1067         case TX_STATUS_FAIL_TID_DISABLE:
1068                 priv->reply_tx_stats.tid_disable++;
1069                 break;
1070         case TX_STATUS_FAIL_FIFO_FLUSHED:
1071                 priv->reply_tx_stats.fifo_flush++;
1072                 break;
1073         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1074                 priv->reply_tx_stats.insuff_cf_poll++;
1075                 break;
1076         case TX_STATUS_FAIL_PASSIVE_NO_RX:
1077                 priv->reply_tx_stats.fail_hw_drop++;
1078                 break;
1079         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1080                 priv->reply_tx_stats.sta_color_mismatch++;
1081                 break;
1082         default:
1083                 priv->reply_tx_stats.unknown++;
1084                 break;
1085         }
1086 }
1087
1088 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1089                                  struct ieee80211_tx_info *info,
1090                                  struct iwlagn_tx_resp *tx_resp)
1091 {
1092         u16 status = le16_to_cpu(tx_resp->status.status);
1093
1094         info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1095
1096         info->status.rates[0].count = tx_resp->failure_frame + 1;
1097         info->flags |= iwl_tx_status_to_mac80211(status);
1098         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1099                                     info);
1100         if (!iwl_is_tx_success(status))
1101                 iwlagn_count_tx_err_status(priv, status);
1102 }
1103
1104 static void iwl_check_abort_status(struct iwl_priv *priv,
1105                             u8 frame_count, u32 status)
1106 {
1107         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1108                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1109                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1110                         queue_work(priv->workqueue, &priv->tx_flush);
1111         }
1112 }
1113
1114 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1115 {
1116         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1117         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1118         int txq_id = SEQ_TO_QUEUE(sequence);
1119         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1120         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1121         struct ieee80211_hdr *hdr;
1122         u32 status = le16_to_cpu(tx_resp->status.status);
1123         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1124         int tid;
1125         int sta_id;
1126         int freed;
1127         struct ieee80211_tx_info *info;
1128         struct sk_buff_head skbs;
1129         struct sk_buff *skb;
1130         struct iwl_rxon_context *ctx;
1131         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1132
1133         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1134                 IWLAGN_TX_RES_TID_POS;
1135         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1136                 IWLAGN_TX_RES_RA_POS;
1137
1138         spin_lock_bh(&priv->sta_lock);
1139
1140         if (is_agg) {
1141                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1142                              tid >= IWL_MAX_TID_COUNT);
1143                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1144                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1145                                 priv->tid_data[sta_id][tid].agg.txq_id);
1146                 iwl_rx_reply_tx_agg(priv, tx_resp);
1147         }
1148
1149         __skb_queue_head_init(&skbs);
1150
1151         if (tx_resp->frame_count == 1) {
1152                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1153                 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1154
1155                 if (is_agg) {
1156                         /* If this is an aggregation queue, we can rely on the
1157                          * ssn since the wifi sequence number corresponds to
1158                          * the index in the TFD ring (%256).
1159                          * The seq_ctl is the sequence control of the packet
1160                          * to which this Tx response relates. But if there is a
1161                          * hole in the bitmap of the BA we received, this Tx
1162                          * response may allow to reclaim the hole and all the
1163                          * subsequent packets that were already acked.
1164                          * In that case, seq_ctl != ssn, and the next packet
1165                          * to be reclaimed will be ssn and not seq_ctl.
1166                          */
1167                         next_reclaimed = ssn;
1168                 }
1169
1170                 if (tid != IWL_TID_NON_QOS) {
1171                         priv->tid_data[sta_id][tid].next_reclaimed =
1172                                 next_reclaimed;
1173                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1174                                                   next_reclaimed);
1175                         iwlagn_check_ratid_empty(priv, sta_id, tid);
1176                 }
1177
1178                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1179
1180                 freed = 0;
1181
1182                 /* process frames */
1183                 skb_queue_walk(&skbs, skb) {
1184                         hdr = (struct ieee80211_hdr *)skb->data;
1185
1186                         if (!ieee80211_is_data_qos(hdr->frame_control))
1187                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1188
1189                         info = IEEE80211_SKB_CB(skb);
1190                         ctx = info->driver_data[0];
1191                         iwl_trans_free_tx_cmd(priv->trans,
1192                                               info->driver_data[1]);
1193
1194                         memset(&info->status, 0, sizeof(info->status));
1195
1196                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1197                             ctx->vif &&
1198                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1199                                 /* block and stop all queues */
1200                                 priv->passive_no_rx = true;
1201                                 IWL_DEBUG_TX_QUEUES(priv,
1202                                         "stop all queues: passive channel\n");
1203                                 ieee80211_stop_queues(priv->hw);
1204
1205                                 IWL_DEBUG_TX_REPLY(priv,
1206                                            "TXQ %d status %s (0x%08x) "
1207                                            "rate_n_flags 0x%x retries %d\n",
1208                                            txq_id,
1209                                            iwl_get_tx_fail_reason(status),
1210                                            status,
1211                                            le32_to_cpu(tx_resp->rate_n_flags),
1212                                            tx_resp->failure_frame);
1213
1214                                 IWL_DEBUG_TX_REPLY(priv,
1215                                            "FrameCnt = %d, idx=%d\n",
1216                                            tx_resp->frame_count, cmd_index);
1217                         }
1218
1219                         /* check if BAR is needed */
1220                         if (is_agg && !iwl_is_tx_success(status))
1221                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1222                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1223                                      tx_resp);
1224                         if (!is_agg)
1225                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1226
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                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1241                                    iwl_get_tx_fail_reason(status), status);
1242
1243                 IWL_DEBUG_TX_REPLY(priv,
1244                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1245                                    le32_to_cpu(tx_resp->rate_n_flags),
1246                                    tx_resp->failure_frame,
1247                                    SEQ_TO_INDEX(sequence), ssn,
1248                                    le16_to_cpu(tx_resp->seq_ctl));
1249         }
1250
1251         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1252         spin_unlock_bh(&priv->sta_lock);
1253
1254         while (!skb_queue_empty(&skbs)) {
1255                 skb = __skb_dequeue(&skbs);
1256                 ieee80211_tx_status(priv->hw, skb);
1257         }
1258 }
1259
1260 /**
1261  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1262  *
1263  * Handles block-acknowledge notification from device, which reports success
1264  * of frames sent via aggregation.
1265  */
1266 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1267                                    struct iwl_rx_cmd_buffer *rxb)
1268 {
1269         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1270         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1271         struct iwl_ht_agg *agg;
1272         struct sk_buff_head reclaimed_skbs;
1273         struct sk_buff *skb;
1274         int sta_id;
1275         int tid;
1276         int freed;
1277
1278         /* "flow" corresponds to Tx queue */
1279         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1280
1281         /* "ssn" is start of block-ack Tx window, corresponds to index
1282          * (in Tx queue's circular buffer) of first TFD/frame in window */
1283         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1284
1285         if (scd_flow >= priv->trans->trans_cfg->base_params->num_of_queues) {
1286                 IWL_ERR(priv,
1287                         "BUG_ON scd_flow is bigger than number of queues\n");
1288                 return;
1289         }
1290
1291         sta_id = ba_resp->sta_id;
1292         tid = ba_resp->tid;
1293         agg = &priv->tid_data[sta_id][tid].agg;
1294
1295         spin_lock_bh(&priv->sta_lock);
1296
1297         if (unlikely(!agg->wait_for_ba)) {
1298                 if (unlikely(ba_resp->bitmap))
1299                         IWL_ERR(priv, "Received BA when not expected\n");
1300                 spin_unlock_bh(&priv->sta_lock);
1301                 return;
1302         }
1303
1304         if (unlikely(scd_flow != agg->txq_id)) {
1305                 /*
1306                  * FIXME: this is a uCode bug which need to be addressed,
1307                  * log the information and return for now.
1308                  * Since it is can possibly happen very often and in order
1309                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1310                  */
1311                 IWL_DEBUG_TX_QUEUES(priv,
1312                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1313                                     scd_flow, sta_id, tid, agg->txq_id);
1314                 spin_unlock_bh(&priv->sta_lock);
1315                 return;
1316         }
1317
1318         __skb_queue_head_init(&reclaimed_skbs);
1319
1320         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1321          * block-ack window (we assume that they've been successfully
1322          * transmitted ... if not, it's too late anyway). */
1323         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1324                           &reclaimed_skbs);
1325
1326         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1327                            "sta_id = %d\n",
1328                            agg->wait_for_ba,
1329                            (u8 *) &ba_resp->sta_addr_lo32,
1330                            ba_resp->sta_id);
1331         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1332                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1333                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1334                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1335                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1336                            ba_resp->txed_2_done);
1337
1338         /* Mark that the expected block-ack response arrived */
1339         agg->wait_for_ba = false;
1340
1341         /* Sanity check values reported by uCode */
1342         if (ba_resp->txed_2_done > ba_resp->txed) {
1343                 IWL_DEBUG_TX_REPLY(priv,
1344                         "bogus sent(%d) and ack(%d) count\n",
1345                         ba_resp->txed, ba_resp->txed_2_done);
1346                 /*
1347                  * set txed_2_done = txed,
1348                  * so it won't impact rate scale
1349                  */
1350                 ba_resp->txed = ba_resp->txed_2_done;
1351         }
1352
1353         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1354
1355         iwlagn_check_ratid_empty(priv, sta_id, tid);
1356         freed = 0;
1357
1358         skb_queue_walk(&reclaimed_skbs, skb) {
1359                 struct ieee80211_hdr *hdr = (void *)skb->data;
1360                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1361
1362                 if (ieee80211_is_data_qos(hdr->frame_control))
1363                         freed++;
1364                 else
1365                         WARN_ON_ONCE(1);
1366
1367                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1368
1369                 memset(&info->status, 0, sizeof(info->status));
1370                 /* Packet was transmitted successfully, failures come as single
1371                  * frames because before failing a frame the firmware transmits
1372                  * it without aggregation at least once.
1373                  */
1374                 info->flags |= IEEE80211_TX_STAT_ACK;
1375
1376                 if (freed == 1) {
1377                         /* this is the first skb we deliver in this batch */
1378                         /* put the rate scaling data there */
1379                         info = IEEE80211_SKB_CB(skb);
1380                         memset(&info->status, 0, sizeof(info->status));
1381                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1382                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1383                         info->status.ampdu_len = ba_resp->txed;
1384                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1385                                                     info);
1386                 }
1387         }
1388
1389         spin_unlock_bh(&priv->sta_lock);
1390
1391         while (!skb_queue_empty(&reclaimed_skbs)) {
1392                 skb = __skb_dequeue(&reclaimed_skbs);
1393                 ieee80211_tx_status(priv->hw, skb);
1394         }
1395 }