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

DEFINITIONS

1. iwlagn_tx_cmd_protection
2. iwlagn_tx_cmd_build_basic
3. iwlagn_tx_cmd_build_rate
4. iwlagn_tx_cmd_build_hwcrypto
5. iwl_sta_id_or_broadcast
6. iwlagn_tx_skb
7. iwlagn_alloc_agg_txq
8. iwlagn_dealloc_agg_txq
9. iwlagn_tx_agg_stop
10. iwlagn_tx_agg_start
11. iwlagn_tx_agg_flush
12. iwlagn_tx_agg_oper
13. iwlagn_check_ratid_empty
14. iwlagn_non_agg_tx_status
15. iwlagn_hwrate_to_tx_control
16. iwl_get_tx_fail_reason
17. iwlagn_count_agg_tx_err_status
18. iwlagn_get_scd_ssn
19. iwl_rx_reply_tx_agg
20. iwl_get_agg_tx_fail_reason
21. iwlagn_count_tx_err_status
22. iwlagn_set_tx_status
23. iwl_check_abort_status
24. iwlagn_rx_reply_tx
25. iwlagn_rx_reply_compressed_ba

   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_tx_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         dev_cmd->hdr.cmd = REPLY_TX;
 352         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 353 
 354         /* Total # bytes to be transmitted */
 355         len = (u16)skb->len;
 356         tx_cmd->len = cpu_to_le16(len);
 357 
 358         if (info->control.hw_key)
 359                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
 360 
 361         /* TODO need this for burst mode later on */
 362         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 363 
 364         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
 365 
 366         memset(&info->status, 0, sizeof(info->status));
 367         memset(info->driver_data, 0, sizeof(info->driver_data));
 368 
 369         info->driver_data[0] = ctx;
 370         info->driver_data[1] = dev_cmd;
 371         /* From now on, we cannot access info->control */
 372 
 373         spin_lock(&priv->sta_lock);
 374 
 375         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
 376                 u8 *qc = NULL;
 377                 struct iwl_tid_data *tid_data;
 378                 qc = ieee80211_get_qos_ctl(hdr);
 379                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 380                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 381                         goto drop_unlock_sta;
 382                 tid_data = &priv->tid_data[sta_id][tid];
 383 
 384                 /* aggregation is on for this <sta,tid> */
 385                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 386                     tid_data->agg.state != IWL_AGG_ON) {
 387                         IWL_ERR(priv,
 388                                 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
 389                                 info->flags, tid_data->agg.state);
 390                         IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
 391                                 sta_id, tid,
 392                                 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
 393                         goto drop_unlock_sta;
 394                 }
 395 
 396                 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
 397                  * only. Check this here.
 398                  */
 399                 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
 400                               tid_data->agg.state != IWL_AGG_OFF,
 401                               "Tx while agg.state = %d\n", tid_data->agg.state))
 402                         goto drop_unlock_sta;
 403 
 404                 seq_number = tid_data->seq_number;
 405                 seq_number &= IEEE80211_SCTL_SEQ;
 406                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 407                 hdr->seq_ctrl |= cpu_to_le16(seq_number);
 408                 seq_number += 0x10;
 409 
 410                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 411                         is_agg = true;
 412                 is_data_qos = true;
 413         }
 414 
 415         /* Copy MAC header from skb into command buffer */
 416         memcpy(tx_cmd->hdr, hdr, hdr_len);
 417 
 418         txq_id = info->hw_queue;
 419 
 420         if (is_agg)
 421                 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
 422         else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
 423                 /*
 424                  * The microcode will clear the more data
 425                  * bit in the last frame it transmits.
 426                  */
 427                 hdr->frame_control |=
 428                         cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 429         }
 430 
 431         WARN_ON_ONCE(is_agg &&
 432                      priv->queue_to_mac80211[txq_id] != info->hw_queue);
 433 
 434         IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
 435                      txq_id, seq_number);
 436 
 437         if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
 438                 goto drop_unlock_sta;
 439 
 440         if (is_data_qos && !ieee80211_has_morefrags(fc))
 441                 priv->tid_data[sta_id][tid].seq_number = seq_number;
 442 
 443         spin_unlock(&priv->sta_lock);
 444 
 445         /*
 446          * Avoid atomic ops if it isn't an associated client.
 447          * Also, if this is a packet for aggregation, don't
 448          * increase the counter because the ucode will stop
 449          * aggregation queues when their respective station
 450          * goes to sleep.
 451          */
 452         if (sta_priv && sta_priv->client && !is_agg)
 453                 atomic_inc(&sta_priv->pending_frames);
 454 
 455         return 0;
 456 
 457 drop_unlock_sta:
 458         if (dev_cmd)
 459                 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
 460         spin_unlock(&priv->sta_lock);
 461 drop_unlock_priv:
 462         return -1;
 463 }
 464 
 465 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
 466 {
 467         int q;
 468 
 469         for (q = IWLAGN_FIRST_AMPDU_QUEUE;
 470              q < priv->trans->trans_cfg->base_params->num_of_queues; q++) {
 471                 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
 472                         priv->queue_to_mac80211[q] = mq;
 473                         return q;
 474                 }
 475         }
 476 
 477         return -ENOSPC;
 478 }
 479 
 480 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
 481 {
 482         clear_bit(q, priv->agg_q_alloc);
 483         priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
 484 }
 485 
 486 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 487                         struct ieee80211_sta *sta, u16 tid)
 488 {
 489         struct iwl_tid_data *tid_data;
 490         int sta_id, txq_id;
 491         enum iwl_agg_state agg_state;
 492 
 493         sta_id = iwl_sta_id(sta);
 494 
 495         if (sta_id == IWL_INVALID_STATION) {
 496                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 497                 return -ENXIO;
 498         }
 499 
 500         spin_lock_bh(&priv->sta_lock);
 501 
 502         tid_data = &priv->tid_data[sta_id][tid];
 503         txq_id = tid_data->agg.txq_id;
 504 
 505         switch (tid_data->agg.state) {
 506         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 507                 /*
 508                 * This can happen if the peer stops aggregation
 509                 * again before we've had a chance to drain the
 510                 * queue we selected previously, i.e. before the
 511                 * session was really started completely.
 512                 */
 513                 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
 514                 goto turn_off;
 515         case IWL_AGG_STARTING:
 516                 /*
 517                  * This can happen when the session is stopped before
 518                  * we receive ADDBA response
 519                  */
 520                 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
 521                 goto turn_off;
 522         case IWL_AGG_ON:
 523                 break;
 524         default:
 525                 IWL_WARN(priv,
 526                          "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
 527                          sta_id, tid, tid_data->agg.state);
 528                 spin_unlock_bh(&priv->sta_lock);
 529                 return 0;
 530         }
 531 
 532         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 533 
 534         /* There are still packets for this RA / TID in the HW */
 535         if (!test_bit(txq_id, priv->agg_q_alloc)) {
 536                 IWL_DEBUG_TX_QUEUES(priv,
 537                         "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
 538                         sta_id, tid, txq_id);
 539         } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
 540                 IWL_DEBUG_TX_QUEUES(priv,
 541                                     "Can't proceed: ssn %d, next_recl = %d\n",
 542                                     tid_data->agg.ssn,
 543                                     tid_data->next_reclaimed);
 544                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
 545                 spin_unlock_bh(&priv->sta_lock);
 546                 return 0;
 547         }
 548 
 549         IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 550                             tid_data->agg.ssn);
 551 turn_off:
 552         agg_state = tid_data->agg.state;
 553         tid_data->agg.state = IWL_AGG_OFF;
 554 
 555         spin_unlock_bh(&priv->sta_lock);
 556 
 557         if (test_bit(txq_id, priv->agg_q_alloc)) {
 558                 /*
 559                  * If the transport didn't know that we wanted to start
 560                  * agreggation, don't tell it that we want to stop them.
 561                  * This can happen when we don't get the addBA response on
 562                  * time, or we hadn't time to drain the AC queues.
 563                  */
 564                 if (agg_state == IWL_AGG_ON)
 565                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 566                 else
 567                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 568                                             agg_state);
 569                 iwlagn_dealloc_agg_txq(priv, txq_id);
 570         }
 571 
 572         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 573 
 574         return 0;
 575 }
 576 
 577 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 578                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 579 {
 580         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 581         struct iwl_tid_data *tid_data;
 582         int sta_id, txq_id, ret;
 583 
 584         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 585                      sta->addr, tid);
 586 
 587         sta_id = iwl_sta_id(sta);
 588         if (sta_id == IWL_INVALID_STATION) {
 589                 IWL_ERR(priv, "Start AGG on invalid station\n");
 590                 return -ENXIO;
 591         }
 592         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 593                 return -EINVAL;
 594 
 595         if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 596                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 597                 return -ENXIO;
 598         }
 599 
 600         txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
 601         if (txq_id < 0) {
 602                 IWL_DEBUG_TX_QUEUES(priv,
 603                         "No free aggregation queue for %pM/%d\n",
 604                         sta->addr, tid);
 605                 return txq_id;
 606         }
 607 
 608         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 609         if (ret)
 610                 return ret;
 611 
 612         spin_lock_bh(&priv->sta_lock);
 613         tid_data = &priv->tid_data[sta_id][tid];
 614         tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 615         tid_data->agg.txq_id = txq_id;
 616 
 617         *ssn = tid_data->agg.ssn;
 618 
 619         if (*ssn == tid_data->next_reclaimed) {
 620                 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
 621                                     tid_data->agg.ssn);
 622                 tid_data->agg.state = IWL_AGG_STARTING;
 623                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 624         } else {
 625                 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
 626                                     "next_reclaimed = %d\n",
 627                                     tid_data->agg.ssn,
 628                                     tid_data->next_reclaimed);
 629                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 630         }
 631         spin_unlock_bh(&priv->sta_lock);
 632 
 633         return ret;
 634 }
 635 
 636 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
 637                         struct ieee80211_sta *sta, u16 tid)
 638 {
 639         struct iwl_tid_data *tid_data;
 640         enum iwl_agg_state agg_state;
 641         int sta_id, txq_id;
 642         sta_id = iwl_sta_id(sta);
 643 
 644         /*
 645          * First set the agg state to OFF to avoid calling
 646          * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
 647          */
 648         spin_lock_bh(&priv->sta_lock);
 649 
 650         tid_data = &priv->tid_data[sta_id][tid];
 651         txq_id = tid_data->agg.txq_id;
 652         agg_state = tid_data->agg.state;
 653         IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
 654                             sta_id, tid, txq_id, tid_data->agg.state);
 655 
 656         tid_data->agg.state = IWL_AGG_OFF;
 657 
 658         spin_unlock_bh(&priv->sta_lock);
 659 
 660         if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
 661                 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
 662 
 663         if (test_bit(txq_id, priv->agg_q_alloc)) {
 664                 /*
 665                  * If the transport didn't know that we wanted to start
 666                  * agreggation, don't tell it that we want to stop them.
 667                  * This can happen when we don't get the addBA response on
 668                  * time, or we hadn't time to drain the AC queues.
 669                  */
 670                 if (agg_state == IWL_AGG_ON)
 671                         iwl_trans_txq_disable(priv->trans, txq_id, true);
 672                 else
 673                         IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
 674                                             agg_state);
 675                 iwlagn_dealloc_agg_txq(priv, txq_id);
 676         }
 677 
 678         return 0;
 679 }
 680 
 681 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 682                         struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 683 {
 684         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 685         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 686         int q, fifo;
 687         u16 ssn;
 688 
 689         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 690 
 691         spin_lock_bh(&priv->sta_lock);
 692         ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
 693         q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
 694         priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
 695         spin_unlock_bh(&priv->sta_lock);
 696 
 697         fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
 698 
 699         iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
 700                              buf_size, ssn, 0);
 701 
 702         /*
 703          * If the limit is 0, then it wasn't initialised yet,
 704          * use the default. We can do that since we take the
 705          * minimum below, and we don't want to go above our
 706          * default due to hardware restrictions.
 707          */
 708         if (sta_priv->max_agg_bufsize == 0)
 709                 sta_priv->max_agg_bufsize =
 710                         LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 711 
 712         /*
 713          * Even though in theory the peer could have different
 714          * aggregation reorder buffer sizes for different sessions,
 715          * our ucode doesn't allow for that and has a global limit
 716          * for each station. Therefore, use the minimum of all the
 717          * aggregation sessions and our default value.
 718          */
 719         sta_priv->max_agg_bufsize =
 720                 min(sta_priv->max_agg_bufsize, buf_size);
 721 
 722         if (priv->hw_params.use_rts_for_aggregation) {
 723                 /*
 724                  * switch to RTS/CTS if it is the prefer protection
 725                  * method for HT traffic
 726                  */
 727 
 728                 sta_priv->lq_sta.lq.general_params.flags |=
 729                         LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 730         }
 731         priv->agg_tids_count++;
 732         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 733                      priv->agg_tids_count);
 734 
 735         sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 736                 sta_priv->max_agg_bufsize;
 737 
 738         IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 739                  sta->addr, tid);
 740 
 741         return iwl_send_lq_cmd(priv, ctx,
 742                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 743 }
 744 
 745 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
 746 {
 747         struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
 748         enum iwl_rxon_context_id ctx;
 749         struct ieee80211_vif *vif;
 750         u8 *addr;
 751 
 752         lockdep_assert_held(&priv->sta_lock);
 753 
 754         addr = priv->stations[sta_id].sta.sta.addr;
 755         ctx = priv->stations[sta_id].ctxid;
 756         vif = priv->contexts[ctx].vif;
 757 
 758         switch (priv->tid_data[sta_id][tid].agg.state) {
 759         case IWL_EMPTYING_HW_QUEUE_DELBA:
 760                 /* There are no packets for this RA / TID in the HW any more */
 761                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 762                         IWL_DEBUG_TX_QUEUES(priv,
 763                                 "Can continue DELBA flow ssn = next_recl = %d\n",
 764                                 tid_data->next_reclaimed);
 765                         iwl_trans_txq_disable(priv->trans,
 766                                               tid_data->agg.txq_id, true);
 767                         iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
 768                         tid_data->agg.state = IWL_AGG_OFF;
 769                         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
 770                 }
 771                 break;
 772         case IWL_EMPTYING_HW_QUEUE_ADDBA:
 773                 /* There are no packets for this RA / TID in the HW any more */
 774                 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
 775                         IWL_DEBUG_TX_QUEUES(priv,
 776                                 "Can continue ADDBA flow ssn = next_recl = %d\n",
 777                                 tid_data->next_reclaimed);
 778                         tid_data->agg.state = IWL_AGG_STARTING;
 779                         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
 780                 }
 781                 break;
 782         default:
 783                 break;
 784         }
 785 }
 786 
 787 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 788                                      struct iwl_rxon_context *ctx,
 789                                      const u8 *addr1)
 790 {
 791         struct ieee80211_sta *sta;
 792         struct iwl_station_priv *sta_priv;
 793 
 794         rcu_read_lock();
 795         sta = ieee80211_find_sta(ctx->vif, addr1);
 796         if (sta) {
 797                 sta_priv = (void *)sta->drv_priv;
 798                 /* avoid atomic ops if this isn't a client */
 799                 if (sta_priv->client &&
 800                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 801                         ieee80211_sta_block_awake(priv->hw, sta, false);
 802         }
 803         rcu_read_unlock();
 804 }
 805 
 806 /**
 807  * translate ucode response to mac80211 tx status control values
 808  */
 809 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 810                                   struct ieee80211_tx_info *info)
 811 {
 812         struct ieee80211_tx_rate *r = &info->status.rates[0];
 813 
 814         info->status.antenna =
 815                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 816         if (rate_n_flags & RATE_MCS_HT_MSK)
 817                 r->flags |= IEEE80211_TX_RC_MCS;
 818         if (rate_n_flags & RATE_MCS_GF_MSK)
 819                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 820         if (rate_n_flags & RATE_MCS_HT40_MSK)
 821                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 822         if (rate_n_flags & RATE_MCS_DUP_MSK)
 823                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 824         if (rate_n_flags & RATE_MCS_SGI_MSK)
 825                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 826         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 827 }
 828 
 829 #ifdef CONFIG_IWLWIFI_DEBUG
 830 const char *iwl_get_tx_fail_reason(u32 status)
 831 {
 832 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 833 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 834 
 835         switch (status & TX_STATUS_MSK) {
 836         case TX_STATUS_SUCCESS:
 837                 return "SUCCESS";
 838         TX_STATUS_POSTPONE(DELAY);
 839         TX_STATUS_POSTPONE(FEW_BYTES);
 840         TX_STATUS_POSTPONE(BT_PRIO);
 841         TX_STATUS_POSTPONE(QUIET_PERIOD);
 842         TX_STATUS_POSTPONE(CALC_TTAK);
 843         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 844         TX_STATUS_FAIL(SHORT_LIMIT);
 845         TX_STATUS_FAIL(LONG_LIMIT);
 846         TX_STATUS_FAIL(FIFO_UNDERRUN);
 847         TX_STATUS_FAIL(DRAIN_FLOW);
 848         TX_STATUS_FAIL(RFKILL_FLUSH);
 849         TX_STATUS_FAIL(LIFE_EXPIRE);
 850         TX_STATUS_FAIL(DEST_PS);
 851         TX_STATUS_FAIL(HOST_ABORTED);
 852         TX_STATUS_FAIL(BT_RETRY);
 853         TX_STATUS_FAIL(STA_INVALID);
 854         TX_STATUS_FAIL(FRAG_DROPPED);
 855         TX_STATUS_FAIL(TID_DISABLE);
 856         TX_STATUS_FAIL(FIFO_FLUSHED);
 857         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 858         TX_STATUS_FAIL(PASSIVE_NO_RX);
 859         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 860         }
 861 
 862         return "UNKNOWN";
 863 
 864 #undef TX_STATUS_FAIL
 865 #undef TX_STATUS_POSTPONE
 866 }
 867 #endif /* CONFIG_IWLWIFI_DEBUG */
 868 
 869 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 870 {
 871         status &= AGG_TX_STATUS_MSK;
 872 
 873         switch (status) {
 874         case AGG_TX_STATE_UNDERRUN_MSK:
 875                 priv->reply_agg_tx_stats.underrun++;
 876                 break;
 877         case AGG_TX_STATE_BT_PRIO_MSK:
 878                 priv->reply_agg_tx_stats.bt_prio++;
 879                 break;
 880         case AGG_TX_STATE_FEW_BYTES_MSK:
 881                 priv->reply_agg_tx_stats.few_bytes++;
 882                 break;
 883         case AGG_TX_STATE_ABORT_MSK:
 884                 priv->reply_agg_tx_stats.abort++;
 885                 break;
 886         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 887                 priv->reply_agg_tx_stats.last_sent_ttl++;
 888                 break;
 889         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 890                 priv->reply_agg_tx_stats.last_sent_try++;
 891                 break;
 892         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 893                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 894                 break;
 895         case AGG_TX_STATE_SCD_QUERY_MSK:
 896                 priv->reply_agg_tx_stats.scd_query++;
 897                 break;
 898         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 899                 priv->reply_agg_tx_stats.bad_crc32++;
 900                 break;
 901         case AGG_TX_STATE_RESPONSE_MSK:
 902                 priv->reply_agg_tx_stats.response++;
 903                 break;
 904         case AGG_TX_STATE_DUMP_TX_MSK:
 905                 priv->reply_agg_tx_stats.dump_tx++;
 906                 break;
 907         case AGG_TX_STATE_DELAY_TX_MSK:
 908                 priv->reply_agg_tx_stats.delay_tx++;
 909                 break;
 910         default:
 911                 priv->reply_agg_tx_stats.unknown++;
 912                 break;
 913         }
 914 }
 915 
 916 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 917 {
 918         return le32_to_cpup((__le32 *)&tx_resp->status +
 919                             tx_resp->frame_count) & IEEE80211_MAX_SN;
 920 }
 921 
 922 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 923                                 struct iwlagn_tx_resp *tx_resp)
 924 {
 925         struct agg_tx_status *frame_status = &tx_resp->status;
 926         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 927                 IWLAGN_TX_RES_TID_POS;
 928         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 929                 IWLAGN_TX_RES_RA_POS;
 930         struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
 931         u32 status = le16_to_cpu(tx_resp->status.status);
 932         int i;
 933 
 934         WARN_ON(tid == IWL_TID_NON_QOS);
 935 
 936         if (agg->wait_for_ba)
 937                 IWL_DEBUG_TX_REPLY(priv,
 938                         "got tx response w/o block-ack\n");
 939 
 940         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 941         agg->wait_for_ba = (tx_resp->frame_count > 1);
 942 
 943         /*
 944          * If the BT kill count is non-zero, we'll get this
 945          * notification again.
 946          */
 947         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 948             priv->lib->bt_params &&
 949             priv->lib->bt_params->advanced_bt_coexist) {
 950                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 951         }
 952 
 953         if (tx_resp->frame_count == 1)
 954                 return;
 955 
 956         IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
 957                            agg->txq_id,
 958                            le32_to_cpu(tx_resp->rate_n_flags),
 959                            iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
 960 
 961         /* Construct bit-map of pending frames within Tx window */
 962         for (i = 0; i < tx_resp->frame_count; i++) {
 963                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 964                 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
 965 
 966                 if (status & AGG_TX_STATUS_MSK)
 967                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 968 
 969                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 970                               AGG_TX_STATE_ABORT_MSK))
 971                         continue;
 972 
 973                 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
 974                         IWL_DEBUG_TX_REPLY(priv,
 975                                            "%d: status %s (0x%04x), try-count (0x%01x)\n",
 976                                            i,
 977                                            iwl_get_agg_tx_fail_reason(fstatus),
 978                                            fstatus & AGG_TX_STATUS_MSK,
 979                                            retry_cnt);
 980         }
 981 }
 982 
 983 #ifdef CONFIG_IWLWIFI_DEBUG
 984 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 985 
 986 const char *iwl_get_agg_tx_fail_reason(u16 status)
 987 {
 988         status &= AGG_TX_STATUS_MSK;
 989         switch (status) {
 990         case AGG_TX_STATE_TRANSMITTED:
 991                 return "SUCCESS";
 992                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 993                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 994                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 995                 AGG_TX_STATE_FAIL(ABORT_MSK);
 996                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 997                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 998                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 999                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1000                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1001                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1002                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1003                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1004         }
1005 
1006         return "UNKNOWN";
1007 }
1008 #endif /* CONFIG_IWLWIFI_DEBUG */
1009 
1010 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1011 {
1012         status &= TX_STATUS_MSK;
1013 
1014         switch (status) {
1015         case TX_STATUS_POSTPONE_DELAY:
1016                 priv->reply_tx_stats.pp_delay++;
1017                 break;
1018         case TX_STATUS_POSTPONE_FEW_BYTES:
1019                 priv->reply_tx_stats.pp_few_bytes++;
1020                 break;
1021         case TX_STATUS_POSTPONE_BT_PRIO:
1022                 priv->reply_tx_stats.pp_bt_prio++;
1023                 break;
1024         case TX_STATUS_POSTPONE_QUIET_PERIOD:
1025                 priv->reply_tx_stats.pp_quiet_period++;
1026                 break;
1027         case TX_STATUS_POSTPONE_CALC_TTAK:
1028                 priv->reply_tx_stats.pp_calc_ttak++;
1029                 break;
1030         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1031                 priv->reply_tx_stats.int_crossed_retry++;
1032                 break;
1033         case TX_STATUS_FAIL_SHORT_LIMIT:
1034                 priv->reply_tx_stats.short_limit++;
1035                 break;
1036         case TX_STATUS_FAIL_LONG_LIMIT:
1037                 priv->reply_tx_stats.long_limit++;
1038                 break;
1039         case TX_STATUS_FAIL_FIFO_UNDERRUN:
1040                 priv->reply_tx_stats.fifo_underrun++;
1041                 break;
1042         case TX_STATUS_FAIL_DRAIN_FLOW:
1043                 priv->reply_tx_stats.drain_flow++;
1044                 break;
1045         case TX_STATUS_FAIL_RFKILL_FLUSH:
1046                 priv->reply_tx_stats.rfkill_flush++;
1047                 break;
1048         case TX_STATUS_FAIL_LIFE_EXPIRE:
1049                 priv->reply_tx_stats.life_expire++;
1050                 break;
1051         case TX_STATUS_FAIL_DEST_PS:
1052                 priv->reply_tx_stats.dest_ps++;
1053                 break;
1054         case TX_STATUS_FAIL_HOST_ABORTED:
1055                 priv->reply_tx_stats.host_abort++;
1056                 break;
1057         case TX_STATUS_FAIL_BT_RETRY:
1058                 priv->reply_tx_stats.bt_retry++;
1059                 break;
1060         case TX_STATUS_FAIL_STA_INVALID:
1061                 priv->reply_tx_stats.sta_invalid++;
1062                 break;
1063         case TX_STATUS_FAIL_FRAG_DROPPED:
1064                 priv->reply_tx_stats.frag_drop++;
1065                 break;
1066         case TX_STATUS_FAIL_TID_DISABLE:
1067                 priv->reply_tx_stats.tid_disable++;
1068                 break;
1069         case TX_STATUS_FAIL_FIFO_FLUSHED:
1070                 priv->reply_tx_stats.fifo_flush++;
1071                 break;
1072         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1073                 priv->reply_tx_stats.insuff_cf_poll++;
1074                 break;
1075         case TX_STATUS_FAIL_PASSIVE_NO_RX:
1076                 priv->reply_tx_stats.fail_hw_drop++;
1077                 break;
1078         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1079                 priv->reply_tx_stats.sta_color_mismatch++;
1080                 break;
1081         default:
1082                 priv->reply_tx_stats.unknown++;
1083                 break;
1084         }
1085 }
1086 
1087 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1088                                  struct ieee80211_tx_info *info,
1089                                  struct iwlagn_tx_resp *tx_resp)
1090 {
1091         u16 status = le16_to_cpu(tx_resp->status.status);
1092 
1093         info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1094 
1095         info->status.rates[0].count = tx_resp->failure_frame + 1;
1096         info->flags |= iwl_tx_status_to_mac80211(status);
1097         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1098                                     info);
1099         if (!iwl_is_tx_success(status))
1100                 iwlagn_count_tx_err_status(priv, status);
1101 }
1102 
1103 static void iwl_check_abort_status(struct iwl_priv *priv,
1104                             u8 frame_count, u32 status)
1105 {
1106         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1107                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1108                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1109                         queue_work(priv->workqueue, &priv->tx_flush);
1110         }
1111 }
1112 
1113 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1114 {
1115         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1116         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1117         int txq_id = SEQ_TO_QUEUE(sequence);
1118         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1119         struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1120         struct ieee80211_hdr *hdr;
1121         u32 status = le16_to_cpu(tx_resp->status.status);
1122         u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1123         int tid;
1124         int sta_id;
1125         int freed;
1126         struct ieee80211_tx_info *info;
1127         struct sk_buff_head skbs;
1128         struct sk_buff *skb;
1129         struct iwl_rxon_context *ctx;
1130         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1131 
1132         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1133                 IWLAGN_TX_RES_TID_POS;
1134         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1135                 IWLAGN_TX_RES_RA_POS;
1136 
1137         spin_lock_bh(&priv->sta_lock);
1138 
1139         if (is_agg) {
1140                 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1141                              tid >= IWL_MAX_TID_COUNT);
1142                 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1143                         IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1144                                 priv->tid_data[sta_id][tid].agg.txq_id);
1145                 iwl_rx_reply_tx_agg(priv, tx_resp);
1146         }
1147 
1148         __skb_queue_head_init(&skbs);
1149 
1150         if (tx_resp->frame_count == 1) {
1151                 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1152                 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1153 
1154                 if (is_agg) {
1155                         /* If this is an aggregation queue, we can rely on the
1156                          * ssn since the wifi sequence number corresponds to
1157                          * the index in the TFD ring (%256).
1158                          * The seq_ctl is the sequence control of the packet
1159                          * to which this Tx response relates. But if there is a
1160                          * hole in the bitmap of the BA we received, this Tx
1161                          * response may allow to reclaim the hole and all the
1162                          * subsequent packets that were already acked.
1163                          * In that case, seq_ctl != ssn, and the next packet
1164                          * to be reclaimed will be ssn and not seq_ctl.
1165                          */
1166                         next_reclaimed = ssn;
1167                 }
1168 
1169                 if (tid != IWL_TID_NON_QOS) {
1170                         priv->tid_data[sta_id][tid].next_reclaimed =
1171                                 next_reclaimed;
1172                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1173                                                   next_reclaimed);
1174                         iwlagn_check_ratid_empty(priv, sta_id, tid);
1175                 }
1176 
1177                 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1178 
1179                 freed = 0;
1180 
1181                 /* process frames */
1182                 skb_queue_walk(&skbs, skb) {
1183                         hdr = (struct ieee80211_hdr *)skb->data;
1184 
1185                         if (!ieee80211_is_data_qos(hdr->frame_control))
1186                                 priv->last_seq_ctl = tx_resp->seq_ctl;
1187 
1188                         info = IEEE80211_SKB_CB(skb);
1189                         ctx = info->driver_data[0];
1190                         iwl_trans_free_tx_cmd(priv->trans,
1191                                               info->driver_data[1]);
1192 
1193                         memset(&info->status, 0, sizeof(info->status));
1194 
1195                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1196                             ctx->vif &&
1197                             ctx->vif->type == NL80211_IFTYPE_STATION) {
1198                                 /* block and stop all queues */
1199                                 priv->passive_no_rx = true;
1200                                 IWL_DEBUG_TX_QUEUES(priv,
1201                                         "stop all queues: passive channel\n");
1202                                 ieee80211_stop_queues(priv->hw);
1203 
1204                                 IWL_DEBUG_TX_REPLY(priv,
1205                                            "TXQ %d status %s (0x%08x) "
1206                                            "rate_n_flags 0x%x retries %d\n",
1207                                            txq_id,
1208                                            iwl_get_tx_fail_reason(status),
1209                                            status,
1210                                            le32_to_cpu(tx_resp->rate_n_flags),
1211                                            tx_resp->failure_frame);
1212 
1213                                 IWL_DEBUG_TX_REPLY(priv,
1214                                            "FrameCnt = %d, idx=%d\n",
1215                                            tx_resp->frame_count, cmd_index);
1216                         }
1217 
1218                         /* check if BAR is needed */
1219                         if (is_agg && !iwl_is_tx_success(status))
1220                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1221                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1222                                      tx_resp);
1223                         if (!is_agg)
1224                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1225 
1226                         freed++;
1227                 }
1228 
1229                 if (tid != IWL_TID_NON_QOS) {
1230                         priv->tid_data[sta_id][tid].next_reclaimed =
1231                                 next_reclaimed;
1232                         IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1233                                            next_reclaimed);
1234                 }
1235 
1236                 if (!is_agg && freed != 1)
1237                         IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1238 
1239                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1240                                    iwl_get_tx_fail_reason(status), status);
1241 
1242                 IWL_DEBUG_TX_REPLY(priv,
1243                                    "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1244                                    le32_to_cpu(tx_resp->rate_n_flags),
1245                                    tx_resp->failure_frame,
1246                                    SEQ_TO_INDEX(sequence), ssn,
1247                                    le16_to_cpu(tx_resp->seq_ctl));
1248         }
1249 
1250         iwl_check_abort_status(priv, tx_resp->frame_count, status);
1251         spin_unlock_bh(&priv->sta_lock);
1252 
1253         while (!skb_queue_empty(&skbs)) {
1254                 skb = __skb_dequeue(&skbs);
1255                 ieee80211_tx_status(priv->hw, skb);
1256         }
1257 }
1258 
1259 /**
1260  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1261  *
1262  * Handles block-acknowledge notification from device, which reports success
1263  * of frames sent via aggregation.
1264  */
1265 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1266                                    struct iwl_rx_cmd_buffer *rxb)
1267 {
1268         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1269         struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1270         struct iwl_ht_agg *agg;
1271         struct sk_buff_head reclaimed_skbs;
1272         struct sk_buff *skb;
1273         int sta_id;
1274         int tid;
1275         int freed;
1276 
1277         /* "flow" corresponds to Tx queue */
1278         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1279 
1280         /* "ssn" is start of block-ack Tx window, corresponds to index
1281          * (in Tx queue's circular buffer) of first TFD/frame in window */
1282         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1283 
1284         if (scd_flow >= priv->trans->trans_cfg->base_params->num_of_queues) {
1285                 IWL_ERR(priv,
1286                         "BUG_ON scd_flow is bigger than number of queues\n");
1287                 return;
1288         }
1289 
1290         sta_id = ba_resp->sta_id;
1291         tid = ba_resp->tid;
1292         agg = &priv->tid_data[sta_id][tid].agg;
1293 
1294         spin_lock_bh(&priv->sta_lock);
1295 
1296         if (unlikely(!agg->wait_for_ba)) {
1297                 if (unlikely(ba_resp->bitmap))
1298                         IWL_ERR(priv, "Received BA when not expected\n");
1299                 spin_unlock_bh(&priv->sta_lock);
1300                 return;
1301         }
1302 
1303         if (unlikely(scd_flow != agg->txq_id)) {
1304                 /*
1305                  * FIXME: this is a uCode bug which need to be addressed,
1306                  * log the information and return for now.
1307                  * Since it is can possibly happen very often and in order
1308                  * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1309                  */
1310                 IWL_DEBUG_TX_QUEUES(priv,
1311                                     "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1312                                     scd_flow, sta_id, tid, agg->txq_id);
1313                 spin_unlock_bh(&priv->sta_lock);
1314                 return;
1315         }
1316 
1317         __skb_queue_head_init(&reclaimed_skbs);
1318 
1319         /* Release all TFDs before the SSN, i.e. all TFDs in front of
1320          * block-ack window (we assume that they've been successfully
1321          * transmitted ... if not, it's too late anyway). */
1322         iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1323                           &reclaimed_skbs);
1324 
1325         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1326                            "sta_id = %d\n",
1327                            agg->wait_for_ba,
1328                            (u8 *) &ba_resp->sta_addr_lo32,
1329                            ba_resp->sta_id);
1330         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1331                            "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1332                            ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1333                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1334                            scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1335                            ba_resp->txed_2_done);
1336 
1337         /* Mark that the expected block-ack response arrived */
1338         agg->wait_for_ba = false;
1339 
1340         /* Sanity check values reported by uCode */
1341         if (ba_resp->txed_2_done > ba_resp->txed) {
1342                 IWL_DEBUG_TX_REPLY(priv,
1343                         "bogus sent(%d) and ack(%d) count\n",
1344                         ba_resp->txed, ba_resp->txed_2_done);
1345                 /*
1346                  * set txed_2_done = txed,
1347                  * so it won't impact rate scale
1348                  */
1349                 ba_resp->txed = ba_resp->txed_2_done;
1350         }
1351 
1352         priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1353 
1354         iwlagn_check_ratid_empty(priv, sta_id, tid);
1355         freed = 0;
1356 
1357         skb_queue_walk(&reclaimed_skbs, skb) {
1358                 struct ieee80211_hdr *hdr = (void *)skb->data;
1359                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1360 
1361                 if (ieee80211_is_data_qos(hdr->frame_control))
1362                         freed++;
1363                 else
1364                         WARN_ON_ONCE(1);
1365 
1366                 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1367 
1368                 memset(&info->status, 0, sizeof(info->status));
1369                 /* Packet was transmitted successfully, failures come as single
1370                  * frames because before failing a frame the firmware transmits
1371                  * it without aggregation at least once.
1372                  */
1373                 info->flags |= IEEE80211_TX_STAT_ACK;
1374 
1375                 if (freed == 1) {
1376                         /* this is the first skb we deliver in this batch */
1377                         /* put the rate scaling data there */
1378                         info = IEEE80211_SKB_CB(skb);
1379                         memset(&info->status, 0, sizeof(info->status));
1380                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1381                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
1382                         info->status.ampdu_len = ba_resp->txed;
1383                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1384                                                     info);
1385                 }
1386         }
1387 
1388         spin_unlock_bh(&priv->sta_lock);
1389 
1390         while (!skb_queue_empty(&reclaimed_skbs)) {
1391                 skb = __skb_dequeue(&reclaimed_skbs);
1392                 ieee80211_tx_status(priv->hw, skb);
1393         }
1394 }