drivers/net/wireless/iwlwifi/iwl-agn-tx.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/sched.h>
  34 #include <linux/ieee80211.h>
  35
  36 #include "iwl-dev.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-agn-hw.h"
  40 #include "iwl-agn.h"
  41 #include "iwl-trans.h"
  42
  43 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
  44                                      struct ieee80211_tx_info *info,
  45                                      __le16 fc, __le32 *tx_flags)
  46 {
  47         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
  48             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
  49             info->flags & IEEE80211_TX_CTL_AMPDU)
  50                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
  51 }
  52
  53 /*
  54  * handle build REPLY_TX command notification.
  55  */
  56 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
  57                                       struct sk_buff *skb,
  58                                       struct iwl_tx_cmd *tx_cmd,
  59                                       struct ieee80211_tx_info *info,
  60                                       struct ieee80211_hdr *hdr, u8 sta_id)
  61 {
  62         __le16 fc = hdr->frame_control;
  63         __le32 tx_flags = tx_cmd->tx_flags;
  64
  65         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
  66
  67         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  68                 tx_flags |= TX_CMD_FLG_ACK_MSK;
  69         else
  70                 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
  71
  72         if (ieee80211_is_probe_resp(fc))
  73                 tx_flags |= TX_CMD_FLG_TSF_MSK;
  74         else if (ieee80211_is_back_req(fc))
  75                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
  76         else if (info->band == IEEE80211_BAND_2GHZ &&
  77                  priv->cfg->bt_params &&
  78                  priv->cfg->bt_params->advanced_bt_coexist &&
  79                  (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
  80                  ieee80211_is_reassoc_req(fc) ||
  81                  skb->protocol == cpu_to_be16(ETH_P_PAE)))
  82                 tx_flags |= TX_CMD_FLG_IGNORE_BT;
  83
  84
  85         tx_cmd->sta_id = sta_id;
  86         if (ieee80211_has_morefrags(fc))
  87                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
  88
  89         if (ieee80211_is_data_qos(fc)) {
  90                 u8 *qc = ieee80211_get_qos_ctl(hdr);
  91                 tx_cmd->tid_tspec = qc[0] & 0xf;
  92                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  93         } else {
  94                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
  95         }
  96
  97         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
  98
  99         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 100         if (ieee80211_is_mgmt(fc)) {
 101                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 102                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 103                 else
 104                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 105         } else {
 106                 tx_cmd->timeout.pm_frame_timeout = 0;
 107         }
 108
 109         tx_cmd->driver_txop = 0;
 110         tx_cmd->tx_flags = tx_flags;
 111         tx_cmd->next_frame_len = 0;
 112 }
 113
 114 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 115                                      struct iwl_tx_cmd *tx_cmd,
 116                                      struct ieee80211_tx_info *info,
 117                                      __le16 fc)
 118 {
 119         u32 rate_flags;
 120         int rate_idx;
 121         u8 rts_retry_limit;
 122         u8 data_retry_limit;
 123         u8 rate_plcp;
 124
 125         if (priv->shrd->wowlan) {
 126                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 127                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 128         } else {
 129                 /* Set retry limit on RTS packets */
 130                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 131
 132                 /* Set retry limit on DATA packets and Probe Responses*/
 133                 if (ieee80211_is_probe_resp(fc)) {
 134                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 135                         rts_retry_limit =
 136                                 min(data_retry_limit, rts_retry_limit);
 137                 } else if (ieee80211_is_back_req(fc))
 138                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 139                 else
 140                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 141         }
 142
 143         tx_cmd->data_retry_limit = data_retry_limit;
 144         tx_cmd->rts_retry_limit = rts_retry_limit;
 145
 146         /* DATA packets will use the uCode station table for rate/antenna
 147          * selection */
 148         if (ieee80211_is_data(fc)) {
 149                 tx_cmd->initial_rate_index = 0;
 150                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 151 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
 152                 if (priv->tm_fixed_rate) {
 153                         /*
 154                          * rate overwrite by testmode
 155                          * we not only send lq command to change rate
 156                          * we also re-enforce per data pkt base.
 157                          */
 158                         tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
 159                         memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
 160                                sizeof(tx_cmd->rate_n_flags));
 161                 }
 162 #endif
 163                 return;
 164         }
 165
 166         /**
 167          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 168          * not really a TX rate.  Thus, we use the lowest supported rate for
 169          * this band.  Also use the lowest supported rate if the stored rate
 170          * index is invalid.
 171          */
 172         rate_idx = info->control.rates[0].idx;
 173         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 174                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 175                 rate_idx = rate_lowest_index(&priv->bands[info->band],
 176                                 info->control.sta);
 177         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 178         if (info->band == IEEE80211_BAND_5GHZ)
 179                 rate_idx += IWL_FIRST_OFDM_RATE;
 180         /* Get PLCP rate for tx_cmd->rate_n_flags */
 181         rate_plcp = iwl_rates[rate_idx].plcp;
 182         /* Zero out flags for this packet */
 183         rate_flags = 0;
 184
 185         /* Set CCK flag as needed */
 186         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 187                 rate_flags |= RATE_MCS_CCK_MSK;
 188
 189         /* Set up antennas */
 190          if (priv->cfg->bt_params &&
 191              priv->cfg->bt_params->advanced_bt_coexist &&
 192              priv->bt_full_concurrent) {
 193                 /* operated as 1x1 in full concurrency mode */
 194                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 195                                 first_antenna(hw_params(priv).valid_tx_ant));
 196         } else
 197                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 198                                                 hw_params(priv).valid_tx_ant);
 199         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 200
 201         /* Set the rate in the TX cmd */
 202         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 203 }
 204
 205 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 206                                       struct ieee80211_tx_info *info,
 207                                       struct iwl_tx_cmd *tx_cmd,
 208                                       struct sk_buff *skb_frag,
 209                                       int sta_id)
 210 {
 211         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 212
 213         switch (keyconf->cipher) {
 214         case WLAN_CIPHER_SUITE_CCMP:
 215                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 216                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 217                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 218                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 219                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 220                 break;
 221
 222         case WLAN_CIPHER_SUITE_TKIP:
 223                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 224                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 225                 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
 226                 break;
 227
 228         case WLAN_CIPHER_SUITE_WEP104:
 229                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 230                 /* fall through */
 231         case WLAN_CIPHER_SUITE_WEP40:
 232                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 233                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 234
 235                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 236
 237                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 238                              "with key %d\n", keyconf->keyidx);
 239                 break;
 240
 241         default:
 242                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 243                 break;
 244         }
 245 }
 246
 247 /*
 248  * start REPLY_TX command process
 249  */
 250 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 251 {
 252         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 253         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 254         struct iwl_station_priv *sta_priv = NULL;
 255         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 256         struct iwl_device_cmd *dev_cmd = NULL;
 257         struct iwl_tx_cmd *tx_cmd;
 258
 259         __le16 fc;
 260         u8 hdr_len;
 261         u16 len;
 262         u8 sta_id;
 263         unsigned long flags;
 264         bool is_agg = false;
 265
 266         if (info->control.vif)
 267                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 268
 269         spin_lock_irqsave(&priv->shrd->lock, flags);
 270         if (iwl_is_rfkill(priv->shrd)) {
 271                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 272                 goto drop_unlock_priv;
 273         }
 274
 275         fc = hdr->frame_control;
 276
 277 #ifdef CONFIG_IWLWIFI_DEBUG
 278         if (ieee80211_is_auth(fc))
 279                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 280         else if (ieee80211_is_assoc_req(fc))
 281                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 282         else if (ieee80211_is_reassoc_req(fc))
 283                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 284 #endif
 285
 286         hdr_len = ieee80211_hdrlen(fc);
 287
 288         /* For management frames use broadcast id to do not break aggregation */
 289         if (!ieee80211_is_data(fc))
 290                 sta_id = ctx->bcast_sta_id;
 291         else {
 292                 /* Find index into station table for destination station */
 293                 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
 294                 if (sta_id == IWL_INVALID_STATION) {
 295                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 296                                        hdr->addr1);
 297                         goto drop_unlock_priv;
 298                 }
 299         }
 300
 301         IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
 302
 303         if (info->control.sta)
 304                 sta_priv = (void *)info->control.sta->drv_priv;
 305
 306         if (sta_priv && sta_priv->asleep &&
 307             (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
 308                 /*
 309                  * This sends an asynchronous command to the device,
 310                  * but we can rely on it being processed before the
 311                  * next frame is processed -- and the next frame to
 312                  * this station is the one that will consume this
 313                  * counter.
 314                  * For now set the counter to just 1 since we do not
 315                  * support uAPSD yet.
 316                  */
 317                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 318         }
 319
 320         if (info->flags & IEEE80211_TX_CTL_AMPDU)
 321                 is_agg = true;
 322
 323         /* irqs already disabled/saved above when locking priv->shrd->lock */
 324         spin_lock(&priv->shrd->sta_lock);
 325
 326         dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
 327
 328         if (unlikely(!dev_cmd))
 329                 goto drop_unlock_sta;
 330
 331         memset(dev_cmd, 0, sizeof(*dev_cmd));
 332         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 333
 334         /* Total # bytes to be transmitted */
 335         len = (u16)skb->len;
 336         tx_cmd->len = cpu_to_le16(len);
 337
 338         if (info->control.hw_key)
 339                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
 340
 341         /* TODO need this for burst mode later on */
 342         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 343         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 344
 345         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
 346
 347         iwl_update_stats(priv, true, fc, len);
 348
 349         memset(&info->status, 0, sizeof(info->status));
 350
 351         info->driver_data[0] = ctx;
 352         info->driver_data[1] = dev_cmd;
 353
 354         if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
 355                 goto drop_unlock_sta;
 356
 357         spin_unlock(&priv->shrd->sta_lock);
 358         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 359
 360         /*
 361          * Avoid atomic ops if it isn't an associated client.
 362          * Also, if this is a packet for aggregation, don't
 363          * increase the counter because the ucode will stop
 364          * aggregation queues when their respective station
 365          * goes to sleep.
 366          */
 367         if (sta_priv && sta_priv->client && !is_agg)
 368                 atomic_inc(&sta_priv->pending_frames);
 369
 370         return 0;
 371
 372 drop_unlock_sta:
 373         if (dev_cmd)
 374                 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
 375         spin_unlock(&priv->shrd->sta_lock);
 376 drop_unlock_priv:
 377         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 378         return -1;
 379 }
 380
 381 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 382                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 383 {
 384         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 385         int sta_id;
 386         int ret;
 387
 388         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 389                      sta->addr, tid);
 390
 391         sta_id = iwl_sta_id(sta);
 392         if (sta_id == IWL_INVALID_STATION) {
 393                 IWL_ERR(priv, "Start AGG on invalid station\n");
 394                 return -ENXIO;
 395         }
 396         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 397                 return -EINVAL;
 398
 399         if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 400                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 401                 return -ENXIO;
 402         }
 403
 404         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 405         if (ret)
 406                 return ret;
 407
 408         ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
 409                                      tid, ssn);
 410
 411         return ret;
 412 }
 413
 414 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 415                        struct ieee80211_sta *sta, u16 tid)
 416 {
 417         int sta_id;
 418         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 419
 420         sta_id = iwl_sta_id(sta);
 421
 422         if (sta_id == IWL_INVALID_STATION) {
 423                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 424                 return -ENXIO;
 425         }
 426
 427         return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
 428                                         sta_id, tid);
 429 }
 430
 431 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 432                                      struct iwl_rxon_context *ctx,
 433                                      const u8 *addr1)
 434 {
 435         struct ieee80211_sta *sta;
 436         struct iwl_station_priv *sta_priv;
 437
 438         rcu_read_lock();
 439         sta = ieee80211_find_sta(ctx->vif, addr1);
 440         if (sta) {
 441                 sta_priv = (void *)sta->drv_priv;
 442                 /* avoid atomic ops if this isn't a client */
 443                 if (sta_priv->client &&
 444                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 445                         ieee80211_sta_block_awake(priv->hw, sta, false);
 446         }
 447         rcu_read_unlock();
 448 }
 449
 450 /**
 451  * translate ucode response to mac80211 tx status control values
 452  */
 453 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 454                                   struct ieee80211_tx_info *info)
 455 {
 456         struct ieee80211_tx_rate *r = &info->control.rates[0];
 457
 458         info->antenna_sel_tx =
 459                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 460         if (rate_n_flags & RATE_MCS_HT_MSK)
 461                 r->flags |= IEEE80211_TX_RC_MCS;
 462         if (rate_n_flags & RATE_MCS_GF_MSK)
 463                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 464         if (rate_n_flags & RATE_MCS_HT40_MSK)
 465                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 466         if (rate_n_flags & RATE_MCS_DUP_MSK)
 467                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 468         if (rate_n_flags & RATE_MCS_SGI_MSK)
 469                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 470         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 471 }
 472
 473 #ifdef CONFIG_IWLWIFI_DEBUG
 474 const char *iwl_get_tx_fail_reason(u32 status)
 475 {
 476 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 477 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 478
 479         switch (status & TX_STATUS_MSK) {
 480         case TX_STATUS_SUCCESS:
 481                 return "SUCCESS";
 482         TX_STATUS_POSTPONE(DELAY);
 483         TX_STATUS_POSTPONE(FEW_BYTES);
 484         TX_STATUS_POSTPONE(BT_PRIO);
 485         TX_STATUS_POSTPONE(QUIET_PERIOD);
 486         TX_STATUS_POSTPONE(CALC_TTAK);
 487         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 488         TX_STATUS_FAIL(SHORT_LIMIT);
 489         TX_STATUS_FAIL(LONG_LIMIT);
 490         TX_STATUS_FAIL(FIFO_UNDERRUN);
 491         TX_STATUS_FAIL(DRAIN_FLOW);
 492         TX_STATUS_FAIL(RFKILL_FLUSH);
 493         TX_STATUS_FAIL(LIFE_EXPIRE);
 494         TX_STATUS_FAIL(DEST_PS);
 495         TX_STATUS_FAIL(HOST_ABORTED);
 496         TX_STATUS_FAIL(BT_RETRY);
 497         TX_STATUS_FAIL(STA_INVALID);
 498         TX_STATUS_FAIL(FRAG_DROPPED);
 499         TX_STATUS_FAIL(TID_DISABLE);
 500         TX_STATUS_FAIL(FIFO_FLUSHED);
 501         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 502         TX_STATUS_FAIL(PASSIVE_NO_RX);
 503         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 504         }
 505
 506         return "UNKNOWN";
 507
 508 #undef TX_STATUS_FAIL
 509 #undef TX_STATUS_POSTPONE
 510 }
 511 #endif /* CONFIG_IWLWIFI_DEBUG */
 512
 513 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 514 {
 515         status &= AGG_TX_STATUS_MSK;
 516
 517         switch (status) {
 518         case AGG_TX_STATE_UNDERRUN_MSK:
 519                 priv->reply_agg_tx_stats.underrun++;
 520                 break;
 521         case AGG_TX_STATE_BT_PRIO_MSK:
 522                 priv->reply_agg_tx_stats.bt_prio++;
 523                 break;
 524         case AGG_TX_STATE_FEW_BYTES_MSK:
 525                 priv->reply_agg_tx_stats.few_bytes++;
 526                 break;
 527         case AGG_TX_STATE_ABORT_MSK:
 528                 priv->reply_agg_tx_stats.abort++;
 529                 break;
 530         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 531                 priv->reply_agg_tx_stats.last_sent_ttl++;
 532                 break;
 533         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 534                 priv->reply_agg_tx_stats.last_sent_try++;
 535                 break;
 536         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 537                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 538                 break;
 539         case AGG_TX_STATE_SCD_QUERY_MSK:
 540                 priv->reply_agg_tx_stats.scd_query++;
 541                 break;
 542         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 543                 priv->reply_agg_tx_stats.bad_crc32++;
 544                 break;
 545         case AGG_TX_STATE_RESPONSE_MSK:
 546                 priv->reply_agg_tx_stats.response++;
 547                 break;
 548         case AGG_TX_STATE_DUMP_TX_MSK:
 549                 priv->reply_agg_tx_stats.dump_tx++;
 550                 break;
 551         case AGG_TX_STATE_DELAY_TX_MSK:
 552                 priv->reply_agg_tx_stats.delay_tx++;
 553                 break;
 554         default:
 555                 priv->reply_agg_tx_stats.unknown++;
 556                 break;
 557         }
 558 }
 559
 560 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 561                                 struct iwlagn_tx_resp *tx_resp)
 562 {
 563         struct agg_tx_status *frame_status = &tx_resp->status;
 564         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 565                 IWLAGN_TX_RES_TID_POS;
 566         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 567                 IWLAGN_TX_RES_RA_POS;
 568         struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
 569         u32 status = le16_to_cpu(tx_resp->status.status);
 570         int i;
 571
 572         if (agg->wait_for_ba)
 573                 IWL_DEBUG_TX_REPLY(priv,
 574                         "got tx response w/o block-ack\n");
 575
 576         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 577         agg->wait_for_ba = (tx_resp->frame_count > 1);
 578
 579         /*
 580          * If the BT kill count is non-zero, we'll get this
 581          * notification again.
 582          */
 583         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 584             priv->cfg->bt_params &&
 585             priv->cfg->bt_params->advanced_bt_coexist) {
 586                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 587         }
 588
 589         if (tx_resp->frame_count == 1)
 590                 return;
 591
 592         /* Construct bit-map of pending frames within Tx window */
 593         for (i = 0; i < tx_resp->frame_count; i++) {
 594                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 595
 596                 if (status & AGG_TX_STATUS_MSK)
 597                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 598
 599                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 600                               AGG_TX_STATE_ABORT_MSK))
 601                         continue;
 602
 603                 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
 604                                    "try-count (0x%08x)\n",
 605                                    iwl_get_agg_tx_fail_reason(fstatus),
 606                                    fstatus & AGG_TX_STATUS_MSK,
 607                                    fstatus & AGG_TX_TRY_MSK);
 608         }
 609 }
 610
 611 #ifdef CONFIG_IWLWIFI_DEBUG
 612 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 613
 614 const char *iwl_get_agg_tx_fail_reason(u16 status)
 615 {
 616         status &= AGG_TX_STATUS_MSK;
 617         switch (status) {
 618         case AGG_TX_STATE_TRANSMITTED:
 619                 return "SUCCESS";
 620                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 621                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 622                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 623                 AGG_TX_STATE_FAIL(ABORT_MSK);
 624                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 625                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 626                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 627                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 628                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 629                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 630                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 631                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
 632         }
 633
 634         return "UNKNOWN";
 635 }
 636 #endif /* CONFIG_IWLWIFI_DEBUG */
 637
 638 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 639 {
 640         return le32_to_cpup((__le32 *)&tx_resp->status +
 641                             tx_resp->frame_count) & MAX_SN;
 642 }
 643
 644 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
 645 {
 646         status &= TX_STATUS_MSK;
 647
 648         switch (status) {
 649         case TX_STATUS_POSTPONE_DELAY:
 650                 priv->reply_tx_stats.pp_delay++;
 651                 break;
 652         case TX_STATUS_POSTPONE_FEW_BYTES:
 653                 priv->reply_tx_stats.pp_few_bytes++;
 654                 break;
 655         case TX_STATUS_POSTPONE_BT_PRIO:
 656                 priv->reply_tx_stats.pp_bt_prio++;
 657                 break;
 658         case TX_STATUS_POSTPONE_QUIET_PERIOD:
 659                 priv->reply_tx_stats.pp_quiet_period++;
 660                 break;
 661         case TX_STATUS_POSTPONE_CALC_TTAK:
 662                 priv->reply_tx_stats.pp_calc_ttak++;
 663                 break;
 664         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
 665                 priv->reply_tx_stats.int_crossed_retry++;
 666                 break;
 667         case TX_STATUS_FAIL_SHORT_LIMIT:
 668                 priv->reply_tx_stats.short_limit++;
 669                 break;
 670         case TX_STATUS_FAIL_LONG_LIMIT:
 671                 priv->reply_tx_stats.long_limit++;
 672                 break;
 673         case TX_STATUS_FAIL_FIFO_UNDERRUN:
 674                 priv->reply_tx_stats.fifo_underrun++;
 675                 break;
 676         case TX_STATUS_FAIL_DRAIN_FLOW:
 677                 priv->reply_tx_stats.drain_flow++;
 678                 break;
 679         case TX_STATUS_FAIL_RFKILL_FLUSH:
 680                 priv->reply_tx_stats.rfkill_flush++;
 681                 break;
 682         case TX_STATUS_FAIL_LIFE_EXPIRE:
 683                 priv->reply_tx_stats.life_expire++;
 684                 break;
 685         case TX_STATUS_FAIL_DEST_PS:
 686                 priv->reply_tx_stats.dest_ps++;
 687                 break;
 688         case TX_STATUS_FAIL_HOST_ABORTED:
 689                 priv->reply_tx_stats.host_abort++;
 690                 break;
 691         case TX_STATUS_FAIL_BT_RETRY:
 692                 priv->reply_tx_stats.bt_retry++;
 693                 break;
 694         case TX_STATUS_FAIL_STA_INVALID:
 695                 priv->reply_tx_stats.sta_invalid++;
 696                 break;
 697         case TX_STATUS_FAIL_FRAG_DROPPED:
 698                 priv->reply_tx_stats.frag_drop++;
 699                 break;
 700         case TX_STATUS_FAIL_TID_DISABLE:
 701                 priv->reply_tx_stats.tid_disable++;
 702                 break;
 703         case TX_STATUS_FAIL_FIFO_FLUSHED:
 704                 priv->reply_tx_stats.fifo_flush++;
 705                 break;
 706         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
 707                 priv->reply_tx_stats.insuff_cf_poll++;
 708                 break;
 709         case TX_STATUS_FAIL_PASSIVE_NO_RX:
 710                 priv->reply_tx_stats.fail_hw_drop++;
 711                 break;
 712         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
 713                 priv->reply_tx_stats.sta_color_mismatch++;
 714                 break;
 715         default:
 716                 priv->reply_tx_stats.unknown++;
 717                 break;
 718         }
 719 }
 720
 721 static void iwlagn_set_tx_status(struct iwl_priv *priv,
 722                                  struct ieee80211_tx_info *info,
 723                                  struct iwlagn_tx_resp *tx_resp,
 724                                  bool is_agg)
 725 {
 726         u16  status = le16_to_cpu(tx_resp->status.status);
 727
 728         info->status.rates[0].count = tx_resp->failure_frame + 1;
 729         if (is_agg)
 730                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 731         info->flags |= iwl_tx_status_to_mac80211(status);
 732         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
 733                                     info);
 734         if (!iwl_is_tx_success(status))
 735                 iwlagn_count_tx_err_status(priv, status);
 736 }
 737
 738 static void iwl_check_abort_status(struct iwl_priv *priv,
 739                             u8 frame_count, u32 status)
 740 {
 741         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
 742                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
 743                 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 744                         queue_work(priv->shrd->workqueue, &priv->tx_flush);
 745         }
 746 }
 747
 748 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 749                                struct iwl_device_cmd *cmd)
 750 {
 751         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 752         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 753         int txq_id = SEQ_TO_QUEUE(sequence);
 754         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
 755         struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 756         struct ieee80211_hdr *hdr;
 757         u32 status = le16_to_cpu(tx_resp->status.status);
 758         u32 ssn = iwlagn_get_scd_ssn(tx_resp);
 759         int tid;
 760         int sta_id;
 761         int freed;
 762         struct ieee80211_tx_info *info;
 763         unsigned long flags;
 764         struct sk_buff_head skbs;
 765         struct sk_buff *skb;
 766         struct iwl_rxon_context *ctx;
 767         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
 768
 769         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 770                 IWLAGN_TX_RES_TID_POS;
 771         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 772                 IWLAGN_TX_RES_RA_POS;
 773
 774         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 775
 776         if (is_agg)
 777                 iwl_rx_reply_tx_agg(priv, tx_resp);
 778
 779         if (tx_resp->frame_count == 1) {
 780                 __skb_queue_head_init(&skbs);
 781                 /*we can free until ssn % q.n_bd not inclusive */
 782                 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
 783                                   ssn, status, &skbs);
 784                 freed = 0;
 785                 while (!skb_queue_empty(&skbs)) {
 786                         skb = __skb_dequeue(&skbs);
 787                         hdr = (struct ieee80211_hdr *)skb->data;
 788
 789                         if (!ieee80211_is_data_qos(hdr->frame_control))
 790                                 priv->last_seq_ctl = tx_resp->seq_ctl;
 791
 792                         info = IEEE80211_SKB_CB(skb);
 793                         ctx = info->driver_data[0];
 794                         kmem_cache_free(priv->tx_cmd_pool,
 795                                         (info->driver_data[1]));
 796
 797                         memset(&info->status, 0, sizeof(info->status));
 798
 799                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
 800                             iwl_is_associated_ctx(ctx) && ctx->vif &&
 801                             ctx->vif->type == NL80211_IFTYPE_STATION) {
 802                                 ctx->last_tx_rejected = true;
 803                                 iwl_trans_stop_queue(trans(priv), txq_id);
 804
 805                                 IWL_DEBUG_TX_REPLY(priv,
 806                                            "TXQ %d status %s (0x%08x) "
 807                                            "rate_n_flags 0x%x retries %d\n",
 808                                            txq_id,
 809                                            iwl_get_tx_fail_reason(status),
 810                                            status,
 811                                            le32_to_cpu(tx_resp->rate_n_flags),
 812                                            tx_resp->failure_frame);
 813
 814                                 IWL_DEBUG_TX_REPLY(priv,
 815                                            "FrameCnt = %d, idx=%d\n",
 816                                            tx_resp->frame_count, cmd_index);
 817                         }
 818
 819                         /* check if BAR is needed */
 820                         if (is_agg && !iwl_is_tx_success(status))
 821                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 822                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
 823                                      tx_resp, is_agg);
 824                         if (!is_agg)
 825                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
 826
 827                         ieee80211_tx_status_irqsafe(priv->hw, skb);
 828
 829                         freed++;
 830                 }
 831
 832                 WARN_ON(!is_agg && freed != 1);
 833         }
 834
 835         iwl_check_abort_status(priv, tx_resp->frame_count, status);
 836         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 837         return 0;
 838 }
 839
 840 /**
 841  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
 842  *
 843  * Handles block-acknowledge notification from device, which reports success
 844  * of frames sent via aggregation.
 845  */
 846 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 847                                    struct iwl_rx_mem_buffer *rxb,
 848                                    struct iwl_device_cmd *cmd)
 849 {
 850         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 851         struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
 852         struct iwl_ht_agg *agg;
 853         struct sk_buff_head reclaimed_skbs;
 854         struct ieee80211_tx_info *info;
 855         struct ieee80211_hdr *hdr;
 856         struct sk_buff *skb;
 857         unsigned long flags;
 858         int sta_id;
 859         int tid;
 860         int freed;
 861
 862         /* "flow" corresponds to Tx queue */
 863         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
 864
 865         /* "ssn" is start of block-ack Tx window, corresponds to index
 866          * (in Tx queue's circular buffer) of first TFD/frame in window */
 867         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
 868
 869         if (scd_flow >= hw_params(priv).max_txq_num) {
 870                 IWL_ERR(priv,
 871                         "BUG_ON scd_flow is bigger than number of queues\n");
 872                 return 0;
 873         }
 874
 875         sta_id = ba_resp->sta_id;
 876         tid = ba_resp->tid;
 877         agg = &priv->shrd->tid_data[sta_id][tid].agg;
 878
 879         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 880
 881         if (unlikely(agg->txq_id != scd_flow)) {
 882                 /*
 883                  * FIXME: this is a uCode bug which need to be addressed,
 884                  * log the information and return for now!
 885                  * since it is possible happen very often and in order
 886                  * not to fill the syslog, don't enable the logging by default
 887                  */
 888                 IWL_DEBUG_TX_REPLY(priv,
 889                         "BA scd_flow %d does not match txq_id %d\n",
 890                         scd_flow, agg->txq_id);
 891                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 892                 return 0;
 893         }
 894
 895         if (unlikely(!agg->wait_for_ba)) {
 896                 if (unlikely(ba_resp->bitmap))
 897                         IWL_ERR(priv, "Received BA when not expected\n");
 898                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 899                 return 0;
 900         }
 901
 902         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
 903                            "sta_id = %d\n",
 904                            agg->wait_for_ba,
 905                            (u8 *) &ba_resp->sta_addr_lo32,
 906                            ba_resp->sta_id);
 907         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
 908                            "scd_flow = %d, scd_ssn = %d\n",
 909                            ba_resp->tid,
 910                            ba_resp->seq_ctl,
 911                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
 912                            ba_resp->scd_flow,
 913                            ba_resp->scd_ssn);
 914
 915         /* Mark that the expected block-ack response arrived */
 916         agg->wait_for_ba = false;
 917
 918         /* Sanity check values reported by uCode */
 919         if (ba_resp->txed_2_done > ba_resp->txed) {
 920                 IWL_DEBUG_TX_REPLY(priv,
 921                         "bogus sent(%d) and ack(%d) count\n",
 922                         ba_resp->txed, ba_resp->txed_2_done);
 923                 /*
 924                  * set txed_2_done = txed,
 925                  * so it won't impact rate scale
 926                  */
 927                 ba_resp->txed = ba_resp->txed_2_done;
 928         }
 929         IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
 930                         ba_resp->txed, ba_resp->txed_2_done);
 931
 932         __skb_queue_head_init(&reclaimed_skbs);
 933
 934         /* Release all TFDs before the SSN, i.e. all TFDs in front of
 935          * block-ack window (we assume that they've been successfully
 936          * transmitted ... if not, it's too late anyway). */
 937         iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
 938                           0, &reclaimed_skbs);
 939         freed = 0;
 940         while (!skb_queue_empty(&reclaimed_skbs)) {
 941
 942                 skb = __skb_dequeue(&reclaimed_skbs);
 943                 hdr = (struct ieee80211_hdr *)skb->data;
 944
 945                 if (ieee80211_is_data_qos(hdr->frame_control))
 946                         freed++;
 947                 else
 948                         WARN_ON_ONCE(1);
 949
 950                 info = IEEE80211_SKB_CB(skb);
 951                 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
 952
 953                 if (freed == 1) {
 954                         /* this is the first skb we deliver in this batch */
 955                         /* put the rate scaling data there */
 956                         info = IEEE80211_SKB_CB(skb);
 957                         memset(&info->status, 0, sizeof(info->status));
 958                         info->flags |= IEEE80211_TX_STAT_ACK;
 959                         info->flags |= IEEE80211_TX_STAT_AMPDU;
 960                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
 961                         info->status.ampdu_len = ba_resp->txed;
 962                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
 963                                                     info);
 964                 }
 965
 966                 ieee80211_tx_status_irqsafe(priv->hw, skb);
 967         }
 968
 969         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 970         return 0;
 971 }