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