Pileus Git - ~andy/linux/blob - 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         if (unlikely(ieee80211_is_probe_resp(fc))) {
 287                 struct iwl_wipan_noa_data *noa_data =
 288                         rcu_dereference(priv->noa_data);
 289
 290                 if (noa_data &&
 291                     pskb_expand_head(skb, 0, noa_data->length,
 292                                      GFP_ATOMIC) == 0) {
 293                         memcpy(skb_put(skb, noa_data->length),
 294                                noa_data->data, noa_data->length);
 295                         hdr = (struct ieee80211_hdr *)skb->data;
 296                 }
 297         }
 298
 299         hdr_len = ieee80211_hdrlen(fc);
 300
 301         /* For management frames use broadcast id to do not break aggregation */
 302         if (!ieee80211_is_data(fc))
 303                 sta_id = ctx->bcast_sta_id;
 304         else {
 305                 /* Find index into station table for destination station */
 306                 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
 307                 if (sta_id == IWL_INVALID_STATION) {
 308                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 309                                        hdr->addr1);
 310                         goto drop_unlock_priv;
 311                 }
 312         }
 313
 314         IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
 315
 316         if (info->control.sta)
 317                 sta_priv = (void *)info->control.sta->drv_priv;
 318
 319         if (sta_priv && sta_priv->asleep &&
 320             (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
 321                 /*
 322                  * This sends an asynchronous command to the device,
 323                  * but we can rely on it being processed before the
 324                  * next frame is processed -- and the next frame to
 325                  * this station is the one that will consume this
 326                  * counter.
 327                  * For now set the counter to just 1 since we do not
 328                  * support uAPSD yet.
 329                  */
 330                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 331         }
 332
 333         if (info->flags & IEEE80211_TX_CTL_AMPDU)
 334                 is_agg = true;
 335
 336         /* irqs already disabled/saved above when locking priv->shrd->lock */
 337         spin_lock(&priv->shrd->sta_lock);
 338
 339         dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
 340
 341         if (unlikely(!dev_cmd))
 342                 goto drop_unlock_sta;
 343
 344         memset(dev_cmd, 0, sizeof(*dev_cmd));
 345         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 346
 347         /* Total # bytes to be transmitted */
 348         len = (u16)skb->len;
 349         tx_cmd->len = cpu_to_le16(len);
 350
 351         if (info->control.hw_key)
 352                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
 353
 354         /* TODO need this for burst mode later on */
 355         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 356         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 357
 358         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
 359
 360         iwl_update_stats(priv, true, fc, len);
 361
 362         memset(&info->status, 0, sizeof(info->status));
 363
 364         info->driver_data[0] = ctx;
 365         info->driver_data[1] = dev_cmd;
 366
 367         if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
 368                 goto drop_unlock_sta;
 369
 370         spin_unlock(&priv->shrd->sta_lock);
 371         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 372
 373         /*
 374          * Avoid atomic ops if it isn't an associated client.
 375          * Also, if this is a packet for aggregation, don't
 376          * increase the counter because the ucode will stop
 377          * aggregation queues when their respective station
 378          * goes to sleep.
 379          */
 380         if (sta_priv && sta_priv->client && !is_agg)
 381                 atomic_inc(&sta_priv->pending_frames);
 382
 383         return 0;
 384
 385 drop_unlock_sta:
 386         if (dev_cmd)
 387                 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
 388         spin_unlock(&priv->shrd->sta_lock);
 389 drop_unlock_priv:
 390         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 391         return -1;
 392 }
 393
 394 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 395                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 396 {
 397         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 398         int sta_id;
 399         int ret;
 400
 401         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 402                      sta->addr, tid);
 403
 404         sta_id = iwl_sta_id(sta);
 405         if (sta_id == IWL_INVALID_STATION) {
 406                 IWL_ERR(priv, "Start AGG on invalid station\n");
 407                 return -ENXIO;
 408         }
 409         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 410                 return -EINVAL;
 411
 412         if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 413                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 414                 return -ENXIO;
 415         }
 416
 417         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 418         if (ret)
 419                 return ret;
 420
 421         ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
 422                                      tid, ssn);
 423
 424         return ret;
 425 }
 426
 427 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 428                        struct ieee80211_sta *sta, u16 tid)
 429 {
 430         int sta_id;
 431         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 432
 433         sta_id = iwl_sta_id(sta);
 434
 435         if (sta_id == IWL_INVALID_STATION) {
 436                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 437                 return -ENXIO;
 438         }
 439
 440         return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
 441                                         sta_id, tid);
 442 }
 443
 444 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 445                                      struct iwl_rxon_context *ctx,
 446                                      const u8 *addr1)
 447 {
 448         struct ieee80211_sta *sta;
 449         struct iwl_station_priv *sta_priv;
 450
 451         rcu_read_lock();
 452         sta = ieee80211_find_sta(ctx->vif, addr1);
 453         if (sta) {
 454                 sta_priv = (void *)sta->drv_priv;
 455                 /* avoid atomic ops if this isn't a client */
 456                 if (sta_priv->client &&
 457                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 458                         ieee80211_sta_block_awake(priv->hw, sta, false);
 459         }
 460         rcu_read_unlock();
 461 }
 462
 463 /**
 464  * translate ucode response to mac80211 tx status control values
 465  */
 466 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 467                                   struct ieee80211_tx_info *info)
 468 {
 469         struct ieee80211_tx_rate *r = &info->control.rates[0];
 470
 471         info->antenna_sel_tx =
 472                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 473         if (rate_n_flags & RATE_MCS_HT_MSK)
 474                 r->flags |= IEEE80211_TX_RC_MCS;
 475         if (rate_n_flags & RATE_MCS_GF_MSK)
 476                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 477         if (rate_n_flags & RATE_MCS_HT40_MSK)
 478                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 479         if (rate_n_flags & RATE_MCS_DUP_MSK)
 480                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 481         if (rate_n_flags & RATE_MCS_SGI_MSK)
 482                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 483         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 484 }
 485
 486 #ifdef CONFIG_IWLWIFI_DEBUG
 487 const char *iwl_get_tx_fail_reason(u32 status)
 488 {
 489 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 490 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 491
 492         switch (status & TX_STATUS_MSK) {
 493         case TX_STATUS_SUCCESS:
 494                 return "SUCCESS";
 495         TX_STATUS_POSTPONE(DELAY);
 496         TX_STATUS_POSTPONE(FEW_BYTES);
 497         TX_STATUS_POSTPONE(BT_PRIO);
 498         TX_STATUS_POSTPONE(QUIET_PERIOD);
 499         TX_STATUS_POSTPONE(CALC_TTAK);
 500         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 501         TX_STATUS_FAIL(SHORT_LIMIT);
 502         TX_STATUS_FAIL(LONG_LIMIT);
 503         TX_STATUS_FAIL(FIFO_UNDERRUN);
 504         TX_STATUS_FAIL(DRAIN_FLOW);
 505         TX_STATUS_FAIL(RFKILL_FLUSH);
 506         TX_STATUS_FAIL(LIFE_EXPIRE);
 507         TX_STATUS_FAIL(DEST_PS);
 508         TX_STATUS_FAIL(HOST_ABORTED);
 509         TX_STATUS_FAIL(BT_RETRY);
 510         TX_STATUS_FAIL(STA_INVALID);
 511         TX_STATUS_FAIL(FRAG_DROPPED);
 512         TX_STATUS_FAIL(TID_DISABLE);
 513         TX_STATUS_FAIL(FIFO_FLUSHED);
 514         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 515         TX_STATUS_FAIL(PASSIVE_NO_RX);
 516         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 517         }
 518
 519         return "UNKNOWN";
 520
 521 #undef TX_STATUS_FAIL
 522 #undef TX_STATUS_POSTPONE
 523 }
 524 #endif /* CONFIG_IWLWIFI_DEBUG */
 525
 526 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 527 {
 528         status &= AGG_TX_STATUS_MSK;
 529
 530         switch (status) {
 531         case AGG_TX_STATE_UNDERRUN_MSK:
 532                 priv->reply_agg_tx_stats.underrun++;
 533                 break;
 534         case AGG_TX_STATE_BT_PRIO_MSK:
 535                 priv->reply_agg_tx_stats.bt_prio++;
 536                 break;
 537         case AGG_TX_STATE_FEW_BYTES_MSK:
 538                 priv->reply_agg_tx_stats.few_bytes++;
 539                 break;
 540         case AGG_TX_STATE_ABORT_MSK:
 541                 priv->reply_agg_tx_stats.abort++;
 542                 break;
 543         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 544                 priv->reply_agg_tx_stats.last_sent_ttl++;
 545                 break;
 546         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 547                 priv->reply_agg_tx_stats.last_sent_try++;
 548                 break;
 549         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 550                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 551                 break;
 552         case AGG_TX_STATE_SCD_QUERY_MSK:
 553                 priv->reply_agg_tx_stats.scd_query++;
 554                 break;
 555         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 556                 priv->reply_agg_tx_stats.bad_crc32++;
 557                 break;
 558         case AGG_TX_STATE_RESPONSE_MSK:
 559                 priv->reply_agg_tx_stats.response++;
 560                 break;
 561         case AGG_TX_STATE_DUMP_TX_MSK:
 562                 priv->reply_agg_tx_stats.dump_tx++;
 563                 break;
 564         case AGG_TX_STATE_DELAY_TX_MSK:
 565                 priv->reply_agg_tx_stats.delay_tx++;
 566                 break;
 567         default:
 568                 priv->reply_agg_tx_stats.unknown++;
 569                 break;
 570         }
 571 }
 572
 573 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 574                                 struct iwlagn_tx_resp *tx_resp)
 575 {
 576         struct agg_tx_status *frame_status = &tx_resp->status;
 577         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 578                 IWLAGN_TX_RES_TID_POS;
 579         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 580                 IWLAGN_TX_RES_RA_POS;
 581         struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
 582         u32 status = le16_to_cpu(tx_resp->status.status);
 583         int i;
 584
 585         if (agg->wait_for_ba)
 586                 IWL_DEBUG_TX_REPLY(priv,
 587                         "got tx response w/o block-ack\n");
 588
 589         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 590         agg->wait_for_ba = (tx_resp->frame_count > 1);
 591
 592         /*
 593          * If the BT kill count is non-zero, we'll get this
 594          * notification again.
 595          */
 596         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 597             priv->cfg->bt_params &&
 598             priv->cfg->bt_params->advanced_bt_coexist) {
 599                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 600         }
 601
 602         if (tx_resp->frame_count == 1)
 603                 return;
 604
 605         /* Construct bit-map of pending frames within Tx window */
 606         for (i = 0; i < tx_resp->frame_count; i++) {
 607                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 608
 609                 if (status & AGG_TX_STATUS_MSK)
 610                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 611
 612                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 613                               AGG_TX_STATE_ABORT_MSK))
 614                         continue;
 615
 616                 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
 617                                    "try-count (0x%08x)\n",
 618                                    iwl_get_agg_tx_fail_reason(fstatus),
 619                                    fstatus & AGG_TX_STATUS_MSK,
 620                                    fstatus & AGG_TX_TRY_MSK);
 621         }
 622 }
 623
 624 #ifdef CONFIG_IWLWIFI_DEBUG
 625 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 626
 627 const char *iwl_get_agg_tx_fail_reason(u16 status)
 628 {
 629         status &= AGG_TX_STATUS_MSK;
 630         switch (status) {
 631         case AGG_TX_STATE_TRANSMITTED:
 632                 return "SUCCESS";
 633                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 634                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 635                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 636                 AGG_TX_STATE_FAIL(ABORT_MSK);
 637                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 638                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 639                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 640                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 641                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 642                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 643                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 644                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
 645         }
 646
 647         return "UNKNOWN";
 648 }
 649 #endif /* CONFIG_IWLWIFI_DEBUG */
 650
 651 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 652 {
 653         return le32_to_cpup((__le32 *)&tx_resp->status +
 654                             tx_resp->frame_count) & MAX_SN;
 655 }
 656
 657 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
 658 {
 659         status &= TX_STATUS_MSK;
 660
 661         switch (status) {
 662         case TX_STATUS_POSTPONE_DELAY:
 663                 priv->reply_tx_stats.pp_delay++;
 664                 break;
 665         case TX_STATUS_POSTPONE_FEW_BYTES:
 666                 priv->reply_tx_stats.pp_few_bytes++;
 667                 break;
 668         case TX_STATUS_POSTPONE_BT_PRIO:
 669                 priv->reply_tx_stats.pp_bt_prio++;
 670                 break;
 671         case TX_STATUS_POSTPONE_QUIET_PERIOD:
 672                 priv->reply_tx_stats.pp_quiet_period++;
 673                 break;
 674         case TX_STATUS_POSTPONE_CALC_TTAK:
 675                 priv->reply_tx_stats.pp_calc_ttak++;
 676                 break;
 677         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
 678                 priv->reply_tx_stats.int_crossed_retry++;
 679                 break;
 680         case TX_STATUS_FAIL_SHORT_LIMIT:
 681                 priv->reply_tx_stats.short_limit++;
 682                 break;
 683         case TX_STATUS_FAIL_LONG_LIMIT:
 684                 priv->reply_tx_stats.long_limit++;
 685                 break;
 686         case TX_STATUS_FAIL_FIFO_UNDERRUN:
 687                 priv->reply_tx_stats.fifo_underrun++;
 688                 break;
 689         case TX_STATUS_FAIL_DRAIN_FLOW:
 690                 priv->reply_tx_stats.drain_flow++;
 691                 break;
 692         case TX_STATUS_FAIL_RFKILL_FLUSH:
 693                 priv->reply_tx_stats.rfkill_flush++;
 694                 break;
 695         case TX_STATUS_FAIL_LIFE_EXPIRE:
 696                 priv->reply_tx_stats.life_expire++;
 697                 break;
 698         case TX_STATUS_FAIL_DEST_PS:
 699                 priv->reply_tx_stats.dest_ps++;
 700                 break;
 701         case TX_STATUS_FAIL_HOST_ABORTED:
 702                 priv->reply_tx_stats.host_abort++;
 703                 break;
 704         case TX_STATUS_FAIL_BT_RETRY:
 705                 priv->reply_tx_stats.bt_retry++;
 706                 break;
 707         case TX_STATUS_FAIL_STA_INVALID:
 708                 priv->reply_tx_stats.sta_invalid++;
 709                 break;
 710         case TX_STATUS_FAIL_FRAG_DROPPED:
 711                 priv->reply_tx_stats.frag_drop++;
 712                 break;
 713         case TX_STATUS_FAIL_TID_DISABLE:
 714                 priv->reply_tx_stats.tid_disable++;
 715                 break;
 716         case TX_STATUS_FAIL_FIFO_FLUSHED:
 717                 priv->reply_tx_stats.fifo_flush++;
 718                 break;
 719         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
 720                 priv->reply_tx_stats.insuff_cf_poll++;
 721                 break;
 722         case TX_STATUS_FAIL_PASSIVE_NO_RX:
 723                 priv->reply_tx_stats.fail_hw_drop++;
 724                 break;
 725         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
 726                 priv->reply_tx_stats.sta_color_mismatch++;
 727                 break;
 728         default:
 729                 priv->reply_tx_stats.unknown++;
 730                 break;
 731         }
 732 }
 733
 734 static void iwlagn_set_tx_status(struct iwl_priv *priv,
 735                                  struct ieee80211_tx_info *info,
 736                                  struct iwlagn_tx_resp *tx_resp,
 737                                  bool is_agg)
 738 {
 739         u16  status = le16_to_cpu(tx_resp->status.status);
 740
 741         info->status.rates[0].count = tx_resp->failure_frame + 1;
 742         if (is_agg)
 743                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 744         info->flags |= iwl_tx_status_to_mac80211(status);
 745         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
 746                                     info);
 747         if (!iwl_is_tx_success(status))
 748                 iwlagn_count_tx_err_status(priv, status);
 749 }
 750
 751 static void iwl_check_abort_status(struct iwl_priv *priv,
 752                             u8 frame_count, u32 status)
 753 {
 754         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
 755                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
 756                 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 757                         queue_work(priv->shrd->workqueue, &priv->tx_flush);
 758         }
 759 }
 760
 761 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 762                                struct iwl_device_cmd *cmd)
 763 {
 764         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 765         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 766         int txq_id = SEQ_TO_QUEUE(sequence);
 767         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
 768         struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 769         struct ieee80211_hdr *hdr;
 770         u32 status = le16_to_cpu(tx_resp->status.status);
 771         u32 ssn = iwlagn_get_scd_ssn(tx_resp);
 772         int tid;
 773         int sta_id;
 774         int freed;
 775         struct ieee80211_tx_info *info;
 776         unsigned long flags;
 777         struct sk_buff_head skbs;
 778         struct sk_buff *skb;
 779         struct iwl_rxon_context *ctx;
 780         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
 781
 782         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 783                 IWLAGN_TX_RES_TID_POS;
 784         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 785                 IWLAGN_TX_RES_RA_POS;
 786
 787         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 788
 789         if (is_agg)
 790                 iwl_rx_reply_tx_agg(priv, tx_resp);
 791
 792         if (tx_resp->frame_count == 1) {
 793                 IWL_DEBUG_TX_REPLY(priv, "Q %d, ssn %d", txq_id, ssn);
 794                 __skb_queue_head_init(&skbs);
 795                 /*we can free until ssn % q.n_bd not inclusive */
 796                 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
 797                                   ssn, status, &skbs);
 798                 freed = 0;
 799                 while (!skb_queue_empty(&skbs)) {
 800                         skb = __skb_dequeue(&skbs);
 801                         hdr = (struct ieee80211_hdr *)skb->data;
 802
 803                         if (!ieee80211_is_data_qos(hdr->frame_control))
 804                                 priv->last_seq_ctl = tx_resp->seq_ctl;
 805
 806                         info = IEEE80211_SKB_CB(skb);
 807                         ctx = info->driver_data[0];
 808                         kmem_cache_free(priv->tx_cmd_pool,
 809                                         (info->driver_data[1]));
 810
 811                         memset(&info->status, 0, sizeof(info->status));
 812
 813                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
 814                             iwl_is_associated_ctx(ctx) && ctx->vif &&
 815                             ctx->vif->type == NL80211_IFTYPE_STATION) {
 816                                 ctx->last_tx_rejected = true;
 817                                 iwl_trans_stop_queue(trans(priv), txq_id,
 818                                         "Tx on passive channel");
 819
 820                                 IWL_DEBUG_TX_REPLY(priv,
 821                                            "TXQ %d status %s (0x%08x) "
 822                                            "rate_n_flags 0x%x retries %d\n",
 823                                            txq_id,
 824                                            iwl_get_tx_fail_reason(status),
 825                                            status,
 826                                            le32_to_cpu(tx_resp->rate_n_flags),
 827                                            tx_resp->failure_frame);
 828
 829                                 IWL_DEBUG_TX_REPLY(priv,
 830                                            "FrameCnt = %d, idx=%d\n",
 831                                            tx_resp->frame_count, cmd_index);
 832                         }
 833
 834                         /* check if BAR is needed */
 835                         if (is_agg && !iwl_is_tx_success(status))
 836                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 837                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
 838                                      tx_resp, is_agg);
 839                         if (!is_agg)
 840                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
 841
 842                         ieee80211_tx_status_irqsafe(priv->hw, skb);
 843
 844                         freed++;
 845                 }
 846
 847                 WARN_ON(!is_agg && freed != 1);
 848         }
 849
 850         iwl_check_abort_status(priv, tx_resp->frame_count, status);
 851         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 852         return 0;
 853 }
 854
 855 /**
 856  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
 857  *
 858  * Handles block-acknowledge notification from device, which reports success
 859  * of frames sent via aggregation.
 860  */
 861 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 862                                    struct iwl_rx_mem_buffer *rxb,
 863                                    struct iwl_device_cmd *cmd)
 864 {
 865         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 866         struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
 867         struct iwl_ht_agg *agg;
 868         struct sk_buff_head reclaimed_skbs;
 869         struct ieee80211_tx_info *info;
 870         struct ieee80211_hdr *hdr;
 871         struct sk_buff *skb;
 872         unsigned long flags;
 873         int sta_id;
 874         int tid;
 875         int freed;
 876
 877         /* "flow" corresponds to Tx queue */
 878         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
 879
 880         /* "ssn" is start of block-ack Tx window, corresponds to index
 881          * (in Tx queue's circular buffer) of first TFD/frame in window */
 882         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
 883
 884         if (scd_flow >= hw_params(priv).max_txq_num) {
 885                 IWL_ERR(priv,
 886                         "BUG_ON scd_flow is bigger than number of queues\n");
 887                 return 0;
 888         }
 889
 890         sta_id = ba_resp->sta_id;
 891         tid = ba_resp->tid;
 892         agg = &priv->shrd->tid_data[sta_id][tid].agg;
 893
 894         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 895
 896         if (unlikely(agg->txq_id != scd_flow)) {
 897                 /*
 898                  * FIXME: this is a uCode bug which need to be addressed,
 899                  * log the information and return for now!
 900                  * since it is possible happen very often and in order
 901                  * not to fill the syslog, don't enable the logging by default
 902                  */
 903                 IWL_DEBUG_TX_REPLY(priv,
 904                         "BA scd_flow %d does not match txq_id %d\n",
 905                         scd_flow, agg->txq_id);
 906                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 907                 return 0;
 908         }
 909
 910         if (unlikely(!agg->wait_for_ba)) {
 911                 if (unlikely(ba_resp->bitmap))
 912                         IWL_ERR(priv, "Received BA when not expected\n");
 913                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 914                 return 0;
 915         }
 916
 917         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
 918                            "sta_id = %d\n",
 919                            agg->wait_for_ba,
 920                            (u8 *) &ba_resp->sta_addr_lo32,
 921                            ba_resp->sta_id);
 922         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
 923                            "scd_flow = %d, scd_ssn = %d\n",
 924                            ba_resp->tid, ba_resp->seq_ctl,
 925                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
 926                            scd_flow, ba_resp_scd_ssn);
 927
 928         /* Mark that the expected block-ack response arrived */
 929         agg->wait_for_ba = false;
 930
 931         /* Sanity check values reported by uCode */
 932         if (ba_resp->txed_2_done > ba_resp->txed) {
 933                 IWL_DEBUG_TX_REPLY(priv,
 934                         "bogus sent(%d) and ack(%d) count\n",
 935                         ba_resp->txed, ba_resp->txed_2_done);
 936                 /*
 937                  * set txed_2_done = txed,
 938                  * so it won't impact rate scale
 939                  */
 940                 ba_resp->txed = ba_resp->txed_2_done;
 941         }
 942         IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
 943                         ba_resp->txed, ba_resp->txed_2_done);
 944
 945         __skb_queue_head_init(&reclaimed_skbs);
 946
 947         /* Release all TFDs before the SSN, i.e. all TFDs in front of
 948          * block-ack window (we assume that they've been successfully
 949          * transmitted ... if not, it's too late anyway). */
 950         iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
 951                           0, &reclaimed_skbs);
 952         freed = 0;
 953         while (!skb_queue_empty(&reclaimed_skbs)) {
 954
 955                 skb = __skb_dequeue(&reclaimed_skbs);
 956                 hdr = (struct ieee80211_hdr *)skb->data;
 957
 958                 if (ieee80211_is_data_qos(hdr->frame_control))
 959                         freed++;
 960                 else
 961                         WARN_ON_ONCE(1);
 962
 963                 info = IEEE80211_SKB_CB(skb);
 964                 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
 965
 966                 if (freed == 1) {
 967                         /* this is the first skb we deliver in this batch */
 968                         /* put the rate scaling data there */
 969                         info = IEEE80211_SKB_CB(skb);
 970                         memset(&info->status, 0, sizeof(info->status));
 971                         info->flags |= IEEE80211_TX_STAT_ACK;
 972                         info->flags |= IEEE80211_TX_STAT_AMPDU;
 973                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
 974                         info->status.ampdu_len = ba_resp->txed;
 975                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
 976                                                     info);
 977                 }
 978
 979                 ieee80211_tx_status_irqsafe(priv->hw, skb);
 980         }
 981
 982         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 983         return 0;
 984 }