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                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
  95                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
  96                 else
  97                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
  98         }
  99
 100         iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
 101
 102         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 103         if (ieee80211_is_mgmt(fc)) {
 104                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 105                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 106                 else
 107                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 108         } else {
 109                 tx_cmd->timeout.pm_frame_timeout = 0;
 110         }
 111
 112         tx_cmd->driver_txop = 0;
 113         tx_cmd->tx_flags = tx_flags;
 114         tx_cmd->next_frame_len = 0;
 115 }
 116
 117 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
 118                                      struct iwl_tx_cmd *tx_cmd,
 119                                      struct ieee80211_tx_info *info,
 120                                      __le16 fc)
 121 {
 122         u32 rate_flags;
 123         int rate_idx;
 124         u8 rts_retry_limit;
 125         u8 data_retry_limit;
 126         u8 rate_plcp;
 127
 128         if (priv->shrd->wowlan) {
 129                 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 130                 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
 131         } else {
 132                 /* Set retry limit on RTS packets */
 133                 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
 134
 135                 /* Set retry limit on DATA packets and Probe Responses*/
 136                 if (ieee80211_is_probe_resp(fc)) {
 137                         data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
 138                         rts_retry_limit =
 139                                 min(data_retry_limit, rts_retry_limit);
 140                 } else if (ieee80211_is_back_req(fc))
 141                         data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
 142                 else
 143                         data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
 144         }
 145
 146         tx_cmd->data_retry_limit = data_retry_limit;
 147         tx_cmd->rts_retry_limit = rts_retry_limit;
 148
 149         /* DATA packets will use the uCode station table for rate/antenna
 150          * selection */
 151         if (ieee80211_is_data(fc)) {
 152                 tx_cmd->initial_rate_index = 0;
 153                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 154 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
 155                 if (priv->tm_fixed_rate) {
 156                         /*
 157                          * rate overwrite by testmode
 158                          * we not only send lq command to change rate
 159                          * we also re-enforce per data pkt base.
 160                          */
 161                         tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
 162                         memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
 163                                sizeof(tx_cmd->rate_n_flags));
 164                 }
 165 #endif
 166                 return;
 167         }
 168
 169         /**
 170          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 171          * not really a TX rate.  Thus, we use the lowest supported rate for
 172          * this band.  Also use the lowest supported rate if the stored rate
 173          * index is invalid.
 174          */
 175         rate_idx = info->control.rates[0].idx;
 176         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 177                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 178                 rate_idx = rate_lowest_index(&priv->bands[info->band],
 179                                 info->control.sta);
 180         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 181         if (info->band == IEEE80211_BAND_5GHZ)
 182                 rate_idx += IWL_FIRST_OFDM_RATE;
 183         /* Get PLCP rate for tx_cmd->rate_n_flags */
 184         rate_plcp = iwl_rates[rate_idx].plcp;
 185         /* Zero out flags for this packet */
 186         rate_flags = 0;
 187
 188         /* Set CCK flag as needed */
 189         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 190                 rate_flags |= RATE_MCS_CCK_MSK;
 191
 192         /* Set up antennas */
 193          if (priv->cfg->bt_params &&
 194              priv->cfg->bt_params->advanced_bt_coexist &&
 195              priv->bt_full_concurrent) {
 196                 /* operated as 1x1 in full concurrency mode */
 197                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 198                                 first_antenna(hw_params(priv).valid_tx_ant));
 199         } else
 200                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 201                                                 hw_params(priv).valid_tx_ant);
 202         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 203
 204         /* Set the rate in the TX cmd */
 205         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 206 }
 207
 208 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 209                                       struct ieee80211_tx_info *info,
 210                                       struct iwl_tx_cmd *tx_cmd,
 211                                       struct sk_buff *skb_frag,
 212                                       int sta_id)
 213 {
 214         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 215
 216         switch (keyconf->cipher) {
 217         case WLAN_CIPHER_SUITE_CCMP:
 218                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 219                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 220                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 221                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 222                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 223                 break;
 224
 225         case WLAN_CIPHER_SUITE_TKIP:
 226                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 227                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 228                 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
 229                 break;
 230
 231         case WLAN_CIPHER_SUITE_WEP104:
 232                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 233                 /* fall through */
 234         case WLAN_CIPHER_SUITE_WEP40:
 235                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 236                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 237
 238                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 239
 240                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 241                              "with key %d\n", keyconf->keyidx);
 242                 break;
 243
 244         default:
 245                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 246                 break;
 247         }
 248 }
 249
 250 /*
 251  * start REPLY_TX command process
 252  */
 253 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 254 {
 255         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 256         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 257         struct iwl_station_priv *sta_priv = NULL;
 258         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 259         struct iwl_device_cmd *dev_cmd = NULL;
 260         struct iwl_tx_cmd *tx_cmd;
 261
 262         __le16 fc;
 263         u8 hdr_len;
 264         u16 len;
 265         u8 sta_id;
 266         unsigned long flags;
 267         bool is_agg = false;
 268
 269         if (info->control.vif)
 270                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 271
 272         spin_lock_irqsave(&priv->shrd->lock, flags);
 273         if (iwl_is_rfkill(priv->shrd)) {
 274                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 275                 goto drop_unlock_priv;
 276         }
 277
 278         fc = hdr->frame_control;
 279
 280 #ifdef CONFIG_IWLWIFI_DEBUG
 281         if (ieee80211_is_auth(fc))
 282                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 283         else if (ieee80211_is_assoc_req(fc))
 284                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 285         else if (ieee80211_is_reassoc_req(fc))
 286                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 287 #endif
 288
 289         hdr_len = ieee80211_hdrlen(fc);
 290
 291         /* For management frames use broadcast id to do not break aggregation */
 292         if (!ieee80211_is_data(fc))
 293                 sta_id = ctx->bcast_sta_id;
 294         else {
 295                 /* Find index into station table for destination station */
 296                 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
 297                 if (sta_id == IWL_INVALID_STATION) {
 298                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 299                                        hdr->addr1);
 300                         goto drop_unlock_priv;
 301                 }
 302         }
 303
 304         IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
 305
 306         if (info->control.sta)
 307                 sta_priv = (void *)info->control.sta->drv_priv;
 308
 309         if (sta_priv && sta_priv->asleep &&
 310             (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
 311                 /*
 312                  * This sends an asynchronous command to the device,
 313                  * but we can rely on it being processed before the
 314                  * next frame is processed -- and the next frame to
 315                  * this station is the one that will consume this
 316                  * counter.
 317                  * For now set the counter to just 1 since we do not
 318                  * support uAPSD yet.
 319                  */
 320                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 321         }
 322
 323         if (info->flags & IEEE80211_TX_CTL_AMPDU)
 324                 is_agg = true;
 325
 326         /* irqs already disabled/saved above when locking priv->shrd->lock */
 327         spin_lock(&priv->shrd->sta_lock);
 328
 329         dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
 330
 331         if (unlikely(!dev_cmd))
 332                 goto drop_unlock_sta;
 333
 334         memset(dev_cmd, 0, sizeof(*dev_cmd));
 335         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 336
 337         /* Total # bytes to be transmitted */
 338         len = (u16)skb->len;
 339         tx_cmd->len = cpu_to_le16(len);
 340
 341         if (info->control.hw_key)
 342                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
 343
 344         /* TODO need this for burst mode later on */
 345         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 346         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 347
 348         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
 349
 350         iwl_update_stats(priv, true, fc, len);
 351
 352         memset(&info->status, 0, sizeof(info->status));
 353
 354         info->driver_data[0] = ctx;
 355         info->driver_data[1] = dev_cmd;
 356
 357         if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
 358                 goto drop_unlock_sta;
 359
 360         spin_unlock(&priv->shrd->sta_lock);
 361         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 362
 363         /*
 364          * Avoid atomic ops if it isn't an associated client.
 365          * Also, if this is a packet for aggregation, don't
 366          * increase the counter because the ucode will stop
 367          * aggregation queues when their respective station
 368          * goes to sleep.
 369          */
 370         if (sta_priv && sta_priv->client && !is_agg)
 371                 atomic_inc(&sta_priv->pending_frames);
 372
 373         return 0;
 374
 375 drop_unlock_sta:
 376         if (dev_cmd)
 377                 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
 378         spin_unlock(&priv->shrd->sta_lock);
 379 drop_unlock_priv:
 380         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 381         return -1;
 382 }
 383
 384 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 385                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 386 {
 387         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 388         int sta_id;
 389         int ret;
 390
 391         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 392                      sta->addr, tid);
 393
 394         sta_id = iwl_sta_id(sta);
 395         if (sta_id == IWL_INVALID_STATION) {
 396                 IWL_ERR(priv, "Start AGG on invalid station\n");
 397                 return -ENXIO;
 398         }
 399         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 400                 return -EINVAL;
 401
 402         if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 403                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 404                 return -ENXIO;
 405         }
 406
 407         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 408         if (ret)
 409                 return ret;
 410
 411         ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
 412                                      tid, ssn);
 413
 414         return ret;
 415 }
 416
 417 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 418                        struct ieee80211_sta *sta, u16 tid)
 419 {
 420         int sta_id;
 421         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 422
 423         sta_id = iwl_sta_id(sta);
 424
 425         if (sta_id == IWL_INVALID_STATION) {
 426                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 427                 return -ENXIO;
 428         }
 429
 430         return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
 431                                         sta_id, tid);
 432 }
 433
 434 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 435                                      struct iwl_rxon_context *ctx,
 436                                      const u8 *addr1)
 437 {
 438         struct ieee80211_sta *sta;
 439         struct iwl_station_priv *sta_priv;
 440
 441         rcu_read_lock();
 442         sta = ieee80211_find_sta(ctx->vif, addr1);
 443         if (sta) {
 444                 sta_priv = (void *)sta->drv_priv;
 445                 /* avoid atomic ops if this isn't a client */
 446                 if (sta_priv->client &&
 447                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 448                         ieee80211_sta_block_awake(priv->hw, sta, false);
 449         }
 450         rcu_read_unlock();
 451 }
 452
 453 /**
 454  * translate ucode response to mac80211 tx status control values
 455  */
 456 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 457                                   struct ieee80211_tx_info *info)
 458 {
 459         struct ieee80211_tx_rate *r = &info->control.rates[0];
 460
 461         info->antenna_sel_tx =
 462                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 463         if (rate_n_flags & RATE_MCS_HT_MSK)
 464                 r->flags |= IEEE80211_TX_RC_MCS;
 465         if (rate_n_flags & RATE_MCS_GF_MSK)
 466                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 467         if (rate_n_flags & RATE_MCS_HT40_MSK)
 468                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 469         if (rate_n_flags & RATE_MCS_DUP_MSK)
 470                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 471         if (rate_n_flags & RATE_MCS_SGI_MSK)
 472                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 473         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 474 }
 475
 476 #ifdef CONFIG_IWLWIFI_DEBUG
 477 const char *iwl_get_tx_fail_reason(u32 status)
 478 {
 479 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 480 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 481
 482         switch (status & TX_STATUS_MSK) {
 483         case TX_STATUS_SUCCESS:
 484                 return "SUCCESS";
 485         TX_STATUS_POSTPONE(DELAY);
 486         TX_STATUS_POSTPONE(FEW_BYTES);
 487         TX_STATUS_POSTPONE(BT_PRIO);
 488         TX_STATUS_POSTPONE(QUIET_PERIOD);
 489         TX_STATUS_POSTPONE(CALC_TTAK);
 490         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 491         TX_STATUS_FAIL(SHORT_LIMIT);
 492         TX_STATUS_FAIL(LONG_LIMIT);
 493         TX_STATUS_FAIL(FIFO_UNDERRUN);
 494         TX_STATUS_FAIL(DRAIN_FLOW);
 495         TX_STATUS_FAIL(RFKILL_FLUSH);
 496         TX_STATUS_FAIL(LIFE_EXPIRE);
 497         TX_STATUS_FAIL(DEST_PS);
 498         TX_STATUS_FAIL(HOST_ABORTED);
 499         TX_STATUS_FAIL(BT_RETRY);
 500         TX_STATUS_FAIL(STA_INVALID);
 501         TX_STATUS_FAIL(FRAG_DROPPED);
 502         TX_STATUS_FAIL(TID_DISABLE);
 503         TX_STATUS_FAIL(FIFO_FLUSHED);
 504         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 505         TX_STATUS_FAIL(PASSIVE_NO_RX);
 506         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 507         }
 508
 509         return "UNKNOWN";
 510
 511 #undef TX_STATUS_FAIL
 512 #undef TX_STATUS_POSTPONE
 513 }
 514 #endif /* CONFIG_IWLWIFI_DEBUG */
 515
 516 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 517 {
 518         status &= AGG_TX_STATUS_MSK;
 519
 520         switch (status) {
 521         case AGG_TX_STATE_UNDERRUN_MSK:
 522                 priv->reply_agg_tx_stats.underrun++;
 523                 break;
 524         case AGG_TX_STATE_BT_PRIO_MSK:
 525                 priv->reply_agg_tx_stats.bt_prio++;
 526                 break;
 527         case AGG_TX_STATE_FEW_BYTES_MSK:
 528                 priv->reply_agg_tx_stats.few_bytes++;
 529                 break;
 530         case AGG_TX_STATE_ABORT_MSK:
 531                 priv->reply_agg_tx_stats.abort++;
 532                 break;
 533         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 534                 priv->reply_agg_tx_stats.last_sent_ttl++;
 535                 break;
 536         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 537                 priv->reply_agg_tx_stats.last_sent_try++;
 538                 break;
 539         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 540                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 541                 break;
 542         case AGG_TX_STATE_SCD_QUERY_MSK:
 543                 priv->reply_agg_tx_stats.scd_query++;
 544                 break;
 545         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 546                 priv->reply_agg_tx_stats.bad_crc32++;
 547                 break;
 548         case AGG_TX_STATE_RESPONSE_MSK:
 549                 priv->reply_agg_tx_stats.response++;
 550                 break;
 551         case AGG_TX_STATE_DUMP_TX_MSK:
 552                 priv->reply_agg_tx_stats.dump_tx++;
 553                 break;
 554         case AGG_TX_STATE_DELAY_TX_MSK:
 555                 priv->reply_agg_tx_stats.delay_tx++;
 556                 break;
 557         default:
 558                 priv->reply_agg_tx_stats.unknown++;
 559                 break;
 560         }
 561 }
 562
 563 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 564                                 struct iwlagn_tx_resp *tx_resp)
 565 {
 566         struct agg_tx_status *frame_status = &tx_resp->status;
 567         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 568                 IWLAGN_TX_RES_TID_POS;
 569         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 570                 IWLAGN_TX_RES_RA_POS;
 571         struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
 572         u32 status = le16_to_cpu(tx_resp->status.status);
 573         int i;
 574
 575         if (agg->wait_for_ba)
 576                 IWL_DEBUG_TX_REPLY(priv,
 577                         "got tx response w/o block-ack\n");
 578
 579         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 580         agg->wait_for_ba = (tx_resp->frame_count > 1);
 581
 582         /*
 583          * If the BT kill count is non-zero, we'll get this
 584          * notification again.
 585          */
 586         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 587             priv->cfg->bt_params &&
 588             priv->cfg->bt_params->advanced_bt_coexist) {
 589                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 590         }
 591
 592         if (tx_resp->frame_count == 1)
 593                 return;
 594
 595         /* Construct bit-map of pending frames within Tx window */
 596         for (i = 0; i < tx_resp->frame_count; i++) {
 597                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 598
 599                 if (status & AGG_TX_STATUS_MSK)
 600                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 601
 602                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 603                               AGG_TX_STATE_ABORT_MSK))
 604                         continue;
 605
 606                 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
 607                                    "try-count (0x%08x)\n",
 608                                    iwl_get_agg_tx_fail_reason(fstatus),
 609                                    fstatus & AGG_TX_STATUS_MSK,
 610                                    fstatus & AGG_TX_TRY_MSK);
 611         }
 612 }
 613
 614 #ifdef CONFIG_IWLWIFI_DEBUG
 615 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 616
 617 const char *iwl_get_agg_tx_fail_reason(u16 status)
 618 {
 619         status &= AGG_TX_STATUS_MSK;
 620         switch (status) {
 621         case AGG_TX_STATE_TRANSMITTED:
 622                 return "SUCCESS";
 623                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 624                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 625                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 626                 AGG_TX_STATE_FAIL(ABORT_MSK);
 627                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 628                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 629                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 630                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 631                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 632                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 633                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 634                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
 635         }
 636
 637         return "UNKNOWN";
 638 }
 639 #endif /* CONFIG_IWLWIFI_DEBUG */
 640
 641 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 642 {
 643         return le32_to_cpup((__le32 *)&tx_resp->status +
 644                             tx_resp->frame_count) & MAX_SN;
 645 }
 646
 647 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
 648 {
 649         status &= TX_STATUS_MSK;
 650
 651         switch (status) {
 652         case TX_STATUS_POSTPONE_DELAY:
 653                 priv->reply_tx_stats.pp_delay++;
 654                 break;
 655         case TX_STATUS_POSTPONE_FEW_BYTES:
 656                 priv->reply_tx_stats.pp_few_bytes++;
 657                 break;
 658         case TX_STATUS_POSTPONE_BT_PRIO:
 659                 priv->reply_tx_stats.pp_bt_prio++;
 660                 break;
 661         case TX_STATUS_POSTPONE_QUIET_PERIOD:
 662                 priv->reply_tx_stats.pp_quiet_period++;
 663                 break;
 664         case TX_STATUS_POSTPONE_CALC_TTAK:
 665                 priv->reply_tx_stats.pp_calc_ttak++;
 666                 break;
 667         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
 668                 priv->reply_tx_stats.int_crossed_retry++;
 669                 break;
 670         case TX_STATUS_FAIL_SHORT_LIMIT:
 671                 priv->reply_tx_stats.short_limit++;
 672                 break;
 673         case TX_STATUS_FAIL_LONG_LIMIT:
 674                 priv->reply_tx_stats.long_limit++;
 675                 break;
 676         case TX_STATUS_FAIL_FIFO_UNDERRUN:
 677                 priv->reply_tx_stats.fifo_underrun++;
 678                 break;
 679         case TX_STATUS_FAIL_DRAIN_FLOW:
 680                 priv->reply_tx_stats.drain_flow++;
 681                 break;
 682         case TX_STATUS_FAIL_RFKILL_FLUSH:
 683                 priv->reply_tx_stats.rfkill_flush++;
 684                 break;
 685         case TX_STATUS_FAIL_LIFE_EXPIRE:
 686                 priv->reply_tx_stats.life_expire++;
 687                 break;
 688         case TX_STATUS_FAIL_DEST_PS:
 689                 priv->reply_tx_stats.dest_ps++;
 690                 break;
 691         case TX_STATUS_FAIL_HOST_ABORTED:
 692                 priv->reply_tx_stats.host_abort++;
 693                 break;
 694         case TX_STATUS_FAIL_BT_RETRY:
 695                 priv->reply_tx_stats.bt_retry++;
 696                 break;
 697         case TX_STATUS_FAIL_STA_INVALID:
 698                 priv->reply_tx_stats.sta_invalid++;
 699                 break;
 700         case TX_STATUS_FAIL_FRAG_DROPPED:
 701                 priv->reply_tx_stats.frag_drop++;
 702                 break;
 703         case TX_STATUS_FAIL_TID_DISABLE:
 704                 priv->reply_tx_stats.tid_disable++;
 705                 break;
 706         case TX_STATUS_FAIL_FIFO_FLUSHED:
 707                 priv->reply_tx_stats.fifo_flush++;
 708                 break;
 709         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
 710                 priv->reply_tx_stats.insuff_cf_poll++;
 711                 break;
 712         case TX_STATUS_FAIL_PASSIVE_NO_RX:
 713                 priv->reply_tx_stats.fail_hw_drop++;
 714                 break;
 715         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
 716                 priv->reply_tx_stats.sta_color_mismatch++;
 717                 break;
 718         default:
 719                 priv->reply_tx_stats.unknown++;
 720                 break;
 721         }
 722 }
 723
 724 static void iwlagn_set_tx_status(struct iwl_priv *priv,
 725                                  struct ieee80211_tx_info *info,
 726                                  struct iwlagn_tx_resp *tx_resp,
 727                                  bool is_agg)
 728 {
 729         u16  status = le16_to_cpu(tx_resp->status.status);
 730
 731         info->status.rates[0].count = tx_resp->failure_frame + 1;
 732         if (is_agg)
 733                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 734         info->flags |= iwl_tx_status_to_mac80211(status);
 735         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
 736                                     info);
 737         if (!iwl_is_tx_success(status))
 738                 iwlagn_count_tx_err_status(priv, status);
 739 }
 740
 741 static void iwl_check_abort_status(struct iwl_priv *priv,
 742                             u8 frame_count, u32 status)
 743 {
 744         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
 745                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
 746                 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 747                         queue_work(priv->shrd->workqueue, &priv->tx_flush);
 748         }
 749 }
 750
 751 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 752                                struct iwl_device_cmd *cmd)
 753 {
 754         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 755         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 756         int txq_id = SEQ_TO_QUEUE(sequence);
 757         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
 758         struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 759         struct ieee80211_hdr *hdr;
 760         u32 status = le16_to_cpu(tx_resp->status.status);
 761         u32 ssn = iwlagn_get_scd_ssn(tx_resp);
 762         int tid;
 763         int sta_id;
 764         int freed;
 765         struct ieee80211_tx_info *info;
 766         unsigned long flags;
 767         struct sk_buff_head skbs;
 768         struct sk_buff *skb;
 769         struct iwl_rxon_context *ctx;
 770         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
 771
 772         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 773                 IWLAGN_TX_RES_TID_POS;
 774         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 775                 IWLAGN_TX_RES_RA_POS;
 776
 777         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 778
 779         if (is_agg)
 780                 iwl_rx_reply_tx_agg(priv, tx_resp);
 781
 782         if (tx_resp->frame_count == 1) {
 783                 __skb_queue_head_init(&skbs);
 784                 /*we can free until ssn % q.n_bd not inclusive */
 785                 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
 786                                   ssn, status, &skbs);
 787                 freed = 0;
 788                 while (!skb_queue_empty(&skbs)) {
 789                         skb = __skb_dequeue(&skbs);
 790                         hdr = (struct ieee80211_hdr *)skb->data;
 791
 792                         if (!ieee80211_is_data_qos(hdr->frame_control))
 793                                 priv->last_seq_ctl = tx_resp->seq_ctl;
 794
 795                         info = IEEE80211_SKB_CB(skb);
 796                         ctx = info->driver_data[0];
 797                         kmem_cache_free(priv->tx_cmd_pool,
 798                                         (info->driver_data[1]));
 799
 800                         memset(&info->status, 0, sizeof(info->status));
 801
 802                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
 803                             iwl_is_associated_ctx(ctx) && ctx->vif &&
 804                             ctx->vif->type == NL80211_IFTYPE_STATION) {
 805                                 ctx->last_tx_rejected = true;
 806                                 iwl_trans_stop_queue(trans(priv), txq_id);
 807
 808                                 IWL_DEBUG_TX_REPLY(priv,
 809                                            "TXQ %d status %s (0x%08x) "
 810                                            "rate_n_flags 0x%x retries %d\n",
 811                                            txq_id,
 812                                            iwl_get_tx_fail_reason(status),
 813                                            status,
 814                                            le32_to_cpu(tx_resp->rate_n_flags),
 815                                            tx_resp->failure_frame);
 816
 817                                 IWL_DEBUG_TX_REPLY(priv,
 818                                            "FrameCnt = %d, idx=%d\n",
 819                                            tx_resp->frame_count, cmd_index);
 820                         }
 821
 822                         /* check if BAR is needed */
 823                         if (is_agg && !iwl_is_tx_success(status))
 824                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 825                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
 826                                      tx_resp, is_agg);
 827                         if (!is_agg)
 828                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
 829
 830                         ieee80211_tx_status_irqsafe(priv->hw, skb);
 831
 832                         freed++;
 833                 }
 834
 835                 WARN_ON(!is_agg && freed != 1);
 836         }
 837
 838         iwl_check_abort_status(priv, tx_resp->frame_count, status);
 839         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 840         return 0;
 841 }
 842
 843 /**
 844  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
 845  *
 846  * Handles block-acknowledge notification from device, which reports success
 847  * of frames sent via aggregation.
 848  */
 849 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 850                                    struct iwl_rx_mem_buffer *rxb,
 851                                    struct iwl_device_cmd *cmd)
 852 {
 853         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 854         struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
 855         struct iwl_ht_agg *agg;
 856         struct sk_buff_head reclaimed_skbs;
 857         struct ieee80211_tx_info *info;
 858         struct ieee80211_hdr *hdr;
 859         struct sk_buff *skb;
 860         unsigned long flags;
 861         int sta_id;
 862         int tid;
 863         int freed;
 864
 865         /* "flow" corresponds to Tx queue */
 866         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
 867
 868         /* "ssn" is start of block-ack Tx window, corresponds to index
 869          * (in Tx queue's circular buffer) of first TFD/frame in window */
 870         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
 871
 872         if (scd_flow >= hw_params(priv).max_txq_num) {
 873                 IWL_ERR(priv,
 874                         "BUG_ON scd_flow is bigger than number of queues\n");
 875                 return 0;
 876         }
 877
 878         sta_id = ba_resp->sta_id;
 879         tid = ba_resp->tid;
 880         agg = &priv->shrd->tid_data[sta_id][tid].agg;
 881
 882         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 883
 884         if (unlikely(agg->txq_id != scd_flow)) {
 885                 /*
 886                  * FIXME: this is a uCode bug which need to be addressed,
 887                  * log the information and return for now!
 888                  * since it is possible happen very often and in order
 889                  * not to fill the syslog, don't enable the logging by default
 890                  */
 891                 IWL_DEBUG_TX_REPLY(priv,
 892                         "BA scd_flow %d does not match txq_id %d\n",
 893                         scd_flow, agg->txq_id);
 894                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 895                 return 0;
 896         }
 897
 898         if (unlikely(!agg->wait_for_ba)) {
 899                 if (unlikely(ba_resp->bitmap))
 900                         IWL_ERR(priv, "Received BA when not expected\n");
 901                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 902                 return 0;
 903         }
 904
 905         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
 906                            "sta_id = %d\n",
 907                            agg->wait_for_ba,
 908                            (u8 *) &ba_resp->sta_addr_lo32,
 909                            ba_resp->sta_id);
 910         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
 911                            "scd_flow = %d, scd_ssn = %d\n",
 912                            ba_resp->tid,
 913                            ba_resp->seq_ctl,
 914                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
 915                            ba_resp->scd_flow,
 916                            ba_resp->scd_ssn);
 917
 918         /* Mark that the expected block-ack response arrived */
 919         agg->wait_for_ba = false;
 920
 921         /* Sanity check values reported by uCode */
 922         if (ba_resp->txed_2_done > ba_resp->txed) {
 923                 IWL_DEBUG_TX_REPLY(priv,
 924                         "bogus sent(%d) and ack(%d) count\n",
 925                         ba_resp->txed, ba_resp->txed_2_done);
 926                 /*
 927                  * set txed_2_done = txed,
 928                  * so it won't impact rate scale
 929                  */
 930                 ba_resp->txed = ba_resp->txed_2_done;
 931         }
 932         IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
 933                         ba_resp->txed, ba_resp->txed_2_done);
 934
 935         __skb_queue_head_init(&reclaimed_skbs);
 936
 937         /* Release all TFDs before the SSN, i.e. all TFDs in front of
 938          * block-ack window (we assume that they've been successfully
 939          * transmitted ... if not, it's too late anyway). */
 940         iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
 941                           0, &reclaimed_skbs);
 942         freed = 0;
 943         while (!skb_queue_empty(&reclaimed_skbs)) {
 944
 945                 skb = __skb_dequeue(&reclaimed_skbs);
 946                 hdr = (struct ieee80211_hdr *)skb->data;
 947
 948                 if (ieee80211_is_data_qos(hdr->frame_control))
 949                         freed++;
 950                 else
 951                         WARN_ON_ONCE(1);
 952
 953                 info = IEEE80211_SKB_CB(skb);
 954                 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
 955
 956                 if (freed == 1) {
 957                         /* this is the first skb we deliver in this batch */
 958                         /* put the rate scaling data there */
 959                         info = IEEE80211_SKB_CB(skb);
 960                         memset(&info->status, 0, sizeof(info->status));
 961                         info->flags |= IEEE80211_TX_STAT_ACK;
 962                         info->flags |= IEEE80211_TX_STAT_AMPDU;
 963                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
 964                         info->status.ampdu_len = ba_resp->txed;
 965                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
 966                                                     info);
 967                 }
 968
 969                 ieee80211_tx_status_irqsafe(priv->hw, skb);
 970         }
 971
 972         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 973         return 0;
 974 }