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_TESTMODE
 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         } else if (ieee80211_is_back_req(fc))
 165                 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
 166
 167         /**
 168          * If the current TX rate stored in mac80211 has the MCS bit set, it's
 169          * not really a TX rate.  Thus, we use the lowest supported rate for
 170          * this band.  Also use the lowest supported rate if the stored rate
 171          * index is invalid.
 172          */
 173         rate_idx = info->control.rates[0].idx;
 174         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
 175                         (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
 176                 rate_idx = rate_lowest_index(&priv->bands[info->band],
 177                                 info->control.sta);
 178         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 179         if (info->band == IEEE80211_BAND_5GHZ)
 180                 rate_idx += IWL_FIRST_OFDM_RATE;
 181         /* Get PLCP rate for tx_cmd->rate_n_flags */
 182         rate_plcp = iwl_rates[rate_idx].plcp;
 183         /* Zero out flags for this packet */
 184         rate_flags = 0;
 185
 186         /* Set CCK flag as needed */
 187         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 188                 rate_flags |= RATE_MCS_CCK_MSK;
 189
 190         /* Set up antennas */
 191          if (priv->cfg->bt_params &&
 192              priv->cfg->bt_params->advanced_bt_coexist &&
 193              priv->bt_full_concurrent) {
 194                 /* operated as 1x1 in full concurrency mode */
 195                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 196                                 first_antenna(hw_params(priv).valid_tx_ant));
 197         } else
 198                 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 199                                                 hw_params(priv).valid_tx_ant);
 200         rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 201
 202         /* Set the rate in the TX cmd */
 203         tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
 204 }
 205
 206 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
 207                                       struct ieee80211_tx_info *info,
 208                                       struct iwl_tx_cmd *tx_cmd,
 209                                       struct sk_buff *skb_frag,
 210                                       int sta_id)
 211 {
 212         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 213
 214         switch (keyconf->cipher) {
 215         case WLAN_CIPHER_SUITE_CCMP:
 216                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 217                 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
 218                 if (info->flags & IEEE80211_TX_CTL_AMPDU)
 219                         tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
 220                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 221                 break;
 222
 223         case WLAN_CIPHER_SUITE_TKIP:
 224                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 225                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 226                 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
 227                 break;
 228
 229         case WLAN_CIPHER_SUITE_WEP104:
 230                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 231                 /* fall through */
 232         case WLAN_CIPHER_SUITE_WEP40:
 233                 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
 234                         (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
 235
 236                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 237
 238                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 239                              "with key %d\n", keyconf->keyidx);
 240                 break;
 241
 242         default:
 243                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
 244                 break;
 245         }
 246 }
 247
 248 /*
 249  * start REPLY_TX command process
 250  */
 251 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 252 {
 253         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 254         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 255         struct iwl_station_priv *sta_priv = NULL;
 256         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 257         struct iwl_device_cmd *dev_cmd = NULL;
 258         struct iwl_tx_cmd *tx_cmd;
 259
 260         __le16 fc;
 261         u8 hdr_len;
 262         u16 len;
 263         u8 sta_id;
 264         unsigned long flags;
 265         bool is_agg = false;
 266
 267         if (info->control.vif)
 268                 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
 269
 270         spin_lock_irqsave(&priv->shrd->lock, flags);
 271         if (iwl_is_rfkill(priv->shrd)) {
 272                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 273                 goto drop_unlock_priv;
 274         }
 275
 276         fc = hdr->frame_control;
 277
 278 #ifdef CONFIG_IWLWIFI_DEBUG
 279         if (ieee80211_is_auth(fc))
 280                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 281         else if (ieee80211_is_assoc_req(fc))
 282                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 283         else if (ieee80211_is_reassoc_req(fc))
 284                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 285 #endif
 286
 287         if (unlikely(ieee80211_is_probe_resp(fc))) {
 288                 struct iwl_wipan_noa_data *noa_data =
 289                         rcu_dereference(priv->noa_data);
 290
 291                 if (noa_data &&
 292                     pskb_expand_head(skb, 0, noa_data->length,
 293                                      GFP_ATOMIC) == 0) {
 294                         memcpy(skb_put(skb, noa_data->length),
 295                                noa_data->data, noa_data->length);
 296                         hdr = (struct ieee80211_hdr *)skb->data;
 297                 }
 298         }
 299
 300         hdr_len = ieee80211_hdrlen(fc);
 301
 302         /* For management frames use broadcast id to do not break aggregation */
 303         if (!ieee80211_is_data(fc))
 304                 sta_id = ctx->bcast_sta_id;
 305         else {
 306                 /* Find index into station table for destination station */
 307                 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
 308                 if (sta_id == IWL_INVALID_STATION) {
 309                         IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 310                                        hdr->addr1);
 311                         goto drop_unlock_priv;
 312                 }
 313         }
 314
 315         IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
 316
 317         if (info->control.sta)
 318                 sta_priv = (void *)info->control.sta->drv_priv;
 319
 320         if (sta_priv && sta_priv->asleep &&
 321             (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
 322                 /*
 323                  * This sends an asynchronous command to the device,
 324                  * but we can rely on it being processed before the
 325                  * next frame is processed -- and the next frame to
 326                  * this station is the one that will consume this
 327                  * counter.
 328                  * For now set the counter to just 1 since we do not
 329                  * support uAPSD yet.
 330                  */
 331                 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
 332         }
 333
 334         if (info->flags & IEEE80211_TX_CTL_AMPDU)
 335                 is_agg = true;
 336
 337         /* irqs already disabled/saved above when locking priv->shrd->lock */
 338         spin_lock(&priv->shrd->sta_lock);
 339
 340         dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
 341
 342         if (unlikely(!dev_cmd))
 343                 goto drop_unlock_sta;
 344
 345         memset(dev_cmd, 0, sizeof(*dev_cmd));
 346         tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 347
 348         /* Total # bytes to be transmitted */
 349         len = (u16)skb->len;
 350         tx_cmd->len = cpu_to_le16(len);
 351
 352         if (info->control.hw_key)
 353                 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
 354
 355         /* TODO need this for burst mode later on */
 356         iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
 357         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 358
 359         iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
 360
 361         iwl_update_stats(priv, true, fc, len);
 362
 363         memset(&info->status, 0, sizeof(info->status));
 364
 365         info->driver_data[0] = ctx;
 366         info->driver_data[1] = dev_cmd;
 367
 368         if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
 369                 goto drop_unlock_sta;
 370
 371         spin_unlock(&priv->shrd->sta_lock);
 372         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 373
 374         /*
 375          * Avoid atomic ops if it isn't an associated client.
 376          * Also, if this is a packet for aggregation, don't
 377          * increase the counter because the ucode will stop
 378          * aggregation queues when their respective station
 379          * goes to sleep.
 380          */
 381         if (sta_priv && sta_priv->client && !is_agg)
 382                 atomic_inc(&sta_priv->pending_frames);
 383
 384         return 0;
 385
 386 drop_unlock_sta:
 387         if (dev_cmd)
 388                 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
 389         spin_unlock(&priv->shrd->sta_lock);
 390 drop_unlock_priv:
 391         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 392         return -1;
 393 }
 394
 395 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
 396                         struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 397 {
 398         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 399         int sta_id;
 400         int ret;
 401
 402         IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
 403                      sta->addr, tid);
 404
 405         sta_id = iwl_sta_id(sta);
 406         if (sta_id == IWL_INVALID_STATION) {
 407                 IWL_ERR(priv, "Start AGG on invalid station\n");
 408                 return -ENXIO;
 409         }
 410         if (unlikely(tid >= IWL_MAX_TID_COUNT))
 411                 return -EINVAL;
 412
 413         if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
 414                 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
 415                 return -ENXIO;
 416         }
 417
 418         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
 419         if (ret)
 420                 return ret;
 421
 422         ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
 423                                      tid, ssn);
 424
 425         return ret;
 426 }
 427
 428 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
 429                        struct ieee80211_sta *sta, u16 tid)
 430 {
 431         int sta_id;
 432         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 433
 434         sta_id = iwl_sta_id(sta);
 435
 436         if (sta_id == IWL_INVALID_STATION) {
 437                 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
 438                 return -ENXIO;
 439         }
 440
 441         return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid,
 442                                         sta_id, tid);
 443 }
 444
 445 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
 446                                      struct iwl_rxon_context *ctx,
 447                                      const u8 *addr1)
 448 {
 449         struct ieee80211_sta *sta;
 450         struct iwl_station_priv *sta_priv;
 451
 452         rcu_read_lock();
 453         sta = ieee80211_find_sta(ctx->vif, addr1);
 454         if (sta) {
 455                 sta_priv = (void *)sta->drv_priv;
 456                 /* avoid atomic ops if this isn't a client */
 457                 if (sta_priv->client &&
 458                     atomic_dec_return(&sta_priv->pending_frames) == 0)
 459                         ieee80211_sta_block_awake(priv->hw, sta, false);
 460         }
 461         rcu_read_unlock();
 462 }
 463
 464 /**
 465  * translate ucode response to mac80211 tx status control values
 466  */
 467 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 468                                   struct ieee80211_tx_info *info)
 469 {
 470         struct ieee80211_tx_rate *r = &info->control.rates[0];
 471
 472         info->antenna_sel_tx =
 473                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 474         if (rate_n_flags & RATE_MCS_HT_MSK)
 475                 r->flags |= IEEE80211_TX_RC_MCS;
 476         if (rate_n_flags & RATE_MCS_GF_MSK)
 477                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 478         if (rate_n_flags & RATE_MCS_HT40_MSK)
 479                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 480         if (rate_n_flags & RATE_MCS_DUP_MSK)
 481                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 482         if (rate_n_flags & RATE_MCS_SGI_MSK)
 483                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 484         r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 485 }
 486
 487 #ifdef CONFIG_IWLWIFI_DEBUG
 488 const char *iwl_get_tx_fail_reason(u32 status)
 489 {
 490 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
 491 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
 492
 493         switch (status & TX_STATUS_MSK) {
 494         case TX_STATUS_SUCCESS:
 495                 return "SUCCESS";
 496         TX_STATUS_POSTPONE(DELAY);
 497         TX_STATUS_POSTPONE(FEW_BYTES);
 498         TX_STATUS_POSTPONE(BT_PRIO);
 499         TX_STATUS_POSTPONE(QUIET_PERIOD);
 500         TX_STATUS_POSTPONE(CALC_TTAK);
 501         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
 502         TX_STATUS_FAIL(SHORT_LIMIT);
 503         TX_STATUS_FAIL(LONG_LIMIT);
 504         TX_STATUS_FAIL(FIFO_UNDERRUN);
 505         TX_STATUS_FAIL(DRAIN_FLOW);
 506         TX_STATUS_FAIL(RFKILL_FLUSH);
 507         TX_STATUS_FAIL(LIFE_EXPIRE);
 508         TX_STATUS_FAIL(DEST_PS);
 509         TX_STATUS_FAIL(HOST_ABORTED);
 510         TX_STATUS_FAIL(BT_RETRY);
 511         TX_STATUS_FAIL(STA_INVALID);
 512         TX_STATUS_FAIL(FRAG_DROPPED);
 513         TX_STATUS_FAIL(TID_DISABLE);
 514         TX_STATUS_FAIL(FIFO_FLUSHED);
 515         TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
 516         TX_STATUS_FAIL(PASSIVE_NO_RX);
 517         TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
 518         }
 519
 520         return "UNKNOWN";
 521
 522 #undef TX_STATUS_FAIL
 523 #undef TX_STATUS_POSTPONE
 524 }
 525 #endif /* CONFIG_IWLWIFI_DEBUG */
 526
 527 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 528 {
 529         status &= AGG_TX_STATUS_MSK;
 530
 531         switch (status) {
 532         case AGG_TX_STATE_UNDERRUN_MSK:
 533                 priv->reply_agg_tx_stats.underrun++;
 534                 break;
 535         case AGG_TX_STATE_BT_PRIO_MSK:
 536                 priv->reply_agg_tx_stats.bt_prio++;
 537                 break;
 538         case AGG_TX_STATE_FEW_BYTES_MSK:
 539                 priv->reply_agg_tx_stats.few_bytes++;
 540                 break;
 541         case AGG_TX_STATE_ABORT_MSK:
 542                 priv->reply_agg_tx_stats.abort++;
 543                 break;
 544         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 545                 priv->reply_agg_tx_stats.last_sent_ttl++;
 546                 break;
 547         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 548                 priv->reply_agg_tx_stats.last_sent_try++;
 549                 break;
 550         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 551                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 552                 break;
 553         case AGG_TX_STATE_SCD_QUERY_MSK:
 554                 priv->reply_agg_tx_stats.scd_query++;
 555                 break;
 556         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 557                 priv->reply_agg_tx_stats.bad_crc32++;
 558                 break;
 559         case AGG_TX_STATE_RESPONSE_MSK:
 560                 priv->reply_agg_tx_stats.response++;
 561                 break;
 562         case AGG_TX_STATE_DUMP_TX_MSK:
 563                 priv->reply_agg_tx_stats.dump_tx++;
 564                 break;
 565         case AGG_TX_STATE_DELAY_TX_MSK:
 566                 priv->reply_agg_tx_stats.delay_tx++;
 567                 break;
 568         default:
 569                 priv->reply_agg_tx_stats.unknown++;
 570                 break;
 571         }
 572 }
 573
 574 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
 575                                 struct iwlagn_tx_resp *tx_resp)
 576 {
 577         struct agg_tx_status *frame_status = &tx_resp->status;
 578         int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 579                 IWLAGN_TX_RES_TID_POS;
 580         int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 581                 IWLAGN_TX_RES_RA_POS;
 582         struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
 583         u32 status = le16_to_cpu(tx_resp->status.status);
 584         int i;
 585
 586         if (agg->wait_for_ba)
 587                 IWL_DEBUG_TX_REPLY(priv,
 588                         "got tx response w/o block-ack\n");
 589
 590         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 591         agg->wait_for_ba = (tx_resp->frame_count > 1);
 592
 593         /*
 594          * If the BT kill count is non-zero, we'll get this
 595          * notification again.
 596          */
 597         if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 598             priv->cfg->bt_params &&
 599             priv->cfg->bt_params->advanced_bt_coexist) {
 600                 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
 601         }
 602
 603         if (tx_resp->frame_count == 1)
 604                 return;
 605
 606         /* Construct bit-map of pending frames within Tx window */
 607         for (i = 0; i < tx_resp->frame_count; i++) {
 608                 u16 fstatus = le16_to_cpu(frame_status[i].status);
 609
 610                 if (status & AGG_TX_STATUS_MSK)
 611                         iwlagn_count_agg_tx_err_status(priv, fstatus);
 612
 613                 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 614                               AGG_TX_STATE_ABORT_MSK))
 615                         continue;
 616
 617                 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
 618                                    "try-count (0x%08x)\n",
 619                                    iwl_get_agg_tx_fail_reason(fstatus),
 620                                    fstatus & AGG_TX_STATUS_MSK,
 621                                    fstatus & AGG_TX_TRY_MSK);
 622         }
 623 }
 624
 625 #ifdef CONFIG_IWLWIFI_DEBUG
 626 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 627
 628 const char *iwl_get_agg_tx_fail_reason(u16 status)
 629 {
 630         status &= AGG_TX_STATUS_MSK;
 631         switch (status) {
 632         case AGG_TX_STATE_TRANSMITTED:
 633                 return "SUCCESS";
 634                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 635                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 636                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 637                 AGG_TX_STATE_FAIL(ABORT_MSK);
 638                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 639                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 640                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 641                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 642                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 643                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 644                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 645                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
 646         }
 647
 648         return "UNKNOWN";
 649 }
 650 #endif /* CONFIG_IWLWIFI_DEBUG */
 651
 652 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
 653 {
 654         return le32_to_cpup((__le32 *)&tx_resp->status +
 655                             tx_resp->frame_count) & MAX_SN;
 656 }
 657
 658 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
 659 {
 660         status &= TX_STATUS_MSK;
 661
 662         switch (status) {
 663         case TX_STATUS_POSTPONE_DELAY:
 664                 priv->reply_tx_stats.pp_delay++;
 665                 break;
 666         case TX_STATUS_POSTPONE_FEW_BYTES:
 667                 priv->reply_tx_stats.pp_few_bytes++;
 668                 break;
 669         case TX_STATUS_POSTPONE_BT_PRIO:
 670                 priv->reply_tx_stats.pp_bt_prio++;
 671                 break;
 672         case TX_STATUS_POSTPONE_QUIET_PERIOD:
 673                 priv->reply_tx_stats.pp_quiet_period++;
 674                 break;
 675         case TX_STATUS_POSTPONE_CALC_TTAK:
 676                 priv->reply_tx_stats.pp_calc_ttak++;
 677                 break;
 678         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
 679                 priv->reply_tx_stats.int_crossed_retry++;
 680                 break;
 681         case TX_STATUS_FAIL_SHORT_LIMIT:
 682                 priv->reply_tx_stats.short_limit++;
 683                 break;
 684         case TX_STATUS_FAIL_LONG_LIMIT:
 685                 priv->reply_tx_stats.long_limit++;
 686                 break;
 687         case TX_STATUS_FAIL_FIFO_UNDERRUN:
 688                 priv->reply_tx_stats.fifo_underrun++;
 689                 break;
 690         case TX_STATUS_FAIL_DRAIN_FLOW:
 691                 priv->reply_tx_stats.drain_flow++;
 692                 break;
 693         case TX_STATUS_FAIL_RFKILL_FLUSH:
 694                 priv->reply_tx_stats.rfkill_flush++;
 695                 break;
 696         case TX_STATUS_FAIL_LIFE_EXPIRE:
 697                 priv->reply_tx_stats.life_expire++;
 698                 break;
 699         case TX_STATUS_FAIL_DEST_PS:
 700                 priv->reply_tx_stats.dest_ps++;
 701                 break;
 702         case TX_STATUS_FAIL_HOST_ABORTED:
 703                 priv->reply_tx_stats.host_abort++;
 704                 break;
 705         case TX_STATUS_FAIL_BT_RETRY:
 706                 priv->reply_tx_stats.bt_retry++;
 707                 break;
 708         case TX_STATUS_FAIL_STA_INVALID:
 709                 priv->reply_tx_stats.sta_invalid++;
 710                 break;
 711         case TX_STATUS_FAIL_FRAG_DROPPED:
 712                 priv->reply_tx_stats.frag_drop++;
 713                 break;
 714         case TX_STATUS_FAIL_TID_DISABLE:
 715                 priv->reply_tx_stats.tid_disable++;
 716                 break;
 717         case TX_STATUS_FAIL_FIFO_FLUSHED:
 718                 priv->reply_tx_stats.fifo_flush++;
 719                 break;
 720         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
 721                 priv->reply_tx_stats.insuff_cf_poll++;
 722                 break;
 723         case TX_STATUS_FAIL_PASSIVE_NO_RX:
 724                 priv->reply_tx_stats.fail_hw_drop++;
 725                 break;
 726         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
 727                 priv->reply_tx_stats.sta_color_mismatch++;
 728                 break;
 729         default:
 730                 priv->reply_tx_stats.unknown++;
 731                 break;
 732         }
 733 }
 734
 735 static void iwlagn_set_tx_status(struct iwl_priv *priv,
 736                                  struct ieee80211_tx_info *info,
 737                                  struct iwlagn_tx_resp *tx_resp,
 738                                  bool is_agg)
 739 {
 740         u16  status = le16_to_cpu(tx_resp->status.status);
 741
 742         info->status.rates[0].count = tx_resp->failure_frame + 1;
 743         if (is_agg)
 744                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 745         info->flags |= iwl_tx_status_to_mac80211(status);
 746         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
 747                                     info);
 748         if (!iwl_is_tx_success(status))
 749                 iwlagn_count_tx_err_status(priv, status);
 750 }
 751
 752 static void iwl_check_abort_status(struct iwl_priv *priv,
 753                             u8 frame_count, u32 status)
 754 {
 755         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
 756                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
 757                 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 758                         queue_work(priv->shrd->workqueue, &priv->tx_flush);
 759         }
 760 }
 761
 762 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 763                                struct iwl_device_cmd *cmd)
 764 {
 765         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 766         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 767         int txq_id = SEQ_TO_QUEUE(sequence);
 768         int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
 769         struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 770         struct ieee80211_hdr *hdr;
 771         u32 status = le16_to_cpu(tx_resp->status.status);
 772         u32 ssn = iwlagn_get_scd_ssn(tx_resp);
 773         int tid;
 774         int sta_id;
 775         int freed;
 776         struct ieee80211_tx_info *info;
 777         unsigned long flags;
 778         struct sk_buff_head skbs;
 779         struct sk_buff *skb;
 780         struct iwl_rxon_context *ctx;
 781         bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
 782
 783         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 784                 IWLAGN_TX_RES_TID_POS;
 785         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 786                 IWLAGN_TX_RES_RA_POS;
 787
 788         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 789
 790         if (is_agg)
 791                 iwl_rx_reply_tx_agg(priv, tx_resp);
 792
 793         if (tx_resp->frame_count == 1) {
 794                 IWL_DEBUG_TX_REPLY(priv, "Q %d, ssn %d", txq_id, ssn);
 795                 __skb_queue_head_init(&skbs);
 796                 /*we can free until ssn % q.n_bd not inclusive */
 797                 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
 798                                   ssn, status, &skbs);
 799                 freed = 0;
 800                 while (!skb_queue_empty(&skbs)) {
 801                         skb = __skb_dequeue(&skbs);
 802                         hdr = (struct ieee80211_hdr *)skb->data;
 803
 804                         if (!ieee80211_is_data_qos(hdr->frame_control))
 805                                 priv->last_seq_ctl = tx_resp->seq_ctl;
 806
 807                         info = IEEE80211_SKB_CB(skb);
 808                         ctx = info->driver_data[0];
 809                         kmem_cache_free(priv->tx_cmd_pool,
 810                                         (info->driver_data[1]));
 811
 812                         memset(&info->status, 0, sizeof(info->status));
 813
 814                         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
 815                             iwl_is_associated_ctx(ctx) && ctx->vif &&
 816                             ctx->vif->type == NL80211_IFTYPE_STATION) {
 817                                 ctx->last_tx_rejected = true;
 818                                 iwl_trans_stop_queue(trans(priv), txq_id,
 819                                         "Tx on passive channel");
 820
 821                                 IWL_DEBUG_TX_REPLY(priv,
 822                                            "TXQ %d status %s (0x%08x) "
 823                                            "rate_n_flags 0x%x retries %d\n",
 824                                            txq_id,
 825                                            iwl_get_tx_fail_reason(status),
 826                                            status,
 827                                            le32_to_cpu(tx_resp->rate_n_flags),
 828                                            tx_resp->failure_frame);
 829
 830                                 IWL_DEBUG_TX_REPLY(priv,
 831                                            "FrameCnt = %d, idx=%d\n",
 832                                            tx_resp->frame_count, cmd_index);
 833                         }
 834
 835                         /* check if BAR is needed */
 836                         if (is_agg && !iwl_is_tx_success(status))
 837                                 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 838                         iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
 839                                      tx_resp, is_agg);
 840                         if (!is_agg)
 841                                 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
 842
 843                         ieee80211_tx_status_irqsafe(priv->hw, skb);
 844
 845                         freed++;
 846                 }
 847
 848                 WARN_ON(!is_agg && freed != 1);
 849         }
 850
 851         iwl_check_abort_status(priv, tx_resp->frame_count, status);
 852         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 853         return 0;
 854 }
 855
 856 /**
 857  * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
 858  *
 859  * Handles block-acknowledge notification from device, which reports success
 860  * of frames sent via aggregation.
 861  */
 862 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 863                                    struct iwl_rx_mem_buffer *rxb,
 864                                    struct iwl_device_cmd *cmd)
 865 {
 866         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 867         struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
 868         struct iwl_ht_agg *agg;
 869         struct sk_buff_head reclaimed_skbs;
 870         struct ieee80211_tx_info *info;
 871         struct ieee80211_hdr *hdr;
 872         struct sk_buff *skb;
 873         unsigned long flags;
 874         int sta_id;
 875         int tid;
 876         int freed;
 877
 878         /* "flow" corresponds to Tx queue */
 879         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
 880
 881         /* "ssn" is start of block-ack Tx window, corresponds to index
 882          * (in Tx queue's circular buffer) of first TFD/frame in window */
 883         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
 884
 885         if (scd_flow >= hw_params(priv).max_txq_num) {
 886                 IWL_ERR(priv,
 887                         "BUG_ON scd_flow is bigger than number of queues\n");
 888                 return 0;
 889         }
 890
 891         sta_id = ba_resp->sta_id;
 892         tid = ba_resp->tid;
 893         agg = &priv->shrd->tid_data[sta_id][tid].agg;
 894
 895         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
 896
 897         if (unlikely(agg->txq_id != scd_flow)) {
 898                 /*
 899                  * FIXME: this is a uCode bug which need to be addressed,
 900                  * log the information and return for now!
 901                  * since it is possible happen very often and in order
 902                  * not to fill the syslog, don't enable the logging by default
 903                  */
 904                 IWL_DEBUG_TX_REPLY(priv,
 905                         "BA scd_flow %d does not match txq_id %d\n",
 906                         scd_flow, agg->txq_id);
 907                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 908                 return 0;
 909         }
 910
 911         if (unlikely(!agg->wait_for_ba)) {
 912                 if (unlikely(ba_resp->bitmap))
 913                         IWL_ERR(priv, "Received BA when not expected\n");
 914                 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 915                 return 0;
 916         }
 917
 918         IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
 919                            "sta_id = %d\n",
 920                            agg->wait_for_ba,
 921                            (u8 *) &ba_resp->sta_addr_lo32,
 922                            ba_resp->sta_id);
 923         IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
 924                            "scd_flow = %d, scd_ssn = %d\n",
 925                            ba_resp->tid, ba_resp->seq_ctl,
 926                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
 927                            scd_flow, ba_resp_scd_ssn);
 928
 929         /* Mark that the expected block-ack response arrived */
 930         agg->wait_for_ba = false;
 931
 932         /* Sanity check values reported by uCode */
 933         if (ba_resp->txed_2_done > ba_resp->txed) {
 934                 IWL_DEBUG_TX_REPLY(priv,
 935                         "bogus sent(%d) and ack(%d) count\n",
 936                         ba_resp->txed, ba_resp->txed_2_done);
 937                 /*
 938                  * set txed_2_done = txed,
 939                  * so it won't impact rate scale
 940                  */
 941                 ba_resp->txed = ba_resp->txed_2_done;
 942         }
 943         IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
 944                         ba_resp->txed, ba_resp->txed_2_done);
 945
 946         __skb_queue_head_init(&reclaimed_skbs);
 947
 948         /* Release all TFDs before the SSN, i.e. all TFDs in front of
 949          * block-ack window (we assume that they've been successfully
 950          * transmitted ... if not, it's too late anyway). */
 951         iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
 952                           0, &reclaimed_skbs);
 953         freed = 0;
 954         while (!skb_queue_empty(&reclaimed_skbs)) {
 955
 956                 skb = __skb_dequeue(&reclaimed_skbs);
 957                 hdr = (struct ieee80211_hdr *)skb->data;
 958
 959                 if (ieee80211_is_data_qos(hdr->frame_control))
 960                         freed++;
 961                 else
 962                         WARN_ON_ONCE(1);
 963
 964                 info = IEEE80211_SKB_CB(skb);
 965                 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
 966
 967                 if (freed == 1) {
 968                         /* this is the first skb we deliver in this batch */
 969                         /* put the rate scaling data there */
 970                         info = IEEE80211_SKB_CB(skb);
 971                         memset(&info->status, 0, sizeof(info->status));
 972                         info->flags |= IEEE80211_TX_STAT_ACK;
 973                         info->flags |= IEEE80211_TX_STAT_AMPDU;
 974                         info->status.ampdu_ack_len = ba_resp->txed_2_done;
 975                         info->status.ampdu_len = ba_resp->txed;
 976                         iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
 977                                                     info);
 978                 }
 979
 980                 ieee80211_tx_status_irqsafe(priv->hw, skb);
 981         }
 982
 983         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
 984         return 0;
 985 }