drivers/net/wireless/iwlwifi/iwl-agn-lib.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 #include <linux/etherdevice.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/sched.h>
  34
  35 #include "iwl-dev.h"
  36 #include "iwl-core.h"
  37 #include "iwl-io.h"
  38 #include "iwl-helpers.h"
  39 #include "iwl-agn-hw.h"
  40 #include "iwl-agn.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-trans.h"
  43
  44 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
  45 {
  46         return le32_to_cpup((__le32 *)&tx_resp->status +
  47                             tx_resp->frame_count) & MAX_SN;
  48 }
  49
  50 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
  51 {
  52         status &= TX_STATUS_MSK;
  53
  54         switch (status) {
  55         case TX_STATUS_POSTPONE_DELAY:
  56                 priv->reply_tx_stats.pp_delay++;
  57                 break;
  58         case TX_STATUS_POSTPONE_FEW_BYTES:
  59                 priv->reply_tx_stats.pp_few_bytes++;
  60                 break;
  61         case TX_STATUS_POSTPONE_BT_PRIO:
  62                 priv->reply_tx_stats.pp_bt_prio++;
  63                 break;
  64         case TX_STATUS_POSTPONE_QUIET_PERIOD:
  65                 priv->reply_tx_stats.pp_quiet_period++;
  66                 break;
  67         case TX_STATUS_POSTPONE_CALC_TTAK:
  68                 priv->reply_tx_stats.pp_calc_ttak++;
  69                 break;
  70         case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
  71                 priv->reply_tx_stats.int_crossed_retry++;
  72                 break;
  73         case TX_STATUS_FAIL_SHORT_LIMIT:
  74                 priv->reply_tx_stats.short_limit++;
  75                 break;
  76         case TX_STATUS_FAIL_LONG_LIMIT:
  77                 priv->reply_tx_stats.long_limit++;
  78                 break;
  79         case TX_STATUS_FAIL_FIFO_UNDERRUN:
  80                 priv->reply_tx_stats.fifo_underrun++;
  81                 break;
  82         case TX_STATUS_FAIL_DRAIN_FLOW:
  83                 priv->reply_tx_stats.drain_flow++;
  84                 break;
  85         case TX_STATUS_FAIL_RFKILL_FLUSH:
  86                 priv->reply_tx_stats.rfkill_flush++;
  87                 break;
  88         case TX_STATUS_FAIL_LIFE_EXPIRE:
  89                 priv->reply_tx_stats.life_expire++;
  90                 break;
  91         case TX_STATUS_FAIL_DEST_PS:
  92                 priv->reply_tx_stats.dest_ps++;
  93                 break;
  94         case TX_STATUS_FAIL_HOST_ABORTED:
  95                 priv->reply_tx_stats.host_abort++;
  96                 break;
  97         case TX_STATUS_FAIL_BT_RETRY:
  98                 priv->reply_tx_stats.bt_retry++;
  99                 break;
 100         case TX_STATUS_FAIL_STA_INVALID:
 101                 priv->reply_tx_stats.sta_invalid++;
 102                 break;
 103         case TX_STATUS_FAIL_FRAG_DROPPED:
 104                 priv->reply_tx_stats.frag_drop++;
 105                 break;
 106         case TX_STATUS_FAIL_TID_DISABLE:
 107                 priv->reply_tx_stats.tid_disable++;
 108                 break;
 109         case TX_STATUS_FAIL_FIFO_FLUSHED:
 110                 priv->reply_tx_stats.fifo_flush++;
 111                 break;
 112         case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
 113                 priv->reply_tx_stats.insuff_cf_poll++;
 114                 break;
 115         case TX_STATUS_FAIL_PASSIVE_NO_RX:
 116                 priv->reply_tx_stats.fail_hw_drop++;
 117                 break;
 118         case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
 119                 priv->reply_tx_stats.sta_color_mismatch++;
 120                 break;
 121         default:
 122                 priv->reply_tx_stats.unknown++;
 123                 break;
 124         }
 125 }
 126
 127 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
 128 {
 129         status &= AGG_TX_STATUS_MSK;
 130
 131         switch (status) {
 132         case AGG_TX_STATE_UNDERRUN_MSK:
 133                 priv->reply_agg_tx_stats.underrun++;
 134                 break;
 135         case AGG_TX_STATE_BT_PRIO_MSK:
 136                 priv->reply_agg_tx_stats.bt_prio++;
 137                 break;
 138         case AGG_TX_STATE_FEW_BYTES_MSK:
 139                 priv->reply_agg_tx_stats.few_bytes++;
 140                 break;
 141         case AGG_TX_STATE_ABORT_MSK:
 142                 priv->reply_agg_tx_stats.abort++;
 143                 break;
 144         case AGG_TX_STATE_LAST_SENT_TTL_MSK:
 145                 priv->reply_agg_tx_stats.last_sent_ttl++;
 146                 break;
 147         case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
 148                 priv->reply_agg_tx_stats.last_sent_try++;
 149                 break;
 150         case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
 151                 priv->reply_agg_tx_stats.last_sent_bt_kill++;
 152                 break;
 153         case AGG_TX_STATE_SCD_QUERY_MSK:
 154                 priv->reply_agg_tx_stats.scd_query++;
 155                 break;
 156         case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
 157                 priv->reply_agg_tx_stats.bad_crc32++;
 158                 break;
 159         case AGG_TX_STATE_RESPONSE_MSK:
 160                 priv->reply_agg_tx_stats.response++;
 161                 break;
 162         case AGG_TX_STATE_DUMP_TX_MSK:
 163                 priv->reply_agg_tx_stats.dump_tx++;
 164                 break;
 165         case AGG_TX_STATE_DELAY_TX_MSK:
 166                 priv->reply_agg_tx_stats.delay_tx++;
 167                 break;
 168         default:
 169                 priv->reply_agg_tx_stats.unknown++;
 170                 break;
 171         }
 172 }
 173
 174 static void iwlagn_set_tx_status(struct iwl_priv *priv,
 175                                  struct ieee80211_tx_info *info,
 176                                  struct iwl_rxon_context *ctx,
 177                                  struct iwlagn_tx_resp *tx_resp,
 178                                  int txq_id, bool is_agg)
 179 {
 180         u16  status = le16_to_cpu(tx_resp->status.status);
 181
 182         info->status.rates[0].count = tx_resp->failure_frame + 1;
 183         if (is_agg)
 184                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 185         info->flags |= iwl_tx_status_to_mac80211(status);
 186         iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
 187                                     info);
 188         if (!iwl_is_tx_success(status))
 189                 iwlagn_count_tx_err_status(priv, status);
 190
 191         if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
 192             iwl_is_associated_ctx(ctx) && ctx->vif &&
 193             ctx->vif->type == NL80211_IFTYPE_STATION) {
 194                 ctx->last_tx_rejected = true;
 195                 iwl_stop_queue(priv, &priv->txq[txq_id]);
 196         }
 197
 198         IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
 199                            "0x%x retries %d\n",
 200                            txq_id,
 201                            iwl_get_tx_fail_reason(status), status,
 202                            le32_to_cpu(tx_resp->rate_n_flags),
 203                            tx_resp->failure_frame);
 204 }
 205
 206 #ifdef CONFIG_IWLWIFI_DEBUG
 207 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
 208
 209 const char *iwl_get_agg_tx_fail_reason(u16 status)
 210 {
 211         status &= AGG_TX_STATUS_MSK;
 212         switch (status) {
 213         case AGG_TX_STATE_TRANSMITTED:
 214                 return "SUCCESS";
 215                 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
 216                 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
 217                 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
 218                 AGG_TX_STATE_FAIL(ABORT_MSK);
 219                 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
 220                 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
 221                 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
 222                 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
 223                 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
 224                 AGG_TX_STATE_FAIL(RESPONSE_MSK);
 225                 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
 226                 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
 227         }
 228
 229         return "UNKNOWN";
 230 }
 231 #endif /* CONFIG_IWLWIFI_DEBUG */
 232
 233 static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
 234                                       struct iwl_ht_agg *agg,
 235                                       struct iwlagn_tx_resp *tx_resp,
 236                                       int txq_id, u16 start_idx)
 237 {
 238         u16 status;
 239         struct agg_tx_status *frame_status = &tx_resp->status;
 240         struct ieee80211_hdr *hdr = NULL;
 241         int i, sh, idx;
 242         u16 seq;
 243
 244         if (agg->wait_for_ba)
 245                 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
 246
 247         agg->frame_count = tx_resp->frame_count;
 248         agg->start_idx = start_idx;
 249         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
 250         agg->bitmap = 0;
 251
 252         /* # frames attempted by Tx command */
 253         if (agg->frame_count == 1) {
 254                 struct iwl_tx_info *txb;
 255
 256                 /* Only one frame was attempted; no block-ack will arrive */
 257                 idx = start_idx;
 258
 259                 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
 260                                    agg->frame_count, agg->start_idx, idx);
 261                 txb = &priv->txq[txq_id].txb[idx];
 262                 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(txb->skb),
 263                                      txb->ctx, tx_resp, txq_id, true);
 264                 agg->wait_for_ba = 0;
 265         } else {
 266                 /* Two or more frames were attempted; expect block-ack */
 267                 u64 bitmap = 0;
 268
 269                 /*
 270                  * Start is the lowest frame sent. It may not be the first
 271                  * frame in the batch; we figure this out dynamically during
 272                  * the following loop.
 273                  */
 274                 int start = agg->start_idx;
 275
 276                 /* Construct bit-map of pending frames within Tx window */
 277                 for (i = 0; i < agg->frame_count; i++) {
 278                         u16 sc;
 279                         status = le16_to_cpu(frame_status[i].status);
 280                         seq  = le16_to_cpu(frame_status[i].sequence);
 281                         idx = SEQ_TO_INDEX(seq);
 282                         txq_id = SEQ_TO_QUEUE(seq);
 283
 284                         if (status & AGG_TX_STATUS_MSK)
 285                                 iwlagn_count_agg_tx_err_status(priv, status);
 286
 287                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
 288                                       AGG_TX_STATE_ABORT_MSK))
 289                                 continue;
 290
 291                         IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
 292                                            agg->frame_count, txq_id, idx);
 293                         IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
 294                                            "try-count (0x%08x)\n",
 295                                            iwl_get_agg_tx_fail_reason(status),
 296                                            status & AGG_TX_STATUS_MSK,
 297                                            status & AGG_TX_TRY_MSK);
 298
 299                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
 300                         if (!hdr) {
 301                                 IWL_ERR(priv,
 302                                         "BUG_ON idx doesn't point to valid skb"
 303                                         " idx=%d, txq_id=%d\n", idx, txq_id);
 304                                 return -1;
 305                         }
 306
 307                         sc = le16_to_cpu(hdr->seq_ctrl);
 308                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
 309                                 IWL_ERR(priv,
 310                                         "BUG_ON idx doesn't match seq control"
 311                                         " idx=%d, seq_idx=%d, seq=%d\n",
 312                                           idx, SEQ_TO_SN(sc),
 313                                           hdr->seq_ctrl);
 314                                 return -1;
 315                         }
 316
 317                         IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
 318                                            i, idx, SEQ_TO_SN(sc));
 319
 320                         /*
 321                          * sh -> how many frames ahead of the starting frame is
 322                          * the current one?
 323                          *
 324                          * Note that all frames sent in the batch must be in a
 325                          * 64-frame window, so this number should be in [0,63].
 326                          * If outside of this window, then we've found a new
 327                          * "first" frame in the batch and need to change start.
 328                          */
 329                         sh = idx - start;
 330
 331                         /*
 332                          * If >= 64, out of window. start must be at the front
 333                          * of the circular buffer, idx must be near the end of
 334                          * the buffer, and idx is the new "first" frame. Shift
 335                          * the indices around.
 336                          */
 337                         if (sh >= 64) {
 338                                 /* Shift bitmap by start - idx, wrapped */
 339                                 sh = 0x100 - idx + start;
 340                                 bitmap = bitmap << sh;
 341                                 /* Now idx is the new start so sh = 0 */
 342                                 sh = 0;
 343                                 start = idx;
 344                         /*
 345                          * If <= -64 then wraps the 256-pkt circular buffer
 346                          * (e.g., start = 255 and idx = 0, sh should be 1)
 347                          */
 348                         } else if (sh <= -64) {
 349                                 sh  = 0x100 - start + idx;
 350                         /*
 351                          * If < 0 but > -64, out of window. idx is before start
 352                          * but not wrapped. Shift the indices around.
 353                          */
 354                         } else if (sh < 0) {
 355                                 /* Shift by how far start is ahead of idx */
 356                                 sh = start - idx;
 357                                 bitmap = bitmap << sh;
 358                                 /* Now idx is the new start so sh = 0 */
 359                                 start = idx;
 360                                 sh = 0;
 361                         }
 362                         /* Sequence number start + sh was sent in this batch */
 363                         bitmap |= 1ULL << sh;
 364                         IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
 365                                            start, (unsigned long long)bitmap);
 366                 }
 367
 368                 /*
 369                  * Store the bitmap and possibly the new start, if we wrapped
 370                  * the buffer above
 371                  */
 372                 agg->bitmap = bitmap;
 373                 agg->start_idx = start;
 374                 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
 375                                    agg->frame_count, agg->start_idx,
 376                                    (unsigned long long)agg->bitmap);
 377
 378                 if (bitmap)
 379                         agg->wait_for_ba = 1;
 380         }
 381         return 0;
 382 }
 383
 384 void iwl_check_abort_status(struct iwl_priv *priv,
 385                             u8 frame_count, u32 status)
 386 {
 387         if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
 388                 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
 389                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
 390                         queue_work(priv->workqueue, &priv->tx_flush);
 391         }
 392 }
 393
 394 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 395 {
 396         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 397         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 398         int txq_id = SEQ_TO_QUEUE(sequence);
 399         int index = SEQ_TO_INDEX(sequence);
 400         struct iwl_tx_queue *txq = &priv->txq[txq_id];
 401         struct ieee80211_tx_info *info;
 402         struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 403         struct ieee80211_hdr *hdr;
 404         struct iwl_tx_info *txb;
 405         u32 status = le16_to_cpu(tx_resp->status.status);
 406         int tid;
 407         int sta_id;
 408         int freed;
 409         unsigned long flags;
 410
 411         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
 412                 IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) "
 413                           "index %d is out of range [0-%d] %d %d\n", __func__,
 414                           txq_id, index, txq->q.n_bd, txq->q.write_ptr,
 415                           txq->q.read_ptr);
 416                 return;
 417         }
 418
 419         txq->time_stamp = jiffies;
 420         txb = &txq->txb[txq->q.read_ptr];
 421         info = IEEE80211_SKB_CB(txb->skb);
 422         memset(&info->status, 0, sizeof(info->status));
 423
 424         tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
 425                 IWLAGN_TX_RES_TID_POS;
 426         sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
 427                 IWLAGN_TX_RES_RA_POS;
 428
 429         spin_lock_irqsave(&priv->sta_lock, flags);
 430
 431         hdr = (void *)txb->skb->data;
 432         if (!ieee80211_is_data_qos(hdr->frame_control))
 433                 priv->last_seq_ctl = tx_resp->seq_ctl;
 434
 435         if (txq->sched_retry) {
 436                 const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
 437                 struct iwl_ht_agg *agg;
 438
 439                 agg = &priv->stations[sta_id].tid[tid].agg;
 440                 /*
 441                  * If the BT kill count is non-zero, we'll get this
 442                  * notification again.
 443                  */
 444                 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
 445                     priv->cfg->bt_params &&
 446                     priv->cfg->bt_params->advanced_bt_coexist) {
 447                         IWL_DEBUG_COEX(priv, "receive reply tx with bt_kill\n");
 448                 }
 449                 iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
 450
 451                 /* check if BAR is needed */
 452                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
 453                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
 454
 455                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
 456                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
 457                         IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
 458                                         "scd_ssn=%d idx=%d txq=%d swq=%d\n",
 459                                         scd_ssn , index, txq_id, txq->swq_id);
 460
 461                         freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
 462                         iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
 463
 464                         if (priv->mac80211_registered &&
 465                             (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
 466                             (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
 467                                 iwl_wake_queue(priv, txq);
 468                 }
 469         } else {
 470                 iwlagn_set_tx_status(priv, info, txb->ctx, tx_resp,
 471                                      txq_id, false);
 472                 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
 473                 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
 474
 475                 if (priv->mac80211_registered &&
 476                     iwl_queue_space(&txq->q) > txq->q.low_mark &&
 477                     status != TX_STATUS_FAIL_PASSIVE_NO_RX)
 478                         iwl_wake_queue(priv, txq);
 479         }
 480
 481         iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
 482
 483         iwl_check_abort_status(priv, tx_resp->frame_count, status);
 484         spin_unlock_irqrestore(&priv->sta_lock, flags);
 485 }
 486
 487 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
 488 {
 489         return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
 490                 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
 491 }
 492
 493 int iwlagn_send_tx_power(struct iwl_priv *priv)
 494 {
 495         struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
 496         u8 tx_ant_cfg_cmd;
 497
 498         if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
 499                       "TX Power requested while scanning!\n"))
 500                 return -EAGAIN;
 501
 502         /* half dBm need to multiply */
 503         tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
 504
 505         if (priv->tx_power_lmt_in_half_dbm &&
 506             priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
 507                 /*
 508                  * For the newer devices which using enhanced/extend tx power
 509                  * table in EEPROM, the format is in half dBm. driver need to
 510                  * convert to dBm format before report to mac80211.
 511                  * By doing so, there is a possibility of 1/2 dBm resolution
 512                  * lost. driver will perform "round-up" operation before
 513                  * reporting, but it will cause 1/2 dBm tx power over the
 514                  * regulatory limit. Perform the checking here, if the
 515                  * "tx_power_user_lmt" is higher than EEPROM value (in
 516                  * half-dBm format), lower the tx power based on EEPROM
 517                  */
 518                 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
 519         }
 520         tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
 521         tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
 522
 523         if (IWL_UCODE_API(priv->ucode_ver) == 1)
 524                 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
 525         else
 526                 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
 527
 528         return trans_send_cmd_pdu(&priv->trans, tx_ant_cfg_cmd, CMD_SYNC,
 529                         sizeof(tx_power_cmd), &tx_power_cmd);
 530 }
 531
 532 void iwlagn_temperature(struct iwl_priv *priv)
 533 {
 534         /* store temperature from correct statistics (in Celsius) */
 535         priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
 536         iwl_tt_handler(priv);
 537 }
 538
 539 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
 540 {
 541         struct iwl_eeprom_calib_hdr {
 542                 u8 version;
 543                 u8 pa_type;
 544                 u16 voltage;
 545         } *hdr;
 546
 547         hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
 548                                                         EEPROM_CALIB_ALL);
 549         return hdr->version;
 550
 551 }
 552
 553 /*
 554  * EEPROM
 555  */
 556 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
 557 {
 558         u16 offset = 0;
 559
 560         if ((address & INDIRECT_ADDRESS) == 0)
 561                 return address;
 562
 563         switch (address & INDIRECT_TYPE_MSK) {
 564         case INDIRECT_HOST:
 565                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
 566                 break;
 567         case INDIRECT_GENERAL:
 568                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
 569                 break;
 570         case INDIRECT_REGULATORY:
 571                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
 572                 break;
 573         case INDIRECT_TXP_LIMIT:
 574                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
 575                 break;
 576         case INDIRECT_TXP_LIMIT_SIZE:
 577                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
 578                 break;
 579         case INDIRECT_CALIBRATION:
 580                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
 581                 break;
 582         case INDIRECT_PROCESS_ADJST:
 583                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
 584                 break;
 585         case INDIRECT_OTHERS:
 586                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
 587                 break;
 588         default:
 589                 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
 590                 address & INDIRECT_TYPE_MSK);
 591                 break;
 592         }
 593
 594         /* translate the offset from words to byte */
 595         return (address & ADDRESS_MSK) + (offset << 1);
 596 }
 597
 598 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
 599 {
 600         u32 address = eeprom_indirect_address(priv, offset);
 601         BUG_ON(address >= priv->cfg->base_params->eeprom_size);
 602         return &priv->eeprom[address];
 603 }
 604
 605 struct iwl_mod_params iwlagn_mod_params = {
 606         .amsdu_size_8K = 1,
 607         .restart_fw = 1,
 608         .plcp_check = true,
 609         .bt_coex_active = true,
 610         .no_sleep_autoadjust = true,
 611         .power_level = IWL_POWER_INDEX_1,
 612         /* the rest are 0 by default */
 613 };
 614
 615 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
 616 {
 617         int idx = 0;
 618         int band_offset = 0;
 619
 620         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
 621         if (rate_n_flags & RATE_MCS_HT_MSK) {
 622                 idx = (rate_n_flags & 0xff);
 623                 return idx;
 624         /* Legacy rate format, search for match in table */
 625         } else {
 626                 if (band == IEEE80211_BAND_5GHZ)
 627                         band_offset = IWL_FIRST_OFDM_RATE;
 628                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 629                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 630                                 return idx - band_offset;
 631         }
 632
 633         return -1;
 634 }
 635
 636 static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
 637                                            struct ieee80211_vif *vif,
 638                                            enum ieee80211_band band,
 639                                            struct iwl_scan_channel *scan_ch)
 640 {
 641         const struct ieee80211_supported_band *sband;
 642         u16 passive_dwell = 0;
 643         u16 active_dwell = 0;
 644         int added = 0;
 645         u16 channel = 0;
 646
 647         sband = iwl_get_hw_mode(priv, band);
 648         if (!sband) {
 649                 IWL_ERR(priv, "invalid band\n");
 650                 return added;
 651         }
 652
 653         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
 654         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
 655
 656         if (passive_dwell <= active_dwell)
 657                 passive_dwell = active_dwell + 1;
 658
 659         channel = iwl_get_single_channel_number(priv, band);
 660         if (channel) {
 661                 scan_ch->channel = cpu_to_le16(channel);
 662                 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
 663                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
 664                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
 665                 /* Set txpower levels to defaults */
 666                 scan_ch->dsp_atten = 110;
 667                 if (band == IEEE80211_BAND_5GHZ)
 668                         scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
 669                 else
 670                         scan_ch->tx_gain = ((1 << 5) | (5 << 3));
 671                 added++;
 672         } else
 673                 IWL_ERR(priv, "no valid channel found\n");
 674         return added;
 675 }
 676
 677 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
 678                                      struct ieee80211_vif *vif,
 679                                      enum ieee80211_band band,
 680                                      u8 is_active, u8 n_probes,
 681                                      struct iwl_scan_channel *scan_ch)
 682 {
 683         struct ieee80211_channel *chan;
 684         const struct ieee80211_supported_band *sband;
 685         const struct iwl_channel_info *ch_info;
 686         u16 passive_dwell = 0;
 687         u16 active_dwell = 0;
 688         int added, i;
 689         u16 channel;
 690
 691         sband = iwl_get_hw_mode(priv, band);
 692         if (!sband)
 693                 return 0;
 694
 695         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
 696         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
 697
 698         if (passive_dwell <= active_dwell)
 699                 passive_dwell = active_dwell + 1;
 700
 701         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
 702                 chan = priv->scan_request->channels[i];
 703
 704                 if (chan->band != band)
 705                         continue;
 706
 707                 channel = chan->hw_value;
 708                 scan_ch->channel = cpu_to_le16(channel);
 709
 710                 ch_info = iwl_get_channel_info(priv, band, channel);
 711                 if (!is_channel_valid(ch_info)) {
 712                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
 713                                         channel);
 714                         continue;
 715                 }
 716
 717                 if (!is_active || is_channel_passive(ch_info) ||
 718                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
 719                         scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
 720                 else
 721                         scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
 722
 723                 if (n_probes)
 724                         scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
 725
 726                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
 727                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
 728
 729                 /* Set txpower levels to defaults */
 730                 scan_ch->dsp_atten = 110;
 731
 732                 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
 733                  * power level:
 734                  * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
 735                  */
 736                 if (band == IEEE80211_BAND_5GHZ)
 737                         scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
 738                 else
 739                         scan_ch->tx_gain = ((1 << 5) | (5 << 3));
 740
 741                 IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
 742                                channel, le32_to_cpu(scan_ch->type),
 743                                (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
 744                                 "ACTIVE" : "PASSIVE",
 745                                (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
 746                                active_dwell : passive_dwell);
 747
 748                 scan_ch++;
 749                 added++;
 750         }
 751
 752         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
 753         return added;
 754 }
 755
 756 int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 757 {
 758         struct iwl_host_cmd cmd = {
 759                 .id = REPLY_SCAN_CMD,
 760                 .len = { sizeof(struct iwl_scan_cmd), },
 761                 .flags = CMD_SYNC,
 762         };
 763         struct iwl_scan_cmd *scan;
 764         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 765         u32 rate_flags = 0;
 766         u16 cmd_len;
 767         u16 rx_chain = 0;
 768         enum ieee80211_band band;
 769         u8 n_probes = 0;
 770         u8 rx_ant = priv->hw_params.valid_rx_ant;
 771         u8 rate;
 772         bool is_active = false;
 773         int  chan_mod;
 774         u8 active_chains;
 775         u8 scan_tx_antennas = priv->hw_params.valid_tx_ant;
 776         int ret;
 777
 778         lockdep_assert_held(&priv->mutex);
 779
 780         if (vif)
 781                 ctx = iwl_rxon_ctx_from_vif(vif);
 782
 783         if (!priv->scan_cmd) {
 784                 priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
 785                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
 786                 if (!priv->scan_cmd) {
 787                         IWL_DEBUG_SCAN(priv,
 788                                        "fail to allocate memory for scan\n");
 789                         return -ENOMEM;
 790                 }
 791         }
 792         scan = priv->scan_cmd;
 793         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
 794
 795         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
 796         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
 797
 798         if (priv->scan_type != IWL_SCAN_ROC &&
 799             iwl_is_any_associated(priv)) {
 800                 u16 interval = 0;
 801                 u32 extra;
 802                 u32 suspend_time = 100;
 803                 u32 scan_suspend_time = 100;
 804
 805                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
 806                 switch (priv->scan_type) {
 807                 case IWL_SCAN_ROC:
 808                         WARN_ON(1);
 809                         break;
 810                 case IWL_SCAN_RADIO_RESET:
 811                         interval = 0;
 812                         break;
 813                 case IWL_SCAN_NORMAL:
 814                         interval = vif->bss_conf.beacon_int;
 815                         break;
 816                 }
 817
 818                 scan->suspend_time = 0;
 819                 scan->max_out_time = cpu_to_le32(200 * 1024);
 820                 if (!interval)
 821                         interval = suspend_time;
 822
 823                 extra = (suspend_time / interval) << 22;
 824                 scan_suspend_time = (extra |
 825                     ((suspend_time % interval) * 1024));
 826                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
 827                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
 828                                scan_suspend_time, interval);
 829         } else if (priv->scan_type == IWL_SCAN_ROC) {
 830                 scan->suspend_time = 0;
 831                 scan->max_out_time = 0;
 832                 scan->quiet_time = 0;
 833                 scan->quiet_plcp_th = 0;
 834         }
 835
 836         switch (priv->scan_type) {
 837         case IWL_SCAN_RADIO_RESET:
 838                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
 839                 break;
 840         case IWL_SCAN_NORMAL:
 841                 if (priv->scan_request->n_ssids) {
 842                         int i, p = 0;
 843                         IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
 844                         for (i = 0; i < priv->scan_request->n_ssids; i++) {
 845                                 /* always does wildcard anyway */
 846                                 if (!priv->scan_request->ssids[i].ssid_len)
 847                                         continue;
 848                                 scan->direct_scan[p].id = WLAN_EID_SSID;
 849                                 scan->direct_scan[p].len =
 850                                         priv->scan_request->ssids[i].ssid_len;
 851                                 memcpy(scan->direct_scan[p].ssid,
 852                                        priv->scan_request->ssids[i].ssid,
 853                                        priv->scan_request->ssids[i].ssid_len);
 854                                 n_probes++;
 855                                 p++;
 856                         }
 857                         is_active = true;
 858                 } else
 859                         IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
 860                 break;
 861         case IWL_SCAN_ROC:
 862                 IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
 863                 break;
 864         }
 865
 866         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
 867         scan->tx_cmd.sta_id = ctx->bcast_sta_id;
 868         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 869
 870         switch (priv->scan_band) {
 871         case IEEE80211_BAND_2GHZ:
 872                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
 873                 chan_mod = le32_to_cpu(
 874                         priv->contexts[IWL_RXON_CTX_BSS].active.flags &
 875                                                 RXON_FLG_CHANNEL_MODE_MSK)
 876                                        >> RXON_FLG_CHANNEL_MODE_POS;
 877                 if (chan_mod == CHANNEL_MODE_PURE_40) {
 878                         rate = IWL_RATE_6M_PLCP;
 879                 } else {
 880                         rate = IWL_RATE_1M_PLCP;
 881                         rate_flags = RATE_MCS_CCK_MSK;
 882                 }
 883                 /*
 884                  * Internal scans are passive, so we can indiscriminately set
 885                  * the BT ignore flag on 2.4 GHz since it applies to TX only.
 886                  */
 887                 if (priv->cfg->bt_params &&
 888                     priv->cfg->bt_params->advanced_bt_coexist)
 889                         scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
 890                 break;
 891         case IEEE80211_BAND_5GHZ:
 892                 rate = IWL_RATE_6M_PLCP;
 893                 break;
 894         default:
 895                 IWL_WARN(priv, "Invalid scan band\n");
 896                 return -EIO;
 897         }
 898
 899         /*
 900          * If active scanning is requested but a certain channel is
 901          * marked passive, we can do active scanning if we detect
 902          * transmissions.
 903          *
 904          * There is an issue with some firmware versions that triggers
 905          * a sysassert on a "good CRC threshold" of zero (== disabled),
 906          * on a radar channel even though this means that we should NOT
 907          * send probes.
 908          *
 909          * The "good CRC threshold" is the number of frames that we
 910          * need to receive during our dwell time on a channel before
 911          * sending out probes -- setting this to a huge value will
 912          * mean we never reach it, but at the same time work around
 913          * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
 914          * here instead of IWL_GOOD_CRC_TH_DISABLED.
 915          *
 916          * This was fixed in later versions along with some other
 917          * scan changes, and the threshold behaves as a flag in those
 918          * versions.
 919          */
 920         if (priv->new_scan_threshold_behaviour)
 921                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
 922                                                 IWL_GOOD_CRC_TH_DISABLED;
 923         else
 924                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
 925                                                 IWL_GOOD_CRC_TH_NEVER;
 926
 927         band = priv->scan_band;
 928
 929         if (priv->cfg->scan_rx_antennas[band])
 930                 rx_ant = priv->cfg->scan_rx_antennas[band];
 931
 932         if (band == IEEE80211_BAND_2GHZ &&
 933             priv->cfg->bt_params &&
 934             priv->cfg->bt_params->advanced_bt_coexist) {
 935                 /* transmit 2.4 GHz probes only on first antenna */
 936                 scan_tx_antennas = first_antenna(scan_tx_antennas);
 937         }
 938
 939         priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
 940                                                     scan_tx_antennas);
 941         rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
 942         scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
 943
 944         /* In power save mode use one chain, otherwise use all chains */
 945         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
 946                 /* rx_ant has been set to all valid chains previously */
 947                 active_chains = rx_ant &
 948                                 ((u8)(priv->chain_noise_data.active_chains));
 949                 if (!active_chains)
 950                         active_chains = rx_ant;
 951
 952                 IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
 953                                 priv->chain_noise_data.active_chains);
 954
 955                 rx_ant = first_antenna(active_chains);
 956         }
 957         if (priv->cfg->bt_params &&
 958             priv->cfg->bt_params->advanced_bt_coexist &&
 959             priv->bt_full_concurrent) {
 960                 /* operated as 1x1 in full concurrency mode */
 961                 rx_ant = first_antenna(rx_ant);
 962         }
 963
 964         /* MIMO is not used here, but value is required */
 965         rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
 966         rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 967         rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
 968         rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 969         scan->rx_chain = cpu_to_le16(rx_chain);
 970         switch (priv->scan_type) {
 971         case IWL_SCAN_NORMAL:
 972                 cmd_len = iwl_fill_probe_req(priv,
 973                                         (struct ieee80211_mgmt *)scan->data,
 974                                         vif->addr,
 975                                         priv->scan_request->ie,
 976                                         priv->scan_request->ie_len,
 977                                         IWL_MAX_SCAN_SIZE - sizeof(*scan));
 978                 break;
 979         case IWL_SCAN_RADIO_RESET:
 980         case IWL_SCAN_ROC:
 981                 /* use bcast addr, will not be transmitted but must be valid */
 982                 cmd_len = iwl_fill_probe_req(priv,
 983                                         (struct ieee80211_mgmt *)scan->data,
 984                                         iwl_bcast_addr, NULL, 0,
 985                                         IWL_MAX_SCAN_SIZE - sizeof(*scan));
 986                 break;
 987         default:
 988                 BUG();
 989         }
 990         scan->tx_cmd.len = cpu_to_le16(cmd_len);
 991
 992         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
 993                                RXON_FILTER_BCON_AWARE_MSK);
 994
 995         switch (priv->scan_type) {
 996         case IWL_SCAN_RADIO_RESET:
 997                 scan->channel_count =
 998                         iwl_get_single_channel_for_scan(priv, vif, band,
 999                                 (void *)&scan->data[cmd_len]);
1000                 break;
1001         case IWL_SCAN_NORMAL:
1002                 scan->channel_count =
1003                         iwl_get_channels_for_scan(priv, vif, band,
1004                                 is_active, n_probes,
1005                                 (void *)&scan->data[cmd_len]);
1006                 break;
1007         case IWL_SCAN_ROC: {
1008                 struct iwl_scan_channel *scan_ch;
1009
1010                 scan->channel_count = 1;
1011
1012                 scan_ch = (void *)&scan->data[cmd_len];
1013                 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
1014                 scan_ch->channel =
1015                         cpu_to_le16(priv->hw_roc_channel->hw_value);
1016                 scan_ch->active_dwell =
1017                 scan_ch->passive_dwell =
1018                         cpu_to_le16(priv->hw_roc_duration);
1019
1020                 /* Set txpower levels to defaults */
1021                 scan_ch->dsp_atten = 110;
1022
1023                 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1024                  * power level:
1025                  * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
1026                  */
1027                 if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
1028                         scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1029                 else
1030                         scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1031                 }
1032                 break;
1033         }
1034
1035         if (scan->channel_count == 0) {
1036                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
1037                 return -EIO;
1038         }
1039
1040         cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
1041             scan->channel_count * sizeof(struct iwl_scan_channel);
1042         cmd.data[0] = scan;
1043         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1044         scan->len = cpu_to_le16(cmd.len[0]);
1045
1046         /* set scan bit here for PAN params */
1047         set_bit(STATUS_SCAN_HW, &priv->status);
1048
1049         ret = iwlagn_set_pan_params(priv);
1050         if (ret)
1051                 return ret;
1052
1053         ret = trans_send_cmd(&priv->trans, &cmd);
1054         if (ret) {
1055                 clear_bit(STATUS_SCAN_HW, &priv->status);
1056                 iwlagn_set_pan_params(priv);
1057         }
1058
1059         return ret;
1060 }
1061
1062 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
1063                                struct ieee80211_vif *vif, bool add)
1064 {
1065         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1066
1067         if (add)
1068                 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
1069                                                 vif->bss_conf.bssid,
1070                                                 &vif_priv->ibss_bssid_sta_id);
1071         return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
1072                                   vif->bss_conf.bssid);
1073 }
1074
1075 void iwl_free_tfds_in_queue(struct iwl_priv *priv,
1076                             int sta_id, int tid, int freed)
1077 {
1078         lockdep_assert_held(&priv->sta_lock);
1079
1080         if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1081                 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1082         else {
1083                 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
1084                         priv->stations[sta_id].tid[tid].tfds_in_queue,
1085                         freed);
1086                 priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
1087         }
1088 }
1089
1090 #define IWL_FLUSH_WAIT_MS       2000
1091
1092 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
1093 {
1094         struct iwl_tx_queue *txq;
1095         struct iwl_queue *q;
1096         int cnt;
1097         unsigned long now = jiffies;
1098         int ret = 0;
1099
1100         /* waiting for all the tx frames complete might take a while */
1101         for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1102                 if (cnt == priv->cmd_queue)
1103                         continue;
1104                 txq = &priv->txq[cnt];
1105                 q = &txq->q;
1106                 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1107                        now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1108                                 msleep(1);
1109
1110                 if (q->read_ptr != q->write_ptr) {
1111                         IWL_ERR(priv, "fail to flush all tx fifo queues\n");
1112                         ret = -ETIMEDOUT;
1113                         break;
1114                 }
1115         }
1116         return ret;
1117 }
1118
1119 #define IWL_TX_QUEUE_MSK        0xfffff
1120
1121 /**
1122  * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
1123  *
1124  * pre-requirements:
1125  *  1. acquire mutex before calling
1126  *  2. make sure rf is on and not in exit state
1127  */
1128 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1129 {
1130         struct iwl_txfifo_flush_cmd flush_cmd;
1131         struct iwl_host_cmd cmd = {
1132                 .id = REPLY_TXFIFO_FLUSH,
1133                 .len = { sizeof(struct iwl_txfifo_flush_cmd), },
1134                 .flags = CMD_SYNC,
1135                 .data = { &flush_cmd, },
1136         };
1137
1138         might_sleep();
1139
1140         memset(&flush_cmd, 0, sizeof(flush_cmd));
1141         if (flush_control & BIT(IWL_RXON_CTX_BSS))
1142                 flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
1143                                  IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
1144                                  IWL_SCD_MGMT_MSK;
1145         if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
1146             (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
1147                 flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
1148                                 IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
1149                                 IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
1150                                 IWL_PAN_SCD_MULTICAST_MSK;
1151
1152         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
1153                 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
1154
1155         IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
1156                        flush_cmd.fifo_control);
1157         flush_cmd.flush_control = cpu_to_le16(flush_control);
1158
1159         return trans_send_cmd(&priv->trans, &cmd);
1160 }
1161
1162 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1163 {
1164         mutex_lock(&priv->mutex);
1165         ieee80211_stop_queues(priv->hw);
1166         if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1167                 IWL_ERR(priv, "flush request fail\n");
1168                 goto done;
1169         }
1170         IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
1171         iwlagn_wait_tx_queue_empty(priv);
1172 done:
1173         ieee80211_wake_queues(priv->hw);
1174         mutex_unlock(&priv->mutex);
1175 }
1176
1177 /*
1178  * BT coex
1179  */
1180 /*
1181  * Macros to access the lookup table.
1182  *
1183  * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
1184 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
1185  *
1186  * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
1187  *
1188  * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
1189  * one after another in 32-bit registers, and "registers" 0 through 7 contain
1190  * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
1191  *
1192  * These macros encode that format.
1193  */
1194 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
1195                   wifi_txrx, wifi_sh_ant_req) \
1196         (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
1197         (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
1198
1199 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
1200         lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
1201 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1202                                  wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1203         (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
1204                                    bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1205                                    wifi_sh_ant_req))))
1206 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1207                                 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1208         LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
1209                                bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1210                                wifi_sh_ant_req))
1211 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
1212                                   wifi_req, wifi_prio, wifi_txrx, \
1213                                   wifi_sh_ant_req) \
1214         LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
1215                                bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1216                                wifi_sh_ant_req))
1217
1218 #define LUT_WLAN_KILL_OP(lut, op, val) \
1219         lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
1220 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1221                            wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1222         (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1223                              wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
1224 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1225                           wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1226         LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1227                          wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1228 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1229                             wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1230         LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1231                          wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1232
1233 #define LUT_ANT_SWITCH_OP(lut, op, val) \
1234         lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
1235 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1236                             wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1237         (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1238                               wifi_req, wifi_prio, wifi_txrx, \
1239                               wifi_sh_ant_req))))
1240 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1241                            wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1242         LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1243                           wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1244 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1245                              wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1246         LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1247                           wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1248
1249 static const __le32 iwlagn_def_3w_lookup[12] = {
1250         cpu_to_le32(0xaaaaaaaa),
1251         cpu_to_le32(0xaaaaaaaa),
1252         cpu_to_le32(0xaeaaaaaa),
1253         cpu_to_le32(0xaaaaaaaa),
1254         cpu_to_le32(0xcc00ff28),
1255         cpu_to_le32(0x0000aaaa),
1256         cpu_to_le32(0xcc00aaaa),
1257         cpu_to_le32(0x0000aaaa),
1258         cpu_to_le32(0xc0004000),
1259         cpu_to_le32(0x00004000),
1260         cpu_to_le32(0xf0005000),
1261         cpu_to_le32(0xf0005000),
1262 };
1263
1264 static const __le32 iwlagn_concurrent_lookup[12] = {
1265         cpu_to_le32(0xaaaaaaaa),
1266         cpu_to_le32(0xaaaaaaaa),
1267         cpu_to_le32(0xaaaaaaaa),
1268         cpu_to_le32(0xaaaaaaaa),
1269         cpu_to_le32(0xaaaaaaaa),
1270         cpu_to_le32(0xaaaaaaaa),
1271         cpu_to_le32(0xaaaaaaaa),
1272         cpu_to_le32(0xaaaaaaaa),
1273         cpu_to_le32(0x00000000),
1274         cpu_to_le32(0x00000000),
1275         cpu_to_le32(0x00000000),
1276         cpu_to_le32(0x00000000),
1277 };
1278
1279 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
1280 {
1281         struct iwl_basic_bt_cmd basic = {
1282                 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
1283                 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
1284                 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
1285                 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
1286         };
1287         struct iwl6000_bt_cmd bt_cmd_6000;
1288         struct iwl2000_bt_cmd bt_cmd_2000;
1289         int ret;
1290
1291         BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
1292                         sizeof(basic.bt3_lookup_table));
1293
1294         if (priv->cfg->bt_params) {
1295                 if (priv->cfg->bt_params->bt_session_2) {
1296                         bt_cmd_2000.prio_boost = cpu_to_le32(
1297                                 priv->cfg->bt_params->bt_prio_boost);
1298                         bt_cmd_2000.tx_prio_boost = 0;
1299                         bt_cmd_2000.rx_prio_boost = 0;
1300                 } else {
1301                         bt_cmd_6000.prio_boost =
1302                                 priv->cfg->bt_params->bt_prio_boost;
1303                         bt_cmd_6000.tx_prio_boost = 0;
1304                         bt_cmd_6000.rx_prio_boost = 0;
1305                 }
1306         } else {
1307                 IWL_ERR(priv, "failed to construct BT Coex Config\n");
1308                 return;
1309         }
1310
1311         basic.kill_ack_mask = priv->kill_ack_mask;
1312         basic.kill_cts_mask = priv->kill_cts_mask;
1313         basic.valid = priv->bt_valid;
1314
1315         /*
1316          * Configure BT coex mode to "no coexistence" when the
1317          * user disabled BT coexistence, we have no interface
1318          * (might be in monitor mode), or the interface is in
1319          * IBSS mode (no proper uCode support for coex then).
1320          */
1321         if (!iwlagn_mod_params.bt_coex_active ||
1322             priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1323                 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
1324         } else {
1325                 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
1326                                         IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
1327
1328                 if (!priv->bt_enable_pspoll)
1329                         basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1330                 else
1331                         basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1332
1333                 if (priv->bt_ch_announce)
1334                         basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
1335                 IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
1336         }
1337         priv->bt_enable_flag = basic.flags;
1338         if (priv->bt_full_concurrent)
1339                 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
1340                         sizeof(iwlagn_concurrent_lookup));
1341         else
1342                 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
1343                         sizeof(iwlagn_def_3w_lookup));
1344
1345         IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
1346                        basic.flags ? "active" : "disabled",
1347                        priv->bt_full_concurrent ?
1348                        "full concurrency" : "3-wire");
1349
1350         if (priv->cfg->bt_params->bt_session_2) {
1351                 memcpy(&bt_cmd_2000.basic, &basic,
1352                         sizeof(basic));
1353                 ret = trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1354                         CMD_SYNC, sizeof(bt_cmd_2000), &bt_cmd_2000);
1355         } else {
1356                 memcpy(&bt_cmd_6000.basic, &basic,
1357                         sizeof(basic));
1358                 ret = trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1359                         CMD_SYNC, sizeof(bt_cmd_6000), &bt_cmd_6000);
1360         }
1361         if (ret)
1362                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1363
1364 }
1365
1366 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
1367 {
1368         struct iwl_rxon_context *ctx, *found_ctx = NULL;
1369         bool found_ap = false;
1370
1371         lockdep_assert_held(&priv->mutex);
1372
1373         /* Check whether AP or GO mode is active. */
1374         if (rssi_ena) {
1375                 for_each_context(priv, ctx) {
1376                         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
1377                             iwl_is_associated_ctx(ctx)) {
1378                                 found_ap = true;
1379                                 break;
1380                         }
1381                 }
1382         }
1383
1384         /*
1385          * If disable was received or If GO/AP mode, disable RSSI
1386          * measurements.
1387          */
1388         if (!rssi_ena || found_ap) {
1389                 if (priv->cur_rssi_ctx) {
1390                         ctx = priv->cur_rssi_ctx;
1391                         ieee80211_disable_rssi_reports(ctx->vif);
1392                         priv->cur_rssi_ctx = NULL;
1393                 }
1394                 return;
1395         }
1396
1397         /*
1398          * If rssi measurements need to be enabled, consider all cases now.
1399          * Figure out how many contexts are active.
1400          */
1401         for_each_context(priv, ctx) {
1402                 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
1403                     iwl_is_associated_ctx(ctx)) {
1404                         found_ctx = ctx;
1405                         break;
1406                 }
1407         }
1408
1409         /*
1410          * rssi monitor already enabled for the correct interface...nothing
1411          * to do.
1412          */
1413         if (found_ctx == priv->cur_rssi_ctx)
1414                 return;
1415
1416         /*
1417          * Figure out if rssi monitor is currently enabled, and needs
1418          * to be changed. If rssi monitor is already enabled, disable
1419          * it first else just enable rssi measurements on the
1420          * interface found above.
1421          */
1422         if (priv->cur_rssi_ctx) {
1423                 ctx = priv->cur_rssi_ctx;
1424                 if (ctx->vif)
1425                         ieee80211_disable_rssi_reports(ctx->vif);
1426         }
1427
1428         priv->cur_rssi_ctx = found_ctx;
1429
1430         if (!found_ctx)
1431                 return;
1432
1433         ieee80211_enable_rssi_reports(found_ctx->vif,
1434                         IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
1435                         IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
1436 }
1437
1438 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
1439 {
1440         return BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3 >>
1441                         BT_UART_MSG_FRAME3SCOESCO_POS;
1442 }
1443
1444 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
1445 {
1446         struct iwl_priv *priv =
1447                 container_of(work, struct iwl_priv, bt_traffic_change_work);
1448         struct iwl_rxon_context *ctx;
1449         int smps_request = -1;
1450
1451         if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1452                 /* bt coex disabled */
1453                 return;
1454         }
1455
1456         /*
1457          * Note: bt_traffic_load can be overridden by scan complete and
1458          * coex profile notifications. Ignore that since only bad consequence
1459          * can be not matching debug print with actual state.
1460          */
1461         IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
1462                        priv->bt_traffic_load);
1463
1464         switch (priv->bt_traffic_load) {
1465         case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1466                 if (priv->bt_status)
1467                         smps_request = IEEE80211_SMPS_DYNAMIC;
1468                 else
1469                         smps_request = IEEE80211_SMPS_AUTOMATIC;
1470                 break;
1471         case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1472                 smps_request = IEEE80211_SMPS_DYNAMIC;
1473                 break;
1474         case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1475         case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1476                 smps_request = IEEE80211_SMPS_STATIC;
1477                 break;
1478         default:
1479                 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
1480                         priv->bt_traffic_load);
1481                 break;
1482         }
1483
1484         mutex_lock(&priv->mutex);
1485
1486         /*
1487          * We can not send command to firmware while scanning. When the scan
1488          * complete we will schedule this work again. We do check with mutex
1489          * locked to prevent new scan request to arrive. We do not check
1490          * STATUS_SCANNING to avoid race when queue_work two times from
1491          * different notifications, but quit and not perform any work at all.
1492          */
1493         if (test_bit(STATUS_SCAN_HW, &priv->status))
1494                 goto out;
1495
1496         iwl_update_chain_flags(priv);
1497
1498         if (smps_request != -1) {
1499                 priv->current_ht_config.smps = smps_request;
1500                 for_each_context(priv, ctx) {
1501                         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
1502                                 ieee80211_request_smps(ctx->vif, smps_request);
1503                 }
1504         }
1505
1506         /*
1507          * Dynamic PS poll related functionality. Adjust RSSI measurements if
1508          * necessary.
1509          */
1510         iwlagn_bt_coex_rssi_monitor(priv);
1511 out:
1512         mutex_unlock(&priv->mutex);
1513 }
1514
1515 /*
1516  * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
1517  * correct interface or disable it if this is the last interface to be
1518  * removed.
1519  */
1520 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
1521 {
1522         if (priv->bt_is_sco &&
1523             priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
1524                 iwlagn_bt_adjust_rssi_monitor(priv, true);
1525         else
1526                 iwlagn_bt_adjust_rssi_monitor(priv, false);
1527 }
1528
1529 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
1530                                 struct iwl_bt_uart_msg *uart_msg)
1531 {
1532         IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
1533                         "Update Req = 0x%X",
1534                 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
1535                         BT_UART_MSG_FRAME1MSGTYPE_POS,
1536                 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
1537                         BT_UART_MSG_FRAME1SSN_POS,
1538                 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
1539                         BT_UART_MSG_FRAME1UPDATEREQ_POS);
1540
1541         IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
1542                         "Chl_SeqN = 0x%X, In band = 0x%X",
1543                 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
1544                         BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
1545                 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
1546                         BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
1547                 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
1548                         BT_UART_MSG_FRAME2CHLSEQN_POS,
1549                 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
1550                         BT_UART_MSG_FRAME2INBAND_POS);
1551
1552         IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
1553                         "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
1554                 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
1555                         BT_UART_MSG_FRAME3SCOESCO_POS,
1556                 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
1557                         BT_UART_MSG_FRAME3SNIFF_POS,
1558                 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
1559                         BT_UART_MSG_FRAME3A2DP_POS,
1560                 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
1561                         BT_UART_MSG_FRAME3ACL_POS,
1562                 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
1563                         BT_UART_MSG_FRAME3MASTER_POS,
1564                 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
1565                         BT_UART_MSG_FRAME3OBEX_POS);
1566
1567         IWL_DEBUG_COEX(priv, "Idle duration = 0x%X",
1568                 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
1569                         BT_UART_MSG_FRAME4IDLEDURATION_POS);
1570
1571         IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
1572                         "eSCO Retransmissions = 0x%X",
1573                 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
1574                         BT_UART_MSG_FRAME5TXACTIVITY_POS,
1575                 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
1576                         BT_UART_MSG_FRAME5RXACTIVITY_POS,
1577                 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
1578                         BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
1579
1580         IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
1581                 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
1582                         BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
1583                 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
1584                         BT_UART_MSG_FRAME6DISCOVERABLE_POS);
1585
1586         IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
1587                         "0x%X, Inquiry = 0x%X, Connectable = 0x%X",
1588                 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
1589                         BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
1590                 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
1591                         BT_UART_MSG_FRAME7PAGE_POS,
1592                 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
1593                         BT_UART_MSG_FRAME7INQUIRY_POS,
1594                 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
1595                         BT_UART_MSG_FRAME7CONNECTABLE_POS);
1596 }
1597
1598 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
1599                                 struct iwl_bt_uart_msg *uart_msg)
1600 {
1601         u8 kill_msk;
1602         static const __le32 bt_kill_ack_msg[2] = {
1603                 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
1604                 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1605         static const __le32 bt_kill_cts_msg[2] = {
1606                 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
1607                 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1608
1609         kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
1610                 ? 1 : 0;
1611         if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
1612             priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
1613                 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
1614                 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
1615                 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
1616                 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
1617
1618                 /* schedule to send runtime bt_config */
1619                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1620         }
1621 }
1622
1623 void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
1624                                              struct iwl_rx_mem_buffer *rxb)
1625 {
1626         unsigned long flags;
1627         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1628         struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
1629         struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
1630
1631         if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1632                 /* bt coex disabled */
1633                 return;
1634         }
1635
1636         IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
1637         IWL_DEBUG_COEX(priv, "    status: %d\n", coex->bt_status);
1638         IWL_DEBUG_COEX(priv, "    traffic load: %d\n", coex->bt_traffic_load);
1639         IWL_DEBUG_COEX(priv, "    CI compliance: %d\n",
1640                         coex->bt_ci_compliance);
1641         iwlagn_print_uartmsg(priv, uart_msg);
1642
1643         priv->last_bt_traffic_load = priv->bt_traffic_load;
1644         priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
1645
1646         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
1647                 if (priv->bt_status != coex->bt_status ||
1648                     priv->last_bt_traffic_load != coex->bt_traffic_load) {
1649                         if (coex->bt_status) {
1650                                 /* BT on */
1651                                 if (!priv->bt_ch_announce)
1652                                         priv->bt_traffic_load =
1653                                                 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1654                                 else
1655                                         priv->bt_traffic_load =
1656                                                 coex->bt_traffic_load;
1657                         } else {
1658                                 /* BT off */
1659                                 priv->bt_traffic_load =
1660                                         IWL_BT_COEX_TRAFFIC_LOAD_NONE;
1661                         }
1662                         priv->bt_status = coex->bt_status;
1663                         queue_work(priv->workqueue,
1664                                    &priv->bt_traffic_change_work);
1665                 }
1666         }
1667
1668         iwlagn_set_kill_msk(priv, uart_msg);
1669
1670         /* FIXME: based on notification, adjust the prio_boost */
1671
1672         spin_lock_irqsave(&priv->lock, flags);
1673         priv->bt_ci_compliance = coex->bt_ci_compliance;
1674         spin_unlock_irqrestore(&priv->lock, flags);
1675 }
1676
1677 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
1678 {
1679         priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
1680                 iwlagn_bt_coex_profile_notif;
1681 }
1682
1683 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
1684 {
1685         INIT_WORK(&priv->bt_traffic_change_work,
1686                   iwlagn_bt_traffic_change_work);
1687 }
1688
1689 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
1690 {
1691         cancel_work_sync(&priv->bt_traffic_change_work);
1692 }
1693
1694 static bool is_single_rx_stream(struct iwl_priv *priv)
1695 {
1696         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1697                priv->current_ht_config.single_chain_sufficient;
1698 }
1699
1700 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
1701 #define IWL_NUM_RX_CHAINS_SINGLE        2
1702 #define IWL_NUM_IDLE_CHAINS_DUAL        2
1703 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
1704
1705 /*
1706  * Determine how many receiver/antenna chains to use.
1707  *
1708  * More provides better reception via diversity.  Fewer saves power
1709  * at the expense of throughput, but only when not in powersave to
1710  * start with.
1711  *
1712  * MIMO (dual stream) requires at least 2, but works better with 3.
1713  * This does not determine *which* chains to use, just how many.
1714  */
1715 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
1716 {
1717         if (priv->cfg->bt_params &&
1718             priv->cfg->bt_params->advanced_bt_coexist &&
1719             (priv->bt_full_concurrent ||
1720              priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1721                 /*
1722                  * only use chain 'A' in bt high traffic load or
1723                  * full concurrency mode
1724                  */
1725                 return IWL_NUM_RX_CHAINS_SINGLE;
1726         }
1727         /* # of Rx chains to use when expecting MIMO. */
1728         if (is_single_rx_stream(priv))
1729                 return IWL_NUM_RX_CHAINS_SINGLE;
1730         else
1731                 return IWL_NUM_RX_CHAINS_MULTIPLE;
1732 }
1733
1734 /*
1735  * When we are in power saving mode, unless device support spatial
1736  * multiplexing power save, use the active count for rx chain count.
1737  */
1738 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1739 {
1740         /* # Rx chains when idling, depending on SMPS mode */
1741         switch (priv->current_ht_config.smps) {
1742         case IEEE80211_SMPS_STATIC:
1743         case IEEE80211_SMPS_DYNAMIC:
1744                 return IWL_NUM_IDLE_CHAINS_SINGLE;
1745         case IEEE80211_SMPS_OFF:
1746                 return active_cnt;
1747         default:
1748                 WARN(1, "invalid SMPS mode %d",
1749                      priv->current_ht_config.smps);
1750                 return active_cnt;
1751         }
1752 }
1753
1754 /* up to 4 chains */
1755 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1756 {
1757         u8 res;
1758         res = (chain_bitmap & BIT(0)) >> 0;
1759         res += (chain_bitmap & BIT(1)) >> 1;
1760         res += (chain_bitmap & BIT(2)) >> 2;
1761         res += (chain_bitmap & BIT(3)) >> 3;
1762         return res;
1763 }
1764
1765 /**
1766  * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1767  *
1768  * Selects how many and which Rx receivers/antennas/chains to use.
1769  * This should not be used for scan command ... it puts data in wrong place.
1770  */
1771 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1772 {
1773         bool is_single = is_single_rx_stream(priv);
1774         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1775         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1776         u32 active_chains;
1777         u16 rx_chain;
1778
1779         /* Tell uCode which antennas are actually connected.
1780          * Before first association, we assume all antennas are connected.
1781          * Just after first association, iwl_chain_noise_calibration()
1782          *    checks which antennas actually *are* connected. */
1783         if (priv->chain_noise_data.active_chains)
1784                 active_chains = priv->chain_noise_data.active_chains;
1785         else
1786                 active_chains = priv->hw_params.valid_rx_ant;
1787
1788         if (priv->cfg->bt_params &&
1789             priv->cfg->bt_params->advanced_bt_coexist &&
1790             (priv->bt_full_concurrent ||
1791              priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1792                 /*
1793                  * only use chain 'A' in bt high traffic load or
1794                  * full concurrency mode
1795                  */
1796                 active_chains = first_antenna(active_chains);
1797         }
1798
1799         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1800
1801         /* How many receivers should we use? */
1802         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1803         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1804
1805
1806         /* correct rx chain count according hw settings
1807          * and chain noise calibration
1808          */
1809         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1810         if (valid_rx_cnt < active_rx_cnt)
1811                 active_rx_cnt = valid_rx_cnt;
1812
1813         if (valid_rx_cnt < idle_rx_cnt)
1814                 idle_rx_cnt = valid_rx_cnt;
1815
1816         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1817         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1818
1819         ctx->staging.rx_chain = cpu_to_le16(rx_chain);
1820
1821         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1822                 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1823         else
1824                 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1825
1826         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1827                         ctx->staging.rx_chain,
1828                         active_rx_cnt, idle_rx_cnt);
1829
1830         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1831                 active_rx_cnt < idle_rx_cnt);
1832 }
1833
1834 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
1835 {
1836         int i;
1837         u8 ind = ant;
1838
1839         if (priv->band == IEEE80211_BAND_2GHZ &&
1840             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
1841                 return 0;
1842
1843         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
1844                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
1845                 if (valid & BIT(ind))
1846                         return ind;
1847         }
1848         return ant;
1849 }
1850
1851 static const char *get_csr_string(int cmd)
1852 {
1853         switch (cmd) {
1854         IWL_CMD(CSR_HW_IF_CONFIG_REG);
1855         IWL_CMD(CSR_INT_COALESCING);
1856         IWL_CMD(CSR_INT);
1857         IWL_CMD(CSR_INT_MASK);
1858         IWL_CMD(CSR_FH_INT_STATUS);
1859         IWL_CMD(CSR_GPIO_IN);
1860         IWL_CMD(CSR_RESET);
1861         IWL_CMD(CSR_GP_CNTRL);
1862         IWL_CMD(CSR_HW_REV);
1863         IWL_CMD(CSR_EEPROM_REG);
1864         IWL_CMD(CSR_EEPROM_GP);
1865         IWL_CMD(CSR_OTP_GP_REG);
1866         IWL_CMD(CSR_GIO_REG);
1867         IWL_CMD(CSR_GP_UCODE_REG);
1868         IWL_CMD(CSR_GP_DRIVER_REG);
1869         IWL_CMD(CSR_UCODE_DRV_GP1);
1870         IWL_CMD(CSR_UCODE_DRV_GP2);
1871         IWL_CMD(CSR_LED_REG);
1872         IWL_CMD(CSR_DRAM_INT_TBL_REG);
1873         IWL_CMD(CSR_GIO_CHICKEN_BITS);
1874         IWL_CMD(CSR_ANA_PLL_CFG);
1875         IWL_CMD(CSR_HW_REV_WA_REG);
1876         IWL_CMD(CSR_DBG_HPET_MEM_REG);
1877         default:
1878                 return "UNKNOWN";
1879         }
1880 }
1881
1882 void iwl_dump_csr(struct iwl_priv *priv)
1883 {
1884         int i;
1885         static const u32 csr_tbl[] = {
1886                 CSR_HW_IF_CONFIG_REG,
1887                 CSR_INT_COALESCING,
1888                 CSR_INT,
1889                 CSR_INT_MASK,
1890                 CSR_FH_INT_STATUS,
1891                 CSR_GPIO_IN,
1892                 CSR_RESET,
1893                 CSR_GP_CNTRL,
1894                 CSR_HW_REV,
1895                 CSR_EEPROM_REG,
1896                 CSR_EEPROM_GP,
1897                 CSR_OTP_GP_REG,
1898                 CSR_GIO_REG,
1899                 CSR_GP_UCODE_REG,
1900                 CSR_GP_DRIVER_REG,
1901                 CSR_UCODE_DRV_GP1,
1902                 CSR_UCODE_DRV_GP2,
1903                 CSR_LED_REG,
1904                 CSR_DRAM_INT_TBL_REG,
1905                 CSR_GIO_CHICKEN_BITS,
1906                 CSR_ANA_PLL_CFG,
1907                 CSR_HW_REV_WA_REG,
1908                 CSR_DBG_HPET_MEM_REG
1909         };
1910         IWL_ERR(priv, "CSR values:\n");
1911         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
1912                 "CSR_INT_PERIODIC_REG)\n");
1913         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
1914                 IWL_ERR(priv, "  %25s: 0X%08x\n",
1915                         get_csr_string(csr_tbl[i]),
1916                         iwl_read32(priv, csr_tbl[i]));
1917         }
1918 }
1919
1920 static const char *get_fh_string(int cmd)
1921 {
1922         switch (cmd) {
1923         IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
1924         IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
1925         IWL_CMD(FH_RSCSR_CHNL0_WPTR);
1926         IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
1927         IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
1928         IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
1929         IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1930         IWL_CMD(FH_TSSR_TX_STATUS_REG);
1931         IWL_CMD(FH_TSSR_TX_ERROR_REG);
1932         default:
1933                 return "UNKNOWN";
1934         }
1935 }
1936
1937 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
1938 {
1939         int i;
1940 #ifdef CONFIG_IWLWIFI_DEBUG
1941         int pos = 0;
1942         size_t bufsz = 0;
1943 #endif
1944         static const u32 fh_tbl[] = {
1945                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
1946                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
1947                 FH_RSCSR_CHNL0_WPTR,
1948                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
1949                 FH_MEM_RSSR_SHARED_CTRL_REG,
1950                 FH_MEM_RSSR_RX_STATUS_REG,
1951                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1952                 FH_TSSR_TX_STATUS_REG,
1953                 FH_TSSR_TX_ERROR_REG
1954         };
1955 #ifdef CONFIG_IWLWIFI_DEBUG
1956         if (display) {
1957                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1958                 *buf = kmalloc(bufsz, GFP_KERNEL);
1959                 if (!*buf)
1960                         return -ENOMEM;
1961                 pos += scnprintf(*buf + pos, bufsz - pos,
1962                                 "FH register values:\n");
1963                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1964                         pos += scnprintf(*buf + pos, bufsz - pos,
1965                                 "  %34s: 0X%08x\n",
1966                                 get_fh_string(fh_tbl[i]),
1967                                 iwl_read_direct32(priv, fh_tbl[i]));
1968                 }
1969                 return pos;
1970         }
1971 #endif
1972         IWL_ERR(priv, "FH register values:\n");
1973         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
1974                 IWL_ERR(priv, "  %34s: 0X%08x\n",
1975                         get_fh_string(fh_tbl[i]),
1976                         iwl_read_direct32(priv, fh_tbl[i]));
1977         }
1978         return 0;
1979 }
1980
1981 /* notification wait support */
1982 void iwlagn_init_notification_wait(struct iwl_priv *priv,
1983                                    struct iwl_notification_wait *wait_entry,
1984                                    u8 cmd,
1985                                    void (*fn)(struct iwl_priv *priv,
1986                                               struct iwl_rx_packet *pkt,
1987                                               void *data),
1988                                    void *fn_data)
1989 {
1990         wait_entry->fn = fn;
1991         wait_entry->fn_data = fn_data;
1992         wait_entry->cmd = cmd;
1993         wait_entry->triggered = false;
1994         wait_entry->aborted = false;
1995
1996         spin_lock_bh(&priv->notif_wait_lock);
1997         list_add(&wait_entry->list, &priv->notif_waits);
1998         spin_unlock_bh(&priv->notif_wait_lock);
1999 }
2000
2001 int iwlagn_wait_notification(struct iwl_priv *priv,
2002                              struct iwl_notification_wait *wait_entry,
2003                              unsigned long timeout)
2004 {
2005         int ret;
2006
2007         ret = wait_event_timeout(priv->notif_waitq,
2008                                  wait_entry->triggered || wait_entry->aborted,
2009                                  timeout);
2010
2011         spin_lock_bh(&priv->notif_wait_lock);
2012         list_del(&wait_entry->list);
2013         spin_unlock_bh(&priv->notif_wait_lock);
2014
2015         if (wait_entry->aborted)
2016                 return -EIO;
2017
2018         /* return value is always >= 0 */
2019         if (ret <= 0)
2020                 return -ETIMEDOUT;
2021         return 0;
2022 }
2023
2024 void iwlagn_remove_notification(struct iwl_priv *priv,
2025                                 struct iwl_notification_wait *wait_entry)
2026 {
2027         spin_lock_bh(&priv->notif_wait_lock);
2028         list_del(&wait_entry->list);
2029         spin_unlock_bh(&priv->notif_wait_lock);
2030 }