drivers/net/wireless/iwlwifi/iwl-rx.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  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/etherdevice.h>
  31 #include <linux/slab.h>
  32 #include <linux/sched.h>
  33 #include <net/mac80211.h>
  34 #include <asm/unaligned.h>
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h"
  37 #include "iwl-core.h"
  38 #include "iwl-sta.h"
  39 #include "iwl-io.h"
  40 #include "iwl-helpers.h"
  41 #include "iwl-agn-calib.h"
  42 #include "iwl-agn.h"
  43 #include "iwl-shared.h"
  44
  45 const char *get_cmd_string(u8 cmd)
  46 {
  47         switch (cmd) {
  48                 IWL_CMD(REPLY_ALIVE);
  49                 IWL_CMD(REPLY_ERROR);
  50                 IWL_CMD(REPLY_RXON);
  51                 IWL_CMD(REPLY_RXON_ASSOC);
  52                 IWL_CMD(REPLY_QOS_PARAM);
  53                 IWL_CMD(REPLY_RXON_TIMING);
  54                 IWL_CMD(REPLY_ADD_STA);
  55                 IWL_CMD(REPLY_REMOVE_STA);
  56                 IWL_CMD(REPLY_REMOVE_ALL_STA);
  57                 IWL_CMD(REPLY_TXFIFO_FLUSH);
  58                 IWL_CMD(REPLY_WEPKEY);
  59                 IWL_CMD(REPLY_TX);
  60                 IWL_CMD(REPLY_LEDS_CMD);
  61                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
  62                 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
  63                 IWL_CMD(COEX_MEDIUM_NOTIFICATION);
  64                 IWL_CMD(COEX_EVENT_CMD);
  65                 IWL_CMD(REPLY_QUIET_CMD);
  66                 IWL_CMD(REPLY_CHANNEL_SWITCH);
  67                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
  68                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
  69                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
  70                 IWL_CMD(POWER_TABLE_CMD);
  71                 IWL_CMD(PM_SLEEP_NOTIFICATION);
  72                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
  73                 IWL_CMD(REPLY_SCAN_CMD);
  74                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
  75                 IWL_CMD(SCAN_START_NOTIFICATION);
  76                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
  77                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
  78                 IWL_CMD(BEACON_NOTIFICATION);
  79                 IWL_CMD(REPLY_TX_BEACON);
  80                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
  81                 IWL_CMD(QUIET_NOTIFICATION);
  82                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
  83                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
  84                 IWL_CMD(REPLY_BT_CONFIG);
  85                 IWL_CMD(REPLY_STATISTICS_CMD);
  86                 IWL_CMD(STATISTICS_NOTIFICATION);
  87                 IWL_CMD(REPLY_CARD_STATE_CMD);
  88                 IWL_CMD(CARD_STATE_NOTIFICATION);
  89                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
  90                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
  91                 IWL_CMD(SENSITIVITY_CMD);
  92                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
  93                 IWL_CMD(REPLY_RX_PHY_CMD);
  94                 IWL_CMD(REPLY_RX_MPDU_CMD);
  95                 IWL_CMD(REPLY_RX);
  96                 IWL_CMD(REPLY_COMPRESSED_BA);
  97                 IWL_CMD(CALIBRATION_CFG_CMD);
  98                 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
  99                 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
 100                 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
 101                 IWL_CMD(TEMPERATURE_NOTIFICATION);
 102                 IWL_CMD(TX_ANT_CONFIGURATION_CMD);
 103                 IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF);
 104                 IWL_CMD(REPLY_BT_COEX_PRIO_TABLE);
 105                 IWL_CMD(REPLY_BT_COEX_PROT_ENV);
 106                 IWL_CMD(REPLY_WIPAN_PARAMS);
 107                 IWL_CMD(REPLY_WIPAN_RXON);
 108                 IWL_CMD(REPLY_WIPAN_RXON_TIMING);
 109                 IWL_CMD(REPLY_WIPAN_RXON_ASSOC);
 110                 IWL_CMD(REPLY_WIPAN_QOS_PARAM);
 111                 IWL_CMD(REPLY_WIPAN_WEPKEY);
 112                 IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH);
 113                 IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION);
 114                 IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE);
 115                 IWL_CMD(REPLY_WOWLAN_PATTERNS);
 116                 IWL_CMD(REPLY_WOWLAN_WAKEUP_FILTER);
 117                 IWL_CMD(REPLY_WOWLAN_TSC_RSC_PARAMS);
 118                 IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS);
 119                 IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL);
 120                 IWL_CMD(REPLY_WOWLAN_GET_STATUS);
 121         default:
 122                 return "UNKNOWN";
 123
 124         }
 125 }
 126
 127 /******************************************************************************
 128  *
 129  * Generic RX handler implementations
 130  *
 131  ******************************************************************************/
 132
 133 static void iwl_rx_reply_error(struct iwl_priv *priv,
 134                                struct iwl_rx_mem_buffer *rxb)
 135 {
 136         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 137
 138         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
 139                 "seq 0x%04X ser 0x%08X\n",
 140                 le32_to_cpu(pkt->u.err_resp.error_type),
 141                 get_cmd_string(pkt->u.err_resp.cmd_id),
 142                 pkt->u.err_resp.cmd_id,
 143                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
 144                 le32_to_cpu(pkt->u.err_resp.error_info));
 145 }
 146
 147 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 148 {
 149         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 150         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
 151         /*
 152          * MULTI-FIXME
 153          * See iwl_mac_channel_switch.
 154          */
 155         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 156         struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
 157
 158         if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 159                 return;
 160
 161         if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
 162                 rxon->channel = csa->channel;
 163                 ctx->staging.channel = csa->channel;
 164                 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
 165                               le16_to_cpu(csa->channel));
 166                 iwl_chswitch_done(priv, true);
 167         } else {
 168                 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
 169                         le16_to_cpu(csa->channel));
 170                 iwl_chswitch_done(priv, false);
 171         }
 172 }
 173
 174
 175 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
 176                                           struct iwl_rx_mem_buffer *rxb)
 177 {
 178         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 179         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
 180
 181         if (!report->state) {
 182                 IWL_DEBUG_11H(priv,
 183                         "Spectrum Measure Notification: Start\n");
 184                 return;
 185         }
 186
 187         memcpy(&priv->measure_report, report, sizeof(*report));
 188         priv->measurement_status |= MEASUREMENT_READY;
 189 }
 190
 191 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
 192                                   struct iwl_rx_mem_buffer *rxb)
 193 {
 194 #ifdef CONFIG_IWLWIFI_DEBUG
 195         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 196         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
 197         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
 198                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
 199 #endif
 200 }
 201
 202 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
 203                                              struct iwl_rx_mem_buffer *rxb)
 204 {
 205         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 206         u32 __maybe_unused len =
 207                 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 208         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
 209                         "notification for %s:\n", len,
 210                         get_cmd_string(pkt->hdr.cmd));
 211         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
 212 }
 213
 214 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 215                                 struct iwl_rx_mem_buffer *rxb)
 216 {
 217         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 218         struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
 219 #ifdef CONFIG_IWLWIFI_DEBUG
 220         u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
 221         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 222
 223         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
 224                 "tsf:0x%.8x%.8x rate:%d\n",
 225                 status & TX_STATUS_MSK,
 226                 beacon->beacon_notify_hdr.failure_frame,
 227                 le32_to_cpu(beacon->ibss_mgr_status),
 228                 le32_to_cpu(beacon->high_tsf),
 229                 le32_to_cpu(beacon->low_tsf), rate);
 230 #endif
 231
 232         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 233
 234         if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 235                 queue_work(priv->shrd->workqueue, &priv->beacon_update);
 236 }
 237
 238 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
 239 #define ACK_CNT_RATIO (50)
 240 #define BA_TIMEOUT_CNT (5)
 241 #define BA_TIMEOUT_MAX (16)
 242
 243 /**
 244  * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
 245  *
 246  * When the ACK count ratio is low and aggregated BA timeout retries exceeding
 247  * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
 248  * operation state.
 249  */
 250 static bool iwl_good_ack_health(struct iwl_priv *priv,
 251                                 struct statistics_tx *cur)
 252 {
 253         int actual_delta, expected_delta, ba_timeout_delta;
 254         struct statistics_tx *old;
 255
 256         if (priv->agg_tids_count)
 257                 return true;
 258
 259         old = &priv->statistics.tx;
 260
 261         actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
 262                        le32_to_cpu(old->actual_ack_cnt);
 263         expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
 264                          le32_to_cpu(old->expected_ack_cnt);
 265
 266         /* Values should not be negative, but we do not trust the firmware */
 267         if (actual_delta <= 0 || expected_delta <= 0)
 268                 return true;
 269
 270         ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
 271                            le32_to_cpu(old->agg.ba_timeout);
 272
 273         if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
 274             ba_timeout_delta > BA_TIMEOUT_CNT) {
 275                 IWL_DEBUG_RADIO(priv, "deltas: actual %d expected %d ba_timeout %d\n",
 276                                 actual_delta, expected_delta, ba_timeout_delta);
 277
 278 #ifdef CONFIG_IWLWIFI_DEBUGFS
 279                 /*
 280                  * This is ifdef'ed on DEBUGFS because otherwise the
 281                  * statistics aren't available. If DEBUGFS is set but
 282                  * DEBUG is not, these will just compile out.
 283                  */
 284                 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
 285                                 priv->delta_stats.tx.rx_detected_cnt);
 286                 IWL_DEBUG_RADIO(priv,
 287                                 "ack_or_ba_timeout_collision delta %d\n",
 288                                 priv->delta_stats.tx.ack_or_ba_timeout_collision);
 289 #endif
 290
 291                 if (ba_timeout_delta >= BA_TIMEOUT_MAX)
 292                         return false;
 293         }
 294
 295         return true;
 296 }
 297
 298 /**
 299  * iwl_good_plcp_health - checks for plcp error.
 300  *
 301  * When the plcp error is exceeding the thresholds, reset the radio
 302  * to improve the throughput.
 303  */
 304 static bool iwl_good_plcp_health(struct iwl_priv *priv,
 305                                  struct statistics_rx_phy *cur_ofdm,
 306                                  struct statistics_rx_ht_phy *cur_ofdm_ht,
 307                                  unsigned int msecs)
 308 {
 309         int delta;
 310         int threshold = priv->cfg->base_params->plcp_delta_threshold;
 311
 312         if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
 313                 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
 314                 return true;
 315         }
 316
 317         delta = le32_to_cpu(cur_ofdm->plcp_err) -
 318                 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
 319                 le32_to_cpu(cur_ofdm_ht->plcp_err) -
 320                 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
 321
 322         /* Can be negative if firmware reset statistics */
 323         if (delta <= 0)
 324                 return true;
 325
 326         if ((delta * 100 / msecs) > threshold) {
 327                 IWL_DEBUG_RADIO(priv,
 328                                 "plcp health threshold %u delta %d msecs %u\n",
 329                                 threshold, delta, msecs);
 330                 return false;
 331         }
 332
 333         return true;
 334 }
 335
 336 static void iwl_recover_from_statistics(struct iwl_priv *priv,
 337                                         struct statistics_rx_phy *cur_ofdm,
 338                                         struct statistics_rx_ht_phy *cur_ofdm_ht,
 339                                         struct statistics_tx *tx,
 340                                         unsigned long stamp)
 341 {
 342         unsigned int msecs;
 343
 344         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 345                 return;
 346
 347         msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
 348
 349         /* Only gather statistics and update time stamp when not associated */
 350         if (!iwl_is_any_associated(priv))
 351                 return;
 352
 353         /* Do not check/recover when do not have enough statistics data */
 354         if (msecs < 99)
 355                 return;
 356
 357         if (iwlagn_mod_params.ack_check && !iwl_good_ack_health(priv, tx)) {
 358                 IWL_ERR(priv, "low ack count detected, restart firmware\n");
 359                 if (!iwl_force_reset(priv, IWL_FW_RESET, false))
 360                         return;
 361         }
 362
 363         if (iwlagn_mod_params.plcp_check &&
 364             !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
 365                 iwl_force_reset(priv, IWL_RF_RESET, false);
 366 }
 367
 368 /* Calculate noise level, based on measurements during network silence just
 369  *   before arriving beacon.  This measurement can be done only if we know
 370  *   exactly when to expect beacons, therefore only when we're associated. */
 371 static void iwl_rx_calc_noise(struct iwl_priv *priv)
 372 {
 373         struct statistics_rx_non_phy *rx_info;
 374         int num_active_rx = 0;
 375         int total_silence = 0;
 376         int bcn_silence_a, bcn_silence_b, bcn_silence_c;
 377         int last_rx_noise;
 378
 379         rx_info = &priv->statistics.rx_non_phy;
 380
 381         bcn_silence_a =
 382                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
 383         bcn_silence_b =
 384                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
 385         bcn_silence_c =
 386                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
 387
 388         if (bcn_silence_a) {
 389                 total_silence += bcn_silence_a;
 390                 num_active_rx++;
 391         }
 392         if (bcn_silence_b) {
 393                 total_silence += bcn_silence_b;
 394                 num_active_rx++;
 395         }
 396         if (bcn_silence_c) {
 397                 total_silence += bcn_silence_c;
 398                 num_active_rx++;
 399         }
 400
 401         /* Average among active antennas */
 402         if (num_active_rx)
 403                 last_rx_noise = (total_silence / num_active_rx) - 107;
 404         else
 405                 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 406
 407         IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
 408                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
 409                         last_rx_noise);
 410 }
 411
 412 #ifdef CONFIG_IWLWIFI_DEBUGFS
 413 /*
 414  *  based on the assumption of all statistics counter are in DWORD
 415  *  FIXME: This function is for debugging, do not deal with
 416  *  the case of counters roll-over.
 417  */
 418 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
 419                         __le32 *max_delta, __le32 *accum, int size)
 420 {
 421         int i;
 422
 423         for (i = 0;
 424              i < size / sizeof(__le32);
 425              i++, prev++, cur++, delta++, max_delta++, accum++) {
 426                 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
 427                         *delta = cpu_to_le32(
 428                                 le32_to_cpu(*cur) - le32_to_cpu(*prev));
 429                         le32_add_cpu(accum, le32_to_cpu(*delta));
 430                         if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
 431                                 *max_delta = *delta;
 432                 }
 433         }
 434 }
 435
 436 static void
 437 iwl_accumulative_statistics(struct iwl_priv *priv,
 438                             struct statistics_general_common *common,
 439                             struct statistics_rx_non_phy *rx_non_phy,
 440                             struct statistics_rx_phy *rx_ofdm,
 441                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 442                             struct statistics_rx_phy *rx_cck,
 443                             struct statistics_tx *tx,
 444                             struct statistics_bt_activity *bt_activity)
 445 {
 446 #define ACCUM(_name)    \
 447         accum_stats((__le32 *)&priv->statistics._name,          \
 448                     (__le32 *)_name,                            \
 449                     (__le32 *)&priv->delta_stats._name,         \
 450                     (__le32 *)&priv->max_delta_stats._name,     \
 451                     (__le32 *)&priv->accum_stats._name,         \
 452                     sizeof(*_name));
 453
 454         ACCUM(common);
 455         ACCUM(rx_non_phy);
 456         ACCUM(rx_ofdm);
 457         ACCUM(rx_ofdm_ht);
 458         ACCUM(rx_cck);
 459         ACCUM(tx);
 460         if (bt_activity)
 461                 ACCUM(bt_activity);
 462 #undef ACCUM
 463 }
 464 #else
 465 static inline void
 466 iwl_accumulative_statistics(struct iwl_priv *priv,
 467                             struct statistics_general_common *common,
 468                             struct statistics_rx_non_phy *rx_non_phy,
 469                             struct statistics_rx_phy *rx_ofdm,
 470                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 471                             struct statistics_rx_phy *rx_cck,
 472                             struct statistics_tx *tx,
 473                             struct statistics_bt_activity *bt_activity)
 474 {
 475 }
 476 #endif
 477
 478 static void iwl_rx_statistics(struct iwl_priv *priv,
 479                               struct iwl_rx_mem_buffer *rxb)
 480 {
 481         unsigned long stamp = jiffies;
 482         const int reg_recalib_period = 60;
 483         int change;
 484         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 485         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 486         __le32 *flag;
 487         struct statistics_general_common *common;
 488         struct statistics_rx_non_phy *rx_non_phy;
 489         struct statistics_rx_phy *rx_ofdm;
 490         struct statistics_rx_ht_phy *rx_ofdm_ht;
 491         struct statistics_rx_phy *rx_cck;
 492         struct statistics_tx *tx;
 493         struct statistics_bt_activity *bt_activity;
 494
 495         len -= sizeof(struct iwl_cmd_header); /* skip header */
 496
 497         IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
 498                      len);
 499
 500         if (len == sizeof(struct iwl_bt_notif_statistics)) {
 501                 struct iwl_bt_notif_statistics *stats;
 502                 stats = &pkt->u.stats_bt;
 503                 flag = &stats->flag;
 504                 common = &stats->general.common;
 505                 rx_non_phy = &stats->rx.general.common;
 506                 rx_ofdm = &stats->rx.ofdm;
 507                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 508                 rx_cck = &stats->rx.cck;
 509                 tx = &stats->tx;
 510                 bt_activity = &stats->general.activity;
 511
 512 #ifdef CONFIG_IWLWIFI_DEBUGFS
 513                 /* handle this exception directly */
 514                 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
 515                 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
 516                              le32_to_cpu(stats->rx.general.num_bt_kills));
 517 #endif
 518         } else if (len == sizeof(struct iwl_notif_statistics)) {
 519                 struct iwl_notif_statistics *stats;
 520                 stats = &pkt->u.stats;
 521                 flag = &stats->flag;
 522                 common = &stats->general.common;
 523                 rx_non_phy = &stats->rx.general;
 524                 rx_ofdm = &stats->rx.ofdm;
 525                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 526                 rx_cck = &stats->rx.cck;
 527                 tx = &stats->tx;
 528                 bt_activity = NULL;
 529         } else {
 530                 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
 531                           len, sizeof(struct iwl_bt_notif_statistics),
 532                           sizeof(struct iwl_notif_statistics));
 533                 return;
 534         }
 535
 536         change = common->temperature != priv->statistics.common.temperature ||
 537                  (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
 538                  (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
 539
 540         iwl_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
 541                                     rx_ofdm_ht, rx_cck, tx, bt_activity);
 542
 543         iwl_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
 544
 545         priv->statistics.flag = *flag;
 546         memcpy(&priv->statistics.common, common, sizeof(*common));
 547         memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
 548         memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
 549         memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
 550         memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
 551         memcpy(&priv->statistics.tx, tx, sizeof(*tx));
 552 #ifdef CONFIG_IWLWIFI_DEBUGFS
 553         if (bt_activity)
 554                 memcpy(&priv->statistics.bt_activity, bt_activity,
 555                         sizeof(*bt_activity));
 556 #endif
 557
 558         priv->rx_statistics_jiffies = stamp;
 559
 560         set_bit(STATUS_STATISTICS, &priv->shrd->status);
 561
 562         /* Reschedule the statistics timer to occur in
 563          * reg_recalib_period seconds to ensure we get a
 564          * thermal update even if the uCode doesn't give
 565          * us one */
 566         mod_timer(&priv->statistics_periodic, jiffies +
 567                   msecs_to_jiffies(reg_recalib_period * 1000));
 568
 569         if (unlikely(!test_bit(STATUS_SCANNING, &priv->shrd->status)) &&
 570             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
 571                 iwl_rx_calc_noise(priv);
 572                 queue_work(priv->shrd->workqueue, &priv->run_time_calib_work);
 573         }
 574         if (priv->cfg->lib->temperature && change)
 575                 priv->cfg->lib->temperature(priv);
 576 }
 577
 578 static void iwl_rx_reply_statistics(struct iwl_priv *priv,
 579                                     struct iwl_rx_mem_buffer *rxb)
 580 {
 581         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 582
 583         if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
 584 #ifdef CONFIG_IWLWIFI_DEBUGFS
 585                 memset(&priv->accum_stats, 0,
 586                         sizeof(priv->accum_stats));
 587                 memset(&priv->delta_stats, 0,
 588                         sizeof(priv->delta_stats));
 589                 memset(&priv->max_delta_stats, 0,
 590                         sizeof(priv->max_delta_stats));
 591 #endif
 592                 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
 593         }
 594         iwl_rx_statistics(priv, rxb);
 595 }
 596
 597 /* Handle notification from uCode that card's power state is changing
 598  * due to software, hardware, or critical temperature RFKILL */
 599 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 600                                     struct iwl_rx_mem_buffer *rxb)
 601 {
 602         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 603         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 604         unsigned long status = priv->shrd->status;
 605
 606         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 607                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 608                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 609                           (flags & CT_CARD_DISABLED) ?
 610                           "Reached" : "Not reached");
 611
 612         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 613                      CT_CARD_DISABLED)) {
 614
 615                 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 616                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 617
 618                 iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
 619                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 620
 621                 if (!(flags & RXON_CARD_DISABLED)) {
 622                         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 623                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 624                         iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
 625                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 626                 }
 627                 if (flags & CT_CARD_DISABLED)
 628                         iwl_tt_enter_ct_kill(priv);
 629         }
 630         if (!(flags & CT_CARD_DISABLED))
 631                 iwl_tt_exit_ct_kill(priv);
 632
 633         if (flags & HW_CARD_DISABLED)
 634                 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
 635         else
 636                 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
 637
 638
 639         if (!(flags & RXON_CARD_DISABLED))
 640                 iwl_scan_cancel(priv);
 641
 642         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 643              test_bit(STATUS_RF_KILL_HW, &priv->shrd->status)))
 644                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 645                         test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
 646         else
 647                 wake_up_interruptible(&priv->shrd->wait_command_queue);
 648 }
 649
 650 static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
 651                                        struct iwl_rx_mem_buffer *rxb)
 652
 653 {
 654         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 655         struct iwl_missed_beacon_notif *missed_beacon;
 656
 657         missed_beacon = &pkt->u.missed_beacon;
 658         if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
 659             priv->missed_beacon_threshold) {
 660                 IWL_DEBUG_CALIB(priv,
 661                     "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
 662                     le32_to_cpu(missed_beacon->consecutive_missed_beacons),
 663                     le32_to_cpu(missed_beacon->total_missed_becons),
 664                     le32_to_cpu(missed_beacon->num_recvd_beacons),
 665                     le32_to_cpu(missed_beacon->num_expected_beacons));
 666                 if (!test_bit(STATUS_SCANNING, &priv->shrd->status))
 667                         iwl_init_sensitivity(priv);
 668         }
 669 }
 670
 671 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
 672  * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
 673 static void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
 674                                 struct iwl_rx_mem_buffer *rxb)
 675 {
 676         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 677
 678         priv->last_phy_res_valid = true;
 679         memcpy(&priv->last_phy_res, pkt->u.raw,
 680                sizeof(struct iwl_rx_phy_res));
 681 }
 682
 683 /*
 684  * returns non-zero if packet should be dropped
 685  */
 686 static int iwl_set_decrypted_flag(struct iwl_priv *priv,
 687                                   struct ieee80211_hdr *hdr,
 688                                   u32 decrypt_res,
 689                                   struct ieee80211_rx_status *stats)
 690 {
 691         u16 fc = le16_to_cpu(hdr->frame_control);
 692
 693         /*
 694          * All contexts have the same setting here due to it being
 695          * a module parameter, so OK to check any context.
 696          */
 697         if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
 698                                                 RXON_FILTER_DIS_DECRYPT_MSK)
 699                 return 0;
 700
 701         if (!(fc & IEEE80211_FCTL_PROTECTED))
 702                 return 0;
 703
 704         IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
 705         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
 706         case RX_RES_STATUS_SEC_TYPE_TKIP:
 707                 /* The uCode has got a bad phase 1 Key, pushes the packet.
 708                  * Decryption will be done in SW. */
 709                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 710                     RX_RES_STATUS_BAD_KEY_TTAK)
 711                         break;
 712
 713         case RX_RES_STATUS_SEC_TYPE_WEP:
 714                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 715                     RX_RES_STATUS_BAD_ICV_MIC) {
 716                         /* bad ICV, the packet is destroyed since the
 717                          * decryption is inplace, drop it */
 718                         IWL_DEBUG_RX(priv, "Packet destroyed\n");
 719                         return -1;
 720                 }
 721         case RX_RES_STATUS_SEC_TYPE_CCMP:
 722                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 723                     RX_RES_STATUS_DECRYPT_OK) {
 724                         IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
 725                         stats->flag |= RX_FLAG_DECRYPTED;
 726                 }
 727                 break;
 728
 729         default:
 730                 break;
 731         }
 732         return 0;
 733 }
 734
 735 static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
 736                                         struct ieee80211_hdr *hdr,
 737                                         u16 len,
 738                                         u32 ampdu_status,
 739                                         struct iwl_rx_mem_buffer *rxb,
 740                                         struct ieee80211_rx_status *stats)
 741 {
 742         struct sk_buff *skb;
 743         __le16 fc = hdr->frame_control;
 744         struct iwl_rxon_context *ctx;
 745
 746         /* We only process data packets if the interface is open */
 747         if (unlikely(!priv->is_open)) {
 748                 IWL_DEBUG_DROP_LIMIT(priv,
 749                     "Dropping packet while interface is not open.\n");
 750                 return;
 751         }
 752
 753         /* In case of HW accelerated crypto and bad decryption, drop */
 754         if (!iwlagn_mod_params.sw_crypto &&
 755             iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
 756                 return;
 757
 758         skb = dev_alloc_skb(128);
 759         if (!skb) {
 760                 IWL_ERR(priv, "dev_alloc_skb failed\n");
 761                 return;
 762         }
 763
 764         skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
 765
 766         iwl_update_stats(priv, false, fc, len);
 767
 768         /*
 769         * Wake any queues that were stopped due to a passive channel tx
 770         * failure. This can happen because the regulatory enforcement in
 771         * the device waits for a beacon before allowing transmission,
 772         * sometimes even after already having transmitted frames for the
 773         * association because the new RXON may reset the information.
 774         */
 775         if (unlikely(ieee80211_is_beacon(fc))) {
 776                 for_each_context(priv, ctx) {
 777                         if (!ctx->last_tx_rejected)
 778                                 continue;
 779                         if (compare_ether_addr(hdr->addr3,
 780                                                ctx->active.bssid_addr))
 781                                 continue;
 782                         ctx->last_tx_rejected = false;
 783                         iwl_trans_wake_any_queue(trans(priv), ctx->ctxid);
 784                 }
 785         }
 786
 787         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 788
 789         ieee80211_rx(priv->hw, skb);
 790         rxb->page = NULL;
 791 }
 792
 793 static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
 794 {
 795         u32 decrypt_out = 0;
 796
 797         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
 798                                         RX_RES_STATUS_STATION_FOUND)
 799                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
 800                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
 801
 802         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
 803
 804         /* packet was not encrypted */
 805         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 806                                         RX_RES_STATUS_SEC_TYPE_NONE)
 807                 return decrypt_out;
 808
 809         /* packet was encrypted with unknown alg */
 810         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 811                                         RX_RES_STATUS_SEC_TYPE_ERR)
 812                 return decrypt_out;
 813
 814         /* decryption was not done in HW */
 815         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
 816                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
 817                 return decrypt_out;
 818
 819         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
 820
 821         case RX_RES_STATUS_SEC_TYPE_CCMP:
 822                 /* alg is CCM: check MIC only */
 823                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
 824                         /* Bad MIC */
 825                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 826                 else
 827                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 828
 829                 break;
 830
 831         case RX_RES_STATUS_SEC_TYPE_TKIP:
 832                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
 833                         /* Bad TTAK */
 834                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
 835                         break;
 836                 }
 837                 /* fall through if TTAK OK */
 838         default:
 839                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
 840                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 841                 else
 842                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 843                 break;
 844         }
 845
 846         IWL_DEBUG_RX(priv, "decrypt_in:0x%x  decrypt_out = 0x%x\n",
 847                                         decrypt_in, decrypt_out);
 848
 849         return decrypt_out;
 850 }
 851
 852 /* Calc max signal level (dBm) among 3 possible receivers */
 853 static int iwlagn_calc_rssi(struct iwl_priv *priv,
 854                              struct iwl_rx_phy_res *rx_resp)
 855 {
 856         /* data from PHY/DSP regarding signal strength, etc.,
 857          *   contents are always there, not configurable by host
 858          */
 859         struct iwlagn_non_cfg_phy *ncphy =
 860                 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
 861         u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
 862         u8 agc;
 863
 864         val  = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
 865         agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
 866
 867         /* Find max rssi among 3 possible receivers.
 868          * These values are measured by the digital signal processor (DSP).
 869          * They should stay fairly constant even as the signal strength varies,
 870          *   if the radio's automatic gain control (AGC) is working right.
 871          * AGC value (see below) will provide the "interesting" info.
 872          */
 873         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
 874         rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
 875                 IWLAGN_OFDM_RSSI_A_BIT_POS;
 876         rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
 877                 IWLAGN_OFDM_RSSI_B_BIT_POS;
 878         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
 879         rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
 880                 IWLAGN_OFDM_RSSI_C_BIT_POS;
 881
 882         max_rssi = max_t(u32, rssi_a, rssi_b);
 883         max_rssi = max_t(u32, max_rssi, rssi_c);
 884
 885         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
 886                 rssi_a, rssi_b, rssi_c, max_rssi, agc);
 887
 888         /* dBm = max_rssi dB - agc dB - constant.
 889          * Higher AGC (higher radio gain) means lower signal. */
 890         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
 891 }
 892
 893 /* Called for REPLY_RX (legacy ABG frames), or
 894  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
 895 static void iwl_rx_reply_rx(struct iwl_priv *priv,
 896                             struct iwl_rx_mem_buffer *rxb)
 897 {
 898         struct ieee80211_hdr *header;
 899         struct ieee80211_rx_status rx_status;
 900         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 901         struct iwl_rx_phy_res *phy_res;
 902         __le32 rx_pkt_status;
 903         struct iwl_rx_mpdu_res_start *amsdu;
 904         u32 len;
 905         u32 ampdu_status;
 906         u32 rate_n_flags;
 907
 908         /**
 909          * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
 910          *      REPLY_RX: physical layer info is in this buffer
 911          *      REPLY_RX_MPDU_CMD: physical layer info was sent in separate
 912          *              command and cached in priv->last_phy_res
 913          *
 914          * Here we set up local variables depending on which command is
 915          * received.
 916          */
 917         if (pkt->hdr.cmd == REPLY_RX) {
 918                 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
 919                 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
 920                                 + phy_res->cfg_phy_cnt);
 921
 922                 len = le16_to_cpu(phy_res->byte_count);
 923                 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
 924                                 phy_res->cfg_phy_cnt + len);
 925                 ampdu_status = le32_to_cpu(rx_pkt_status);
 926         } else {
 927                 if (!priv->last_phy_res_valid) {
 928                         IWL_ERR(priv, "MPDU frame without cached PHY data\n");
 929                         return;
 930                 }
 931                 phy_res = &priv->last_phy_res;
 932                 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
 933                 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
 934                 len = le16_to_cpu(amsdu->byte_count);
 935                 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
 936                 ampdu_status = iwl_translate_rx_status(priv,
 937                                                 le32_to_cpu(rx_pkt_status));
 938         }
 939
 940         if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
 941                 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
 942                                 phy_res->cfg_phy_cnt);
 943                 return;
 944         }
 945
 946         if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
 947             !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 948                 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
 949                                 le32_to_cpu(rx_pkt_status));
 950                 return;
 951         }
 952
 953         /* This will be used in several places later */
 954         rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
 955
 956         /* rx_status carries information about the packet to mac80211 */
 957         rx_status.mactime = le64_to_cpu(phy_res->timestamp);
 958         rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 959                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 960         rx_status.freq =
 961                 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
 962                                                rx_status.band);
 963         rx_status.rate_idx =
 964                 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
 965         rx_status.flag = 0;
 966
 967         /* TSF isn't reliable. In order to allow smooth user experience,
 968          * this W/A doesn't propagate it to the mac80211 */
 969         /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
 970
 971         priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
 972
 973         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
 974         rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
 975
 976         iwl_dbg_log_rx_data_frame(priv, len, header);
 977         IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
 978                 rx_status.signal, (unsigned long long)rx_status.mactime);
 979
 980         /*
 981          * "antenna number"
 982          *
 983          * It seems that the antenna field in the phy flags value
 984          * is actually a bit field. This is undefined by radiotap,
 985          * it wants an actual antenna number but I always get "7"
 986          * for most legacy frames I receive indicating that the
 987          * same frame was received on all three RX chains.
 988          *
 989          * I think this field should be removed in favor of a
 990          * new 802.11n radiotap field "RX chains" that is defined
 991          * as a bitmask.
 992          */
 993         rx_status.antenna =
 994                 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
 995                 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 996
 997         /* set the preamble flag if appropriate */
 998         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 999                 rx_status.flag |= RX_FLAG_SHORTPRE;
1000
1001         /* Set up the HT phy flags */
1002         if (rate_n_flags & RATE_MCS_HT_MSK)
1003                 rx_status.flag |= RX_FLAG_HT;
1004         if (rate_n_flags & RATE_MCS_HT40_MSK)
1005                 rx_status.flag |= RX_FLAG_40MHZ;
1006         if (rate_n_flags & RATE_MCS_SGI_MSK)
1007                 rx_status.flag |= RX_FLAG_SHORT_GI;
1008
1009         iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1010                                     rxb, &rx_status);
1011 }
1012
1013 /**
1014  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1015  *
1016  * Setup the RX handlers for each of the reply types sent from the uCode
1017  * to the host.
1018  */
1019 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1020 {
1021         void (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
1022
1023         handlers = priv->rx_handlers;
1024
1025         handlers[REPLY_ERROR]                   = iwl_rx_reply_error;
1026         handlers[CHANNEL_SWITCH_NOTIFICATION]   = iwl_rx_csa;
1027         handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif;
1028         handlers[PM_SLEEP_NOTIFICATION]         = iwl_rx_pm_sleep_notif;
1029         handlers[PM_DEBUG_STATISTIC_NOTIFIC]    = iwl_rx_pm_debug_statistics_notif;
1030         handlers[BEACON_NOTIFICATION]           = iwl_rx_beacon_notif;
1031
1032         /*
1033          * The same handler is used for both the REPLY to a discrete
1034          * statistics request from the host as well as for the periodic
1035          * statistics notifications (after received beacons) from the uCode.
1036          */
1037         handlers[REPLY_STATISTICS_CMD]          = iwl_rx_reply_statistics;
1038         handlers[STATISTICS_NOTIFICATION]       = iwl_rx_statistics;
1039
1040         iwl_setup_rx_scan_handlers(priv);
1041
1042         handlers[CARD_STATE_NOTIFICATION]       = iwl_rx_card_state_notif;
1043         handlers[MISSED_BEACONS_NOTIFICATION]   = iwl_rx_missed_beacon_notif;
1044
1045         /* Rx handlers */
1046         handlers[REPLY_RX_PHY_CMD]              = iwl_rx_reply_rx_phy;
1047         handlers[REPLY_RX_MPDU_CMD]             = iwl_rx_reply_rx;
1048
1049         /* block ack */
1050         handlers[REPLY_COMPRESSED_BA]           = iwlagn_rx_reply_compressed_ba;
1051
1052         /* init calibration handlers */
1053         priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
1054                                         iwlagn_rx_calib_result;
1055         priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1056
1057         /* set up notification wait support */
1058         spin_lock_init(&priv->notif_wait_lock);
1059         INIT_LIST_HEAD(&priv->notif_waits);
1060         init_waitqueue_head(&priv->notif_waitq);
1061
1062         /* Set up BT Rx handlers */
1063         if (priv->cfg->lib->bt_rx_handler_setup)
1064                 priv->cfg->lib->bt_rx_handler_setup(priv);
1065
1066 }
1067
1068 void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1069 {
1070         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1071
1072         /*
1073          * Do the notification wait before RX handlers so
1074          * even if the RX handler consumes the RXB we have
1075          * access to it in the notification wait entry.
1076          */
1077         if (!list_empty(&priv->notif_waits)) {
1078                 struct iwl_notification_wait *w;
1079
1080                 spin_lock(&priv->notif_wait_lock);
1081                 list_for_each_entry(w, &priv->notif_waits, list) {
1082                         if (w->cmd != pkt->hdr.cmd)
1083                                 continue;
1084                         IWL_DEBUG_RX(priv,
1085                                 "Notif: %s, 0x%02x - wake the callers up\n",
1086                                 get_cmd_string(pkt->hdr.cmd),
1087                                 pkt->hdr.cmd);
1088                         w->triggered = true;
1089                         if (w->fn)
1090                                 w->fn(priv, pkt, w->fn_data);
1091                 }
1092                 spin_unlock(&priv->notif_wait_lock);
1093
1094                 wake_up_all(&priv->notif_waitq);
1095         }
1096
1097         if (priv->pre_rx_handler)
1098                 priv->pre_rx_handler(priv, rxb);
1099
1100         /* Based on type of command response or notification,
1101          *   handle those that need handling via function in
1102          *   rx_handlers table.  See iwl_setup_rx_handlers() */
1103         if (priv->rx_handlers[pkt->hdr.cmd]) {
1104                 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1105                 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1106         } else {
1107                 /* No handling needed */
1108                 IWL_DEBUG_RX(priv,
1109                         "No handler needed for %s, 0x%02x\n",
1110                         get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1111         }
1112 }