kernel/drivers/net/wireless/iwlwifi/dvm/rx.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portionhelp 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-io.h"
  36 #include "dev.h"
  37 #include "calib.h"
  38 #include "agn.h"
  39
  40 #define IWL_CMD_ENTRY(x) [x] = #x
  41
  42 const char *const iwl_dvm_cmd_strings[REPLY_MAX] = {
  43         IWL_CMD_ENTRY(REPLY_ALIVE),
  44         IWL_CMD_ENTRY(REPLY_ERROR),
  45         IWL_CMD_ENTRY(REPLY_ECHO),
  46         IWL_CMD_ENTRY(REPLY_RXON),
  47         IWL_CMD_ENTRY(REPLY_RXON_ASSOC),
  48         IWL_CMD_ENTRY(REPLY_QOS_PARAM),
  49         IWL_CMD_ENTRY(REPLY_RXON_TIMING),
  50         IWL_CMD_ENTRY(REPLY_ADD_STA),
  51         IWL_CMD_ENTRY(REPLY_REMOVE_STA),
  52         IWL_CMD_ENTRY(REPLY_REMOVE_ALL_STA),
  53         IWL_CMD_ENTRY(REPLY_TXFIFO_FLUSH),
  54         IWL_CMD_ENTRY(REPLY_WEPKEY),
  55         IWL_CMD_ENTRY(REPLY_TX),
  56         IWL_CMD_ENTRY(REPLY_LEDS_CMD),
  57         IWL_CMD_ENTRY(REPLY_TX_LINK_QUALITY_CMD),
  58         IWL_CMD_ENTRY(COEX_PRIORITY_TABLE_CMD),
  59         IWL_CMD_ENTRY(COEX_MEDIUM_NOTIFICATION),
  60         IWL_CMD_ENTRY(COEX_EVENT_CMD),
  61         IWL_CMD_ENTRY(REPLY_QUIET_CMD),
  62         IWL_CMD_ENTRY(REPLY_CHANNEL_SWITCH),
  63         IWL_CMD_ENTRY(CHANNEL_SWITCH_NOTIFICATION),
  64         IWL_CMD_ENTRY(REPLY_SPECTRUM_MEASUREMENT_CMD),
  65         IWL_CMD_ENTRY(SPECTRUM_MEASURE_NOTIFICATION),
  66         IWL_CMD_ENTRY(POWER_TABLE_CMD),
  67         IWL_CMD_ENTRY(PM_SLEEP_NOTIFICATION),
  68         IWL_CMD_ENTRY(PM_DEBUG_STATISTIC_NOTIFIC),
  69         IWL_CMD_ENTRY(REPLY_SCAN_CMD),
  70         IWL_CMD_ENTRY(REPLY_SCAN_ABORT_CMD),
  71         IWL_CMD_ENTRY(SCAN_START_NOTIFICATION),
  72         IWL_CMD_ENTRY(SCAN_RESULTS_NOTIFICATION),
  73         IWL_CMD_ENTRY(SCAN_COMPLETE_NOTIFICATION),
  74         IWL_CMD_ENTRY(BEACON_NOTIFICATION),
  75         IWL_CMD_ENTRY(REPLY_TX_BEACON),
  76         IWL_CMD_ENTRY(WHO_IS_AWAKE_NOTIFICATION),
  77         IWL_CMD_ENTRY(QUIET_NOTIFICATION),
  78         IWL_CMD_ENTRY(REPLY_TX_PWR_TABLE_CMD),
  79         IWL_CMD_ENTRY(MEASURE_ABORT_NOTIFICATION),
  80         IWL_CMD_ENTRY(REPLY_BT_CONFIG),
  81         IWL_CMD_ENTRY(REPLY_STATISTICS_CMD),
  82         IWL_CMD_ENTRY(STATISTICS_NOTIFICATION),
  83         IWL_CMD_ENTRY(REPLY_CARD_STATE_CMD),
  84         IWL_CMD_ENTRY(CARD_STATE_NOTIFICATION),
  85         IWL_CMD_ENTRY(MISSED_BEACONS_NOTIFICATION),
  86         IWL_CMD_ENTRY(REPLY_CT_KILL_CONFIG_CMD),
  87         IWL_CMD_ENTRY(SENSITIVITY_CMD),
  88         IWL_CMD_ENTRY(REPLY_PHY_CALIBRATION_CMD),
  89         IWL_CMD_ENTRY(REPLY_RX_PHY_CMD),
  90         IWL_CMD_ENTRY(REPLY_RX_MPDU_CMD),
  91         IWL_CMD_ENTRY(REPLY_COMPRESSED_BA),
  92         IWL_CMD_ENTRY(CALIBRATION_CFG_CMD),
  93         IWL_CMD_ENTRY(CALIBRATION_RES_NOTIFICATION),
  94         IWL_CMD_ENTRY(CALIBRATION_COMPLETE_NOTIFICATION),
  95         IWL_CMD_ENTRY(REPLY_TX_POWER_DBM_CMD),
  96         IWL_CMD_ENTRY(TEMPERATURE_NOTIFICATION),
  97         IWL_CMD_ENTRY(TX_ANT_CONFIGURATION_CMD),
  98         IWL_CMD_ENTRY(REPLY_BT_COEX_PROFILE_NOTIF),
  99         IWL_CMD_ENTRY(REPLY_BT_COEX_PRIO_TABLE),
 100         IWL_CMD_ENTRY(REPLY_BT_COEX_PROT_ENV),
 101         IWL_CMD_ENTRY(REPLY_WIPAN_PARAMS),
 102         IWL_CMD_ENTRY(REPLY_WIPAN_RXON),
 103         IWL_CMD_ENTRY(REPLY_WIPAN_RXON_TIMING),
 104         IWL_CMD_ENTRY(REPLY_WIPAN_RXON_ASSOC),
 105         IWL_CMD_ENTRY(REPLY_WIPAN_QOS_PARAM),
 106         IWL_CMD_ENTRY(REPLY_WIPAN_WEPKEY),
 107         IWL_CMD_ENTRY(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
 108         IWL_CMD_ENTRY(REPLY_WIPAN_NOA_NOTIFICATION),
 109         IWL_CMD_ENTRY(REPLY_WIPAN_DEACTIVATION_COMPLETE),
 110         IWL_CMD_ENTRY(REPLY_WOWLAN_PATTERNS),
 111         IWL_CMD_ENTRY(REPLY_WOWLAN_WAKEUP_FILTER),
 112         IWL_CMD_ENTRY(REPLY_WOWLAN_TSC_RSC_PARAMS),
 113         IWL_CMD_ENTRY(REPLY_WOWLAN_TKIP_PARAMS),
 114         IWL_CMD_ENTRY(REPLY_WOWLAN_KEK_KCK_MATERIAL),
 115         IWL_CMD_ENTRY(REPLY_WOWLAN_GET_STATUS),
 116         IWL_CMD_ENTRY(REPLY_D3_CONFIG),
 117 };
 118 #undef IWL_CMD_ENTRY
 119
 120 /******************************************************************************
 121  *
 122  * Generic RX handler implementations
 123  *
 124  ******************************************************************************/
 125
 126 static int iwlagn_rx_reply_error(struct iwl_priv *priv,
 127                                struct iwl_rx_cmd_buffer *rxb,
 128                                struct iwl_device_cmd *cmd)
 129 {
 130         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 131         struct iwl_error_resp *err_resp = (void *)pkt->data;
 132
 133         IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) "
 134                 "seq 0x%04X ser 0x%08X\n",
 135                 le32_to_cpu(err_resp->error_type),
 136                 err_resp->cmd_id,
 137                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 138                 le32_to_cpu(err_resp->error_info));
 139         return 0;
 140 }
 141
 142 static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
 143                                struct iwl_device_cmd *cmd)
 144 {
 145         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 146         struct iwl_csa_notification *csa = (void *)pkt->data;
 147         /*
 148          * MULTI-FIXME
 149          * See iwlagn_mac_channel_switch.
 150          */
 151         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 152         struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
 153
 154         if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 155                 return 0;
 156
 157         if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
 158                 rxon->channel = csa->channel;
 159                 ctx->staging.channel = csa->channel;
 160                 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
 161                               le16_to_cpu(csa->channel));
 162                 iwl_chswitch_done(priv, true);
 163         } else {
 164                 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
 165                         le16_to_cpu(csa->channel));
 166                 iwl_chswitch_done(priv, false);
 167         }
 168         return 0;
 169 }
 170
 171
 172 static int iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
 173                                           struct iwl_rx_cmd_buffer *rxb,
 174                                           struct iwl_device_cmd *cmd)
 175 {
 176         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 177         struct iwl_spectrum_notification *report = (void *)pkt->data;
 178
 179         if (!report->state) {
 180                 IWL_DEBUG_11H(priv,
 181                         "Spectrum Measure Notification: Start\n");
 182                 return 0;
 183         }
 184
 185         memcpy(&priv->measure_report, report, sizeof(*report));
 186         priv->measurement_status |= MEASUREMENT_READY;
 187         return 0;
 188 }
 189
 190 static int iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
 191                                   struct iwl_rx_cmd_buffer *rxb,
 192                                   struct iwl_device_cmd *cmd)
 193 {
 194 #ifdef CONFIG_IWLWIFI_DEBUG
 195         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 196         struct iwl_sleep_notification *sleep = (void *)pkt->data;
 197         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
 198                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
 199 #endif
 200         return 0;
 201 }
 202
 203 static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
 204                                              struct iwl_rx_cmd_buffer *rxb,
 205                                              struct iwl_device_cmd *cmd)
 206 {
 207         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 208         u32 __maybe_unused len = iwl_rx_packet_len(pkt);
 209         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
 210                         "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
 211         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
 212         return 0;
 213 }
 214
 215 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
 216                                 struct iwl_rx_cmd_buffer *rxb,
 217                                 struct iwl_device_cmd *cmd)
 218 {
 219         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 220         struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
 221 #ifdef CONFIG_IWLWIFI_DEBUG
 222         u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
 223         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 224
 225         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
 226                 "tsf:0x%.8x%.8x rate:%d\n",
 227                 status & TX_STATUS_MSK,
 228                 beacon->beacon_notify_hdr.failure_frame,
 229                 le32_to_cpu(beacon->ibss_mgr_status),
 230                 le32_to_cpu(beacon->high_tsf),
 231                 le32_to_cpu(beacon->low_tsf), rate);
 232 #endif
 233
 234         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 235
 236         return 0;
 237 }
 238
 239 /**
 240  * iwl_good_plcp_health - checks for plcp error.
 241  *
 242  * When the plcp error is exceeding the thresholds, reset the radio
 243  * to improve the throughput.
 244  */
 245 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
 246                                  struct statistics_rx_phy *cur_ofdm,
 247                                  struct statistics_rx_ht_phy *cur_ofdm_ht,
 248                                  unsigned int msecs)
 249 {
 250         int delta;
 251         int threshold = priv->plcp_delta_threshold;
 252
 253         if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
 254                 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
 255                 return true;
 256         }
 257
 258         delta = le32_to_cpu(cur_ofdm->plcp_err) -
 259                 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
 260                 le32_to_cpu(cur_ofdm_ht->plcp_err) -
 261                 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
 262
 263         /* Can be negative if firmware reset statistics */
 264         if (delta <= 0)
 265                 return true;
 266
 267         if ((delta * 100 / msecs) > threshold) {
 268                 IWL_DEBUG_RADIO(priv,
 269                                 "plcp health threshold %u delta %d msecs %u\n",
 270                                 threshold, delta, msecs);
 271                 return false;
 272         }
 273
 274         return true;
 275 }
 276
 277 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
 278 {
 279         struct iwl_rf_reset *rf_reset;
 280
 281         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 282                 return -EAGAIN;
 283
 284         if (!iwl_is_any_associated(priv)) {
 285                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
 286                 return -ENOLINK;
 287         }
 288
 289         rf_reset = &priv->rf_reset;
 290         rf_reset->reset_request_count++;
 291         if (!external && rf_reset->last_reset_jiffies &&
 292             time_after(rf_reset->last_reset_jiffies +
 293                        IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
 294                 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
 295                 rf_reset->reset_reject_count++;
 296                 return -EAGAIN;
 297         }
 298         rf_reset->reset_success_count++;
 299         rf_reset->last_reset_jiffies = jiffies;
 300
 301         /*
 302          * There is no easy and better way to force reset the radio,
 303          * the only known method is switching channel which will force to
 304          * reset and tune the radio.
 305          * Use internal short scan (single channel) operation to should
 306          * achieve this objective.
 307          * Driver should reset the radio when number of consecutive missed
 308          * beacon, or any other uCode error condition detected.
 309          */
 310         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
 311         iwl_internal_short_hw_scan(priv);
 312         return 0;
 313 }
 314
 315
 316 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
 317                                 struct statistics_rx_phy *cur_ofdm,
 318                                 struct statistics_rx_ht_phy *cur_ofdm_ht,
 319                                 struct statistics_tx *tx,
 320                                 unsigned long stamp)
 321 {
 322         unsigned int msecs;
 323
 324         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 325                 return;
 326
 327         msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
 328
 329         /* Only gather statistics and update time stamp when not associated */
 330         if (!iwl_is_any_associated(priv))
 331                 return;
 332
 333         /* Do not check/recover when do not have enough statistics data */
 334         if (msecs < 99)
 335                 return;
 336
 337         if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
 338                 iwl_force_rf_reset(priv, false);
 339 }
 340
 341 /* Calculate noise level, based on measurements during network silence just
 342  *   before arriving beacon.  This measurement can be done only if we know
 343  *   exactly when to expect beacons, therefore only when we're associated. */
 344 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
 345 {
 346         struct statistics_rx_non_phy *rx_info;
 347         int num_active_rx = 0;
 348         int total_silence = 0;
 349         int bcn_silence_a, bcn_silence_b, bcn_silence_c;
 350         int last_rx_noise;
 351
 352         rx_info = &priv->statistics.rx_non_phy;
 353
 354         bcn_silence_a =
 355                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
 356         bcn_silence_b =
 357                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
 358         bcn_silence_c =
 359                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
 360
 361         if (bcn_silence_a) {
 362                 total_silence += bcn_silence_a;
 363                 num_active_rx++;
 364         }
 365         if (bcn_silence_b) {
 366                 total_silence += bcn_silence_b;
 367                 num_active_rx++;
 368         }
 369         if (bcn_silence_c) {
 370                 total_silence += bcn_silence_c;
 371                 num_active_rx++;
 372         }
 373
 374         /* Average among active antennas */
 375         if (num_active_rx)
 376                 last_rx_noise = (total_silence / num_active_rx) - 107;
 377         else
 378                 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 379
 380         IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
 381                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
 382                         last_rx_noise);
 383 }
 384
 385 #ifdef CONFIG_IWLWIFI_DEBUGFS
 386 /*
 387  *  based on the assumption of all statistics counter are in DWORD
 388  *  FIXME: This function is for debugging, do not deal with
 389  *  the case of counters roll-over.
 390  */
 391 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
 392                         __le32 *max_delta, __le32 *accum, int size)
 393 {
 394         int i;
 395
 396         for (i = 0;
 397              i < size / sizeof(__le32);
 398              i++, prev++, cur++, delta++, max_delta++, accum++) {
 399                 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
 400                         *delta = cpu_to_le32(
 401                                 le32_to_cpu(*cur) - le32_to_cpu(*prev));
 402                         le32_add_cpu(accum, le32_to_cpu(*delta));
 403                         if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
 404                                 *max_delta = *delta;
 405                 }
 406         }
 407 }
 408
 409 static void
 410 iwlagn_accumulative_statistics(struct iwl_priv *priv,
 411                             struct statistics_general_common *common,
 412                             struct statistics_rx_non_phy *rx_non_phy,
 413                             struct statistics_rx_phy *rx_ofdm,
 414                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 415                             struct statistics_rx_phy *rx_cck,
 416                             struct statistics_tx *tx,
 417                             struct statistics_bt_activity *bt_activity)
 418 {
 419 #define ACCUM(_name)    \
 420         accum_stats((__le32 *)&priv->statistics._name,          \
 421                     (__le32 *)_name,                            \
 422                     (__le32 *)&priv->delta_stats._name,         \
 423                     (__le32 *)&priv->max_delta_stats._name,     \
 424                     (__le32 *)&priv->accum_stats._name,         \
 425                     sizeof(*_name));
 426
 427         ACCUM(common);
 428         ACCUM(rx_non_phy);
 429         ACCUM(rx_ofdm);
 430         ACCUM(rx_ofdm_ht);
 431         ACCUM(rx_cck);
 432         ACCUM(tx);
 433         if (bt_activity)
 434                 ACCUM(bt_activity);
 435 #undef ACCUM
 436 }
 437 #else
 438 static inline void
 439 iwlagn_accumulative_statistics(struct iwl_priv *priv,
 440                             struct statistics_general_common *common,
 441                             struct statistics_rx_non_phy *rx_non_phy,
 442                             struct statistics_rx_phy *rx_ofdm,
 443                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 444                             struct statistics_rx_phy *rx_cck,
 445                             struct statistics_tx *tx,
 446                             struct statistics_bt_activity *bt_activity)
 447 {
 448 }
 449 #endif
 450
 451 static int iwlagn_rx_statistics(struct iwl_priv *priv,
 452                               struct iwl_rx_cmd_buffer *rxb,
 453                               struct iwl_device_cmd *cmd)
 454 {
 455         unsigned long stamp = jiffies;
 456         const int reg_recalib_period = 60;
 457         int change;
 458         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 459         u32 len = iwl_rx_packet_payload_len(pkt);
 460         __le32 *flag;
 461         struct statistics_general_common *common;
 462         struct statistics_rx_non_phy *rx_non_phy;
 463         struct statistics_rx_phy *rx_ofdm;
 464         struct statistics_rx_ht_phy *rx_ofdm_ht;
 465         struct statistics_rx_phy *rx_cck;
 466         struct statistics_tx *tx;
 467         struct statistics_bt_activity *bt_activity;
 468
 469         IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
 470                      len);
 471
 472         spin_lock(&priv->statistics.lock);
 473
 474         if (len == sizeof(struct iwl_bt_notif_statistics)) {
 475                 struct iwl_bt_notif_statistics *stats;
 476                 stats = (void *)&pkt->data;
 477                 flag = &stats->flag;
 478                 common = &stats->general.common;
 479                 rx_non_phy = &stats->rx.general.common;
 480                 rx_ofdm = &stats->rx.ofdm;
 481                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 482                 rx_cck = &stats->rx.cck;
 483                 tx = &stats->tx;
 484                 bt_activity = &stats->general.activity;
 485
 486 #ifdef CONFIG_IWLWIFI_DEBUGFS
 487                 /* handle this exception directly */
 488                 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
 489                 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
 490                              le32_to_cpu(stats->rx.general.num_bt_kills));
 491 #endif
 492         } else if (len == sizeof(struct iwl_notif_statistics)) {
 493                 struct iwl_notif_statistics *stats;
 494                 stats = (void *)&pkt->data;
 495                 flag = &stats->flag;
 496                 common = &stats->general.common;
 497                 rx_non_phy = &stats->rx.general;
 498                 rx_ofdm = &stats->rx.ofdm;
 499                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 500                 rx_cck = &stats->rx.cck;
 501                 tx = &stats->tx;
 502                 bt_activity = NULL;
 503         } else {
 504                 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
 505                           len, sizeof(struct iwl_bt_notif_statistics),
 506                           sizeof(struct iwl_notif_statistics));
 507                 spin_unlock(&priv->statistics.lock);
 508                 return 0;
 509         }
 510
 511         change = common->temperature != priv->statistics.common.temperature ||
 512                  (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
 513                  (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
 514
 515         iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
 516                                     rx_ofdm_ht, rx_cck, tx, bt_activity);
 517
 518         iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
 519
 520         priv->statistics.flag = *flag;
 521         memcpy(&priv->statistics.common, common, sizeof(*common));
 522         memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
 523         memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
 524         memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
 525         memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
 526         memcpy(&priv->statistics.tx, tx, sizeof(*tx));
 527 #ifdef CONFIG_IWLWIFI_DEBUGFS
 528         if (bt_activity)
 529                 memcpy(&priv->statistics.bt_activity, bt_activity,
 530                         sizeof(*bt_activity));
 531 #endif
 532
 533         priv->rx_statistics_jiffies = stamp;
 534
 535         set_bit(STATUS_STATISTICS, &priv->status);
 536
 537         /* Reschedule the statistics timer to occur in
 538          * reg_recalib_period seconds to ensure we get a
 539          * thermal update even if the uCode doesn't give
 540          * us one */
 541         mod_timer(&priv->statistics_periodic, jiffies +
 542                   msecs_to_jiffies(reg_recalib_period * 1000));
 543
 544         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
 545             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
 546                 iwlagn_rx_calc_noise(priv);
 547                 queue_work(priv->workqueue, &priv->run_time_calib_work);
 548         }
 549         if (priv->lib->temperature && change)
 550                 priv->lib->temperature(priv);
 551
 552         spin_unlock(&priv->statistics.lock);
 553
 554         return 0;
 555 }
 556
 557 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
 558                                     struct iwl_rx_cmd_buffer *rxb,
 559                                     struct iwl_device_cmd *cmd)
 560 {
 561         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 562         struct iwl_notif_statistics *stats = (void *)pkt->data;
 563
 564         if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
 565 #ifdef CONFIG_IWLWIFI_DEBUGFS
 566                 memset(&priv->accum_stats, 0,
 567                         sizeof(priv->accum_stats));
 568                 memset(&priv->delta_stats, 0,
 569                         sizeof(priv->delta_stats));
 570                 memset(&priv->max_delta_stats, 0,
 571                         sizeof(priv->max_delta_stats));
 572 #endif
 573                 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
 574         }
 575         iwlagn_rx_statistics(priv, rxb, cmd);
 576         return 0;
 577 }
 578
 579 /* Handle notification from uCode that card's power state is changing
 580  * due to software, hardware, or critical temperature RFKILL */
 581 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
 582                                     struct iwl_rx_cmd_buffer *rxb,
 583                                     struct iwl_device_cmd *cmd)
 584 {
 585         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 586         struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
 587         u32 flags = le32_to_cpu(card_state_notif->flags);
 588         unsigned long status = priv->status;
 589
 590         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 591                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 592                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 593                           (flags & CT_CARD_DISABLED) ?
 594                           "Reached" : "Not reached");
 595
 596         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 597                      CT_CARD_DISABLED)) {
 598
 599                 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 600                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 601
 602                 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
 603                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 604
 605                 if (!(flags & RXON_CARD_DISABLED)) {
 606                         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 607                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 608                         iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
 609                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 610                 }
 611                 if (flags & CT_CARD_DISABLED)
 612                         iwl_tt_enter_ct_kill(priv);
 613         }
 614         if (!(flags & CT_CARD_DISABLED))
 615                 iwl_tt_exit_ct_kill(priv);
 616
 617         if (flags & HW_CARD_DISABLED)
 618                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 619         else
 620                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 621
 622
 623         if (!(flags & RXON_CARD_DISABLED))
 624                 iwl_scan_cancel(priv);
 625
 626         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 627              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 628                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 629                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 630         return 0;
 631 }
 632
 633 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
 634                                        struct iwl_rx_cmd_buffer *rxb,
 635                                        struct iwl_device_cmd *cmd)
 636
 637 {
 638         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 639         struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
 640
 641         if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
 642             priv->missed_beacon_threshold) {
 643                 IWL_DEBUG_CALIB(priv,
 644                     "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
 645                     le32_to_cpu(missed_beacon->consecutive_missed_beacons),
 646                     le32_to_cpu(missed_beacon->total_missed_becons),
 647                     le32_to_cpu(missed_beacon->num_recvd_beacons),
 648                     le32_to_cpu(missed_beacon->num_expected_beacons));
 649                 if (!test_bit(STATUS_SCANNING, &priv->status))
 650                         iwl_init_sensitivity(priv);
 651         }
 652         return 0;
 653 }
 654
 655 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
 656  * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
 657 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
 658                                 struct iwl_rx_cmd_buffer *rxb,
 659                                 struct iwl_device_cmd *cmd)
 660 {
 661         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 662
 663         priv->last_phy_res_valid = true;
 664         priv->ampdu_ref++;
 665         memcpy(&priv->last_phy_res, pkt->data,
 666                sizeof(struct iwl_rx_phy_res));
 667         return 0;
 668 }
 669
 670 /*
 671  * returns non-zero if packet should be dropped
 672  */
 673 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
 674                                   struct ieee80211_hdr *hdr,
 675                                   u32 decrypt_res,
 676                                   struct ieee80211_rx_status *stats)
 677 {
 678         u16 fc = le16_to_cpu(hdr->frame_control);
 679
 680         /*
 681          * All contexts have the same setting here due to it being
 682          * a module parameter, so OK to check any context.
 683          */
 684         if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
 685                                                 RXON_FILTER_DIS_DECRYPT_MSK)
 686                 return 0;
 687
 688         if (!(fc & IEEE80211_FCTL_PROTECTED))
 689                 return 0;
 690
 691         IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
 692         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
 693         case RX_RES_STATUS_SEC_TYPE_TKIP:
 694                 /* The uCode has got a bad phase 1 Key, pushes the packet.
 695                  * Decryption will be done in SW. */
 696                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 697                     RX_RES_STATUS_BAD_KEY_TTAK)
 698                         break;
 699
 700         case RX_RES_STATUS_SEC_TYPE_WEP:
 701                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 702                     RX_RES_STATUS_BAD_ICV_MIC) {
 703                         /* bad ICV, the packet is destroyed since the
 704                          * decryption is inplace, drop it */
 705                         IWL_DEBUG_RX(priv, "Packet destroyed\n");
 706                         return -1;
 707                 }
 708         case RX_RES_STATUS_SEC_TYPE_CCMP:
 709                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 710                     RX_RES_STATUS_DECRYPT_OK) {
 711                         IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
 712                         stats->flag |= RX_FLAG_DECRYPTED;
 713                 }
 714                 break;
 715
 716         default:
 717                 break;
 718         }
 719         return 0;
 720 }
 721
 722 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
 723                                         struct ieee80211_hdr *hdr,
 724                                         u16 len,
 725                                         u32 ampdu_status,
 726                                         struct iwl_rx_cmd_buffer *rxb,
 727                                         struct ieee80211_rx_status *stats)
 728 {
 729         struct sk_buff *skb;
 730         __le16 fc = hdr->frame_control;
 731         struct iwl_rxon_context *ctx;
 732         unsigned int hdrlen, fraglen;
 733
 734         /* We only process data packets if the interface is open */
 735         if (unlikely(!priv->is_open)) {
 736                 IWL_DEBUG_DROP_LIMIT(priv,
 737                     "Dropping packet while interface is not open.\n");
 738                 return;
 739         }
 740
 741         /* In case of HW accelerated crypto and bad decryption, drop */
 742         if (!iwlwifi_mod_params.sw_crypto &&
 743             iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
 744                 return;
 745
 746         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 747          * ieee80211_hdr pulled.
 748          */
 749         skb = alloc_skb(128, GFP_ATOMIC);
 750         if (!skb) {
 751                 IWL_ERR(priv, "alloc_skb failed\n");
 752                 return;
 753         }
 754         /* If frame is small enough to fit in skb->head, pull it completely.
 755          * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
 756          * are more efficient.
 757          */
 758         hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
 759
 760         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 761         fraglen = len - hdrlen;
 762
 763         if (fraglen) {
 764                 int offset = (void *)hdr + hdrlen -
 765                              rxb_addr(rxb) + rxb_offset(rxb);
 766
 767                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 768                                 fraglen, rxb->truesize);
 769         }
 770
 771         /*
 772         * Wake any queues that were stopped due to a passive channel tx
 773         * failure. This can happen because the regulatory enforcement in
 774         * the device waits for a beacon before allowing transmission,
 775         * sometimes even after already having transmitted frames for the
 776         * association because the new RXON may reset the information.
 777         */
 778         if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
 779                 for_each_context(priv, ctx) {
 780                         if (!ether_addr_equal(hdr->addr3,
 781                                               ctx->active.bssid_addr))
 782                                 continue;
 783                         iwlagn_lift_passive_no_rx(priv);
 784                 }
 785         }
 786
 787         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 788
 789         ieee80211_rx(priv->hw, skb);
 790 }
 791
 792 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
 793 {
 794         u32 decrypt_out = 0;
 795
 796         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
 797                                         RX_RES_STATUS_STATION_FOUND)
 798                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
 799                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
 800
 801         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
 802
 803         /* packet was not encrypted */
 804         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 805                                         RX_RES_STATUS_SEC_TYPE_NONE)
 806                 return decrypt_out;
 807
 808         /* packet was encrypted with unknown alg */
 809         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 810                                         RX_RES_STATUS_SEC_TYPE_ERR)
 811                 return decrypt_out;
 812
 813         /* decryption was not done in HW */
 814         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
 815                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
 816                 return decrypt_out;
 817
 818         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
 819
 820         case RX_RES_STATUS_SEC_TYPE_CCMP:
 821                 /* alg is CCM: check MIC only */
 822                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
 823                         /* Bad MIC */
 824                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 825                 else
 826                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 827
 828                 break;
 829
 830         case RX_RES_STATUS_SEC_TYPE_TKIP:
 831                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
 832                         /* Bad TTAK */
 833                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
 834                         break;
 835                 }
 836                 /* fall through if TTAK OK */
 837         default:
 838                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
 839                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 840                 else
 841                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 842                 break;
 843         }
 844
 845         IWL_DEBUG_RX(priv, "decrypt_in:0x%x  decrypt_out = 0x%x\n",
 846                                         decrypt_in, decrypt_out);
 847
 848         return decrypt_out;
 849 }
 850
 851 /* Calc max signal level (dBm) among 3 possible receivers */
 852 static int iwlagn_calc_rssi(struct iwl_priv *priv,
 853                              struct iwl_rx_phy_res *rx_resp)
 854 {
 855         /* data from PHY/DSP regarding signal strength, etc.,
 856          *   contents are always there, not configurable by host
 857          */
 858         struct iwlagn_non_cfg_phy *ncphy =
 859                 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
 860         u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
 861         u8 agc;
 862
 863         val  = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
 864         agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
 865
 866         /* Find max rssi among 3 possible receivers.
 867          * These values are measured by the digital signal processor (DSP).
 868          * They should stay fairly constant even as the signal strength varies,
 869          *   if the radio's automatic gain control (AGC) is working right.
 870          * AGC value (see below) will provide the "interesting" info.
 871          */
 872         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
 873         rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
 874                 IWLAGN_OFDM_RSSI_A_BIT_POS;
 875         rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
 876                 IWLAGN_OFDM_RSSI_B_BIT_POS;
 877         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
 878         rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
 879                 IWLAGN_OFDM_RSSI_C_BIT_POS;
 880
 881         max_rssi = max_t(u32, rssi_a, rssi_b);
 882         max_rssi = max_t(u32, max_rssi, rssi_c);
 883
 884         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
 885                 rssi_a, rssi_b, rssi_c, max_rssi, agc);
 886
 887         /* dBm = max_rssi dB - agc dB - constant.
 888          * Higher AGC (higher radio gain) means lower signal. */
 889         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
 890 }
 891
 892 /* Called for REPLY_RX_MPDU_CMD */
 893 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
 894                             struct iwl_rx_cmd_buffer *rxb,
 895                             struct iwl_device_cmd *cmd)
 896 {
 897         struct ieee80211_hdr *header;
 898         struct ieee80211_rx_status rx_status = {};
 899         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 900         struct iwl_rx_phy_res *phy_res;
 901         __le32 rx_pkt_status;
 902         struct iwl_rx_mpdu_res_start *amsdu;
 903         u32 len;
 904         u32 ampdu_status;
 905         u32 rate_n_flags;
 906
 907         if (!priv->last_phy_res_valid) {
 908                 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
 909                 return 0;
 910         }
 911         phy_res = &priv->last_phy_res;
 912         amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
 913         header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
 914         len = le16_to_cpu(amsdu->byte_count);
 915         rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
 916         ampdu_status = iwlagn_translate_rx_status(priv,
 917                                                   le32_to_cpu(rx_pkt_status));
 918
 919         if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
 920                 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
 921                                 phy_res->cfg_phy_cnt);
 922                 return 0;
 923         }
 924
 925         if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
 926             !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 927                 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
 928                                 le32_to_cpu(rx_pkt_status));
 929                 return 0;
 930         }
 931
 932         /* This will be used in several places later */
 933         rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
 934
 935         /* rx_status carries information about the packet to mac80211 */
 936         rx_status.mactime = le64_to_cpu(phy_res->timestamp);
 937         rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 938                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 939         rx_status.freq =
 940                 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
 941                                                rx_status.band);
 942         rx_status.rate_idx =
 943                 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
 944         rx_status.flag = 0;
 945
 946         /* TSF isn't reliable. In order to allow smooth user experience,
 947          * this W/A doesn't propagate it to the mac80211 */
 948         /*rx_status.flag |= RX_FLAG_MACTIME_START;*/
 949
 950         priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
 951
 952         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
 953         rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
 954
 955         IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
 956                 rx_status.signal, (unsigned long long)rx_status.mactime);
 957
 958         /*
 959          * "antenna number"
 960          *
 961          * It seems that the antenna field in the phy flags value
 962          * is actually a bit field. This is undefined by radiotap,
 963          * it wants an actual antenna number but I always get "7"
 964          * for most legacy frames I receive indicating that the
 965          * same frame was received on all three RX chains.
 966          *
 967          * I think this field should be removed in favor of a
 968          * new 802.11n radiotap field "RX chains" that is defined
 969          * as a bitmask.
 970          */
 971         rx_status.antenna =
 972                 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
 973                 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 974
 975         /* set the preamble flag if appropriate */
 976         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 977                 rx_status.flag |= RX_FLAG_SHORTPRE;
 978
 979         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
 980                 /*
 981                  * We know which subframes of an A-MPDU belong
 982                  * together since we get a single PHY response
 983                  * from the firmware for all of them
 984                  */
 985                 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
 986                 rx_status.ampdu_reference = priv->ampdu_ref;
 987         }
 988
 989         /* Set up the HT phy flags */
 990         if (rate_n_flags & RATE_MCS_HT_MSK)
 991                 rx_status.flag |= RX_FLAG_HT;
 992         if (rate_n_flags & RATE_MCS_HT40_MSK)
 993                 rx_status.flag |= RX_FLAG_40MHZ;
 994         if (rate_n_flags & RATE_MCS_SGI_MSK)
 995                 rx_status.flag |= RX_FLAG_SHORT_GI;
 996         if (rate_n_flags & RATE_MCS_GF_MSK)
 997                 rx_status.flag |= RX_FLAG_HT_GF;
 998
 999         iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1000                                     rxb, &rx_status);
1001         return 0;
1002 }
1003
1004 static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1005                                       struct iwl_rx_cmd_buffer *rxb,
1006                                       struct iwl_device_cmd *cmd)
1007 {
1008         struct iwl_wipan_noa_data *new_data, *old_data;
1009         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1010         struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
1011
1012         /* no condition -- we're in softirq */
1013         old_data = rcu_dereference_protected(priv->noa_data, true);
1014
1015         if (noa_notif->noa_active) {
1016                 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1017                 u32 copylen = len;
1018
1019                 /* EID, len, OUI, subtype */
1020                 len += 1 + 1 + 3 + 1;
1021                 /* P2P id, P2P length */
1022                 len += 1 + 2;
1023                 copylen += 1 + 2;
1024
1025                 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1026                 if (new_data) {
1027                         new_data->length = len;
1028                         new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1029                         new_data->data[1] = len - 2; /* not counting EID, len */
1030                         new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1031                         new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1032                         new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1033                         new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1034                         memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1035                                copylen);
1036                 }
1037         } else
1038                 new_data = NULL;
1039
1040         rcu_assign_pointer(priv->noa_data, new_data);
1041
1042         if (old_data)
1043                 kfree_rcu(old_data, rcu_head);
1044
1045         return 0;
1046 }
1047
1048 /**
1049  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1050  *
1051  * Setup the RX handlers for each of the reply types sent from the uCode
1052  * to the host.
1053  */
1054 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1055 {
1056         int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1057                                struct iwl_device_cmd *cmd);
1058
1059         handlers = priv->rx_handlers;
1060
1061         handlers[REPLY_ERROR]                   = iwlagn_rx_reply_error;
1062         handlers[CHANNEL_SWITCH_NOTIFICATION]   = iwlagn_rx_csa;
1063         handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1064                 iwlagn_rx_spectrum_measure_notif;
1065         handlers[PM_SLEEP_NOTIFICATION]         = iwlagn_rx_pm_sleep_notif;
1066         handlers[PM_DEBUG_STATISTIC_NOTIFIC]    =
1067                 iwlagn_rx_pm_debug_statistics_notif;
1068         handlers[BEACON_NOTIFICATION]           = iwlagn_rx_beacon_notif;
1069         handlers[REPLY_ADD_STA]                 = iwl_add_sta_callback;
1070
1071         handlers[REPLY_WIPAN_NOA_NOTIFICATION]  = iwlagn_rx_noa_notification;
1072
1073         /*
1074          * The same handler is used for both the REPLY to a discrete
1075          * statistics request from the host as well as for the periodic
1076          * statistics notifications (after received beacons) from the uCode.
1077          */
1078         handlers[REPLY_STATISTICS_CMD]          = iwlagn_rx_reply_statistics;
1079         handlers[STATISTICS_NOTIFICATION]       = iwlagn_rx_statistics;
1080
1081         iwl_setup_rx_scan_handlers(priv);
1082
1083         handlers[CARD_STATE_NOTIFICATION]       = iwlagn_rx_card_state_notif;
1084         handlers[MISSED_BEACONS_NOTIFICATION]   =
1085                 iwlagn_rx_missed_beacon_notif;
1086
1087         /* Rx handlers */
1088         handlers[REPLY_RX_PHY_CMD]              = iwlagn_rx_reply_rx_phy;
1089         handlers[REPLY_RX_MPDU_CMD]             = iwlagn_rx_reply_rx;
1090
1091         /* block ack */
1092         handlers[REPLY_COMPRESSED_BA]           =
1093                 iwlagn_rx_reply_compressed_ba;
1094
1095         priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1096
1097         /* set up notification wait support */
1098         iwl_notification_wait_init(&priv->notif_wait);
1099
1100         /* Set up BT Rx handlers */
1101         if (priv->lib->bt_params)
1102                 iwlagn_bt_rx_handler_setup(priv);
1103 }
1104
1105 int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1106                     struct iwl_device_cmd *cmd)
1107 {
1108         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1109         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1110         int err = 0;
1111
1112         /*
1113          * Do the notification wait before RX handlers so
1114          * even if the RX handler consumes the RXB we have
1115          * access to it in the notification wait entry.
1116          */
1117         iwl_notification_wait_notify(&priv->notif_wait, pkt);
1118
1119         /* Based on type of command response or notification,
1120          *   handle those that need handling via function in
1121          *   rx_handlers table.  See iwl_setup_rx_handlers() */
1122         if (priv->rx_handlers[pkt->hdr.cmd]) {
1123                 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1124                 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1125         } else {
1126                 /* No handling needed */
1127                 IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1128                              iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1129                              pkt->hdr.cmd);
1130         }
1131         return err;
1132 }