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 void iwlagn_rx_reply_error(struct iwl_priv *priv,
 127                                   struct iwl_rx_cmd_buffer *rxb)
 128 {
 129         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 130         struct iwl_error_resp *err_resp = (void *)pkt->data;
 131
 132         IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) "
 133                 "seq 0x%04X ser 0x%08X\n",
 134                 le32_to_cpu(err_resp->error_type),
 135                 err_resp->cmd_id,
 136                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 137                 le32_to_cpu(err_resp->error_info));
 138 }
 139
 140 static void iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
 141 {
 142         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 143         struct iwl_csa_notification *csa = (void *)pkt->data;
 144         /*
 145          * MULTI-FIXME
 146          * See iwlagn_mac_channel_switch.
 147          */
 148         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 149         struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
 150
 151         if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 152                 return;
 153
 154         if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
 155                 rxon->channel = csa->channel;
 156                 ctx->staging.channel = csa->channel;
 157                 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
 158                               le16_to_cpu(csa->channel));
 159                 iwl_chswitch_done(priv, true);
 160         } else {
 161                 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
 162                         le16_to_cpu(csa->channel));
 163                 iwl_chswitch_done(priv, false);
 164         }
 165 }
 166
 167
 168 static void iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
 169                                              struct iwl_rx_cmd_buffer *rxb)
 170 {
 171         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 172         struct iwl_spectrum_notification *report = (void *)pkt->data;
 173
 174         if (!report->state) {
 175                 IWL_DEBUG_11H(priv,
 176                         "Spectrum Measure Notification: Start\n");
 177                 return;
 178         }
 179
 180         memcpy(&priv->measure_report, report, sizeof(*report));
 181         priv->measurement_status |= MEASUREMENT_READY;
 182 }
 183
 184 static void iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
 185                                      struct iwl_rx_cmd_buffer *rxb)
 186 {
 187 #ifdef CONFIG_IWLWIFI_DEBUG
 188         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 189         struct iwl_sleep_notification *sleep = (void *)pkt->data;
 190         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
 191                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
 192 #endif
 193 }
 194
 195 static void iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
 196                                                 struct iwl_rx_cmd_buffer *rxb)
 197 {
 198         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 199         u32 __maybe_unused len = iwl_rx_packet_len(pkt);
 200         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
 201                         "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
 202         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
 203 }
 204
 205 static void iwlagn_rx_beacon_notif(struct iwl_priv *priv,
 206                                    struct iwl_rx_cmd_buffer *rxb)
 207 {
 208         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 209         struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
 210 #ifdef CONFIG_IWLWIFI_DEBUG
 211         u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
 212         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 213
 214         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
 215                 "tsf:0x%.8x%.8x rate:%d\n",
 216                 status & TX_STATUS_MSK,
 217                 beacon->beacon_notify_hdr.failure_frame,
 218                 le32_to_cpu(beacon->ibss_mgr_status),
 219                 le32_to_cpu(beacon->high_tsf),
 220                 le32_to_cpu(beacon->low_tsf), rate);
 221 #endif
 222
 223         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 224 }
 225
 226 /**
 227  * iwl_good_plcp_health - checks for plcp error.
 228  *
 229  * When the plcp error is exceeding the thresholds, reset the radio
 230  * to improve the throughput.
 231  */
 232 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
 233                                  struct statistics_rx_phy *cur_ofdm,
 234                                  struct statistics_rx_ht_phy *cur_ofdm_ht,
 235                                  unsigned int msecs)
 236 {
 237         int delta;
 238         int threshold = priv->plcp_delta_threshold;
 239
 240         if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
 241                 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
 242                 return true;
 243         }
 244
 245         delta = le32_to_cpu(cur_ofdm->plcp_err) -
 246                 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
 247                 le32_to_cpu(cur_ofdm_ht->plcp_err) -
 248                 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
 249
 250         /* Can be negative if firmware reset statistics */
 251         if (delta <= 0)
 252                 return true;
 253
 254         if ((delta * 100 / msecs) > threshold) {
 255                 IWL_DEBUG_RADIO(priv,
 256                                 "plcp health threshold %u delta %d msecs %u\n",
 257                                 threshold, delta, msecs);
 258                 return false;
 259         }
 260
 261         return true;
 262 }
 263
 264 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
 265 {
 266         struct iwl_rf_reset *rf_reset;
 267
 268         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 269                 return -EAGAIN;
 270
 271         if (!iwl_is_any_associated(priv)) {
 272                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
 273                 return -ENOLINK;
 274         }
 275
 276         rf_reset = &priv->rf_reset;
 277         rf_reset->reset_request_count++;
 278         if (!external && rf_reset->last_reset_jiffies &&
 279             time_after(rf_reset->last_reset_jiffies +
 280                        IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
 281                 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
 282                 rf_reset->reset_reject_count++;
 283                 return -EAGAIN;
 284         }
 285         rf_reset->reset_success_count++;
 286         rf_reset->last_reset_jiffies = jiffies;
 287
 288         /*
 289          * There is no easy and better way to force reset the radio,
 290          * the only known method is switching channel which will force to
 291          * reset and tune the radio.
 292          * Use internal short scan (single channel) operation to should
 293          * achieve this objective.
 294          * Driver should reset the radio when number of consecutive missed
 295          * beacon, or any other uCode error condition detected.
 296          */
 297         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
 298         iwl_internal_short_hw_scan(priv);
 299         return 0;
 300 }
 301
 302
 303 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
 304                                 struct statistics_rx_phy *cur_ofdm,
 305                                 struct statistics_rx_ht_phy *cur_ofdm_ht,
 306                                 struct statistics_tx *tx,
 307                                 unsigned long stamp)
 308 {
 309         unsigned int msecs;
 310
 311         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 312                 return;
 313
 314         msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
 315
 316         /* Only gather statistics and update time stamp when not associated */
 317         if (!iwl_is_any_associated(priv))
 318                 return;
 319
 320         /* Do not check/recover when do not have enough statistics data */
 321         if (msecs < 99)
 322                 return;
 323
 324         if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
 325                 iwl_force_rf_reset(priv, false);
 326 }
 327
 328 /* Calculate noise level, based on measurements during network silence just
 329  *   before arriving beacon.  This measurement can be done only if we know
 330  *   exactly when to expect beacons, therefore only when we're associated. */
 331 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
 332 {
 333         struct statistics_rx_non_phy *rx_info;
 334         int num_active_rx = 0;
 335         int total_silence = 0;
 336         int bcn_silence_a, bcn_silence_b, bcn_silence_c;
 337         int last_rx_noise;
 338
 339         rx_info = &priv->statistics.rx_non_phy;
 340
 341         bcn_silence_a =
 342                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
 343         bcn_silence_b =
 344                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
 345         bcn_silence_c =
 346                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
 347
 348         if (bcn_silence_a) {
 349                 total_silence += bcn_silence_a;
 350                 num_active_rx++;
 351         }
 352         if (bcn_silence_b) {
 353                 total_silence += bcn_silence_b;
 354                 num_active_rx++;
 355         }
 356         if (bcn_silence_c) {
 357                 total_silence += bcn_silence_c;
 358                 num_active_rx++;
 359         }
 360
 361         /* Average among active antennas */
 362         if (num_active_rx)
 363                 last_rx_noise = (total_silence / num_active_rx) - 107;
 364         else
 365                 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 366
 367         IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
 368                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
 369                         last_rx_noise);
 370 }
 371
 372 #ifdef CONFIG_IWLWIFI_DEBUGFS
 373 /*
 374  *  based on the assumption of all statistics counter are in DWORD
 375  *  FIXME: This function is for debugging, do not deal with
 376  *  the case of counters roll-over.
 377  */
 378 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
 379                         __le32 *max_delta, __le32 *accum, int size)
 380 {
 381         int i;
 382
 383         for (i = 0;
 384              i < size / sizeof(__le32);
 385              i++, prev++, cur++, delta++, max_delta++, accum++) {
 386                 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
 387                         *delta = cpu_to_le32(
 388                                 le32_to_cpu(*cur) - le32_to_cpu(*prev));
 389                         le32_add_cpu(accum, le32_to_cpu(*delta));
 390                         if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
 391                                 *max_delta = *delta;
 392                 }
 393         }
 394 }
 395
 396 static void
 397 iwlagn_accumulative_statistics(struct iwl_priv *priv,
 398                             struct statistics_general_common *common,
 399                             struct statistics_rx_non_phy *rx_non_phy,
 400                             struct statistics_rx_phy *rx_ofdm,
 401                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 402                             struct statistics_rx_phy *rx_cck,
 403                             struct statistics_tx *tx,
 404                             struct statistics_bt_activity *bt_activity)
 405 {
 406 #define ACCUM(_name)    \
 407         accum_stats((__le32 *)&priv->statistics._name,          \
 408                     (__le32 *)_name,                            \
 409                     (__le32 *)&priv->delta_stats._name,         \
 410                     (__le32 *)&priv->max_delta_stats._name,     \
 411                     (__le32 *)&priv->accum_stats._name,         \
 412                     sizeof(*_name));
 413
 414         ACCUM(common);
 415         ACCUM(rx_non_phy);
 416         ACCUM(rx_ofdm);
 417         ACCUM(rx_ofdm_ht);
 418         ACCUM(rx_cck);
 419         ACCUM(tx);
 420         if (bt_activity)
 421                 ACCUM(bt_activity);
 422 #undef ACCUM
 423 }
 424 #else
 425 static inline void
 426 iwlagn_accumulative_statistics(struct iwl_priv *priv,
 427                             struct statistics_general_common *common,
 428                             struct statistics_rx_non_phy *rx_non_phy,
 429                             struct statistics_rx_phy *rx_ofdm,
 430                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 431                             struct statistics_rx_phy *rx_cck,
 432                             struct statistics_tx *tx,
 433                             struct statistics_bt_activity *bt_activity)
 434 {
 435 }
 436 #endif
 437
 438 static void iwlagn_rx_statistics(struct iwl_priv *priv,
 439                                  struct iwl_rx_cmd_buffer *rxb)
 440 {
 441         unsigned long stamp = jiffies;
 442         const int reg_recalib_period = 60;
 443         int change;
 444         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 445         u32 len = iwl_rx_packet_payload_len(pkt);
 446         __le32 *flag;
 447         struct statistics_general_common *common;
 448         struct statistics_rx_non_phy *rx_non_phy;
 449         struct statistics_rx_phy *rx_ofdm;
 450         struct statistics_rx_ht_phy *rx_ofdm_ht;
 451         struct statistics_rx_phy *rx_cck;
 452         struct statistics_tx *tx;
 453         struct statistics_bt_activity *bt_activity;
 454
 455         IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
 456                      len);
 457
 458         spin_lock(&priv->statistics.lock);
 459
 460         if (len == sizeof(struct iwl_bt_notif_statistics)) {
 461                 struct iwl_bt_notif_statistics *stats;
 462                 stats = (void *)&pkt->data;
 463                 flag = &stats->flag;
 464                 common = &stats->general.common;
 465                 rx_non_phy = &stats->rx.general.common;
 466                 rx_ofdm = &stats->rx.ofdm;
 467                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 468                 rx_cck = &stats->rx.cck;
 469                 tx = &stats->tx;
 470                 bt_activity = &stats->general.activity;
 471
 472 #ifdef CONFIG_IWLWIFI_DEBUGFS
 473                 /* handle this exception directly */
 474                 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
 475                 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
 476                              le32_to_cpu(stats->rx.general.num_bt_kills));
 477 #endif
 478         } else if (len == sizeof(struct iwl_notif_statistics)) {
 479                 struct iwl_notif_statistics *stats;
 480                 stats = (void *)&pkt->data;
 481                 flag = &stats->flag;
 482                 common = &stats->general.common;
 483                 rx_non_phy = &stats->rx.general;
 484                 rx_ofdm = &stats->rx.ofdm;
 485                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 486                 rx_cck = &stats->rx.cck;
 487                 tx = &stats->tx;
 488                 bt_activity = NULL;
 489         } else {
 490                 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
 491                           len, sizeof(struct iwl_bt_notif_statistics),
 492                           sizeof(struct iwl_notif_statistics));
 493                 spin_unlock(&priv->statistics.lock);
 494                 return;
 495         }
 496
 497         change = common->temperature != priv->statistics.common.temperature ||
 498                  (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
 499                  (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
 500
 501         iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
 502                                     rx_ofdm_ht, rx_cck, tx, bt_activity);
 503
 504         iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
 505
 506         priv->statistics.flag = *flag;
 507         memcpy(&priv->statistics.common, common, sizeof(*common));
 508         memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
 509         memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
 510         memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
 511         memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
 512         memcpy(&priv->statistics.tx, tx, sizeof(*tx));
 513 #ifdef CONFIG_IWLWIFI_DEBUGFS
 514         if (bt_activity)
 515                 memcpy(&priv->statistics.bt_activity, bt_activity,
 516                         sizeof(*bt_activity));
 517 #endif
 518
 519         priv->rx_statistics_jiffies = stamp;
 520
 521         set_bit(STATUS_STATISTICS, &priv->status);
 522
 523         /* Reschedule the statistics timer to occur in
 524          * reg_recalib_period seconds to ensure we get a
 525          * thermal update even if the uCode doesn't give
 526          * us one */
 527         mod_timer(&priv->statistics_periodic, jiffies +
 528                   msecs_to_jiffies(reg_recalib_period * 1000));
 529
 530         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
 531             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
 532                 iwlagn_rx_calc_noise(priv);
 533                 queue_work(priv->workqueue, &priv->run_time_calib_work);
 534         }
 535         if (priv->lib->temperature && change)
 536                 priv->lib->temperature(priv);
 537
 538         spin_unlock(&priv->statistics.lock);
 539 }
 540
 541 static void iwlagn_rx_reply_statistics(struct iwl_priv *priv,
 542                                        struct iwl_rx_cmd_buffer *rxb)
 543 {
 544         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 545         struct iwl_notif_statistics *stats = (void *)pkt->data;
 546
 547         if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
 548 #ifdef CONFIG_IWLWIFI_DEBUGFS
 549                 memset(&priv->accum_stats, 0,
 550                         sizeof(priv->accum_stats));
 551                 memset(&priv->delta_stats, 0,
 552                         sizeof(priv->delta_stats));
 553                 memset(&priv->max_delta_stats, 0,
 554                         sizeof(priv->max_delta_stats));
 555 #endif
 556                 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
 557         }
 558
 559         iwlagn_rx_statistics(priv, rxb);
 560 }
 561
 562 /* Handle notification from uCode that card's power state is changing
 563  * due to software, hardware, or critical temperature RFKILL */
 564 static void iwlagn_rx_card_state_notif(struct iwl_priv *priv,
 565                                        struct iwl_rx_cmd_buffer *rxb)
 566 {
 567         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 568         struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
 569         u32 flags = le32_to_cpu(card_state_notif->flags);
 570         unsigned long status = priv->status;
 571
 572         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 573                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 574                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 575                           (flags & CT_CARD_DISABLED) ?
 576                           "Reached" : "Not reached");
 577
 578         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 579                      CT_CARD_DISABLED)) {
 580
 581                 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 582                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 583
 584                 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
 585                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 586
 587                 if (!(flags & RXON_CARD_DISABLED)) {
 588                         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 589                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 590                         iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
 591                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 592                 }
 593                 if (flags & CT_CARD_DISABLED)
 594                         iwl_tt_enter_ct_kill(priv);
 595         }
 596         if (!(flags & CT_CARD_DISABLED))
 597                 iwl_tt_exit_ct_kill(priv);
 598
 599         if (flags & HW_CARD_DISABLED)
 600                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 601         else
 602                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 603
 604
 605         if (!(flags & RXON_CARD_DISABLED))
 606                 iwl_scan_cancel(priv);
 607
 608         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 609              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 610                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 611                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 612 }
 613
 614 static void iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
 615                                           struct iwl_rx_cmd_buffer *rxb)
 616
 617 {
 618         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 619         struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
 620
 621         if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
 622             priv->missed_beacon_threshold) {
 623                 IWL_DEBUG_CALIB(priv,
 624                     "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
 625                     le32_to_cpu(missed_beacon->consecutive_missed_beacons),
 626                     le32_to_cpu(missed_beacon->total_missed_becons),
 627                     le32_to_cpu(missed_beacon->num_recvd_beacons),
 628                     le32_to_cpu(missed_beacon->num_expected_beacons));
 629                 if (!test_bit(STATUS_SCANNING, &priv->status))
 630                         iwl_init_sensitivity(priv);
 631         }
 632 }
 633
 634 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
 635  * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
 636 static void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
 637                                    struct iwl_rx_cmd_buffer *rxb)
 638 {
 639         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 640
 641         priv->last_phy_res_valid = true;
 642         priv->ampdu_ref++;
 643         memcpy(&priv->last_phy_res, pkt->data,
 644                sizeof(struct iwl_rx_phy_res));
 645 }
 646
 647 /*
 648  * returns non-zero if packet should be dropped
 649  */
 650 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
 651                                   struct ieee80211_hdr *hdr,
 652                                   u32 decrypt_res,
 653                                   struct ieee80211_rx_status *stats)
 654 {
 655         u16 fc = le16_to_cpu(hdr->frame_control);
 656
 657         /*
 658          * All contexts have the same setting here due to it being
 659          * a module parameter, so OK to check any context.
 660          */
 661         if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
 662                                                 RXON_FILTER_DIS_DECRYPT_MSK)
 663                 return 0;
 664
 665         if (!(fc & IEEE80211_FCTL_PROTECTED))
 666                 return 0;
 667
 668         IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
 669         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
 670         case RX_RES_STATUS_SEC_TYPE_TKIP:
 671                 /* The uCode has got a bad phase 1 Key, pushes the packet.
 672                  * Decryption will be done in SW. */
 673                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 674                     RX_RES_STATUS_BAD_KEY_TTAK)
 675                         break;
 676
 677         case RX_RES_STATUS_SEC_TYPE_WEP:
 678                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 679                     RX_RES_STATUS_BAD_ICV_MIC) {
 680                         /* bad ICV, the packet is destroyed since the
 681                          * decryption is inplace, drop it */
 682                         IWL_DEBUG_RX(priv, "Packet destroyed\n");
 683                         return -1;
 684                 }
 685         case RX_RES_STATUS_SEC_TYPE_CCMP:
 686                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 687                     RX_RES_STATUS_DECRYPT_OK) {
 688                         IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
 689                         stats->flag |= RX_FLAG_DECRYPTED;
 690                 }
 691                 break;
 692
 693         default:
 694                 break;
 695         }
 696         return 0;
 697 }
 698
 699 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
 700                                         struct ieee80211_hdr *hdr,
 701                                         u16 len,
 702                                         u32 ampdu_status,
 703                                         struct iwl_rx_cmd_buffer *rxb,
 704                                         struct ieee80211_rx_status *stats)
 705 {
 706         struct sk_buff *skb;
 707         __le16 fc = hdr->frame_control;
 708         struct iwl_rxon_context *ctx;
 709         unsigned int hdrlen, fraglen;
 710
 711         /* We only process data packets if the interface is open */
 712         if (unlikely(!priv->is_open)) {
 713                 IWL_DEBUG_DROP_LIMIT(priv,
 714                     "Dropping packet while interface is not open.\n");
 715                 return;
 716         }
 717
 718         /* In case of HW accelerated crypto and bad decryption, drop */
 719         if (!iwlwifi_mod_params.sw_crypto &&
 720             iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
 721                 return;
 722
 723         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 724          * ieee80211_hdr pulled.
 725          */
 726         skb = alloc_skb(128, GFP_ATOMIC);
 727         if (!skb) {
 728                 IWL_ERR(priv, "alloc_skb failed\n");
 729                 return;
 730         }
 731         /* If frame is small enough to fit in skb->head, pull it completely.
 732          * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
 733          * are more efficient.
 734          */
 735         hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
 736
 737         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 738         fraglen = len - hdrlen;
 739
 740         if (fraglen) {
 741                 int offset = (void *)hdr + hdrlen -
 742                              rxb_addr(rxb) + rxb_offset(rxb);
 743
 744                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 745                                 fraglen, rxb->truesize);
 746         }
 747
 748         /*
 749         * Wake any queues that were stopped due to a passive channel tx
 750         * failure. This can happen because the regulatory enforcement in
 751         * the device waits for a beacon before allowing transmission,
 752         * sometimes even after already having transmitted frames for the
 753         * association because the new RXON may reset the information.
 754         */
 755         if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
 756                 for_each_context(priv, ctx) {
 757                         if (!ether_addr_equal(hdr->addr3,
 758                                               ctx->active.bssid_addr))
 759                                 continue;
 760                         iwlagn_lift_passive_no_rx(priv);
 761                 }
 762         }
 763
 764         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 765
 766         ieee80211_rx_napi(priv->hw, skb, priv->napi);
 767 }
 768
 769 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
 770 {
 771         u32 decrypt_out = 0;
 772
 773         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
 774                                         RX_RES_STATUS_STATION_FOUND)
 775                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
 776                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
 777
 778         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
 779
 780         /* packet was not encrypted */
 781         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 782                                         RX_RES_STATUS_SEC_TYPE_NONE)
 783                 return decrypt_out;
 784
 785         /* packet was encrypted with unknown alg */
 786         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 787                                         RX_RES_STATUS_SEC_TYPE_ERR)
 788                 return decrypt_out;
 789
 790         /* decryption was not done in HW */
 791         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
 792                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
 793                 return decrypt_out;
 794
 795         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
 796
 797         case RX_RES_STATUS_SEC_TYPE_CCMP:
 798                 /* alg is CCM: check MIC only */
 799                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
 800                         /* Bad MIC */
 801                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 802                 else
 803                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 804
 805                 break;
 806
 807         case RX_RES_STATUS_SEC_TYPE_TKIP:
 808                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
 809                         /* Bad TTAK */
 810                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
 811                         break;
 812                 }
 813                 /* fall through if TTAK OK */
 814         default:
 815                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
 816                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 817                 else
 818                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 819                 break;
 820         }
 821
 822         IWL_DEBUG_RX(priv, "decrypt_in:0x%x  decrypt_out = 0x%x\n",
 823                                         decrypt_in, decrypt_out);
 824
 825         return decrypt_out;
 826 }
 827
 828 /* Calc max signal level (dBm) among 3 possible receivers */
 829 static int iwlagn_calc_rssi(struct iwl_priv *priv,
 830                              struct iwl_rx_phy_res *rx_resp)
 831 {
 832         /* data from PHY/DSP regarding signal strength, etc.,
 833          *   contents are always there, not configurable by host
 834          */
 835         struct iwlagn_non_cfg_phy *ncphy =
 836                 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
 837         u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
 838         u8 agc;
 839
 840         val  = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
 841         agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
 842
 843         /* Find max rssi among 3 possible receivers.
 844          * These values are measured by the digital signal processor (DSP).
 845          * They should stay fairly constant even as the signal strength varies,
 846          *   if the radio's automatic gain control (AGC) is working right.
 847          * AGC value (see below) will provide the "interesting" info.
 848          */
 849         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
 850         rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
 851                 IWLAGN_OFDM_RSSI_A_BIT_POS;
 852         rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
 853                 IWLAGN_OFDM_RSSI_B_BIT_POS;
 854         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
 855         rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
 856                 IWLAGN_OFDM_RSSI_C_BIT_POS;
 857
 858         max_rssi = max_t(u32, rssi_a, rssi_b);
 859         max_rssi = max_t(u32, max_rssi, rssi_c);
 860
 861         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
 862                 rssi_a, rssi_b, rssi_c, max_rssi, agc);
 863
 864         /* dBm = max_rssi dB - agc dB - constant.
 865          * Higher AGC (higher radio gain) means lower signal. */
 866         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
 867 }
 868
 869 /* Called for REPLY_RX_MPDU_CMD */
 870 static void iwlagn_rx_reply_rx(struct iwl_priv *priv,
 871                                struct iwl_rx_cmd_buffer *rxb)
 872 {
 873         struct ieee80211_hdr *header;
 874         struct ieee80211_rx_status rx_status = {};
 875         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 876         struct iwl_rx_phy_res *phy_res;
 877         __le32 rx_pkt_status;
 878         struct iwl_rx_mpdu_res_start *amsdu;
 879         u32 len;
 880         u32 ampdu_status;
 881         u32 rate_n_flags;
 882
 883         if (!priv->last_phy_res_valid) {
 884                 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
 885                 return;
 886         }
 887         phy_res = &priv->last_phy_res;
 888         amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
 889         header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
 890         len = le16_to_cpu(amsdu->byte_count);
 891         rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
 892         ampdu_status = iwlagn_translate_rx_status(priv,
 893                                                   le32_to_cpu(rx_pkt_status));
 894
 895         if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
 896                 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
 897                                 phy_res->cfg_phy_cnt);
 898                 return;
 899         }
 900
 901         if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
 902             !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 903                 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
 904                                 le32_to_cpu(rx_pkt_status));
 905                 return;
 906         }
 907
 908         /* This will be used in several places later */
 909         rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
 910
 911         /* rx_status carries information about the packet to mac80211 */
 912         rx_status.mactime = le64_to_cpu(phy_res->timestamp);
 913         rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 914                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 915         rx_status.freq =
 916                 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
 917                                                rx_status.band);
 918         rx_status.rate_idx =
 919                 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
 920         rx_status.flag = 0;
 921
 922         /* TSF isn't reliable. In order to allow smooth user experience,
 923          * this W/A doesn't propagate it to the mac80211 */
 924         /*rx_status.flag |= RX_FLAG_MACTIME_START;*/
 925
 926         priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
 927
 928         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
 929         rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
 930
 931         IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
 932                 rx_status.signal, (unsigned long long)rx_status.mactime);
 933
 934         /*
 935          * "antenna number"
 936          *
 937          * It seems that the antenna field in the phy flags value
 938          * is actually a bit field. This is undefined by radiotap,
 939          * it wants an actual antenna number but I always get "7"
 940          * for most legacy frames I receive indicating that the
 941          * same frame was received on all three RX chains.
 942          *
 943          * I think this field should be removed in favor of a
 944          * new 802.11n radiotap field "RX chains" that is defined
 945          * as a bitmask.
 946          */
 947         rx_status.antenna =
 948                 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
 949                 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 950
 951         /* set the preamble flag if appropriate */
 952         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 953                 rx_status.flag |= RX_FLAG_SHORTPRE;
 954
 955         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
 956                 /*
 957                  * We know which subframes of an A-MPDU belong
 958                  * together since we get a single PHY response
 959                  * from the firmware for all of them
 960                  */
 961                 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
 962                 rx_status.ampdu_reference = priv->ampdu_ref;
 963         }
 964
 965         /* Set up the HT phy flags */
 966         if (rate_n_flags & RATE_MCS_HT_MSK)
 967                 rx_status.flag |= RX_FLAG_HT;
 968         if (rate_n_flags & RATE_MCS_HT40_MSK)
 969                 rx_status.flag |= RX_FLAG_40MHZ;
 970         if (rate_n_flags & RATE_MCS_SGI_MSK)
 971                 rx_status.flag |= RX_FLAG_SHORT_GI;
 972         if (rate_n_flags & RATE_MCS_GF_MSK)
 973                 rx_status.flag |= RX_FLAG_HT_GF;
 974
 975         iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
 976                                     rxb, &rx_status);
 977 }
 978
 979 static void iwlagn_rx_noa_notification(struct iwl_priv *priv,
 980                                        struct iwl_rx_cmd_buffer *rxb)
 981 {
 982         struct iwl_wipan_noa_data *new_data, *old_data;
 983         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 984         struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
 985
 986         /* no condition -- we're in softirq */
 987         old_data = rcu_dereference_protected(priv->noa_data, true);
 988
 989         if (noa_notif->noa_active) {
 990                 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
 991                 u32 copylen = len;
 992
 993                 /* EID, len, OUI, subtype */
 994                 len += 1 + 1 + 3 + 1;
 995                 /* P2P id, P2P length */
 996                 len += 1 + 2;
 997                 copylen += 1 + 2;
 998
 999                 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1000                 if (new_data) {
1001                         new_data->length = len;
1002                         new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1003                         new_data->data[1] = len - 2; /* not counting EID, len */
1004                         new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1005                         new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1006                         new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1007                         new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1008                         memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1009                                copylen);
1010                 }
1011         } else
1012                 new_data = NULL;
1013
1014         rcu_assign_pointer(priv->noa_data, new_data);
1015
1016         if (old_data)
1017                 kfree_rcu(old_data, rcu_head);
1018 }
1019
1020 /**
1021  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1022  *
1023  * Setup the RX handlers for each of the reply types sent from the uCode
1024  * to the host.
1025  */
1026 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1027 {
1028         void (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb);
1029
1030         handlers = priv->rx_handlers;
1031
1032         handlers[REPLY_ERROR]                   = iwlagn_rx_reply_error;
1033         handlers[CHANNEL_SWITCH_NOTIFICATION]   = iwlagn_rx_csa;
1034         handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1035                 iwlagn_rx_spectrum_measure_notif;
1036         handlers[PM_SLEEP_NOTIFICATION]         = iwlagn_rx_pm_sleep_notif;
1037         handlers[PM_DEBUG_STATISTIC_NOTIFIC]    =
1038                 iwlagn_rx_pm_debug_statistics_notif;
1039         handlers[BEACON_NOTIFICATION]           = iwlagn_rx_beacon_notif;
1040         handlers[REPLY_ADD_STA]                 = iwl_add_sta_callback;
1041
1042         handlers[REPLY_WIPAN_NOA_NOTIFICATION]  = iwlagn_rx_noa_notification;
1043
1044         /*
1045          * The same handler is used for both the REPLY to a discrete
1046          * statistics request from the host as well as for the periodic
1047          * statistics notifications (after received beacons) from the uCode.
1048          */
1049         handlers[REPLY_STATISTICS_CMD]          = iwlagn_rx_reply_statistics;
1050         handlers[STATISTICS_NOTIFICATION]       = iwlagn_rx_statistics;
1051
1052         iwl_setup_rx_scan_handlers(priv);
1053
1054         handlers[CARD_STATE_NOTIFICATION]       = iwlagn_rx_card_state_notif;
1055         handlers[MISSED_BEACONS_NOTIFICATION]   =
1056                 iwlagn_rx_missed_beacon_notif;
1057
1058         /* Rx handlers */
1059         handlers[REPLY_RX_PHY_CMD]              = iwlagn_rx_reply_rx_phy;
1060         handlers[REPLY_RX_MPDU_CMD]             = iwlagn_rx_reply_rx;
1061
1062         /* block ack */
1063         handlers[REPLY_COMPRESSED_BA]           =
1064                 iwlagn_rx_reply_compressed_ba;
1065
1066         priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1067
1068         /* set up notification wait support */
1069         iwl_notification_wait_init(&priv->notif_wait);
1070
1071         /* Set up BT Rx handlers */
1072         if (priv->lib->bt_params)
1073                 iwlagn_bt_rx_handler_setup(priv);
1074 }
1075
1076 void iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb)
1077 {
1078         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1079         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1080
1081         /*
1082          * Do the notification wait before RX handlers so
1083          * even if the RX handler consumes the RXB we have
1084          * access to it in the notification wait entry.
1085          */
1086         iwl_notification_wait_notify(&priv->notif_wait, pkt);
1087
1088         /* Based on type of command response or notification,
1089          *   handle those that need handling via function in
1090          *   rx_handlers table.  See iwl_setup_rx_handlers() */
1091         if (priv->rx_handlers[pkt->hdr.cmd]) {
1092                 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1093                 priv->rx_handlers[pkt->hdr.cmd](priv, rxb);
1094         } else {
1095                 /* No handling needed */
1096                 IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1097                              iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1098                              pkt->hdr.cmd);
1099         }
1100 }