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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 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 *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 =
 209                 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 210         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
 211                         "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
 212         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
 213         return 0;
 214 }
 215
 216 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
 217                                 struct iwl_rx_cmd_buffer *rxb,
 218                                 struct iwl_device_cmd *cmd)
 219 {
 220         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 221         struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
 222 #ifdef CONFIG_IWLWIFI_DEBUG
 223         u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
 224         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 225
 226         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
 227                 "tsf:0x%.8x%.8x rate:%d\n",
 228                 status & TX_STATUS_MSK,
 229                 beacon->beacon_notify_hdr.failure_frame,
 230                 le32_to_cpu(beacon->ibss_mgr_status),
 231                 le32_to_cpu(beacon->high_tsf),
 232                 le32_to_cpu(beacon->low_tsf), rate);
 233 #endif
 234
 235         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 236
 237         return 0;
 238 }
 239
 240 /**
 241  * iwl_good_plcp_health - checks for plcp error.
 242  *
 243  * When the plcp error is exceeding the thresholds, reset the radio
 244  * to improve the throughput.
 245  */
 246 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
 247                                  struct statistics_rx_phy *cur_ofdm,
 248                                  struct statistics_rx_ht_phy *cur_ofdm_ht,
 249                                  unsigned int msecs)
 250 {
 251         int delta;
 252         int threshold = priv->plcp_delta_threshold;
 253
 254         if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
 255                 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
 256                 return true;
 257         }
 258
 259         delta = le32_to_cpu(cur_ofdm->plcp_err) -
 260                 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
 261                 le32_to_cpu(cur_ofdm_ht->plcp_err) -
 262                 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
 263
 264         /* Can be negative if firmware reset statistics */
 265         if (delta <= 0)
 266                 return true;
 267
 268         if ((delta * 100 / msecs) > threshold) {
 269                 IWL_DEBUG_RADIO(priv,
 270                                 "plcp health threshold %u delta %d msecs %u\n",
 271                                 threshold, delta, msecs);
 272                 return false;
 273         }
 274
 275         return true;
 276 }
 277
 278 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
 279 {
 280         struct iwl_rf_reset *rf_reset;
 281
 282         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 283                 return -EAGAIN;
 284
 285         if (!iwl_is_any_associated(priv)) {
 286                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
 287                 return -ENOLINK;
 288         }
 289
 290         rf_reset = &priv->rf_reset;
 291         rf_reset->reset_request_count++;
 292         if (!external && rf_reset->last_reset_jiffies &&
 293             time_after(rf_reset->last_reset_jiffies +
 294                        IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
 295                 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
 296                 rf_reset->reset_reject_count++;
 297                 return -EAGAIN;
 298         }
 299         rf_reset->reset_success_count++;
 300         rf_reset->last_reset_jiffies = jiffies;
 301
 302         /*
 303          * There is no easy and better way to force reset the radio,
 304          * the only known method is switching channel which will force to
 305          * reset and tune the radio.
 306          * Use internal short scan (single channel) operation to should
 307          * achieve this objective.
 308          * Driver should reset the radio when number of consecutive missed
 309          * beacon, or any other uCode error condition detected.
 310          */
 311         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
 312         iwl_internal_short_hw_scan(priv);
 313         return 0;
 314 }
 315
 316
 317 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
 318                                 struct statistics_rx_phy *cur_ofdm,
 319                                 struct statistics_rx_ht_phy *cur_ofdm_ht,
 320                                 struct statistics_tx *tx,
 321                                 unsigned long stamp)
 322 {
 323         unsigned int msecs;
 324
 325         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 326                 return;
 327
 328         msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
 329
 330         /* Only gather statistics and update time stamp when not associated */
 331         if (!iwl_is_any_associated(priv))
 332                 return;
 333
 334         /* Do not check/recover when do not have enough statistics data */
 335         if (msecs < 99)
 336                 return;
 337
 338         if (iwlwifi_mod_params.plcp_check &&
 339             !iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
 340                 iwl_force_rf_reset(priv, false);
 341 }
 342
 343 /* Calculate noise level, based on measurements during network silence just
 344  *   before arriving beacon.  This measurement can be done only if we know
 345  *   exactly when to expect beacons, therefore only when we're associated. */
 346 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
 347 {
 348         struct statistics_rx_non_phy *rx_info;
 349         int num_active_rx = 0;
 350         int total_silence = 0;
 351         int bcn_silence_a, bcn_silence_b, bcn_silence_c;
 352         int last_rx_noise;
 353
 354         rx_info = &priv->statistics.rx_non_phy;
 355
 356         bcn_silence_a =
 357                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
 358         bcn_silence_b =
 359                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
 360         bcn_silence_c =
 361                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
 362
 363         if (bcn_silence_a) {
 364                 total_silence += bcn_silence_a;
 365                 num_active_rx++;
 366         }
 367         if (bcn_silence_b) {
 368                 total_silence += bcn_silence_b;
 369                 num_active_rx++;
 370         }
 371         if (bcn_silence_c) {
 372                 total_silence += bcn_silence_c;
 373                 num_active_rx++;
 374         }
 375
 376         /* Average among active antennas */
 377         if (num_active_rx)
 378                 last_rx_noise = (total_silence / num_active_rx) - 107;
 379         else
 380                 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 381
 382         IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
 383                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
 384                         last_rx_noise);
 385 }
 386
 387 #ifdef CONFIG_IWLWIFI_DEBUGFS
 388 /*
 389  *  based on the assumption of all statistics counter are in DWORD
 390  *  FIXME: This function is for debugging, do not deal with
 391  *  the case of counters roll-over.
 392  */
 393 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
 394                         __le32 *max_delta, __le32 *accum, int size)
 395 {
 396         int i;
 397
 398         for (i = 0;
 399              i < size / sizeof(__le32);
 400              i++, prev++, cur++, delta++, max_delta++, accum++) {
 401                 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
 402                         *delta = cpu_to_le32(
 403                                 le32_to_cpu(*cur) - le32_to_cpu(*prev));
 404                         le32_add_cpu(accum, le32_to_cpu(*delta));
 405                         if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
 406                                 *max_delta = *delta;
 407                 }
 408         }
 409 }
 410
 411 static void
 412 iwlagn_accumulative_statistics(struct iwl_priv *priv,
 413                             struct statistics_general_common *common,
 414                             struct statistics_rx_non_phy *rx_non_phy,
 415                             struct statistics_rx_phy *rx_ofdm,
 416                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 417                             struct statistics_rx_phy *rx_cck,
 418                             struct statistics_tx *tx,
 419                             struct statistics_bt_activity *bt_activity)
 420 {
 421 #define ACCUM(_name)    \
 422         accum_stats((__le32 *)&priv->statistics._name,          \
 423                     (__le32 *)_name,                            \
 424                     (__le32 *)&priv->delta_stats._name,         \
 425                     (__le32 *)&priv->max_delta_stats._name,     \
 426                     (__le32 *)&priv->accum_stats._name,         \
 427                     sizeof(*_name));
 428
 429         ACCUM(common);
 430         ACCUM(rx_non_phy);
 431         ACCUM(rx_ofdm);
 432         ACCUM(rx_ofdm_ht);
 433         ACCUM(rx_cck);
 434         ACCUM(tx);
 435         if (bt_activity)
 436                 ACCUM(bt_activity);
 437 #undef ACCUM
 438 }
 439 #else
 440 static inline void
 441 iwlagn_accumulative_statistics(struct iwl_priv *priv,
 442                             struct statistics_general_common *common,
 443                             struct statistics_rx_non_phy *rx_non_phy,
 444                             struct statistics_rx_phy *rx_ofdm,
 445                             struct statistics_rx_ht_phy *rx_ofdm_ht,
 446                             struct statistics_rx_phy *rx_cck,
 447                             struct statistics_tx *tx,
 448                             struct statistics_bt_activity *bt_activity)
 449 {
 450 }
 451 #endif
 452
 453 static int iwlagn_rx_statistics(struct iwl_priv *priv,
 454                               struct iwl_rx_cmd_buffer *rxb,
 455                               struct iwl_device_cmd *cmd)
 456 {
 457         unsigned long stamp = jiffies;
 458         const int reg_recalib_period = 60;
 459         int change;
 460         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 461         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 462         __le32 *flag;
 463         struct statistics_general_common *common;
 464         struct statistics_rx_non_phy *rx_non_phy;
 465         struct statistics_rx_phy *rx_ofdm;
 466         struct statistics_rx_ht_phy *rx_ofdm_ht;
 467         struct statistics_rx_phy *rx_cck;
 468         struct statistics_tx *tx;
 469         struct statistics_bt_activity *bt_activity;
 470
 471         len -= sizeof(struct iwl_cmd_header); /* skip header */
 472
 473         IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
 474                      len);
 475
 476         spin_lock(&priv->statistics.lock);
 477
 478         if (len == sizeof(struct iwl_bt_notif_statistics)) {
 479                 struct iwl_bt_notif_statistics *stats;
 480                 stats = (void *)&pkt->data;
 481                 flag = &stats->flag;
 482                 common = &stats->general.common;
 483                 rx_non_phy = &stats->rx.general.common;
 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 = &stats->general.activity;
 489
 490 #ifdef CONFIG_IWLWIFI_DEBUGFS
 491                 /* handle this exception directly */
 492                 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
 493                 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
 494                              le32_to_cpu(stats->rx.general.num_bt_kills));
 495 #endif
 496         } else if (len == sizeof(struct iwl_notif_statistics)) {
 497                 struct iwl_notif_statistics *stats;
 498                 stats = (void *)&pkt->data;
 499                 flag = &stats->flag;
 500                 common = &stats->general.common;
 501                 rx_non_phy = &stats->rx.general;
 502                 rx_ofdm = &stats->rx.ofdm;
 503                 rx_ofdm_ht = &stats->rx.ofdm_ht;
 504                 rx_cck = &stats->rx.cck;
 505                 tx = &stats->tx;
 506                 bt_activity = NULL;
 507         } else {
 508                 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
 509                           len, sizeof(struct iwl_bt_notif_statistics),
 510                           sizeof(struct iwl_notif_statistics));
 511                 spin_unlock(&priv->statistics.lock);
 512                 return 0;
 513         }
 514
 515         change = common->temperature != priv->statistics.common.temperature ||
 516                  (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
 517                  (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
 518
 519         iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
 520                                     rx_ofdm_ht, rx_cck, tx, bt_activity);
 521
 522         iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
 523
 524         priv->statistics.flag = *flag;
 525         memcpy(&priv->statistics.common, common, sizeof(*common));
 526         memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
 527         memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
 528         memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
 529         memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
 530         memcpy(&priv->statistics.tx, tx, sizeof(*tx));
 531 #ifdef CONFIG_IWLWIFI_DEBUGFS
 532         if (bt_activity)
 533                 memcpy(&priv->statistics.bt_activity, bt_activity,
 534                         sizeof(*bt_activity));
 535 #endif
 536
 537         priv->rx_statistics_jiffies = stamp;
 538
 539         set_bit(STATUS_STATISTICS, &priv->status);
 540
 541         /* Reschedule the statistics timer to occur in
 542          * reg_recalib_period seconds to ensure we get a
 543          * thermal update even if the uCode doesn't give
 544          * us one */
 545         mod_timer(&priv->statistics_periodic, jiffies +
 546                   msecs_to_jiffies(reg_recalib_period * 1000));
 547
 548         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
 549             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
 550                 iwlagn_rx_calc_noise(priv);
 551                 queue_work(priv->workqueue, &priv->run_time_calib_work);
 552         }
 553         if (priv->lib->temperature && change)
 554                 priv->lib->temperature(priv);
 555
 556         spin_unlock(&priv->statistics.lock);
 557
 558         return 0;
 559 }
 560
 561 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
 562                                     struct iwl_rx_cmd_buffer *rxb,
 563                                     struct iwl_device_cmd *cmd)
 564 {
 565         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 566         struct iwl_notif_statistics *stats = (void *)pkt->data;
 567
 568         if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
 569 #ifdef CONFIG_IWLWIFI_DEBUGFS
 570                 memset(&priv->accum_stats, 0,
 571                         sizeof(priv->accum_stats));
 572                 memset(&priv->delta_stats, 0,
 573                         sizeof(priv->delta_stats));
 574                 memset(&priv->max_delta_stats, 0,
 575                         sizeof(priv->max_delta_stats));
 576 #endif
 577                 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
 578         }
 579         iwlagn_rx_statistics(priv, rxb, cmd);
 580         return 0;
 581 }
 582
 583 /* Handle notification from uCode that card's power state is changing
 584  * due to software, hardware, or critical temperature RFKILL */
 585 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
 586                                     struct iwl_rx_cmd_buffer *rxb,
 587                                     struct iwl_device_cmd *cmd)
 588 {
 589         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 590         struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
 591         u32 flags = le32_to_cpu(card_state_notif->flags);
 592         unsigned long status = priv->status;
 593
 594         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 595                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 596                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 597                           (flags & CT_CARD_DISABLED) ?
 598                           "Reached" : "Not reached");
 599
 600         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 601                      CT_CARD_DISABLED)) {
 602
 603                 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 604                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 605
 606                 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
 607                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 608
 609                 if (!(flags & RXON_CARD_DISABLED)) {
 610                         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 611                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 612                         iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
 613                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 614                 }
 615                 if (flags & CT_CARD_DISABLED)
 616                         iwl_tt_enter_ct_kill(priv);
 617         }
 618         if (!(flags & CT_CARD_DISABLED))
 619                 iwl_tt_exit_ct_kill(priv);
 620
 621         if (flags & HW_CARD_DISABLED)
 622                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 623         else
 624                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 625
 626
 627         if (!(flags & RXON_CARD_DISABLED))
 628                 iwl_scan_cancel(priv);
 629
 630         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 631              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 632                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 633                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 634         return 0;
 635 }
 636
 637 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
 638                                        struct iwl_rx_cmd_buffer *rxb,
 639                                        struct iwl_device_cmd *cmd)
 640
 641 {
 642         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 643         struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
 644
 645         if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
 646             priv->missed_beacon_threshold) {
 647                 IWL_DEBUG_CALIB(priv,
 648                     "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
 649                     le32_to_cpu(missed_beacon->consecutive_missed_beacons),
 650                     le32_to_cpu(missed_beacon->total_missed_becons),
 651                     le32_to_cpu(missed_beacon->num_recvd_beacons),
 652                     le32_to_cpu(missed_beacon->num_expected_beacons));
 653                 if (!test_bit(STATUS_SCANNING, &priv->status))
 654                         iwl_init_sensitivity(priv);
 655         }
 656         return 0;
 657 }
 658
 659 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
 660  * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
 661 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
 662                                 struct iwl_rx_cmd_buffer *rxb,
 663                                 struct iwl_device_cmd *cmd)
 664 {
 665         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 666
 667         priv->last_phy_res_valid = true;
 668         priv->ampdu_ref++;
 669         memcpy(&priv->last_phy_res, pkt->data,
 670                sizeof(struct iwl_rx_phy_res));
 671         return 0;
 672 }
 673
 674 /*
 675  * returns non-zero if packet should be dropped
 676  */
 677 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
 678                                   struct ieee80211_hdr *hdr,
 679                                   u32 decrypt_res,
 680                                   struct ieee80211_rx_status *stats)
 681 {
 682         u16 fc = le16_to_cpu(hdr->frame_control);
 683
 684         /*
 685          * All contexts have the same setting here due to it being
 686          * a module parameter, so OK to check any context.
 687          */
 688         if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
 689                                                 RXON_FILTER_DIS_DECRYPT_MSK)
 690                 return 0;
 691
 692         if (!(fc & IEEE80211_FCTL_PROTECTED))
 693                 return 0;
 694
 695         IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
 696         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
 697         case RX_RES_STATUS_SEC_TYPE_TKIP:
 698                 /* The uCode has got a bad phase 1 Key, pushes the packet.
 699                  * Decryption will be done in SW. */
 700                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 701                     RX_RES_STATUS_BAD_KEY_TTAK)
 702                         break;
 703
 704         case RX_RES_STATUS_SEC_TYPE_WEP:
 705                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 706                     RX_RES_STATUS_BAD_ICV_MIC) {
 707                         /* bad ICV, the packet is destroyed since the
 708                          * decryption is inplace, drop it */
 709                         IWL_DEBUG_RX(priv, "Packet destroyed\n");
 710                         return -1;
 711                 }
 712         case RX_RES_STATUS_SEC_TYPE_CCMP:
 713                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
 714                     RX_RES_STATUS_DECRYPT_OK) {
 715                         IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
 716                         stats->flag |= RX_FLAG_DECRYPTED;
 717                 }
 718                 break;
 719
 720         default:
 721                 break;
 722         }
 723         return 0;
 724 }
 725
 726 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
 727                                         struct ieee80211_hdr *hdr,
 728                                         u16 len,
 729                                         u32 ampdu_status,
 730                                         struct iwl_rx_cmd_buffer *rxb,
 731                                         struct ieee80211_rx_status *stats)
 732 {
 733         struct sk_buff *skb;
 734         __le16 fc = hdr->frame_control;
 735         struct iwl_rxon_context *ctx;
 736         unsigned int hdrlen, fraglen;
 737
 738         /* We only process data packets if the interface is open */
 739         if (unlikely(!priv->is_open)) {
 740                 IWL_DEBUG_DROP_LIMIT(priv,
 741                     "Dropping packet while interface is not open.\n");
 742                 return;
 743         }
 744
 745         /* In case of HW accelerated crypto and bad decryption, drop */
 746         if (!iwlwifi_mod_params.sw_crypto &&
 747             iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
 748                 return;
 749
 750         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 751          * ieee80211_hdr pulled.
 752          */
 753         skb = alloc_skb(128, GFP_ATOMIC);
 754         if (!skb) {
 755                 IWL_ERR(priv, "alloc_skb failed\n");
 756                 return;
 757         }
 758         /* If frame is small enough to fit in skb->head, pull it completely.
 759          * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
 760          * are more efficient.
 761          */
 762         hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
 763
 764         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 765         fraglen = len - hdrlen;
 766
 767         if (fraglen) {
 768                 int offset = (void *)hdr + hdrlen -
 769                              rxb_addr(rxb) + rxb_offset(rxb);
 770
 771                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 772                                 fraglen, rxb->truesize);
 773         }
 774
 775         /*
 776         * Wake any queues that were stopped due to a passive channel tx
 777         * failure. This can happen because the regulatory enforcement in
 778         * the device waits for a beacon before allowing transmission,
 779         * sometimes even after already having transmitted frames for the
 780         * association because the new RXON may reset the information.
 781         */
 782         if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
 783                 for_each_context(priv, ctx) {
 784                         if (!ether_addr_equal(hdr->addr3,
 785                                               ctx->active.bssid_addr))
 786                                 continue;
 787                         iwlagn_lift_passive_no_rx(priv);
 788                 }
 789         }
 790
 791         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 792
 793         ieee80211_rx(priv->hw, skb);
 794 }
 795
 796 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
 797 {
 798         u32 decrypt_out = 0;
 799
 800         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
 801                                         RX_RES_STATUS_STATION_FOUND)
 802                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
 803                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
 804
 805         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
 806
 807         /* packet was not encrypted */
 808         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 809                                         RX_RES_STATUS_SEC_TYPE_NONE)
 810                 return decrypt_out;
 811
 812         /* packet was encrypted with unknown alg */
 813         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
 814                                         RX_RES_STATUS_SEC_TYPE_ERR)
 815                 return decrypt_out;
 816
 817         /* decryption was not done in HW */
 818         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
 819                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
 820                 return decrypt_out;
 821
 822         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
 823
 824         case RX_RES_STATUS_SEC_TYPE_CCMP:
 825                 /* alg is CCM: check MIC only */
 826                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
 827                         /* Bad MIC */
 828                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 829                 else
 830                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 831
 832                 break;
 833
 834         case RX_RES_STATUS_SEC_TYPE_TKIP:
 835                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
 836                         /* Bad TTAK */
 837                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
 838                         break;
 839                 }
 840                 /* fall through if TTAK OK */
 841         default:
 842                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
 843                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
 844                 else
 845                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
 846                 break;
 847         }
 848
 849         IWL_DEBUG_RX(priv, "decrypt_in:0x%x  decrypt_out = 0x%x\n",
 850                                         decrypt_in, decrypt_out);
 851
 852         return decrypt_out;
 853 }
 854
 855 /* Calc max signal level (dBm) among 3 possible receivers */
 856 static int iwlagn_calc_rssi(struct iwl_priv *priv,
 857                              struct iwl_rx_phy_res *rx_resp)
 858 {
 859         /* data from PHY/DSP regarding signal strength, etc.,
 860          *   contents are always there, not configurable by host
 861          */
 862         struct iwlagn_non_cfg_phy *ncphy =
 863                 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
 864         u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
 865         u8 agc;
 866
 867         val  = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
 868         agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
 869
 870         /* Find max rssi among 3 possible receivers.
 871          * These values are measured by the digital signal processor (DSP).
 872          * They should stay fairly constant even as the signal strength varies,
 873          *   if the radio's automatic gain control (AGC) is working right.
 874          * AGC value (see below) will provide the "interesting" info.
 875          */
 876         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
 877         rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
 878                 IWLAGN_OFDM_RSSI_A_BIT_POS;
 879         rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
 880                 IWLAGN_OFDM_RSSI_B_BIT_POS;
 881         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
 882         rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
 883                 IWLAGN_OFDM_RSSI_C_BIT_POS;
 884
 885         max_rssi = max_t(u32, rssi_a, rssi_b);
 886         max_rssi = max_t(u32, max_rssi, rssi_c);
 887
 888         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
 889                 rssi_a, rssi_b, rssi_c, max_rssi, agc);
 890
 891         /* dBm = max_rssi dB - agc dB - constant.
 892          * Higher AGC (higher radio gain) means lower signal. */
 893         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
 894 }
 895
 896 /* Called for REPLY_RX_MPDU_CMD */
 897 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
 898                             struct iwl_rx_cmd_buffer *rxb,
 899                             struct iwl_device_cmd *cmd)
 900 {
 901         struct ieee80211_hdr *header;
 902         struct ieee80211_rx_status rx_status = {};
 903         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 904         struct iwl_rx_phy_res *phy_res;
 905         __le32 rx_pkt_status;
 906         struct iwl_rx_mpdu_res_start *amsdu;
 907         u32 len;
 908         u32 ampdu_status;
 909         u32 rate_n_flags;
 910
 911         if (!priv->last_phy_res_valid) {
 912                 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
 913                 return 0;
 914         }
 915         phy_res = &priv->last_phy_res;
 916         amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
 917         header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
 918         len = le16_to_cpu(amsdu->byte_count);
 919         rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
 920         ampdu_status = iwlagn_translate_rx_status(priv,
 921                                                   le32_to_cpu(rx_pkt_status));
 922
 923         if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
 924                 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
 925                                 phy_res->cfg_phy_cnt);
 926                 return 0;
 927         }
 928
 929         if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
 930             !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 931                 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
 932                                 le32_to_cpu(rx_pkt_status));
 933                 return 0;
 934         }
 935
 936         /* This will be used in several places later */
 937         rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
 938
 939         /* rx_status carries information about the packet to mac80211 */
 940         rx_status.mactime = le64_to_cpu(phy_res->timestamp);
 941         rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 942                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 943         rx_status.freq =
 944                 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
 945                                                rx_status.band);
 946         rx_status.rate_idx =
 947                 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
 948         rx_status.flag = 0;
 949
 950         /* TSF isn't reliable. In order to allow smooth user experience,
 951          * this W/A doesn't propagate it to the mac80211 */
 952         /*rx_status.flag |= RX_FLAG_MACTIME_START;*/
 953
 954         priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
 955
 956         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
 957         rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
 958
 959         IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
 960                 rx_status.signal, (unsigned long long)rx_status.mactime);
 961
 962         /*
 963          * "antenna number"
 964          *
 965          * It seems that the antenna field in the phy flags value
 966          * is actually a bit field. This is undefined by radiotap,
 967          * it wants an actual antenna number but I always get "7"
 968          * for most legacy frames I receive indicating that the
 969          * same frame was received on all three RX chains.
 970          *
 971          * I think this field should be removed in favor of a
 972          * new 802.11n radiotap field "RX chains" that is defined
 973          * as a bitmask.
 974          */
 975         rx_status.antenna =
 976                 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
 977                 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 978
 979         /* set the preamble flag if appropriate */
 980         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 981                 rx_status.flag |= RX_FLAG_SHORTPRE;
 982
 983         if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
 984                 /*
 985                  * We know which subframes of an A-MPDU belong
 986                  * together since we get a single PHY response
 987                  * from the firmware for all of them
 988                  */
 989                 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
 990                 rx_status.ampdu_reference = priv->ampdu_ref;
 991         }
 992
 993         /* Set up the HT phy flags */
 994         if (rate_n_flags & RATE_MCS_HT_MSK)
 995                 rx_status.flag |= RX_FLAG_HT;
 996         if (rate_n_flags & RATE_MCS_HT40_MSK)
 997                 rx_status.flag |= RX_FLAG_40MHZ;
 998         if (rate_n_flags & RATE_MCS_SGI_MSK)
 999                 rx_status.flag |= RX_FLAG_SHORT_GI;
1000         if (rate_n_flags & RATE_MCS_GF_MSK)
1001                 rx_status.flag |= RX_FLAG_HT_GF;
1002
1003         iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1004                                     rxb, &rx_status);
1005         return 0;
1006 }
1007
1008 static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1009                                       struct iwl_rx_cmd_buffer *rxb,
1010                                       struct iwl_device_cmd *cmd)
1011 {
1012         struct iwl_wipan_noa_data *new_data, *old_data;
1013         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1014         struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
1015
1016         /* no condition -- we're in softirq */
1017         old_data = rcu_dereference_protected(priv->noa_data, true);
1018
1019         if (noa_notif->noa_active) {
1020                 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1021                 u32 copylen = len;
1022
1023                 /* EID, len, OUI, subtype */
1024                 len += 1 + 1 + 3 + 1;
1025                 /* P2P id, P2P length */
1026                 len += 1 + 2;
1027                 copylen += 1 + 2;
1028
1029                 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1030                 if (new_data) {
1031                         new_data->length = len;
1032                         new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1033                         new_data->data[1] = len - 2; /* not counting EID, len */
1034                         new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1035                         new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1036                         new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1037                         new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1038                         memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1039                                copylen);
1040                 }
1041         } else
1042                 new_data = NULL;
1043
1044         rcu_assign_pointer(priv->noa_data, new_data);
1045
1046         if (old_data)
1047                 kfree_rcu(old_data, rcu_head);
1048
1049         return 0;
1050 }
1051
1052 /**
1053  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1054  *
1055  * Setup the RX handlers for each of the reply types sent from the uCode
1056  * to the host.
1057  */
1058 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1059 {
1060         int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1061                                struct iwl_device_cmd *cmd);
1062
1063         handlers = priv->rx_handlers;
1064
1065         handlers[REPLY_ERROR]                   = iwlagn_rx_reply_error;
1066         handlers[CHANNEL_SWITCH_NOTIFICATION]   = iwlagn_rx_csa;
1067         handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1068                 iwlagn_rx_spectrum_measure_notif;
1069         handlers[PM_SLEEP_NOTIFICATION]         = iwlagn_rx_pm_sleep_notif;
1070         handlers[PM_DEBUG_STATISTIC_NOTIFIC]    =
1071                 iwlagn_rx_pm_debug_statistics_notif;
1072         handlers[BEACON_NOTIFICATION]           = iwlagn_rx_beacon_notif;
1073         handlers[REPLY_ADD_STA]                 = iwl_add_sta_callback;
1074
1075         handlers[REPLY_WIPAN_NOA_NOTIFICATION]  = iwlagn_rx_noa_notification;
1076
1077         /*
1078          * The same handler is used for both the REPLY to a discrete
1079          * statistics request from the host as well as for the periodic
1080          * statistics notifications (after received beacons) from the uCode.
1081          */
1082         handlers[REPLY_STATISTICS_CMD]          = iwlagn_rx_reply_statistics;
1083         handlers[STATISTICS_NOTIFICATION]       = iwlagn_rx_statistics;
1084
1085         iwl_setup_rx_scan_handlers(priv);
1086
1087         handlers[CARD_STATE_NOTIFICATION]       = iwlagn_rx_card_state_notif;
1088         handlers[MISSED_BEACONS_NOTIFICATION]   =
1089                 iwlagn_rx_missed_beacon_notif;
1090
1091         /* Rx handlers */
1092         handlers[REPLY_RX_PHY_CMD]              = iwlagn_rx_reply_rx_phy;
1093         handlers[REPLY_RX_MPDU_CMD]             = iwlagn_rx_reply_rx;
1094
1095         /* block ack */
1096         handlers[REPLY_COMPRESSED_BA]           =
1097                 iwlagn_rx_reply_compressed_ba;
1098
1099         priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1100
1101         /* set up notification wait support */
1102         iwl_notification_wait_init(&priv->notif_wait);
1103
1104         /* Set up BT Rx handlers */
1105         if (priv->cfg->bt_params)
1106                 iwlagn_bt_rx_handler_setup(priv);
1107 }
1108
1109 int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1110                     struct iwl_device_cmd *cmd)
1111 {
1112         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1113         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1114         int err = 0;
1115
1116         /*
1117          * Do the notification wait before RX handlers so
1118          * even if the RX handler consumes the RXB we have
1119          * access to it in the notification wait entry.
1120          */
1121         iwl_notification_wait_notify(&priv->notif_wait, pkt);
1122
1123 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
1124         /*
1125          * RX data may be forwarded to userspace in one
1126          * of two cases: the user owns the fw through testmode or when
1127          * the user requested to monitor the rx w/o affecting the regular flow.
1128          * In these cases the iwl_test object will handle forwarding the rx
1129          * data to user space.
1130          * Note that if the ownership flag != IWL_OWNERSHIP_TM the flow
1131          * continues.
1132          */
1133         iwl_test_rx(&priv->tst, rxb);
1134 #endif
1135
1136         if (priv->ucode_owner != IWL_OWNERSHIP_TM) {
1137                 /* Based on type of command response or notification,
1138                  *   handle those that need handling via function in
1139                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1140                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1141                         priv->rx_handlers_stats[pkt->hdr.cmd]++;
1142                         err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1143                 } else {
1144                         /* No handling needed */
1145                         IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1146                                      iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1147                                      pkt->hdr.cmd);
1148                 }
1149         }
1150         return err;
1151 }