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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <net/mac80211.h>
  35
  36 #include "iwl-eeprom.h"
  37 #include "iwl-dev.h" /* FIXME: remove */
  38 #include "iwl-debug.h"
  39 #include "iwl-core.h"
  40 #include "iwl-io.h"
  41 #include "iwl-power.h"
  42 #include "iwl-sta.h"
  43 #include "iwl-helpers.h"
  44
  45
  46 MODULE_DESCRIPTION("iwl core");
  47 MODULE_VERSION(IWLWIFI_VERSION);
  48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * set bt_coex_active to true, uCode will do kill/defer
  53  * every time the priority line is asserted (BT is sending signals on the
  54  * priority line in the PCIx).
  55  * set bt_coex_active to false, uCode will ignore the BT activity and
  56  * perform the normal operation
  57  *
  58  * User might experience transmit issue on some platform due to WiFi/BT
  59  * co-exist problem. The possible behaviors are:
  60  *   Able to scan and finding all the available AP
  61  *   Not able to associate with any AP
  62  * On those platforms, WiFi communication can be restored by set
  63  * "bt_coex_active" module parameter to "false"
  64  *
  65  * default: bt_coex_active = true (BT_COEX_ENABLE)
  66  */
  67 static bool bt_coex_active = true;
  68 module_param(bt_coex_active, bool, S_IRUGO);
  69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  70
  71 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  72         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  73                                     IWL_RATE_SISO_##s##M_PLCP, \
  74                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  75                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  76                                     IWL_RATE_##r##M_IEEE,      \
  77                                     IWL_RATE_##ip##M_INDEX,    \
  78                                     IWL_RATE_##in##M_INDEX,    \
  79                                     IWL_RATE_##rp##M_INDEX,    \
  80                                     IWL_RATE_##rn##M_INDEX,    \
  81                                     IWL_RATE_##pp##M_INDEX,    \
  82                                     IWL_RATE_##np##M_INDEX }
  83
  84 u32 iwl_debug_level;
  85 EXPORT_SYMBOL(iwl_debug_level);
  86
  87 /*
  88  * Parameter order:
  89  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  90  *
  91  * If there isn't a valid next or previous rate then INV is used which
  92  * maps to IWL_RATE_INVALID
  93  *
  94  */
  95 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  96         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  97         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  98         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  99         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 100         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 101         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 102         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 103         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 104         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 105         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 106         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 107         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 108         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 109         /* FIXME:RS:          ^^    should be INV (legacy) */
 110 };
 111 EXPORT_SYMBOL(iwl_rates);
 112
 113 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 114 {
 115         int idx = 0;
 116
 117         /* HT rate format */
 118         if (rate_n_flags & RATE_MCS_HT_MSK) {
 119                 idx = (rate_n_flags & 0xff);
 120
 121                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 122                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 123                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 124                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 125
 126                 idx += IWL_FIRST_OFDM_RATE;
 127                 /* skip 9M not supported in ht*/
 128                 if (idx >= IWL_RATE_9M_INDEX)
 129                         idx += 1;
 130                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 131                         return idx;
 132
 133         /* legacy rate format, search for match in table */
 134         } else {
 135                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 136                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 137                                 return idx;
 138         }
 139
 140         return -1;
 141 }
 142 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 143
 144 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
 145 {
 146         int i;
 147         u8 ind = ant;
 148
 149         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 150                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 151                 if (valid & BIT(ind))
 152                         return ind;
 153         }
 154         return ant;
 155 }
 156 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 157
 158 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 159 EXPORT_SYMBOL(iwl_bcast_addr);
 160
 161
 162 /* This function both allocates and initializes hw and priv. */
 163 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 164                 struct ieee80211_ops *hw_ops)
 165 {
 166         struct iwl_priv *priv;
 167
 168         /* mac80211 allocates memory for this device instance, including
 169          *   space for this driver's private structure */
 170         struct ieee80211_hw *hw =
 171                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 172         if (hw == NULL) {
 173                 pr_err("%s: Can not allocate network device\n",
 174                        cfg->name);
 175                 goto out;
 176         }
 177
 178         priv = hw->priv;
 179         priv->hw = hw;
 180
 181 out:
 182         return hw;
 183 }
 184 EXPORT_SYMBOL(iwl_alloc_all);
 185
 186 void iwl_hw_detect(struct iwl_priv *priv)
 187 {
 188         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 189         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 190         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 191 }
 192 EXPORT_SYMBOL(iwl_hw_detect);
 193
 194 /*
 195  * QoS  support
 196 */
 197 static void iwl_update_qos(struct iwl_priv *priv)
 198 {
 199         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 200                 return;
 201
 202         priv->qos_data.def_qos_parm.qos_flags = 0;
 203
 204         if (priv->qos_data.qos_active)
 205                 priv->qos_data.def_qos_parm.qos_flags |=
 206                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 207
 208         if (priv->current_ht_config.is_ht)
 209                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 210
 211         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 212                       priv->qos_data.qos_active,
 213                       priv->qos_data.def_qos_parm.qos_flags);
 214
 215         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 216                                sizeof(struct iwl_qosparam_cmd),
 217                                &priv->qos_data.def_qos_parm, NULL);
 218 }
 219
 220 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 221 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 222 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 223                               struct ieee80211_sta_ht_cap *ht_info,
 224                               enum ieee80211_band band)
 225 {
 226         u16 max_bit_rate = 0;
 227         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 228         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 229
 230         ht_info->cap = 0;
 231         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 232
 233         ht_info->ht_supported = true;
 234
 235         if (priv->cfg->ht_greenfield_support)
 236                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 237         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 238         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 239         if (priv->hw_params.ht40_channel & BIT(band)) {
 240                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 241                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 242                 ht_info->mcs.rx_mask[4] = 0x01;
 243                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 244         }
 245
 246         if (priv->cfg->mod_params->amsdu_size_8K)
 247                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 248
 249         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 250         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 251
 252         ht_info->mcs.rx_mask[0] = 0xFF;
 253         if (rx_chains_num >= 2)
 254                 ht_info->mcs.rx_mask[1] = 0xFF;
 255         if (rx_chains_num >= 3)
 256                 ht_info->mcs.rx_mask[2] = 0xFF;
 257
 258         /* Highest supported Rx data rate */
 259         max_bit_rate *= rx_chains_num;
 260         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 261         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 262
 263         /* Tx MCS capabilities */
 264         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 265         if (tx_chains_num != rx_chains_num) {
 266                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 267                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 268                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 269         }
 270 }
 271
 272 /**
 273  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 274  */
 275 int iwlcore_init_geos(struct iwl_priv *priv)
 276 {
 277         struct iwl_channel_info *ch;
 278         struct ieee80211_supported_band *sband;
 279         struct ieee80211_channel *channels;
 280         struct ieee80211_channel *geo_ch;
 281         struct ieee80211_rate *rates;
 282         int i = 0;
 283
 284         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 285             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 286                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 287                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 288                 return 0;
 289         }
 290
 291         channels = kzalloc(sizeof(struct ieee80211_channel) *
 292                            priv->channel_count, GFP_KERNEL);
 293         if (!channels)
 294                 return -ENOMEM;
 295
 296         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 297                         GFP_KERNEL);
 298         if (!rates) {
 299                 kfree(channels);
 300                 return -ENOMEM;
 301         }
 302
 303         /* 5.2GHz channels start after the 2.4GHz channels */
 304         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 305         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 306         /* just OFDM */
 307         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 308         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 309
 310         if (priv->cfg->sku & IWL_SKU_N)
 311                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 312                                          IEEE80211_BAND_5GHZ);
 313
 314         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 315         sband->channels = channels;
 316         /* OFDM & CCK */
 317         sband->bitrates = rates;
 318         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 319
 320         if (priv->cfg->sku & IWL_SKU_N)
 321                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 322                                          IEEE80211_BAND_2GHZ);
 323
 324         priv->ieee_channels = channels;
 325         priv->ieee_rates = rates;
 326
 327         for (i = 0;  i < priv->channel_count; i++) {
 328                 ch = &priv->channel_info[i];
 329
 330                 /* FIXME: might be removed if scan is OK */
 331                 if (!is_channel_valid(ch))
 332                         continue;
 333
 334                 if (is_channel_a_band(ch))
 335                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 336                 else
 337                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 338
 339                 geo_ch = &sband->channels[sband->n_channels++];
 340
 341                 geo_ch->center_freq =
 342                                 ieee80211_channel_to_frequency(ch->channel);
 343                 geo_ch->max_power = ch->max_power_avg;
 344                 geo_ch->max_antenna_gain = 0xff;
 345                 geo_ch->hw_value = ch->channel;
 346
 347                 if (is_channel_valid(ch)) {
 348                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 349                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 350
 351                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 352                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 353
 354                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 355                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 356
 357                         geo_ch->flags |= ch->ht40_extension_channel;
 358
 359                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 360                                 priv->tx_power_device_lmt = ch->max_power_avg;
 361                 } else {
 362                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 363                 }
 364
 365                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 366                                 ch->channel, geo_ch->center_freq,
 367                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 368                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 369                                 "restricted" : "valid",
 370                                  geo_ch->flags);
 371         }
 372
 373         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 374              priv->cfg->sku & IWL_SKU_A) {
 375                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 376                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 377                            priv->pci_dev->device,
 378                            priv->pci_dev->subsystem_device);
 379                 priv->cfg->sku &= ~IWL_SKU_A;
 380         }
 381
 382         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 383                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 384                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 385
 386         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 387
 388         return 0;
 389 }
 390 EXPORT_SYMBOL(iwlcore_init_geos);
 391
 392 /*
 393  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 394  */
 395 void iwlcore_free_geos(struct iwl_priv *priv)
 396 {
 397         kfree(priv->ieee_channels);
 398         kfree(priv->ieee_rates);
 399         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 400 }
 401 EXPORT_SYMBOL(iwlcore_free_geos);
 402
 403 /*
 404  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 405  *  function.
 406  */
 407 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 408                                 __le32 *tx_flags)
 409 {
 410         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 411                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 412                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 413         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 414                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 415                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 416         }
 417 }
 418 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 419
 420 static bool is_single_rx_stream(struct iwl_priv *priv)
 421 {
 422         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 423                priv->current_ht_config.single_chain_sufficient;
 424 }
 425
 426 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 427                                    enum ieee80211_band band,
 428                                    u16 channel, u8 extension_chan_offset)
 429 {
 430         const struct iwl_channel_info *ch_info;
 431
 432         ch_info = iwl_get_channel_info(priv, band, channel);
 433         if (!is_channel_valid(ch_info))
 434                 return 0;
 435
 436         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 437                 return !(ch_info->ht40_extension_channel &
 438                                         IEEE80211_CHAN_NO_HT40PLUS);
 439         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 440                 return !(ch_info->ht40_extension_channel &
 441                                         IEEE80211_CHAN_NO_HT40MINUS);
 442
 443         return 0;
 444 }
 445
 446 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 447                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 448 {
 449         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 450
 451         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 452                 return 0;
 453
 454         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 455          * the bit will not set if it is pure 40MHz case
 456          */
 457         if (sta_ht_inf) {
 458                 if (!sta_ht_inf->ht_supported)
 459                         return 0;
 460         }
 461 #ifdef CONFIG_IWLWIFI_DEBUGFS
 462         if (priv->disable_ht40)
 463                 return 0;
 464 #endif
 465         return iwl_is_channel_extension(priv, priv->band,
 466                         le16_to_cpu(priv->staging_rxon.channel),
 467                         ht_conf->extension_chan_offset);
 468 }
 469 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 470
 471 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 472 {
 473         u16 new_val = 0;
 474         u16 beacon_factor = 0;
 475
 476         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 477         new_val = beacon_val / beacon_factor;
 478
 479         if (!new_val)
 480                 new_val = max_beacon_val;
 481
 482         return new_val;
 483 }
 484
 485 void iwl_setup_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif)
 486 {
 487         u64 tsf;
 488         s32 interval_tm, rem;
 489         unsigned long flags;
 490         struct ieee80211_conf *conf = NULL;
 491         u16 beacon_int;
 492
 493         conf = ieee80211_get_hw_conf(priv->hw);
 494
 495         spin_lock_irqsave(&priv->lock, flags);
 496         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 497         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 498
 499         beacon_int = vif->bss_conf.beacon_int;
 500
 501         if (vif->type == NL80211_IFTYPE_ADHOC) {
 502                 /* TODO: we need to get atim_window from upper stack
 503                  * for now we set to 0 */
 504                 priv->rxon_timing.atim_window = 0;
 505         } else {
 506                 priv->rxon_timing.atim_window = 0;
 507         }
 508
 509         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 510                                 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
 511         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 512
 513         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 514         interval_tm = beacon_int * TIME_UNIT;
 515         rem = do_div(tsf, interval_tm);
 516         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 517
 518         spin_unlock_irqrestore(&priv->lock, flags);
 519         IWL_DEBUG_ASSOC(priv,
 520                         "beacon interval %d beacon timer %d beacon tim %d\n",
 521                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 522                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 523                         le16_to_cpu(priv->rxon_timing.atim_window));
 524 }
 525 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 526
 527 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 528 {
 529         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 530
 531         if (hw_decrypt)
 532                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 533         else
 534                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 535
 536 }
 537 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 538
 539 /**
 540  * iwl_check_rxon_cmd - validate RXON structure is valid
 541  *
 542  * NOTE:  This is really only useful during development and can eventually
 543  * be #ifdef'd out once the driver is stable and folks aren't actively
 544  * making changes
 545  */
 546 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 547 {
 548         int error = 0;
 549         int counter = 1;
 550         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 551
 552         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 553                 error |= le32_to_cpu(rxon->flags &
 554                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 555                                  RXON_FLG_RADAR_DETECT_MSK));
 556                 if (error)
 557                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 558                                     counter++, error);
 559         } else {
 560                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 561                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 562                 if (error)
 563                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 564                                     counter++, error);
 565                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 566                 if (error)
 567                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 568                                     counter++, error);
 569         }
 570         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 571         if (error)
 572                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 573
 574         /* make sure basic rates 6Mbps and 1Mbps are supported */
 575         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 576                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 577         if (error)
 578                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 579
 580         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 581         if (error)
 582                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 583
 584         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 585                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 586         if (error)
 587                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 588                             counter++, error);
 589
 590         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 591                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 592         if (error)
 593                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 594                             counter++, error);
 595
 596         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 597                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 598         if (error)
 599                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 600                             counter++, error);
 601
 602         if (error)
 603                 IWL_WARN(priv, "Tuning to channel %d\n",
 604                             le16_to_cpu(rxon->channel));
 605
 606         if (error) {
 607                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 608                 return -1;
 609         }
 610         return 0;
 611 }
 612 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 613
 614 /**
 615  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 616  * @priv: staging_rxon is compared to active_rxon
 617  *
 618  * If the RXON structure is changing enough to require a new tune,
 619  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 620  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 621  */
 622 int iwl_full_rxon_required(struct iwl_priv *priv)
 623 {
 624
 625         /* These items are only settable from the full RXON command */
 626         if (!(iwl_is_associated(priv)) ||
 627             compare_ether_addr(priv->staging_rxon.bssid_addr,
 628                                priv->active_rxon.bssid_addr) ||
 629             compare_ether_addr(priv->staging_rxon.node_addr,
 630                                priv->active_rxon.node_addr) ||
 631             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 632                                priv->active_rxon.wlap_bssid_addr) ||
 633             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 634             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 635             (priv->staging_rxon.air_propagation !=
 636              priv->active_rxon.air_propagation) ||
 637             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 638              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 639             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 640              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 641             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 642              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 643             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 644                 return 1;
 645
 646         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 647          * be updated with the RXON_ASSOC command -- however only some
 648          * flag transitions are allowed using RXON_ASSOC */
 649
 650         /* Check if we are not switching bands */
 651         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 652             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 653                 return 1;
 654
 655         /* Check if we are switching association toggle */
 656         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 657                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 658                 return 1;
 659
 660         return 0;
 661 }
 662 EXPORT_SYMBOL(iwl_full_rxon_required);
 663
 664 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 665 {
 666         /*
 667          * Assign the lowest rate -- should really get this from
 668          * the beacon skb from mac80211.
 669          */
 670         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 671                 return IWL_RATE_1M_PLCP;
 672         else
 673                 return IWL_RATE_6M_PLCP;
 674 }
 675 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 676
 677 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 678 {
 679         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 680
 681         if (!ht_conf->is_ht) {
 682                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 683                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 684                         RXON_FLG_HT40_PROT_MSK |
 685                         RXON_FLG_HT_PROT_MSK);
 686                 return;
 687         }
 688
 689         /* FIXME: if the definition of ht_protection changed, the "translation"
 690          * will be needed for rxon->flags
 691          */
 692         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 693
 694         /* Set up channel bandwidth:
 695          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 696         /* clear the HT channel mode before set the mode */
 697         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 698                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 699         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 700                 /* pure ht40 */
 701                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 702                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 703                         /* Note: control channel is opposite of extension channel */
 704                         switch (ht_conf->extension_chan_offset) {
 705                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 706                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 707                                 break;
 708                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 709                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 710                                 break;
 711                         }
 712                 } else {
 713                         /* Note: control channel is opposite of extension channel */
 714                         switch (ht_conf->extension_chan_offset) {
 715                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 716                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 717                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 718                                 break;
 719                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 720                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 721                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 722                                 break;
 723                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 724                         default:
 725                                 /* channel location only valid if in Mixed mode */
 726                                 IWL_ERR(priv, "invalid extension channel offset\n");
 727                                 break;
 728                         }
 729                 }
 730         } else {
 731                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 732         }
 733
 734         if (priv->cfg->ops->hcmd->set_rxon_chain)
 735                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 736
 737         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 738                         "extension channel offset 0x%x\n",
 739                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 740                         ht_conf->extension_chan_offset);
 741 }
 742 EXPORT_SYMBOL(iwl_set_rxon_ht);
 743
 744 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 745 #define IWL_NUM_RX_CHAINS_SINGLE        2
 746 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 747 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 748
 749 /*
 750  * Determine how many receiver/antenna chains to use.
 751  *
 752  * More provides better reception via diversity.  Fewer saves power
 753  * at the expense of throughput, but only when not in powersave to
 754  * start with.
 755  *
 756  * MIMO (dual stream) requires at least 2, but works better with 3.
 757  * This does not determine *which* chains to use, just how many.
 758  */
 759 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 760 {
 761         /* # of Rx chains to use when expecting MIMO. */
 762         if (is_single_rx_stream(priv))
 763                 return IWL_NUM_RX_CHAINS_SINGLE;
 764         else
 765                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 766 }
 767
 768 /*
 769  * When we are in power saving mode, unless device support spatial
 770  * multiplexing power save, use the active count for rx chain count.
 771  */
 772 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 773 {
 774         /* # Rx chains when idling, depending on SMPS mode */
 775         switch (priv->current_ht_config.smps) {
 776         case IEEE80211_SMPS_STATIC:
 777         case IEEE80211_SMPS_DYNAMIC:
 778                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 779         case IEEE80211_SMPS_OFF:
 780                 return active_cnt;
 781         default:
 782                 WARN(1, "invalid SMPS mode %d",
 783                      priv->current_ht_config.smps);
 784                 return active_cnt;
 785         }
 786 }
 787
 788 /* up to 4 chains */
 789 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 790 {
 791         u8 res;
 792         res = (chain_bitmap & BIT(0)) >> 0;
 793         res += (chain_bitmap & BIT(1)) >> 1;
 794         res += (chain_bitmap & BIT(2)) >> 2;
 795         res += (chain_bitmap & BIT(3)) >> 3;
 796         return res;
 797 }
 798
 799 /**
 800  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 801  *
 802  * Selects how many and which Rx receivers/antennas/chains to use.
 803  * This should not be used for scan command ... it puts data in wrong place.
 804  */
 805 void iwl_set_rxon_chain(struct iwl_priv *priv)
 806 {
 807         bool is_single = is_single_rx_stream(priv);
 808         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 809         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 810         u32 active_chains;
 811         u16 rx_chain;
 812
 813         /* Tell uCode which antennas are actually connected.
 814          * Before first association, we assume all antennas are connected.
 815          * Just after first association, iwl_chain_noise_calibration()
 816          *    checks which antennas actually *are* connected. */
 817          if (priv->chain_noise_data.active_chains)
 818                 active_chains = priv->chain_noise_data.active_chains;
 819         else
 820                 active_chains = priv->hw_params.valid_rx_ant;
 821
 822         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 823
 824         /* How many receivers should we use? */
 825         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 826         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 827
 828
 829         /* correct rx chain count according hw settings
 830          * and chain noise calibration
 831          */
 832         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 833         if (valid_rx_cnt < active_rx_cnt)
 834                 active_rx_cnt = valid_rx_cnt;
 835
 836         if (valid_rx_cnt < idle_rx_cnt)
 837                 idle_rx_cnt = valid_rx_cnt;
 838
 839         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 840         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 841
 842         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 843
 844         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 845                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 846         else
 847                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 848
 849         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 850                         priv->staging_rxon.rx_chain,
 851                         active_rx_cnt, idle_rx_cnt);
 852
 853         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 854                 active_rx_cnt < idle_rx_cnt);
 855 }
 856 EXPORT_SYMBOL(iwl_set_rxon_chain);
 857
 858 /* Return valid channel */
 859 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 860                                   enum ieee80211_band band)
 861 {
 862         const struct iwl_channel_info *ch_info;
 863         int i;
 864         u8 channel = 0;
 865
 866         /* only scan single channel, good enough to reset the RF */
 867         /* pick the first valid not in-use channel */
 868         if (band == IEEE80211_BAND_5GHZ) {
 869                 for (i = 14; i < priv->channel_count; i++) {
 870                         if (priv->channel_info[i].channel !=
 871                             le16_to_cpu(priv->staging_rxon.channel)) {
 872                                 channel = priv->channel_info[i].channel;
 873                                 ch_info = iwl_get_channel_info(priv,
 874                                         band, channel);
 875                                 if (is_channel_valid(ch_info))
 876                                         break;
 877                         }
 878                 }
 879         } else {
 880                 for (i = 0; i < 14; i++) {
 881                         if (priv->channel_info[i].channel !=
 882                             le16_to_cpu(priv->staging_rxon.channel)) {
 883                                         channel =
 884                                                 priv->channel_info[i].channel;
 885                                         ch_info = iwl_get_channel_info(priv,
 886                                                 band, channel);
 887                                         if (is_channel_valid(ch_info))
 888                                                 break;
 889                         }
 890                 }
 891         }
 892
 893         return channel;
 894 }
 895 EXPORT_SYMBOL(iwl_get_single_channel_number);
 896
 897 /**
 898  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 899  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 900  * @channel: Any channel valid for the requested phymode
 901
 902  * In addition to setting the staging RXON, priv->phymode is also set.
 903  *
 904  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 905  * in the staging RXON flag structure based on the phymode
 906  */
 907 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 908 {
 909         enum ieee80211_band band = ch->band;
 910         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 911
 912         if (!iwl_get_channel_info(priv, band, channel)) {
 913                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 914                                channel, band);
 915                 return -EINVAL;
 916         }
 917
 918         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 919             (priv->band == band))
 920                 return 0;
 921
 922         priv->staging_rxon.channel = cpu_to_le16(channel);
 923         if (band == IEEE80211_BAND_5GHZ)
 924                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 925         else
 926                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 927
 928         priv->band = band;
 929
 930         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 931
 932         return 0;
 933 }
 934 EXPORT_SYMBOL(iwl_set_rxon_channel);
 935
 936 void iwl_set_flags_for_band(struct iwl_priv *priv,
 937                             enum ieee80211_band band,
 938                             struct ieee80211_vif *vif)
 939 {
 940         if (band == IEEE80211_BAND_5GHZ) {
 941                 priv->staging_rxon.flags &=
 942                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 943                       | RXON_FLG_CCK_MSK);
 944                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 945         } else {
 946                 /* Copied from iwl_post_associate() */
 947                 if (vif && vif->bss_conf.use_short_slot)
 948                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 949                 else
 950                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 951
 952                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 953                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 954                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 955         }
 956 }
 957 EXPORT_SYMBOL(iwl_set_flags_for_band);
 958
 959 /*
 960  * initialize rxon structure with default values from eeprom
 961  */
 962 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 963                                    struct ieee80211_vif *vif)
 964 {
 965         const struct iwl_channel_info *ch_info;
 966         enum nl80211_iftype type = NL80211_IFTYPE_STATION;
 967
 968         if (vif)
 969                 type = vif->type;
 970
 971         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 972
 973         switch (type) {
 974         case NL80211_IFTYPE_AP:
 975                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 976                 break;
 977
 978         case NL80211_IFTYPE_STATION:
 979                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 980                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 981                 break;
 982
 983         case NL80211_IFTYPE_ADHOC:
 984                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 985                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 986                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 987                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 988                 break;
 989
 990         default:
 991                 IWL_ERR(priv, "Unsupported interface type %d\n", type);
 992                 break;
 993         }
 994
 995 #if 0
 996         /* TODO:  Figure out when short_preamble would be set and cache from
 997          * that */
 998         if (!hw_to_local(priv->hw)->short_preamble)
 999                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1000         else
1001                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1002 #endif
1003
1004         ch_info = iwl_get_channel_info(priv, priv->band,
1005                                        le16_to_cpu(priv->active_rxon.channel));
1006
1007         if (!ch_info)
1008                 ch_info = &priv->channel_info[0];
1009
1010         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1011         priv->band = ch_info->band;
1012
1013         iwl_set_flags_for_band(priv, priv->band, vif);
1014
1015         priv->staging_rxon.ofdm_basic_rates =
1016             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1017         priv->staging_rxon.cck_basic_rates =
1018             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1019
1020         /* clear both MIX and PURE40 mode flag */
1021         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1022                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1023
1024         if (vif)
1025                 memcpy(priv->staging_rxon.node_addr, vif->addr, ETH_ALEN);
1026
1027         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1028         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1029         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1030 }
1031 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1032
1033 void iwl_set_rate(struct iwl_priv *priv)
1034 {
1035         const struct ieee80211_supported_band *hw = NULL;
1036         struct ieee80211_rate *rate;
1037         int i;
1038
1039         hw = iwl_get_hw_mode(priv, priv->band);
1040         if (!hw) {
1041                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1042                 return;
1043         }
1044
1045         priv->active_rate = 0;
1046
1047         for (i = 0; i < hw->n_bitrates; i++) {
1048                 rate = &(hw->bitrates[i]);
1049                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1050                         priv->active_rate |= (1 << rate->hw_value);
1051         }
1052
1053         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1054
1055         priv->staging_rxon.cck_basic_rates =
1056             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1057
1058         priv->staging_rxon.ofdm_basic_rates =
1059            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1060 }
1061 EXPORT_SYMBOL(iwl_set_rate);
1062
1063 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1064 {
1065         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1066                 return;
1067
1068         if (priv->switch_rxon.switch_in_progress) {
1069                 ieee80211_chswitch_done(priv->vif, is_success);
1070                 mutex_lock(&priv->mutex);
1071                 priv->switch_rxon.switch_in_progress = false;
1072                 mutex_unlock(&priv->mutex);
1073         }
1074 }
1075 EXPORT_SYMBOL(iwl_chswitch_done);
1076
1077 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1078 {
1079         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1080         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1081         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1082
1083         if (priv->switch_rxon.switch_in_progress) {
1084                 if (!le32_to_cpu(csa->status) &&
1085                     (csa->channel == priv->switch_rxon.channel)) {
1086                         rxon->channel = csa->channel;
1087                         priv->staging_rxon.channel = csa->channel;
1088                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1089                               le16_to_cpu(csa->channel));
1090                         iwl_chswitch_done(priv, true);
1091                 } else {
1092                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1093                               le16_to_cpu(csa->channel));
1094                         iwl_chswitch_done(priv, false);
1095                 }
1096         }
1097 }
1098 EXPORT_SYMBOL(iwl_rx_csa);
1099
1100 #ifdef CONFIG_IWLWIFI_DEBUG
1101 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1102 {
1103         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1104
1105         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1106         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1107         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1108         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1109         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1110                         le32_to_cpu(rxon->filter_flags));
1111         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1112         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1113                         rxon->ofdm_basic_rates);
1114         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1115         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1116         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1117         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1118 }
1119 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1120 #endif
1121 /**
1122  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1123  */
1124 void iwl_irq_handle_error(struct iwl_priv *priv)
1125 {
1126         /* Set the FW error flag -- cleared on iwl_down */
1127         set_bit(STATUS_FW_ERROR, &priv->status);
1128
1129         /* Cancel currently queued command. */
1130         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1131
1132         IWL_ERR(priv, "Loaded firmware version: %s\n",
1133                 priv->hw->wiphy->fw_version);
1134
1135         priv->cfg->ops->lib->dump_nic_error_log(priv);
1136         if (priv->cfg->ops->lib->dump_csr)
1137                 priv->cfg->ops->lib->dump_csr(priv);
1138         if (priv->cfg->ops->lib->dump_fh)
1139                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1140         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1141 #ifdef CONFIG_IWLWIFI_DEBUG
1142         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1143                 iwl_print_rx_config_cmd(priv);
1144 #endif
1145
1146         wake_up_interruptible(&priv->wait_command_queue);
1147
1148         /* Keep the restart process from trying to send host
1149          * commands by clearing the INIT status bit */
1150         clear_bit(STATUS_READY, &priv->status);
1151
1152         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1153                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1154                           "Restarting adapter due to uCode error.\n");
1155
1156                 if (priv->cfg->mod_params->restart_fw)
1157                         queue_work(priv->workqueue, &priv->restart);
1158         }
1159 }
1160 EXPORT_SYMBOL(iwl_irq_handle_error);
1161
1162 static int iwl_apm_stop_master(struct iwl_priv *priv)
1163 {
1164         int ret = 0;
1165
1166         /* stop device's busmaster DMA activity */
1167         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1168
1169         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1170                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1171         if (ret)
1172                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1173
1174         IWL_DEBUG_INFO(priv, "stop master\n");
1175
1176         return ret;
1177 }
1178
1179 void iwl_apm_stop(struct iwl_priv *priv)
1180 {
1181         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1182
1183         /* Stop device's DMA activity */
1184         iwl_apm_stop_master(priv);
1185
1186         /* Reset the entire device */
1187         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1188
1189         udelay(10);
1190
1191         /*
1192          * Clear "initialization complete" bit to move adapter from
1193          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1194          */
1195         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1196 }
1197 EXPORT_SYMBOL(iwl_apm_stop);
1198
1199
1200 /*
1201  * Start up NIC's basic functionality after it has been reset
1202  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1203  * NOTE:  This does not load uCode nor start the embedded processor
1204  */
1205 int iwl_apm_init(struct iwl_priv *priv)
1206 {
1207         int ret = 0;
1208         u16 lctl;
1209
1210         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1211
1212         /*
1213          * Use "set_bit" below rather than "write", to preserve any hardware
1214          * bits already set by default after reset.
1215          */
1216
1217         /* Disable L0S exit timer (platform NMI Work/Around) */
1218         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1219                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1220
1221         /*
1222          * Disable L0s without affecting L1;
1223          *  don't wait for ICH L0s (ICH bug W/A)
1224          */
1225         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1226                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1227
1228         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1229         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1230
1231         /*
1232          * Enable HAP INTA (interrupt from management bus) to
1233          * wake device's PCI Express link L1a -> L0s
1234          * NOTE:  This is no-op for 3945 (non-existant bit)
1235          */
1236         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1237                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1238
1239         /*
1240          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1241          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1242          * If so (likely), disable L0S, so device moves directly L0->L1;
1243          *    costs negligible amount of power savings.
1244          * If not (unlikely), enable L0S, so there is at least some
1245          *    power savings, even without L1.
1246          */
1247         if (priv->cfg->set_l0s) {
1248                 lctl = iwl_pcie_link_ctl(priv);
1249                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1250                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1251                         /* L1-ASPM enabled; disable(!) L0S  */
1252                         iwl_set_bit(priv, CSR_GIO_REG,
1253                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1254                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1255                 } else {
1256                         /* L1-ASPM disabled; enable(!) L0S */
1257                         iwl_clear_bit(priv, CSR_GIO_REG,
1258                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1259                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1260                 }
1261         }
1262
1263         /* Configure analog phase-lock-loop before activating to D0A */
1264         if (priv->cfg->pll_cfg_val)
1265                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1266
1267         /*
1268          * Set "initialization complete" bit to move adapter from
1269          * D0U* --> D0A* (powered-up active) state.
1270          */
1271         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1272
1273         /*
1274          * Wait for clock stabilization; once stabilized, access to
1275          * device-internal resources is supported, e.g. iwl_write_prph()
1276          * and accesses to uCode SRAM.
1277          */
1278         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1279                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1280                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1281         if (ret < 0) {
1282                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1283                 goto out;
1284         }
1285
1286         /*
1287          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1288          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1289          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1290          * and don't need BSM to restore data after power-saving sleep.
1291          *
1292          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1293          * do not disable clocks.  This preserves any hardware bits already
1294          * set by default in "CLK_CTRL_REG" after reset.
1295          */
1296         if (priv->cfg->use_bsm)
1297                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1298                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1299         else
1300                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1301                         APMG_CLK_VAL_DMA_CLK_RQT);
1302         udelay(20);
1303
1304         /* Disable L1-Active */
1305         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1306                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1307
1308 out:
1309         return ret;
1310 }
1311 EXPORT_SYMBOL(iwl_apm_init);
1312
1313
1314
1315 void iwl_configure_filter(struct ieee80211_hw *hw,
1316                           unsigned int changed_flags,
1317                           unsigned int *total_flags,
1318                           u64 multicast)
1319 {
1320         struct iwl_priv *priv = hw->priv;
1321         __le32 filter_or = 0, filter_nand = 0;
1322
1323 #define CHK(test, flag) do { \
1324         if (*total_flags & (test))              \
1325                 filter_or |= (flag);            \
1326         else                                    \
1327                 filter_nand |= (flag);          \
1328         } while (0)
1329
1330         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1331                         changed_flags, *total_flags);
1332
1333         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1334         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1335         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1336
1337 #undef CHK
1338
1339         mutex_lock(&priv->mutex);
1340
1341         priv->staging_rxon.filter_flags &= ~filter_nand;
1342         priv->staging_rxon.filter_flags |= filter_or;
1343
1344         iwlcore_commit_rxon(priv);
1345
1346         mutex_unlock(&priv->mutex);
1347
1348         /*
1349          * Receiving all multicast frames is always enabled by the
1350          * default flags setup in iwl_connection_init_rx_config()
1351          * since we currently do not support programming multicast
1352          * filters into the device.
1353          */
1354         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1355                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1356 }
1357 EXPORT_SYMBOL(iwl_configure_filter);
1358
1359 int iwl_set_hw_params(struct iwl_priv *priv)
1360 {
1361         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1362         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1363         if (priv->cfg->mod_params->amsdu_size_8K)
1364                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1365         else
1366                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1367
1368         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1369
1370         if (priv->cfg->mod_params->disable_11n)
1371                 priv->cfg->sku &= ~IWL_SKU_N;
1372
1373         /* Device-specific setup */
1374         return priv->cfg->ops->lib->set_hw_params(priv);
1375 }
1376 EXPORT_SYMBOL(iwl_set_hw_params);
1377
1378 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1379 {
1380         int ret = 0;
1381         s8 prev_tx_power = priv->tx_power_user_lmt;
1382
1383         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1384                 IWL_WARN(priv,
1385                          "Requested user TXPOWER %d below lower limit %d.\n",
1386                          tx_power,
1387                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1388                 return -EINVAL;
1389         }
1390
1391         if (tx_power > priv->tx_power_device_lmt) {
1392                 IWL_WARN(priv,
1393                         "Requested user TXPOWER %d above upper limit %d.\n",
1394                          tx_power, priv->tx_power_device_lmt);
1395                 return -EINVAL;
1396         }
1397
1398         if (priv->tx_power_user_lmt != tx_power)
1399                 force = true;
1400
1401         /* if nic is not up don't send command */
1402         if (iwl_is_ready_rf(priv)) {
1403                 priv->tx_power_user_lmt = tx_power;
1404                 if (force && priv->cfg->ops->lib->send_tx_power)
1405                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1406                 else if (!priv->cfg->ops->lib->send_tx_power)
1407                         ret = -EOPNOTSUPP;
1408                 /*
1409                  * if fail to set tx_power, restore the orig. tx power
1410                  */
1411                 if (ret)
1412                         priv->tx_power_user_lmt = prev_tx_power;
1413         }
1414
1415         /*
1416          * Even this is an async host command, the command
1417          * will always report success from uCode
1418          * So once driver can placing the command into the queue
1419          * successfully, driver can use priv->tx_power_user_lmt
1420          * to reflect the current tx power
1421          */
1422         return ret;
1423 }
1424 EXPORT_SYMBOL(iwl_set_tx_power);
1425
1426 irqreturn_t iwl_isr_legacy(int irq, void *data)
1427 {
1428         struct iwl_priv *priv = data;
1429         u32 inta, inta_mask;
1430         u32 inta_fh;
1431         unsigned long flags;
1432         if (!priv)
1433                 return IRQ_NONE;
1434
1435         spin_lock_irqsave(&priv->lock, flags);
1436
1437         /* Disable (but don't clear!) interrupts here to avoid
1438          *    back-to-back ISRs and sporadic interrupts from our NIC.
1439          * If we have something to service, the tasklet will re-enable ints.
1440          * If we *don't* have something, we'll re-enable before leaving here. */
1441         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1442         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1443
1444         /* Discover which interrupts are active/pending */
1445         inta = iwl_read32(priv, CSR_INT);
1446         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1447
1448         /* Ignore interrupt if there's nothing in NIC to service.
1449          * This may be due to IRQ shared with another device,
1450          * or due to sporadic interrupts thrown from our NIC. */
1451         if (!inta && !inta_fh) {
1452                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1453                 goto none;
1454         }
1455
1456         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1457                 /* Hardware disappeared. It might have already raised
1458                  * an interrupt */
1459                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1460                 goto unplugged;
1461         }
1462
1463         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1464                       inta, inta_mask, inta_fh);
1465
1466         inta &= ~CSR_INT_BIT_SCD;
1467
1468         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1469         if (likely(inta || inta_fh))
1470                 tasklet_schedule(&priv->irq_tasklet);
1471
1472  unplugged:
1473         spin_unlock_irqrestore(&priv->lock, flags);
1474         return IRQ_HANDLED;
1475
1476  none:
1477         /* re-enable interrupts here since we don't have anything to service. */
1478         /* only Re-enable if diabled by irq */
1479         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1480                 iwl_enable_interrupts(priv);
1481         spin_unlock_irqrestore(&priv->lock, flags);
1482         return IRQ_NONE;
1483 }
1484 EXPORT_SYMBOL(iwl_isr_legacy);
1485
1486 void iwl_send_bt_config(struct iwl_priv *priv)
1487 {
1488         struct iwl_bt_cmd bt_cmd = {
1489                 .lead_time = BT_LEAD_TIME_DEF,
1490                 .max_kill = BT_MAX_KILL_DEF,
1491                 .kill_ack_mask = 0,
1492                 .kill_cts_mask = 0,
1493         };
1494
1495         if (!bt_coex_active)
1496                 bt_cmd.flags = BT_COEX_DISABLE;
1497         else
1498                 bt_cmd.flags = BT_COEX_ENABLE;
1499
1500         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1501                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1502
1503         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1504                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1505                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1506 }
1507 EXPORT_SYMBOL(iwl_send_bt_config);
1508
1509 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1510 {
1511         struct iwl_statistics_cmd statistics_cmd = {
1512                 .configuration_flags =
1513                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1514         };
1515
1516         if (flags & CMD_ASYNC)
1517                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1518                                                sizeof(struct iwl_statistics_cmd),
1519                                                &statistics_cmd, NULL);
1520         else
1521                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1522                                         sizeof(struct iwl_statistics_cmd),
1523                                         &statistics_cmd);
1524 }
1525 EXPORT_SYMBOL(iwl_send_statistics_request);
1526
1527 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1528 {
1529         struct iwl_ct_kill_config cmd;
1530         struct iwl_ct_kill_throttling_config adv_cmd;
1531         unsigned long flags;
1532         int ret = 0;
1533
1534         spin_lock_irqsave(&priv->lock, flags);
1535         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1536                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1537         spin_unlock_irqrestore(&priv->lock, flags);
1538         priv->thermal_throttle.ct_kill_toggle = false;
1539
1540         if (priv->cfg->support_ct_kill_exit) {
1541                 adv_cmd.critical_temperature_enter =
1542                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1543                 adv_cmd.critical_temperature_exit =
1544                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1545
1546                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1547                                        sizeof(adv_cmd), &adv_cmd);
1548                 if (ret)
1549                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1550                 else
1551                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1552                                         "succeeded, "
1553                                         "critical temperature enter is %d,"
1554                                         "exit is %d\n",
1555                                        priv->hw_params.ct_kill_threshold,
1556                                        priv->hw_params.ct_kill_exit_threshold);
1557         } else {
1558                 cmd.critical_temperature_R =
1559                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1560
1561                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1562                                        sizeof(cmd), &cmd);
1563                 if (ret)
1564                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1565                 else
1566                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1567                                         "succeeded, "
1568                                         "critical temperature is %d\n",
1569                                         priv->hw_params.ct_kill_threshold);
1570         }
1571 }
1572 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1573
1574
1575 /*
1576  * CARD_STATE_CMD
1577  *
1578  * Use: Sets the device's internal card state to enable, disable, or halt
1579  *
1580  * When in the 'enable' state the card operates as normal.
1581  * When in the 'disable' state, the card enters into a low power mode.
1582  * When in the 'halt' state, the card is shut down and must be fully
1583  * restarted to come back on.
1584  */
1585 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1586 {
1587         struct iwl_host_cmd cmd = {
1588                 .id = REPLY_CARD_STATE_CMD,
1589                 .len = sizeof(u32),
1590                 .data = &flags,
1591                 .flags = meta_flag,
1592         };
1593
1594         return iwl_send_cmd(priv, &cmd);
1595 }
1596
1597 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1598                            struct iwl_rx_mem_buffer *rxb)
1599 {
1600 #ifdef CONFIG_IWLWIFI_DEBUG
1601         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1602         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1603         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1604                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1605 #endif
1606 }
1607 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1608
1609 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1610                                       struct iwl_rx_mem_buffer *rxb)
1611 {
1612         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1613         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1614         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1615                         "notification for %s:\n", len,
1616                         get_cmd_string(pkt->hdr.cmd));
1617         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1618 }
1619 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1620
1621 void iwl_rx_reply_error(struct iwl_priv *priv,
1622                         struct iwl_rx_mem_buffer *rxb)
1623 {
1624         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1625
1626         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1627                 "seq 0x%04X ser 0x%08X\n",
1628                 le32_to_cpu(pkt->u.err_resp.error_type),
1629                 get_cmd_string(pkt->u.err_resp.cmd_id),
1630                 pkt->u.err_resp.cmd_id,
1631                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1632                 le32_to_cpu(pkt->u.err_resp.error_info));
1633 }
1634 EXPORT_SYMBOL(iwl_rx_reply_error);
1635
1636 void iwl_clear_isr_stats(struct iwl_priv *priv)
1637 {
1638         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1639 }
1640
1641 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1642                            const struct ieee80211_tx_queue_params *params)
1643 {
1644         struct iwl_priv *priv = hw->priv;
1645         unsigned long flags;
1646         int q;
1647
1648         IWL_DEBUG_MAC80211(priv, "enter\n");
1649
1650         if (!iwl_is_ready_rf(priv)) {
1651                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1652                 return -EIO;
1653         }
1654
1655         if (queue >= AC_NUM) {
1656                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1657                 return 0;
1658         }
1659
1660         q = AC_NUM - 1 - queue;
1661
1662         spin_lock_irqsave(&priv->lock, flags);
1663
1664         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1665         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1666         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1667         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1668                         cpu_to_le16((params->txop * 32));
1669
1670         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1671
1672         spin_unlock_irqrestore(&priv->lock, flags);
1673
1674         IWL_DEBUG_MAC80211(priv, "leave\n");
1675         return 0;
1676 }
1677 EXPORT_SYMBOL(iwl_mac_conf_tx);
1678
1679 static void iwl_ht_conf(struct iwl_priv *priv,
1680                         struct ieee80211_vif *vif)
1681 {
1682         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1683         struct ieee80211_sta *sta;
1684         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1685
1686         IWL_DEBUG_MAC80211(priv, "enter:\n");
1687
1688         if (!ht_conf->is_ht)
1689                 return;
1690
1691         ht_conf->ht_protection =
1692                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1693         ht_conf->non_GF_STA_present =
1694                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1695
1696         ht_conf->single_chain_sufficient = false;
1697
1698         switch (vif->type) {
1699         case NL80211_IFTYPE_STATION:
1700                 rcu_read_lock();
1701                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1702                 if (sta) {
1703                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1704                         int maxstreams;
1705
1706                         maxstreams = (ht_cap->mcs.tx_params &
1707                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1708                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1709                         maxstreams += 1;
1710
1711                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1712                             (ht_cap->mcs.rx_mask[2] == 0))
1713                                 ht_conf->single_chain_sufficient = true;
1714                         if (maxstreams <= 1)
1715                                 ht_conf->single_chain_sufficient = true;
1716                 } else {
1717                         /*
1718                          * If at all, this can only happen through a race
1719                          * when the AP disconnects us while we're still
1720                          * setting up the connection, in that case mac80211
1721                          * will soon tell us about that.
1722                          */
1723                         ht_conf->single_chain_sufficient = true;
1724                 }
1725                 rcu_read_unlock();
1726                 break;
1727         case NL80211_IFTYPE_ADHOC:
1728                 ht_conf->single_chain_sufficient = true;
1729                 break;
1730         default:
1731                 break;
1732         }
1733
1734         IWL_DEBUG_MAC80211(priv, "leave\n");
1735 }
1736
1737 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1738 {
1739         iwl_led_disassociate(priv);
1740         /*
1741          * inform the ucode that there is no longer an
1742          * association and that no more packets should be
1743          * sent
1744          */
1745         priv->staging_rxon.filter_flags &=
1746                 ~RXON_FILTER_ASSOC_MSK;
1747         priv->staging_rxon.assoc_id = 0;
1748         iwlcore_commit_rxon(priv);
1749 }
1750
1751 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1752 {
1753         struct iwl_priv *priv = hw->priv;
1754         unsigned long flags;
1755         __le64 timestamp;
1756
1757         IWL_DEBUG_MAC80211(priv, "enter\n");
1758
1759         if (!iwl_is_ready_rf(priv)) {
1760                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1761                 return -EIO;
1762         }
1763
1764         spin_lock_irqsave(&priv->lock, flags);
1765
1766         if (priv->ibss_beacon)
1767                 dev_kfree_skb(priv->ibss_beacon);
1768
1769         priv->ibss_beacon = skb;
1770
1771         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1772         priv->timestamp = le64_to_cpu(timestamp);
1773
1774         IWL_DEBUG_MAC80211(priv, "leave\n");
1775         spin_unlock_irqrestore(&priv->lock, flags);
1776
1777         priv->cfg->ops->lib->post_associate(priv, priv->vif);
1778
1779         return 0;
1780 }
1781
1782 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1783                           struct ieee80211_vif *vif,
1784                           struct ieee80211_bss_conf *bss_conf,
1785                           u32 changes)
1786 {
1787         struct iwl_priv *priv = hw->priv;
1788         int ret;
1789
1790         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1791
1792         if (!iwl_is_alive(priv))
1793                 return;
1794
1795         mutex_lock(&priv->mutex);
1796
1797         if (changes & BSS_CHANGED_QOS) {
1798                 unsigned long flags;
1799
1800                 spin_lock_irqsave(&priv->lock, flags);
1801                 priv->qos_data.qos_active = bss_conf->qos;
1802                 iwl_update_qos(priv);
1803                 spin_unlock_irqrestore(&priv->lock, flags);
1804         }
1805
1806         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1807                 dev_kfree_skb(priv->ibss_beacon);
1808                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1809         }
1810
1811         if (changes & BSS_CHANGED_BEACON_INT) {
1812                 /* TODO: in AP mode, do something to make this take effect */
1813         }
1814
1815         if (changes & BSS_CHANGED_BSSID) {
1816                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1817
1818                 /*
1819                  * If there is currently a HW scan going on in the
1820                  * background then we need to cancel it else the RXON
1821                  * below/in post_associate will fail.
1822                  */
1823                 if (iwl_scan_cancel_timeout(priv, 100)) {
1824                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1825                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1826                         mutex_unlock(&priv->mutex);
1827                         return;
1828                 }
1829
1830                 /* mac80211 only sets assoc when in STATION mode */
1831                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1832                         memcpy(priv->staging_rxon.bssid_addr,
1833                                bss_conf->bssid, ETH_ALEN);
1834
1835                         /* currently needed in a few places */
1836                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1837                 } else {
1838                         priv->staging_rxon.filter_flags &=
1839                                 ~RXON_FILTER_ASSOC_MSK;
1840                 }
1841
1842         }
1843
1844         /*
1845          * This needs to be after setting the BSSID in case
1846          * mac80211 decides to do both changes at once because
1847          * it will invoke post_associate.
1848          */
1849         if (vif->type == NL80211_IFTYPE_ADHOC &&
1850             changes & BSS_CHANGED_BEACON) {
1851                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1852
1853                 if (beacon)
1854                         iwl_mac_beacon_update(hw, beacon);
1855         }
1856
1857         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1858                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1859                                    bss_conf->use_short_preamble);
1860                 if (bss_conf->use_short_preamble)
1861                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1862                 else
1863                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1864         }
1865
1866         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1867                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1868                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1869                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1870                 else
1871                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1872         }
1873
1874         if (changes & BSS_CHANGED_BASIC_RATES) {
1875                 /* XXX use this information
1876                  *
1877                  * To do that, remove code from iwl_set_rate() and put something
1878                  * like this here:
1879                  *
1880                 if (A-band)
1881                         priv->staging_rxon.ofdm_basic_rates =
1882                                 bss_conf->basic_rates;
1883                 else
1884                         priv->staging_rxon.ofdm_basic_rates =
1885                                 bss_conf->basic_rates >> 4;
1886                         priv->staging_rxon.cck_basic_rates =
1887                                 bss_conf->basic_rates & 0xF;
1888                  */
1889         }
1890
1891         if (changes & BSS_CHANGED_HT) {
1892                 iwl_ht_conf(priv, vif);
1893
1894                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1895                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1896         }
1897
1898         if (changes & BSS_CHANGED_ASSOC) {
1899                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1900                 if (bss_conf->assoc) {
1901                         priv->timestamp = bss_conf->timestamp;
1902
1903                         iwl_led_associate(priv);
1904
1905                         if (!iwl_is_rfkill(priv))
1906                                 priv->cfg->ops->lib->post_associate(priv, vif);
1907                 } else
1908                         iwl_set_no_assoc(priv);
1909         }
1910
1911         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1912                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1913                                    changes);
1914                 ret = iwl_send_rxon_assoc(priv);
1915                 if (!ret) {
1916                         /* Sync active_rxon with latest change. */
1917                         memcpy((void *)&priv->active_rxon,
1918                                 &priv->staging_rxon,
1919                                 sizeof(struct iwl_rxon_cmd));
1920                 }
1921         }
1922
1923         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1924                 if (vif->bss_conf.enable_beacon) {
1925                         memcpy(priv->staging_rxon.bssid_addr,
1926                                bss_conf->bssid, ETH_ALEN);
1927                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1928                         iwlcore_config_ap(priv, vif);
1929                 } else
1930                         iwl_set_no_assoc(priv);
1931         }
1932
1933         if (changes & BSS_CHANGED_IBSS) {
1934                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1935                                                         bss_conf->ibss_joined);
1936                 if (ret)
1937                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1938                                 bss_conf->ibss_joined ? "add" : "remove",
1939                                 bss_conf->bssid);
1940         }
1941
1942         mutex_unlock(&priv->mutex);
1943
1944         IWL_DEBUG_MAC80211(priv, "leave\n");
1945 }
1946 EXPORT_SYMBOL(iwl_bss_info_changed);
1947
1948 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1949 {
1950         iwl_connection_init_rx_config(priv, vif);
1951
1952         if (priv->cfg->ops->hcmd->set_rxon_chain)
1953                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1954
1955         return iwlcore_commit_rxon(priv);
1956 }
1957
1958 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1959 {
1960         struct iwl_priv *priv = hw->priv;
1961         int err = 0;
1962
1963         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1964                            vif->type, vif->addr);
1965
1966         mutex_lock(&priv->mutex);
1967
1968         if (WARN_ON(!iwl_is_ready_rf(priv))) {
1969                 err = -EINVAL;
1970                 goto out;
1971         }
1972
1973         if (priv->vif) {
1974                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
1975                 err = -EOPNOTSUPP;
1976                 goto out;
1977         }
1978
1979         priv->vif = vif;
1980         priv->iw_mode = vif->type;
1981
1982         err = iwl_set_mode(priv, vif);
1983         if (err)
1984                 goto out_err;
1985
1986         goto out;
1987
1988  out_err:
1989         priv->vif = NULL;
1990         priv->iw_mode = NL80211_IFTYPE_STATION;
1991  out:
1992         mutex_unlock(&priv->mutex);
1993
1994         IWL_DEBUG_MAC80211(priv, "leave\n");
1995         return err;
1996 }
1997 EXPORT_SYMBOL(iwl_mac_add_interface);
1998
1999 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2000                               struct ieee80211_vif *vif)
2001 {
2002         struct iwl_priv *priv = hw->priv;
2003         bool scan_completed = false;
2004
2005         IWL_DEBUG_MAC80211(priv, "enter\n");
2006
2007         mutex_lock(&priv->mutex);
2008
2009         if (iwl_is_ready_rf(priv)) {
2010                 iwl_scan_cancel_timeout(priv, 100);
2011                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2012                 iwlcore_commit_rxon(priv);
2013         }
2014         if (priv->vif == vif) {
2015                 priv->vif = NULL;
2016                 if (priv->scan_vif == vif) {
2017                         scan_completed = true;
2018                         priv->scan_vif = NULL;
2019                         priv->scan_request = NULL;
2020                 }
2021                 memset(priv->bssid, 0, ETH_ALEN);
2022         }
2023         mutex_unlock(&priv->mutex);
2024
2025         if (scan_completed)
2026                 ieee80211_scan_completed(priv->hw, true);
2027
2028         IWL_DEBUG_MAC80211(priv, "leave\n");
2029
2030 }
2031 EXPORT_SYMBOL(iwl_mac_remove_interface);
2032
2033 /**
2034  * iwl_mac_config - mac80211 config callback
2035  */
2036 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2037 {
2038         struct iwl_priv *priv = hw->priv;
2039         const struct iwl_channel_info *ch_info;
2040         struct ieee80211_conf *conf = &hw->conf;
2041         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2042         unsigned long flags = 0;
2043         int ret = 0;
2044         u16 ch;
2045         int scan_active = 0;
2046
2047         mutex_lock(&priv->mutex);
2048
2049         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2050                                         conf->channel->hw_value, changed);
2051
2052         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2053                         test_bit(STATUS_SCANNING, &priv->status))) {
2054                 scan_active = 1;
2055                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2056         }
2057
2058         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2059                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2060                 /* mac80211 uses static for non-HT which is what we want */
2061                 priv->current_ht_config.smps = conf->smps_mode;
2062
2063                 /*
2064                  * Recalculate chain counts.
2065                  *
2066                  * If monitor mode is enabled then mac80211 will
2067                  * set up the SM PS mode to OFF if an HT channel is
2068                  * configured.
2069                  */
2070                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2071                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2072         }
2073
2074         /* during scanning mac80211 will delay channel setting until
2075          * scan finish with changed = 0
2076          */
2077         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2078                 if (scan_active)
2079                         goto set_ch_out;
2080
2081                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2082                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2083                 if (!is_channel_valid(ch_info)) {
2084                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2085                         ret = -EINVAL;
2086                         goto set_ch_out;
2087                 }
2088
2089                 spin_lock_irqsave(&priv->lock, flags);
2090
2091                 /* Configure HT40 channels */
2092                 ht_conf->is_ht = conf_is_ht(conf);
2093                 if (ht_conf->is_ht) {
2094                         if (conf_is_ht40_minus(conf)) {
2095                                 ht_conf->extension_chan_offset =
2096                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2097                                 ht_conf->is_40mhz = true;
2098                         } else if (conf_is_ht40_plus(conf)) {
2099                                 ht_conf->extension_chan_offset =
2100                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2101                                 ht_conf->is_40mhz = true;
2102                         } else {
2103                                 ht_conf->extension_chan_offset =
2104                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2105                                 ht_conf->is_40mhz = false;
2106                         }
2107                 } else
2108                         ht_conf->is_40mhz = false;
2109                 /* Default to no protection. Protection mode will later be set
2110                  * from BSS config in iwl_ht_conf */
2111                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2112
2113                 /* if we are switching from ht to 2.4 clear flags
2114                  * from any ht related info since 2.4 does not
2115                  * support ht */
2116                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2117                         priv->staging_rxon.flags = 0;
2118
2119                 iwl_set_rxon_channel(priv, conf->channel);
2120                 iwl_set_rxon_ht(priv, ht_conf);
2121
2122                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2123                 spin_unlock_irqrestore(&priv->lock, flags);
2124
2125                 if (priv->cfg->ops->lib->update_bcast_station)
2126                         ret = priv->cfg->ops->lib->update_bcast_station(priv);
2127
2128  set_ch_out:
2129                 /* The list of supported rates and rate mask can be different
2130                  * for each band; since the band may have changed, reset
2131                  * the rate mask to what mac80211 lists */
2132                 iwl_set_rate(priv);
2133         }
2134
2135         if (changed & (IEEE80211_CONF_CHANGE_PS |
2136                         IEEE80211_CONF_CHANGE_IDLE)) {
2137                 ret = iwl_power_update_mode(priv, false);
2138                 if (ret)
2139                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2140         }
2141
2142         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2143                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2144                         priv->tx_power_user_lmt, conf->power_level);
2145
2146                 iwl_set_tx_power(priv, conf->power_level, false);
2147         }
2148
2149         if (!iwl_is_ready(priv)) {
2150                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2151                 goto out;
2152         }
2153
2154         if (scan_active)
2155                 goto out;
2156
2157         if (memcmp(&priv->active_rxon,
2158                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2159                 iwlcore_commit_rxon(priv);
2160         else
2161                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2162
2163
2164 out:
2165         IWL_DEBUG_MAC80211(priv, "leave\n");
2166         mutex_unlock(&priv->mutex);
2167         return ret;
2168 }
2169 EXPORT_SYMBOL(iwl_mac_config);
2170
2171 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2172 {
2173         struct iwl_priv *priv = hw->priv;
2174         unsigned long flags;
2175
2176         mutex_lock(&priv->mutex);
2177         IWL_DEBUG_MAC80211(priv, "enter\n");
2178
2179         spin_lock_irqsave(&priv->lock, flags);
2180         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2181         spin_unlock_irqrestore(&priv->lock, flags);
2182
2183         spin_lock_irqsave(&priv->lock, flags);
2184
2185         /* new association get rid of ibss beacon skb */
2186         if (priv->ibss_beacon)
2187                 dev_kfree_skb(priv->ibss_beacon);
2188
2189         priv->ibss_beacon = NULL;
2190
2191         priv->timestamp = 0;
2192
2193         spin_unlock_irqrestore(&priv->lock, flags);
2194
2195         if (!iwl_is_ready_rf(priv)) {
2196                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2197                 mutex_unlock(&priv->mutex);
2198                 return;
2199         }
2200
2201         /* we are restarting association process
2202          * clear RXON_FILTER_ASSOC_MSK bit
2203          */
2204         iwl_scan_cancel_timeout(priv, 100);
2205         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2206         iwlcore_commit_rxon(priv);
2207
2208         iwl_set_rate(priv);
2209
2210         mutex_unlock(&priv->mutex);
2211
2212         IWL_DEBUG_MAC80211(priv, "leave\n");
2213 }
2214 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2215
2216 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2217 {
2218         if (!priv->txq)
2219                 priv->txq = kzalloc(
2220                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2221                         GFP_KERNEL);
2222         if (!priv->txq) {
2223                 IWL_ERR(priv, "Not enough memory for txq\n");
2224                 return -ENOMEM;
2225         }
2226         return 0;
2227 }
2228 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2229
2230 void iwl_free_txq_mem(struct iwl_priv *priv)
2231 {
2232         kfree(priv->txq);
2233         priv->txq = NULL;
2234 }
2235 EXPORT_SYMBOL(iwl_free_txq_mem);
2236
2237 #ifdef CONFIG_IWLWIFI_DEBUGFS
2238
2239 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2240
2241 void iwl_reset_traffic_log(struct iwl_priv *priv)
2242 {
2243         priv->tx_traffic_idx = 0;
2244         priv->rx_traffic_idx = 0;
2245         if (priv->tx_traffic)
2246                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2247         if (priv->rx_traffic)
2248                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2249 }
2250
2251 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2252 {
2253         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2254
2255         if (iwl_debug_level & IWL_DL_TX) {
2256                 if (!priv->tx_traffic) {
2257                         priv->tx_traffic =
2258                                 kzalloc(traffic_size, GFP_KERNEL);
2259                         if (!priv->tx_traffic)
2260                                 return -ENOMEM;
2261                 }
2262         }
2263         if (iwl_debug_level & IWL_DL_RX) {
2264                 if (!priv->rx_traffic) {
2265                         priv->rx_traffic =
2266                                 kzalloc(traffic_size, GFP_KERNEL);
2267                         if (!priv->rx_traffic)
2268                                 return -ENOMEM;
2269                 }
2270         }
2271         iwl_reset_traffic_log(priv);
2272         return 0;
2273 }
2274 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2275
2276 void iwl_free_traffic_mem(struct iwl_priv *priv)
2277 {
2278         kfree(priv->tx_traffic);
2279         priv->tx_traffic = NULL;
2280
2281         kfree(priv->rx_traffic);
2282         priv->rx_traffic = NULL;
2283 }
2284 EXPORT_SYMBOL(iwl_free_traffic_mem);
2285
2286 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2287                       u16 length, struct ieee80211_hdr *header)
2288 {
2289         __le16 fc;
2290         u16 len;
2291
2292         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2293                 return;
2294
2295         if (!priv->tx_traffic)
2296                 return;
2297
2298         fc = header->frame_control;
2299         if (ieee80211_is_data(fc)) {
2300                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2301                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2302                 memcpy((priv->tx_traffic +
2303                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2304                        header, len);
2305                 priv->tx_traffic_idx =
2306                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2307         }
2308 }
2309 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2310
2311 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2312                       u16 length, struct ieee80211_hdr *header)
2313 {
2314         __le16 fc;
2315         u16 len;
2316
2317         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2318                 return;
2319
2320         if (!priv->rx_traffic)
2321                 return;
2322
2323         fc = header->frame_control;
2324         if (ieee80211_is_data(fc)) {
2325                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2326                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2327                 memcpy((priv->rx_traffic +
2328                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2329                        header, len);
2330                 priv->rx_traffic_idx =
2331                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2332         }
2333 }
2334 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2335
2336 const char *get_mgmt_string(int cmd)
2337 {
2338         switch (cmd) {
2339                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2340                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2341                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2342                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2343                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2344                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2345                 IWL_CMD(MANAGEMENT_BEACON);
2346                 IWL_CMD(MANAGEMENT_ATIM);
2347                 IWL_CMD(MANAGEMENT_DISASSOC);
2348                 IWL_CMD(MANAGEMENT_AUTH);
2349                 IWL_CMD(MANAGEMENT_DEAUTH);
2350                 IWL_CMD(MANAGEMENT_ACTION);
2351         default:
2352                 return "UNKNOWN";
2353
2354         }
2355 }
2356
2357 const char *get_ctrl_string(int cmd)
2358 {
2359         switch (cmd) {
2360                 IWL_CMD(CONTROL_BACK_REQ);
2361                 IWL_CMD(CONTROL_BACK);
2362                 IWL_CMD(CONTROL_PSPOLL);
2363                 IWL_CMD(CONTROL_RTS);
2364                 IWL_CMD(CONTROL_CTS);
2365                 IWL_CMD(CONTROL_ACK);
2366                 IWL_CMD(CONTROL_CFEND);
2367                 IWL_CMD(CONTROL_CFENDACK);
2368         default:
2369                 return "UNKNOWN";
2370
2371         }
2372 }
2373
2374 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2375 {
2376         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2377         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2378         priv->led_tpt = 0;
2379 }
2380
2381 /*
2382  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2383  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2384  * Use debugFs to display the rx/rx_statistics
2385  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2386  * information will be recorded, but DATA pkt still will be recorded
2387  * for the reason of iwl_led.c need to control the led blinking based on
2388  * number of tx and rx data.
2389  *
2390  */
2391 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2392 {
2393         struct traffic_stats    *stats;
2394
2395         if (is_tx)
2396                 stats = &priv->tx_stats;
2397         else
2398                 stats = &priv->rx_stats;
2399
2400         if (ieee80211_is_mgmt(fc)) {
2401                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2402                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2403                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2404                         break;
2405                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2406                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2407                         break;
2408                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2409                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2410                         break;
2411                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2412                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2413                         break;
2414                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2415                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2416                         break;
2417                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2418                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2419                         break;
2420                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2421                         stats->mgmt[MANAGEMENT_BEACON]++;
2422                         break;
2423                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2424                         stats->mgmt[MANAGEMENT_ATIM]++;
2425                         break;
2426                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2427                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2428                         break;
2429                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2430                         stats->mgmt[MANAGEMENT_AUTH]++;
2431                         break;
2432                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2433                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2434                         break;
2435                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2436                         stats->mgmt[MANAGEMENT_ACTION]++;
2437                         break;
2438                 }
2439         } else if (ieee80211_is_ctl(fc)) {
2440                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2441                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2442                         stats->ctrl[CONTROL_BACK_REQ]++;
2443                         break;
2444                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2445                         stats->ctrl[CONTROL_BACK]++;
2446                         break;
2447                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2448                         stats->ctrl[CONTROL_PSPOLL]++;
2449                         break;
2450                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2451                         stats->ctrl[CONTROL_RTS]++;
2452                         break;
2453                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2454                         stats->ctrl[CONTROL_CTS]++;
2455                         break;
2456                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2457                         stats->ctrl[CONTROL_ACK]++;
2458                         break;
2459                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2460                         stats->ctrl[CONTROL_CFEND]++;
2461                         break;
2462                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2463                         stats->ctrl[CONTROL_CFENDACK]++;
2464                         break;
2465                 }
2466         } else {
2467                 /* data */
2468                 stats->data_cnt++;
2469                 stats->data_bytes += len;
2470         }
2471         iwl_leds_background(priv);
2472 }
2473 EXPORT_SYMBOL(iwl_update_stats);
2474 #endif
2475
2476 static const char *get_csr_string(int cmd)
2477 {
2478         switch (cmd) {
2479                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2480                 IWL_CMD(CSR_INT_COALESCING);
2481                 IWL_CMD(CSR_INT);
2482                 IWL_CMD(CSR_INT_MASK);
2483                 IWL_CMD(CSR_FH_INT_STATUS);
2484                 IWL_CMD(CSR_GPIO_IN);
2485                 IWL_CMD(CSR_RESET);
2486                 IWL_CMD(CSR_GP_CNTRL);
2487                 IWL_CMD(CSR_HW_REV);
2488                 IWL_CMD(CSR_EEPROM_REG);
2489                 IWL_CMD(CSR_EEPROM_GP);
2490                 IWL_CMD(CSR_OTP_GP_REG);
2491                 IWL_CMD(CSR_GIO_REG);
2492                 IWL_CMD(CSR_GP_UCODE_REG);
2493                 IWL_CMD(CSR_GP_DRIVER_REG);
2494                 IWL_CMD(CSR_UCODE_DRV_GP1);
2495                 IWL_CMD(CSR_UCODE_DRV_GP2);
2496                 IWL_CMD(CSR_LED_REG);
2497                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2498                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2499                 IWL_CMD(CSR_ANA_PLL_CFG);
2500                 IWL_CMD(CSR_HW_REV_WA_REG);
2501                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2502         default:
2503                 return "UNKNOWN";
2504
2505         }
2506 }
2507
2508 void iwl_dump_csr(struct iwl_priv *priv)
2509 {
2510         int i;
2511         u32 csr_tbl[] = {
2512                 CSR_HW_IF_CONFIG_REG,
2513                 CSR_INT_COALESCING,
2514                 CSR_INT,
2515                 CSR_INT_MASK,
2516                 CSR_FH_INT_STATUS,
2517                 CSR_GPIO_IN,
2518                 CSR_RESET,
2519                 CSR_GP_CNTRL,
2520                 CSR_HW_REV,
2521                 CSR_EEPROM_REG,
2522                 CSR_EEPROM_GP,
2523                 CSR_OTP_GP_REG,
2524                 CSR_GIO_REG,
2525                 CSR_GP_UCODE_REG,
2526                 CSR_GP_DRIVER_REG,
2527                 CSR_UCODE_DRV_GP1,
2528                 CSR_UCODE_DRV_GP2,
2529                 CSR_LED_REG,
2530                 CSR_DRAM_INT_TBL_REG,
2531                 CSR_GIO_CHICKEN_BITS,
2532                 CSR_ANA_PLL_CFG,
2533                 CSR_HW_REV_WA_REG,
2534                 CSR_DBG_HPET_MEM_REG
2535         };
2536         IWL_ERR(priv, "CSR values:\n");
2537         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2538                 "CSR_INT_PERIODIC_REG)\n");
2539         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2540                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2541                         get_csr_string(csr_tbl[i]),
2542                         iwl_read32(priv, csr_tbl[i]));
2543         }
2544 }
2545 EXPORT_SYMBOL(iwl_dump_csr);
2546
2547 static const char *get_fh_string(int cmd)
2548 {
2549         switch (cmd) {
2550                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2551                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2552                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2553                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2554                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2555                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2556                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2557                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2558                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2559         default:
2560                 return "UNKNOWN";
2561
2562         }
2563 }
2564
2565 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2566 {
2567         int i;
2568 #ifdef CONFIG_IWLWIFI_DEBUG
2569         int pos = 0;
2570         size_t bufsz = 0;
2571 #endif
2572         u32 fh_tbl[] = {
2573                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2574                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2575                 FH_RSCSR_CHNL0_WPTR,
2576                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2577                 FH_MEM_RSSR_SHARED_CTRL_REG,
2578                 FH_MEM_RSSR_RX_STATUS_REG,
2579                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2580                 FH_TSSR_TX_STATUS_REG,
2581                 FH_TSSR_TX_ERROR_REG
2582         };
2583 #ifdef CONFIG_IWLWIFI_DEBUG
2584         if (display) {
2585                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2586                 *buf = kmalloc(bufsz, GFP_KERNEL);
2587                 if (!*buf)
2588                         return -ENOMEM;
2589                 pos += scnprintf(*buf + pos, bufsz - pos,
2590                                 "FH register values:\n");
2591                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2592                         pos += scnprintf(*buf + pos, bufsz - pos,
2593                                 "  %34s: 0X%08x\n",
2594                                 get_fh_string(fh_tbl[i]),
2595                                 iwl_read_direct32(priv, fh_tbl[i]));
2596                 }
2597                 return pos;
2598         }
2599 #endif
2600         IWL_ERR(priv, "FH register values:\n");
2601         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2602                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2603                         get_fh_string(fh_tbl[i]),
2604                         iwl_read_direct32(priv, fh_tbl[i]));
2605         }
2606         return 0;
2607 }
2608 EXPORT_SYMBOL(iwl_dump_fh);
2609
2610 static void iwl_force_rf_reset(struct iwl_priv *priv)
2611 {
2612         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2613                 return;
2614
2615         if (!iwl_is_associated(priv)) {
2616                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2617                 return;
2618         }
2619         /*
2620          * There is no easy and better way to force reset the radio,
2621          * the only known method is switching channel which will force to
2622          * reset and tune the radio.
2623          * Use internal short scan (single channel) operation to should
2624          * achieve this objective.
2625          * Driver should reset the radio when number of consecutive missed
2626          * beacon, or any other uCode error condition detected.
2627          */
2628         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2629         iwl_internal_short_hw_scan(priv);
2630 }
2631
2632
2633 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
2634 {
2635         struct iwl_force_reset *force_reset;
2636
2637         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2638                 return -EINVAL;
2639
2640         if (mode >= IWL_MAX_FORCE_RESET) {
2641                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2642                 return -EINVAL;
2643         }
2644         force_reset = &priv->force_reset[mode];
2645         force_reset->reset_request_count++;
2646         if (!external) {
2647                 if (force_reset->last_force_reset_jiffies &&
2648                     time_after(force_reset->last_force_reset_jiffies +
2649                     force_reset->reset_duration, jiffies)) {
2650                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
2651                         force_reset->reset_reject_count++;
2652                         return -EAGAIN;
2653                 }
2654         }
2655         force_reset->reset_success_count++;
2656         force_reset->last_force_reset_jiffies = jiffies;
2657         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2658         switch (mode) {
2659         case IWL_RF_RESET:
2660                 iwl_force_rf_reset(priv);
2661                 break;
2662         case IWL_FW_RESET:
2663                 /*
2664                  * if the request is from external(ex: debugfs),
2665                  * then always perform the request in regardless the module
2666                  * parameter setting
2667                  * if the request is from internal (uCode error or driver
2668                  * detect failure), then fw_restart module parameter
2669                  * need to be check before performing firmware reload
2670                  */
2671                 if (!external && !priv->cfg->mod_params->restart_fw) {
2672                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
2673                                        "module parameter setting\n");
2674                         break;
2675                 }
2676                 IWL_ERR(priv, "On demand firmware reload\n");
2677                 /* Set the FW error flag -- cleared on iwl_down */
2678                 set_bit(STATUS_FW_ERROR, &priv->status);
2679                 wake_up_interruptible(&priv->wait_command_queue);
2680                 /*
2681                  * Keep the restart process from trying to send host
2682                  * commands by clearing the INIT status bit
2683                  */
2684                 clear_bit(STATUS_READY, &priv->status);
2685                 queue_work(priv->workqueue, &priv->restart);
2686                 break;
2687         }
2688         return 0;
2689 }
2690 EXPORT_SYMBOL(iwl_force_reset);
2691
2692 /**
2693  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2694  *
2695  * During normal condition (no queue is stuck), the timer is continually set to
2696  * execute every monitor_recover_period milliseconds after the last timer
2697  * expired.  When the queue read_ptr is at the same place, the timer is
2698  * shorten to 100mSecs.  This is
2699  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2700  *      2) to detect the stuck queues quicker before the station and AP can
2701  *      disassociate each other.
2702  *
2703  * This function monitors all the tx queues and recover from it if any
2704  * of the queues are stuck.
2705  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2706  *      it will recover by resetting the firmware and return.
2707  * 2. Then, it checks for station association.  If it associates it will check
2708  *      other queues.  If any queue is stuck, it will recover by resetting
2709  *      the firmware.
2710  * Note: It the number of times the queue read_ptr to be at the same place to
2711  *      be MAX_REPEAT+1 in order to consider to be stuck.
2712  */
2713 /*
2714  * The maximum number of times the read pointer of the tx queue at the
2715  * same place without considering to be stuck.
2716  */
2717 #define MAX_REPEAT      (2)
2718 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2719 {
2720         struct iwl_tx_queue *txq;
2721         struct iwl_queue *q;
2722
2723         txq = &priv->txq[cnt];
2724         q = &txq->q;
2725         /* queue is empty, skip */
2726         if (q->read_ptr != q->write_ptr) {
2727                 if (q->read_ptr == q->last_read_ptr) {
2728                         /* a queue has not been read from last time */
2729                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2730                                 IWL_ERR(priv,
2731                                         "queue %d stuck %d time. Fw reload.\n",
2732                                         q->id, q->repeat_same_read_ptr);
2733                                 q->repeat_same_read_ptr = 0;
2734                                 iwl_force_reset(priv, IWL_FW_RESET, false);
2735                         } else {
2736                                 q->repeat_same_read_ptr++;
2737                                 IWL_DEBUG_RADIO(priv,
2738                                                 "queue %d, not read %d time\n",
2739                                                 q->id,
2740                                                 q->repeat_same_read_ptr);
2741                                 mod_timer(&priv->monitor_recover, jiffies +
2742                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2743                         }
2744                         return 1;
2745                 } else {
2746                         q->last_read_ptr = q->read_ptr;
2747                         q->repeat_same_read_ptr = 0;
2748                 }
2749         }
2750         return 0;
2751 }
2752
2753 void iwl_bg_monitor_recover(unsigned long data)
2754 {
2755         struct iwl_priv *priv = (struct iwl_priv *)data;
2756         int cnt;
2757
2758         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2759                 return;
2760
2761         /* monitor and check for stuck cmd queue */
2762         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2763                 return;
2764
2765         /* monitor and check for other stuck queues */
2766         if (iwl_is_associated(priv)) {
2767                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2768                         /* skip as we already checked the command queue */
2769                         if (cnt == IWL_CMD_QUEUE_NUM)
2770                                 continue;
2771                         if (iwl_check_stuck_queue(priv, cnt))
2772                                 return;
2773                 }
2774         }
2775         /*
2776          * Reschedule the timer to occur in
2777          * priv->cfg->monitor_recover_period
2778          */
2779         mod_timer(&priv->monitor_recover,
2780                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2781 }
2782 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2783
2784
2785 /*
2786  * extended beacon time format
2787  * time in usec will be changed into a 32-bit value in extended:internal format
2788  * the extended part is the beacon counts
2789  * the internal part is the time in usec within one beacon interval
2790  */
2791 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2792 {
2793         u32 quot;
2794         u32 rem;
2795         u32 interval = beacon_interval * TIME_UNIT;
2796
2797         if (!interval || !usec)
2798                 return 0;
2799
2800         quot = (usec / interval) &
2801                 (iwl_beacon_time_mask_high(priv,
2802                 priv->hw_params.beacon_time_tsf_bits) >>
2803                 priv->hw_params.beacon_time_tsf_bits);
2804         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2805                                    priv->hw_params.beacon_time_tsf_bits);
2806
2807         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2808 }
2809 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2810
2811 /* base is usually what we get from ucode with each received frame,
2812  * the same as HW timer counter counting down
2813  */
2814 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2815                            u32 addon, u32 beacon_interval)
2816 {
2817         u32 base_low = base & iwl_beacon_time_mask_low(priv,
2818                                         priv->hw_params.beacon_time_tsf_bits);
2819         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2820                                         priv->hw_params.beacon_time_tsf_bits);
2821         u32 interval = beacon_interval * TIME_UNIT;
2822         u32 res = (base & iwl_beacon_time_mask_high(priv,
2823                                 priv->hw_params.beacon_time_tsf_bits)) +
2824                                 (addon & iwl_beacon_time_mask_high(priv,
2825                                 priv->hw_params.beacon_time_tsf_bits));
2826
2827         if (base_low > addon_low)
2828                 res += base_low - addon_low;
2829         else if (base_low < addon_low) {
2830                 res += interval + base_low - addon_low;
2831                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2832         } else
2833                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2834
2835         return cpu_to_le32(res);
2836 }
2837 EXPORT_SYMBOL(iwl_add_beacon_time);
2838
2839 #ifdef CONFIG_PM
2840
2841 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2842 {
2843         struct iwl_priv *priv = pci_get_drvdata(pdev);
2844
2845         /*
2846          * This function is called when system goes into suspend state
2847          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2848          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2849          * it will not call apm_ops.stop() to stop the DMA operation.
2850          * Calling apm_ops.stop here to make sure we stop the DMA.
2851          */
2852         priv->cfg->ops->lib->apm_ops.stop(priv);
2853
2854         pci_save_state(pdev);
2855         pci_disable_device(pdev);
2856         pci_set_power_state(pdev, PCI_D3hot);
2857
2858         return 0;
2859 }
2860 EXPORT_SYMBOL(iwl_pci_suspend);
2861
2862 int iwl_pci_resume(struct pci_dev *pdev)
2863 {
2864         struct iwl_priv *priv = pci_get_drvdata(pdev);
2865         int ret;
2866         bool hw_rfkill = false;
2867
2868         /*
2869          * We disable the RETRY_TIMEOUT register (0x41) to keep
2870          * PCI Tx retries from interfering with C3 CPU state.
2871          */
2872         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2873
2874         pci_set_power_state(pdev, PCI_D0);
2875         ret = pci_enable_device(pdev);
2876         if (ret)
2877                 return ret;
2878         pci_restore_state(pdev);
2879         iwl_enable_interrupts(priv);
2880
2881         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2882                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2883                 hw_rfkill = true;
2884
2885         if (hw_rfkill)
2886                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2887         else
2888                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2889
2890         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2891
2892         return 0;
2893 }
2894 EXPORT_SYMBOL(iwl_pci_resume);
2895
2896 #endif /* CONFIG_PM */