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