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)
 145 {
 146         int i;
 147         u8 ind = ant;
 148         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 149                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 150                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 151                         return ind;
 152         }
 153         return ant;
 154 }
 155 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 156
 157 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 158 EXPORT_SYMBOL(iwl_bcast_addr);
 159
 160
 161 /* This function both allocates and initializes hw and priv. */
 162 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 163                 struct ieee80211_ops *hw_ops)
 164 {
 165         struct iwl_priv *priv;
 166
 167         /* mac80211 allocates memory for this device instance, including
 168          *   space for this driver's private structure */
 169         struct ieee80211_hw *hw =
 170                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 171         if (hw == NULL) {
 172                 printk(KERN_ERR "%s: Can not allocate network device\n",
 173                        cfg->name);
 174                 goto out;
 175         }
 176
 177         priv = hw->priv;
 178         priv->hw = hw;
 179
 180 out:
 181         return hw;
 182 }
 183 EXPORT_SYMBOL(iwl_alloc_all);
 184
 185 void iwl_hw_detect(struct iwl_priv *priv)
 186 {
 187         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 188         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 189         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 190 }
 191 EXPORT_SYMBOL(iwl_hw_detect);
 192
 193 /*
 194  * QoS  support
 195 */
 196 static void iwl_update_qos(struct iwl_priv *priv)
 197 {
 198         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 199                 return;
 200
 201         priv->qos_data.def_qos_parm.qos_flags = 0;
 202
 203         if (priv->qos_data.qos_active)
 204                 priv->qos_data.def_qos_parm.qos_flags |=
 205                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 206
 207         if (priv->current_ht_config.is_ht)
 208                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 209
 210         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 211                       priv->qos_data.qos_active,
 212                       priv->qos_data.def_qos_parm.qos_flags);
 213
 214         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 215                                sizeof(struct iwl_qosparam_cmd),
 216                                &priv->qos_data.def_qos_parm, NULL);
 217 }
 218
 219 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 220 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 221 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 222                               struct ieee80211_sta_ht_cap *ht_info,
 223                               enum ieee80211_band band)
 224 {
 225         u16 max_bit_rate = 0;
 226         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 227         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 228
 229         ht_info->cap = 0;
 230         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 231
 232         ht_info->ht_supported = true;
 233
 234         if (priv->cfg->ht_greenfield_support)
 235                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 236         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 237         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 238         if (priv->hw_params.ht40_channel & BIT(band)) {
 239                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 240                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 241                 ht_info->mcs.rx_mask[4] = 0x01;
 242                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 243         }
 244
 245         if (priv->cfg->mod_params->amsdu_size_8K)
 246                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 247
 248         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 249         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 250
 251         ht_info->mcs.rx_mask[0] = 0xFF;
 252         if (rx_chains_num >= 2)
 253                 ht_info->mcs.rx_mask[1] = 0xFF;
 254         if (rx_chains_num >= 3)
 255                 ht_info->mcs.rx_mask[2] = 0xFF;
 256
 257         /* Highest supported Rx data rate */
 258         max_bit_rate *= rx_chains_num;
 259         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 260         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 261
 262         /* Tx MCS capabilities */
 263         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 264         if (tx_chains_num != rx_chains_num) {
 265                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 266                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 267                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 268         }
 269 }
 270
 271 /**
 272  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 273  */
 274 int iwlcore_init_geos(struct iwl_priv *priv)
 275 {
 276         struct iwl_channel_info *ch;
 277         struct ieee80211_supported_band *sband;
 278         struct ieee80211_channel *channels;
 279         struct ieee80211_channel *geo_ch;
 280         struct ieee80211_rate *rates;
 281         int i = 0;
 282
 283         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 284             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 285                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 286                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 287                 return 0;
 288         }
 289
 290         channels = kzalloc(sizeof(struct ieee80211_channel) *
 291                            priv->channel_count, GFP_KERNEL);
 292         if (!channels)
 293                 return -ENOMEM;
 294
 295         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 296                         GFP_KERNEL);
 297         if (!rates) {
 298                 kfree(channels);
 299                 return -ENOMEM;
 300         }
 301
 302         /* 5.2GHz channels start after the 2.4GHz channels */
 303         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 304         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 305         /* just OFDM */
 306         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 307         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 308
 309         if (priv->cfg->sku & IWL_SKU_N)
 310                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 311                                          IEEE80211_BAND_5GHZ);
 312
 313         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 314         sband->channels = channels;
 315         /* OFDM & CCK */
 316         sband->bitrates = rates;
 317         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 318
 319         if (priv->cfg->sku & IWL_SKU_N)
 320                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 321                                          IEEE80211_BAND_2GHZ);
 322
 323         priv->ieee_channels = channels;
 324         priv->ieee_rates = rates;
 325
 326         for (i = 0;  i < priv->channel_count; i++) {
 327                 ch = &priv->channel_info[i];
 328
 329                 /* FIXME: might be removed if scan is OK */
 330                 if (!is_channel_valid(ch))
 331                         continue;
 332
 333                 if (is_channel_a_band(ch))
 334                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 335                 else
 336                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 337
 338                 geo_ch = &sband->channels[sband->n_channels++];
 339
 340                 geo_ch->center_freq =
 341                                 ieee80211_channel_to_frequency(ch->channel);
 342                 geo_ch->max_power = ch->max_power_avg;
 343                 geo_ch->max_antenna_gain = 0xff;
 344                 geo_ch->hw_value = ch->channel;
 345
 346                 if (is_channel_valid(ch)) {
 347                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 348                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 349
 350                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 351                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 352
 353                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 354                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 355
 356                         geo_ch->flags |= ch->ht40_extension_channel;
 357
 358                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 359                                 priv->tx_power_device_lmt = ch->max_power_avg;
 360                 } else {
 361                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 362                 }
 363
 364                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 365                                 ch->channel, geo_ch->center_freq,
 366                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 367                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 368                                 "restricted" : "valid",
 369                                  geo_ch->flags);
 370         }
 371
 372         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 373              priv->cfg->sku & IWL_SKU_A) {
 374                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 375                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 376                            priv->pci_dev->device,
 377                            priv->pci_dev->subsystem_device);
 378                 priv->cfg->sku &= ~IWL_SKU_A;
 379         }
 380
 381         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 382                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 383                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 384
 385         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 386
 387         return 0;
 388 }
 389 EXPORT_SYMBOL(iwlcore_init_geos);
 390
 391 /*
 392  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 393  */
 394 void iwlcore_free_geos(struct iwl_priv *priv)
 395 {
 396         kfree(priv->ieee_channels);
 397         kfree(priv->ieee_rates);
 398         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 399 }
 400 EXPORT_SYMBOL(iwlcore_free_geos);
 401
 402 /*
 403  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 404  *  function.
 405  */
 406 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 407                                 __le32 *tx_flags)
 408 {
 409         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 410                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 411                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 412         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 413                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 414                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 415         }
 416 }
 417 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 418
 419 static bool is_single_rx_stream(struct iwl_priv *priv)
 420 {
 421         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 422                priv->current_ht_config.single_chain_sufficient;
 423 }
 424
 425 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 426                                    enum ieee80211_band band,
 427                                    u16 channel, u8 extension_chan_offset)
 428 {
 429         const struct iwl_channel_info *ch_info;
 430
 431         ch_info = iwl_get_channel_info(priv, band, channel);
 432         if (!is_channel_valid(ch_info))
 433                 return 0;
 434
 435         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 436                 return !(ch_info->ht40_extension_channel &
 437                                         IEEE80211_CHAN_NO_HT40PLUS);
 438         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 439                 return !(ch_info->ht40_extension_channel &
 440                                         IEEE80211_CHAN_NO_HT40MINUS);
 441
 442         return 0;
 443 }
 444
 445 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 446                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 447 {
 448         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 449
 450         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 451                 return 0;
 452
 453         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 454          * the bit will not set if it is pure 40MHz case
 455          */
 456         if (sta_ht_inf) {
 457                 if (!sta_ht_inf->ht_supported)
 458                         return 0;
 459         }
 460 #ifdef CONFIG_IWLWIFI_DEBUG
 461         if (priv->disable_ht40)
 462                 return 0;
 463 #endif
 464         return iwl_is_channel_extension(priv, priv->band,
 465                         le16_to_cpu(priv->staging_rxon.channel),
 466                         ht_conf->extension_chan_offset);
 467 }
 468 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 469
 470 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 471 {
 472         u16 new_val = 0;
 473         u16 beacon_factor = 0;
 474
 475         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 476         new_val = beacon_val / beacon_factor;
 477
 478         if (!new_val)
 479                 new_val = max_beacon_val;
 480
 481         return new_val;
 482 }
 483
 484 void iwl_setup_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif)
 485 {
 486         u64 tsf;
 487         s32 interval_tm, rem;
 488         unsigned long flags;
 489         struct ieee80211_conf *conf = NULL;
 490         u16 beacon_int;
 491
 492         conf = ieee80211_get_hw_conf(priv->hw);
 493
 494         spin_lock_irqsave(&priv->lock, flags);
 495         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 496         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 497
 498         beacon_int = vif->bss_conf.beacon_int;
 499
 500         if (vif->type == NL80211_IFTYPE_ADHOC) {
 501                 /* TODO: we need to get atim_window from upper stack
 502                  * for now we set to 0 */
 503                 priv->rxon_timing.atim_window = 0;
 504         } else {
 505                 priv->rxon_timing.atim_window = 0;
 506         }
 507
 508         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 509                                 priv->hw_params.max_beacon_itrvl * 1024);
 510         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 511
 512         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 513         interval_tm = beacon_int * 1024;
 514         rem = do_div(tsf, interval_tm);
 515         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518         IWL_DEBUG_ASSOC(priv,
 519                         "beacon interval %d beacon timer %d beacon tim %d\n",
 520                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 521                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 522                         le16_to_cpu(priv->rxon_timing.atim_window));
 523 }
 524 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 525
 526 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 527 {
 528         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 529
 530         if (hw_decrypt)
 531                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 532         else
 533                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 534
 535 }
 536 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 537
 538 /**
 539  * iwl_check_rxon_cmd - validate RXON structure is valid
 540  *
 541  * NOTE:  This is really only useful during development and can eventually
 542  * be #ifdef'd out once the driver is stable and folks aren't actively
 543  * making changes
 544  */
 545 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 546 {
 547         int error = 0;
 548         int counter = 1;
 549         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 550
 551         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 552                 error |= le32_to_cpu(rxon->flags &
 553                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 554                                  RXON_FLG_RADAR_DETECT_MSK));
 555                 if (error)
 556                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 557                                     counter++, error);
 558         } else {
 559                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 560                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 561                 if (error)
 562                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 563                                     counter++, error);
 564                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 565                 if (error)
 566                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 567                                     counter++, error);
 568         }
 569         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 570         if (error)
 571                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 572
 573         /* make sure basic rates 6Mbps and 1Mbps are supported */
 574         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 575                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 576         if (error)
 577                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 578
 579         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 580         if (error)
 581                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 582
 583         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 584                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 585         if (error)
 586                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 587                             counter++, error);
 588
 589         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 590                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 591         if (error)
 592                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 593                             counter++, error);
 594
 595         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 596                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 597         if (error)
 598                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 599                             counter++, error);
 600
 601         if (error)
 602                 IWL_WARN(priv, "Tuning to channel %d\n",
 603                             le16_to_cpu(rxon->channel));
 604
 605         if (error) {
 606                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 607                 return -1;
 608         }
 609         return 0;
 610 }
 611 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 612
 613 /**
 614  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 615  * @priv: staging_rxon is compared to active_rxon
 616  *
 617  * If the RXON structure is changing enough to require a new tune,
 618  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 619  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 620  */
 621 int iwl_full_rxon_required(struct iwl_priv *priv)
 622 {
 623
 624         /* These items are only settable from the full RXON command */
 625         if (!(iwl_is_associated(priv)) ||
 626             compare_ether_addr(priv->staging_rxon.bssid_addr,
 627                                priv->active_rxon.bssid_addr) ||
 628             compare_ether_addr(priv->staging_rxon.node_addr,
 629                                priv->active_rxon.node_addr) ||
 630             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 631                                priv->active_rxon.wlap_bssid_addr) ||
 632             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 633             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 634             (priv->staging_rxon.air_propagation !=
 635              priv->active_rxon.air_propagation) ||
 636             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 637              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 638             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 639              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 640             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 641              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 642             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 643                 return 1;
 644
 645         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 646          * be updated with the RXON_ASSOC command -- however only some
 647          * flag transitions are allowed using RXON_ASSOC */
 648
 649         /* Check if we are not switching bands */
 650         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 651             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 652                 return 1;
 653
 654         /* Check if we are switching association toggle */
 655         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 656                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 657                 return 1;
 658
 659         return 0;
 660 }
 661 EXPORT_SYMBOL(iwl_full_rxon_required);
 662
 663 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 664 {
 665         /*
 666          * Assign the lowest rate -- should really get this from
 667          * the beacon skb from mac80211.
 668          */
 669         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 670                 return IWL_RATE_1M_PLCP;
 671         else
 672                 return IWL_RATE_6M_PLCP;
 673 }
 674 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 675
 676 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 677 {
 678         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 679
 680         if (!ht_conf->is_ht) {
 681                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 682                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 683                         RXON_FLG_HT40_PROT_MSK |
 684                         RXON_FLG_HT_PROT_MSK);
 685                 return;
 686         }
 687
 688         /* FIXME: if the definition of ht_protection changed, the "translation"
 689          * will be needed for rxon->flags
 690          */
 691         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 692
 693         /* Set up channel bandwidth:
 694          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 695         /* clear the HT channel mode before set the mode */
 696         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 697                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 698         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 699                 /* pure ht40 */
 700                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 701                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 702                         /* Note: control channel is opposite of extension channel */
 703                         switch (ht_conf->extension_chan_offset) {
 704                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 705                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 706                                 break;
 707                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 708                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 709                                 break;
 710                         }
 711                 } else {
 712                         /* Note: control channel is opposite of extension channel */
 713                         switch (ht_conf->extension_chan_offset) {
 714                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 715                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 716                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 717                                 break;
 718                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 719                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 720                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 721                                 break;
 722                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 723                         default:
 724                                 /* channel location only valid if in Mixed mode */
 725                                 IWL_ERR(priv, "invalid extension channel offset\n");
 726                                 break;
 727                         }
 728                 }
 729         } else {
 730                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 731         }
 732
 733         if (priv->cfg->ops->hcmd->set_rxon_chain)
 734                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 735
 736         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 737                         "extension channel offset 0x%x\n",
 738                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 739                         ht_conf->extension_chan_offset);
 740 }
 741 EXPORT_SYMBOL(iwl_set_rxon_ht);
 742
 743 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 744 #define IWL_NUM_RX_CHAINS_SINGLE        2
 745 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 746 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 747
 748 /*
 749  * Determine how many receiver/antenna chains to use.
 750  *
 751  * More provides better reception via diversity.  Fewer saves power
 752  * at the expense of throughput, but only when not in powersave to
 753  * start with.
 754  *
 755  * MIMO (dual stream) requires at least 2, but works better with 3.
 756  * This does not determine *which* chains to use, just how many.
 757  */
 758 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 759 {
 760         /* # of Rx chains to use when expecting MIMO. */
 761         if (is_single_rx_stream(priv))
 762                 return IWL_NUM_RX_CHAINS_SINGLE;
 763         else
 764                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 765 }
 766
 767 /*
 768  * When we are in power saving mode, unless device support spatial
 769  * multiplexing power save, use the active count for rx chain count.
 770  */
 771 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 772 {
 773         /* # Rx chains when idling, depending on SMPS mode */
 774         switch (priv->current_ht_config.smps) {
 775         case IEEE80211_SMPS_STATIC:
 776         case IEEE80211_SMPS_DYNAMIC:
 777                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 778         case IEEE80211_SMPS_OFF:
 779                 return active_cnt;
 780         default:
 781                 WARN(1, "invalid SMPS mode %d",
 782                      priv->current_ht_config.smps);
 783                 return active_cnt;
 784         }
 785 }
 786
 787 /* up to 4 chains */
 788 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 789 {
 790         u8 res;
 791         res = (chain_bitmap & BIT(0)) >> 0;
 792         res += (chain_bitmap & BIT(1)) >> 1;
 793         res += (chain_bitmap & BIT(2)) >> 2;
 794         res += (chain_bitmap & BIT(3)) >> 3;
 795         return res;
 796 }
 797
 798 /**
 799  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 800  *
 801  * Selects how many and which Rx receivers/antennas/chains to use.
 802  * This should not be used for scan command ... it puts data in wrong place.
 803  */
 804 void iwl_set_rxon_chain(struct iwl_priv *priv)
 805 {
 806         bool is_single = is_single_rx_stream(priv);
 807         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 808         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 809         u32 active_chains;
 810         u16 rx_chain;
 811
 812         /* Tell uCode which antennas are actually connected.
 813          * Before first association, we assume all antennas are connected.
 814          * Just after first association, iwl_chain_noise_calibration()
 815          *    checks which antennas actually *are* connected. */
 816          if (priv->chain_noise_data.active_chains)
 817                 active_chains = priv->chain_noise_data.active_chains;
 818         else
 819                 active_chains = priv->hw_params.valid_rx_ant;
 820
 821         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 822
 823         /* How many receivers should we use? */
 824         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 825         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 826
 827
 828         /* correct rx chain count according hw settings
 829          * and chain noise calibration
 830          */
 831         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 832         if (valid_rx_cnt < active_rx_cnt)
 833                 active_rx_cnt = valid_rx_cnt;
 834
 835         if (valid_rx_cnt < idle_rx_cnt)
 836                 idle_rx_cnt = valid_rx_cnt;
 837
 838         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 839         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 840
 841         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 842
 843         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 844                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 845         else
 846                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 847
 848         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 849                         priv->staging_rxon.rx_chain,
 850                         active_rx_cnt, idle_rx_cnt);
 851
 852         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 853                 active_rx_cnt < idle_rx_cnt);
 854 }
 855 EXPORT_SYMBOL(iwl_set_rxon_chain);
 856
 857 /* Return valid channel */
 858 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 859                                   enum ieee80211_band band)
 860 {
 861         const struct iwl_channel_info *ch_info;
 862         int i;
 863         u8 channel = 0;
 864
 865         /* only scan single channel, good enough to reset the RF */
 866         /* pick the first valid not in-use channel */
 867         if (band == IEEE80211_BAND_5GHZ) {
 868                 for (i = 14; i < priv->channel_count; i++) {
 869                         if (priv->channel_info[i].channel !=
 870                             le16_to_cpu(priv->staging_rxon.channel)) {
 871                                 channel = priv->channel_info[i].channel;
 872                                 ch_info = iwl_get_channel_info(priv,
 873                                         band, channel);
 874                                 if (is_channel_valid(ch_info))
 875                                         break;
 876                         }
 877                 }
 878         } else {
 879                 for (i = 0; i < 14; i++) {
 880                         if (priv->channel_info[i].channel !=
 881                             le16_to_cpu(priv->staging_rxon.channel)) {
 882                                         channel =
 883                                                 priv->channel_info[i].channel;
 884                                         ch_info = iwl_get_channel_info(priv,
 885                                                 band, channel);
 886                                         if (is_channel_valid(ch_info))
 887                                                 break;
 888                         }
 889                 }
 890         }
 891
 892         return channel;
 893 }
 894 EXPORT_SYMBOL(iwl_get_single_channel_number);
 895
 896 /**
 897  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 898  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 899  * @channel: Any channel valid for the requested phymode
 900
 901  * In addition to setting the staging RXON, priv->phymode is also set.
 902  *
 903  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 904  * in the staging RXON flag structure based on the phymode
 905  */
 906 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 907 {
 908         enum ieee80211_band band = ch->band;
 909         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 910
 911         if (!iwl_get_channel_info(priv, band, channel)) {
 912                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 913                                channel, band);
 914                 return -EINVAL;
 915         }
 916
 917         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 918             (priv->band == band))
 919                 return 0;
 920
 921         priv->staging_rxon.channel = cpu_to_le16(channel);
 922         if (band == IEEE80211_BAND_5GHZ)
 923                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 924         else
 925                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 926
 927         priv->band = band;
 928
 929         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 930
 931         return 0;
 932 }
 933 EXPORT_SYMBOL(iwl_set_rxon_channel);
 934
 935 static void iwl_set_flags_for_band(struct iwl_priv *priv,
 936                                    enum ieee80211_band band,
 937                                    struct ieee80211_vif *vif)
 938 {
 939         if (band == IEEE80211_BAND_5GHZ) {
 940                 priv->staging_rxon.flags &=
 941                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 942                       | RXON_FLG_CCK_MSK);
 943                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 944         } else {
 945                 /* Copied from iwl_post_associate() */
 946                 if (vif && vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 947                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 948                 else
 949                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 950
 951                 if (vif && vif->type == NL80211_IFTYPE_ADHOC)
 952                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 953
 954                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 955                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 956                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 957         }
 958 }
 959
 960 /*
 961  * initialize rxon structure with default values from eeprom
 962  */
 963 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 964                                    struct ieee80211_vif *vif)
 965 {
 966         const struct iwl_channel_info *ch_info;
 967         enum nl80211_iftype type = NL80211_IFTYPE_STATION;
 968
 969         if (vif)
 970                 type = vif->type;
 971
 972         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 973
 974         switch (type) {
 975         case NL80211_IFTYPE_AP:
 976                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 977                 break;
 978
 979         case NL80211_IFTYPE_STATION:
 980                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 981                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 982                 break;
 983
 984         case NL80211_IFTYPE_ADHOC:
 985                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 986                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 987                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 988                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 989                 break;
 990
 991         default:
 992                 IWL_ERR(priv, "Unsupported interface type %d\n", type);
 993                 break;
 994         }
 995
 996 #if 0
 997         /* TODO:  Figure out when short_preamble would be set and cache from
 998          * that */
 999         if (!hw_to_local(priv->hw)->short_preamble)
1000                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1001         else
1002                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1003 #endif
1004
1005         ch_info = iwl_get_channel_info(priv, priv->band,
1006                                        le16_to_cpu(priv->active_rxon.channel));
1007
1008         if (!ch_info)
1009                 ch_info = &priv->channel_info[0];
1010
1011         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1012         priv->band = ch_info->band;
1013
1014         iwl_set_flags_for_band(priv, priv->band, vif);
1015
1016         priv->staging_rxon.ofdm_basic_rates =
1017             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1018         priv->staging_rxon.cck_basic_rates =
1019             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1020
1021         /* clear both MIX and PURE40 mode flag */
1022         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1023                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1024         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1025         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1026         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1027         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1028         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1029 }
1030 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1031
1032 static void iwl_set_rate(struct iwl_priv *priv)
1033 {
1034         const struct ieee80211_supported_band *hw = NULL;
1035         struct ieee80211_rate *rate;
1036         int i;
1037
1038         hw = iwl_get_hw_mode(priv, priv->band);
1039         if (!hw) {
1040                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1041                 return;
1042         }
1043
1044         priv->active_rate = 0;
1045
1046         for (i = 0; i < hw->n_bitrates; i++) {
1047                 rate = &(hw->bitrates[i]);
1048                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1049                         priv->active_rate |= (1 << rate->hw_value);
1050         }
1051
1052         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1053
1054         priv->staging_rxon.cck_basic_rates =
1055             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1056
1057         priv->staging_rxon.ofdm_basic_rates =
1058            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1059 }
1060
1061 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1062 {
1063         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1064         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1065         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1066
1067         if (priv->switch_rxon.switch_in_progress) {
1068                 if (!le32_to_cpu(csa->status) &&
1069                     (csa->channel == priv->switch_rxon.channel)) {
1070                         rxon->channel = csa->channel;
1071                         priv->staging_rxon.channel = csa->channel;
1072                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1073                               le16_to_cpu(csa->channel));
1074                 } else
1075                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1076                               le16_to_cpu(csa->channel));
1077
1078                 priv->switch_rxon.switch_in_progress = false;
1079         }
1080 }
1081 EXPORT_SYMBOL(iwl_rx_csa);
1082
1083 #ifdef CONFIG_IWLWIFI_DEBUG
1084 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1085 {
1086         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1087
1088         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1089         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1090         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1091         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1092         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1093                         le32_to_cpu(rxon->filter_flags));
1094         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1095         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1096                         rxon->ofdm_basic_rates);
1097         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1098         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1099         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1100         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1101 }
1102 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1103 #endif
1104 /**
1105  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1106  */
1107 void iwl_irq_handle_error(struct iwl_priv *priv)
1108 {
1109         /* Set the FW error flag -- cleared on iwl_down */
1110         set_bit(STATUS_FW_ERROR, &priv->status);
1111
1112         /* Cancel currently queued command. */
1113         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1114
1115         IWL_ERR(priv, "Loaded firmware version: %s\n",
1116                 priv->hw->wiphy->fw_version);
1117
1118         priv->cfg->ops->lib->dump_nic_error_log(priv);
1119         if (priv->cfg->ops->lib->dump_csr)
1120                 priv->cfg->ops->lib->dump_csr(priv);
1121         if (priv->cfg->ops->lib->dump_fh)
1122                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1123         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1124 #ifdef CONFIG_IWLWIFI_DEBUG
1125         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1126                 iwl_print_rx_config_cmd(priv);
1127 #endif
1128
1129         wake_up_interruptible(&priv->wait_command_queue);
1130
1131         /* Keep the restart process from trying to send host
1132          * commands by clearing the INIT status bit */
1133         clear_bit(STATUS_READY, &priv->status);
1134
1135         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1136                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1137                           "Restarting adapter due to uCode error.\n");
1138
1139                 if (priv->cfg->mod_params->restart_fw)
1140                         queue_work(priv->workqueue, &priv->restart);
1141         }
1142 }
1143 EXPORT_SYMBOL(iwl_irq_handle_error);
1144
1145 static int iwl_apm_stop_master(struct iwl_priv *priv)
1146 {
1147         int ret = 0;
1148
1149         /* stop device's busmaster DMA activity */
1150         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1151
1152         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1153                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1154         if (ret)
1155                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1156
1157         IWL_DEBUG_INFO(priv, "stop master\n");
1158
1159         return ret;
1160 }
1161
1162 void iwl_apm_stop(struct iwl_priv *priv)
1163 {
1164         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1165
1166         /* Stop device's DMA activity */
1167         iwl_apm_stop_master(priv);
1168
1169         /* Reset the entire device */
1170         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1171
1172         udelay(10);
1173
1174         /*
1175          * Clear "initialization complete" bit to move adapter from
1176          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1177          */
1178         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1179 }
1180 EXPORT_SYMBOL(iwl_apm_stop);
1181
1182
1183 /*
1184  * Start up NIC's basic functionality after it has been reset
1185  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1186  * NOTE:  This does not load uCode nor start the embedded processor
1187  */
1188 int iwl_apm_init(struct iwl_priv *priv)
1189 {
1190         int ret = 0;
1191         u16 lctl;
1192
1193         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1194
1195         /*
1196          * Use "set_bit" below rather than "write", to preserve any hardware
1197          * bits already set by default after reset.
1198          */
1199
1200         /* Disable L0S exit timer (platform NMI Work/Around) */
1201         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1202                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1203
1204         /*
1205          * Disable L0s without affecting L1;
1206          *  don't wait for ICH L0s (ICH bug W/A)
1207          */
1208         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1209                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1210
1211         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1212         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1213
1214         /*
1215          * Enable HAP INTA (interrupt from management bus) to
1216          * wake device's PCI Express link L1a -> L0s
1217          * NOTE:  This is no-op for 3945 (non-existant bit)
1218          */
1219         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1220                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1221
1222         /*
1223          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1224          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1225          * If so (likely), disable L0S, so device moves directly L0->L1;
1226          *    costs negligible amount of power savings.
1227          * If not (unlikely), enable L0S, so there is at least some
1228          *    power savings, even without L1.
1229          */
1230         if (priv->cfg->set_l0s) {
1231                 lctl = iwl_pcie_link_ctl(priv);
1232                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1233                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1234                         /* L1-ASPM enabled; disable(!) L0S  */
1235                         iwl_set_bit(priv, CSR_GIO_REG,
1236                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1237                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1238                 } else {
1239                         /* L1-ASPM disabled; enable(!) L0S */
1240                         iwl_clear_bit(priv, CSR_GIO_REG,
1241                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1242                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1243                 }
1244         }
1245
1246         /* Configure analog phase-lock-loop before activating to D0A */
1247         if (priv->cfg->pll_cfg_val)
1248                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1249
1250         /*
1251          * Set "initialization complete" bit to move adapter from
1252          * D0U* --> D0A* (powered-up active) state.
1253          */
1254         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1255
1256         /*
1257          * Wait for clock stabilization; once stabilized, access to
1258          * device-internal resources is supported, e.g. iwl_write_prph()
1259          * and accesses to uCode SRAM.
1260          */
1261         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1262                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1263                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1264         if (ret < 0) {
1265                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1266                 goto out;
1267         }
1268
1269         /*
1270          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1271          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1272          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1273          * and don't need BSM to restore data after power-saving sleep.
1274          *
1275          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1276          * do not disable clocks.  This preserves any hardware bits already
1277          * set by default in "CLK_CTRL_REG" after reset.
1278          */
1279         if (priv->cfg->use_bsm)
1280                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1281                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1282         else
1283                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1284                         APMG_CLK_VAL_DMA_CLK_RQT);
1285         udelay(20);
1286
1287         /* Disable L1-Active */
1288         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1289                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1290
1291 out:
1292         return ret;
1293 }
1294 EXPORT_SYMBOL(iwl_apm_init);
1295
1296
1297
1298 void iwl_configure_filter(struct ieee80211_hw *hw,
1299                           unsigned int changed_flags,
1300                           unsigned int *total_flags,
1301                           u64 multicast)
1302 {
1303         struct iwl_priv *priv = hw->priv;
1304         __le32 filter_or = 0, filter_nand = 0;
1305
1306 #define CHK(test, flag) do { \
1307         if (*total_flags & (test))              \
1308                 filter_or |= (flag);            \
1309         else                                    \
1310                 filter_nand |= (flag);          \
1311         } while (0)
1312
1313         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1314                         changed_flags, *total_flags);
1315
1316         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1317         CHK(FIF_ALLMULTI, RXON_FILTER_ACCEPT_GRP_MSK);
1318         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1319         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1320
1321 #undef CHK
1322
1323         mutex_lock(&priv->mutex);
1324
1325         priv->staging_rxon.filter_flags &= ~filter_nand;
1326         priv->staging_rxon.filter_flags |= filter_or;
1327
1328         iwlcore_commit_rxon(priv);
1329
1330         mutex_unlock(&priv->mutex);
1331
1332         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1333                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1334 }
1335 EXPORT_SYMBOL(iwl_configure_filter);
1336
1337 int iwl_set_hw_params(struct iwl_priv *priv)
1338 {
1339         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1340         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1341         if (priv->cfg->mod_params->amsdu_size_8K)
1342                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1343         else
1344                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1345
1346         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1347
1348         if (priv->cfg->mod_params->disable_11n)
1349                 priv->cfg->sku &= ~IWL_SKU_N;
1350
1351         /* Device-specific setup */
1352         return priv->cfg->ops->lib->set_hw_params(priv);
1353 }
1354 EXPORT_SYMBOL(iwl_set_hw_params);
1355
1356 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1357 {
1358         int ret = 0;
1359         s8 prev_tx_power = priv->tx_power_user_lmt;
1360
1361         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1362                 IWL_WARN(priv,
1363                          "Requested user TXPOWER %d below lower limit %d.\n",
1364                          tx_power,
1365                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1366                 return -EINVAL;
1367         }
1368
1369         if (tx_power > priv->tx_power_device_lmt) {
1370                 IWL_WARN(priv,
1371                         "Requested user TXPOWER %d above upper limit %d.\n",
1372                          tx_power, priv->tx_power_device_lmt);
1373                 return -EINVAL;
1374         }
1375
1376         if (priv->tx_power_user_lmt != tx_power)
1377                 force = true;
1378
1379         /* if nic is not up don't send command */
1380         if (iwl_is_ready_rf(priv)) {
1381                 priv->tx_power_user_lmt = tx_power;
1382                 if (force && priv->cfg->ops->lib->send_tx_power)
1383                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1384                 else if (!priv->cfg->ops->lib->send_tx_power)
1385                         ret = -EOPNOTSUPP;
1386                 /*
1387                  * if fail to set tx_power, restore the orig. tx power
1388                  */
1389                 if (ret)
1390                         priv->tx_power_user_lmt = prev_tx_power;
1391         }
1392
1393         /*
1394          * Even this is an async host command, the command
1395          * will always report success from uCode
1396          * So once driver can placing the command into the queue
1397          * successfully, driver can use priv->tx_power_user_lmt
1398          * to reflect the current tx power
1399          */
1400         return ret;
1401 }
1402 EXPORT_SYMBOL(iwl_set_tx_power);
1403
1404 irqreturn_t iwl_isr_legacy(int irq, void *data)
1405 {
1406         struct iwl_priv *priv = data;
1407         u32 inta, inta_mask;
1408         u32 inta_fh;
1409         unsigned long flags;
1410         if (!priv)
1411                 return IRQ_NONE;
1412
1413         spin_lock_irqsave(&priv->lock, flags);
1414
1415         /* Disable (but don't clear!) interrupts here to avoid
1416          *    back-to-back ISRs and sporadic interrupts from our NIC.
1417          * If we have something to service, the tasklet will re-enable ints.
1418          * If we *don't* have something, we'll re-enable before leaving here. */
1419         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1420         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1421
1422         /* Discover which interrupts are active/pending */
1423         inta = iwl_read32(priv, CSR_INT);
1424         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1425
1426         /* Ignore interrupt if there's nothing in NIC to service.
1427          * This may be due to IRQ shared with another device,
1428          * or due to sporadic interrupts thrown from our NIC. */
1429         if (!inta && !inta_fh) {
1430                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1431                 goto none;
1432         }
1433
1434         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1435                 /* Hardware disappeared. It might have already raised
1436                  * an interrupt */
1437                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1438                 goto unplugged;
1439         }
1440
1441         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1442                       inta, inta_mask, inta_fh);
1443
1444         inta &= ~CSR_INT_BIT_SCD;
1445
1446         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1447         if (likely(inta || inta_fh))
1448                 tasklet_schedule(&priv->irq_tasklet);
1449
1450  unplugged:
1451         spin_unlock_irqrestore(&priv->lock, flags);
1452         return IRQ_HANDLED;
1453
1454  none:
1455         /* re-enable interrupts here since we don't have anything to service. */
1456         /* only Re-enable if diabled by irq */
1457         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1458                 iwl_enable_interrupts(priv);
1459         spin_unlock_irqrestore(&priv->lock, flags);
1460         return IRQ_NONE;
1461 }
1462 EXPORT_SYMBOL(iwl_isr_legacy);
1463
1464 void iwl_send_bt_config(struct iwl_priv *priv)
1465 {
1466         struct iwl_bt_cmd bt_cmd = {
1467                 .lead_time = BT_LEAD_TIME_DEF,
1468                 .max_kill = BT_MAX_KILL_DEF,
1469                 .kill_ack_mask = 0,
1470                 .kill_cts_mask = 0,
1471         };
1472
1473         if (!bt_coex_active)
1474                 bt_cmd.flags = BT_COEX_DISABLE;
1475         else
1476                 bt_cmd.flags = BT_COEX_ENABLE;
1477
1478         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1479                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1480
1481         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1482                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1483                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1484 }
1485 EXPORT_SYMBOL(iwl_send_bt_config);
1486
1487 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1488 {
1489         struct iwl_statistics_cmd statistics_cmd = {
1490                 .configuration_flags =
1491                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1492         };
1493
1494         if (flags & CMD_ASYNC)
1495                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1496                                                sizeof(struct iwl_statistics_cmd),
1497                                                &statistics_cmd, NULL);
1498         else
1499                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1500                                         sizeof(struct iwl_statistics_cmd),
1501                                         &statistics_cmd);
1502 }
1503 EXPORT_SYMBOL(iwl_send_statistics_request);
1504
1505 /**
1506  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1507  *   using sample data 100 bytes apart.  If these sample points are good,
1508  *   it's a pretty good bet that everything between them is good, too.
1509  */
1510 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1511 {
1512         u32 val;
1513         int ret = 0;
1514         u32 errcnt = 0;
1515         u32 i;
1516
1517         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1518
1519         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1520                 /* read data comes through single port, auto-incr addr */
1521                 /* NOTE: Use the debugless read so we don't flood kernel log
1522                  * if IWL_DL_IO is set */
1523                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1524                         i + IWL49_RTC_INST_LOWER_BOUND);
1525                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1526                 if (val != le32_to_cpu(*image)) {
1527                         ret = -EIO;
1528                         errcnt++;
1529                         if (errcnt >= 3)
1530                                 break;
1531                 }
1532         }
1533
1534         return ret;
1535 }
1536
1537 /**
1538  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1539  *     looking at all data.
1540  */
1541 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1542                                  u32 len)
1543 {
1544         u32 val;
1545         u32 save_len = len;
1546         int ret = 0;
1547         u32 errcnt;
1548
1549         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1550
1551         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1552                            IWL49_RTC_INST_LOWER_BOUND);
1553
1554         errcnt = 0;
1555         for (; len > 0; len -= sizeof(u32), image++) {
1556                 /* read data comes through single port, auto-incr addr */
1557                 /* NOTE: Use the debugless read so we don't flood kernel log
1558                  * if IWL_DL_IO is set */
1559                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1560                 if (val != le32_to_cpu(*image)) {
1561                         IWL_ERR(priv, "uCode INST section is invalid at "
1562                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1563                                   save_len - len, val, le32_to_cpu(*image));
1564                         ret = -EIO;
1565                         errcnt++;
1566                         if (errcnt >= 20)
1567                                 break;
1568                 }
1569         }
1570
1571         if (!errcnt)
1572                 IWL_DEBUG_INFO(priv,
1573                     "ucode image in INSTRUCTION memory is good\n");
1574
1575         return ret;
1576 }
1577
1578 /**
1579  * iwl_verify_ucode - determine which instruction image is in SRAM,
1580  *    and verify its contents
1581  */
1582 int iwl_verify_ucode(struct iwl_priv *priv)
1583 {
1584         __le32 *image;
1585         u32 len;
1586         int ret;
1587
1588         /* Try bootstrap */
1589         image = (__le32 *)priv->ucode_boot.v_addr;
1590         len = priv->ucode_boot.len;
1591         ret = iwlcore_verify_inst_sparse(priv, image, len);
1592         if (!ret) {
1593                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1594                 return 0;
1595         }
1596
1597         /* Try initialize */
1598         image = (__le32 *)priv->ucode_init.v_addr;
1599         len = priv->ucode_init.len;
1600         ret = iwlcore_verify_inst_sparse(priv, image, len);
1601         if (!ret) {
1602                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1603                 return 0;
1604         }
1605
1606         /* Try runtime/protocol */
1607         image = (__le32 *)priv->ucode_code.v_addr;
1608         len = priv->ucode_code.len;
1609         ret = iwlcore_verify_inst_sparse(priv, image, len);
1610         if (!ret) {
1611                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1612                 return 0;
1613         }
1614
1615         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1616
1617         /* Since nothing seems to match, show first several data entries in
1618          * instruction SRAM, so maybe visual inspection will give a clue.
1619          * Selection of bootstrap image (vs. other images) is arbitrary. */
1620         image = (__le32 *)priv->ucode_boot.v_addr;
1621         len = priv->ucode_boot.len;
1622         ret = iwl_verify_inst_full(priv, image, len);
1623
1624         return ret;
1625 }
1626 EXPORT_SYMBOL(iwl_verify_ucode);
1627
1628
1629 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1630 {
1631         struct iwl_ct_kill_config cmd;
1632         struct iwl_ct_kill_throttling_config adv_cmd;
1633         unsigned long flags;
1634         int ret = 0;
1635
1636         spin_lock_irqsave(&priv->lock, flags);
1637         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1638                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1639         spin_unlock_irqrestore(&priv->lock, flags);
1640         priv->thermal_throttle.ct_kill_toggle = false;
1641
1642         if (priv->cfg->support_ct_kill_exit) {
1643                 adv_cmd.critical_temperature_enter =
1644                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1645                 adv_cmd.critical_temperature_exit =
1646                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1647
1648                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1649                                        sizeof(adv_cmd), &adv_cmd);
1650                 if (ret)
1651                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1652                 else
1653                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1654                                         "succeeded, "
1655                                         "critical temperature enter is %d,"
1656                                         "exit is %d\n",
1657                                        priv->hw_params.ct_kill_threshold,
1658                                        priv->hw_params.ct_kill_exit_threshold);
1659         } else {
1660                 cmd.critical_temperature_R =
1661                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1662
1663                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1664                                        sizeof(cmd), &cmd);
1665                 if (ret)
1666                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1667                 else
1668                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1669                                         "succeeded, "
1670                                         "critical temperature is %d\n",
1671                                         priv->hw_params.ct_kill_threshold);
1672         }
1673 }
1674 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1675
1676
1677 /*
1678  * CARD_STATE_CMD
1679  *
1680  * Use: Sets the device's internal card state to enable, disable, or halt
1681  *
1682  * When in the 'enable' state the card operates as normal.
1683  * When in the 'disable' state, the card enters into a low power mode.
1684  * When in the 'halt' state, the card is shut down and must be fully
1685  * restarted to come back on.
1686  */
1687 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1688 {
1689         struct iwl_host_cmd cmd = {
1690                 .id = REPLY_CARD_STATE_CMD,
1691                 .len = sizeof(u32),
1692                 .data = &flags,
1693                 .flags = meta_flag,
1694         };
1695
1696         return iwl_send_cmd(priv, &cmd);
1697 }
1698
1699 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1700                            struct iwl_rx_mem_buffer *rxb)
1701 {
1702 #ifdef CONFIG_IWLWIFI_DEBUG
1703         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1704         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1705         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1706                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1707 #endif
1708 }
1709 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1710
1711 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1712                                       struct iwl_rx_mem_buffer *rxb)
1713 {
1714         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1715         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1716         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1717                         "notification for %s:\n", len,
1718                         get_cmd_string(pkt->hdr.cmd));
1719         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1720 }
1721 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1722
1723 void iwl_rx_reply_error(struct iwl_priv *priv,
1724                         struct iwl_rx_mem_buffer *rxb)
1725 {
1726         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1727
1728         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1729                 "seq 0x%04X ser 0x%08X\n",
1730                 le32_to_cpu(pkt->u.err_resp.error_type),
1731                 get_cmd_string(pkt->u.err_resp.cmd_id),
1732                 pkt->u.err_resp.cmd_id,
1733                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1734                 le32_to_cpu(pkt->u.err_resp.error_info));
1735 }
1736 EXPORT_SYMBOL(iwl_rx_reply_error);
1737
1738 void iwl_clear_isr_stats(struct iwl_priv *priv)
1739 {
1740         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1741 }
1742
1743 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1744                            const struct ieee80211_tx_queue_params *params)
1745 {
1746         struct iwl_priv *priv = hw->priv;
1747         unsigned long flags;
1748         int q;
1749
1750         IWL_DEBUG_MAC80211(priv, "enter\n");
1751
1752         if (!iwl_is_ready_rf(priv)) {
1753                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1754                 return -EIO;
1755         }
1756
1757         if (queue >= AC_NUM) {
1758                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1759                 return 0;
1760         }
1761
1762         q = AC_NUM - 1 - queue;
1763
1764         spin_lock_irqsave(&priv->lock, flags);
1765
1766         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1767         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1768         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1769         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1770                         cpu_to_le16((params->txop * 32));
1771
1772         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1773
1774         spin_unlock_irqrestore(&priv->lock, flags);
1775
1776         IWL_DEBUG_MAC80211(priv, "leave\n");
1777         return 0;
1778 }
1779 EXPORT_SYMBOL(iwl_mac_conf_tx);
1780
1781 static void iwl_ht_conf(struct iwl_priv *priv,
1782                         struct ieee80211_vif *vif)
1783 {
1784         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1785         struct ieee80211_sta *sta;
1786         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1787
1788         IWL_DEBUG_MAC80211(priv, "enter:\n");
1789
1790         if (!ht_conf->is_ht)
1791                 return;
1792
1793         ht_conf->ht_protection =
1794                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1795         ht_conf->non_GF_STA_present =
1796                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1797
1798         ht_conf->single_chain_sufficient = false;
1799
1800         switch (vif->type) {
1801         case NL80211_IFTYPE_STATION:
1802                 rcu_read_lock();
1803                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1804                 if (sta) {
1805                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1806                         int maxstreams;
1807
1808                         maxstreams = (ht_cap->mcs.tx_params &
1809                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1810                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1811                         maxstreams += 1;
1812
1813                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1814                             (ht_cap->mcs.rx_mask[2] == 0))
1815                                 ht_conf->single_chain_sufficient = true;
1816                         if (maxstreams <= 1)
1817                                 ht_conf->single_chain_sufficient = true;
1818                 } else {
1819                         /*
1820                          * If at all, this can only happen through a race
1821                          * when the AP disconnects us while we're still
1822                          * setting up the connection, in that case mac80211
1823                          * will soon tell us about that.
1824                          */
1825                         ht_conf->single_chain_sufficient = true;
1826                 }
1827                 rcu_read_unlock();
1828                 break;
1829         case NL80211_IFTYPE_ADHOC:
1830                 ht_conf->single_chain_sufficient = true;
1831                 break;
1832         default:
1833                 break;
1834         }
1835
1836         IWL_DEBUG_MAC80211(priv, "leave\n");
1837 }
1838
1839 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1840 {
1841         iwl_led_disassociate(priv);
1842         /*
1843          * inform the ucode that there is no longer an
1844          * association and that no more packets should be
1845          * sent
1846          */
1847         priv->staging_rxon.filter_flags &=
1848                 ~RXON_FILTER_ASSOC_MSK;
1849         priv->staging_rxon.assoc_id = 0;
1850         iwlcore_commit_rxon(priv);
1851 }
1852
1853 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1854                           struct ieee80211_vif *vif,
1855                           struct ieee80211_bss_conf *bss_conf,
1856                           u32 changes)
1857 {
1858         struct iwl_priv *priv = hw->priv;
1859         int ret;
1860
1861         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1862
1863         if (!iwl_is_alive(priv))
1864                 return;
1865
1866         mutex_lock(&priv->mutex);
1867
1868         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1869                 dev_kfree_skb(priv->ibss_beacon);
1870                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1871         }
1872
1873         if (changes & BSS_CHANGED_BEACON_INT) {
1874                 /* TODO: in AP mode, do something to make this take effect */
1875         }
1876
1877         if (changes & BSS_CHANGED_BSSID) {
1878                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1879
1880                 /*
1881                  * If there is currently a HW scan going on in the
1882                  * background then we need to cancel it else the RXON
1883                  * below/in post_associate will fail.
1884                  */
1885                 if (iwl_scan_cancel_timeout(priv, 100)) {
1886                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1887                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1888                         mutex_unlock(&priv->mutex);
1889                         return;
1890                 }
1891
1892                 /* mac80211 only sets assoc when in STATION mode */
1893                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1894                         memcpy(priv->staging_rxon.bssid_addr,
1895                                bss_conf->bssid, ETH_ALEN);
1896
1897                         /* currently needed in a few places */
1898                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1899                 } else {
1900                         priv->staging_rxon.filter_flags &=
1901                                 ~RXON_FILTER_ASSOC_MSK;
1902                 }
1903
1904         }
1905
1906         /*
1907          * This needs to be after setting the BSSID in case
1908          * mac80211 decides to do both changes at once because
1909          * it will invoke post_associate.
1910          */
1911         if (vif->type == NL80211_IFTYPE_ADHOC &&
1912             changes & BSS_CHANGED_BEACON) {
1913                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1914
1915                 if (beacon)
1916                         iwl_mac_beacon_update(hw, beacon);
1917         }
1918
1919         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1920                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1921                                    bss_conf->use_short_preamble);
1922                 if (bss_conf->use_short_preamble)
1923                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1924                 else
1925                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1926         }
1927
1928         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1929                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1930                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1931                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1932                 else
1933                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1934         }
1935
1936         if (changes & BSS_CHANGED_BASIC_RATES) {
1937                 /* XXX use this information
1938                  *
1939                  * To do that, remove code from iwl_set_rate() and put something
1940                  * like this here:
1941                  *
1942                 if (A-band)
1943                         priv->staging_rxon.ofdm_basic_rates =
1944                                 bss_conf->basic_rates;
1945                 else
1946                         priv->staging_rxon.ofdm_basic_rates =
1947                                 bss_conf->basic_rates >> 4;
1948                         priv->staging_rxon.cck_basic_rates =
1949                                 bss_conf->basic_rates & 0xF;
1950                  */
1951         }
1952
1953         if (changes & BSS_CHANGED_HT) {
1954                 iwl_ht_conf(priv, vif);
1955
1956                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1957                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1958         }
1959
1960         if (changes & BSS_CHANGED_ASSOC) {
1961                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1962                 if (bss_conf->assoc) {
1963                         priv->timestamp = bss_conf->timestamp;
1964
1965                         iwl_led_associate(priv);
1966
1967                         if (!iwl_is_rfkill(priv))
1968                                 priv->cfg->ops->lib->post_associate(priv, vif);
1969                 } else
1970                         iwl_set_no_assoc(priv);
1971         }
1972
1973         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1974                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1975                                    changes);
1976                 ret = iwl_send_rxon_assoc(priv);
1977                 if (!ret) {
1978                         /* Sync active_rxon with latest change. */
1979                         memcpy((void *)&priv->active_rxon,
1980                                 &priv->staging_rxon,
1981                                 sizeof(struct iwl_rxon_cmd));
1982                 }
1983         }
1984
1985         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1986                 if (vif->bss_conf.enable_beacon) {
1987                         memcpy(priv->staging_rxon.bssid_addr,
1988                                bss_conf->bssid, ETH_ALEN);
1989                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1990                         iwlcore_config_ap(priv, vif);
1991                 } else
1992                         iwl_set_no_assoc(priv);
1993         }
1994
1995         if (changes & BSS_CHANGED_IBSS) {
1996                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1997                                                         bss_conf->ibss_joined);
1998                 if (ret)
1999                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2000                                 bss_conf->ibss_joined ? "add" : "remove",
2001                                 bss_conf->bssid);
2002         }
2003
2004         mutex_unlock(&priv->mutex);
2005
2006         IWL_DEBUG_MAC80211(priv, "leave\n");
2007 }
2008 EXPORT_SYMBOL(iwl_bss_info_changed);
2009
2010 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2011 {
2012         struct iwl_priv *priv = hw->priv;
2013         unsigned long flags;
2014         __le64 timestamp;
2015
2016         IWL_DEBUG_MAC80211(priv, "enter\n");
2017
2018         if (!iwl_is_ready_rf(priv)) {
2019                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2020                 return -EIO;
2021         }
2022
2023         spin_lock_irqsave(&priv->lock, flags);
2024
2025         if (priv->ibss_beacon)
2026                 dev_kfree_skb(priv->ibss_beacon);
2027
2028         priv->ibss_beacon = skb;
2029
2030         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2031         priv->timestamp = le64_to_cpu(timestamp);
2032
2033         IWL_DEBUG_MAC80211(priv, "leave\n");
2034         spin_unlock_irqrestore(&priv->lock, flags);
2035
2036         priv->cfg->ops->lib->post_associate(priv, priv->vif);
2037
2038         return 0;
2039 }
2040 EXPORT_SYMBOL(iwl_mac_beacon_update);
2041
2042 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2043 {
2044         iwl_connection_init_rx_config(priv, vif);
2045
2046         if (priv->cfg->ops->hcmd->set_rxon_chain)
2047                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2048
2049         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2050
2051         return iwlcore_commit_rxon(priv);
2052 }
2053
2054 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2055 {
2056         struct iwl_priv *priv = hw->priv;
2057         int err = 0;
2058
2059         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2060
2061         mutex_lock(&priv->mutex);
2062
2063         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2064                 err = -EINVAL;
2065                 goto out;
2066         }
2067
2068         if (priv->vif) {
2069                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2070                 err = -EOPNOTSUPP;
2071                 goto out;
2072         }
2073
2074         priv->vif = vif;
2075         priv->iw_mode = vif->type;
2076
2077         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2078         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2079
2080         err = iwl_set_mode(priv, vif);
2081         if (err)
2082                 goto out_err;
2083
2084         goto out;
2085
2086  out_err:
2087         priv->vif = NULL;
2088         priv->iw_mode = NL80211_IFTYPE_STATION;
2089  out:
2090         mutex_unlock(&priv->mutex);
2091
2092         IWL_DEBUG_MAC80211(priv, "leave\n");
2093         return err;
2094 }
2095 EXPORT_SYMBOL(iwl_mac_add_interface);
2096
2097 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2098                               struct ieee80211_vif *vif)
2099 {
2100         struct iwl_priv *priv = hw->priv;
2101
2102         IWL_DEBUG_MAC80211(priv, "enter\n");
2103
2104         mutex_lock(&priv->mutex);
2105
2106         if (iwl_is_ready_rf(priv)) {
2107                 iwl_scan_cancel_timeout(priv, 100);
2108                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2109                 iwlcore_commit_rxon(priv);
2110         }
2111         if (priv->vif == vif) {
2112                 priv->vif = NULL;
2113                 memset(priv->bssid, 0, ETH_ALEN);
2114         }
2115         mutex_unlock(&priv->mutex);
2116
2117         IWL_DEBUG_MAC80211(priv, "leave\n");
2118
2119 }
2120 EXPORT_SYMBOL(iwl_mac_remove_interface);
2121
2122 /**
2123  * iwl_mac_config - mac80211 config callback
2124  */
2125 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2126 {
2127         struct iwl_priv *priv = hw->priv;
2128         const struct iwl_channel_info *ch_info;
2129         struct ieee80211_conf *conf = &hw->conf;
2130         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2131         unsigned long flags = 0;
2132         int ret = 0;
2133         u16 ch;
2134         int scan_active = 0;
2135
2136         mutex_lock(&priv->mutex);
2137
2138         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2139                                         conf->channel->hw_value, changed);
2140
2141         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2142                         test_bit(STATUS_SCANNING, &priv->status))) {
2143                 scan_active = 1;
2144                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2145         }
2146
2147         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2148                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2149                 /* mac80211 uses static for non-HT which is what we want */
2150                 priv->current_ht_config.smps = conf->smps_mode;
2151
2152                 /*
2153                  * Recalculate chain counts.
2154                  *
2155                  * If monitor mode is enabled then mac80211 will
2156                  * set up the SM PS mode to OFF if an HT channel is
2157                  * configured.
2158                  */
2159                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2160                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2161         }
2162
2163         /* during scanning mac80211 will delay channel setting until
2164          * scan finish with changed = 0
2165          */
2166         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2167                 if (scan_active)
2168                         goto set_ch_out;
2169
2170                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2171                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2172                 if (!is_channel_valid(ch_info)) {
2173                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2174                         ret = -EINVAL;
2175                         goto set_ch_out;
2176                 }
2177
2178                 spin_lock_irqsave(&priv->lock, flags);
2179
2180                 /* Configure HT40 channels */
2181                 ht_conf->is_ht = conf_is_ht(conf);
2182                 if (ht_conf->is_ht) {
2183                         if (conf_is_ht40_minus(conf)) {
2184                                 ht_conf->extension_chan_offset =
2185                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2186                                 ht_conf->is_40mhz = true;
2187                         } else if (conf_is_ht40_plus(conf)) {
2188                                 ht_conf->extension_chan_offset =
2189                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2190                                 ht_conf->is_40mhz = true;
2191                         } else {
2192                                 ht_conf->extension_chan_offset =
2193                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2194                                 ht_conf->is_40mhz = false;
2195                         }
2196                 } else
2197                         ht_conf->is_40mhz = false;
2198                 /* Default to no protection. Protection mode will later be set
2199                  * from BSS config in iwl_ht_conf */
2200                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2201
2202                 /* if we are switching from ht to 2.4 clear flags
2203                  * from any ht related info since 2.4 does not
2204                  * support ht */
2205                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2206                         priv->staging_rxon.flags = 0;
2207
2208                 iwl_set_rxon_channel(priv, conf->channel);
2209                 iwl_set_rxon_ht(priv, ht_conf);
2210
2211                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2212                 spin_unlock_irqrestore(&priv->lock, flags);
2213                 if (iwl_is_associated(priv) &&
2214                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2215                     priv->cfg->ops->lib->set_channel_switch) {
2216                         iwl_set_rate(priv);
2217                         /*
2218                          * at this point, staging_rxon has the
2219                          * configuration for channel switch
2220                          */
2221                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2222                                 ch);
2223                         if (!ret) {
2224                                 iwl_print_rx_config_cmd(priv);
2225                                 goto out;
2226                         }
2227                         priv->switch_rxon.switch_in_progress = false;
2228                 }
2229  set_ch_out:
2230                 /* The list of supported rates and rate mask can be different
2231                  * for each band; since the band may have changed, reset
2232                  * the rate mask to what mac80211 lists */
2233                 iwl_set_rate(priv);
2234         }
2235
2236         if (changed & (IEEE80211_CONF_CHANGE_PS |
2237                         IEEE80211_CONF_CHANGE_IDLE)) {
2238                 ret = iwl_power_update_mode(priv, false);
2239                 if (ret)
2240                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2241         }
2242
2243         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2244                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2245                         priv->tx_power_user_lmt, conf->power_level);
2246
2247                 iwl_set_tx_power(priv, conf->power_level, false);
2248         }
2249
2250         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2251                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2252
2253                 spin_lock_irqsave(&priv->lock, flags);
2254                 priv->qos_data.qos_active = qos_active;
2255                 iwl_update_qos(priv);
2256                 spin_unlock_irqrestore(&priv->lock, flags);
2257         }
2258
2259         if (!iwl_is_ready(priv)) {
2260                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2261                 goto out;
2262         }
2263
2264         if (scan_active)
2265                 goto out;
2266
2267         if (memcmp(&priv->active_rxon,
2268                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2269                 iwlcore_commit_rxon(priv);
2270         else
2271                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2272
2273
2274 out:
2275         IWL_DEBUG_MAC80211(priv, "leave\n");
2276         mutex_unlock(&priv->mutex);
2277         return ret;
2278 }
2279 EXPORT_SYMBOL(iwl_mac_config);
2280
2281 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2282 {
2283         struct iwl_priv *priv = hw->priv;
2284         unsigned long flags;
2285
2286         mutex_lock(&priv->mutex);
2287         IWL_DEBUG_MAC80211(priv, "enter\n");
2288
2289         spin_lock_irqsave(&priv->lock, flags);
2290         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2291         spin_unlock_irqrestore(&priv->lock, flags);
2292
2293         spin_lock_irqsave(&priv->lock, flags);
2294
2295         /* new association get rid of ibss beacon skb */
2296         if (priv->ibss_beacon)
2297                 dev_kfree_skb(priv->ibss_beacon);
2298
2299         priv->ibss_beacon = NULL;
2300
2301         priv->timestamp = 0;
2302
2303         spin_unlock_irqrestore(&priv->lock, flags);
2304
2305         if (!iwl_is_ready_rf(priv)) {
2306                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2307                 mutex_unlock(&priv->mutex);
2308                 return;
2309         }
2310
2311         /* we are restarting association process
2312          * clear RXON_FILTER_ASSOC_MSK bit
2313          */
2314         iwl_scan_cancel_timeout(priv, 100);
2315         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2316         iwlcore_commit_rxon(priv);
2317
2318         iwl_set_rate(priv);
2319
2320         mutex_unlock(&priv->mutex);
2321
2322         IWL_DEBUG_MAC80211(priv, "leave\n");
2323 }
2324 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2325
2326 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2327 {
2328         if (!priv->txq)
2329                 priv->txq = kzalloc(
2330                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2331                         GFP_KERNEL);
2332         if (!priv->txq) {
2333                 IWL_ERR(priv, "Not enough memory for txq\n");
2334                 return -ENOMEM;
2335         }
2336         return 0;
2337 }
2338 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2339
2340 void iwl_free_txq_mem(struct iwl_priv *priv)
2341 {
2342         kfree(priv->txq);
2343         priv->txq = NULL;
2344 }
2345 EXPORT_SYMBOL(iwl_free_txq_mem);
2346
2347 #ifdef CONFIG_IWLWIFI_DEBUGFS
2348
2349 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2350
2351 void iwl_reset_traffic_log(struct iwl_priv *priv)
2352 {
2353         priv->tx_traffic_idx = 0;
2354         priv->rx_traffic_idx = 0;
2355         if (priv->tx_traffic)
2356                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2357         if (priv->rx_traffic)
2358                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2359 }
2360
2361 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2362 {
2363         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2364
2365         if (iwl_debug_level & IWL_DL_TX) {
2366                 if (!priv->tx_traffic) {
2367                         priv->tx_traffic =
2368                                 kzalloc(traffic_size, GFP_KERNEL);
2369                         if (!priv->tx_traffic)
2370                                 return -ENOMEM;
2371                 }
2372         }
2373         if (iwl_debug_level & IWL_DL_RX) {
2374                 if (!priv->rx_traffic) {
2375                         priv->rx_traffic =
2376                                 kzalloc(traffic_size, GFP_KERNEL);
2377                         if (!priv->rx_traffic)
2378                                 return -ENOMEM;
2379                 }
2380         }
2381         iwl_reset_traffic_log(priv);
2382         return 0;
2383 }
2384 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2385
2386 void iwl_free_traffic_mem(struct iwl_priv *priv)
2387 {
2388         kfree(priv->tx_traffic);
2389         priv->tx_traffic = NULL;
2390
2391         kfree(priv->rx_traffic);
2392         priv->rx_traffic = NULL;
2393 }
2394 EXPORT_SYMBOL(iwl_free_traffic_mem);
2395
2396 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2397                       u16 length, struct ieee80211_hdr *header)
2398 {
2399         __le16 fc;
2400         u16 len;
2401
2402         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2403                 return;
2404
2405         if (!priv->tx_traffic)
2406                 return;
2407
2408         fc = header->frame_control;
2409         if (ieee80211_is_data(fc)) {
2410                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2411                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2412                 memcpy((priv->tx_traffic +
2413                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2414                        header, len);
2415                 priv->tx_traffic_idx =
2416                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2417         }
2418 }
2419 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2420
2421 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2422                       u16 length, struct ieee80211_hdr *header)
2423 {
2424         __le16 fc;
2425         u16 len;
2426
2427         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2428                 return;
2429
2430         if (!priv->rx_traffic)
2431                 return;
2432
2433         fc = header->frame_control;
2434         if (ieee80211_is_data(fc)) {
2435                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2436                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2437                 memcpy((priv->rx_traffic +
2438                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2439                        header, len);
2440                 priv->rx_traffic_idx =
2441                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2442         }
2443 }
2444 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2445
2446 const char *get_mgmt_string(int cmd)
2447 {
2448         switch (cmd) {
2449                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2450                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2451                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2452                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2453                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2454                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2455                 IWL_CMD(MANAGEMENT_BEACON);
2456                 IWL_CMD(MANAGEMENT_ATIM);
2457                 IWL_CMD(MANAGEMENT_DISASSOC);
2458                 IWL_CMD(MANAGEMENT_AUTH);
2459                 IWL_CMD(MANAGEMENT_DEAUTH);
2460                 IWL_CMD(MANAGEMENT_ACTION);
2461         default:
2462                 return "UNKNOWN";
2463
2464         }
2465 }
2466
2467 const char *get_ctrl_string(int cmd)
2468 {
2469         switch (cmd) {
2470                 IWL_CMD(CONTROL_BACK_REQ);
2471                 IWL_CMD(CONTROL_BACK);
2472                 IWL_CMD(CONTROL_PSPOLL);
2473                 IWL_CMD(CONTROL_RTS);
2474                 IWL_CMD(CONTROL_CTS);
2475                 IWL_CMD(CONTROL_ACK);
2476                 IWL_CMD(CONTROL_CFEND);
2477                 IWL_CMD(CONTROL_CFENDACK);
2478         default:
2479                 return "UNKNOWN";
2480
2481         }
2482 }
2483
2484 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2485 {
2486         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2487         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2488         priv->led_tpt = 0;
2489 }
2490
2491 /*
2492  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2493  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2494  * Use debugFs to display the rx/rx_statistics
2495  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2496  * information will be recorded, but DATA pkt still will be recorded
2497  * for the reason of iwl_led.c need to control the led blinking based on
2498  * number of tx and rx data.
2499  *
2500  */
2501 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2502 {
2503         struct traffic_stats    *stats;
2504
2505         if (is_tx)
2506                 stats = &priv->tx_stats;
2507         else
2508                 stats = &priv->rx_stats;
2509
2510         if (ieee80211_is_mgmt(fc)) {
2511                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2512                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2513                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2514                         break;
2515                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2516                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2517                         break;
2518                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2519                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2520                         break;
2521                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2522                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2523                         break;
2524                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2525                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2526                         break;
2527                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2528                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2529                         break;
2530                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2531                         stats->mgmt[MANAGEMENT_BEACON]++;
2532                         break;
2533                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2534                         stats->mgmt[MANAGEMENT_ATIM]++;
2535                         break;
2536                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2537                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2538                         break;
2539                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2540                         stats->mgmt[MANAGEMENT_AUTH]++;
2541                         break;
2542                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2543                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2544                         break;
2545                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2546                         stats->mgmt[MANAGEMENT_ACTION]++;
2547                         break;
2548                 }
2549         } else if (ieee80211_is_ctl(fc)) {
2550                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2551                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2552                         stats->ctrl[CONTROL_BACK_REQ]++;
2553                         break;
2554                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2555                         stats->ctrl[CONTROL_BACK]++;
2556                         break;
2557                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2558                         stats->ctrl[CONTROL_PSPOLL]++;
2559                         break;
2560                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2561                         stats->ctrl[CONTROL_RTS]++;
2562                         break;
2563                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2564                         stats->ctrl[CONTROL_CTS]++;
2565                         break;
2566                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2567                         stats->ctrl[CONTROL_ACK]++;
2568                         break;
2569                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2570                         stats->ctrl[CONTROL_CFEND]++;
2571                         break;
2572                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2573                         stats->ctrl[CONTROL_CFENDACK]++;
2574                         break;
2575                 }
2576         } else {
2577                 /* data */
2578                 stats->data_cnt++;
2579                 stats->data_bytes += len;
2580         }
2581         iwl_leds_background(priv);
2582 }
2583 EXPORT_SYMBOL(iwl_update_stats);
2584 #endif
2585
2586 const static char *get_csr_string(int cmd)
2587 {
2588         switch (cmd) {
2589                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2590                 IWL_CMD(CSR_INT_COALESCING);
2591                 IWL_CMD(CSR_INT);
2592                 IWL_CMD(CSR_INT_MASK);
2593                 IWL_CMD(CSR_FH_INT_STATUS);
2594                 IWL_CMD(CSR_GPIO_IN);
2595                 IWL_CMD(CSR_RESET);
2596                 IWL_CMD(CSR_GP_CNTRL);
2597                 IWL_CMD(CSR_HW_REV);
2598                 IWL_CMD(CSR_EEPROM_REG);
2599                 IWL_CMD(CSR_EEPROM_GP);
2600                 IWL_CMD(CSR_OTP_GP_REG);
2601                 IWL_CMD(CSR_GIO_REG);
2602                 IWL_CMD(CSR_GP_UCODE_REG);
2603                 IWL_CMD(CSR_GP_DRIVER_REG);
2604                 IWL_CMD(CSR_UCODE_DRV_GP1);
2605                 IWL_CMD(CSR_UCODE_DRV_GP2);
2606                 IWL_CMD(CSR_LED_REG);
2607                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2608                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2609                 IWL_CMD(CSR_ANA_PLL_CFG);
2610                 IWL_CMD(CSR_HW_REV_WA_REG);
2611                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2612         default:
2613                 return "UNKNOWN";
2614
2615         }
2616 }
2617
2618 void iwl_dump_csr(struct iwl_priv *priv)
2619 {
2620         int i;
2621         u32 csr_tbl[] = {
2622                 CSR_HW_IF_CONFIG_REG,
2623                 CSR_INT_COALESCING,
2624                 CSR_INT,
2625                 CSR_INT_MASK,
2626                 CSR_FH_INT_STATUS,
2627                 CSR_GPIO_IN,
2628                 CSR_RESET,
2629                 CSR_GP_CNTRL,
2630                 CSR_HW_REV,
2631                 CSR_EEPROM_REG,
2632                 CSR_EEPROM_GP,
2633                 CSR_OTP_GP_REG,
2634                 CSR_GIO_REG,
2635                 CSR_GP_UCODE_REG,
2636                 CSR_GP_DRIVER_REG,
2637                 CSR_UCODE_DRV_GP1,
2638                 CSR_UCODE_DRV_GP2,
2639                 CSR_LED_REG,
2640                 CSR_DRAM_INT_TBL_REG,
2641                 CSR_GIO_CHICKEN_BITS,
2642                 CSR_ANA_PLL_CFG,
2643                 CSR_HW_REV_WA_REG,
2644                 CSR_DBG_HPET_MEM_REG
2645         };
2646         IWL_ERR(priv, "CSR values:\n");
2647         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2648                 "CSR_INT_PERIODIC_REG)\n");
2649         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2650                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2651                         get_csr_string(csr_tbl[i]),
2652                         iwl_read32(priv, csr_tbl[i]));
2653         }
2654 }
2655 EXPORT_SYMBOL(iwl_dump_csr);
2656
2657 const static char *get_fh_string(int cmd)
2658 {
2659         switch (cmd) {
2660                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2661                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2662                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2663                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2664                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2665                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2666                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2667                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2668                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2669         default:
2670                 return "UNKNOWN";
2671
2672         }
2673 }
2674
2675 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2676 {
2677         int i;
2678 #ifdef CONFIG_IWLWIFI_DEBUG
2679         int pos = 0;
2680         size_t bufsz = 0;
2681 #endif
2682         u32 fh_tbl[] = {
2683                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2684                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2685                 FH_RSCSR_CHNL0_WPTR,
2686                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2687                 FH_MEM_RSSR_SHARED_CTRL_REG,
2688                 FH_MEM_RSSR_RX_STATUS_REG,
2689                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2690                 FH_TSSR_TX_STATUS_REG,
2691                 FH_TSSR_TX_ERROR_REG
2692         };
2693 #ifdef CONFIG_IWLWIFI_DEBUG
2694         if (display) {
2695                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2696                 *buf = kmalloc(bufsz, GFP_KERNEL);
2697                 if (!*buf)
2698                         return -ENOMEM;
2699                 pos += scnprintf(*buf + pos, bufsz - pos,
2700                                 "FH register values:\n");
2701                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2702                         pos += scnprintf(*buf + pos, bufsz - pos,
2703                                 "  %34s: 0X%08x\n",
2704                                 get_fh_string(fh_tbl[i]),
2705                                 iwl_read_direct32(priv, fh_tbl[i]));
2706                 }
2707                 return pos;
2708         }
2709 #endif
2710         IWL_ERR(priv, "FH register values:\n");
2711         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2712                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2713                         get_fh_string(fh_tbl[i]),
2714                         iwl_read_direct32(priv, fh_tbl[i]));
2715         }
2716         return 0;
2717 }
2718 EXPORT_SYMBOL(iwl_dump_fh);
2719
2720 static void iwl_force_rf_reset(struct iwl_priv *priv)
2721 {
2722         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2723                 return;
2724
2725         if (!iwl_is_associated(priv)) {
2726                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2727                 return;
2728         }
2729         /*
2730          * There is no easy and better way to force reset the radio,
2731          * the only known method is switching channel which will force to
2732          * reset and tune the radio.
2733          * Use internal short scan (single channel) operation to should
2734          * achieve this objective.
2735          * Driver should reset the radio when number of consecutive missed
2736          * beacon, or any other uCode error condition detected.
2737          */
2738         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2739         iwl_internal_short_hw_scan(priv);
2740 }
2741
2742
2743 int iwl_force_reset(struct iwl_priv *priv, int mode)
2744 {
2745         struct iwl_force_reset *force_reset;
2746
2747         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2748                 return -EINVAL;
2749
2750         if (mode >= IWL_MAX_FORCE_RESET) {
2751                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2752                 return -EINVAL;
2753         }
2754         force_reset = &priv->force_reset[mode];
2755         force_reset->reset_request_count++;
2756         if (force_reset->last_force_reset_jiffies &&
2757             time_after(force_reset->last_force_reset_jiffies +
2758             force_reset->reset_duration, jiffies)) {
2759                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2760                 force_reset->reset_reject_count++;
2761                 return -EAGAIN;
2762         }
2763         force_reset->reset_success_count++;
2764         force_reset->last_force_reset_jiffies = jiffies;
2765         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2766         switch (mode) {
2767         case IWL_RF_RESET:
2768                 iwl_force_rf_reset(priv);
2769                 break;
2770         case IWL_FW_RESET:
2771                 IWL_ERR(priv, "On demand firmware reload\n");
2772                 /* Set the FW error flag -- cleared on iwl_down */
2773                 set_bit(STATUS_FW_ERROR, &priv->status);
2774                 wake_up_interruptible(&priv->wait_command_queue);
2775                 /*
2776                  * Keep the restart process from trying to send host
2777                  * commands by clearing the INIT status bit
2778                  */
2779                 clear_bit(STATUS_READY, &priv->status);
2780                 queue_work(priv->workqueue, &priv->restart);
2781                 break;
2782         }
2783         return 0;
2784 }
2785 EXPORT_SYMBOL(iwl_force_reset);
2786
2787 /**
2788  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2789  *
2790  * During normal condition (no queue is stuck), the timer is continually set to
2791  * execute every monitor_recover_period milliseconds after the last timer
2792  * expired.  When the queue read_ptr is at the same place, the timer is
2793  * shorten to 100mSecs.  This is
2794  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2795  *      2) to detect the stuck queues quicker before the station and AP can
2796  *      disassociate each other.
2797  *
2798  * This function monitors all the tx queues and recover from it if any
2799  * of the queues are stuck.
2800  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2801  *      it will recover by resetting the firmware and return.
2802  * 2. Then, it checks for station association.  If it associates it will check
2803  *      other queues.  If any queue is stuck, it will recover by resetting
2804  *      the firmware.
2805  * Note: It the number of times the queue read_ptr to be at the same place to
2806  *      be MAX_REPEAT+1 in order to consider to be stuck.
2807  */
2808 /*
2809  * The maximum number of times the read pointer of the tx queue at the
2810  * same place without considering to be stuck.
2811  */
2812 #define MAX_REPEAT      (2)
2813 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2814 {
2815         struct iwl_tx_queue *txq;
2816         struct iwl_queue *q;
2817
2818         txq = &priv->txq[cnt];
2819         q = &txq->q;
2820         /* queue is empty, skip */
2821         if (q->read_ptr != q->write_ptr) {
2822                 if (q->read_ptr == q->last_read_ptr) {
2823                         /* a queue has not been read from last time */
2824                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2825                                 IWL_ERR(priv,
2826                                         "queue %d stuck %d time. Fw reload.\n",
2827                                         q->id, q->repeat_same_read_ptr);
2828                                 q->repeat_same_read_ptr = 0;
2829                                 iwl_force_reset(priv, IWL_FW_RESET);
2830                         } else {
2831                                 q->repeat_same_read_ptr++;
2832                                 IWL_DEBUG_RADIO(priv,
2833                                                 "queue %d, not read %d time\n",
2834                                                 q->id,
2835                                                 q->repeat_same_read_ptr);
2836                                 mod_timer(&priv->monitor_recover, jiffies +
2837                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2838                         }
2839                         return 1;
2840                 } else {
2841                         q->last_read_ptr = q->read_ptr;
2842                         q->repeat_same_read_ptr = 0;
2843                 }
2844         }
2845         return 0;
2846 }
2847
2848 void iwl_bg_monitor_recover(unsigned long data)
2849 {
2850         struct iwl_priv *priv = (struct iwl_priv *)data;
2851         int cnt;
2852
2853         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2854                 return;
2855
2856         /* monitor and check for stuck cmd queue */
2857         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2858                 return;
2859
2860         /* monitor and check for other stuck queues */
2861         if (iwl_is_associated(priv)) {
2862                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2863                         /* skip as we already checked the command queue */
2864                         if (cnt == IWL_CMD_QUEUE_NUM)
2865                                 continue;
2866                         if (iwl_check_stuck_queue(priv, cnt))
2867                                 return;
2868                 }
2869         }
2870         /*
2871          * Reschedule the timer to occur in
2872          * priv->cfg->monitor_recover_period
2873          */
2874         mod_timer(&priv->monitor_recover,
2875                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2876 }
2877 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2878
2879 #ifdef CONFIG_PM
2880
2881 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2882 {
2883         struct iwl_priv *priv = pci_get_drvdata(pdev);
2884
2885         /*
2886          * This function is called when system goes into suspend state
2887          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2888          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2889          * it will not call apm_ops.stop() to stop the DMA operation.
2890          * Calling apm_ops.stop here to make sure we stop the DMA.
2891          */
2892         priv->cfg->ops->lib->apm_ops.stop(priv);
2893
2894         pci_save_state(pdev);
2895         pci_disable_device(pdev);
2896         pci_set_power_state(pdev, PCI_D3hot);
2897
2898         return 0;
2899 }
2900 EXPORT_SYMBOL(iwl_pci_suspend);
2901
2902 int iwl_pci_resume(struct pci_dev *pdev)
2903 {
2904         struct iwl_priv *priv = pci_get_drvdata(pdev);
2905         int ret;
2906
2907         /*
2908          * We disable the RETRY_TIMEOUT register (0x41) to keep
2909          * PCI Tx retries from interfering with C3 CPU state.
2910          */
2911         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2912
2913         pci_set_power_state(pdev, PCI_D0);
2914         ret = pci_enable_device(pdev);
2915         if (ret)
2916                 return ret;
2917         pci_restore_state(pdev);
2918         iwl_enable_interrupts(priv);
2919
2920         return 0;
2921 }
2922 EXPORT_SYMBOL(iwl_pci_resume);
2923
2924 #endif /* CONFIG_PM */