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_DEBUGFS
 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 /**
 858  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 859  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 860  * @channel: Any channel valid for the requested phymode
 861
 862  * In addition to setting the staging RXON, priv->phymode is also set.
 863  *
 864  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 865  * in the staging RXON flag structure based on the phymode
 866  */
 867 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 868 {
 869         enum ieee80211_band band = ch->band;
 870         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 871
 872         if (!iwl_get_channel_info(priv, band, channel)) {
 873                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 874                                channel, band);
 875                 return -EINVAL;
 876         }
 877
 878         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 879             (priv->band == band))
 880                 return 0;
 881
 882         priv->staging_rxon.channel = cpu_to_le16(channel);
 883         if (band == IEEE80211_BAND_5GHZ)
 884                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 885         else
 886                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 887
 888         priv->band = band;
 889
 890         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 891
 892         return 0;
 893 }
 894 EXPORT_SYMBOL(iwl_set_rxon_channel);
 895
 896 static void iwl_set_flags_for_band(struct iwl_priv *priv,
 897                                    enum ieee80211_band band,
 898                                    struct ieee80211_vif *vif)
 899 {
 900         if (band == IEEE80211_BAND_5GHZ) {
 901                 priv->staging_rxon.flags &=
 902                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 903                       | RXON_FLG_CCK_MSK);
 904                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 905         } else {
 906                 /* Copied from iwl_post_associate() */
 907                 if (vif && vif->bss_conf.use_short_slot)
 908                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 909                 else
 910                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 911
 912                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 913                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 914                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 915         }
 916 }
 917
 918 /*
 919  * initialize rxon structure with default values from eeprom
 920  */
 921 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 922                                    struct ieee80211_vif *vif)
 923 {
 924         const struct iwl_channel_info *ch_info;
 925         enum nl80211_iftype type = NL80211_IFTYPE_STATION;
 926
 927         if (vif)
 928                 type = vif->type;
 929
 930         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 931
 932         switch (type) {
 933         case NL80211_IFTYPE_AP:
 934                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 935                 break;
 936
 937         case NL80211_IFTYPE_STATION:
 938                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 939                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 940                 break;
 941
 942         case NL80211_IFTYPE_ADHOC:
 943                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 944                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 945                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 946                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 947                 break;
 948
 949         default:
 950                 IWL_ERR(priv, "Unsupported interface type %d\n", type);
 951                 break;
 952         }
 953
 954 #if 0
 955         /* TODO:  Figure out when short_preamble would be set and cache from
 956          * that */
 957         if (!hw_to_local(priv->hw)->short_preamble)
 958                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 959         else
 960                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 961 #endif
 962
 963         ch_info = iwl_get_channel_info(priv, priv->band,
 964                                        le16_to_cpu(priv->active_rxon.channel));
 965
 966         if (!ch_info)
 967                 ch_info = &priv->channel_info[0];
 968
 969         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 970         priv->band = ch_info->band;
 971
 972         iwl_set_flags_for_band(priv, priv->band, vif);
 973
 974         priv->staging_rxon.ofdm_basic_rates =
 975             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 976         priv->staging_rxon.cck_basic_rates =
 977             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 978
 979         /* clear both MIX and PURE40 mode flag */
 980         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 981                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 982         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 983         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 984         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 985         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
 986 }
 987 EXPORT_SYMBOL(iwl_connection_init_rx_config);
 988
 989 static void iwl_set_rate(struct iwl_priv *priv)
 990 {
 991         const struct ieee80211_supported_band *hw = NULL;
 992         struct ieee80211_rate *rate;
 993         int i;
 994
 995         hw = iwl_get_hw_mode(priv, priv->band);
 996         if (!hw) {
 997                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 998                 return;
 999         }
1000
1001         priv->active_rate = 0;
1002
1003         for (i = 0; i < hw->n_bitrates; i++) {
1004                 rate = &(hw->bitrates[i]);
1005                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1006                         priv->active_rate |= (1 << rate->hw_value);
1007         }
1008
1009         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1010
1011         priv->staging_rxon.cck_basic_rates =
1012             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1013
1014         priv->staging_rxon.ofdm_basic_rates =
1015            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1016 }
1017
1018 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1019 {
1020         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1021         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1022         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1023
1024         if (priv->switch_rxon.switch_in_progress) {
1025                 if (!le32_to_cpu(csa->status) &&
1026                     (csa->channel == priv->switch_rxon.channel)) {
1027                         rxon->channel = csa->channel;
1028                         priv->staging_rxon.channel = csa->channel;
1029                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1030                               le16_to_cpu(csa->channel));
1031                 } else
1032                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1033                               le16_to_cpu(csa->channel));
1034
1035                 priv->switch_rxon.switch_in_progress = false;
1036         }
1037 }
1038 EXPORT_SYMBOL(iwl_rx_csa);
1039
1040 #ifdef CONFIG_IWLWIFI_DEBUG
1041 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1042 {
1043         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1044
1045         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1046         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1047         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1048         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1049         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1050                         le32_to_cpu(rxon->filter_flags));
1051         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1052         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1053                         rxon->ofdm_basic_rates);
1054         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1055         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1056         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1057         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1058 }
1059 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1060 #endif
1061 /**
1062  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1063  */
1064 void iwl_irq_handle_error(struct iwl_priv *priv)
1065 {
1066         /* Set the FW error flag -- cleared on iwl_down */
1067         set_bit(STATUS_FW_ERROR, &priv->status);
1068
1069         /* Cancel currently queued command. */
1070         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1071
1072         IWL_ERR(priv, "Loaded firmware version: %s\n",
1073                 priv->hw->wiphy->fw_version);
1074
1075         priv->cfg->ops->lib->dump_nic_error_log(priv);
1076         if (priv->cfg->ops->lib->dump_csr)
1077                 priv->cfg->ops->lib->dump_csr(priv);
1078         if (priv->cfg->ops->lib->dump_fh)
1079                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1080         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1081 #ifdef CONFIG_IWLWIFI_DEBUG
1082         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1083                 iwl_print_rx_config_cmd(priv);
1084 #endif
1085
1086         wake_up_interruptible(&priv->wait_command_queue);
1087
1088         /* Keep the restart process from trying to send host
1089          * commands by clearing the INIT status bit */
1090         clear_bit(STATUS_READY, &priv->status);
1091
1092         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1093                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1094                           "Restarting adapter due to uCode error.\n");
1095
1096                 if (priv->cfg->mod_params->restart_fw)
1097                         queue_work(priv->workqueue, &priv->restart);
1098         }
1099 }
1100 EXPORT_SYMBOL(iwl_irq_handle_error);
1101
1102 static int iwl_apm_stop_master(struct iwl_priv *priv)
1103 {
1104         int ret = 0;
1105
1106         /* stop device's busmaster DMA activity */
1107         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1108
1109         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1110                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1111         if (ret)
1112                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1113
1114         IWL_DEBUG_INFO(priv, "stop master\n");
1115
1116         return ret;
1117 }
1118
1119 void iwl_apm_stop(struct iwl_priv *priv)
1120 {
1121         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1122
1123         /* Stop device's DMA activity */
1124         iwl_apm_stop_master(priv);
1125
1126         /* Reset the entire device */
1127         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1128
1129         udelay(10);
1130
1131         /*
1132          * Clear "initialization complete" bit to move adapter from
1133          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1134          */
1135         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1136 }
1137 EXPORT_SYMBOL(iwl_apm_stop);
1138
1139
1140 /*
1141  * Start up NIC's basic functionality after it has been reset
1142  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1143  * NOTE:  This does not load uCode nor start the embedded processor
1144  */
1145 int iwl_apm_init(struct iwl_priv *priv)
1146 {
1147         int ret = 0;
1148         u16 lctl;
1149
1150         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1151
1152         /*
1153          * Use "set_bit" below rather than "write", to preserve any hardware
1154          * bits already set by default after reset.
1155          */
1156
1157         /* Disable L0S exit timer (platform NMI Work/Around) */
1158         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1159                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1160
1161         /*
1162          * Disable L0s without affecting L1;
1163          *  don't wait for ICH L0s (ICH bug W/A)
1164          */
1165         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1166                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1167
1168         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1169         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1170
1171         /*
1172          * Enable HAP INTA (interrupt from management bus) to
1173          * wake device's PCI Express link L1a -> L0s
1174          * NOTE:  This is no-op for 3945 (non-existant bit)
1175          */
1176         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1177                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1178
1179         /*
1180          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1181          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1182          * If so (likely), disable L0S, so device moves directly L0->L1;
1183          *    costs negligible amount of power savings.
1184          * If not (unlikely), enable L0S, so there is at least some
1185          *    power savings, even without L1.
1186          */
1187         if (priv->cfg->set_l0s) {
1188                 lctl = iwl_pcie_link_ctl(priv);
1189                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1190                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1191                         /* L1-ASPM enabled; disable(!) L0S  */
1192                         iwl_set_bit(priv, CSR_GIO_REG,
1193                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1194                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1195                 } else {
1196                         /* L1-ASPM disabled; enable(!) L0S */
1197                         iwl_clear_bit(priv, CSR_GIO_REG,
1198                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1199                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1200                 }
1201         }
1202
1203         /* Configure analog phase-lock-loop before activating to D0A */
1204         if (priv->cfg->pll_cfg_val)
1205                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1206
1207         /*
1208          * Set "initialization complete" bit to move adapter from
1209          * D0U* --> D0A* (powered-up active) state.
1210          */
1211         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1212
1213         /*
1214          * Wait for clock stabilization; once stabilized, access to
1215          * device-internal resources is supported, e.g. iwl_write_prph()
1216          * and accesses to uCode SRAM.
1217          */
1218         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1219                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1220                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1221         if (ret < 0) {
1222                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1223                 goto out;
1224         }
1225
1226         /*
1227          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1228          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1229          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1230          * and don't need BSM to restore data after power-saving sleep.
1231          *
1232          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1233          * do not disable clocks.  This preserves any hardware bits already
1234          * set by default in "CLK_CTRL_REG" after reset.
1235          */
1236         if (priv->cfg->use_bsm)
1237                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1238                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1239         else
1240                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1241                         APMG_CLK_VAL_DMA_CLK_RQT);
1242         udelay(20);
1243
1244         /* Disable L1-Active */
1245         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1246                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1247
1248 out:
1249         return ret;
1250 }
1251 EXPORT_SYMBOL(iwl_apm_init);
1252
1253
1254
1255 void iwl_configure_filter(struct ieee80211_hw *hw,
1256                           unsigned int changed_flags,
1257                           unsigned int *total_flags,
1258                           u64 multicast)
1259 {
1260         struct iwl_priv *priv = hw->priv;
1261         __le32 filter_or = 0, filter_nand = 0;
1262
1263 #define CHK(test, flag) do { \
1264         if (*total_flags & (test))              \
1265                 filter_or |= (flag);            \
1266         else                                    \
1267                 filter_nand |= (flag);          \
1268         } while (0)
1269
1270         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1271                         changed_flags, *total_flags);
1272
1273         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1274         CHK(FIF_ALLMULTI, RXON_FILTER_ACCEPT_GRP_MSK);
1275         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1276         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1277
1278 #undef CHK
1279
1280         mutex_lock(&priv->mutex);
1281
1282         priv->staging_rxon.filter_flags &= ~filter_nand;
1283         priv->staging_rxon.filter_flags |= filter_or;
1284
1285         iwlcore_commit_rxon(priv);
1286
1287         mutex_unlock(&priv->mutex);
1288
1289         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1290                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1291 }
1292 EXPORT_SYMBOL(iwl_configure_filter);
1293
1294 int iwl_set_hw_params(struct iwl_priv *priv)
1295 {
1296         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1297         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1298         if (priv->cfg->mod_params->amsdu_size_8K)
1299                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1300         else
1301                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1302
1303         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1304
1305         if (priv->cfg->mod_params->disable_11n)
1306                 priv->cfg->sku &= ~IWL_SKU_N;
1307
1308         /* Device-specific setup */
1309         return priv->cfg->ops->lib->set_hw_params(priv);
1310 }
1311 EXPORT_SYMBOL(iwl_set_hw_params);
1312
1313 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1314 {
1315         int ret = 0;
1316         s8 prev_tx_power = priv->tx_power_user_lmt;
1317
1318         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1319                 IWL_WARN(priv,
1320                          "Requested user TXPOWER %d below lower limit %d.\n",
1321                          tx_power,
1322                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1323                 return -EINVAL;
1324         }
1325
1326         if (tx_power > priv->tx_power_device_lmt) {
1327                 IWL_WARN(priv,
1328                         "Requested user TXPOWER %d above upper limit %d.\n",
1329                          tx_power, priv->tx_power_device_lmt);
1330                 return -EINVAL;
1331         }
1332
1333         if (priv->tx_power_user_lmt != tx_power)
1334                 force = true;
1335
1336         /* if nic is not up don't send command */
1337         if (iwl_is_ready_rf(priv)) {
1338                 priv->tx_power_user_lmt = tx_power;
1339                 if (force && priv->cfg->ops->lib->send_tx_power)
1340                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1341                 else if (!priv->cfg->ops->lib->send_tx_power)
1342                         ret = -EOPNOTSUPP;
1343                 /*
1344                  * if fail to set tx_power, restore the orig. tx power
1345                  */
1346                 if (ret)
1347                         priv->tx_power_user_lmt = prev_tx_power;
1348         }
1349
1350         /*
1351          * Even this is an async host command, the command
1352          * will always report success from uCode
1353          * So once driver can placing the command into the queue
1354          * successfully, driver can use priv->tx_power_user_lmt
1355          * to reflect the current tx power
1356          */
1357         return ret;
1358 }
1359 EXPORT_SYMBOL(iwl_set_tx_power);
1360
1361 irqreturn_t iwl_isr_legacy(int irq, void *data)
1362 {
1363         struct iwl_priv *priv = data;
1364         u32 inta, inta_mask;
1365         u32 inta_fh;
1366         unsigned long flags;
1367         if (!priv)
1368                 return IRQ_NONE;
1369
1370         spin_lock_irqsave(&priv->lock, flags);
1371
1372         /* Disable (but don't clear!) interrupts here to avoid
1373          *    back-to-back ISRs and sporadic interrupts from our NIC.
1374          * If we have something to service, the tasklet will re-enable ints.
1375          * If we *don't* have something, we'll re-enable before leaving here. */
1376         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1377         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1378
1379         /* Discover which interrupts are active/pending */
1380         inta = iwl_read32(priv, CSR_INT);
1381         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1382
1383         /* Ignore interrupt if there's nothing in NIC to service.
1384          * This may be due to IRQ shared with another device,
1385          * or due to sporadic interrupts thrown from our NIC. */
1386         if (!inta && !inta_fh) {
1387                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1388                 goto none;
1389         }
1390
1391         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1392                 /* Hardware disappeared. It might have already raised
1393                  * an interrupt */
1394                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1395                 goto unplugged;
1396         }
1397
1398         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1399                       inta, inta_mask, inta_fh);
1400
1401         inta &= ~CSR_INT_BIT_SCD;
1402
1403         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1404         if (likely(inta || inta_fh))
1405                 tasklet_schedule(&priv->irq_tasklet);
1406
1407  unplugged:
1408         spin_unlock_irqrestore(&priv->lock, flags);
1409         return IRQ_HANDLED;
1410
1411  none:
1412         /* re-enable interrupts here since we don't have anything to service. */
1413         /* only Re-enable if diabled by irq */
1414         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1415                 iwl_enable_interrupts(priv);
1416         spin_unlock_irqrestore(&priv->lock, flags);
1417         return IRQ_NONE;
1418 }
1419 EXPORT_SYMBOL(iwl_isr_legacy);
1420
1421 void iwl_send_bt_config(struct iwl_priv *priv)
1422 {
1423         struct iwl_bt_cmd bt_cmd = {
1424                 .lead_time = BT_LEAD_TIME_DEF,
1425                 .max_kill = BT_MAX_KILL_DEF,
1426                 .kill_ack_mask = 0,
1427                 .kill_cts_mask = 0,
1428         };
1429
1430         if (!bt_coex_active)
1431                 bt_cmd.flags = BT_COEX_DISABLE;
1432         else
1433                 bt_cmd.flags = BT_COEX_ENABLE;
1434
1435         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1436                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1437
1438         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1439                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1440                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1441 }
1442 EXPORT_SYMBOL(iwl_send_bt_config);
1443
1444 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1445 {
1446         struct iwl_statistics_cmd statistics_cmd = {
1447                 .configuration_flags =
1448                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1449         };
1450
1451         if (flags & CMD_ASYNC)
1452                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1453                                                sizeof(struct iwl_statistics_cmd),
1454                                                &statistics_cmd, NULL);
1455         else
1456                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1457                                         sizeof(struct iwl_statistics_cmd),
1458                                         &statistics_cmd);
1459 }
1460 EXPORT_SYMBOL(iwl_send_statistics_request);
1461
1462 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1463 {
1464         struct iwl_ct_kill_config cmd;
1465         struct iwl_ct_kill_throttling_config adv_cmd;
1466         unsigned long flags;
1467         int ret = 0;
1468
1469         spin_lock_irqsave(&priv->lock, flags);
1470         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1471                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1472         spin_unlock_irqrestore(&priv->lock, flags);
1473         priv->thermal_throttle.ct_kill_toggle = false;
1474
1475         if (priv->cfg->support_ct_kill_exit) {
1476                 adv_cmd.critical_temperature_enter =
1477                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1478                 adv_cmd.critical_temperature_exit =
1479                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1480
1481                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1482                                        sizeof(adv_cmd), &adv_cmd);
1483                 if (ret)
1484                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1485                 else
1486                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1487                                         "succeeded, "
1488                                         "critical temperature enter is %d,"
1489                                         "exit is %d\n",
1490                                        priv->hw_params.ct_kill_threshold,
1491                                        priv->hw_params.ct_kill_exit_threshold);
1492         } else {
1493                 cmd.critical_temperature_R =
1494                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1495
1496                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1497                                        sizeof(cmd), &cmd);
1498                 if (ret)
1499                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1500                 else
1501                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1502                                         "succeeded, "
1503                                         "critical temperature is %d\n",
1504                                         priv->hw_params.ct_kill_threshold);
1505         }
1506 }
1507 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1508
1509
1510 /*
1511  * CARD_STATE_CMD
1512  *
1513  * Use: Sets the device's internal card state to enable, disable, or halt
1514  *
1515  * When in the 'enable' state the card operates as normal.
1516  * When in the 'disable' state, the card enters into a low power mode.
1517  * When in the 'halt' state, the card is shut down and must be fully
1518  * restarted to come back on.
1519  */
1520 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1521 {
1522         struct iwl_host_cmd cmd = {
1523                 .id = REPLY_CARD_STATE_CMD,
1524                 .len = sizeof(u32),
1525                 .data = &flags,
1526                 .flags = meta_flag,
1527         };
1528
1529         return iwl_send_cmd(priv, &cmd);
1530 }
1531
1532 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1533                            struct iwl_rx_mem_buffer *rxb)
1534 {
1535 #ifdef CONFIG_IWLWIFI_DEBUG
1536         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1537         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1538         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1539                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1540 #endif
1541 }
1542 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1543
1544 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1545                                       struct iwl_rx_mem_buffer *rxb)
1546 {
1547         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1548         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1549         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1550                         "notification for %s:\n", len,
1551                         get_cmd_string(pkt->hdr.cmd));
1552         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1553 }
1554 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1555
1556 void iwl_rx_reply_error(struct iwl_priv *priv,
1557                         struct iwl_rx_mem_buffer *rxb)
1558 {
1559         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1560
1561         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1562                 "seq 0x%04X ser 0x%08X\n",
1563                 le32_to_cpu(pkt->u.err_resp.error_type),
1564                 get_cmd_string(pkt->u.err_resp.cmd_id),
1565                 pkt->u.err_resp.cmd_id,
1566                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1567                 le32_to_cpu(pkt->u.err_resp.error_info));
1568 }
1569 EXPORT_SYMBOL(iwl_rx_reply_error);
1570
1571 void iwl_clear_isr_stats(struct iwl_priv *priv)
1572 {
1573         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1574 }
1575
1576 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1577                            const struct ieee80211_tx_queue_params *params)
1578 {
1579         struct iwl_priv *priv = hw->priv;
1580         unsigned long flags;
1581         int q;
1582
1583         IWL_DEBUG_MAC80211(priv, "enter\n");
1584
1585         if (!iwl_is_ready_rf(priv)) {
1586                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1587                 return -EIO;
1588         }
1589
1590         if (queue >= AC_NUM) {
1591                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1592                 return 0;
1593         }
1594
1595         q = AC_NUM - 1 - queue;
1596
1597         spin_lock_irqsave(&priv->lock, flags);
1598
1599         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1600         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1601         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1602         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1603                         cpu_to_le16((params->txop * 32));
1604
1605         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1606
1607         spin_unlock_irqrestore(&priv->lock, flags);
1608
1609         IWL_DEBUG_MAC80211(priv, "leave\n");
1610         return 0;
1611 }
1612 EXPORT_SYMBOL(iwl_mac_conf_tx);
1613
1614 static void iwl_ht_conf(struct iwl_priv *priv,
1615                         struct ieee80211_vif *vif)
1616 {
1617         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1618         struct ieee80211_sta *sta;
1619         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1620
1621         IWL_DEBUG_MAC80211(priv, "enter:\n");
1622
1623         if (!ht_conf->is_ht)
1624                 return;
1625
1626         ht_conf->ht_protection =
1627                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1628         ht_conf->non_GF_STA_present =
1629                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1630
1631         ht_conf->single_chain_sufficient = false;
1632
1633         switch (vif->type) {
1634         case NL80211_IFTYPE_STATION:
1635                 rcu_read_lock();
1636                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1637                 if (sta) {
1638                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1639                         int maxstreams;
1640
1641                         maxstreams = (ht_cap->mcs.tx_params &
1642                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1643                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1644                         maxstreams += 1;
1645
1646                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1647                             (ht_cap->mcs.rx_mask[2] == 0))
1648                                 ht_conf->single_chain_sufficient = true;
1649                         if (maxstreams <= 1)
1650                                 ht_conf->single_chain_sufficient = true;
1651                 } else {
1652                         /*
1653                          * If at all, this can only happen through a race
1654                          * when the AP disconnects us while we're still
1655                          * setting up the connection, in that case mac80211
1656                          * will soon tell us about that.
1657                          */
1658                         ht_conf->single_chain_sufficient = true;
1659                 }
1660                 rcu_read_unlock();
1661                 break;
1662         case NL80211_IFTYPE_ADHOC:
1663                 ht_conf->single_chain_sufficient = true;
1664                 break;
1665         default:
1666                 break;
1667         }
1668
1669         IWL_DEBUG_MAC80211(priv, "leave\n");
1670 }
1671
1672 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1673 {
1674         iwl_led_disassociate(priv);
1675         /*
1676          * inform the ucode that there is no longer an
1677          * association and that no more packets should be
1678          * sent
1679          */
1680         priv->staging_rxon.filter_flags &=
1681                 ~RXON_FILTER_ASSOC_MSK;
1682         priv->staging_rxon.assoc_id = 0;
1683         iwlcore_commit_rxon(priv);
1684 }
1685
1686 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1687                           struct ieee80211_vif *vif,
1688                           struct ieee80211_bss_conf *bss_conf,
1689                           u32 changes)
1690 {
1691         struct iwl_priv *priv = hw->priv;
1692         int ret;
1693
1694         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1695
1696         if (!iwl_is_alive(priv))
1697                 return;
1698
1699         mutex_lock(&priv->mutex);
1700
1701         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1702                 dev_kfree_skb(priv->ibss_beacon);
1703                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1704         }
1705
1706         if (changes & BSS_CHANGED_BEACON_INT) {
1707                 /* TODO: in AP mode, do something to make this take effect */
1708         }
1709
1710         if (changes & BSS_CHANGED_BSSID) {
1711                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1712
1713                 /*
1714                  * If there is currently a HW scan going on in the
1715                  * background then we need to cancel it else the RXON
1716                  * below/in post_associate will fail.
1717                  */
1718                 if (iwl_scan_cancel_timeout(priv, 100)) {
1719                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1720                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1721                         mutex_unlock(&priv->mutex);
1722                         return;
1723                 }
1724
1725                 /* mac80211 only sets assoc when in STATION mode */
1726                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1727                         memcpy(priv->staging_rxon.bssid_addr,
1728                                bss_conf->bssid, ETH_ALEN);
1729
1730                         /* currently needed in a few places */
1731                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1732                 } else {
1733                         priv->staging_rxon.filter_flags &=
1734                                 ~RXON_FILTER_ASSOC_MSK;
1735                 }
1736
1737         }
1738
1739         /*
1740          * This needs to be after setting the BSSID in case
1741          * mac80211 decides to do both changes at once because
1742          * it will invoke post_associate.
1743          */
1744         if (vif->type == NL80211_IFTYPE_ADHOC &&
1745             changes & BSS_CHANGED_BEACON) {
1746                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1747
1748                 if (beacon)
1749                         iwl_mac_beacon_update(hw, beacon);
1750         }
1751
1752         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1753                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1754                                    bss_conf->use_short_preamble);
1755                 if (bss_conf->use_short_preamble)
1756                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1757                 else
1758                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1759         }
1760
1761         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1762                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1763                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1764                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1765                 else
1766                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1767         }
1768
1769         if (changes & BSS_CHANGED_BASIC_RATES) {
1770                 /* XXX use this information
1771                  *
1772                  * To do that, remove code from iwl_set_rate() and put something
1773                  * like this here:
1774                  *
1775                 if (A-band)
1776                         priv->staging_rxon.ofdm_basic_rates =
1777                                 bss_conf->basic_rates;
1778                 else
1779                         priv->staging_rxon.ofdm_basic_rates =
1780                                 bss_conf->basic_rates >> 4;
1781                         priv->staging_rxon.cck_basic_rates =
1782                                 bss_conf->basic_rates & 0xF;
1783                  */
1784         }
1785
1786         if (changes & BSS_CHANGED_HT) {
1787                 iwl_ht_conf(priv, vif);
1788
1789                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1790                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1791         }
1792
1793         if (changes & BSS_CHANGED_ASSOC) {
1794                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1795                 if (bss_conf->assoc) {
1796                         priv->timestamp = bss_conf->timestamp;
1797
1798                         iwl_led_associate(priv);
1799
1800                         if (!iwl_is_rfkill(priv))
1801                                 priv->cfg->ops->lib->post_associate(priv, vif);
1802                 } else
1803                         iwl_set_no_assoc(priv);
1804         }
1805
1806         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1807                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1808                                    changes);
1809                 ret = iwl_send_rxon_assoc(priv);
1810                 if (!ret) {
1811                         /* Sync active_rxon with latest change. */
1812                         memcpy((void *)&priv->active_rxon,
1813                                 &priv->staging_rxon,
1814                                 sizeof(struct iwl_rxon_cmd));
1815                 }
1816         }
1817
1818         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1819                 if (vif->bss_conf.enable_beacon) {
1820                         memcpy(priv->staging_rxon.bssid_addr,
1821                                bss_conf->bssid, ETH_ALEN);
1822                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1823                         iwlcore_config_ap(priv, vif);
1824                 } else
1825                         iwl_set_no_assoc(priv);
1826         }
1827
1828         if (changes & BSS_CHANGED_IBSS) {
1829                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1830                                                         bss_conf->ibss_joined);
1831                 if (ret)
1832                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1833                                 bss_conf->ibss_joined ? "add" : "remove",
1834                                 bss_conf->bssid);
1835         }
1836
1837         mutex_unlock(&priv->mutex);
1838
1839         IWL_DEBUG_MAC80211(priv, "leave\n");
1840 }
1841 EXPORT_SYMBOL(iwl_bss_info_changed);
1842
1843 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1844 {
1845         struct iwl_priv *priv = hw->priv;
1846         unsigned long flags;
1847         __le64 timestamp;
1848
1849         IWL_DEBUG_MAC80211(priv, "enter\n");
1850
1851         if (!iwl_is_ready_rf(priv)) {
1852                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1853                 return -EIO;
1854         }
1855
1856         spin_lock_irqsave(&priv->lock, flags);
1857
1858         if (priv->ibss_beacon)
1859                 dev_kfree_skb(priv->ibss_beacon);
1860
1861         priv->ibss_beacon = skb;
1862
1863         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1864         priv->timestamp = le64_to_cpu(timestamp);
1865
1866         IWL_DEBUG_MAC80211(priv, "leave\n");
1867         spin_unlock_irqrestore(&priv->lock, flags);
1868
1869         priv->cfg->ops->lib->post_associate(priv, priv->vif);
1870
1871         return 0;
1872 }
1873 EXPORT_SYMBOL(iwl_mac_beacon_update);
1874
1875 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1876 {
1877         iwl_connection_init_rx_config(priv, vif);
1878
1879         if (priv->cfg->ops->hcmd->set_rxon_chain)
1880                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1881
1882         return iwlcore_commit_rxon(priv);
1883 }
1884
1885 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1886 {
1887         struct iwl_priv *priv = hw->priv;
1888         int err = 0;
1889
1890         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
1891
1892         mutex_lock(&priv->mutex);
1893
1894         if (WARN_ON(!iwl_is_ready_rf(priv))) {
1895                 err = -EINVAL;
1896                 goto out;
1897         }
1898
1899         if (priv->vif) {
1900                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
1901                 err = -EOPNOTSUPP;
1902                 goto out;
1903         }
1904
1905         priv->vif = vif;
1906         priv->iw_mode = vif->type;
1907
1908         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
1909         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
1910
1911         err = iwl_set_mode(priv, vif);
1912         if (err)
1913                 goto out_err;
1914
1915         goto out;
1916
1917  out_err:
1918         priv->vif = NULL;
1919         priv->iw_mode = NL80211_IFTYPE_STATION;
1920  out:
1921         mutex_unlock(&priv->mutex);
1922
1923         IWL_DEBUG_MAC80211(priv, "leave\n");
1924         return err;
1925 }
1926 EXPORT_SYMBOL(iwl_mac_add_interface);
1927
1928 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1929                               struct ieee80211_vif *vif)
1930 {
1931         struct iwl_priv *priv = hw->priv;
1932
1933         IWL_DEBUG_MAC80211(priv, "enter\n");
1934
1935         mutex_lock(&priv->mutex);
1936
1937         if (iwl_is_ready_rf(priv)) {
1938                 iwl_scan_cancel_timeout(priv, 100);
1939                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1940                 iwlcore_commit_rxon(priv);
1941         }
1942         if (priv->vif == vif) {
1943                 priv->vif = NULL;
1944                 memset(priv->bssid, 0, ETH_ALEN);
1945         }
1946         mutex_unlock(&priv->mutex);
1947
1948         IWL_DEBUG_MAC80211(priv, "leave\n");
1949
1950 }
1951 EXPORT_SYMBOL(iwl_mac_remove_interface);
1952
1953 /**
1954  * iwl_mac_config - mac80211 config callback
1955  */
1956 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
1957 {
1958         struct iwl_priv *priv = hw->priv;
1959         const struct iwl_channel_info *ch_info;
1960         struct ieee80211_conf *conf = &hw->conf;
1961         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1962         unsigned long flags = 0;
1963         int ret = 0;
1964         u16 ch;
1965         int scan_active = 0;
1966
1967         mutex_lock(&priv->mutex);
1968
1969         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
1970                                         conf->channel->hw_value, changed);
1971
1972         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
1973                         test_bit(STATUS_SCANNING, &priv->status))) {
1974                 scan_active = 1;
1975                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1976         }
1977
1978         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1979                        IEEE80211_CONF_CHANGE_CHANNEL)) {
1980                 /* mac80211 uses static for non-HT which is what we want */
1981                 priv->current_ht_config.smps = conf->smps_mode;
1982
1983                 /*
1984                  * Recalculate chain counts.
1985                  *
1986                  * If monitor mode is enabled then mac80211 will
1987                  * set up the SM PS mode to OFF if an HT channel is
1988                  * configured.
1989                  */
1990                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1991                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1992         }
1993
1994         /* during scanning mac80211 will delay channel setting until
1995          * scan finish with changed = 0
1996          */
1997         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1998                 if (scan_active)
1999                         goto set_ch_out;
2000
2001                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2002                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2003                 if (!is_channel_valid(ch_info)) {
2004                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2005                         ret = -EINVAL;
2006                         goto set_ch_out;
2007                 }
2008
2009                 spin_lock_irqsave(&priv->lock, flags);
2010
2011                 /* Configure HT40 channels */
2012                 ht_conf->is_ht = conf_is_ht(conf);
2013                 if (ht_conf->is_ht) {
2014                         if (conf_is_ht40_minus(conf)) {
2015                                 ht_conf->extension_chan_offset =
2016                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2017                                 ht_conf->is_40mhz = true;
2018                         } else if (conf_is_ht40_plus(conf)) {
2019                                 ht_conf->extension_chan_offset =
2020                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2021                                 ht_conf->is_40mhz = true;
2022                         } else {
2023                                 ht_conf->extension_chan_offset =
2024                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2025                                 ht_conf->is_40mhz = false;
2026                         }
2027                 } else
2028                         ht_conf->is_40mhz = false;
2029                 /* Default to no protection. Protection mode will later be set
2030                  * from BSS config in iwl_ht_conf */
2031                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2032
2033                 /* if we are switching from ht to 2.4 clear flags
2034                  * from any ht related info since 2.4 does not
2035                  * support ht */
2036                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2037                         priv->staging_rxon.flags = 0;
2038
2039                 iwl_set_rxon_channel(priv, conf->channel);
2040                 iwl_set_rxon_ht(priv, ht_conf);
2041
2042                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2043                 spin_unlock_irqrestore(&priv->lock, flags);
2044                 if (iwl_is_associated(priv) &&
2045                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2046                     priv->cfg->ops->lib->set_channel_switch) {
2047                         iwl_set_rate(priv);
2048                         /*
2049                          * at this point, staging_rxon has the
2050                          * configuration for channel switch
2051                          */
2052                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2053                                 ch);
2054                         if (!ret) {
2055                                 iwl_print_rx_config_cmd(priv);
2056                                 goto out;
2057                         }
2058                         priv->switch_rxon.switch_in_progress = false;
2059                 }
2060  set_ch_out:
2061                 /* The list of supported rates and rate mask can be different
2062                  * for each band; since the band may have changed, reset
2063                  * the rate mask to what mac80211 lists */
2064                 iwl_set_rate(priv);
2065         }
2066
2067         if (changed & (IEEE80211_CONF_CHANGE_PS |
2068                         IEEE80211_CONF_CHANGE_IDLE)) {
2069                 ret = iwl_power_update_mode(priv, false);
2070                 if (ret)
2071                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2072         }
2073
2074         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2075                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2076                         priv->tx_power_user_lmt, conf->power_level);
2077
2078                 iwl_set_tx_power(priv, conf->power_level, false);
2079         }
2080
2081         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2082                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2083
2084                 spin_lock_irqsave(&priv->lock, flags);
2085                 priv->qos_data.qos_active = qos_active;
2086                 iwl_update_qos(priv);
2087                 spin_unlock_irqrestore(&priv->lock, flags);
2088         }
2089
2090         if (!iwl_is_ready(priv)) {
2091                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2092                 goto out;
2093         }
2094
2095         if (scan_active)
2096                 goto out;
2097
2098         if (memcmp(&priv->active_rxon,
2099                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2100                 iwlcore_commit_rxon(priv);
2101         else
2102                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2103
2104
2105 out:
2106         IWL_DEBUG_MAC80211(priv, "leave\n");
2107         mutex_unlock(&priv->mutex);
2108         return ret;
2109 }
2110 EXPORT_SYMBOL(iwl_mac_config);
2111
2112 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2113 {
2114         struct iwl_priv *priv = hw->priv;
2115         unsigned long flags;
2116
2117         mutex_lock(&priv->mutex);
2118         IWL_DEBUG_MAC80211(priv, "enter\n");
2119
2120         spin_lock_irqsave(&priv->lock, flags);
2121         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2122         spin_unlock_irqrestore(&priv->lock, flags);
2123
2124         spin_lock_irqsave(&priv->lock, flags);
2125
2126         /* new association get rid of ibss beacon skb */
2127         if (priv->ibss_beacon)
2128                 dev_kfree_skb(priv->ibss_beacon);
2129
2130         priv->ibss_beacon = NULL;
2131
2132         priv->timestamp = 0;
2133
2134         spin_unlock_irqrestore(&priv->lock, flags);
2135
2136         if (!iwl_is_ready_rf(priv)) {
2137                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2138                 mutex_unlock(&priv->mutex);
2139                 return;
2140         }
2141
2142         /* we are restarting association process
2143          * clear RXON_FILTER_ASSOC_MSK bit
2144          */
2145         iwl_scan_cancel_timeout(priv, 100);
2146         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2147         iwlcore_commit_rxon(priv);
2148
2149         iwl_set_rate(priv);
2150
2151         mutex_unlock(&priv->mutex);
2152
2153         IWL_DEBUG_MAC80211(priv, "leave\n");
2154 }
2155 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2156
2157 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2158 {
2159         if (!priv->txq)
2160                 priv->txq = kzalloc(
2161                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2162                         GFP_KERNEL);
2163         if (!priv->txq) {
2164                 IWL_ERR(priv, "Not enough memory for txq\n");
2165                 return -ENOMEM;
2166         }
2167         return 0;
2168 }
2169 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2170
2171 void iwl_free_txq_mem(struct iwl_priv *priv)
2172 {
2173         kfree(priv->txq);
2174         priv->txq = NULL;
2175 }
2176 EXPORT_SYMBOL(iwl_free_txq_mem);
2177
2178 #ifdef CONFIG_IWLWIFI_DEBUGFS
2179
2180 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2181
2182 void iwl_reset_traffic_log(struct iwl_priv *priv)
2183 {
2184         priv->tx_traffic_idx = 0;
2185         priv->rx_traffic_idx = 0;
2186         if (priv->tx_traffic)
2187                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2188         if (priv->rx_traffic)
2189                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2190 }
2191
2192 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2193 {
2194         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2195
2196         if (iwl_debug_level & IWL_DL_TX) {
2197                 if (!priv->tx_traffic) {
2198                         priv->tx_traffic =
2199                                 kzalloc(traffic_size, GFP_KERNEL);
2200                         if (!priv->tx_traffic)
2201                                 return -ENOMEM;
2202                 }
2203         }
2204         if (iwl_debug_level & IWL_DL_RX) {
2205                 if (!priv->rx_traffic) {
2206                         priv->rx_traffic =
2207                                 kzalloc(traffic_size, GFP_KERNEL);
2208                         if (!priv->rx_traffic)
2209                                 return -ENOMEM;
2210                 }
2211         }
2212         iwl_reset_traffic_log(priv);
2213         return 0;
2214 }
2215 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2216
2217 void iwl_free_traffic_mem(struct iwl_priv *priv)
2218 {
2219         kfree(priv->tx_traffic);
2220         priv->tx_traffic = NULL;
2221
2222         kfree(priv->rx_traffic);
2223         priv->rx_traffic = NULL;
2224 }
2225 EXPORT_SYMBOL(iwl_free_traffic_mem);
2226
2227 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2228                       u16 length, struct ieee80211_hdr *header)
2229 {
2230         __le16 fc;
2231         u16 len;
2232
2233         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2234                 return;
2235
2236         if (!priv->tx_traffic)
2237                 return;
2238
2239         fc = header->frame_control;
2240         if (ieee80211_is_data(fc)) {
2241                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2242                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2243                 memcpy((priv->tx_traffic +
2244                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2245                        header, len);
2246                 priv->tx_traffic_idx =
2247                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2248         }
2249 }
2250 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2251
2252 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2253                       u16 length, struct ieee80211_hdr *header)
2254 {
2255         __le16 fc;
2256         u16 len;
2257
2258         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2259                 return;
2260
2261         if (!priv->rx_traffic)
2262                 return;
2263
2264         fc = header->frame_control;
2265         if (ieee80211_is_data(fc)) {
2266                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2267                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2268                 memcpy((priv->rx_traffic +
2269                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2270                        header, len);
2271                 priv->rx_traffic_idx =
2272                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2273         }
2274 }
2275 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2276
2277 const char *get_mgmt_string(int cmd)
2278 {
2279         switch (cmd) {
2280                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2281                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2282                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2283                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2284                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2285                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2286                 IWL_CMD(MANAGEMENT_BEACON);
2287                 IWL_CMD(MANAGEMENT_ATIM);
2288                 IWL_CMD(MANAGEMENT_DISASSOC);
2289                 IWL_CMD(MANAGEMENT_AUTH);
2290                 IWL_CMD(MANAGEMENT_DEAUTH);
2291                 IWL_CMD(MANAGEMENT_ACTION);
2292         default:
2293                 return "UNKNOWN";
2294
2295         }
2296 }
2297
2298 const char *get_ctrl_string(int cmd)
2299 {
2300         switch (cmd) {
2301                 IWL_CMD(CONTROL_BACK_REQ);
2302                 IWL_CMD(CONTROL_BACK);
2303                 IWL_CMD(CONTROL_PSPOLL);
2304                 IWL_CMD(CONTROL_RTS);
2305                 IWL_CMD(CONTROL_CTS);
2306                 IWL_CMD(CONTROL_ACK);
2307                 IWL_CMD(CONTROL_CFEND);
2308                 IWL_CMD(CONTROL_CFENDACK);
2309         default:
2310                 return "UNKNOWN";
2311
2312         }
2313 }
2314
2315 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2316 {
2317         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2318         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2319         priv->led_tpt = 0;
2320 }
2321
2322 /*
2323  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2324  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2325  * Use debugFs to display the rx/rx_statistics
2326  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2327  * information will be recorded, but DATA pkt still will be recorded
2328  * for the reason of iwl_led.c need to control the led blinking based on
2329  * number of tx and rx data.
2330  *
2331  */
2332 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2333 {
2334         struct traffic_stats    *stats;
2335
2336         if (is_tx)
2337                 stats = &priv->tx_stats;
2338         else
2339                 stats = &priv->rx_stats;
2340
2341         if (ieee80211_is_mgmt(fc)) {
2342                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2343                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2344                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2345                         break;
2346                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2347                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2348                         break;
2349                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2350                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2351                         break;
2352                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2353                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2354                         break;
2355                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2356                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2357                         break;
2358                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2359                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2360                         break;
2361                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2362                         stats->mgmt[MANAGEMENT_BEACON]++;
2363                         break;
2364                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2365                         stats->mgmt[MANAGEMENT_ATIM]++;
2366                         break;
2367                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2368                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2369                         break;
2370                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2371                         stats->mgmt[MANAGEMENT_AUTH]++;
2372                         break;
2373                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2374                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2375                         break;
2376                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2377                         stats->mgmt[MANAGEMENT_ACTION]++;
2378                         break;
2379                 }
2380         } else if (ieee80211_is_ctl(fc)) {
2381                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2382                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2383                         stats->ctrl[CONTROL_BACK_REQ]++;
2384                         break;
2385                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2386                         stats->ctrl[CONTROL_BACK]++;
2387                         break;
2388                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2389                         stats->ctrl[CONTROL_PSPOLL]++;
2390                         break;
2391                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2392                         stats->ctrl[CONTROL_RTS]++;
2393                         break;
2394                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2395                         stats->ctrl[CONTROL_CTS]++;
2396                         break;
2397                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2398                         stats->ctrl[CONTROL_ACK]++;
2399                         break;
2400                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2401                         stats->ctrl[CONTROL_CFEND]++;
2402                         break;
2403                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2404                         stats->ctrl[CONTROL_CFENDACK]++;
2405                         break;
2406                 }
2407         } else {
2408                 /* data */
2409                 stats->data_cnt++;
2410                 stats->data_bytes += len;
2411         }
2412         iwl_leds_background(priv);
2413 }
2414 EXPORT_SYMBOL(iwl_update_stats);
2415 #endif
2416
2417 static const char *get_csr_string(int cmd)
2418 {
2419         switch (cmd) {
2420                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2421                 IWL_CMD(CSR_INT_COALESCING);
2422                 IWL_CMD(CSR_INT);
2423                 IWL_CMD(CSR_INT_MASK);
2424                 IWL_CMD(CSR_FH_INT_STATUS);
2425                 IWL_CMD(CSR_GPIO_IN);
2426                 IWL_CMD(CSR_RESET);
2427                 IWL_CMD(CSR_GP_CNTRL);
2428                 IWL_CMD(CSR_HW_REV);
2429                 IWL_CMD(CSR_EEPROM_REG);
2430                 IWL_CMD(CSR_EEPROM_GP);
2431                 IWL_CMD(CSR_OTP_GP_REG);
2432                 IWL_CMD(CSR_GIO_REG);
2433                 IWL_CMD(CSR_GP_UCODE_REG);
2434                 IWL_CMD(CSR_GP_DRIVER_REG);
2435                 IWL_CMD(CSR_UCODE_DRV_GP1);
2436                 IWL_CMD(CSR_UCODE_DRV_GP2);
2437                 IWL_CMD(CSR_LED_REG);
2438                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2439                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2440                 IWL_CMD(CSR_ANA_PLL_CFG);
2441                 IWL_CMD(CSR_HW_REV_WA_REG);
2442                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2443         default:
2444                 return "UNKNOWN";
2445
2446         }
2447 }
2448
2449 void iwl_dump_csr(struct iwl_priv *priv)
2450 {
2451         int i;
2452         u32 csr_tbl[] = {
2453                 CSR_HW_IF_CONFIG_REG,
2454                 CSR_INT_COALESCING,
2455                 CSR_INT,
2456                 CSR_INT_MASK,
2457                 CSR_FH_INT_STATUS,
2458                 CSR_GPIO_IN,
2459                 CSR_RESET,
2460                 CSR_GP_CNTRL,
2461                 CSR_HW_REV,
2462                 CSR_EEPROM_REG,
2463                 CSR_EEPROM_GP,
2464                 CSR_OTP_GP_REG,
2465                 CSR_GIO_REG,
2466                 CSR_GP_UCODE_REG,
2467                 CSR_GP_DRIVER_REG,
2468                 CSR_UCODE_DRV_GP1,
2469                 CSR_UCODE_DRV_GP2,
2470                 CSR_LED_REG,
2471                 CSR_DRAM_INT_TBL_REG,
2472                 CSR_GIO_CHICKEN_BITS,
2473                 CSR_ANA_PLL_CFG,
2474                 CSR_HW_REV_WA_REG,
2475                 CSR_DBG_HPET_MEM_REG
2476         };
2477         IWL_ERR(priv, "CSR values:\n");
2478         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2479                 "CSR_INT_PERIODIC_REG)\n");
2480         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2481                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2482                         get_csr_string(csr_tbl[i]),
2483                         iwl_read32(priv, csr_tbl[i]));
2484         }
2485 }
2486 EXPORT_SYMBOL(iwl_dump_csr);
2487
2488 static const char *get_fh_string(int cmd)
2489 {
2490         switch (cmd) {
2491                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2492                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2493                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2494                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2495                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2496                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2497                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2498                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2499                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2500         default:
2501                 return "UNKNOWN";
2502
2503         }
2504 }
2505
2506 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2507 {
2508         int i;
2509 #ifdef CONFIG_IWLWIFI_DEBUG
2510         int pos = 0;
2511         size_t bufsz = 0;
2512 #endif
2513         u32 fh_tbl[] = {
2514                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2515                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2516                 FH_RSCSR_CHNL0_WPTR,
2517                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2518                 FH_MEM_RSSR_SHARED_CTRL_REG,
2519                 FH_MEM_RSSR_RX_STATUS_REG,
2520                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2521                 FH_TSSR_TX_STATUS_REG,
2522                 FH_TSSR_TX_ERROR_REG
2523         };
2524 #ifdef CONFIG_IWLWIFI_DEBUG
2525         if (display) {
2526                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2527                 *buf = kmalloc(bufsz, GFP_KERNEL);
2528                 if (!*buf)
2529                         return -ENOMEM;
2530                 pos += scnprintf(*buf + pos, bufsz - pos,
2531                                 "FH register values:\n");
2532                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2533                         pos += scnprintf(*buf + pos, bufsz - pos,
2534                                 "  %34s: 0X%08x\n",
2535                                 get_fh_string(fh_tbl[i]),
2536                                 iwl_read_direct32(priv, fh_tbl[i]));
2537                 }
2538                 return pos;
2539         }
2540 #endif
2541         IWL_ERR(priv, "FH register values:\n");
2542         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2543                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2544                         get_fh_string(fh_tbl[i]),
2545                         iwl_read_direct32(priv, fh_tbl[i]));
2546         }
2547         return 0;
2548 }
2549 EXPORT_SYMBOL(iwl_dump_fh);
2550
2551 static void iwl_force_rf_reset(struct iwl_priv *priv)
2552 {
2553         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2554                 return;
2555
2556         if (!iwl_is_associated(priv)) {
2557                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2558                 return;
2559         }
2560         /*
2561          * There is no easy and better way to force reset the radio,
2562          * the only known method is switching channel which will force to
2563          * reset and tune the radio.
2564          * Use internal short scan (single channel) operation to should
2565          * achieve this objective.
2566          * Driver should reset the radio when number of consecutive missed
2567          * beacon, or any other uCode error condition detected.
2568          */
2569         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2570         iwl_internal_short_hw_scan(priv);
2571 }
2572
2573
2574 int iwl_force_reset(struct iwl_priv *priv, int mode)
2575 {
2576         struct iwl_force_reset *force_reset;
2577
2578         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2579                 return -EINVAL;
2580
2581         if (mode >= IWL_MAX_FORCE_RESET) {
2582                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2583                 return -EINVAL;
2584         }
2585         force_reset = &priv->force_reset[mode];
2586         force_reset->reset_request_count++;
2587         if (force_reset->last_force_reset_jiffies &&
2588             time_after(force_reset->last_force_reset_jiffies +
2589             force_reset->reset_duration, jiffies)) {
2590                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2591                 force_reset->reset_reject_count++;
2592                 return -EAGAIN;
2593         }
2594         force_reset->reset_success_count++;
2595         force_reset->last_force_reset_jiffies = jiffies;
2596         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2597         switch (mode) {
2598         case IWL_RF_RESET:
2599                 iwl_force_rf_reset(priv);
2600                 break;
2601         case IWL_FW_RESET:
2602                 IWL_ERR(priv, "On demand firmware reload\n");
2603                 /* Set the FW error flag -- cleared on iwl_down */
2604                 set_bit(STATUS_FW_ERROR, &priv->status);
2605                 wake_up_interruptible(&priv->wait_command_queue);
2606                 /*
2607                  * Keep the restart process from trying to send host
2608                  * commands by clearing the INIT status bit
2609                  */
2610                 clear_bit(STATUS_READY, &priv->status);
2611                 queue_work(priv->workqueue, &priv->restart);
2612                 break;
2613         }
2614         return 0;
2615 }
2616 EXPORT_SYMBOL(iwl_force_reset);
2617
2618 /**
2619  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2620  *
2621  * During normal condition (no queue is stuck), the timer is continually set to
2622  * execute every monitor_recover_period milliseconds after the last timer
2623  * expired.  When the queue read_ptr is at the same place, the timer is
2624  * shorten to 100mSecs.  This is
2625  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2626  *      2) to detect the stuck queues quicker before the station and AP can
2627  *      disassociate each other.
2628  *
2629  * This function monitors all the tx queues and recover from it if any
2630  * of the queues are stuck.
2631  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2632  *      it will recover by resetting the firmware and return.
2633  * 2. Then, it checks for station association.  If it associates it will check
2634  *      other queues.  If any queue is stuck, it will recover by resetting
2635  *      the firmware.
2636  * Note: It the number of times the queue read_ptr to be at the same place to
2637  *      be MAX_REPEAT+1 in order to consider to be stuck.
2638  */
2639 /*
2640  * The maximum number of times the read pointer of the tx queue at the
2641  * same place without considering to be stuck.
2642  */
2643 #define MAX_REPEAT      (2)
2644 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2645 {
2646         struct iwl_tx_queue *txq;
2647         struct iwl_queue *q;
2648
2649         txq = &priv->txq[cnt];
2650         q = &txq->q;
2651         /* queue is empty, skip */
2652         if (q->read_ptr != q->write_ptr) {
2653                 if (q->read_ptr == q->last_read_ptr) {
2654                         /* a queue has not been read from last time */
2655                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2656                                 IWL_ERR(priv,
2657                                         "queue %d stuck %d time. Fw reload.\n",
2658                                         q->id, q->repeat_same_read_ptr);
2659                                 q->repeat_same_read_ptr = 0;
2660                                 iwl_force_reset(priv, IWL_FW_RESET);
2661                         } else {
2662                                 q->repeat_same_read_ptr++;
2663                                 IWL_DEBUG_RADIO(priv,
2664                                                 "queue %d, not read %d time\n",
2665                                                 q->id,
2666                                                 q->repeat_same_read_ptr);
2667                                 mod_timer(&priv->monitor_recover, jiffies +
2668                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2669                         }
2670                         return 1;
2671                 } else {
2672                         q->last_read_ptr = q->read_ptr;
2673                         q->repeat_same_read_ptr = 0;
2674                 }
2675         }
2676         return 0;
2677 }
2678
2679 void iwl_bg_monitor_recover(unsigned long data)
2680 {
2681         struct iwl_priv *priv = (struct iwl_priv *)data;
2682         int cnt;
2683
2684         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2685                 return;
2686
2687         /* monitor and check for stuck cmd queue */
2688         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2689                 return;
2690
2691         /* monitor and check for other stuck queues */
2692         if (iwl_is_associated(priv)) {
2693                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2694                         /* skip as we already checked the command queue */
2695                         if (cnt == IWL_CMD_QUEUE_NUM)
2696                                 continue;
2697                         if (iwl_check_stuck_queue(priv, cnt))
2698                                 return;
2699                 }
2700         }
2701         /*
2702          * Reschedule the timer to occur in
2703          * priv->cfg->monitor_recover_period
2704          */
2705         mod_timer(&priv->monitor_recover,
2706                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2707 }
2708 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2709
2710 #ifdef CONFIG_PM
2711
2712 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2713 {
2714         struct iwl_priv *priv = pci_get_drvdata(pdev);
2715
2716         /*
2717          * This function is called when system goes into suspend state
2718          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2719          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2720          * it will not call apm_ops.stop() to stop the DMA operation.
2721          * Calling apm_ops.stop here to make sure we stop the DMA.
2722          */
2723         priv->cfg->ops->lib->apm_ops.stop(priv);
2724
2725         pci_save_state(pdev);
2726         pci_disable_device(pdev);
2727         pci_set_power_state(pdev, PCI_D3hot);
2728
2729         return 0;
2730 }
2731 EXPORT_SYMBOL(iwl_pci_suspend);
2732
2733 int iwl_pci_resume(struct pci_dev *pdev)
2734 {
2735         struct iwl_priv *priv = pci_get_drvdata(pdev);
2736         int ret;
2737
2738         /*
2739          * We disable the RETRY_TIMEOUT register (0x41) to keep
2740          * PCI Tx retries from interfering with C3 CPU state.
2741          */
2742         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2743
2744         pci_set_power_state(pdev, PCI_D0);
2745         ret = pci_enable_device(pdev);
2746         if (ret)
2747                 return ret;
2748         pci_restore_state(pdev);
2749         iwl_enable_interrupts(priv);
2750
2751         return 0;
2752 }
2753 EXPORT_SYMBOL(iwl_pci_resume);
2754
2755 #endif /* CONFIG_PM */