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         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
 984         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 985         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 986         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
 987 }
 988 EXPORT_SYMBOL(iwl_connection_init_rx_config);
 989
 990 static void iwl_set_rate(struct iwl_priv *priv)
 991 {
 992         const struct ieee80211_supported_band *hw = NULL;
 993         struct ieee80211_rate *rate;
 994         int i;
 995
 996         hw = iwl_get_hw_mode(priv, priv->band);
 997         if (!hw) {
 998                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 999                 return;
1000         }
1001
1002         priv->active_rate = 0;
1003
1004         for (i = 0; i < hw->n_bitrates; i++) {
1005                 rate = &(hw->bitrates[i]);
1006                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1007                         priv->active_rate |= (1 << rate->hw_value);
1008         }
1009
1010         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1011
1012         priv->staging_rxon.cck_basic_rates =
1013             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1014
1015         priv->staging_rxon.ofdm_basic_rates =
1016            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1017 }
1018
1019 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1020 {
1021         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1022         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1023         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1024
1025         if (priv->switch_rxon.switch_in_progress) {
1026                 if (!le32_to_cpu(csa->status) &&
1027                     (csa->channel == priv->switch_rxon.channel)) {
1028                         rxon->channel = csa->channel;
1029                         priv->staging_rxon.channel = csa->channel;
1030                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1031                               le16_to_cpu(csa->channel));
1032                 } else
1033                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1034                               le16_to_cpu(csa->channel));
1035
1036                 priv->switch_rxon.switch_in_progress = false;
1037         }
1038 }
1039 EXPORT_SYMBOL(iwl_rx_csa);
1040
1041 #ifdef CONFIG_IWLWIFI_DEBUG
1042 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1043 {
1044         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1045
1046         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1047         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1048         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1049         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1050         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1051                         le32_to_cpu(rxon->filter_flags));
1052         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1053         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1054                         rxon->ofdm_basic_rates);
1055         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1056         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1057         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1058         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1059 }
1060 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1061 #endif
1062 /**
1063  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1064  */
1065 void iwl_irq_handle_error(struct iwl_priv *priv)
1066 {
1067         /* Set the FW error flag -- cleared on iwl_down */
1068         set_bit(STATUS_FW_ERROR, &priv->status);
1069
1070         /* Cancel currently queued command. */
1071         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1072
1073         IWL_ERR(priv, "Loaded firmware version: %s\n",
1074                 priv->hw->wiphy->fw_version);
1075
1076         priv->cfg->ops->lib->dump_nic_error_log(priv);
1077         if (priv->cfg->ops->lib->dump_csr)
1078                 priv->cfg->ops->lib->dump_csr(priv);
1079         if (priv->cfg->ops->lib->dump_fh)
1080                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1081         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1082 #ifdef CONFIG_IWLWIFI_DEBUG
1083         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1084                 iwl_print_rx_config_cmd(priv);
1085 #endif
1086
1087         wake_up_interruptible(&priv->wait_command_queue);
1088
1089         /* Keep the restart process from trying to send host
1090          * commands by clearing the INIT status bit */
1091         clear_bit(STATUS_READY, &priv->status);
1092
1093         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1094                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1095                           "Restarting adapter due to uCode error.\n");
1096
1097                 if (priv->cfg->mod_params->restart_fw)
1098                         queue_work(priv->workqueue, &priv->restart);
1099         }
1100 }
1101 EXPORT_SYMBOL(iwl_irq_handle_error);
1102
1103 static int iwl_apm_stop_master(struct iwl_priv *priv)
1104 {
1105         int ret = 0;
1106
1107         /* stop device's busmaster DMA activity */
1108         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1109
1110         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1111                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1112         if (ret)
1113                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1114
1115         IWL_DEBUG_INFO(priv, "stop master\n");
1116
1117         return ret;
1118 }
1119
1120 void iwl_apm_stop(struct iwl_priv *priv)
1121 {
1122         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1123
1124         /* Stop device's DMA activity */
1125         iwl_apm_stop_master(priv);
1126
1127         /* Reset the entire device */
1128         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1129
1130         udelay(10);
1131
1132         /*
1133          * Clear "initialization complete" bit to move adapter from
1134          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1135          */
1136         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1137 }
1138 EXPORT_SYMBOL(iwl_apm_stop);
1139
1140
1141 /*
1142  * Start up NIC's basic functionality after it has been reset
1143  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1144  * NOTE:  This does not load uCode nor start the embedded processor
1145  */
1146 int iwl_apm_init(struct iwl_priv *priv)
1147 {
1148         int ret = 0;
1149         u16 lctl;
1150
1151         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1152
1153         /*
1154          * Use "set_bit" below rather than "write", to preserve any hardware
1155          * bits already set by default after reset.
1156          */
1157
1158         /* Disable L0S exit timer (platform NMI Work/Around) */
1159         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1160                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1161
1162         /*
1163          * Disable L0s without affecting L1;
1164          *  don't wait for ICH L0s (ICH bug W/A)
1165          */
1166         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1167                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1168
1169         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1170         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1171
1172         /*
1173          * Enable HAP INTA (interrupt from management bus) to
1174          * wake device's PCI Express link L1a -> L0s
1175          * NOTE:  This is no-op for 3945 (non-existant bit)
1176          */
1177         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1178                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1179
1180         /*
1181          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1182          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1183          * If so (likely), disable L0S, so device moves directly L0->L1;
1184          *    costs negligible amount of power savings.
1185          * If not (unlikely), enable L0S, so there is at least some
1186          *    power savings, even without L1.
1187          */
1188         if (priv->cfg->set_l0s) {
1189                 lctl = iwl_pcie_link_ctl(priv);
1190                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1191                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1192                         /* L1-ASPM enabled; disable(!) L0S  */
1193                         iwl_set_bit(priv, CSR_GIO_REG,
1194                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1195                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1196                 } else {
1197                         /* L1-ASPM disabled; enable(!) L0S */
1198                         iwl_clear_bit(priv, CSR_GIO_REG,
1199                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1200                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1201                 }
1202         }
1203
1204         /* Configure analog phase-lock-loop before activating to D0A */
1205         if (priv->cfg->pll_cfg_val)
1206                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1207
1208         /*
1209          * Set "initialization complete" bit to move adapter from
1210          * D0U* --> D0A* (powered-up active) state.
1211          */
1212         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1213
1214         /*
1215          * Wait for clock stabilization; once stabilized, access to
1216          * device-internal resources is supported, e.g. iwl_write_prph()
1217          * and accesses to uCode SRAM.
1218          */
1219         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1220                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1221                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1222         if (ret < 0) {
1223                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1224                 goto out;
1225         }
1226
1227         /*
1228          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1229          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1230          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1231          * and don't need BSM to restore data after power-saving sleep.
1232          *
1233          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1234          * do not disable clocks.  This preserves any hardware bits already
1235          * set by default in "CLK_CTRL_REG" after reset.
1236          */
1237         if (priv->cfg->use_bsm)
1238                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1239                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1240         else
1241                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1242                         APMG_CLK_VAL_DMA_CLK_RQT);
1243         udelay(20);
1244
1245         /* Disable L1-Active */
1246         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1247                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1248
1249 out:
1250         return ret;
1251 }
1252 EXPORT_SYMBOL(iwl_apm_init);
1253
1254
1255
1256 void iwl_configure_filter(struct ieee80211_hw *hw,
1257                           unsigned int changed_flags,
1258                           unsigned int *total_flags,
1259                           u64 multicast)
1260 {
1261         struct iwl_priv *priv = hw->priv;
1262         __le32 filter_or = 0, filter_nand = 0;
1263
1264 #define CHK(test, flag) do { \
1265         if (*total_flags & (test))              \
1266                 filter_or |= (flag);            \
1267         else                                    \
1268                 filter_nand |= (flag);          \
1269         } while (0)
1270
1271         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1272                         changed_flags, *total_flags);
1273
1274         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1275         CHK(FIF_ALLMULTI, RXON_FILTER_ACCEPT_GRP_MSK);
1276         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1277         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1278
1279 #undef CHK
1280
1281         mutex_lock(&priv->mutex);
1282
1283         priv->staging_rxon.filter_flags &= ~filter_nand;
1284         priv->staging_rxon.filter_flags |= filter_or;
1285
1286         iwlcore_commit_rxon(priv);
1287
1288         mutex_unlock(&priv->mutex);
1289
1290         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1291                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1292 }
1293 EXPORT_SYMBOL(iwl_configure_filter);
1294
1295 int iwl_set_hw_params(struct iwl_priv *priv)
1296 {
1297         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1298         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1299         if (priv->cfg->mod_params->amsdu_size_8K)
1300                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1301         else
1302                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1303
1304         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1305
1306         if (priv->cfg->mod_params->disable_11n)
1307                 priv->cfg->sku &= ~IWL_SKU_N;
1308
1309         /* Device-specific setup */
1310         return priv->cfg->ops->lib->set_hw_params(priv);
1311 }
1312 EXPORT_SYMBOL(iwl_set_hw_params);
1313
1314 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1315 {
1316         int ret = 0;
1317         s8 prev_tx_power = priv->tx_power_user_lmt;
1318
1319         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1320                 IWL_WARN(priv,
1321                          "Requested user TXPOWER %d below lower limit %d.\n",
1322                          tx_power,
1323                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1324                 return -EINVAL;
1325         }
1326
1327         if (tx_power > priv->tx_power_device_lmt) {
1328                 IWL_WARN(priv,
1329                         "Requested user TXPOWER %d above upper limit %d.\n",
1330                          tx_power, priv->tx_power_device_lmt);
1331                 return -EINVAL;
1332         }
1333
1334         if (priv->tx_power_user_lmt != tx_power)
1335                 force = true;
1336
1337         /* if nic is not up don't send command */
1338         if (iwl_is_ready_rf(priv)) {
1339                 priv->tx_power_user_lmt = tx_power;
1340                 if (force && priv->cfg->ops->lib->send_tx_power)
1341                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1342                 else if (!priv->cfg->ops->lib->send_tx_power)
1343                         ret = -EOPNOTSUPP;
1344                 /*
1345                  * if fail to set tx_power, restore the orig. tx power
1346                  */
1347                 if (ret)
1348                         priv->tx_power_user_lmt = prev_tx_power;
1349         }
1350
1351         /*
1352          * Even this is an async host command, the command
1353          * will always report success from uCode
1354          * So once driver can placing the command into the queue
1355          * successfully, driver can use priv->tx_power_user_lmt
1356          * to reflect the current tx power
1357          */
1358         return ret;
1359 }
1360 EXPORT_SYMBOL(iwl_set_tx_power);
1361
1362 irqreturn_t iwl_isr_legacy(int irq, void *data)
1363 {
1364         struct iwl_priv *priv = data;
1365         u32 inta, inta_mask;
1366         u32 inta_fh;
1367         unsigned long flags;
1368         if (!priv)
1369                 return IRQ_NONE;
1370
1371         spin_lock_irqsave(&priv->lock, flags);
1372
1373         /* Disable (but don't clear!) interrupts here to avoid
1374          *    back-to-back ISRs and sporadic interrupts from our NIC.
1375          * If we have something to service, the tasklet will re-enable ints.
1376          * If we *don't* have something, we'll re-enable before leaving here. */
1377         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1378         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1379
1380         /* Discover which interrupts are active/pending */
1381         inta = iwl_read32(priv, CSR_INT);
1382         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1383
1384         /* Ignore interrupt if there's nothing in NIC to service.
1385          * This may be due to IRQ shared with another device,
1386          * or due to sporadic interrupts thrown from our NIC. */
1387         if (!inta && !inta_fh) {
1388                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1389                 goto none;
1390         }
1391
1392         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1393                 /* Hardware disappeared. It might have already raised
1394                  * an interrupt */
1395                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1396                 goto unplugged;
1397         }
1398
1399         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1400                       inta, inta_mask, inta_fh);
1401
1402         inta &= ~CSR_INT_BIT_SCD;
1403
1404         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1405         if (likely(inta || inta_fh))
1406                 tasklet_schedule(&priv->irq_tasklet);
1407
1408  unplugged:
1409         spin_unlock_irqrestore(&priv->lock, flags);
1410         return IRQ_HANDLED;
1411
1412  none:
1413         /* re-enable interrupts here since we don't have anything to service. */
1414         /* only Re-enable if diabled by irq */
1415         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1416                 iwl_enable_interrupts(priv);
1417         spin_unlock_irqrestore(&priv->lock, flags);
1418         return IRQ_NONE;
1419 }
1420 EXPORT_SYMBOL(iwl_isr_legacy);
1421
1422 void iwl_send_bt_config(struct iwl_priv *priv)
1423 {
1424         struct iwl_bt_cmd bt_cmd = {
1425                 .lead_time = BT_LEAD_TIME_DEF,
1426                 .max_kill = BT_MAX_KILL_DEF,
1427                 .kill_ack_mask = 0,
1428                 .kill_cts_mask = 0,
1429         };
1430
1431         if (!bt_coex_active)
1432                 bt_cmd.flags = BT_COEX_DISABLE;
1433         else
1434                 bt_cmd.flags = BT_COEX_ENABLE;
1435
1436         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1437                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1438
1439         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1440                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1441                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1442 }
1443 EXPORT_SYMBOL(iwl_send_bt_config);
1444
1445 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1446 {
1447         struct iwl_statistics_cmd statistics_cmd = {
1448                 .configuration_flags =
1449                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1450         };
1451
1452         if (flags & CMD_ASYNC)
1453                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1454                                                sizeof(struct iwl_statistics_cmd),
1455                                                &statistics_cmd, NULL);
1456         else
1457                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1458                                         sizeof(struct iwl_statistics_cmd),
1459                                         &statistics_cmd);
1460 }
1461 EXPORT_SYMBOL(iwl_send_statistics_request);
1462
1463 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1464 {
1465         struct iwl_ct_kill_config cmd;
1466         struct iwl_ct_kill_throttling_config adv_cmd;
1467         unsigned long flags;
1468         int ret = 0;
1469
1470         spin_lock_irqsave(&priv->lock, flags);
1471         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1472                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1473         spin_unlock_irqrestore(&priv->lock, flags);
1474         priv->thermal_throttle.ct_kill_toggle = false;
1475
1476         if (priv->cfg->support_ct_kill_exit) {
1477                 adv_cmd.critical_temperature_enter =
1478                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1479                 adv_cmd.critical_temperature_exit =
1480                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1481
1482                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1483                                        sizeof(adv_cmd), &adv_cmd);
1484                 if (ret)
1485                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1486                 else
1487                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1488                                         "succeeded, "
1489                                         "critical temperature enter is %d,"
1490                                         "exit is %d\n",
1491                                        priv->hw_params.ct_kill_threshold,
1492                                        priv->hw_params.ct_kill_exit_threshold);
1493         } else {
1494                 cmd.critical_temperature_R =
1495                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1496
1497                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1498                                        sizeof(cmd), &cmd);
1499                 if (ret)
1500                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1501                 else
1502                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1503                                         "succeeded, "
1504                                         "critical temperature is %d\n",
1505                                         priv->hw_params.ct_kill_threshold);
1506         }
1507 }
1508 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1509
1510
1511 /*
1512  * CARD_STATE_CMD
1513  *
1514  * Use: Sets the device's internal card state to enable, disable, or halt
1515  *
1516  * When in the 'enable' state the card operates as normal.
1517  * When in the 'disable' state, the card enters into a low power mode.
1518  * When in the 'halt' state, the card is shut down and must be fully
1519  * restarted to come back on.
1520  */
1521 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1522 {
1523         struct iwl_host_cmd cmd = {
1524                 .id = REPLY_CARD_STATE_CMD,
1525                 .len = sizeof(u32),
1526                 .data = &flags,
1527                 .flags = meta_flag,
1528         };
1529
1530         return iwl_send_cmd(priv, &cmd);
1531 }
1532
1533 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1534                            struct iwl_rx_mem_buffer *rxb)
1535 {
1536 #ifdef CONFIG_IWLWIFI_DEBUG
1537         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1538         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1539         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1540                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1541 #endif
1542 }
1543 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1544
1545 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1546                                       struct iwl_rx_mem_buffer *rxb)
1547 {
1548         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1549         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1550         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1551                         "notification for %s:\n", len,
1552                         get_cmd_string(pkt->hdr.cmd));
1553         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1554 }
1555 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1556
1557 void iwl_rx_reply_error(struct iwl_priv *priv,
1558                         struct iwl_rx_mem_buffer *rxb)
1559 {
1560         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1561
1562         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1563                 "seq 0x%04X ser 0x%08X\n",
1564                 le32_to_cpu(pkt->u.err_resp.error_type),
1565                 get_cmd_string(pkt->u.err_resp.cmd_id),
1566                 pkt->u.err_resp.cmd_id,
1567                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1568                 le32_to_cpu(pkt->u.err_resp.error_info));
1569 }
1570 EXPORT_SYMBOL(iwl_rx_reply_error);
1571
1572 void iwl_clear_isr_stats(struct iwl_priv *priv)
1573 {
1574         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1575 }
1576
1577 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1578                            const struct ieee80211_tx_queue_params *params)
1579 {
1580         struct iwl_priv *priv = hw->priv;
1581         unsigned long flags;
1582         int q;
1583
1584         IWL_DEBUG_MAC80211(priv, "enter\n");
1585
1586         if (!iwl_is_ready_rf(priv)) {
1587                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1588                 return -EIO;
1589         }
1590
1591         if (queue >= AC_NUM) {
1592                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1593                 return 0;
1594         }
1595
1596         q = AC_NUM - 1 - queue;
1597
1598         spin_lock_irqsave(&priv->lock, flags);
1599
1600         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1601         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1602         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1603         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1604                         cpu_to_le16((params->txop * 32));
1605
1606         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1607
1608         spin_unlock_irqrestore(&priv->lock, flags);
1609
1610         IWL_DEBUG_MAC80211(priv, "leave\n");
1611         return 0;
1612 }
1613 EXPORT_SYMBOL(iwl_mac_conf_tx);
1614
1615 static void iwl_ht_conf(struct iwl_priv *priv,
1616                         struct ieee80211_vif *vif)
1617 {
1618         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1619         struct ieee80211_sta *sta;
1620         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1621
1622         IWL_DEBUG_MAC80211(priv, "enter:\n");
1623
1624         if (!ht_conf->is_ht)
1625                 return;
1626
1627         ht_conf->ht_protection =
1628                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1629         ht_conf->non_GF_STA_present =
1630                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1631
1632         ht_conf->single_chain_sufficient = false;
1633
1634         switch (vif->type) {
1635         case NL80211_IFTYPE_STATION:
1636                 rcu_read_lock();
1637                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1638                 if (sta) {
1639                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1640                         int maxstreams;
1641
1642                         maxstreams = (ht_cap->mcs.tx_params &
1643                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1644                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1645                         maxstreams += 1;
1646
1647                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1648                             (ht_cap->mcs.rx_mask[2] == 0))
1649                                 ht_conf->single_chain_sufficient = true;
1650                         if (maxstreams <= 1)
1651                                 ht_conf->single_chain_sufficient = true;
1652                 } else {
1653                         /*
1654                          * If at all, this can only happen through a race
1655                          * when the AP disconnects us while we're still
1656                          * setting up the connection, in that case mac80211
1657                          * will soon tell us about that.
1658                          */
1659                         ht_conf->single_chain_sufficient = true;
1660                 }
1661                 rcu_read_unlock();
1662                 break;
1663         case NL80211_IFTYPE_ADHOC:
1664                 ht_conf->single_chain_sufficient = true;
1665                 break;
1666         default:
1667                 break;
1668         }
1669
1670         IWL_DEBUG_MAC80211(priv, "leave\n");
1671 }
1672
1673 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1674 {
1675         iwl_led_disassociate(priv);
1676         /*
1677          * inform the ucode that there is no longer an
1678          * association and that no more packets should be
1679          * sent
1680          */
1681         priv->staging_rxon.filter_flags &=
1682                 ~RXON_FILTER_ASSOC_MSK;
1683         priv->staging_rxon.assoc_id = 0;
1684         iwlcore_commit_rxon(priv);
1685 }
1686
1687 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1688                           struct ieee80211_vif *vif,
1689                           struct ieee80211_bss_conf *bss_conf,
1690                           u32 changes)
1691 {
1692         struct iwl_priv *priv = hw->priv;
1693         int ret;
1694
1695         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1696
1697         if (!iwl_is_alive(priv))
1698                 return;
1699
1700         mutex_lock(&priv->mutex);
1701
1702         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1703                 dev_kfree_skb(priv->ibss_beacon);
1704                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1705         }
1706
1707         if (changes & BSS_CHANGED_BEACON_INT) {
1708                 /* TODO: in AP mode, do something to make this take effect */
1709         }
1710
1711         if (changes & BSS_CHANGED_BSSID) {
1712                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1713
1714                 /*
1715                  * If there is currently a HW scan going on in the
1716                  * background then we need to cancel it else the RXON
1717                  * below/in post_associate will fail.
1718                  */
1719                 if (iwl_scan_cancel_timeout(priv, 100)) {
1720                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1721                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1722                         mutex_unlock(&priv->mutex);
1723                         return;
1724                 }
1725
1726                 /* mac80211 only sets assoc when in STATION mode */
1727                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1728                         memcpy(priv->staging_rxon.bssid_addr,
1729                                bss_conf->bssid, ETH_ALEN);
1730
1731                         /* currently needed in a few places */
1732                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1733                 } else {
1734                         priv->staging_rxon.filter_flags &=
1735                                 ~RXON_FILTER_ASSOC_MSK;
1736                 }
1737
1738         }
1739
1740         /*
1741          * This needs to be after setting the BSSID in case
1742          * mac80211 decides to do both changes at once because
1743          * it will invoke post_associate.
1744          */
1745         if (vif->type == NL80211_IFTYPE_ADHOC &&
1746             changes & BSS_CHANGED_BEACON) {
1747                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1748
1749                 if (beacon)
1750                         iwl_mac_beacon_update(hw, beacon);
1751         }
1752
1753         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1754                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1755                                    bss_conf->use_short_preamble);
1756                 if (bss_conf->use_short_preamble)
1757                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1758                 else
1759                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1760         }
1761
1762         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1763                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1764                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1765                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1766                 else
1767                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1768         }
1769
1770         if (changes & BSS_CHANGED_BASIC_RATES) {
1771                 /* XXX use this information
1772                  *
1773                  * To do that, remove code from iwl_set_rate() and put something
1774                  * like this here:
1775                  *
1776                 if (A-band)
1777                         priv->staging_rxon.ofdm_basic_rates =
1778                                 bss_conf->basic_rates;
1779                 else
1780                         priv->staging_rxon.ofdm_basic_rates =
1781                                 bss_conf->basic_rates >> 4;
1782                         priv->staging_rxon.cck_basic_rates =
1783                                 bss_conf->basic_rates & 0xF;
1784                  */
1785         }
1786
1787         if (changes & BSS_CHANGED_HT) {
1788                 iwl_ht_conf(priv, vif);
1789
1790                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1791                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1792         }
1793
1794         if (changes & BSS_CHANGED_ASSOC) {
1795                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1796                 if (bss_conf->assoc) {
1797                         priv->timestamp = bss_conf->timestamp;
1798
1799                         iwl_led_associate(priv);
1800
1801                         if (!iwl_is_rfkill(priv))
1802                                 priv->cfg->ops->lib->post_associate(priv, vif);
1803                 } else
1804                         iwl_set_no_assoc(priv);
1805         }
1806
1807         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1808                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1809                                    changes);
1810                 ret = iwl_send_rxon_assoc(priv);
1811                 if (!ret) {
1812                         /* Sync active_rxon with latest change. */
1813                         memcpy((void *)&priv->active_rxon,
1814                                 &priv->staging_rxon,
1815                                 sizeof(struct iwl_rxon_cmd));
1816                 }
1817         }
1818
1819         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1820                 if (vif->bss_conf.enable_beacon) {
1821                         memcpy(priv->staging_rxon.bssid_addr,
1822                                bss_conf->bssid, ETH_ALEN);
1823                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1824                         iwlcore_config_ap(priv, vif);
1825                 } else
1826                         iwl_set_no_assoc(priv);
1827         }
1828
1829         if (changes & BSS_CHANGED_IBSS) {
1830                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1831                                                         bss_conf->ibss_joined);
1832                 if (ret)
1833                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1834                                 bss_conf->ibss_joined ? "add" : "remove",
1835                                 bss_conf->bssid);
1836         }
1837
1838         mutex_unlock(&priv->mutex);
1839
1840         IWL_DEBUG_MAC80211(priv, "leave\n");
1841 }
1842 EXPORT_SYMBOL(iwl_bss_info_changed);
1843
1844 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1845 {
1846         struct iwl_priv *priv = hw->priv;
1847         unsigned long flags;
1848         __le64 timestamp;
1849
1850         IWL_DEBUG_MAC80211(priv, "enter\n");
1851
1852         if (!iwl_is_ready_rf(priv)) {
1853                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1854                 return -EIO;
1855         }
1856
1857         spin_lock_irqsave(&priv->lock, flags);
1858
1859         if (priv->ibss_beacon)
1860                 dev_kfree_skb(priv->ibss_beacon);
1861
1862         priv->ibss_beacon = skb;
1863
1864         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1865         priv->timestamp = le64_to_cpu(timestamp);
1866
1867         IWL_DEBUG_MAC80211(priv, "leave\n");
1868         spin_unlock_irqrestore(&priv->lock, flags);
1869
1870         priv->cfg->ops->lib->post_associate(priv, priv->vif);
1871
1872         return 0;
1873 }
1874 EXPORT_SYMBOL(iwl_mac_beacon_update);
1875
1876 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1877 {
1878         iwl_connection_init_rx_config(priv, vif);
1879
1880         if (priv->cfg->ops->hcmd->set_rxon_chain)
1881                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1882
1883         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1884
1885         return iwlcore_commit_rxon(priv);
1886 }
1887
1888 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1889 {
1890         struct iwl_priv *priv = hw->priv;
1891         int err = 0;
1892
1893         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
1894
1895         mutex_lock(&priv->mutex);
1896
1897         if (WARN_ON(!iwl_is_ready_rf(priv))) {
1898                 err = -EINVAL;
1899                 goto out;
1900         }
1901
1902         if (priv->vif) {
1903                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
1904                 err = -EOPNOTSUPP;
1905                 goto out;
1906         }
1907
1908         priv->vif = vif;
1909         priv->iw_mode = vif->type;
1910
1911         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
1912         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
1913
1914         err = iwl_set_mode(priv, vif);
1915         if (err)
1916                 goto out_err;
1917
1918         goto out;
1919
1920  out_err:
1921         priv->vif = NULL;
1922         priv->iw_mode = NL80211_IFTYPE_STATION;
1923  out:
1924         mutex_unlock(&priv->mutex);
1925
1926         IWL_DEBUG_MAC80211(priv, "leave\n");
1927         return err;
1928 }
1929 EXPORT_SYMBOL(iwl_mac_add_interface);
1930
1931 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1932                               struct ieee80211_vif *vif)
1933 {
1934         struct iwl_priv *priv = hw->priv;
1935
1936         IWL_DEBUG_MAC80211(priv, "enter\n");
1937
1938         mutex_lock(&priv->mutex);
1939
1940         if (iwl_is_ready_rf(priv)) {
1941                 iwl_scan_cancel_timeout(priv, 100);
1942                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1943                 iwlcore_commit_rxon(priv);
1944         }
1945         if (priv->vif == vif) {
1946                 priv->vif = NULL;
1947                 memset(priv->bssid, 0, ETH_ALEN);
1948         }
1949         mutex_unlock(&priv->mutex);
1950
1951         IWL_DEBUG_MAC80211(priv, "leave\n");
1952
1953 }
1954 EXPORT_SYMBOL(iwl_mac_remove_interface);
1955
1956 /**
1957  * iwl_mac_config - mac80211 config callback
1958  */
1959 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
1960 {
1961         struct iwl_priv *priv = hw->priv;
1962         const struct iwl_channel_info *ch_info;
1963         struct ieee80211_conf *conf = &hw->conf;
1964         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1965         unsigned long flags = 0;
1966         int ret = 0;
1967         u16 ch;
1968         int scan_active = 0;
1969
1970         mutex_lock(&priv->mutex);
1971
1972         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
1973                                         conf->channel->hw_value, changed);
1974
1975         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
1976                         test_bit(STATUS_SCANNING, &priv->status))) {
1977                 scan_active = 1;
1978                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1979         }
1980
1981         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1982                        IEEE80211_CONF_CHANGE_CHANNEL)) {
1983                 /* mac80211 uses static for non-HT which is what we want */
1984                 priv->current_ht_config.smps = conf->smps_mode;
1985
1986                 /*
1987                  * Recalculate chain counts.
1988                  *
1989                  * If monitor mode is enabled then mac80211 will
1990                  * set up the SM PS mode to OFF if an HT channel is
1991                  * configured.
1992                  */
1993                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1994                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1995         }
1996
1997         /* during scanning mac80211 will delay channel setting until
1998          * scan finish with changed = 0
1999          */
2000         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2001                 if (scan_active)
2002                         goto set_ch_out;
2003
2004                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2005                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2006                 if (!is_channel_valid(ch_info)) {
2007                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2008                         ret = -EINVAL;
2009                         goto set_ch_out;
2010                 }
2011
2012                 spin_lock_irqsave(&priv->lock, flags);
2013
2014                 /* Configure HT40 channels */
2015                 ht_conf->is_ht = conf_is_ht(conf);
2016                 if (ht_conf->is_ht) {
2017                         if (conf_is_ht40_minus(conf)) {
2018                                 ht_conf->extension_chan_offset =
2019                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2020                                 ht_conf->is_40mhz = true;
2021                         } else if (conf_is_ht40_plus(conf)) {
2022                                 ht_conf->extension_chan_offset =
2023                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2024                                 ht_conf->is_40mhz = true;
2025                         } else {
2026                                 ht_conf->extension_chan_offset =
2027                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2028                                 ht_conf->is_40mhz = false;
2029                         }
2030                 } else
2031                         ht_conf->is_40mhz = false;
2032                 /* Default to no protection. Protection mode will later be set
2033                  * from BSS config in iwl_ht_conf */
2034                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2035
2036                 /* if we are switching from ht to 2.4 clear flags
2037                  * from any ht related info since 2.4 does not
2038                  * support ht */
2039                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2040                         priv->staging_rxon.flags = 0;
2041
2042                 iwl_set_rxon_channel(priv, conf->channel);
2043                 iwl_set_rxon_ht(priv, ht_conf);
2044
2045                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2046                 spin_unlock_irqrestore(&priv->lock, flags);
2047                 if (iwl_is_associated(priv) &&
2048                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2049                     priv->cfg->ops->lib->set_channel_switch) {
2050                         iwl_set_rate(priv);
2051                         /*
2052                          * at this point, staging_rxon has the
2053                          * configuration for channel switch
2054                          */
2055                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2056                                 ch);
2057                         if (!ret) {
2058                                 iwl_print_rx_config_cmd(priv);
2059                                 goto out;
2060                         }
2061                         priv->switch_rxon.switch_in_progress = false;
2062                 }
2063  set_ch_out:
2064                 /* The list of supported rates and rate mask can be different
2065                  * for each band; since the band may have changed, reset
2066                  * the rate mask to what mac80211 lists */
2067                 iwl_set_rate(priv);
2068         }
2069
2070         if (changed & (IEEE80211_CONF_CHANGE_PS |
2071                         IEEE80211_CONF_CHANGE_IDLE)) {
2072                 ret = iwl_power_update_mode(priv, false);
2073                 if (ret)
2074                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2075         }
2076
2077         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2078                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2079                         priv->tx_power_user_lmt, conf->power_level);
2080
2081                 iwl_set_tx_power(priv, conf->power_level, false);
2082         }
2083
2084         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2085                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2086
2087                 spin_lock_irqsave(&priv->lock, flags);
2088                 priv->qos_data.qos_active = qos_active;
2089                 iwl_update_qos(priv);
2090                 spin_unlock_irqrestore(&priv->lock, flags);
2091         }
2092
2093         if (!iwl_is_ready(priv)) {
2094                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2095                 goto out;
2096         }
2097
2098         if (scan_active)
2099                 goto out;
2100
2101         if (memcmp(&priv->active_rxon,
2102                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2103                 iwlcore_commit_rxon(priv);
2104         else
2105                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2106
2107
2108 out:
2109         IWL_DEBUG_MAC80211(priv, "leave\n");
2110         mutex_unlock(&priv->mutex);
2111         return ret;
2112 }
2113 EXPORT_SYMBOL(iwl_mac_config);
2114
2115 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2116 {
2117         struct iwl_priv *priv = hw->priv;
2118         unsigned long flags;
2119
2120         mutex_lock(&priv->mutex);
2121         IWL_DEBUG_MAC80211(priv, "enter\n");
2122
2123         spin_lock_irqsave(&priv->lock, flags);
2124         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2125         spin_unlock_irqrestore(&priv->lock, flags);
2126
2127         spin_lock_irqsave(&priv->lock, flags);
2128
2129         /* new association get rid of ibss beacon skb */
2130         if (priv->ibss_beacon)
2131                 dev_kfree_skb(priv->ibss_beacon);
2132
2133         priv->ibss_beacon = NULL;
2134
2135         priv->timestamp = 0;
2136
2137         spin_unlock_irqrestore(&priv->lock, flags);
2138
2139         if (!iwl_is_ready_rf(priv)) {
2140                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2141                 mutex_unlock(&priv->mutex);
2142                 return;
2143         }
2144
2145         /* we are restarting association process
2146          * clear RXON_FILTER_ASSOC_MSK bit
2147          */
2148         iwl_scan_cancel_timeout(priv, 100);
2149         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2150         iwlcore_commit_rxon(priv);
2151
2152         iwl_set_rate(priv);
2153
2154         mutex_unlock(&priv->mutex);
2155
2156         IWL_DEBUG_MAC80211(priv, "leave\n");
2157 }
2158 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2159
2160 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2161 {
2162         if (!priv->txq)
2163                 priv->txq = kzalloc(
2164                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2165                         GFP_KERNEL);
2166         if (!priv->txq) {
2167                 IWL_ERR(priv, "Not enough memory for txq\n");
2168                 return -ENOMEM;
2169         }
2170         return 0;
2171 }
2172 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2173
2174 void iwl_free_txq_mem(struct iwl_priv *priv)
2175 {
2176         kfree(priv->txq);
2177         priv->txq = NULL;
2178 }
2179 EXPORT_SYMBOL(iwl_free_txq_mem);
2180
2181 #ifdef CONFIG_IWLWIFI_DEBUGFS
2182
2183 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2184
2185 void iwl_reset_traffic_log(struct iwl_priv *priv)
2186 {
2187         priv->tx_traffic_idx = 0;
2188         priv->rx_traffic_idx = 0;
2189         if (priv->tx_traffic)
2190                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2191         if (priv->rx_traffic)
2192                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2193 }
2194
2195 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2196 {
2197         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2198
2199         if (iwl_debug_level & IWL_DL_TX) {
2200                 if (!priv->tx_traffic) {
2201                         priv->tx_traffic =
2202                                 kzalloc(traffic_size, GFP_KERNEL);
2203                         if (!priv->tx_traffic)
2204                                 return -ENOMEM;
2205                 }
2206         }
2207         if (iwl_debug_level & IWL_DL_RX) {
2208                 if (!priv->rx_traffic) {
2209                         priv->rx_traffic =
2210                                 kzalloc(traffic_size, GFP_KERNEL);
2211                         if (!priv->rx_traffic)
2212                                 return -ENOMEM;
2213                 }
2214         }
2215         iwl_reset_traffic_log(priv);
2216         return 0;
2217 }
2218 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2219
2220 void iwl_free_traffic_mem(struct iwl_priv *priv)
2221 {
2222         kfree(priv->tx_traffic);
2223         priv->tx_traffic = NULL;
2224
2225         kfree(priv->rx_traffic);
2226         priv->rx_traffic = NULL;
2227 }
2228 EXPORT_SYMBOL(iwl_free_traffic_mem);
2229
2230 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2231                       u16 length, struct ieee80211_hdr *header)
2232 {
2233         __le16 fc;
2234         u16 len;
2235
2236         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2237                 return;
2238
2239         if (!priv->tx_traffic)
2240                 return;
2241
2242         fc = header->frame_control;
2243         if (ieee80211_is_data(fc)) {
2244                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2245                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2246                 memcpy((priv->tx_traffic +
2247                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2248                        header, len);
2249                 priv->tx_traffic_idx =
2250                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2251         }
2252 }
2253 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2254
2255 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2256                       u16 length, struct ieee80211_hdr *header)
2257 {
2258         __le16 fc;
2259         u16 len;
2260
2261         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2262                 return;
2263
2264         if (!priv->rx_traffic)
2265                 return;
2266
2267         fc = header->frame_control;
2268         if (ieee80211_is_data(fc)) {
2269                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2270                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2271                 memcpy((priv->rx_traffic +
2272                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2273                        header, len);
2274                 priv->rx_traffic_idx =
2275                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2276         }
2277 }
2278 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2279
2280 const char *get_mgmt_string(int cmd)
2281 {
2282         switch (cmd) {
2283                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2284                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2285                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2286                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2287                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2288                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2289                 IWL_CMD(MANAGEMENT_BEACON);
2290                 IWL_CMD(MANAGEMENT_ATIM);
2291                 IWL_CMD(MANAGEMENT_DISASSOC);
2292                 IWL_CMD(MANAGEMENT_AUTH);
2293                 IWL_CMD(MANAGEMENT_DEAUTH);
2294                 IWL_CMD(MANAGEMENT_ACTION);
2295         default:
2296                 return "UNKNOWN";
2297
2298         }
2299 }
2300
2301 const char *get_ctrl_string(int cmd)
2302 {
2303         switch (cmd) {
2304                 IWL_CMD(CONTROL_BACK_REQ);
2305                 IWL_CMD(CONTROL_BACK);
2306                 IWL_CMD(CONTROL_PSPOLL);
2307                 IWL_CMD(CONTROL_RTS);
2308                 IWL_CMD(CONTROL_CTS);
2309                 IWL_CMD(CONTROL_ACK);
2310                 IWL_CMD(CONTROL_CFEND);
2311                 IWL_CMD(CONTROL_CFENDACK);
2312         default:
2313                 return "UNKNOWN";
2314
2315         }
2316 }
2317
2318 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2319 {
2320         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2321         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2322         priv->led_tpt = 0;
2323 }
2324
2325 /*
2326  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2327  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2328  * Use debugFs to display the rx/rx_statistics
2329  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2330  * information will be recorded, but DATA pkt still will be recorded
2331  * for the reason of iwl_led.c need to control the led blinking based on
2332  * number of tx and rx data.
2333  *
2334  */
2335 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2336 {
2337         struct traffic_stats    *stats;
2338
2339         if (is_tx)
2340                 stats = &priv->tx_stats;
2341         else
2342                 stats = &priv->rx_stats;
2343
2344         if (ieee80211_is_mgmt(fc)) {
2345                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2346                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2347                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2348                         break;
2349                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2350                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2351                         break;
2352                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2353                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2354                         break;
2355                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2356                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2357                         break;
2358                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2359                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2360                         break;
2361                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2362                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2363                         break;
2364                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2365                         stats->mgmt[MANAGEMENT_BEACON]++;
2366                         break;
2367                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2368                         stats->mgmt[MANAGEMENT_ATIM]++;
2369                         break;
2370                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2371                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2372                         break;
2373                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2374                         stats->mgmt[MANAGEMENT_AUTH]++;
2375                         break;
2376                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2377                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2378                         break;
2379                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2380                         stats->mgmt[MANAGEMENT_ACTION]++;
2381                         break;
2382                 }
2383         } else if (ieee80211_is_ctl(fc)) {
2384                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2385                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2386                         stats->ctrl[CONTROL_BACK_REQ]++;
2387                         break;
2388                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2389                         stats->ctrl[CONTROL_BACK]++;
2390                         break;
2391                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2392                         stats->ctrl[CONTROL_PSPOLL]++;
2393                         break;
2394                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2395                         stats->ctrl[CONTROL_RTS]++;
2396                         break;
2397                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2398                         stats->ctrl[CONTROL_CTS]++;
2399                         break;
2400                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2401                         stats->ctrl[CONTROL_ACK]++;
2402                         break;
2403                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2404                         stats->ctrl[CONTROL_CFEND]++;
2405                         break;
2406                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2407                         stats->ctrl[CONTROL_CFENDACK]++;
2408                         break;
2409                 }
2410         } else {
2411                 /* data */
2412                 stats->data_cnt++;
2413                 stats->data_bytes += len;
2414         }
2415         iwl_leds_background(priv);
2416 }
2417 EXPORT_SYMBOL(iwl_update_stats);
2418 #endif
2419
2420 const static char *get_csr_string(int cmd)
2421 {
2422         switch (cmd) {
2423                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2424                 IWL_CMD(CSR_INT_COALESCING);
2425                 IWL_CMD(CSR_INT);
2426                 IWL_CMD(CSR_INT_MASK);
2427                 IWL_CMD(CSR_FH_INT_STATUS);
2428                 IWL_CMD(CSR_GPIO_IN);
2429                 IWL_CMD(CSR_RESET);
2430                 IWL_CMD(CSR_GP_CNTRL);
2431                 IWL_CMD(CSR_HW_REV);
2432                 IWL_CMD(CSR_EEPROM_REG);
2433                 IWL_CMD(CSR_EEPROM_GP);
2434                 IWL_CMD(CSR_OTP_GP_REG);
2435                 IWL_CMD(CSR_GIO_REG);
2436                 IWL_CMD(CSR_GP_UCODE_REG);
2437                 IWL_CMD(CSR_GP_DRIVER_REG);
2438                 IWL_CMD(CSR_UCODE_DRV_GP1);
2439                 IWL_CMD(CSR_UCODE_DRV_GP2);
2440                 IWL_CMD(CSR_LED_REG);
2441                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2442                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2443                 IWL_CMD(CSR_ANA_PLL_CFG);
2444                 IWL_CMD(CSR_HW_REV_WA_REG);
2445                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2446         default:
2447                 return "UNKNOWN";
2448
2449         }
2450 }
2451
2452 void iwl_dump_csr(struct iwl_priv *priv)
2453 {
2454         int i;
2455         u32 csr_tbl[] = {
2456                 CSR_HW_IF_CONFIG_REG,
2457                 CSR_INT_COALESCING,
2458                 CSR_INT,
2459                 CSR_INT_MASK,
2460                 CSR_FH_INT_STATUS,
2461                 CSR_GPIO_IN,
2462                 CSR_RESET,
2463                 CSR_GP_CNTRL,
2464                 CSR_HW_REV,
2465                 CSR_EEPROM_REG,
2466                 CSR_EEPROM_GP,
2467                 CSR_OTP_GP_REG,
2468                 CSR_GIO_REG,
2469                 CSR_GP_UCODE_REG,
2470                 CSR_GP_DRIVER_REG,
2471                 CSR_UCODE_DRV_GP1,
2472                 CSR_UCODE_DRV_GP2,
2473                 CSR_LED_REG,
2474                 CSR_DRAM_INT_TBL_REG,
2475                 CSR_GIO_CHICKEN_BITS,
2476                 CSR_ANA_PLL_CFG,
2477                 CSR_HW_REV_WA_REG,
2478                 CSR_DBG_HPET_MEM_REG
2479         };
2480         IWL_ERR(priv, "CSR values:\n");
2481         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2482                 "CSR_INT_PERIODIC_REG)\n");
2483         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2484                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2485                         get_csr_string(csr_tbl[i]),
2486                         iwl_read32(priv, csr_tbl[i]));
2487         }
2488 }
2489 EXPORT_SYMBOL(iwl_dump_csr);
2490
2491 const static char *get_fh_string(int cmd)
2492 {
2493         switch (cmd) {
2494                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2495                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2496                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2497                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2498                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2499                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2500                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2501                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2502                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2503         default:
2504                 return "UNKNOWN";
2505
2506         }
2507 }
2508
2509 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2510 {
2511         int i;
2512 #ifdef CONFIG_IWLWIFI_DEBUG
2513         int pos = 0;
2514         size_t bufsz = 0;
2515 #endif
2516         u32 fh_tbl[] = {
2517                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2518                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2519                 FH_RSCSR_CHNL0_WPTR,
2520                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2521                 FH_MEM_RSSR_SHARED_CTRL_REG,
2522                 FH_MEM_RSSR_RX_STATUS_REG,
2523                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2524                 FH_TSSR_TX_STATUS_REG,
2525                 FH_TSSR_TX_ERROR_REG
2526         };
2527 #ifdef CONFIG_IWLWIFI_DEBUG
2528         if (display) {
2529                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2530                 *buf = kmalloc(bufsz, GFP_KERNEL);
2531                 if (!*buf)
2532                         return -ENOMEM;
2533                 pos += scnprintf(*buf + pos, bufsz - pos,
2534                                 "FH register values:\n");
2535                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2536                         pos += scnprintf(*buf + pos, bufsz - pos,
2537                                 "  %34s: 0X%08x\n",
2538                                 get_fh_string(fh_tbl[i]),
2539                                 iwl_read_direct32(priv, fh_tbl[i]));
2540                 }
2541                 return pos;
2542         }
2543 #endif
2544         IWL_ERR(priv, "FH register values:\n");
2545         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2546                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2547                         get_fh_string(fh_tbl[i]),
2548                         iwl_read_direct32(priv, fh_tbl[i]));
2549         }
2550         return 0;
2551 }
2552 EXPORT_SYMBOL(iwl_dump_fh);
2553
2554 static void iwl_force_rf_reset(struct iwl_priv *priv)
2555 {
2556         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2557                 return;
2558
2559         if (!iwl_is_associated(priv)) {
2560                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2561                 return;
2562         }
2563         /*
2564          * There is no easy and better way to force reset the radio,
2565          * the only known method is switching channel which will force to
2566          * reset and tune the radio.
2567          * Use internal short scan (single channel) operation to should
2568          * achieve this objective.
2569          * Driver should reset the radio when number of consecutive missed
2570          * beacon, or any other uCode error condition detected.
2571          */
2572         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2573         iwl_internal_short_hw_scan(priv);
2574 }
2575
2576
2577 int iwl_force_reset(struct iwl_priv *priv, int mode)
2578 {
2579         struct iwl_force_reset *force_reset;
2580
2581         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2582                 return -EINVAL;
2583
2584         if (mode >= IWL_MAX_FORCE_RESET) {
2585                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2586                 return -EINVAL;
2587         }
2588         force_reset = &priv->force_reset[mode];
2589         force_reset->reset_request_count++;
2590         if (force_reset->last_force_reset_jiffies &&
2591             time_after(force_reset->last_force_reset_jiffies +
2592             force_reset->reset_duration, jiffies)) {
2593                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2594                 force_reset->reset_reject_count++;
2595                 return -EAGAIN;
2596         }
2597         force_reset->reset_success_count++;
2598         force_reset->last_force_reset_jiffies = jiffies;
2599         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2600         switch (mode) {
2601         case IWL_RF_RESET:
2602                 iwl_force_rf_reset(priv);
2603                 break;
2604         case IWL_FW_RESET:
2605                 IWL_ERR(priv, "On demand firmware reload\n");
2606                 /* Set the FW error flag -- cleared on iwl_down */
2607                 set_bit(STATUS_FW_ERROR, &priv->status);
2608                 wake_up_interruptible(&priv->wait_command_queue);
2609                 /*
2610                  * Keep the restart process from trying to send host
2611                  * commands by clearing the INIT status bit
2612                  */
2613                 clear_bit(STATUS_READY, &priv->status);
2614                 queue_work(priv->workqueue, &priv->restart);
2615                 break;
2616         }
2617         return 0;
2618 }
2619 EXPORT_SYMBOL(iwl_force_reset);
2620
2621 /**
2622  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2623  *
2624  * During normal condition (no queue is stuck), the timer is continually set to
2625  * execute every monitor_recover_period milliseconds after the last timer
2626  * expired.  When the queue read_ptr is at the same place, the timer is
2627  * shorten to 100mSecs.  This is
2628  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2629  *      2) to detect the stuck queues quicker before the station and AP can
2630  *      disassociate each other.
2631  *
2632  * This function monitors all the tx queues and recover from it if any
2633  * of the queues are stuck.
2634  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2635  *      it will recover by resetting the firmware and return.
2636  * 2. Then, it checks for station association.  If it associates it will check
2637  *      other queues.  If any queue is stuck, it will recover by resetting
2638  *      the firmware.
2639  * Note: It the number of times the queue read_ptr to be at the same place to
2640  *      be MAX_REPEAT+1 in order to consider to be stuck.
2641  */
2642 /*
2643  * The maximum number of times the read pointer of the tx queue at the
2644  * same place without considering to be stuck.
2645  */
2646 #define MAX_REPEAT      (2)
2647 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2648 {
2649         struct iwl_tx_queue *txq;
2650         struct iwl_queue *q;
2651
2652         txq = &priv->txq[cnt];
2653         q = &txq->q;
2654         /* queue is empty, skip */
2655         if (q->read_ptr != q->write_ptr) {
2656                 if (q->read_ptr == q->last_read_ptr) {
2657                         /* a queue has not been read from last time */
2658                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2659                                 IWL_ERR(priv,
2660                                         "queue %d stuck %d time. Fw reload.\n",
2661                                         q->id, q->repeat_same_read_ptr);
2662                                 q->repeat_same_read_ptr = 0;
2663                                 iwl_force_reset(priv, IWL_FW_RESET);
2664                         } else {
2665                                 q->repeat_same_read_ptr++;
2666                                 IWL_DEBUG_RADIO(priv,
2667                                                 "queue %d, not read %d time\n",
2668                                                 q->id,
2669                                                 q->repeat_same_read_ptr);
2670                                 mod_timer(&priv->monitor_recover, jiffies +
2671                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2672                         }
2673                         return 1;
2674                 } else {
2675                         q->last_read_ptr = q->read_ptr;
2676                         q->repeat_same_read_ptr = 0;
2677                 }
2678         }
2679         return 0;
2680 }
2681
2682 void iwl_bg_monitor_recover(unsigned long data)
2683 {
2684         struct iwl_priv *priv = (struct iwl_priv *)data;
2685         int cnt;
2686
2687         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2688                 return;
2689
2690         /* monitor and check for stuck cmd queue */
2691         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2692                 return;
2693
2694         /* monitor and check for other stuck queues */
2695         if (iwl_is_associated(priv)) {
2696                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2697                         /* skip as we already checked the command queue */
2698                         if (cnt == IWL_CMD_QUEUE_NUM)
2699                                 continue;
2700                         if (iwl_check_stuck_queue(priv, cnt))
2701                                 return;
2702                 }
2703         }
2704         /*
2705          * Reschedule the timer to occur in
2706          * priv->cfg->monitor_recover_period
2707          */
2708         mod_timer(&priv->monitor_recover,
2709                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2710 }
2711 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2712
2713 #ifdef CONFIG_PM
2714
2715 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2716 {
2717         struct iwl_priv *priv = pci_get_drvdata(pdev);
2718
2719         /*
2720          * This function is called when system goes into suspend state
2721          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2722          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2723          * it will not call apm_ops.stop() to stop the DMA operation.
2724          * Calling apm_ops.stop here to make sure we stop the DMA.
2725          */
2726         priv->cfg->ops->lib->apm_ops.stop(priv);
2727
2728         pci_save_state(pdev);
2729         pci_disable_device(pdev);
2730         pci_set_power_state(pdev, PCI_D3hot);
2731
2732         return 0;
2733 }
2734 EXPORT_SYMBOL(iwl_pci_suspend);
2735
2736 int iwl_pci_resume(struct pci_dev *pdev)
2737 {
2738         struct iwl_priv *priv = pci_get_drvdata(pdev);
2739         int ret;
2740
2741         /*
2742          * We disable the RETRY_TIMEOUT register (0x41) to keep
2743          * PCI Tx retries from interfering with C3 CPU state.
2744          */
2745         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2746
2747         pci_set_power_state(pdev, PCI_D0);
2748         ret = pci_enable_device(pdev);
2749         if (ret)
2750                 return ret;
2751         pci_restore_state(pdev);
2752         iwl_enable_interrupts(priv);
2753
2754         return 0;
2755 }
2756 EXPORT_SYMBOL(iwl_pci_resume);
2757
2758 #endif /* CONFIG_PM */