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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <net/mac80211.h>
  35
  36 #include "iwl-eeprom.h"
  37 #include "iwl-dev.h" /* FIXME: remove */
  38 #include "iwl-debug.h"
  39 #include "iwl-core.h"
  40 #include "iwl-io.h"
  41 #include "iwl-power.h"
  42 #include "iwl-sta.h"
  43 #include "iwl-helpers.h"
  44
  45
  46 MODULE_DESCRIPTION("iwl core");
  47 MODULE_VERSION(IWLWIFI_VERSION);
  48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * set bt_coex_active to true, uCode will do kill/defer
  53  * every time the priority line is asserted (BT is sending signals on the
  54  * priority line in the PCIx).
  55  * set bt_coex_active to false, uCode will ignore the BT activity and
  56  * perform the normal operation
  57  *
  58  * User might experience transmit issue on some platform due to WiFi/BT
  59  * co-exist problem. The possible behaviors are:
  60  *   Able to scan and finding all the available AP
  61  *   Not able to associate with any AP
  62  * On those platforms, WiFi communication can be restored by set
  63  * "bt_coex_active" module parameter to "false"
  64  *
  65  * default: bt_coex_active = true (BT_COEX_ENABLE)
  66  */
  67 static bool bt_coex_active = true;
  68 module_param(bt_coex_active, bool, S_IRUGO);
  69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  70
  71 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  72         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  73                                     IWL_RATE_SISO_##s##M_PLCP, \
  74                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  75                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  76                                     IWL_RATE_##r##M_IEEE,      \
  77                                     IWL_RATE_##ip##M_INDEX,    \
  78                                     IWL_RATE_##in##M_INDEX,    \
  79                                     IWL_RATE_##rp##M_INDEX,    \
  80                                     IWL_RATE_##rn##M_INDEX,    \
  81                                     IWL_RATE_##pp##M_INDEX,    \
  82                                     IWL_RATE_##np##M_INDEX }
  83
  84 u32 iwl_debug_level;
  85 EXPORT_SYMBOL(iwl_debug_level);
  86
  87 /*
  88  * Parameter order:
  89  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  90  *
  91  * If there isn't a valid next or previous rate then INV is used which
  92  * maps to IWL_RATE_INVALID
  93  *
  94  */
  95 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  96         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  97         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  98         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  99         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 100         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 101         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 102         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 103         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 104         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 105         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 106         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 107         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 108         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 109         /* FIXME:RS:          ^^    should be INV (legacy) */
 110 };
 111 EXPORT_SYMBOL(iwl_rates);
 112
 113 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 114 {
 115         int idx = 0;
 116
 117         /* HT rate format */
 118         if (rate_n_flags & RATE_MCS_HT_MSK) {
 119                 idx = (rate_n_flags & 0xff);
 120
 121                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 122                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 123                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 124                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 125
 126                 idx += IWL_FIRST_OFDM_RATE;
 127                 /* skip 9M not supported in ht*/
 128                 if (idx >= IWL_RATE_9M_INDEX)
 129                         idx += 1;
 130                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 131                         return idx;
 132
 133         /* legacy rate format, search for match in table */
 134         } else {
 135                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 136                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 137                                 return idx;
 138         }
 139
 140         return -1;
 141 }
 142 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 143
 144 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 145 {
 146         int i;
 147         u8 ind = ant;
 148         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 149                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 150                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 151                         return ind;
 152         }
 153         return ant;
 154 }
 155 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 156
 157 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 158 EXPORT_SYMBOL(iwl_bcast_addr);
 159
 160
 161 /* This function both allocates and initializes hw and priv. */
 162 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 163                 struct ieee80211_ops *hw_ops)
 164 {
 165         struct iwl_priv *priv;
 166
 167         /* mac80211 allocates memory for this device instance, including
 168          *   space for this driver's private structure */
 169         struct ieee80211_hw *hw =
 170                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 171         if (hw == NULL) {
 172                 printk(KERN_ERR "%s: Can not allocate network device\n",
 173                        cfg->name);
 174                 goto out;
 175         }
 176
 177         priv = hw->priv;
 178         priv->hw = hw;
 179
 180 out:
 181         return hw;
 182 }
 183 EXPORT_SYMBOL(iwl_alloc_all);
 184
 185 void iwl_hw_detect(struct iwl_priv *priv)
 186 {
 187         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 188         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 189         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 190 }
 191 EXPORT_SYMBOL(iwl_hw_detect);
 192
 193 /*
 194  * QoS  support
 195 */
 196 static void iwl_update_qos(struct iwl_priv *priv)
 197 {
 198         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 199                 return;
 200
 201         priv->qos_data.def_qos_parm.qos_flags = 0;
 202
 203         if (priv->qos_data.qos_active)
 204                 priv->qos_data.def_qos_parm.qos_flags |=
 205                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 206
 207         if (priv->current_ht_config.is_ht)
 208                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 209
 210         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 211                       priv->qos_data.qos_active,
 212                       priv->qos_data.def_qos_parm.qos_flags);
 213
 214         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 215                                sizeof(struct iwl_qosparam_cmd),
 216                                &priv->qos_data.def_qos_parm, NULL);
 217 }
 218
 219 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 220 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 221 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 222                               struct ieee80211_sta_ht_cap *ht_info,
 223                               enum ieee80211_band band)
 224 {
 225         u16 max_bit_rate = 0;
 226         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 227         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 228
 229         ht_info->cap = 0;
 230         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 231
 232         ht_info->ht_supported = true;
 233
 234         if (priv->cfg->ht_greenfield_support)
 235                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 236         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 237         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 238         if (priv->hw_params.ht40_channel & BIT(band)) {
 239                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 240                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 241                 ht_info->mcs.rx_mask[4] = 0x01;
 242                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 243         }
 244
 245         if (priv->cfg->mod_params->amsdu_size_8K)
 246                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 247
 248         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 249         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 250
 251         ht_info->mcs.rx_mask[0] = 0xFF;
 252         if (rx_chains_num >= 2)
 253                 ht_info->mcs.rx_mask[1] = 0xFF;
 254         if (rx_chains_num >= 3)
 255                 ht_info->mcs.rx_mask[2] = 0xFF;
 256
 257         /* Highest supported Rx data rate */
 258         max_bit_rate *= rx_chains_num;
 259         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 260         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 261
 262         /* Tx MCS capabilities */
 263         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 264         if (tx_chains_num != rx_chains_num) {
 265                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 266                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 267                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 268         }
 269 }
 270
 271 /**
 272  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 273  */
 274 int iwlcore_init_geos(struct iwl_priv *priv)
 275 {
 276         struct iwl_channel_info *ch;
 277         struct ieee80211_supported_band *sband;
 278         struct ieee80211_channel *channels;
 279         struct ieee80211_channel *geo_ch;
 280         struct ieee80211_rate *rates;
 281         int i = 0;
 282
 283         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 284             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 285                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 286                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 287                 return 0;
 288         }
 289
 290         channels = kzalloc(sizeof(struct ieee80211_channel) *
 291                            priv->channel_count, GFP_KERNEL);
 292         if (!channels)
 293                 return -ENOMEM;
 294
 295         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 296                         GFP_KERNEL);
 297         if (!rates) {
 298                 kfree(channels);
 299                 return -ENOMEM;
 300         }
 301
 302         /* 5.2GHz channels start after the 2.4GHz channels */
 303         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 304         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 305         /* just OFDM */
 306         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 307         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 308
 309         if (priv->cfg->sku & IWL_SKU_N)
 310                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 311                                          IEEE80211_BAND_5GHZ);
 312
 313         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 314         sband->channels = channels;
 315         /* OFDM & CCK */
 316         sband->bitrates = rates;
 317         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 318
 319         if (priv->cfg->sku & IWL_SKU_N)
 320                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 321                                          IEEE80211_BAND_2GHZ);
 322
 323         priv->ieee_channels = channels;
 324         priv->ieee_rates = rates;
 325
 326         for (i = 0;  i < priv->channel_count; i++) {
 327                 ch = &priv->channel_info[i];
 328
 329                 /* FIXME: might be removed if scan is OK */
 330                 if (!is_channel_valid(ch))
 331                         continue;
 332
 333                 if (is_channel_a_band(ch))
 334                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 335                 else
 336                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 337
 338                 geo_ch = &sband->channels[sband->n_channels++];
 339
 340                 geo_ch->center_freq =
 341                                 ieee80211_channel_to_frequency(ch->channel);
 342                 geo_ch->max_power = ch->max_power_avg;
 343                 geo_ch->max_antenna_gain = 0xff;
 344                 geo_ch->hw_value = ch->channel;
 345
 346                 if (is_channel_valid(ch)) {
 347                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 348                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 349
 350                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 351                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 352
 353                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 354                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 355
 356                         geo_ch->flags |= ch->ht40_extension_channel;
 357
 358                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 359                                 priv->tx_power_device_lmt = ch->max_power_avg;
 360                 } else {
 361                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 362                 }
 363
 364                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 365                                 ch->channel, geo_ch->center_freq,
 366                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 367                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 368                                 "restricted" : "valid",
 369                                  geo_ch->flags);
 370         }
 371
 372         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 373              priv->cfg->sku & IWL_SKU_A) {
 374                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 375                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 376                            priv->pci_dev->device,
 377                            priv->pci_dev->subsystem_device);
 378                 priv->cfg->sku &= ~IWL_SKU_A;
 379         }
 380
 381         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 382                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 383                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 384
 385         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 386
 387         return 0;
 388 }
 389 EXPORT_SYMBOL(iwlcore_init_geos);
 390
 391 /*
 392  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 393  */
 394 void iwlcore_free_geos(struct iwl_priv *priv)
 395 {
 396         kfree(priv->ieee_channels);
 397         kfree(priv->ieee_rates);
 398         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 399 }
 400 EXPORT_SYMBOL(iwlcore_free_geos);
 401
 402 /*
 403  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 404  *  function.
 405  */
 406 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 407                                 __le32 *tx_flags)
 408 {
 409         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 410                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 411                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 412         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 413                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 414                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 415         }
 416 }
 417 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 418
 419 static bool is_single_rx_stream(struct iwl_priv *priv)
 420 {
 421         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 422                priv->current_ht_config.single_chain_sufficient;
 423 }
 424
 425 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 426                                    enum ieee80211_band band,
 427                                    u16 channel, u8 extension_chan_offset)
 428 {
 429         const struct iwl_channel_info *ch_info;
 430
 431         ch_info = iwl_get_channel_info(priv, band, channel);
 432         if (!is_channel_valid(ch_info))
 433                 return 0;
 434
 435         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 436                 return !(ch_info->ht40_extension_channel &
 437                                         IEEE80211_CHAN_NO_HT40PLUS);
 438         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 439                 return !(ch_info->ht40_extension_channel &
 440                                         IEEE80211_CHAN_NO_HT40MINUS);
 441
 442         return 0;
 443 }
 444
 445 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 446                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 447 {
 448         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 449
 450         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 451                 return 0;
 452
 453         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 454          * the bit will not set if it is pure 40MHz case
 455          */
 456         if (sta_ht_inf) {
 457                 if (!sta_ht_inf->ht_supported)
 458                         return 0;
 459         }
 460 #ifdef CONFIG_IWLWIFI_DEBUG
 461         if (priv->disable_ht40)
 462                 return 0;
 463 #endif
 464         return iwl_is_channel_extension(priv, priv->band,
 465                         le16_to_cpu(priv->staging_rxon.channel),
 466                         ht_conf->extension_chan_offset);
 467 }
 468 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 469
 470 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 471 {
 472         u16 new_val = 0;
 473         u16 beacon_factor = 0;
 474
 475         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 476         new_val = beacon_val / beacon_factor;
 477
 478         if (!new_val)
 479                 new_val = max_beacon_val;
 480
 481         return new_val;
 482 }
 483
 484 void iwl_setup_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif)
 485 {
 486         u64 tsf;
 487         s32 interval_tm, rem;
 488         unsigned long flags;
 489         struct ieee80211_conf *conf = NULL;
 490         u16 beacon_int;
 491
 492         conf = ieee80211_get_hw_conf(priv->hw);
 493
 494         spin_lock_irqsave(&priv->lock, flags);
 495         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 496         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 497
 498         beacon_int = vif->bss_conf.beacon_int;
 499
 500         if (vif->type == NL80211_IFTYPE_ADHOC) {
 501                 /* TODO: we need to get atim_window from upper stack
 502                  * for now we set to 0 */
 503                 priv->rxon_timing.atim_window = 0;
 504         } else {
 505                 priv->rxon_timing.atim_window = 0;
 506         }
 507
 508         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 509                                 priv->hw_params.max_beacon_itrvl * 1024);
 510         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 511
 512         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 513         interval_tm = beacon_int * 1024;
 514         rem = do_div(tsf, interval_tm);
 515         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518         IWL_DEBUG_ASSOC(priv,
 519                         "beacon interval %d beacon timer %d beacon tim %d\n",
 520                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 521                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 522                         le16_to_cpu(priv->rxon_timing.atim_window));
 523 }
 524 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 525
 526 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 527 {
 528         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 529
 530         if (hw_decrypt)
 531                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 532         else
 533                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 534
 535 }
 536 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 537
 538 /**
 539  * iwl_check_rxon_cmd - validate RXON structure is valid
 540  *
 541  * NOTE:  This is really only useful during development and can eventually
 542  * be #ifdef'd out once the driver is stable and folks aren't actively
 543  * making changes
 544  */
 545 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 546 {
 547         int error = 0;
 548         int counter = 1;
 549         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 550
 551         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 552                 error |= le32_to_cpu(rxon->flags &
 553                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 554                                  RXON_FLG_RADAR_DETECT_MSK));
 555                 if (error)
 556                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 557                                     counter++, error);
 558         } else {
 559                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 560                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 561                 if (error)
 562                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 563                                     counter++, error);
 564                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 565                 if (error)
 566                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 567                                     counter++, error);
 568         }
 569         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 570         if (error)
 571                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 572
 573         /* make sure basic rates 6Mbps and 1Mbps are supported */
 574         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 575                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 576         if (error)
 577                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 578
 579         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 580         if (error)
 581                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 582
 583         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 584                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 585         if (error)
 586                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 587                             counter++, error);
 588
 589         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 590                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 591         if (error)
 592                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 593                             counter++, error);
 594
 595         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 596                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 597         if (error)
 598                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 599                             counter++, error);
 600
 601         if (error)
 602                 IWL_WARN(priv, "Tuning to channel %d\n",
 603                             le16_to_cpu(rxon->channel));
 604
 605         if (error) {
 606                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 607                 return -1;
 608         }
 609         return 0;
 610 }
 611 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 612
 613 /**
 614  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 615  * @priv: staging_rxon is compared to active_rxon
 616  *
 617  * If the RXON structure is changing enough to require a new tune,
 618  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 619  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 620  */
 621 int iwl_full_rxon_required(struct iwl_priv *priv)
 622 {
 623
 624         /* These items are only settable from the full RXON command */
 625         if (!(iwl_is_associated(priv)) ||
 626             compare_ether_addr(priv->staging_rxon.bssid_addr,
 627                                priv->active_rxon.bssid_addr) ||
 628             compare_ether_addr(priv->staging_rxon.node_addr,
 629                                priv->active_rxon.node_addr) ||
 630             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 631                                priv->active_rxon.wlap_bssid_addr) ||
 632             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 633             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 634             (priv->staging_rxon.air_propagation !=
 635              priv->active_rxon.air_propagation) ||
 636             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 637              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 638             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 639              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 640             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 641              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 642             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 643                 return 1;
 644
 645         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 646          * be updated with the RXON_ASSOC command -- however only some
 647          * flag transitions are allowed using RXON_ASSOC */
 648
 649         /* Check if we are not switching bands */
 650         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 651             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 652                 return 1;
 653
 654         /* Check if we are switching association toggle */
 655         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 656                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 657                 return 1;
 658
 659         return 0;
 660 }
 661 EXPORT_SYMBOL(iwl_full_rxon_required);
 662
 663 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 664 {
 665         /*
 666          * Assign the lowest rate -- should really get this from
 667          * the beacon skb from mac80211.
 668          */
 669         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 670                 return IWL_RATE_1M_PLCP;
 671         else
 672                 return IWL_RATE_6M_PLCP;
 673 }
 674 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 675
 676 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 677 {
 678         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 679
 680         if (!ht_conf->is_ht) {
 681                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 682                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 683                         RXON_FLG_HT40_PROT_MSK |
 684                         RXON_FLG_HT_PROT_MSK);
 685                 return;
 686         }
 687
 688         /* FIXME: if the definition of ht_protection changed, the "translation"
 689          * will be needed for rxon->flags
 690          */
 691         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 692
 693         /* Set up channel bandwidth:
 694          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 695         /* clear the HT channel mode before set the mode */
 696         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 697                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 698         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 699                 /* pure ht40 */
 700                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 701                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 702                         /* Note: control channel is opposite of extension channel */
 703                         switch (ht_conf->extension_chan_offset) {
 704                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 705                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 706                                 break;
 707                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 708                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 709                                 break;
 710                         }
 711                 } else {
 712                         /* Note: control channel is opposite of extension channel */
 713                         switch (ht_conf->extension_chan_offset) {
 714                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 715                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 716                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 717                                 break;
 718                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 719                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 720                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 721                                 break;
 722                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 723                         default:
 724                                 /* channel location only valid if in Mixed mode */
 725                                 IWL_ERR(priv, "invalid extension channel offset\n");
 726                                 break;
 727                         }
 728                 }
 729         } else {
 730                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 731         }
 732
 733         if (priv->cfg->ops->hcmd->set_rxon_chain)
 734                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 735
 736         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 737                         "extension channel offset 0x%x\n",
 738                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 739                         ht_conf->extension_chan_offset);
 740 }
 741 EXPORT_SYMBOL(iwl_set_rxon_ht);
 742
 743 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 744 #define IWL_NUM_RX_CHAINS_SINGLE        2
 745 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 746 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 747
 748 /*
 749  * Determine how many receiver/antenna chains to use.
 750  *
 751  * More provides better reception via diversity.  Fewer saves power
 752  * at the expense of throughput, but only when not in powersave to
 753  * start with.
 754  *
 755  * MIMO (dual stream) requires at least 2, but works better with 3.
 756  * This does not determine *which* chains to use, just how many.
 757  */
 758 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 759 {
 760         /* # of Rx chains to use when expecting MIMO. */
 761         if (is_single_rx_stream(priv))
 762                 return IWL_NUM_RX_CHAINS_SINGLE;
 763         else
 764                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 765 }
 766
 767 /*
 768  * When we are in power saving mode, unless device support spatial
 769  * multiplexing power save, use the active count for rx chain count.
 770  */
 771 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 772 {
 773         /* # Rx chains when idling, depending on SMPS mode */
 774         switch (priv->current_ht_config.smps) {
 775         case IEEE80211_SMPS_STATIC:
 776         case IEEE80211_SMPS_DYNAMIC:
 777                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 778         case IEEE80211_SMPS_OFF:
 779                 return active_cnt;
 780         default:
 781                 WARN(1, "invalid SMPS mode %d",
 782                      priv->current_ht_config.smps);
 783                 return active_cnt;
 784         }
 785 }
 786
 787 /* up to 4 chains */
 788 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 789 {
 790         u8 res;
 791         res = (chain_bitmap & BIT(0)) >> 0;
 792         res += (chain_bitmap & BIT(1)) >> 1;
 793         res += (chain_bitmap & BIT(2)) >> 2;
 794         res += (chain_bitmap & BIT(3)) >> 3;
 795         return res;
 796 }
 797
 798 /**
 799  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 800  *
 801  * Selects how many and which Rx receivers/antennas/chains to use.
 802  * This should not be used for scan command ... it puts data in wrong place.
 803  */
 804 void iwl_set_rxon_chain(struct iwl_priv *priv)
 805 {
 806         bool is_single = is_single_rx_stream(priv);
 807         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 808         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 809         u32 active_chains;
 810         u16 rx_chain;
 811
 812         /* Tell uCode which antennas are actually connected.
 813          * Before first association, we assume all antennas are connected.
 814          * Just after first association, iwl_chain_noise_calibration()
 815          *    checks which antennas actually *are* connected. */
 816          if (priv->chain_noise_data.active_chains)
 817                 active_chains = priv->chain_noise_data.active_chains;
 818         else
 819                 active_chains = priv->hw_params.valid_rx_ant;
 820
 821         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 822
 823         /* How many receivers should we use? */
 824         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 825         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 826
 827
 828         /* correct rx chain count according hw settings
 829          * and chain noise calibration
 830          */
 831         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 832         if (valid_rx_cnt < active_rx_cnt)
 833                 active_rx_cnt = valid_rx_cnt;
 834
 835         if (valid_rx_cnt < idle_rx_cnt)
 836                 idle_rx_cnt = valid_rx_cnt;
 837
 838         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 839         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 840
 841         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 842
 843         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 844                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 845         else
 846                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 847
 848         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 849                         priv->staging_rxon.rx_chain,
 850                         active_rx_cnt, idle_rx_cnt);
 851
 852         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 853                 active_rx_cnt < idle_rx_cnt);
 854 }
 855 EXPORT_SYMBOL(iwl_set_rxon_chain);
 856
 857 /* Return valid channel */
 858 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 859                                   enum ieee80211_band band)
 860 {
 861         const struct iwl_channel_info *ch_info;
 862         int i;
 863         u8 channel = 0;
 864
 865         /* only scan single channel, good enough to reset the RF */
 866         /* pick the first valid not in-use channel */
 867         if (band == IEEE80211_BAND_5GHZ) {
 868                 for (i = 14; i < priv->channel_count; i++) {
 869                         if (priv->channel_info[i].channel !=
 870                             le16_to_cpu(priv->staging_rxon.channel)) {
 871                                 channel = priv->channel_info[i].channel;
 872                                 ch_info = iwl_get_channel_info(priv,
 873                                         band, channel);
 874                                 if (is_channel_valid(ch_info))
 875                                         break;
 876                         }
 877                 }
 878         } else {
 879                 for (i = 0; i < 14; i++) {
 880                         if (priv->channel_info[i].channel !=
 881                             le16_to_cpu(priv->staging_rxon.channel)) {
 882                                         channel =
 883                                                 priv->channel_info[i].channel;
 884                                         ch_info = iwl_get_channel_info(priv,
 885                                                 band, channel);
 886                                         if (is_channel_valid(ch_info))
 887                                                 break;
 888                         }
 889                 }
 890         }
 891
 892         return channel;
 893 }
 894 EXPORT_SYMBOL(iwl_get_single_channel_number);
 895
 896 /**
 897  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 898  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 899  * @channel: Any channel valid for the requested phymode
 900
 901  * In addition to setting the staging RXON, priv->phymode is also set.
 902  *
 903  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 904  * in the staging RXON flag structure based on the phymode
 905  */
 906 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 907 {
 908         enum ieee80211_band band = ch->band;
 909         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 910
 911         if (!iwl_get_channel_info(priv, band, channel)) {
 912                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 913                                channel, band);
 914                 return -EINVAL;
 915         }
 916
 917         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 918             (priv->band == band))
 919                 return 0;
 920
 921         priv->staging_rxon.channel = cpu_to_le16(channel);
 922         if (band == IEEE80211_BAND_5GHZ)
 923                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 924         else
 925                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 926
 927         priv->band = band;
 928
 929         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 930
 931         return 0;
 932 }
 933 EXPORT_SYMBOL(iwl_set_rxon_channel);
 934
 935 static void iwl_set_flags_for_band(struct iwl_priv *priv,
 936                                    enum ieee80211_band band,
 937                                    struct ieee80211_vif *vif)
 938 {
 939         if (band == IEEE80211_BAND_5GHZ) {
 940                 priv->staging_rxon.flags &=
 941                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 942                       | RXON_FLG_CCK_MSK);
 943                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 944         } else {
 945                 /* Copied from iwl_post_associate() */
 946                 if (vif && vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 947                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 948                 else
 949                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 950
 951                 if (vif && vif->type == NL80211_IFTYPE_ADHOC)
 952                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 953
 954                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 955                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 956                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 957         }
 958 }
 959
 960 /*
 961  * initialize rxon structure with default values from eeprom
 962  */
 963 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 964                                    struct ieee80211_vif *vif)
 965 {
 966         const struct iwl_channel_info *ch_info;
 967         enum nl80211_iftype type = NL80211_IFTYPE_STATION;
 968
 969         if (vif)
 970                 type = vif->type;
 971
 972         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 973
 974         switch (type) {
 975         case NL80211_IFTYPE_AP:
 976                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 977                 break;
 978
 979         case NL80211_IFTYPE_STATION:
 980                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 981                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 982                 break;
 983
 984         case NL80211_IFTYPE_ADHOC:
 985                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 986                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 987                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 988                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 989                 break;
 990
 991         default:
 992                 IWL_ERR(priv, "Unsupported interface type %d\n", type);
 993                 break;
 994         }
 995
 996 #if 0
 997         /* TODO:  Figure out when short_preamble would be set and cache from
 998          * that */
 999         if (!hw_to_local(priv->hw)->short_preamble)
1000                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1001         else
1002                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1003 #endif
1004
1005         ch_info = iwl_get_channel_info(priv, priv->band,
1006                                        le16_to_cpu(priv->active_rxon.channel));
1007
1008         if (!ch_info)
1009                 ch_info = &priv->channel_info[0];
1010
1011         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1012         priv->band = ch_info->band;
1013
1014         iwl_set_flags_for_band(priv, priv->band, vif);
1015
1016         priv->staging_rxon.ofdm_basic_rates =
1017             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1018         priv->staging_rxon.cck_basic_rates =
1019             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1020
1021         /* clear both MIX and PURE40 mode flag */
1022         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1023                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1024         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1025         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1026         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1027         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1028         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1029 }
1030 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1031
1032 static void iwl_set_rate(struct iwl_priv *priv)
1033 {
1034         const struct ieee80211_supported_band *hw = NULL;
1035         struct ieee80211_rate *rate;
1036         int i;
1037
1038         hw = iwl_get_hw_mode(priv, priv->band);
1039         if (!hw) {
1040                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1041                 return;
1042         }
1043
1044         priv->active_rate = 0;
1045
1046         for (i = 0; i < hw->n_bitrates; i++) {
1047                 rate = &(hw->bitrates[i]);
1048                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1049                         priv->active_rate |= (1 << rate->hw_value);
1050         }
1051
1052         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1053
1054         priv->staging_rxon.cck_basic_rates =
1055             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1056
1057         priv->staging_rxon.ofdm_basic_rates =
1058            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1059 }
1060
1061 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1062 {
1063         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1064         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1065         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1066
1067         if (priv->switch_rxon.switch_in_progress) {
1068                 if (!le32_to_cpu(csa->status) &&
1069                     (csa->channel == priv->switch_rxon.channel)) {
1070                         rxon->channel = csa->channel;
1071                         priv->staging_rxon.channel = csa->channel;
1072                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1073                               le16_to_cpu(csa->channel));
1074                 } else
1075                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1076                               le16_to_cpu(csa->channel));
1077
1078                 priv->switch_rxon.switch_in_progress = false;
1079         }
1080 }
1081 EXPORT_SYMBOL(iwl_rx_csa);
1082
1083 #ifdef CONFIG_IWLWIFI_DEBUG
1084 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1085 {
1086         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1087
1088         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1089         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1090         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1091         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1092         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1093                         le32_to_cpu(rxon->filter_flags));
1094         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1095         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1096                         rxon->ofdm_basic_rates);
1097         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1098         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1099         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1100         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1101 }
1102 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1103 #endif
1104 /**
1105  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1106  */
1107 void iwl_irq_handle_error(struct iwl_priv *priv)
1108 {
1109         /* Set the FW error flag -- cleared on iwl_down */
1110         set_bit(STATUS_FW_ERROR, &priv->status);
1111
1112         /* Cancel currently queued command. */
1113         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1114
1115         IWL_ERR(priv, "Loaded firmware version: %s\n",
1116                 priv->hw->wiphy->fw_version);
1117
1118         priv->cfg->ops->lib->dump_nic_error_log(priv);
1119         if (priv->cfg->ops->lib->dump_csr)
1120                 priv->cfg->ops->lib->dump_csr(priv);
1121         if (priv->cfg->ops->lib->dump_fh)
1122                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1123         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1124 #ifdef CONFIG_IWLWIFI_DEBUG
1125         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1126                 iwl_print_rx_config_cmd(priv);
1127 #endif
1128
1129         wake_up_interruptible(&priv->wait_command_queue);
1130
1131         /* Keep the restart process from trying to send host
1132          * commands by clearing the INIT status bit */
1133         clear_bit(STATUS_READY, &priv->status);
1134
1135         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1136                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1137                           "Restarting adapter due to uCode error.\n");
1138
1139                 if (priv->cfg->mod_params->restart_fw)
1140                         queue_work(priv->workqueue, &priv->restart);
1141         }
1142 }
1143 EXPORT_SYMBOL(iwl_irq_handle_error);
1144
1145 static int iwl_apm_stop_master(struct iwl_priv *priv)
1146 {
1147         int ret = 0;
1148
1149         /* stop device's busmaster DMA activity */
1150         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1151
1152         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1153                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1154         if (ret)
1155                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1156
1157         IWL_DEBUG_INFO(priv, "stop master\n");
1158
1159         return ret;
1160 }
1161
1162 void iwl_apm_stop(struct iwl_priv *priv)
1163 {
1164         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1165
1166         /* Stop device's DMA activity */
1167         iwl_apm_stop_master(priv);
1168
1169         /* Reset the entire device */
1170         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1171
1172         udelay(10);
1173
1174         /*
1175          * Clear "initialization complete" bit to move adapter from
1176          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1177          */
1178         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1179 }
1180 EXPORT_SYMBOL(iwl_apm_stop);
1181
1182
1183 /*
1184  * Start up NIC's basic functionality after it has been reset
1185  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1186  * NOTE:  This does not load uCode nor start the embedded processor
1187  */
1188 int iwl_apm_init(struct iwl_priv *priv)
1189 {
1190         int ret = 0;
1191         u16 lctl;
1192
1193         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1194
1195         /*
1196          * Use "set_bit" below rather than "write", to preserve any hardware
1197          * bits already set by default after reset.
1198          */
1199
1200         /* Disable L0S exit timer (platform NMI Work/Around) */
1201         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1202                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1203
1204         /*
1205          * Disable L0s without affecting L1;
1206          *  don't wait for ICH L0s (ICH bug W/A)
1207          */
1208         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1209                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1210
1211         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1212         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1213
1214         /*
1215          * Enable HAP INTA (interrupt from management bus) to
1216          * wake device's PCI Express link L1a -> L0s
1217          * NOTE:  This is no-op for 3945 (non-existant bit)
1218          */
1219         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1220                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1221
1222         /*
1223          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1224          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1225          * If so (likely), disable L0S, so device moves directly L0->L1;
1226          *    costs negligible amount of power savings.
1227          * If not (unlikely), enable L0S, so there is at least some
1228          *    power savings, even without L1.
1229          */
1230         if (priv->cfg->set_l0s) {
1231                 lctl = iwl_pcie_link_ctl(priv);
1232                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1233                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1234                         /* L1-ASPM enabled; disable(!) L0S  */
1235                         iwl_set_bit(priv, CSR_GIO_REG,
1236                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1237                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1238                 } else {
1239                         /* L1-ASPM disabled; enable(!) L0S */
1240                         iwl_clear_bit(priv, CSR_GIO_REG,
1241                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1242                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1243                 }
1244         }
1245
1246         /* Configure analog phase-lock-loop before activating to D0A */
1247         if (priv->cfg->pll_cfg_val)
1248                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1249
1250         /*
1251          * Set "initialization complete" bit to move adapter from
1252          * D0U* --> D0A* (powered-up active) state.
1253          */
1254         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1255
1256         /*
1257          * Wait for clock stabilization; once stabilized, access to
1258          * device-internal resources is supported, e.g. iwl_write_prph()
1259          * and accesses to uCode SRAM.
1260          */
1261         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1262                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1263                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1264         if (ret < 0) {
1265                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1266                 goto out;
1267         }
1268
1269         /*
1270          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1271          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1272          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1273          * and don't need BSM to restore data after power-saving sleep.
1274          *
1275          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1276          * do not disable clocks.  This preserves any hardware bits already
1277          * set by default in "CLK_CTRL_REG" after reset.
1278          */
1279         if (priv->cfg->use_bsm)
1280                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1281                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1282         else
1283                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1284                         APMG_CLK_VAL_DMA_CLK_RQT);
1285         udelay(20);
1286
1287         /* Disable L1-Active */
1288         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1289                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1290
1291 out:
1292         return ret;
1293 }
1294 EXPORT_SYMBOL(iwl_apm_init);
1295
1296
1297
1298 void iwl_configure_filter(struct ieee80211_hw *hw,
1299                           unsigned int changed_flags,
1300                           unsigned int *total_flags,
1301                           u64 multicast)
1302 {
1303         struct iwl_priv *priv = hw->priv;
1304         __le32 filter_or = 0, filter_nand = 0;
1305
1306 #define CHK(test, flag) do { \
1307         if (*total_flags & (test))              \
1308                 filter_or |= (flag);            \
1309         else                                    \
1310                 filter_nand |= (flag);          \
1311         } while (0)
1312
1313         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1314                         changed_flags, *total_flags);
1315
1316         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1317         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1318         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1319
1320 #undef CHK
1321
1322         mutex_lock(&priv->mutex);
1323
1324         priv->staging_rxon.filter_flags &= ~filter_nand;
1325         priv->staging_rxon.filter_flags |= filter_or;
1326
1327         iwlcore_commit_rxon(priv);
1328
1329         mutex_unlock(&priv->mutex);
1330
1331         /*
1332          * Receiving all multicast frames is always enabled by the
1333          * default flags setup in iwl_connection_init_rx_config()
1334          * since we currently do not support programming multicast
1335          * filters into the device.
1336          */
1337         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1338                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1339 }
1340 EXPORT_SYMBOL(iwl_configure_filter);
1341
1342 int iwl_set_hw_params(struct iwl_priv *priv)
1343 {
1344         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1345         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1346         if (priv->cfg->mod_params->amsdu_size_8K)
1347                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1348         else
1349                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1350
1351         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1352
1353         if (priv->cfg->mod_params->disable_11n)
1354                 priv->cfg->sku &= ~IWL_SKU_N;
1355
1356         /* Device-specific setup */
1357         return priv->cfg->ops->lib->set_hw_params(priv);
1358 }
1359 EXPORT_SYMBOL(iwl_set_hw_params);
1360
1361 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1362 {
1363         int ret = 0;
1364         s8 prev_tx_power = priv->tx_power_user_lmt;
1365
1366         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1367                 IWL_WARN(priv,
1368                          "Requested user TXPOWER %d below lower limit %d.\n",
1369                          tx_power,
1370                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1371                 return -EINVAL;
1372         }
1373
1374         if (tx_power > priv->tx_power_device_lmt) {
1375                 IWL_WARN(priv,
1376                         "Requested user TXPOWER %d above upper limit %d.\n",
1377                          tx_power, priv->tx_power_device_lmt);
1378                 return -EINVAL;
1379         }
1380
1381         if (priv->tx_power_user_lmt != tx_power)
1382                 force = true;
1383
1384         /* if nic is not up don't send command */
1385         if (iwl_is_ready_rf(priv)) {
1386                 priv->tx_power_user_lmt = tx_power;
1387                 if (force && priv->cfg->ops->lib->send_tx_power)
1388                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1389                 else if (!priv->cfg->ops->lib->send_tx_power)
1390                         ret = -EOPNOTSUPP;
1391                 /*
1392                  * if fail to set tx_power, restore the orig. tx power
1393                  */
1394                 if (ret)
1395                         priv->tx_power_user_lmt = prev_tx_power;
1396         }
1397
1398         /*
1399          * Even this is an async host command, the command
1400          * will always report success from uCode
1401          * So once driver can placing the command into the queue
1402          * successfully, driver can use priv->tx_power_user_lmt
1403          * to reflect the current tx power
1404          */
1405         return ret;
1406 }
1407 EXPORT_SYMBOL(iwl_set_tx_power);
1408
1409 irqreturn_t iwl_isr_legacy(int irq, void *data)
1410 {
1411         struct iwl_priv *priv = data;
1412         u32 inta, inta_mask;
1413         u32 inta_fh;
1414         unsigned long flags;
1415         if (!priv)
1416                 return IRQ_NONE;
1417
1418         spin_lock_irqsave(&priv->lock, flags);
1419
1420         /* Disable (but don't clear!) interrupts here to avoid
1421          *    back-to-back ISRs and sporadic interrupts from our NIC.
1422          * If we have something to service, the tasklet will re-enable ints.
1423          * If we *don't* have something, we'll re-enable before leaving here. */
1424         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1425         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1426
1427         /* Discover which interrupts are active/pending */
1428         inta = iwl_read32(priv, CSR_INT);
1429         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1430
1431         /* Ignore interrupt if there's nothing in NIC to service.
1432          * This may be due to IRQ shared with another device,
1433          * or due to sporadic interrupts thrown from our NIC. */
1434         if (!inta && !inta_fh) {
1435                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1436                 goto none;
1437         }
1438
1439         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1440                 /* Hardware disappeared. It might have already raised
1441                  * an interrupt */
1442                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1443                 goto unplugged;
1444         }
1445
1446         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1447                       inta, inta_mask, inta_fh);
1448
1449         inta &= ~CSR_INT_BIT_SCD;
1450
1451         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1452         if (likely(inta || inta_fh))
1453                 tasklet_schedule(&priv->irq_tasklet);
1454
1455  unplugged:
1456         spin_unlock_irqrestore(&priv->lock, flags);
1457         return IRQ_HANDLED;
1458
1459  none:
1460         /* re-enable interrupts here since we don't have anything to service. */
1461         /* only Re-enable if diabled by irq */
1462         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1463                 iwl_enable_interrupts(priv);
1464         spin_unlock_irqrestore(&priv->lock, flags);
1465         return IRQ_NONE;
1466 }
1467 EXPORT_SYMBOL(iwl_isr_legacy);
1468
1469 void iwl_send_bt_config(struct iwl_priv *priv)
1470 {
1471         struct iwl_bt_cmd bt_cmd = {
1472                 .lead_time = BT_LEAD_TIME_DEF,
1473                 .max_kill = BT_MAX_KILL_DEF,
1474                 .kill_ack_mask = 0,
1475                 .kill_cts_mask = 0,
1476         };
1477
1478         if (!bt_coex_active)
1479                 bt_cmd.flags = BT_COEX_DISABLE;
1480         else
1481                 bt_cmd.flags = BT_COEX_ENABLE;
1482
1483         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1484                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1485
1486         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1487                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1488                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1489 }
1490 EXPORT_SYMBOL(iwl_send_bt_config);
1491
1492 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1493 {
1494         struct iwl_statistics_cmd statistics_cmd = {
1495                 .configuration_flags =
1496                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1497         };
1498
1499         if (flags & CMD_ASYNC)
1500                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1501                                                sizeof(struct iwl_statistics_cmd),
1502                                                &statistics_cmd, NULL);
1503         else
1504                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1505                                         sizeof(struct iwl_statistics_cmd),
1506                                         &statistics_cmd);
1507 }
1508 EXPORT_SYMBOL(iwl_send_statistics_request);
1509
1510 /**
1511  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1512  *   using sample data 100 bytes apart.  If these sample points are good,
1513  *   it's a pretty good bet that everything between them is good, too.
1514  */
1515 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1516 {
1517         u32 val;
1518         int ret = 0;
1519         u32 errcnt = 0;
1520         u32 i;
1521
1522         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1523
1524         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1525                 /* read data comes through single port, auto-incr addr */
1526                 /* NOTE: Use the debugless read so we don't flood kernel log
1527                  * if IWL_DL_IO is set */
1528                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1529                         i + IWL49_RTC_INST_LOWER_BOUND);
1530                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1531                 if (val != le32_to_cpu(*image)) {
1532                         ret = -EIO;
1533                         errcnt++;
1534                         if (errcnt >= 3)
1535                                 break;
1536                 }
1537         }
1538
1539         return ret;
1540 }
1541
1542 /**
1543  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1544  *     looking at all data.
1545  */
1546 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1547                                  u32 len)
1548 {
1549         u32 val;
1550         u32 save_len = len;
1551         int ret = 0;
1552         u32 errcnt;
1553
1554         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1555
1556         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1557                            IWL49_RTC_INST_LOWER_BOUND);
1558
1559         errcnt = 0;
1560         for (; len > 0; len -= sizeof(u32), image++) {
1561                 /* read data comes through single port, auto-incr addr */
1562                 /* NOTE: Use the debugless read so we don't flood kernel log
1563                  * if IWL_DL_IO is set */
1564                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1565                 if (val != le32_to_cpu(*image)) {
1566                         IWL_ERR(priv, "uCode INST section is invalid at "
1567                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1568                                   save_len - len, val, le32_to_cpu(*image));
1569                         ret = -EIO;
1570                         errcnt++;
1571                         if (errcnt >= 20)
1572                                 break;
1573                 }
1574         }
1575
1576         if (!errcnt)
1577                 IWL_DEBUG_INFO(priv,
1578                     "ucode image in INSTRUCTION memory is good\n");
1579
1580         return ret;
1581 }
1582
1583 /**
1584  * iwl_verify_ucode - determine which instruction image is in SRAM,
1585  *    and verify its contents
1586  */
1587 int iwl_verify_ucode(struct iwl_priv *priv)
1588 {
1589         __le32 *image;
1590         u32 len;
1591         int ret;
1592
1593         /* Try bootstrap */
1594         image = (__le32 *)priv->ucode_boot.v_addr;
1595         len = priv->ucode_boot.len;
1596         ret = iwlcore_verify_inst_sparse(priv, image, len);
1597         if (!ret) {
1598                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1599                 return 0;
1600         }
1601
1602         /* Try initialize */
1603         image = (__le32 *)priv->ucode_init.v_addr;
1604         len = priv->ucode_init.len;
1605         ret = iwlcore_verify_inst_sparse(priv, image, len);
1606         if (!ret) {
1607                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1608                 return 0;
1609         }
1610
1611         /* Try runtime/protocol */
1612         image = (__le32 *)priv->ucode_code.v_addr;
1613         len = priv->ucode_code.len;
1614         ret = iwlcore_verify_inst_sparse(priv, image, len);
1615         if (!ret) {
1616                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1617                 return 0;
1618         }
1619
1620         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1621
1622         /* Since nothing seems to match, show first several data entries in
1623          * instruction SRAM, so maybe visual inspection will give a clue.
1624          * Selection of bootstrap image (vs. other images) is arbitrary. */
1625         image = (__le32 *)priv->ucode_boot.v_addr;
1626         len = priv->ucode_boot.len;
1627         ret = iwl_verify_inst_full(priv, image, len);
1628
1629         return ret;
1630 }
1631 EXPORT_SYMBOL(iwl_verify_ucode);
1632
1633
1634 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1635 {
1636         struct iwl_ct_kill_config cmd;
1637         struct iwl_ct_kill_throttling_config adv_cmd;
1638         unsigned long flags;
1639         int ret = 0;
1640
1641         spin_lock_irqsave(&priv->lock, flags);
1642         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1643                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1644         spin_unlock_irqrestore(&priv->lock, flags);
1645         priv->thermal_throttle.ct_kill_toggle = false;
1646
1647         if (priv->cfg->support_ct_kill_exit) {
1648                 adv_cmd.critical_temperature_enter =
1649                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1650                 adv_cmd.critical_temperature_exit =
1651                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1652
1653                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1654                                        sizeof(adv_cmd), &adv_cmd);
1655                 if (ret)
1656                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1657                 else
1658                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1659                                         "succeeded, "
1660                                         "critical temperature enter is %d,"
1661                                         "exit is %d\n",
1662                                        priv->hw_params.ct_kill_threshold,
1663                                        priv->hw_params.ct_kill_exit_threshold);
1664         } else {
1665                 cmd.critical_temperature_R =
1666                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1667
1668                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1669                                        sizeof(cmd), &cmd);
1670                 if (ret)
1671                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1672                 else
1673                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1674                                         "succeeded, "
1675                                         "critical temperature is %d\n",
1676                                         priv->hw_params.ct_kill_threshold);
1677         }
1678 }
1679 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1680
1681
1682 /*
1683  * CARD_STATE_CMD
1684  *
1685  * Use: Sets the device's internal card state to enable, disable, or halt
1686  *
1687  * When in the 'enable' state the card operates as normal.
1688  * When in the 'disable' state, the card enters into a low power mode.
1689  * When in the 'halt' state, the card is shut down and must be fully
1690  * restarted to come back on.
1691  */
1692 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1693 {
1694         struct iwl_host_cmd cmd = {
1695                 .id = REPLY_CARD_STATE_CMD,
1696                 .len = sizeof(u32),
1697                 .data = &flags,
1698                 .flags = meta_flag,
1699         };
1700
1701         return iwl_send_cmd(priv, &cmd);
1702 }
1703
1704 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1705                            struct iwl_rx_mem_buffer *rxb)
1706 {
1707 #ifdef CONFIG_IWLWIFI_DEBUG
1708         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1709         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1710         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1711                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1712 #endif
1713 }
1714 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1715
1716 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1717                                       struct iwl_rx_mem_buffer *rxb)
1718 {
1719         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1720         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1721         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1722                         "notification for %s:\n", len,
1723                         get_cmd_string(pkt->hdr.cmd));
1724         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1725 }
1726 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1727
1728 void iwl_rx_reply_error(struct iwl_priv *priv,
1729                         struct iwl_rx_mem_buffer *rxb)
1730 {
1731         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1732
1733         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1734                 "seq 0x%04X ser 0x%08X\n",
1735                 le32_to_cpu(pkt->u.err_resp.error_type),
1736                 get_cmd_string(pkt->u.err_resp.cmd_id),
1737                 pkt->u.err_resp.cmd_id,
1738                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1739                 le32_to_cpu(pkt->u.err_resp.error_info));
1740 }
1741 EXPORT_SYMBOL(iwl_rx_reply_error);
1742
1743 void iwl_clear_isr_stats(struct iwl_priv *priv)
1744 {
1745         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1746 }
1747
1748 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1749                            const struct ieee80211_tx_queue_params *params)
1750 {
1751         struct iwl_priv *priv = hw->priv;
1752         unsigned long flags;
1753         int q;
1754
1755         IWL_DEBUG_MAC80211(priv, "enter\n");
1756
1757         if (!iwl_is_ready_rf(priv)) {
1758                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1759                 return -EIO;
1760         }
1761
1762         if (queue >= AC_NUM) {
1763                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1764                 return 0;
1765         }
1766
1767         q = AC_NUM - 1 - queue;
1768
1769         spin_lock_irqsave(&priv->lock, flags);
1770
1771         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1772         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1773         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1774         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1775                         cpu_to_le16((params->txop * 32));
1776
1777         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1778
1779         spin_unlock_irqrestore(&priv->lock, flags);
1780
1781         IWL_DEBUG_MAC80211(priv, "leave\n");
1782         return 0;
1783 }
1784 EXPORT_SYMBOL(iwl_mac_conf_tx);
1785
1786 static void iwl_ht_conf(struct iwl_priv *priv,
1787                         struct ieee80211_vif *vif)
1788 {
1789         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1790         struct ieee80211_sta *sta;
1791         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1792
1793         IWL_DEBUG_MAC80211(priv, "enter:\n");
1794
1795         if (!ht_conf->is_ht)
1796                 return;
1797
1798         ht_conf->ht_protection =
1799                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1800         ht_conf->non_GF_STA_present =
1801                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1802
1803         ht_conf->single_chain_sufficient = false;
1804
1805         switch (vif->type) {
1806         case NL80211_IFTYPE_STATION:
1807                 rcu_read_lock();
1808                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1809                 if (sta) {
1810                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1811                         int maxstreams;
1812
1813                         maxstreams = (ht_cap->mcs.tx_params &
1814                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1815                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1816                         maxstreams += 1;
1817
1818                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1819                             (ht_cap->mcs.rx_mask[2] == 0))
1820                                 ht_conf->single_chain_sufficient = true;
1821                         if (maxstreams <= 1)
1822                                 ht_conf->single_chain_sufficient = true;
1823                 } else {
1824                         /*
1825                          * If at all, this can only happen through a race
1826                          * when the AP disconnects us while we're still
1827                          * setting up the connection, in that case mac80211
1828                          * will soon tell us about that.
1829                          */
1830                         ht_conf->single_chain_sufficient = true;
1831                 }
1832                 rcu_read_unlock();
1833                 break;
1834         case NL80211_IFTYPE_ADHOC:
1835                 ht_conf->single_chain_sufficient = true;
1836                 break;
1837         default:
1838                 break;
1839         }
1840
1841         IWL_DEBUG_MAC80211(priv, "leave\n");
1842 }
1843
1844 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1845 {
1846         iwl_led_disassociate(priv);
1847         /*
1848          * inform the ucode that there is no longer an
1849          * association and that no more packets should be
1850          * sent
1851          */
1852         priv->staging_rxon.filter_flags &=
1853                 ~RXON_FILTER_ASSOC_MSK;
1854         priv->staging_rxon.assoc_id = 0;
1855         iwlcore_commit_rxon(priv);
1856 }
1857
1858 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1859                           struct ieee80211_vif *vif,
1860                           struct ieee80211_bss_conf *bss_conf,
1861                           u32 changes)
1862 {
1863         struct iwl_priv *priv = hw->priv;
1864         int ret;
1865
1866         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1867
1868         if (!iwl_is_alive(priv))
1869                 return;
1870
1871         mutex_lock(&priv->mutex);
1872
1873         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1874                 dev_kfree_skb(priv->ibss_beacon);
1875                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1876         }
1877
1878         if (changes & BSS_CHANGED_BEACON_INT) {
1879                 /* TODO: in AP mode, do something to make this take effect */
1880         }
1881
1882         if (changes & BSS_CHANGED_BSSID) {
1883                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1884
1885                 /*
1886                  * If there is currently a HW scan going on in the
1887                  * background then we need to cancel it else the RXON
1888                  * below/in post_associate will fail.
1889                  */
1890                 if (iwl_scan_cancel_timeout(priv, 100)) {
1891                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1892                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1893                         mutex_unlock(&priv->mutex);
1894                         return;
1895                 }
1896
1897                 /* mac80211 only sets assoc when in STATION mode */
1898                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1899                         memcpy(priv->staging_rxon.bssid_addr,
1900                                bss_conf->bssid, ETH_ALEN);
1901
1902                         /* currently needed in a few places */
1903                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1904                 } else {
1905                         priv->staging_rxon.filter_flags &=
1906                                 ~RXON_FILTER_ASSOC_MSK;
1907                 }
1908
1909         }
1910
1911         /*
1912          * This needs to be after setting the BSSID in case
1913          * mac80211 decides to do both changes at once because
1914          * it will invoke post_associate.
1915          */
1916         if (vif->type == NL80211_IFTYPE_ADHOC &&
1917             changes & BSS_CHANGED_BEACON) {
1918                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1919
1920                 if (beacon)
1921                         iwl_mac_beacon_update(hw, beacon);
1922         }
1923
1924         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1925                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1926                                    bss_conf->use_short_preamble);
1927                 if (bss_conf->use_short_preamble)
1928                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1929                 else
1930                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1931         }
1932
1933         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1934                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1935                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1936                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1937                 else
1938                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1939         }
1940
1941         if (changes & BSS_CHANGED_BASIC_RATES) {
1942                 /* XXX use this information
1943                  *
1944                  * To do that, remove code from iwl_set_rate() and put something
1945                  * like this here:
1946                  *
1947                 if (A-band)
1948                         priv->staging_rxon.ofdm_basic_rates =
1949                                 bss_conf->basic_rates;
1950                 else
1951                         priv->staging_rxon.ofdm_basic_rates =
1952                                 bss_conf->basic_rates >> 4;
1953                         priv->staging_rxon.cck_basic_rates =
1954                                 bss_conf->basic_rates & 0xF;
1955                  */
1956         }
1957
1958         if (changes & BSS_CHANGED_HT) {
1959                 iwl_ht_conf(priv, vif);
1960
1961                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1962                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1963         }
1964
1965         if (changes & BSS_CHANGED_ASSOC) {
1966                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1967                 if (bss_conf->assoc) {
1968                         priv->timestamp = bss_conf->timestamp;
1969
1970                         iwl_led_associate(priv);
1971
1972                         if (!iwl_is_rfkill(priv))
1973                                 priv->cfg->ops->lib->post_associate(priv, vif);
1974                 } else
1975                         iwl_set_no_assoc(priv);
1976         }
1977
1978         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1979                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1980                                    changes);
1981                 ret = iwl_send_rxon_assoc(priv);
1982                 if (!ret) {
1983                         /* Sync active_rxon with latest change. */
1984                         memcpy((void *)&priv->active_rxon,
1985                                 &priv->staging_rxon,
1986                                 sizeof(struct iwl_rxon_cmd));
1987                 }
1988         }
1989
1990         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1991                 if (vif->bss_conf.enable_beacon) {
1992                         memcpy(priv->staging_rxon.bssid_addr,
1993                                bss_conf->bssid, ETH_ALEN);
1994                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1995                         iwlcore_config_ap(priv, vif);
1996                 } else
1997                         iwl_set_no_assoc(priv);
1998         }
1999
2000         if (changes & BSS_CHANGED_IBSS) {
2001                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
2002                                                         bss_conf->ibss_joined);
2003                 if (ret)
2004                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2005                                 bss_conf->ibss_joined ? "add" : "remove",
2006                                 bss_conf->bssid);
2007         }
2008
2009         mutex_unlock(&priv->mutex);
2010
2011         IWL_DEBUG_MAC80211(priv, "leave\n");
2012 }
2013 EXPORT_SYMBOL(iwl_bss_info_changed);
2014
2015 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2016 {
2017         struct iwl_priv *priv = hw->priv;
2018         unsigned long flags;
2019         __le64 timestamp;
2020
2021         IWL_DEBUG_MAC80211(priv, "enter\n");
2022
2023         if (!iwl_is_ready_rf(priv)) {
2024                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2025                 return -EIO;
2026         }
2027
2028         spin_lock_irqsave(&priv->lock, flags);
2029
2030         if (priv->ibss_beacon)
2031                 dev_kfree_skb(priv->ibss_beacon);
2032
2033         priv->ibss_beacon = skb;
2034
2035         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2036         priv->timestamp = le64_to_cpu(timestamp);
2037
2038         IWL_DEBUG_MAC80211(priv, "leave\n");
2039         spin_unlock_irqrestore(&priv->lock, flags);
2040
2041         priv->cfg->ops->lib->post_associate(priv, priv->vif);
2042
2043         return 0;
2044 }
2045 EXPORT_SYMBOL(iwl_mac_beacon_update);
2046
2047 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2048 {
2049         iwl_connection_init_rx_config(priv, vif);
2050
2051         if (priv->cfg->ops->hcmd->set_rxon_chain)
2052                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2053
2054         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2055
2056         return iwlcore_commit_rxon(priv);
2057 }
2058
2059 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2060 {
2061         struct iwl_priv *priv = hw->priv;
2062         int err = 0;
2063
2064         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2065
2066         mutex_lock(&priv->mutex);
2067
2068         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2069                 err = -EINVAL;
2070                 goto out;
2071         }
2072
2073         if (priv->vif) {
2074                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2075                 err = -EOPNOTSUPP;
2076                 goto out;
2077         }
2078
2079         priv->vif = vif;
2080         priv->iw_mode = vif->type;
2081
2082         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2083         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2084
2085         err = iwl_set_mode(priv, vif);
2086         if (err)
2087                 goto out_err;
2088
2089         goto out;
2090
2091  out_err:
2092         priv->vif = NULL;
2093         priv->iw_mode = NL80211_IFTYPE_STATION;
2094  out:
2095         mutex_unlock(&priv->mutex);
2096
2097         IWL_DEBUG_MAC80211(priv, "leave\n");
2098         return err;
2099 }
2100 EXPORT_SYMBOL(iwl_mac_add_interface);
2101
2102 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2103                               struct ieee80211_vif *vif)
2104 {
2105         struct iwl_priv *priv = hw->priv;
2106
2107         IWL_DEBUG_MAC80211(priv, "enter\n");
2108
2109         mutex_lock(&priv->mutex);
2110
2111         if (iwl_is_ready_rf(priv)) {
2112                 iwl_scan_cancel_timeout(priv, 100);
2113                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2114                 iwlcore_commit_rxon(priv);
2115         }
2116         if (priv->vif == vif) {
2117                 priv->vif = NULL;
2118                 memset(priv->bssid, 0, ETH_ALEN);
2119         }
2120         mutex_unlock(&priv->mutex);
2121
2122         IWL_DEBUG_MAC80211(priv, "leave\n");
2123
2124 }
2125 EXPORT_SYMBOL(iwl_mac_remove_interface);
2126
2127 /**
2128  * iwl_mac_config - mac80211 config callback
2129  */
2130 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2131 {
2132         struct iwl_priv *priv = hw->priv;
2133         const struct iwl_channel_info *ch_info;
2134         struct ieee80211_conf *conf = &hw->conf;
2135         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2136         unsigned long flags = 0;
2137         int ret = 0;
2138         u16 ch;
2139         int scan_active = 0;
2140
2141         mutex_lock(&priv->mutex);
2142
2143         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2144                                         conf->channel->hw_value, changed);
2145
2146         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2147                         test_bit(STATUS_SCANNING, &priv->status))) {
2148                 scan_active = 1;
2149                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2150         }
2151
2152         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2153                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2154                 /* mac80211 uses static for non-HT which is what we want */
2155                 priv->current_ht_config.smps = conf->smps_mode;
2156
2157                 /*
2158                  * Recalculate chain counts.
2159                  *
2160                  * If monitor mode is enabled then mac80211 will
2161                  * set up the SM PS mode to OFF if an HT channel is
2162                  * configured.
2163                  */
2164                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2165                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2166         }
2167
2168         /* during scanning mac80211 will delay channel setting until
2169          * scan finish with changed = 0
2170          */
2171         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2172                 if (scan_active)
2173                         goto set_ch_out;
2174
2175                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2176                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2177                 if (!is_channel_valid(ch_info)) {
2178                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2179                         ret = -EINVAL;
2180                         goto set_ch_out;
2181                 }
2182
2183                 spin_lock_irqsave(&priv->lock, flags);
2184
2185                 /* Configure HT40 channels */
2186                 ht_conf->is_ht = conf_is_ht(conf);
2187                 if (ht_conf->is_ht) {
2188                         if (conf_is_ht40_minus(conf)) {
2189                                 ht_conf->extension_chan_offset =
2190                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2191                                 ht_conf->is_40mhz = true;
2192                         } else if (conf_is_ht40_plus(conf)) {
2193                                 ht_conf->extension_chan_offset =
2194                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2195                                 ht_conf->is_40mhz = true;
2196                         } else {
2197                                 ht_conf->extension_chan_offset =
2198                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2199                                 ht_conf->is_40mhz = false;
2200                         }
2201                 } else
2202                         ht_conf->is_40mhz = false;
2203                 /* Default to no protection. Protection mode will later be set
2204                  * from BSS config in iwl_ht_conf */
2205                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2206
2207                 /* if we are switching from ht to 2.4 clear flags
2208                  * from any ht related info since 2.4 does not
2209                  * support ht */
2210                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2211                         priv->staging_rxon.flags = 0;
2212
2213                 iwl_set_rxon_channel(priv, conf->channel);
2214                 iwl_set_rxon_ht(priv, ht_conf);
2215
2216                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2217                 spin_unlock_irqrestore(&priv->lock, flags);
2218                 if (iwl_is_associated(priv) &&
2219                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2220                     priv->cfg->ops->lib->set_channel_switch) {
2221                         iwl_set_rate(priv);
2222                         /*
2223                          * at this point, staging_rxon has the
2224                          * configuration for channel switch
2225                          */
2226                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2227                                 ch);
2228                         if (!ret) {
2229                                 iwl_print_rx_config_cmd(priv);
2230                                 goto out;
2231                         }
2232                         priv->switch_rxon.switch_in_progress = false;
2233                 }
2234  set_ch_out:
2235                 /* The list of supported rates and rate mask can be different
2236                  * for each band; since the band may have changed, reset
2237                  * the rate mask to what mac80211 lists */
2238                 iwl_set_rate(priv);
2239         }
2240
2241         if (changed & (IEEE80211_CONF_CHANGE_PS |
2242                         IEEE80211_CONF_CHANGE_IDLE)) {
2243                 ret = iwl_power_update_mode(priv, false);
2244                 if (ret)
2245                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2246         }
2247
2248         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2249                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2250                         priv->tx_power_user_lmt, conf->power_level);
2251
2252                 iwl_set_tx_power(priv, conf->power_level, false);
2253         }
2254
2255         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2256                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2257
2258                 spin_lock_irqsave(&priv->lock, flags);
2259                 priv->qos_data.qos_active = qos_active;
2260                 iwl_update_qos(priv);
2261                 spin_unlock_irqrestore(&priv->lock, flags);
2262         }
2263
2264         if (!iwl_is_ready(priv)) {
2265                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2266                 goto out;
2267         }
2268
2269         if (scan_active)
2270                 goto out;
2271
2272         if (memcmp(&priv->active_rxon,
2273                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2274                 iwlcore_commit_rxon(priv);
2275         else
2276                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2277
2278
2279 out:
2280         IWL_DEBUG_MAC80211(priv, "leave\n");
2281         mutex_unlock(&priv->mutex);
2282         return ret;
2283 }
2284 EXPORT_SYMBOL(iwl_mac_config);
2285
2286 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2287 {
2288         struct iwl_priv *priv = hw->priv;
2289         unsigned long flags;
2290
2291         mutex_lock(&priv->mutex);
2292         IWL_DEBUG_MAC80211(priv, "enter\n");
2293
2294         spin_lock_irqsave(&priv->lock, flags);
2295         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2296         spin_unlock_irqrestore(&priv->lock, flags);
2297
2298         spin_lock_irqsave(&priv->lock, flags);
2299
2300         /* new association get rid of ibss beacon skb */
2301         if (priv->ibss_beacon)
2302                 dev_kfree_skb(priv->ibss_beacon);
2303
2304         priv->ibss_beacon = NULL;
2305
2306         priv->timestamp = 0;
2307
2308         spin_unlock_irqrestore(&priv->lock, flags);
2309
2310         if (!iwl_is_ready_rf(priv)) {
2311                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2312                 mutex_unlock(&priv->mutex);
2313                 return;
2314         }
2315
2316         /* we are restarting association process
2317          * clear RXON_FILTER_ASSOC_MSK bit
2318          */
2319         iwl_scan_cancel_timeout(priv, 100);
2320         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2321         iwlcore_commit_rxon(priv);
2322
2323         iwl_set_rate(priv);
2324
2325         mutex_unlock(&priv->mutex);
2326
2327         IWL_DEBUG_MAC80211(priv, "leave\n");
2328 }
2329 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2330
2331 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2332 {
2333         if (!priv->txq)
2334                 priv->txq = kzalloc(
2335                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2336                         GFP_KERNEL);
2337         if (!priv->txq) {
2338                 IWL_ERR(priv, "Not enough memory for txq\n");
2339                 return -ENOMEM;
2340         }
2341         return 0;
2342 }
2343 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2344
2345 void iwl_free_txq_mem(struct iwl_priv *priv)
2346 {
2347         kfree(priv->txq);
2348         priv->txq = NULL;
2349 }
2350 EXPORT_SYMBOL(iwl_free_txq_mem);
2351
2352 #ifdef CONFIG_IWLWIFI_DEBUGFS
2353
2354 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2355
2356 void iwl_reset_traffic_log(struct iwl_priv *priv)
2357 {
2358         priv->tx_traffic_idx = 0;
2359         priv->rx_traffic_idx = 0;
2360         if (priv->tx_traffic)
2361                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2362         if (priv->rx_traffic)
2363                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2364 }
2365
2366 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2367 {
2368         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2369
2370         if (iwl_debug_level & IWL_DL_TX) {
2371                 if (!priv->tx_traffic) {
2372                         priv->tx_traffic =
2373                                 kzalloc(traffic_size, GFP_KERNEL);
2374                         if (!priv->tx_traffic)
2375                                 return -ENOMEM;
2376                 }
2377         }
2378         if (iwl_debug_level & IWL_DL_RX) {
2379                 if (!priv->rx_traffic) {
2380                         priv->rx_traffic =
2381                                 kzalloc(traffic_size, GFP_KERNEL);
2382                         if (!priv->rx_traffic)
2383                                 return -ENOMEM;
2384                 }
2385         }
2386         iwl_reset_traffic_log(priv);
2387         return 0;
2388 }
2389 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2390
2391 void iwl_free_traffic_mem(struct iwl_priv *priv)
2392 {
2393         kfree(priv->tx_traffic);
2394         priv->tx_traffic = NULL;
2395
2396         kfree(priv->rx_traffic);
2397         priv->rx_traffic = NULL;
2398 }
2399 EXPORT_SYMBOL(iwl_free_traffic_mem);
2400
2401 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2402                       u16 length, struct ieee80211_hdr *header)
2403 {
2404         __le16 fc;
2405         u16 len;
2406
2407         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2408                 return;
2409
2410         if (!priv->tx_traffic)
2411                 return;
2412
2413         fc = header->frame_control;
2414         if (ieee80211_is_data(fc)) {
2415                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2416                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2417                 memcpy((priv->tx_traffic +
2418                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2419                        header, len);
2420                 priv->tx_traffic_idx =
2421                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2422         }
2423 }
2424 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2425
2426 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2427                       u16 length, struct ieee80211_hdr *header)
2428 {
2429         __le16 fc;
2430         u16 len;
2431
2432         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2433                 return;
2434
2435         if (!priv->rx_traffic)
2436                 return;
2437
2438         fc = header->frame_control;
2439         if (ieee80211_is_data(fc)) {
2440                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2441                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2442                 memcpy((priv->rx_traffic +
2443                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2444                        header, len);
2445                 priv->rx_traffic_idx =
2446                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2447         }
2448 }
2449 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2450
2451 const char *get_mgmt_string(int cmd)
2452 {
2453         switch (cmd) {
2454                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2455                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2456                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2457                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2458                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2459                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2460                 IWL_CMD(MANAGEMENT_BEACON);
2461                 IWL_CMD(MANAGEMENT_ATIM);
2462                 IWL_CMD(MANAGEMENT_DISASSOC);
2463                 IWL_CMD(MANAGEMENT_AUTH);
2464                 IWL_CMD(MANAGEMENT_DEAUTH);
2465                 IWL_CMD(MANAGEMENT_ACTION);
2466         default:
2467                 return "UNKNOWN";
2468
2469         }
2470 }
2471
2472 const char *get_ctrl_string(int cmd)
2473 {
2474         switch (cmd) {
2475                 IWL_CMD(CONTROL_BACK_REQ);
2476                 IWL_CMD(CONTROL_BACK);
2477                 IWL_CMD(CONTROL_PSPOLL);
2478                 IWL_CMD(CONTROL_RTS);
2479                 IWL_CMD(CONTROL_CTS);
2480                 IWL_CMD(CONTROL_ACK);
2481                 IWL_CMD(CONTROL_CFEND);
2482                 IWL_CMD(CONTROL_CFENDACK);
2483         default:
2484                 return "UNKNOWN";
2485
2486         }
2487 }
2488
2489 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2490 {
2491         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2492         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2493         priv->led_tpt = 0;
2494 }
2495
2496 /*
2497  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2498  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2499  * Use debugFs to display the rx/rx_statistics
2500  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2501  * information will be recorded, but DATA pkt still will be recorded
2502  * for the reason of iwl_led.c need to control the led blinking based on
2503  * number of tx and rx data.
2504  *
2505  */
2506 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2507 {
2508         struct traffic_stats    *stats;
2509
2510         if (is_tx)
2511                 stats = &priv->tx_stats;
2512         else
2513                 stats = &priv->rx_stats;
2514
2515         if (ieee80211_is_mgmt(fc)) {
2516                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2517                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2518                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2519                         break;
2520                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2521                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2522                         break;
2523                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2524                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2525                         break;
2526                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2527                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2528                         break;
2529                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2530                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2531                         break;
2532                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2533                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2534                         break;
2535                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2536                         stats->mgmt[MANAGEMENT_BEACON]++;
2537                         break;
2538                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2539                         stats->mgmt[MANAGEMENT_ATIM]++;
2540                         break;
2541                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2542                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2543                         break;
2544                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2545                         stats->mgmt[MANAGEMENT_AUTH]++;
2546                         break;
2547                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2548                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2549                         break;
2550                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2551                         stats->mgmt[MANAGEMENT_ACTION]++;
2552                         break;
2553                 }
2554         } else if (ieee80211_is_ctl(fc)) {
2555                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2556                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2557                         stats->ctrl[CONTROL_BACK_REQ]++;
2558                         break;
2559                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2560                         stats->ctrl[CONTROL_BACK]++;
2561                         break;
2562                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2563                         stats->ctrl[CONTROL_PSPOLL]++;
2564                         break;
2565                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2566                         stats->ctrl[CONTROL_RTS]++;
2567                         break;
2568                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2569                         stats->ctrl[CONTROL_CTS]++;
2570                         break;
2571                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2572                         stats->ctrl[CONTROL_ACK]++;
2573                         break;
2574                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2575                         stats->ctrl[CONTROL_CFEND]++;
2576                         break;
2577                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2578                         stats->ctrl[CONTROL_CFENDACK]++;
2579                         break;
2580                 }
2581         } else {
2582                 /* data */
2583                 stats->data_cnt++;
2584                 stats->data_bytes += len;
2585         }
2586         iwl_leds_background(priv);
2587 }
2588 EXPORT_SYMBOL(iwl_update_stats);
2589 #endif
2590
2591 const static char *get_csr_string(int cmd)
2592 {
2593         switch (cmd) {
2594                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2595                 IWL_CMD(CSR_INT_COALESCING);
2596                 IWL_CMD(CSR_INT);
2597                 IWL_CMD(CSR_INT_MASK);
2598                 IWL_CMD(CSR_FH_INT_STATUS);
2599                 IWL_CMD(CSR_GPIO_IN);
2600                 IWL_CMD(CSR_RESET);
2601                 IWL_CMD(CSR_GP_CNTRL);
2602                 IWL_CMD(CSR_HW_REV);
2603                 IWL_CMD(CSR_EEPROM_REG);
2604                 IWL_CMD(CSR_EEPROM_GP);
2605                 IWL_CMD(CSR_OTP_GP_REG);
2606                 IWL_CMD(CSR_GIO_REG);
2607                 IWL_CMD(CSR_GP_UCODE_REG);
2608                 IWL_CMD(CSR_GP_DRIVER_REG);
2609                 IWL_CMD(CSR_UCODE_DRV_GP1);
2610                 IWL_CMD(CSR_UCODE_DRV_GP2);
2611                 IWL_CMD(CSR_LED_REG);
2612                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2613                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2614                 IWL_CMD(CSR_ANA_PLL_CFG);
2615                 IWL_CMD(CSR_HW_REV_WA_REG);
2616                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2617         default:
2618                 return "UNKNOWN";
2619
2620         }
2621 }
2622
2623 void iwl_dump_csr(struct iwl_priv *priv)
2624 {
2625         int i;
2626         u32 csr_tbl[] = {
2627                 CSR_HW_IF_CONFIG_REG,
2628                 CSR_INT_COALESCING,
2629                 CSR_INT,
2630                 CSR_INT_MASK,
2631                 CSR_FH_INT_STATUS,
2632                 CSR_GPIO_IN,
2633                 CSR_RESET,
2634                 CSR_GP_CNTRL,
2635                 CSR_HW_REV,
2636                 CSR_EEPROM_REG,
2637                 CSR_EEPROM_GP,
2638                 CSR_OTP_GP_REG,
2639                 CSR_GIO_REG,
2640                 CSR_GP_UCODE_REG,
2641                 CSR_GP_DRIVER_REG,
2642                 CSR_UCODE_DRV_GP1,
2643                 CSR_UCODE_DRV_GP2,
2644                 CSR_LED_REG,
2645                 CSR_DRAM_INT_TBL_REG,
2646                 CSR_GIO_CHICKEN_BITS,
2647                 CSR_ANA_PLL_CFG,
2648                 CSR_HW_REV_WA_REG,
2649                 CSR_DBG_HPET_MEM_REG
2650         };
2651         IWL_ERR(priv, "CSR values:\n");
2652         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2653                 "CSR_INT_PERIODIC_REG)\n");
2654         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2655                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2656                         get_csr_string(csr_tbl[i]),
2657                         iwl_read32(priv, csr_tbl[i]));
2658         }
2659 }
2660 EXPORT_SYMBOL(iwl_dump_csr);
2661
2662 const static char *get_fh_string(int cmd)
2663 {
2664         switch (cmd) {
2665                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2666                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2667                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2668                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2669                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2670                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2671                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2672                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2673                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2674         default:
2675                 return "UNKNOWN";
2676
2677         }
2678 }
2679
2680 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2681 {
2682         int i;
2683 #ifdef CONFIG_IWLWIFI_DEBUG
2684         int pos = 0;
2685         size_t bufsz = 0;
2686 #endif
2687         u32 fh_tbl[] = {
2688                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2689                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2690                 FH_RSCSR_CHNL0_WPTR,
2691                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2692                 FH_MEM_RSSR_SHARED_CTRL_REG,
2693                 FH_MEM_RSSR_RX_STATUS_REG,
2694                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2695                 FH_TSSR_TX_STATUS_REG,
2696                 FH_TSSR_TX_ERROR_REG
2697         };
2698 #ifdef CONFIG_IWLWIFI_DEBUG
2699         if (display) {
2700                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2701                 *buf = kmalloc(bufsz, GFP_KERNEL);
2702                 if (!*buf)
2703                         return -ENOMEM;
2704                 pos += scnprintf(*buf + pos, bufsz - pos,
2705                                 "FH register values:\n");
2706                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2707                         pos += scnprintf(*buf + pos, bufsz - pos,
2708                                 "  %34s: 0X%08x\n",
2709                                 get_fh_string(fh_tbl[i]),
2710                                 iwl_read_direct32(priv, fh_tbl[i]));
2711                 }
2712                 return pos;
2713         }
2714 #endif
2715         IWL_ERR(priv, "FH register values:\n");
2716         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2717                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2718                         get_fh_string(fh_tbl[i]),
2719                         iwl_read_direct32(priv, fh_tbl[i]));
2720         }
2721         return 0;
2722 }
2723 EXPORT_SYMBOL(iwl_dump_fh);
2724
2725 static void iwl_force_rf_reset(struct iwl_priv *priv)
2726 {
2727         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2728                 return;
2729
2730         if (!iwl_is_associated(priv)) {
2731                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2732                 return;
2733         }
2734         /*
2735          * There is no easy and better way to force reset the radio,
2736          * the only known method is switching channel which will force to
2737          * reset and tune the radio.
2738          * Use internal short scan (single channel) operation to should
2739          * achieve this objective.
2740          * Driver should reset the radio when number of consecutive missed
2741          * beacon, or any other uCode error condition detected.
2742          */
2743         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2744         iwl_internal_short_hw_scan(priv);
2745 }
2746
2747
2748 int iwl_force_reset(struct iwl_priv *priv, int mode)
2749 {
2750         struct iwl_force_reset *force_reset;
2751
2752         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2753                 return -EINVAL;
2754
2755         if (mode >= IWL_MAX_FORCE_RESET) {
2756                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2757                 return -EINVAL;
2758         }
2759         force_reset = &priv->force_reset[mode];
2760         force_reset->reset_request_count++;
2761         if (force_reset->last_force_reset_jiffies &&
2762             time_after(force_reset->last_force_reset_jiffies +
2763             force_reset->reset_duration, jiffies)) {
2764                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2765                 force_reset->reset_reject_count++;
2766                 return -EAGAIN;
2767         }
2768         force_reset->reset_success_count++;
2769         force_reset->last_force_reset_jiffies = jiffies;
2770         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2771         switch (mode) {
2772         case IWL_RF_RESET:
2773                 iwl_force_rf_reset(priv);
2774                 break;
2775         case IWL_FW_RESET:
2776                 IWL_ERR(priv, "On demand firmware reload\n");
2777                 /* Set the FW error flag -- cleared on iwl_down */
2778                 set_bit(STATUS_FW_ERROR, &priv->status);
2779                 wake_up_interruptible(&priv->wait_command_queue);
2780                 /*
2781                  * Keep the restart process from trying to send host
2782                  * commands by clearing the INIT status bit
2783                  */
2784                 clear_bit(STATUS_READY, &priv->status);
2785                 queue_work(priv->workqueue, &priv->restart);
2786                 break;
2787         }
2788         return 0;
2789 }
2790 EXPORT_SYMBOL(iwl_force_reset);
2791
2792 /**
2793  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2794  *
2795  * During normal condition (no queue is stuck), the timer is continually set to
2796  * execute every monitor_recover_period milliseconds after the last timer
2797  * expired.  When the queue read_ptr is at the same place, the timer is
2798  * shorten to 100mSecs.  This is
2799  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2800  *      2) to detect the stuck queues quicker before the station and AP can
2801  *      disassociate each other.
2802  *
2803  * This function monitors all the tx queues and recover from it if any
2804  * of the queues are stuck.
2805  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2806  *      it will recover by resetting the firmware and return.
2807  * 2. Then, it checks for station association.  If it associates it will check
2808  *      other queues.  If any queue is stuck, it will recover by resetting
2809  *      the firmware.
2810  * Note: It the number of times the queue read_ptr to be at the same place to
2811  *      be MAX_REPEAT+1 in order to consider to be stuck.
2812  */
2813 /*
2814  * The maximum number of times the read pointer of the tx queue at the
2815  * same place without considering to be stuck.
2816  */
2817 #define MAX_REPEAT      (2)
2818 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2819 {
2820         struct iwl_tx_queue *txq;
2821         struct iwl_queue *q;
2822
2823         txq = &priv->txq[cnt];
2824         q = &txq->q;
2825         /* queue is empty, skip */
2826         if (q->read_ptr != q->write_ptr) {
2827                 if (q->read_ptr == q->last_read_ptr) {
2828                         /* a queue has not been read from last time */
2829                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2830                                 IWL_ERR(priv,
2831                                         "queue %d stuck %d time. Fw reload.\n",
2832                                         q->id, q->repeat_same_read_ptr);
2833                                 q->repeat_same_read_ptr = 0;
2834                                 iwl_force_reset(priv, IWL_FW_RESET);
2835                         } else {
2836                                 q->repeat_same_read_ptr++;
2837                                 IWL_DEBUG_RADIO(priv,
2838                                                 "queue %d, not read %d time\n",
2839                                                 q->id,
2840                                                 q->repeat_same_read_ptr);
2841                                 mod_timer(&priv->monitor_recover, jiffies +
2842                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2843                         }
2844                         return 1;
2845                 } else {
2846                         q->last_read_ptr = q->read_ptr;
2847                         q->repeat_same_read_ptr = 0;
2848                 }
2849         }
2850         return 0;
2851 }
2852
2853 void iwl_bg_monitor_recover(unsigned long data)
2854 {
2855         struct iwl_priv *priv = (struct iwl_priv *)data;
2856         int cnt;
2857
2858         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2859                 return;
2860
2861         /* monitor and check for stuck cmd queue */
2862         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2863                 return;
2864
2865         /* monitor and check for other stuck queues */
2866         if (iwl_is_associated(priv)) {
2867                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2868                         /* skip as we already checked the command queue */
2869                         if (cnt == IWL_CMD_QUEUE_NUM)
2870                                 continue;
2871                         if (iwl_check_stuck_queue(priv, cnt))
2872                                 return;
2873                 }
2874         }
2875         /*
2876          * Reschedule the timer to occur in
2877          * priv->cfg->monitor_recover_period
2878          */
2879         mod_timer(&priv->monitor_recover,
2880                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2881 }
2882 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2883
2884 #ifdef CONFIG_PM
2885
2886 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2887 {
2888         struct iwl_priv *priv = pci_get_drvdata(pdev);
2889
2890         /*
2891          * This function is called when system goes into suspend state
2892          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2893          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2894          * it will not call apm_ops.stop() to stop the DMA operation.
2895          * Calling apm_ops.stop here to make sure we stop the DMA.
2896          */
2897         priv->cfg->ops->lib->apm_ops.stop(priv);
2898
2899         pci_save_state(pdev);
2900         pci_disable_device(pdev);
2901         pci_set_power_state(pdev, PCI_D3hot);
2902
2903         return 0;
2904 }
2905 EXPORT_SYMBOL(iwl_pci_suspend);
2906
2907 int iwl_pci_resume(struct pci_dev *pdev)
2908 {
2909         struct iwl_priv *priv = pci_get_drvdata(pdev);
2910         int ret;
2911
2912         /*
2913          * We disable the RETRY_TIMEOUT register (0x41) to keep
2914          * PCI Tx retries from interfering with C3 CPU state.
2915          */
2916         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2917
2918         pci_set_power_state(pdev, PCI_D0);
2919         ret = pci_enable_device(pdev);
2920         if (ret)
2921                 return ret;
2922         pci_restore_state(pdev);
2923         iwl_enable_interrupts(priv);
2924
2925         return 0;
2926 }
2927 EXPORT_SYMBOL(iwl_pci_resume);
2928
2929 #endif /* CONFIG_PM */