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 /**
 858  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 859  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 860  * @channel: Any channel valid for the requested phymode
 861
 862  * In addition to setting the staging RXON, priv->phymode is also set.
 863  *
 864  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 865  * in the staging RXON flag structure based on the phymode
 866  */
 867 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 868 {
 869         enum ieee80211_band band = ch->band;
 870         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 871
 872         if (!iwl_get_channel_info(priv, band, channel)) {
 873                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 874                                channel, band);
 875                 return -EINVAL;
 876         }
 877
 878         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 879             (priv->band == band))
 880                 return 0;
 881
 882         priv->staging_rxon.channel = cpu_to_le16(channel);
 883         if (band == IEEE80211_BAND_5GHZ)
 884                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 885         else
 886                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 887
 888         priv->band = band;
 889
 890         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 891
 892         return 0;
 893 }
 894 EXPORT_SYMBOL(iwl_set_rxon_channel);
 895
 896 static void iwl_set_flags_for_band(struct iwl_priv *priv,
 897                                    enum ieee80211_band band,
 898                                    struct ieee80211_vif *vif)
 899 {
 900         if (band == IEEE80211_BAND_5GHZ) {
 901                 priv->staging_rxon.flags &=
 902                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 903                       | RXON_FLG_CCK_MSK);
 904                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 905         } else {
 906                 /* Copied from iwl_post_associate() */
 907                 if (vif && vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 908                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 909                 else
 910                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 911
 912                 if (vif && vif->type == NL80211_IFTYPE_ADHOC)
 913                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 914
 915                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 916                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 917                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 918         }
 919 }
 920
 921 /*
 922  * initialize rxon structure with default values from eeprom
 923  */
 924 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 925                                    struct ieee80211_vif *vif)
 926 {
 927         const struct iwl_channel_info *ch_info;
 928         enum nl80211_iftype type = NL80211_IFTYPE_STATION;
 929
 930         if (vif)
 931                 type = vif->type;
 932
 933         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 934
 935         switch (type) {
 936         case NL80211_IFTYPE_AP:
 937                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 938                 break;
 939
 940         case NL80211_IFTYPE_STATION:
 941                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 942                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 943                 break;
 944
 945         case NL80211_IFTYPE_ADHOC:
 946                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 947                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 948                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 949                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 950                 break;
 951
 952         default:
 953                 IWL_ERR(priv, "Unsupported interface type %d\n", type);
 954                 break;
 955         }
 956
 957 #if 0
 958         /* TODO:  Figure out when short_preamble would be set and cache from
 959          * that */
 960         if (!hw_to_local(priv->hw)->short_preamble)
 961                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 962         else
 963                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 964 #endif
 965
 966         ch_info = iwl_get_channel_info(priv, priv->band,
 967                                        le16_to_cpu(priv->active_rxon.channel));
 968
 969         if (!ch_info)
 970                 ch_info = &priv->channel_info[0];
 971
 972         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 973         priv->band = ch_info->band;
 974
 975         iwl_set_flags_for_band(priv, priv->band, vif);
 976
 977         priv->staging_rxon.ofdm_basic_rates =
 978             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 979         priv->staging_rxon.cck_basic_rates =
 980             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 981
 982         /* clear both MIX and PURE40 mode flag */
 983         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 984                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 985         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 986         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
 987         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 988         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 989         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
 990 }
 991 EXPORT_SYMBOL(iwl_connection_init_rx_config);
 992
 993 static void iwl_set_rate(struct iwl_priv *priv)
 994 {
 995         const struct ieee80211_supported_band *hw = NULL;
 996         struct ieee80211_rate *rate;
 997         int i;
 998
 999         hw = iwl_get_hw_mode(priv, priv->band);
1000         if (!hw) {
1001                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1002                 return;
1003         }
1004
1005         priv->active_rate = 0;
1006
1007         for (i = 0; i < hw->n_bitrates; i++) {
1008                 rate = &(hw->bitrates[i]);
1009                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1010                         priv->active_rate |= (1 << rate->hw_value);
1011         }
1012
1013         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1014
1015         priv->staging_rxon.cck_basic_rates =
1016             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1017
1018         priv->staging_rxon.ofdm_basic_rates =
1019            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1020 }
1021
1022 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1023 {
1024         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1025         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1026         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1027
1028         if (priv->switch_rxon.switch_in_progress) {
1029                 if (!le32_to_cpu(csa->status) &&
1030                     (csa->channel == priv->switch_rxon.channel)) {
1031                         rxon->channel = csa->channel;
1032                         priv->staging_rxon.channel = csa->channel;
1033                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1034                               le16_to_cpu(csa->channel));
1035                 } else
1036                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1037                               le16_to_cpu(csa->channel));
1038
1039                 priv->switch_rxon.switch_in_progress = false;
1040         }
1041 }
1042 EXPORT_SYMBOL(iwl_rx_csa);
1043
1044 #ifdef CONFIG_IWLWIFI_DEBUG
1045 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1046 {
1047         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1048
1049         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1050         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1051         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1052         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1053         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1054                         le32_to_cpu(rxon->filter_flags));
1055         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1056         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1057                         rxon->ofdm_basic_rates);
1058         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1059         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1060         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1061         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1062 }
1063 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1064 #endif
1065 /**
1066  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1067  */
1068 void iwl_irq_handle_error(struct iwl_priv *priv)
1069 {
1070         /* Set the FW error flag -- cleared on iwl_down */
1071         set_bit(STATUS_FW_ERROR, &priv->status);
1072
1073         /* Cancel currently queued command. */
1074         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1075
1076         IWL_ERR(priv, "Loaded firmware version: %s\n",
1077                 priv->hw->wiphy->fw_version);
1078
1079         priv->cfg->ops->lib->dump_nic_error_log(priv);
1080         if (priv->cfg->ops->lib->dump_csr)
1081                 priv->cfg->ops->lib->dump_csr(priv);
1082         if (priv->cfg->ops->lib->dump_fh)
1083                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1084         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1085 #ifdef CONFIG_IWLWIFI_DEBUG
1086         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1087                 iwl_print_rx_config_cmd(priv);
1088 #endif
1089
1090         wake_up_interruptible(&priv->wait_command_queue);
1091
1092         /* Keep the restart process from trying to send host
1093          * commands by clearing the INIT status bit */
1094         clear_bit(STATUS_READY, &priv->status);
1095
1096         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1097                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1098                           "Restarting adapter due to uCode error.\n");
1099
1100                 if (priv->cfg->mod_params->restart_fw)
1101                         queue_work(priv->workqueue, &priv->restart);
1102         }
1103 }
1104 EXPORT_SYMBOL(iwl_irq_handle_error);
1105
1106 static int iwl_apm_stop_master(struct iwl_priv *priv)
1107 {
1108         int ret = 0;
1109
1110         /* stop device's busmaster DMA activity */
1111         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1112
1113         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1114                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1115         if (ret)
1116                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1117
1118         IWL_DEBUG_INFO(priv, "stop master\n");
1119
1120         return ret;
1121 }
1122
1123 void iwl_apm_stop(struct iwl_priv *priv)
1124 {
1125         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1126
1127         /* Stop device's DMA activity */
1128         iwl_apm_stop_master(priv);
1129
1130         /* Reset the entire device */
1131         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1132
1133         udelay(10);
1134
1135         /*
1136          * Clear "initialization complete" bit to move adapter from
1137          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1138          */
1139         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1140 }
1141 EXPORT_SYMBOL(iwl_apm_stop);
1142
1143
1144 /*
1145  * Start up NIC's basic functionality after it has been reset
1146  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1147  * NOTE:  This does not load uCode nor start the embedded processor
1148  */
1149 int iwl_apm_init(struct iwl_priv *priv)
1150 {
1151         int ret = 0;
1152         u16 lctl;
1153
1154         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1155
1156         /*
1157          * Use "set_bit" below rather than "write", to preserve any hardware
1158          * bits already set by default after reset.
1159          */
1160
1161         /* Disable L0S exit timer (platform NMI Work/Around) */
1162         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1163                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1164
1165         /*
1166          * Disable L0s without affecting L1;
1167          *  don't wait for ICH L0s (ICH bug W/A)
1168          */
1169         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1170                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1171
1172         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1173         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1174
1175         /*
1176          * Enable HAP INTA (interrupt from management bus) to
1177          * wake device's PCI Express link L1a -> L0s
1178          * NOTE:  This is no-op for 3945 (non-existant bit)
1179          */
1180         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1181                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1182
1183         /*
1184          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1185          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1186          * If so (likely), disable L0S, so device moves directly L0->L1;
1187          *    costs negligible amount of power savings.
1188          * If not (unlikely), enable L0S, so there is at least some
1189          *    power savings, even without L1.
1190          */
1191         if (priv->cfg->set_l0s) {
1192                 lctl = iwl_pcie_link_ctl(priv);
1193                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1194                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1195                         /* L1-ASPM enabled; disable(!) L0S  */
1196                         iwl_set_bit(priv, CSR_GIO_REG,
1197                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1198                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1199                 } else {
1200                         /* L1-ASPM disabled; enable(!) L0S */
1201                         iwl_clear_bit(priv, CSR_GIO_REG,
1202                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1203                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1204                 }
1205         }
1206
1207         /* Configure analog phase-lock-loop before activating to D0A */
1208         if (priv->cfg->pll_cfg_val)
1209                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1210
1211         /*
1212          * Set "initialization complete" bit to move adapter from
1213          * D0U* --> D0A* (powered-up active) state.
1214          */
1215         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1216
1217         /*
1218          * Wait for clock stabilization; once stabilized, access to
1219          * device-internal resources is supported, e.g. iwl_write_prph()
1220          * and accesses to uCode SRAM.
1221          */
1222         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1223                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1224                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1225         if (ret < 0) {
1226                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1227                 goto out;
1228         }
1229
1230         /*
1231          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1232          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1233          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1234          * and don't need BSM to restore data after power-saving sleep.
1235          *
1236          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1237          * do not disable clocks.  This preserves any hardware bits already
1238          * set by default in "CLK_CTRL_REG" after reset.
1239          */
1240         if (priv->cfg->use_bsm)
1241                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1242                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1243         else
1244                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1245                         APMG_CLK_VAL_DMA_CLK_RQT);
1246         udelay(20);
1247
1248         /* Disable L1-Active */
1249         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1250                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1251
1252 out:
1253         return ret;
1254 }
1255 EXPORT_SYMBOL(iwl_apm_init);
1256
1257
1258
1259 void iwl_configure_filter(struct ieee80211_hw *hw,
1260                           unsigned int changed_flags,
1261                           unsigned int *total_flags,
1262                           u64 multicast)
1263 {
1264         struct iwl_priv *priv = hw->priv;
1265         __le32 filter_or = 0, filter_nand = 0;
1266
1267 #define CHK(test, flag) do { \
1268         if (*total_flags & (test))              \
1269                 filter_or |= (flag);            \
1270         else                                    \
1271                 filter_nand |= (flag);          \
1272         } while (0)
1273
1274         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1275                         changed_flags, *total_flags);
1276
1277         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1278         CHK(FIF_ALLMULTI, RXON_FILTER_ACCEPT_GRP_MSK);
1279         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1280         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1281
1282 #undef CHK
1283
1284         mutex_lock(&priv->mutex);
1285
1286         priv->staging_rxon.filter_flags &= ~filter_nand;
1287         priv->staging_rxon.filter_flags |= filter_or;
1288
1289         iwlcore_commit_rxon(priv);
1290
1291         mutex_unlock(&priv->mutex);
1292
1293         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1294                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1295 }
1296 EXPORT_SYMBOL(iwl_configure_filter);
1297
1298 int iwl_set_hw_params(struct iwl_priv *priv)
1299 {
1300         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1301         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1302         if (priv->cfg->mod_params->amsdu_size_8K)
1303                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1304         else
1305                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1306
1307         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1308
1309         if (priv->cfg->mod_params->disable_11n)
1310                 priv->cfg->sku &= ~IWL_SKU_N;
1311
1312         /* Device-specific setup */
1313         return priv->cfg->ops->lib->set_hw_params(priv);
1314 }
1315 EXPORT_SYMBOL(iwl_set_hw_params);
1316
1317 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1318 {
1319         int ret = 0;
1320         s8 prev_tx_power = priv->tx_power_user_lmt;
1321
1322         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1323                 IWL_WARN(priv,
1324                          "Requested user TXPOWER %d below lower limit %d.\n",
1325                          tx_power,
1326                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1327                 return -EINVAL;
1328         }
1329
1330         if (tx_power > priv->tx_power_device_lmt) {
1331                 IWL_WARN(priv,
1332                         "Requested user TXPOWER %d above upper limit %d.\n",
1333                          tx_power, priv->tx_power_device_lmt);
1334                 return -EINVAL;
1335         }
1336
1337         if (priv->tx_power_user_lmt != tx_power)
1338                 force = true;
1339
1340         /* if nic is not up don't send command */
1341         if (iwl_is_ready_rf(priv)) {
1342                 priv->tx_power_user_lmt = tx_power;
1343                 if (force && priv->cfg->ops->lib->send_tx_power)
1344                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1345                 else if (!priv->cfg->ops->lib->send_tx_power)
1346                         ret = -EOPNOTSUPP;
1347                 /*
1348                  * if fail to set tx_power, restore the orig. tx power
1349                  */
1350                 if (ret)
1351                         priv->tx_power_user_lmt = prev_tx_power;
1352         }
1353
1354         /*
1355          * Even this is an async host command, the command
1356          * will always report success from uCode
1357          * So once driver can placing the command into the queue
1358          * successfully, driver can use priv->tx_power_user_lmt
1359          * to reflect the current tx power
1360          */
1361         return ret;
1362 }
1363 EXPORT_SYMBOL(iwl_set_tx_power);
1364
1365 irqreturn_t iwl_isr_legacy(int irq, void *data)
1366 {
1367         struct iwl_priv *priv = data;
1368         u32 inta, inta_mask;
1369         u32 inta_fh;
1370         unsigned long flags;
1371         if (!priv)
1372                 return IRQ_NONE;
1373
1374         spin_lock_irqsave(&priv->lock, flags);
1375
1376         /* Disable (but don't clear!) interrupts here to avoid
1377          *    back-to-back ISRs and sporadic interrupts from our NIC.
1378          * If we have something to service, the tasklet will re-enable ints.
1379          * If we *don't* have something, we'll re-enable before leaving here. */
1380         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1381         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1382
1383         /* Discover which interrupts are active/pending */
1384         inta = iwl_read32(priv, CSR_INT);
1385         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1386
1387         /* Ignore interrupt if there's nothing in NIC to service.
1388          * This may be due to IRQ shared with another device,
1389          * or due to sporadic interrupts thrown from our NIC. */
1390         if (!inta && !inta_fh) {
1391                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1392                 goto none;
1393         }
1394
1395         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1396                 /* Hardware disappeared. It might have already raised
1397                  * an interrupt */
1398                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1399                 goto unplugged;
1400         }
1401
1402         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1403                       inta, inta_mask, inta_fh);
1404
1405         inta &= ~CSR_INT_BIT_SCD;
1406
1407         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1408         if (likely(inta || inta_fh))
1409                 tasklet_schedule(&priv->irq_tasklet);
1410
1411  unplugged:
1412         spin_unlock_irqrestore(&priv->lock, flags);
1413         return IRQ_HANDLED;
1414
1415  none:
1416         /* re-enable interrupts here since we don't have anything to service. */
1417         /* only Re-enable if diabled by irq */
1418         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1419                 iwl_enable_interrupts(priv);
1420         spin_unlock_irqrestore(&priv->lock, flags);
1421         return IRQ_NONE;
1422 }
1423 EXPORT_SYMBOL(iwl_isr_legacy);
1424
1425 void iwl_send_bt_config(struct iwl_priv *priv)
1426 {
1427         struct iwl_bt_cmd bt_cmd = {
1428                 .lead_time = BT_LEAD_TIME_DEF,
1429                 .max_kill = BT_MAX_KILL_DEF,
1430                 .kill_ack_mask = 0,
1431                 .kill_cts_mask = 0,
1432         };
1433
1434         if (!bt_coex_active)
1435                 bt_cmd.flags = BT_COEX_DISABLE;
1436         else
1437                 bt_cmd.flags = BT_COEX_ENABLE;
1438
1439         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1440                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1441
1442         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1443                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1444                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1445 }
1446 EXPORT_SYMBOL(iwl_send_bt_config);
1447
1448 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1449 {
1450         struct iwl_statistics_cmd statistics_cmd = {
1451                 .configuration_flags =
1452                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1453         };
1454
1455         if (flags & CMD_ASYNC)
1456                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1457                                                sizeof(struct iwl_statistics_cmd),
1458                                                &statistics_cmd, NULL);
1459         else
1460                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1461                                         sizeof(struct iwl_statistics_cmd),
1462                                         &statistics_cmd);
1463 }
1464 EXPORT_SYMBOL(iwl_send_statistics_request);
1465
1466 /**
1467  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1468  *   using sample data 100 bytes apart.  If these sample points are good,
1469  *   it's a pretty good bet that everything between them is good, too.
1470  */
1471 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1472 {
1473         u32 val;
1474         int ret = 0;
1475         u32 errcnt = 0;
1476         u32 i;
1477
1478         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1479
1480         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1481                 /* read data comes through single port, auto-incr addr */
1482                 /* NOTE: Use the debugless read so we don't flood kernel log
1483                  * if IWL_DL_IO is set */
1484                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1485                         i + IWL49_RTC_INST_LOWER_BOUND);
1486                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1487                 if (val != le32_to_cpu(*image)) {
1488                         ret = -EIO;
1489                         errcnt++;
1490                         if (errcnt >= 3)
1491                                 break;
1492                 }
1493         }
1494
1495         return ret;
1496 }
1497
1498 /**
1499  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1500  *     looking at all data.
1501  */
1502 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1503                                  u32 len)
1504 {
1505         u32 val;
1506         u32 save_len = len;
1507         int ret = 0;
1508         u32 errcnt;
1509
1510         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1511
1512         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1513                            IWL49_RTC_INST_LOWER_BOUND);
1514
1515         errcnt = 0;
1516         for (; len > 0; len -= sizeof(u32), image++) {
1517                 /* read data comes through single port, auto-incr addr */
1518                 /* NOTE: Use the debugless read so we don't flood kernel log
1519                  * if IWL_DL_IO is set */
1520                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1521                 if (val != le32_to_cpu(*image)) {
1522                         IWL_ERR(priv, "uCode INST section is invalid at "
1523                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1524                                   save_len - len, val, le32_to_cpu(*image));
1525                         ret = -EIO;
1526                         errcnt++;
1527                         if (errcnt >= 20)
1528                                 break;
1529                 }
1530         }
1531
1532         if (!errcnt)
1533                 IWL_DEBUG_INFO(priv,
1534                     "ucode image in INSTRUCTION memory is good\n");
1535
1536         return ret;
1537 }
1538
1539 /**
1540  * iwl_verify_ucode - determine which instruction image is in SRAM,
1541  *    and verify its contents
1542  */
1543 int iwl_verify_ucode(struct iwl_priv *priv)
1544 {
1545         __le32 *image;
1546         u32 len;
1547         int ret;
1548
1549         /* Try bootstrap */
1550         image = (__le32 *)priv->ucode_boot.v_addr;
1551         len = priv->ucode_boot.len;
1552         ret = iwlcore_verify_inst_sparse(priv, image, len);
1553         if (!ret) {
1554                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1555                 return 0;
1556         }
1557
1558         /* Try initialize */
1559         image = (__le32 *)priv->ucode_init.v_addr;
1560         len = priv->ucode_init.len;
1561         ret = iwlcore_verify_inst_sparse(priv, image, len);
1562         if (!ret) {
1563                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1564                 return 0;
1565         }
1566
1567         /* Try runtime/protocol */
1568         image = (__le32 *)priv->ucode_code.v_addr;
1569         len = priv->ucode_code.len;
1570         ret = iwlcore_verify_inst_sparse(priv, image, len);
1571         if (!ret) {
1572                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1573                 return 0;
1574         }
1575
1576         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1577
1578         /* Since nothing seems to match, show first several data entries in
1579          * instruction SRAM, so maybe visual inspection will give a clue.
1580          * Selection of bootstrap image (vs. other images) is arbitrary. */
1581         image = (__le32 *)priv->ucode_boot.v_addr;
1582         len = priv->ucode_boot.len;
1583         ret = iwl_verify_inst_full(priv, image, len);
1584
1585         return ret;
1586 }
1587 EXPORT_SYMBOL(iwl_verify_ucode);
1588
1589
1590 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1591 {
1592         struct iwl_ct_kill_config cmd;
1593         struct iwl_ct_kill_throttling_config adv_cmd;
1594         unsigned long flags;
1595         int ret = 0;
1596
1597         spin_lock_irqsave(&priv->lock, flags);
1598         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1599                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1600         spin_unlock_irqrestore(&priv->lock, flags);
1601         priv->thermal_throttle.ct_kill_toggle = false;
1602
1603         if (priv->cfg->support_ct_kill_exit) {
1604                 adv_cmd.critical_temperature_enter =
1605                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1606                 adv_cmd.critical_temperature_exit =
1607                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1608
1609                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1610                                        sizeof(adv_cmd), &adv_cmd);
1611                 if (ret)
1612                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1613                 else
1614                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1615                                         "succeeded, "
1616                                         "critical temperature enter is %d,"
1617                                         "exit is %d\n",
1618                                        priv->hw_params.ct_kill_threshold,
1619                                        priv->hw_params.ct_kill_exit_threshold);
1620         } else {
1621                 cmd.critical_temperature_R =
1622                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1623
1624                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1625                                        sizeof(cmd), &cmd);
1626                 if (ret)
1627                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1628                 else
1629                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1630                                         "succeeded, "
1631                                         "critical temperature is %d\n",
1632                                         priv->hw_params.ct_kill_threshold);
1633         }
1634 }
1635 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1636
1637
1638 /*
1639  * CARD_STATE_CMD
1640  *
1641  * Use: Sets the device's internal card state to enable, disable, or halt
1642  *
1643  * When in the 'enable' state the card operates as normal.
1644  * When in the 'disable' state, the card enters into a low power mode.
1645  * When in the 'halt' state, the card is shut down and must be fully
1646  * restarted to come back on.
1647  */
1648 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1649 {
1650         struct iwl_host_cmd cmd = {
1651                 .id = REPLY_CARD_STATE_CMD,
1652                 .len = sizeof(u32),
1653                 .data = &flags,
1654                 .flags = meta_flag,
1655         };
1656
1657         return iwl_send_cmd(priv, &cmd);
1658 }
1659
1660 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1661                            struct iwl_rx_mem_buffer *rxb)
1662 {
1663 #ifdef CONFIG_IWLWIFI_DEBUG
1664         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1665         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1666         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1667                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1668 #endif
1669 }
1670 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1671
1672 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1673                                       struct iwl_rx_mem_buffer *rxb)
1674 {
1675         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1676         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1677         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1678                         "notification for %s:\n", len,
1679                         get_cmd_string(pkt->hdr.cmd));
1680         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1681 }
1682 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1683
1684 void iwl_rx_reply_error(struct iwl_priv *priv,
1685                         struct iwl_rx_mem_buffer *rxb)
1686 {
1687         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1688
1689         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1690                 "seq 0x%04X ser 0x%08X\n",
1691                 le32_to_cpu(pkt->u.err_resp.error_type),
1692                 get_cmd_string(pkt->u.err_resp.cmd_id),
1693                 pkt->u.err_resp.cmd_id,
1694                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1695                 le32_to_cpu(pkt->u.err_resp.error_info));
1696 }
1697 EXPORT_SYMBOL(iwl_rx_reply_error);
1698
1699 void iwl_clear_isr_stats(struct iwl_priv *priv)
1700 {
1701         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1702 }
1703
1704 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1705                            const struct ieee80211_tx_queue_params *params)
1706 {
1707         struct iwl_priv *priv = hw->priv;
1708         unsigned long flags;
1709         int q;
1710
1711         IWL_DEBUG_MAC80211(priv, "enter\n");
1712
1713         if (!iwl_is_ready_rf(priv)) {
1714                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1715                 return -EIO;
1716         }
1717
1718         if (queue >= AC_NUM) {
1719                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1720                 return 0;
1721         }
1722
1723         q = AC_NUM - 1 - queue;
1724
1725         spin_lock_irqsave(&priv->lock, flags);
1726
1727         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1728         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1729         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1730         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1731                         cpu_to_le16((params->txop * 32));
1732
1733         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1734
1735         spin_unlock_irqrestore(&priv->lock, flags);
1736
1737         IWL_DEBUG_MAC80211(priv, "leave\n");
1738         return 0;
1739 }
1740 EXPORT_SYMBOL(iwl_mac_conf_tx);
1741
1742 static void iwl_ht_conf(struct iwl_priv *priv,
1743                         struct ieee80211_vif *vif)
1744 {
1745         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1746         struct ieee80211_sta *sta;
1747         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1748
1749         IWL_DEBUG_MAC80211(priv, "enter:\n");
1750
1751         if (!ht_conf->is_ht)
1752                 return;
1753
1754         ht_conf->ht_protection =
1755                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1756         ht_conf->non_GF_STA_present =
1757                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1758
1759         ht_conf->single_chain_sufficient = false;
1760
1761         switch (vif->type) {
1762         case NL80211_IFTYPE_STATION:
1763                 rcu_read_lock();
1764                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1765                 if (sta) {
1766                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1767                         int maxstreams;
1768
1769                         maxstreams = (ht_cap->mcs.tx_params &
1770                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1771                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1772                         maxstreams += 1;
1773
1774                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1775                             (ht_cap->mcs.rx_mask[2] == 0))
1776                                 ht_conf->single_chain_sufficient = true;
1777                         if (maxstreams <= 1)
1778                                 ht_conf->single_chain_sufficient = true;
1779                 } else {
1780                         /*
1781                          * If at all, this can only happen through a race
1782                          * when the AP disconnects us while we're still
1783                          * setting up the connection, in that case mac80211
1784                          * will soon tell us about that.
1785                          */
1786                         ht_conf->single_chain_sufficient = true;
1787                 }
1788                 rcu_read_unlock();
1789                 break;
1790         case NL80211_IFTYPE_ADHOC:
1791                 ht_conf->single_chain_sufficient = true;
1792                 break;
1793         default:
1794                 break;
1795         }
1796
1797         IWL_DEBUG_MAC80211(priv, "leave\n");
1798 }
1799
1800 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1801 {
1802         iwl_led_disassociate(priv);
1803         /*
1804          * inform the ucode that there is no longer an
1805          * association and that no more packets should be
1806          * sent
1807          */
1808         priv->staging_rxon.filter_flags &=
1809                 ~RXON_FILTER_ASSOC_MSK;
1810         priv->staging_rxon.assoc_id = 0;
1811         iwlcore_commit_rxon(priv);
1812 }
1813
1814 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1815                           struct ieee80211_vif *vif,
1816                           struct ieee80211_bss_conf *bss_conf,
1817                           u32 changes)
1818 {
1819         struct iwl_priv *priv = hw->priv;
1820         int ret;
1821
1822         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1823
1824         if (!iwl_is_alive(priv))
1825                 return;
1826
1827         mutex_lock(&priv->mutex);
1828
1829         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1830                 dev_kfree_skb(priv->ibss_beacon);
1831                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1832         }
1833
1834         if (changes & BSS_CHANGED_BEACON_INT) {
1835                 /* TODO: in AP mode, do something to make this take effect */
1836         }
1837
1838         if (changes & BSS_CHANGED_BSSID) {
1839                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1840
1841                 /*
1842                  * If there is currently a HW scan going on in the
1843                  * background then we need to cancel it else the RXON
1844                  * below/in post_associate will fail.
1845                  */
1846                 if (iwl_scan_cancel_timeout(priv, 100)) {
1847                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1848                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1849                         mutex_unlock(&priv->mutex);
1850                         return;
1851                 }
1852
1853                 /* mac80211 only sets assoc when in STATION mode */
1854                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1855                         memcpy(priv->staging_rxon.bssid_addr,
1856                                bss_conf->bssid, ETH_ALEN);
1857
1858                         /* currently needed in a few places */
1859                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1860                 } else {
1861                         priv->staging_rxon.filter_flags &=
1862                                 ~RXON_FILTER_ASSOC_MSK;
1863                 }
1864
1865         }
1866
1867         /*
1868          * This needs to be after setting the BSSID in case
1869          * mac80211 decides to do both changes at once because
1870          * it will invoke post_associate.
1871          */
1872         if (vif->type == NL80211_IFTYPE_ADHOC &&
1873             changes & BSS_CHANGED_BEACON) {
1874                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1875
1876                 if (beacon)
1877                         iwl_mac_beacon_update(hw, beacon);
1878         }
1879
1880         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1881                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1882                                    bss_conf->use_short_preamble);
1883                 if (bss_conf->use_short_preamble)
1884                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1885                 else
1886                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1887         }
1888
1889         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1890                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1891                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1892                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1893                 else
1894                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1895         }
1896
1897         if (changes & BSS_CHANGED_BASIC_RATES) {
1898                 /* XXX use this information
1899                  *
1900                  * To do that, remove code from iwl_set_rate() and put something
1901                  * like this here:
1902                  *
1903                 if (A-band)
1904                         priv->staging_rxon.ofdm_basic_rates =
1905                                 bss_conf->basic_rates;
1906                 else
1907                         priv->staging_rxon.ofdm_basic_rates =
1908                                 bss_conf->basic_rates >> 4;
1909                         priv->staging_rxon.cck_basic_rates =
1910                                 bss_conf->basic_rates & 0xF;
1911                  */
1912         }
1913
1914         if (changes & BSS_CHANGED_HT) {
1915                 iwl_ht_conf(priv, vif);
1916
1917                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1918                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1919         }
1920
1921         if (changes & BSS_CHANGED_ASSOC) {
1922                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1923                 if (bss_conf->assoc) {
1924                         priv->timestamp = bss_conf->timestamp;
1925
1926                         iwl_led_associate(priv);
1927
1928                         if (!iwl_is_rfkill(priv))
1929                                 priv->cfg->ops->lib->post_associate(priv, vif);
1930                 } else
1931                         iwl_set_no_assoc(priv);
1932         }
1933
1934         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1935                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1936                                    changes);
1937                 ret = iwl_send_rxon_assoc(priv);
1938                 if (!ret) {
1939                         /* Sync active_rxon with latest change. */
1940                         memcpy((void *)&priv->active_rxon,
1941                                 &priv->staging_rxon,
1942                                 sizeof(struct iwl_rxon_cmd));
1943                 }
1944         }
1945
1946         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1947                 if (vif->bss_conf.enable_beacon) {
1948                         memcpy(priv->staging_rxon.bssid_addr,
1949                                bss_conf->bssid, ETH_ALEN);
1950                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1951                         iwlcore_config_ap(priv, vif);
1952                 } else
1953                         iwl_set_no_assoc(priv);
1954         }
1955
1956         if (changes & BSS_CHANGED_IBSS) {
1957                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1958                                                         bss_conf->ibss_joined);
1959                 if (ret)
1960                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1961                                 bss_conf->ibss_joined ? "add" : "remove",
1962                                 bss_conf->bssid);
1963         }
1964
1965         mutex_unlock(&priv->mutex);
1966
1967         IWL_DEBUG_MAC80211(priv, "leave\n");
1968 }
1969 EXPORT_SYMBOL(iwl_bss_info_changed);
1970
1971 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1972 {
1973         struct iwl_priv *priv = hw->priv;
1974         unsigned long flags;
1975         __le64 timestamp;
1976
1977         IWL_DEBUG_MAC80211(priv, "enter\n");
1978
1979         if (!iwl_is_ready_rf(priv)) {
1980                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1981                 return -EIO;
1982         }
1983
1984         spin_lock_irqsave(&priv->lock, flags);
1985
1986         if (priv->ibss_beacon)
1987                 dev_kfree_skb(priv->ibss_beacon);
1988
1989         priv->ibss_beacon = skb;
1990
1991         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1992         priv->timestamp = le64_to_cpu(timestamp);
1993
1994         IWL_DEBUG_MAC80211(priv, "leave\n");
1995         spin_unlock_irqrestore(&priv->lock, flags);
1996
1997         priv->cfg->ops->lib->post_associate(priv, priv->vif);
1998
1999         return 0;
2000 }
2001 EXPORT_SYMBOL(iwl_mac_beacon_update);
2002
2003 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2004 {
2005         iwl_connection_init_rx_config(priv, vif);
2006
2007         if (priv->cfg->ops->hcmd->set_rxon_chain)
2008                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2009
2010         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2011
2012         return iwlcore_commit_rxon(priv);
2013 }
2014
2015 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2016 {
2017         struct iwl_priv *priv = hw->priv;
2018         int err = 0;
2019
2020         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2021
2022         mutex_lock(&priv->mutex);
2023
2024         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2025                 err = -EINVAL;
2026                 goto out;
2027         }
2028
2029         if (priv->vif) {
2030                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2031                 err = -EOPNOTSUPP;
2032                 goto out;
2033         }
2034
2035         priv->vif = vif;
2036         priv->iw_mode = vif->type;
2037
2038         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2039         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2040
2041         err = iwl_set_mode(priv, vif);
2042         if (err)
2043                 goto out_err;
2044
2045         goto out;
2046
2047  out_err:
2048         priv->vif = NULL;
2049         priv->iw_mode = NL80211_IFTYPE_STATION;
2050  out:
2051         mutex_unlock(&priv->mutex);
2052
2053         IWL_DEBUG_MAC80211(priv, "leave\n");
2054         return err;
2055 }
2056 EXPORT_SYMBOL(iwl_mac_add_interface);
2057
2058 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2059                               struct ieee80211_vif *vif)
2060 {
2061         struct iwl_priv *priv = hw->priv;
2062
2063         IWL_DEBUG_MAC80211(priv, "enter\n");
2064
2065         mutex_lock(&priv->mutex);
2066
2067         if (iwl_is_ready_rf(priv)) {
2068                 iwl_scan_cancel_timeout(priv, 100);
2069                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2070                 iwlcore_commit_rxon(priv);
2071         }
2072         if (priv->vif == vif) {
2073                 priv->vif = NULL;
2074                 memset(priv->bssid, 0, ETH_ALEN);
2075         }
2076         mutex_unlock(&priv->mutex);
2077
2078         IWL_DEBUG_MAC80211(priv, "leave\n");
2079
2080 }
2081 EXPORT_SYMBOL(iwl_mac_remove_interface);
2082
2083 /**
2084  * iwl_mac_config - mac80211 config callback
2085  */
2086 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2087 {
2088         struct iwl_priv *priv = hw->priv;
2089         const struct iwl_channel_info *ch_info;
2090         struct ieee80211_conf *conf = &hw->conf;
2091         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2092         unsigned long flags = 0;
2093         int ret = 0;
2094         u16 ch;
2095         int scan_active = 0;
2096
2097         mutex_lock(&priv->mutex);
2098
2099         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2100                                         conf->channel->hw_value, changed);
2101
2102         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2103                         test_bit(STATUS_SCANNING, &priv->status))) {
2104                 scan_active = 1;
2105                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2106         }
2107
2108         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2109                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2110                 /* mac80211 uses static for non-HT which is what we want */
2111                 priv->current_ht_config.smps = conf->smps_mode;
2112
2113                 /*
2114                  * Recalculate chain counts.
2115                  *
2116                  * If monitor mode is enabled then mac80211 will
2117                  * set up the SM PS mode to OFF if an HT channel is
2118                  * configured.
2119                  */
2120                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2121                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2122         }
2123
2124         /* during scanning mac80211 will delay channel setting until
2125          * scan finish with changed = 0
2126          */
2127         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2128                 if (scan_active)
2129                         goto set_ch_out;
2130
2131                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2132                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2133                 if (!is_channel_valid(ch_info)) {
2134                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2135                         ret = -EINVAL;
2136                         goto set_ch_out;
2137                 }
2138
2139                 spin_lock_irqsave(&priv->lock, flags);
2140
2141                 /* Configure HT40 channels */
2142                 ht_conf->is_ht = conf_is_ht(conf);
2143                 if (ht_conf->is_ht) {
2144                         if (conf_is_ht40_minus(conf)) {
2145                                 ht_conf->extension_chan_offset =
2146                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2147                                 ht_conf->is_40mhz = true;
2148                         } else if (conf_is_ht40_plus(conf)) {
2149                                 ht_conf->extension_chan_offset =
2150                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2151                                 ht_conf->is_40mhz = true;
2152                         } else {
2153                                 ht_conf->extension_chan_offset =
2154                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2155                                 ht_conf->is_40mhz = false;
2156                         }
2157                 } else
2158                         ht_conf->is_40mhz = false;
2159                 /* Default to no protection. Protection mode will later be set
2160                  * from BSS config in iwl_ht_conf */
2161                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2162
2163                 /* if we are switching from ht to 2.4 clear flags
2164                  * from any ht related info since 2.4 does not
2165                  * support ht */
2166                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2167                         priv->staging_rxon.flags = 0;
2168
2169                 iwl_set_rxon_channel(priv, conf->channel);
2170                 iwl_set_rxon_ht(priv, ht_conf);
2171
2172                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2173                 spin_unlock_irqrestore(&priv->lock, flags);
2174                 if (iwl_is_associated(priv) &&
2175                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2176                     priv->cfg->ops->lib->set_channel_switch) {
2177                         iwl_set_rate(priv);
2178                         /*
2179                          * at this point, staging_rxon has the
2180                          * configuration for channel switch
2181                          */
2182                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2183                                 ch);
2184                         if (!ret) {
2185                                 iwl_print_rx_config_cmd(priv);
2186                                 goto out;
2187                         }
2188                         priv->switch_rxon.switch_in_progress = false;
2189                 }
2190  set_ch_out:
2191                 /* The list of supported rates and rate mask can be different
2192                  * for each band; since the band may have changed, reset
2193                  * the rate mask to what mac80211 lists */
2194                 iwl_set_rate(priv);
2195         }
2196
2197         if (changed & (IEEE80211_CONF_CHANGE_PS |
2198                         IEEE80211_CONF_CHANGE_IDLE)) {
2199                 ret = iwl_power_update_mode(priv, false);
2200                 if (ret)
2201                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2202         }
2203
2204         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2205                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2206                         priv->tx_power_user_lmt, conf->power_level);
2207
2208                 iwl_set_tx_power(priv, conf->power_level, false);
2209         }
2210
2211         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2212                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2213
2214                 spin_lock_irqsave(&priv->lock, flags);
2215                 priv->qos_data.qos_active = qos_active;
2216                 iwl_update_qos(priv);
2217                 spin_unlock_irqrestore(&priv->lock, flags);
2218         }
2219
2220         if (!iwl_is_ready(priv)) {
2221                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2222                 goto out;
2223         }
2224
2225         if (scan_active)
2226                 goto out;
2227
2228         if (memcmp(&priv->active_rxon,
2229                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2230                 iwlcore_commit_rxon(priv);
2231         else
2232                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2233
2234
2235 out:
2236         IWL_DEBUG_MAC80211(priv, "leave\n");
2237         mutex_unlock(&priv->mutex);
2238         return ret;
2239 }
2240 EXPORT_SYMBOL(iwl_mac_config);
2241
2242 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2243 {
2244         struct iwl_priv *priv = hw->priv;
2245         unsigned long flags;
2246
2247         mutex_lock(&priv->mutex);
2248         IWL_DEBUG_MAC80211(priv, "enter\n");
2249
2250         spin_lock_irqsave(&priv->lock, flags);
2251         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2252         spin_unlock_irqrestore(&priv->lock, flags);
2253
2254         spin_lock_irqsave(&priv->lock, flags);
2255
2256         /* new association get rid of ibss beacon skb */
2257         if (priv->ibss_beacon)
2258                 dev_kfree_skb(priv->ibss_beacon);
2259
2260         priv->ibss_beacon = NULL;
2261
2262         priv->timestamp = 0;
2263
2264         spin_unlock_irqrestore(&priv->lock, flags);
2265
2266         if (!iwl_is_ready_rf(priv)) {
2267                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2268                 mutex_unlock(&priv->mutex);
2269                 return;
2270         }
2271
2272         /* we are restarting association process
2273          * clear RXON_FILTER_ASSOC_MSK bit
2274          */
2275         iwl_scan_cancel_timeout(priv, 100);
2276         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2277         iwlcore_commit_rxon(priv);
2278
2279         iwl_set_rate(priv);
2280
2281         mutex_unlock(&priv->mutex);
2282
2283         IWL_DEBUG_MAC80211(priv, "leave\n");
2284 }
2285 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2286
2287 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2288 {
2289         if (!priv->txq)
2290                 priv->txq = kzalloc(
2291                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2292                         GFP_KERNEL);
2293         if (!priv->txq) {
2294                 IWL_ERR(priv, "Not enough memory for txq\n");
2295                 return -ENOMEM;
2296         }
2297         return 0;
2298 }
2299 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2300
2301 void iwl_free_txq_mem(struct iwl_priv *priv)
2302 {
2303         kfree(priv->txq);
2304         priv->txq = NULL;
2305 }
2306 EXPORT_SYMBOL(iwl_free_txq_mem);
2307
2308 #ifdef CONFIG_IWLWIFI_DEBUGFS
2309
2310 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2311
2312 void iwl_reset_traffic_log(struct iwl_priv *priv)
2313 {
2314         priv->tx_traffic_idx = 0;
2315         priv->rx_traffic_idx = 0;
2316         if (priv->tx_traffic)
2317                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2318         if (priv->rx_traffic)
2319                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2320 }
2321
2322 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2323 {
2324         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2325
2326         if (iwl_debug_level & IWL_DL_TX) {
2327                 if (!priv->tx_traffic) {
2328                         priv->tx_traffic =
2329                                 kzalloc(traffic_size, GFP_KERNEL);
2330                         if (!priv->tx_traffic)
2331                                 return -ENOMEM;
2332                 }
2333         }
2334         if (iwl_debug_level & IWL_DL_RX) {
2335                 if (!priv->rx_traffic) {
2336                         priv->rx_traffic =
2337                                 kzalloc(traffic_size, GFP_KERNEL);
2338                         if (!priv->rx_traffic)
2339                                 return -ENOMEM;
2340                 }
2341         }
2342         iwl_reset_traffic_log(priv);
2343         return 0;
2344 }
2345 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2346
2347 void iwl_free_traffic_mem(struct iwl_priv *priv)
2348 {
2349         kfree(priv->tx_traffic);
2350         priv->tx_traffic = NULL;
2351
2352         kfree(priv->rx_traffic);
2353         priv->rx_traffic = NULL;
2354 }
2355 EXPORT_SYMBOL(iwl_free_traffic_mem);
2356
2357 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2358                       u16 length, struct ieee80211_hdr *header)
2359 {
2360         __le16 fc;
2361         u16 len;
2362
2363         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2364                 return;
2365
2366         if (!priv->tx_traffic)
2367                 return;
2368
2369         fc = header->frame_control;
2370         if (ieee80211_is_data(fc)) {
2371                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2372                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2373                 memcpy((priv->tx_traffic +
2374                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2375                        header, len);
2376                 priv->tx_traffic_idx =
2377                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2378         }
2379 }
2380 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2381
2382 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2383                       u16 length, struct ieee80211_hdr *header)
2384 {
2385         __le16 fc;
2386         u16 len;
2387
2388         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2389                 return;
2390
2391         if (!priv->rx_traffic)
2392                 return;
2393
2394         fc = header->frame_control;
2395         if (ieee80211_is_data(fc)) {
2396                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2397                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2398                 memcpy((priv->rx_traffic +
2399                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2400                        header, len);
2401                 priv->rx_traffic_idx =
2402                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2403         }
2404 }
2405 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2406
2407 const char *get_mgmt_string(int cmd)
2408 {
2409         switch (cmd) {
2410                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2411                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2412                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2413                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2414                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2415                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2416                 IWL_CMD(MANAGEMENT_BEACON);
2417                 IWL_CMD(MANAGEMENT_ATIM);
2418                 IWL_CMD(MANAGEMENT_DISASSOC);
2419                 IWL_CMD(MANAGEMENT_AUTH);
2420                 IWL_CMD(MANAGEMENT_DEAUTH);
2421                 IWL_CMD(MANAGEMENT_ACTION);
2422         default:
2423                 return "UNKNOWN";
2424
2425         }
2426 }
2427
2428 const char *get_ctrl_string(int cmd)
2429 {
2430         switch (cmd) {
2431                 IWL_CMD(CONTROL_BACK_REQ);
2432                 IWL_CMD(CONTROL_BACK);
2433                 IWL_CMD(CONTROL_PSPOLL);
2434                 IWL_CMD(CONTROL_RTS);
2435                 IWL_CMD(CONTROL_CTS);
2436                 IWL_CMD(CONTROL_ACK);
2437                 IWL_CMD(CONTROL_CFEND);
2438                 IWL_CMD(CONTROL_CFENDACK);
2439         default:
2440                 return "UNKNOWN";
2441
2442         }
2443 }
2444
2445 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2446 {
2447         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2448         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2449         priv->led_tpt = 0;
2450 }
2451
2452 /*
2453  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2454  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2455  * Use debugFs to display the rx/rx_statistics
2456  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2457  * information will be recorded, but DATA pkt still will be recorded
2458  * for the reason of iwl_led.c need to control the led blinking based on
2459  * number of tx and rx data.
2460  *
2461  */
2462 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2463 {
2464         struct traffic_stats    *stats;
2465
2466         if (is_tx)
2467                 stats = &priv->tx_stats;
2468         else
2469                 stats = &priv->rx_stats;
2470
2471         if (ieee80211_is_mgmt(fc)) {
2472                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2473                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2474                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2475                         break;
2476                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2477                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2478                         break;
2479                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2480                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2481                         break;
2482                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2483                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2484                         break;
2485                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2486                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2487                         break;
2488                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2489                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2490                         break;
2491                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2492                         stats->mgmt[MANAGEMENT_BEACON]++;
2493                         break;
2494                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2495                         stats->mgmt[MANAGEMENT_ATIM]++;
2496                         break;
2497                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2498                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2499                         break;
2500                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2501                         stats->mgmt[MANAGEMENT_AUTH]++;
2502                         break;
2503                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2504                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2505                         break;
2506                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2507                         stats->mgmt[MANAGEMENT_ACTION]++;
2508                         break;
2509                 }
2510         } else if (ieee80211_is_ctl(fc)) {
2511                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2512                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2513                         stats->ctrl[CONTROL_BACK_REQ]++;
2514                         break;
2515                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2516                         stats->ctrl[CONTROL_BACK]++;
2517                         break;
2518                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2519                         stats->ctrl[CONTROL_PSPOLL]++;
2520                         break;
2521                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2522                         stats->ctrl[CONTROL_RTS]++;
2523                         break;
2524                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2525                         stats->ctrl[CONTROL_CTS]++;
2526                         break;
2527                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2528                         stats->ctrl[CONTROL_ACK]++;
2529                         break;
2530                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2531                         stats->ctrl[CONTROL_CFEND]++;
2532                         break;
2533                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2534                         stats->ctrl[CONTROL_CFENDACK]++;
2535                         break;
2536                 }
2537         } else {
2538                 /* data */
2539                 stats->data_cnt++;
2540                 stats->data_bytes += len;
2541         }
2542         iwl_leds_background(priv);
2543 }
2544 EXPORT_SYMBOL(iwl_update_stats);
2545 #endif
2546
2547 const static char *get_csr_string(int cmd)
2548 {
2549         switch (cmd) {
2550                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2551                 IWL_CMD(CSR_INT_COALESCING);
2552                 IWL_CMD(CSR_INT);
2553                 IWL_CMD(CSR_INT_MASK);
2554                 IWL_CMD(CSR_FH_INT_STATUS);
2555                 IWL_CMD(CSR_GPIO_IN);
2556                 IWL_CMD(CSR_RESET);
2557                 IWL_CMD(CSR_GP_CNTRL);
2558                 IWL_CMD(CSR_HW_REV);
2559                 IWL_CMD(CSR_EEPROM_REG);
2560                 IWL_CMD(CSR_EEPROM_GP);
2561                 IWL_CMD(CSR_OTP_GP_REG);
2562                 IWL_CMD(CSR_GIO_REG);
2563                 IWL_CMD(CSR_GP_UCODE_REG);
2564                 IWL_CMD(CSR_GP_DRIVER_REG);
2565                 IWL_CMD(CSR_UCODE_DRV_GP1);
2566                 IWL_CMD(CSR_UCODE_DRV_GP2);
2567                 IWL_CMD(CSR_LED_REG);
2568                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2569                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2570                 IWL_CMD(CSR_ANA_PLL_CFG);
2571                 IWL_CMD(CSR_HW_REV_WA_REG);
2572                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2573         default:
2574                 return "UNKNOWN";
2575
2576         }
2577 }
2578
2579 void iwl_dump_csr(struct iwl_priv *priv)
2580 {
2581         int i;
2582         u32 csr_tbl[] = {
2583                 CSR_HW_IF_CONFIG_REG,
2584                 CSR_INT_COALESCING,
2585                 CSR_INT,
2586                 CSR_INT_MASK,
2587                 CSR_FH_INT_STATUS,
2588                 CSR_GPIO_IN,
2589                 CSR_RESET,
2590                 CSR_GP_CNTRL,
2591                 CSR_HW_REV,
2592                 CSR_EEPROM_REG,
2593                 CSR_EEPROM_GP,
2594                 CSR_OTP_GP_REG,
2595                 CSR_GIO_REG,
2596                 CSR_GP_UCODE_REG,
2597                 CSR_GP_DRIVER_REG,
2598                 CSR_UCODE_DRV_GP1,
2599                 CSR_UCODE_DRV_GP2,
2600                 CSR_LED_REG,
2601                 CSR_DRAM_INT_TBL_REG,
2602                 CSR_GIO_CHICKEN_BITS,
2603                 CSR_ANA_PLL_CFG,
2604                 CSR_HW_REV_WA_REG,
2605                 CSR_DBG_HPET_MEM_REG
2606         };
2607         IWL_ERR(priv, "CSR values:\n");
2608         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2609                 "CSR_INT_PERIODIC_REG)\n");
2610         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2611                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2612                         get_csr_string(csr_tbl[i]),
2613                         iwl_read32(priv, csr_tbl[i]));
2614         }
2615 }
2616 EXPORT_SYMBOL(iwl_dump_csr);
2617
2618 const static char *get_fh_string(int cmd)
2619 {
2620         switch (cmd) {
2621                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2622                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2623                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2624                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2625                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2626                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2627                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2628                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2629                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2630         default:
2631                 return "UNKNOWN";
2632
2633         }
2634 }
2635
2636 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2637 {
2638         int i;
2639 #ifdef CONFIG_IWLWIFI_DEBUG
2640         int pos = 0;
2641         size_t bufsz = 0;
2642 #endif
2643         u32 fh_tbl[] = {
2644                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2645                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2646                 FH_RSCSR_CHNL0_WPTR,
2647                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2648                 FH_MEM_RSSR_SHARED_CTRL_REG,
2649                 FH_MEM_RSSR_RX_STATUS_REG,
2650                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2651                 FH_TSSR_TX_STATUS_REG,
2652                 FH_TSSR_TX_ERROR_REG
2653         };
2654 #ifdef CONFIG_IWLWIFI_DEBUG
2655         if (display) {
2656                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2657                 *buf = kmalloc(bufsz, GFP_KERNEL);
2658                 if (!*buf)
2659                         return -ENOMEM;
2660                 pos += scnprintf(*buf + pos, bufsz - pos,
2661                                 "FH register values:\n");
2662                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2663                         pos += scnprintf(*buf + pos, bufsz - pos,
2664                                 "  %34s: 0X%08x\n",
2665                                 get_fh_string(fh_tbl[i]),
2666                                 iwl_read_direct32(priv, fh_tbl[i]));
2667                 }
2668                 return pos;
2669         }
2670 #endif
2671         IWL_ERR(priv, "FH register values:\n");
2672         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2673                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2674                         get_fh_string(fh_tbl[i]),
2675                         iwl_read_direct32(priv, fh_tbl[i]));
2676         }
2677         return 0;
2678 }
2679 EXPORT_SYMBOL(iwl_dump_fh);
2680
2681 static void iwl_force_rf_reset(struct iwl_priv *priv)
2682 {
2683         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2684                 return;
2685
2686         if (!iwl_is_associated(priv)) {
2687                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2688                 return;
2689         }
2690         /*
2691          * There is no easy and better way to force reset the radio,
2692          * the only known method is switching channel which will force to
2693          * reset and tune the radio.
2694          * Use internal short scan (single channel) operation to should
2695          * achieve this objective.
2696          * Driver should reset the radio when number of consecutive missed
2697          * beacon, or any other uCode error condition detected.
2698          */
2699         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2700         iwl_internal_short_hw_scan(priv);
2701 }
2702
2703
2704 int iwl_force_reset(struct iwl_priv *priv, int mode)
2705 {
2706         struct iwl_force_reset *force_reset;
2707
2708         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2709                 return -EINVAL;
2710
2711         if (mode >= IWL_MAX_FORCE_RESET) {
2712                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2713                 return -EINVAL;
2714         }
2715         force_reset = &priv->force_reset[mode];
2716         force_reset->reset_request_count++;
2717         if (force_reset->last_force_reset_jiffies &&
2718             time_after(force_reset->last_force_reset_jiffies +
2719             force_reset->reset_duration, jiffies)) {
2720                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2721                 force_reset->reset_reject_count++;
2722                 return -EAGAIN;
2723         }
2724         force_reset->reset_success_count++;
2725         force_reset->last_force_reset_jiffies = jiffies;
2726         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2727         switch (mode) {
2728         case IWL_RF_RESET:
2729                 iwl_force_rf_reset(priv);
2730                 break;
2731         case IWL_FW_RESET:
2732                 IWL_ERR(priv, "On demand firmware reload\n");
2733                 /* Set the FW error flag -- cleared on iwl_down */
2734                 set_bit(STATUS_FW_ERROR, &priv->status);
2735                 wake_up_interruptible(&priv->wait_command_queue);
2736                 /*
2737                  * Keep the restart process from trying to send host
2738                  * commands by clearing the INIT status bit
2739                  */
2740                 clear_bit(STATUS_READY, &priv->status);
2741                 queue_work(priv->workqueue, &priv->restart);
2742                 break;
2743         }
2744         return 0;
2745 }
2746 EXPORT_SYMBOL(iwl_force_reset);
2747
2748 /**
2749  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2750  *
2751  * During normal condition (no queue is stuck), the timer is continually set to
2752  * execute every monitor_recover_period milliseconds after the last timer
2753  * expired.  When the queue read_ptr is at the same place, the timer is
2754  * shorten to 100mSecs.  This is
2755  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2756  *      2) to detect the stuck queues quicker before the station and AP can
2757  *      disassociate each other.
2758  *
2759  * This function monitors all the tx queues and recover from it if any
2760  * of the queues are stuck.
2761  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2762  *      it will recover by resetting the firmware and return.
2763  * 2. Then, it checks for station association.  If it associates it will check
2764  *      other queues.  If any queue is stuck, it will recover by resetting
2765  *      the firmware.
2766  * Note: It the number of times the queue read_ptr to be at the same place to
2767  *      be MAX_REPEAT+1 in order to consider to be stuck.
2768  */
2769 /*
2770  * The maximum number of times the read pointer of the tx queue at the
2771  * same place without considering to be stuck.
2772  */
2773 #define MAX_REPEAT      (2)
2774 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2775 {
2776         struct iwl_tx_queue *txq;
2777         struct iwl_queue *q;
2778
2779         txq = &priv->txq[cnt];
2780         q = &txq->q;
2781         /* queue is empty, skip */
2782         if (q->read_ptr != q->write_ptr) {
2783                 if (q->read_ptr == q->last_read_ptr) {
2784                         /* a queue has not been read from last time */
2785                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2786                                 IWL_ERR(priv,
2787                                         "queue %d stuck %d time. Fw reload.\n",
2788                                         q->id, q->repeat_same_read_ptr);
2789                                 q->repeat_same_read_ptr = 0;
2790                                 iwl_force_reset(priv, IWL_FW_RESET);
2791                         } else {
2792                                 q->repeat_same_read_ptr++;
2793                                 IWL_DEBUG_RADIO(priv,
2794                                                 "queue %d, not read %d time\n",
2795                                                 q->id,
2796                                                 q->repeat_same_read_ptr);
2797                                 mod_timer(&priv->monitor_recover, jiffies +
2798                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2799                         }
2800                         return 1;
2801                 } else {
2802                         q->last_read_ptr = q->read_ptr;
2803                         q->repeat_same_read_ptr = 0;
2804                 }
2805         }
2806         return 0;
2807 }
2808
2809 void iwl_bg_monitor_recover(unsigned long data)
2810 {
2811         struct iwl_priv *priv = (struct iwl_priv *)data;
2812         int cnt;
2813
2814         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2815                 return;
2816
2817         /* monitor and check for stuck cmd queue */
2818         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2819                 return;
2820
2821         /* monitor and check for other stuck queues */
2822         if (iwl_is_associated(priv)) {
2823                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2824                         /* skip as we already checked the command queue */
2825                         if (cnt == IWL_CMD_QUEUE_NUM)
2826                                 continue;
2827                         if (iwl_check_stuck_queue(priv, cnt))
2828                                 return;
2829                 }
2830         }
2831         /*
2832          * Reschedule the timer to occur in
2833          * priv->cfg->monitor_recover_period
2834          */
2835         mod_timer(&priv->monitor_recover,
2836                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2837 }
2838 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2839
2840 #ifdef CONFIG_PM
2841
2842 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2843 {
2844         struct iwl_priv *priv = pci_get_drvdata(pdev);
2845
2846         /*
2847          * This function is called when system goes into suspend state
2848          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2849          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2850          * it will not call apm_ops.stop() to stop the DMA operation.
2851          * Calling apm_ops.stop here to make sure we stop the DMA.
2852          */
2853         priv->cfg->ops->lib->apm_ops.stop(priv);
2854
2855         pci_save_state(pdev);
2856         pci_disable_device(pdev);
2857         pci_set_power_state(pdev, PCI_D3hot);
2858
2859         return 0;
2860 }
2861 EXPORT_SYMBOL(iwl_pci_suspend);
2862
2863 int iwl_pci_resume(struct pci_dev *pdev)
2864 {
2865         struct iwl_priv *priv = pci_get_drvdata(pdev);
2866         int ret;
2867
2868         /*
2869          * We disable the RETRY_TIMEOUT register (0x41) to keep
2870          * PCI Tx retries from interfering with C3 CPU state.
2871          */
2872         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2873
2874         pci_set_power_state(pdev, PCI_D0);
2875         ret = pci_enable_device(pdev);
2876         if (ret)
2877                 return ret;
2878         pci_restore_state(pdev);
2879         iwl_enable_interrupts(priv);
2880
2881         return 0;
2882 }
2883 EXPORT_SYMBOL(iwl_pci_resume);
2884
2885 #endif /* CONFIG_PM */