SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h" /* FIXME: remove */
  37 #include "iwl-debug.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-power.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-helpers.h"
  43
  44
  45 MODULE_DESCRIPTION("iwl core");
  46 MODULE_VERSION(IWLWIFI_VERSION);
  47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * set bt_coex_active to true, uCode will do kill/defer
  52  * every time the priority line is asserted (BT is sending signals on the
  53  * priority line in the PCIx).
  54  * set bt_coex_active to false, uCode will ignore the BT activity and
  55  * perform the normal operation
  56  *
  57  * User might experience transmit issue on some platform due to WiFi/BT
  58  * co-exist problem. The possible behaviors are:
  59  *   Able to scan and finding all the available AP
  60  *   Not able to associate with any AP
  61  * On those platforms, WiFi communication can be restored by set
  62  * "bt_coex_active" module parameter to "false"
  63  *
  64  * default: bt_coex_active = true (BT_COEX_ENABLE)
  65  */
  66 static bool bt_coex_active = true;
  67 module_param(bt_coex_active, bool, S_IRUGO);
  68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  69
  70 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  71         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  72                                     IWL_RATE_SISO_##s##M_PLCP, \
  73                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  74                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  75                                     IWL_RATE_##r##M_IEEE,      \
  76                                     IWL_RATE_##ip##M_INDEX,    \
  77                                     IWL_RATE_##in##M_INDEX,    \
  78                                     IWL_RATE_##rp##M_INDEX,    \
  79                                     IWL_RATE_##rn##M_INDEX,    \
  80                                     IWL_RATE_##pp##M_INDEX,    \
  81                                     IWL_RATE_##np##M_INDEX }
  82
  83 u32 iwl_debug_level;
  84 EXPORT_SYMBOL(iwl_debug_level);
  85
  86 /*
  87  * Parameter order:
  88  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  89  *
  90  * If there isn't a valid next or previous rate then INV is used which
  91  * maps to IWL_RATE_INVALID
  92  *
  93  */
  94 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  95         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  96         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  97         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  98         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  99         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 100         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 101         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 102         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 103         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 104         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 105         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 106         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 107         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 108         /* FIXME:RS:          ^^    should be INV (legacy) */
 109 };
 110 EXPORT_SYMBOL(iwl_rates);
 111
 112 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 113 {
 114         int idx = 0;
 115
 116         /* HT rate format */
 117         if (rate_n_flags & RATE_MCS_HT_MSK) {
 118                 idx = (rate_n_flags & 0xff);
 119
 120                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 121                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 122                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 123                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 124
 125                 idx += IWL_FIRST_OFDM_RATE;
 126                 /* skip 9M not supported in ht*/
 127                 if (idx >= IWL_RATE_9M_INDEX)
 128                         idx += 1;
 129                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 130                         return idx;
 131
 132         /* legacy rate format, search for match in table */
 133         } else {
 134                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 135                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 136                                 return idx;
 137         }
 138
 139         return -1;
 140 }
 141 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 142
 143 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 144 {
 145         int i;
 146         u8 ind = ant;
 147         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 148                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 149                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 150                         return ind;
 151         }
 152         return ant;
 153 }
 154 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 155
 156 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 157 EXPORT_SYMBOL(iwl_bcast_addr);
 158
 159
 160 /* This function both allocates and initializes hw and priv. */
 161 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 162                 struct ieee80211_ops *hw_ops)
 163 {
 164         struct iwl_priv *priv;
 165
 166         /* mac80211 allocates memory for this device instance, including
 167          *   space for this driver's private structure */
 168         struct ieee80211_hw *hw =
 169                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 170         if (hw == NULL) {
 171                 printk(KERN_ERR "%s: Can not allocate network device\n",
 172                        cfg->name);
 173                 goto out;
 174         }
 175
 176         priv = hw->priv;
 177         priv->hw = hw;
 178
 179 out:
 180         return hw;
 181 }
 182 EXPORT_SYMBOL(iwl_alloc_all);
 183
 184 void iwl_hw_detect(struct iwl_priv *priv)
 185 {
 186         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 187         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 188         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 189 }
 190 EXPORT_SYMBOL(iwl_hw_detect);
 191
 192 /*
 193  * QoS  support
 194 */
 195 static void iwl_update_qos(struct iwl_priv *priv)
 196 {
 197         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 198                 return;
 199
 200         priv->qos_data.def_qos_parm.qos_flags = 0;
 201
 202         if (priv->qos_data.qos_active)
 203                 priv->qos_data.def_qos_parm.qos_flags |=
 204                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 205
 206         if (priv->current_ht_config.is_ht)
 207                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 208
 209         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 210                       priv->qos_data.qos_active,
 211                       priv->qos_data.def_qos_parm.qos_flags);
 212
 213         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 214                                sizeof(struct iwl_qosparam_cmd),
 215                                &priv->qos_data.def_qos_parm, NULL);
 216 }
 217
 218 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 219 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 220 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 221                               struct ieee80211_sta_ht_cap *ht_info,
 222                               enum ieee80211_band band)
 223 {
 224         u16 max_bit_rate = 0;
 225         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 226         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 227
 228         ht_info->cap = 0;
 229         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 230
 231         ht_info->ht_supported = true;
 232
 233         if (priv->cfg->ht_greenfield_support)
 234                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 235         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 236         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 237         if (priv->hw_params.ht40_channel & BIT(band)) {
 238                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 239                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 240                 ht_info->mcs.rx_mask[4] = 0x01;
 241                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 242         }
 243
 244         if (priv->cfg->mod_params->amsdu_size_8K)
 245                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 246
 247         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 248         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 249
 250         ht_info->mcs.rx_mask[0] = 0xFF;
 251         if (rx_chains_num >= 2)
 252                 ht_info->mcs.rx_mask[1] = 0xFF;
 253         if (rx_chains_num >= 3)
 254                 ht_info->mcs.rx_mask[2] = 0xFF;
 255
 256         /* Highest supported Rx data rate */
 257         max_bit_rate *= rx_chains_num;
 258         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 259         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 260
 261         /* Tx MCS capabilities */
 262         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 263         if (tx_chains_num != rx_chains_num) {
 264                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 265                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 266                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 267         }
 268 }
 269
 270 /**
 271  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 272  */
 273 int iwlcore_init_geos(struct iwl_priv *priv)
 274 {
 275         struct iwl_channel_info *ch;
 276         struct ieee80211_supported_band *sband;
 277         struct ieee80211_channel *channels;
 278         struct ieee80211_channel *geo_ch;
 279         struct ieee80211_rate *rates;
 280         int i = 0;
 281
 282         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 283             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 284                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 285                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 286                 return 0;
 287         }
 288
 289         channels = kzalloc(sizeof(struct ieee80211_channel) *
 290                            priv->channel_count, GFP_KERNEL);
 291         if (!channels)
 292                 return -ENOMEM;
 293
 294         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 295                         GFP_KERNEL);
 296         if (!rates) {
 297                 kfree(channels);
 298                 return -ENOMEM;
 299         }
 300
 301         /* 5.2GHz channels start after the 2.4GHz channels */
 302         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 303         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 304         /* just OFDM */
 305         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 306         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 307
 308         if (priv->cfg->sku & IWL_SKU_N)
 309                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 310                                          IEEE80211_BAND_5GHZ);
 311
 312         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 313         sband->channels = channels;
 314         /* OFDM & CCK */
 315         sband->bitrates = rates;
 316         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 317
 318         if (priv->cfg->sku & IWL_SKU_N)
 319                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 320                                          IEEE80211_BAND_2GHZ);
 321
 322         priv->ieee_channels = channels;
 323         priv->ieee_rates = rates;
 324
 325         for (i = 0;  i < priv->channel_count; i++) {
 326                 ch = &priv->channel_info[i];
 327
 328                 /* FIXME: might be removed if scan is OK */
 329                 if (!is_channel_valid(ch))
 330                         continue;
 331
 332                 if (is_channel_a_band(ch))
 333                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 334                 else
 335                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 336
 337                 geo_ch = &sband->channels[sband->n_channels++];
 338
 339                 geo_ch->center_freq =
 340                                 ieee80211_channel_to_frequency(ch->channel);
 341                 geo_ch->max_power = ch->max_power_avg;
 342                 geo_ch->max_antenna_gain = 0xff;
 343                 geo_ch->hw_value = ch->channel;
 344
 345                 if (is_channel_valid(ch)) {
 346                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 347                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 348
 349                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 350                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 351
 352                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 353                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 354
 355                         geo_ch->flags |= ch->ht40_extension_channel;
 356
 357                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 358                                 priv->tx_power_device_lmt = ch->max_power_avg;
 359                 } else {
 360                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 361                 }
 362
 363                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 364                                 ch->channel, geo_ch->center_freq,
 365                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 366                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 367                                 "restricted" : "valid",
 368                                  geo_ch->flags);
 369         }
 370
 371         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 372              priv->cfg->sku & IWL_SKU_A) {
 373                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 374                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 375                            priv->pci_dev->device,
 376                            priv->pci_dev->subsystem_device);
 377                 priv->cfg->sku &= ~IWL_SKU_A;
 378         }
 379
 380         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 381                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 382                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 383
 384         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 385
 386         return 0;
 387 }
 388 EXPORT_SYMBOL(iwlcore_init_geos);
 389
 390 /*
 391  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 392  */
 393 void iwlcore_free_geos(struct iwl_priv *priv)
 394 {
 395         kfree(priv->ieee_channels);
 396         kfree(priv->ieee_rates);
 397         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 398 }
 399 EXPORT_SYMBOL(iwlcore_free_geos);
 400
 401 /*
 402  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 403  *  function.
 404  */
 405 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 406                                 __le32 *tx_flags)
 407 {
 408         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 409                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 410                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 411         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 412                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 413                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 414         }
 415 }
 416 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 417
 418 static bool is_single_rx_stream(struct iwl_priv *priv)
 419 {
 420         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 421                priv->current_ht_config.single_chain_sufficient;
 422 }
 423
 424 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 425                                    enum ieee80211_band band,
 426                                    u16 channel, u8 extension_chan_offset)
 427 {
 428         const struct iwl_channel_info *ch_info;
 429
 430         ch_info = iwl_get_channel_info(priv, band, channel);
 431         if (!is_channel_valid(ch_info))
 432                 return 0;
 433
 434         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 435                 return !(ch_info->ht40_extension_channel &
 436                                         IEEE80211_CHAN_NO_HT40PLUS);
 437         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 438                 return !(ch_info->ht40_extension_channel &
 439                                         IEEE80211_CHAN_NO_HT40MINUS);
 440
 441         return 0;
 442 }
 443
 444 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 445                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 446 {
 447         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 448
 449         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 450                 return 0;
 451
 452         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 453          * the bit will not set if it is pure 40MHz case
 454          */
 455         if (sta_ht_inf) {
 456                 if (!sta_ht_inf->ht_supported)
 457                         return 0;
 458         }
 459 #ifdef CONFIG_IWLWIFI_DEBUG
 460         if (priv->disable_ht40)
 461                 return 0;
 462 #endif
 463         return iwl_is_channel_extension(priv, priv->band,
 464                         le16_to_cpu(priv->staging_rxon.channel),
 465                         ht_conf->extension_chan_offset);
 466 }
 467 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 468
 469 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 470 {
 471         u16 new_val = 0;
 472         u16 beacon_factor = 0;
 473
 474         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 475         new_val = beacon_val / beacon_factor;
 476
 477         if (!new_val)
 478                 new_val = max_beacon_val;
 479
 480         return new_val;
 481 }
 482
 483 void iwl_setup_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif)
 484 {
 485         u64 tsf;
 486         s32 interval_tm, rem;
 487         unsigned long flags;
 488         struct ieee80211_conf *conf = NULL;
 489         u16 beacon_int;
 490
 491         conf = ieee80211_get_hw_conf(priv->hw);
 492
 493         spin_lock_irqsave(&priv->lock, flags);
 494         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 495         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 496
 497         beacon_int = vif->bss_conf.beacon_int;
 498
 499         if (vif->type == NL80211_IFTYPE_ADHOC) {
 500                 /* TODO: we need to get atim_window from upper stack
 501                  * for now we set to 0 */
 502                 priv->rxon_timing.atim_window = 0;
 503         } else {
 504                 priv->rxon_timing.atim_window = 0;
 505         }
 506
 507         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 508                                 priv->hw_params.max_beacon_itrvl * 1024);
 509         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 510
 511         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 512         interval_tm = beacon_int * 1024;
 513         rem = do_div(tsf, interval_tm);
 514         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 515
 516         spin_unlock_irqrestore(&priv->lock, flags);
 517         IWL_DEBUG_ASSOC(priv,
 518                         "beacon interval %d beacon timer %d beacon tim %d\n",
 519                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 520                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 521                         le16_to_cpu(priv->rxon_timing.atim_window));
 522 }
 523 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 524
 525 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 526 {
 527         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 528
 529         if (hw_decrypt)
 530                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 531         else
 532                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 533
 534 }
 535 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 536
 537 /**
 538  * iwl_check_rxon_cmd - validate RXON structure is valid
 539  *
 540  * NOTE:  This is really only useful during development and can eventually
 541  * be #ifdef'd out once the driver is stable and folks aren't actively
 542  * making changes
 543  */
 544 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 545 {
 546         int error = 0;
 547         int counter = 1;
 548         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 549
 550         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 551                 error |= le32_to_cpu(rxon->flags &
 552                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 553                                  RXON_FLG_RADAR_DETECT_MSK));
 554                 if (error)
 555                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 556                                     counter++, error);
 557         } else {
 558                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 559                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 560                 if (error)
 561                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 562                                     counter++, error);
 563                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 564                 if (error)
 565                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 566                                     counter++, error);
 567         }
 568         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 569         if (error)
 570                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 571
 572         /* make sure basic rates 6Mbps and 1Mbps are supported */
 573         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 574                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 575         if (error)
 576                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 577
 578         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 579         if (error)
 580                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 581
 582         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 583                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 584         if (error)
 585                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 586                             counter++, error);
 587
 588         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 589                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 590         if (error)
 591                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 592                             counter++, error);
 593
 594         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 595                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 596         if (error)
 597                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 598                             counter++, error);
 599
 600         if (error)
 601                 IWL_WARN(priv, "Tuning to channel %d\n",
 602                             le16_to_cpu(rxon->channel));
 603
 604         if (error) {
 605                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 606                 return -1;
 607         }
 608         return 0;
 609 }
 610 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 611
 612 /**
 613  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 614  * @priv: staging_rxon is compared to active_rxon
 615  *
 616  * If the RXON structure is changing enough to require a new tune,
 617  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 618  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 619  */
 620 int iwl_full_rxon_required(struct iwl_priv *priv)
 621 {
 622
 623         /* These items are only settable from the full RXON command */
 624         if (!(iwl_is_associated(priv)) ||
 625             compare_ether_addr(priv->staging_rxon.bssid_addr,
 626                                priv->active_rxon.bssid_addr) ||
 627             compare_ether_addr(priv->staging_rxon.node_addr,
 628                                priv->active_rxon.node_addr) ||
 629             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 630                                priv->active_rxon.wlap_bssid_addr) ||
 631             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 632             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 633             (priv->staging_rxon.air_propagation !=
 634              priv->active_rxon.air_propagation) ||
 635             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 636              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 637             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 638              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 639             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 640              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 641             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 642                 return 1;
 643
 644         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 645          * be updated with the RXON_ASSOC command -- however only some
 646          * flag transitions are allowed using RXON_ASSOC */
 647
 648         /* Check if we are not switching bands */
 649         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 650             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 651                 return 1;
 652
 653         /* Check if we are switching association toggle */
 654         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 655                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 656                 return 1;
 657
 658         return 0;
 659 }
 660 EXPORT_SYMBOL(iwl_full_rxon_required);
 661
 662 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 663 {
 664         /*
 665          * Assign the lowest rate -- should really get this from
 666          * the beacon skb from mac80211.
 667          */
 668         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 669                 return IWL_RATE_1M_PLCP;
 670         else
 671                 return IWL_RATE_6M_PLCP;
 672 }
 673 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 674
 675 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 676 {
 677         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 678
 679         if (!ht_conf->is_ht) {
 680                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 681                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 682                         RXON_FLG_HT40_PROT_MSK |
 683                         RXON_FLG_HT_PROT_MSK);
 684                 return;
 685         }
 686
 687         /* FIXME: if the definition of ht_protection changed, the "translation"
 688          * will be needed for rxon->flags
 689          */
 690         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 691
 692         /* Set up channel bandwidth:
 693          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 694         /* clear the HT channel mode before set the mode */
 695         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 696                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 697         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 698                 /* pure ht40 */
 699                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 700                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 701                         /* Note: control channel is opposite of extension channel */
 702                         switch (ht_conf->extension_chan_offset) {
 703                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 704                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 705                                 break;
 706                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 707                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 708                                 break;
 709                         }
 710                 } else {
 711                         /* Note: control channel is opposite of extension channel */
 712                         switch (ht_conf->extension_chan_offset) {
 713                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 714                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 715                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 716                                 break;
 717                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 718                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 719                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 720                                 break;
 721                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 722                         default:
 723                                 /* channel location only valid if in Mixed mode */
 724                                 IWL_ERR(priv, "invalid extension channel offset\n");
 725                                 break;
 726                         }
 727                 }
 728         } else {
 729                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 730         }
 731
 732         if (priv->cfg->ops->hcmd->set_rxon_chain)
 733                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 734
 735         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 736                         "extension channel offset 0x%x\n",
 737                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 738                         ht_conf->extension_chan_offset);
 739         return;
 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_bss_conf *bss_conf)
1744 {
1745         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1746         struct ieee80211_sta *sta;
1747
1748         IWL_DEBUG_MAC80211(priv, "enter:\n");
1749
1750         if (!ht_conf->is_ht)
1751                 return;
1752
1753         ht_conf->ht_protection =
1754                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1755         ht_conf->non_GF_STA_present =
1756                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1757
1758         ht_conf->single_chain_sufficient = false;
1759
1760         switch (priv->iw_mode) {
1761         case NL80211_IFTYPE_STATION:
1762                 rcu_read_lock();
1763                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1764                 if (sta) {
1765                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1766                         int maxstreams;
1767
1768                         maxstreams = (ht_cap->mcs.tx_params &
1769                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1770                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1771                         maxstreams += 1;
1772
1773                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1774                             (ht_cap->mcs.rx_mask[2] == 0))
1775                                 ht_conf->single_chain_sufficient = true;
1776                         if (maxstreams <= 1)
1777                                 ht_conf->single_chain_sufficient = true;
1778                 } else {
1779                         /*
1780                          * If at all, this can only happen through a race
1781                          * when the AP disconnects us while we're still
1782                          * setting up the connection, in that case mac80211
1783                          * will soon tell us about that.
1784                          */
1785                         ht_conf->single_chain_sufficient = true;
1786                 }
1787                 rcu_read_unlock();
1788                 break;
1789         case NL80211_IFTYPE_ADHOC:
1790                 ht_conf->single_chain_sufficient = true;
1791                 break;
1792         default:
1793                 break;
1794         }
1795
1796         IWL_DEBUG_MAC80211(priv, "leave\n");
1797 }
1798
1799 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1800 {
1801         iwl_led_disassociate(priv);
1802         /*
1803          * inform the ucode that there is no longer an
1804          * association and that no more packets should be
1805          * sent
1806          */
1807         priv->staging_rxon.filter_flags &=
1808                 ~RXON_FILTER_ASSOC_MSK;
1809         priv->staging_rxon.assoc_id = 0;
1810         iwlcore_commit_rxon(priv);
1811 }
1812
1813 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1814                           struct ieee80211_vif *vif,
1815                           struct ieee80211_bss_conf *bss_conf,
1816                           u32 changes)
1817 {
1818         struct iwl_priv *priv = hw->priv;
1819         int ret;
1820
1821         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1822
1823         if (!iwl_is_alive(priv))
1824                 return;
1825
1826         mutex_lock(&priv->mutex);
1827
1828         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1829                 dev_kfree_skb(priv->ibss_beacon);
1830                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1831         }
1832
1833         if (changes & BSS_CHANGED_BEACON_INT) {
1834                 /* TODO: in AP mode, do something to make this take effect */
1835         }
1836
1837         if (changes & BSS_CHANGED_BSSID) {
1838                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1839
1840                 /*
1841                  * If there is currently a HW scan going on in the
1842                  * background then we need to cancel it else the RXON
1843                  * below/in post_associate will fail.
1844                  */
1845                 if (iwl_scan_cancel_timeout(priv, 100)) {
1846                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1847                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1848                         mutex_unlock(&priv->mutex);
1849                         return;
1850                 }
1851
1852                 /* mac80211 only sets assoc when in STATION mode */
1853                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1854                         memcpy(priv->staging_rxon.bssid_addr,
1855                                bss_conf->bssid, ETH_ALEN);
1856
1857                         /* currently needed in a few places */
1858                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1859                 } else {
1860                         priv->staging_rxon.filter_flags &=
1861                                 ~RXON_FILTER_ASSOC_MSK;
1862                 }
1863
1864         }
1865
1866         /*
1867          * This needs to be after setting the BSSID in case
1868          * mac80211 decides to do both changes at once because
1869          * it will invoke post_associate.
1870          */
1871         if (vif->type == NL80211_IFTYPE_ADHOC &&
1872             changes & BSS_CHANGED_BEACON) {
1873                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1874
1875                 if (beacon)
1876                         iwl_mac_beacon_update(hw, beacon);
1877         }
1878
1879         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1880                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1881                                    bss_conf->use_short_preamble);
1882                 if (bss_conf->use_short_preamble)
1883                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1884                 else
1885                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1886         }
1887
1888         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1889                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1890                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1891                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1892                 else
1893                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1894         }
1895
1896         if (changes & BSS_CHANGED_BASIC_RATES) {
1897                 /* XXX use this information
1898                  *
1899                  * To do that, remove code from iwl_set_rate() and put something
1900                  * like this here:
1901                  *
1902                 if (A-band)
1903                         priv->staging_rxon.ofdm_basic_rates =
1904                                 bss_conf->basic_rates;
1905                 else
1906                         priv->staging_rxon.ofdm_basic_rates =
1907                                 bss_conf->basic_rates >> 4;
1908                         priv->staging_rxon.cck_basic_rates =
1909                                 bss_conf->basic_rates & 0xF;
1910                  */
1911         }
1912
1913         if (changes & BSS_CHANGED_HT) {
1914                 iwl_ht_conf(priv, bss_conf);
1915
1916                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1917                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1918         }
1919
1920         if (changes & BSS_CHANGED_ASSOC) {
1921                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1922                 if (bss_conf->assoc) {
1923                         priv->timestamp = bss_conf->timestamp;
1924
1925                         iwl_led_associate(priv);
1926
1927                         if (!iwl_is_rfkill(priv))
1928                                 priv->cfg->ops->lib->post_associate(priv, vif);
1929                 } else
1930                         iwl_set_no_assoc(priv);
1931         }
1932
1933         if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1934                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1935                                    changes);
1936                 ret = iwl_send_rxon_assoc(priv);
1937                 if (!ret) {
1938                         /* Sync active_rxon with latest change. */
1939                         memcpy((void *)&priv->active_rxon,
1940                                 &priv->staging_rxon,
1941                                 sizeof(struct iwl_rxon_cmd));
1942                 }
1943         }
1944
1945         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1946                 if (vif->bss_conf.enable_beacon) {
1947                         memcpy(priv->staging_rxon.bssid_addr,
1948                                bss_conf->bssid, ETH_ALEN);
1949                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1950                         iwlcore_config_ap(priv, vif);
1951                 } else
1952                         iwl_set_no_assoc(priv);
1953         }
1954
1955         if (changes & BSS_CHANGED_IBSS) {
1956                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1957                                                         bss_conf->ibss_joined);
1958                 if (ret)
1959                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1960                                 bss_conf->ibss_joined ? "add" : "remove",
1961                                 bss_conf->bssid);
1962         }
1963
1964         mutex_unlock(&priv->mutex);
1965
1966         IWL_DEBUG_MAC80211(priv, "leave\n");
1967 }
1968 EXPORT_SYMBOL(iwl_bss_info_changed);
1969
1970 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1971 {
1972         struct iwl_priv *priv = hw->priv;
1973         unsigned long flags;
1974         __le64 timestamp;
1975
1976         IWL_DEBUG_MAC80211(priv, "enter\n");
1977
1978         if (!iwl_is_ready_rf(priv)) {
1979                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1980                 return -EIO;
1981         }
1982
1983         spin_lock_irqsave(&priv->lock, flags);
1984
1985         if (priv->ibss_beacon)
1986                 dev_kfree_skb(priv->ibss_beacon);
1987
1988         priv->ibss_beacon = skb;
1989
1990         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1991         priv->timestamp = le64_to_cpu(timestamp);
1992
1993         IWL_DEBUG_MAC80211(priv, "leave\n");
1994         spin_unlock_irqrestore(&priv->lock, flags);
1995
1996         priv->cfg->ops->lib->post_associate(priv, priv->vif);
1997
1998         return 0;
1999 }
2000 EXPORT_SYMBOL(iwl_mac_beacon_update);
2001
2002 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2003 {
2004         iwl_connection_init_rx_config(priv, vif);
2005
2006         if (priv->cfg->ops->hcmd->set_rxon_chain)
2007                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2008
2009         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2010
2011         return iwlcore_commit_rxon(priv);
2012 }
2013
2014 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2015 {
2016         struct iwl_priv *priv = hw->priv;
2017         int err = 0;
2018
2019         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2020
2021         mutex_lock(&priv->mutex);
2022
2023         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2024                 err = -EINVAL;
2025                 goto out;
2026         }
2027
2028         if (priv->vif) {
2029                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2030                 err = -EOPNOTSUPP;
2031                 goto out;
2032         }
2033
2034         priv->vif = vif;
2035         priv->iw_mode = vif->type;
2036
2037         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2038         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2039
2040         err = iwl_set_mode(priv, vif);
2041         if (err)
2042                 goto out_err;
2043
2044         /* Add the broadcast address so we can send broadcast frames */
2045         err = priv->cfg->ops->lib->add_bcast_station(priv);
2046         if (err)
2047                 goto out_err;
2048
2049         goto out;
2050
2051  out_err:
2052         priv->vif = NULL;
2053         priv->iw_mode = NL80211_IFTYPE_STATION;
2054  out:
2055         mutex_unlock(&priv->mutex);
2056
2057         IWL_DEBUG_MAC80211(priv, "leave\n");
2058         return err;
2059 }
2060 EXPORT_SYMBOL(iwl_mac_add_interface);
2061
2062 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2063                               struct ieee80211_vif *vif)
2064 {
2065         struct iwl_priv *priv = hw->priv;
2066
2067         IWL_DEBUG_MAC80211(priv, "enter\n");
2068
2069         mutex_lock(&priv->mutex);
2070
2071         iwl_clear_ucode_stations(priv, true);
2072
2073         if (iwl_is_ready_rf(priv)) {
2074                 iwl_scan_cancel_timeout(priv, 100);
2075                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2076                 iwlcore_commit_rxon(priv);
2077         }
2078         if (priv->vif == vif) {
2079                 priv->vif = NULL;
2080                 memset(priv->bssid, 0, ETH_ALEN);
2081         }
2082         mutex_unlock(&priv->mutex);
2083
2084         IWL_DEBUG_MAC80211(priv, "leave\n");
2085
2086 }
2087 EXPORT_SYMBOL(iwl_mac_remove_interface);
2088
2089 /**
2090  * iwl_mac_config - mac80211 config callback
2091  */
2092 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2093 {
2094         struct iwl_priv *priv = hw->priv;
2095         const struct iwl_channel_info *ch_info;
2096         struct ieee80211_conf *conf = &hw->conf;
2097         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2098         unsigned long flags = 0;
2099         int ret = 0;
2100         u16 ch;
2101         int scan_active = 0;
2102
2103         mutex_lock(&priv->mutex);
2104
2105         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2106                                         conf->channel->hw_value, changed);
2107
2108         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2109                         test_bit(STATUS_SCANNING, &priv->status))) {
2110                 scan_active = 1;
2111                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2112         }
2113
2114         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2115                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2116                 /* mac80211 uses static for non-HT which is what we want */
2117                 priv->current_ht_config.smps = conf->smps_mode;
2118
2119                 /*
2120                  * Recalculate chain counts.
2121                  *
2122                  * If monitor mode is enabled then mac80211 will
2123                  * set up the SM PS mode to OFF if an HT channel is
2124                  * configured.
2125                  */
2126                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2127                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2128         }
2129
2130         /* during scanning mac80211 will delay channel setting until
2131          * scan finish with changed = 0
2132          */
2133         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2134                 if (scan_active)
2135                         goto set_ch_out;
2136
2137                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2138                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2139                 if (!is_channel_valid(ch_info)) {
2140                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2141                         ret = -EINVAL;
2142                         goto set_ch_out;
2143                 }
2144
2145                 spin_lock_irqsave(&priv->lock, flags);
2146
2147                 /* Configure HT40 channels */
2148                 ht_conf->is_ht = conf_is_ht(conf);
2149                 if (ht_conf->is_ht) {
2150                         if (conf_is_ht40_minus(conf)) {
2151                                 ht_conf->extension_chan_offset =
2152                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2153                                 ht_conf->is_40mhz = true;
2154                         } else if (conf_is_ht40_plus(conf)) {
2155                                 ht_conf->extension_chan_offset =
2156                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2157                                 ht_conf->is_40mhz = true;
2158                         } else {
2159                                 ht_conf->extension_chan_offset =
2160                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2161                                 ht_conf->is_40mhz = false;
2162                         }
2163                 } else
2164                         ht_conf->is_40mhz = false;
2165                 /* Default to no protection. Protection mode will later be set
2166                  * from BSS config in iwl_ht_conf */
2167                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2168
2169                 /* if we are switching from ht to 2.4 clear flags
2170                  * from any ht related info since 2.4 does not
2171                  * support ht */
2172                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2173                         priv->staging_rxon.flags = 0;
2174
2175                 iwl_set_rxon_channel(priv, conf->channel);
2176                 iwl_set_rxon_ht(priv, ht_conf);
2177
2178                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2179                 spin_unlock_irqrestore(&priv->lock, flags);
2180                 if (iwl_is_associated(priv) &&
2181                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2182                     priv->cfg->ops->lib->set_channel_switch) {
2183                         iwl_set_rate(priv);
2184                         /*
2185                          * at this point, staging_rxon has the
2186                          * configuration for channel switch
2187                          */
2188                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2189                                 ch);
2190                         if (!ret) {
2191                                 iwl_print_rx_config_cmd(priv);
2192                                 goto out;
2193                         }
2194                         priv->switch_rxon.switch_in_progress = false;
2195                 }
2196  set_ch_out:
2197                 /* The list of supported rates and rate mask can be different
2198                  * for each band; since the band may have changed, reset
2199                  * the rate mask to what mac80211 lists */
2200                 iwl_set_rate(priv);
2201         }
2202
2203         if (changed & (IEEE80211_CONF_CHANGE_PS |
2204                         IEEE80211_CONF_CHANGE_IDLE)) {
2205                 ret = iwl_power_update_mode(priv, false);
2206                 if (ret)
2207                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2208         }
2209
2210         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2211                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2212                         priv->tx_power_user_lmt, conf->power_level);
2213
2214                 iwl_set_tx_power(priv, conf->power_level, false);
2215         }
2216
2217         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2218                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2219
2220                 spin_lock_irqsave(&priv->lock, flags);
2221                 priv->qos_data.qos_active = qos_active;
2222                 iwl_update_qos(priv);
2223                 spin_unlock_irqrestore(&priv->lock, flags);
2224         }
2225
2226         if (!iwl_is_ready(priv)) {
2227                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2228                 goto out;
2229         }
2230
2231         if (scan_active)
2232                 goto out;
2233
2234         if (memcmp(&priv->active_rxon,
2235                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2236                 iwlcore_commit_rxon(priv);
2237         else
2238                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2239
2240
2241 out:
2242         IWL_DEBUG_MAC80211(priv, "leave\n");
2243         mutex_unlock(&priv->mutex);
2244         return ret;
2245 }
2246 EXPORT_SYMBOL(iwl_mac_config);
2247
2248 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2249 {
2250         struct iwl_priv *priv = hw->priv;
2251         unsigned long flags;
2252
2253         mutex_lock(&priv->mutex);
2254         IWL_DEBUG_MAC80211(priv, "enter\n");
2255
2256         spin_lock_irqsave(&priv->lock, flags);
2257         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2258         spin_unlock_irqrestore(&priv->lock, flags);
2259
2260         spin_lock_irqsave(&priv->lock, flags);
2261
2262         /* new association get rid of ibss beacon skb */
2263         if (priv->ibss_beacon)
2264                 dev_kfree_skb(priv->ibss_beacon);
2265
2266         priv->ibss_beacon = NULL;
2267
2268         priv->timestamp = 0;
2269
2270         spin_unlock_irqrestore(&priv->lock, flags);
2271
2272         if (!iwl_is_ready_rf(priv)) {
2273                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2274                 mutex_unlock(&priv->mutex);
2275                 return;
2276         }
2277
2278         /* we are restarting association process
2279          * clear RXON_FILTER_ASSOC_MSK bit
2280          */
2281         iwl_scan_cancel_timeout(priv, 100);
2282         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2283         iwlcore_commit_rxon(priv);
2284
2285         iwl_set_rate(priv);
2286
2287         mutex_unlock(&priv->mutex);
2288
2289         IWL_DEBUG_MAC80211(priv, "leave\n");
2290 }
2291 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2292
2293 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2294 {
2295         if (!priv->txq)
2296                 priv->txq = kzalloc(
2297                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2298                         GFP_KERNEL);
2299         if (!priv->txq) {
2300                 IWL_ERR(priv, "Not enough memory for txq\n");
2301                 return -ENOMEM;
2302         }
2303         return 0;
2304 }
2305 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2306
2307 void iwl_free_txq_mem(struct iwl_priv *priv)
2308 {
2309         kfree(priv->txq);
2310         priv->txq = NULL;
2311 }
2312 EXPORT_SYMBOL(iwl_free_txq_mem);
2313
2314 #ifdef CONFIG_IWLWIFI_DEBUGFS
2315
2316 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2317
2318 void iwl_reset_traffic_log(struct iwl_priv *priv)
2319 {
2320         priv->tx_traffic_idx = 0;
2321         priv->rx_traffic_idx = 0;
2322         if (priv->tx_traffic)
2323                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2324         if (priv->rx_traffic)
2325                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2326 }
2327
2328 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2329 {
2330         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2331
2332         if (iwl_debug_level & IWL_DL_TX) {
2333                 if (!priv->tx_traffic) {
2334                         priv->tx_traffic =
2335                                 kzalloc(traffic_size, GFP_KERNEL);
2336                         if (!priv->tx_traffic)
2337                                 return -ENOMEM;
2338                 }
2339         }
2340         if (iwl_debug_level & IWL_DL_RX) {
2341                 if (!priv->rx_traffic) {
2342                         priv->rx_traffic =
2343                                 kzalloc(traffic_size, GFP_KERNEL);
2344                         if (!priv->rx_traffic)
2345                                 return -ENOMEM;
2346                 }
2347         }
2348         iwl_reset_traffic_log(priv);
2349         return 0;
2350 }
2351 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2352
2353 void iwl_free_traffic_mem(struct iwl_priv *priv)
2354 {
2355         kfree(priv->tx_traffic);
2356         priv->tx_traffic = NULL;
2357
2358         kfree(priv->rx_traffic);
2359         priv->rx_traffic = NULL;
2360 }
2361 EXPORT_SYMBOL(iwl_free_traffic_mem);
2362
2363 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2364                       u16 length, struct ieee80211_hdr *header)
2365 {
2366         __le16 fc;
2367         u16 len;
2368
2369         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2370                 return;
2371
2372         if (!priv->tx_traffic)
2373                 return;
2374
2375         fc = header->frame_control;
2376         if (ieee80211_is_data(fc)) {
2377                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2378                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2379                 memcpy((priv->tx_traffic +
2380                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2381                        header, len);
2382                 priv->tx_traffic_idx =
2383                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2384         }
2385 }
2386 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2387
2388 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2389                       u16 length, struct ieee80211_hdr *header)
2390 {
2391         __le16 fc;
2392         u16 len;
2393
2394         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2395                 return;
2396
2397         if (!priv->rx_traffic)
2398                 return;
2399
2400         fc = header->frame_control;
2401         if (ieee80211_is_data(fc)) {
2402                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2403                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2404                 memcpy((priv->rx_traffic +
2405                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2406                        header, len);
2407                 priv->rx_traffic_idx =
2408                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2409         }
2410 }
2411 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2412
2413 const char *get_mgmt_string(int cmd)
2414 {
2415         switch (cmd) {
2416                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2417                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2418                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2419                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2420                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2421                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2422                 IWL_CMD(MANAGEMENT_BEACON);
2423                 IWL_CMD(MANAGEMENT_ATIM);
2424                 IWL_CMD(MANAGEMENT_DISASSOC);
2425                 IWL_CMD(MANAGEMENT_AUTH);
2426                 IWL_CMD(MANAGEMENT_DEAUTH);
2427                 IWL_CMD(MANAGEMENT_ACTION);
2428         default:
2429                 return "UNKNOWN";
2430
2431         }
2432 }
2433
2434 const char *get_ctrl_string(int cmd)
2435 {
2436         switch (cmd) {
2437                 IWL_CMD(CONTROL_BACK_REQ);
2438                 IWL_CMD(CONTROL_BACK);
2439                 IWL_CMD(CONTROL_PSPOLL);
2440                 IWL_CMD(CONTROL_RTS);
2441                 IWL_CMD(CONTROL_CTS);
2442                 IWL_CMD(CONTROL_ACK);
2443                 IWL_CMD(CONTROL_CFEND);
2444                 IWL_CMD(CONTROL_CFENDACK);
2445         default:
2446                 return "UNKNOWN";
2447
2448         }
2449 }
2450
2451 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2452 {
2453         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2454         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2455         priv->led_tpt = 0;
2456 }
2457
2458 /*
2459  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2460  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2461  * Use debugFs to display the rx/rx_statistics
2462  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2463  * information will be recorded, but DATA pkt still will be recorded
2464  * for the reason of iwl_led.c need to control the led blinking based on
2465  * number of tx and rx data.
2466  *
2467  */
2468 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2469 {
2470         struct traffic_stats    *stats;
2471
2472         if (is_tx)
2473                 stats = &priv->tx_stats;
2474         else
2475                 stats = &priv->rx_stats;
2476
2477         if (ieee80211_is_mgmt(fc)) {
2478                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2479                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2480                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2481                         break;
2482                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2483                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2484                         break;
2485                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2486                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2487                         break;
2488                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2489                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2490                         break;
2491                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2492                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2493                         break;
2494                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2495                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2496                         break;
2497                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2498                         stats->mgmt[MANAGEMENT_BEACON]++;
2499                         break;
2500                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2501                         stats->mgmt[MANAGEMENT_ATIM]++;
2502                         break;
2503                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2504                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2505                         break;
2506                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2507                         stats->mgmt[MANAGEMENT_AUTH]++;
2508                         break;
2509                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2510                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2511                         break;
2512                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2513                         stats->mgmt[MANAGEMENT_ACTION]++;
2514                         break;
2515                 }
2516         } else if (ieee80211_is_ctl(fc)) {
2517                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2518                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2519                         stats->ctrl[CONTROL_BACK_REQ]++;
2520                         break;
2521                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2522                         stats->ctrl[CONTROL_BACK]++;
2523                         break;
2524                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2525                         stats->ctrl[CONTROL_PSPOLL]++;
2526                         break;
2527                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2528                         stats->ctrl[CONTROL_RTS]++;
2529                         break;
2530                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2531                         stats->ctrl[CONTROL_CTS]++;
2532                         break;
2533                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2534                         stats->ctrl[CONTROL_ACK]++;
2535                         break;
2536                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2537                         stats->ctrl[CONTROL_CFEND]++;
2538                         break;
2539                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2540                         stats->ctrl[CONTROL_CFENDACK]++;
2541                         break;
2542                 }
2543         } else {
2544                 /* data */
2545                 stats->data_cnt++;
2546                 stats->data_bytes += len;
2547         }
2548         iwl_leds_background(priv);
2549 }
2550 EXPORT_SYMBOL(iwl_update_stats);
2551 #endif
2552
2553 const static char *get_csr_string(int cmd)
2554 {
2555         switch (cmd) {
2556                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2557                 IWL_CMD(CSR_INT_COALESCING);
2558                 IWL_CMD(CSR_INT);
2559                 IWL_CMD(CSR_INT_MASK);
2560                 IWL_CMD(CSR_FH_INT_STATUS);
2561                 IWL_CMD(CSR_GPIO_IN);
2562                 IWL_CMD(CSR_RESET);
2563                 IWL_CMD(CSR_GP_CNTRL);
2564                 IWL_CMD(CSR_HW_REV);
2565                 IWL_CMD(CSR_EEPROM_REG);
2566                 IWL_CMD(CSR_EEPROM_GP);
2567                 IWL_CMD(CSR_OTP_GP_REG);
2568                 IWL_CMD(CSR_GIO_REG);
2569                 IWL_CMD(CSR_GP_UCODE_REG);
2570                 IWL_CMD(CSR_GP_DRIVER_REG);
2571                 IWL_CMD(CSR_UCODE_DRV_GP1);
2572                 IWL_CMD(CSR_UCODE_DRV_GP2);
2573                 IWL_CMD(CSR_LED_REG);
2574                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2575                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2576                 IWL_CMD(CSR_ANA_PLL_CFG);
2577                 IWL_CMD(CSR_HW_REV_WA_REG);
2578                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2579         default:
2580                 return "UNKNOWN";
2581
2582         }
2583 }
2584
2585 void iwl_dump_csr(struct iwl_priv *priv)
2586 {
2587         int i;
2588         u32 csr_tbl[] = {
2589                 CSR_HW_IF_CONFIG_REG,
2590                 CSR_INT_COALESCING,
2591                 CSR_INT,
2592                 CSR_INT_MASK,
2593                 CSR_FH_INT_STATUS,
2594                 CSR_GPIO_IN,
2595                 CSR_RESET,
2596                 CSR_GP_CNTRL,
2597                 CSR_HW_REV,
2598                 CSR_EEPROM_REG,
2599                 CSR_EEPROM_GP,
2600                 CSR_OTP_GP_REG,
2601                 CSR_GIO_REG,
2602                 CSR_GP_UCODE_REG,
2603                 CSR_GP_DRIVER_REG,
2604                 CSR_UCODE_DRV_GP1,
2605                 CSR_UCODE_DRV_GP2,
2606                 CSR_LED_REG,
2607                 CSR_DRAM_INT_TBL_REG,
2608                 CSR_GIO_CHICKEN_BITS,
2609                 CSR_ANA_PLL_CFG,
2610                 CSR_HW_REV_WA_REG,
2611                 CSR_DBG_HPET_MEM_REG
2612         };
2613         IWL_ERR(priv, "CSR values:\n");
2614         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2615                 "CSR_INT_PERIODIC_REG)\n");
2616         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2617                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2618                         get_csr_string(csr_tbl[i]),
2619                         iwl_read32(priv, csr_tbl[i]));
2620         }
2621 }
2622 EXPORT_SYMBOL(iwl_dump_csr);
2623
2624 const static char *get_fh_string(int cmd)
2625 {
2626         switch (cmd) {
2627                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2628                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2629                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2630                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2631                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2632                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2633                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2634                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2635                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2636         default:
2637                 return "UNKNOWN";
2638
2639         }
2640 }
2641
2642 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2643 {
2644         int i;
2645 #ifdef CONFIG_IWLWIFI_DEBUG
2646         int pos = 0;
2647         size_t bufsz = 0;
2648 #endif
2649         u32 fh_tbl[] = {
2650                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2651                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2652                 FH_RSCSR_CHNL0_WPTR,
2653                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2654                 FH_MEM_RSSR_SHARED_CTRL_REG,
2655                 FH_MEM_RSSR_RX_STATUS_REG,
2656                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2657                 FH_TSSR_TX_STATUS_REG,
2658                 FH_TSSR_TX_ERROR_REG
2659         };
2660 #ifdef CONFIG_IWLWIFI_DEBUG
2661         if (display) {
2662                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2663                 *buf = kmalloc(bufsz, GFP_KERNEL);
2664                 if (!*buf)
2665                         return -ENOMEM;
2666                 pos += scnprintf(*buf + pos, bufsz - pos,
2667                                 "FH register values:\n");
2668                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2669                         pos += scnprintf(*buf + pos, bufsz - pos,
2670                                 "  %34s: 0X%08x\n",
2671                                 get_fh_string(fh_tbl[i]),
2672                                 iwl_read_direct32(priv, fh_tbl[i]));
2673                 }
2674                 return pos;
2675         }
2676 #endif
2677         IWL_ERR(priv, "FH register values:\n");
2678         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2679                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2680                         get_fh_string(fh_tbl[i]),
2681                         iwl_read_direct32(priv, fh_tbl[i]));
2682         }
2683         return 0;
2684 }
2685 EXPORT_SYMBOL(iwl_dump_fh);
2686
2687 static void iwl_force_rf_reset(struct iwl_priv *priv)
2688 {
2689         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2690                 return;
2691
2692         if (!iwl_is_associated(priv)) {
2693                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2694                 return;
2695         }
2696         /*
2697          * There is no easy and better way to force reset the radio,
2698          * the only known method is switching channel which will force to
2699          * reset and tune the radio.
2700          * Use internal short scan (single channel) operation to should
2701          * achieve this objective.
2702          * Driver should reset the radio when number of consecutive missed
2703          * beacon, or any other uCode error condition detected.
2704          */
2705         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2706         iwl_internal_short_hw_scan(priv);
2707 }
2708
2709
2710 int iwl_force_reset(struct iwl_priv *priv, int mode)
2711 {
2712         struct iwl_force_reset *force_reset;
2713
2714         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2715                 return -EINVAL;
2716
2717         if (mode >= IWL_MAX_FORCE_RESET) {
2718                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2719                 return -EINVAL;
2720         }
2721         force_reset = &priv->force_reset[mode];
2722         force_reset->reset_request_count++;
2723         if (force_reset->last_force_reset_jiffies &&
2724             time_after(force_reset->last_force_reset_jiffies +
2725             force_reset->reset_duration, jiffies)) {
2726                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2727                 force_reset->reset_reject_count++;
2728                 return -EAGAIN;
2729         }
2730         force_reset->reset_success_count++;
2731         force_reset->last_force_reset_jiffies = jiffies;
2732         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2733         switch (mode) {
2734         case IWL_RF_RESET:
2735                 iwl_force_rf_reset(priv);
2736                 break;
2737         case IWL_FW_RESET:
2738                 IWL_ERR(priv, "On demand firmware reload\n");
2739                 /* Set the FW error flag -- cleared on iwl_down */
2740                 set_bit(STATUS_FW_ERROR, &priv->status);
2741                 wake_up_interruptible(&priv->wait_command_queue);
2742                 /*
2743                  * Keep the restart process from trying to send host
2744                  * commands by clearing the INIT status bit
2745                  */
2746                 clear_bit(STATUS_READY, &priv->status);
2747                 queue_work(priv->workqueue, &priv->restart);
2748                 break;
2749         }
2750         return 0;
2751 }
2752 EXPORT_SYMBOL(iwl_force_reset);
2753
2754 /**
2755  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2756  *
2757  * During normal condition (no queue is stuck), the timer is continually set to
2758  * execute every monitor_recover_period milliseconds after the last timer
2759  * expired.  When the queue read_ptr is at the same place, the timer is
2760  * shorten to 100mSecs.  This is
2761  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2762  *      2) to detect the stuck queues quicker before the station and AP can
2763  *      disassociate each other.
2764  *
2765  * This function monitors all the tx queues and recover from it if any
2766  * of the queues are stuck.
2767  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2768  *      it will recover by resetting the firmware and return.
2769  * 2. Then, it checks for station association.  If it associates it will check
2770  *      other queues.  If any queue is stuck, it will recover by resetting
2771  *      the firmware.
2772  * Note: It the number of times the queue read_ptr to be at the same place to
2773  *      be MAX_REPEAT+1 in order to consider to be stuck.
2774  */
2775 /*
2776  * The maximum number of times the read pointer of the tx queue at the
2777  * same place without considering to be stuck.
2778  */
2779 #define MAX_REPEAT      (2)
2780 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2781 {
2782         struct iwl_tx_queue *txq;
2783         struct iwl_queue *q;
2784
2785         txq = &priv->txq[cnt];
2786         q = &txq->q;
2787         /* queue is empty, skip */
2788         if (q->read_ptr != q->write_ptr) {
2789                 if (q->read_ptr == q->last_read_ptr) {
2790                         /* a queue has not been read from last time */
2791                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2792                                 IWL_ERR(priv,
2793                                         "queue %d stuck %d time. Fw reload.\n",
2794                                         q->id, q->repeat_same_read_ptr);
2795                                 q->repeat_same_read_ptr = 0;
2796                                 iwl_force_reset(priv, IWL_FW_RESET);
2797                         } else {
2798                                 q->repeat_same_read_ptr++;
2799                                 IWL_DEBUG_RADIO(priv,
2800                                                 "queue %d, not read %d time\n",
2801                                                 q->id,
2802                                                 q->repeat_same_read_ptr);
2803                                 mod_timer(&priv->monitor_recover, jiffies +
2804                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2805                         }
2806                         return 1;
2807                 } else {
2808                         q->last_read_ptr = q->read_ptr;
2809                         q->repeat_same_read_ptr = 0;
2810                 }
2811         }
2812         return 0;
2813 }
2814
2815 void iwl_bg_monitor_recover(unsigned long data)
2816 {
2817         struct iwl_priv *priv = (struct iwl_priv *)data;
2818         int cnt;
2819
2820         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2821                 return;
2822
2823         /* monitor and check for stuck cmd queue */
2824         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2825                 return;
2826
2827         /* monitor and check for other stuck queues */
2828         if (iwl_is_associated(priv)) {
2829                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2830                         /* skip as we already checked the command queue */
2831                         if (cnt == IWL_CMD_QUEUE_NUM)
2832                                 continue;
2833                         if (iwl_check_stuck_queue(priv, cnt))
2834                                 return;
2835                 }
2836         }
2837         /*
2838          * Reschedule the timer to occur in
2839          * priv->cfg->monitor_recover_period
2840          */
2841         mod_timer(&priv->monitor_recover,
2842                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2843 }
2844 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2845
2846 #ifdef CONFIG_PM
2847
2848 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2849 {
2850         struct iwl_priv *priv = pci_get_drvdata(pdev);
2851
2852         /*
2853          * This function is called when system goes into suspend state
2854          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2855          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2856          * it will not call apm_ops.stop() to stop the DMA operation.
2857          * Calling apm_ops.stop here to make sure we stop the DMA.
2858          */
2859         priv->cfg->ops->lib->apm_ops.stop(priv);
2860
2861         pci_save_state(pdev);
2862         pci_disable_device(pdev);
2863         pci_set_power_state(pdev, PCI_D3hot);
2864
2865         return 0;
2866 }
2867 EXPORT_SYMBOL(iwl_pci_suspend);
2868
2869 int iwl_pci_resume(struct pci_dev *pdev)
2870 {
2871         struct iwl_priv *priv = pci_get_drvdata(pdev);
2872         int ret;
2873
2874         /*
2875          * We disable the RETRY_TIMEOUT register (0x41) to keep
2876          * PCI Tx retries from interfering with C3 CPU state.
2877          */
2878         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2879
2880         pci_set_power_state(pdev, PCI_D0);
2881         ret = pci_enable_device(pdev);
2882         if (ret)
2883                 return ret;
2884         pci_restore_state(pdev);
2885         iwl_enable_interrupts(priv);
2886
2887         return 0;
2888 }
2889 EXPORT_SYMBOL(iwl_pci_resume);
2890
2891 #endif /* CONFIG_PM */