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)
 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         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 498                 beacon_int = priv->beacon_int;
 499                 priv->rxon_timing.atim_window = 0;
 500         } else {
 501                 beacon_int = priv->vif->bss_conf.beacon_int;
 502
 503                 /* TODO: we need to get atim_window from upper stack
 504                  * for now we set to 0 */
 505                 priv->rxon_timing.atim_window = 0;
 506         }
 507
 508         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 509                                 priv->hw_params.max_beacon_itrvl * 1024);
 510         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 511
 512         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 513         interval_tm = beacon_int * 1024;
 514         rem = do_div(tsf, interval_tm);
 515         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518         IWL_DEBUG_ASSOC(priv,
 519                         "beacon interval %d beacon timer %d beacon tim %d\n",
 520                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 521                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 522                         le16_to_cpu(priv->rxon_timing.atim_window));
 523 }
 524 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 525
 526 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 527 {
 528         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 529
 530         if (hw_decrypt)
 531                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 532         else
 533                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 534
 535 }
 536 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 537
 538 /**
 539  * iwl_check_rxon_cmd - validate RXON structure is valid
 540  *
 541  * NOTE:  This is really only useful during development and can eventually
 542  * be #ifdef'd out once the driver is stable and folks aren't actively
 543  * making changes
 544  */
 545 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 546 {
 547         int error = 0;
 548         int counter = 1;
 549         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 550
 551         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 552                 error |= le32_to_cpu(rxon->flags &
 553                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 554                                  RXON_FLG_RADAR_DETECT_MSK));
 555                 if (error)
 556                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 557                                     counter++, error);
 558         } else {
 559                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 560                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 561                 if (error)
 562                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 563                                     counter++, error);
 564                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 565                 if (error)
 566                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 567                                     counter++, error);
 568         }
 569         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 570         if (error)
 571                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 572
 573         /* make sure basic rates 6Mbps and 1Mbps are supported */
 574         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 575                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 576         if (error)
 577                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 578
 579         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 580         if (error)
 581                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 582
 583         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 584                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 585         if (error)
 586                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 587                             counter++, error);
 588
 589         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 590                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 591         if (error)
 592                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 593                             counter++, error);
 594
 595         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 596                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 597         if (error)
 598                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 599                             counter++, error);
 600
 601         if (error)
 602                 IWL_WARN(priv, "Tuning to channel %d\n",
 603                             le16_to_cpu(rxon->channel));
 604
 605         if (error) {
 606                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 607                 return -1;
 608         }
 609         return 0;
 610 }
 611 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 612
 613 /**
 614  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 615  * @priv: staging_rxon is compared to active_rxon
 616  *
 617  * If the RXON structure is changing enough to require a new tune,
 618  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 619  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 620  */
 621 int iwl_full_rxon_required(struct iwl_priv *priv)
 622 {
 623
 624         /* These items are only settable from the full RXON command */
 625         if (!(iwl_is_associated(priv)) ||
 626             compare_ether_addr(priv->staging_rxon.bssid_addr,
 627                                priv->active_rxon.bssid_addr) ||
 628             compare_ether_addr(priv->staging_rxon.node_addr,
 629                                priv->active_rxon.node_addr) ||
 630             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 631                                priv->active_rxon.wlap_bssid_addr) ||
 632             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 633             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 634             (priv->staging_rxon.air_propagation !=
 635              priv->active_rxon.air_propagation) ||
 636             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 637              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 638             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 639              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 640             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 641              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 642             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 643                 return 1;
 644
 645         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 646          * be updated with the RXON_ASSOC command -- however only some
 647          * flag transitions are allowed using RXON_ASSOC */
 648
 649         /* Check if we are not switching bands */
 650         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 651             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 652                 return 1;
 653
 654         /* Check if we are switching association toggle */
 655         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 656                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 657                 return 1;
 658
 659         return 0;
 660 }
 661 EXPORT_SYMBOL(iwl_full_rxon_required);
 662
 663 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 664 {
 665         /*
 666          * Assign the lowest rate -- should really get this from
 667          * the beacon skb from mac80211.
 668          */
 669         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 670                 return IWL_RATE_1M_PLCP;
 671         else
 672                 return IWL_RATE_6M_PLCP;
 673 }
 674 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 675
 676 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 677 {
 678         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 679
 680         if (!ht_conf->is_ht) {
 681                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 682                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 683                         RXON_FLG_HT40_PROT_MSK |
 684                         RXON_FLG_HT_PROT_MSK);
 685                 return;
 686         }
 687
 688         /* FIXME: if the definition of ht_protection changed, the "translation"
 689          * will be needed for rxon->flags
 690          */
 691         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 692
 693         /* Set up channel bandwidth:
 694          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 695         /* clear the HT channel mode before set the mode */
 696         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 697                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 698         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 699                 /* pure ht40 */
 700                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 701                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 702                         /* Note: control channel is opposite of extension channel */
 703                         switch (ht_conf->extension_chan_offset) {
 704                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 705                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 706                                 break;
 707                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 708                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 709                                 break;
 710                         }
 711                 } else {
 712                         /* Note: control channel is opposite of extension channel */
 713                         switch (ht_conf->extension_chan_offset) {
 714                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 715                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 716                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 717                                 break;
 718                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 719                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 720                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 721                                 break;
 722                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 723                         default:
 724                                 /* channel location only valid if in Mixed mode */
 725                                 IWL_ERR(priv, "invalid extension channel offset\n");
 726                                 break;
 727                         }
 728                 }
 729         } else {
 730                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 731         }
 732
 733         if (priv->cfg->ops->hcmd->set_rxon_chain)
 734                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 735
 736         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 737                         "extension channel offset 0x%x\n",
 738                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 739                         ht_conf->extension_chan_offset);
 740         return;
 741 }
 742 EXPORT_SYMBOL(iwl_set_rxon_ht);
 743
 744 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 745 #define IWL_NUM_RX_CHAINS_SINGLE        2
 746 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 747 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 748
 749 /*
 750  * Determine how many receiver/antenna chains to use.
 751  *
 752  * More provides better reception via diversity.  Fewer saves power
 753  * at the expense of throughput, but only when not in powersave to
 754  * start with.
 755  *
 756  * MIMO (dual stream) requires at least 2, but works better with 3.
 757  * This does not determine *which* chains to use, just how many.
 758  */
 759 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 760 {
 761         /* # of Rx chains to use when expecting MIMO. */
 762         if (is_single_rx_stream(priv))
 763                 return IWL_NUM_RX_CHAINS_SINGLE;
 764         else
 765                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 766 }
 767
 768 /*
 769  * When we are in power saving mode, unless device support spatial
 770  * multiplexing power save, use the active count for rx chain count.
 771  */
 772 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 773 {
 774         /* # Rx chains when idling, depending on SMPS mode */
 775         switch (priv->current_ht_config.smps) {
 776         case IEEE80211_SMPS_STATIC:
 777         case IEEE80211_SMPS_DYNAMIC:
 778                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 779         case IEEE80211_SMPS_OFF:
 780                 return active_cnt;
 781         default:
 782                 WARN(1, "invalid SMPS mode %d",
 783                      priv->current_ht_config.smps);
 784                 return active_cnt;
 785         }
 786 }
 787
 788 /* up to 4 chains */
 789 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 790 {
 791         u8 res;
 792         res = (chain_bitmap & BIT(0)) >> 0;
 793         res += (chain_bitmap & BIT(1)) >> 1;
 794         res += (chain_bitmap & BIT(2)) >> 2;
 795         res += (chain_bitmap & BIT(3)) >> 3;
 796         return res;
 797 }
 798
 799 /**
 800  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 801  *
 802  * Selects how many and which Rx receivers/antennas/chains to use.
 803  * This should not be used for scan command ... it puts data in wrong place.
 804  */
 805 void iwl_set_rxon_chain(struct iwl_priv *priv)
 806 {
 807         bool is_single = is_single_rx_stream(priv);
 808         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 809         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 810         u32 active_chains;
 811         u16 rx_chain;
 812
 813         /* Tell uCode which antennas are actually connected.
 814          * Before first association, we assume all antennas are connected.
 815          * Just after first association, iwl_chain_noise_calibration()
 816          *    checks which antennas actually *are* connected. */
 817          if (priv->chain_noise_data.active_chains)
 818                 active_chains = priv->chain_noise_data.active_chains;
 819         else
 820                 active_chains = priv->hw_params.valid_rx_ant;
 821
 822         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 823
 824         /* How many receivers should we use? */
 825         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 826         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 827
 828
 829         /* correct rx chain count according hw settings
 830          * and chain noise calibration
 831          */
 832         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 833         if (valid_rx_cnt < active_rx_cnt)
 834                 active_rx_cnt = valid_rx_cnt;
 835
 836         if (valid_rx_cnt < idle_rx_cnt)
 837                 idle_rx_cnt = valid_rx_cnt;
 838
 839         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 840         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 841
 842         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 843
 844         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 845                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 846         else
 847                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 848
 849         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 850                         priv->staging_rxon.rx_chain,
 851                         active_rx_cnt, idle_rx_cnt);
 852
 853         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 854                 active_rx_cnt < idle_rx_cnt);
 855 }
 856 EXPORT_SYMBOL(iwl_set_rxon_chain);
 857
 858 /**
 859  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 860  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 861  * @channel: Any channel valid for the requested phymode
 862
 863  * In addition to setting the staging RXON, priv->phymode is also set.
 864  *
 865  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 866  * in the staging RXON flag structure based on the phymode
 867  */
 868 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 869 {
 870         enum ieee80211_band band = ch->band;
 871         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 872
 873         if (!iwl_get_channel_info(priv, band, channel)) {
 874                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 875                                channel, band);
 876                 return -EINVAL;
 877         }
 878
 879         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 880             (priv->band == band))
 881                 return 0;
 882
 883         priv->staging_rxon.channel = cpu_to_le16(channel);
 884         if (band == IEEE80211_BAND_5GHZ)
 885                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 886         else
 887                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 888
 889         priv->band = band;
 890
 891         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 892
 893         return 0;
 894 }
 895 EXPORT_SYMBOL(iwl_set_rxon_channel);
 896
 897 void iwl_set_flags_for_band(struct iwl_priv *priv,
 898                             enum ieee80211_band band)
 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 (priv->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 (priv->iw_mode == 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, int mode)
 925 {
 926         const struct iwl_channel_info *ch_info;
 927
 928         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 929
 930         switch (mode) {
 931         case NL80211_IFTYPE_AP:
 932                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 933                 break;
 934
 935         case NL80211_IFTYPE_STATION:
 936                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 937                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 938                 break;
 939
 940         case NL80211_IFTYPE_ADHOC:
 941                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 942                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 943                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 944                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 945                 break;
 946
 947         default:
 948                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
 949                 break;
 950         }
 951
 952 #if 0
 953         /* TODO:  Figure out when short_preamble would be set and cache from
 954          * that */
 955         if (!hw_to_local(priv->hw)->short_preamble)
 956                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 957         else
 958                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 959 #endif
 960
 961         ch_info = iwl_get_channel_info(priv, priv->band,
 962                                        le16_to_cpu(priv->active_rxon.channel));
 963
 964         if (!ch_info)
 965                 ch_info = &priv->channel_info[0];
 966
 967         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 968         priv->band = ch_info->band;
 969
 970         iwl_set_flags_for_band(priv, priv->band);
 971
 972         priv->staging_rxon.ofdm_basic_rates =
 973             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 974         priv->staging_rxon.cck_basic_rates =
 975             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 976
 977         /* clear both MIX and PURE40 mode flag */
 978         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 979                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 980         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 981         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
 982         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 983         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 984         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
 985 }
 986 EXPORT_SYMBOL(iwl_connection_init_rx_config);
 987
 988 static void iwl_set_rate(struct iwl_priv *priv)
 989 {
 990         const struct ieee80211_supported_band *hw = NULL;
 991         struct ieee80211_rate *rate;
 992         int i;
 993
 994         hw = iwl_get_hw_mode(priv, priv->band);
 995         if (!hw) {
 996                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 997                 return;
 998         }
 999
1000         priv->active_rate = 0;
1001
1002         for (i = 0; i < hw->n_bitrates; i++) {
1003                 rate = &(hw->bitrates[i]);
1004                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1005                         priv->active_rate |= (1 << rate->hw_value);
1006         }
1007
1008         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1009
1010         priv->staging_rxon.cck_basic_rates =
1011             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1012
1013         priv->staging_rxon.ofdm_basic_rates =
1014            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1015 }
1016
1017 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1018 {
1019         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1020         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1021         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1022
1023         if (priv->switch_rxon.switch_in_progress) {
1024                 if (!le32_to_cpu(csa->status) &&
1025                     (csa->channel == priv->switch_rxon.channel)) {
1026                         rxon->channel = csa->channel;
1027                         priv->staging_rxon.channel = csa->channel;
1028                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1029                               le16_to_cpu(csa->channel));
1030                 } else
1031                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1032                               le16_to_cpu(csa->channel));
1033
1034                 priv->switch_rxon.switch_in_progress = false;
1035         }
1036 }
1037 EXPORT_SYMBOL(iwl_rx_csa);
1038
1039 #ifdef CONFIG_IWLWIFI_DEBUG
1040 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1041 {
1042         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1043
1044         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1045         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1046         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1047         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1048         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1049                         le32_to_cpu(rxon->filter_flags));
1050         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1051         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1052                         rxon->ofdm_basic_rates);
1053         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1054         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1055         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1056         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1057 }
1058 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1059 #endif
1060 /**
1061  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1062  */
1063 void iwl_irq_handle_error(struct iwl_priv *priv)
1064 {
1065         /* Set the FW error flag -- cleared on iwl_down */
1066         set_bit(STATUS_FW_ERROR, &priv->status);
1067
1068         /* Cancel currently queued command. */
1069         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1070
1071         IWL_ERR(priv, "Loaded firmware version: %s\n",
1072                 priv->hw->wiphy->fw_version);
1073
1074         priv->cfg->ops->lib->dump_nic_error_log(priv);
1075         if (priv->cfg->ops->lib->dump_csr)
1076                 priv->cfg->ops->lib->dump_csr(priv);
1077         if (priv->cfg->ops->lib->dump_fh)
1078                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1079         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1080 #ifdef CONFIG_IWLWIFI_DEBUG
1081         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1082                 iwl_print_rx_config_cmd(priv);
1083 #endif
1084
1085         wake_up_interruptible(&priv->wait_command_queue);
1086
1087         /* Keep the restart process from trying to send host
1088          * commands by clearing the INIT status bit */
1089         clear_bit(STATUS_READY, &priv->status);
1090
1091         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1092                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1093                           "Restarting adapter due to uCode error.\n");
1094
1095                 if (priv->cfg->mod_params->restart_fw)
1096                         queue_work(priv->workqueue, &priv->restart);
1097         }
1098 }
1099 EXPORT_SYMBOL(iwl_irq_handle_error);
1100
1101 static int iwl_apm_stop_master(struct iwl_priv *priv)
1102 {
1103         int ret = 0;
1104
1105         /* stop device's busmaster DMA activity */
1106         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1107
1108         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1109                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1110         if (ret)
1111                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1112
1113         IWL_DEBUG_INFO(priv, "stop master\n");
1114
1115         return ret;
1116 }
1117
1118 void iwl_apm_stop(struct iwl_priv *priv)
1119 {
1120         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1121
1122         /* Stop device's DMA activity */
1123         iwl_apm_stop_master(priv);
1124
1125         /* Reset the entire device */
1126         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1127
1128         udelay(10);
1129
1130         /*
1131          * Clear "initialization complete" bit to move adapter from
1132          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1133          */
1134         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1135 }
1136 EXPORT_SYMBOL(iwl_apm_stop);
1137
1138
1139 /*
1140  * Start up NIC's basic functionality after it has been reset
1141  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1142  * NOTE:  This does not load uCode nor start the embedded processor
1143  */
1144 int iwl_apm_init(struct iwl_priv *priv)
1145 {
1146         int ret = 0;
1147         u16 lctl;
1148
1149         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1150
1151         /*
1152          * Use "set_bit" below rather than "write", to preserve any hardware
1153          * bits already set by default after reset.
1154          */
1155
1156         /* Disable L0S exit timer (platform NMI Work/Around) */
1157         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1158                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1159
1160         /*
1161          * Disable L0s without affecting L1;
1162          *  don't wait for ICH L0s (ICH bug W/A)
1163          */
1164         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1165                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1166
1167         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1168         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1169
1170         /*
1171          * Enable HAP INTA (interrupt from management bus) to
1172          * wake device's PCI Express link L1a -> L0s
1173          * NOTE:  This is no-op for 3945 (non-existant bit)
1174          */
1175         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1176                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1177
1178         /*
1179          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1180          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1181          * If so (likely), disable L0S, so device moves directly L0->L1;
1182          *    costs negligible amount of power savings.
1183          * If not (unlikely), enable L0S, so there is at least some
1184          *    power savings, even without L1.
1185          */
1186         if (priv->cfg->set_l0s) {
1187                 lctl = iwl_pcie_link_ctl(priv);
1188                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1189                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1190                         /* L1-ASPM enabled; disable(!) L0S  */
1191                         iwl_set_bit(priv, CSR_GIO_REG,
1192                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1193                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1194                 } else {
1195                         /* L1-ASPM disabled; enable(!) L0S */
1196                         iwl_clear_bit(priv, CSR_GIO_REG,
1197                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1198                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1199                 }
1200         }
1201
1202         /* Configure analog phase-lock-loop before activating to D0A */
1203         if (priv->cfg->pll_cfg_val)
1204                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1205
1206         /*
1207          * Set "initialization complete" bit to move adapter from
1208          * D0U* --> D0A* (powered-up active) state.
1209          */
1210         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1211
1212         /*
1213          * Wait for clock stabilization; once stabilized, access to
1214          * device-internal resources is supported, e.g. iwl_write_prph()
1215          * and accesses to uCode SRAM.
1216          */
1217         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1218                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1219                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1220         if (ret < 0) {
1221                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1222                 goto out;
1223         }
1224
1225         /*
1226          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1227          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1228          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1229          * and don't need BSM to restore data after power-saving sleep.
1230          *
1231          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1232          * do not disable clocks.  This preserves any hardware bits already
1233          * set by default in "CLK_CTRL_REG" after reset.
1234          */
1235         if (priv->cfg->use_bsm)
1236                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1237                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1238         else
1239                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1240                         APMG_CLK_VAL_DMA_CLK_RQT);
1241         udelay(20);
1242
1243         /* Disable L1-Active */
1244         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1245                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1246
1247 out:
1248         return ret;
1249 }
1250 EXPORT_SYMBOL(iwl_apm_init);
1251
1252
1253
1254 void iwl_configure_filter(struct ieee80211_hw *hw,
1255                           unsigned int changed_flags,
1256                           unsigned int *total_flags,
1257                           u64 multicast)
1258 {
1259         struct iwl_priv *priv = hw->priv;
1260         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1261
1262         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1263                         changed_flags, *total_flags);
1264
1265         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1266                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1267                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1268                 else
1269                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1270         }
1271         if (changed_flags & FIF_ALLMULTI) {
1272                 if (*total_flags & FIF_ALLMULTI)
1273                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1274                 else
1275                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1276         }
1277         if (changed_flags & FIF_CONTROL) {
1278                 if (*total_flags & FIF_CONTROL)
1279                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1280                 else
1281                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1282         }
1283         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1284                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1285                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1286                 else
1287                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1288         }
1289
1290         /* We avoid iwl_commit_rxon here to commit the new filter flags
1291          * since mac80211 will call ieee80211_hw_config immediately.
1292          * (mc_list is not supported at this time). Otherwise, we need to
1293          * queue a background iwl_commit_rxon work.
1294          */
1295
1296         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1297                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1298 }
1299 EXPORT_SYMBOL(iwl_configure_filter);
1300
1301 int iwl_set_hw_params(struct iwl_priv *priv)
1302 {
1303         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1304         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1305         if (priv->cfg->mod_params->amsdu_size_8K)
1306                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1307         else
1308                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1309
1310         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1311
1312         if (priv->cfg->mod_params->disable_11n)
1313                 priv->cfg->sku &= ~IWL_SKU_N;
1314
1315         /* Device-specific setup */
1316         return priv->cfg->ops->lib->set_hw_params(priv);
1317 }
1318 EXPORT_SYMBOL(iwl_set_hw_params);
1319
1320 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1321 {
1322         int ret = 0;
1323         s8 prev_tx_power = priv->tx_power_user_lmt;
1324
1325         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1326                 IWL_WARN(priv,
1327                          "Requested user TXPOWER %d below lower limit %d.\n",
1328                          tx_power,
1329                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1330                 return -EINVAL;
1331         }
1332
1333         if (tx_power > priv->tx_power_device_lmt) {
1334                 IWL_WARN(priv,
1335                         "Requested user TXPOWER %d above upper limit %d.\n",
1336                          tx_power, priv->tx_power_device_lmt);
1337                 return -EINVAL;
1338         }
1339
1340         if (priv->tx_power_user_lmt != tx_power)
1341                 force = true;
1342
1343         /* if nic is not up don't send command */
1344         if (iwl_is_ready_rf(priv)) {
1345                 priv->tx_power_user_lmt = tx_power;
1346                 if (force && priv->cfg->ops->lib->send_tx_power)
1347                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1348                 else if (!priv->cfg->ops->lib->send_tx_power)
1349                         ret = -EOPNOTSUPP;
1350                 /*
1351                  * if fail to set tx_power, restore the orig. tx power
1352                  */
1353                 if (ret)
1354                         priv->tx_power_user_lmt = prev_tx_power;
1355         }
1356
1357         /*
1358          * Even this is an async host command, the command
1359          * will always report success from uCode
1360          * So once driver can placing the command into the queue
1361          * successfully, driver can use priv->tx_power_user_lmt
1362          * to reflect the current tx power
1363          */
1364         return ret;
1365 }
1366 EXPORT_SYMBOL(iwl_set_tx_power);
1367
1368 irqreturn_t iwl_isr_legacy(int irq, void *data)
1369 {
1370         struct iwl_priv *priv = data;
1371         u32 inta, inta_mask;
1372         u32 inta_fh;
1373         unsigned long flags;
1374         if (!priv)
1375                 return IRQ_NONE;
1376
1377         spin_lock_irqsave(&priv->lock, flags);
1378
1379         /* Disable (but don't clear!) interrupts here to avoid
1380          *    back-to-back ISRs and sporadic interrupts from our NIC.
1381          * If we have something to service, the tasklet will re-enable ints.
1382          * If we *don't* have something, we'll re-enable before leaving here. */
1383         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1384         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1385
1386         /* Discover which interrupts are active/pending */
1387         inta = iwl_read32(priv, CSR_INT);
1388         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1389
1390         /* Ignore interrupt if there's nothing in NIC to service.
1391          * This may be due to IRQ shared with another device,
1392          * or due to sporadic interrupts thrown from our NIC. */
1393         if (!inta && !inta_fh) {
1394                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1395                 goto none;
1396         }
1397
1398         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1399                 /* Hardware disappeared. It might have already raised
1400                  * an interrupt */
1401                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1402                 goto unplugged;
1403         }
1404
1405         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1406                       inta, inta_mask, inta_fh);
1407
1408         inta &= ~CSR_INT_BIT_SCD;
1409
1410         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1411         if (likely(inta || inta_fh))
1412                 tasklet_schedule(&priv->irq_tasklet);
1413
1414  unplugged:
1415         spin_unlock_irqrestore(&priv->lock, flags);
1416         return IRQ_HANDLED;
1417
1418  none:
1419         /* re-enable interrupts here since we don't have anything to service. */
1420         /* only Re-enable if diabled by irq */
1421         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1422                 iwl_enable_interrupts(priv);
1423         spin_unlock_irqrestore(&priv->lock, flags);
1424         return IRQ_NONE;
1425 }
1426 EXPORT_SYMBOL(iwl_isr_legacy);
1427
1428 void iwl_send_bt_config(struct iwl_priv *priv)
1429 {
1430         struct iwl_bt_cmd bt_cmd = {
1431                 .lead_time = BT_LEAD_TIME_DEF,
1432                 .max_kill = BT_MAX_KILL_DEF,
1433                 .kill_ack_mask = 0,
1434                 .kill_cts_mask = 0,
1435         };
1436
1437         if (!bt_coex_active)
1438                 bt_cmd.flags = BT_COEX_DISABLE;
1439         else
1440                 bt_cmd.flags = BT_COEX_ENABLE;
1441
1442         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1443                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1444
1445         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1446                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1447                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1448 }
1449 EXPORT_SYMBOL(iwl_send_bt_config);
1450
1451 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1452 {
1453         struct iwl_statistics_cmd statistics_cmd = {
1454                 .configuration_flags =
1455                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1456         };
1457
1458         if (flags & CMD_ASYNC)
1459                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1460                                                sizeof(struct iwl_statistics_cmd),
1461                                                &statistics_cmd, NULL);
1462         else
1463                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1464                                         sizeof(struct iwl_statistics_cmd),
1465                                         &statistics_cmd);
1466 }
1467 EXPORT_SYMBOL(iwl_send_statistics_request);
1468
1469 /**
1470  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1471  *   using sample data 100 bytes apart.  If these sample points are good,
1472  *   it's a pretty good bet that everything between them is good, too.
1473  */
1474 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1475 {
1476         u32 val;
1477         int ret = 0;
1478         u32 errcnt = 0;
1479         u32 i;
1480
1481         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1482
1483         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1484                 /* read data comes through single port, auto-incr addr */
1485                 /* NOTE: Use the debugless read so we don't flood kernel log
1486                  * if IWL_DL_IO is set */
1487                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1488                         i + IWL49_RTC_INST_LOWER_BOUND);
1489                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1490                 if (val != le32_to_cpu(*image)) {
1491                         ret = -EIO;
1492                         errcnt++;
1493                         if (errcnt >= 3)
1494                                 break;
1495                 }
1496         }
1497
1498         return ret;
1499 }
1500
1501 /**
1502  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1503  *     looking at all data.
1504  */
1505 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1506                                  u32 len)
1507 {
1508         u32 val;
1509         u32 save_len = len;
1510         int ret = 0;
1511         u32 errcnt;
1512
1513         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1514
1515         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1516                            IWL49_RTC_INST_LOWER_BOUND);
1517
1518         errcnt = 0;
1519         for (; len > 0; len -= sizeof(u32), image++) {
1520                 /* read data comes through single port, auto-incr addr */
1521                 /* NOTE: Use the debugless read so we don't flood kernel log
1522                  * if IWL_DL_IO is set */
1523                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1524                 if (val != le32_to_cpu(*image)) {
1525                         IWL_ERR(priv, "uCode INST section is invalid at "
1526                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1527                                   save_len - len, val, le32_to_cpu(*image));
1528                         ret = -EIO;
1529                         errcnt++;
1530                         if (errcnt >= 20)
1531                                 break;
1532                 }
1533         }
1534
1535         if (!errcnt)
1536                 IWL_DEBUG_INFO(priv,
1537                     "ucode image in INSTRUCTION memory is good\n");
1538
1539         return ret;
1540 }
1541
1542 /**
1543  * iwl_verify_ucode - determine which instruction image is in SRAM,
1544  *    and verify its contents
1545  */
1546 int iwl_verify_ucode(struct iwl_priv *priv)
1547 {
1548         __le32 *image;
1549         u32 len;
1550         int ret;
1551
1552         /* Try bootstrap */
1553         image = (__le32 *)priv->ucode_boot.v_addr;
1554         len = priv->ucode_boot.len;
1555         ret = iwlcore_verify_inst_sparse(priv, image, len);
1556         if (!ret) {
1557                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1558                 return 0;
1559         }
1560
1561         /* Try initialize */
1562         image = (__le32 *)priv->ucode_init.v_addr;
1563         len = priv->ucode_init.len;
1564         ret = iwlcore_verify_inst_sparse(priv, image, len);
1565         if (!ret) {
1566                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1567                 return 0;
1568         }
1569
1570         /* Try runtime/protocol */
1571         image = (__le32 *)priv->ucode_code.v_addr;
1572         len = priv->ucode_code.len;
1573         ret = iwlcore_verify_inst_sparse(priv, image, len);
1574         if (!ret) {
1575                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1576                 return 0;
1577         }
1578
1579         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1580
1581         /* Since nothing seems to match, show first several data entries in
1582          * instruction SRAM, so maybe visual inspection will give a clue.
1583          * Selection of bootstrap image (vs. other images) is arbitrary. */
1584         image = (__le32 *)priv->ucode_boot.v_addr;
1585         len = priv->ucode_boot.len;
1586         ret = iwl_verify_inst_full(priv, image, len);
1587
1588         return ret;
1589 }
1590 EXPORT_SYMBOL(iwl_verify_ucode);
1591
1592
1593 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1594 {
1595         struct iwl_ct_kill_config cmd;
1596         struct iwl_ct_kill_throttling_config adv_cmd;
1597         unsigned long flags;
1598         int ret = 0;
1599
1600         spin_lock_irqsave(&priv->lock, flags);
1601         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1602                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1603         spin_unlock_irqrestore(&priv->lock, flags);
1604         priv->thermal_throttle.ct_kill_toggle = false;
1605
1606         if (priv->cfg->support_ct_kill_exit) {
1607                 adv_cmd.critical_temperature_enter =
1608                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1609                 adv_cmd.critical_temperature_exit =
1610                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1611
1612                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1613                                        sizeof(adv_cmd), &adv_cmd);
1614                 if (ret)
1615                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1616                 else
1617                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1618                                         "succeeded, "
1619                                         "critical temperature enter is %d,"
1620                                         "exit is %d\n",
1621                                        priv->hw_params.ct_kill_threshold,
1622                                        priv->hw_params.ct_kill_exit_threshold);
1623         } else {
1624                 cmd.critical_temperature_R =
1625                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1626
1627                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1628                                        sizeof(cmd), &cmd);
1629                 if (ret)
1630                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1631                 else
1632                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1633                                         "succeeded, "
1634                                         "critical temperature is %d\n",
1635                                         priv->hw_params.ct_kill_threshold);
1636         }
1637 }
1638 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1639
1640
1641 /*
1642  * CARD_STATE_CMD
1643  *
1644  * Use: Sets the device's internal card state to enable, disable, or halt
1645  *
1646  * When in the 'enable' state the card operates as normal.
1647  * When in the 'disable' state, the card enters into a low power mode.
1648  * When in the 'halt' state, the card is shut down and must be fully
1649  * restarted to come back on.
1650  */
1651 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1652 {
1653         struct iwl_host_cmd cmd = {
1654                 .id = REPLY_CARD_STATE_CMD,
1655                 .len = sizeof(u32),
1656                 .data = &flags,
1657                 .flags = meta_flag,
1658         };
1659
1660         return iwl_send_cmd(priv, &cmd);
1661 }
1662
1663 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1664                            struct iwl_rx_mem_buffer *rxb)
1665 {
1666 #ifdef CONFIG_IWLWIFI_DEBUG
1667         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1668         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1669         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1670                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1671 #endif
1672 }
1673 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1674
1675 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1676                                       struct iwl_rx_mem_buffer *rxb)
1677 {
1678         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1679         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1680         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1681                         "notification for %s:\n", len,
1682                         get_cmd_string(pkt->hdr.cmd));
1683         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1684 }
1685 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1686
1687 void iwl_rx_reply_error(struct iwl_priv *priv,
1688                         struct iwl_rx_mem_buffer *rxb)
1689 {
1690         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1691
1692         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1693                 "seq 0x%04X ser 0x%08X\n",
1694                 le32_to_cpu(pkt->u.err_resp.error_type),
1695                 get_cmd_string(pkt->u.err_resp.cmd_id),
1696                 pkt->u.err_resp.cmd_id,
1697                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1698                 le32_to_cpu(pkt->u.err_resp.error_info));
1699 }
1700 EXPORT_SYMBOL(iwl_rx_reply_error);
1701
1702 void iwl_clear_isr_stats(struct iwl_priv *priv)
1703 {
1704         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1705 }
1706
1707 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1708                            const struct ieee80211_tx_queue_params *params)
1709 {
1710         struct iwl_priv *priv = hw->priv;
1711         unsigned long flags;
1712         int q;
1713
1714         IWL_DEBUG_MAC80211(priv, "enter\n");
1715
1716         if (!iwl_is_ready_rf(priv)) {
1717                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1718                 return -EIO;
1719         }
1720
1721         if (queue >= AC_NUM) {
1722                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1723                 return 0;
1724         }
1725
1726         q = AC_NUM - 1 - queue;
1727
1728         spin_lock_irqsave(&priv->lock, flags);
1729
1730         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1731         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1732         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1733         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1734                         cpu_to_le16((params->txop * 32));
1735
1736         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1737
1738         spin_unlock_irqrestore(&priv->lock, flags);
1739
1740         IWL_DEBUG_MAC80211(priv, "leave\n");
1741         return 0;
1742 }
1743 EXPORT_SYMBOL(iwl_mac_conf_tx);
1744
1745 static void iwl_ht_conf(struct iwl_priv *priv,
1746                         struct ieee80211_bss_conf *bss_conf)
1747 {
1748         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1749         struct ieee80211_sta *sta;
1750
1751         IWL_DEBUG_MAC80211(priv, "enter:\n");
1752
1753         if (!ht_conf->is_ht)
1754                 return;
1755
1756         ht_conf->ht_protection =
1757                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1758         ht_conf->non_GF_STA_present =
1759                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1760
1761         ht_conf->single_chain_sufficient = false;
1762
1763         switch (priv->iw_mode) {
1764         case NL80211_IFTYPE_STATION:
1765                 rcu_read_lock();
1766                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1767                 if (sta) {
1768                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1769                         int maxstreams;
1770
1771                         maxstreams = (ht_cap->mcs.tx_params &
1772                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1773                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1774                         maxstreams += 1;
1775
1776                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1777                             (ht_cap->mcs.rx_mask[2] == 0))
1778                                 ht_conf->single_chain_sufficient = true;
1779                         if (maxstreams <= 1)
1780                                 ht_conf->single_chain_sufficient = true;
1781                 } else {
1782                         /*
1783                          * If at all, this can only happen through a race
1784                          * when the AP disconnects us while we're still
1785                          * setting up the connection, in that case mac80211
1786                          * will soon tell us about that.
1787                          */
1788                         ht_conf->single_chain_sufficient = true;
1789                 }
1790                 rcu_read_unlock();
1791                 break;
1792         case NL80211_IFTYPE_ADHOC:
1793                 ht_conf->single_chain_sufficient = true;
1794                 break;
1795         default:
1796                 break;
1797         }
1798
1799         IWL_DEBUG_MAC80211(priv, "leave\n");
1800 }
1801
1802 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1803 {
1804         priv->assoc_id = 0;
1805         iwl_led_disassociate(priv);
1806         /*
1807          * inform the ucode that there is no longer an
1808          * association and that no more packets should be
1809          * sent
1810          */
1811         priv->staging_rxon.filter_flags &=
1812                 ~RXON_FILTER_ASSOC_MSK;
1813         priv->staging_rxon.assoc_id = 0;
1814         iwlcore_commit_rxon(priv);
1815 }
1816
1817 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1818                           struct ieee80211_vif *vif,
1819                           struct ieee80211_bss_conf *bss_conf,
1820                           u32 changes)
1821 {
1822         struct iwl_priv *priv = hw->priv;
1823         int ret;
1824
1825         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1826
1827         if (!iwl_is_alive(priv))
1828                 return;
1829
1830         mutex_lock(&priv->mutex);
1831
1832         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1833                 dev_kfree_skb(priv->ibss_beacon);
1834                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1835         }
1836
1837         if (changes & BSS_CHANGED_BEACON_INT) {
1838                 priv->beacon_int = bss_conf->beacon_int;
1839                 /* TODO: in AP mode, do something to make this take effect */
1840         }
1841
1842         if (changes & BSS_CHANGED_BSSID) {
1843                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1844
1845                 /*
1846                  * If there is currently a HW scan going on in the
1847                  * background then we need to cancel it else the RXON
1848                  * below/in post_associate will fail.
1849                  */
1850                 if (iwl_scan_cancel_timeout(priv, 100)) {
1851                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1852                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1853                         mutex_unlock(&priv->mutex);
1854                         return;
1855                 }
1856
1857                 /* mac80211 only sets assoc when in STATION mode */
1858                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1859                         memcpy(priv->staging_rxon.bssid_addr,
1860                                bss_conf->bssid, ETH_ALEN);
1861
1862                         /* currently needed in a few places */
1863                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1864                 } else {
1865                         priv->staging_rxon.filter_flags &=
1866                                 ~RXON_FILTER_ASSOC_MSK;
1867                 }
1868
1869         }
1870
1871         /*
1872          * This needs to be after setting the BSSID in case
1873          * mac80211 decides to do both changes at once because
1874          * it will invoke post_associate.
1875          */
1876         if (vif->type == NL80211_IFTYPE_ADHOC &&
1877             changes & BSS_CHANGED_BEACON) {
1878                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1879
1880                 if (beacon)
1881                         iwl_mac_beacon_update(hw, beacon);
1882         }
1883
1884         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1885                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1886                                    bss_conf->use_short_preamble);
1887                 if (bss_conf->use_short_preamble)
1888                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1889                 else
1890                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1891         }
1892
1893         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1894                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1895                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1896                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1897                 else
1898                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1899         }
1900
1901         if (changes & BSS_CHANGED_BASIC_RATES) {
1902                 /* XXX use this information
1903                  *
1904                  * To do that, remove code from iwl_set_rate() and put something
1905                  * like this here:
1906                  *
1907                 if (A-band)
1908                         priv->staging_rxon.ofdm_basic_rates =
1909                                 bss_conf->basic_rates;
1910                 else
1911                         priv->staging_rxon.ofdm_basic_rates =
1912                                 bss_conf->basic_rates >> 4;
1913                         priv->staging_rxon.cck_basic_rates =
1914                                 bss_conf->basic_rates & 0xF;
1915                  */
1916         }
1917
1918         if (changes & BSS_CHANGED_HT) {
1919                 iwl_ht_conf(priv, bss_conf);
1920
1921                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1922                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1923         }
1924
1925         if (changes & BSS_CHANGED_ASSOC) {
1926                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1927                 if (bss_conf->assoc) {
1928                         priv->assoc_id = bss_conf->aid;
1929                         priv->beacon_int = bss_conf->beacon_int;
1930                         priv->timestamp = bss_conf->timestamp;
1931                         priv->assoc_capability = bss_conf->assoc_capability;
1932
1933                         iwl_led_associate(priv);
1934
1935                         if (!iwl_is_rfkill(priv))
1936                                 priv->cfg->ops->lib->post_associate(priv);
1937                 } else
1938                         iwl_set_no_assoc(priv);
1939         }
1940
1941         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
1942                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1943                                    changes);
1944                 ret = iwl_send_rxon_assoc(priv);
1945                 if (!ret) {
1946                         /* Sync active_rxon with latest change. */
1947                         memcpy((void *)&priv->active_rxon,
1948                                 &priv->staging_rxon,
1949                                 sizeof(struct iwl_rxon_cmd));
1950                 }
1951         }
1952
1953         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1954                 if (vif->bss_conf.enable_beacon) {
1955                         memcpy(priv->staging_rxon.bssid_addr,
1956                                bss_conf->bssid, ETH_ALEN);
1957                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1958                         iwlcore_config_ap(priv);
1959                 } else
1960                         iwl_set_no_assoc(priv);
1961         }
1962
1963         if (changes & BSS_CHANGED_IBSS) {
1964                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1965                                                         bss_conf->ibss_joined);
1966                 if (ret)
1967                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1968                                 bss_conf->ibss_joined ? "add" : "remove",
1969                                 bss_conf->bssid);
1970         }
1971
1972         mutex_unlock(&priv->mutex);
1973
1974         IWL_DEBUG_MAC80211(priv, "leave\n");
1975 }
1976 EXPORT_SYMBOL(iwl_bss_info_changed);
1977
1978 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1979 {
1980         struct iwl_priv *priv = hw->priv;
1981         unsigned long flags;
1982         __le64 timestamp;
1983
1984         IWL_DEBUG_MAC80211(priv, "enter\n");
1985
1986         if (!iwl_is_ready_rf(priv)) {
1987                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1988                 return -EIO;
1989         }
1990
1991         spin_lock_irqsave(&priv->lock, flags);
1992
1993         if (priv->ibss_beacon)
1994                 dev_kfree_skb(priv->ibss_beacon);
1995
1996         priv->ibss_beacon = skb;
1997
1998         priv->assoc_id = 0;
1999         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2000         priv->timestamp = le64_to_cpu(timestamp);
2001
2002         IWL_DEBUG_MAC80211(priv, "leave\n");
2003         spin_unlock_irqrestore(&priv->lock, flags);
2004
2005         priv->cfg->ops->lib->post_associate(priv);
2006
2007         return 0;
2008 }
2009 EXPORT_SYMBOL(iwl_mac_beacon_update);
2010
2011 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2012 {
2013         iwl_connection_init_rx_config(priv, vif->type);
2014
2015         if (priv->cfg->ops->hcmd->set_rxon_chain)
2016                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2017
2018         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2019
2020         return iwlcore_commit_rxon(priv);
2021 }
2022
2023 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2024 {
2025         struct iwl_priv *priv = hw->priv;
2026         int err = 0;
2027
2028         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2029
2030         mutex_lock(&priv->mutex);
2031
2032         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2033                 err = -EINVAL;
2034                 goto out;
2035         }
2036
2037         if (priv->vif) {
2038                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2039                 err = -EOPNOTSUPP;
2040                 goto out;
2041         }
2042
2043         priv->vif = vif;
2044         priv->iw_mode = vif->type;
2045
2046         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2047         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2048
2049         err = iwl_set_mode(priv, vif);
2050         if (err)
2051                 goto out_err;
2052
2053         /* Add the broadcast address so we can send broadcast frames */
2054         err = priv->cfg->ops->lib->add_bcast_station(priv);
2055         if (err)
2056                 goto out_err;
2057
2058         goto out;
2059
2060  out_err:
2061         priv->vif = NULL;
2062         priv->iw_mode = NL80211_IFTYPE_STATION;
2063  out:
2064         mutex_unlock(&priv->mutex);
2065
2066         IWL_DEBUG_MAC80211(priv, "leave\n");
2067         return err;
2068 }
2069 EXPORT_SYMBOL(iwl_mac_add_interface);
2070
2071 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2072                               struct ieee80211_vif *vif)
2073 {
2074         struct iwl_priv *priv = hw->priv;
2075
2076         IWL_DEBUG_MAC80211(priv, "enter\n");
2077
2078         mutex_lock(&priv->mutex);
2079
2080         iwl_clear_ucode_stations(priv, true);
2081
2082         if (iwl_is_ready_rf(priv)) {
2083                 iwl_scan_cancel_timeout(priv, 100);
2084                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2085                 iwlcore_commit_rxon(priv);
2086         }
2087         if (priv->vif == vif) {
2088                 priv->vif = NULL;
2089                 memset(priv->bssid, 0, ETH_ALEN);
2090         }
2091         mutex_unlock(&priv->mutex);
2092
2093         IWL_DEBUG_MAC80211(priv, "leave\n");
2094
2095 }
2096 EXPORT_SYMBOL(iwl_mac_remove_interface);
2097
2098 /**
2099  * iwl_mac_config - mac80211 config callback
2100  */
2101 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2102 {
2103         struct iwl_priv *priv = hw->priv;
2104         const struct iwl_channel_info *ch_info;
2105         struct ieee80211_conf *conf = &hw->conf;
2106         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2107         unsigned long flags = 0;
2108         int ret = 0;
2109         u16 ch;
2110         int scan_active = 0;
2111
2112         mutex_lock(&priv->mutex);
2113
2114         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2115                                         conf->channel->hw_value, changed);
2116
2117         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2118                         test_bit(STATUS_SCANNING, &priv->status))) {
2119                 scan_active = 1;
2120                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2121         }
2122
2123         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2124                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2125                 /* mac80211 uses static for non-HT which is what we want */
2126                 priv->current_ht_config.smps = conf->smps_mode;
2127
2128                 /*
2129                  * Recalculate chain counts.
2130                  *
2131                  * If monitor mode is enabled then mac80211 will
2132                  * set up the SM PS mode to OFF if an HT channel is
2133                  * configured.
2134                  */
2135                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2136                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2137         }
2138
2139         /* during scanning mac80211 will delay channel setting until
2140          * scan finish with changed = 0
2141          */
2142         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2143                 if (scan_active)
2144                         goto set_ch_out;
2145
2146                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2147                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2148                 if (!is_channel_valid(ch_info)) {
2149                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2150                         ret = -EINVAL;
2151                         goto set_ch_out;
2152                 }
2153
2154                 spin_lock_irqsave(&priv->lock, flags);
2155
2156                 /* Configure HT40 channels */
2157                 ht_conf->is_ht = conf_is_ht(conf);
2158                 if (ht_conf->is_ht) {
2159                         if (conf_is_ht40_minus(conf)) {
2160                                 ht_conf->extension_chan_offset =
2161                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2162                                 ht_conf->is_40mhz = true;
2163                         } else if (conf_is_ht40_plus(conf)) {
2164                                 ht_conf->extension_chan_offset =
2165                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2166                                 ht_conf->is_40mhz = true;
2167                         } else {
2168                                 ht_conf->extension_chan_offset =
2169                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2170                                 ht_conf->is_40mhz = false;
2171                         }
2172                 } else
2173                         ht_conf->is_40mhz = false;
2174                 /* Default to no protection. Protection mode will later be set
2175                  * from BSS config in iwl_ht_conf */
2176                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2177
2178                 /* if we are switching from ht to 2.4 clear flags
2179                  * from any ht related info since 2.4 does not
2180                  * support ht */
2181                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2182                         priv->staging_rxon.flags = 0;
2183
2184                 iwl_set_rxon_channel(priv, conf->channel);
2185                 iwl_set_rxon_ht(priv, ht_conf);
2186
2187                 iwl_set_flags_for_band(priv, conf->channel->band);
2188                 spin_unlock_irqrestore(&priv->lock, flags);
2189                 if (iwl_is_associated(priv) &&
2190                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2191                     priv->cfg->ops->lib->set_channel_switch) {
2192                         iwl_set_rate(priv);
2193                         /*
2194                          * at this point, staging_rxon has the
2195                          * configuration for channel switch
2196                          */
2197                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2198                                 ch);
2199                         if (!ret) {
2200                                 iwl_print_rx_config_cmd(priv);
2201                                 goto out;
2202                         }
2203                         priv->switch_rxon.switch_in_progress = false;
2204                 }
2205  set_ch_out:
2206                 /* The list of supported rates and rate mask can be different
2207                  * for each band; since the band may have changed, reset
2208                  * the rate mask to what mac80211 lists */
2209                 iwl_set_rate(priv);
2210         }
2211
2212         if (changed & (IEEE80211_CONF_CHANGE_PS |
2213                         IEEE80211_CONF_CHANGE_IDLE)) {
2214                 ret = iwl_power_update_mode(priv, false);
2215                 if (ret)
2216                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2217         }
2218
2219         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2220                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2221                         priv->tx_power_user_lmt, conf->power_level);
2222
2223                 iwl_set_tx_power(priv, conf->power_level, false);
2224         }
2225
2226         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2227                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2228
2229                 spin_lock_irqsave(&priv->lock, flags);
2230                 priv->qos_data.qos_active = qos_active;
2231                 iwl_update_qos(priv);
2232                 spin_unlock_irqrestore(&priv->lock, flags);
2233         }
2234
2235         if (!iwl_is_ready(priv)) {
2236                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2237                 goto out;
2238         }
2239
2240         if (scan_active)
2241                 goto out;
2242
2243         if (memcmp(&priv->active_rxon,
2244                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2245                 iwlcore_commit_rxon(priv);
2246         else
2247                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2248
2249
2250 out:
2251         IWL_DEBUG_MAC80211(priv, "leave\n");
2252         mutex_unlock(&priv->mutex);
2253         return ret;
2254 }
2255 EXPORT_SYMBOL(iwl_mac_config);
2256
2257 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2258 {
2259         struct iwl_priv *priv = hw->priv;
2260         unsigned long flags;
2261
2262         mutex_lock(&priv->mutex);
2263         IWL_DEBUG_MAC80211(priv, "enter\n");
2264
2265         spin_lock_irqsave(&priv->lock, flags);
2266         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2267         spin_unlock_irqrestore(&priv->lock, flags);
2268
2269         spin_lock_irqsave(&priv->lock, flags);
2270         priv->assoc_id = 0;
2271         priv->assoc_capability = 0;
2272
2273         /* new association get rid of ibss beacon skb */
2274         if (priv->ibss_beacon)
2275                 dev_kfree_skb(priv->ibss_beacon);
2276
2277         priv->ibss_beacon = NULL;
2278
2279         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2280         priv->timestamp = 0;
2281
2282         spin_unlock_irqrestore(&priv->lock, flags);
2283
2284         if (!iwl_is_ready_rf(priv)) {
2285                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2286                 mutex_unlock(&priv->mutex);
2287                 return;
2288         }
2289
2290         /* we are restarting association process
2291          * clear RXON_FILTER_ASSOC_MSK bit
2292          */
2293         iwl_scan_cancel_timeout(priv, 100);
2294         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2295         iwlcore_commit_rxon(priv);
2296
2297         iwl_set_rate(priv);
2298
2299         mutex_unlock(&priv->mutex);
2300
2301         IWL_DEBUG_MAC80211(priv, "leave\n");
2302 }
2303 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2304
2305 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2306 {
2307         if (!priv->txq)
2308                 priv->txq = kzalloc(
2309                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2310                         GFP_KERNEL);
2311         if (!priv->txq) {
2312                 IWL_ERR(priv, "Not enough memory for txq\n");
2313                 return -ENOMEM;
2314         }
2315         return 0;
2316 }
2317 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2318
2319 void iwl_free_txq_mem(struct iwl_priv *priv)
2320 {
2321         kfree(priv->txq);
2322         priv->txq = NULL;
2323 }
2324 EXPORT_SYMBOL(iwl_free_txq_mem);
2325
2326 #ifdef CONFIG_IWLWIFI_DEBUGFS
2327
2328 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2329
2330 void iwl_reset_traffic_log(struct iwl_priv *priv)
2331 {
2332         priv->tx_traffic_idx = 0;
2333         priv->rx_traffic_idx = 0;
2334         if (priv->tx_traffic)
2335                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2336         if (priv->rx_traffic)
2337                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2338 }
2339
2340 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2341 {
2342         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2343
2344         if (iwl_debug_level & IWL_DL_TX) {
2345                 if (!priv->tx_traffic) {
2346                         priv->tx_traffic =
2347                                 kzalloc(traffic_size, GFP_KERNEL);
2348                         if (!priv->tx_traffic)
2349                                 return -ENOMEM;
2350                 }
2351         }
2352         if (iwl_debug_level & IWL_DL_RX) {
2353                 if (!priv->rx_traffic) {
2354                         priv->rx_traffic =
2355                                 kzalloc(traffic_size, GFP_KERNEL);
2356                         if (!priv->rx_traffic)
2357                                 return -ENOMEM;
2358                 }
2359         }
2360         iwl_reset_traffic_log(priv);
2361         return 0;
2362 }
2363 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2364
2365 void iwl_free_traffic_mem(struct iwl_priv *priv)
2366 {
2367         kfree(priv->tx_traffic);
2368         priv->tx_traffic = NULL;
2369
2370         kfree(priv->rx_traffic);
2371         priv->rx_traffic = NULL;
2372 }
2373 EXPORT_SYMBOL(iwl_free_traffic_mem);
2374
2375 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2376                       u16 length, struct ieee80211_hdr *header)
2377 {
2378         __le16 fc;
2379         u16 len;
2380
2381         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2382                 return;
2383
2384         if (!priv->tx_traffic)
2385                 return;
2386
2387         fc = header->frame_control;
2388         if (ieee80211_is_data(fc)) {
2389                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2390                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2391                 memcpy((priv->tx_traffic +
2392                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2393                        header, len);
2394                 priv->tx_traffic_idx =
2395                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2396         }
2397 }
2398 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2399
2400 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2401                       u16 length, struct ieee80211_hdr *header)
2402 {
2403         __le16 fc;
2404         u16 len;
2405
2406         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2407                 return;
2408
2409         if (!priv->rx_traffic)
2410                 return;
2411
2412         fc = header->frame_control;
2413         if (ieee80211_is_data(fc)) {
2414                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2415                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2416                 memcpy((priv->rx_traffic +
2417                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2418                        header, len);
2419                 priv->rx_traffic_idx =
2420                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2421         }
2422 }
2423 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2424
2425 const char *get_mgmt_string(int cmd)
2426 {
2427         switch (cmd) {
2428                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2429                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2430                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2431                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2432                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2433                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2434                 IWL_CMD(MANAGEMENT_BEACON);
2435                 IWL_CMD(MANAGEMENT_ATIM);
2436                 IWL_CMD(MANAGEMENT_DISASSOC);
2437                 IWL_CMD(MANAGEMENT_AUTH);
2438                 IWL_CMD(MANAGEMENT_DEAUTH);
2439                 IWL_CMD(MANAGEMENT_ACTION);
2440         default:
2441                 return "UNKNOWN";
2442
2443         }
2444 }
2445
2446 const char *get_ctrl_string(int cmd)
2447 {
2448         switch (cmd) {
2449                 IWL_CMD(CONTROL_BACK_REQ);
2450                 IWL_CMD(CONTROL_BACK);
2451                 IWL_CMD(CONTROL_PSPOLL);
2452                 IWL_CMD(CONTROL_RTS);
2453                 IWL_CMD(CONTROL_CTS);
2454                 IWL_CMD(CONTROL_ACK);
2455                 IWL_CMD(CONTROL_CFEND);
2456                 IWL_CMD(CONTROL_CFENDACK);
2457         default:
2458                 return "UNKNOWN";
2459
2460         }
2461 }
2462
2463 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2464 {
2465         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2466         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2467         priv->led_tpt = 0;
2468 }
2469
2470 /*
2471  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2472  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2473  * Use debugFs to display the rx/rx_statistics
2474  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2475  * information will be recorded, but DATA pkt still will be recorded
2476  * for the reason of iwl_led.c need to control the led blinking based on
2477  * number of tx and rx data.
2478  *
2479  */
2480 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2481 {
2482         struct traffic_stats    *stats;
2483
2484         if (is_tx)
2485                 stats = &priv->tx_stats;
2486         else
2487                 stats = &priv->rx_stats;
2488
2489         if (ieee80211_is_mgmt(fc)) {
2490                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2491                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2492                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2493                         break;
2494                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2495                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2496                         break;
2497                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2498                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2499                         break;
2500                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2501                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2502                         break;
2503                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2504                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2505                         break;
2506                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2507                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2508                         break;
2509                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2510                         stats->mgmt[MANAGEMENT_BEACON]++;
2511                         break;
2512                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2513                         stats->mgmt[MANAGEMENT_ATIM]++;
2514                         break;
2515                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2516                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2517                         break;
2518                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2519                         stats->mgmt[MANAGEMENT_AUTH]++;
2520                         break;
2521                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2522                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2523                         break;
2524                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2525                         stats->mgmt[MANAGEMENT_ACTION]++;
2526                         break;
2527                 }
2528         } else if (ieee80211_is_ctl(fc)) {
2529                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2530                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2531                         stats->ctrl[CONTROL_BACK_REQ]++;
2532                         break;
2533                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2534                         stats->ctrl[CONTROL_BACK]++;
2535                         break;
2536                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2537                         stats->ctrl[CONTROL_PSPOLL]++;
2538                         break;
2539                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2540                         stats->ctrl[CONTROL_RTS]++;
2541                         break;
2542                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2543                         stats->ctrl[CONTROL_CTS]++;
2544                         break;
2545                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2546                         stats->ctrl[CONTROL_ACK]++;
2547                         break;
2548                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2549                         stats->ctrl[CONTROL_CFEND]++;
2550                         break;
2551                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2552                         stats->ctrl[CONTROL_CFENDACK]++;
2553                         break;
2554                 }
2555         } else {
2556                 /* data */
2557                 stats->data_cnt++;
2558                 stats->data_bytes += len;
2559         }
2560         iwl_leds_background(priv);
2561 }
2562 EXPORT_SYMBOL(iwl_update_stats);
2563 #endif
2564
2565 const static char *get_csr_string(int cmd)
2566 {
2567         switch (cmd) {
2568                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2569                 IWL_CMD(CSR_INT_COALESCING);
2570                 IWL_CMD(CSR_INT);
2571                 IWL_CMD(CSR_INT_MASK);
2572                 IWL_CMD(CSR_FH_INT_STATUS);
2573                 IWL_CMD(CSR_GPIO_IN);
2574                 IWL_CMD(CSR_RESET);
2575                 IWL_CMD(CSR_GP_CNTRL);
2576                 IWL_CMD(CSR_HW_REV);
2577                 IWL_CMD(CSR_EEPROM_REG);
2578                 IWL_CMD(CSR_EEPROM_GP);
2579                 IWL_CMD(CSR_OTP_GP_REG);
2580                 IWL_CMD(CSR_GIO_REG);
2581                 IWL_CMD(CSR_GP_UCODE_REG);
2582                 IWL_CMD(CSR_GP_DRIVER_REG);
2583                 IWL_CMD(CSR_UCODE_DRV_GP1);
2584                 IWL_CMD(CSR_UCODE_DRV_GP2);
2585                 IWL_CMD(CSR_LED_REG);
2586                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2587                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2588                 IWL_CMD(CSR_ANA_PLL_CFG);
2589                 IWL_CMD(CSR_HW_REV_WA_REG);
2590                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2591         default:
2592                 return "UNKNOWN";
2593
2594         }
2595 }
2596
2597 void iwl_dump_csr(struct iwl_priv *priv)
2598 {
2599         int i;
2600         u32 csr_tbl[] = {
2601                 CSR_HW_IF_CONFIG_REG,
2602                 CSR_INT_COALESCING,
2603                 CSR_INT,
2604                 CSR_INT_MASK,
2605                 CSR_FH_INT_STATUS,
2606                 CSR_GPIO_IN,
2607                 CSR_RESET,
2608                 CSR_GP_CNTRL,
2609                 CSR_HW_REV,
2610                 CSR_EEPROM_REG,
2611                 CSR_EEPROM_GP,
2612                 CSR_OTP_GP_REG,
2613                 CSR_GIO_REG,
2614                 CSR_GP_UCODE_REG,
2615                 CSR_GP_DRIVER_REG,
2616                 CSR_UCODE_DRV_GP1,
2617                 CSR_UCODE_DRV_GP2,
2618                 CSR_LED_REG,
2619                 CSR_DRAM_INT_TBL_REG,
2620                 CSR_GIO_CHICKEN_BITS,
2621                 CSR_ANA_PLL_CFG,
2622                 CSR_HW_REV_WA_REG,
2623                 CSR_DBG_HPET_MEM_REG
2624         };
2625         IWL_ERR(priv, "CSR values:\n");
2626         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2627                 "CSR_INT_PERIODIC_REG)\n");
2628         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2629                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2630                         get_csr_string(csr_tbl[i]),
2631                         iwl_read32(priv, csr_tbl[i]));
2632         }
2633 }
2634 EXPORT_SYMBOL(iwl_dump_csr);
2635
2636 const static char *get_fh_string(int cmd)
2637 {
2638         switch (cmd) {
2639                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2640                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2641                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2642                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2643                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2644                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2645                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2646                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2647                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2648         default:
2649                 return "UNKNOWN";
2650
2651         }
2652 }
2653
2654 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2655 {
2656         int i;
2657 #ifdef CONFIG_IWLWIFI_DEBUG
2658         int pos = 0;
2659         size_t bufsz = 0;
2660 #endif
2661         u32 fh_tbl[] = {
2662                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2663                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2664                 FH_RSCSR_CHNL0_WPTR,
2665                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2666                 FH_MEM_RSSR_SHARED_CTRL_REG,
2667                 FH_MEM_RSSR_RX_STATUS_REG,
2668                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2669                 FH_TSSR_TX_STATUS_REG,
2670                 FH_TSSR_TX_ERROR_REG
2671         };
2672 #ifdef CONFIG_IWLWIFI_DEBUG
2673         if (display) {
2674                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2675                 *buf = kmalloc(bufsz, GFP_KERNEL);
2676                 if (!*buf)
2677                         return -ENOMEM;
2678                 pos += scnprintf(*buf + pos, bufsz - pos,
2679                                 "FH register values:\n");
2680                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2681                         pos += scnprintf(*buf + pos, bufsz - pos,
2682                                 "  %34s: 0X%08x\n",
2683                                 get_fh_string(fh_tbl[i]),
2684                                 iwl_read_direct32(priv, fh_tbl[i]));
2685                 }
2686                 return pos;
2687         }
2688 #endif
2689         IWL_ERR(priv, "FH register values:\n");
2690         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2691                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2692                         get_fh_string(fh_tbl[i]),
2693                         iwl_read_direct32(priv, fh_tbl[i]));
2694         }
2695         return 0;
2696 }
2697 EXPORT_SYMBOL(iwl_dump_fh);
2698
2699 static void iwl_force_rf_reset(struct iwl_priv *priv)
2700 {
2701         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2702                 return;
2703
2704         if (!iwl_is_associated(priv)) {
2705                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2706                 return;
2707         }
2708         /*
2709          * There is no easy and better way to force reset the radio,
2710          * the only known method is switching channel which will force to
2711          * reset and tune the radio.
2712          * Use internal short scan (single channel) operation to should
2713          * achieve this objective.
2714          * Driver should reset the radio when number of consecutive missed
2715          * beacon, or any other uCode error condition detected.
2716          */
2717         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2718         iwl_internal_short_hw_scan(priv);
2719 }
2720
2721
2722 int iwl_force_reset(struct iwl_priv *priv, int mode)
2723 {
2724         struct iwl_force_reset *force_reset;
2725
2726         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2727                 return -EINVAL;
2728
2729         if (mode >= IWL_MAX_FORCE_RESET) {
2730                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2731                 return -EINVAL;
2732         }
2733         force_reset = &priv->force_reset[mode];
2734         force_reset->reset_request_count++;
2735         if (force_reset->last_force_reset_jiffies &&
2736             time_after(force_reset->last_force_reset_jiffies +
2737             force_reset->reset_duration, jiffies)) {
2738                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2739                 force_reset->reset_reject_count++;
2740                 return -EAGAIN;
2741         }
2742         force_reset->reset_success_count++;
2743         force_reset->last_force_reset_jiffies = jiffies;
2744         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2745         switch (mode) {
2746         case IWL_RF_RESET:
2747                 iwl_force_rf_reset(priv);
2748                 break;
2749         case IWL_FW_RESET:
2750                 IWL_ERR(priv, "On demand firmware reload\n");
2751                 /* Set the FW error flag -- cleared on iwl_down */
2752                 set_bit(STATUS_FW_ERROR, &priv->status);
2753                 wake_up_interruptible(&priv->wait_command_queue);
2754                 /*
2755                  * Keep the restart process from trying to send host
2756                  * commands by clearing the INIT status bit
2757                  */
2758                 clear_bit(STATUS_READY, &priv->status);
2759                 queue_work(priv->workqueue, &priv->restart);
2760                 break;
2761         }
2762         return 0;
2763 }
2764 EXPORT_SYMBOL(iwl_force_reset);
2765
2766 /**
2767  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2768  *
2769  * During normal condition (no queue is stuck), the timer is continually set to
2770  * execute every monitor_recover_period milliseconds after the last timer
2771  * expired.  When the queue read_ptr is at the same place, the timer is
2772  * shorten to 100mSecs.  This is
2773  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2774  *      2) to detect the stuck queues quicker before the station and AP can
2775  *      disassociate each other.
2776  *
2777  * This function monitors all the tx queues and recover from it if any
2778  * of the queues are stuck.
2779  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2780  *      it will recover by resetting the firmware and return.
2781  * 2. Then, it checks for station association.  If it associates it will check
2782  *      other queues.  If any queue is stuck, it will recover by resetting
2783  *      the firmware.
2784  * Note: It the number of times the queue read_ptr to be at the same place to
2785  *      be MAX_REPEAT+1 in order to consider to be stuck.
2786  */
2787 /*
2788  * The maximum number of times the read pointer of the tx queue at the
2789  * same place without considering to be stuck.
2790  */
2791 #define MAX_REPEAT      (2)
2792 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2793 {
2794         struct iwl_tx_queue *txq;
2795         struct iwl_queue *q;
2796
2797         txq = &priv->txq[cnt];
2798         q = &txq->q;
2799         /* queue is empty, skip */
2800         if (q->read_ptr != q->write_ptr) {
2801                 if (q->read_ptr == q->last_read_ptr) {
2802                         /* a queue has not been read from last time */
2803                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2804                                 IWL_ERR(priv,
2805                                         "queue %d stuck %d time. Fw reload.\n",
2806                                         q->id, q->repeat_same_read_ptr);
2807                                 q->repeat_same_read_ptr = 0;
2808                                 iwl_force_reset(priv, IWL_FW_RESET);
2809                         } else {
2810                                 q->repeat_same_read_ptr++;
2811                                 IWL_DEBUG_RADIO(priv,
2812                                                 "queue %d, not read %d time\n",
2813                                                 q->id,
2814                                                 q->repeat_same_read_ptr);
2815                                 mod_timer(&priv->monitor_recover, jiffies +
2816                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2817                         }
2818                         return 1;
2819                 } else {
2820                         q->last_read_ptr = q->read_ptr;
2821                         q->repeat_same_read_ptr = 0;
2822                 }
2823         }
2824         return 0;
2825 }
2826
2827 void iwl_bg_monitor_recover(unsigned long data)
2828 {
2829         struct iwl_priv *priv = (struct iwl_priv *)data;
2830         int cnt;
2831
2832         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2833                 return;
2834
2835         /* monitor and check for stuck cmd queue */
2836         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2837                 return;
2838
2839         /* monitor and check for other stuck queues */
2840         if (iwl_is_associated(priv)) {
2841                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2842                         /* skip as we already checked the command queue */
2843                         if (cnt == IWL_CMD_QUEUE_NUM)
2844                                 continue;
2845                         if (iwl_check_stuck_queue(priv, cnt))
2846                                 return;
2847                 }
2848         }
2849         /*
2850          * Reschedule the timer to occur in
2851          * priv->cfg->monitor_recover_period
2852          */
2853         mod_timer(&priv->monitor_recover,
2854                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2855 }
2856 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2857
2858 #ifdef CONFIG_PM
2859
2860 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2861 {
2862         struct iwl_priv *priv = pci_get_drvdata(pdev);
2863
2864         /*
2865          * This function is called when system goes into suspend state
2866          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2867          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2868          * it will not call apm_ops.stop() to stop the DMA operation.
2869          * Calling apm_ops.stop here to make sure we stop the DMA.
2870          */
2871         priv->cfg->ops->lib->apm_ops.stop(priv);
2872
2873         pci_save_state(pdev);
2874         pci_disable_device(pdev);
2875         pci_set_power_state(pdev, PCI_D3hot);
2876
2877         return 0;
2878 }
2879 EXPORT_SYMBOL(iwl_pci_suspend);
2880
2881 int iwl_pci_resume(struct pci_dev *pdev)
2882 {
2883         struct iwl_priv *priv = pci_get_drvdata(pdev);
2884         int ret;
2885
2886         /*
2887          * We disable the RETRY_TIMEOUT register (0x41) to keep
2888          * PCI Tx retries from interfering with C3 CPU state.
2889          */
2890         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2891
2892         pci_set_power_state(pdev, PCI_D0);
2893         ret = pci_enable_device(pdev);
2894         if (ret)
2895                 return ret;
2896         pci_restore_state(pdev);
2897         iwl_enable_interrupts(priv);
2898
2899         return 0;
2900 }
2901 EXPORT_SYMBOL(iwl_pci_resume);
2902
2903 #endif /* CONFIG_PM */