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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <net/mac80211.h>
  35
  36 #include "iwl-eeprom.h"
  37 #include "iwl-dev.h" /* FIXME: remove */
  38 #include "iwl-debug.h"
  39 #include "iwl-core.h"
  40 #include "iwl-io.h"
  41 #include "iwl-power.h"
  42 #include "iwl-sta.h"
  43 #include "iwl-helpers.h"
  44
  45
  46 MODULE_DESCRIPTION("iwl core");
  47 MODULE_VERSION(IWLWIFI_VERSION);
  48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * set bt_coex_active to true, uCode will do kill/defer
  53  * every time the priority line is asserted (BT is sending signals on the
  54  * priority line in the PCIx).
  55  * set bt_coex_active to false, uCode will ignore the BT activity and
  56  * perform the normal operation
  57  *
  58  * User might experience transmit issue on some platform due to WiFi/BT
  59  * co-exist problem. The possible behaviors are:
  60  *   Able to scan and finding all the available AP
  61  *   Not able to associate with any AP
  62  * On those platforms, WiFi communication can be restored by set
  63  * "bt_coex_active" module parameter to "false"
  64  *
  65  * default: bt_coex_active = true (BT_COEX_ENABLE)
  66  */
  67 bool bt_coex_active = true;
  68 EXPORT_SYMBOL_GPL(bt_coex_active);
  69 module_param(bt_coex_active, bool, S_IRUGO);
  70 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  71
  72 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  73         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  74                                     IWL_RATE_SISO_##s##M_PLCP, \
  75                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  76                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  77                                     IWL_RATE_##r##M_IEEE,      \
  78                                     IWL_RATE_##ip##M_INDEX,    \
  79                                     IWL_RATE_##in##M_INDEX,    \
  80                                     IWL_RATE_##rp##M_INDEX,    \
  81                                     IWL_RATE_##rn##M_INDEX,    \
  82                                     IWL_RATE_##pp##M_INDEX,    \
  83                                     IWL_RATE_##np##M_INDEX }
  84
  85 u32 iwl_debug_level;
  86 EXPORT_SYMBOL(iwl_debug_level);
  87
  88 /*
  89  * Parameter order:
  90  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  91  *
  92  * If there isn't a valid next or previous rate then INV is used which
  93  * maps to IWL_RATE_INVALID
  94  *
  95  */
  96 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  97         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  98         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  99         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
 100         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 101         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 102         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 103         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 104         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 105         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 106         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 107         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 108         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 109         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 110         /* FIXME:RS:          ^^    should be INV (legacy) */
 111 };
 112 EXPORT_SYMBOL(iwl_rates);
 113
 114 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 115 {
 116         int idx = 0;
 117
 118         /* HT rate format */
 119         if (rate_n_flags & RATE_MCS_HT_MSK) {
 120                 idx = (rate_n_flags & 0xff);
 121
 122                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 123                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 124                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 125                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 126
 127                 idx += IWL_FIRST_OFDM_RATE;
 128                 /* skip 9M not supported in ht*/
 129                 if (idx >= IWL_RATE_9M_INDEX)
 130                         idx += 1;
 131                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 132                         return idx;
 133
 134         /* legacy rate format, search for match in table */
 135         } else {
 136                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 137                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 138                                 return idx;
 139         }
 140
 141         return -1;
 142 }
 143 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 144
 145 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
 146 {
 147         int i;
 148         u8 ind = ant;
 149
 150         if (priv->band == IEEE80211_BAND_2GHZ &&
 151             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
 152                 return 0;
 153
 154         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 155                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 156                 if (valid & BIT(ind))
 157                         return ind;
 158         }
 159         return ant;
 160 }
 161 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 162
 163 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 164 EXPORT_SYMBOL(iwl_bcast_addr);
 165
 166
 167 /* This function both allocates and initializes hw and priv. */
 168 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 169                 struct ieee80211_ops *hw_ops)
 170 {
 171         struct iwl_priv *priv;
 172
 173         /* mac80211 allocates memory for this device instance, including
 174          *   space for this driver's private structure */
 175         struct ieee80211_hw *hw =
 176                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 177         if (hw == NULL) {
 178                 pr_err("%s: Can not allocate network device\n",
 179                        cfg->name);
 180                 goto out;
 181         }
 182
 183         priv = hw->priv;
 184         priv->hw = hw;
 185
 186 out:
 187         return hw;
 188 }
 189 EXPORT_SYMBOL(iwl_alloc_all);
 190
 191 /*
 192  * QoS  support
 193 */
 194 static void iwl_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 195 {
 196         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 197                 return;
 198
 199         if (!ctx->is_active)
 200                 return;
 201
 202         ctx->qos_data.def_qos_parm.qos_flags = 0;
 203
 204         if (ctx->qos_data.qos_active)
 205                 ctx->qos_data.def_qos_parm.qos_flags |=
 206                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 207
 208         if (ctx->ht.enabled)
 209                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 210
 211         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 212                       ctx->qos_data.qos_active,
 213                       ctx->qos_data.def_qos_parm.qos_flags);
 214
 215         iwl_send_cmd_pdu_async(priv, ctx->qos_cmd,
 216                                sizeof(struct iwl_qosparam_cmd),
 217                                &ctx->qos_data.def_qos_parm, NULL);
 218 }
 219
 220 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 221 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 222 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 223                               struct ieee80211_sta_ht_cap *ht_info,
 224                               enum ieee80211_band band)
 225 {
 226         u16 max_bit_rate = 0;
 227         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 228         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 229
 230         ht_info->cap = 0;
 231         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 232
 233         ht_info->ht_supported = true;
 234
 235         if (priv->cfg->ht_params &&
 236             priv->cfg->ht_params->ht_greenfield_support)
 237                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 238         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 239         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 240         if (priv->hw_params.ht40_channel & BIT(band)) {
 241                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 242                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 243                 ht_info->mcs.rx_mask[4] = 0x01;
 244                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 245         }
 246
 247         if (priv->cfg->mod_params->amsdu_size_8K)
 248                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 249
 250         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 251         if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
 252                 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
 253         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 254         if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
 255                 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
 256
 257         ht_info->mcs.rx_mask[0] = 0xFF;
 258         if (rx_chains_num >= 2)
 259                 ht_info->mcs.rx_mask[1] = 0xFF;
 260         if (rx_chains_num >= 3)
 261                 ht_info->mcs.rx_mask[2] = 0xFF;
 262
 263         /* Highest supported Rx data rate */
 264         max_bit_rate *= rx_chains_num;
 265         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 266         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 267
 268         /* Tx MCS capabilities */
 269         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 270         if (tx_chains_num != rx_chains_num) {
 271                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 272                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 273                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 274         }
 275 }
 276
 277 /**
 278  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 279  */
 280 int iwlcore_init_geos(struct iwl_priv *priv)
 281 {
 282         struct iwl_channel_info *ch;
 283         struct ieee80211_supported_band *sband;
 284         struct ieee80211_channel *channels;
 285         struct ieee80211_channel *geo_ch;
 286         struct ieee80211_rate *rates;
 287         int i = 0;
 288
 289         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 290             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 291                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 292                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 293                 return 0;
 294         }
 295
 296         channels = kzalloc(sizeof(struct ieee80211_channel) *
 297                            priv->channel_count, GFP_KERNEL);
 298         if (!channels)
 299                 return -ENOMEM;
 300
 301         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 302                         GFP_KERNEL);
 303         if (!rates) {
 304                 kfree(channels);
 305                 return -ENOMEM;
 306         }
 307
 308         /* 5.2GHz channels start after the 2.4GHz channels */
 309         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 310         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 311         /* just OFDM */
 312         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 313         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 314
 315         if (priv->cfg->sku & IWL_SKU_N)
 316                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 317                                          IEEE80211_BAND_5GHZ);
 318
 319         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 320         sband->channels = channels;
 321         /* OFDM & CCK */
 322         sband->bitrates = rates;
 323         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 324
 325         if (priv->cfg->sku & IWL_SKU_N)
 326                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 327                                          IEEE80211_BAND_2GHZ);
 328
 329         priv->ieee_channels = channels;
 330         priv->ieee_rates = rates;
 331
 332         for (i = 0;  i < priv->channel_count; i++) {
 333                 ch = &priv->channel_info[i];
 334
 335                 /* FIXME: might be removed if scan is OK */
 336                 if (!is_channel_valid(ch))
 337                         continue;
 338
 339                 if (is_channel_a_band(ch))
 340                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 341                 else
 342                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 343
 344                 geo_ch = &sband->channels[sband->n_channels++];
 345
 346                 geo_ch->center_freq =
 347                                 ieee80211_channel_to_frequency(ch->channel);
 348                 geo_ch->max_power = ch->max_power_avg;
 349                 geo_ch->max_antenna_gain = 0xff;
 350                 geo_ch->hw_value = ch->channel;
 351
 352                 if (is_channel_valid(ch)) {
 353                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 354                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 355
 356                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 357                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 358
 359                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 360                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 361
 362                         geo_ch->flags |= ch->ht40_extension_channel;
 363
 364                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 365                                 priv->tx_power_device_lmt = ch->max_power_avg;
 366                 } else {
 367                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 368                 }
 369
 370                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 371                                 ch->channel, geo_ch->center_freq,
 372                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 373                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 374                                 "restricted" : "valid",
 375                                  geo_ch->flags);
 376         }
 377
 378         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 379              priv->cfg->sku & IWL_SKU_A) {
 380                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 381                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 382                            priv->pci_dev->device,
 383                            priv->pci_dev->subsystem_device);
 384                 priv->cfg->sku &= ~IWL_SKU_A;
 385         }
 386
 387         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 388                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 389                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 390
 391         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 392
 393         return 0;
 394 }
 395 EXPORT_SYMBOL(iwlcore_init_geos);
 396
 397 /*
 398  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 399  */
 400 void iwlcore_free_geos(struct iwl_priv *priv)
 401 {
 402         kfree(priv->ieee_channels);
 403         kfree(priv->ieee_rates);
 404         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 405 }
 406 EXPORT_SYMBOL(iwlcore_free_geos);
 407
 408 /*
 409  *  iwlcore_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
 410  *  function.
 411  */
 412 void iwlcore_tx_cmd_protection(struct iwl_priv *priv,
 413                                struct ieee80211_tx_info *info,
 414                                __le16 fc, __le32 *tx_flags)
 415 {
 416         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 417                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 418                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 419                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 420
 421                 if (!ieee80211_is_mgmt(fc))
 422                         return;
 423
 424                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 425                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
 426                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
 427                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
 428                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
 429                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 430                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
 431                         break;
 432                 }
 433         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 434                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 435                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 436                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 437         }
 438 }
 439 EXPORT_SYMBOL(iwlcore_tx_cmd_protection);
 440
 441
 442 static bool is_single_rx_stream(struct iwl_priv *priv)
 443 {
 444         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 445                priv->current_ht_config.single_chain_sufficient;
 446 }
 447
 448 static bool iwl_is_channel_extension(struct iwl_priv *priv,
 449                                      enum ieee80211_band band,
 450                                      u16 channel, u8 extension_chan_offset)
 451 {
 452         const struct iwl_channel_info *ch_info;
 453
 454         ch_info = iwl_get_channel_info(priv, band, channel);
 455         if (!is_channel_valid(ch_info))
 456                 return false;
 457
 458         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 459                 return !(ch_info->ht40_extension_channel &
 460                                         IEEE80211_CHAN_NO_HT40PLUS);
 461         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 462                 return !(ch_info->ht40_extension_channel &
 463                                         IEEE80211_CHAN_NO_HT40MINUS);
 464
 465         return false;
 466 }
 467
 468 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 469                             struct iwl_rxon_context *ctx,
 470                             struct ieee80211_sta_ht_cap *ht_cap)
 471 {
 472         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 473                 return false;
 474
 475         /*
 476          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 477          * the bit will not set if it is pure 40MHz case
 478          */
 479         if (ht_cap && !ht_cap->ht_supported)
 480                 return false;
 481
 482 #ifdef CONFIG_IWLWIFI_DEBUGFS
 483         if (priv->disable_ht40)
 484                 return false;
 485 #endif
 486
 487         return iwl_is_channel_extension(priv, priv->band,
 488                         le16_to_cpu(ctx->staging.channel),
 489                         ctx->ht.extension_chan_offset);
 490 }
 491 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 492
 493 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 494 {
 495         u16 new_val;
 496         u16 beacon_factor;
 497
 498         /*
 499          * If mac80211 hasn't given us a beacon interval, program
 500          * the default into the device (not checking this here
 501          * would cause the adjustment below to return the maximum
 502          * value, which may break PAN.)
 503          */
 504         if (!beacon_val)
 505                 return DEFAULT_BEACON_INTERVAL;
 506
 507         /*
 508          * If the beacon interval we obtained from the peer
 509          * is too large, we'll have to wake up more often
 510          * (and in IBSS case, we'll beacon too much)
 511          *
 512          * For example, if max_beacon_val is 4096, and the
 513          * requested beacon interval is 7000, we'll have to
 514          * use 3500 to be able to wake up on the beacons.
 515          *
 516          * This could badly influence beacon detection stats.
 517          */
 518
 519         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 520         new_val = beacon_val / beacon_factor;
 521
 522         if (!new_val)
 523                 new_val = max_beacon_val;
 524
 525         return new_val;
 526 }
 527
 528 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 529 {
 530         u64 tsf;
 531         s32 interval_tm, rem;
 532         struct ieee80211_conf *conf = NULL;
 533         u16 beacon_int;
 534         struct ieee80211_vif *vif = ctx->vif;
 535
 536         conf = ieee80211_get_hw_conf(priv->hw);
 537
 538         lockdep_assert_held(&priv->mutex);
 539
 540         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 541
 542         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 543         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 544
 545         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 546
 547         /*
 548          * TODO: For IBSS we need to get atim_window from mac80211,
 549          *       for now just always use 0
 550          */
 551         ctx->timing.atim_window = 0;
 552
 553         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 554             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 555             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 556             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 557             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 558                 ctx->timing.beacon_interval =
 559                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 560                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 561         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 562                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 563                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 564                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 565                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 566                     !ctx->vif->bss_conf.beacon_int)) {
 567                 ctx->timing.beacon_interval =
 568                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 569                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 570         } else {
 571                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 572                                 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
 573                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 574         }
 575
 576         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 577         interval_tm = beacon_int * TIME_UNIT;
 578         rem = do_div(tsf, interval_tm);
 579         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 580
 581         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 582
 583         IWL_DEBUG_ASSOC(priv,
 584                         "beacon interval %d beacon timer %d beacon tim %d\n",
 585                         le16_to_cpu(ctx->timing.beacon_interval),
 586                         le32_to_cpu(ctx->timing.beacon_init_val),
 587                         le16_to_cpu(ctx->timing.atim_window));
 588
 589         return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 590                                 sizeof(ctx->timing), &ctx->timing);
 591 }
 592 EXPORT_SYMBOL(iwl_send_rxon_timing);
 593
 594 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 595                            int hw_decrypt)
 596 {
 597         struct iwl_rxon_cmd *rxon = &ctx->staging;
 598
 599         if (hw_decrypt)
 600                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 601         else
 602                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 603
 604 }
 605 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 606
 607 /**
 608  * iwl_check_rxon_cmd - validate RXON structure is valid
 609  *
 610  * NOTE:  This is really only useful during development and can eventually
 611  * be #ifdef'd out once the driver is stable and folks aren't actively
 612  * making changes
 613  */
 614 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 615 {
 616         int error = 0;
 617         int counter = 1;
 618         struct iwl_rxon_cmd *rxon = &ctx->staging;
 619
 620         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 621                 error |= le32_to_cpu(rxon->flags &
 622                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 623                                  RXON_FLG_RADAR_DETECT_MSK));
 624                 if (error)
 625                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 626                                     counter++, error);
 627         } else {
 628                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 629                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 630                 if (error)
 631                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 632                                     counter++, error);
 633                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 634                 if (error)
 635                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 636                                     counter++, error);
 637         }
 638         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 639         if (error)
 640                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 641
 642         /* make sure basic rates 6Mbps and 1Mbps are supported */
 643         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 644                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 645         if (error)
 646                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 647
 648         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 649         if (error)
 650                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 651
 652         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 653                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 654         if (error)
 655                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 656                             counter++, error);
 657
 658         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 659                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 660         if (error)
 661                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 662                             counter++, error);
 663
 664         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 665                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 666         if (error)
 667                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 668                             counter++, error);
 669
 670         if (error)
 671                 IWL_WARN(priv, "Tuning to channel %d\n",
 672                             le16_to_cpu(rxon->channel));
 673
 674         if (error) {
 675                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 676                 return -1;
 677         }
 678         return 0;
 679 }
 680 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 681
 682 /**
 683  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 684  * @priv: staging_rxon is compared to active_rxon
 685  *
 686  * If the RXON structure is changing enough to require a new tune,
 687  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 688  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 689  */
 690 int iwl_full_rxon_required(struct iwl_priv *priv,
 691                            struct iwl_rxon_context *ctx)
 692 {
 693         const struct iwl_rxon_cmd *staging = &ctx->staging;
 694         const struct iwl_rxon_cmd *active = &ctx->active;
 695
 696 #define CHK(cond)                                                       \
 697         if ((cond)) {                                                   \
 698                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 699                 return 1;                                               \
 700         }
 701
 702 #define CHK_NEQ(c1, c2)                                         \
 703         if ((c1) != (c2)) {                                     \
 704                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 705                                #c1 " != " #c2 " - %d != %d\n",  \
 706                                (c1), (c2));                     \
 707                 return 1;                                       \
 708         }
 709
 710         /* These items are only settable from the full RXON command */
 711         CHK(!iwl_is_associated_ctx(ctx));
 712         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 713         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 714         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 715                                 active->wlap_bssid_addr));
 716         CHK_NEQ(staging->dev_type, active->dev_type);
 717         CHK_NEQ(staging->channel, active->channel);
 718         CHK_NEQ(staging->air_propagation, active->air_propagation);
 719         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 720                 active->ofdm_ht_single_stream_basic_rates);
 721         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 722                 active->ofdm_ht_dual_stream_basic_rates);
 723         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 724                 active->ofdm_ht_triple_stream_basic_rates);
 725         CHK_NEQ(staging->assoc_id, active->assoc_id);
 726
 727         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 728          * be updated with the RXON_ASSOC command -- however only some
 729          * flag transitions are allowed using RXON_ASSOC */
 730
 731         /* Check if we are not switching bands */
 732         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 733                 active->flags & RXON_FLG_BAND_24G_MSK);
 734
 735         /* Check if we are switching association toggle */
 736         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 737                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 738
 739 #undef CHK
 740 #undef CHK_NEQ
 741
 742         return 0;
 743 }
 744 EXPORT_SYMBOL(iwl_full_rxon_required);
 745
 746 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
 747                             struct iwl_rxon_context *ctx)
 748 {
 749         /*
 750          * Assign the lowest rate -- should really get this from
 751          * the beacon skb from mac80211.
 752          */
 753         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
 754                 return IWL_RATE_1M_PLCP;
 755         else
 756                 return IWL_RATE_6M_PLCP;
 757 }
 758 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 759
 760 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 761                              struct iwl_ht_config *ht_conf,
 762                              struct iwl_rxon_context *ctx)
 763 {
 764         struct iwl_rxon_cmd *rxon = &ctx->staging;
 765
 766         if (!ctx->ht.enabled) {
 767                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 768                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 769                         RXON_FLG_HT40_PROT_MSK |
 770                         RXON_FLG_HT_PROT_MSK);
 771                 return;
 772         }
 773
 774         /* FIXME: if the definition of ht.protection changed, the "translation"
 775          * will be needed for rxon->flags
 776          */
 777         rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
 778
 779         /* Set up channel bandwidth:
 780          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 781         /* clear the HT channel mode before set the mode */
 782         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 783                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 784         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 785                 /* pure ht40 */
 786                 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 787                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 788                         /* Note: control channel is opposite of extension channel */
 789                         switch (ctx->ht.extension_chan_offset) {
 790                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 791                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 792                                 break;
 793                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 794                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 795                                 break;
 796                         }
 797                 } else {
 798                         /* Note: control channel is opposite of extension channel */
 799                         switch (ctx->ht.extension_chan_offset) {
 800                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 801                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 802                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 803                                 break;
 804                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 805                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 806                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 807                                 break;
 808                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 809                         default:
 810                                 /* channel location only valid if in Mixed mode */
 811                                 IWL_ERR(priv, "invalid extension channel offset\n");
 812                                 break;
 813                         }
 814                 }
 815         } else {
 816                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 817         }
 818
 819         if (priv->cfg->ops->hcmd->set_rxon_chain)
 820                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 821
 822         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 823                         "extension channel offset 0x%x\n",
 824                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 825                         ctx->ht.extension_chan_offset);
 826 }
 827
 828 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 829 {
 830         struct iwl_rxon_context *ctx;
 831
 832         for_each_context(priv, ctx)
 833                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 834 }
 835 EXPORT_SYMBOL(iwl_set_rxon_ht);
 836
 837 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 838 #define IWL_NUM_RX_CHAINS_SINGLE        2
 839 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 840 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 841
 842 /*
 843  * Determine how many receiver/antenna chains to use.
 844  *
 845  * More provides better reception via diversity.  Fewer saves power
 846  * at the expense of throughput, but only when not in powersave to
 847  * start with.
 848  *
 849  * MIMO (dual stream) requires at least 2, but works better with 3.
 850  * This does not determine *which* chains to use, just how many.
 851  */
 852 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 853 {
 854         if (priv->cfg->bt_params &&
 855             priv->cfg->bt_params->advanced_bt_coexist &&
 856             (priv->bt_full_concurrent ||
 857              priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 858                 /*
 859                  * only use chain 'A' in bt high traffic load or
 860                  * full concurrency mode
 861                  */
 862                 return IWL_NUM_RX_CHAINS_SINGLE;
 863         }
 864         /* # of Rx chains to use when expecting MIMO. */
 865         if (is_single_rx_stream(priv))
 866                 return IWL_NUM_RX_CHAINS_SINGLE;
 867         else
 868                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 869 }
 870
 871 /*
 872  * When we are in power saving mode, unless device support spatial
 873  * multiplexing power save, use the active count for rx chain count.
 874  */
 875 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 876 {
 877         /* # Rx chains when idling, depending on SMPS mode */
 878         switch (priv->current_ht_config.smps) {
 879         case IEEE80211_SMPS_STATIC:
 880         case IEEE80211_SMPS_DYNAMIC:
 881                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 882         case IEEE80211_SMPS_OFF:
 883                 return active_cnt;
 884         default:
 885                 WARN(1, "invalid SMPS mode %d",
 886                      priv->current_ht_config.smps);
 887                 return active_cnt;
 888         }
 889 }
 890
 891 /* up to 4 chains */
 892 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 893 {
 894         u8 res;
 895         res = (chain_bitmap & BIT(0)) >> 0;
 896         res += (chain_bitmap & BIT(1)) >> 1;
 897         res += (chain_bitmap & BIT(2)) >> 2;
 898         res += (chain_bitmap & BIT(3)) >> 3;
 899         return res;
 900 }
 901
 902 /**
 903  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 904  *
 905  * Selects how many and which Rx receivers/antennas/chains to use.
 906  * This should not be used for scan command ... it puts data in wrong place.
 907  */
 908 void iwl_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 909 {
 910         bool is_single = is_single_rx_stream(priv);
 911         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 912         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 913         u32 active_chains;
 914         u16 rx_chain;
 915
 916         /* Tell uCode which antennas are actually connected.
 917          * Before first association, we assume all antennas are connected.
 918          * Just after first association, iwl_chain_noise_calibration()
 919          *    checks which antennas actually *are* connected. */
 920         if (priv->chain_noise_data.active_chains)
 921                 active_chains = priv->chain_noise_data.active_chains;
 922         else
 923                 active_chains = priv->hw_params.valid_rx_ant;
 924
 925         if (priv->cfg->bt_params &&
 926             priv->cfg->bt_params->advanced_bt_coexist &&
 927             (priv->bt_full_concurrent ||
 928              priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 929                 /*
 930                  * only use chain 'A' in bt high traffic load or
 931                  * full concurrency mode
 932                  */
 933                 active_chains = first_antenna(active_chains);
 934         }
 935
 936         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 937
 938         /* How many receivers should we use? */
 939         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 940         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 941
 942
 943         /* correct rx chain count according hw settings
 944          * and chain noise calibration
 945          */
 946         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 947         if (valid_rx_cnt < active_rx_cnt)
 948                 active_rx_cnt = valid_rx_cnt;
 949
 950         if (valid_rx_cnt < idle_rx_cnt)
 951                 idle_rx_cnt = valid_rx_cnt;
 952
 953         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 954         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 955
 956         ctx->staging.rx_chain = cpu_to_le16(rx_chain);
 957
 958         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 959                 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 960         else
 961                 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 962
 963         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 964                         ctx->staging.rx_chain,
 965                         active_rx_cnt, idle_rx_cnt);
 966
 967         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 968                 active_rx_cnt < idle_rx_cnt);
 969 }
 970 EXPORT_SYMBOL(iwl_set_rxon_chain);
 971
 972 /* Return valid, unused, channel for a passive scan to reset the RF */
 973 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 974                                  enum ieee80211_band band)
 975 {
 976         const struct iwl_channel_info *ch_info;
 977         int i;
 978         u8 channel = 0;
 979         u8 min, max;
 980         struct iwl_rxon_context *ctx;
 981
 982         if (band == IEEE80211_BAND_5GHZ) {
 983                 min = 14;
 984                 max = priv->channel_count;
 985         } else {
 986                 min = 0;
 987                 max = 14;
 988         }
 989
 990         for (i = min; i < max; i++) {
 991                 bool busy = false;
 992
 993                 for_each_context(priv, ctx) {
 994                         busy = priv->channel_info[i].channel ==
 995                                 le16_to_cpu(ctx->staging.channel);
 996                         if (busy)
 997                                 break;
 998                 }
 999
1000                 if (busy)
1001                         continue;
1002
1003                 channel = priv->channel_info[i].channel;
1004                 ch_info = iwl_get_channel_info(priv, band, channel);
1005                 if (is_channel_valid(ch_info))
1006                         break;
1007         }
1008
1009         return channel;
1010 }
1011 EXPORT_SYMBOL(iwl_get_single_channel_number);
1012
1013 /**
1014  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
1015  * @ch: requested channel as a pointer to struct ieee80211_channel
1016
1017  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1018  * in the staging RXON flag structure based on the ch->band
1019  */
1020 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
1021                          struct iwl_rxon_context *ctx)
1022 {
1023         enum ieee80211_band band = ch->band;
1024         u16 channel = ch->hw_value;
1025
1026         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
1027             (priv->band == band))
1028                 return 0;
1029
1030         ctx->staging.channel = cpu_to_le16(channel);
1031         if (band == IEEE80211_BAND_5GHZ)
1032                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
1033         else
1034                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
1035
1036         priv->band = band;
1037
1038         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1039
1040         return 0;
1041 }
1042 EXPORT_SYMBOL(iwl_set_rxon_channel);
1043
1044 void iwl_set_flags_for_band(struct iwl_priv *priv,
1045                             struct iwl_rxon_context *ctx,
1046                             enum ieee80211_band band,
1047                             struct ieee80211_vif *vif)
1048 {
1049         if (band == IEEE80211_BAND_5GHZ) {
1050                 ctx->staging.flags &=
1051                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1052                       | RXON_FLG_CCK_MSK);
1053                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1054         } else {
1055                 /* Copied from iwl_post_associate() */
1056                 if (vif && vif->bss_conf.use_short_slot)
1057                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1058                 else
1059                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1060
1061                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
1062                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
1063                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
1064         }
1065 }
1066 EXPORT_SYMBOL(iwl_set_flags_for_band);
1067
1068 /*
1069  * initialize rxon structure with default values from eeprom
1070  */
1071 void iwl_connection_init_rx_config(struct iwl_priv *priv,
1072                                    struct iwl_rxon_context *ctx)
1073 {
1074         const struct iwl_channel_info *ch_info;
1075
1076         memset(&ctx->staging, 0, sizeof(ctx->staging));
1077
1078         if (!ctx->vif) {
1079                 ctx->staging.dev_type = ctx->unused_devtype;
1080         } else switch (ctx->vif->type) {
1081         case NL80211_IFTYPE_AP:
1082                 ctx->staging.dev_type = ctx->ap_devtype;
1083                 break;
1084
1085         case NL80211_IFTYPE_STATION:
1086                 ctx->staging.dev_type = ctx->station_devtype;
1087                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1088                 break;
1089
1090         case NL80211_IFTYPE_ADHOC:
1091                 ctx->staging.dev_type = ctx->ibss_devtype;
1092                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1093                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1094                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1095                 break;
1096
1097         default:
1098                 IWL_ERR(priv, "Unsupported interface type %d\n",
1099                         ctx->vif->type);
1100                 break;
1101         }
1102
1103 #if 0
1104         /* TODO:  Figure out when short_preamble would be set and cache from
1105          * that */
1106         if (!hw_to_local(priv->hw)->short_preamble)
1107                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1108         else
1109                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1110 #endif
1111
1112         ch_info = iwl_get_channel_info(priv, priv->band,
1113                                        le16_to_cpu(ctx->active.channel));
1114
1115         if (!ch_info)
1116                 ch_info = &priv->channel_info[0];
1117
1118         ctx->staging.channel = cpu_to_le16(ch_info->channel);
1119         priv->band = ch_info->band;
1120
1121         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
1122
1123         ctx->staging.ofdm_basic_rates =
1124             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1125         ctx->staging.cck_basic_rates =
1126             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1127
1128         /* clear both MIX and PURE40 mode flag */
1129         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1130                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1131         if (ctx->vif)
1132                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
1133
1134         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
1135         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
1136         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
1137 }
1138 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1139
1140 void iwl_set_rate(struct iwl_priv *priv)
1141 {
1142         const struct ieee80211_supported_band *hw = NULL;
1143         struct ieee80211_rate *rate;
1144         struct iwl_rxon_context *ctx;
1145         int i;
1146
1147         hw = iwl_get_hw_mode(priv, priv->band);
1148         if (!hw) {
1149                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1150                 return;
1151         }
1152
1153         priv->active_rate = 0;
1154
1155         for (i = 0; i < hw->n_bitrates; i++) {
1156                 rate = &(hw->bitrates[i]);
1157                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1158                         priv->active_rate |= (1 << rate->hw_value);
1159         }
1160
1161         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1162
1163         for_each_context(priv, ctx) {
1164                 ctx->staging.cck_basic_rates =
1165                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1166
1167                 ctx->staging.ofdm_basic_rates =
1168                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1169         }
1170 }
1171 EXPORT_SYMBOL(iwl_set_rate);
1172
1173 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1174 {
1175         /*
1176          * MULTI-FIXME
1177          * See iwl_mac_channel_switch.
1178          */
1179         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1180
1181         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1182                 return;
1183
1184         if (priv->switch_rxon.switch_in_progress) {
1185                 ieee80211_chswitch_done(ctx->vif, is_success);
1186                 mutex_lock(&priv->mutex);
1187                 priv->switch_rxon.switch_in_progress = false;
1188                 mutex_unlock(&priv->mutex);
1189         }
1190 }
1191 EXPORT_SYMBOL(iwl_chswitch_done);
1192
1193 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1194 {
1195         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1196         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1197         /*
1198          * MULTI-FIXME
1199          * See iwl_mac_channel_switch.
1200          */
1201         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1202         struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
1203
1204         if (priv->switch_rxon.switch_in_progress) {
1205                 if (!le32_to_cpu(csa->status) &&
1206                     (csa->channel == priv->switch_rxon.channel)) {
1207                         rxon->channel = csa->channel;
1208                         ctx->staging.channel = csa->channel;
1209                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1210                               le16_to_cpu(csa->channel));
1211                         iwl_chswitch_done(priv, true);
1212                 } else {
1213                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1214                               le16_to_cpu(csa->channel));
1215                         iwl_chswitch_done(priv, false);
1216                 }
1217         }
1218 }
1219 EXPORT_SYMBOL(iwl_rx_csa);
1220
1221 #ifdef CONFIG_IWLWIFI_DEBUG
1222 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
1223                              struct iwl_rxon_context *ctx)
1224 {
1225         struct iwl_rxon_cmd *rxon = &ctx->staging;
1226
1227         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1228         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1229         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1230         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1231         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1232                         le32_to_cpu(rxon->filter_flags));
1233         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1234         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1235                         rxon->ofdm_basic_rates);
1236         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1237         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1238         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1239         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1240 }
1241 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1242 #endif
1243 /**
1244  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1245  */
1246 void iwl_irq_handle_error(struct iwl_priv *priv)
1247 {
1248         /* Set the FW error flag -- cleared on iwl_down */
1249         set_bit(STATUS_FW_ERROR, &priv->status);
1250
1251         /* Cancel currently queued command. */
1252         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1253
1254         IWL_ERR(priv, "Loaded firmware version: %s\n",
1255                 priv->hw->wiphy->fw_version);
1256
1257         priv->cfg->ops->lib->dump_nic_error_log(priv);
1258         if (priv->cfg->ops->lib->dump_csr)
1259                 priv->cfg->ops->lib->dump_csr(priv);
1260         if (priv->cfg->ops->lib->dump_fh)
1261                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1262         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1263 #ifdef CONFIG_IWLWIFI_DEBUG
1264         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1265                 iwl_print_rx_config_cmd(priv,
1266                                         &priv->contexts[IWL_RXON_CTX_BSS]);
1267 #endif
1268
1269         wake_up_interruptible(&priv->wait_command_queue);
1270
1271         /* Keep the restart process from trying to send host
1272          * commands by clearing the INIT status bit */
1273         clear_bit(STATUS_READY, &priv->status);
1274
1275         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1276                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1277                           "Restarting adapter due to uCode error.\n");
1278
1279                 if (priv->cfg->mod_params->restart_fw)
1280                         queue_work(priv->workqueue, &priv->restart);
1281         }
1282 }
1283 EXPORT_SYMBOL(iwl_irq_handle_error);
1284
1285 static int iwl_apm_stop_master(struct iwl_priv *priv)
1286 {
1287         int ret = 0;
1288
1289         /* stop device's busmaster DMA activity */
1290         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1291
1292         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1293                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1294         if (ret)
1295                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1296
1297         IWL_DEBUG_INFO(priv, "stop master\n");
1298
1299         return ret;
1300 }
1301
1302 void iwl_apm_stop(struct iwl_priv *priv)
1303 {
1304         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1305
1306         /* Stop device's DMA activity */
1307         iwl_apm_stop_master(priv);
1308
1309         /* Reset the entire device */
1310         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1311
1312         udelay(10);
1313
1314         /*
1315          * Clear "initialization complete" bit to move adapter from
1316          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1317          */
1318         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1319 }
1320 EXPORT_SYMBOL(iwl_apm_stop);
1321
1322
1323 /*
1324  * Start up NIC's basic functionality after it has been reset
1325  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1326  * NOTE:  This does not load uCode nor start the embedded processor
1327  */
1328 int iwl_apm_init(struct iwl_priv *priv)
1329 {
1330         int ret = 0;
1331         u16 lctl;
1332
1333         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1334
1335         /*
1336          * Use "set_bit" below rather than "write", to preserve any hardware
1337          * bits already set by default after reset.
1338          */
1339
1340         /* Disable L0S exit timer (platform NMI Work/Around) */
1341         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1342                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1343
1344         /*
1345          * Disable L0s without affecting L1;
1346          *  don't wait for ICH L0s (ICH bug W/A)
1347          */
1348         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1349                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1350
1351         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1352         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1353
1354         /*
1355          * Enable HAP INTA (interrupt from management bus) to
1356          * wake device's PCI Express link L1a -> L0s
1357          * NOTE:  This is no-op for 3945 (non-existant bit)
1358          */
1359         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1360                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1361
1362         /*
1363          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1364          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1365          * If so (likely), disable L0S, so device moves directly L0->L1;
1366          *    costs negligible amount of power savings.
1367          * If not (unlikely), enable L0S, so there is at least some
1368          *    power savings, even without L1.
1369          */
1370         if (priv->cfg->base_params->set_l0s) {
1371                 lctl = iwl_pcie_link_ctl(priv);
1372                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1373                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1374                         /* L1-ASPM enabled; disable(!) L0S  */
1375                         iwl_set_bit(priv, CSR_GIO_REG,
1376                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1377                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1378                 } else {
1379                         /* L1-ASPM disabled; enable(!) L0S */
1380                         iwl_clear_bit(priv, CSR_GIO_REG,
1381                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1382                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1383                 }
1384         }
1385
1386         /* Configure analog phase-lock-loop before activating to D0A */
1387         if (priv->cfg->base_params->pll_cfg_val)
1388                 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1389                             priv->cfg->base_params->pll_cfg_val);
1390
1391         /*
1392          * Set "initialization complete" bit to move adapter from
1393          * D0U* --> D0A* (powered-up active) state.
1394          */
1395         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1396
1397         /*
1398          * Wait for clock stabilization; once stabilized, access to
1399          * device-internal resources is supported, e.g. iwl_write_prph()
1400          * and accesses to uCode SRAM.
1401          */
1402         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1403                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1404                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1405         if (ret < 0) {
1406                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1407                 goto out;
1408         }
1409
1410         /*
1411          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1412          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1413          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1414          * and don't need BSM to restore data after power-saving sleep.
1415          *
1416          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1417          * do not disable clocks.  This preserves any hardware bits already
1418          * set by default in "CLK_CTRL_REG" after reset.
1419          */
1420         if (priv->cfg->base_params->use_bsm)
1421                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1422                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1423         else
1424                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1425                         APMG_CLK_VAL_DMA_CLK_RQT);
1426         udelay(20);
1427
1428         /* Disable L1-Active */
1429         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1430                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1431
1432 out:
1433         return ret;
1434 }
1435 EXPORT_SYMBOL(iwl_apm_init);
1436
1437
1438 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1439 {
1440         int ret = 0;
1441         s8 prev_tx_power = priv->tx_power_user_lmt;
1442
1443         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1444                 IWL_WARN(priv,
1445                          "Requested user TXPOWER %d below lower limit %d.\n",
1446                          tx_power,
1447                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1448                 return -EINVAL;
1449         }
1450
1451         if (tx_power > priv->tx_power_device_lmt) {
1452                 IWL_WARN(priv,
1453                         "Requested user TXPOWER %d above upper limit %d.\n",
1454                          tx_power, priv->tx_power_device_lmt);
1455                 return -EINVAL;
1456         }
1457
1458         if (priv->tx_power_user_lmt != tx_power)
1459                 force = true;
1460
1461         /* if nic is not up don't send command */
1462         if (iwl_is_ready_rf(priv)) {
1463                 priv->tx_power_user_lmt = tx_power;
1464                 if (force && priv->cfg->ops->lib->send_tx_power)
1465                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1466                 else if (!priv->cfg->ops->lib->send_tx_power)
1467                         ret = -EOPNOTSUPP;
1468                 /*
1469                  * if fail to set tx_power, restore the orig. tx power
1470                  */
1471                 if (ret)
1472                         priv->tx_power_user_lmt = prev_tx_power;
1473         }
1474
1475         /*
1476          * Even this is an async host command, the command
1477          * will always report success from uCode
1478          * So once driver can placing the command into the queue
1479          * successfully, driver can use priv->tx_power_user_lmt
1480          * to reflect the current tx power
1481          */
1482         return ret;
1483 }
1484 EXPORT_SYMBOL(iwl_set_tx_power);
1485
1486 irqreturn_t iwl_isr_legacy(int irq, void *data)
1487 {
1488         struct iwl_priv *priv = data;
1489         u32 inta, inta_mask;
1490         u32 inta_fh;
1491         unsigned long flags;
1492         if (!priv)
1493                 return IRQ_NONE;
1494
1495         spin_lock_irqsave(&priv->lock, flags);
1496
1497         /* Disable (but don't clear!) interrupts here to avoid
1498          *    back-to-back ISRs and sporadic interrupts from our NIC.
1499          * If we have something to service, the tasklet will re-enable ints.
1500          * If we *don't* have something, we'll re-enable before leaving here. */
1501         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1502         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1503
1504         /* Discover which interrupts are active/pending */
1505         inta = iwl_read32(priv, CSR_INT);
1506         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1507
1508         /* Ignore interrupt if there's nothing in NIC to service.
1509          * This may be due to IRQ shared with another device,
1510          * or due to sporadic interrupts thrown from our NIC. */
1511         if (!inta && !inta_fh) {
1512                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1513                 goto none;
1514         }
1515
1516         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1517                 /* Hardware disappeared. It might have already raised
1518                  * an interrupt */
1519                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1520                 goto unplugged;
1521         }
1522
1523         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1524                       inta, inta_mask, inta_fh);
1525
1526         inta &= ~CSR_INT_BIT_SCD;
1527
1528         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1529         if (likely(inta || inta_fh))
1530                 tasklet_schedule(&priv->irq_tasklet);
1531
1532  unplugged:
1533         spin_unlock_irqrestore(&priv->lock, flags);
1534         return IRQ_HANDLED;
1535
1536  none:
1537         /* re-enable interrupts here since we don't have anything to service. */
1538         /* only Re-enable if diabled by irq */
1539         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1540                 iwl_enable_interrupts(priv);
1541         spin_unlock_irqrestore(&priv->lock, flags);
1542         return IRQ_NONE;
1543 }
1544 EXPORT_SYMBOL(iwl_isr_legacy);
1545
1546 void iwl_send_bt_config(struct iwl_priv *priv)
1547 {
1548         struct iwl_bt_cmd bt_cmd = {
1549                 .lead_time = BT_LEAD_TIME_DEF,
1550                 .max_kill = BT_MAX_KILL_DEF,
1551                 .kill_ack_mask = 0,
1552                 .kill_cts_mask = 0,
1553         };
1554
1555         if (!bt_coex_active)
1556                 bt_cmd.flags = BT_COEX_DISABLE;
1557         else
1558                 bt_cmd.flags = BT_COEX_ENABLE;
1559
1560         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1561                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1562
1563         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1564                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1565                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1566 }
1567 EXPORT_SYMBOL(iwl_send_bt_config);
1568
1569 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1570 {
1571         struct iwl_statistics_cmd statistics_cmd = {
1572                 .configuration_flags =
1573                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1574         };
1575
1576         if (flags & CMD_ASYNC)
1577                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1578                                                sizeof(struct iwl_statistics_cmd),
1579                                                &statistics_cmd, NULL);
1580         else
1581                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1582                                         sizeof(struct iwl_statistics_cmd),
1583                                         &statistics_cmd);
1584 }
1585 EXPORT_SYMBOL(iwl_send_statistics_request);
1586
1587 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1588                            struct iwl_rx_mem_buffer *rxb)
1589 {
1590 #ifdef CONFIG_IWLWIFI_DEBUG
1591         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1592         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1593         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1594                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1595 #endif
1596 }
1597 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1598
1599 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1600                                       struct iwl_rx_mem_buffer *rxb)
1601 {
1602         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1603         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1604         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1605                         "notification for %s:\n", len,
1606                         get_cmd_string(pkt->hdr.cmd));
1607         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1608 }
1609 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1610
1611 void iwl_rx_reply_error(struct iwl_priv *priv,
1612                         struct iwl_rx_mem_buffer *rxb)
1613 {
1614         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1615
1616         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1617                 "seq 0x%04X ser 0x%08X\n",
1618                 le32_to_cpu(pkt->u.err_resp.error_type),
1619                 get_cmd_string(pkt->u.err_resp.cmd_id),
1620                 pkt->u.err_resp.cmd_id,
1621                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1622                 le32_to_cpu(pkt->u.err_resp.error_info));
1623 }
1624 EXPORT_SYMBOL(iwl_rx_reply_error);
1625
1626 void iwl_clear_isr_stats(struct iwl_priv *priv)
1627 {
1628         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1629 }
1630
1631 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1632                            const struct ieee80211_tx_queue_params *params)
1633 {
1634         struct iwl_priv *priv = hw->priv;
1635         struct iwl_rxon_context *ctx;
1636         unsigned long flags;
1637         int q;
1638
1639         IWL_DEBUG_MAC80211(priv, "enter\n");
1640
1641         if (!iwl_is_ready_rf(priv)) {
1642                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1643                 return -EIO;
1644         }
1645
1646         if (queue >= AC_NUM) {
1647                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1648                 return 0;
1649         }
1650
1651         q = AC_NUM - 1 - queue;
1652
1653         spin_lock_irqsave(&priv->lock, flags);
1654
1655         /*
1656          * MULTI-FIXME
1657          * This may need to be done per interface in nl80211/cfg80211/mac80211.
1658          */
1659         for_each_context(priv, ctx) {
1660                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1661                         cpu_to_le16(params->cw_min);
1662                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1663                         cpu_to_le16(params->cw_max);
1664                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1665                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1666                                 cpu_to_le16((params->txop * 32));
1667
1668                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1669         }
1670
1671         spin_unlock_irqrestore(&priv->lock, flags);
1672
1673         IWL_DEBUG_MAC80211(priv, "leave\n");
1674         return 0;
1675 }
1676 EXPORT_SYMBOL(iwl_mac_conf_tx);
1677
1678 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1679 {
1680         struct iwl_priv *priv = hw->priv;
1681
1682         return priv->ibss_manager == IWL_IBSS_MANAGER;
1683 }
1684 EXPORT_SYMBOL_GPL(iwl_mac_tx_last_beacon);
1685
1686 static void iwl_ht_conf(struct iwl_priv *priv,
1687                         struct ieee80211_vif *vif)
1688 {
1689         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1690         struct ieee80211_sta *sta;
1691         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1692         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1693
1694         IWL_DEBUG_MAC80211(priv, "enter:\n");
1695
1696         if (!ctx->ht.enabled)
1697                 return;
1698
1699         ctx->ht.protection =
1700                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1701         ctx->ht.non_gf_sta_present =
1702                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1703
1704         ht_conf->single_chain_sufficient = false;
1705
1706         switch (vif->type) {
1707         case NL80211_IFTYPE_STATION:
1708                 rcu_read_lock();
1709                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1710                 if (sta) {
1711                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1712                         int maxstreams;
1713
1714                         maxstreams = (ht_cap->mcs.tx_params &
1715                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1716                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1717                         maxstreams += 1;
1718
1719                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1720                             (ht_cap->mcs.rx_mask[2] == 0))
1721                                 ht_conf->single_chain_sufficient = true;
1722                         if (maxstreams <= 1)
1723                                 ht_conf->single_chain_sufficient = true;
1724                 } else {
1725                         /*
1726                          * If at all, this can only happen through a race
1727                          * when the AP disconnects us while we're still
1728                          * setting up the connection, in that case mac80211
1729                          * will soon tell us about that.
1730                          */
1731                         ht_conf->single_chain_sufficient = true;
1732                 }
1733                 rcu_read_unlock();
1734                 break;
1735         case NL80211_IFTYPE_ADHOC:
1736                 ht_conf->single_chain_sufficient = true;
1737                 break;
1738         default:
1739                 break;
1740         }
1741
1742         IWL_DEBUG_MAC80211(priv, "leave\n");
1743 }
1744
1745 static inline void iwl_set_no_assoc(struct iwl_priv *priv,
1746                                     struct ieee80211_vif *vif)
1747 {
1748         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1749
1750         iwl_led_disassociate(priv);
1751         /*
1752          * inform the ucode that there is no longer an
1753          * association and that no more packets should be
1754          * sent
1755          */
1756         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1757         ctx->staging.assoc_id = 0;
1758         iwlcore_commit_rxon(priv, ctx);
1759 }
1760
1761 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1762 {
1763         struct iwl_priv *priv = hw->priv;
1764         unsigned long flags;
1765         __le64 timestamp;
1766
1767         IWL_DEBUG_MAC80211(priv, "enter\n");
1768
1769         lockdep_assert_held(&priv->mutex);
1770
1771         if (!priv->beacon_ctx) {
1772                 IWL_ERR(priv, "update beacon but no beacon context!\n");
1773                 dev_kfree_skb(skb);
1774                 return -EINVAL;
1775         }
1776
1777         if (!iwl_is_ready_rf(priv)) {
1778                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1779                 return -EIO;
1780         }
1781
1782         spin_lock_irqsave(&priv->lock, flags);
1783
1784         if (priv->ibss_beacon)
1785                 dev_kfree_skb(priv->ibss_beacon);
1786
1787         priv->ibss_beacon = skb;
1788
1789         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1790         priv->timestamp = le64_to_cpu(timestamp);
1791
1792         IWL_DEBUG_MAC80211(priv, "leave\n");
1793         spin_unlock_irqrestore(&priv->lock, flags);
1794
1795         priv->cfg->ops->lib->post_associate(priv, priv->beacon_ctx->vif);
1796
1797         return 0;
1798 }
1799
1800 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1801                           struct ieee80211_vif *vif,
1802                           struct ieee80211_bss_conf *bss_conf,
1803                           u32 changes)
1804 {
1805         struct iwl_priv *priv = hw->priv;
1806         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1807         int ret;
1808
1809         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1810
1811         if (!iwl_is_alive(priv))
1812                 return;
1813
1814         mutex_lock(&priv->mutex);
1815
1816         if (changes & BSS_CHANGED_QOS) {
1817                 unsigned long flags;
1818
1819                 spin_lock_irqsave(&priv->lock, flags);
1820                 ctx->qos_data.qos_active = bss_conf->qos;
1821                 iwl_update_qos(priv, ctx);
1822                 spin_unlock_irqrestore(&priv->lock, flags);
1823         }
1824
1825         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1826                 /*
1827                  * the add_interface code must make sure we only ever
1828                  * have a single interface that could be beaconing at
1829                  * any time.
1830                  */
1831                 if (vif->bss_conf.enable_beacon)
1832                         priv->beacon_ctx = ctx;
1833                 else
1834                         priv->beacon_ctx = NULL;
1835         }
1836
1837         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1838                 dev_kfree_skb(priv->ibss_beacon);
1839                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1840         }
1841
1842         if (changes & BSS_CHANGED_BEACON_INT && vif->type == NL80211_IFTYPE_AP)
1843                 iwl_send_rxon_timing(priv, ctx);
1844
1845         if (changes & BSS_CHANGED_BSSID) {
1846                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1847
1848                 /*
1849                  * If there is currently a HW scan going on in the
1850                  * background then we need to cancel it else the RXON
1851                  * below/in post_associate will fail.
1852                  */
1853                 if (iwl_scan_cancel_timeout(priv, 100)) {
1854                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1855                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1856                         mutex_unlock(&priv->mutex);
1857                         return;
1858                 }
1859
1860                 /* mac80211 only sets assoc when in STATION mode */
1861                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1862                         memcpy(ctx->staging.bssid_addr,
1863                                bss_conf->bssid, ETH_ALEN);
1864
1865                         /* currently needed in a few places */
1866                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1867                 } else {
1868                         ctx->staging.filter_flags &=
1869                                 ~RXON_FILTER_ASSOC_MSK;
1870                 }
1871
1872         }
1873
1874         /*
1875          * This needs to be after setting the BSSID in case
1876          * mac80211 decides to do both changes at once because
1877          * it will invoke post_associate.
1878          */
1879         if (vif->type == NL80211_IFTYPE_ADHOC &&
1880             changes & BSS_CHANGED_BEACON) {
1881                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1882
1883                 if (beacon)
1884                         iwl_mac_beacon_update(hw, beacon);
1885         }
1886
1887         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1888                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1889                                    bss_conf->use_short_preamble);
1890                 if (bss_conf->use_short_preamble)
1891                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1892                 else
1893                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1894         }
1895
1896         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1897                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1898                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1899                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1900                 else
1901                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1902                 if (bss_conf->use_cts_prot)
1903                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1904                 else
1905                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1906         }
1907
1908         if (changes & BSS_CHANGED_BASIC_RATES) {
1909                 /* XXX use this information
1910                  *
1911                  * To do that, remove code from iwl_set_rate() and put something
1912                  * like this here:
1913                  *
1914                 if (A-band)
1915                         ctx->staging.ofdm_basic_rates =
1916                                 bss_conf->basic_rates;
1917                 else
1918                         ctx->staging.ofdm_basic_rates =
1919                                 bss_conf->basic_rates >> 4;
1920                         ctx->staging.cck_basic_rates =
1921                                 bss_conf->basic_rates & 0xF;
1922                  */
1923         }
1924
1925         if (changes & BSS_CHANGED_HT) {
1926                 iwl_ht_conf(priv, vif);
1927
1928                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1929                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1930         }
1931
1932         if (changes & BSS_CHANGED_ASSOC) {
1933                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1934                 if (bss_conf->assoc) {
1935                         priv->timestamp = bss_conf->timestamp;
1936
1937                         iwl_led_associate(priv);
1938
1939                         if (!iwl_is_rfkill(priv))
1940                                 priv->cfg->ops->lib->post_associate(priv, vif);
1941                 } else
1942                         iwl_set_no_assoc(priv, vif);
1943         }
1944
1945         if (changes && iwl_is_associated_ctx(ctx) && bss_conf->aid) {
1946                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1947                                    changes);
1948                 ret = iwl_send_rxon_assoc(priv, ctx);
1949                 if (!ret) {
1950                         /* Sync active_rxon with latest change. */
1951                         memcpy((void *)&ctx->active,
1952                                 &ctx->staging,
1953                                 sizeof(struct iwl_rxon_cmd));
1954                 }
1955         }
1956
1957         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1958                 if (vif->bss_conf.enable_beacon) {
1959                         memcpy(ctx->staging.bssid_addr,
1960                                bss_conf->bssid, ETH_ALEN);
1961                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1962                         iwlcore_config_ap(priv, vif);
1963                 } else
1964                         iwl_set_no_assoc(priv, vif);
1965         }
1966
1967         if (changes & BSS_CHANGED_IBSS) {
1968                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1969                                                         bss_conf->ibss_joined);
1970                 if (ret)
1971                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1972                                 bss_conf->ibss_joined ? "add" : "remove",
1973                                 bss_conf->bssid);
1974         }
1975
1976         if (changes & BSS_CHANGED_IDLE &&
1977             priv->cfg->ops->hcmd->set_pan_params) {
1978                 if (priv->cfg->ops->hcmd->set_pan_params(priv))
1979                         IWL_ERR(priv, "failed to update PAN params\n");
1980         }
1981
1982         mutex_unlock(&priv->mutex);
1983
1984         IWL_DEBUG_MAC80211(priv, "leave\n");
1985 }
1986 EXPORT_SYMBOL(iwl_bss_info_changed);
1987
1988 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1989 {
1990         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1991
1992         iwl_connection_init_rx_config(priv, ctx);
1993
1994         if (priv->cfg->ops->hcmd->set_rxon_chain)
1995                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1996
1997         return iwlcore_commit_rxon(priv, ctx);
1998 }
1999
2000 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2001 {
2002         struct iwl_priv *priv = hw->priv;
2003         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2004         struct iwl_rxon_context *tmp, *ctx = NULL;
2005         int err = 0;
2006
2007         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
2008                            vif->type, vif->addr);
2009
2010         mutex_lock(&priv->mutex);
2011
2012         if (!iwl_is_ready_rf(priv)) {
2013                 IWL_WARN(priv, "Try to add interface when device not ready\n");
2014                 err = -EINVAL;
2015                 goto out;
2016         }
2017
2018         for_each_context(priv, tmp) {
2019                 u32 possible_modes =
2020                         tmp->interface_modes | tmp->exclusive_interface_modes;
2021
2022                 if (tmp->vif) {
2023                         /* check if this busy context is exclusive */
2024                         if (tmp->exclusive_interface_modes &
2025                                                 BIT(tmp->vif->type)) {
2026                                 err = -EINVAL;
2027                                 goto out;
2028                         }
2029                         continue;
2030                 }
2031
2032                 if (!(possible_modes & BIT(vif->type)))
2033                         continue;
2034
2035                 /* have maybe usable context w/o interface */
2036                 ctx = tmp;
2037                 break;
2038         }
2039
2040         if (!ctx) {
2041                 err = -EOPNOTSUPP;
2042                 goto out;
2043         }
2044
2045         vif_priv->ctx = ctx;
2046         ctx->vif = vif;
2047         /*
2048          * This variable will be correct only when there's just
2049          * a single context, but all code using it is for hardware
2050          * that supports only one context.
2051          */
2052         priv->iw_mode = vif->type;
2053
2054         ctx->is_active = true;
2055
2056         err = iwl_set_mode(priv, vif);
2057         if (err) {
2058                 if (!ctx->always_active)
2059                         ctx->is_active = false;
2060                 goto out_err;
2061         }
2062
2063         if (priv->cfg->bt_params &&
2064             priv->cfg->bt_params->advanced_bt_coexist &&
2065             vif->type == NL80211_IFTYPE_ADHOC) {
2066                 /*
2067                  * pretend to have high BT traffic as long as we
2068                  * are operating in IBSS mode, as this will cause
2069                  * the rate scaling etc. to behave as intended.
2070                  */
2071                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
2072         }
2073
2074         goto out;
2075
2076  out_err:
2077         ctx->vif = NULL;
2078         priv->iw_mode = NL80211_IFTYPE_STATION;
2079  out:
2080         mutex_unlock(&priv->mutex);
2081
2082         IWL_DEBUG_MAC80211(priv, "leave\n");
2083         return err;
2084 }
2085 EXPORT_SYMBOL(iwl_mac_add_interface);
2086
2087 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2088                               struct ieee80211_vif *vif)
2089 {
2090         struct iwl_priv *priv = hw->priv;
2091         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
2092
2093         IWL_DEBUG_MAC80211(priv, "enter\n");
2094
2095         mutex_lock(&priv->mutex);
2096
2097         WARN_ON(ctx->vif != vif);
2098         ctx->vif = NULL;
2099
2100         if (priv->scan_vif == vif) {
2101                 iwl_scan_cancel_timeout(priv, 200);
2102                 iwl_force_scan_end(priv);
2103         }
2104         iwl_set_mode(priv, vif);
2105
2106         if (!ctx->always_active)
2107                 ctx->is_active = false;
2108
2109         /*
2110          * When removing the IBSS interface, overwrite the
2111          * BT traffic load with the stored one from the last
2112          * notification, if any. If this is a device that
2113          * doesn't implement this, this has no effect since
2114          * both values are the same and zero.
2115          */
2116         if (vif->type == NL80211_IFTYPE_ADHOC)
2117                 priv->bt_traffic_load = priv->notif_bt_traffic_load;
2118
2119         memset(priv->bssid, 0, ETH_ALEN);
2120         mutex_unlock(&priv->mutex);
2121
2122         IWL_DEBUG_MAC80211(priv, "leave\n");
2123
2124 }
2125 EXPORT_SYMBOL(iwl_mac_remove_interface);
2126
2127 /**
2128  * iwl_mac_config - mac80211 config callback
2129  */
2130 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2131 {
2132         struct iwl_priv *priv = hw->priv;
2133         const struct iwl_channel_info *ch_info;
2134         struct ieee80211_conf *conf = &hw->conf;
2135         struct ieee80211_channel *channel = conf->channel;
2136         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2137         struct iwl_rxon_context *ctx;
2138         unsigned long flags = 0;
2139         int ret = 0;
2140         u16 ch;
2141         int scan_active = 0;
2142
2143         mutex_lock(&priv->mutex);
2144
2145         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2146                                         channel->hw_value, changed);
2147
2148         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2149                         test_bit(STATUS_SCANNING, &priv->status))) {
2150                 scan_active = 1;
2151                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2152         }
2153
2154         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2155                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2156                 /* mac80211 uses static for non-HT which is what we want */
2157                 priv->current_ht_config.smps = conf->smps_mode;
2158
2159                 /*
2160                  * Recalculate chain counts.
2161                  *
2162                  * If monitor mode is enabled then mac80211 will
2163                  * set up the SM PS mode to OFF if an HT channel is
2164                  * configured.
2165                  */
2166                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2167                         for_each_context(priv, ctx)
2168                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2169         }
2170
2171         /* during scanning mac80211 will delay channel setting until
2172          * scan finish with changed = 0
2173          */
2174         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2175                 if (scan_active)
2176                         goto set_ch_out;
2177
2178                 ch = channel->hw_value;
2179                 ch_info = iwl_get_channel_info(priv, channel->band, ch);
2180                 if (!is_channel_valid(ch_info)) {
2181                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2182                         ret = -EINVAL;
2183                         goto set_ch_out;
2184                 }
2185
2186                 spin_lock_irqsave(&priv->lock, flags);
2187
2188                 for_each_context(priv, ctx) {
2189                         /* Configure HT40 channels */
2190                         ctx->ht.enabled = conf_is_ht(conf);
2191                         if (ctx->ht.enabled) {
2192                                 if (conf_is_ht40_minus(conf)) {
2193                                         ctx->ht.extension_chan_offset =
2194                                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2195                                         ctx->ht.is_40mhz = true;
2196                                 } else if (conf_is_ht40_plus(conf)) {
2197                                         ctx->ht.extension_chan_offset =
2198                                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2199                                         ctx->ht.is_40mhz = true;
2200                                 } else {
2201                                         ctx->ht.extension_chan_offset =
2202                                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2203                                         ctx->ht.is_40mhz = false;
2204                                 }
2205                         } else
2206                                 ctx->ht.is_40mhz = false;
2207
2208                         /*
2209                          * Default to no protection. Protection mode will
2210                          * later be set from BSS config in iwl_ht_conf
2211                          */
2212                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2213
2214                         /* if we are switching from ht to 2.4 clear flags
2215                          * from any ht related info since 2.4 does not
2216                          * support ht */
2217                         if ((le16_to_cpu(ctx->staging.channel) != ch))
2218                                 ctx->staging.flags = 0;
2219
2220                         iwl_set_rxon_channel(priv, channel, ctx);
2221                         iwl_set_rxon_ht(priv, ht_conf);
2222
2223                         iwl_set_flags_for_band(priv, ctx, channel->band,
2224                                                ctx->vif);
2225                 }
2226
2227                 spin_unlock_irqrestore(&priv->lock, flags);
2228
2229                 if (priv->cfg->ops->lib->update_bcast_stations)
2230                         ret = priv->cfg->ops->lib->update_bcast_stations(priv);
2231
2232  set_ch_out:
2233                 /* The list of supported rates and rate mask can be different
2234                  * for each band; since the band may have changed, reset
2235                  * the rate mask to what mac80211 lists */
2236                 iwl_set_rate(priv);
2237         }
2238
2239         if (changed & (IEEE80211_CONF_CHANGE_PS |
2240                         IEEE80211_CONF_CHANGE_IDLE)) {
2241                 ret = iwl_power_update_mode(priv, false);
2242                 if (ret)
2243                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2244         }
2245
2246         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2247                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2248                         priv->tx_power_user_lmt, conf->power_level);
2249
2250                 iwl_set_tx_power(priv, conf->power_level, false);
2251         }
2252
2253         if (!iwl_is_ready(priv)) {
2254                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2255                 goto out;
2256         }
2257
2258         if (scan_active)
2259                 goto out;
2260
2261         for_each_context(priv, ctx) {
2262                 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2263                         iwlcore_commit_rxon(priv, ctx);
2264                 else
2265                         IWL_DEBUG_INFO(priv,
2266                                 "Not re-sending same RXON configuration.\n");
2267         }
2268
2269 out:
2270         IWL_DEBUG_MAC80211(priv, "leave\n");
2271         mutex_unlock(&priv->mutex);
2272         return ret;
2273 }
2274 EXPORT_SYMBOL(iwl_mac_config);
2275
2276 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2277 {
2278         struct iwl_priv *priv = hw->priv;
2279         unsigned long flags;
2280         /* IBSS can only be the IWL_RXON_CTX_BSS context */
2281         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2282
2283         mutex_lock(&priv->mutex);
2284         IWL_DEBUG_MAC80211(priv, "enter\n");
2285
2286         spin_lock_irqsave(&priv->lock, flags);
2287         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2288         spin_unlock_irqrestore(&priv->lock, flags);
2289
2290         spin_lock_irqsave(&priv->lock, flags);
2291
2292         /* new association get rid of ibss beacon skb */
2293         if (priv->ibss_beacon)
2294                 dev_kfree_skb(priv->ibss_beacon);
2295
2296         priv->ibss_beacon = NULL;
2297
2298         priv->timestamp = 0;
2299
2300         spin_unlock_irqrestore(&priv->lock, flags);
2301
2302         iwl_scan_cancel_timeout(priv, 100);
2303         if (!iwl_is_ready_rf(priv)) {
2304                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2305                 mutex_unlock(&priv->mutex);
2306                 return;
2307         }
2308
2309         /* we are restarting association process
2310          * clear RXON_FILTER_ASSOC_MSK bit
2311          */
2312         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2313         iwlcore_commit_rxon(priv, ctx);
2314
2315         iwl_set_rate(priv);
2316
2317         mutex_unlock(&priv->mutex);
2318
2319         IWL_DEBUG_MAC80211(priv, "leave\n");
2320 }
2321 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2322
2323 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2324 {
2325         if (!priv->txq)
2326                 priv->txq = kzalloc(
2327                         sizeof(struct iwl_tx_queue) *
2328                                 priv->cfg->base_params->num_of_queues,
2329                         GFP_KERNEL);
2330         if (!priv->txq) {
2331                 IWL_ERR(priv, "Not enough memory for txq\n");
2332                 return -ENOMEM;
2333         }
2334         return 0;
2335 }
2336 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2337
2338 void iwl_free_txq_mem(struct iwl_priv *priv)
2339 {
2340         kfree(priv->txq);
2341         priv->txq = NULL;
2342 }
2343 EXPORT_SYMBOL(iwl_free_txq_mem);
2344
2345 #ifdef CONFIG_IWLWIFI_DEBUGFS
2346
2347 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2348
2349 void iwl_reset_traffic_log(struct iwl_priv *priv)
2350 {
2351         priv->tx_traffic_idx = 0;
2352         priv->rx_traffic_idx = 0;
2353         if (priv->tx_traffic)
2354                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2355         if (priv->rx_traffic)
2356                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2357 }
2358
2359 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2360 {
2361         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2362
2363         if (iwl_debug_level & IWL_DL_TX) {
2364                 if (!priv->tx_traffic) {
2365                         priv->tx_traffic =
2366                                 kzalloc(traffic_size, GFP_KERNEL);
2367                         if (!priv->tx_traffic)
2368                                 return -ENOMEM;
2369                 }
2370         }
2371         if (iwl_debug_level & IWL_DL_RX) {
2372                 if (!priv->rx_traffic) {
2373                         priv->rx_traffic =
2374                                 kzalloc(traffic_size, GFP_KERNEL);
2375                         if (!priv->rx_traffic)
2376                                 return -ENOMEM;
2377                 }
2378         }
2379         iwl_reset_traffic_log(priv);
2380         return 0;
2381 }
2382 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2383
2384 void iwl_free_traffic_mem(struct iwl_priv *priv)
2385 {
2386         kfree(priv->tx_traffic);
2387         priv->tx_traffic = NULL;
2388
2389         kfree(priv->rx_traffic);
2390         priv->rx_traffic = NULL;
2391 }
2392 EXPORT_SYMBOL(iwl_free_traffic_mem);
2393
2394 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2395                       u16 length, struct ieee80211_hdr *header)
2396 {
2397         __le16 fc;
2398         u16 len;
2399
2400         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2401                 return;
2402
2403         if (!priv->tx_traffic)
2404                 return;
2405
2406         fc = header->frame_control;
2407         if (ieee80211_is_data(fc)) {
2408                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2409                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2410                 memcpy((priv->tx_traffic +
2411                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2412                        header, len);
2413                 priv->tx_traffic_idx =
2414                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2415         }
2416 }
2417 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2418
2419 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2420                       u16 length, struct ieee80211_hdr *header)
2421 {
2422         __le16 fc;
2423         u16 len;
2424
2425         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2426                 return;
2427
2428         if (!priv->rx_traffic)
2429                 return;
2430
2431         fc = header->frame_control;
2432         if (ieee80211_is_data(fc)) {
2433                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2434                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2435                 memcpy((priv->rx_traffic +
2436                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2437                        header, len);
2438                 priv->rx_traffic_idx =
2439                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2440         }
2441 }
2442 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2443
2444 const char *get_mgmt_string(int cmd)
2445 {
2446         switch (cmd) {
2447                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2448                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2449                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2450                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2451                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2452                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2453                 IWL_CMD(MANAGEMENT_BEACON);
2454                 IWL_CMD(MANAGEMENT_ATIM);
2455                 IWL_CMD(MANAGEMENT_DISASSOC);
2456                 IWL_CMD(MANAGEMENT_AUTH);
2457                 IWL_CMD(MANAGEMENT_DEAUTH);
2458                 IWL_CMD(MANAGEMENT_ACTION);
2459         default:
2460                 return "UNKNOWN";
2461
2462         }
2463 }
2464
2465 const char *get_ctrl_string(int cmd)
2466 {
2467         switch (cmd) {
2468                 IWL_CMD(CONTROL_BACK_REQ);
2469                 IWL_CMD(CONTROL_BACK);
2470                 IWL_CMD(CONTROL_PSPOLL);
2471                 IWL_CMD(CONTROL_RTS);
2472                 IWL_CMD(CONTROL_CTS);
2473                 IWL_CMD(CONTROL_ACK);
2474                 IWL_CMD(CONTROL_CFEND);
2475                 IWL_CMD(CONTROL_CFENDACK);
2476         default:
2477                 return "UNKNOWN";
2478
2479         }
2480 }
2481
2482 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2483 {
2484         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2485         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2486         priv->led_tpt = 0;
2487 }
2488
2489 /*
2490  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2491  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2492  * Use debugFs to display the rx/rx_statistics
2493  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2494  * information will be recorded, but DATA pkt still will be recorded
2495  * for the reason of iwl_led.c need to control the led blinking based on
2496  * number of tx and rx data.
2497  *
2498  */
2499 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2500 {
2501         struct traffic_stats    *stats;
2502
2503         if (is_tx)
2504                 stats = &priv->tx_stats;
2505         else
2506                 stats = &priv->rx_stats;
2507
2508         if (ieee80211_is_mgmt(fc)) {
2509                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2510                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2511                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2512                         break;
2513                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2514                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2515                         break;
2516                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2517                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2518                         break;
2519                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2520                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2521                         break;
2522                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2523                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2524                         break;
2525                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2526                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2527                         break;
2528                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2529                         stats->mgmt[MANAGEMENT_BEACON]++;
2530                         break;
2531                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2532                         stats->mgmt[MANAGEMENT_ATIM]++;
2533                         break;
2534                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2535                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2536                         break;
2537                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2538                         stats->mgmt[MANAGEMENT_AUTH]++;
2539                         break;
2540                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2541                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2542                         break;
2543                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2544                         stats->mgmt[MANAGEMENT_ACTION]++;
2545                         break;
2546                 }
2547         } else if (ieee80211_is_ctl(fc)) {
2548                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2549                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2550                         stats->ctrl[CONTROL_BACK_REQ]++;
2551                         break;
2552                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2553                         stats->ctrl[CONTROL_BACK]++;
2554                         break;
2555                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2556                         stats->ctrl[CONTROL_PSPOLL]++;
2557                         break;
2558                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2559                         stats->ctrl[CONTROL_RTS]++;
2560                         break;
2561                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2562                         stats->ctrl[CONTROL_CTS]++;
2563                         break;
2564                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2565                         stats->ctrl[CONTROL_ACK]++;
2566                         break;
2567                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2568                         stats->ctrl[CONTROL_CFEND]++;
2569                         break;
2570                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2571                         stats->ctrl[CONTROL_CFENDACK]++;
2572                         break;
2573                 }
2574         } else {
2575                 /* data */
2576                 stats->data_cnt++;
2577                 stats->data_bytes += len;
2578         }
2579         iwl_leds_background(priv);
2580 }
2581 EXPORT_SYMBOL(iwl_update_stats);
2582 #endif
2583
2584 static const char *get_csr_string(int cmd)
2585 {
2586         switch (cmd) {
2587                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2588                 IWL_CMD(CSR_INT_COALESCING);
2589                 IWL_CMD(CSR_INT);
2590                 IWL_CMD(CSR_INT_MASK);
2591                 IWL_CMD(CSR_FH_INT_STATUS);
2592                 IWL_CMD(CSR_GPIO_IN);
2593                 IWL_CMD(CSR_RESET);
2594                 IWL_CMD(CSR_GP_CNTRL);
2595                 IWL_CMD(CSR_HW_REV);
2596                 IWL_CMD(CSR_EEPROM_REG);
2597                 IWL_CMD(CSR_EEPROM_GP);
2598                 IWL_CMD(CSR_OTP_GP_REG);
2599                 IWL_CMD(CSR_GIO_REG);
2600                 IWL_CMD(CSR_GP_UCODE_REG);
2601                 IWL_CMD(CSR_GP_DRIVER_REG);
2602                 IWL_CMD(CSR_UCODE_DRV_GP1);
2603                 IWL_CMD(CSR_UCODE_DRV_GP2);
2604                 IWL_CMD(CSR_LED_REG);
2605                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2606                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2607                 IWL_CMD(CSR_ANA_PLL_CFG);
2608                 IWL_CMD(CSR_HW_REV_WA_REG);
2609                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2610         default:
2611                 return "UNKNOWN";
2612
2613         }
2614 }
2615
2616 void iwl_dump_csr(struct iwl_priv *priv)
2617 {
2618         int i;
2619         u32 csr_tbl[] = {
2620                 CSR_HW_IF_CONFIG_REG,
2621                 CSR_INT_COALESCING,
2622                 CSR_INT,
2623                 CSR_INT_MASK,
2624                 CSR_FH_INT_STATUS,
2625                 CSR_GPIO_IN,
2626                 CSR_RESET,
2627                 CSR_GP_CNTRL,
2628                 CSR_HW_REV,
2629                 CSR_EEPROM_REG,
2630                 CSR_EEPROM_GP,
2631                 CSR_OTP_GP_REG,
2632                 CSR_GIO_REG,
2633                 CSR_GP_UCODE_REG,
2634                 CSR_GP_DRIVER_REG,
2635                 CSR_UCODE_DRV_GP1,
2636                 CSR_UCODE_DRV_GP2,
2637                 CSR_LED_REG,
2638                 CSR_DRAM_INT_TBL_REG,
2639                 CSR_GIO_CHICKEN_BITS,
2640                 CSR_ANA_PLL_CFG,
2641                 CSR_HW_REV_WA_REG,
2642                 CSR_DBG_HPET_MEM_REG
2643         };
2644         IWL_ERR(priv, "CSR values:\n");
2645         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2646                 "CSR_INT_PERIODIC_REG)\n");
2647         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2648                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2649                         get_csr_string(csr_tbl[i]),
2650                         iwl_read32(priv, csr_tbl[i]));
2651         }
2652 }
2653 EXPORT_SYMBOL(iwl_dump_csr);
2654
2655 static const char *get_fh_string(int cmd)
2656 {
2657         switch (cmd) {
2658                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2659                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2660                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2661                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2662                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2663                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2664                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2665                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2666                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2667         default:
2668                 return "UNKNOWN";
2669
2670         }
2671 }
2672
2673 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2674 {
2675         int i;
2676 #ifdef CONFIG_IWLWIFI_DEBUG
2677         int pos = 0;
2678         size_t bufsz = 0;
2679 #endif
2680         u32 fh_tbl[] = {
2681                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2682                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2683                 FH_RSCSR_CHNL0_WPTR,
2684                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2685                 FH_MEM_RSSR_SHARED_CTRL_REG,
2686                 FH_MEM_RSSR_RX_STATUS_REG,
2687                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2688                 FH_TSSR_TX_STATUS_REG,
2689                 FH_TSSR_TX_ERROR_REG
2690         };
2691 #ifdef CONFIG_IWLWIFI_DEBUG
2692         if (display) {
2693                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2694                 *buf = kmalloc(bufsz, GFP_KERNEL);
2695                 if (!*buf)
2696                         return -ENOMEM;
2697                 pos += scnprintf(*buf + pos, bufsz - pos,
2698                                 "FH register values:\n");
2699                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2700                         pos += scnprintf(*buf + pos, bufsz - pos,
2701                                 "  %34s: 0X%08x\n",
2702                                 get_fh_string(fh_tbl[i]),
2703                                 iwl_read_direct32(priv, fh_tbl[i]));
2704                 }
2705                 return pos;
2706         }
2707 #endif
2708         IWL_ERR(priv, "FH register values:\n");
2709         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2710                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2711                         get_fh_string(fh_tbl[i]),
2712                         iwl_read_direct32(priv, fh_tbl[i]));
2713         }
2714         return 0;
2715 }
2716 EXPORT_SYMBOL(iwl_dump_fh);
2717
2718 static void iwl_force_rf_reset(struct iwl_priv *priv)
2719 {
2720         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2721                 return;
2722
2723         if (!iwl_is_any_associated(priv)) {
2724                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2725                 return;
2726         }
2727         /*
2728          * There is no easy and better way to force reset the radio,
2729          * the only known method is switching channel which will force to
2730          * reset and tune the radio.
2731          * Use internal short scan (single channel) operation to should
2732          * achieve this objective.
2733          * Driver should reset the radio when number of consecutive missed
2734          * beacon, or any other uCode error condition detected.
2735          */
2736         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2737         iwl_internal_short_hw_scan(priv);
2738 }
2739
2740
2741 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
2742 {
2743         struct iwl_force_reset *force_reset;
2744
2745         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2746                 return -EINVAL;
2747
2748         if (test_bit(STATUS_SCANNING, &priv->status)) {
2749                 IWL_DEBUG_INFO(priv, "scan in progress.\n");
2750                 return -EINVAL;
2751         }
2752
2753         if (mode >= IWL_MAX_FORCE_RESET) {
2754                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2755                 return -EINVAL;
2756         }
2757         force_reset = &priv->force_reset[mode];
2758         force_reset->reset_request_count++;
2759         if (!external) {
2760                 if (force_reset->last_force_reset_jiffies &&
2761                     time_after(force_reset->last_force_reset_jiffies +
2762                     force_reset->reset_duration, jiffies)) {
2763                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
2764                         force_reset->reset_reject_count++;
2765                         return -EAGAIN;
2766                 }
2767         }
2768         force_reset->reset_success_count++;
2769         force_reset->last_force_reset_jiffies = jiffies;
2770         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2771         switch (mode) {
2772         case IWL_RF_RESET:
2773                 iwl_force_rf_reset(priv);
2774                 break;
2775         case IWL_FW_RESET:
2776                 /*
2777                  * if the request is from external(ex: debugfs),
2778                  * then always perform the request in regardless the module
2779                  * parameter setting
2780                  * if the request is from internal (uCode error or driver
2781                  * detect failure), then fw_restart module parameter
2782                  * need to be check before performing firmware reload
2783                  */
2784                 if (!external && !priv->cfg->mod_params->restart_fw) {
2785                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
2786                                        "module parameter setting\n");
2787                         break;
2788                 }
2789                 IWL_ERR(priv, "On demand firmware reload\n");
2790                 /* Set the FW error flag -- cleared on iwl_down */
2791                 set_bit(STATUS_FW_ERROR, &priv->status);
2792                 wake_up_interruptible(&priv->wait_command_queue);
2793                 /*
2794                  * Keep the restart process from trying to send host
2795                  * commands by clearing the INIT status bit
2796                  */
2797                 clear_bit(STATUS_READY, &priv->status);
2798                 queue_work(priv->workqueue, &priv->restart);
2799                 break;
2800         }
2801         return 0;
2802 }
2803 EXPORT_SYMBOL(iwl_force_reset);
2804
2805 /**
2806  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2807  *
2808  * During normal condition (no queue is stuck), the timer is continually set to
2809  * execute every monitor_recover_period milliseconds after the last timer
2810  * expired.  When the queue read_ptr is at the same place, the timer is
2811  * shorten to 100mSecs.  This is
2812  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2813  *      2) to detect the stuck queues quicker before the station and AP can
2814  *      disassociate each other.
2815  *
2816  * This function monitors all the tx queues and recover from it if any
2817  * of the queues are stuck.
2818  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2819  *      it will recover by resetting the firmware and return.
2820  * 2. Then, it checks for station association.  If it associates it will check
2821  *      other queues.  If any queue is stuck, it will recover by resetting
2822  *      the firmware.
2823  * Note: It the number of times the queue read_ptr to be at the same place to
2824  *      be MAX_REPEAT+1 in order to consider to be stuck.
2825  */
2826 /*
2827  * The maximum number of times the read pointer of the tx queue at the
2828  * same place without considering to be stuck.
2829  */
2830 #define MAX_REPEAT      (2)
2831 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2832 {
2833         struct iwl_tx_queue *txq;
2834         struct iwl_queue *q;
2835
2836         txq = &priv->txq[cnt];
2837         q = &txq->q;
2838         /* queue is empty, skip */
2839         if (q->read_ptr == q->write_ptr)
2840                 return 0;
2841
2842         if (q->read_ptr == q->last_read_ptr) {
2843                 /* a queue has not been read from last time */
2844                 if (q->repeat_same_read_ptr > MAX_REPEAT) {
2845                         IWL_ERR(priv,
2846                                 "queue %d stuck %d time. Fw reload.\n",
2847                                 q->id, q->repeat_same_read_ptr);
2848                         q->repeat_same_read_ptr = 0;
2849                         iwl_force_reset(priv, IWL_FW_RESET, false);
2850                 } else {
2851                         q->repeat_same_read_ptr++;
2852                         IWL_DEBUG_RADIO(priv,
2853                                         "queue %d, not read %d time\n",
2854                                         q->id,
2855                                         q->repeat_same_read_ptr);
2856                         if (priv->cfg->bt_params &&
2857                             !priv->cfg->bt_params->advanced_bt_coexist) {
2858                                 mod_timer(&priv->monitor_recover,
2859                                         jiffies + msecs_to_jiffies(
2860                                         IWL_ONE_HUNDRED_MSECS));
2861                                 return 1;
2862                         }
2863                 }
2864         } else {
2865                 q->last_read_ptr = q->read_ptr;
2866                 q->repeat_same_read_ptr = 0;
2867         }
2868         return 0;
2869 }
2870
2871 void iwl_bg_monitor_recover(unsigned long data)
2872 {
2873         struct iwl_priv *priv = (struct iwl_priv *)data;
2874         int cnt;
2875
2876         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2877                 return;
2878
2879         /* monitor and check for stuck cmd queue */
2880         if (iwl_check_stuck_queue(priv, priv->cmd_queue))
2881                 return;
2882
2883         /* monitor and check for other stuck queues */
2884         if (iwl_is_any_associated(priv)) {
2885                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2886                         /* skip as we already checked the command queue */
2887                         if (cnt == priv->cmd_queue)
2888                                 continue;
2889                         if (iwl_check_stuck_queue(priv, cnt))
2890                                 return;
2891                 }
2892         }
2893         if (priv->cfg->base_params->monitor_recover_period) {
2894                 /*
2895                  * Reschedule the timer to occur in
2896                  * priv->cfg->base_params->monitor_recover_period
2897                  */
2898                 mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(
2899                           priv->cfg->base_params->monitor_recover_period));
2900         }
2901 }
2902 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2903
2904
2905 /*
2906  * extended beacon time format
2907  * time in usec will be changed into a 32-bit value in extended:internal format
2908  * the extended part is the beacon counts
2909  * the internal part is the time in usec within one beacon interval
2910  */
2911 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2912 {
2913         u32 quot;
2914         u32 rem;
2915         u32 interval = beacon_interval * TIME_UNIT;
2916
2917         if (!interval || !usec)
2918                 return 0;
2919
2920         quot = (usec / interval) &
2921                 (iwl_beacon_time_mask_high(priv,
2922                 priv->hw_params.beacon_time_tsf_bits) >>
2923                 priv->hw_params.beacon_time_tsf_bits);
2924         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2925                                    priv->hw_params.beacon_time_tsf_bits);
2926
2927         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2928 }
2929 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2930
2931 /* base is usually what we get from ucode with each received frame,
2932  * the same as HW timer counter counting down
2933  */
2934 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2935                            u32 addon, u32 beacon_interval)
2936 {
2937         u32 base_low = base & iwl_beacon_time_mask_low(priv,
2938                                         priv->hw_params.beacon_time_tsf_bits);
2939         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2940                                         priv->hw_params.beacon_time_tsf_bits);
2941         u32 interval = beacon_interval * TIME_UNIT;
2942         u32 res = (base & iwl_beacon_time_mask_high(priv,
2943                                 priv->hw_params.beacon_time_tsf_bits)) +
2944                                 (addon & iwl_beacon_time_mask_high(priv,
2945                                 priv->hw_params.beacon_time_tsf_bits));
2946
2947         if (base_low > addon_low)
2948                 res += base_low - addon_low;
2949         else if (base_low < addon_low) {
2950                 res += interval + base_low - addon_low;
2951                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2952         } else
2953                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2954
2955         return cpu_to_le32(res);
2956 }
2957 EXPORT_SYMBOL(iwl_add_beacon_time);
2958
2959 #ifdef CONFIG_PM
2960
2961 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2962 {
2963         struct iwl_priv *priv = pci_get_drvdata(pdev);
2964
2965         /*
2966          * This function is called when system goes into suspend state
2967          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2968          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2969          * it will not call apm_ops.stop() to stop the DMA operation.
2970          * Calling apm_ops.stop here to make sure we stop the DMA.
2971          */
2972         priv->cfg->ops->lib->apm_ops.stop(priv);
2973
2974         pci_save_state(pdev);
2975         pci_disable_device(pdev);
2976         pci_set_power_state(pdev, PCI_D3hot);
2977
2978         return 0;
2979 }
2980 EXPORT_SYMBOL(iwl_pci_suspend);
2981
2982 int iwl_pci_resume(struct pci_dev *pdev)
2983 {
2984         struct iwl_priv *priv = pci_get_drvdata(pdev);
2985         int ret;
2986         bool hw_rfkill = false;
2987
2988         /*
2989          * We disable the RETRY_TIMEOUT register (0x41) to keep
2990          * PCI Tx retries from interfering with C3 CPU state.
2991          */
2992         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2993
2994         pci_set_power_state(pdev, PCI_D0);
2995         ret = pci_enable_device(pdev);
2996         if (ret)
2997                 return ret;
2998         pci_restore_state(pdev);
2999         iwl_enable_interrupts(priv);
3000
3001         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
3002                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
3003                 hw_rfkill = true;
3004
3005         if (hw_rfkill)
3006                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3007         else
3008                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3009
3010         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
3011
3012         return 0;
3013 }
3014 EXPORT_SYMBOL(iwl_pci_resume);
3015
3016 #endif /* CONFIG_PM */