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