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         ctx->qos_data.def_qos_parm.qos_flags = 0;
 200
 201         if (ctx->qos_data.qos_active)
 202                 ctx->qos_data.def_qos_parm.qos_flags |=
 203                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 204
 205         if (priv->current_ht_config.is_ht)
 206                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 207
 208         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 209                       ctx->qos_data.qos_active,
 210                       ctx->qos_data.def_qos_parm.qos_flags);
 211
 212         iwl_send_cmd_pdu_async(priv, ctx->qos_cmd,
 213                                sizeof(struct iwl_qosparam_cmd),
 214                                &ctx->qos_data.def_qos_parm, NULL);
 215 }
 216
 217 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 218 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 219 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 220                               struct ieee80211_sta_ht_cap *ht_info,
 221                               enum ieee80211_band band)
 222 {
 223         u16 max_bit_rate = 0;
 224         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 225         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 226
 227         ht_info->cap = 0;
 228         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 229
 230         ht_info->ht_supported = true;
 231
 232         if (priv->cfg->ht_greenfield_support)
 233                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 234         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 235         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 236         if (priv->hw_params.ht40_channel & BIT(band)) {
 237                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 238                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 239                 ht_info->mcs.rx_mask[4] = 0x01;
 240                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 241         }
 242
 243         if (priv->cfg->mod_params->amsdu_size_8K)
 244                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 245
 246         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 247         if (priv->cfg->ampdu_factor)
 248                 ht_info->ampdu_factor = priv->cfg->ampdu_factor;
 249         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 250         if (priv->cfg->ampdu_density)
 251                 ht_info->ampdu_density = priv->cfg->ampdu_density;
 252
 253         ht_info->mcs.rx_mask[0] = 0xFF;
 254         if (rx_chains_num >= 2)
 255                 ht_info->mcs.rx_mask[1] = 0xFF;
 256         if (rx_chains_num >= 3)
 257                 ht_info->mcs.rx_mask[2] = 0xFF;
 258
 259         /* Highest supported Rx data rate */
 260         max_bit_rate *= rx_chains_num;
 261         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 262         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 263
 264         /* Tx MCS capabilities */
 265         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 266         if (tx_chains_num != rx_chains_num) {
 267                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 268                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 269                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 270         }
 271 }
 272
 273 /**
 274  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 275  */
 276 int iwlcore_init_geos(struct iwl_priv *priv)
 277 {
 278         struct iwl_channel_info *ch;
 279         struct ieee80211_supported_band *sband;
 280         struct ieee80211_channel *channels;
 281         struct ieee80211_channel *geo_ch;
 282         struct ieee80211_rate *rates;
 283         int i = 0;
 284
 285         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 286             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 287                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 288                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 289                 return 0;
 290         }
 291
 292         channels = kzalloc(sizeof(struct ieee80211_channel) *
 293                            priv->channel_count, GFP_KERNEL);
 294         if (!channels)
 295                 return -ENOMEM;
 296
 297         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 298                         GFP_KERNEL);
 299         if (!rates) {
 300                 kfree(channels);
 301                 return -ENOMEM;
 302         }
 303
 304         /* 5.2GHz channels start after the 2.4GHz channels */
 305         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 306         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 307         /* just OFDM */
 308         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 309         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 310
 311         if (priv->cfg->sku & IWL_SKU_N)
 312                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 313                                          IEEE80211_BAND_5GHZ);
 314
 315         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 316         sband->channels = channels;
 317         /* OFDM & CCK */
 318         sband->bitrates = rates;
 319         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 320
 321         if (priv->cfg->sku & IWL_SKU_N)
 322                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 323                                          IEEE80211_BAND_2GHZ);
 324
 325         priv->ieee_channels = channels;
 326         priv->ieee_rates = rates;
 327
 328         for (i = 0;  i < priv->channel_count; i++) {
 329                 ch = &priv->channel_info[i];
 330
 331                 /* FIXME: might be removed if scan is OK */
 332                 if (!is_channel_valid(ch))
 333                         continue;
 334
 335                 if (is_channel_a_band(ch))
 336                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 337                 else
 338                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 339
 340                 geo_ch = &sband->channels[sband->n_channels++];
 341
 342                 geo_ch->center_freq =
 343                                 ieee80211_channel_to_frequency(ch->channel);
 344                 geo_ch->max_power = ch->max_power_avg;
 345                 geo_ch->max_antenna_gain = 0xff;
 346                 geo_ch->hw_value = ch->channel;
 347
 348                 if (is_channel_valid(ch)) {
 349                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 350                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 351
 352                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 353                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 354
 355                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 356                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 357
 358                         geo_ch->flags |= ch->ht40_extension_channel;
 359
 360                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 361                                 priv->tx_power_device_lmt = ch->max_power_avg;
 362                 } else {
 363                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 364                 }
 365
 366                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 367                                 ch->channel, geo_ch->center_freq,
 368                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 369                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 370                                 "restricted" : "valid",
 371                                  geo_ch->flags);
 372         }
 373
 374         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 375              priv->cfg->sku & IWL_SKU_A) {
 376                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 377                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 378                            priv->pci_dev->device,
 379                            priv->pci_dev->subsystem_device);
 380                 priv->cfg->sku &= ~IWL_SKU_A;
 381         }
 382
 383         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 384                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 385                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 386
 387         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 388
 389         return 0;
 390 }
 391 EXPORT_SYMBOL(iwlcore_init_geos);
 392
 393 /*
 394  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 395  */
 396 void iwlcore_free_geos(struct iwl_priv *priv)
 397 {
 398         kfree(priv->ieee_channels);
 399         kfree(priv->ieee_rates);
 400         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 401 }
 402 EXPORT_SYMBOL(iwlcore_free_geos);
 403
 404 /*
 405  *  iwlcore_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
 406  *  function.
 407  */
 408 void iwlcore_tx_cmd_protection(struct iwl_priv *priv,
 409                                struct ieee80211_tx_info *info,
 410                                __le16 fc, __le32 *tx_flags)
 411 {
 412         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 413                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 414                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 415                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 416
 417                 if (!ieee80211_is_mgmt(fc))
 418                         return;
 419
 420                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 421                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
 422                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
 423                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
 424                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
 425                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 426                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
 427                         break;
 428                 }
 429         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 430                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 431                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 432                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 433         }
 434 }
 435 EXPORT_SYMBOL(iwlcore_tx_cmd_protection);
 436
 437
 438 static bool is_single_rx_stream(struct iwl_priv *priv)
 439 {
 440         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 441                priv->current_ht_config.single_chain_sufficient;
 442 }
 443
 444 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 445                                    enum ieee80211_band band,
 446                                    u16 channel, u8 extension_chan_offset)
 447 {
 448         const struct iwl_channel_info *ch_info;
 449
 450         ch_info = iwl_get_channel_info(priv, band, channel);
 451         if (!is_channel_valid(ch_info))
 452                 return 0;
 453
 454         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 455                 return !(ch_info->ht40_extension_channel &
 456                                         IEEE80211_CHAN_NO_HT40PLUS);
 457         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 458                 return !(ch_info->ht40_extension_channel &
 459                                         IEEE80211_CHAN_NO_HT40MINUS);
 460
 461         return 0;
 462 }
 463
 464 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 465                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 466 {
 467         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 468 #if !TODO
 469         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 470 #endif
 471
 472         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 473                 return 0;
 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 (sta_ht_inf) {
 479                 if (!sta_ht_inf->ht_supported)
 480                         return 0;
 481         }
 482 #ifdef CONFIG_IWLWIFI_DEBUGFS
 483         if (priv->disable_ht40)
 484                 return 0;
 485 #endif
 486         return iwl_is_channel_extension(priv, priv->band,
 487                         le16_to_cpu(ctx->staging.channel),
 488                         ht_conf->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 = 0;
 495         u16 beacon_factor = 0;
 496
 497         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 498         new_val = beacon_val / beacon_factor;
 499
 500         if (!new_val)
 501                 new_val = max_beacon_val;
 502
 503         return new_val;
 504 }
 505
 506 int iwl_send_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif)
 507 {
 508         u64 tsf;
 509         s32 interval_tm, rem;
 510         struct ieee80211_conf *conf = NULL;
 511         u16 beacon_int;
 512         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 513
 514         conf = ieee80211_get_hw_conf(priv->hw);
 515
 516         lockdep_assert_held(&priv->mutex);
 517
 518         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 519
 520         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 521         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 522
 523         beacon_int = vif->bss_conf.beacon_int;
 524
 525         if (vif->type == NL80211_IFTYPE_ADHOC) {
 526                 /* TODO: we need to get atim_window from upper stack
 527                  * for now we set to 0 */
 528                 ctx->timing.atim_window = 0;
 529         } else {
 530                 ctx->timing.atim_window = 0;
 531         }
 532
 533         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 534                                 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
 535         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 536
 537         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 538         interval_tm = beacon_int * TIME_UNIT;
 539         rem = do_div(tsf, interval_tm);
 540         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 541
 542         IWL_DEBUG_ASSOC(priv,
 543                         "beacon interval %d beacon timer %d beacon tim %d\n",
 544                         le16_to_cpu(ctx->timing.beacon_interval),
 545                         le32_to_cpu(ctx->timing.beacon_init_val),
 546                         le16_to_cpu(ctx->timing.atim_window));
 547
 548         return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 549                                 sizeof(ctx->timing), &ctx->timing);
 550 }
 551 EXPORT_SYMBOL(iwl_send_rxon_timing);
 552
 553 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 554                            int hw_decrypt)
 555 {
 556         struct iwl_rxon_cmd *rxon = &ctx->staging;
 557
 558         if (hw_decrypt)
 559                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 560         else
 561                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 562
 563 }
 564 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 565
 566 /**
 567  * iwl_check_rxon_cmd - validate RXON structure is valid
 568  *
 569  * NOTE:  This is really only useful during development and can eventually
 570  * be #ifdef'd out once the driver is stable and folks aren't actively
 571  * making changes
 572  */
 573 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 574 {
 575         int error = 0;
 576         int counter = 1;
 577         struct iwl_rxon_cmd *rxon = &ctx->staging;
 578
 579         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 580                 error |= le32_to_cpu(rxon->flags &
 581                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 582                                  RXON_FLG_RADAR_DETECT_MSK));
 583                 if (error)
 584                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 585                                     counter++, error);
 586         } else {
 587                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 588                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 589                 if (error)
 590                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 591                                     counter++, error);
 592                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 593                 if (error)
 594                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 595                                     counter++, error);
 596         }
 597         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 598         if (error)
 599                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 600
 601         /* make sure basic rates 6Mbps and 1Mbps are supported */
 602         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 603                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 604         if (error)
 605                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 606
 607         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 608         if (error)
 609                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 610
 611         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 612                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 613         if (error)
 614                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 615                             counter++, error);
 616
 617         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 618                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 619         if (error)
 620                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 621                             counter++, error);
 622
 623         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 624                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 625         if (error)
 626                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 627                             counter++, error);
 628
 629         if (error)
 630                 IWL_WARN(priv, "Tuning to channel %d\n",
 631                             le16_to_cpu(rxon->channel));
 632
 633         if (error) {
 634                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 635                 return -1;
 636         }
 637         return 0;
 638 }
 639 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 640
 641 /**
 642  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 643  * @priv: staging_rxon is compared to active_rxon
 644  *
 645  * If the RXON structure is changing enough to require a new tune,
 646  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 647  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 648  */
 649 int iwl_full_rxon_required(struct iwl_priv *priv,
 650                            struct iwl_rxon_context *ctx)
 651 {
 652         const struct iwl_rxon_cmd *staging = &ctx->staging;
 653         const struct iwl_rxon_cmd *active = &ctx->active;
 654
 655 #define CHK(cond)                                                       \
 656         if ((cond)) {                                                   \
 657                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 658                 return 1;                                               \
 659         }
 660
 661 #define CHK_NEQ(c1, c2)                                         \
 662         if ((c1) != (c2)) {                                     \
 663                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 664                                #c1 " != " #c2 " - %d != %d\n",  \
 665                                (c1), (c2));                     \
 666                 return 1;                                       \
 667         }
 668
 669         /* These items are only settable from the full RXON command */
 670         CHK(!iwl_is_associated_ctx(ctx));
 671         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 672         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 673         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 674                                 active->wlap_bssid_addr));
 675         CHK_NEQ(staging->dev_type, active->dev_type);
 676         CHK_NEQ(staging->channel, active->channel);
 677         CHK_NEQ(staging->air_propagation, active->air_propagation);
 678         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 679                 active->ofdm_ht_single_stream_basic_rates);
 680         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 681                 active->ofdm_ht_dual_stream_basic_rates);
 682         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 683                 active->ofdm_ht_triple_stream_basic_rates);
 684         CHK_NEQ(staging->assoc_id, active->assoc_id);
 685
 686         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 687          * be updated with the RXON_ASSOC command -- however only some
 688          * flag transitions are allowed using RXON_ASSOC */
 689
 690         /* Check if we are not switching bands */
 691         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 692                 active->flags & RXON_FLG_BAND_24G_MSK);
 693
 694         /* Check if we are switching association toggle */
 695         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 696                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 697
 698 #undef CHK
 699 #undef CHK_NEQ
 700
 701         return 0;
 702 }
 703 EXPORT_SYMBOL(iwl_full_rxon_required);
 704
 705 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 706 {
 707 #if !TODO
 708         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 709 #endif
 710         /*
 711          * Assign the lowest rate -- should really get this from
 712          * the beacon skb from mac80211.
 713          */
 714         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
 715                 return IWL_RATE_1M_PLCP;
 716         else
 717                 return IWL_RATE_6M_PLCP;
 718 }
 719 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 720
 721 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 722                              struct iwl_ht_config *ht_conf,
 723                              struct iwl_rxon_context *ctx)
 724 {
 725         struct iwl_rxon_cmd *rxon = &ctx->staging;
 726
 727         if (!ht_conf->is_ht) {
 728                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 729                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 730                         RXON_FLG_HT40_PROT_MSK |
 731                         RXON_FLG_HT_PROT_MSK);
 732                 return;
 733         }
 734
 735         /* FIXME: if the definition of ht_protection changed, the "translation"
 736          * will be needed for rxon->flags
 737          */
 738         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 739
 740         /* Set up channel bandwidth:
 741          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 742         /* clear the HT channel mode before set the mode */
 743         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 744                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 745         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 746                 /* pure ht40 */
 747                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 748                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 749                         /* Note: control channel is opposite of extension channel */
 750                         switch (ht_conf->extension_chan_offset) {
 751                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 752                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 753                                 break;
 754                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 755                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 756                                 break;
 757                         }
 758                 } else {
 759                         /* Note: control channel is opposite of extension channel */
 760                         switch (ht_conf->extension_chan_offset) {
 761                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 762                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 763                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 764                                 break;
 765                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 766                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 767                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 768                                 break;
 769                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 770                         default:
 771                                 /* channel location only valid if in Mixed mode */
 772                                 IWL_ERR(priv, "invalid extension channel offset\n");
 773                                 break;
 774                         }
 775                 }
 776         } else {
 777                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 778         }
 779
 780         if (priv->cfg->ops->hcmd->set_rxon_chain)
 781                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 782
 783         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 784                         "extension channel offset 0x%x\n",
 785                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 786                         ht_conf->extension_chan_offset);
 787 }
 788
 789 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 790 {
 791         struct iwl_rxon_context *ctx;
 792
 793         for_each_context(priv, ctx)
 794                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 795 }
 796 EXPORT_SYMBOL(iwl_set_rxon_ht);
 797
 798 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 799 #define IWL_NUM_RX_CHAINS_SINGLE        2
 800 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 801 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 802
 803 /*
 804  * Determine how many receiver/antenna chains to use.
 805  *
 806  * More provides better reception via diversity.  Fewer saves power
 807  * at the expense of throughput, but only when not in powersave to
 808  * start with.
 809  *
 810  * MIMO (dual stream) requires at least 2, but works better with 3.
 811  * This does not determine *which* chains to use, just how many.
 812  */
 813 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 814 {
 815         if (priv->cfg->advanced_bt_coexist && (priv->bt_full_concurrent ||
 816             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 817                 /*
 818                  * only use chain 'A' in bt high traffic load or
 819                  * full concurrency mode
 820                  */
 821                 return IWL_NUM_RX_CHAINS_SINGLE;
 822         }
 823         /* # of Rx chains to use when expecting MIMO. */
 824         if (is_single_rx_stream(priv))
 825                 return IWL_NUM_RX_CHAINS_SINGLE;
 826         else
 827                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 828 }
 829
 830 /*
 831  * When we are in power saving mode, unless device support spatial
 832  * multiplexing power save, use the active count for rx chain count.
 833  */
 834 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 835 {
 836         /* # Rx chains when idling, depending on SMPS mode */
 837         switch (priv->current_ht_config.smps) {
 838         case IEEE80211_SMPS_STATIC:
 839         case IEEE80211_SMPS_DYNAMIC:
 840                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 841         case IEEE80211_SMPS_OFF:
 842                 return active_cnt;
 843         default:
 844                 WARN(1, "invalid SMPS mode %d",
 845                      priv->current_ht_config.smps);
 846                 return active_cnt;
 847         }
 848 }
 849
 850 /* up to 4 chains */
 851 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 852 {
 853         u8 res;
 854         res = (chain_bitmap & BIT(0)) >> 0;
 855         res += (chain_bitmap & BIT(1)) >> 1;
 856         res += (chain_bitmap & BIT(2)) >> 2;
 857         res += (chain_bitmap & BIT(3)) >> 3;
 858         return res;
 859 }
 860
 861 /**
 862  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 863  *
 864  * Selects how many and which Rx receivers/antennas/chains to use.
 865  * This should not be used for scan command ... it puts data in wrong place.
 866  */
 867 void iwl_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 868 {
 869         bool is_single = is_single_rx_stream(priv);
 870         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 871         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 872         u32 active_chains;
 873         u16 rx_chain;
 874
 875         /* Tell uCode which antennas are actually connected.
 876          * Before first association, we assume all antennas are connected.
 877          * Just after first association, iwl_chain_noise_calibration()
 878          *    checks which antennas actually *are* connected. */
 879         if (priv->chain_noise_data.active_chains)
 880                 active_chains = priv->chain_noise_data.active_chains;
 881         else
 882                 active_chains = priv->hw_params.valid_rx_ant;
 883
 884         if (priv->cfg->advanced_bt_coexist && (priv->bt_full_concurrent ||
 885             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 886                 /*
 887                  * only use chain 'A' in bt high traffic load or
 888                  * full concurrency mode
 889                  */
 890                 active_chains = first_antenna(active_chains);
 891         }
 892
 893         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 894
 895         /* How many receivers should we use? */
 896         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 897         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 898
 899
 900         /* correct rx chain count according hw settings
 901          * and chain noise calibration
 902          */
 903         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 904         if (valid_rx_cnt < active_rx_cnt)
 905                 active_rx_cnt = valid_rx_cnt;
 906
 907         if (valid_rx_cnt < idle_rx_cnt)
 908                 idle_rx_cnt = valid_rx_cnt;
 909
 910         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 911         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 912
 913         ctx->staging.rx_chain = cpu_to_le16(rx_chain);
 914
 915         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 916                 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 917         else
 918                 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 919
 920         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 921                         ctx->staging.rx_chain,
 922                         active_rx_cnt, idle_rx_cnt);
 923
 924         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 925                 active_rx_cnt < idle_rx_cnt);
 926 }
 927 EXPORT_SYMBOL(iwl_set_rxon_chain);
 928
 929 /* Return valid, unused, channel for a passive scan to reset the RF */
 930 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 931                                  enum ieee80211_band band)
 932 {
 933         const struct iwl_channel_info *ch_info;
 934         int i;
 935         u8 channel = 0;
 936         u8 min, max;
 937         struct iwl_rxon_context *ctx;
 938
 939         if (band == IEEE80211_BAND_5GHZ) {
 940                 min = 14;
 941                 max = priv->channel_count;
 942         } else {
 943                 min = 0;
 944                 max = 14;
 945         }
 946
 947         for (i = min; i < max; i++) {
 948                 bool busy = false;
 949
 950                 for_each_context(priv, ctx) {
 951                         busy = priv->channel_info[i].channel ==
 952                                 le16_to_cpu(ctx->staging.channel);
 953                         if (busy)
 954                                 break;
 955                 }
 956
 957                 if (busy)
 958                         continue;
 959
 960                 channel = priv->channel_info[i].channel;
 961                 ch_info = iwl_get_channel_info(priv, band, channel);
 962                 if (is_channel_valid(ch_info))
 963                         break;
 964         }
 965
 966         return channel;
 967 }
 968 EXPORT_SYMBOL(iwl_get_single_channel_number);
 969
 970 /**
 971  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 972  * @ch: requested channel as a pointer to struct ieee80211_channel
 973
 974  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 975  * in the staging RXON flag structure based on the ch->band
 976  */
 977 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 978                          struct iwl_rxon_context *ctx)
 979 {
 980         enum ieee80211_band band = ch->band;
 981         u16 channel = ch->hw_value;
 982
 983         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 984             (priv->band == band))
 985                 return 0;
 986
 987         ctx->staging.channel = cpu_to_le16(channel);
 988         if (band == IEEE80211_BAND_5GHZ)
 989                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 990         else
 991                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 992
 993         priv->band = band;
 994
 995         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 996
 997         return 0;
 998 }
 999 EXPORT_SYMBOL(iwl_set_rxon_channel);
1000
1001 void iwl_set_flags_for_band(struct iwl_priv *priv,
1002                             struct iwl_rxon_context *ctx,
1003                             enum ieee80211_band band,
1004                             struct ieee80211_vif *vif)
1005 {
1006         if (band == IEEE80211_BAND_5GHZ) {
1007                 ctx->staging.flags &=
1008                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1009                       | RXON_FLG_CCK_MSK);
1010                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1011         } else {
1012                 /* Copied from iwl_post_associate() */
1013                 if (vif && vif->bss_conf.use_short_slot)
1014                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1015                 else
1016                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1017
1018                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
1019                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
1020                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
1021         }
1022 }
1023 EXPORT_SYMBOL(iwl_set_flags_for_band);
1024
1025 /*
1026  * initialize rxon structure with default values from eeprom
1027  */
1028 void iwl_connection_init_rx_config(struct iwl_priv *priv,
1029                                    struct ieee80211_vif *vif)
1030 {
1031         const struct iwl_channel_info *ch_info;
1032         enum nl80211_iftype type = NL80211_IFTYPE_STATION;
1033         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1034
1035         if (vif) {
1036                 type = vif->type;
1037                 ctx = iwl_rxon_ctx_from_vif(vif);
1038         }
1039
1040         memset(&ctx->staging, 0, sizeof(ctx->staging));
1041
1042         switch (type) {
1043         case NL80211_IFTYPE_AP:
1044                 ctx->staging.dev_type = RXON_DEV_TYPE_AP;
1045                 break;
1046
1047         case NL80211_IFTYPE_STATION:
1048                 ctx->staging.dev_type = RXON_DEV_TYPE_ESS;
1049                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1050                 break;
1051
1052         case NL80211_IFTYPE_ADHOC:
1053                 ctx->staging.dev_type = RXON_DEV_TYPE_IBSS;
1054                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1055                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1056                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1057                 break;
1058
1059         default:
1060                 IWL_ERR(priv, "Unsupported interface type %d\n", type);
1061                 break;
1062         }
1063
1064 #if 0
1065         /* TODO:  Figure out when short_preamble would be set and cache from
1066          * that */
1067         if (!hw_to_local(priv->hw)->short_preamble)
1068                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1069         else
1070                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1071 #endif
1072
1073         ch_info = iwl_get_channel_info(priv, priv->band,
1074                                        le16_to_cpu(ctx->active.channel));
1075
1076         if (!ch_info)
1077                 ch_info = &priv->channel_info[0];
1078
1079         ctx->staging.channel = cpu_to_le16(ch_info->channel);
1080         priv->band = ch_info->band;
1081
1082         iwl_set_flags_for_band(priv, ctx, priv->band, vif);
1083
1084         ctx->staging.ofdm_basic_rates =
1085             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1086         ctx->staging.cck_basic_rates =
1087             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1088
1089         /* clear both MIX and PURE40 mode flag */
1090         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1091                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1092         if (vif)
1093                 memcpy(ctx->staging.node_addr, vif->addr, ETH_ALEN);
1094
1095         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
1096         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
1097         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
1098 }
1099 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1100
1101 void iwl_set_rate(struct iwl_priv *priv)
1102 {
1103         const struct ieee80211_supported_band *hw = NULL;
1104         struct ieee80211_rate *rate;
1105         struct iwl_rxon_context *ctx;
1106         int i;
1107
1108         hw = iwl_get_hw_mode(priv, priv->band);
1109         if (!hw) {
1110                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1111                 return;
1112         }
1113
1114         priv->active_rate = 0;
1115
1116         for (i = 0; i < hw->n_bitrates; i++) {
1117                 rate = &(hw->bitrates[i]);
1118                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1119                         priv->active_rate |= (1 << rate->hw_value);
1120         }
1121
1122         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1123
1124         for_each_context(priv, ctx) {
1125                 ctx->staging.cck_basic_rates =
1126                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1127
1128                 ctx->staging.ofdm_basic_rates =
1129                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1130         }
1131 }
1132 EXPORT_SYMBOL(iwl_set_rate);
1133
1134 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1135 {
1136         /*
1137          * MULTI-FIXME
1138          * See iwl_mac_channel_switch.
1139          */
1140         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1141
1142         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1143                 return;
1144
1145         if (priv->switch_rxon.switch_in_progress) {
1146                 ieee80211_chswitch_done(ctx->vif, is_success);
1147                 mutex_lock(&priv->mutex);
1148                 priv->switch_rxon.switch_in_progress = false;
1149                 mutex_unlock(&priv->mutex);
1150         }
1151 }
1152 EXPORT_SYMBOL(iwl_chswitch_done);
1153
1154 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1155 {
1156         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1157         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1158         /*
1159          * MULTI-FIXME
1160          * See iwl_mac_channel_switch.
1161          */
1162         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1163         struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
1164
1165         if (priv->switch_rxon.switch_in_progress) {
1166                 if (!le32_to_cpu(csa->status) &&
1167                     (csa->channel == priv->switch_rxon.channel)) {
1168                         rxon->channel = csa->channel;
1169                         ctx->staging.channel = csa->channel;
1170                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1171                               le16_to_cpu(csa->channel));
1172                         iwl_chswitch_done(priv, true);
1173                 } else {
1174                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1175                               le16_to_cpu(csa->channel));
1176                         iwl_chswitch_done(priv, false);
1177                 }
1178         }
1179 }
1180 EXPORT_SYMBOL(iwl_rx_csa);
1181
1182 #ifdef CONFIG_IWLWIFI_DEBUG
1183 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
1184                              struct iwl_rxon_context *ctx)
1185 {
1186         struct iwl_rxon_cmd *rxon = &ctx->staging;
1187
1188         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1189         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1190         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1191         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1192         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1193                         le32_to_cpu(rxon->filter_flags));
1194         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1195         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1196                         rxon->ofdm_basic_rates);
1197         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1198         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1199         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1200         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1201 }
1202 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1203 #endif
1204 /**
1205  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1206  */
1207 void iwl_irq_handle_error(struct iwl_priv *priv)
1208 {
1209         /* Set the FW error flag -- cleared on iwl_down */
1210         set_bit(STATUS_FW_ERROR, &priv->status);
1211
1212         /* Cancel currently queued command. */
1213         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1214
1215         IWL_ERR(priv, "Loaded firmware version: %s\n",
1216                 priv->hw->wiphy->fw_version);
1217
1218         priv->cfg->ops->lib->dump_nic_error_log(priv);
1219         if (priv->cfg->ops->lib->dump_csr)
1220                 priv->cfg->ops->lib->dump_csr(priv);
1221         if (priv->cfg->ops->lib->dump_fh)
1222                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1223         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1224 #ifdef CONFIG_IWLWIFI_DEBUG
1225         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1226                 iwl_print_rx_config_cmd(priv,
1227                                         &priv->contexts[IWL_RXON_CTX_BSS]);
1228 #endif
1229
1230         wake_up_interruptible(&priv->wait_command_queue);
1231
1232         /* Keep the restart process from trying to send host
1233          * commands by clearing the INIT status bit */
1234         clear_bit(STATUS_READY, &priv->status);
1235
1236         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1237                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1238                           "Restarting adapter due to uCode error.\n");
1239
1240                 if (priv->cfg->mod_params->restart_fw)
1241                         queue_work(priv->workqueue, &priv->restart);
1242         }
1243 }
1244 EXPORT_SYMBOL(iwl_irq_handle_error);
1245
1246 static int iwl_apm_stop_master(struct iwl_priv *priv)
1247 {
1248         int ret = 0;
1249
1250         /* stop device's busmaster DMA activity */
1251         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1252
1253         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1254                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1255         if (ret)
1256                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1257
1258         IWL_DEBUG_INFO(priv, "stop master\n");
1259
1260         return ret;
1261 }
1262
1263 void iwl_apm_stop(struct iwl_priv *priv)
1264 {
1265         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1266
1267         /* Stop device's DMA activity */
1268         iwl_apm_stop_master(priv);
1269
1270         /* Reset the entire device */
1271         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1272
1273         udelay(10);
1274
1275         /*
1276          * Clear "initialization complete" bit to move adapter from
1277          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1278          */
1279         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1280 }
1281 EXPORT_SYMBOL(iwl_apm_stop);
1282
1283
1284 /*
1285  * Start up NIC's basic functionality after it has been reset
1286  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1287  * NOTE:  This does not load uCode nor start the embedded processor
1288  */
1289 int iwl_apm_init(struct iwl_priv *priv)
1290 {
1291         int ret = 0;
1292         u16 lctl;
1293
1294         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1295
1296         /*
1297          * Use "set_bit" below rather than "write", to preserve any hardware
1298          * bits already set by default after reset.
1299          */
1300
1301         /* Disable L0S exit timer (platform NMI Work/Around) */
1302         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1303                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1304
1305         /*
1306          * Disable L0s without affecting L1;
1307          *  don't wait for ICH L0s (ICH bug W/A)
1308          */
1309         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1310                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1311
1312         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1313         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1314
1315         /*
1316          * Enable HAP INTA (interrupt from management bus) to
1317          * wake device's PCI Express link L1a -> L0s
1318          * NOTE:  This is no-op for 3945 (non-existant bit)
1319          */
1320         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1321                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1322
1323         /*
1324          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1325          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1326          * If so (likely), disable L0S, so device moves directly L0->L1;
1327          *    costs negligible amount of power savings.
1328          * If not (unlikely), enable L0S, so there is at least some
1329          *    power savings, even without L1.
1330          */
1331         if (priv->cfg->set_l0s) {
1332                 lctl = iwl_pcie_link_ctl(priv);
1333                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1334                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1335                         /* L1-ASPM enabled; disable(!) L0S  */
1336                         iwl_set_bit(priv, CSR_GIO_REG,
1337                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1338                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1339                 } else {
1340                         /* L1-ASPM disabled; enable(!) L0S */
1341                         iwl_clear_bit(priv, CSR_GIO_REG,
1342                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1343                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1344                 }
1345         }
1346
1347         /* Configure analog phase-lock-loop before activating to D0A */
1348         if (priv->cfg->pll_cfg_val)
1349                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1350
1351         /*
1352          * Set "initialization complete" bit to move adapter from
1353          * D0U* --> D0A* (powered-up active) state.
1354          */
1355         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1356
1357         /*
1358          * Wait for clock stabilization; once stabilized, access to
1359          * device-internal resources is supported, e.g. iwl_write_prph()
1360          * and accesses to uCode SRAM.
1361          */
1362         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1363                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1364                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1365         if (ret < 0) {
1366                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1367                 goto out;
1368         }
1369
1370         /*
1371          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1372          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1373          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1374          * and don't need BSM to restore data after power-saving sleep.
1375          *
1376          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1377          * do not disable clocks.  This preserves any hardware bits already
1378          * set by default in "CLK_CTRL_REG" after reset.
1379          */
1380         if (priv->cfg->use_bsm)
1381                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1382                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1383         else
1384                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1385                         APMG_CLK_VAL_DMA_CLK_RQT);
1386         udelay(20);
1387
1388         /* Disable L1-Active */
1389         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1390                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1391
1392 out:
1393         return ret;
1394 }
1395 EXPORT_SYMBOL(iwl_apm_init);
1396
1397
1398 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1399 {
1400         int ret = 0;
1401         s8 prev_tx_power = priv->tx_power_user_lmt;
1402
1403         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1404                 IWL_WARN(priv,
1405                          "Requested user TXPOWER %d below lower limit %d.\n",
1406                          tx_power,
1407                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1408                 return -EINVAL;
1409         }
1410
1411         if (tx_power > priv->tx_power_device_lmt) {
1412                 IWL_WARN(priv,
1413                         "Requested user TXPOWER %d above upper limit %d.\n",
1414                          tx_power, priv->tx_power_device_lmt);
1415                 return -EINVAL;
1416         }
1417
1418         if (priv->tx_power_user_lmt != tx_power)
1419                 force = true;
1420
1421         /* if nic is not up don't send command */
1422         if (iwl_is_ready_rf(priv)) {
1423                 priv->tx_power_user_lmt = tx_power;
1424                 if (force && priv->cfg->ops->lib->send_tx_power)
1425                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1426                 else if (!priv->cfg->ops->lib->send_tx_power)
1427                         ret = -EOPNOTSUPP;
1428                 /*
1429                  * if fail to set tx_power, restore the orig. tx power
1430                  */
1431                 if (ret)
1432                         priv->tx_power_user_lmt = prev_tx_power;
1433         }
1434
1435         /*
1436          * Even this is an async host command, the command
1437          * will always report success from uCode
1438          * So once driver can placing the command into the queue
1439          * successfully, driver can use priv->tx_power_user_lmt
1440          * to reflect the current tx power
1441          */
1442         return ret;
1443 }
1444 EXPORT_SYMBOL(iwl_set_tx_power);
1445
1446 irqreturn_t iwl_isr_legacy(int irq, void *data)
1447 {
1448         struct iwl_priv *priv = data;
1449         u32 inta, inta_mask;
1450         u32 inta_fh;
1451         unsigned long flags;
1452         if (!priv)
1453                 return IRQ_NONE;
1454
1455         spin_lock_irqsave(&priv->lock, flags);
1456
1457         /* Disable (but don't clear!) interrupts here to avoid
1458          *    back-to-back ISRs and sporadic interrupts from our NIC.
1459          * If we have something to service, the tasklet will re-enable ints.
1460          * If we *don't* have something, we'll re-enable before leaving here. */
1461         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1462         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1463
1464         /* Discover which interrupts are active/pending */
1465         inta = iwl_read32(priv, CSR_INT);
1466         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1467
1468         /* Ignore interrupt if there's nothing in NIC to service.
1469          * This may be due to IRQ shared with another device,
1470          * or due to sporadic interrupts thrown from our NIC. */
1471         if (!inta && !inta_fh) {
1472                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1473                 goto none;
1474         }
1475
1476         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1477                 /* Hardware disappeared. It might have already raised
1478                  * an interrupt */
1479                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1480                 goto unplugged;
1481         }
1482
1483         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1484                       inta, inta_mask, inta_fh);
1485
1486         inta &= ~CSR_INT_BIT_SCD;
1487
1488         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1489         if (likely(inta || inta_fh))
1490                 tasklet_schedule(&priv->irq_tasklet);
1491
1492  unplugged:
1493         spin_unlock_irqrestore(&priv->lock, flags);
1494         return IRQ_HANDLED;
1495
1496  none:
1497         /* re-enable interrupts here since we don't have anything to service. */
1498         /* only Re-enable if diabled by irq */
1499         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1500                 iwl_enable_interrupts(priv);
1501         spin_unlock_irqrestore(&priv->lock, flags);
1502         return IRQ_NONE;
1503 }
1504 EXPORT_SYMBOL(iwl_isr_legacy);
1505
1506 void iwl_send_bt_config(struct iwl_priv *priv)
1507 {
1508         struct iwl_bt_cmd bt_cmd = {
1509                 .lead_time = BT_LEAD_TIME_DEF,
1510                 .max_kill = BT_MAX_KILL_DEF,
1511                 .kill_ack_mask = 0,
1512                 .kill_cts_mask = 0,
1513         };
1514
1515         if (!bt_coex_active)
1516                 bt_cmd.flags = BT_COEX_DISABLE;
1517         else
1518                 bt_cmd.flags = BT_COEX_ENABLE;
1519
1520         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1521                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1522
1523         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1524                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1525                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1526 }
1527 EXPORT_SYMBOL(iwl_send_bt_config);
1528
1529 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1530 {
1531         struct iwl_statistics_cmd statistics_cmd = {
1532                 .configuration_flags =
1533                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1534         };
1535
1536         if (flags & CMD_ASYNC)
1537                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1538                                                sizeof(struct iwl_statistics_cmd),
1539                                                &statistics_cmd, NULL);
1540         else
1541                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1542                                         sizeof(struct iwl_statistics_cmd),
1543                                         &statistics_cmd);
1544 }
1545 EXPORT_SYMBOL(iwl_send_statistics_request);
1546
1547 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1548                            struct iwl_rx_mem_buffer *rxb)
1549 {
1550 #ifdef CONFIG_IWLWIFI_DEBUG
1551         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1552         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1553         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1554                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1555 #endif
1556 }
1557 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1558
1559 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1560                                       struct iwl_rx_mem_buffer *rxb)
1561 {
1562         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1563         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1564         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1565                         "notification for %s:\n", len,
1566                         get_cmd_string(pkt->hdr.cmd));
1567         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1568 }
1569 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1570
1571 void iwl_rx_reply_error(struct iwl_priv *priv,
1572                         struct iwl_rx_mem_buffer *rxb)
1573 {
1574         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1575
1576         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1577                 "seq 0x%04X ser 0x%08X\n",
1578                 le32_to_cpu(pkt->u.err_resp.error_type),
1579                 get_cmd_string(pkt->u.err_resp.cmd_id),
1580                 pkt->u.err_resp.cmd_id,
1581                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1582                 le32_to_cpu(pkt->u.err_resp.error_info));
1583 }
1584 EXPORT_SYMBOL(iwl_rx_reply_error);
1585
1586 void iwl_clear_isr_stats(struct iwl_priv *priv)
1587 {
1588         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1589 }
1590
1591 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1592                            const struct ieee80211_tx_queue_params *params)
1593 {
1594         struct iwl_priv *priv = hw->priv;
1595         struct iwl_rxon_context *ctx;
1596         unsigned long flags;
1597         int q;
1598
1599         IWL_DEBUG_MAC80211(priv, "enter\n");
1600
1601         if (!iwl_is_ready_rf(priv)) {
1602                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1603                 return -EIO;
1604         }
1605
1606         if (queue >= AC_NUM) {
1607                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1608                 return 0;
1609         }
1610
1611         q = AC_NUM - 1 - queue;
1612
1613         spin_lock_irqsave(&priv->lock, flags);
1614
1615         /*
1616          * MULTI-FIXME
1617          * This may need to be done per interface in nl80211/cfg80211/mac80211.
1618          */
1619         for_each_context(priv, ctx) {
1620                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1621                         cpu_to_le16(params->cw_min);
1622                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1623                         cpu_to_le16(params->cw_max);
1624                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1625                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1626                                 cpu_to_le16((params->txop * 32));
1627
1628                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1629         }
1630
1631         spin_unlock_irqrestore(&priv->lock, flags);
1632
1633         IWL_DEBUG_MAC80211(priv, "leave\n");
1634         return 0;
1635 }
1636 EXPORT_SYMBOL(iwl_mac_conf_tx);
1637
1638 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1639 {
1640         struct iwl_priv *priv = hw->priv;
1641
1642         return priv->ibss_manager == IWL_IBSS_MANAGER;
1643 }
1644 EXPORT_SYMBOL_GPL(iwl_mac_tx_last_beacon);
1645
1646 static void iwl_ht_conf(struct iwl_priv *priv,
1647                         struct ieee80211_vif *vif)
1648 {
1649         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1650         struct ieee80211_sta *sta;
1651         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1652
1653         IWL_DEBUG_MAC80211(priv, "enter:\n");
1654
1655         if (!ht_conf->is_ht)
1656                 return;
1657
1658         ht_conf->ht_protection =
1659                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1660         ht_conf->non_GF_STA_present =
1661                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1662
1663         ht_conf->single_chain_sufficient = false;
1664
1665         switch (vif->type) {
1666         case NL80211_IFTYPE_STATION:
1667                 rcu_read_lock();
1668                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1669                 if (sta) {
1670                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1671                         int maxstreams;
1672
1673                         maxstreams = (ht_cap->mcs.tx_params &
1674                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1675                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1676                         maxstreams += 1;
1677
1678                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1679                             (ht_cap->mcs.rx_mask[2] == 0))
1680                                 ht_conf->single_chain_sufficient = true;
1681                         if (maxstreams <= 1)
1682                                 ht_conf->single_chain_sufficient = true;
1683                 } else {
1684                         /*
1685                          * If at all, this can only happen through a race
1686                          * when the AP disconnects us while we're still
1687                          * setting up the connection, in that case mac80211
1688                          * will soon tell us about that.
1689                          */
1690                         ht_conf->single_chain_sufficient = true;
1691                 }
1692                 rcu_read_unlock();
1693                 break;
1694         case NL80211_IFTYPE_ADHOC:
1695                 ht_conf->single_chain_sufficient = true;
1696                 break;
1697         default:
1698                 break;
1699         }
1700
1701         IWL_DEBUG_MAC80211(priv, "leave\n");
1702 }
1703
1704 static inline void iwl_set_no_assoc(struct iwl_priv *priv,
1705                                     struct ieee80211_vif *vif)
1706 {
1707         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1708
1709         iwl_led_disassociate(priv);
1710         /*
1711          * inform the ucode that there is no longer an
1712          * association and that no more packets should be
1713          * sent
1714          */
1715         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1716         ctx->staging.assoc_id = 0;
1717         iwlcore_commit_rxon(priv, ctx);
1718 }
1719
1720 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1721 {
1722         struct iwl_priv *priv = hw->priv;
1723         unsigned long flags;
1724         __le64 timestamp;
1725
1726         IWL_DEBUG_MAC80211(priv, "enter\n");
1727
1728         if (!iwl_is_ready_rf(priv)) {
1729                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1730                 return -EIO;
1731         }
1732
1733         spin_lock_irqsave(&priv->lock, flags);
1734
1735         if (priv->ibss_beacon)
1736                 dev_kfree_skb(priv->ibss_beacon);
1737
1738         priv->ibss_beacon = skb;
1739
1740         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1741         priv->timestamp = le64_to_cpu(timestamp);
1742
1743         IWL_DEBUG_MAC80211(priv, "leave\n");
1744         spin_unlock_irqrestore(&priv->lock, flags);
1745
1746 #warning "use beacon context?"
1747         priv->cfg->ops->lib->post_associate(
1748                         priv, priv->contexts[IWL_RXON_CTX_BSS].vif);
1749
1750         return 0;
1751 }
1752
1753 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1754                           struct ieee80211_vif *vif,
1755                           struct ieee80211_bss_conf *bss_conf,
1756                           u32 changes)
1757 {
1758         struct iwl_priv *priv = hw->priv;
1759         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1760         int ret;
1761
1762         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1763
1764         if (!iwl_is_alive(priv))
1765                 return;
1766
1767         mutex_lock(&priv->mutex);
1768
1769         if (changes & BSS_CHANGED_QOS) {
1770                 unsigned long flags;
1771
1772                 spin_lock_irqsave(&priv->lock, flags);
1773                 ctx->qos_data.qos_active = bss_conf->qos;
1774                 iwl_update_qos(priv, ctx);
1775                 spin_unlock_irqrestore(&priv->lock, flags);
1776         }
1777
1778         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1779                 dev_kfree_skb(priv->ibss_beacon);
1780                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1781         }
1782
1783         if (changes & BSS_CHANGED_BEACON_INT) {
1784                 /* TODO: in AP mode, do something to make this take effect */
1785         }
1786
1787         if (changes & BSS_CHANGED_BSSID) {
1788                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1789
1790                 /*
1791                  * If there is currently a HW scan going on in the
1792                  * background then we need to cancel it else the RXON
1793                  * below/in post_associate will fail.
1794                  */
1795                 if (iwl_scan_cancel_timeout(priv, 100)) {
1796                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1797                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1798                         mutex_unlock(&priv->mutex);
1799                         return;
1800                 }
1801
1802                 /* mac80211 only sets assoc when in STATION mode */
1803                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1804                         memcpy(ctx->staging.bssid_addr,
1805                                bss_conf->bssid, ETH_ALEN);
1806
1807                         /* currently needed in a few places */
1808                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1809                 } else {
1810                         ctx->staging.filter_flags &=
1811                                 ~RXON_FILTER_ASSOC_MSK;
1812                 }
1813
1814         }
1815
1816         /*
1817          * This needs to be after setting the BSSID in case
1818          * mac80211 decides to do both changes at once because
1819          * it will invoke post_associate.
1820          */
1821         if (vif->type == NL80211_IFTYPE_ADHOC &&
1822             changes & BSS_CHANGED_BEACON) {
1823                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1824
1825                 if (beacon)
1826                         iwl_mac_beacon_update(hw, beacon);
1827         }
1828
1829         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1830                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1831                                    bss_conf->use_short_preamble);
1832                 if (bss_conf->use_short_preamble)
1833                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1834                 else
1835                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1836         }
1837
1838         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1839                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1840                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1841                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1842                 else
1843                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1844                 if (bss_conf->use_cts_prot)
1845                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1846                 else
1847                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1848         }
1849
1850         if (changes & BSS_CHANGED_BASIC_RATES) {
1851                 /* XXX use this information
1852                  *
1853                  * To do that, remove code from iwl_set_rate() and put something
1854                  * like this here:
1855                  *
1856                 if (A-band)
1857                         ctx->staging.ofdm_basic_rates =
1858                                 bss_conf->basic_rates;
1859                 else
1860                         ctx->staging.ofdm_basic_rates =
1861                                 bss_conf->basic_rates >> 4;
1862                         ctx->staging.cck_basic_rates =
1863                                 bss_conf->basic_rates & 0xF;
1864                  */
1865         }
1866
1867         if (changes & BSS_CHANGED_HT) {
1868                 iwl_ht_conf(priv, vif);
1869
1870                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1871                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1872         }
1873
1874         if (changes & BSS_CHANGED_ASSOC) {
1875                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1876                 if (bss_conf->assoc) {
1877                         priv->timestamp = bss_conf->timestamp;
1878
1879                         iwl_led_associate(priv);
1880
1881                         if (!iwl_is_rfkill(priv))
1882                                 priv->cfg->ops->lib->post_associate(priv, vif);
1883                 } else
1884                         iwl_set_no_assoc(priv, vif);
1885         }
1886
1887         if (changes && iwl_is_associated_ctx(ctx) && bss_conf->aid) {
1888                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1889                                    changes);
1890                 ret = iwl_send_rxon_assoc(priv, ctx);
1891                 if (!ret) {
1892                         /* Sync active_rxon with latest change. */
1893                         memcpy((void *)&ctx->active,
1894                                 &ctx->staging,
1895                                 sizeof(struct iwl_rxon_cmd));
1896                 }
1897         }
1898
1899         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1900                 if (vif->bss_conf.enable_beacon) {
1901                         memcpy(ctx->staging.bssid_addr,
1902                                bss_conf->bssid, ETH_ALEN);
1903                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1904                         iwlcore_config_ap(priv, vif);
1905                 } else
1906                         iwl_set_no_assoc(priv, vif);
1907         }
1908
1909         if (changes & BSS_CHANGED_IBSS) {
1910                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1911                                                         bss_conf->ibss_joined);
1912                 if (ret)
1913                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1914                                 bss_conf->ibss_joined ? "add" : "remove",
1915                                 bss_conf->bssid);
1916         }
1917
1918         mutex_unlock(&priv->mutex);
1919
1920         IWL_DEBUG_MAC80211(priv, "leave\n");
1921 }
1922 EXPORT_SYMBOL(iwl_bss_info_changed);
1923
1924 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1925 {
1926         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1927
1928         iwl_connection_init_rx_config(priv, vif);
1929
1930         if (priv->cfg->ops->hcmd->set_rxon_chain)
1931                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1932
1933         return iwlcore_commit_rxon(priv, ctx);
1934 }
1935
1936 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1937 {
1938         struct iwl_priv *priv = hw->priv;
1939         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1940         struct iwl_rxon_context *ctx;
1941         int err = 0;
1942
1943         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1944                            vif->type, vif->addr);
1945
1946         mutex_lock(&priv->mutex);
1947
1948         /* For now always use this context. */
1949         ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1950
1951         vif_priv->ctx = ctx;
1952
1953         if (WARN_ON(!iwl_is_ready_rf(priv))) {
1954                 err = -EINVAL;
1955                 goto out;
1956         }
1957
1958         if (ctx->vif) {
1959                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
1960                 err = -EOPNOTSUPP;
1961                 goto out;
1962         }
1963
1964         ctx->vif = vif;
1965         priv->iw_mode = vif->type;
1966
1967         err = iwl_set_mode(priv, vif);
1968         if (err)
1969                 goto out_err;
1970
1971         if (priv->cfg->advanced_bt_coexist &&
1972             vif->type == NL80211_IFTYPE_ADHOC) {
1973                 /*
1974                  * pretend to have high BT traffic as long as we
1975                  * are operating in IBSS mode, as this will cause
1976                  * the rate scaling etc. to behave as intended.
1977                  */
1978                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1979         }
1980
1981         goto out;
1982
1983  out_err:
1984         ctx->vif = NULL;
1985         priv->iw_mode = NL80211_IFTYPE_STATION;
1986  out:
1987         mutex_unlock(&priv->mutex);
1988
1989         IWL_DEBUG_MAC80211(priv, "leave\n");
1990         return err;
1991 }
1992 EXPORT_SYMBOL(iwl_mac_add_interface);
1993
1994 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1995                               struct ieee80211_vif *vif)
1996 {
1997         struct iwl_priv *priv = hw->priv;
1998         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1999         bool scan_completed = false;
2000
2001         IWL_DEBUG_MAC80211(priv, "enter\n");
2002
2003         mutex_lock(&priv->mutex);
2004
2005         if (iwl_is_ready_rf(priv)) {
2006                 iwl_scan_cancel_timeout(priv, 100);
2007                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2008                 iwlcore_commit_rxon(priv, ctx);
2009         }
2010
2011         if (priv->scan_vif == vif) {
2012                 scan_completed = true;
2013                 priv->scan_vif = NULL;
2014                 priv->scan_request = NULL;
2015         }
2016
2017         /*
2018          * When removing the IBSS interface, overwrite the
2019          * BT traffic load with the stored one from the last
2020          * notification, if any. If this is a device that
2021          * doesn't implement this, this has no effect since
2022          * both values are the same and zero.
2023          */
2024         if (vif->type == NL80211_IFTYPE_ADHOC)
2025                 priv->bt_traffic_load = priv->notif_bt_traffic_load;
2026
2027         WARN_ON(ctx->vif != vif);
2028         ctx->vif = NULL;
2029         memset(priv->bssid, 0, ETH_ALEN);
2030         mutex_unlock(&priv->mutex);
2031
2032         if (scan_completed)
2033                 ieee80211_scan_completed(priv->hw, true);
2034
2035         IWL_DEBUG_MAC80211(priv, "leave\n");
2036
2037 }
2038 EXPORT_SYMBOL(iwl_mac_remove_interface);
2039
2040 /**
2041  * iwl_mac_config - mac80211 config callback
2042  */
2043 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2044 {
2045         struct iwl_priv *priv = hw->priv;
2046         const struct iwl_channel_info *ch_info;
2047         struct ieee80211_conf *conf = &hw->conf;
2048         struct ieee80211_channel *channel = conf->channel;
2049         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2050         struct iwl_rxon_context *ctx;
2051         unsigned long flags = 0;
2052         int ret = 0;
2053         u16 ch;
2054         int scan_active = 0;
2055
2056         mutex_lock(&priv->mutex);
2057
2058         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2059                                         channel->hw_value, changed);
2060
2061         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2062                         test_bit(STATUS_SCANNING, &priv->status))) {
2063                 scan_active = 1;
2064                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2065         }
2066
2067         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2068                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2069                 /* mac80211 uses static for non-HT which is what we want */
2070                 priv->current_ht_config.smps = conf->smps_mode;
2071
2072                 /*
2073                  * Recalculate chain counts.
2074                  *
2075                  * If monitor mode is enabled then mac80211 will
2076                  * set up the SM PS mode to OFF if an HT channel is
2077                  * configured.
2078                  */
2079                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2080                         for_each_context(priv, ctx)
2081                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2082         }
2083
2084         /* during scanning mac80211 will delay channel setting until
2085          * scan finish with changed = 0
2086          */
2087         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2088                 if (scan_active)
2089                         goto set_ch_out;
2090
2091                 ch = channel->hw_value;
2092                 ch_info = iwl_get_channel_info(priv, channel->band, ch);
2093                 if (!is_channel_valid(ch_info)) {
2094                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2095                         ret = -EINVAL;
2096                         goto set_ch_out;
2097                 }
2098
2099                 spin_lock_irqsave(&priv->lock, flags);
2100
2101                 /* Configure HT40 channels */
2102                 ht_conf->is_ht = conf_is_ht(conf);
2103                 if (ht_conf->is_ht) {
2104                         if (conf_is_ht40_minus(conf)) {
2105                                 ht_conf->extension_chan_offset =
2106                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2107                                 ht_conf->is_40mhz = true;
2108                         } else if (conf_is_ht40_plus(conf)) {
2109                                 ht_conf->extension_chan_offset =
2110                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2111                                 ht_conf->is_40mhz = true;
2112                         } else {
2113                                 ht_conf->extension_chan_offset =
2114                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2115                                 ht_conf->is_40mhz = false;
2116                         }
2117                 } else
2118                         ht_conf->is_40mhz = false;
2119                 /* Default to no protection. Protection mode will later be set
2120                  * from BSS config in iwl_ht_conf */
2121                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2122
2123                 for_each_context(priv, ctx) {
2124                         /* if we are switching from ht to 2.4 clear flags
2125                          * from any ht related info since 2.4 does not
2126                          * support ht */
2127                         if ((le16_to_cpu(ctx->staging.channel) != ch))
2128                                 ctx->staging.flags = 0;
2129
2130                         iwl_set_rxon_channel(priv, channel, ctx);
2131                         iwl_set_rxon_ht(priv, ht_conf);
2132
2133                         iwl_set_flags_for_band(priv, ctx, channel->band,
2134                                                ctx->vif);
2135                 }
2136
2137                 spin_unlock_irqrestore(&priv->lock, flags);
2138
2139                 if (priv->cfg->ops->lib->update_bcast_stations)
2140                         ret = priv->cfg->ops->lib->update_bcast_stations(priv);
2141
2142  set_ch_out:
2143                 /* The list of supported rates and rate mask can be different
2144                  * for each band; since the band may have changed, reset
2145                  * the rate mask to what mac80211 lists */
2146                 iwl_set_rate(priv);
2147         }
2148
2149         if (changed & (IEEE80211_CONF_CHANGE_PS |
2150                         IEEE80211_CONF_CHANGE_IDLE)) {
2151                 ret = iwl_power_update_mode(priv, false);
2152                 if (ret)
2153                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2154         }
2155
2156         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2157                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2158                         priv->tx_power_user_lmt, conf->power_level);
2159
2160                 iwl_set_tx_power(priv, conf->power_level, false);
2161         }
2162
2163         if (!iwl_is_ready(priv)) {
2164                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2165                 goto out;
2166         }
2167
2168         if (scan_active)
2169                 goto out;
2170
2171         for_each_context(priv, ctx) {
2172                 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2173                         iwlcore_commit_rxon(priv, ctx);
2174                 else
2175                         IWL_DEBUG_INFO(priv,
2176                                 "Not re-sending same RXON configuration.\n");
2177         }
2178
2179 out:
2180         IWL_DEBUG_MAC80211(priv, "leave\n");
2181         mutex_unlock(&priv->mutex);
2182         return ret;
2183 }
2184 EXPORT_SYMBOL(iwl_mac_config);
2185
2186 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2187 {
2188         struct iwl_priv *priv = hw->priv;
2189         unsigned long flags;
2190         /* IBSS can only be the IWL_RXON_CTX_BSS context */
2191         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2192
2193         mutex_lock(&priv->mutex);
2194         IWL_DEBUG_MAC80211(priv, "enter\n");
2195
2196         spin_lock_irqsave(&priv->lock, flags);
2197         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2198         spin_unlock_irqrestore(&priv->lock, flags);
2199
2200         spin_lock_irqsave(&priv->lock, flags);
2201
2202         /* new association get rid of ibss beacon skb */
2203         if (priv->ibss_beacon)
2204                 dev_kfree_skb(priv->ibss_beacon);
2205
2206         priv->ibss_beacon = NULL;
2207
2208         priv->timestamp = 0;
2209
2210         spin_unlock_irqrestore(&priv->lock, flags);
2211
2212         if (!iwl_is_ready_rf(priv)) {
2213                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2214                 mutex_unlock(&priv->mutex);
2215                 return;
2216         }
2217
2218         /* we are restarting association process
2219          * clear RXON_FILTER_ASSOC_MSK bit
2220          */
2221         iwl_scan_cancel_timeout(priv, 100);
2222         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2223         iwlcore_commit_rxon(priv, ctx);
2224
2225         iwl_set_rate(priv);
2226
2227         mutex_unlock(&priv->mutex);
2228
2229         IWL_DEBUG_MAC80211(priv, "leave\n");
2230 }
2231 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2232
2233 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2234 {
2235         if (!priv->txq)
2236                 priv->txq = kzalloc(
2237                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2238                         GFP_KERNEL);
2239         if (!priv->txq) {
2240                 IWL_ERR(priv, "Not enough memory for txq\n");
2241                 return -ENOMEM;
2242         }
2243         return 0;
2244 }
2245 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2246
2247 void iwl_free_txq_mem(struct iwl_priv *priv)
2248 {
2249         kfree(priv->txq);
2250         priv->txq = NULL;
2251 }
2252 EXPORT_SYMBOL(iwl_free_txq_mem);
2253
2254 #ifdef CONFIG_IWLWIFI_DEBUGFS
2255
2256 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2257
2258 void iwl_reset_traffic_log(struct iwl_priv *priv)
2259 {
2260         priv->tx_traffic_idx = 0;
2261         priv->rx_traffic_idx = 0;
2262         if (priv->tx_traffic)
2263                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2264         if (priv->rx_traffic)
2265                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2266 }
2267
2268 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2269 {
2270         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2271
2272         if (iwl_debug_level & IWL_DL_TX) {
2273                 if (!priv->tx_traffic) {
2274                         priv->tx_traffic =
2275                                 kzalloc(traffic_size, GFP_KERNEL);
2276                         if (!priv->tx_traffic)
2277                                 return -ENOMEM;
2278                 }
2279         }
2280         if (iwl_debug_level & IWL_DL_RX) {
2281                 if (!priv->rx_traffic) {
2282                         priv->rx_traffic =
2283                                 kzalloc(traffic_size, GFP_KERNEL);
2284                         if (!priv->rx_traffic)
2285                                 return -ENOMEM;
2286                 }
2287         }
2288         iwl_reset_traffic_log(priv);
2289         return 0;
2290 }
2291 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2292
2293 void iwl_free_traffic_mem(struct iwl_priv *priv)
2294 {
2295         kfree(priv->tx_traffic);
2296         priv->tx_traffic = NULL;
2297
2298         kfree(priv->rx_traffic);
2299         priv->rx_traffic = NULL;
2300 }
2301 EXPORT_SYMBOL(iwl_free_traffic_mem);
2302
2303 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2304                       u16 length, struct ieee80211_hdr *header)
2305 {
2306         __le16 fc;
2307         u16 len;
2308
2309         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2310                 return;
2311
2312         if (!priv->tx_traffic)
2313                 return;
2314
2315         fc = header->frame_control;
2316         if (ieee80211_is_data(fc)) {
2317                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2318                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2319                 memcpy((priv->tx_traffic +
2320                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2321                        header, len);
2322                 priv->tx_traffic_idx =
2323                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2324         }
2325 }
2326 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2327
2328 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2329                       u16 length, struct ieee80211_hdr *header)
2330 {
2331         __le16 fc;
2332         u16 len;
2333
2334         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2335                 return;
2336
2337         if (!priv->rx_traffic)
2338                 return;
2339
2340         fc = header->frame_control;
2341         if (ieee80211_is_data(fc)) {
2342                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2343                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2344                 memcpy((priv->rx_traffic +
2345                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2346                        header, len);
2347                 priv->rx_traffic_idx =
2348                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2349         }
2350 }
2351 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2352
2353 const char *get_mgmt_string(int cmd)
2354 {
2355         switch (cmd) {
2356                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2357                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2358                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2359                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2360                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2361                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2362                 IWL_CMD(MANAGEMENT_BEACON);
2363                 IWL_CMD(MANAGEMENT_ATIM);
2364                 IWL_CMD(MANAGEMENT_DISASSOC);
2365                 IWL_CMD(MANAGEMENT_AUTH);
2366                 IWL_CMD(MANAGEMENT_DEAUTH);
2367                 IWL_CMD(MANAGEMENT_ACTION);
2368         default:
2369                 return "UNKNOWN";
2370
2371         }
2372 }
2373
2374 const char *get_ctrl_string(int cmd)
2375 {
2376         switch (cmd) {
2377                 IWL_CMD(CONTROL_BACK_REQ);
2378                 IWL_CMD(CONTROL_BACK);
2379                 IWL_CMD(CONTROL_PSPOLL);
2380                 IWL_CMD(CONTROL_RTS);
2381                 IWL_CMD(CONTROL_CTS);
2382                 IWL_CMD(CONTROL_ACK);
2383                 IWL_CMD(CONTROL_CFEND);
2384                 IWL_CMD(CONTROL_CFENDACK);
2385         default:
2386                 return "UNKNOWN";
2387
2388         }
2389 }
2390
2391 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2392 {
2393         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2394         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2395         priv->led_tpt = 0;
2396 }
2397
2398 /*
2399  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2400  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2401  * Use debugFs to display the rx/rx_statistics
2402  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2403  * information will be recorded, but DATA pkt still will be recorded
2404  * for the reason of iwl_led.c need to control the led blinking based on
2405  * number of tx and rx data.
2406  *
2407  */
2408 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2409 {
2410         struct traffic_stats    *stats;
2411
2412         if (is_tx)
2413                 stats = &priv->tx_stats;
2414         else
2415                 stats = &priv->rx_stats;
2416
2417         if (ieee80211_is_mgmt(fc)) {
2418                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2419                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2420                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2421                         break;
2422                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2423                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2424                         break;
2425                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2426                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2427                         break;
2428                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2429                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2430                         break;
2431                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2432                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2433                         break;
2434                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2435                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2436                         break;
2437                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2438                         stats->mgmt[MANAGEMENT_BEACON]++;
2439                         break;
2440                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2441                         stats->mgmt[MANAGEMENT_ATIM]++;
2442                         break;
2443                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2444                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2445                         break;
2446                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2447                         stats->mgmt[MANAGEMENT_AUTH]++;
2448                         break;
2449                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2450                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2451                         break;
2452                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2453                         stats->mgmt[MANAGEMENT_ACTION]++;
2454                         break;
2455                 }
2456         } else if (ieee80211_is_ctl(fc)) {
2457                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2458                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2459                         stats->ctrl[CONTROL_BACK_REQ]++;
2460                         break;
2461                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2462                         stats->ctrl[CONTROL_BACK]++;
2463                         break;
2464                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2465                         stats->ctrl[CONTROL_PSPOLL]++;
2466                         break;
2467                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2468                         stats->ctrl[CONTROL_RTS]++;
2469                         break;
2470                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2471                         stats->ctrl[CONTROL_CTS]++;
2472                         break;
2473                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2474                         stats->ctrl[CONTROL_ACK]++;
2475                         break;
2476                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2477                         stats->ctrl[CONTROL_CFEND]++;
2478                         break;
2479                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2480                         stats->ctrl[CONTROL_CFENDACK]++;
2481                         break;
2482                 }
2483         } else {
2484                 /* data */
2485                 stats->data_cnt++;
2486                 stats->data_bytes += len;
2487         }
2488         iwl_leds_background(priv);
2489 }
2490 EXPORT_SYMBOL(iwl_update_stats);
2491 #endif
2492
2493 static const char *get_csr_string(int cmd)
2494 {
2495         switch (cmd) {
2496                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2497                 IWL_CMD(CSR_INT_COALESCING);
2498                 IWL_CMD(CSR_INT);
2499                 IWL_CMD(CSR_INT_MASK);
2500                 IWL_CMD(CSR_FH_INT_STATUS);
2501                 IWL_CMD(CSR_GPIO_IN);
2502                 IWL_CMD(CSR_RESET);
2503                 IWL_CMD(CSR_GP_CNTRL);
2504                 IWL_CMD(CSR_HW_REV);
2505                 IWL_CMD(CSR_EEPROM_REG);
2506                 IWL_CMD(CSR_EEPROM_GP);
2507                 IWL_CMD(CSR_OTP_GP_REG);
2508                 IWL_CMD(CSR_GIO_REG);
2509                 IWL_CMD(CSR_GP_UCODE_REG);
2510                 IWL_CMD(CSR_GP_DRIVER_REG);
2511                 IWL_CMD(CSR_UCODE_DRV_GP1);
2512                 IWL_CMD(CSR_UCODE_DRV_GP2);
2513                 IWL_CMD(CSR_LED_REG);
2514                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2515                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2516                 IWL_CMD(CSR_ANA_PLL_CFG);
2517                 IWL_CMD(CSR_HW_REV_WA_REG);
2518                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2519         default:
2520                 return "UNKNOWN";
2521
2522         }
2523 }
2524
2525 void iwl_dump_csr(struct iwl_priv *priv)
2526 {
2527         int i;
2528         u32 csr_tbl[] = {
2529                 CSR_HW_IF_CONFIG_REG,
2530                 CSR_INT_COALESCING,
2531                 CSR_INT,
2532                 CSR_INT_MASK,
2533                 CSR_FH_INT_STATUS,
2534                 CSR_GPIO_IN,
2535                 CSR_RESET,
2536                 CSR_GP_CNTRL,
2537                 CSR_HW_REV,
2538                 CSR_EEPROM_REG,
2539                 CSR_EEPROM_GP,
2540                 CSR_OTP_GP_REG,
2541                 CSR_GIO_REG,
2542                 CSR_GP_UCODE_REG,
2543                 CSR_GP_DRIVER_REG,
2544                 CSR_UCODE_DRV_GP1,
2545                 CSR_UCODE_DRV_GP2,
2546                 CSR_LED_REG,
2547                 CSR_DRAM_INT_TBL_REG,
2548                 CSR_GIO_CHICKEN_BITS,
2549                 CSR_ANA_PLL_CFG,
2550                 CSR_HW_REV_WA_REG,
2551                 CSR_DBG_HPET_MEM_REG
2552         };
2553         IWL_ERR(priv, "CSR values:\n");
2554         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2555                 "CSR_INT_PERIODIC_REG)\n");
2556         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2557                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2558                         get_csr_string(csr_tbl[i]),
2559                         iwl_read32(priv, csr_tbl[i]));
2560         }
2561 }
2562 EXPORT_SYMBOL(iwl_dump_csr);
2563
2564 static const char *get_fh_string(int cmd)
2565 {
2566         switch (cmd) {
2567                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2568                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2569                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2570                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2571                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2572                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2573                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2574                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2575                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2576         default:
2577                 return "UNKNOWN";
2578
2579         }
2580 }
2581
2582 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2583 {
2584         int i;
2585 #ifdef CONFIG_IWLWIFI_DEBUG
2586         int pos = 0;
2587         size_t bufsz = 0;
2588 #endif
2589         u32 fh_tbl[] = {
2590                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2591                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2592                 FH_RSCSR_CHNL0_WPTR,
2593                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2594                 FH_MEM_RSSR_SHARED_CTRL_REG,
2595                 FH_MEM_RSSR_RX_STATUS_REG,
2596                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2597                 FH_TSSR_TX_STATUS_REG,
2598                 FH_TSSR_TX_ERROR_REG
2599         };
2600 #ifdef CONFIG_IWLWIFI_DEBUG
2601         if (display) {
2602                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2603                 *buf = kmalloc(bufsz, GFP_KERNEL);
2604                 if (!*buf)
2605                         return -ENOMEM;
2606                 pos += scnprintf(*buf + pos, bufsz - pos,
2607                                 "FH register values:\n");
2608                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2609                         pos += scnprintf(*buf + pos, bufsz - pos,
2610                                 "  %34s: 0X%08x\n",
2611                                 get_fh_string(fh_tbl[i]),
2612                                 iwl_read_direct32(priv, fh_tbl[i]));
2613                 }
2614                 return pos;
2615         }
2616 #endif
2617         IWL_ERR(priv, "FH register values:\n");
2618         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2619                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2620                         get_fh_string(fh_tbl[i]),
2621                         iwl_read_direct32(priv, fh_tbl[i]));
2622         }
2623         return 0;
2624 }
2625 EXPORT_SYMBOL(iwl_dump_fh);
2626
2627 static void iwl_force_rf_reset(struct iwl_priv *priv)
2628 {
2629         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2630                 return;
2631
2632         if (!iwl_is_any_associated(priv)) {
2633                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2634                 return;
2635         }
2636         /*
2637          * There is no easy and better way to force reset the radio,
2638          * the only known method is switching channel which will force to
2639          * reset and tune the radio.
2640          * Use internal short scan (single channel) operation to should
2641          * achieve this objective.
2642          * Driver should reset the radio when number of consecutive missed
2643          * beacon, or any other uCode error condition detected.
2644          */
2645         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2646         iwl_internal_short_hw_scan(priv);
2647 }
2648
2649
2650 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
2651 {
2652         struct iwl_force_reset *force_reset;
2653
2654         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2655                 return -EINVAL;
2656
2657         if (mode >= IWL_MAX_FORCE_RESET) {
2658                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2659                 return -EINVAL;
2660         }
2661         force_reset = &priv->force_reset[mode];
2662         force_reset->reset_request_count++;
2663         if (!external) {
2664                 if (force_reset->last_force_reset_jiffies &&
2665                     time_after(force_reset->last_force_reset_jiffies +
2666                     force_reset->reset_duration, jiffies)) {
2667                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
2668                         force_reset->reset_reject_count++;
2669                         return -EAGAIN;
2670                 }
2671         }
2672         force_reset->reset_success_count++;
2673         force_reset->last_force_reset_jiffies = jiffies;
2674         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2675         switch (mode) {
2676         case IWL_RF_RESET:
2677                 iwl_force_rf_reset(priv);
2678                 break;
2679         case IWL_FW_RESET:
2680                 /*
2681                  * if the request is from external(ex: debugfs),
2682                  * then always perform the request in regardless the module
2683                  * parameter setting
2684                  * if the request is from internal (uCode error or driver
2685                  * detect failure), then fw_restart module parameter
2686                  * need to be check before performing firmware reload
2687                  */
2688                 if (!external && !priv->cfg->mod_params->restart_fw) {
2689                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
2690                                        "module parameter setting\n");
2691                         break;
2692                 }
2693                 IWL_ERR(priv, "On demand firmware reload\n");
2694                 /* Set the FW error flag -- cleared on iwl_down */
2695                 set_bit(STATUS_FW_ERROR, &priv->status);
2696                 wake_up_interruptible(&priv->wait_command_queue);
2697                 /*
2698                  * Keep the restart process from trying to send host
2699                  * commands by clearing the INIT status bit
2700                  */
2701                 clear_bit(STATUS_READY, &priv->status);
2702                 queue_work(priv->workqueue, &priv->restart);
2703                 break;
2704         }
2705         return 0;
2706 }
2707 EXPORT_SYMBOL(iwl_force_reset);
2708
2709 /**
2710  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2711  *
2712  * During normal condition (no queue is stuck), the timer is continually set to
2713  * execute every monitor_recover_period milliseconds after the last timer
2714  * expired.  When the queue read_ptr is at the same place, the timer is
2715  * shorten to 100mSecs.  This is
2716  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2717  *      2) to detect the stuck queues quicker before the station and AP can
2718  *      disassociate each other.
2719  *
2720  * This function monitors all the tx queues and recover from it if any
2721  * of the queues are stuck.
2722  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2723  *      it will recover by resetting the firmware and return.
2724  * 2. Then, it checks for station association.  If it associates it will check
2725  *      other queues.  If any queue is stuck, it will recover by resetting
2726  *      the firmware.
2727  * Note: It the number of times the queue read_ptr to be at the same place to
2728  *      be MAX_REPEAT+1 in order to consider to be stuck.
2729  */
2730 /*
2731  * The maximum number of times the read pointer of the tx queue at the
2732  * same place without considering to be stuck.
2733  */
2734 #define MAX_REPEAT      (2)
2735 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2736 {
2737         struct iwl_tx_queue *txq;
2738         struct iwl_queue *q;
2739
2740         txq = &priv->txq[cnt];
2741         q = &txq->q;
2742         /* queue is empty, skip */
2743         if (q->read_ptr != q->write_ptr) {
2744                 if (q->read_ptr == q->last_read_ptr) {
2745                         /* a queue has not been read from last time */
2746                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2747                                 IWL_ERR(priv,
2748                                         "queue %d stuck %d time. Fw reload.\n",
2749                                         q->id, q->repeat_same_read_ptr);
2750                                 q->repeat_same_read_ptr = 0;
2751                                 iwl_force_reset(priv, IWL_FW_RESET, false);
2752                         } else {
2753                                 q->repeat_same_read_ptr++;
2754                                 IWL_DEBUG_RADIO(priv,
2755                                                 "queue %d, not read %d time\n",
2756                                                 q->id,
2757                                                 q->repeat_same_read_ptr);
2758                                 if (!priv->cfg->advanced_bt_coexist) {
2759                                         mod_timer(&priv->monitor_recover,
2760                                                 jiffies + msecs_to_jiffies(
2761                                                 IWL_ONE_HUNDRED_MSECS));
2762                                         return 1;
2763                                 }
2764                         }
2765                         return 0;
2766                 } else {
2767                         q->last_read_ptr = q->read_ptr;
2768                         q->repeat_same_read_ptr = 0;
2769                 }
2770         }
2771         return 0;
2772 }
2773
2774 void iwl_bg_monitor_recover(unsigned long data)
2775 {
2776         struct iwl_priv *priv = (struct iwl_priv *)data;
2777         int cnt;
2778
2779         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2780                 return;
2781
2782         /* monitor and check for stuck cmd queue */
2783         if (iwl_check_stuck_queue(priv, priv->cmd_queue))
2784                 return;
2785
2786         /* monitor and check for other stuck queues */
2787         if (iwl_is_any_associated(priv)) {
2788                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2789                         /* skip as we already checked the command queue */
2790                         if (cnt == priv->cmd_queue)
2791                                 continue;
2792                         if (iwl_check_stuck_queue(priv, cnt))
2793                                 return;
2794                 }
2795         }
2796         if (priv->cfg->monitor_recover_period) {
2797                 /*
2798                  * Reschedule the timer to occur in
2799                  * priv->cfg->monitor_recover_period
2800                  */
2801                 mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(
2802                           priv->cfg->monitor_recover_period));
2803         }
2804 }
2805 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2806
2807
2808 /*
2809  * extended beacon time format
2810  * time in usec will be changed into a 32-bit value in extended:internal format
2811  * the extended part is the beacon counts
2812  * the internal part is the time in usec within one beacon interval
2813  */
2814 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2815 {
2816         u32 quot;
2817         u32 rem;
2818         u32 interval = beacon_interval * TIME_UNIT;
2819
2820         if (!interval || !usec)
2821                 return 0;
2822
2823         quot = (usec / interval) &
2824                 (iwl_beacon_time_mask_high(priv,
2825                 priv->hw_params.beacon_time_tsf_bits) >>
2826                 priv->hw_params.beacon_time_tsf_bits);
2827         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2828                                    priv->hw_params.beacon_time_tsf_bits);
2829
2830         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2831 }
2832 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2833
2834 /* base is usually what we get from ucode with each received frame,
2835  * the same as HW timer counter counting down
2836  */
2837 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2838                            u32 addon, u32 beacon_interval)
2839 {
2840         u32 base_low = base & iwl_beacon_time_mask_low(priv,
2841                                         priv->hw_params.beacon_time_tsf_bits);
2842         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2843                                         priv->hw_params.beacon_time_tsf_bits);
2844         u32 interval = beacon_interval * TIME_UNIT;
2845         u32 res = (base & iwl_beacon_time_mask_high(priv,
2846                                 priv->hw_params.beacon_time_tsf_bits)) +
2847                                 (addon & iwl_beacon_time_mask_high(priv,
2848                                 priv->hw_params.beacon_time_tsf_bits));
2849
2850         if (base_low > addon_low)
2851                 res += base_low - addon_low;
2852         else if (base_low < addon_low) {
2853                 res += interval + base_low - addon_low;
2854                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2855         } else
2856                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2857
2858         return cpu_to_le32(res);
2859 }
2860 EXPORT_SYMBOL(iwl_add_beacon_time);
2861
2862 #ifdef CONFIG_PM
2863
2864 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2865 {
2866         struct iwl_priv *priv = pci_get_drvdata(pdev);
2867
2868         /*
2869          * This function is called when system goes into suspend state
2870          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2871          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2872          * it will not call apm_ops.stop() to stop the DMA operation.
2873          * Calling apm_ops.stop here to make sure we stop the DMA.
2874          */
2875         priv->cfg->ops->lib->apm_ops.stop(priv);
2876
2877         pci_save_state(pdev);
2878         pci_disable_device(pdev);
2879         pci_set_power_state(pdev, PCI_D3hot);
2880
2881         return 0;
2882 }
2883 EXPORT_SYMBOL(iwl_pci_suspend);
2884
2885 int iwl_pci_resume(struct pci_dev *pdev)
2886 {
2887         struct iwl_priv *priv = pci_get_drvdata(pdev);
2888         int ret;
2889         bool hw_rfkill = false;
2890
2891         /*
2892          * We disable the RETRY_TIMEOUT register (0x41) to keep
2893          * PCI Tx retries from interfering with C3 CPU state.
2894          */
2895         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2896
2897         pci_set_power_state(pdev, PCI_D0);
2898         ret = pci_enable_device(pdev);
2899         if (ret)
2900                 return ret;
2901         pci_restore_state(pdev);
2902         iwl_enable_interrupts(priv);
2903
2904         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2905                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2906                 hw_rfkill = true;
2907
2908         if (hw_rfkill)
2909                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2910         else
2911                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2912
2913         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2914
2915         return 0;
2916 }
2917 EXPORT_SYMBOL(iwl_pci_resume);
2918
2919 #endif /* CONFIG_PM */