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